JP2018104065A - Bottle - Google Patents

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JP2018104065A
JP2018104065A JP2016254739A JP2016254739A JP2018104065A JP 2018104065 A JP2018104065 A JP 2018104065A JP 2016254739 A JP2016254739 A JP 2016254739A JP 2016254739 A JP2016254739 A JP 2016254739A JP 2018104065 A JP2018104065 A JP 2018104065A
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bottle
circumferential direction
shoulder
wall portion
inclined plane
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JP6886815B2 (en
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哲郎 宇佐美
Tetsuro Usami
哲郎 宇佐美
田中　敏正
Toshimasa Tanaka
敏正 田中
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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 provide a bottle having improved buckling strength in a bottle axis direction.SOLUTION: There is provided a bottle 10 in which a cylindrical mouth portion 11, a shoulder portion 12 and a body portion 13, and a bottomed cylindrical bottom portion 14 are formed integrally with each other by a synthetic resin material, where the bottom portion includes a central wall portion 15 positioned on a bottle axis O, and a connection peripheral wall portion 16 connecting the outer peripheral edge of the central wall portion and the body portion. Three vertical recessed portions 17 at intervals in a circumferential direction are formed on the connection peripheral wall portion, and leg portions 18 projecting toward the outside of the central wall portion in a bottle axis direction are formed on each portion positioned between the vertical recessed portions adjacent in the circumferential direction in the connection peripheral wall portion. A flat inclined plane 12a extending in the bottle axis direction along the shoulder portion is formed at a position equivalent to the vertical recessed portion in the circumferential direction, on the shoulder portion.SELECTED DRAWING: Figure 1

Description

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

従来から、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、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。このように、底部をいわゆるペタロイド形状に形成することで、ボトルの耐圧性を確保することができる。   Conventionally, 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. . 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. In the connecting peripheral wall portion, three or more vertical concave strip portions are formed at intervals in the circumferential direction, and in each portion located between the vertical concave strip portions adjacent in the circumferential direction in the connecting peripheral wall portion, The leg part which protrudes toward the outer side of a bottle axial direction rather than a center wall part is formed. Thus, the pressure resistance of a bottle is securable by forming a bottom part in what is called a petaloid shape.

特開２０１６−２０２４０号公報Japanese Patent Laid-Open No. 2006-20240

この種のボトルを軽量化（薄肉化）すると、内容物が充填される前の状態におけるボトルの剛性が低下して所望の座屈強度を得られず、製造後における段積み状態での保管や輸送時等におけるボトル軸方向の圧縮力によって、座屈変形が生じてしまうおそれがあった。   If this type of bottle is reduced in weight (thinned), the rigidity of the bottle in the state before the contents are filled is lowered and the desired buckling strength cannot be obtained. There is a risk that buckling deformation may occur due to the compressive force in the bottle axial direction during transportation or the like.

本発明はこのような事情を考慮してなされたもので、ボトル軸方向の座屈強度を向上させたボトルを提供することを目的とする。   The present invention has been made in consideration of such circumstances, and an object thereof is to provide a bottle with improved buckling strength in the bottle axial direction.

上記課題を解決するために、本発明のボトルは、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、前記肩部には、該肩部に沿ってボトル軸方向に延びる平坦な傾斜平面が、周方向において、前記縦凹条部と同等の位置に形成されていることを特徴とする。   In order to solve the above-described problem, the bottle of the present invention has a cylindrical mouth portion, a shoulder portion, and a trunk portion, and a bottomed cylindrical bottom portion that are integrally formed of a synthetic resin material, and the bottom portion is a bottle. A central wall located on the shaft, and a connecting peripheral wall connecting the outer peripheral edge of the central wall and the body, the connecting peripheral wall having three or more circumferentially spaced intervals Are formed, and each portion located between the longitudinal concave portions adjacent to each other in the circumferential direction in the connection peripheral wall portion protrudes outward in the bottle axial direction from the central wall portion. A leg portion is formed, and a flat inclined plane extending in the bottle axis direction along the shoulder portion is formed in the shoulder portion at a position equivalent to the longitudinal concave portion in the circumferential direction. And

本発明のボトルによれば、肩部に傾斜平面が形成されているため、肩部と胴部との境界部分の、ボトル軸方向における座屈強度が高められている。そしてこの傾斜平面は、底部に形成された縦凹条部と周方向において同等の位置に配置されている。この構成により、ボトル軸方向の圧縮力が加えられた際に応力が集中しやすい縦凹条部の真上に傾斜平面が位置することとなり、ボトルの座屈強度が低下してしまうのを防ぎ、ボトルの座屈強度を確保することが可能となる。   According to the bottle of the present invention, since the inclined plane is formed in the shoulder portion, the buckling strength in the bottle axial direction of the boundary portion between the shoulder portion and the trunk portion is increased. And this inclined plane is arrange | positioned in the equivalent position in the circumferential direction with the vertical groove part formed in the bottom part. With this configuration, the inclined flat surface is positioned directly above the vertical concave strip where stress tends to concentrate when a compressive force in the bottle axial direction is applied, preventing the bottle buckling strength from being reduced. The buckling strength of the bottle can be ensured.

ここで、前記傾斜平面の幅は、ボトル軸方向における前記傾斜平面の中央部から端部に向かうに従い、漸次小さくなっていてもよい。   Here, the width of the inclined plane may be gradually reduced from the center portion to the end portion of the inclined plane in the bottle axial direction.

この場合、より確実にボトル全体の座屈強度を確保することができる。   In this case, the buckling strength of the entire bottle can be ensured more reliably.

本発明によれば、ボトル軸方向の座屈強度を向上させたボトルを提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the bottle which improved the buckling strength of the bottle axial direction can be provided.

本実施形態に係るボトルの側面図である。It is a side view of the bottle which concerns on this embodiment. 比較例に係るボトルの側面図である。It is a side view of the bottle which concerns on a comparative example.

以下、本実施形態に係るボトルの構成を、図１を参照しながら説明する。なお、以下の説明に用いる各図面では、各部材を認識可能な大きさとするため縮尺を適宜変更している。
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や押出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やポリプロピレン等を採用してもよい。
このボトル１０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。 Hereinafter, the configuration of the bottle according to the present embodiment will be described with reference to FIG. In each drawing used in the following description, the scale is appropriately changed to make each member a recognizable size.
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 or extrusion blow molding. As the synthetic resin material, for example, polyethylene terephthalate or polypropylene may be employed.
The bottle 10 may be filled with contents that increase the bottle internal pressure 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.

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方向から見た平面視において、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 a bottle axis O, the mouth part 11 side along the bottle axis O direction is referred to as an upper side, and the bottom part 14 side is referred to as a lower side. Further, in a plan view viewed from the bottle axis O direction, a direction orthogonal 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、平面視で円形状に形成されている。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いる。胴部１３の外径は、肩部１２の下端部および底部１４の上端部における外径よりも小さい。このため、肩部１２と胴部１３との連結部、および底部１４と胴部１３との連結部にはそれぞれ、段差が形成されている。胴部１３にはラベルが巻かれる場合があり、胴部１３の上下両端部に形成された段差によって、ラベルのボトル軸Ｏ方向の位置ずれを防ぐことができる。   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 12 is formed in a circular shape in plan view. 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 continuous with the upper end portion of the trunk portion 13. The trunk portion 13 is formed in a cylindrical shape and has the same diameter over the entire length in the bottle axis O direction. The outer diameter of the trunk portion 13 is smaller than the outer diameters at the lower end portion of the shoulder portion 12 and the upper end portion of the bottom portion 14. For this reason, steps are formed in the connecting portion between the shoulder portion 12 and the trunk portion 13 and in the connecting portion between the bottom portion 14 and the trunk portion 13. A label may be wound around the body part 13, and the level difference formed at the upper and lower end parts of the body part 13 can prevent the positional deviation of the label in the bottle axis O direction.

図１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、ボトル軸Ｏと同軸に配置されている。中央壁部１５の表裏面はそれぞれ、ボトル軸Ｏ方向を向いている。
中央壁部１５の上面および下面は、平坦な形状に形成されている。なお、これに限られず、中央壁部１５の上面および下面は上方又は下方に向けて凸の球面状であってもよい。 As shown in FIG. 1, 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. .
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), and is disposed coaxially with the bottle axis O. The front and back surfaces of the central wall portion 15 each face the bottle axis O direction.
The upper surface and the lower surface of the central wall portion 15 are formed in a flat shape. However, the present invention is not limited thereto, and the upper surface and the lower surface of the central wall portion 15 may have a spherical shape that protrudes upward or downward.

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が形成されている。このように、ボトル１０の底部１４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、周方向に等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、周方向に等間隔をあけて配置されている。なお、縦凹条部１７および脚部１８はそれぞれ、偶数個ずつ形成されていてもよい。 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 portion is formed with a leg portion 18 projecting downward (outside in the bottle axial direction) from the central wall portion 15. Thus, the bottom part 14 of the bottle 10 is formed in what is called a 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 concave stripe portions 17 are formed in the same shape and size, and are arranged at equal intervals in the circumferential direction. Further, the plurality of leg portions 18 are formed in the same shape and the same size, and are arranged at equal intervals in the circumferential direction. In addition, each of the vertical concave stripe portion 17 and the leg portion 18 may be formed in an even number.

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、胴部１３から下側に向けて延びる外壁部２０と、内壁部１９の径方向における外端部および外壁部２０の下端部を接続する接地部２２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、ボトル軸Ｏに沿う縦断面視において、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 includes an inner wall portion 19 extending radially outward from the central wall portion 15, an outer wall portion 20 extending downward from the trunk portion 13, and an outer end portion in the radial direction of the inner wall portion 19. A pair of side walls 21 connected to the respective side end portions in the circumferential direction of the inner wall 19 and the outer wall 20 disposed at intervals in the circumferential direction; It has.
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 a longitudinal sectional view along the bottle axis O. 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、径方向を向いている。外壁部２０は、下側から上側に向かうに従って漸次径方向の外側に向けて延在している。外壁部２０において接地部２２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。
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. The outer wall portion 20 extends gradually outward in the radial direction from the lower side toward the upper side. A lower end portion connected to the ground contact portion 22 in the outer wall portion 20 is curved so as to form a curved shape protruding outward in the radial direction in the longitudinal sectional view.
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.

接地部２２は、脚部１８の下端に位置し、周方向に延在している。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に沿って延在している。
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。 The grounding portion 22 is located at the lower end of the leg portion 18 and extends in the circumferential direction. The plurality of grounding portions 22 are intermittently arranged over the entire length in the circumferential direction in the bottom view, and extend along the same virtual circle centered on the bottle axis O.
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.

上記したような、胴部１３の断面が円形であり、底部１４がペタロイド形状のボトル１０においては、ボトル軸Ｏ方向の圧縮力が加わった場合、胴部１３と底部１４との境界部のうち縦凹条部１７の真上に位置する部分、および、胴部１３と肩部１２との境界部のうち脚部１８の真上に位置する部分に、応力が集中する傾向がある。この応力の集中によって、ボトル１０の座屈強度が低下する懸念がある。   In the bottle 10 having a circular cross section of the barrel portion 13 and having a petaloid shape at the bottom portion 14 as described above, when a compressive force in the bottle axis O direction is applied, of the boundary portion between the barrel portion 13 and the bottom portion 14. There is a tendency for stress to concentrate on a portion located directly above the longitudinal concave stripe portion 17 and a portion located directly above the leg portion 18 in the boundary portion between the trunk portion 13 and the shoulder portion 12. There is a concern that the buckling strength of the bottle 10 is reduced due to the concentration of the stress.

ここで、本実施形態では、肩部１２に、この肩部１２に沿ってボトル軸Ｏ方向に延び、内面および外面が平坦な傾斜平面１２ａが形成されている。ボトル軸Ｏに沿う縦断面視で、傾斜平面１２ａは、上側に向かうに従ってボトル軸Ｏに漸次近づくように、ボトル軸Ｏに対して傾斜している。傾斜平面１２ａの幅は、ボトル軸Ｏ方向における傾斜平面１２ａの中央部から端部に向かうに従って漸次小さくなっている。傾斜平面１２ａは、この傾斜平面１２ａの法線方向から見て、楕円形状に形成されている。傾斜平面１２ａの上端部および下端部の位置は、周方向において同等の位置に位置している。   Here, in the present embodiment, an inclined flat surface 12a is formed on the shoulder portion 12 so as to extend in the bottle axis O direction along the shoulder portion 12 and has a flat inner surface and outer surface. In a longitudinal sectional view along the bottle axis O, the inclined plane 12a is inclined with respect to the bottle axis O so as to gradually approach the bottle axis O toward the upper side. The width of the inclined plane 12a is gradually reduced from the center to the end of the inclined plane 12a in the bottle axis O direction. The inclined plane 12a is formed in an elliptical shape when viewed from the normal direction of the inclined plane 12a. The positions of the upper end portion and the lower end portion of the inclined plane 12a are located at equivalent positions in the circumferential direction.

縦断面視で、肩部１２の内周面および外周面は、上側および径方向外側に向けて凸の曲面状に形成されている。傾斜平面１２ａは、肩部１２の曲面を、この曲面に沿うようにボトル１０の内側に向けて部分的にカットした形状に形成されている。なお、例えばボトル１０内に炭酸飲料が充填されて内圧が高まると、傾斜平面１２ａがボトル１０の径方向外側に膨らむように弾性変形するとともに、肩部１２のうち、周方向において隣接する傾斜平面１２ａ同士の間に位置する部分が、ボトル１０の径方向内側に弾性変形する。   In a longitudinal sectional view, the inner peripheral surface and the outer peripheral surface of the shoulder 12 are formed in a curved surface shape that is convex upward and radially outward. The inclined plane 12a is formed in a shape in which the curved surface of the shoulder 12 is partially cut toward the inside of the bottle 10 along the curved surface. For example, when a carbonated beverage is filled in the bottle 10 and the internal pressure is increased, the inclined plane 12a is elastically deformed so as to swell outward in the radial direction of the bottle 10, and among the shoulder portions 12, adjacent inclined planes in the circumferential direction. A portion located between 12 a is elastically deformed radially inward of the bottle 10.

傾斜平面１２ａは、周方向に等間隔をあけて配置されている。傾斜平面１２ａは、肩部１２に、底部１４に形成された縦凹条部１７の数と同数形成されている。各傾斜平面１２ａは、周方向において、縦凹条部１７と同等の位置に配置されている。   The inclined planes 12a are arranged at equal intervals in the circumferential direction. The number of the inclined flat surfaces 12a is the same as the number of the vertical concave stripe portions 17 formed on the bottom portion 14 on the shoulder portion 12. Each inclined plane 12a is arranged at a position equivalent to the vertical concave stripe portion 17 in the circumferential direction.

以上説明したように、本実施形態のボトル１０では、肩部１２に傾斜平面１２ａが形成されているため、肩部１２と胴部１３との境界部分の、ボトル軸Ｏ方向における座屈強度が高められている。そしてこの傾斜平面１２ａは、底部１４に形成された縦凹条部１７と周方向において同等の位置に配置されている。この構成により、ボトル軸Ｏ方向の圧縮力が加えられた際に応力が集中しやすい縦凹条部１７の真上に傾斜平面１２ａが位置することとなり、ボトル１０の座屈強度が低下してしまうのを防ぎ、ボトル１０の座屈強度を確保することが可能となる。   As described above, in the bottle 10 of the present embodiment, since the inclined plane 12a is formed on the shoulder portion 12, the buckling strength in the bottle axis O direction at the boundary portion between the shoulder portion 12 and the trunk portion 13 is high. Has been enhanced. And this inclined plane 12a is arrange | positioned in the equivalent position in the circumferential direction with the vertical groove part 17 formed in the bottom part 14. As shown in FIG. With this configuration, when the compressive force in the bottle axis O direction is applied, the inclined flat surface 12a is positioned directly above the vertical concave portion 17 where stress is likely to concentrate, and the buckling strength of the bottle 10 is reduced. The buckling strength of the bottle 10 can be secured.

さらに、傾斜平面１２ａの幅が、ボトル軸Ｏ方向における傾斜平面１２ａの中央部から端部に向かうに従って漸次小さくなっているため、より確実にボトル１０の座屈強度を確保することができる。   Furthermore, since the width of the inclined plane 12a gradually decreases from the central portion to the end of the inclined plane 12a in the bottle axis O direction, the buckling strength of the bottle 10 can be ensured more reliably.

（実施例）
一例では、図１に示すボトル１０のように、周方向において縦凹条部１７と同等の位置に傾斜平面１２ａを配置することで、このような傾斜平面１２ａを設けていないボトルと比較して、ボトル軸Ｏ方向の座屈強度を約７％向上させることができた。
これに対して、図２に示す比較例のボトル１００のように、周方向において脚部１８と同等の位置に傾斜平面１２ａを配置すると、このような傾斜平面１２ａを設けていないボトルと比較して、ボトル軸Ｏ方向の座屈強度が約６％低下した。
以上のことから、縦凹条部１７と傾斜平面１２ａとを周方向において同等の位置に配置することの優位性が確認された。 (Example)
In one example, as in the bottle 10 shown in FIG. 1, the inclined plane 12a is arranged at a position equivalent to the longitudinal concave strip portion 17 in the circumferential direction, and compared with a bottle not provided with such an inclined plane 12a. The buckling strength in the bottle axis O direction could be improved by about 7%.
On the other hand, when the inclined plane 12a is arranged at a position equivalent to the leg portion 18 in the circumferential direction as in the bottle 100 of the comparative example shown in FIG. 2, it is compared with a bottle not provided with such an inclined plane 12a. Thus, the buckling strength in the bottle axis O direction was reduced by about 6%.
From the above, the superiority of disposing the vertical concave stripe portion 17 and the inclined flat surface 12a at the same position in the circumferential direction was confirmed.

なお、本発明の技術的範囲は前記実施の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 embodiment, and various modifications can be made without departing from the spirit of the present invention.

例えば、本実施形態では肩部１２と胴部１３との接続部および底部１４と胴部１３との接続部に、それぞれ段差が形成されていたが、これに限られず、例えば肩部１２、胴部１３、底部１４が段差なく滑らかに連なっていてもよい。   For example, in the present embodiment, a step is formed at the connection portion between the shoulder portion 12 and the trunk portion 13 and at the connection portion between the bottom portion 14 and the trunk portion 13, but the present invention is not limited to this. The part 13 and the bottom part 14 may be connected smoothly without a step.

その他、本発明の趣旨を逸脱しない範囲で、上記した実施の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、上記した実施形態や変形例を適宜組み合わせてもよい。   In addition, the constituent elements in the above-described embodiment can be appropriately replaced with known constituent elements without departing from the gist of the present invention, and the above-described embodiments and modifications may be appropriately combined.

１０…ボトル １１…口部 １２…肩部 １２ａ…傾斜平面 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 Ｏ…ボトル軸   DESCRIPTION OF SYMBOLS 10 ... Bottle 11 ... Mouth part 12 ... Shoulder part 12a ... Inclined plane 13 ... Trunk part 14 ... Bottom part 15 ... Central wall part 16 ... Connection surrounding wall part 17 ... Longitudinal groove part 18 ... Leg part O ... Bottle axis

Claims (2)

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、
前記肩部には、該肩部に沿ってボトル軸方向に延びる平坦な傾斜平面が、周方向において、前記縦凹条部と同等の位置に形成されてい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,
The bottle characterized in that a flat inclined plane extending in the bottle axial direction along the shoulder is formed in the shoulder at a position equivalent to the longitudinal concave strip in the circumferential direction. 前記傾斜平面の幅は、ボトル軸方向における前記傾斜平面の中央部から端部に向かうに従い、漸次小さくなっていることを特徴とする、請求項１に記載のボトル。   2. The bottle according to claim 1, wherein the width of the inclined plane gradually decreases from a central portion to an end portion of the inclined plane in the bottle axial direction.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5026664Y1 (en) * 1969-03-25 1975-08-08
JP2001278235A (en) * 2000-03-30 2001-10-10 Yoshino Kogyosho Co Ltd Plastic bottle
JP2004123103A (en) * 2002-09-30 2004-04-22 Yoshino Kogyosho Co Ltd Bottom structure of synthetic resin bottle container
JP2008030835A (en) * 2006-07-31 2008-02-14 Toyo Seikan Kaisha Ltd Synthetic resin container
JP2008030836A (en) * 2006-07-31 2008-02-14 Toyo Seikan Kaisha Ltd Synthetic resin container

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5026664Y1 (en) * 1969-03-25 1975-08-08
JP2001278235A (en) * 2000-03-30 2001-10-10 Yoshino Kogyosho Co Ltd Plastic bottle
JP2004123103A (en) * 2002-09-30 2004-04-22 Yoshino Kogyosho Co Ltd Bottom structure of synthetic resin bottle container
JP2008030835A (en) * 2006-07-31 2008-02-14 Toyo Seikan Kaisha Ltd Synthetic resin container
JP2008030836A (en) * 2006-07-31 2008-02-14 Toyo Seikan Kaisha Ltd Synthetic resin container

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