JP2016020240A - Bottle - Google Patents

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JP2016020240A
JP2016020240A JP2015216996A JP2015216996A JP2016020240A JP 2016020240 A JP2016020240 A JP 2016020240A JP 2015216996 A JP2015216996 A JP 2015216996A JP 2015216996 A JP2015216996 A JP 2015216996A JP 2016020240 A JP2016020240 A JP 2016020240A
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bottle
grounding
circumferential direction
leg
ground contact
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JP6254992B2 (en
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宏明 今井
Hiroaki Imai
宏明 今井
飯塚 高雄
Takao Iizuka
高雄 飯塚
浩治 井澤
Koji Izawa
浩治 井澤
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Yoshino Kogyosho Co Ltd
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Yoshino Kogyosho Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To suppress a bottle from tumbling down even when suppressing small ratio of a grounding diameter of a grounding part of the bottle to the overall height.SOLUTION: A bottom part 14 of a bottle 10 includes a center wall part 15 positioned on a bottle axis O and a connection circumferential wall part 16 connecting an outer circumferential edge of the center wall part 15 and a barrel part to each other, the connection circumferential wall part 16 includes three or more longitudinal recessed streak parts 17 formed circumferentially at intervals. A leg part 18 which projects from the center wall part 15 outward the bottle axis O is formed circumferentially at each of parts positioned between adjacent longitudinal recessed streak parts 17 of the connection circumferential wall part 16, a grounding part 22 which extends circumferentially is formed on the leg part 18, and a plurality of grounding parts 22 are arranged intermittently to the overall circumferential length in bottom surface view, ratio of a grounding diameter D of the grounding part 22 to the overall height of the bottle 10 being 0.230 or less and the total angle of center angles α that the respective grounding parts 22 contain around the bottle axis O in the bottom surface view being 60° or more and 180° or less.SELECTED DRAWING: Figure 2

Description

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

従来から、例えば下記特許文献1に示されるような、筒状の口部、肩部および胴部と、有底筒状の底部と、が合成樹脂材料で一体に形成されたボトルが知られている。前記底部は、ボトル軸上に位置する中央壁部と、該中央壁部の外周縁と胴部とを連結する連結周壁部と、を備えている。連結周壁部には、周方向に間隔をあけて3つ以上の縦凹条部が形成されており、該連結周壁部において周方向に隣り合う縦凹条部同士の間に位置する各部分には、中央壁部よりもボトル軸方向の外側に向けて突出する脚部が形成されている。脚部には、周方向に延在する接地部が形成され、複数の接地部は、底部をボトル軸方向の外側から見た底面視において、周方向の全長にわたって間欠的に配置されている。   Conventionally, for example, a bottle in which a cylindrical mouth portion, a shoulder portion, and a trunk portion and a bottomed cylindrical bottom portion are integrally formed of a synthetic resin material as shown in Patent Document 1 below is known. Yes. The bottom portion includes a central wall portion located on the bottle shaft, and a connecting peripheral wall portion that connects the outer peripheral edge of the central wall portion and the body portion. The connecting peripheral wall portion is formed with three or more vertical concave strip portions spaced in the circumferential direction, and each portion located between the adjacent vertical concave strip portions in the circumferential direction in the connecting peripheral wall portion. Are formed with leg portions that project outward from the central wall portion in the bottle axial direction. The leg portion is formed with a grounding portion extending in the circumferential direction, and the plurality of grounding portions are intermittently arranged over the entire length in the circumferential direction when the bottom portion is viewed from the outside in the bottle axial direction.

特許第3616687号公報Japanese Patent No. 3616687

しかしながら、前記従来のボトルでは、例えば、ボトルの耐圧性を向上させるために接地部の接地径を小さくしたり、デザインのためにボトルをボトル軸方向に細長い形状にしたり等することにより、ボトルの全高に対する接地部の接地径の比が低く抑えられた場合、ボトルが正立状態から転倒し易くなるおそれがあった。すると例えば、ボトルに内容物を充填するため、空状態のボトルを充填ラインに連立させて搬送するときに、ボトルが転倒して搬送が停止される等の問題がある。   However, in the conventional bottle, for example, by reducing the grounding diameter of the grounding portion in order to improve the pressure resistance of the bottle, or by making the bottle elongated in the axial direction of the bottle for design, etc. When the ratio of the ground contact diameter to the total height is kept low, there is a risk that the bottle will easily fall from an upright state. Then, for example, in order to fill the bottle with the contents, there is a problem that when the empty bottle is transported while being connected to the filling line, the bottle falls and the transport is stopped.

本発明は、前述した事情に鑑みてなされたものであって、その目的は、ボトルの全高に対する接地部の接地径の比を低く抑えても、転倒を抑制することができるボトルを提供することである。   The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a bottle that can suppress overturning even if the ratio of the contact diameter of the contact portion to the overall height of the bottle is kept low. It is.

前記課題を解決するために、本発明は以下の手段を提案している。
本発明に係るボトルは、筒状の口部、肩部および胴部と、有底筒状の底部と、が合成樹脂材料で一体に形成され、前記底部は、ボトル軸上に位置する中央壁部と、該中央壁部の外周縁と前記胴部とを連結する連結周壁部と、を備え、前記連結周壁部には、周方向に間隔をあけて3つ以上の縦凹条部が形成され、前記連結周壁部において周方向に隣り合う縦凹条部同士の間に位置する各部分には、前記中央壁部よりもボトル軸方向の外側に向けて突出する脚部が形成され、該脚部には、周方向に延在する接地部が形成され、複数の前記接地部は、前記底部をボトル軸方向の外側から見た底面視において、周方向の全長にわたって間欠的に配置され、当該ボトルの全高に対する前記接地部の接地径(ただし、60mm、64.61mm、66.43mmを除く)の比が0.230以下とされたボトルであって、前記底面視において、それぞれの前記接地部がなすボトル軸を中心とした中心角の合計角度は、60°以上180°以下であることを特徴とする。
In order to solve the above problems, the present invention proposes the following means.
In the bottle according to the present invention, a cylindrical mouth portion, a shoulder portion and a trunk portion, and a bottomed cylindrical bottom portion are integrally formed of a synthetic resin material, and the bottom portion is a central wall located on the bottle shaft. And a connecting peripheral wall portion that connects the outer peripheral edge of the central wall portion and the body portion, and the connecting peripheral wall portion is formed with three or more vertical recesses spaced in the circumferential direction. In each portion located between the longitudinal concave portions adjacent to each other in the circumferential direction in the connection peripheral wall portion, leg portions that protrude outward in the bottle axial direction from the central wall portion are formed, The leg portion is formed with a grounding portion extending in the circumferential direction, and the plurality of grounding portions are intermittently arranged over the entire length in the circumferential direction in a bottom view when the bottom portion is viewed from the outside in the bottle axial direction. The grounding diameter of the grounding part with respect to the total height of the bottle (however, 60 mm, 64.61 mm, 66.4 The ratio of the central angle centered on the bottle axis formed by each of the ground contact portions in the bottom view is 60 ° or more and 180 ° or less. It is characterized by being.

この発明によれば、前記合計角度が、60°以上180°以下であるので、接地径の大きさを抑えつつ、脚部における接地部の周方向に沿った大きさである脚幅を確保することが可能になり、ボトルの全高に対する接地部の接地径の比を0.230以下に抑えてもボトルの転倒を抑制することができるとともに、当該ボトルの賦形性(成形性)を確保し易くすることができる。   According to this invention, since the total angle is not less than 60 ° and not more than 180 °, a leg width that is a size along the circumferential direction of the ground contact portion in the leg portion is ensured while suppressing the size of the ground contact diameter. It is possible to prevent the bottle from falling even if the ratio of the contact diameter of the contact portion to the total height of the bottle is 0.230 or less, and to ensure the shapeability (formability) of the bottle. Can be made easier.

すなわち、合計角度の理論値は、下記(1)式で算出される。   That is, the theoretical value of the total angle is calculated by the following equation (1).

γ=360−2n・Arccos((2h/D)・tanθ)) ・・・ (1)
γ:合計角度(°)の理論値
n:脚部の数(n≧3)
h:空状態のボトルの重心高さ(mm)
D:接地部の接地径(mm)
θ:転倒角(°)の設計値
γ = 360-2n · Arccos ((2h / D) · tan θ)) (1)
γ: theoretical value of total angle (°) n: number of legs (n ≧ 3)
h: Height of center of gravity of empty bottle (mm)
D: Grounding diameter of grounding part (mm)
θ: Design value of the tipping angle (°)

なお転倒角θとは、水平方向に沿って延在する接地面にボトルを載置して、このボトルの縦凹条部における周方向の中央部が下方を向くように接地面を徐々に傾けていくことでボトルが転倒したときに、前記接地面が水平面に対してなす傾斜角度をいい、この転倒角θの設計値が11°以上であると、ボトルの転倒を効果的に抑制することができる。   The fall angle θ means that the bottle is placed on the ground contact surface extending in the horizontal direction, and the ground contact surface is gradually tilted so that the central portion in the circumferential direction of the vertical groove portion of the bottle faces downward. When the bottle falls over, it means the inclination angle that the ground contact surface makes with respect to the horizontal plane. If the design value of the fall angle θ is 11 ° or more, the bottle can be effectively prevented from falling over. Can do.

ここで上記(1)式に基づいて、ボトルの全高に対する接地部の接地径の比(接地径/全高)が0.230となるボトルにおいて、脚部の数nを5、空状態のボトルの重心高さhを107.5mm、接地部の接地径Dを49.45mm、転倒角θの設計値を11°とした場合における合計角度γの理論値を算出すると、約37°となる。すなわち、このようなボトルにおいて、合計角度γの実際の値を37°以上にすると、理論上はボトルの転倒を抑制することができる。なお、上記空状態のボトルにおける重心のボトル軸方向の位置は、ボトルの全高の1/2の高さ位置となっている。   Here, based on the above equation (1), in the bottle in which the ratio of the ground contact diameter to the total height of the bottle (ground contact diameter / total height) is 0.230, the number of legs n is 5, The theoretical value of the total angle γ is calculated to be approximately 37 ° when the center of gravity height h is 107.5 mm, the ground contact diameter D of the ground contact portion is 49.45 mm, and the design value of the falling angle θ is 11 °. That is, in such a bottle, if the actual value of the total angle γ is 37 ° or more, the bottle can be prevented from falling over in theory. Note that the position of the center of gravity of the empty bottle in the bottle axis direction is a half of the total height of the bottle.

しかしながら、前記合計角度が60°未満である場合、各脚部の脚幅が小さくなり過ぎ、これらの脚部の賦形性を確保することが困難になるおそれがある。
また、前記合計角度が180°よりも大きい場合、各縦凹条部の周方向に沿った大きさが小さくなり過ぎ、これらの縦凹条部の賦形性を確保することが困難になるおそれがある。
However, when the total angle is less than 60 °, the leg width of each leg portion becomes too small, and it may be difficult to ensure the shapeability of these leg portions.
Moreover, when the said total angle is larger than 180 degrees, the magnitude | size along the circumferential direction of each vertical groove part may become too small, and it may become difficult to ensure the shaping property of these vertical groove parts. There is.

以上より、前記合計角度が、37°よりも大きい60°以上で、かつ180°以下とすることで、当該ボトルの転倒を抑制することができるとともに、当該ボトルの賦形性を確保し易くすることができる。   As mentioned above, while making the said total angle 60 degrees or more larger than 37 degrees and 180 degrees or less, while being able to suppress the fall of the said bottle, it is easy to ensure the shaping property of the said bottle. be able to.

本発明に係るボトルによれば、ボトルの全高に対する接地部の接地径の比を低く抑えても、転倒を抑制することができる。   According to the bottle of the present invention, even if the ratio of the ground contact diameter of the ground contact portion to the overall height of the bottle is kept low, the overturn can be suppressed.

本発明の一実施形態に係るボトルの正面図である。It is a front view of the bottle which concerns on one Embodiment of this invention. 図1に示すボトルの底面図である。It is a bottom view of the bottle 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。このボトルには、例えば炭酸飲料等、密封された状態でボトル内圧を上昇させる内容物が充填されてもよく、例えば耐圧用ボトル、耐熱圧用ボトル等として用いてもよい。
図1に示すように、ボトル10は、筒状の口部11、肩部12および胴部13と、有底筒状の底部14と、が合成樹脂材料で一体に形成されており、例えば二軸延伸ブロー成形により形成される。なお前記合成樹脂材料として、例えばポリエチレンテレフタレート等を採用してもよい。
Hereinafter, a bottle according to an embodiment of the present invention will be described with reference to the drawings. The bottle may be filled with a content that increases the internal pressure of the bottle in a sealed state, such as a carbonated beverage, and may be used as a pressure-resistant bottle, a heat-resistant pressure bottle, or the like.
As shown in FIG. 1, a bottle 10 has a cylindrical mouth portion 11, a shoulder portion 12 and a trunk portion 13, and a bottomed cylindrical bottom portion 14 that are integrally formed of a synthetic resin material. It is formed by axial stretch blow molding. For example, polyethylene terephthalate may be employed as the synthetic resin material.

ここで口部11、肩部12、胴部13および底部14それぞれの中心軸線は、共通軸上に位置している。以下、この共通軸をボトル軸Oといい、ボトル軸O方向に沿った口部11側を上側、底部14側を下側という。また、ボトル軸Oに直交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。   Here, the central axes of the mouth part 11, the shoulder part 12, the body part 13 and the bottom part 14 are located on a common axis. Hereinafter, this common axis is referred to as the bottle axis O, the mouth 11 side along the bottle axis O direction is referred to as the upper side, and the bottom 14 side is referred to as the lower side. A direction perpendicular to the bottle axis O is referred to as a radial direction, and a direction around the bottle axis O is referred to as a circumferential direction.

口部11の外周面には、図示しないキャップが着脱可能に螺着される雄ネジが形成されている。肩部12は、上側から下側に向かうに従い漸次、拡径しており、肩部12の下端部は、胴部13の上端部と段差なく滑らかに連なっている。胴部13は、円筒状に形成されるとともに、ボトル軸O方向の全長にわたって同径となっており、図示の例では、胴部13がその全長にわたって、当該ボトル10において外径が最も大きい最大径部となっている。   A male screw to which a cap (not shown) is detachably screwed is formed on the outer peripheral surface of the mouth portion 11. The shoulder portion 12 gradually increases in diameter from the upper side toward the lower side, and the lower end portion of the shoulder portion 12 is smoothly connected to the upper end portion of the trunk portion 13 without a step. The body portion 13 is formed in a cylindrical shape and has the same diameter over the entire length in the bottle axis O direction. In the illustrated example, the body portion 13 has the largest outer diameter in the bottle 10 over the entire length. It is a diameter part.

図1および図2に示すように、底部14は、ボトル軸O上に位置する中央壁部15と、該中央壁部15の外周縁と胴部13とを連結する連結周壁部16と、を備えている。
中央壁部15の表裏面はそれぞれ、ボトル軸O方向を向くとともに、中央壁部15は、底部14を下側(ボトル軸方向の外側)から見た底面視において円形状に形成されており、図示の例では、中央壁部15はボトル軸Oと同軸に配置されている。
As shown in FIGS. 1 and 2, the bottom portion 14 includes a central wall portion 15 located on the bottle shaft O, and a connecting peripheral wall portion 16 that connects the outer peripheral edge of the central wall portion 15 and the body portion 13. I have.
Each of the front and back surfaces of the central wall portion 15 faces the bottle axis O direction, and the central wall portion 15 is formed in a circular shape in a bottom view when the bottom portion 14 is viewed from the lower side (outside in the bottle axis direction). In the illustrated example, the central wall portion 15 is arranged coaxially with the bottle axis O.

連結周壁部16には、周方向に間隔をあけて3つ以上の縦凹条部17が形成されるとともに、連結周壁部16において周方向で隣り合う縦凹条部17同士の間に位置する各部分には、中央壁部15よりも下側(ボトル軸方向の外側)に向けて突出する脚部18が形成されており、このボトル10の底部は、いわゆるペタロイド形状に形成されている。
縦凹条部17および脚部18はそれぞれ、奇数個ずつ形成されており、図示の例では、5個ずつ形成されている。また複数の縦凹条部17は、互いに同形同大に形成されるとともに、周方向に同等の間隔をあけて配置されている。さらに複数の脚部18は、互いに同形同大に形成されるとともに、周方向に同等の間隔をあけて配置されている。
Three or more vertical concave strips 17 are formed in the connection peripheral wall 16 at intervals in the circumferential direction, and are positioned between the vertical concave strips 17 adjacent in the circumferential direction in the connection peripheral wall 16. Each part is formed with a leg 18 projecting downward (outside in the bottle axial direction) from the central wall 15, and the bottom of the bottle 10 is formed in a so-called petaloid shape.
Each of the vertical concave stripe portion 17 and the leg portion 18 is formed in an odd number, and in the illustrated example, five pieces are formed. In addition, the plurality of vertical recess portions 17 are formed in the same shape and size as each other, and are arranged at equal intervals in the circumferential direction. Further, the plurality of leg portions 18 are formed in the same shape and size as each other, and are arranged at equal intervals in the circumferential direction.

脚部18は、中央壁部15から径方向の外側に向けて延在する内壁部19と、内壁部19における径方向の外端部から上側に向けて延在し上端部が胴部13に連結される外壁部20と、周方向に間隔をあけて配置され内壁部19および外壁部20における周方向の各側端部に連結された一対の側壁部21と、を備えている。
内壁部19の表裏面はそれぞれ、ボトル軸O方向を向いており、内壁部19は、径方向の外側に向かうに従い漸次、下方に向けて延在している。内壁部19は、当該ボトル10の縦断面視において、上方に向けて突となる曲線状をなすように湾曲している。内壁部19における径方向の外端部は、胴部13よりも径方向の内側に位置している。
The leg portion 18 has an inner wall portion 19 extending from the central wall portion 15 toward the outer side in the radial direction, and an upper end portion extending from the outer end portion in the radial direction of the inner wall portion 19 toward the upper side. The outer wall part 20 to be connected is provided, and a pair of side wall parts 21 that are arranged at intervals in the circumferential direction and are connected to the side end parts in the circumferential direction of the inner wall part 19 and the outer wall part 20 are provided.
The front and back surfaces of the inner wall portion 19 each face the bottle axis O direction, and the inner wall portion 19 gradually extends downward as it goes outward in the radial direction. The inner wall portion 19 is curved so as to form a curved shape that protrudes upward in the longitudinal sectional view of the bottle 10. The radially outer end portion of the inner wall portion 19 is located on the radially inner side of the body portion 13.

外壁部20の表裏面はそれぞれ、径方向を向いており、外壁部20は、下側から上側に向かうに従い漸次、径方向の外側に向けて延在している。外壁部20において内壁部19に連結される下端部は、前記縦断面視において、径方向の外側に向けて突となる曲線状をなすように湾曲している。外壁部20において胴部13に連結される上端部は、胴部13と径方向の位置が同等とされ、胴部13と段差なく滑らかに連なっている。
側壁部21の表裏面はそれぞれ、周方向を向いており、側壁部21の表面は、縦凹条部17を画成する壁面を構成している。
The front and back surfaces of the outer wall portion 20 each face the radial direction, and the outer wall portion 20 gradually extends outward in the radial direction from the lower side toward the upper side. A lower end portion connected to the inner wall portion 19 in the outer wall portion 20 is curved so as to form a curved shape projecting outward in the radial direction in the longitudinal sectional view. The upper end portion of the outer wall portion 20 that is connected to the body portion 13 has the same radial position as the body portion 13 and is smoothly connected to the body portion 13 without any step.
The front and back surfaces of the side wall portion 21 face each other in the circumferential direction, and the surface of the side wall portion 21 constitutes a wall surface that defines the vertical concave stripe portion 17.

また脚部18には、周方向に延在する接地部22が形成されている。接地部22は、脚部18における内壁部19と外壁部20との接続部分とされており、当該脚部18の下端となっている。さらに図2に示すように、複数の接地部22は、前記底面視において、周方向の全長にわたって間欠的に配置されており、ボトル軸Oを中心とする同一の仮想円Rに沿って延在している。   The leg 18 is formed with a grounding portion 22 extending in the circumferential direction. The grounding portion 22 is a connecting portion between the inner wall portion 19 and the outer wall portion 20 in the leg portion 18, and serves as a lower end of the leg portion 18. Further, as shown in FIG. 2, the plurality of grounding portions 22 are intermittently disposed over the entire length in the circumferential direction in the bottom view, and extend along the same virtual circle R around the bottle axis O. doing.

なお接地部22は、径方向に沿った大きさが極めて小さく、周方向に沿った各位置で接地面に点接触するような線状に形成されていてもよく、径方向に沿った大きさが確保され、周方向に沿った各位置で接地面に線接触するような面状に形成されていてもよい。また、接地部22が前述のような面状に形成されている場合、接地部22の接地径Dは、例えばボトル軸Oを中心とし、かつ複数の接地部22における径方向の外側の各端縁を通過する仮想円の直径としてもよい。   The grounding portion 22 has a very small size along the radial direction, and may be formed in a linear shape so as to make point contact with the grounding surface at each position along the circumferential direction. May be secured, and may be formed in a planar shape in line contact with the ground contact surface at each position along the circumferential direction. In addition, when the grounding portion 22 is formed in a planar shape as described above, the grounding diameter D of the grounding portion 22 is, for example, centered on the bottle axis O and each end on the radially outer side of the plurality of grounding portions 22. It is good also as a diameter of the virtual circle which passes an edge.

ここで図1および図2に示すように、当該ボトル10の全高Lであるボトル軸O方向に沿った口部11の上端から底部14の下端までの長さに対する接地部22の接地径Dである前記仮想円Rの直径の比、つまりD/Lは0.230以下となっている。
そして本実施形態では、前記底面視において、それぞれの接地部22がなすボトル軸Oを中心とした中心角αの合計角度(図示の例では、5・α)は、60°以上180°以下となっている。
Here, as shown in FIGS. 1 and 2, the grounding diameter D of the grounding portion 22 with respect to the length from the upper end of the mouth portion 11 to the lower end of the bottom portion 14 along the bottle axis O direction, which is the total height L of the bottle 10. The ratio of the diameter of the virtual circle R, that is, D / L is 0.230 or less.
In the present embodiment, in the bottom view, the total angle (5 · α in the illustrated example) of the central angle α around the bottle axis O formed by each grounding portion 22 is 60 ° or more and 180 ° or less. It has become.

以上説明したように、本実施形態に係るボトル10によれば、前記合計角度が、60°以上180°以下であるので、接地径Dの大きさを抑えつつ、脚部18における接地部22の周方向に沿った大きさである脚幅Wを確保することが可能になり、ボトル10の全高Lに対する接地部22の接地径Dの比を0.230以下のような細身で全高の高いボトル10においても転倒を抑制することができるとともに、当該ボトル10の賦形性(成形性)を確保し易くすることができる。   As described above, according to the bottle 10 according to this embodiment, since the total angle is 60 ° or more and 180 ° or less, the size of the ground contact diameter D is suppressed, and the ground contact portion 22 of the leg portion 18 is suppressed. A leg width W that is a size along the circumferential direction can be secured, and the ratio of the ground contact diameter D of the ground contact portion 22 to the total height L of the bottle 10 is slender and high in overall height such as 0.230 or less. 10 can suppress overturning and can easily ensure the shapeability (moldability) of the bottle 10.

すなわち、合計角度の理論値は、下記(1)式で算出される。   That is, the theoretical value of the total angle is calculated by the following equation (1).

γ=360−2n・Arccos((2h/D)・tanθ)) ・・・ (1)
γ:合計角度(°)の理論値
n:脚部の数(n≧3)
h:空状態のボトルの重心高さ(mm)
D:接地部の接地径(mm)
θ:転倒角(°)の設計値
γ = 360-2n · Arccos ((2h / D) · tan θ)) (1)
γ: theoretical value of total angle (°) n: number of legs (n ≧ 3)
h: Height of center of gravity of empty bottle (mm)
D: Grounding diameter of grounding part (mm)
θ: Design value of the tipping angle (°)

なお転倒角θは、水平方向に沿って延在する図示しない接地面にボトル10を載置して、このボトル10の縦凹条部17における周方向の中央部が下方を向くように接地面を徐々に傾けていくことでボトル10が転倒したときに、前記接地面が水平面に対してなす傾斜角度をいい、この転倒角θの設計値が11°以上であると、ボトル10の転倒を効果的に抑制することができる。   The falling angle θ is set so that the bottle 10 is placed on a grounding surface (not shown) extending along the horizontal direction, and the center portion in the circumferential direction of the longitudinal concave portion 17 of the bottle 10 faces downward. When the bottle 10 falls down by gradually tilting, the inclination angle that the ground contact surface makes with the horizontal plane is said. If the design value of the fall angle θ is 11 ° or more, the bottle 10 is overturned. It can be effectively suppressed.

ここで上記(1)式に基づいて、ボトル10の全高Lに対する接地部22の接地径Dの比(接地径D/全高L)が0.230となるボトル10において、脚部18の数nを5、空状態のボトル10の重心高さhを107.5mm、接地部22の接地径Dを49.45mm、転倒角θの設計値を11°とした場合における合計角度γの理論値を算出すると、約37°となる。すなわち、このようなボトル10において、合計角度γの実際の値を37°以上にすると、理論上はボトル10の転倒を抑制することができる。なお、上記空状態のボトル10における重心のボトル軸O方向の位置は、ボトル10の全高Lの1/2の高さ位置となっている。   Here, based on the above formula (1), the number n of the leg portions 18 in the bottle 10 in which the ratio of the ground contact diameter D of the ground contact portion 22 to the total height L of the bottle 10 (ground contact diameter D / total height L) is 0.230. 5 is the theoretical value of the total angle γ when the center of gravity height h of the empty bottle 10 is 107.5 mm, the grounding diameter D of the grounding part 22 is 49.45 mm, and the design value of the tipping angle θ is 11 °. When calculated, it is about 37 °. That is, in such a bottle 10, if the actual value of the total angle γ is 37 ° or more, the bottle 10 can be prevented from falling over in theory. Note that the position of the center of gravity of the empty bottle 10 in the direction of the bottle axis O is a half of the total height L of the bottle 10.

しかしながら、前記合計角度が60°未満である場合、各脚部18の脚幅Wが小さくなり過ぎ、これらの脚部18の賦形性を確保することが困難になるおそれがある。
また、前記合計角度が180°よりも大きい場合、各縦凹条部17の周方向に沿った大きさが小さくなり過ぎ、これらの縦凹条部17の賦形性を確保することが困難になるおそれがある。
However, when the total angle is less than 60 °, the leg width W of each leg 18 becomes too small, and it may be difficult to ensure the shapeability of these legs 18.
In addition, when the total angle is larger than 180 °, the size along the circumferential direction of each vertical groove 17 is too small, and it is difficult to ensure the shapeability of these vertical grooves 17. There is a risk.

以上より、前記合計角度が、37°よりも大きい60°以上で、かつ180°以下とすることで、当該ボトル10の転倒を抑制することができるとともに、当該ボトル10の賦形性を確保し易くすることができる。   From the above, by making the total angle 60 ° or more larger than 37 ° and 180 ° or less, the bottle 10 can be prevented from falling, and the shapeability of the bottle 10 can be secured. Can be made easier.

なお、本発明の技術的範囲は前記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。
例えば、前記実施形態では、縦凹条部17および脚部18はそれぞれ、5個ずつ形成されているものとしたが、3個ずつ以上形成されていればこれに限られない。
さらに前記実施形態では、縦凹条部17および脚部18はそれぞれ、奇数個ずつ形成されているものとしたが、偶数個ずつ形成されていてもよい。
The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above-described embodiment, five vertical concave portions 17 and leg portions 18 are formed, but the number is not limited to this as long as three or more are formed.
Furthermore, in the said embodiment, although the vertical concave strip part 17 and the leg part 18 were each formed in odd numbers, you may be formed in even numbers.

また前記実施形態では、胴部13が全長にわたって前記最大径部となっているものとしたが、これに限られず、例えば胴部の上端部または下端部が限定的に前記最大径部となっていてもよい。   Moreover, in the said embodiment, although the trunk | drum 13 shall be the said largest diameter part over the full length, it is not restricted to this, For example, the upper end part or lower end part of the trunk | drum is limited to the said largest diameter part. May be.

またボトル10を設計するに際し、例えば、まず脚部18の数n、ボトル10の重心高さhおよび接地部22の接地径Dを設定し、これらの数値を、上記(1)式に代入して合計角度γの理論値を算出し、この理論値に基づいて、合計角度γの実際の値を、60°以上180°以下の範囲内で、かつ理論値以上の値とする等してもよい。
なお、n=5、h=107.5(mm)、D=47.88(mm)、θ=11.0(°)とすると、上記(1)式では、γ=67.9(°)となる。
また、n=5、h=109(mm)、D=47.65(mm)、θ=11.0(°)とすると、上記(1)式では、γ=87.8(°)となる。
また、n=5、h=107.5(mm)、D=47.88(mm)、θ=11.58(°)とすると、上記(1)式では、γ=129.4(°)となる。
また、n=5、h=109(mm)、D=47.65(mm)、θ=11.41(°)とすると、上記(1)式では、γ=134.2(°)となる。
ここで合計角度γの実際の値を、上記(1)式により算出される合計角度γの理論値と同等にしたボトル10では、転倒角θの実際の値が、例えば製造上のばらつき(肉厚)等を起因とし、転倒角θの設計値と異なる場合があり、例えば転倒角θの設計値に比べて、実使用上影響がない程度小さくなる場合などがある。
In designing the bottle 10, for example, first, the number n of the leg portions 18, the center of gravity height h of the bottle 10, and the ground contact diameter D of the ground contact portion 22 are set, and these numerical values are substituted into the above equation (1). The theoretical value of the total angle γ is calculated, and based on this theoretical value, the actual value of the total angle γ is set to a value within the range of 60 ° to 180 ° and higher than the theoretical value. Good.
If n = 5, h = 107.5 (mm), D = 47.88 (mm), and θ = 11.0 (°), in the above equation (1), γ = 67.9 (°) It becomes.
Further, when n = 5, h = 109 (mm), D = 47.65 (mm), and θ = 11.0 (°), in the above equation (1), γ = 87.8 (°). .
Further, when n = 5, h = 107.5 (mm), D = 47.88 (mm), and θ = 11.58 (°), in the above equation (1), γ = 129.4 (°) It becomes.
Further, assuming that n = 5, h = 109 (mm), D = 47.65 (mm), and θ = 11.41 (°), in the above equation (1), γ = 13.4 (°). .
Here, in the bottle 10 in which the actual value of the total angle γ is equivalent to the theoretical value of the total angle γ calculated by the above formula (1), the actual value of the tipping angle θ is, for example, a manufacturing variation (meat The design value of the fall angle θ may be different from the design value of the fall angle θ. For example, it may be smaller than the design value of the fall angle θ so as not to affect the actual use.

その他、本発明の趣旨に逸脱しない範囲で、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、前記した変形例を適宜組み合わせてもよい。   In addition, it is possible to appropriately replace the constituent elements in the embodiment with known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

10 ボトル
11 口部
12 肩部
13 胴部
14 底部
15 中央壁部
16 連結周壁部
17 縦凹条部
18 脚部
22 接地部
D 接地径
L 全高
O ボトル軸
DESCRIPTION OF SYMBOLS 10 Bottle 11 Mouth part 12 Shoulder part 13 Body part 14 Bottom part 15 Central wall part 16 Connection surrounding wall part 17 Vertical concave part 18 Leg part 22 Grounding part D Grounding diameter L Total height O Bottle axis

Claims (1)

筒状の口部、肩部および胴部と、有底筒状の底部と、が合成樹脂材料で一体に形成され、
前記底部は、ボトル軸上に位置する中央壁部と、該中央壁部の外周縁と前記胴部とを連結する連結周壁部と、を備え、
前記連結周壁部には、周方向に間隔をあけて3つ以上の縦凹条部が形成され、
前記連結周壁部において周方向に隣り合う縦凹条部同士の間に位置する各部分には、前記中央壁部よりもボトル軸方向の外側に向けて突出する脚部が形成され、
該脚部には、周方向に延在する接地部が形成され、
複数の前記接地部は、前記底部をボトル軸方向の外側から見た底面視において、周方向の全長にわたって間欠的に配置され、
当該ボトルの全高に対する前記接地部の接地径(ただし、60mm、64.61mm、66.43mmを除く)の比が0.230以下とされたボトルであって、
前記底面視において、それぞれの前記接地部がなすボトル軸を中心とした中心角の合計角度は、60°以上180°以下であることを特徴とするボトル。
A cylindrical mouth portion, a shoulder portion and a trunk portion, and a bottomed cylindrical bottom portion are integrally formed of a synthetic resin material,
The bottom includes a central wall located on the bottle shaft, and a connecting peripheral wall connecting the outer peripheral edge of the central wall and the trunk.
In the connecting peripheral wall portion, three or more vertical concave strip portions are formed at intervals in the circumferential direction,
Each portion located between the longitudinal concave portions adjacent to each other in the circumferential direction in the connection peripheral wall portion is formed with a leg portion that protrudes outward in the bottle axial direction from the central wall portion,
A grounding portion extending in the circumferential direction is formed on the leg portion,
The plurality of grounding portions are intermittently arranged over the entire length in the circumferential direction in the bottom view when the bottom portion is viewed from the outside in the bottle axial direction.
The ratio of the ground contact diameter of the ground contact portion (excluding 60 mm, 64.61 mm, and 66.43 mm) to the total height of the bottle is 0.230 or less,
In the bottom view, the total angle of the central angles around the bottle axis formed by each of the grounding portions is 60 ° or more and 180 ° or less.
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