JP2008184220A - Synthetic resin container - Google Patents

Synthetic resin container Download PDF

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Publication number
JP2008184220A
JP2008184220A JP2007021760A JP2007021760A JP2008184220A JP 2008184220 A JP2008184220 A JP 2008184220A JP 2007021760 A JP2007021760 A JP 2007021760A JP 2007021760 A JP2007021760 A JP 2007021760A JP 2008184220 A JP2008184220 A JP 2008184220A
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Japan
Prior art keywords
shoulder
container
synthetic resin
rib
triangular
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JP2007021760A
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JP4978909B2 (en
Inventor
Takayuki Kobayashi
隆之 小林
Shigeru Tomiyama
富山　　茂
Hiroaki Imai
宏明 今井
Takao Iizuka
高雄 飯塚
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Yoshino Kogyosho Co Ltd
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Yoshino Kogyosho Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a synthetic resin container which has radial ribs and recesses formed at a shoulder portion, by preventing a stress due to a depressing load from being concentrated on a connection portion between a shoulder lower edge and each radial rib, to thereby improve the buckling strength of the shoulder portion of the synthetic resin container of this type. <P>SOLUTION: In the shoulder portion 4 at which the triangular projective radial ribs 5 are formed in a manner radially inclining downward at equal central angles, a projective edge of a lower end of each radial rib 5 is formed into a triangular chamfered edge 6 widened downward, and the lower edge of the radial rib 5 is connected to the shoulder lower edge while securing a predetermined width. Thus, when depressing load is applied to the container, concentration and operation of stress at the lower edge of the radial rib 5 in a spot-like state, can be prevented. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、肩部の外観を好ましいものとするデザインとして、比較的深い、放射状の凹凸を肩部に刻設状に設けた、ボトル状の合成樹脂製容器に関するものである。   The present invention relates to a bottle-shaped synthetic resin container provided with a relatively deep, radial unevenness in an engraved shape on the shoulder as a design that makes the appearance of the shoulder preferable.

ポリエチレンテレフタレート樹脂製２軸延伸ブロー成形ボトル等の、合成樹脂製容器にあっては、主としてその優れた透明性による光学効果を利用して、好ましい外観を得る目的で、肩部に比較的深い放射状の凹凸を刻設状に設けて、デザインしたものが知られている。   For synthetic resin containers such as biaxially stretched blow molded bottles made of polyethylene terephthalate resin, a relatively deep radial shape on the shoulder, mainly for the purpose of obtaining a favorable appearance, utilizing the optical effect of its excellent transparency It is well known that it has been designed with the concaves and convexes in a carved shape.

その代表的なものは、図５に示すように、２軸延伸ブロー成形された、ボトル状の合成樹脂製容器の肩部ａに、複数の陥没部ｃを設けることにより、この陥没部ｃの間に、等中心角毎に三角突条状の放射リブｂを残存形成した構成となっている。   As shown in FIG. 5, a typical example is that a plurality of depressed portions c are provided on the shoulder portion a of a bottle-shaped synthetic resin container that is biaxially stretched and blow-molded. In the meantime, the triangular rib-like radiation ribs b are left and formed at every equicentral angle.

この上記した従来技術にあっては、放射リブｂと陥没部ｃとにより、比較的深い凹凸を形成し、これにより面白味のある外観体裁と、変化のある光学的な装飾効果を得ることができるものとなっている。   In the above-described prior art, relatively deep irregularities are formed by the radiating rib b and the depressed portion c, thereby making it possible to obtain an interesting appearance and a varied optical decoration effect. It has become a thing.

しかしながら、上記した従来技術にあっては、容器に押し下げ荷重が作用すると、肩部ａの下端部と、放射リブｂの稜線部分の下端部の連設部分Ａが折れて、座屈してしまう、と云う問題があった。   However, in the above-described prior art, when a pressing load acts on the container, the lower end portion of the shoulder portion a and the continuous portion A at the lower end portion of the ridge line portion of the radiation rib b break and buckle. There was a problem.

これは、容器に作用した押し下げ荷重を支える放射リブｂに作用する応力が、点状となっている連設部分Ａに局部的に集中するからである。   This is because the stress acting on the radiation rib b that supports the pressing load acting on the container is concentrated locally on the continuous portion A that is dotted.

そこで、本発明は、上記した従来技術における問題点を解消すべく創案されたもので、肩部に放射リブを設けた合成樹脂製容器において、肩部下端部と放射リブとの連設部分に、押し下げ荷重に伴う応力が集中作用しないようにすることを技術的課題とし、もってこの種の合成樹脂製容器の肩部の座屈強度を向上させることを目的とする。   Therefore, the present invention was devised to solve the above-described problems in the prior art, and in a synthetic resin container provided with a radiating rib on the shoulder, it is provided at a continuous portion between the lower end of the shoulder and the radiating rib. The purpose of the present invention is to prevent the stress associated with the pressing load from being concentrated and to improve the buckling strength of the shoulder portion of this type of synthetic resin container.

本発明による合成樹脂製容器は、テーパー筒状をした肩部に、下降傾斜した三角突条状の放射リブを複数設け、この放射リブを等中心角毎に配置したものである。   The synthetic resin container according to the present invention is provided with a plurality of downwardly inclined triangular protrusion-shaped radiation ribs on a shoulder portion having a tapered tube shape, and the radiation ribs are arranged at equal central angles.

肩部の各放射リブは、その下端部の突出端部を、角取りして、下方に拡幅する三角形状の角取り端部に成形している。   Each radiation rib of the shoulder portion is formed into a triangular chamfered end portion that has a protruding end portion at its lower end portion that is rounded and widened downward.

この角取り端部の下端縁は、肩部下端部と放射リブの下端部との連設部分を形成することになるが、角取り端部が下方に拡幅する三角形状となっているので、放射リブの下端は、角取り端部の三角形状の下端の「辺」の幅で、肩部下端部に連設することになる。   The lower end edge of this chamfered end portion forms a continuous portion between the lower end portion of the shoulder portion and the lower end portion of the radiation rib, but the chamfered end portion has a triangular shape that widens downward, The lower end of the radiating rib is connected to the lower end of the shoulder with the width of the “side” of the triangular lower end of the chamfered end.

それゆえ、容器の押し下げ荷重が作用した際に、肩部下端部は、各放射リブに発生した応力を、角取り端部の三角形状の「辺」で支えることになり、これにより放射リブに発生した応力が点状の局部に集中して作用することが防止される。   Therefore, when the load of pushing down the container is applied, the lower end of the shoulder supports the stress generated in each radiating rib by the triangular “side” of the chamfered end. The generated stress is prevented from concentrating and acting on the point-like local portions.

本発明は、上記した構成となっているので、以下に示す効果を奏する。
本発明にあっては、押し下げ荷重により各放射リブに発生した応力は、肩部下端部が、放射リブの下端縁となる角取り端部の三角形状の下端の「辺」で支えるので、放射リブに発生した応力が点状の局部に集中して作用することが防止され、幅を持って支えられることになり、これにより座屈変形の発生が防止されて、肩部の座屈強度の向上が達成される。 Since the present invention has the above-described configuration, the following effects can be obtained.
In the present invention, the stress generated in each radiating rib due to the pressing load is radiated because the lower end of the shoulder is supported by the “side” of the triangular lower end of the chamfered end that becomes the lower end edge of the radiating rib. The stress generated in the rib is prevented from concentrating and acting on the spot-like local area, and it is supported with a width, which prevents the occurrence of buckling deformation and the buckling strength of the shoulder. Improvement is achieved.

以下、本発明の一実施形態を、図面を参照しながら説明する。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

図１は容器の全体正面図、図２はその要部拡大正面図、図３はその要部拡大平面図で、この容器は、ポリエチレンテレフタレート樹脂により、ボトル状に２軸延伸ブロー成形されている。   1 is an overall front view of the container, FIG. 2 is an enlarged front view of the main part thereof, and FIG. 3 is an enlarged plan view of the main part thereof. The container is biaxially stretched and blow-molded into a bottle shape with polyethylene terephthalate resin. .

容器の胴部９は、下端を底部で塞いだ有底円筒形状をしており、その上端部と下端部に設けた補強周溝１１の間の中央部分に、減圧吸収のための縦長なパネル壁１０が、周方向に沿って等間隔に六つ平行に設けられている。   The body portion 9 of the container has a bottomed cylindrical shape with its lower end closed at the bottom, and a vertically long panel for absorbing vacuum at the central portion between the upper and lower reinforcing circumferential grooves 11 provided at the lower end. Six walls 10 are provided in parallel at equal intervals along the circumferential direction.

この胴部９の上端に、上方に縮径したテーパー筒状の肩部４を介して起立連設された口筒部１は、短円筒体の外周面に、上から順に、螺条２、ストップリングそしてネックリング３を設けて構成されている。   A mouth tube portion 1 erected and connected to the upper end of the body portion 9 via a tapered tubular shoulder portion 4 whose diameter is reduced upward is formed on the outer peripheral surface of the short cylindrical body in order from the top, A stop ring and a neck ring 3 are provided.

口筒部１と胴部９との間に位置した、上方に縮径したテーパー筒形状の肩部４は、胴部９との連設部分である下端部８を除いた部分に、１０個の陥没部７を刻設状に陥没設することにより、この陥没部７の間に、等中心角毎に放射状に下降傾斜した三角突条状の放射リブ５を、残存形成し、各放射リブ５の下端部の突出端部を、角取りして、下方に拡幅する三角形状の角取り端部６に成形して構成されている。   The tapered cylindrical shoulder portion 4 which is located between the mouth tube portion 1 and the trunk portion 9 and which has a diameter reduced upward is provided in a portion excluding the lower end portion 8 which is a continuous portion with the trunk portion 9. In this way, the triangular rib-like radiating ribs 5 that are radially inclined at every equicentral angle are left between the dents 7. The projecting end of the lower end of 5 is rounded and shaped into a triangular rounded end 6 that widens downward.

放射リブ５の下端部に形成される角取り端部６は、その全体の長さが、放射リブ５の全体の長さの３０％以下に、そしてその三角形の下端の「辺」である下端縁の幅が、放射リブ５の全体の長さの２０％以下に設定されており、これにより角取り端部６が、容器の外観を損ねない。   The chamfered end portion 6 formed at the lower end portion of the radiating rib 5 has a total length of 30% or less of the total length of the radiating rib 5, and a lower end that is the “side” of the lower end of the triangle. The width of the edge is set to 20% or less of the entire length of the radiating rib 5, so that the chamfered end 6 does not impair the appearance of the container.

下端部８との連設箇所となる角取り端部６の下端縁は、下方に拡幅する三角形の下端の「辺」を形成するので、幅を有することになり、これにより下端部８に対する放射リブ５の下端の連結は、点状ではなく幅をもって達成されることになる。   The lower end edge of the chamfered end portion 6 which is a continuous portion with the lower end portion 8 forms a “side” of the lower end of the triangle that widens downward, and thus has a width, thereby radiating to the lower end portion 8. The connection of the lower ends of the ribs 5 is achieved with a width rather than a point shape.

このように、下端部８に対する放射リブ５の連設部分を、角取り端部６で構成することにより、下端部８に対する放射リブ５の連結は、従来のように点状ではなく、幅を持って達成されることになり、これにより放射リブ５に発生する応力が、点状に局部集中することがなく、分散して作用することになるので、座屈強度が高くなる。   As described above, the connecting portion of the radiating rib 5 with respect to the lower end portion 8 is constituted by the chamfered end portion 6, so that the connection of the radiating rib 5 with respect to the lower end portion 8 is not point-like as in the prior art, but the width is increased. As a result, the stress generated in the radiating rib 5 does not concentrate locally in a point-like manner and acts in a distributed manner, so that the buckling strength is increased.

図４に、図１に示した本発明による容器と、図５に示した従来の容器との、座屈強度試験である、押し下げ荷重が作用した際の容器の全高変位量と荷重との関係を示す、測定結果線図を示す。   FIG. 4 shows a buckling strength test between the container according to the present invention shown in FIG. 1 and the conventional container shown in FIG. 5, and the relationship between the total amount of displacement of the container and the load when a pressing load is applied. The measurement result diagram which shows is shown.

この座屈強度試験において、両容器は、全高が２１５ｍｍ、胴部９の最大径が６８ｍｍ、全内容積が５３１ｍｌ、空状態の重さが２８ｇであり、肩部な陥没部の陥没深さは０．８ｍｍ、そして肩部のテーパー面の曲率半径は１２０ｍｍと同じであるが、本発明の容器にあっては、特有の構成部分である角取り端部６を、その下端縁の幅が３ｍｍとなるように構成している。   In this buckling strength test, the total height of both containers is 215 mm, the maximum diameter of the trunk 9 is 68 mm, the total internal volume is 531 ml, the empty weight is 28 g, and the depression depth of the shoulder depression is The radius of curvature of the tapered surface of the shoulder portion is 0.8 mm, and the radius of curvature of the shoulder portion is the same as 120 mm. However, in the container of the present invention, the chamfered end portion 6, which is a unique component, has a lower end edge width of 3 mm. It is comprised so that.

図４中、特性曲線イは、本発明の容器の測定結果を、特性曲線ロは、従来の容器の測定結果を示しており、測定結果からすると、本発明の容器は、従来の容器と比較して、座屈強度が１５．２％向上した。   In FIG. 4, the characteristic curve A shows the measurement result of the container of the present invention, and the characteristic curve B shows the measurement result of the conventional container. From the measurement result, the container of the present invention is compared with the conventional container. As a result, the buckling strength was improved by 15.2%.

容器の実施形態例を示す、全体正面図である。It is a whole front view which shows the embodiment example of a container. 図１に示した容器の、要部拡大正面図である。It is a principal part enlarged front view of the container shown in FIG. 図１に示した容器の、要部拡大平面図である。It is a principal part enlarged plan view of the container shown in FIG. 従来技術との比較を示す、座屈強度試験結果の特性線図である。It is a characteristic diagram of the buckling strength test result which shows the comparison with a prior art. 従来技術を示す、全体正面図である。It is a whole front view which shows a prior art.

符号の説明Explanation of symbols

１ ；口筒部
２ ；螺条
３ ；ネックリング
４ ；肩部
５ ；放射リブ
６ ；角取り端部
７ ；陥没部
８ ；下端部
９ ；胴部
１０；パネル壁
１１；補強周溝
ａ ；肩部
ｂ ；放射リブ
ｃ ；陥没部
Ａ ；連設部分
イ、ロ ；特性曲線 DESCRIPTION OF SYMBOLS 1; Mouth part 2; Screw 3; Neck ring 4; Shoulder part 5; Radiation rib 6; Chamfered end part 7; Indented part 8; Lower end part 9; Body part 10; Panel wall 11; Shoulder b; Radiation rib c; Depressed part A;

Claims (1)

ボトル状容器のテーパー筒状をした肩部に、下降傾斜した三角突条状の放射リブを複数設け、該放射リブを等中心角毎に配置し、前記各放射リブの下端部の突出端部を、角取りして、下方に拡幅する三角形状の角取り端部に成形した合成樹脂製容器。 A plurality of downwardly inclined triangular protrusion-shaped radiation ribs are provided on the tapered cylindrical shoulder of the bottle-shaped container, and the radiation ribs are arranged at equal central angles, and the projecting ends of the lower ends of the radiation ribs A synthetic resin container formed by chamfering and forming a triangular chamfered end that widens downward.
JP2007021760A 2007-01-31 2007-01-31 Plastic container Active JP4978909B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015101361A (en) * 2013-11-22 2015-06-04 ザ コカ・コーラ カンパニーＴｈｅ Ｃｏｃａ‐Ｃｏｌａ Ｃｏｍｐａｎｙ Plastic bottle
JP2017036053A (en) * 2015-08-07 2017-02-16 東洋製罐株式会社 Bottle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0826239A (en) * 1994-07-20 1996-01-30 Toyo Seikan Kaisha Ltd Buckling-resistant plastic bottle
JP2001341717A (en) * 2000-05-31 2001-12-11 Yoshino Kogyosho Co Ltd Heating and filling bottle
WO2006043347A1 (en) * 2004-10-20 2006-04-27 Universal Can Corporation Method of manufacturing bottle can and bottle can
WO2006120977A1 (en) * 2005-05-10 2006-11-16 Suntory Limited Resin storage container

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0826239A (en) * 1994-07-20 1996-01-30 Toyo Seikan Kaisha Ltd Buckling-resistant plastic bottle
JP2001341717A (en) * 2000-05-31 2001-12-11 Yoshino Kogyosho Co Ltd Heating and filling bottle
WO2006043347A1 (en) * 2004-10-20 2006-04-27 Universal Can Corporation Method of manufacturing bottle can and bottle can
WO2006120977A1 (en) * 2005-05-10 2006-11-16 Suntory Limited Resin storage container

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015101361A (en) * 2013-11-22 2015-06-04 ザ コカ・コーラ カンパニーＴｈｅ Ｃｏｃａ‐Ｃｏｌａ Ｃｏｍｐａｎｙ Plastic bottle
JP2017036053A (en) * 2015-08-07 2017-02-16 東洋製罐株式会社 Bottle

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