JP4553641B2 - Plastic container - Google Patents

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JP4553641B2
JP4553641B2 JP2004189495A JP2004189495A JP4553641B2 JP 4553641 B2 JP4553641 B2 JP 4553641B2 JP 2004189495 A JP2004189495 A JP 2004189495A JP 2004189495 A JP2004189495 A JP 2004189495A JP 4553641 B2 JP4553641 B2 JP 4553641B2
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plastic container
circumferential
circumferential protrusion
pushed
grounding
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崎 達 也 野
藤 嘉 則 佐
田 美 恵 太
川 正 浩 吉
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Dai Nippon Printing Co Ltd
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Description

本発明は、プラスチック容器に係り、とりわけ底部を容易に変形させることができるプラスチック容器に関する。   The present invention relates to a plastic container, and more particularly to a plastic container whose bottom can be easily deformed.

従来より口部と、胴部と、底部とを有するプラスチック容器が知られている。このようなプラスチック容器においては、底部を押上げて変形させた状態で、低温状態で内容物を充てんしている。例えば特許文献１参照（実開昭５８−１８３３０８号）。   Conventionally, a plastic container having a mouth portion, a trunk portion, and a bottom portion is known. In such a plastic container, the contents are filled in a low temperature state with the bottom portion pushed up and deformed. For example, see Patent Document 1 (Japanese Utility Model Publication No. 58-183308).

同じ容量の容器に対して、ホット充てんは冷却後減圧する事により液面が上昇する。一方無菌充てんは、常温充てんする為減圧せず液面が上昇しない。充てん方法の違いによる液面の高さを調整する為に底部を押上げているが、従来のプラスチック容器の場合、底部の押上げにあたっては大きな押上力を必要としている。   In the case of a container having the same capacity, hot filling raises the liquid level by reducing the pressure after cooling. On the other hand, aseptic filling is performed at room temperature, the liquid level does not increase without reducing the pressure. The bottom is pushed up in order to adjust the height of the liquid level depending on the filling method. In the case of a conventional plastic container, a large pushing force is required to push up the bottom.

他方、内容物を保温するためプラスチック容器を加熱する場合、予めプラスチック容器を減圧させると便利なことがある。   On the other hand, when heating the plastic container to keep the contents warm, it may be convenient to depressurize the plastic container in advance.

本発明は、このような点を考慮してなされたものであり、底部を容易に変形させることができるプラスチック容器を提供することを目的とする。   The present invention has been made in consideration of such points, and an object of the present invention is to provide a plastic container whose bottom can be easily deformed.

本発明は、口部と、胴部と、陥没部を有する底部とを備え、底部は陥没部の周縁に沿って配置された接地部と、外方へ突出する円周突部とを有し、この円周突部は底部を内側へ押圧した際に底部がへこむ基部となって底部を上方へ押上げることができ、円周突部は接地部の半径方向外側に位置し、円周突部と接地部との間に平坦面が形成され、胴部の下方部に円周方向に延びる横リブが設けられ、横リブと円周突部との間に、外方へ突出する湾曲面が形成されていることを特徴とするプラスチック容器である。 The present invention includes a mouth portion, a trunk portion, and a bottom portion having a depressed portion, and the bottom portion includes a grounding portion disposed along a peripheral edge of the depressed portion, and a circumferential protrusion protruding outward. When the bottom is pressed inward, the circumferential protrusion becomes a base that is recessed, and the bottom can be pushed upward.The circumferential protrusion is located radially outside the grounding portion , and the circumferential protrusion A curved surface is formed between the horizontal rib and the circumferential protrusion, and a flat surface is formed between the horizontal rib and the grounding portion, and a lateral rib extending in the circumferential direction is provided at a lower portion of the body portion. Is a plastic container characterized by being formed.

本発明によれば、底部を容易に押上げて変形させることができる。このため常温充てん時に容易に底部を押上げた状態で充てんすることができ、かつ容器の減圧時に底部を変形させて、この減圧を容易に吸収することができる。   According to the present invention, the bottom can be easily pushed up and deformed. For this reason, it can be filled with the bottom pushed up easily when filling at room temperature, and the bottom can be deformed when the container is depressurized to easily absorb this depressurization.

第１の実施の形態
以下、図面を参照して本発明の第１の実施の形態について説明する。図１および図２は本発明によるプラスチック容器の一実施の形態を示す図である。 First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. 1 and 2 are views showing an embodiment of a plastic container according to the present invention.

図１および図２に示すように、プラスチック容器１０は全体として円筒状をなすとともに、ＰＥＴをブロー成形することにより形成される。このようなプラスチック容器１０は、口部１１と、胴部１２と、陥没部１３ｄを有する底部１３とを備えている。このうち胴部１２には内圧の増減により胴部１２を容易に変形させるための複数の凹部１２ａが形成されている。   As shown in FIGS. 1 and 2, the plastic container 10 has a cylindrical shape as a whole and is formed by blow molding PET. Such a plastic container 10 includes a mouth part 11, a body part 12, and a bottom part 13 having a depressed part 13d. Among these, the body part 12 is formed with a plurality of recesses 12a for easily deforming the body part 12 by increasing or decreasing the internal pressure.

さらに胴部１２の下方部に円周方向に延びる横リブ２１が設けられ、この横リブ２１により胴部１２の強度を補強している。   Further, a lateral rib 21 extending in the circumferential direction is provided at a lower portion of the body portion 12, and the strength of the body portion 12 is reinforced by the lateral rib 21.

また底部１３は、テーブル等の装置台に当接するとともに、陥没部１３ｄ周縁に円周方向に延びる接地部１３ａと、接地部１３ａの半径方向外側に位置する円周突部１３ｂとを有している。円周突部１３ｂは底部１３の円周方向にわたって形成され、底部１３から外方へ突出している。この円周突部１３ｂは後述のように底部１３を押上げた場合に、底部１３が内方へへこむ際の基部として機能する。なお、図２に示すように、円周突部１３ｂは底部１３の周縁近傍に配置されている。   In addition, the bottom portion 13 abuts on a table such as a table, and has a grounding portion 13a that extends in the circumferential direction around the depressed portion 13d, and a circumferential protrusion 13b that is positioned radially outward of the grounding portion 13a. Yes. The circumferential protrusion 13 b is formed over the circumferential direction of the bottom portion 13 and protrudes outward from the bottom portion 13. The circumferential protrusion 13b functions as a base when the bottom 13 is recessed inward when the bottom 13 is pushed up as described later. As shown in FIG. 2, the circumferential protrusion 13 b is disposed in the vicinity of the periphery of the bottom portion 13.

また接地部１３ａと円周突部１３ｂとの間には、平坦面１３ｃが円周方向に沿って形成されている。   A flat surface 13c is formed along the circumferential direction between the grounding portion 13a and the circumferential protrusion 13b.

次にこのような構成からなる本実施の形態の作用について説明する。   Next, the operation of the present embodiment having such a configuration will be described.

プラスチック容器１０内に内容物を常温充てんする場合、容器１０の底部１３が押上げられ、この状態で内容物が容器１０内に注入される。   When filling the plastic container 10 with the contents at room temperature, the bottom 13 of the container 10 is pushed up, and the contents are poured into the container 10 in this state.

その後、口部１１がキャップ（図示せず）により容閉され、容器１０内は減圧状態に保たれる。   Thereafter, the mouth portion 11 is closed with a cap (not shown), and the inside of the container 10 is kept in a reduced pressure state.

上述したように内容物の充てん時に、底部１３が押上げられるが、本実施の形態によれば、接地部１３ａの半径方向外側に、外方へ突出する円周突部１３ｂが設けられているため、底部１３を容易に上方へ押上げることができる。   As described above, when the contents are filled, the bottom 13 is pushed up. According to the present embodiment, a circumferential protrusion 13b that protrudes outward is provided on the outer side in the radial direction of the grounding part 13a. Therefore, the bottom 13 can be easily pushed upward.

すなわち、底部１３を押上げる際、円周突部１３ｂが内方へへこむ際の基部となって、底部１３全体を容易に押上げることができる。   In other words, when the bottom portion 13 is pushed up, the circumferential protrusion 13b becomes a base portion when it is recessed inward, and the entire bottom portion 13 can be pushed up easily.

次に図３および図４により本発明の変形例について説明する。図３および図４に示す変形例において、円周突部１３ｂは、底部１３の周縁よりも接地部１３ｃ近傍に接近した位置に設けられている。   Next, a modification of the present invention will be described with reference to FIGS. In the modification shown in FIGS. 3 and 4, the circumferential protrusion 13 b is provided at a position closer to the vicinity of the grounding portion 13 c than the periphery of the bottom portion 13.

図３および図４において、他の構成は図１および図２に示す実施の形態と略同一である。   3 and 4, other configurations are substantially the same as those of the embodiment shown in FIGS. 1 and 2.

また図３において、接地部１３ａと円周突部１３ｂとの間に設けられた平坦面１３ｃの傾斜角αは１６°となっており、図４において平坦面１３ｃの傾斜角αは１０°となっている。   In FIG. 3, the inclination angle α of the flat surface 13c provided between the grounding portion 13a and the circumferential protrusion 13b is 16 °. In FIG. 4, the inclination angle α of the flat surface 13c is 10 °. It has become.

次に本発明の具体的実施例について説明する。   Next, specific examples of the present invention will be described.

まず図１および図２に示す実施の形態に対応するプラスチック容器１０を準備し（実施例１−１）、図３に示す実施の形態に対応するプラスチック容器１０を準備し（実施例１−２）、図４に示す実施の形態に対応するプラスチック容器１０を準備した（実施例１−３）。   First, a plastic container 10 corresponding to the embodiment shown in FIGS. 1 and 2 is prepared (Example 1-1), and a plastic container 10 corresponding to the embodiment shown in FIG. 3 is prepared (Example 1-2). ), A plastic container 10 corresponding to the embodiment shown in FIG. 4 was prepared (Example 1-3).

次に比較例として、図５に示すように外方へ突出する円周突部を設けていない従来形のプラスチック容器１０を準備した（比較例１−１）。また図６に示すように、接地部１３ａの半径方向内側に、内方へ引込む円周状の凹部１５を設けたプラスチック容器１０を準備した（比較例１−２）。さらに図７に示すように、接地部１３ａの半径方向内側に、円周突部１３ｂを設けたプラスチック容器１０を準備した（比較例１−３）。図７に示す比較例１−３において平坦面１３ｃの傾斜角αは７°〜１４°となっている。   Next, as a comparative example, a conventional plastic container 10 without a circumferential protrusion protruding outward as shown in FIG. 5 was prepared (Comparative Example 1-1). Moreover, as shown in FIG. 6, the plastic container 10 which provided the circumferential recessed part 15 drawn inward in the radial direction inner side of the grounding part 13a was prepared (Comparative Example 1-2). Further, as shown in FIG. 7, a plastic container 10 provided with a circumferential protrusion 13b on the radially inner side of the grounding portion 13a was prepared (Comparative Example 1-3). In Comparative Example 1-3 shown in FIG. 7, the inclination angle α of the flat surface 13c is 7 ° to 14 °.

次に上記実施例１−１〜１−３および比較例１−１〜１−３のプラスチック容器１０に対して、底部１３の押上試験を行なった。さらに、実施例１−１〜１−３および比較例１−１〜１−３のプラスチック容器１０に対して、８５℃のお湯を充てんした後、減圧現象を確認する減圧吸収試験を行なった。この減圧吸収試験では底部１３の上昇を確認した。上昇は充てん前後のボトルの高さの違いで判断した。０．１５ｍｍ以上の差があれば良好と判断した。   Next, a push-up test of the bottom portion 13 was performed on the plastic containers 10 of Examples 1-1 to 1-3 and Comparative Examples 1-1 to 1-3. Furthermore, after filling the plastic containers 10 of Examples 1-1 to 1-3 and Comparative Examples 1-1 to 1-3 with 85 ° C. hot water, a reduced pressure absorption test for confirming the reduced pressure phenomenon was performed. In this reduced pressure absorption test, the rise of the bottom 13 was confirmed. The rise was judged by the difference in the height of the bottle before and after filling. A difference of 0.15 mm or more was judged good.

これらの結果を下記に示す。

Figure 0004553641
These results are shown below.
Figure 0004553641

上記試験結果より明らかなように、実施例１−１〜１−３においては、比較例１−１〜１−３に比べて、（１）小さな荷重により底部を押上げることができた。（２）また減圧時に底部が良好に上昇した。   As apparent from the above test results, in Examples 1-1 to 1-3, compared with Comparative Examples 1-1 to 1-3, (1) the bottom portion could be pushed up with a small load. (2) Also, the bottom rose well during decompression.

本発明によるプラスチック容器の一実施の形態を示す概略図。Schematic which shows one Embodiment of the plastic container by this invention. 本発明によるプラスチック容器の底部を示す図。The figure which shows the bottom part of the plastic container by this invention. 本発明によるプラスチック容器の底部の変形例を示す図。The figure which shows the modification of the bottom part of the plastic container by this invention. 本発明によるプラスチック容器の底部の変形例を示す図。The figure which shows the modification of the bottom part of the plastic container by this invention. プラスチック容器の比較例を示す図。The figure which shows the comparative example of a plastic container. プラスチック容器の比較例を示す図。The figure which shows the comparative example of a plastic container. プラスチック容器の比較例を示す図。The figure which shows the comparative example of a plastic container.

１０ プラスチック容器
１１ 口部
１２ 胴部
１３ 底部
１３ａ 接地部
１３ｂ 円周突部
１３ｃ 平坦面 DESCRIPTION OF SYMBOLS 10 Plastic container 11 Mouth part 12 Trunk part 13 Bottom part 13a Grounding part 13b Circumferential protrusion 13c Flat surface

Claims (1)

口部と、
胴部と、
陥没部を有する底部とを備え、
底部は陥没部の周縁に沿って配置された接地部と、外方へ突出する円周突部とを有し、この円周突部は底部を内側へ押圧した際に底部がへこむ基部となって底部を上方へ押上げることができ、
円周突部は接地部の半径方向外側に位置し、
円周突部と接地部との間に平坦面が形成され、
胴部の下方部に円周方向に延びる横リブが設けられ、
横リブと円周突部との間に、外方へ突出する湾曲面が形成されていることを特徴とするプラスチック容器。 The mouth,
The torso,
A bottom portion having a depression,
Becomes the bottom and the ground portion arranged along the periphery of the recess, and a circumferential projection projecting outwardly, the circumferential projection to the bottom dented base upon pressing the bottom to the inside Can push the bottom upward.
The circumferential protrusion is located radially outside the ground contact portion,
A flat surface is formed between the circumferential protrusion and the grounding portion,
A lateral rib extending in the circumferential direction is provided in the lower part of the body part,
A plastic container characterized in that a curved surface protruding outward is formed between the lateral rib and the circumferential protrusion.
JP2004189495A 2004-06-28 2004-06-28 Plastic container Active JP4553641B2 (en)

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5602347B2 (en) * 2008-08-01 2014-10-08 大日本印刷株式会社 Plastic bottle
CA2744850C (en) 2008-11-27 2017-03-07 Yoshino Kogyosho Co., Ltd. Synthetic resin bottle
US8444002B2 (en) * 2010-02-19 2013-05-21 Graham Packaging Lc, L.P. Pressure compensating bases for polymeric containers
JP6131629B2 (en) * 2012-02-28 2017-05-24 大日本印刷株式会社 Plastic bottle
WO2013129500A1 (en) * 2012-02-28 2013-09-06 大日本印刷株式会社 Plastic bottle
JP6443712B2 (en) * 2013-12-27 2018-12-26 大日本印刷株式会社 Blow molded plastic bottle
JP2015199521A (en) * 2014-04-08 2015-11-12 大日本印刷株式会社 Blow molding plastic bottle
JP2019137453A (en) * 2018-02-15 2019-08-22 アサヒ飲料株式会社 Round cylindrical plastic bottle

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58183308U (en) * 1982-05-31 1983-12-06 青木　固 Bottom structure of pressure-resistant synthetic resin container
JPS61188906U (en) * 1985-05-16 1986-11-25
JPS63120631A (en) * 1986-11-11 1988-05-25 Yoshino Kogyosho Co Ltd Method for forming bottom of biaxially stretching molded vessel
JPH0343410U (en) * 1989-09-07 1991-04-23
JPH0397013U (en) * 1990-01-23 1991-10-04
JP2003160123A (en) * 2001-07-31 2003-06-03 Asahi Soft Drinks Co Ltd Resin-made container, manufacturing method for the same, and beverage filled therein
JP2003191928A (en) * 2001-12-28 2003-07-09 Yoshino Kogyosho Co Ltd Bottle-type container made of synthetic resin
WO2003057573A1 (en) * 2001-12-21 2003-07-17 Ball Corporation Plastic bottle with champagne base
JP2003226319A (en) * 2002-01-31 2003-08-12 Yoshino Kogyosho Co Ltd Thin bottle container made of synthetic resin

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58183308U (en) * 1982-05-31 1983-12-06 青木　固 Bottom structure of pressure-resistant synthetic resin container
JPS61188906U (en) * 1985-05-16 1986-11-25
JPS63120631A (en) * 1986-11-11 1988-05-25 Yoshino Kogyosho Co Ltd Method for forming bottom of biaxially stretching molded vessel
JPH0343410U (en) * 1989-09-07 1991-04-23
JPH0397013U (en) * 1990-01-23 1991-10-04
JP2003160123A (en) * 2001-07-31 2003-06-03 Asahi Soft Drinks Co Ltd Resin-made container, manufacturing method for the same, and beverage filled therein
WO2003057573A1 (en) * 2001-12-21 2003-07-17 Ball Corporation Plastic bottle with champagne base
JP2003191928A (en) * 2001-12-28 2003-07-09 Yoshino Kogyosho Co Ltd Bottle-type container made of synthetic resin
JP2003226319A (en) * 2002-01-31 2003-08-12 Yoshino Kogyosho Co Ltd Thin bottle container made of synthetic resin

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