JP6151881B2

JP6151881B2 - Blow bottle

Info

Publication number: JP6151881B2
Application number: JP2011188613A
Authority: JP
Inventors: 忠和中山
Original assignee: Yoshino Kogyosho Co Ltd
Current assignee: Yoshino Kogyosho Co Ltd
Priority date: 2011-08-31
Filing date: 2011-08-31
Publication date: 2017-06-21
Anticipated expiration: 2031-08-31
Also published as: JP2013049468A

Description

本発明は、ブローボトルに関するものである。 The present invention relates to a blow 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ブロー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 thereof is to provide a blow bottle capable of improving the reduced pressure absorption performance in the bottle.

上記の目的を達成するために、この発明は以下の手段を提供している。
（１）本発明に係るブローボトルは、ポリエチレンテレフタレートで有底筒状に形成されたブローボトルであって、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、該可動壁部にボトル径方向の内側から連なり上方に向けて延びる陥没周壁部と、を備え、前記可動壁部は、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外端部を中心に回動自在に配設され、前記接地部から前記可動壁部の最下端部までの高さは、前記接地部から前記可動壁部の前記外端部までの高さの３５％以上６５％以下とされるとともに３ｍｍ以上とされ、前記接地部の直径が８５ｍｍ以下とされ、８０℃以上の内容物が充填されて用いられ、前記陥没周壁部の上端部には頂壁が接続されており、前記陥没周壁部は、前記可動壁部のボトル径方向の内端部から上方に向かうに従い漸次、縮径された下筒部と、前記頂壁の外周縁部から下方に向かうに従い漸次、拡径されるとともに下方に向けて突の曲面状に形成された上筒部と、これらの両筒部を連結する段部と、を備え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) blow bottle according to the present invention is a blow-molded bottle formed in a bottomed cylindrical shape with polyethylene terephthalate, a bottom wall portion of the bottom, and a grounding part positioned at the outer peripheral edge portion, bottle grounding portion A rising peripheral wall portion extending from the inner side in the radial 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, and the movable wall portion in the bottle radial direction. A depressed peripheral wall portion that extends from the inside and extends upward, and the movable wall portion gradually lowers from an outer end portion connected to the rising peripheral wall portion toward an inner end portion connected to the depressed peripheral wall portion. And is arranged to be rotatable about the outer end so as to move the depressed peripheral wall portion upward, and from the grounding portion to the lowermost end portion of the movable wall portion. The height is the grounding part The height to the outer end of the movable wall portion is 35% to 65% and 3 mm or more, the diameter of the grounding portion is 85 mm or less, and the content of 80 ° C. or more is filled. A top wall is connected to the upper end portion of the depressed peripheral wall portion, and the depressed peripheral wall portion is gradually lowered in diameter from the inner end portion in the bottle radial direction of the movable wall portion toward the upper side. A cylindrical portion, an upper cylindrical portion that is gradually enlarged in diameter as it goes downward from the outer peripheral edge portion of the top wall, and is formed in a curved shape that protrudes downward, and a step portion that connects both the cylindrical portions And.

本発明に係るブローボトルによれば、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、可動壁部は外端部から内端部に向かうに従い漸次下方に延在しているうえ、接地部から可動壁部の最下端部までの高さが接地部から外端部までの高さの６５％以下とされて外端部と最下端部との高低差が大きく確保されているので、内容物の充填時に該可動壁部を下方に向けて回動させ易い。そのため、ボトル内の容積を増大させて充填直後の減圧吸収容量を高めることができ、これにより減圧吸収性能を向上させることができる。
また、接地部から前記最下端部までの高さが接地部から外端部までの高さの３５％以上とされて、前記最下端部と接地部との距離が十分に確保されているので、内容物の充填に伴って可動壁部が下方に回動した際、この最下端部が接地部よりも下方に飛び出してしまい難く、接地面への接触を回避し易い。従って、例えば高温充填した場合であっても、可動壁部の上記飛び出しを抑制しながら充填作業を確実に行うことができる。 According to the blow bottle according to the present invention, when the inside of the bottle is decompressed, the depressed peripheral wall portion moves upward by the rotation of the movable wall portion, so that the decompression can be absorbed. In particular, the movable wall portion gradually extends downward from the outer end portion toward the inner end portion, and the height from the ground contact portion to the lowest end portion of the movable wall portion is the height from the ground contact portion to the outer end portion. Since the height difference between the outer end portion and the lowermost end portion is ensured to be 65% or less, it is easy to rotate the movable wall portion downward when filling the contents. Therefore, the volume in the bottle can be increased to increase the reduced pressure absorption capacity immediately after filling, thereby improving the reduced pressure absorption performance.
In addition, since the height from the grounding portion to the bottom end portion is 35% or more of the height from the grounding portion to the outer end portion, the distance between the bottom end portion and the grounding portion is sufficiently secured. When the movable wall portion is rotated downward with the filling of the contents, the lowermost end portion hardly protrudes below the grounding portion, and contact with the grounding surface is easily avoided. Therefore, for example, even when high temperature filling is performed, the filling operation can be reliably performed while suppressing the above-described jumping out of the movable wall portion.

また、可動壁部の最下端部の接地部からの高さが３ｍｍ以上とされているので、可動壁部の最下端部を接地面から十分に上方に離間させることが可能になり、上記飛び出しをより一層確実に抑制することができる。 Further, since the height from the grounding portion of the lowermost end of the movable wall portion is 3 mm or more, the lowermost end portion of the movable wall portion can be sufficiently separated from the grounding surface. Can be more reliably suppressed.

本発明に係るブローボトルによれば、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 blow bottle according to the present invention, the vacuum 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. 本発明に係る変形例を示すボトルの底面図である。It is a bottom view of the bottle which shows the modification which concerns on this invention. 図４に示すＢ−Ｂ線に沿ったボトルの断面図である。It is sectional drawing of the bottle along the BB 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回り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にボトル径方向の内側から連なり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 from the inner side in the bottle radial direction, and a depressed peripheral wall portion 23 that extends upward.

接地部１８は、接地面Ｇに対して例えば環状に線接触している。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、立ち上がり周壁部２１に接続される外端部から陥没周壁部２３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している。 The grounding portion 18 is in line contact with the grounding surface G, for example in an annular shape. 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 moves downward from the outer end portion connected to the rising peripheral wall portion 21 toward the inner end portion connected to the depressed peripheral wall portion 23. It is extended.

なお、本実施形態では、可動壁部２２と立ち上がり周壁部２１とが上方に向けて突の曲面部２５を介して連結されていると共に、可動壁部２２と陥没周壁部２３とが下方に向けて突の曲面部２６を介して連結されている。また、上記曲面部２５が可動壁部２２の外端部となり、上記曲面部２６が可動壁部２２の内端部でかつ最下端部となっている。
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、外端部である上記曲面部２５を中心に回動自在とされている。 In the present embodiment, the movable wall portion 22 and the rising peripheral wall portion 21 are connected to each other via a curved surface portion 25 protruding upward, and the movable wall portion 22 and the depressed peripheral wall portion 23 are directed downward. Are connected via a curved curved surface portion 26. Further, the curved surface portion 25 is an outer end portion of the movable wall portion 22, and the curved surface portion 26 is an inner end portion and a lowermost end portion of the movable wall portion 22.
The movable wall portion 22 is rotatable about the curved surface portion 25 as an outer end portion so that the depressed peripheral wall portion 23 is moved upward.

また、可動壁部２２の外端部である曲面部２５及び内端部である曲面部２６は、共に接地面Ｇから離間している。この際、接地部１８から内端部である曲面部２６までの高さＨ１は、３ｍｍ以上とされている。また、この高さＨ１は、接地部１８から外端部である曲面部２５までの高さＨ２の３５％以上６５％以下とされている。 Further, the curved surface portion 25 that is the outer end portion of the movable wall portion 22 and the curved surface portion 26 that is the inner end portion are both separated from the ground contact surface G. At this time, the height H1 from the grounding portion 18 to the curved surface portion 26 which is the inner end portion is set to 3 mm or more. Further, the height H1 is set to be 35% or more and 65% or less of the height H2 from the ground contact portion 18 to the curved surface portion 25 that is the outer end portion.

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、上記曲面部２６を介して可動壁部２２に連結されている。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 23 a is formed in a circular shape in cross section and is connected to the movable wall portion 22 via the curved surface portion 26. 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、曲面部２５を中心にして可動壁部２２が上方に向かって回動することで、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。 When the inside of the bottle 1 configured as described above is depressurized, the movable wall portion 22 lifts the depressed peripheral wall portion 23 upward by rotating the movable wall portion 22 upward about the curved surface portion 25. To move. 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.

特に、この可動壁部２２は、外端部である曲面部２５から内端部である曲面部２６に向かうに従い漸次下方に延在しているうえ、接地部１８から内端部である曲面部２６までの高さＨ１が接地部１８から外端部である曲面部２５までの高さＨ２の６５％以下とされて高低差が大きく確保されているので、内容物の充填時に可動壁部２２を下方に向けて回動させ易い。そのため、ボトル１内の容積を増大させて充填直後の減圧吸収量を高めることができ、これにより減圧吸収性能を向上させることができる。 In particular, the movable wall portion 22 extends gradually downward from the curved surface portion 25 that is the outer end portion toward the curved surface portion 26 that is the inner end portion, and the curved surface portion that is the inner end portion from the grounding portion 18. Since the height H1 up to 26 is 65% or less of the height H2 from the grounding portion 18 to the curved surface portion 25 that is the outer end portion, a large difference in height is secured, so the movable wall portion 22 is filled when the contents are filled. Can be easily turned downward. Therefore, the volume in the bottle 1 can be increased to increase the vacuum absorption immediately after filling, thereby improving the vacuum absorption performance.

しかも、前記高さＨ１が前記高さＨ２の３５％以上とされて、可動壁部２２の内端部である曲面部２６と接地部１８との距離が十分に確保されているので、内容物の充填に伴って可動壁部２２が下方に回動した際、曲面部２６が接地部１８よりも下方に飛び出してしまい難く、接地面Ｇへの接触を回避し易い。従って、高温充填した場合であっても、曲面部２６の上記飛び出しを抑制しながら充填作業を確実に行うことができる。
さらに、可動壁部２２の内端部である曲面部２６が接地部１８から上方に３ｍｍ以上離間しているので、曲面部２６を接地面Ｇから上方に十分に離間させることが可能になり、上記飛び出しをより一層確実に抑制することができる。 Moreover, since the height H1 is 35% or more of the height H2, and the distance between the curved surface portion 26 that is the inner end portion of the movable wall portion 22 and the grounding portion 18 is sufficiently secured, the contents When the movable wall portion 22 is rotated downward with the filling, the curved surface portion 26 hardly protrudes below the grounding portion 18 and it is easy to avoid contact with the grounding surface G. Therefore, even when the filling is performed at a high temperature, the filling operation can be reliably performed while suppressing the protrusion of the curved surface portion 26.
Furthermore, since the curved surface portion 26 that is the inner end portion of the movable wall portion 22 is spaced 3 mm or more upward from the grounding portion 18, the curved surface portion 26 can be sufficiently separated upward from the grounding surface G. The popping out can be more reliably suppressed.

なお、上記実施形態では、可動壁部２２の内端部である曲面部２６が該可動壁部２２において最も接地面Ｇに近い最下端部である場合を例に挙げたが、可動壁部２２の形状によってはボトル径方向の略中間部分が最下端部となる場合も考えられる。このような場合には、この最下端部までの高さが上記Ｈ１となる。 In the above-described embodiment, the case where the curved surface portion 26 that is the inner end portion of the movable wall portion 22 is the lowermost end portion closest to the ground contact surface G in the movable wall portion 22 is described as an example. Depending on the shape, a case where the substantially middle portion in the bottle radial direction is the lowermost end portion may be considered. In such a case, the height to the lowest end is H1.

また、本実施形態のボトル１は、内容量が１リットル以下、接地径が８５ｍｍ以下とされ、且つ８０℃以上（詳しくは８０℃から９５℃の温度範囲、より詳しくは８７℃程度の充填温度）で内容物を充填作業する際に用いられるボトルに好適である。 Further, the bottle 1 of the present embodiment has an internal volume of 1 liter or less, a grounding diameter of 85 mm or less, and 80 ° C. or more (more specifically, a temperature range of 80 ° C. to 95 ° C., more specifically a filling temperature of about 87 ° C. ) Is suitable for a bottle used when filling the contents.

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、上記実施形態において、図４及び図５に示すように、可動壁部２２に、ボトル軸Ｏを中心として複数のリブ４０を放射状に形成しても構わない。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、且つ直線状に延在して形成され、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。また、各凹部４０ａはそれぞれ同形同大に形成されており、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。 For example, in the above embodiment, as shown in FIGS. 4 and 5, a plurality of ribs 40 may be formed radially on the movable wall portion 22 around the bottle axis O. That is, the ribs 40 are arranged at equal intervals along the bottle circumferential direction.
In the illustrated example, the rib 40 is formed 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. A longitudinal cross-sectional view shape along the bottle radial direction is formed into a wave shape. Moreover, each recessed part 40a is each formed in the same shape and the same size, and is arrange | positioned 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.

このように、可動壁部２２に複数のリブ４０を形成することで、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るので、可動壁部２２をボトル１の内圧変化により速やかに対応して変形させることができる。 As described above, by forming the plurality of ribs 40 on the movable wall portion 22, the surface area of the movable wall portion 22 can be increased and the pressure receiving area can be increased. It can be deformed corresponding to.

更には、図４及び図５に示すように、立ち上がり周壁部２１に凹凸部４１を全周に亘って形成しても構わない。なお、凹凸部４１は、ボトル径方向の内側に向けて突の曲面状に形成された凸部４１ａが、ボトル周方向に間隔を開けて複数配設されることで構成されている。
このように、凹凸部４１を形成することで、例えば、立ち上がり周壁部２１に入射する光が凹凸部４１によって乱反射されたり、或いはボトル１内の内容物が凹凸部４１内にも満たされたりすること等によって、内容物が充填されたボトル１の底部１４を見たときに違和感を覚え難い。 Furthermore, as shown in FIG. 4 and FIG. 5, an uneven portion 41 may be formed on the rising peripheral wall portion 21 over the entire circumference. In addition, the uneven | corrugated | grooved part 41 is comprised by the convex part 41a formed in the curved surface shape projected toward the inner side of the bottle radial direction being arranged in multiple numbers at intervals in the bottle peripheral direction.
Thus, by forming the concavo-convex portion 41, for example, light incident on the rising peripheral wall portion 21 is irregularly reflected by the concavo-convex portion 41, or the contents in the bottle 1 are also filled in the concavo-convex portion 41. For example, it is difficult to feel uncomfortable when looking at the bottom 14 of the bottle 1 filled with the contents.

また、上記実施形態において、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。 Further, in the above-described embodiment, 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 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.

Ｏ…ボトル軸
１…ボトル
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…曲面部（可動壁部の外端部）
２６…曲面部（可動壁部の内端部） O ... bottle shaft 1 ... bottle 14 ... bottom 18 ... grounding part 19 ... bottom wall part 21 ... rising peripheral wall part 22 ... movable wall part 23 ... depressed peripheral wall part 25 ... curved surface part (outer end part of movable wall part)
26 ... curved surface (inner end of movable wall)

Claims

A blow bottle formed into a bottomed cylindrical shape with polyethylene terephthalate ,
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 from the inside in the bottle radial direction to the movable wall portion and extending upward,
The movable wall portion gradually extends downward from an outer end portion connected to the rising peripheral wall portion toward an inner end portion connected to the depressed peripheral wall portion, and the depressed peripheral wall portion faces upward. Arranged to be rotatable around the outer end so as to be moved,
The height from the grounding portion to the lowermost end portion of the movable wall portion is 35% to 65% of the height from the grounding portion to the outer end portion of the movable wall portion and 3 mm or more. ,
The diameter of the grounding portion is 85 mm or less, and the content of 80 ° C. or more is filled and used.
A top wall is connected to an upper end portion of the depressed peripheral wall portion, and the depressed peripheral wall portion is gradually reduced in diameter from the inner end portion in the bottle radial direction of the movable wall portion, The upper cylinder part that is gradually enlarged in diameter as it goes downward from the outer peripheral edge part of the top wall and that is formed in a curved surface shape projecting downward, and a step part that connects these two cylinder parts, Blow bottle characterized by having.