JP4017838B2 - Container mouth - Google Patents

Container mouth Download PDF

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Publication number
JP4017838B2
JP4017838B2 JP2001156102A JP2001156102A JP4017838B2 JP 4017838 B2 JP4017838 B2 JP 4017838B2 JP 2001156102 A JP2001156102 A JP 2001156102A JP 2001156102 A JP2001156102 A JP 2001156102A JP 4017838 B2 JP4017838 B2 JP 4017838B2
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JP
Japan
Prior art keywords
bottle
mouth
top surface
expanded
inner peripheral
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
Application number
JP2001156102A
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Japanese (ja)
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JP2002347731A (en
Inventor
夏夫 篠崎
正 栗山
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.)
Yoshino Kogyosho Co Ltd
Original Assignee
Yoshino Kogyosho 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 Yoshino Kogyosho Co Ltd filed Critical Yoshino Kogyosho Co Ltd
Priority to JP2001156102A priority Critical patent/JP4017838B2/en
Publication of JP2002347731A publication Critical patent/JP2002347731A/en
Application granted granted Critical
Publication of JP4017838B2 publication Critical patent/JP4017838B2/en
Anticipated expiration legal-status Critical
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Description

【0001】
【発明の属する技術分野】
本発明は、容器、プリフォームの口部に関する。
【0002】
【発明が解決しようとする課題】
従来のボトル口部の天面外周縁にはエッジが形成され、丸みが付けられたとしても大きい円弧ではなかった。
そのため、成形したボトルを運搬するときや、函詰めして輸送するときにボトル同士がぶつかり、ボトル口部天面の外周縁が、他のボトル口部天面の内周縁に衝突して凹部を作り、その周縁に突出部を形成するなど傷を付けることがあった。
【0003】
また、延伸ブロー成形用のプリフォームも、搬送時にプリフォームが相互にぶつかり、その開放端部の内周に傷がつくことがあり、その傷がそのまま延伸ブロー成形されたボトルのボトル口部内周の傷になるという問題があった。
【0004】
中栓が打栓によりボトル口部に嵌着される場合、口部天面内周縁の傷が大きいときには、打栓時に、傷の突出部が中栓の嵌合筒の内筒の締め代を形成する外周面に縦方向にすじ目をつけ、内筒と口部内周との間に細条、すなわち微細な連続孔ができ、それを通じて内容液が洩れ出したり、外気がボトル口部と中栓の間からボトル内に導入されるおそれがあるという問題があった。
【0005】
これを防ぐため、容器口部の天面内周縁に湾曲面を形成したり、天面との間にわずかな段差部を設けて湾曲面を形成したりすることが従来より提案されている(例えば特開平7−257612号公報参照)。
【0006】
しかしながら、図5に示すように、ボトル同士が、それぞれの口部直径上で衝突した場合、ボトル口径が小さい場合(D1)と大きい場合(D2)とを比較すると、口径が大きい場合は、交差角がαからβに大きくなり、また、ボトル重量も増えるので、一方のボトル口部の外周面が他方のボトル口部の内周面の下方深くまで凹ませることになる。
そのため、従来のように、天面内周縁にわずかな湾曲面や、わずかな段差と湾曲面とを設けても湾曲面の下方に傷が付き、傷による突出部がボトル口部の内周面まで達するおそれがある。
【0007】
本発明は、上記の問題を考慮し、ボトル口部がぶつかっても、相手のボトル口部に傷がつかないようにすること、また口部天面内周に傷が付けられるようなことがあっても、その傷によって打栓時に中栓嵌合筒の内筒に傷が付かないようにすることを課題として、口部の形状を改善したボトルを提供することを目的とする。
【0008】
【課題を解決するための手段】
本発明は、上記の課題を解決するため、容器の口部として、天面と内周面、外周面とから形成され、中栓が被着される合成樹脂製容器の口部において、口部の内周面上端部を拡径して、天面と交差する一定高さを有する拡径面を形成し、拡径面下端の段部の内周縁を他のボトルの天面周縁と接触しないように位置させ、口部外周面と天面との角部を丸め付けし、平滑な湾曲面としたことを特徴とする構成を採用する。
【0009】
容器を成形するプリフォームとして、開放端部の内周面上端部を拡径して天面と交差する一定高さを有する拡径面を形成し、開放端部外周面と天面との角部を丸め付けし、平滑な湾曲面としたことを特徴とする構成を採用する。
また、容器またはプリフォームの素材樹脂として、とくに、ポリエチレンテレフタレートを採用する。
【0010】
【発明の実施の形態】
次に、本発明の第1実施形態について、図面を参照して説明する。
図1において、Aは、ポリエチレンテレフタレート(PET)、その他硬質の合成樹脂をもって成形されたボトルで、ボトルAは、口部1と胴部2、底部3とからなっている。
【0011】
口部1の外周には、天面4の周縁に接続する円錐面5aと円筒面5bとを具えた係合突条6が突設されており、その下方には、ネックリング7が突設されている。
天面4と円錐面5aとの角部aは、図2に示すように、比較的大きな円弧によって丸め付けされ、平滑な湾曲面8となっている。
【0012】
口部内周1a上部は、上端から一定長が拡径されて拡径面9が形成され、その下端は段部10となっている。
段部10の傾斜角は任意に採用することができ、段部10の内外周縁には丸み付けしてもよい。
拡径面9の径は、後述する中栓嵌合筒の内筒の外周面よりもやや大きくしている。
【0013】
上記ボトルAの形成後に函詰めして運搬、輸送される場合、函詰めの際、または函から取り出したときに、口部1の天面4外周縁は平滑な湾曲面8となっているため、ボトルの口部1が相互に衝突しても面接触となるので、相手のボトルの口部1の天面4の内外周縁を傷つけることはほとんどない。
また、仮に天面4の内周縁、すなわち拡径面9との交差縁に傷が付いても、段部10の内周縁10aには傷が付かない。
【0014】
次に、上記ボトルAに、中栓を打栓により容器口部に嵌着した注出容器について説明する。
図3において、Bは中栓、Cはキャップで、それぞれ軟質の合成樹脂で成形されている。
中栓Bは、注出筒11と嵌合筒12とを具え、嵌合筒12は、外筒13と内筒14、肩壁15とからなっている。
外筒13の内周下部には、膨出突条16が設けられ、内筒14には、ボトル口部内周1aとの間に締め代を形成する膨出部17が形成されている。
【0015】
ボトル口部1に中栓Bを打栓する時には、天面4の内周面に傷が付けられてもボトル口部内周1aの段部内周縁10aに傷がないことにより、中栓Bの内筒14の膨出部17に縦方向のすじ目がつけられないので、ボトル使用中に液洩れ、外気の導入などをなくすことができる。
【0016】
次に、第2実施形態について説明する。
本実施形態は、プリフォームに係るものである。
前記各実施形態のボトルは、プリフォームを用いて延伸ブロー成形される場合がある。
その際、プリフォームの開放端の形状を前記ボトルと同様な改良を施すことによって、前記実施形態と同等の効果を得ることができる。
【0017】
図4において、Pはプリフォームで、有底の円筒として成形されており、ボトル口部を形成する開放端部には、天面20に続く円錐面21aと円筒面21bとからなる膨出環22と、ネックリング23が突設されている。
天面20と円錐面21aとの角部は、丸み付けされ平滑な湾曲面24となっており、開放端部内周の上端部は拡径され、拡径面25と段部26が形成されている。
【0018】
上記プリフォームは、運搬中に相互の開放端部がぶつかりあっても、段部26の内周縁は傷つけられない。
また、このプリフォームPによってボトルを延伸ブロー成形したときには、ボトル口部の天面の外周縁は、円弧で丸め付けされた平滑な湾曲面が形成され、口部内周に拡径面と段部が形成されるので、第1実施形態と同様の作用効果がもたらせられる。
【0019】
前記各実施形態では、円形ボトルを図示して説明したが、円形ボトルに限らず角形ボトルであってもよく、また、中栓の材質より硬質であれば、高密度ポリエチレン、ポリプロピレン、その他比較的軟質の合成樹脂を用いたボトルにも適用することができ、樹脂材料については硬質の合成樹脂に限定されない。
【0020】
【発明の効果】
本発明は、上記のように構成されているから、次の効果を奏する。
ボトルの天面と、天面に続く外周面との角部を丸め付けした平滑な湾曲面としたから、ボトルがぶつかり、相互の口部天面が衝突しても、天面、天面内周縁に傷がつかないようになった。
また、仮に天面内周と拡径面との交差縁に傷が付いても、段部の内周縁には傷が付かないので、打栓時に中栓内筒の締め代を形成する外周面に傷をつけることがなく、シール性が確保され、内容液が洩れたり外気がボトル内に入ることはない。
【図面の簡単な説明】
【図1】本発明第1実施形態ボトルの一部断面正面図である。
【図2】要部を説明するための口部の断面図である。
【図3】中栓を打栓したボトル口部の説明図である。
【図4】プリフォームの一部断面正面図である。
【図5】ボトル口部の口径の変化に伴う交差角の説明図である。
【符号の説明】
A、 ボトル
B 中栓
C キャップ
P プリフォーム
a 角部
1 口部
1a 口部内周
2 胴部
3 底部
4、20 天面
5a、21a 円錐面
5b、21b 円筒面
6 係合突条
7、23 ネックリング
8、24 湾曲面
9、25 拡径面
10、26 段部
10a 段部内周縁
13 外筒
14 内筒
15 肩壁
17 膨出部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a container and a mouth of a preform.
[0002]
[Problems to be solved by the invention]
Even if the edge is formed in the outer periphery of the top surface of the conventional bottle mouth part and rounded, it was not a large arc.
Therefore, when transporting molded bottles or packing and transporting the bottles, the bottles collide with each other, the outer peripheral edge of the bottle mouth part top surface collides with the inner peripheral edge of the other bottle mouth part top surface and the recess In some cases, scratches were made, such as forming protrusions around the edges.
[0003]
Also, the preforms for stretch blow molding may collide with each other during transportation, and the inner periphery of the open end may be scratched. There was a problem of becoming a wound.
[0004]
When the inner stopper is fitted to the bottle mouth by stoppering, when the wound on the inner periphery of the top of the mouth is large, the protruding portion of the wound reduces the allowance of the inner cylinder of the inner stopper fitting cylinder at the time of stoppering. The outer peripheral surface to be formed has vertical lines, and a strip, that is, a fine continuous hole, is formed between the inner cylinder and the inner periphery of the mouth, through which the content liquid leaks and outside air enters the bottle mouth and the inside. There was a problem that it might be introduced into the bottle from between the stoppers.
[0005]
In order to prevent this, it has been conventionally proposed to form a curved surface on the inner peripheral edge of the top of the container mouth, or to form a curved surface by providing a slight step between the top surface ( For example, refer to JP-A-7-257612.
[0006]
However, as shown in FIG. 5, when the bottles collide with each other at the mouth diameter, when the bottle diameter is small (D1) and when the bottle diameter is large (D2), when the bottle diameter is large, Since the angle increases from α to β and the weight of the bottle increases, the outer peripheral surface of one bottle mouth portion is recessed deeply below the inner peripheral surface of the other bottle mouth portion.
Therefore, as in the past, even if a slight curved surface or a slight step and curved surface are provided on the inner peripheral edge of the top surface, the curved surface is scratched below, and the protruding portion due to the scratch is the inner peripheral surface of the bottle mouth portion. May reach up to.
[0007]
In consideration of the above problems, the present invention makes it possible to prevent the partner's bottle mouth from being scratched even if the bottle mouth hits, and to damage the inner periphery of the top of the mouth. Even if it exists, it aims at providing the bottle which improved the shape of the opening | mouth part by making it a subject to prevent a damage | wound to the inner cylinder of an inside plug fitting cylinder at the time of stoppering.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a mouth portion of a synthetic resin container formed from a top surface, an inner peripheral surface, and an outer peripheral surface as a mouth portion of a container, to which an inner stopper is attached. The upper end of the inner peripheral surface of the bottle is enlarged to form a diameter-increased surface having a constant height that intersects the top surface, and the inner peripheral edge of the step at the lower end of the expanded-diameter surface is not in contact with the peripheral edge of the top surface of another bottle. The structure characterized by rounding the corner | angular part of a mouth part outer peripheral surface and a top | upper surface, and making it the smooth curved surface is employ | adopted.
[0009]
As a preform for molding a container, the upper end of the inner peripheral surface of the open end is enlarged to form a diameter-enlarged surface having a certain height intersecting the top surface, and the angle between the open end outer peripheral surface and the top surface The configuration is characterized in that the portion is rounded to obtain a smooth curved surface.
In addition, polyethylene terephthalate is particularly employed as the material resin for the container or preform.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, a first embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, A is a bottle formed of polyethylene terephthalate (PET) or other hard synthetic resin, and the bottle A includes a mouth portion 1, a body portion 2, and a bottom portion 3.
[0011]
An engaging protrusion 6 having a conical surface 5a and a cylindrical surface 5b connected to the periphery of the top surface 4 protrudes from the outer periphery of the mouth portion 1, and a neck ring 7 protrudes below the protruding protrusion 6. Has been.
As shown in FIG. 2, the corner portion a between the top surface 4 and the conical surface 5 a is rounded by a relatively large arc to form a smooth curved surface 8.
[0012]
The upper part of the inner periphery 1a of the mouth portion has a constant length enlarged from the upper end to form an enlarged diameter surface 9, and the lower end thereof is a stepped portion 10.
The inclination angle of the step portion 10 can be arbitrarily adopted, and the inner and outer peripheral edges of the step portion 10 may be rounded.
The diameter of the enlarged diameter surface 9 is slightly larger than the outer peripheral surface of the inner cylinder of the inner plug fitting cylinder described later.
[0013]
When the bottle A is packed and transported and transported after the bottle A is formed, the outer peripheral edge of the top surface 4 of the mouth portion 1 is a smooth curved surface 8 when packed or taken out from the box. Even if the mouth portions 1 of the bottle collide with each other, they are in surface contact, and therefore the inner and outer peripheral edges of the top surface 4 of the mouth portion 1 of the partner bottle are hardly damaged.
Even if the inner peripheral edge of the top surface 4, that is, the crossing edge with the enlarged diameter surface 9 is damaged, the inner peripheral edge 10 a of the step portion 10 is not damaged.
[0014]
Next, a dispensing container in which an inner stopper is fitted to the container mouth by a stopper will be described.
In FIG. 3, B is an inner plug, and C is a cap, each of which is formed of a soft synthetic resin.
The inner plug B includes a dispensing cylinder 11 and a fitting cylinder 12, and the fitting cylinder 12 includes an outer cylinder 13, an inner cylinder 14, and a shoulder wall 15.
A bulging ridge 16 is provided on the inner peripheral lower portion of the outer cylinder 13, and an bulging portion 17 is formed on the inner cylinder 14 so as to form a tightening margin with the bottle mouth inner periphery 1 a.
[0015]
When the inner stopper B is plugged into the bottle mouth portion 1, even if the inner peripheral surface of the top surface 4 is scratched, the inner peripheral edge 10a of the bottle mouth inner periphery 1a is not damaged. Since no vertical streaks are formed in the bulging portion 17 of the cylinder 14, it is possible to eliminate liquid leakage and the introduction of outside air during use of the bottle.
[0016]
Next, a second embodiment will be described.
The present embodiment relates to a preform.
The bottles of the above embodiments may be stretch blow molded using a preform.
In that case, the same effect as the said embodiment can be acquired by giving the open end shape of a preform the improvement similar to the said bottle.
[0017]
In FIG. 4, P is a preform, which is formed as a bottomed cylinder, and has a bulge ring formed of a conical surface 21a and a cylindrical surface 21b following the top surface 20 at the open end forming the bottle mouth. 22 and a neck ring 23 project.
The corners of the top surface 20 and the conical surface 21a are rounded and smooth curved surfaces 24. The upper end of the inner periphery of the open end is expanded, and the expanded surface 25 and the stepped portion 26 are formed. Yes.
[0018]
Even if the open ends collide with each other during transportation, the inner periphery of the stepped portion 26 is not damaged.
Further, when the bottle is stretch blow molded by the preform P, the outer peripheral edge of the top surface of the bottle mouth portion is formed with a smooth curved surface rounded by an arc, and the enlarged surface and stepped portion are formed on the inner periphery of the mouth portion. Thus, the same effect as the first embodiment can be obtained.
[0019]
In each of the above embodiments, the circular bottle is illustrated and described. However, the bottle is not limited to the circular bottle, and may be a square bottle. The present invention can be applied to a bottle using a soft synthetic resin, and the resin material is not limited to a hard synthetic resin.
[0020]
【The invention's effect】
Since this invention is comprised as mentioned above, there exists the following effect.
A smooth curved surface with rounded corners between the top surface of the bottle and the outer peripheral surface that follows the top surface, so even if the bottle collides and the top surfaces of the mouth collide, The edges are not scratched.
In addition, even if the crossing edge between the inner periphery of the top surface and the expanded surface is scratched, the inner periphery of the stepped portion will not be damaged. The seals are secured, and the liquid contents do not leak or the outside air does not enter the bottle.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional front view of a bottle according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view of a mouth for explaining a main part.
FIG. 3 is an explanatory diagram of a bottle mouth portion in which an inner stopper is plugged.
FIG. 4 is a partially sectional front view of a preform.
FIG. 5 is an explanatory diagram of an intersection angle associated with a change in the diameter of the bottle mouth portion.
[Explanation of symbols]
A, Bottle B Inner plug C Cap P Preform a Corner 1 Mouth 1a Mouth inner circumference 2 Body 3 Bottom 4, 20 Top surface 5a, 21a Conical surface 5b, 21b Cylindrical surface 6 Engaging ridge 7, 23 Neck Rings 8 and 24 Curved surfaces 9 and 25 Expanded surface 10 and 26 Stepped portion 10a Stepped portion inner peripheral edge 13 Outer tube 14 Inner tube 15 Shoulder wall 17 Swelled portion

Claims (3)

天面と内周面、外周面とから形成され、中栓が被着される合成樹脂製容器の口部において、
口部の内周面上端部を拡径して、天面と交差する一定高さを有する拡径面を形成し、
拡径面下端の段部の内周縁を他のボトルの天面周縁と接触しないように位置させ、
口部外周面と天面との角部を丸め付けし、平滑な湾曲面としたことを特徴とする容器。
In the mouth of the synthetic resin container formed from the top surface and the inner peripheral surface, the outer peripheral surface, to which the inner plug is attached,
The upper end of the inner peripheral surface of the mouth is expanded to form an expanded surface having a certain height that intersects the top surface,
Position the inner peripheral edge of the step at the lower end of the expanded diameter surface so as not to contact the peripheral edge of the top surface of the other bottle,
A container characterized by rounding the corners of the outer peripheral surface of the mouth and the top surface to form a smooth curved surface.
開放端部の内周面上端部を拡径して、天面と交差する一定高さを有する拡径面を形成し、
開放端部外周面と天面との角部を丸め付けし、平滑な湾曲面としたことを特徴とする請求項1記載の容器を成形するためのプリフォーム。
The upper end of the inner peripheral surface of the open end is expanded to form an expanded surface having a certain height that intersects the top surface,
The preform for molding a container according to claim 1 , wherein a corner portion between the outer peripheral surface of the open end and the top surface is rounded to form a smooth curved surface.
素材樹脂が、ポリエチレンテレフタレートであることを特徴とする請求項1または2記載の容器またはプリフォーム。  The container or preform according to claim 1 or 2, wherein the material resin is polyethylene terephthalate.
JP2001156102A 2001-05-24 2001-05-24 Container mouth Expired - Lifetime JP4017838B2 (en)

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JP4017838B2 true JP4017838B2 (en) 2007-12-05

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Publication number Priority date Publication date Assignee Title
JP4492115B2 (en) * 2003-12-09 2010-06-30 凸版印刷株式会社 Packaging container
JP5051427B2 (en) * 2006-10-31 2012-10-17 株式会社吉野工業所 Mouth tube part of plastic container
JP7053144B2 (en) * 2016-12-22 2022-04-12 プレミアムウォーター株式会社 Manufacturing method of capped container and capped container

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