JP7114276B2 - plastic bottle - Google Patents

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Publication number
JP7114276B2
JP7114276B2 JP2018038928A JP2018038928A JP7114276B2 JP 7114276 B2 JP7114276 B2 JP 7114276B2 JP 2018038928 A JP2018038928 A JP 2018038928A JP 2018038928 A JP2018038928 A JP 2018038928A JP 7114276 B2 JP7114276 B2 JP 7114276B2
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Prior art keywords
plastic bottle
recesses
row
convex
concave
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JP2019151388A (en
Inventor
剛 吉良
俊也 小林
直斗 松竹
バゲット アリーシャ
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Suntory Holdings Ltd
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Suntory Holdings Ltd
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Priority to JP2018038928A priority Critical patent/JP7114276B2/en
Priority to ES19764901T priority patent/ES2960028T3/en
Priority to PCT/JP2019/001887 priority patent/WO2019171798A1/en
Priority to EP19764901.5A priority patent/EP3763629B1/en
Priority to CN201980011585.8A priority patent/CN111886182A/en
Publication of JP2019151388A publication Critical patent/JP2019151388A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
    • B65D1/0261—Bottom construction
    • B65D1/0276—Bottom construction having a continuous contact surface, e.g. Champagne-type bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/40—Details of walls
    • B65D1/42—Reinforcing or strengthening parts or members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D79/00—Kinds or details of packages, not otherwise provided for
    • B65D79/005—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting
    • B65D79/008—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a rigid or semi-rigid container, e.g. in bottles or jars
    • B65D79/0081—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a rigid or semi-rigid container, e.g. in bottles or jars in the bottom part thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2501/00—Containers having bodies formed in one piece
    • B65D2501/0009—Bottles or similar containers with necks or like restricted apertures designed for pouring contents
    • B65D2501/0018—Ribs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2501/00—Containers having bodies formed in one piece
    • B65D2501/0009—Bottles or similar containers with necks or like restricted apertures designed for pouring contents
    • B65D2501/0018—Ribs
    • B65D2501/0036—Hollow circonferential ribs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D79/00—Kinds or details of packages, not otherwise provided for
    • B65D79/005—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting
    • B65D79/008—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a rigid or semi-rigid container, e.g. in bottles or jars
    • B65D79/0084—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a rigid or semi-rigid container, e.g. in bottles or jars in the sidewall or shoulder part thereof

Description

本発明は、複数の凹部が列状に配置された凹部列を少なくとも二つ有する底部を備えるプラスチックボトルに関する。 The present invention relates to a plastic bottle with a bottom having at least two rows of recesses arranged in rows.

プラスチックボトルに充填された飲料の製造および流通の過程において、プラスチックボトル内部の圧力の変化に起因して、プラスチックボトルが変形する不具合が生じる場合がある。このような変形の原因となる圧力変化の例としては、温度変化による膨張および収縮に起因して内圧が変化することや、飲料を充填する際に大気圧より高い液圧が印可されること、などが挙げられる。これらの圧力の変化に起因する変形を未然に防ぐために、プラスチックボトルの底部の強度を向上するための種々の工夫が行われている。 2. Description of the Related Art During the process of manufacturing and distributing beverages filled in plastic bottles, there are cases where the plastic bottles are deformed due to changes in the internal pressure of the plastic bottles. Examples of pressure changes that cause such deformation include changes in internal pressure due to expansion and contraction due to temperature changes, application of liquid pressure higher than atmospheric pressure when filling the beverage, etc. Various measures have been taken to improve the strength of the bottom of the plastic bottle in order to prevent deformation caused by these changes in pressure.

かかる工夫の例として、特許文献１には、プラスチックボトルの底面からプラスチックボトルの内側方向に凹入する凹入部を設け、かかる凹入部からさらにプラスチックボトルの内側方向に凹入する略球状のリブを複数放射状に配置するプラスチックボトルが開示されている。当該プラスチックボトルは、略球状のリブを備えることで、熱収縮や内容物の自重に起因する底部の変形に対する耐力を獲得している。 As an example of such a device, in Patent Document 1, a recessed portion recessed from the bottom surface of the plastic bottle toward the inside of the plastic bottle is provided, and a substantially spherical rib recessed further toward the inside of the plastic bottle from the recessed portion is provided. Multiple radially arranged plastic bottles are disclosed. The plastic bottle is equipped with a substantially spherical rib to obtain resistance against deformation of the bottom due to heat shrinkage and the weight of the contents.

また、特許文献２には、底部に、複数のリブを有する可動壁部を設けたプラスチックボトルが開示されている。当該プラスチックボトルは、可動壁部がプラスチックボトルの内圧変化に速やかに対応して変形することで、プラスチックボトルの他の部分の変形を防ぐ効果を実現している。当該プラスチックボトルにおいては、可動壁部が複数のリブを有することによって、可動壁部の圧力変化吸収性能を高めることに成功している。 Further, Patent Document 2 discloses a plastic bottle having a movable wall portion having a plurality of ribs on the bottom portion. The plastic bottle achieves the effect of preventing deformation of other parts of the plastic bottle by deforming the movable wall part quickly in response to changes in the internal pressure of the plastic bottle. In the plastic bottle, the movable wall portion has a plurality of ribs, thereby successfully enhancing the pressure change absorbing performance of the movable wall portion.

特開平７－１１２７２９号公報JP-A-7-112729 国際公開第２０１２／４３３６２号WO2012/43362

ところで、特許文献１、２のような技術では、温度変化や自重などの自然に生じる圧力変化による変形に対する耐力は十分に獲得するに至っているが、より大きな圧力変化、たとえば、飲料を充填する際に機械的に印加される液圧に起因する圧力変化、に対しては耐力が不足し、その底部が内圧によって下方向に押し出される態様でボトルが変形する場合があった。そのため、充填工程において飲料に印加する液圧を、プラスチックボトルが変形しない範囲に制限する必要が生じ、そのような制限は飲料製品の生産性を損なうおそれがあった。 By the way, in the techniques such as Patent Documents 1 and 2, although sufficient resistance to deformation due to pressure changes that occur naturally such as temperature changes and self-weight is obtained, larger pressure changes, for example, when filling a beverage In some cases, the bottle was deformed in such a manner that the bottom part was pushed downward by the internal pressure due to the lack of resistance against the pressure change caused by the hydraulic pressure mechanically applied to the bottle. Therefore, it becomes necessary to limit the hydraulic pressure applied to the beverage in the filling process to a range in which the plastic bottle is not deformed, and such a limitation may impair productivity of the beverage product.

そこで、内部の圧力変化による変形に対する耐力を高めたプラスチックボトルの実現が望まれる。 Therefore, it is desired to realize a plastic bottle with increased resistance to deformation due to internal pressure changes.

本発明に係るプラスチックボトルは、底部に凹部を備えるプラスチックボトルであって、前記凹部は、前記底部から前記プラスチックボトルの内側に向けて突入し、前記凹部の平面形状は、内角が鋭角である四つの凸頂点と、内角が１８０°を超え３６０°未満である二つの凹頂点と、を有する凹六角形であって、前記凸頂点に隣接する二つの頂点は一つの前記凸頂点および一つの前記凹頂点であり、かつ、前記凹頂点に隣接する二つの頂点は二つの前記凸頂点であり、前記底部において、複数の前記凹部が、列状に配置された凹部列として設けられており、前記凹部列において、複数の前記凹部は、前記凹六角形の二つの前記凸頂点に挟まれる二つの辺の中心点どうしを結ぶ中心線の延長である中心軸に沿って、前記中心軸を一致させるように、互いに隣接して配置され、少なくとも二つの前記凹部列が、前記中心軸が互いに平行に並ぶように設けられていることを特徴とする。 A plastic bottle according to the present invention is a plastic bottle having a recess in the bottom, the recess protrudes from the bottom toward the inside of the plastic bottle, and the planar shape of the recess is a quadrilateral with an acute interior angle. A concave hexagon having two convex vertices and two concave vertices with an internal angle of more than 180° and less than 360°, wherein the two vertices adjacent to the convex vertex are one of the convex vertices and one of the Two vertices which are concave vertices and which are adjacent to the concave apex are two convex vertices, and a plurality of the concave portions are provided as a row of concave portions arranged in a row on the bottom portion, In the row of recesses, the plurality of recesses coincide with each other along a center axis that is an extension of a center line connecting the center points of two sides sandwiched between the two convex vertices of the recessed hexagon. At least two rows of recesses are arranged so that the central axes are parallel to each other .

この構成によれば、凹部が、中心軸に沿う方向の荷重にも、中心軸と直交する方向の荷重にも、追随して変形することができるため、良好な圧力変化吸収性能を実現することができる。また、複数の凹部どうしが協同的に作用することで、圧力変化吸収性能が高まる。加えて、複数の凹部列に属する複数の凹部どうしが協同的に作用することで、さらに圧力変化吸収性能が高まる。 According to this configuration, the recess can be deformed to follow both the load along the central axis and the load perpendicular to the central axis, so that good pressure change absorption performance can be achieved. can be done. In addition, the cooperative action of the plurality of concave portions enhances the pressure change absorption performance. In addition, the cooperative action of a plurality of recesses belonging to a plurality of rows of recesses further enhances the pressure change absorption performance.

以下、本発明の好適な態様について説明する。ただし、以下に記載する好適な態様例によって、本発明の範囲が限定されるわけではない。 Preferred embodiments of the present invention are described below. However, the scope of the present invention is not limited by the preferred embodiments described below.

本発明に係るプラスチックボトルは、一態様として、前記四つの凸頂点の内角は全て等しく、かつ、前記二つの凹頂点の内角は互いに等しいことが好ましい。 As one aspect of the plastic bottle according to the present invention, it is preferable that the interior angles of the four convex apexes are all equal, and the interior angles of the two concave apexes are equal to each other.

この構成によれば、凹部が対称性の高い平面形状を有することで、荷重に追随して変形する際に対称性良く変形することができ、圧力変化吸収性能が高まる。 According to this configuration, since the concave portion has a highly symmetrical planar shape, the concave portion can be deformed with good symmetry when deformed according to the load, and the pressure change absorbing performance is enhanced.

本発明に係るプラスチックボトルは、一態様として、少なくとも二つの前記凹部列は、互いに隣接する第一凹部列と第二凹部列とを含み、前記第一凹部列と前記第二凹部列とは、前記中心軸に沿う方向に互いにオフセットされて配置されており、当該オフセットの幅は前記中心線の長さの４０～６０％に相当し、前記第一凹部列に属する隣接する二つの前記凹部の隣接する一つずつの前記凸頂点が、前記第二凹部列に属する前記凹部の前記凹頂点の平面視における外側に、平面視において嵌入するように配置されていることが好ましい。 As one aspect of the plastic bottle according to the present invention, at least two of the recessed rows include a first recessed row and a second recessed row adjacent to each other, and the first recessed row and the second recessed row are are arranged offset from each other in the direction along the central axis, the width of the offset corresponds to 40 to 60% of the length of the central line, and the width of the two adjacent concave portions belonging to the first row of concave portions. It is preferable that each of the adjacent convex apexes is arranged so as to fit in a plan view outside the concave apexes of the recesses belonging to the second recess row in a plan view.

この構成によれば、隣接する凹部どうしが互いに嵌入する構造を有することによって、凹部の底面に沿う方向の運動が規制される。その結果、底部の変形が妨げられるので、プラスチックボトルは変形を起こしうる荷重に対する耐力を獲得し、プラスチックボトル全体の変形を防ぐ効果が得られる。 According to this configuration, since adjacent recesses have a structure in which they are fitted into each other, movement in the direction along the bottom surface of the recess is restricted. As a result, the deformation of the bottom portion is prevented, so that the plastic bottle acquires the resistance to the load that may cause deformation, and the effect of preventing the deformation of the entire plastic bottle is obtained.

本発明に係るプラスチックボトルは、一態様として、前記凸頂点の内角は６０°を越え８０°以下であることが好ましい。 As one aspect of the plastic bottle according to the present invention, it is preferable that the internal angle of the convex apex is more than 60° and less than or equal to 80°.

凹部の平面形状が上記の範囲を満たす場合は、圧力変化吸収性能をより高めることができる。 When the planar shape of the concave portion satisfies the above range, the pressure change absorption performance can be further enhanced.

本発明に係るプラスチックボトルは、一態様として、前記凹部は、前記底部から前記プラスチックボトルの内側に向けて、０．５～２．５ｍｍ突入していることが好ましい。 As one aspect of the plastic bottle according to the present invention, it is preferable that the recess projects from the bottom toward the inside of the plastic bottle by 0.5 to 2.5 mm.

凹部の深さが上記の範囲を満たす場合は、圧力変化吸収性能をより高めることができる。 When the depth of the concave portion satisfies the above range, the pressure change absorption performance can be further enhanced.

本発明に係るプラスチックボトルは、一態様として、前記凹六角形の対角線のうち長さが最大の対角線の長さは３～８ｍｍであることが好ましい。 As one aspect of the plastic bottle according to the present invention, it is preferable that the longest diagonal of the diagonals of the concave hexagon has a length of 3 to 8 mm.

凹部の平面形状が上記の範囲を満たす場合は、圧力変化吸収性能をより高めることができる。 When the planar shape of the concave portion satisfies the above range, the pressure change absorption performance can be further enhanced.

本発明に係るプラスチックボトルは、一態様として、前記底部は、前記プラスチックボトルの接地部から前記プラスチックボトルの径方向内側に向かうにつれて前記プラスチックボトルの内側に突入するドーム部を有し、前記凹部は前記ドーム部からさらに前記プラスチックボトルの内側に突入するように設けられていることが好ましい。 In one aspect of the plastic bottle according to the present invention, the bottom portion has a dome portion that protrudes into the plastic bottle from the ground portion of the plastic bottle toward the inside in the radial direction of the plastic bottle, and the recess is It is preferable that the dome portion is further protruded into the inside of the plastic bottle.

この構成によれば、ドーム部による耐圧力と、凹部による圧力変化吸収性能とを併せて利用できるので、プラスチックボトルの圧力に対する耐力をより高めることができる。 According to this configuration, the pressure resistance of the dome portion and the pressure change absorption performance of the concave portion can be used together, so that the pressure resistance of the plastic bottle can be further increased.

本発明のさらなる特徴と利点は、図面を参照して記述する以下の例示的かつ非限定的な実施形態の説明によってより明確になるであろう。 Further features and advantages of the invention will become clearer from the following description of exemplary and non-limiting embodiments described with reference to the drawings.

プラスチックボトルの正面図。Front view of a plastic bottle. プラスチックボトルの正面断面図。Front sectional view of a plastic bottle. 図１におけるＩＩＩ－ＩＩＩ断面図。III-III sectional view in FIG. 図１におけるＩＶ－ＩＶ断面図。IV-IV sectional view in FIG. プラスチックボトルの胴部の正面拡大図。The front enlarged view of the trunk|drum of a plastic bottle. 図５におけるＶＩ－ＶＩ断面図。VI-VI sectional view in FIG. 図５におけるＶＩＩ－ＶＩＩ断面図。VII-VII cross-sectional view in FIG. プラスチックボトルの底部の下面図。Bottom view of the bottom of the plastic bottle. プラスチックボトルの底部に設けられた凹部底部の拡大図。FIG. 4 is an enlarged view of the bottom of a recess provided in the bottom of the plastic bottle.

本発明に係るプラスチックボトルの実施形態について、図面を参照して説明する。本実施形態に係るプラスチックボトル１００は、図１に示すように、液体の注ぎ口としての口部１と、口部１と連続し底面方向に向かうにつれて徐々に拡径する肩部２と、肩部２と連続する円筒状の胴部３と、プラスチックボトル１００の底となる底部４と、から構成されている。なお、以下の説明において、プラスチックボトル１００の表面に設けられる各構造物の「深さ」を、プラスチックボトル１００の表面から内部へと突入する深さであるものと定義する。 An embodiment of a plastic bottle according to the present invention will be described with reference to the drawings. The plastic bottle 100 according to this embodiment, as shown in FIG. It is composed of a cylindrical body portion 3 that is continuous with the portion 2 and a bottom portion 4 that serves as the bottom of the plastic bottle 100 . In the following description, the “depth” of each structure provided on the surface of the plastic bottle 100 is defined as the depth of penetration from the surface of the plastic bottle 100 into the inside.

なお、本実施形態に係るプラスチックボトル１００は、たとえば、ポリエチレン、ポリプロピレン、ポリエチレンテレフタレートなどの熱可塑性樹脂を主材料として、二軸延伸ブロー成形などの延伸成形法によって一体的に成形することができる。プラスチックボトル１００の容量は特に限定されず、一般的に流通している２８０ｍＬ、３５０ｍＬ、５００ｍＬなど、２００ｍＬ～２Ｌ程度とすることができる。また、プラスチックボトル１００に充填させる液体は特に限定されず、たとえば、飲料水、茶、果汁、コーヒー、ココア、清涼飲料水、アルコール飲料、乳飲料、スープなどの飲料や、ソースや醤油などの液体調味料など、が挙げられる。 The plastic bottle 100 according to the present embodiment can be integrally molded using a thermoplastic resin such as polyethylene, polypropylene, or polyethylene terephthalate as a main material by a stretch molding method such as biaxial stretch blow molding. The capacity of the plastic bottle 100 is not particularly limited, and can be about 200 mL to 2 L, such as 280 mL, 350 mL, and 500 mL, which are generally distributed. Moreover, the liquid to be filled in the plastic bottle 100 is not particularly limited. seasonings, etc.

〔リブ構造〕
胴部３の上部領域３ａには、凹状の主周リブ３１が設けられている。また、胴部３の上部領域３ａおよび下部領域３ｃには、凹状の副周リブ３２が設けられている。図２に示すように、主周リブ３１は、副周リブ３２に比べて、深さおよび上下方向の幅が大きくなるように形成されている。 [Rib structure]
A concave main peripheral rib 31 is provided in the upper region 3 a of the body portion 3 . In addition, recessed sub-peripheral ribs 32 are provided in the upper region 3 a and the lower region 3 c of the body 3 . As shown in FIG. 2 , the main peripheral rib 31 is formed to have a greater depth and vertical width than the secondary peripheral rib 32 .

図３に示すように、主周リブ３１は、プラスチックボトル１００の周方向に沿って深さが連続的に変化する波状の水平断面形状を有し、その深さは、最大値が４．５ｍｍであり、最小値が３．５ｍｍである。主周リブ３１には、深さが最大値を取る点３１ａと、深さが最小値を取る点３１ｂと、が、それぞれ７箇所ずつあり、主周リブ３１の水平断面形状は、深さが最大値を取る点３１ａと深さが最小値を取る点３１ｂとを交互に滑らかに結んだ波状の形状である。すなわち、当該水平断面形状は、深さが最大値を取る点３１ａの周辺において前記プラスチックボトルの外側方向に凸であり、深さが最小値を取る点３１ｂの周辺において前記プラスチックボトルの内側方向に凸であり、深さが最大値を取る点３１ａと深さが最小値を取る点３１ｂとの間に変曲点を有する閉曲線である。 As shown in FIG. 3, the main circumferential rib 31 has a wavy horizontal cross-sectional shape whose depth continuously changes along the circumferential direction of the plastic bottle 100, and the maximum depth is 4.5 mm. and the minimum value is 3.5 mm. The main circumferential rib 31 has seven points 31a where the depth is maximum and seven points 31b where the depth is minimum. It is a wavy shape in which a point 31a having a maximum value and a point 31b having a minimum depth are alternately and smoothly connected. That is, the horizontal cross-sectional shape is convex in the outward direction of the plastic bottle around the point 31a where the depth is the maximum value, and is convex in the inside direction of the plastic bottle around the point 31b where the depth is the minimum value. It is a convex closed curve having an inflection point between a point 31a at which the depth is maximum and a point 31b at which the depth is minimum.

主周リブ３１の上下方向の幅は、深さが最大値を取る点３１ａにおいて８．０ｍｍであり、深さが最小値を取る点３１ｂにおいて７．２ｍｍである。 The width of the main peripheral rib 31 in the vertical direction is 8.0 mm at the point 31a where the depth is maximum and 7.2 mm at the point 31b where the depth is minimum.

図１、２に示すように、副周リブ３２は複数設けられてよく、本実施形態では副周リブ３２が、上部領域３ａに三つ、下部領域３ｃに二つ、それぞれ設けられている。また、本実施形態では、副周リブ３２は円状の水平断面形状を有し、深さが１．５ｍｍであり、上下方向の幅が４．９ｍｍである。 As shown in FIGS. 1 and 2, a plurality of sub-peripheral ribs 32 may be provided, and in this embodiment, three sub-peripheral ribs 32 are provided in the upper region 3a and two in the lower region 3c. In this embodiment, the sub-peripheral rib 32 has a circular horizontal cross-sectional shape, a depth of 1.5 mm, and a vertical width of 4.9 mm.

プラスチックボトル１００に水平方向の荷重が加わると、当該荷重はプラスチックボトル１００の水平断面形状が楕円形上に変形しうる。しかし、本実施形態に係るプラスチックボトル１００は、主周リブ３１が波状の水平断面形状を有することにより荷重が集中しにくい構造を実現しているので、プラスチックボトル１００の変形が起こりにくい。 When a horizontal load is applied to the plastic bottle 100, the load can deform the horizontal cross-sectional shape of the plastic bottle 100 into an elliptical shape. However, since the plastic bottle 100 according to the present embodiment has a wavy horizontal cross-sectional shape of the main circumferential rib 31, a structure in which the load is less likely to be concentrated is realized, so that the plastic bottle 100 is less likely to be deformed.

また、プラスチックボトル１００に上下方向の荷重が加わった場合も、プラスチックボトルが上下方向に変形しうる。しかし、本実施形態に係るプラスチックボトル１００は、深さおよび幅が異なる主周リブ３１と副周リブ３２とを備えることで、これらのリブが共同してバネ状に働き、上下方向の荷重を緩和する作用を発現するので、プラスチックボトル１００の変形が起こりにくい。 Also, when a vertical load is applied to the plastic bottle 100, the plastic bottle may be deformed in the vertical direction. However, the plastic bottle 100 according to the present embodiment includes the main peripheral rib 31 and the secondary peripheral rib 32 having different depths and widths. Since a mitigating action is exhibited, deformation of the plastic bottle 100 is less likely to occur.

〔パネル構造〕
胴部３の中部領域３ｂには、径方向に窪んだパネル３３が、中部領域３ｂの周方向に並んで複数（本実施形態では六つ）等間隔で形成されている。図５に示すように、パネル３３は、中部領域３ｂの上下方向に延びる形状であって、プラスチックボトル１００の中心軸を中心として周方向にねじれる形状で設けられている。また、パネル３３の周囲には胴部基準面３４が形成されている。 [Panel structure]
In the central region 3b of the body 3, a plurality of (six in this embodiment) panels 33 recessed in the radial direction are formed at equal intervals in the circumferential direction of the central region 3b. As shown in FIG. 5, the panel 33 has a shape extending vertically in the middle region 3b, and is provided in a shape twisted in the circumferential direction around the central axis of the plastic bottle 100. As shown in FIG. A trunk reference surface 34 is formed around the panel 33 .

図５～７に示すように、パネル３３は、パネル第一凹部３３ａ、パネル第二凹部３３ｂ、および、パネル凸部３３ｃ、を有する。パネル第一凹部３３ａは平面状の形状を有し、胴部基準面３４からプラスチックボトル１００の内側に向けて陥没するように設けられている。パネル第二凹部３３ｂは、パネル第一凹部３３ａの周方向の中央に、パネル第一凹部３３ａからさらにプラスチックボトル１００の内側に向けて陥没するように設けられている。 As shown in FIGS. 5-7, the panel 33 has a panel first recess 33a, a panel second recess 33b, and a panel protrusion 33c. The panel first concave portion 33a has a planar shape and is provided so as to be depressed toward the inside of the plastic bottle 100 from the body portion reference surface 34. As shown in FIG. The panel second recess 33b is provided in the center of the panel first recess 33a in the circumferential direction so as to sink further toward the inside of the plastic bottle 100 from the panel first recess 33a.

パネル凸部３３ｃは、パネル第一凹部３３ａの上下方向の両端部が、パネル第一凹部３３ａの周方向の全幅にわたって、パネル第一凹部３３ａからプラスチックボトル１００の外側に向かって凸となる湾曲面として形成されている。なお、パネル凸部３３ｃの上下方向の幅は、パネル凸部３３ｃの周方向の両端部において最も小さく、パネル凸部３３ｃの周方向の中央部において最も大きい。 The panel protrusion 33c is a curved surface in which both ends in the up-down direction of the panel first recess 33a protrude from the panel first recess 33a toward the outside of the plastic bottle 100 over the entire width of the panel first recess 33a in the circumferential direction. is formed as The width of the panel protrusion 33c in the vertical direction is the smallest at both ends in the circumferential direction of the panel protrusion 33c and the largest at the central portion in the circumferential direction of the panel protrusion 33c.

二つのパネル第一凹部３３ａから延長する二つの胴部基準面３４が会合する部分に、峰状部３４ａが形成される。胴部基準面３４の、プラスチックボトル１００の中心軸からの距離は、峰状部３４ａにおいて最大となる。 A ridge portion 34a is formed at a portion where two body portion reference surfaces 34 extending from the two panel first recess portions 33a meet. The distance of the body reference plane 34 from the central axis of the plastic bottle 100 is maximum at the ridge 34a.

従来のプラスチック製のボトルに設けられている減圧吸収部は、ボトルに飲料を充填するために加圧する際に径方向外側へ変形しやすい、ボトル成形時に収縮による凹み（いわゆるヒケ）を起こしやすい、などの強度上の課題を有していた。本実施形態に係るプラスチックボトル１００は、パネル凸部３３ｃを有することでパネル３３の補強を実現しており、上記のような変形による不具合が起こりにくい。 The vacuum absorption part provided in a conventional plastic bottle tends to deform radially outward when pressurized to fill the bottle with a beverage, and tends to cause dents (so-called sink marks) due to shrinkage during bottle molding. It had problems on strength such as. In the plastic bottle 100 according to the present embodiment, the panel 33 is reinforced by having the panel convex portion 33c, and the problem due to deformation as described above is less likely to occur.

〔底部構造〕
図５、８、９に示すように、底部４には、机などの設置面に対して接地する接地部４１と、接地部４１から径方向内側に向かうにつれてプラスチックボトル１００の内側（図５における上方）に突入するドーム部４２と、が形成されている。ドーム部４２の中央部には平坦な形状を有するドーム中央部４２１が設けられ、ドーム中央部４２１の外側から接地部４１の内側にわたって複数の底部凹部４２２（凹部の例）が設けられている。底部凹部４２２はドーム部４２からさらにプラスチックボトル１００の内側に突入する。 [Bottom structure]
As shown in FIGS. 5, 8, and 9, the bottom portion 4 includes a grounding portion 41 that is grounded on an installation surface such as a desk, and the inside of the plastic bottle 100 (in FIG. A dome portion 42 projecting upward) is formed. A dome central portion 421 having a flat shape is provided at the central portion of the dome portion 42 , and a plurality of bottom recesses 422 (examples of recesses) are provided from the outside of the dome central portion 421 to the inside of the grounding portion 41 . The bottom recess 422 protrudes further into the plastic bottle 100 from the dome portion 42 .

図９に示すように、底部凹部４２２は、平面視において、内角が７０°である四つの凸頂点４２２ａと、内角が２２０°である二つの凹頂点４２２ｂと、を有する凹六角形状（いわゆるボウタイ状）の形状を有する。ここで、凸頂点４２２ａに隣接する二つの頂点は凸頂点４２２ａおよび凹頂点４２２ｂであり、凹頂点４２２ｂに隣接する二つの頂点は二つの凸頂点４２２ａである。なお、当該凹六角形の各辺はいずれも３ｍｍであり、当該凹六角形の対角線のうち長さが最大の対角線の長さは６ｍｍである。また、底部凹部４２２の深さは１．２ｍｍである。 As shown in FIG. 9, the bottom recessed portion 422 has a recessed hexagonal shape (a so-called bowtie shape) having four convex apexes 422a with an internal angle of 70° and two concave apexes 422b with an internal angle of 220° in plan view. shape). Here, the two vertices adjacent to the convex vertex 422a are the convex vertex 422a and the concave vertex 422b, and the two vertices adjacent to the concave vertex 422b are the two convex vertices 422a. Each side of the concave hexagon has a length of 3 mm, and the longest diagonal of the diagonals of the concave hexagon has a length of 6 mm. Also, the depth of the bottom recess 422 is 1.2 mm.

図８、９に示すように、底部凹部４２２は、複数の底部凹部４２２が列状に配置された底部凹部列４２３（凹部列の例）を形成する。底部凹部列４２３において、複数の底部凹部４２２は、二つの凸頂点４２２ａに挟まれる二つの辺の中心点どうしを結ぶ中心線ＣＬの延長である中心軸ＣＡに沿って、中心軸ＣＡを一致させるように、互いに隣接して配置されている。 As shown in FIGS. 8 and 9, the bottom recessed portions 422 form a bottom recessed portion row 423 (an example of a recessed portion row) in which a plurality of bottom recessed portions 422 are arranged in a row. In the bottom recessed portion row 423, the plurality of bottom recessed portions 422 are arranged along the central axis CA which is an extension of the center line CL connecting the center points of the two sides sandwiched between the two convex vertices 422a. are placed adjacent to each other so as to match the

図８、９に示すように、複数の底部凹部列４２３は、それぞれの中心軸ＣＡが互いに平行に並ぶように配置されている。また、互いに隣接する二つの底部凹部列４２３ａ、４２３ｂ（第一凹部列および第二凹部列の例）は、中心軸ＣＡに沿って互いにオフセットされて配置されており、そのオフセットの幅は中心線ＣＬの長さ（５．２ｍｍ）の半分に相当する２．６ｍｍである。なお、ここで「オフセット」の用語は、一方の底部凹部列４２３ａに属する底部凹部４２２の２つの凹頂点４２２ｂどうしを結ぶ直線が隣接する他方の底部凹部列４２３ｂに属する底部凹部４２２の２つの凹頂点４２２ｂどうしを結ぶ直線と一致しないように、複数の底部凹部列４２３を配置することを表し、「オフセットの幅」の用語は、当該直線どうしの離間距離を表す。 As shown in FIGS. 8 and 9, the plurality of rows of bottom recessed portions 423 are arranged so that their central axes CA are parallel to each other. Also, the two bottom recessed rows 423a and 423b (examples of the first recessed row and the second recessed row) adjacent to each other are offset from each other along the central axis CA , and the width of the offset is the center It is 2.6 mm, which corresponds to half the length of the line CL (5.2 mm). Here, the term "offset" means that a straight line connecting two concave apexes 422b of the bottom recessed portions 422 belonging to one bottom recessed portion row 423a corresponds to two recesses of the bottom recessed portions 422 belonging to the other bottom recessed portion row 423b. The term "offset width" refers to the distance between the straight lines connecting the vertices 422b.

さらに、互いに隣接する三つの底部凹部４２２が、二つの凸頂点４２２ａと、一つの凹頂点４２２ｂと、を近接させる態様で配置されている。換言すれば、底部凹部列４２３ａに属する隣接する二つの底部凹部４２２の隣接する一つずつの凸頂点４２２ａが、底部凹部列４２３ｂに属する底部凹部４２２の凹頂点４２２ｂの平面視における外側に、平面視において嵌入するように配置されている（図９のＡ部）。かかる嵌入構造は、三つの底部凹部４２２が隣接する全ての場所に形成されている。 Furthermore, three bottom recesses 422 adjacent to each other are arranged in such a manner that two convex apexes 422a and one concave apex 422b are brought close to each other. In other words, each adjacent convex apex 422a of each of the two adjacent bottom recessed portions 422 belonging to the bottom recessed portion row 423a is positioned outside of the recessed apex 422b of the bottom recessed portion 422 belonging to the bottom recessed portion row 423b in plan view. It is arranged so as to fit in when viewed (part A in FIG. 9). Such an inset structure is formed wherever the three bottom recesses 422 are adjacent.

本実施形態に係るプラスチックボトル１００は、底部凹部４２２が上述のごとく互いに嵌入する構造を有することによって、底部凹部４２２の底面に沿う方向の運動が規制され、その結果、底部４の変形が妨げられる。これによってプラスチックボトル１００は変形を起こしうる荷重に対する耐力を獲得し、プラスチックボトル１００の全体が変形しにくくなる効果が得られる。 Since the plastic bottle 100 according to this embodiment has a structure in which the bottom recesses 422 are fitted into each other as described above, movement of the bottom recesses 422 along the bottom surface is regulated, and as a result, deformation of the bottom 4 is prevented. . As a result, the plastic bottle 100 acquires resistance to a load that can cause deformation, and the effect that the plastic bottle 100 as a whole is less likely to deform can be obtained.

〔その他の実施形態〕
最後に、本発明に係るプラスチックボトルのその他の実施形態について説明する。なお、以下のそれぞれの実施形態で開示される構成は、矛盾が生じない限り、他の実施形態で開示される構成と組み合わせて適用することも可能である。 [Other embodiments]
Finally, another embodiment of the plastic bottle according to the present invention will be described. It should be noted that the configurations disclosed in the respective embodiments below can also be applied in combination with configurations disclosed in other embodiments unless there is a contradiction.

上記の実施形態では、主周リブ３１が一つ設けられている構成を例として説明した。しかし、そのような構成に限定されることなく、本発明に係るプラスチックボトルは複数の周リブを備えていてもよい。ただし、上下方向の荷重を緩和する作用を有効に発現する観点から、上記の実施形態のように、主周リブを一つ有することが好ましく、主周リブに加えて少なくとも一つの副周リブを有することが好ましく、主周リブに加えて少なくとも五つの副周リブを有することがさらに好ましい。 In the above embodiment, the configuration in which one main peripheral rib 31 is provided has been described as an example. However, without being limited to such a configuration, the plastic bottle according to the present invention may have a plurality of circumferential ribs. However, from the viewpoint of effectively exerting the effect of alleviating the load in the vertical direction, it is preferable to have one main peripheral rib as in the above embodiment, and at least one secondary peripheral rib is provided in addition to the main peripheral rib. It is preferred to have at least five secondary peripheral ribs in addition to the main peripheral rib.

上記の実施形態では、主周リブ３１が、深さが最大値を取る点３１ａと、深さが最小値を取る点３１ｂと、を、それぞれ７箇所ずつ有する構成を例として説明した。しかし、そのような構成に限定されることなく、主周リブの深さが最大値を取る点と最小値を取る点とは、同数かつ複数であれば任意の数であってよい。ただし、水平方向の荷重の集中を避ける作用を良好に発言できることから、主周リブの深さが最大値を取る点と最小値を取る点とを、それぞれ６～９箇所ずつ有することが好ましい。 In the above embodiment, the main peripheral rib 31 has seven points 31a where the depth is maximum and seven points 31b where the depth is minimum. However, without being limited to such a configuration, the number of points at which the depth of the main circumferential rib has the maximum value and the point at which the depth of the main circumferential rib has the minimum value may be any number as long as they are the same number and plural. However, since the effect of avoiding the concentration of the load in the horizontal direction can be effectively expressed, it is preferable to have 6 to 9 points where the depth of the main circumferential rib takes the maximum value and the point where the depth takes the minimum value, respectively.

上記の実施形態では、主周リブ３１の深さの最大値が４．５ｍｍであり、最小値が３．５ｍｍである構成を例として説明した。しかし、そのような構成に限定されることなく、周リブの深さの最大値は４．０～５．５ｍｍであってよく、最小値は最大値より０．５～１．５ｍｍ小さくてよい。なお、周リブの深さの最大値は４．１～５．２ｍｍであることが好ましく、４．２～５．０ｍｍであることがさらに好ましい。また、周リブの深さの最小値は最大値より０．６～１．４ｍｍ小さいことが好ましく、０．７～１．３ｍｍ小さいことがさらに好ましい。 In the above-described embodiment, the maximum depth of the main circumferential rib 31 is 4.5 mm and the minimum depth is 3.5 mm. However, without being limited to such a configuration, the maximum depth of the circumferential rib may be 4.0-5.5 mm, and the minimum may be 0.5-1.5 mm less than the maximum. . The maximum depth of the circumferential rib is preferably 4.1 to 5.2 mm, more preferably 4.2 to 5.0 mm. The minimum depth of the circumferential rib is preferably 0.6 to 1.4 mm smaller than the maximum depth, more preferably 0.7 to 1.3 mm smaller.

上記の実施形態では、主周リブ３１の上下方向の幅が、深さが最大値を取る点３１ａにおいて８．０ｍｍであり、深さが最小値を取る点３１ｂにおいて７．２ｍｍである構成を例として説明した。しかし、そのような構成に限定されることなく、周リブの上下方向の幅は、６～９ｍｍであってよい。なお、周リブの上下方向の幅は、６．２～８．８ｍｍであることが好ましく、６．５～８．５ｍｍであることがさらに好ましい。 In the above embodiment, the vertical width of the main circumferential rib 31 is 8.0 mm at the point 31a where the depth is maximum and 7.2 mm at the point 31b where the depth is minimum. explained as an example. However, without being limited to such a configuration, the vertical width of the circumferential rib may be 6 to 9 mm. The vertical width of the circumferential rib is preferably 6.2 to 8.8 mm, more preferably 6.5 to 8.5 mm.

上記の実施形態では、二つのパネル第一凹部３３ａから延長する二つの胴部基準面３４が会合する部分に、峰状部３４ａが形成される構成を例として説明した。しかし、そのような構成に限定されることなく、たとえば、二つの胴部基準面が会合する領域に平面状の接続部を設けてもよい。 In the above-described embodiment, the configuration in which the ridge portion 34a is formed at the portion where the two body portion reference surfaces 34 extending from the two panel first recess portions 33a meet has been described as an example. However, without being limited to such a configuration, for example, a planar connecting portion may be provided in the area where the two trunk reference surfaces meet.

上記の実施形態では、パネル第一凹部３３ａが平面状の形状を有する構成を例として説明した。しかし、そのような構成に限定されることなく、たとえば、パネル第一凹部は減圧吸収のためのリブを有していてもよい。 In the above embodiment, the configuration in which the panel first concave portion 33a has a planar shape has been described as an example. However, without being limited to such a configuration, for example, the panel first recess may have ribs for absorbing reduced pressure.

上記の実施形態では、凸頂点４２２ａの内角が７０°であり、凹頂点４２２ｂの内角が２２０°である構成を例として説明した。しかし、そのような構成に限定されることなく、凸頂点の内角は６０°を越え８０°以下であってよい。なお、凸頂点の内角は６３°以上８７°以下であることが好ましく、６５°以上７５°以下であることがさらに好ましい。 In the above-described embodiment, the configuration in which the interior angle of the convex apex 422a is 70 degrees and the interior angle of the concave apex 422b is 220 degrees has been described as an example. However, without being limited to such a configuration, the interior angle of the convex apex may be more than 60° and less than or equal to 80°. The internal angle of the convex apex is preferably 63° or more and 87° or less, more preferably 65° or more and 75° or less.

上記の実施形態では、凹六角形の対角線のうち長さが最大の対角線の長さが６ｍｍである構成を例として説明した。しかし、そのような構成に限定されることなく、当該対角線の長さは３～８ｍｍであってよい。なお、当該対角線の長さは４～７ｍｍであることが好ましく、５～７ｍｍであることがさらに好ましい。 In the above-described embodiment, the configuration in which the longest diagonal of the diagonals of the concave hexagon has a length of 6 mm has been described as an example. However, without being limited to such a configuration, the diagonal may have a length of 3 to 8 mm. The length of the diagonal line is preferably 4 to 7 mm, more preferably 5 to 7 mm.

上記の実施形態では、底部凹部４２２の深さが１．２ｍｍである構成を例として説明した。しかし、そのような構成に限定されることなく、底部凹部の深さは０．６～２．４ｍｍであってよい。なお、底部凹部の深さは０．５～２．５ｍｍであることが好ましく、０．７～２．３ｍｍであることがより好ましい。 In the above embodiment, the configuration in which the depth of the bottom recessed portion 422 is 1.2 mm has been described as an example. However, without being limited to such a configuration, the depth of the bottom recess may be 0.6 to 2.4 mm. The depth of the bottom recess is preferably 0.5 to 2.5 mm, more preferably 0.7 to 2.3 mm.

上記の実施形態では、互いに隣接する二つの底部凹部列４２３ａ、４２３ｂのオフセット幅が２．６ｍｍであり、中心線ＣＬの長さ（５．２ｍｍ）の半分である構成を例として説明した。しかし、そのような構成に限定されることなく、オフセットの幅は中心線の長さの４０～６０％であってよい。なお、オフセットの幅は中心線の長さの４５～５５％であることが好ましく、４８～５２％であることがより好ましく、５０％であることが特に好ましい。 In the above embodiment, the offset width of the two bottom recessed rows 423a and 423b adjacent to each other is 2.6 mm, which is half the length (5.2 mm) of the center line CL. However, without being limited to such a configuration, the width of the offset may be 40-60% of the length of the centerline. The offset width is preferably 45 to 55%, more preferably 48 to 52%, and particularly preferably 50% of the length of the center line.

その他の構成に関しても、本明細書において開示された実施形態は全ての点で例示であって、本発明の範囲はそれらによって限定されることはないと理解されるべきである。当業者であれば、本発明の趣旨を逸脱しない範囲で、適宜改変が可能であることを容易に理解できるであろう。したがって、本発明の趣旨を逸脱しない範囲で改変された別の実施形態も、当然、本発明の範囲に含まれる。 Regarding other configurations, it should be understood that the embodiments disclosed in this specification are examples in all respects, and that the scope of the present invention is not limited by them. Those skilled in the art will easily understand that modifications can be made as appropriate without departing from the scope of the present invention. Therefore, other embodiments modified without departing from the gist of the present invention are naturally included in the scope of the present invention.

本発明は、たとえば清涼飲料水の容器に利用することができる。 INDUSTRIAL APPLICABILITY The present invention can be used, for example, for soft drink containers.

１００ ：プラスチックボトル
１ ：口部
２ ：肩部
３ ：胴部
３ａ ：胴部の上部領域
３ｂ ：胴部の中部領域
３ｃ ：胴部の下部領域
３１ ：主周リブ
３２ ：副周リブ
３３ ：パネル
３３ａ ：パネル第一凹部
３３ｂ ：パネル第二凹部
３３ｃ ：パネル凸部
３４ ：胴部基準面
３４ａ ：峰状部
４ ：底部
４１ ：接地部
４２ ：ドーム部
４２１ ：ドーム中央部
４２２ ：底部凹部
４２２ａ ：底部凹部の凸頂点
４２２ｂ ：底部凹部の凹頂点
４２３（４２３ａ、４２３ｂ） ：底部凹部列
ＣＡ ：中心軸
ＣＬ ：中心線
Ａ ：底部凹部の相互嵌入部
100: Plastic bottle 1: Mouth 2: Shoulder 3: Body 3a: Upper region of body 3b: Middle region of body 3c: Lower region of body 31: Main peripheral rib 32: Sub-peripheral rib 33: Panel 33a: Panel first concave portion 33b: Panel second concave portion 33c: Panel convex portion 34: Body portion reference surface 34a: Peak portion 4: Bottom portion 41: Ground portion 42: Dome portion 421: Dome central portion 422: Bottom concave portion 422a: Convex apex of bottom recess 422b: Concave apex of bottom recess 423 (423a, 423b): Row of bottom recesses CA: Central axis CL: Center line A : Interfitting portion of bottom recesses

Claims (7)

底部に凹部を備えるプラスチックボトルであって、
前記凹部は、前記底部から前記プラスチックボトルの内側に向けて突入し、
前記凹部の平面形状は、内角が鋭角である四つの凸頂点と、内角が１８０°を超え３６０°未満である二つの凹頂点と、を有する凹六角形であって、
前記凸頂点に隣接する二つの頂点は一つの前記凸頂点および一つの前記凹頂点であり、かつ、前記凹頂点に隣接する二つの頂点は二つの前記凸頂点であり、
前記底部において、複数の前記凹部が、列状に配置された凹部列として設けられており、
前記凹部列において、複数の前記凹部は、前記凹六角形の二つの前記凸頂点に挟まれる二つの辺の中心点どうしを結ぶ中心線の延長である中心軸に沿って、前記中心軸を一致させるように、互いに隣接して配置され、
少なくとも二つの前記凹部列が、前記中心軸が互いに平行に並ぶように設けられているプラスチックボトル。 A plastic bottle with a recess in the bottom,
The recess projects from the bottom toward the inside of the plastic bottle,
The planar shape of the recess is a concave hexagon having four convex vertices with acute interior angles and two concave vertices with interior angles of more than 180° and less than 360°,
Two vertices adjacent to the convex vertex are one convex vertex and one concave vertex, and two vertices adjacent to the concave vertex are two convex vertices ;
In the bottom portion, a plurality of the recesses are provided as a row of recesses arranged in a row,
In the row of recesses, the plurality of recesses coincide with each other along a center axis that is an extension of a center line connecting the center points of two sides sandwiched between the two convex vertices of the recessed hexagon. are placed adjacent to each other so as to
A plastic bottle , wherein at least two rows of recesses are arranged such that the central axes thereof are parallel to each other . 前記四つの凸頂点の内角は全て等しく、かつ、前記二つの凹頂点の内角は互いに等しい請求項１に記載のプラスチックボトル。 2. The plastic bottle according to claim 1, wherein the interior angles of the four convex vertices are all equal, and the interior angles of the two concave vertices are equal to each other. 少なくとも二つの前記凹部列は、互いに隣接する第一凹部列と第二凹部列とを含み、
前記第一凹部列と前記第二凹部列とは、前記中心軸に沿う方向に互いにオフセットされて配置されており、当該オフセットの幅は前記中心線の長さの４０～６０％に相当し、
前記第一凹部列に属する隣接する二つの前記凹部の隣接する一つずつの前記凸頂点が、前記第二凹部列に属する前記凹部の前記凹頂点の平面視における外側に、平面視において嵌入するように配置されている請求項１または２に記載のプラスチックボトル。 the at least two rows of recesses include a first row of recesses and a second row of recesses adjacent to each other;
The first row of recesses and the second row of recesses are offset from each other in the direction along the central axis, and the width of the offset corresponds to 40 to 60% of the length of the center line,
Each of the adjacent convex apexes of the two adjacent recesses belonging to the first row of recesses fits, in plan view, outside the recesses of the recesses belonging to the second row of recesses in plan view. 3. A plastic bottle according to claim 1 or 2 , which is arranged such that: 前記凸頂点の内角は６０°を越え８０°以下である請求項１～３のいずれか１項に記載のプラスチックボトル。 4. The plastic bottle according to any one of claims 1 to 3 , wherein the internal angle of the convex apex is more than 60° and less than or equal to 80°. 前記凹部は、前記底部から前記プラスチックボトルの内側に向けて、０．５～２．５ｍｍ突入している請求項１～４のいずれか１項に記載のプラスチックボトル。 The plastic bottle according to any one of claims 1 to 4 , wherein the recess protrudes from the bottom portion toward the inside of the plastic bottle by 0.5 to 2.5 mm. 前記凹六角形の対角線のうち長さが最大の対角線の長さは３～８ｍｍである請求項１～５のいずれか１項の記載のプラスチックボトル。 The plastic bottle according to any one of claims 1 to 5 , wherein the longest diagonal line of the concave hexagon has a length of 3 to 8 mm. 前記底部は、前記プラスチックボトルの接地部から前記プラスチックボトルの径方向内側に向かうにつれて前記プラスチックボトルの内側に突入するドーム部を有し、前記凹部は前記ドーム部からさらに前記プラスチックボトルの内側に突入するように設けられている請求項１～６のいずれか１項に記載のプラスチックボトル。 The bottom portion has a dome portion that protrudes into the plastic bottle from the ground portion of the plastic bottle toward the radially inner side of the plastic bottle, and the recess protrudes further into the plastic bottle from the dome portion. The plastic bottle according to any one of claims 1 to 6 , which is provided so as to
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JP2013500909A (en) 2009-07-31 2013-01-10 アムコー リミテッド High temperature filling container

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JPH0312648Y2 (en) * 1985-02-25 1991-03-25
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JP2013500909A (en) 2009-07-31 2013-01-10 アムコー リミテッド High temperature filling container
WO2012043362A1 (en) 2010-09-30 2012-04-05 株式会社吉野工業所 Bottle

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