JP5645604B2 - Bottle - Google Patents

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JP5645604B2
JP5645604B2 JP2010240948A JP2010240948A JP5645604B2 JP 5645604 B2 JP5645604 B2 JP 5645604B2 JP 2010240948 A JP2010240948 A JP 2010240948A JP 2010240948 A JP2010240948 A JP 2010240948A JP 5645604 B2 JP5645604 B2 JP 5645604B2
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bottle
wall portion
peripheral wall
radial direction
movable wall
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JP2012091830A (en
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吾郎 栗原
吾郎 栗原
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Yoshino Kogyosho Co Ltd
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Yoshino Kogyosho Co Ltd
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Description

本発明は、ボトルに関するものである。   The present invention relates to 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、底部の底壁部が、外周縁部に位置する接地部と、該接地部にボトル径方向の内側から連なり上方に向けて延びる立ち上がり周壁部と、該立ち上がり周壁部の上端部からボトル径方向の内側に向けて突出する可動壁部と、該可動壁部のボトル径方向の内端部から上方に向けて延びる陥没周壁部と、を備え、可動壁部が陥没周壁部を上方に向けて移動させるように、立ち上がり周壁部との接続部分を中心に回動することにより、ボトル内の減圧を吸収する構成が知られている。   Conventionally, as a bottle formed into a bottomed cylindrical shape with a synthetic resin material, for example, as shown in Patent Document 1 below, the bottom wall portion of the bottom portion is connected to a grounding portion located on the outer peripheral edge portion, and the grounding portion. A rising peripheral wall portion extending from the inside in the bottle radial direction and extending upward; a movable wall portion protruding from the upper end portion of the rising peripheral wall portion toward the inside in the bottle radial direction; and an inner portion of the movable wall portion in the bottle radial direction. A bottle by rotating around a connecting portion with the rising peripheral wall so that the movable wall moves the depressed peripheral wall upward. A configuration that absorbs the reduced pressure inside is known.

特開２０１０−１２６１８４号公報JP 2010-126184 A

しかしながら、前記従来のボトルでは、ボトル内の減圧吸収性能を向上させることに対して改善の余地があった。   However, the conventional bottle has room for improvement with respect to improving the vacuum absorption performance in the bottle.

そこで、本発明はこのような事情を考慮してなされたもので、その目的は、ボトル内の減圧吸収性能を向上させることができるボトルを提供することである。   Therefore, the present invention has been made in consideration of such circumstances, and an object of the present invention is to provide a bottle capable of improving the vacuum absorption performance in the bottle.

上記の目的を達成するために、この本発明は以下の手段を提供している。
（１）本発明に係るボトルは、合成樹脂材料で有底筒状に形成されたボトルであって、底部の底壁部が、外周縁部に位置する接地部と、該接地部にボトル径方向の内側から連なり上方に向けて延びる立ち上がり周壁部と、該立ち上がり周壁部の上端部からボトル径方向の内側に向けて突出する環状の可動壁部と、該可動壁部のボトル径方向の内端部から上方に向けて延びる陥没周壁部と、を備え、前記立ち上がり周壁部の上端部と、前記可動壁部のボトル径方向の外端部と、の接続部分には、可動壁部の表面形状に倣ってボトル径方向の外側に延長させた仮想線に対して上方に窪む環状凹溝が形成され、前記可動壁部が、前記環状凹溝を介して前記立ち上がり周壁部に接続される外端部から前記陥没周壁部に接続される内端部に向かうに従い漸次下方に向けて延在すると共に、前記陥没周壁部を上方に向けて移動させるように、前記環状凹溝を中心に回動自在に配設されていることを特徴とする。


In order to achieve the above object, the present invention provides the following means.
(1) A bottle according to the present invention is a bottle formed of a synthetic resin material in a bottomed cylindrical shape, wherein a bottom wall portion of the bottom portion is positioned on an outer peripheral edge portion, and a bottle diameter is provided on the grounding portion. A rising peripheral wall portion extending from the inner side in the direction and extending upward; an annular movable wall portion projecting inward from the upper end portion of the rising peripheral wall portion toward the inner side in the bottle radial direction; A recessed peripheral wall portion extending upward from the end portion, and a surface of the movable wall portion at a connection portion between the upper end portion of the rising peripheral wall portion and the outer end portion of the movable wall portion in the bottle radial direction. An annular groove that is recessed upward is formed with respect to an imaginary line that extends outward in the bottle radial direction following the shape, and the movable wall portion is connected to the rising peripheral wall portion via the annular groove. From the outer end toward the inner end connected to the depressed peripheral wall While extending toward the next downward, said to cause the depression peripheral wall part is moved upward, characterized in that it is rotatably disposed around the annular groove.


本発明に係るボトルによれば、ボトル内の減圧時、可動壁部の回動によって陥没周壁部が上方に移動することで減圧を吸収することができる。特に、立ち上がり周壁部と可動壁部との接続部分には上記仮想線に対して上方に窪む環状凹溝が形成され、この環状凹溝を中心に可動壁部を回動させるので、可動壁部の外端部に柔軟性を具備させることで高いヒンジ効果を期待でき、可動壁部をボトル内の内圧変化に感度良く追従させながら柔軟に変形させることができる。従って、減圧吸収性能を向上させることができる。   According to the bottle of the present invention, when the inside of the bottle is depressurized, the depressed peripheral wall portion moves upward by the rotation of the movable wall portion, so that the depressurization can be absorbed. In particular, an annular concave groove that is recessed upward with respect to the imaginary line is formed at the connecting portion between the rising peripheral wall portion and the movable wall portion, and the movable wall portion is rotated around the annular concave groove. By providing flexibility at the outer end of the part, a high hinge effect can be expected, and the movable wall part can be flexibly deformed while following the internal pressure change in the bottle with high sensitivity. Therefore, the reduced pressure absorption performance can be improved.

本発明に係るボトルによれば、ボトル内の減圧吸収性能を向上させることができる。   According to the bottle according to the present invention, the reduced-pressure absorption performance in the bottle can be improved.

本発明の実施形態におけるボトルの側面図である。It is a side view of the bottle in the embodiment of the present 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. 図２に示すＡ−Ａ線に沿ったボトルの断面図である。It is sectional drawing of the bottle along the AA line shown in FIG.

以下、図面を参照し、本発明の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に示すように、口部１１、肩部１２、胴部１３及び底部１４を備え、これらがそれぞれの中心軸線を共通軸上に位置した状態でこの順に連設された概略構成とされている。 Hereinafter, bottles according to embodiments of the present invention will be described with reference to the drawings.
The bottle 1 which concerns on this embodiment is provided with the mouth part 11, the shoulder part 12, the trunk | drum 13, and the bottom part 14 as shown in FIGS. 1-3, and these have located each central axis on the common axis The schematic configuration is arranged in this order.

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側を下側という。また、ボトル軸Ｏに直交する方向をボトル径方向といい、ボトル軸Ｏを中心に周回する方向をボトル周方向という。
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。また、口部１１には、図示されないキャップが螺着される。更に、口部１１、肩部１２、胴部１３及び底部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されている。 Hereinafter, the common axis is referred to as a bottle axis O, and the mouth 11 side is referred to as the upper side and the bottom 14 side is referred to as the lower side along the bottle axis O direction. A direction perpendicular to the bottle axis O is referred to as a bottle radial direction, and a direction around the bottle axis O is referred to as a bottle 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 screwed into the mouth portion 11. Further, the mouth portion 11, the shoulder portion 12, the trunk portion 13, and the bottom portion 14 each have a circular cross-sectional view shape orthogonal to the bottle axis O.

肩部１２と胴部１３との接続部分には、第１環状凹溝１６が全周に亘って連続して形成されている。
胴部１３は筒状に形成されていると共に、ボトル軸Ｏ方向の両端部同士の間がこれら両端部より小径に形成されている。この胴部１３には、ボトル軸Ｏ方向に間隔を開けて複数の第２環状凹溝１５が形成されている。図示の例では、ボトル軸Ｏ方向に等間隔を開けて第２環状凹溝１５が４つ形成されている。各第２環状凹溝１５は、胴部１３の全周に亘って連続して形成された溝部とされている。 A first annular groove 16 is continuously formed over the entire circumference at the connecting portion between the shoulder portion 12 and the body portion 13.
The body portion 13 is formed in a cylindrical shape, and a portion between both end portions in the bottle axis O direction is formed with a smaller diameter than these both end portions. A plurality of second annular grooves 15 are formed in the body portion 13 at intervals in the bottle axis O direction. In the illustrated example, four second annular grooves 15 are formed at equal intervals in the bottle axis O direction. Each second annular groove 15 is a groove formed continuously over the entire circumference of the body portion 13.

胴部１３と底部１４との接続部分には、第３環状凹溝２０が全周に亘って連続して形成されている。
底部１４は、上端開口部が胴部１３の下端開口部に接続されたヒール部１７と、ヒール部１７の下端開口部を閉塞し、且つ外周縁部が接地部１８とされた底壁部１９と、を備えるカップ状に形成されている。 A third annular groove 20 is continuously formed over the entire circumference at the connection portion between the body portion 13 and the bottom portion 14.
The bottom portion 14 has a heel portion 17 whose upper end opening is connected to the lower end opening portion of the body portion 13, and a bottom wall portion 19 that closes the lower end opening portion of the heel portion 17 and whose outer peripheral edge portion is a grounding portion 18. Are formed in a cup shape.

ヒール部１７のうち、上記接地部１８にボトル径方向の外側から連なるヒール下端部２７は、該ヒール下端部２７に上方から連なる上ヒール部２８より小径に形成されている。なお、この上ヒール部２８は、胴部１３のボトル軸Ｏ方向の両端部と共にボトル１の最大外径部とされている。   Of the heel portion 17, a heel lower end portion 27 connected to the ground contact portion 18 from the outside in the bottle radial direction is formed to have a smaller diameter than an upper heel portion 28 connected to the heel lower end portion 27 from above. The upper heel portion 28 is the maximum outer diameter portion of the bottle 1 together with both end portions of the body portion 13 in the bottle axis O direction.

また、ヒール下端部２７と上ヒール部２８との連結部分２９は、上方から下方に向かうに従い漸次縮径されており、これによりヒール下端部２７が上ヒール部２８より小径とされている。また、上ヒール部２８には、第３環状凹溝２０と略同じ深さの第４環状凹溝３１が全周に亘って連続して形成されている。   Further, the connecting portion 29 between the heel lower end portion 27 and the upper heel portion 28 is gradually reduced in diameter from the upper side toward the lower side, whereby the heel lower end portion 27 has a smaller diameter than the upper heel portion 28. Further, a fourth annular groove 31 having substantially the same depth as the third annular groove 20 is continuously formed on the upper heel portion 28 over the entire circumference.

底壁部１９は、図３に示すように、接地部１８にボトル径方向の内側から連なり上方に向けて延びる立ち上がり周壁部２１と、立ち上がり周壁部２１の上端部からボトル径方向の内側に向けて突出する環状の可動壁部２２と、可動壁部２２のボトル径方向の内端部から上方に向けて延びる陥没周壁部２３と、を備えている。   As shown in FIG. 3, the bottom wall portion 19 is connected to the ground contact portion 18 from the inside in the bottle radial direction and extends upward, and extends upward from the upper end portion of the rising peripheral wall portion 21 toward the inside in the bottle radial direction. And an annular movable wall portion 22 that protrudes upward, and a depressed peripheral wall portion 23 that extends upward from the inner end portion of the movable wall portion 22 in the bottle radial direction.

立ち上がり周壁部２１は、下方から上方に向かうに従い漸次縮径している。
可動壁部２２は、下方に向けて突の曲面状に形成されると共に、ボトル径方向の外側から内側に向かうに従い漸次下方に向けて延在している。また、この可動壁部２２のボトル径方向の外端部と、立ち上がり周壁部２１の上端部と、の接続部分には、上方に向けて突に湾曲した環状凹溝２５が形成されている。そして、可動壁部２２は、陥没周壁部２３を上方に向けて移動させるように、この環状凹溝２５を中心に回動自在とされている。
上記環状凹溝２５は、可動壁部２２の表面形状に倣ってボトル径方向の外側に延長させた仮想線Ｌよりも上方に位置し、該位置で全周に亘って連続的に上方に窪むように形成されている。
なお、可動壁部２２が複数の曲線や直線、またはそれらの組合せで構成されている場合には、前記環状凹溝２５に隣接する部分の表面形状に倣って延長された線を上記仮想線Ｌとする。 The rising peripheral wall portion 21 is gradually reduced in diameter from the lower side toward the upper side.
The movable wall portion 22 is formed in a curved shape protruding downward, and gradually extends downward from the outside in the bottle radial direction toward the inside. In addition, an annular groove 25 that is curved to protrude upward is formed at a connection portion between the outer end portion of the movable wall portion 22 in the bottle radial direction and the upper end portion of the rising peripheral wall portion 21. The movable wall portion 22 is rotatable about the annular groove 25 so that the depressed peripheral wall portion 23 is moved upward.
The annular groove 25 is located above an imaginary line L that extends outward in the bottle radial direction following the surface shape of the movable wall portion 22, and is continuously recessed upward along the entire circumference at this position. It is formed in such a way.
When the movable wall portion 22 is configured by a plurality of curves, straight lines, or a combination thereof, a line extended following the surface shape of the portion adjacent to the annular groove 25 is represented by the virtual line L. And

また、可動壁部２２には、複数のリブ４０がボトル軸Ｏを中心に放射状に配設されている。即ち、各リブ４０はボトル周方向に沿って等間隔に配設されている。
なお、図示の例では、リブ４０は上方に向けて曲面状に窪んだ複数の凹部４０ａがボトル径方向に沿って断続的に、且つ直線状に延在することで構成されている。これにより、リブ４０は、ボトル径方向に沿う縦断面視形状が波形状に形成されている。 Further, a plurality of ribs 40 are radially arranged around the bottle axis O on the movable wall portion 22. That is, the ribs 40 are arranged at equal intervals along the bottle circumferential direction.
In the illustrated example, the rib 40 is configured by a plurality of concave portions 40a that are recessed in a curved shape upward and intermittently and linearly extend along the bottle radial direction. Thereby, as for the rib 40, the longitudinal cross-sectional view shape along a bottle radial direction is formed in the waveform.

各凹部４０ａは、それぞれ同形同大に形成されていると共にボトル径方向に沿って等間隔に配置されている。そして、複数のリブ４０各々において、複数の凹部４０ａが配設されているボトル径方向に沿う各位置は同じになっている。
なお、各リブ４０において、複数の凹部４０ａのうち、最もボトル径方向の外側に位置する凹部４０ａが環状凹溝２５にボトル径方向の内側から近接し、最もボトル径方向の内側に位置する凹部４０ａが陥没周壁部２３にボトル径方向の外側から近接している。 The respective recesses 40a are formed in the same shape and size, and are arranged at equal intervals along the bottle radial direction. And in each of the some rib 40, each position along the bottle radial direction in which the some recessed part 40a is arrange | positioned is the same.
In each rib 40, among the plurality of concave portions 40a, the concave portion 40a that is located on the outermost side in the bottle radial direction is adjacent to the annular concave groove 25 from the inner side in the bottle radial direction, and the concave portion that is located on the innermost side in the bottle radial direction. 40a is approaching the depressed peripheral wall portion 23 from the outside in the bottle radial direction.

陥没周壁部２３は、ボトル軸Ｏと同軸に配設されると共に、上方から下方に向かうに従い漸次拡径しながら多段に形成されている。陥没周壁部２３の上端部には、ボトル軸Ｏと同軸に配置された円板状の頂壁２４が接続されており、陥没周壁部２３及び頂壁２４の全体で有頂筒状をなしている。   The depressed peripheral wall portion 23 is arranged coaxially with the bottle axis O, and is formed in multiple stages while gradually increasing in diameter from the upper side to the lower side. A disc-shaped top wall 24 disposed coaxially with the bottle axis O is connected to the upper end portion of the depressed peripheral wall portion 23, and the entire depressed peripheral wall portion 23 and the top wall 24 form a top tube shape. Yes.

本実施形態の陥没周壁部２３は、可動壁部２２のボトル径方向の内端部から上方に向かうに従い漸次縮径された下筒部２３ａと、上端部が上記頂壁２４の外周縁部に連設され、下方に向かうに従い漸次拡径されると共に下方に向けて突の曲面状に形成された上筒部２３ｂと、これら両筒部２３ａ、２３ｂを連結する段部２３ｃと、を備えており、２段筒状に形成されている。   The depressed peripheral wall portion 23 of the present embodiment includes a lower cylindrical portion 23a that is gradually reduced in diameter from the inner end portion of the movable wall portion 22 in the bottle radial direction, and an upper end portion at the outer peripheral edge portion of the top wall 24. The upper cylinder part 23b which was continuously provided, was gradually diameter-expanded as it went below, and was formed in the curved surface shape which protruded below, and the step part 23c which connects both these cylinder parts 23a and 23b is provided. It is formed in a two-stage cylindrical shape.

下筒部２３ａは、横断面視円形状に形成され、可動壁部２２のボトル径方向の内端部に下方に向けて突の曲面部２６を介して連結されている。
上筒部２３ｂには、ボトル径方向の内側に向けて張り出す張出部２３ｄが形成されている。この張出部２３ｄは、上筒部２３ｂの上端部を除くボトル軸Ｏ方向のほぼ全長に亘って形成されており、図２に示すようにボトル周方向に複数連ねられて形成されている。
なお図示の例では、ボトル周方向に隣り合う張出部２３ｄ同士は、ボトル周方向に間隔を開けて配置されている。 The lower cylinder portion 23a is formed in a circular shape in cross section, and is connected to the inner end portion of the movable wall portion 22 in the bottle radial direction via a curved surface portion 26 protruding downward.
The upper tube portion 23b is formed with an overhang portion 23d that protrudes toward the inside in the bottle radial direction. The overhang portion 23d is formed over substantially the entire length in the bottle axis O direction excluding the upper end portion of the upper tube portion 23b, and a plurality of the overhang portions 23d are formed in the bottle circumferential direction as shown in FIG.
In the illustrated example, the overhang portions 23d adjacent to each other in the bottle circumferential direction are arranged with an interval in the bottle circumferential direction.

そして、上筒部２３ｂの横断面視形状は、張出部２３ｄが形成されることにより、下方から上方に向かうに従い多角形状から円形状に変形しており、上筒部２３ｂの上端部における横断面視形状は円形状となっている。上筒部２３ｂのうち、横断面視形状が多角形状とされた部分では、張出部２３ｄが多角形状の辺部とされ、ボトル周方向で隣り合う張出部２３ｄ同士の間に位置する間部分２３ｅが、多角形状の角部となっている。
なお、図示の例では、多角形状が略正三角形状の場合を例に挙げているが、この場合に限定されるものではない。 And the cross-sectional view shape of the upper cylinder part 23b is deform | transforming from the polygonal shape to the circular shape as it goes upwards from the downward direction by forming the overhang | projection part 23d, The crossing in the upper end part of the upper cylinder part 23b The shape in plan view is a circular shape. In the portion of the upper tube portion 23b where the cross-sectional view shape is a polygonal shape, the overhanging portion 23d is a polygonal side portion and is located between the overhanging portions 23d adjacent in the bottle circumferential direction. The portion 23e is a polygonal corner.
In the example shown in the figure, the case where the polygonal shape is a substantially equilateral triangle is described as an example, but the present invention is not limited to this case.

このように構成されたボトル１内が減圧すると、可動壁部２２が上方に向かって回動することで、該可動壁部２２は陥没周壁部２３を上方に向けて持ち上げるように移動する。即ち、減圧時にボトル１の底壁部１９を積極的に変形させることで、ボトル１の内圧変化（減圧）を吸収することができる。
特に、立ち上がり周壁部２１と可動壁部２２との接続部分には上記仮想線Ｌに対して上方に窪む環状凹溝２５が形成され、この環状凹溝２５を中心に可動壁部２２を回動させるので、可動壁部２２の外端部に柔軟性を具備させて高いヒンジ効果を期待でき、可動壁部２２をボトル１内の内圧変化に感度良く追従させながら柔軟に変形させることができる。従って、ボトル１内の減圧吸収性能を向上させることができる。 When the inside of the bottle 1 configured as described above is depressurized, the movable wall portion 22 is rotated upward so that the movable wall portion 22 moves so as to lift the depressed peripheral wall portion 23 upward. That is, the inner wall pressure change (decompression) of the bottle 1 can be absorbed by positively deforming the bottom wall portion 19 of the bottle 1 during decompression.
In particular, an annular groove 25 that is recessed upward with respect to the imaginary line L is formed at the connecting portion between the rising peripheral wall portion 21 and the movable wall portion 22, and the movable wall portion 22 is rotated around the annular groove 25. Since the movable wall portion 22 is moved, flexibility can be expected at the outer end portion of the movable wall portion 22 and a high hinge effect can be expected, and the movable wall portion 22 can be flexibly deformed while following the internal pressure change in the bottle 1 with high sensitivity. . Therefore, the vacuum absorption performance in the bottle 1 can be improved.

なお、底壁部１９の可動壁部２２に複数のリブ４０が形成されているので可動壁部２２の表面積を増加させて受圧面積を増すことができ、可動壁部２２をボトル１の内圧変化に速やかに対応して変形させることができる。   In addition, since the several rib 40 is formed in the movable wall part 22 of the bottom wall part 19, the surface area of the movable wall part 22 can be increased and a pressure receiving area can be increased, and the internal pressure change of the bottle 1 is made into the movable wall part 22. It can be deformed in response to the prompt.

なお、本発明の技術範囲は、上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。   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、上記実施形態ではリブ４０を放射状に断続的に延在させたが、これに限らず、連続的に延在させても良いし、湾曲して延在させても良い。また、凹部４０ａの形状や大きさは、適宜設計変更が可能である。
また、立ち上がり周壁部２１は、例えばボトル軸Ｏ方向に沿って平行に延在させる等、適宜変更しても良い。また、可動壁部２２は、例えばボトル径方向に沿って平行に突出させたり、上方に傾斜させたり等、適宜変更しても良い。さらにまた、可動壁部２２は、例えば平面状若しくは上方に向けて窪む凹曲面状に形成する等、適宜変更しても良い。 For example, in the above-described embodiment, the ribs 40 are intermittently extended radially. However, the present invention is not limited to this, and the ribs 40 may be continuously extended or may be curvedly extended. In addition, the shape and size of the recess 40a can be appropriately changed.
The rising peripheral wall portion 21 may be appropriately changed, for example, extending in parallel along the bottle axis O direction. Further, the movable wall portion 22 may be changed as appropriate, for example, by projecting in parallel along the bottle radial direction, or by tilting upward. Furthermore, the movable wall portion 22 may be appropriately changed, for example, formed in a planar shape or a concave curved shape that is recessed upward.

また、上記実施形態では、上筒部２３ｂを下方に向けて突の曲面状に形成したが、この形状に限られるものではない。
また、上記実施形態では、ボトル周方向に隣り合う張出部２３ｄ同士がボトル周方向に間隔を開けて配置されているものとしたが、これに限られるものではなく、例えば張出部２３ｄ同士がボトル周方向に間隔を開けずに配置され、互いに直接連結されていても良い。この場合、上筒部２３ｂのうち、張出部２３ｄが配設された部分における横断面視形状が円形状となっていても良く、上筒部２３ｂの横断面視形状がボトル軸Ｏ方向の全長に亘って円形状となっていても良い。
また、張出部２３ｄは必須ではなく具備しなくとも良い。更に、陥没周壁部２３は、２段筒状に形成されているものとしたが、３段以上の筒状に形成されていても、多段状に形成されていなくても良い。 Moreover, in the said embodiment, although the upper cylinder part 23b was formed in the curved surface shape which protruded below, it is not restricted to this shape.
Moreover, in the said embodiment, although the overhang | projection parts 23d adjacent to the bottle circumferential direction shall be arrange | positioned at intervals in the bottle circumferential direction, it is not restricted to this, For example, overhang parts 23d May be arranged in the peripheral direction of the bottle without being spaced apart and directly connected to each other. In this case, the cross-sectional view shape of the portion of the upper tube portion 23b where the overhang portion 23d is disposed may be circular, and the cross-sectional view shape of the upper tube portion 23b is in the bottle axis O direction. It may be circular over the entire length.
The overhang 23d is not essential and may not be provided. Furthermore, although the depressed peripheral wall portion 23 is formed in a two-stage cylinder shape, it may be formed in a three-stage or more cylinder shape or may not be formed in a multistage shape.

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、適宜変更しても良い。更に、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良い。なお、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。   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 a single layer structure, and 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, or a layer made of a resin material having an oxygen absorption property.

また、上記実施形態では、肩部１２、胴部１３及び底部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、多角形状にする等適宜変更しても良い。   Moreover, in the said embodiment, although the cross-sectional view shape orthogonal to each bottle axis | shaft O of the shoulder part 12, the trunk | drum 13, and the bottom part 14 was made into circular shape, it does not restrict to this, for example, changes suitably, such as polygonal shape You may do it.

Ｌ…仮想線
Ｏ…ボトル軸
１…ボトル
１３…胴部
１４…底部
１８…接地部
１９…底部の底壁部
２１…立ち上がり周壁部
２２…可動壁部
２３…陥没周壁部
２５…環状凹溝 L ... Virtual line O ... Bottle shaft 1 ... Bottle 13 ... Body part 14 ... Bottom part 18 ... Grounding part 19 ... Bottom wall part 21 ... Rising peripheral wall part 22 ... Movable wall part 23 ... Sinking peripheral wall part 25 ... Annular groove

Claims (1)

合成樹脂材料で有底筒状に形成されたボトルであって、
底部の底壁部は、
外周縁部に位置する接地部と、
該接地部にボトル径方向の内側から連なり上方に向けて延びる立ち上がり周壁部と、
該立ち上がり周壁部の上端部からボトル径方向の内側に向けて突出する環状の可動壁部と、
該可動壁部のボトル径方向の内端部から上方に向けて延びる陥没周壁部と、を備え、
前記立ち上がり周壁部の上端部と、前記可動壁部のボトル径方向の外端部と、の接続部分には、可動壁部の表面形状に倣ってボトル径方向の外側に延長させた仮想線に対して上方に窪む環状凹溝が形成され、
前記可動壁部は、前記環状凹溝を介して前記立ち上がり周壁部に接続される外端部から前記陥没周壁部に接続される内端部に向かうに従い漸次下方に向けて延在すると共に、前記陥没周壁部を上方に向けて移動させるように、前記環状凹溝を中心に回動自在に配設されていることを特徴とするボトル。 A bottle formed of a synthetic resin material in a bottomed cylindrical shape,
The bottom wall of the bottom
A grounding portion located at the outer periphery,
A rising peripheral wall portion extending from the inside in the bottle radial direction to the grounding portion and extending upward;
An annular movable wall portion projecting inward from the upper end portion of the rising peripheral wall portion in the bottle radial direction;
A depressed peripheral wall portion extending upward from an inner end portion in the bottle radial direction of the movable wall portion,
A connecting portion between the upper end portion of the rising peripheral wall portion and the outer end portion in the bottle radial direction of the movable wall portion is an imaginary line that extends outward in the bottle radial direction according to the surface shape of the movable wall portion. An annular groove that is recessed upward is formed,
The movable wall portion extends gradually downward from the outer end portion connected to the rising peripheral wall portion via the annular concave groove toward the inner end portion connected to the depressed peripheral wall portion, and A bottle characterized in that the bottle is rotatably arranged around the annular concave groove so as to move the depressed peripheral wall portion upward.
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