JP4467102B2 - cap - Google Patents

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Publication number
JP4467102B2
JP4467102B2 JP20088699A JP20088699A JP4467102B2 JP 4467102 B2 JP4467102 B2 JP 4467102B2 JP 20088699 A JP20088699 A JP 20088699A JP 20088699 A JP20088699 A JP 20088699A JP 4467102 B2 JP4467102 B2 JP 4467102B2
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JP
Japan
Prior art keywords
cap
bent
locking ring
locking
bent portion
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.)
Expired - Fee Related
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JP20088699A
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Japanese (ja)
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JP2001031122A (en
Inventor
輝昭 林田
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Mikasa Sangyo Co Ltd
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Mikasa Sangyo Co Ltd
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Priority to JP20088699A priority Critical patent/JP4467102B2/en
Publication of JP2001031122A publication Critical patent/JP2001031122A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
    • B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
    • B65D41/3423—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt
    • B65D41/3428—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt the tamper element being integrally connected to the closure by means of bridges

Description

【０００１】
【発明の属する技術分野】
この発明は、液体容器の口部に嵌着されるピルファープルーフ機能を備えた合成樹脂製のキャップに関するものである。
【０００２】
【従来の技術】
図５〜図８に示すように、キャップ本体１ａの下端より捩切り可能部（ブリッジ）２を介して円筒状のバンド部３を一体的に形成し、該バンド部３の下端内縁から傾斜して立設された截頭円錐形の内筒（係止リング）４に、瓶口５の膨出部６の下周面６ａに係止する多数の山形状の係止部７を、屈曲または折曲して形成したキャップ１は、例えば実開平４−７４６４４号公報その他により知られている。
【０００３】
このような構成により、キャップ本体１ａをねじ回し開栓しようとすると、瓶口５の膨出部６の下周面６ａに係止する多数の山形状の係止部７によってピルファープルーフ機能を備えたバンドの上動が阻止され、ブリッジ２を破断するため、これによって開栓されたことを検知することが出来る。
【０００４】
これら従来の技術は大別して二つに分けられる。すなわち、一つは図７に示すように、外方に屈曲した面７ｍの上縁部外側先端Ｑ3 が最も高く、この上縁部外側先端Ｑ3 を瓶口５の膨出部６の下周面６ａの外周縁部６ａ1 に係止するＡ方式であり、他の一つは、図８に示すように、外方に屈曲した面７ｍの上縁部が水平状態で係止リング４の内側の屈曲部７ａの上端を膨出部６の下周面６ａに係止するＢ方式である。
【０００５】
【発明が解決しようとする課題】
ところが、上記Ａ方式にあっては、外方に屈曲した面外側の折曲げ部７ｂの上端が形成する仮想円の直径が膨出部の直径に匹敵する位大きいので、開栓時にすっぽ抜け、開栓したにも拘らず、ブリッジが破断されないことがある。
また、図８に示すＢ方式にあっては、Ａ方式とは異なり、係止リング４内側の屈曲部７ａの上端が形成する仮想円の直径が膨出部の直径に比べ小さいので、係止リングのすっぽ抜けは起りにくい反面、キヤップを瓶口に装着する際、係止リングは拡径して断面円形となって瓶口の膨出部（係合段部）６を乗越えるが、その際の拡開に要する応力は外方における折曲げ部７ｂの線分ＯＱの長さに対応して大きくなるので、比較的大きな応力が発生し、このため捩切り可能部（ブリッジ）２が切れ易くなり、装着不良品が発生する恐れがある。
【０００６】
本発明はこれらの問題点を解決するためになされたもので、開栓時に係止リングが上方にすっぽり抜けることがなく、瓶口に装着時ブリッジに係る応力を制限し、ブリッジ切れの起らないキャップを提供することを目的とする。
【０００７】
この発明は、キャップ本体（１ａ）の下端より捩切り可能部（２）を介して円筒状のバンド部（３）を一体的に形成し、該バンド部（３）の下端内縁から截頭円錐形の係止リング（４）が上方及び内方に傾斜して立設され、前記係止リング（４）の上端は、瓶口（５）の膨出部（６）の下周面（６ａ）に係止する多数の山形状の係止部（７）を備えているキャップにおいて、 前記係止リング（４）が、内方への屈曲部（７ａ）と、外方への折曲げ部（７ｂ）とを交互に備えており、前記山形状の係止部（７）は、前記屈曲部（７ａ）から前記折曲げ部(７ｂ)への係止リングの上縁（Ｑ1）をテーパ状(Ｐ2Ｑ1)として、前記上縁（Ｑ1）を前記屈曲部（７ａ）の上端（Ｐ2）より低く設定しており、前記キャップ(１)を前記瓶口（５）に装着した時に、前記屈曲部（７ａ）の上端（Ｐ2） が、上記膨出部（６）の下周面（６ａ）に係止するものである。
【０００８】
また、本発明は、係止部を含む内筒の上縁部の平面投影長さがバンド部の内周長さおよび膨出部の外周長さよりも小さく設定されることが好ましい。
【０００９】
【発明の実施の形態】
発明の実施の形態を実施例に基づき図面を参照して説明する。先行技術と同一部分または相当部分には同一符号を付し、一部説明を省略する。図1は本発明のキャップの一部縦断正面図、図2は同裏面図、図3は要部の拡大図、図4は同作用説明図である。図において、１はピルファープルーフ機能を備えたキャップ、１ａはキャップ本体で、捩切り可能部２を介して円筒状のバンド部３を一体的に形成している。４は截頭円錐形の係止リングで、バンド部３の下端内縁から上方及び内方に傾斜して立設されている。７は多数の山形状の係止部で、係止リングの上端から下端に向けて一点に収斂するように形成されており、瓶口５の膨出部６の下周面６ａに係止されるものである。前記係止部７は、屈曲部７ａと、該屈曲部７ａの両側に設けられた、外方に屈曲した面７ｍと、前記外方に屈曲した面７ｍ外側の折曲げ部７ｂとを備えている
【００１０】
図４に基づいて、作用効果について説明する。開栓時に、係止リング４は折り返し部Ｏを基点としてＢ方向に回動する。屈曲部７ａの線分ＯＰ2 の長さは図８に示す従来方式（Ｂ方式）、即ち、屈曲部をＯＰ1 のように形成した場合の長さＲ1 に比べてＲ2 だけ大きい。従って、係止リング４がＢ方向に倒れたとき、Ｐ2 はＰ1 よりも、より中心側に位置することになる。即ち、各屈曲部７ａの上端Ｐ2 が形成する仮想円の直径は、Ｐ1 の形成する仮想円の直径より小さくなる。従って、開栓時に係止リング４がすっぽ抜けしにくくなりタンパーエビデント性に関する信頼性が高くなる。
【００１１】
一方、図８に示す従来のＢ方式のものと同じように、もしも、屈曲部７ａより外方に屈曲した面７ｍの上縁をＰ2 Ｑ2 のように水平に形成すれば、すっぽ抜け効果は本発明とほぼ同様である。しかし、この場合はキャップを瓶口に装着する際、係止リング４は弾性的に拡径して断面円形となって瓶口の膨出部（係合段部）６を乗越えるが、その際の拡径に要する応力が線分Ｑ1 Ｑ2 の分だけ大きくなるため、捩切り可能部（ブリッジ）２に係る力がその分だけ大きくなり、ブリッジが切れ易くなる。従って、本発明では屈曲部７ａの上端を、この屈曲部より外方に屈曲した部分より高く位置させ、屈曲部７ａより外方に屈曲した面７ｍの上縁をＰ2 Ｑ1 のようにテーパー状として、Ｑ1 の位置を低く設定し、折曲げ部７ｂの長さ（線分ＯＱ1 ）を制限し、これにより、キャップを瓶口に装着する際の拡径に要する応力が小さく押さえられ、ブリッジ切れが生じない。
【００１２】
さらに、本発明では係止部を含む内筒の上縁部の平面投影長さがバンド部の内周長さおよび膨出部の外周長さよりも小さく設定することが好ましい。
実施例において、キャップのバンド部３の内径は３０．０ｍｍに、係止リング４の上縁部の長さは平面視で８４．０ｍｍに設定されている。従って、係止リング４の上縁は直径が８４．０÷π＝２６．７４まで拡径したときに真円状となる。このとき、係止リング４の山形状の係止部７は係止リング４の上端から下端に向けて一点に収斂するように形成されているため、係止リング４は下端から上端に向けて均一に拡径し、完全に截頭円錐の形状となる。仮に、瓶口の膨出部（係合段部）６の最大外径を２９．０ｍｍとすれば、係止リングの上縁部は（２９．０−２６．７４）×π ＝７ｍｍだけ更に周方向に引伸ばされて係合段部６を乗越えることになる。従って、上記のように設定すれば、開栓時に係止リング４が一段とすっぽ抜けしにくくなりタンパーエビデント性に関する信頼性が一層高くなる。
【００１３】
【発明の効果】
本発明は、以上説明したように構成されているので、以下に記載されるような効果を奏する。
【００１４】
本発明の請求項１記載のキャップは、キャップ本体（１ａ）の下端より捩切り可能部（２）を介して円筒状のバンド部（３）を一体的に形成し、該バンド部（３）の下端内縁から截頭円錐形の係止リング（４）が上方及び内方に傾斜して立設され、前記係止リング（４）の上端は、瓶口（５）の膨出部（６）の下周面（６ａ）に係止する多数の山形状の係止部（７）を備えているキャップにおいて、 前記係止リング（４）が、内方への屈曲部（７ａ）と、外方への折曲げ部（７ｂ）とを交互に備えており、前記山形状の係止部（７）は、前記屈曲部（７ａ）から前記折曲げ部(７ｂ)への係止リングの上縁（Ｑ1）をテーパ状(Ｐ2Ｑ1)として、前記上縁（Ｑ1）を前記屈曲部（７ａ）の上端（Ｐ2）より低く設定しており、前記キャップ(１)を前記瓶口（５）に装着した時に、前記屈曲部（７ａ）の上端（Ｐ2） が、上記膨出部（６）の下周面（６ａ）に係止することにより、開栓時に係止リング４がすっぽ抜けしにくくなりタンパーエビデント性に関する信頼性が高くなる。また、折曲げ部７ｂの長さ（線分ＯＱ1 ）を制限し、これにより、キャップを瓶口に装着する際の拡径に要する応力が小さく押さえられ、ブリッジ切れによる装着不良を阻止することが出来る。
【００１５】
また、本発明の請求項２記載のキャップは、係止部を含む内筒の上縁部の平面投影長さがバンド部の内周長さおよび膨出部の外周長さよりも小さく設定されたことにより、開栓時に係止リング４がすっぽ抜けするのをより一層確実に阻止することが出来る。
【図面の簡単な説明】
【図１】本発明のキャップの一部縦断正面図である。
【図２】本発明のキャップの裏面図である。
【図３】本発明のキャップの要部の拡大図である。
【図４】本発明のキャップの要部の作用説明図である。
【図５】従来のキャップの一例を示す一部縦断正面図である。
【図６】従来のキャップの一例を示す要部の一部縦断正面図である。
【図７】従来のキャップの要部の縦断正面図である。
【図８】従来のキャップの要部の縦断正面図である。
【符号の説明】
１ キャップ
１ａ キャップ本体
２ 捩切り可能部（ブリッジ）
３ バンド部
４ 内筒（係止リング）
５ 瓶口
６ 膨出部
６ａ 下周面
６ａ1 外周縁部
７ 係止部
７ａ 屈曲部
７ｂ（ＯＱ1 ）折曲げ部
７ｍ 外方に屈曲した面
Ｏ 折り返し部
ＯＰ2 線分
ＯＰ1 線分
Ｐ2 屈曲部の上端
Ｒ2 線分
Ｑ1 Ｑ2 線分
Ｑ3 上縁部外側先端[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cap made of synthetic resin having a pilfer proof function fitted to a mouth portion of a liquid container.
[0002]
[Prior art]
As shown in FIGS. 5 to 8, a cylindrical band portion 3 is integrally formed from the lower end of the cap body 1 a via a twistable portion (bridge) 2, and is inclined from the lower end inner edge of the band portion 3. A plurality of mountain-shaped locking portions 7 that are locked to the lower peripheral surface 6a of the bulging portion 6 of the bottle mouth 5 are bent or bent on the truncated conical inner cylinder (locking ring) 4 The cap 1 formed by bending is known, for example, from Japanese Utility Model Laid-Open No. 4-74644.
[0003]
With such a configuration, when the cap main body 1a is screwed to open, the pill fur proof function is provided by a large number of mountain-shaped locking portions 7 that are locked to the lower peripheral surface 6a of the bulging portion 6 of the bottle mouth 5. Since the upper band of the provided band is prevented and the bridge 2 is broken, it is possible to detect that the band has been opened.
[0004]
These conventional techniques are roughly divided into two. That is, as shown in FIG. 7, the outer edge Q3 of the upper edge of the surface 7m bent outward is the highest, and the outer edge Q3 of the upper edge is the lower peripheral surface of the bulging portion 6 of the bottle mouth 5. The other is an A-type which is engaged with the outer peripheral edge 6a1 of 6a, and the other is, as shown in FIG. This is a B system in which the upper end of the bent portion 7 a is locked to the lower peripheral surface 6 a of the bulging portion 6.
[0005]
[Problems to be solved by the invention]
However, in the method A, the diameter of the imaginary circle formed by the upper end of the outer bent portion 7b that is bent outward is as large as the diameter of the bulged portion, so that it is completely removed when the plug is opened. In spite of opening, the bridge may not be broken.
Further, in the B method shown in FIG. 8, unlike the A method, the diameter of the imaginary circle formed by the upper end of the bent portion 7a inside the locking ring 4 is smaller than the diameter of the bulging portion. On the other hand, when the cap is attached to the bottle mouth, the locking ring expands in diameter and becomes circular in cross section, and gets over the bulging part (engagement step part) 6 of the bottle mouth. Since the stress required for the expansion at that time becomes large corresponding to the length of the line segment OQ of the bent portion 7b on the outside, a relatively large stress is generated, so that the twistable portion (bridge) 2 is formed. It becomes easy to cut, and there is a possibility that defective mounting will occur.
[0006]
The present invention has been made in order to solve these problems, and the locking ring does not slip out upward when opening, and the stress applied to the bridge is limited when the bottle is attached to the bridge. Aim to provide no cap.
[0007]
The present invention includes a cylindrical band portion (3) integrally formed via twisted-away possible portion from the lower end of the cap body (1a) and (2), 截 head cone from the inner edge of the lower end of the band portion (3) A shaped locking ring (4) is erected upward and inward, and the upper end of the locking ring (4) is the lower peripheral surface (6a) of the bulging portion (6) of the bottle mouth (5) ) in the cap has a large number of chevron-shaped engagement portion for engaging (7), the locking ring (4) is, the bent portion of the inward and (7a), the bent portion of the outward (7b) are alternately provided, and the mountain-shaped locking portion (7) has an upper edge (Q 1 ) of the locking ring from the bent portion (7a) to the bent portion (7b). As the taper shape (P 2 Q 1 ), the upper edge (Q 1 ) is set lower than the upper end (P 2 ) of the bent portion (7a), and the cap (1) is placed in the bottle mouth (5). Wearing The upper end (P 2 ) of the bent portion (7a) Is engaged with the lower peripheral surface (6a) of the bulging portion (6).
[0008]
In the present invention, it is preferable that the planar projection length of the upper edge portion of the inner cylinder including the locking portion is set smaller than the inner peripheral length of the band portion and the outer peripheral length of the bulging portion.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on examples with reference to the drawings. Parts that are the same as or equivalent to those of the prior art are denoted by the same reference numerals, and a part of the description is omitted. FIG. 1 is a partially longitudinal front view of a cap of the present invention, FIG. 2 is a rear view thereof, FIG. 3 is an enlarged view of a main part, and FIG. In the figure, reference numeral 1 denotes a cap having a pilfer proof function, 1a denotes a cap body, and a cylindrical band portion 3 is integrally formed through a twistable portion 2. Reference numeral 4 denotes a frusto-conical locking ring, which stands upright and inward from the lower end inner edge of the band portion 3. A number of mountain-shaped locking portions 7 are formed so as to converge at one point from the upper end to the lower end of the locking ring, and are locked to the lower peripheral surface 6 a of the bulging portion 6 of the bottle mouth 5. Is. The locking portion 7 includes a bent portion 7a, an outwardly bent surface 7m provided on both sides of the bent portion 7a, and a bent portion 7b outside the bent surface 7m. are [0010]
Based on FIG. 4, an effect is demonstrated. At the time of opening, the locking ring 4 rotates in the B direction with the folded portion O as a base point. The length of the line segment OP 2 of the bent portion 7a is larger by R 2 than the length R 1 when the bent portion is formed as in OP 1 in the conventional method (B method) shown in FIG. Therefore, when the locking ring 4 is tilted in the B direction, P 2 is positioned more centrally than P 1 . That is, the diameter of the virtual circle in which the upper end P 2 of the bent portions 7a are formed is smaller than the diameter of the virtual circle to form the P 1. Therefore, the locking ring 4 is not easily pulled out when the plug is opened, and the tamper evidence is highly reliable.
[0011]
On the other hand, as in the conventional B system shown in FIG. 8, if the upper edge of the surface 7m bent outward from the bent portion 7a is formed horizontally like P 2 Q 2 , it is completely removed. The effect is almost the same as that of the present invention. However, in this case, when the cap is attached to the bottle mouth, the locking ring 4 is elastically expanded in diameter and cross-sectionally rounded to get over the bulging portion (engaging step) 6 of the bottle mouth. Since the stress required for expanding the diameter is increased by the amount of the line segment Q 1 Q 2 , the force applied to the twistable portion (bridge) 2 is increased correspondingly, and the bridge is easily cut. Therefore, in the present invention, the upper end of the bent portion 7a is positioned higher than the portion bent outward from the bent portion, and the upper edge of the surface 7m bent outward from the bent portion 7a is tapered like P 2 Q 1. As a shape, the position of Q 1 is set low, and the length (line segment OQ 1 ) of the bent portion 7b is limited, so that the stress required for expanding the diameter when the cap is attached to the bottle mouth can be kept small. The bridge is not broken.
[0012]
Furthermore, in the present invention, it is preferable to set the planar projection length of the upper edge portion of the inner cylinder including the locking portion to be smaller than the inner peripheral length of the band portion and the outer peripheral length of the bulging portion.
In the embodiment, the inner diameter of the band portion 3 of the cap is set to 30.0 mm, and the length of the upper edge portion of the locking ring 4 is set to 84.0 mm in plan view. Accordingly, the upper edge of the locking ring 4 becomes a perfect circle when the diameter is expanded to 84.0 ÷ π = 26.74. At this time, since the mountain-shaped locking portion 7 of the locking ring 4 is formed to converge at one point from the upper end to the lower end of the locking ring 4, the locking ring 4 moves from the lower end to the upper end. The diameter is expanded uniformly, and the shape is completely a truncated cone. If the maximum outer diameter of the bulging portion (engagement step portion) 6 of the bottle mouth is 29.0 mm, the upper edge of the locking ring is further (29.0−26.74) × π = 7 mm. It is stretched in the circumferential direction and gets over the engaging step 6. Therefore, if the setting is made as described above, the locking ring 4 is less likely to come off at the time of opening, and the tamper evidence reliability is further increased.
[0013]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
[0014]
In the cap according to claim 1 of the present invention, a cylindrical band portion (3) is integrally formed from the lower end of the cap body (1a) via a twistable portion (2), and the band portion (3). 截 from the inner edge of the lower end head conical locking ring (4) is erected inclined upwardly and inwardly of, the upper end of the locking ring (4) is bulged portion of the bottle mouth (5) (6 ) Having a large number of mountain-shaped locking portions (7) locked to the lower peripheral surface (6a), the locking ring (4) includes an inwardly bent portion (7a), Folding portions (7b) outwardly are provided alternately, and the mountain-shaped locking portions (7) are provided on the locking ring from the bent portions (7a) to the bent portions (7b). The upper edge (Q 1 ) is tapered (P 2 Q 1 ), the upper edge (Q 1 ) is set lower than the upper end (P 2 ) of the bent portion (7a), and the cap (1) is When attached to the bottle mouth (5), the upper end (P 2 ) of the bent portion (7a) However, by engaging with the lower peripheral surface (6a) of the bulging portion (6), the retaining ring 4 is less likely to come off when the cap is opened, and the tamper evidence is highly reliable. In addition, the length (line segment OQ 1 ) of the bent portion 7b is limited, so that the stress required for expanding the diameter when the cap is attached to the bottle mouth can be suppressed to a small extent, and improper mounting due to a bridge break can be prevented. I can do it.
[0015]
In the cap according to claim 2 of the present invention, the planar projection length of the upper edge portion of the inner cylinder including the locking portion is set smaller than the inner peripheral length of the band portion and the outer peripheral length of the bulging portion. As a result, it is possible to more reliably prevent the locking ring 4 from slipping out when opening.
[Brief description of the drawings]
FIG. 1 is a partially longitudinal front view of a cap of the present invention.
FIG. 2 is a rear view of the cap of the present invention.
FIG. 3 is an enlarged view of a main part of the cap of the present invention.
FIG. 4 is an operation explanatory diagram of a main part of the cap of the present invention.
FIG. 5 is a partially longitudinal front view showing an example of a conventional cap.
FIG. 6 is a partially longitudinal front view of a main part showing an example of a conventional cap.
FIG. 7 is a longitudinal front view of a main part of a conventional cap.
FIG. 8 is a longitudinal front view of a main part of a conventional cap.
[Explanation of symbols]
1 Cap 1a Cap body 2 Twistable part (bridge)
3 Band part 4 Inner cylinder (locking ring)
5 bottle mouth 6 bulging portion 6a under peripheral surface 6a1 outer peripheral edge 7 engaging portion 7a bent portion 7b (OQ 1) bent portion surface is bent in 7m outward O folded portion OP 2 segment OP 1 line P 2 Upper end of bent part R 2 line segment Q 1 Q 2 line segment Q 3 Upper edge outside tip

Claims (2)

キャップ本体（１ａ）の下端より捩切り可能部（２）を介して円筒状のバンド部（３）を一体的に形成し、該バンド部（３）の下端内縁から截頭円錐形の係止リング（４）が上方及び内方に傾斜して立設され、前記係止リング（４）の上端は、瓶口（５）の膨出部（６）の下周面（６ａ）に係止する多数の山形状の係止部（７）を備えているキャップにおいて、
前記係止リング（４）が、内方への屈曲部（７ａ）と、外方への折曲げ部（７ｂ）とを交互に備えており、
前記山形状の係止部（７）は、前記屈曲部（７ａ）から前記折曲げ部(７ｂ)への係止リングの上縁（Ｑ1）をテーパ状(Ｐ2Ｑ1)として、前記上縁（Ｑ1）を前記屈曲部（７ａ）の上端（Ｐ2）より低く設定しており、
前記キャップ(１)を前記瓶口（５）に装着した時に、前記屈曲部（７ａ）の上端（Ｐ2） が、上記膨出部（６）の下周面（６ａ）に係止することを特徴とするキャップ。Integrally forming a cylindrical band portion (3) via a twisted-away possible portion from the lower end of the cap body (1a) (2), locking the 截 head conical from the inner edge of the lower end of the band portion (3) The ring (4) is erected upward and inward, and the upper end of the locking ring (4) is locked to the lower peripheral surface (6a) of the bulging portion (6) of the bottle mouth (5) In a cap having a number of mountain-shaped locking portions (7) that
The locking ring (4) is, the bent portion of the inward and (7a), provided with bent portions of the outward and (7b) are alternately,
The mountain-shaped locking portion (7) has an upper edge (Q 1 ) of the locking ring from the bent portion (7a) to the bent portion (7b) as a tapered shape (P 2 Q 1 ). The upper edge (Q 1 ) is set lower than the upper end (P 2 ) of the bent portion (7a),
When the cap (1) is attached to the bottle mouth (5), the upper end (P 2 ) of the bent portion (7a) The cap is characterized by being engaged with the lower peripheral surface (6a) of the bulging portion (6). 係止部を含む係止リングの上縁部の平面投影長さが、バンド部の内周長さおよび膨出部の外周長さよりも小さく設定された請求項１記載のキャップ。  The cap according to claim 1, wherein the projected length of the upper edge portion of the locking ring including the locking portion is set smaller than the inner peripheral length of the band portion and the outer peripheral length of the bulging portion.
JP20088699A 1999-07-14 1999-07-14 cap Expired - Fee Related JP4467102B2 (en)

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JP5411750B2 (en) * 2010-03-11 2014-02-12 日本山村硝子株式会社 cap
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