JP4869518B2

JP4869518B2 - Separation collection stopper

Info

Publication number: JP4869518B2
Application number: JP2001265705A
Authority: JP
Inventors: 宮田　　由弘
Original assignee: Mikasa Sangyo Co Ltd
Current assignee: Mikasa Sangyo Co Ltd
Priority date: 2001-09-03
Filing date: 2001-09-03
Publication date: 2012-02-08
Anticipated expiration: 2021-09-03
Also published as: JP2003072806A

Description

【０００１】
【発明の属する技術分野】
この発明は、瓶口に打栓装着される中栓に関するものであり、特に、シール性及び分別回収性に優れた中栓に関するものである。
【０００２】
【従来の技術】
従来のポリエチレンテレフタレート（ペット）ボトル（ＰＥＴＢＯＴＴＯＬＥ）等の合成樹脂製瓶容器の瓶口には、合成樹脂製の中栓が装着されている。この中栓は、瓶容器に内容物を充填した後、打栓装置により瓶口に打栓装着され、その天面は上壁内面に当接し、該瓶口は外筒及び内筒により挟持され、瓶口の環状突起は外筒の係合部に係止する（特開平１１−３４９０２２号参照）。
【０００３】
分別回収の際には、中栓の外筒に設けたタブを所定方向に引っ張って縦弱化線及び周方向スコアを引き裂き、環状突起と係合部との係止力を弱めながら中栓を瓶口から外す。
【０００４】
【発明が解決しようとする課題】
従来例の中栓は、次の様な問題がある。
（１）打栓を円滑に行うため、外筒上部の内径は瓶口の外径より大きく形成され、又、瓶口との密着性をよくするため、内筒外径は瓶口内径よりも大きく形成されている。そのため、高温充填時に打栓し、内筒が瓶口内に入り込むと、熱が加わって変形しやすくなっている瓶口を外筒側に押圧するので、瓶口上端部は、逆八の字状に拡がってしまう。そうすると、内筒と瓶口との間に間隙が発生し、シール漏れを起こす。
（２）タブが外方へ突出しているため、打栓行程で中栓が相互に絡み合ったり、シュータに引っかかって打栓機に中栓を円滑に供給することができない。
（３）打栓行程における上記（２）の問題を解決するため、タブを上壁より上方へ立設した中栓では、指でタブを掴もうとしても、タブの背面側の空間が小さいので掴みにくい。そのため、タブを固くしっかりと掴んで引っ張ることが困難であるので、瓶口から中栓を外すのに時間がかかり、能率良く分別回収作業を行うことができない。
【０００５】
この発明は、シール漏れを防止することを目的とする。他の目的は、分別回収を能率良く行いことである。
【０００６】
この発明は、外筒と、該外筒の内側に設けられた内筒と、前記両筒を連結する上壁と、を備え、該外筒上部の内径は瓶口の外径よりも大きく形成され、該内筒の外径は該瓶口の内径よりも大きく形成された中栓であって：前記外筒内面と上壁内面との交差部に、高温充填時に、該瓶口が拡がるのを防止する面取り肉部を設けたことを特徴とする。
【０００８】
この発明は、外筒と、該外筒の内側に設けられた内筒と、前記両筒を連結する上壁と、を備え、該外筒上部の内径は瓶口の外径よりも大きく形成され、該内筒の外径は該瓶口の内径よりも大きく形成された中栓であって：前記外筒内面と上壁内面との交差部に、高温充填時に、該瓶口が拡がるのを防止する面取り肉部を設け、該面取り肉部の下方に、円周方向スコアを設けたことを特徴とする。
【０００９】
この発明は、外筒と、該外筒の内側に設けられた内筒と、前記両筒を連結する上壁と、を備え、該外筒上部の内径は瓶口の外径よりも大きく形成され、該内筒の外径は該瓶口の内径よりも大きく形成された中栓であって：前記外筒内面と上壁内面との交差部に、高温充填時に、該瓶口が拡がるのを防止する面取り肉部を設け、前記外筒上部に段状部を形成し、該段状部の小径筒側に円周方向スコアを設け、該段状部の大径筒の延長外周面上にタブを設け、前記小径筒の、該タブの背面に対応する部分に凹部を形成したことを特徴とする。
【００１０】
【発明の実施の形態】
この発明は、外筒内面と上壁内面との交差部に、瓶口上端部を抑える変形規制手段を設け、特に高温充填時の瓶口上端部の変形を防止することにより、シール漏れが発生しないようにする。
【００１１】
この変形規制手段として、面取り肉部を用いると、打栓時に瓶口を設計位置に案内できるので、円滑に中栓の装着を行うことができる。
【００１２】
この発明は、外筒上部に段状部を形成し、該段状部の小径筒側に円周方向スコアを設け、該段状部の大径筒の延長外周面上にタブを設け、前記小径筒の、該タブの背面に対応する部分に凹部を形成し、タブ背面の空間を大きくすることにより、タブが外方へ突出せず、かつ、タブを指で確実に掴める様にする。
【００１３】
【実施例】
この発明の第１実施例を図１〜図３により説明する。
合成樹脂製の中栓１は、ヒンジ２０を介して上蓋２５に連結されている。中栓１は、外筒２と、外筒２の内側に設けられた内筒３と、前記両筒２，３を連結する上壁４と、を備えている。
【００１４】
外筒２の内面２ｆと上壁４の内面４ｆとの交差部６には、テーパ状の面取り肉部１０が形成されている。この面取り肉部1０の内面１０ｆは、中栓１の中心線１ｃに平行で、且つ、面取り肉部１０の上端ａを通る線（以下、垂線という）１０ｃに対し、角度θ傾斜している。この角度θは、１５度〜３０度の範囲内で適宜選択される。角度θが１５度より小さいと中栓の瓶口への打栓が円滑に行われなくなる。角度θが３０度より大きいと瓶口上端部の変形規制作用が弱まり、シール性が低下する。特に、角度θとして１８度〜２４度が好適である。
【００１５】
この面取り肉部１０の上端10aは、瓶口５の直筒状の上端部５ａの外径ｄ１と一致、又は、ほぼ一致し、該上端部５ａの外周端縁５ｂは前記上端１０ａに当接している。
【００１６】
外筒２の内面２ｆには、円周方向スコア１１と係合部１２とが設けられている。該スコア１１は面取り肉部１０の下方に設けられ、外筒上部２ａの肉厚部に形成した縦溝１３と対向している。従って、縦溝１３と前記スコア１１間の肉厚は、切れやすい程度の厚さになっている。この様に、縦溝１３に対向させて該スコア１１を形成すると、縦溝１３が無い場合に比べ、該スコアの位置を浅くすることができるので、金型を用いて中栓を形成する際に、脱型が容易となる。
【００１７】
外筒内面２ｆの円周方向スコア１１と係合部１２との間には、環状突起８と当接する重なり代１４を設け、シール効果の向上を図っている。
【００１８】
内筒内面３ｆには、瓶口５の内面と当接するオーバーラップ１５を設け、シール効果の向上を図っている。
【００１９】
図１〜図３において、１６は上蓋２５の係止リング、１７は注出口、１８はプルリング、１９は遮断壁、をそれぞれ示す。
【００２０】
次に、本実施例の作動について説明する。
瓶容器、例えば、ポリエチレンテレフタレート（ペット）ボトル（ＰＥＴＢＯＴＴＬＥ）に殺菌のため高温に加熱されたつゆ類等の内容物を充填した後、上蓋２５を閉じた状態の中栓１を図示しない打栓装置により瓶口５に打栓装着する。
【００２１】
瓶口５の上端部5aは面取り肉部１０の内面１０ｆに案内されながら上壁内面４ｆに接近し、瓶口５の天面２ｂは該上壁内面４ｆに当接すると共に、その外周端縁５ｂは面取り肉部１０の上端１０ａに当接する。
【００２２】
この時、内筒３の外径は瓶口５の内径より大きく形成されているため、瓶口５の上端部5aは、内筒３の反力により外筒２側に押圧され、かつ、瓶口５は加熱により変形しやすくなっているが、瓶口５の外周端縁５ｂが面取り肉部１０の上端１０ａに当接しているので、その変形が抑えられる。そのため、瓶口５の内周面と内筒３の外周面とは、密着するので、シール漏れが発生することはない。
【００２３】
分別回収時には、上蓋２５を開いて手で握り、所定方向に引っ張ると、図示しない縦弱化線が引き裂かれると同時に円周方向スコア１１も引き裂かれ、環状突起と係合部との係合が緩む。そのため、中栓１は容易に瓶口５から外れる。
【００２４】
この発明の第２実施例を図４により説明する。
この実施例と第１実施例（図１〜図３）との相違は、面取り肉部１０の上端10aに直筒嵌合部２８を設けたことである。この直筒嵌合部２８の径ｄ2は、瓶口５の外径と同一、又は、ほぼ同一に形成され、その深さｔは必要に応じて適宜選択される。瓶口５の上端部5aは、直筒嵌合部２８に嵌着され、変形を規制される。
【００２５】
この発明の第３実施例を図５により説明する。
この実施例と第１実施例（図１〜図３）の相違は、外筒２の上部2aに段状部２９を設け、図示しない上蓋と中栓１とをねじ部３０で螺着した点である。
外筒２の段状部２９は、小径筒２９ａと大径筒２９ｂとにより形成され、該小径筒２９ａ側内面の面取り肉部１０の下方に円周方向スコア１１が設けられている。
【００２６】
この発明の第４実施例を図６により説明する。
この実施例と第１実施例（図１〜図３）の相違は、瓶口５の上端部外周面５ｃが円錐台状に形成され、該瓶口５の外周端縁５ｂのみならず外周面５ｃも面取り肉部１０の内面１０ｆに当接している点である。この実施例では、前記第１〜第３実施例より更に瓶口５の変形を抑えることができるので、シール効果は更に向上する。
【００２７】
この発明の第５実施例を図７により説明する。
この実施例と第３実施例（図５）の相違は、瓶口５の上端部外周面５ｃが円錐台状に形成され、該瓶口５の外周端縁５ｂのみならず外周面５ｃも面取り肉部１０の内面１０ｆに当接している点である。この実施例では、前記第１〜第３実施例より更に瓶口５の変形を抑えることができるので、シール効果は更に向上する。
【００２８】
この発明の第６実施例を図８〜図１１により説明する。
合成樹脂製の中栓１０１は、外筒１０２と、外筒１０２の内側に設けられた内筒１０３と、前記両筒１０２，１０３を連結する上壁１０４と、を備えている。
【００２９】
外筒１０２の内面１０２ｆと上壁１０４の内面１０４ｆとの交差部１０６には、面取り肉部１１０が形成されている。この面取り肉部１1０の内面１１０ｆは、中栓１０１の中心線１０１ｃに平行で、且つ、面取り肉部１１０の上端１１０ａを通る線（以下、垂線という）１１０ｃに対し、角度θ傾斜している。この角度θは、１５度〜３０度の範囲内で適宜選択されるが、特に、角度θとして１８度〜２４度が好適である。
【００３０】
この面取り肉部１１０の上端１1０aは、瓶口１０５の直筒状の上端部１０５ａの外径ｄ3と一致、又は、ほぼ一致し、該上端部１０５ａの外周端縁１０５ｂは前記上端１１０ａに当接している。
【００３１】
面取り肉部１１０の下方には、円周方向スコア１１１が設けられ、このスコア１１と係合部１１２との間には、環状突起１０８と当接する重なり代１１４が設けられている。この重なり代１１４は、シール効果を向上せしめるものである。
【００３２】
外筒１０２の上部102a外面には、段状部１２９が設けられている。
この段状部１２９は、小径筒１２９ａと大径筒１２９ｂとにより形成され、該小径筒１２９ａには、凹部１２０が設けられている。
この凹部１２０は、タブ１２１の背面に対応して形成されているが、その形状、深さ、形成範囲等は、必要に応じて適宜選択される。
【００３３】
このタブ１２１は、段状部１２９の大径筒１２９ｂの外周延長面上に設けられ、上壁１０４より上方に突出しているが、先細に形成され、先端部１２１ａ側になる程、小径筒１２９ａとの間隔は大きくなっている。なお、このタブ１２１は外筒の外側へ突出していないので、打栓行程で中栓が相互に絡み合ったりシュータに引っかかるというトラブルがない。前記タブ１２１の外面には、滑り止め１２２が設けられ、又、その一側は縦スリット（縦弱化部）１２３に連続している。この縦スリット１２３は、大径筒１２９ｂの下端近傍まで伸びている。
【００３４】
内筒１０３の外径は、瓶口１０５の内径より僅かに大きく形成されており、その外面には、瓶口１０５の内面と当接するオーバーラップ代が設けられている。
このオーバーラップ代は、シール効果を向上せしめるものである。
【００３５】
図８〜図１１において、１３０は上蓋１２５と中栓１０１のねじ部、１３１は注出口、１３２はプルリング、１３３は遮断壁、をそれぞれ示す。
【００３６】
次に、本実施例の作動について説明する。
瓶容器、例えば、ポリエチレンテレフタレート（ペット）ボトル（ＰＥＴＢＯＴＴＬＥ）に殺菌のために高温に加熱されたつゆ類等の液状の内容物を充填した後、予め上蓋１２５を螺着した中栓１０１を図示しない打栓装置により瓶口１０５に打栓装着する。
【００３７】
瓶口１０５の上端部１０5aは面取り肉部１１０の内面１１０ｆに案内されながら上壁内面１０４ｆに接近し、瓶口１０５の天面は該上壁内面１０４ｆに当接すると共に、その外周端縁１０５ｂは面取り肉部１１０の上端１１０ａに当接する。
【００３８】
この時、内筒１０３の外径は瓶口１０５の内径より大きく形成されているので、瓶口１０５の上端部１０5aは、内筒１０３の反力により外筒２側に押圧されるが、瓶口１０５の外周端縁１０５ｂが面取り肉部１１０の上端１１０ａに当接しているので、その変形が抑えられる。そのため、瓶口１０５の内周面と内筒１０３の外周面とは、常時密着するので、シール漏れが発生することはない。
【００３９】
分別回収時には、上蓋１２５を所定方向に回転させて中栓１０１から外し、タブ１２１を指で摘む。この時、タブ１２１の背面側に十分な空間が存在し、又、タブ１２１の外面には滑り止め１２２が設けられているので、しっかりとタブ１２１を掴むことができる。
【００４０】
このタブ１２１を所定方向に引っ張ると、縦スリット１２３（縦弱化線）が引き裂かれると同時に円周方向スコア１１１も引き裂かれ、環状突起１１８と係合部１１２との係合が緩む。そのため、中栓１は容易に瓶口５から外れる。
【００４１】
【発明の効果】
この発明は、外筒内面と上壁内面との交差部に、瓶口上端部の変形規制手段を設けたので、高温充填時においても瓶口が拡がるのを防止することができる。そのため、内筒と瓶口とは常に密着しているので、シール漏れすることはない。
【００４２】
この変形規制手段として、面取り肉部を用いると、打栓時に瓶口は面取り肉部の内面に案内されるので、打栓作業を円滑に行うことができる。
【００４３】
この発明は、外筒上部に段状部を形成し、該段状部の小径筒側に円周方向スコアを設け、該段状部の大径筒の延長外周面上にタブを設けたので、打栓行程で中栓が相互に絡み合ったり、シュータにひっかかることがない。又、前記小径筒の、該タブの背面に対応する部分に凹部を形成したので、従来例に比べてタブ背面の空間を大きくすることができる。そのため、該タブを指で確実に掴むことができるので、縦弱化線及び円周方向スコアを容易に引き裂くことが出来る。従って、分別回収作業を能率良く行うことができる。
【図面の簡単な説明】
【図１】本発明の第１実施例を示す図で、開蓋状態の平面図である。
【図２】図１のＡ-Ａ線断面の一部を示す図である。
【図３】図２の要部拡大図である。
【図４】本発明の第２実施例を示す縦断面図で、図３に対応する図である。
【図５】本発明の第３実施例を示す縦断面図で、図３に対応する図である。
【図６】本発明の第４実施例を示す縦断面図で、図３に対応する図である。
【図７】本発明の第５実施例を示す縦断面図で、図５に対応する図である。
【図８】本発明の第６実施例を示す正面である。
【図９】本発明の第６実施例を示す平面図である。
【図１０】本発明の第６実施例を示す縦断面図である。
【図１１】図１０の要部拡大図である。
【符号の説明】
１中栓
２外筒
２ａ外筒上部
３内筒
４上壁
５瓶口
６交差部
10 面取り肉部
１１円周方向スコア
１２１タブ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an inner stopper that is plugged into a bottle mouth, and particularly relates to an inner stopper that is excellent in sealability and separation and recovery.
[0002]
[Prior art]
A synthetic resin inner stopper is attached to a bottle mouth of a synthetic resin bottle container such as a conventional polyethylene terephthalate (PET) bottle (PET BOTOLE). The inner stopper is filled with the contents in the bottle container, and then the stopper is attached to the bottle mouth by a stoppering device. The top surface is in contact with the inner surface of the upper wall, and the bottle mouth is sandwiched between the outer cylinder and the inner cylinder. The annular protrusion of the bottle mouth is locked to the engaging portion of the outer cylinder (refer to JP-A-11-349022).
[0003]
When sorting and collecting, pull the tab provided on the outer tube of the inner plug in a predetermined direction to tear the longitudinal weakening line and the circumferential score, and bottle the inner plug while weakening the locking force between the annular protrusion and the engaging part. Remove from mouth.
[0004]
[Problems to be solved by the invention]
The conventional inner plug has the following problems.
(1) The inner diameter of the upper part of the outer cylinder is formed larger than the outer diameter of the bottle mouth in order to perform stoppering smoothly, and the outer diameter of the inner cylinder is larger than the inner diameter of the bottle mouth in order to improve the adhesion to the bottle mouth. Largely formed. Therefore, it is plugged at the time of high temperature filling, and when the inner cylinder enters the bottle mouth, the bottle mouth that is easily deformed due to heat is pressed against the outer cylinder, so the upper end of the bottle mouth is an inverted eight-letter shape. Will spread. As a result, a gap is generated between the inner cylinder and the bottle mouth, causing seal leakage.
(2) Since the tabs protrude outward, the inner plugs are entangled with each other in the plugging process, or cannot be smoothly supplied to the plugging machine by being caught by the shooter.
(3) In order to solve the above problem (2) in the plugging process, the inner plug with the tab standing upward from the upper wall has a small space on the back side of the tab, even if the tab is grasped with a finger. It is difficult to grasp. For this reason, it is difficult to grasp and pull the tab firmly and firmly, so it takes time to remove the inner stopper from the bottle mouth, and it is not possible to perform the separation and collection operation efficiently.
[0005]
An object of this invention is to prevent seal leakage. Another object is to efficiently carry out fractional collection.
[0006]
The present invention includes an outer cylinder, an inner cylinder provided inside the outer cylinder, and an upper wall connecting the both cylinders, and the inner diameter of the upper part of the outer cylinder is formed larger than the outer diameter of the bottle mouth The inner cylinder has an outer diameter that is larger than the inner diameter of the bottle mouth, and the bottle mouth expands at the intersection of the inner surface of the outer cylinder and the inner surface of the upper wall during high temperature filling. It is characterized in that a chamfered meat portion for preventing the above is provided.
[0008]
The present invention includes an outer cylinder, an inner cylinder provided inside the outer cylinder, and an upper wall connecting the both cylinders, and the inner diameter of the upper part of the outer cylinder is formed larger than the outer diameter of the bottle mouth The inner cylinder has an outer diameter that is larger than the inner diameter of the bottle mouth, and the bottle mouth expands at the intersection of the inner surface of the outer cylinder and the inner surface of the upper wall during high temperature filling. A chamfered meat portion for preventing the chamfering is provided, and a circumferential score is provided below the chamfered meat portion.
[0009]
The present invention includes an outer cylinder, an inner cylinder provided inside the outer cylinder, and an upper wall connecting the both cylinders, and the inner diameter of the upper part of the outer cylinder is formed larger than the outer diameter of the bottle mouth The inner cylinder has an outer diameter that is larger than the inner diameter of the bottle mouth, and the bottle mouth expands at the intersection of the inner surface of the outer cylinder and the inner surface of the upper wall during high temperature filling. On the extended outer peripheral surface of the large-diameter cylinder of the stepped portion. A tab is provided, and a concave portion is formed in a portion of the small-diameter cylinder corresponding to the back surface of the tab.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
This invention is provided with a deformation restricting means that suppresses the upper end of the bottle mouth at the intersection between the inner surface of the outer cylinder and the inner surface of the upper wall, and seal leakage occurs particularly by preventing deformation of the upper end of the bottle mouth during high temperature filling. Do not.
[0011]
When a chamfered meat portion is used as the deformation restricting means, the bottle mouth can be guided to the design position at the time of stoppering, so that the inner stopper can be smoothly attached.
[0012]
According to the present invention, a stepped portion is formed at the upper portion of the outer cylinder, a circumferential score is provided on the small diameter tube side of the stepped portion, a tab is provided on an extended outer peripheral surface of the large diameter tube of the stepped portion, A concave portion is formed in a portion of the small-diameter cylinder corresponding to the back surface of the tab, and the space on the back surface of the tab is increased so that the tab does not protrude outward and the tab can be securely grasped with a finger.
[0013]
【Example】
A first embodiment of the present invention will be described with reference to FIGS.
The inner plug 1 made of synthetic resin is connected to the upper lid 25 via a hinge 20. The inner plug 1 includes an outer cylinder 2, an inner cylinder 3 provided inside the outer cylinder 2, and an upper wall 4 that couples both the cylinders 2 and 3.
[0014]
A tapered chamfered portion 10 is formed at the intersection 6 between the inner surface 2 f of the outer cylinder 2 and the inner surface 4 f of the upper wall 4. An inner surface 10 f of the chamfered meat portion 10 is inclined by an angle θ with respect to a line 10 c that is parallel to the center line 1 c of the inner plug 1 and passes through the upper end a of the chamfered meat portion 10 (hereinafter referred to as a perpendicular). This angle θ is appropriately selected within the range of 15 degrees to 30 degrees. When the angle θ is less than 15 degrees, the stopper of the inner stopper to the bottle mouth cannot be smoothly performed. If the angle θ is larger than 30 degrees, the deformation restricting action at the upper end of the bottle mouth is weakened and the sealing performance is lowered. In particular, the angle θ is preferably 18 to 24 degrees.
[0015]
The upper end 10a of the chamfered meat portion 10 coincides with or substantially coincides with the outer diameter d1 of the straight cylindrical upper end portion 5a of the bottle mouth 5, and the outer peripheral edge 5b of the upper end portion 5a is in contact with the upper end 10a. Yes.
[0016]
A circumferential score 11 and an engaging portion 12 are provided on the inner surface 2 f of the outer cylinder 2. The score 11 is provided below the chamfered meat portion 10 and faces the vertical groove 13 formed in the thick portion of the outer cylinder upper portion 2a. Therefore, the thickness between the vertical groove 13 and the score 11 is a thickness that is easily cut. When the score 11 is formed so as to face the vertical groove 13 in this way, the position of the score can be made shallower than when the vertical groove 13 is not provided. Moreover, demolding becomes easy.
[0017]
Between the circumferential score 11 on the inner surface 2f of the outer cylinder and the engaging portion 12, an overlap margin 14 that contacts the annular protrusion 8 is provided to improve the sealing effect.
[0018]
The inner cylinder inner surface 3f is provided with an overlap 15 in contact with the inner surface of the bottle mouth 5 to improve the sealing effect.
[0019]
1 to 3, 16 is a locking ring of the upper lid 25, 17 is a spout, 18 is a pull ring, and 19 is a blocking wall.
[0020]
Next, the operation of this embodiment will be described.
A bottle container, for example, a polyethylene terephthalate (PET) bottle (PET BOTLE) is filled with contents such as soup heated at high temperature for sterilization, and then the stopper 1 (not shown) with the upper lid 25 closed is shown. A stopper is attached to the bottle mouth 5 by the apparatus.
[0021]
The upper end portion 5a of the bottle mouth 5 approaches the upper wall inner surface 4f while being guided by the inner surface 10f of the chamfered meat portion 10, and the top surface 2b of the bottle mouth 5 abuts against the upper wall inner surface 4f and the outer peripheral edge 5b thereof. Is in contact with the upper end 10 a of the chamfered meat portion 10.
[0022]
At this time, since the outer diameter of the inner cylinder 3 is formed larger than the inner diameter of the bottle mouth 5, the upper end portion 5a of the bottle mouth 5 is pressed toward the outer cylinder 2 by the reaction force of the inner cylinder 3, and the bottle The mouth 5 is easily deformed by heating, but since the outer peripheral edge 5b of the bottle mouth 5 is in contact with the upper end 10a of the chamfered meat portion 10, the deformation is suppressed. For this reason, the inner peripheral surface of the bottle mouth 5 and the outer peripheral surface of the inner cylinder 3 are in close contact with each other, so that no seal leakage occurs.
[0023]
When separating and collecting, when the upper lid 25 is opened, grasped by hand, and pulled in a predetermined direction, a longitudinal weakening line (not shown) is torn and at the same time the circumferential score 11 is also torn, and the engagement between the annular protrusion and the engaging portion is loosened. . Therefore, the inner stopper 1 can be easily removed from the bottle mouth 5.
[0024]
A second embodiment of the present invention will be described with reference to FIG.
The difference between this embodiment and the first embodiment (FIGS. 1 to 3) is that a straight tube fitting portion 28 is provided at the upper end 10 a of the chamfered meat portion 10. The diameter d2 of the straight tube fitting portion 28 is formed to be the same as or substantially the same as the outer diameter of the bottle mouth 5, and the depth t is appropriately selected as necessary. The upper end portion 5a of the bottle mouth 5 is fitted into the straight tube fitting portion 28, and deformation is restricted.
[0025]
A third embodiment of the present invention will be described with reference to FIG.
The difference between this embodiment and the first embodiment (FIGS. 1 to 3) is that a stepped portion 29 is provided on the upper portion 2a of the outer cylinder 2, and an upper lid (not shown) and the inner plug 1 are screwed together by a screw portion 30. It is.
The stepped portion 29 of the outer cylinder 2 is formed by a small diameter cylinder 29a and a large diameter cylinder 29b, and a circumferential score 11 is provided below the chamfered meat portion 10 on the inner surface on the small diameter cylinder 29a side.
[0026]
A fourth embodiment of the present invention will be described with reference to FIG.
The difference between this embodiment and the first embodiment (FIGS. 1 to 3) is that the outer peripheral surface 5c of the upper end portion of the bottle mouth 5 is formed in a truncated cone shape, and not only the outer peripheral edge 5b of the bottle mouth 5 but also the outer peripheral surface. Reference numeral 5 c also denotes a point in contact with the inner surface 10 f of the chamfered meat portion 10. In this embodiment, since the deformation of the bottle mouth 5 can be further suppressed than in the first to third embodiments, the sealing effect is further improved.
[0027]
A fifth embodiment of the present invention will be described with reference to FIG.
The difference between this embodiment and the third embodiment (FIG. 5) is that the outer peripheral surface 5c of the upper end portion of the bottle mouth 5 is formed in a truncated cone shape, and not only the outer peripheral edge 5b of the bottle mouth 5 but also the outer peripheral surface 5c are chamfered. This is a point in contact with the inner surface 10 f of the meat portion 10. In this embodiment, since the deformation of the bottle mouth 5 can be further suppressed than in the first to third embodiments, the sealing effect is further improved.
[0028]
A sixth embodiment of the present invention will be described with reference to FIGS.
The synthetic resin inner plug 101 includes an outer cylinder 102, an inner cylinder 103 provided inside the outer cylinder 102, and an upper wall 104 that connects the cylinders 102 and 103.
[0029]
A chamfered portion 110 is formed at the intersection 106 between the inner surface 102 f of the outer cylinder 102 and the inner surface 104 f of the upper wall 104. An inner surface 110f of the chamfered meat portion 110 is parallel to the center line 101c of the inner plug 101 and is inclined at an angle θ with respect to a line 110c (hereinafter referred to as a perpendicular) 110c passing through the upper end 110a of the chamfered meat portion 110. The angle θ is appropriately selected within the range of 15 degrees to 30 degrees, and in particular, the angle θ is preferably 18 degrees to 24 degrees.
[0030]
The upper end 110a of the chamfered meat portion 110 coincides with or substantially coincides with the outer diameter d3 of the straight cylindrical upper end portion 105a of the bottle mouth 105, and the outer peripheral edge 105b of the upper end portion 105a abuts on the upper end 110a. Yes.
[0031]
A circumferential score 111 is provided below the chamfered meat portion 110, and an overlap margin 114 that contacts the annular protrusion 108 is provided between the score 11 and the engaging portion 112. This overlap margin 114 improves the sealing effect.
[0032]
A stepped portion 129 is provided on the outer surface of the upper portion 102 a of the outer cylinder 102.
The stepped portion 129 is formed by a small diameter cylinder 129a and a large diameter cylinder 129b, and the small diameter cylinder 129a is provided with a recess 120.
The recess 120 is formed corresponding to the back surface of the tab 121, but the shape, depth, formation range, and the like are appropriately selected as necessary.
[0033]
The tab 121 is provided on the outer peripheral extension surface of the large-diameter cylinder 129b of the stepped portion 129 and protrudes upward from the upper wall 104. However, the tab 121 is tapered and becomes smaller toward the distal end portion 121a. The interval between and has increased. In addition, since this tab 121 does not protrude to the outer side of the outer cylinder, there is no trouble that the inner plugs are entangled with each other or caught by the shooter in the plugging process. An anti-slip 122 is provided on the outer surface of the tab 121, and one side thereof is continuous with a vertical slit (longitudinal weakening portion) 123. The vertical slit 123 extends to the vicinity of the lower end of the large-diameter cylinder 129b.
[0034]
The outer diameter of the inner cylinder 103 is slightly larger than the inner diameter of the bottle mouth 105, and an overlap margin is provided on the outer surface of the inner cylinder 103 so as to contact the inner face of the bottle mouth 105.
This overlap margin improves the sealing effect.
[0035]
8 to 11, reference numeral 130 denotes a screw portion of the upper lid 125 and the inner plug 101, 131 denotes a spout, 132 denotes a pull ring, and 133 denotes a blocking wall.
[0036]
Next, the operation of this embodiment will be described.
Illustrated inner plug 101 in which a bottle container, for example, a polyethylene terephthalate (PET) bottle (PET BOTLE) is filled with liquid contents such as soy sauce heated to a high temperature for sterilization, and then top cover 125 is screwed in advance. A stopper is attached to the bottle mouth 105 by a stopper device that does not.
[0037]
The upper end portion 105a of the bottle mouth 105 approaches the upper wall inner surface 104f while being guided by the inner surface 110f of the chamfered meat portion 110, the top surface of the bottle mouth 105 abuts against the upper wall inner surface 104f, and its outer peripheral edge 105b is It contacts the upper end 110a of the chamfered meat portion 110.
[0038]
At this time, since the outer diameter of the inner cylinder 103 is formed larger than the inner diameter of the bottle mouth 105, the upper end portion 105a of the bottle mouth 105 is pressed toward the outer cylinder 2 by the reaction force of the inner cylinder 103. Since the outer peripheral edge 105b of the mouth 105 is in contact with the upper end 110a of the chamfered meat portion 110, deformation thereof is suppressed. Therefore, the inner peripheral surface of the bottle mouth 105 and the outer peripheral surface of the inner cylinder 103 are always in close contact with each other, so that no seal leakage occurs.
[0039]
At the time of separation and collection, the upper lid 125 is rotated in a predetermined direction to be removed from the inner plug 101, and the tab 121 is picked with a finger. At this time, there is sufficient space on the back side of the tab 121, and since the anti-slip 122 is provided on the outer surface of the tab 121, the tab 121 can be firmly held.
[0040]
When the tab 121 is pulled in a predetermined direction, the longitudinal slit 123 (longitudinal weakening line) is torn and the circumferential score 111 is also torn, and the engagement between the annular protrusion 118 and the engaging portion 112 is loosened. Therefore, the inner stopper 1 can be easily removed from the bottle mouth 5.
[0041]
【Effect of the invention】
In the present invention, since the deformation restricting means for the upper end of the bottle opening is provided at the intersection between the inner surface of the outer cylinder and the inner surface of the upper wall, it is possible to prevent the bottle opening from expanding even during high temperature filling. Therefore, since the inner cylinder and the bottle mouth are always in close contact with each other, there is no leakage of the seal.
[0042]
When a chamfered meat portion is used as the deformation regulating means, the bottle mouth is guided to the inner surface of the chamfered meat portion at the time of capping, so that the capping work can be performed smoothly.
[0043]
In the present invention, a stepped portion is formed at the upper portion of the outer cylinder, a circumferential score is provided on the small diameter tube side of the stepped portion, and a tab is provided on the extended outer peripheral surface of the large diameter tube of the stepped portion. The plugs do not get entangled with each other or get caught in the shooter. Further, since the concave portion is formed in the portion of the small diameter cylinder corresponding to the back surface of the tab, the space on the back surface of the tab can be increased as compared with the conventional example. Therefore, since the tab can be securely grasped with a finger, the longitudinal weakening line and the circumferential score can be easily torn. Therefore, it is possible to efficiently perform the separation and collection work.
[Brief description of the drawings]
FIG. 1 is a plan view showing a first embodiment of the present invention in an open state.
FIG. 2 is a view showing a part of a cross section taken along line AA of FIG.
FIG. 3 is an enlarged view of a main part of FIG. 2;
FIG. 4 is a longitudinal sectional view showing a second embodiment of the present invention and corresponding to FIG.
FIG. 5 is a longitudinal sectional view showing a third embodiment of the present invention and corresponding to FIG. 3;
6 is a longitudinal sectional view showing a fourth embodiment of the present invention and corresponding to FIG.
FIG. 7 is a longitudinal sectional view showing a fifth embodiment of the present invention and corresponding to FIG.
FIG. 8 is a front view showing a sixth embodiment of the present invention.
FIG. 9 is a plan view showing a sixth embodiment of the present invention.
FIG. 10 is a longitudinal sectional view showing a sixth embodiment of the present invention.
11 is an enlarged view of a main part of FIG.
[Explanation of symbols]
1 Inner plug 2 Outer cylinder 2a Outer cylinder upper part 3 Inner cylinder 4 Upper wall 5 Bottle mouth 6
10 Chamfered meat part 11 Circumferential score 121 Tab

Claims

外筒と、該外筒の内側に設けられた内筒と、前記両筒を連結する上壁と、を備え、該外筒上部の内径は瓶口の外径よりも大きく形成され、該内筒の外径は該瓶口の内径よりも大きく形成された中栓であって：
前記外筒内面と上壁内面との交差部に、高温充填時に、該瓶口が拡がるのを防止する面取り肉部を設けたことを特徴とする分別回収中栓。An outer cylinder, an inner cylinder provided on the inner side of the outer cylinder, and an upper wall that connects the two cylinders, and the inner diameter of the upper part of the outer cylinder is formed larger than the outer diameter of the bottle mouth. The inner diameter of the tube is an inner stopper formed larger than the inner diameter of the bottle mouth :
A plug for separating and collecting according to claim 1, wherein a chamfered meat portion is provided at an intersection between the inner surface of the outer cylinder and the inner surface of the upper wall to prevent the bottle mouth from expanding during high temperature filling .

面取り肉部の内面が、垂線に対して１５度〜３０度傾斜していることを特徴とする請求項１記載の分別回収中栓。The inner surface of the chamfered wall section, separate collection in plug according to claim 1, wherein the inclined 15 degrees to 30 degrees with respect to the normal.

面取り肉部の上端に、直筒嵌合部を設けたことを特徴とする請求項１記載の分別回収中栓。The upper end of the chamfered wall section, separate collection in plug according to claim 1, characterized in that a straight tubular fitting portion.

面取り肉部の内面が、瓶口上端部の円錐台状外周面に当接することを特徴とする請求項１記載の分別回収中栓。The inner surface of the chamfered wall section according to claim 1, separate collection of plug wherein the abutting the frusto-conical outer peripheral surface of the bottle mouth top end.

外筒と、該外筒の内側に設けられた内筒と、前記両筒を連結する上壁と、を備え、該外筒上部の内径は瓶口の外径よりも大きく形成され、該内筒の外径は該瓶口の内径よりも大きく形成された中栓であって：
前記外筒内面と上壁内面との交差部に、高温充填時に、該瓶口が拡がるのを防止する面取り肉部を設け、該面取り肉部の下方に、円周方向スコアを設けたことを特徴とする分別回収中栓。An outer cylinder, an inner cylinder provided on the inner side of the outer cylinder, and an upper wall that connects the two cylinders, and the inner diameter of the upper part of the outer cylinder is formed larger than the outer diameter of the bottle mouth. The inner diameter of the tube is an inner stopper formed larger than the inner diameter of the bottle mouth :
A chamfered meat portion is provided at the intersection between the inner surface of the outer cylinder and the inner surface of the upper wall to prevent the bottle mouth from spreading during high temperature filling , and a circumferential score is provided below the chamfered meat portion. Features a separate collection stopper.

円周方向スコアが、外筒上部の肉厚部に形成された縦溝と対向していることを特徴とする請求項５記載の分別回収中栓。6. The intermediate collection stopper according to claim 5 , wherein the circumferential score is opposed to a longitudinal groove formed in a thick part at an upper part of the outer cylinder.

円周方向スコアが、外筒上部の段状部の小径筒側に設けられていることを特徴とする請求項５記載の分別回収中栓。6. The intermediate collection stopper according to claim 5 , wherein the circumferential score is provided on the small-diameter cylinder side of the stepped portion at the upper part of the outer cylinder.

外筒と、該外筒の内側に設けられた内筒と、前記両筒を連結する上壁と、を備え、該外筒上部の内径は瓶口の外径よりも大きく形成され、該内筒の外径は該瓶口の内径よりも大きく形成された中栓であって：
前記外筒内面と上壁内面との交差部に、高温充填時に、該瓶口が拡がるのを防止する面取り肉部を設け、
前記外筒上部に段状部を形成し、
該段状部の小径筒側に円周方向スコアを設け、
該段状部の大径筒の延長外周面上にタブを設け、
前記小径筒の、該タブの背面に対応する部分に凹部を形成したことを特徴とする分別回収キャップ。An outer cylinder, an inner cylinder provided on the inner side of the outer cylinder, and an upper wall that connects the two cylinders, and the inner diameter of the upper part of the outer cylinder is formed larger than the outer diameter of the bottle mouth. The inner diameter of the tube is an inner stopper formed larger than the inner diameter of the bottle mouth :
At the intersection of the inner surface of the outer cylinder and the inner surface of the upper wall, a chamfered meat portion is provided to prevent the bottle mouth from expanding during high temperature filling.
Forming a stepped portion on the outer cylinder ,
A circumferential score is provided on the small diameter side of the stepped portion,
A tab is provided on the extended outer peripheral surface of the large-diameter cylinder of the stepped portion,
A separation recovery cap, wherein a concave portion is formed in a portion of the small-diameter cylinder corresponding to the back surface of the tab.

円周方向スコアが、縦スリットに連続していることを特徴とする請求項８記載の分別回収中栓。The circumferential collection score according to claim 8 , wherein the circumferential score is continuous with the longitudinal slit.