JP7068909B2 - Bottle - Google Patents

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JP7068909B2
JP7068909B2 JP2018082613A JP2018082613A JP7068909B2 JP 7068909 B2 JP7068909 B2 JP 7068909B2 JP 2018082613 A JP2018082613 A JP 2018082613A JP 2018082613 A JP2018082613 A JP 2018082613A JP 7068909 B2 JP7068909 B2 JP 7068909B2
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annular groove
auxiliary annular
wall surface
groove
auxiliary
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JP2019189268A (en
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孝典 鈴木
孝浩 春名
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Yoshino Kogyosho Co Ltd
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Yoshino Kogyosho Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Description

本発明は、ボトルに関する。 The present invention relates to a bottle.

従来から、合成樹脂材料で有底筒状に形成されたボトルとして、例えば下記特許文献１に示されるように、胴部に、全周にわたって連続して延びる環状溝を形成することにより、横荷重に対する胴部の剛性を向上させた構成が知られている。 Conventionally, as a bottle formed of a synthetic resin material into a bottomed tubular shape, for example, as shown in Patent Document 1 below, a lateral load is formed by forming an annular groove continuously extending over the entire circumference in the body portion. It is known that the body has an improved rigidity with respect to the body.

特開２０１７－１０９７８５号公報JP-A-2017-109785

しかしながら、前記従来のボトルでは、上下方向に大きな圧縮荷重が加えられたときに、胴部が、径方向のうちの一方向に拡大し、かつ前記一方向に直交する他方向に縮小するように復元不能に変形する、つまり座屈変形するおそれがある。この問題は軽量化すると顕在化する。 However, in the conventional bottle, when a large compressive load is applied in the vertical direction, the body portion expands in one of the radial directions and contracts in the other direction orthogonal to the one direction. There is a risk of irreparable deformation, that is, buckling deformation. This problem becomes apparent when the weight is reduced.

そこで、本発明は、胴部の座屈強度を向上させることができるボトルを提供することを目的とする。 Therefore, an object of the present invention is to provide a bottle capable of improving the buckling strength of the body portion.

本発明は、上記課題を解決するために以下のような手段を採用した。すなわち、本発明のボトルは、合成樹脂材料で形成された有底筒状のボトルであって、胴部に、全周にわたって連続して延びる環状溝と、全周にわたって連続して延びるとともに、前記環状溝を上下方向に挟む両側に各別に配設された一対の補助環状溝と、が形成され、前記補助環状溝の深さは、前記環状溝の深さより浅く、前記胴部において、前記環状溝と一対の前記補助環状溝との間に位置する各部分は、径方向の外側に向けて突の曲面状に形成されるとともに、前記環状溝および前記補助環状溝に段差なく連なり、前記環状溝は、径方向の内側に向けて窪む凹曲面状に形成され、一対の前記補助環状溝はそれぞれ、上側に位置する上壁面、下側に位置する下壁面、および前記上壁面と前記下壁面とを連結する溝底面により画成され、一対の前記補助環状溝の各前記溝底面は、径方向の内側に向けて突の曲面状に形成され、一対の前記補助環状溝のうち、上側に位置する上補助環状溝の前記上壁面は、前記溝底面から上方に向かうに従い漸次、径方向の外側に向けて延びるとともに、径方向の外側に向けて突の曲面状に形成されており、前記胴部において、前記上補助環状溝に対して上方から連なる部分に段差なく連なり、一対の前記補助環状溝のうち、下側に位置する下補助環状溝の前記下壁面は、前記溝底面から下方に向かうに従い漸次、径方向の外側に向けて延びるとともに、径方向の外側に向けて突の曲面状に形成されており、前記胴部において、前記下補助環状溝に対して下方から連なる部分に段差なく連なり、上下方向に沿う縦断面視において、前記胴部のうち、前記環状溝と一対の前記補助環状溝との間に位置する各部分の曲率半径は、前記溝底面の曲率半径より大きく、かつ前記下補助環状溝の前記下壁面、前記上補助環状溝の前記上壁面、および前記環状溝の各曲率半径より小さいことを特徴とする。 The present invention employs the following means to solve the above problems. That is, the bottle of the present invention is a bottomed cylindrical bottle made of a synthetic resin material, and has an annular groove that extends continuously over the entire circumference and an annular groove that extends continuously over the entire circumference and described above. A pair of auxiliary annular grooves, which are separately arranged on both sides of the annular groove in the vertical direction, are formed, and the depth of the auxiliary annular groove is shallower than the depth of the annular groove. Each portion located between the annular groove and the pair of auxiliary annular grooves is formed in a curved shape of a protrusion toward the outside in the radial direction, and is continuously connected to the annular groove and the auxiliary annular groove without a step. The annular groove is formed in a concave curved shape that is recessed inward in the radial direction, and the pair of auxiliary annular grooves are an upper wall surface located on the upper side, a lower wall surface located on the lower side, and the upper wall surface and the said surface, respectively. It is defined by the bottom surface of the groove connecting to the lower wall surface, and each of the bottom surfaces of the groove of the pair of auxiliary annular grooves is formed in a curved shape of a protrusion toward the inside in the radial direction, and among the pair of auxiliary annular grooves. The upper wall surface of the upper auxiliary annular groove located on the upper side gradually extends outward in the radial direction as it goes upward from the bottom surface of the groove, and is formed in a curved shape of a protrusion toward the outer side in the radial direction. In the body portion, the lower wall surface of the lower auxiliary annular groove located on the lower side of the pair of the auxiliary annular grooves is formed on the bottom surface of the groove. It gradually extends outward in the radial direction from the downward direction, and is formed in a curved shape of a protrusion toward the outer side in the radial direction. The radius of curvature of each part of the body portion located between the annular groove and the pair of auxiliary annular grooves is the radius of curvature of the bottom surface of the groove in a vertical cross-sectional view along the vertical direction. It is characterized by being larger and smaller than the radius of curvature of the lower wall surface of the lower auxiliary annular groove, the upper wall surface of the upper auxiliary annular groove, and the annular groove .

本発明では、胴部に、環状溝を上下方向に挟む両側に各別に配設された一対の補助環状溝が形成されているので、横荷重に対する剛性を確実に向上させることができるとともに、上下方向に大きな圧縮荷重が加えられたときに、胴部が、径方向のうちの一方向に拡大し、かつ前記一方向に直交する他方向に縮小するように復元不能に変形しようとしたときに、胴部において、環状溝と補助環状溝との間に位置する部分がリブとして作用することとなり、胴部の座屈変形を抑えることができる。
しかも、補助環状溝の深さが、環状溝の深さより浅いので、上下方向に大きな圧縮荷重が加えられたときに、補助環状溝が上下方向につぶれるように、胴部が変形するのを抑制することが可能になり、胴部の座屈強度を確実に向上させることができる。
胴部において、環状溝と一対の補助環状溝との間に位置する各部分が、径方向の外側に向けて突の曲面状に形成されるとともに、環状溝および補助環状溝に段差なく連なっているので、上下方向に大きな圧縮荷重が加えられたときに、胴部が座屈変形するのを確実に抑制することができるとともに、横荷重に対する剛性を確実に向上させることができる。 In the present invention, since the body portion is formed with a pair of auxiliary annular grooves separately arranged on both sides of the annular groove in the vertical direction, the rigidity against a lateral load can be reliably improved and the upper and lower portions can be reliably improved. When a large compressive load is applied in a direction, the body is irreversibly deformed so as to expand in one of the radial directions and contract in the other direction orthogonal to the one direction. In the body portion, the portion located between the annular groove and the auxiliary annular groove acts as a rib, and the buckling deformation of the body portion can be suppressed.
Moreover, since the depth of the auxiliary annular groove is shallower than the depth of the annular groove, the body is suppressed from being deformed so that the auxiliary annular groove is crushed in the vertical direction when a large compressive load is applied in the vertical direction. It becomes possible to surely improve the buckling strength of the torso.
In the body portion, each portion located between the annular groove and the pair of auxiliary annular grooves is formed in a curved surface shape with a protrusion toward the outside in the radial direction, and is continuously connected to the annular groove and the auxiliary annular groove without a step. Therefore, when a large compressive load is applied in the vertical direction, the body portion can be reliably suppressed from buckling deformation, and the rigidity against a lateral load can be reliably improved.

ここで、前記補助環状溝の幅は、前記環状溝の幅より狭くてもよい。
この場合、補助環状溝の幅が、環状溝の幅より狭いので、上下方向に大きな圧縮荷重が加えられたときに、補助環状溝が上下方向につぶれるように、胴部が変形するのを確実に抑制することができる。 Here, the width of the auxiliary annular groove may be narrower than the width of the annular groove.
In this case, since the width of the auxiliary annular groove is narrower than the width of the annular groove, it is certain that the body is deformed so that the auxiliary annular groove is crushed in the vertical direction when a large compressive load is applied in the vertical direction. Can be suppressed.

この発明によれば、胴部の座屈強度を向上させることができる。 According to the present invention, the buckling strength of the body portion can be improved.

本発明に係る一実施形態として示したボトルの側面図である。It is a side view of the bottle shown as one Embodiment which concerns on this invention. 図１に示すボトルの底部の半縦断面図である。It is a semi-vertical sectional view of the bottom of the bottle shown in FIG. 1. 図２に示すＡ－Ａ線矢視断面図の一部である。It is a part of the cross-sectional view taken along the line AA shown in FIG.

以下、図面を参照し、本発明の一実施形態に係るボトルを説明する。
本実施形態に係るボトル１は、図１から図３に示されるように、口部１１、肩部１２、胴部１３および底部１４を備え、これら１１～１４が、それぞれの中心軸線を共通軸上に位置させた状態で、この順に連設された概略構成となっている。ボトル１の内容積は、例えば３００ｍｌ以上２０００ｍｌ以下の内容物が充填される大きさとなっている。図示の例では、ボトル１は、５００ｍｌの内容物が充填されるのに用いられる大きさとなっている。 Hereinafter, a bottle according to an embodiment 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 present embodiment includes a mouth portion 11, a shoulder portion 12, a body portion 13 and a bottom portion 14, and these 11 to 14 have their respective central axes as a common axis. With the position on the top, it has a schematic configuration in which they are connected in this order. The internal volume of the bottle 1 is, for example, a size that can be filled with contents of 300 ml or more and 2000 ml or less. In the illustrated example, the bottle 1 is sized to be used to fill 500 ml of the contents.

以下、前記共通軸をボトル軸Ｏといい、ボトル軸Ｏ方向に沿って口部１１側を上側、底部１４側を下側といい、ボトル軸Ｏに沿う方向を上下方向といい、また、上下方向から見てボトル軸Ｏに交差する方向を径方向といい、ボトル軸Ｏ回りに周回する方向を周方向という。
なお、ボトル１は、射出成形により有底筒状に形成されたプリフォームが、ブロー成形されて形成され、合成樹脂材料で一体に形成されている。口部１１には、図示しないキャップが装着される。口部１１、肩部１２、胴部１３および底部１４はそれぞれ、ボトル軸Ｏに直交する横断面視形状が円形状となっている。 Hereinafter, the common axis is referred to as a bottle axis O, the mouth 11 side is referred to as an upper side along the bottle axis O direction, the bottom 14 side is referred to as a lower side, and the direction along the bottle axis O is referred to as an up-down direction. The direction that intersects the bottle axis O when viewed from the direction is called the radial direction, and the direction that orbits around the bottle axis O is called the circumferential direction.
The bottle 1 is formed by blow-molding a preform formed into a bottomed cylinder by injection molding, and is integrally formed of a synthetic resin material. A cap (not shown) is attached to the mouth portion 11. The mouth portion 11, the shoulder portion 12, the body portion 13, and the bottom portion 14 each have a circular cross-sectional view shape orthogonal to the bottle axis O.

胴部１３には、上下方向に長い長方形状のパネル部１３ａが、周方向に間隔をあけて複数形成されている。胴部１３において、パネル部１３ａより下方に位置する下端部に、全周にわたって連続して延びる環状溝１５が形成されている。環状溝１５は、径方向の内側に向けて窪む凹曲面状に形成されている。なお、環状溝１５は、胴部１３のうち、下端部以外の部分に形成してもよい。胴部１３の下端部の外径は、例えば５５ｍｍ以上１１０ｍｍ以下となっている。図示の例では、胴部１３の下端部の外径は、約７１ｍｍとなっている。 A plurality of rectangular panel portions 13a long in the vertical direction are formed on the body portion 13 at intervals in the circumferential direction. In the body portion 13, an annular groove 15 extending continuously over the entire circumference is formed at the lower end portion located below the panel portion 13a. The annular groove 15 is formed in a concave curved surface shape that is recessed inward in the radial direction. The annular groove 15 may be formed in a portion of the body portion 13 other than the lower end portion. The outer diameter of the lower end portion of the body portion 13 is, for example, 55 mm or more and 110 mm or less. In the illustrated example, the outer diameter of the lower end portion of the body portion 13 is about 71 mm.

底部１４は、外周縁部に接地部１８が位置する底壁部１９と、接地部１８の外周縁から上方に向けて延びる筒状のヒール部１７と、を備える。ヒール部１７は、径方向の外側に向けて突の曲面状に形成されている。ヒール部１７の上端開口縁が、胴部１３の下端開口縁に接続されている。ヒール部１７の下端開口縁が、底壁部１９の外周縁、つまり接地部１８の外周縁に接続されている。底壁部１９において、接地部１８より径方向の内側に位置する部分は、上方に向けて窪んだ陥没部１６となっている。なお、底壁部１９は陥没部１６を有しなくてもよい。 The bottom portion 14 includes a bottom wall portion 19 in which the ground contact portion 18 is located on the outer peripheral edge portion, and a tubular heel portion 17 extending upward from the outer peripheral edge of the ground contact portion 18. The heel portion 17 is formed in a curved surface shape with a protrusion toward the outside in the radial direction. The upper end opening edge of the heel portion 17 is connected to the lower end opening edge of the body portion 13. The lower end opening edge of the heel portion 17 is connected to the outer peripheral edge of the bottom wall portion 19, that is, the outer peripheral edge of the ground contact portion 18. In the bottom wall portion 19, a portion located inward in the radial direction from the ground contact portion 18 is a recessed portion 16 that is recessed upward. The bottom wall portion 19 does not have to have the depressed portion 16.

ヒール部１７は、第１部分２１と、上下方向に沿う縦断面視における曲率半径が第１部分２１より小さい第２部分２２と、が周方向に交互に配設されて構成されている。図示の例では、第２部分２２は１２個配設されている。第２部分２２における上端と下端との間に位置する部分は、第１部分２１における上端と下端との間に位置する部分より径方向の外側に位置している。
なお、第２部分２２の個数は適宜変更してもよく、また、第２部分２２における上端と下端との間に位置する部分は、第１部分２１における上端と下端との間に位置する部分より径方向の内側に位置してもよい。 The heel portion 17 is configured such that a first portion 21 and a second portion 22 having a radius of curvature smaller than the first portion 21 in a vertical cross-sectional view along the vertical direction are alternately arranged in the circumferential direction. In the illustrated example, twelve second portions 22 are arranged. The portion located between the upper end and the lower end of the second portion 22 is located radially outside the portion located between the upper end and the lower end of the first portion 21.
The number of the second portion 22 may be appropriately changed, and the portion located between the upper end and the lower end in the second portion 22 is a portion located between the upper end and the lower end in the first portion 21. It may be located more radially inside.

第２部分２２の前記縦断面視における曲率半径は、第１部分２１の前記縦断面視における曲率半径の、例えば０．６５倍以上０．８８倍未満となっている。０．６５倍未満になると、例えば空気溜まりが生じやすくなるなど成形性が劣るおそれがあり、０．８８以上になると、第２部分２２が補強効果を発揮しにくくなる。図示の例では、例えば、第１部分２１の前記縦断面視における曲率半径は約４．５ｍｍとされ、第２部分２２の前記縦断面視における曲率半径は約３．５ｍｍとなっている。第１部分２１における周方向の幅が、第２部分２２における周方向の幅より広い。図示の例では、第１部分２１における周方向の幅は、約９．８ｍｍとなっている。 The radius of curvature of the second portion 22 in the vertical cross-sectional view is, for example, 0.65 times or more and less than 0.88 times the radius of curvature of the first portion 21 in the vertical cross-sectional view. If it is less than 0.65 times, the moldability may be inferior, for example, an air pool is likely to occur, and if it is 0.88 or more, the second portion 22 is less likely to exert the reinforcing effect. In the illustrated example, for example, the radius of curvature of the first portion 21 in the vertical cross-sectional view is about 4.5 mm, and the radius of curvature of the second portion 22 in the vertical cross-sectional view is about 3.5 mm. The circumferential width of the first portion 21 is wider than the circumferential width of the second portion 22. In the illustrated example, the width of the first portion 21 in the circumferential direction is about 9.8 mm.

ヒール部１７は、第１部分２１と第２部分２２とを接続する第３部分２３を備える。第３部分２３は、第２部分２２側から第１部分２１側に向かうに従い漸次、径方向の内側に向けて延びつつ、前記縦断面視における曲率半径が大きくなっている。第１部分２１の前記縦断面視における曲率半径は、全周にわたって同等になっている。第３部分２３は、第２部分２２および第１部分２１に段差なく連なっている。 The heel portion 17 includes a third portion 23 that connects the first portion 21 and the second portion 22. The third portion 23 gradually extends inward in the radial direction from the second portion 22 side toward the first portion 21 side, and the radius of curvature in the vertical cross-sectional view increases. The radius of curvature of the first portion 21 in the vertical cross-sectional view is the same over the entire circumference. The third portion 23 is continuous with the second portion 22 and the first portion 21 without a step.

容器軸Ｏに直交する横断面視において、第１部分２１および第２部分２２は、径方向の外側に向けて突の曲面状を呈し、第３部分２３のうち、第１部分２１に連なる部分は、径方向の内側に向けて窪む曲面状を呈し、第２部分２２に連なる部分は、径方向の外側に向けて突の曲面状を呈する。前記横断面視において、第１部分２１の曲率半径は、第３部分２３のうち、第１部分２１に連なる部分、および第２部分２２に連なる部分の各曲率半径より大きい。前記横断面視において、第３部分２３のうち、第１部分２１に連なる部分、および第２部分２２に連なる部分の各曲率半径は、互いに同等になっている。 In the cross-sectional view orthogonal to the container axis O, the first portion 21 and the second portion 22 have a curved surface shape that protrudes outward in the radial direction, and the portion of the third portion 23 that is continuous with the first portion 21. Shows a curved surface shape that is recessed toward the inside in the radial direction, and the portion connected to the second portion 22 exhibits a curved surface shape that protrudes toward the outside in the radial direction. In the cross-sectional view, the radius of curvature of the first portion 21 is larger than the radius of curvature of the portion of the third portion 23 connected to the first portion 21 and the portion connected to the second portion 22. In the cross-sectional view, the radii of curvature of the portion of the third portion 23 connected to the first portion 21 and the portion connected to the second portion 22 are equal to each other.

第２部分２２は、周方向で互いに隣り合う一対の第３部分２３全体を一つの曲面部分と見たときに、この曲面部分の周方向の中央部に位置する頂部となっている。つまり、第２部分２２は、上下方向に延びる線状部分となっている。第２部分２２を周方向に挟んで互いに隣り合う一対の第３部分２３の周方向の総幅は、第１部分２１における周方向の幅より狭い。図示の例では、一対の第３部分２３の周方向の総幅は、約８．８ｍｍとなっている。 The second portion 22 is a top portion located at the center of the curved surface portion in the circumferential direction when the entire pair of third portions 23 adjacent to each other in the circumferential direction is regarded as one curved surface portion. That is, the second portion 22 is a linear portion extending in the vertical direction. The total width in the circumferential direction of the pair of third portions 23 adjacent to each other with the second portion 22 sandwiched in the circumferential direction is narrower than the width in the circumferential direction in the first portion 21. In the illustrated example, the total width of the pair of third portions 23 in the circumferential direction is about 8.8 mm.

なお、第２部分２２は、前記線状部分に限らず、周方向に幅を有してもよい。この場合、第１部分２１における周方向の幅は、第２部分２２における周方向の幅の２倍以上としてもよい。第２部分２２における周方向の幅が、第１部分２１における周方向の幅の半分未満になると、第２部分２２が補強効果を発揮しにくくなる。
また、第２部分２２を周方向に挟んで互いに隣り合う一対の第３部分２３の周方向の総幅を、第１部分２１における周方向の幅の大きさ以上としてもよい。 The second portion 22 is not limited to the linear portion, and may have a width in the circumferential direction. In this case, the circumferential width of the first portion 21 may be at least twice the circumferential width of the second portion 22. When the circumferential width of the second portion 22 is less than half the circumferential width of the first portion 21, the second portion 22 is less likely to exert the reinforcing effect.
Further, the total width in the circumferential direction of the pair of third portions 23 adjacent to each other with the second portion 22 sandwiched in the circumferential direction may be equal to or larger than the width in the circumferential direction in the first portion 21.

そして、本実施形態では、胴部１３に、全周にわたって連続して延びるとともに、環状溝１５を上下方向に挟む両側に各別に配設された上補助環状溝２５および下補助環状溝２６が形成されている。
上補助環状溝２５および下補助環状溝２６の各深さは、互いに同等とされるとともに、環状溝１５の深さより浅い。上補助環状溝２５および下補助環状溝２６の各幅は、互いに同等とされるとともに、環状溝１５の幅より狭い。 Then, in the present embodiment, the upper auxiliary annular groove 25 and the lower auxiliary annular groove 26 are formed on the body portion 13 so as to be continuously extended over the entire circumference and separately arranged on both sides of the annular groove 15 in the vertical direction. Has been done.
The depths of the upper auxiliary annular groove 25 and the lower auxiliary annular groove 26 are equal to each other and shallower than the depth of the annular groove 15. The widths of the upper auxiliary annular groove 25 and the lower auxiliary annular groove 26 are equal to each other and narrower than the width of the annular groove 15.

上補助環状溝２５および下補助環状溝２６はそれぞれ、上側に位置する上壁面２５ａ、２６ａ、下側に位置する下壁面２５ｂ、２６ｂ、および上壁面２５ａ、２６ａと下壁面２５ｂ、２６ｂとを連結する溝底面２５ｃ、２６ｃにより画成されている。 The upper auxiliary annular groove 25 and the lower auxiliary annular groove 26 connect the upper wall surfaces 25a and 26a located on the upper side, the lower wall surfaces 25b and 26b located on the lower side, and the upper wall surfaces 25a and 26a and the lower wall surface 25b and 26b, respectively. It is defined by the groove bottom surfaces 25c and 26c.

上補助環状溝２５および下補助環状溝２６の各溝底面２５ｃ、２６ｃは、径方向の内側に向けて突の曲面状に形成されている。前記縦断面視において、各溝底面２５ｃ、２６ｃそれぞれの曲率半径は互いに同等になっている。図示の例では、前記縦断面視において、各溝底面２５ｃ、２６ｃそれぞれの曲率半径は、例えば約０．５ｍｍとなっている。なお、前記縦断面視において、各溝底面２５ｃ、２６ｃそれぞれの曲率半径を互いに異ならせてもよい。
上補助環状溝２５および下補助環状溝２６の各溝底面２５ｃ、２６ｃそれぞれの径方向の位置は互いに同等になっている。上補助環状溝２５および下補助環状溝２６の各溝底面２５ｃ、２６ｃは、環状溝１５における径方向の内端部より径方向の外側に位置している。 The bottom surfaces 25c and 26c of the upper auxiliary annular groove 25 and the lower auxiliary annular groove 26 are formed in a curved surface shape with protrusions toward the inside in the radial direction. In the vertical cross-sectional view, the radii of curvature of each of the groove bottom surfaces 25c and 26c are equal to each other. In the illustrated example, the radius of curvature of each of the groove bottom surfaces 25c and 26c is, for example, about 0.5 mm in the vertical cross-sectional view. In the vertical cross-sectional view, the radii of curvature of each of the groove bottom surfaces 25c and 26c may be different from each other.
The radial positions of the bottom surfaces 25c and 26c of the upper auxiliary annular groove 25 and the lower auxiliary annular groove 26 are equal to each other. The bottom surfaces 25c and 26c of the upper auxiliary annular groove 25 and the lower auxiliary annular groove 26 are located radially outside the inner end portion in the annular groove 15.

上補助環状溝２５の上壁面２５ａは、溝底面２５ｃから上方に向かうに従い漸次、径方向の外側に向けて延びている。上壁面２５ａの上端部は、胴部１３において、上補助環状溝２５に対して上方から連なる部分（以下、上連設部という）１３ｂに段差なく連なっている。上補助環状溝２５の上壁面２５ａは、径方向の外側に向けて突の曲面状に形成されている。上下方向に沿う縦断面視において、上補助環状溝２５における上壁面２５ａの長さは、下壁面２５ｂの長さより長い。前記縦断面視で下壁面２５ｂは、径方向の外側に向けて突の曲面状に形成され、曲率半径が約２ｍｍとなっている。
なお、前記縦断面視において、上補助環状溝２５の上壁面２５ａは真直ぐ延びてもよく、上補助環状溝２５における上壁面２５ａの長さを、下壁面２５ｂの長さ以下としてもよい。 The upper wall surface 25a of the upper auxiliary annular groove 25 gradually extends outward in the radial direction from the groove bottom surface 25c toward the upper side. The upper end portion of the upper wall surface 25a is continuously connected to the portion (hereinafter referred to as the upper continuous portion) 13b which is connected to the upper auxiliary annular groove 25 from above in the body portion 13 without a step. The upper wall surface 25a of the upper auxiliary annular groove 25 is formed in a curved surface shape so as to be outward in the radial direction. In the vertical cross-sectional view along the vertical direction, the length of the upper wall surface 25a in the upper auxiliary annular groove 25 is longer than the length of the lower wall surface 25b. In the vertical cross-sectional view, the lower wall surface 25b is formed in a curved surface shape with a protrusion toward the outside in the radial direction, and has a radius of curvature of about 2 mm.
In the vertical cross-sectional view, the upper wall surface 25a of the upper auxiliary annular groove 25 may extend straight, and the length of the upper wall surface 25a in the upper auxiliary annular groove 25 may be less than or equal to the length of the lower wall surface 25b.

下補助環状溝２６の下壁面２６ｂは、溝底面２６ｃから下方に向かうに従い漸次、径方向の外側に向けて延びている。下壁面２６ｂの下端部は、胴部１３において、下補助環状溝２６に対して下方から連なる部分（以下、下連設部という）１３ｃに段差なく連なっている。下補助環状溝２６の下壁面２６ｂは、径方向の外側に向けて突の曲面状に形成されている。前記縦断面視において、下補助環状溝２６における下壁面２６ｂの長さは、上壁面２６ａの長さより長い。前記縦断面視で上壁面２６ａは、径方向の外側に向けて突の曲面状に形成され、曲率半径が約２ｍｍとなっている。
なお、前記縦断面視において、下補助環状溝２６の下壁面２６ｂは真直ぐ延びてもよく、下補助環状溝２６における下壁面２６ｂの長さを、上壁面２６ａの長さ以下としてもよい。 The lower wall surface 26b of the lower auxiliary annular groove 26 gradually extends outward from the bottom surface 26c of the groove in the downward direction. The lower end portion of the lower wall surface 26b is connected to the lower auxiliary annular groove 26 from below (hereinafter referred to as the lower continuous portion) 13c without a step in the body portion 13. The lower wall surface 26b of the lower auxiliary annular groove 26 is formed in a curved surface shape that protrudes outward in the radial direction. In the vertical cross-sectional view, the length of the lower wall surface 26b in the lower auxiliary annular groove 26 is longer than the length of the upper wall surface 26a. In the vertical cross-sectional view, the upper wall surface 26a is formed in a curved surface shape with a protrusion toward the outside in the radial direction, and has a radius of curvature of about 2 mm.
In the vertical cross-sectional view, the lower wall surface 26b of the lower auxiliary annular groove 26 may extend straight, and the length of the lower wall surface 26b in the lower auxiliary annular groove 26 may be less than or equal to the length of the upper wall surface 26a.

前記縦断面視において、下補助環状溝２６の下壁面２６ｂの曲率半径は、上補助環状溝２５の上壁面２５ａの曲率半径より小さい。前記縦断面視において、下補助環状溝２６の下壁面２６ｂの曲率半径は、例えば約９ｍｍとされ、上補助環状溝２５の上壁面２５ａの曲率半径は、例えば約１６ｍｍとなっている。
なお、前記縦断面視において、下補助環状溝２６の下壁面２６ｂの曲率半径を、上補助環状溝２５の上壁面２５ａの曲率半径以上としてもよい。 In the vertical cross-sectional view, the radius of curvature of the lower wall surface 26b of the lower auxiliary annular groove 26 is smaller than the radius of curvature of the upper wall surface 25a of the upper auxiliary annular groove 25. In the vertical cross-sectional view, the radius of curvature of the lower wall surface 26b of the lower auxiliary annular groove 26 is, for example, about 9 mm, and the radius of curvature of the upper wall surface 25a of the upper auxiliary annular groove 25 is, for example, about 16 mm.
In the vertical cross-sectional view, the radius of curvature of the lower wall surface 26b of the lower auxiliary annular groove 26 may be equal to or greater than the radius of curvature of the upper wall surface 25a of the upper auxiliary annular groove 25.

胴部１３において、環状溝１５と上補助環状溝２５との間、並びに環状溝１５と下補助環状溝２６との間に位置する各部分は、径方向の外側に向けて突の曲面状に形成された上突曲面部２７および下突曲面部２８となっている。
なお、胴部１３において、環状溝１５と上補助環状溝２５との間、並びに環状溝１５と下補助環状溝２６との間に位置する各部分は、前記縦断面視で上下方向に延びてもよい。 In the body portion 13, each portion located between the annular groove 15 and the upper auxiliary annular groove 25 and between the annular groove 15 and the lower auxiliary annular groove 26 has a curved surface shape protruding outward in the radial direction. The formed upper protrusion curved surface portion 27 and lower protrusion curved surface portion 28 are formed.
In the body portion 13, each portion located between the annular groove 15 and the upper auxiliary annular groove 25 and between the annular groove 15 and the lower auxiliary annular groove 26 extends in the vertical direction in the vertical cross-sectional view. May be good.

上突曲面部２７は、上補助環状溝２５の下壁面２５ｂの下端、および環状溝１５の上端に段差なく連なり、下突曲面部２８は、下補助環状溝２６の上壁面２６ａの上端、および環状溝１５の下端に段差なく連なっている。
上突曲面部２７の径方向の外端部、および下突曲面部２８の径方向の外端部それぞれの径方向の位置は、互いに同等になっている。 The upper protrusion curved surface portion 27 is continuously connected to the lower end of the lower wall surface 25b of the upper auxiliary annular groove 25 and the upper end of the annular groove 15 without a step, and the lower protrusion curved surface portion 28 is connected to the upper end of the upper wall surface 26a of the lower auxiliary annular groove 26 and the upper end. It is continuous with the lower end of the annular groove 15 without a step.
The radial positions of the radial outer end portion of the upper protruding curved surface portion 27 and the radial outer end portion of the lower protruding curved surface portion 28 are equal to each other.

ここで、胴部１３における上連設部１３ｂおよび下連設部１３ｃそれぞれの径方向の位置は、互いに同等になっている。上突曲面部２７の径方向の外端部、下突曲面部２８の径方向の外端部、上連設部１３ｂ、および下連設部１３ｃそれぞれの径方向の位置は、互いに同等になっている。
なお、上突曲面部２７の径方向の外端部、下突曲面部２８の径方向の外端部、上連設部１３ｂ、および下連設部１３ｃそれぞれの径方向の位置を互いに異ならせてもよい。 Here, the positions of the upper continuous portion 13b and the lower continuous portion 13c in the body portion 13 in the radial direction are the same as each other. The radial positions of the radial outer end of the upper protruding curved surface portion 27, the radial outer end portion of the lower protruding curved surface portion 28, the upper continuous portion 13b, and the lower continuous portion 13c are equal to each other. ing.
The radial positions of the radial outer end of the upper protruding curved surface portion 27, the radial outer end portion of the lower protruding curved surface portion 28, the upper continuous portion 13b, and the lower continuous portion 13c are made different from each other. You may.

前記縦断面視において、上突曲面部２７および下突曲面部２８の各曲率半径は互いに同等になっている。前記縦断面視において、上突曲面部２７および下突曲面部２８の各曲率半径は例えば約２ｍｍとなっている。なお、前記縦断面視において、上突曲面部２７および下突曲面部２８の各曲率半径を互いに異ならせてもよい。
前記縦断面視において、上突曲面部２７および下突曲面部２８の各曲率半径は、溝底面２５ｃ、２６ｃの曲率半径より大きく、かつ下補助環状溝２６の下壁面２６ｂ、上補助環状溝２５の上壁面２５ａ、および環状溝１５の各曲率半径より小さい。前記縦断面視で環状溝１５の曲率半径は、約３．７ｍｍとなっている。 In the vertical cross-sectional view, the radius of curvature of the upper protrusion curved surface portion 27 and the lower protrusion curved surface portion 28 are equal to each other. In the vertical cross-sectional view, each radius of curvature of the upper protrusion curved surface portion 27 and the lower protrusion curved surface portion 28 is, for example, about 2 mm. In the vertical cross-sectional view, the radius of curvature of the upper protrusion curved surface portion 27 and the lower protrusion curved surface portion 28 may be different from each other.
In the vertical cross-sectional view, the radius of curvature of the upper protrusion curved surface portion 27 and the lower protrusion curved surface portion 28 is larger than the radius of curvature of the groove bottom surfaces 25c and 26c, and the lower wall surface 26b and the upper auxiliary annular groove 25 of the lower auxiliary annular groove 26. It is smaller than each radius of curvature of the upper wall surface 25a and the annular groove 15. The radius of curvature of the annular groove 15 is about 3.7 mm in the vertical cross-sectional view.

以上説明したように、本実施形態によるボトル１によれば、胴部１３に、環状溝１５を上下方向に挟む両側に各別に配設された上補助環状溝２５および下補助環状溝２６が形成されているので、横荷重に対する剛性を確実に向上させることができるとともに、上下方向に大きな圧縮荷重が加えられたときに、胴部１３が、径方向のうちの一方向に拡大し、かつ前記一方向に直交する他方向に縮小するように復元不能に変形しようとしたときに、胴部１３において、環状溝１５と、上補助環状溝２５および下補助環状溝２６と、の間に位置する上突曲面部２７および下突曲面部２８がリブとして作用することとなり、胴部１３の座屈変形を抑えることができる。 As described above, according to the bottle 1 according to the present embodiment, the upper auxiliary annular groove 25 and the lower auxiliary annular groove 26 separately arranged on both sides of the annular groove 15 in the vertical direction are formed on the body portion 13. Therefore, the rigidity against a lateral load can be surely improved, and when a large compressive load is applied in the vertical direction, the body portion 13 expands in one of the radial directions, and the above-mentioned It is located between the annular groove 15 and the upper auxiliary annular groove 25 and the lower auxiliary annular groove 26 in the body 13 when an attempt is made to irrecoverably deform so as to shrink in the other direction orthogonal to one direction. The upper protrusion curved surface portion 27 and the lower protrusion curved surface portion 28 act as ribs, and the buckling deformation of the body portion 13 can be suppressed.

しかも、上補助環状溝２５および下補助環状溝２６の各深さが、環状溝１５の深さより浅いので、上下方向に大きな圧縮荷重が加えられたときに、上補助環状溝２５および下補助環状溝２６が上下方向につぶれるように、胴部１３が変形するのを抑制することが可能になり、胴部１３の座屈強度を確実に向上させることができる。
また、上補助環状溝２５および下補助環状溝２６の各幅が、環状溝１５の幅より狭いので、上下方向に大きな圧縮荷重が加えられたときに、上補助環状溝２５および下補助環状溝２６が上下方向につぶれるように、胴部１３が変形するのを確実に抑制することができる。 Moreover, since the depths of the upper auxiliary annular groove 25 and the lower auxiliary annular groove 26 are shallower than the depth of the annular groove 15, the upper auxiliary annular groove 25 and the lower auxiliary annular groove 25 and the lower auxiliary annular groove 25 are applied when a large compressive load is applied in the vertical direction. It is possible to suppress the deformation of the body portion 13 so that the groove 26 is crushed in the vertical direction, and the buckling strength of the body portion 13 can be reliably improved.
Further, since the widths of the upper auxiliary annular groove 25 and the lower auxiliary annular groove 26 are narrower than the width of the annular groove 15, the upper auxiliary annular groove 25 and the lower auxiliary annular groove 25 and the lower auxiliary annular groove are applied when a large compressive load is applied in the vertical direction. It is possible to surely suppress the deformation of the body portion 13 so that the 26 is crushed in the vertical direction.

また、胴部１３において、環状溝１５と、上補助環状溝２５および下補助環状溝２６と、の間に位置する上突曲面部２７および下突曲面部２８が、径方向の外側に向けて突の曲面状に形成されるとともに、環状溝１５と、上補助環状溝２５および下補助環状溝２６と、に段差なく連なっているので、上下方向に大きな圧縮荷重が加えられたときに、胴部１３が座屈変形するのを確実に抑制することができるとともに、横荷重に対する剛性を確実に向上させることができる。 Further, in the body portion 13, the upper protrusion curved surface portion 27 and the lower protrusion curved surface portion 28 located between the annular groove 15, the upper auxiliary annular groove 25 and the lower auxiliary annular groove 26 are directed outward in the radial direction. It is formed in a curved shape with a protrusion, and is connected to the annular groove 15, the upper auxiliary annular groove 25, and the lower auxiliary annular groove 26 without any step. Therefore, when a large compressive load is applied in the vertical direction, the body is formed. It is possible to reliably suppress buckling deformation of the portion 13, and it is possible to reliably improve the rigidity against a lateral load.

次に、以上説明した作用効果の検証試験について説明する。 Next, the verification test of the action and effect described above will be described.

実施例として、図１に示すボトル１を採用し、比較例として、実施例のボトル１において、上補助環状溝２５および下補助環状溝２６を有しないボトルを採用した。
そして、実施例および比較例それぞれについて、内容量に対して５％のヘッドスペースを設けて密封した状態で、上下方向に圧縮したときの座屈強度、および変位量を、数値解析により算出した。座屈強度は、座屈変形する直前にボトルが受けていた軸力であり、変位量は、座屈変形する直前までのボトルの全高さの変位量である。
その結果、比較例では、座屈強度が３１０．２Ｎ、変位量が２．９４ｍｍであり、実施例では、座屈強度が３５３．０Ｎ、変位量が３．６９ｍｍであり、比較例および実施例ともに座屈箇所が胴部の下端部であることが確認された。すなわち、実施例では、比較例と比べて、座屈強度が１３．８％向上し、変位量も２５．５％向上したことが確認された。 As an example, the bottle 1 shown in FIG. 1 was adopted, and as a comparative example, in the bottle 1 of the example, a bottle having no upper auxiliary annular groove 25 and a lower auxiliary annular groove 26 was adopted.
Then, for each of the examples and the comparative examples, the buckling strength and the amount of displacement when compressed in the vertical direction in a sealed state with a head space of 5% with respect to the internal volume were calculated by numerical analysis. The buckling strength is the axial force received by the bottle immediately before the buckling deformation, and the displacement amount is the displacement amount of the total height of the bottle until immediately before the buckling deformation.
As a result, in the comparative example, the buckling strength was 310.2 N and the displacement amount was 2.94 mm, and in the examples, the buckling strength was 353.0 N and the displacement amount was 3.69 mm. In both cases, it was confirmed that the buckling point was the lower end of the body. That is, it was confirmed that in the examples, the buckling strength was improved by 13.8% and the displacement amount was also improved by 25.5% as compared with the comparative example.

なお、本発明の技術範囲は、前述した実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲において種々の変更を加えることが可能である。 The technical scope of the present invention is not limited to the above-described embodiment, and various changes can be made without departing from the spirit of the present invention.

例えば、前記実施形態では、ヒール部１７が、径方向の外側に向けて突の曲面状に形成された構成を示したが、上下方向に延びる構成を採用してもよい。
また、ヒール部１７は、第２部分２２および第３部分２３を有さず、全周にわたって第１部分２１で構成されてもよい。 For example, in the above-described embodiment, the heel portion 17 is formed in a curved surface shape with a protrusion toward the outside in the radial direction, but a configuration in which the heel portion 17 extends in the vertical direction may be adopted.
Further, the heel portion 17 does not have the second portion 22 and the third portion 23, and may be composed of the first portion 21 over the entire circumference.

また、ボトル１を形成する合成樹脂材料は、例えばポリエチレンテレフタレートや、ポリエチレンナフタレート、非晶性ポリエステル等、またはこれらのブレンド材料等、適宜変更してもよい。
さらに、ボトル１は、単層構造体に限らず中間層を有する積層構造体としてもよい。この中間層としては、例えばガスバリア性を有する樹脂材料からなる層、再生材からなる層、若しくは酸素吸収性を有する樹脂材料からなる層等が挙げられる。
また、前記実施形態では、口部１１、肩部１２、胴部１３および底部１４のそれぞれのボトル軸Ｏに直交する横断面視形状を円形状としたが、これに限らず例えば、角形状にする等適宜変更してもよい。 Further, the synthetic resin material forming the bottle 1 may be appropriately changed, for example, polyethylene terephthalate, polyethylene naphthalate, amorphous polyester, or a blend material thereof.
Further, the bottle 1 is not limited to the single-layer structure, but may be a laminated structure having an intermediate layer. Examples of the intermediate layer include a layer made of a resin material having a gas barrier property, a layer made of a recycled material, a layer made of a resin material having an oxygen absorption property, and the like.
Further, in the above-described embodiment, the cross-sectional view shape orthogonal to the bottle axis O of each of the mouth portion 11, the shoulder portion 12, the body portion 13, and the bottom portion 14 is a circular shape, but the shape is not limited to this, and is not limited to the rectangular shape, for example. It may be changed as appropriate.

その他、本発明の趣旨を逸脱しない範囲で、前記実施形態における構成要素を周知の構成要素に置き換えることは適宜可能であり、また、前記変形例を適宜組み合わせてもよい。 In addition, it is possible to appropriately replace the components in the embodiment with well-known components without departing from the spirit of the present invention, and the modifications may be appropriately combined.

１ ボトル
１３ 胴部
１５ 環状溝
２５ 上補助環状溝（補助環状溝）
２６ 下補助環状溝（補助環状溝） 1 Bottle 13 Body 15 Circular groove 25 Upper auxiliary annular groove (auxiliary annular groove)
26 Lower auxiliary annular groove (auxiliary annular groove)

Claims (2)

合成樹脂材料で形成された有底筒状のボトルであって、
胴部に、全周にわたって連続して延びる環状溝と、全周にわたって連続して延びるとともに、前記環状溝を上下方向に挟む両側に各別に配設された一対の補助環状溝と、が形成され、
前記補助環状溝の深さは、前記環状溝の深さより浅く、
前記胴部において、前記環状溝と一対の前記補助環状溝との間に位置する各部分は、径方向の外側に向けて突の曲面状に形成されるとともに、前記環状溝および前記補助環状溝に段差なく連なり、
前記環状溝は、径方向の内側に向けて窪む凹曲面状に形成され、
一対の前記補助環状溝はそれぞれ、上側に位置する上壁面、下側に位置する下壁面、および前記上壁面と前記下壁面とを連結する溝底面により画成され、
一対の前記補助環状溝の各前記溝底面は、径方向の内側に向けて突の曲面状に形成され、
一対の前記補助環状溝のうち、上側に位置する上補助環状溝の前記上壁面は、前記溝底面から上方に向かうに従い漸次、径方向の外側に向けて延びるとともに、径方向の外側に向けて突の曲面状に形成されており、前記胴部において、前記上補助環状溝に対して上方から連なる部分に段差なく連なり、
一対の前記補助環状溝のうち、下側に位置する下補助環状溝の前記下壁面は、前記溝底面から下方に向かうに従い漸次、径方向の外側に向けて延びるとともに、径方向の外側に向けて突の曲面状に形成されており、前記胴部において、前記下補助環状溝に対して下方から連なる部分に段差なく連なり、
上下方向に沿う縦断面視において、前記胴部のうち、前記環状溝と一対の前記補助環状溝との間に位置する各部分の曲率半径は、前記溝底面の曲率半径より大きく、かつ前記下補助環状溝の前記下壁面、前記上補助環状溝の前記上壁面、および前記環状溝の各曲率半径より小さいことを特徴とするボトル。 A bottomed tubular bottle made of synthetic resin material.
An annular groove that extends continuously over the entire circumference and a pair of auxiliary annular grooves that extend continuously over the entire circumference and are separately arranged on both sides of the annular groove in the vertical direction are formed on the body portion. ,
The depth of the auxiliary annular groove is shallower than the depth of the annular groove.
In the body portion, each portion located between the annular groove and the pair of auxiliary annular grooves is formed in a curved surface shape with a protrusion toward the outside in the radial direction, and the annular groove and the auxiliary annular groove are formed. Without steps,
The annular groove is formed in a concave curved surface shape that is recessed inward in the radial direction.
The pair of auxiliary annular grooves are defined by an upper wall surface located on the upper side, a lower wall surface located on the lower side, and a groove bottom surface connecting the upper wall surface and the lower wall surface, respectively.
The bottom surface of each of the pair of auxiliary annular grooves is formed in a curved surface shape with a protrusion toward the inside in the radial direction.
Of the pair of auxiliary annular grooves, the upper wall surface of the upper auxiliary annular groove located on the upper side gradually extends outward in the radial direction as it goes upward from the bottom surface of the groove, and toward the outer side in the radial direction. It is formed in the shape of a curved surface of a protrusion, and in the body portion, it is continuously connected to the portion connected from above with respect to the upper auxiliary annular groove without a step.
Of the pair of auxiliary annular grooves, the lower wall surface of the lower auxiliary annular groove located on the lower side gradually extends outward in the radial direction from the bottom surface of the groove downward and toward the outer side in the radial direction. It is formed in the shape of a curved surface with a protrusion, and in the body portion, it is continuously connected to the portion connected from below with respect to the lower auxiliary annular groove without a step.
In the vertical cross-sectional view along the vertical direction, the radius of curvature of each portion of the body portion located between the annular groove and the pair of auxiliary annular grooves is larger than the radius of curvature of the bottom surface of the groove and below the groove. A bottle characterized by being smaller than the radius of curvature of the lower wall surface of the auxiliary annular groove, the upper wall surface of the upper auxiliary annular groove, and the annular groove . 前記補助環状溝の幅は、前記環状溝の幅より狭いことを特徴とする請求項１に記載のボトル。 The bottle according to claim 1, wherein the width of the auxiliary annular groove is narrower than the width of the annular groove.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100108699A1 (en) 2008-10-30 2010-05-06 Dennis Stephen R Compression-Resistant Container
JP2016132501A (en) 2015-01-22 2016-07-25 大日本印刷株式会社 Plastic bottle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100108699A1 (en) 2008-10-30 2010-05-06 Dennis Stephen R Compression-Resistant Container
JP2016132501A (en) 2015-01-22 2016-07-25 大日本印刷株式会社 Plastic bottle

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