JP3343169B2 - Plastic caps for plastic bottles - Google Patents
Plastic caps for plastic bottlesInfo
- Publication number
- JP3343169B2 JP3343169B2 JP19360094A JP19360094A JP3343169B2 JP 3343169 B2 JP3343169 B2 JP 3343169B2 JP 19360094 A JP19360094 A JP 19360094A JP 19360094 A JP19360094 A JP 19360094A JP 3343169 B2 JP3343169 B2 JP 3343169B2
- Authority
- JP
- Japan
- Prior art keywords
- bottle mouth
- tamper
- plastic
- bridge
- crown
- 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 - Lifetime
Links
Classifications
-
- 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
- B65D41/3442—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container
- B65D41/3447—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container the tamper element being integrally connected to the closure by means of bridges
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ボトル口に螺合して被
冠する被冠部と、該被冠部に、所定の剪断力を受けると
切れる複数のブリッジで連繋され、ボトル口の顎部に係
止するタンパーエビデントバンドと前記被冠部の天面内
側にインサイドプラグを突設したペットボトル用プラス
チックキャップに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crown portion which is screwed onto a bottle mouth and is covered with a plurality of bridges which are cut off when subjected to a predetermined shearing force. The present invention relates to a tamper-evident band to be locked to a jaw and a plastic cap for a PET bottle having an inside plug protruding inside a top surface of the crown.
【０００２】[0002]
【従来の技術】従来のこの種キャップは、金属製あるい
はポリプロピレン等の硬質プラスチック製であって、被
冠部の天面内側に、ボトル口上縁に密接させるためのポ
リエチレン等のプラスチック製の密閉用ライナーを設け
たものが一般的である。そして、図５に示したように、
ブリッジ５０・・・は、被冠部およびタンパーエビデン
トバンドとほぼ同じ厚みＡ２をもち、その厚みＡ２が幅
Ｂ２よりも長く形成されていた。また、従来の該キャッ
プにおける、いわゆるＬＢ角度（Ｌｅａｋ ａｎｄ Ｂ
ｒｅａｋ 角度；リークが始まってタンパーエビデント
バンドのブリッジが切れるまでのキャップ回転角度）
は、正の値であり、９０度以内になることを目標にして
いる。2. Description of the Related Art A conventional cap of this kind is made of a metal or a hard plastic such as a polypropylene, and is provided on the inner side of the top surface of a crown portion for sealing with a plastic such as a polyethylene for tightly contacting an upper edge of a bottle mouth. It is common to provide a liner. And, as shown in FIG.
The bridges 50 have substantially the same thickness A2 as the crown portion and the tamper-evident band, and the thickness A2 is longer than the width B2. In addition, a so-called LB angle (Leak and B
leak angle; cap rotation angle from the beginning of the leak until the bridge of the tamper-evident band breaks)
Is a positive value and aims to be within 90 degrees.
【０００３】[0003]
【発明が解決しようとする課題】上記各従来例は、開栓
時、すなわち螺合を解く方向に被冠部を回転させた時、
ブリッジが切れる前にリークが始まるため、内部を真空
にした、いわゆる真空物では、外観上閉栓状態であるに
もかかわらずリークが起きて内容物が腐る危険性がある
という問題点があった。In each of the above-mentioned conventional examples, when the cap is opened, that is, when the crown is rotated in the direction to unscrew,
Since the leak starts before the bridge is broken, there is a problem in that a so-called vacuum object in which the inside is evacuated, there is a risk that the contents may be rotten due to the leak even though the appearance is closed.
【０００４】本発明は、ブリッジが切れる前にはリーク
が始まらない、上記ＬＢ角度が負の値となるペットボト
ル用プラスチックキャップを提供することを目的とす
る。An object of the present invention is to provide a plastic cap for a PET bottle in which the LB angle has a negative value, in which the leak does not start before the bridge is broken.
【０００５】[0005]
【課題を解決するための手段】本発明は、上記目的を達
成するために例えば、ボトル口２に螺合状態で被冠する
被冠部３と、ボトル口２の顎部２ａに係止するタンパー
エビデントバンド４と、前記被冠部３および前記タンパ
ーエビデントバンド４を連繋した複数のブリッジ５・・
・と、前記被冠部３の天面内側に突設し、ボトル口内側
に嵌合してボトル口２内面に密接するインサイドプラグ
６とを備え、かつ前記各部をプラスチックで構成し、ま
た、前記ブリッジ５・・・は、その厚みＡ１を被冠部３
およびタンパーエビデントバンド４より十分に薄く形成
するとともに、その幅Ｂ１をその厚みＡ１より長く形成
し、かつ、その数を所定以上の剪断力を受けて始めて切
れるように設定する。本発明者らの実験によれば、前記
幅Ｂ１を前記厚みＡ１より長くなるように、該厚みＡ１
は０．３〜０．６ｍｍ、該幅Ｂ１は０．３５〜０．７ｍ
ｍの範囲から選択するとともに、ブリッジ５・・・の数
を２０〜４０個に設定すると、所定以上の剪断力を受け
て始めて切れるものである。インサイドプラグ６は、被
冠部３が所定角度回転してブリッジ５・・・が切れるま
でボトル口２内面に密接した状態を保持する立ち上がり
長さに設定した。In order to achieve the above object, the present invention, for example, locks a crown portion 3 which is screwed onto a bottle mouth 2 and a jaw portion 2a of the bottle mouth 2. A tamper-evidence band 4 and a plurality of bridges 5 linking the crowned portion 3 and the tamper-evidence band 4.
And an inside plug 6 which protrudes from the top surface of the crowned portion 3 and is fitted to the inside of the bottle mouth to be in close contact with the inside surface of the bottle mouth 2. The bridges 5...
In addition, the band is formed so as to be sufficiently thinner than the tamper-evidence band 4, the width B1 is formed longer than the thickness A1, and the number thereof is set so as to be cut only after receiving a predetermined or more shearing force. According to the experiment of the present inventors, the thickness A1 is set so that the width B1 is longer than the thickness A1.
Is 0.3 to 0.6 mm, and the width B1 is 0.35 to 0.7 m
When the number of bridges 5 is selected from the range of m and the number of bridges 5 is set to 20 to 40, the bridges 5 are cut only after receiving a predetermined or more shearing force. The inside plug 6 is set to have a rising length that maintains a state in which it is kept in close contact with the inner surface of the bottle mouth 2 until the crown portion 3 rotates a predetermined angle and the bridges 5.
【０００６】[0006]
【作用】上記キャップ１は、開栓に際して被冠部３を握
り螺合を解く方向に回転させると、タンパーエビデント
バンド４がボトル口２の顎部２ａに係止固定しているの
で、ブリッジ５・・・が剪断力を受けて切れる。切れた
後もそのまま同回転を続けると、インサイドプラグ６が
ボトル口２から抜けリークが起こり、さらに同回転を続
けると被冠部３をボトル口２から取り外すことができ
る。When the cap 1 is gripped and rotated in the direction of unscrewing when the cap 1 is opened, the tamper-evident band 4 is locked and fixed to the jaw 2a of the bottle opening 2, so that the cap 1 is closed. 5 are cut off under shearing force. If the same rotation is continued after the cut, the inside plug 6 comes out of the bottle mouth 2 and a leak occurs. If the same rotation is further continued, the crowned portion 3 can be removed from the bottle mouth 2.
【０００７】以上のように、本発明は、開封時前記ＬＢ
角度が負の値となるので、ブリッジ５・・・が切れる
前、すなわち開封前にリークが起こらない。As described above, according to the present invention, when the LB is opened,
Since the angle has a negative value, no leak occurs before the bridge 5... Is cut, that is, before opening.
【０００８】[0008]
【実施例】以下に、本発明の好適な実施例を添付図面に
基づいて詳細に説明する。ここにおいて、添付図面の図
１は正面図、図２は開栓前の状態を示す部分拡大縦断端
面図、図３は開栓途中の状態を示す部分拡大縦断端面
図、図４はブリッジ部分の拡大横断端面図である。Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Here, FIG. 1 of the accompanying drawings is a front view, FIG. 2 is a partially enlarged longitudinal end view showing a state before opening, FIG. 3 is a partially enlarged longitudinal end view showing a state during opening, and FIG. It is an expanded cross-sectional end view.
【０００９】図１〜図３に示したように、ポリエチレン
で構成されたキャップ１は、ボトル口２に螺合状態で被
冠する被冠部３と、ボトル口２の顎部２ａに係止するタ
ンパーエビデントバンド４と、前記被冠部３および前記
タンパーエビデントバンド４を連繋した複数のブリッジ
５・・・と、前記被冠部３の天面内側に突設し、ボトル
口２内側に嵌合してボトル口２内面に密接するインサイ
ドプラグ６とを備えている。As shown in FIGS. 1 to 3, a cap 1 made of polyethylene is locked to a crown portion 3 which is screwed onto a bottle mouth 2 and a jaw 2 a of the bottle mouth 2. A tamper-evidence band 4, a plurality of bridges 5 connecting the crowned portion 3 and the tamper-evidence band 4, and projecting from the top surface inside the crowned portion 3, And an inside plug 6 that fits closely with the inner surface of the bottle mouth 2.
【００１０】前記被冠部３は、外周に、縦方向に伸びる
滑り止め用の多数のローレット７を形成し、また内周に
は、ボトル口２の雄螺旋２ｂに螺合する雌螺旋３ｂを形
成する。On the outer periphery of the crowned portion 3, a number of knurls 7 for preventing slippage extending in the vertical direction are formed. On the inner periphery, a female spiral 3b screwed to the male spiral 2b of the bottle mouth 2 is formed. Form.
【００１１】前記タンパーエビデントバンド４は、ボト
ル口２の顎部２ａに係止するような内形を有し、開栓後
はボトル口２に残留する。なお、このタンパーエビデン
トバンド４に縦スコアを設けて、開栓時に縦スコアが破
断されるよう構成し、開栓後は前記タンパーエビデント
バンド４がボトル口２に残留しないように構成してもよ
い。The tamper-evident band 4 has an inner shape to be engaged with the jaw 2a of the bottle mouth 2, and remains in the bottle mouth 2 after opening. The tamper-evident band 4 is provided with a vertical score so that the vertical score is broken when the tamper-evident band 4 is opened, and the tamper-evident band 4 is configured not to remain in the bottle mouth 2 after opening. Is also good.
【００１２】前記ブリッジ５・・・は、射出成型機から
取り出した未完成品において、被冠部３とタンパーエビ
デントバンド４間の連繋部分を穿孔装置でミシン目状に
多数の透孔８・・・を穿設することによって形成するも
のである。該連繋部分は、外周に凹条５ａを設けること
によって、被冠部３およびタンパーエビデントバンド４
の厚みより十分に薄く構成し、形成されたブリッジ５・
・・は、図４に示したように、それぞれ幅Ｂ１を厚みＡ
１より長くするとともに、その数を、手で被冠部３を螺
合を解く方向に回転することによって所定以上の剪断力
を受けて始めて切れるように設定するものである。より
具体的には、前記幅Ｂ１を前記厚みＡ１より長くなるよ
うに、該厚みＡ１は０．３〜０．６ｍｍ、該幅Ｂ１は
０．３５〜０．７ｍｍの範囲から選択するとともに、ブ
リッジ５・・・の数を２０〜４０個に設定すると、所定
以上の剪断力を受けて始めて切れることが実験的に確認
された。なお、プラスチックは、幅の狭いブリッジ５・
・・の前記穿孔作業に困難さを有するものであるが、こ
のように連繋部分の厚みを薄くすれば、幅の広いブリッ
ジ５・・・が形成できるので容易に穿孔し得るものとな
り、かつ該穿孔作業も容易なものとなる。The bridges 5... Are unfinished products taken out of an injection molding machine. In the unfinished product taken out of the injection molding machine, the connecting portion between the crowned portion 3 and the tamper-evident band 4 is perforated with a large number of perforated holes 8. .. formed by drilling The connecting portion is provided with a concave strip 5a on the outer periphery, so that the crowned portion 3 and the tamper-evident band 4 are provided.
The bridge 5 is formed sufficiently thinner than the thickness of the bridge 5.
.., As shown in FIG.
The length is set to be longer than 1 and the number is set such that the crown 3 is cut only after receiving a predetermined or more shearing force by manually rotating the crowned portion 3 in a direction of unscrewing. More specifically, the thickness A1 is selected from the range of 0.3 to 0.6 mm and the width B1 is selected from the range of 0.35 to 0.7 mm so that the width B1 is longer than the thickness A1. When the number of 5 ... was set to 20 to 40, it was experimentally confirmed that cutting was started only after receiving a predetermined or more shearing force. Plastic is a narrow bridge 5.
.. Has difficulty in the perforation work, but if the thickness of the connecting portion is reduced in this way, a wide bridge 5 can be formed, so that perforation can be easily performed, and Drilling work is also easy.
【００１３】図２および図３に示したように、前記イン
サイドプラグ６は、その外周に突部６ａを設けてあり、
ボトル口２内側に嵌合するように構成されている。前記
突部６ａはポリエチレン製であるので、該嵌合状態にお
いて、ボトル口２内面に当接して潰れた状態となり、ボ
トル内を外部に対して確実に密閉する。また、該インサ
イドプラグ６は、ブリッジ５・・・が切れ開栓が明示さ
れるまで、ボトル口２内面に密接した状態、すなわち前
記突部６ａが潰れてボトル口２内面に密着した状態を保
持する程度の立ち上がり長さに設定してあり、いわゆる
ＬＢ角度が従来とは異なり負の値となる。As shown in FIGS. 2 and 3, the inside plug 6 has a projection 6a on its outer periphery.
It is configured to fit inside the bottle opening 2. Since the protrusion 6a is made of polyethylene, in the fitted state, the protrusion 6a comes into contact with the inner surface of the bottle mouth 2 and is crushed, thereby securely sealing the inside of the bottle from the outside. The inside plug 6 maintains a state in which it is in close contact with the inner surface of the bottle mouth 2, that is, a state in which the protruding portion 6 a is crushed and is in close contact with the inner surface of the bottle mouth 2 until the bridge 5... The so-called LB angle has a negative value unlike the conventional case.
【００１４】次に、上記キャップ１の開栓動作について
説明する。先ず、被冠部３を握り螺合を解く方向に強く
回転させると、タンパーエビデントバンド４がボトル口
２の顎部２ａに係止しているので、ブリッジ５・・・が
剪断力を受けて切れる。切れた後もそのまま同回転を続
けると、インサイドプラグ６がボトル口２から抜けリー
クが起こり、さらに同回転を続けると被冠部３をボトル
口２から取り外すことができる。Next, the opening operation of the cap 1 will be described. First, when the crown 3 is gripped and strongly rotated in the direction of unscrewing, the tamper-evident band 4 is locked to the jaw 2a of the bottle mouth 2, so that the bridges 5. Cut off. If the same rotation is continued after the cut, the inside plug 6 comes out of the bottle mouth 2 and a leak occurs. If the same rotation is further continued, the crowned portion 3 can be removed from the bottle mouth 2.
【００１５】そして、上記キャップ１は、ブリッジ５・
・・の厚みが薄いので、その穿孔加工が容易であるとい
う利点がある。また、いわゆるＬＢ角度が負の値とな
り、開栓時、ブリッジ５・・・が切れる前にはリークが
起こらないから、外観上未開栓状態で内容物が腐る危険
性がなく、内容物の品質を確実に維持できるという利点
がある。The cap 1 is connected to a bridge 5.
.. Has an advantage that the perforation process is easy because the thickness is small. In addition, since the so-called LB angle becomes a negative value and no leak occurs before the bridge 5 breaks at the time of opening, there is no danger of the contents being rotten in an unopened state in appearance, and the quality of the contents. There is an advantage that can be reliably maintained.
【００１６】なお、本発明は、上記実施例になんら限定
されるものではなく、例えば、ブリッジ５・・・を設け
るための、未完成品における、被冠部３とタンパーエビ
デントバンド４間の連繋部分に設けた凹条５ａは、その
外周にではなく、その内周に設けてもよい。また、プラ
スチックはポリエチレンに代えて他のものを用いてもよ
い。The present invention is not limited to the above embodiment. For example, the crown 3 and the tamper shrimp in the unfinished product for providing the bridges 5... The concave stripes 5a provided at the connecting portion between the dent bands 4 may be provided not on the outer periphery but on the inner periphery. Further, other plastics may be used in place of polyethylene.
【００１７】[0017]
【発明の効果】以上のように、本発明は、開栓時ブリッ
ジが切れる前にはリークが起こらないから、外観上未開
栓状態で内容物が腐る危険性がなく、内容物の品質を確
実に維持できるという効果を奏する。As described above, according to the present invention, since the leak does not occur before the bridge breaks at the time of opening, there is no danger of the contents being rotten in the unopened state, and the quality of the contents is ensured. The effect is that it can be maintained.
【図１】正面図。FIG. 1 is a front view.
【図２】開栓前の状態を示す部分拡大縦断端面図。FIG. 2 is a partially enlarged longitudinal sectional end view showing a state before opening.
【図３】開栓後の状態を示す部分拡大縦断端面図。FIG. 3 is a partially enlarged longitudinal sectional end view showing a state after opening.
【図４】ブリッジ部分の拡大横断端面図。FIG. 4 is an enlarged cross-sectional end view of a bridge portion.
【図５】従来のペットボトル用プラスチックキャップに
おけるブリッジ部分の拡大横断端面図。FIG. 5 is an enlarged cross-sectional end view of a bridge portion in a conventional plastic cap for plastic bottles.
１ キャップ ２ ボトル口 ２ａ 顎部 ３ 被冠部 ４ タンパーエビデントバンド ５，５０ ブリッジ ６ インサイドプラグ ６ａ 突部 Ａ１，Ａ２ 厚み Ｂ１，Ｂ２ 幅 DESCRIPTION OF SYMBOLS 1 Cap 2 Bottle mouth 2a Jaw part 3 Covered part 4 Tamper evidence band 5,50 Bridge 6 Inside plug 6a Projection A1, A2 Thickness B1, B2 Width
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭55−154255（ＪＰ，Ａ) 実開 昭53−119238（ＪＰ，Ｕ) 実開 平６−47150（ＪＰ，Ｕ) 実開 平５−58655（ＪＰ，Ｕ) 特表 平６−500519（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B65D 41/34 ──────────────────────────────────────────────────続 き Continued from the front page (56) References JP-A-55-154255 (JP, A) JP-A-53-119238 (JP, U) JP-A-6-47150 (JP, U) JP-A-5-119 58655 (JP, U) Table 6-500519 (JP, A) (58) Fields surveyed (Int. Cl. 7 , DB name) B65D 41/34
Claims (1)
と、ボトル口の顎部に係止するタンパーエビデントバン
ドと、前記被冠部および前記タンパーエビデントバンド
を連繋した複数のブリッジと、前記被冠部の天面内側に
突設し、ボトル口内側に嵌合してボトル口内面に密接す
るインサイドプラグとを備えたペットボトル用プラスチ
ックキャップであって、前記各部をプラスチックで一体
的に構成し、また、前記各ブリッジは、その厚みを被冠
部およびタンパーエビデントバンドより十分に薄く形成
するとともに、その幅をその厚みより長く形成し、か
つ、その数を所定以上の剪断力を受けて始めて切れるよ
うに設定する一方、インサイドプラグは、被冠部が所定
角度回転してブリッジが切れるまでボトル口内面に密接
した状態を保持する立ち上がり長さに設定したことを特
徴とするペットボトル用プラスチックキャップ。1. A crown portion which is screwed onto a bottle mouth, a tamper-evident band which is engaged with a jaw of the bottle mouth, and a plurality of the tamper-evident bands which are connected to the crown portion and the tamper-evidence band. A plastic cap for a PET bottle, comprising: a bridge; and an inside plug protruding inside the top surface of the crowned portion, fitted into the inside of the bottle mouth, and in close contact with the inside surface of the bottle mouth, wherein each part is made of plastic. Each bridge is formed so as to have a thickness sufficiently smaller than the crown portion and the tamper-evident band, and a width longer than the thickness.
While the number is set so as to be cut only after receiving a predetermined shearing force, the inside plug has a rising length that keeps the state close to the inner surface of the bottle mouth until the crown is rotated by a predetermined angle and the bridge is cut. A plastic cap for plastic bottles, characterized by being set to the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19360094A JP3343169B2 (en) | 1994-07-26 | 1994-07-26 | Plastic caps for plastic bottles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19360094A JP3343169B2 (en) | 1994-07-26 | 1994-07-26 | Plastic caps for plastic bottles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0840447A JPH0840447A (en) | 1996-02-13 |
| JP3343169B2 true JP3343169B2 (en) | 2002-11-11 |
Family
ID=16310650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19360094A Expired - Lifetime JP3343169B2 (en) | 1994-07-26 | 1994-07-26 | Plastic caps for plastic bottles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3343169B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19827242A1 (en) * | 1998-06-18 | 1999-12-30 | Mouldtec Kunststoff Gmbh | Sealing cap, in particular screw cap made of plastic with a guarantee band |
-
1994
- 1994-07-26 JP JP19360094A patent/JP3343169B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0840447A (en) | 1996-02-13 |
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