JP6759540B2 - Bottle - Google Patents

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JP6759540B2
JP6759540B2 JP2015156840A JP2015156840A JP6759540B2 JP 6759540 B2 JP6759540 B2 JP 6759540B2 JP 2015156840 A JP2015156840 A JP 2015156840A JP 2015156840 A JP2015156840 A JP 2015156840A JP 6759540 B2 JP6759540 B2 JP 6759540B2
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bottle
curved
shoulder
central axis
mouth
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JP2017036053A (en
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和志 松清
和志 松清
三浦 正樹
正樹 三浦
祐太 村山
祐太 村山
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Toyo Seikan Kaisha Ltd
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Toyo Seikan Kaisha Ltd
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Description

本発明は、ボトルに関するものである。 The present invention relates to bottles.

液体収容物の容器は、瓶からの置き換えとして合成樹脂製ボトル、特にPETボトルの需要が多くなっている。瓶とは異なり、合成樹脂製ボトルは、熱間充填することによって密封後に起きる減圧に対して、減圧吸収をすることでボトル形状を保持することが必要になる。 As for containers for liquid containers, there is a growing demand for synthetic resin bottles, especially PET bottles, as a replacement for bottles. Unlike bottles, synthetic resin bottles need to retain their bottle shape by absorbing reduced pressure against the reduced pressure that occurs after sealing by hot filling.

減圧吸収をするためのボトル構成としては、ボトルの胴部や底部に減圧吸収パネルを設けることが知られている。 As a bottle configuration for decompression absorption, it is known that a decompression absorption panel is provided on the body and bottom of the bottle.

下記特許文献1に記載された従来技術は、ボトル底部の底壁部には、外周縁部に位置する接地部と、接地部に連なる立ち上がり周壁部と、立ち上がり周壁部から内側に形成される可動壁部と、可動壁部から上方に向けて延びる内周壁部を設け、ボトル内減圧時に、可動壁部が内周壁部を上方に向けて移動させることで減圧吸収を行い、ボトルの肩部には、全周に亘って補強溝を設けて、ボトル内減圧時に肩部がボトルの内側に凹むのを抑止している。 According to the prior art described in Patent Document 1 below, the bottom wall portion of the bottom of the bottle has a ground contact portion located at the outer peripheral edge portion, a rising peripheral wall portion connected to the ground contact portion, and a movable portion formed inward from the rising peripheral wall portion. A wall portion and an inner peripheral wall portion extending upward from the movable wall portion are provided, and when the pressure inside the bottle is reduced, the movable wall portion moves the inner peripheral wall portion upward to absorb the decompression and absorb the pressure on the shoulder of the bottle. Is provided with a reinforcing groove over the entire circumference to prevent the shoulder portion from being dented inside the bottle when the pressure inside the bottle is reduced.

特開2012−91829号公報Japanese Unexamined Patent Publication No. 2012-91829

前述した従来技術は、ボトル内減圧時に、肩部がボトルの内側に凹むのを抑止する補強溝を肩部全周に亘って設けているが、この補強溝によってボトルに加わる縦荷重に対しては、座屈変形し易い構造になっている。PETボトルなどの合成樹脂製ボトルは、軽量化が進んでおり、肉厚が薄くなることで縦横方向からの負荷に対して変形し易くなっている。特に、ボトルは積み重ねて搬送することが多く、縦荷重に対して座屈変形に耐える構造が求められている。 In the above-mentioned conventional technique, a reinforcing groove is provided over the entire circumference of the shoulder to prevent the shoulder from being dented inside the bottle when the pressure inside the bottle is reduced. However, the vertical load applied to the bottle by this reinforcing groove is Has a structure that is easily buckled and deformed. Synthetic resin bottles such as PET bottles are becoming lighter and thinner, and are more likely to be deformed by a load from the vertical and horizontal directions. In particular, bottles are often stacked and transported, and a structure that can withstand buckling deformation with respect to a vertical load is required.

また、前述した従来技術のように、肩部全周に亘って補強溝を設けたものでは、口部を下に向けて液体収容物を口部から吐出する際に、補強溝によって形成される内側に向けた突起に液体収容物が溜まり、残液量が増加してしまう問題が生じる。 Further, in the case where the reinforcing groove is provided over the entire circumference of the shoulder portion as in the above-mentioned conventional technique, the reinforcing groove is formed when the liquid container is discharged from the mouth portion with the mouth portion facing downward. There is a problem that the liquid content accumulates on the protrusions facing inward and the amount of residual liquid increases.

本発明は、このような問題に対処することを課題の一例とするものである。すなわち、縦荷重に対しての座屈変形を抑制し、また、残液量の増加を抑止したボトルを提供することが本発明の目的である。 The present invention makes it an example of a problem to deal with such a problem. That is, it is an object of the present invention to provide a bottle that suppresses buckling deformation with respect to a vertical load and suppresses an increase in the amount of residual liquid.

このような目的を達成するために、本発明によるボトルは、以下の構成を具備するものである。
口部と肩部と胴部と底部を有した合成樹脂製のボトルであって、前記肩部の周方向には、前記口部に向けて山形に湾曲した湾曲部分を前記ボトルの中心軸方向に複数有すると共に一つの前記湾曲部分と他の前記湾曲部分の間に前記胴部に向いた角部を有する稜線が設けられ、前記稜線によって、前記肩部の周囲に段差部又は溝部が形成されており、前記ボトルは、前記中心軸に垂直な横断面の外形が円形状であることを特徴とするボトル。
In order to achieve such an object, the bottle according to the present invention has the following configuration.
A synthetic resin bottle having a mouth, shoulders, body and bottom, and in the circumferential direction of the shoulder, a curved portion curved in a chevron shape toward the mouth is directed toward the central axis of the bottle. A ridge line having a plurality of portions and having a corner portion facing the body portion is provided between one said curved portion and the other said curved portion, and the ridge line forms a stepped portion or a groove portion around the shoulder portion. The bottle is characterized in that the outer shape of the cross section perpendicular to the central axis is circular.

このような特徴を有する本発明のボトルは、肩部に、口部に向けて山形に湾曲した稜線を設けているので、稜線が縦荷重に対しての補強構造となり、縦荷重に対しての座屈変形を抑制することができる。また、湾曲した稜線によって、残液量の増加を抑止することができる。 The bottle of the present invention having such characteristics has a ridge line curved in a chevron shape toward the mouth on the shoulder, so that the ridge line becomes a reinforcing structure against a vertical load and is resistant to a vertical load. Buckling deformation can be suppressed. In addition, the curved ridgeline can suppress an increase in the amount of residual liquid.

本発明の実施形態に係るボトルの側面図である。It is a side view of the bottle which concerns on embodiment of this invention. 本発明の実施形態に係るボトルの平面図と底面図((a)が平面図であり、(b)が底面図)である。A plan view and a bottom view of the bottle according to the embodiment of the present invention ((a) is a plan view and (b) is a bottom view). 図1におけるX−X断面図である。FIG. 5 is a cross-sectional view taken along the line XX in FIG. 本発明の他の実施形態に係るボトルの側面図である。It is a side view of the bottle which concerns on other embodiment of this invention. 図4におけるX−X断面図である。FIG. 5 is a cross-sectional view taken along the line XX in FIG.

以下、図面を参照して本発明の実施形態を説明する。図1〜図3に示すように、本発明の実施形態に係るボトル1は、PETなどの合成樹脂材料で一体に成形された有底の容器であり、口部11、肩部12、胴部13、底部14を備えている。図示の例では、ボトル1は、中心軸Oに対して軸対称な形状を有しており、中心軸Oに垂直な横断面の外形が円形状になっている。ボトル1は、例えば、射出成形された有底筒状のプリフォームをブロー成形して形成することができる。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, the bottle 1 according to the embodiment of the present invention is a bottomed container integrally molded of a synthetic resin material such as PET, and has a mouth portion 11, a shoulder portion 12, and a body portion. It has 13 and a bottom 14. In the illustrated example, the bottle 1 has a shape symmetrical with respect to the central axis O, and the outer shape of the cross section perpendicular to the central axis O has a circular shape. The bottle 1 can be formed, for example, by blow molding an injection-molded bottomed tubular preform.

ボトル1の口部11は、図示省略したキャップが装着される円筒状の硬質部であり、図示の形態に限らず、外周にネジ部を形成したものなどであってもよい。 The mouth portion 11 of the bottle 1 is a cylindrical hard portion to which a cap (not shown) is attached, and is not limited to the illustrated form, and may have a screw portion formed on the outer periphery thereof.

ボトル1の肩部12は、口部11より下側の部分であり、上方から下方に向かうに従って漸次拡径されている。肩部12における上下方向の外郭形状は、図1に示すように内側に向けて凸状の湾曲形状であっても、それとは逆に外側に向けて凸状の湾曲形状であっても、直線形状であってもよい。 The shoulder portion 12 of the bottle 1 is a portion below the mouth portion 11, and the diameter is gradually increased from the upper side to the lower side. The vertical outer shape of the shoulder portion 12 is a straight line regardless of whether it is a curved shape that is convex inward as shown in FIG. 1 or conversely a curved shape that is convex outward. It may be in shape.

ボトル1における肩部12の周方向には、口部11に向けて山形に湾曲した稜線10が設けられている。稜線10の湾曲部分10aは、口部11に向けて山形に湾曲したものであり、ここでは複数の(中心軸O周りに8つの)湾曲部分10aが連なって環状の稜線10を形成している。一つの稜線10は、一つの湾曲部分10aと他の湾曲部分10aとの繋がり部分において、胴部13に向いた角部10bを有している。一つの稜線10における湾曲部分10aは、均等に複数設けられ、その数は6〜12個の範囲で適宜設定することができる。肩部12は、稜線10を形成しているが、湾曲していることにより、内容液が口部へ流れ易くなる内面形状になり、残留量の増加を抑止することができる。 A ridge line 10 curved in a chevron shape toward the mouth portion 11 is provided in the circumferential direction of the shoulder portion 12 in the bottle 1. The curved portion 10a of the ridge line 10 is curved in a chevron shape toward the mouth portion 11, and here, a plurality of curved portions 10a (eight around the central axis O) are connected to form an annular ridge line 10. .. One ridge line 10 has a corner portion 10b facing the body portion 13 at a connecting portion between one curved portion 10a and another curved portion 10a. A plurality of curved portions 10a on one ridge line 10 are evenly provided, and the number thereof can be appropriately set in the range of 6 to 12. The shoulder portion 12 forms a ridge line 10, but since it is curved, it has an inner surface shape that facilitates the flow of the content liquid to the mouth portion, and an increase in the residual amount can be suppressed.

中心軸O周りに環状に設けられる稜線10は、上下方向に一つ又は複数設けられる。図示の例では、稜線10は複数設けられており、図3に示すように、4つの稜線10によって、一つの溝部20が形成されている。溝部20は、稜線10の湾曲部10aと角部10bに沿った形状を有して中心軸O周りに環状に形成されている。 One or a plurality of ridge lines 10 provided in an annular shape around the central axis O are provided in the vertical direction. In the illustrated example, a plurality of ridge lines 10 are provided, and as shown in FIG. 3, one groove portion 20 is formed by the four ridge lines 10. The groove portion 20 has a shape along the curved portion 10a and the corner portion 10b of the ridge line 10, and is formed in an annular shape around the central axis O.

図3に示されるように、一つの溝部20は、肩部12の外郭面12Aから内側に向けて立ち上がる下壁部20Aと上壁部20Bを有しており、下壁部20Aと上壁部20Bの間に側壁部20Cを有している。ここで、肩部12の外郭面12Aに対する下壁部20Aの立ち上がり角θは、鈍角になるように形成されている。このように、立ち上がり角θを鈍角にすることで、肩部12は、液溜まりを形成し難い内面形状になり、より残留量の増加を抑止することができる。 As shown in FIG. 3, one groove portion 20 has a lower wall portion 20A and an upper wall portion 20B that rise inward from the outer surface surface 12A of the shoulder portion 12, and the lower wall portion 20A and the upper wall portion 20A. It has a side wall portion 20C between 20B. Here, the rising angle θ of the lower wall portion 20A with respect to the outer surface surface 12A of the shoulder portion 12 is formed to be an obtuse angle. By making the rising angle θ obtuse in this way, the shoulder portion 12 has an inner surface shape in which it is difficult to form a liquid pool, and an increase in the residual amount can be further suppressed.

ボトル1の胴部13は、中心軸Oに沿って略同径の円筒部分である。図示の例では、中心軸O周りに環状凹部13Aが設けられているが、特にこの形態に限定されるものではない。胴部13にこのような環状凹部13Aを単数又は複数設けることで、ボトル内減圧時に胴部の変形を抑制し、横荷重に対する剛性を付与することができる。 The body portion 13 of the bottle 1 is a cylindrical portion having substantially the same diameter along the central axis O. In the illustrated example, the annular recess 13A is provided around the central axis O, but the present invention is not particularly limited to this form. By providing one or a plurality of such annular recesses 13A in the body portion 13, deformation of the body portion can be suppressed during decompression in the bottle, and rigidity against a lateral load can be imparted.

ボトル1の底部14は、外周に接地部14Aを有し、接地部14Aの内径側に中心軸Oに沿って内側に立ち上がる内周壁部14Bを有する。そして、内周壁部14Bの内径側には、減圧吸収機能を有する可動底壁部14Cが設けられている。この例では、ボトル1の底部14に減圧吸収機能を付与している。 The bottom portion 14 of the bottle 1 has a ground contact portion 14A on the outer circumference, and an inner peripheral wall portion 14B rising inward along the central axis O on the inner diameter side of the ground contact portion 14A. A movable bottom wall portion 14C having a decompression absorption function is provided on the inner diameter side of the inner peripheral wall portion 14B. In this example, the bottom 14 of the bottle 1 is provided with a decompression absorption function.

このようなボトル1によると、肩部12に設けた稜線10の湾曲部分10aが、縦荷重に対してアーチ状に形成されているので、横方向のみならず、縦方向にも、剛性を付与することが可能となり、更に縦荷重に対しての座屈変形を抑制することができる。特に、稜線10が口部11に向けて山形に湾曲した湾曲部分10aを有して、胴部13に向けて山形に湾曲する部分を有していないので、上方から口部11に加わる縦荷重に対して高い変形抑制機能を得ることができる。また、稜線10における一つの湾曲部分10aと、他の湾曲部分10aとの間が胴部13に向いた角部10bになっているので、角部10bが補強構造となり、肩部12の変形を抑えることができる。 According to such a bottle 1, since the curved portion 10a of the ridge line 10 provided on the shoulder portion 12 is formed in an arch shape with respect to a vertical load, rigidity is imparted not only in the horizontal direction but also in the vertical direction. Further, buckling deformation with respect to a vertical load can be suppressed. In particular, since the ridge line 10 has a curved portion 10a curved in a chevron shape toward the mouth portion 11 and does not have a portion curved in a chevron shape toward the body portion 13, a vertical load applied to the mouth portion 11 from above. It is possible to obtain a high deformation suppressing function. Further, since one curved portion 10a on the ridge line 10 and the other curved portion 10a form a corner portion 10b facing the body portion 13, the corner portion 10b becomes a reinforcing structure and the shoulder portion 12 is deformed. It can be suppressed.

また、肩部12に設けた稜線10によって溝部20を形成することで、ボトル内減圧時には、溝部20が肩部12の内側への凹みを抑制してボトル1の形状を保持することが可能になる。 Further, by forming the groove 20 by the ridge line 10 provided on the shoulder 12, the groove 20 can suppress the inward dent of the shoulder 12 and maintain the shape of the bottle 1 when the pressure inside the bottle is reduced. Become.

図4及び図5は、本発明の他の実施形態に係るボトル1を示している。前述した実施形態と共通する部位には同一符号を付して重複説明を省略する。この実施形態のボトル1は、肩部12に設けた稜線10によって、肩部12に段差部21が形成されている。一つの段差部21は、中心軸O周りの2つの稜線10によって形成されており、更に複数の稜線10によって複数の段差部21を形成することができる。 4 and 5 show the bottle 1 according to another embodiment of the present invention. The same reference numerals are given to the parts common to the above-described embodiments, and duplicate description will be omitted. In the bottle 1 of this embodiment, the step portion 21 is formed on the shoulder portion 12 by the ridge line 10 provided on the shoulder portion 12. One step portion 21 is formed by two ridge lines 10 around the central axis O, and a plurality of step portions 21 can be further formed by a plurality of ridge lines 10.

このような段差部21を形成する稜線10も、前述した実施形態と同様に口部11に向けて山形に湾曲した湾曲部分10aを有しているので、前述した実施形態と同様に、縦荷重に対して高い変形抑制機能を得ることができ、また、段差部21による補強構造で、ボトル内減圧時にも、肩部12の内側への凹みを抑え、ボトル1の形状を保持することができる。 Since the ridge line 10 forming such a step portion 21 also has a curved portion 10a curved in a chevron shape toward the mouth portion 11 as in the above-described embodiment, the vertical load is the same as in the above-described embodiment. In addition, a high deformation suppressing function can be obtained, and the reinforced structure by the stepped portion 21 suppresses an inward dent of the shoulder portion 12 even when the pressure inside the bottle is reduced, and the shape of the bottle 1 can be maintained. ..

このようなボトル1によると、図5に示すように、段差部21が形成されるので、ボトル1内の液体収容物は液溜まり無く肩部12を通過して口部11から吐出されることになり、縦荷重に対しての座屈変形抑制効果を得ながら、残液量の増加を抑止することができる。 According to such a bottle 1, as shown in FIG. 5, a step portion 21 is formed, so that the liquid container in the bottle 1 passes through the shoulder portion 12 without collecting liquid and is discharged from the mouth portion 11. Therefore, it is possible to suppress an increase in the amount of residual liquid while obtaining the effect of suppressing buckling deformation with respect to a vertical load.

以上説明したように、本発明の実施形態に係るボトル1は、肩部12に設けた稜線10の上向き湾曲形状によって、縦荷重に対して変形し難いボトルを得ることができる。また、従来から知られている胴部13や底部14に設ける減圧吸収構造に加えて、肩部12においても稜線10を組み合わせた溝部20や段差部21によって、効果的にボトル1の減圧時の肩部12の変形を抑制することができる。更には、稜線10が角部10bを有することで、角部10bが補強構造となり、肩部12の変形を抑え、ボトル形状の保持が可能になる。 As described above, the bottle 1 according to the embodiment of the present invention can obtain a bottle that is not easily deformed by a vertical load due to the upward curved shape of the ridge line 10 provided on the shoulder portion 12. Further, in addition to the conventionally known decompression absorption structure provided on the body portion 13 and the bottom portion 14, the groove portion 20 and the step portion 21 combined with the ridge line 10 also on the shoulder portion 12 effectively reduce the pressure of the bottle 1. Deformation of the shoulder portion 12 can be suppressed. Further, since the ridge line 10 has the corner portion 10b, the corner portion 10b has a reinforcing structure, the deformation of the shoulder portion 12 is suppressed, and the bottle shape can be maintained.

また、これらの効果に加えて、湾曲した稜線10を形成すること、さらに稜線10により形成した溝部20の肩部12の外郭面12Aに対する下壁部20Aの立ち上がり角θを鈍角にすること、或いは前述した段差部21とすることで、肩部12は、液溜まりを形成し難い内面形状になり、残液量の増加を抑止することができる。 Further, in addition to these effects, the curved ridge line 10 is formed, and the rising angle θ of the lower wall portion 20A with respect to the outer surface surface 12A of the shoulder portion 12 of the groove portion 20 formed by the ridge line 10 is obtuse. By forming the step portion 21 described above, the shoulder portion 12 has an inner surface shape in which it is difficult to form a liquid pool, and an increase in the amount of residual liquid can be suppressed.

以上、本発明の実施の形態について図面を参照して詳述してきたが、具体的な構成はこれらの実施の形態に限られるものではなく、本発明の要旨を逸脱しない範囲の設計の変更等があっても本発明に含まれる。また、上述の各実施の形態は、その目的及び構成等に特に矛盾や問題がない限り、互いの技術を流用して組み合わせることが可能である。 Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the design changes, etc. within the range not deviating from the gist of the present invention, etc. Even if there is, it is included in the present invention. Further, the above-described embodiments can be combined by diverting the technologies of each other as long as there is no particular contradiction or problem in the purpose and configuration thereof.

1:ボトル,
10:稜線,10a:湾曲部分,10b:角部,
11:口部,
12:肩部,12A:外郭面,
13:胴部,13A:環状凹部,
14:底部,14A:接地部,14B:内周壁部,14C:可動底壁部,
20:溝部,20A:下壁部,20B:上壁部,側壁部20C,
21:段差部,
O:中心軸,θ:立ち上がり角
1: Bottle,
10: Ridge line, 10a: Curved part, 10b: Corner part,
11: Mouth,
12: Shoulder, 12A: Outer surface,
13: Body, 13A: Circular recess,
14: Bottom, 14A: Grounding part, 14B: Inner peripheral wall part, 14C: Movable bottom wall part,
20: Groove, 20A: Lower wall, 20B: Upper wall, Side wall 20C,
21: Step part,
O: central axis, θ: rising angle

Claims (3)

口部と肩部と胴部と底部を有した合成樹脂製のボトルであって、
前記肩部の周方向には、前記口部に向けて山形に湾曲した湾曲部分を前記ボトルの中心軸方向に複数有すると共に一つの前記湾曲部分と他の前記湾曲部分の間に前記胴部に向いた角部を有する稜線が設けられ、
前記稜線によって、前記肩部の周囲に段差部又は溝部が形成されており、
前記ボトルは、前記中心軸に垂直な横断面の外形が円形状であることを特徴とするボトル。
A synthetic resin bottle with a mouth, shoulders, body and bottom.
In the circumferential direction of the shoulder portion, a plurality of curved portions curved in a chevron shape toward the mouth portion are provided in the central axis direction of the bottle, and the trunk portion is located between one curved portion and the other curved portion. A ridgeline with facing corners is provided,
A stepped portion or a groove portion is formed around the shoulder portion by the ridgeline.
The bottle is characterized in that the outer shape of the cross section perpendicular to the central axis is circular.
記底部は、減圧吸収機能を有する可動底壁部を有することを特徴とする請求項1記載のボトル。 Prior Symbol bottom, the bottle according to claim 1, characterized in that it has a movable bottom wall portion having a reduced pressure-absorbing function. 前記湾曲部分は、前記中心軸周りに周期的に形成されており、
複数の前記稜線は、同じ周期の前記湾曲部分を有することを特徴とする請求項1又は2記載のボトル。
The curved portion is periodically formed around the central axis.
The bottle according to claim 1 or 2, wherein the plurality of ridgelines have the curved portion having the same period.
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* Cited by examiner, † Cited by third party
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JPS5966709U (en) * 1982-10-28 1984-05-04 株式会社吉野工業所 bottle body
US6889858B2 (en) * 2000-11-03 2005-05-10 Portola Packaging, Inc. Multiple label container
JP2008079643A (en) * 2006-09-25 2008-04-10 Nipro Corp Plastic blow-molded infusion vessel
JP4978909B2 (en) * 2007-01-31 2012-07-18 株式会社吉野工業所 Plastic container
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JP5172427B2 (en) * 2008-03-31 2013-03-27 株式会社吉野工業所 Pressure-resistant bottle
JP5645603B2 (en) * 2010-10-27 2014-12-24 株式会社吉野工業所 Bottle
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