JP2012091828A - Bottle - Google Patents

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JP2012091828A
JP2012091828A JP2010240946A JP2010240946A JP2012091828A JP 2012091828 A JP2012091828 A JP 2012091828A JP 2010240946 A JP2010240946 A JP 2010240946A JP 2010240946 A JP2010240946 A JP 2010240946A JP 2012091828 A JP2012091828 A JP 2012091828A
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wall portion
bottle
movable wall
peripheral wall
radial direction
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JP5645602B2 (en
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Hiroaki Imai
宏明 今井
Tadakazu Nakayama
忠和 中山
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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 capable of enhancing decompression absorption capability in the bottle.SOLUTION: Regarding the bottomed cylindrical bottle 1 formed of a synthetic resin material, the bottom wall 19 of the bottom 14 includes: a grounding part 18 located at the outer peripheral edge; a standing peripheral wall 21 connected to the grounding part 18 from the inside in the bottle diameter direction and extending upward; an annular movable wall 22 projecting from the upper end of the standing peripheral wall 21 toward the inside in the bottle diameter direction; and a depressed peripheral wall 23 extending upward from the inner end in the bottle diameter direction of the movable wall 22. The movable wall 22 is arranged to be freely rotatable around a connection part 25 with the standing peripheral wall 21 so as to move the depressed peripheral wall 23 upward. The movable wall 22 is tilted downward toward the inside in the diameter direction all over the periphery, and a connection part 26 between the movable wall 22 and the depressed peripheral wall 23 is arranged below the connection part 25 between the movable wall 22 and the standing peripheral wall 21.

Description

本発明は、合成樹脂製のボトルに関する。   The present invention relates to a synthetic resin 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.

特表２００６−５２８１１６号公報JP-T-2006-528116

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、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。   Then, this invention was made | formed in view of the situation mentioned above, Comprising: The objective is to provide the bottle which can improve the pressure reduction absorption performance in a bottle.

上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、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、前記可動壁部は、前記陥没周壁部を上方に向けて移動させるように、前記立ち上がり周壁部との接続部を中心に回動自在に配設されており、前記可動壁部が、全周に亘って径方向内側に向かって下向きに傾斜しており、該可動壁部と前記陥没周壁部との接続部が、前記可動壁部と前記立ち上がり周壁部との接続部よりも下方に配設されていることを特徴としている。 In order to solve the above problems, the present invention proposes the following means.
The bottle according to the present invention is a bottle formed of a synthetic resin material in a bottomed cylindrical shape, wherein the bottom wall portion of the bottom portion is a grounding portion located at the outer peripheral edge portion, and the grounding portion has an inner side in the bottle radial direction. A rising peripheral wall portion that extends from the upper end of the rising peripheral wall portion, an annular movable wall portion that protrudes inward in the bottle radial direction from the upper end portion of the rising peripheral wall portion, and an inner end portion of the movable wall portion in the bottle radial direction. A recessed peripheral wall portion extending upward, and the movable wall portion is rotatably disposed around a connecting portion with the rising peripheral wall portion so as to move the depressed peripheral wall portion upward. The movable wall portion is inclined downward inward in the radial direction over the entire circumference, and a connecting portion between the movable wall portion and the depressed peripheral wall portion is connected to the movable wall portion and the rising portion. It is arranged below the connecting part with the peripheral wall part It is.

このような特徴により、ボトル内が減圧されたとき、陥没周壁部を上方（ボトル内方側）に移動させるように可動壁部が立ち上がり周壁部との接続部を中心に回動する。これにより、ボトル内の減圧が吸収される。このとき、可動壁部が、全周に亘って径方向内側に向かって下向きに傾斜しており、可動壁部と陥没周壁部との接続部が可動壁部と立ち上がり周壁部との接続部よりも下方に配設されているため、ボトル内の減圧時における可動壁部の回動量が大きくなり、その結果、底壁部の上方への変位量が大きくなる。   With such a feature, when the inside of the bottle is depressurized, the movable wall portion rises and rotates around the connecting portion with the peripheral wall portion so as to move the depressed peripheral wall portion upward (inner side of the bottle). Thereby, the decompression in a bottle is absorbed. At this time, the movable wall portion is inclined downward inward in the radial direction over the entire circumference, and the connection portion between the movable wall portion and the depressed peripheral wall portion is more than the connection portion between the movable wall portion and the rising peripheral wall portion. Is also disposed below, the amount of rotation of the movable wall portion during decompression in the bottle increases, and as a result, the amount of upward displacement of the bottom wall portion increases.

また、本発明に係るボトルは、前記可動壁部が、該可動壁部の内端から外端にかけて下向きに膨出した凸曲面状に形成されていることが好ましい。
これにより、ボトル内が減圧されたとき、可動壁部が曲がった状態から伸びる方向に変形しながら、可動壁部が立ち上がり周壁部との接続部を中心に回動するので、変形量をより大きく確保することができる。 In the bottle according to the present invention, it is preferable that the movable wall portion is formed in a convex curved shape that bulges downward from the inner end to the outer end of the movable wall portion.
As a result, when the inside of the bottle is depressurized, the movable wall portion is deformed in a direction extending from a bent state, and the movable wall portion rises and rotates around the connecting portion with the peripheral wall portion. Can be secured.

また、本発明に係るボトルは、前記可動壁部と前記陥没周壁部との接続部が、前記可動壁部よりも曲率半径が小さくボトル径方向内側に向かって膨出した凸曲面状に形成されていることが好ましい。
これにより、ボトル内が減圧されたとき、可動壁部と陥没周壁部との接続部が曲がった状態から伸びる方向に変形しながら、可動壁部が立ち上がり周壁部との接続部を中心に回動するので、可動壁部が回動しやすい。 In the bottle according to the present invention, a connecting portion between the movable wall portion and the depressed peripheral wall portion is formed in a convex curved shape having a smaller radius of curvature than the movable wall portion and bulging toward the inside in the bottle radial direction. It is preferable.
As a result, when the inside of the bottle is decompressed, the connecting portion between the movable wall portion and the depressed peripheral wall portion is deformed in a direction extending from the bent state, and the movable wall portion rises and rotates around the connecting portion with the peripheral wall portion. Therefore, the movable wall portion is easy to rotate.

また、本発明に係るボトルは、 前記陥没周壁部のうちの少なくとも下端部が、前記可動壁部よりも曲率半径が小さくボトル径方向内側に向かって膨出した凸曲面状に形成されていることが好ましい。
これにより、ボトル内が減圧されたとき、陥没周壁部の凸曲面状の部分が曲がった状態から伸びる方向に変形しながら、可動壁部が立ち上がり周壁部との接続部を中心に回動するので、可動壁部が回動しやすい。 In the bottle according to the present invention, at least a lower end portion of the depressed peripheral wall portion is formed in a convex curved shape having a smaller radius of curvature than the movable wall portion and bulging toward the inner side in the bottle radial direction. Is preferred.
As a result, when the inside of the bottle is depressurized, the movable wall portion rises and rotates around the connecting portion with the peripheral wall portion while the convex curved portion of the peripheral wall portion is deformed in a direction extending from the bent state. The movable wall part is easy to rotate.

本発明に係るボトルによれば、ボトル内の減圧時における可動壁部の回動量が大きくなるため、底壁部の変形量（陥没周壁部の上方移動量）が大きくなり、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 of the present invention, the amount of rotation of the movable wall portion during decompression in the bottle increases, so that the amount of deformation of the bottom wall portion (the amount of upward movement of the depressed peripheral wall portion) increases, and the reduced pressure absorption in the bottle. Performance 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. 本発明の実施形態におけるボトル底面図である。It is a bottle bottom view in the embodiment of the present invention. 図２に示すＡ−Ａ間の縦断面図である。It is a longitudinal cross-sectional view between AA shown in FIG. 本発明の変形例におけるボトル底面図である。It is a bottle bottom view in the modification of this invention. 図４に示すＢ−Ｂ間の縦断面図である。It is a longitudinal cross-sectional view between BB shown in FIG. 本発明の変形例におけるボトル底部の縦断面図である。It is a longitudinal cross-sectional view of the bottle bottom part in the modification of this invention.

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。
図１〜図３に示されるように、本実施形態に係るボトル１は、口部１１、肩部１２、胴部１３および底部１４を備え、これら１１〜１４が、それぞれの中心軸線を共通軸上に位置させた状態で、この順に連設された概略構成となっている。 Hereinafter, bottles according to embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, the bottle 1 according to this embodiment includes a mouth portion 11, a shoulder portion 12, a body portion 13, and a bottom portion 14, and these 11 to 14 have their central axes as a common axis. It is a schematic configuration that is arranged in this order in a state of being positioned above.

以下、前記共通軸をボトル軸Ｏといい、ボトル軸Ｏ方向に沿って前記口部側を上側、底部１４側を下側といい、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、雄ねじ部１１ａが形成されており、図示されないキャップが螺着される。さらに、口部１１、肩部１２、胴部１３および底部１４はそれぞれ、ボトル軸Ｏに直交する横断面視形状が円形状となっている。 Hereinafter, the common axis is referred to as the bottle axis O, the mouth side is referred to as the upper side, the bottom 14 side is referred to as the lower side along the bottle axis O direction, and the direction perpendicular to the bottle axis O is referred to as the bottle radial direction. The direction of circling around the bottle axis O is referred to as the 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. Further, the mouth portion 11 is formed with a male screw portion 11a, and a cap (not shown) is screwed thereon. Further, each of the mouth part 11, the shoulder part 12, the body part 13, and the bottom part 14 has a circular shape in a cross-sectional view 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、ボトル軸Ｏ方向の両端部同士の間は、これら両端部より小径に形成されている。胴部１３には、ボトル軸Ｏ方向に間隔をあけて複数の第２環状凹溝１５が全周に亘って連続して形成されている。 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 trunk | drum 13 is formed in a cylindrical shape, and between both ends of the bottle axis | shaft O direction is formed in a smaller diameter than these both ends. A plurality of second annular grooves 15 are continuously formed in the body portion 13 over the entire circumference at intervals in the bottle axis O direction.

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筒状のヒール部１７と、ヒール部１７の下端開口部を閉塞する底壁部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 is formed in a cup shape having a cylindrical heel portion 17 whose upper end opening is connected to the lower end opening of the body portion 13 and a bottom wall portion 19 that closes the lower end opening of the heel portion 17. ing.

ヒール部１７は、ボトル軸Ｏを中心軸線にしてボトル軸Ｏ方向に沿って延在する円筒形状の筒部である。このヒール部１７は、第３環状凹溝２０を介して胴部１３の下端に連結された上ヒール部２８と、上ヒール部２８の下端に連結されたヒール下端部２７と、を備えている。上ヒール部２８は、胴部１３のボトル軸Ｏ方向の両端部とともに、ボトル１の最大外径部となっており、この上ヒール部２８には、第３環状凹溝２０と同じ深さの第４環状凹溝３１が全周に亘って連続して形成されている。ヒール下端部２７は、上ヒール部２８より小径に形成されており、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いる。   The heel portion 17 is a cylindrical tube portion that extends along the bottle axis O direction with the bottle axis O as the central axis. The heel portion 17 includes an upper heel portion 28 connected to the lower end of the trunk portion 13 via the third annular groove 20 and a heel lower end portion 27 connected to the lower end of the upper heel portion 28. . 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. The upper heel portion 28 has the same depth as the third annular groove 20. A fourth annular groove 31 is formed continuously over the entire circumference. The heel lower end portion 27 is formed to have a smaller diameter than the upper heel portion 28, and 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.

底壁部１９は、図３に示されるように、外周縁部に位置する接地部１８と、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、陥没周壁部２３の上端開口部を閉塞する閉塞壁部２４と、を備えている。   As shown in FIG. 3, the bottom wall portion 19 includes a grounding portion 18 located at the outer peripheral edge portion, a rising peripheral wall portion 21 that extends from the inside in the bottle radial direction to the grounding portion 18 and extends upward, and a rising peripheral wall portion. An annular movable wall portion 22 projecting inward from the upper end portion of the bottle 21 in the bottle radial direction, a depressed peripheral wall portion 23 extending upward from an inner end portion of the movable wall portion 22 in the bottle radial direction, and a depressed peripheral wall portion And a closing wall portion 24 that closes the upper end opening of 23.

接地部１８は、ヒール下端部２７の下端の全周に亘って接続された横断面視円環状の環状部であり、下向きに膨出した凸曲面状の曲面部である。すなわち、接地部１８は、ヒール下端部２７の下端から連なり、径方向内側に折り曲げられて上方に向けて延びて縦断面視Ｕ字状に形成されている。   The grounding portion 18 is an annular annular portion that is connected over the entire circumference of the lower end of the heel lower end portion 27, and is a convex curved surface portion that bulges downward. That is, the grounding portion 18 is continuous from the lower end of the heel lower end portion 27, is bent inward in the radial direction, extends upward, and is formed in a U shape in a longitudinal section.

立ち上がり周壁部２１は、接地部１８の内端に全周に亘って接続された円筒状の筒部であり、上記したヒール下端部２７の径方向内側に配置されていると共にボトル軸Ｏを共通軸にしてヒール下端部２７と同軸上に配設されている。立ち上がり周壁部２１は、下端から上方に向かうに従い漸次縮径しており、ヒール下端部２７の上端と略同じボトル軸Ｏ方向位置まで延在している。   The rising peripheral wall portion 21 is a cylindrical tube portion that is connected to the inner end of the ground contact portion 18 over the entire circumference, and is disposed on the radially inner side of the above-described heel lower end portion 27 and shares the bottle shaft O. The shaft is arranged coaxially with the heel lower end 27. The rising peripheral wall portion 21 is gradually reduced in diameter as it goes upward from the lower end, and extends to the bottle axis O direction position substantially the same as the upper end of the heel lower end portion 27.

可動壁部２２は、平面視円環状のリング壁部であり、全周に亘ってボトル径方向内側に向かって下向きに傾斜していると共に、可動壁部２２の内端から外端にかけてボトル外方側（下向き）に膨出した凸曲面状に形成されている。この可動壁部２２のボトル径方向外側の端部（外端部）は全周に亘って外端接続部２５（接続部）を介して立ち上がり周壁部２１の上端に接続されている。この外端接続部２５は、上方（ボトル内方側）に向けて窪んだ凹曲面状の曲面部である。すなわち、外端接続部２５は、立ち上がり周壁部２１の上端から連なり、径方向内側に折り曲げられて下方に向けて延び、可動壁部２２の外端に連なる。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、縦断面視において外端接続部２５を中心に回動自在となっている。   The movable wall portion 22 is an annular ring wall portion in plan view, is inclined downward toward the inner side in the bottle radial direction over the entire circumference, and is outside the bottle from the inner end to the outer end of the movable wall portion 22. It is formed in a convex curved shape that bulges to the side (downward). The end (outer end) of the movable wall portion 22 on the outer side in the bottle radial direction is connected to the upper end of the rising peripheral wall portion 21 through the outer end connection portion 25 (connection portion) over the entire circumference. The outer end connection portion 25 is a concave curved surface portion that is recessed upward (inner side of the bottle). That is, the outer end connection portion 25 is continuous from the upper end of the rising peripheral wall portion 21, is bent radially inward and extends downward, and is continuous with the outer end of the movable wall portion 22. The movable wall portion 22 is rotatable about the outer end connection portion 25 in a longitudinal sectional view so as to move the depressed peripheral wall portion 23 upward.

陥没周壁部２３は、上方から下方に向かうに従い漸次拡径するとともに多段に形成された筒部であり、ヒール部１７の内側に配設されていると共にボトル軸Ｏを共通軸にしてヒール部１７と同軸上に配設されている。この陥没周壁部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テーパー状の下筒部２３ａと、閉塞壁部２４の外周縁部から下方に向かうに従い漸次拡径されると共にボトル外方側（ボトル径方向内側）に膨出した凸曲面状の上筒部２３ｂと、これらの両筒部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 is a cylindrical portion that is gradually enlarged in diameter from the upper side toward the lower side and is formed in multiple stages, and is disposed inside the heel portion 17 and is disposed on the inner side of the heel portion 17 and has the bottle axis O as a common axis. And are arranged on the same axis. The depressed peripheral wall portion 23 has a tapered lower cylindrical portion 23 a that is gradually reduced in diameter from the inner end portion in the bottle radial direction of the movable wall portion 22, and downward from the outer peripheral edge portion of the blocking wall portion 24. And a stepped portion 23c that connects these cylindrical portions 23a and 23b, and a convexly curved upper cylindrical portion 23b that is gradually enlarged in diameter and bulges outwardly from the bottle (inner side in the bottle radial direction). It is formed in a two-stage cylindrical shape.

下筒部２３ａは、図２に示されるように横断面視円環状に形成されている。この下筒部２３ａの下端部は、図３に示されるように、可動壁部２２のボトル径方向内側の端部（内端部）に、下筒部２３ａの下端が全周に亘って内端接続部２６を介して連結されている。この内端接続部２６は、ボトル径方向内側に向けて膨出した凸曲面状の曲面部である。すなわち、内端接続部２６は、可動壁部２２の内端から連なり、上方に向けて折り曲げられて上方に向けて延び、下筒部２３ａの下端に連なり、縦断面視略１／４円弧状に形成されている。この内端接続部２６は可動壁部２２よりも小さい凸曲面部であり、内端接続部２６の曲率半径Ｒ１は、可動壁部２２の曲率半径Ｒ２よりも小さく、また、内端接続部２６のボトル径方向の長さＬ１は、可動壁部２２のボトル径方向の長さＬ２よりも短い。 As shown in FIG. 2, the lower cylinder portion 23a is formed in an annular shape when viewed in cross section. As shown in FIG. 3, the lower end portion of the lower tube portion 23a is located at the inner end portion (inner end portion) of the movable wall portion 22 in the bottle radial direction, and the lower end portion of the lower tube portion 23a extends over the entire circumference. The end connection part 26 is connected. The inner end connecting portion 26 is a convex curved surface that bulges inward in the bottle radial direction. That is, the inner end connection portion 26 is continuous from the inner end of the movable wall portion 22, is bent upward and extends upward, is continuous with the lower end of the lower cylinder portion 23 a, and has a substantially arc shape in a longitudinal section. Is formed. The inner end connection portion 26 is a convex curved surface portion that is smaller than the movable wall portion 22, the radius of curvature R 1 of the inner end connection portion 26 is smaller than the curvature radius R 2 of the movable wall portion 22, and the inner end connection. bottle radial length L 1 of the parts 26 is shorter than the bottles radial length L 2 of the movable wall portion 22.

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。張出部２３ｄは、上筒部２３ｂの上端部を除くボトル軸Ｏ方向のほぼ全長にわたって形成されており、図２に示されるように、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あけて配置されている。   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 overhang portions 23d are formed in the bottle circumferential direction as shown in FIG. In the illustrated example, the overhanging portions 23d adjacent in the bottle circumferential direction are arranged with an interval in the bottle circumferential direction.

そして、上筒部２３ｂ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、横断面視多角形状（図示の例では略正三角形状）から横断面視円形状に漸次変形していて、上筒部２３ｂの上端部は、横断面視円形状となっている。上筒部２３ｂのうち、横断面視多角形状の部分では、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。   The upper tube portion 23b is gradually deformed from a polygonal shape in a cross-sectional view (substantially a regular triangle shape in the illustrated example) to a circular shape in a cross-sectional view as it extends upward from the bottom by forming an overhang portion 23d. And the upper end part of the upper cylinder part 23b is cross-sectional view circular shape. Of the upper tube portion 23b, in the polygonal portion in cross-sectional view, the overhang portion 23d is a polygonal side portion, and an intermediate portion 23e located between the overhang portions 23d adjacent in the bottle circumferential direction is It has a polygonal corner.

また図３に示されるように、閉塞壁部２４は、ボトル軸Ｏに対して垂直に配設された平面視円形状の平板部であり、閉塞壁部２４のボトル径方向外側の端部（外端部）が上筒部２３ｂの上端に全周に亘って連結されている。そして、陥没周壁部２３および閉塞壁部２４は全体で有頂筒状をなしている。
なお、上記した立ち上がり周壁部２１の上端とその立ち上がり周壁部２１の上端よりも上方に配設された閉塞壁部２４の外縁との間に形成された環状の底面部（可動壁部２２及び陥没周壁部２３）は、全周に亘って下向きに膨出され、縦半断面視において略Ｕ字状（略Ｖ字状或いは略Ｌ字状）に形成されている。 Further, as shown in FIG. 3, the closing wall portion 24 is a flat plate portion having a circular shape in a plan view and arranged perpendicularly to the bottle axis O. The outer end portion) is connected to the upper end of the upper cylinder portion 23b over the entire circumference. And the depression surrounding wall part 23 and the obstruction | occlusion wall part 24 have comprised the top cylinder shape as a whole.
An annular bottom surface (movable wall portion 22 and depression) formed between the upper end of the rising peripheral wall portion 21 and the outer edge of the blocking wall portion 24 disposed above the upper end of the rising peripheral wall portion 21. The peripheral wall portion 23) bulges downward over the entire circumference, and is formed in a substantially U shape (substantially V shape or substantially L shape) in a longitudinal half sectional view.

次に、上記した構成からなるボトル１の作用について説明する。   Next, the operation of the bottle 1 having the above configuration will be described.

上記した構成のボトル１の内圧が減圧されると、底壁部１９の内面に負圧が作用し、可動壁部２２が、陥没周壁部２３及び閉塞壁部２４を上方に移動させるように縦断面視において外端接続部２５を中心にして上方に向かって回動する。これにより、ボトル１内の減圧が吸収される。   When the internal pressure of the bottle 1 configured as described above is reduced, a negative pressure is applied to the inner surface of the bottom wall portion 19, and the movable wall portion 22 is longitudinally moved so as to move the depressed peripheral wall portion 23 and the closed wall portion 24 upward. In a plan view, it rotates upward with the outer end connecting portion 25 as the center. Thereby, the reduced pressure in the bottle 1 is absorbed.

このとき、可動壁部２２が下向きに膨出した凸曲面状に形成されているので、上述したように可動壁部２２が回動すると共に、可動壁部２２が凸曲面状に湾曲した状態から真直ぐ（平面状）に伸びる方向に変形する。
また、内端接続部２６が径方向内側に膨出した凸曲面状（縦断面視１／４円弧状）に形成されているので、上述したように可動壁部２２が回動すると共に、内端接続部２６が１／４円弧状に曲がった状態から伸びる方向に変形する。
さらに、外端接続部２５が上方（ボトル内方側）に向けて窪んだ凹曲面状（縦断面視略逆Ｕ字状）に形成されているので、上述したように可動壁部２２が回動すると共に、外端接続部２５が逆Ｕ字状の口が開くように変形する。 At this time, since the movable wall portion 22 is formed in a convex curved shape that bulges downward, the movable wall portion 22 rotates as described above, and the movable wall portion 22 is curved from the convex curved shape. Deforms in a direction that extends straight (planar).
In addition, since the inner end connecting portion 26 is formed in a convex curved surface shape (¼ arc shape in longitudinal section view) bulging radially inward, the movable wall portion 22 rotates as described above, The end connecting portion 26 is deformed in a direction extending from a state where the end connecting portion 26 is bent in a ¼ arc shape.
Furthermore, since the outer end connecting portion 25 is formed in a concave curved surface shape (substantially U-shaped in a longitudinal sectional view) recessed toward the upper side (inner side of the bottle), the movable wall portion 22 rotates as described above. The outer end connecting portion 25 is deformed so as to open an inverted U-shaped mouth.

上記したボトル１によれば、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、胴部１３等の変形を伴うことなく、ボトル１の内圧変化（減圧）を吸収することができる。
しかも、可動壁部２２が径方向内側に向かって下向きに傾斜しており、内端接続部２６が外端接続部２５よりも下方に配設されているので、ボトル１内の減圧時における可動壁部２２の回動量が大きくなり、底壁部１９の上方への変位量が大きくなる。これにより、ボトル１内の減圧吸収性能を向上させることができる。 According to the bottle 1 described above, the bottom wall portion 19 of the bottle 1 is positively deformed at the time of decompression, so that the internal pressure change (decompression) of the bottle 1 can be absorbed without deformation of the body portion 13 or the like. it can.
In addition, since the movable wall portion 22 is inclined downward inward in the radial direction and the inner end connection portion 26 is disposed below the outer end connection portion 25, the movable wall portion 22 is movable when the bottle 1 is decompressed. The amount of rotation of the wall portion 22 increases, and the amount of upward displacement of the bottom wall portion 19 increases. Thereby, the vacuum absorption performance in the bottle 1 can be improved.

また、上記したボトル１では、可動壁部２２が凸曲面状の形状から伸びるように変形しながら回動するので、底壁部１９の変形量（陥没周壁部２３及び閉塞壁部２４の上方移動量）が大きくなり、ボトル１内の減圧吸収性能を向上させることができる。   Further, in the bottle 1 described above, the movable wall portion 22 rotates while being deformed so as to extend from the convex curved shape, so that the deformation amount of the bottom wall portion 19 (the upward movement of the depressed peripheral wall portion 23 and the closed wall portion 24). The amount of the reduced pressure absorption performance in the bottle 1 can be improved.

さらに、縦断面視略逆Ｕ字状の外端接続部２５及び縦断面視略Ｕ字状の内端接続部２６がそれぞれ開くように変形しながら可動壁部２２が回動するので、可動壁部２２が回動しやすくなり、ボトル１の内圧変化に応じて底壁部１９を柔軟に変形させることができる。   Further, the movable wall portion 22 is rotated while being deformed so that the outer end connecting portion 25 having a substantially inverted U shape in the longitudinal section and the inner end connecting portion 26 having a substantially U shape in the longitudinal section are opened. The part 22 becomes easy to rotate, and the bottom wall part 19 can be flexibly deformed according to a change in the internal pressure of the bottle 1.

以上、本発明に係るボトルの実施の形態について説明したが、本発明は上記した実施の形態に限定されるものではなく、その趣旨を逸脱しない範囲で適宜変更可能である。
例えば、図４および図５に示すボトル４０のように、可動壁部２２に、複数のリブ４１がボトル軸Ｏを中心に放射状に配設されていても良い。なおリブ４１は、上方に向けて曲面状に窪んだ複数の凹部４１ａがボトル径方向に沿って断続的に配設されてなる。
さらに前記ボトル４０のように、立ち上がり周壁部２１に凹凸部４２が全周に亘って形成されていても良い。なお凹凸部４２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複数の突部４２ａが、ボトル周方向に間隔をあけて配設されてなる。この突部４２ａは、立ち上がり周壁部２１において下端部よりも上側に位置する部分に配置されている。 As mentioned above, although embodiment of the bottle which concerns on this invention was described, this invention is not limited to above-described embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, like the bottle 40 shown in FIGS. 4 and 5, a plurality of ribs 41 may be radially arranged around the bottle axis O on the movable wall portion 22. The rib 41 is formed by intermittently arranging a plurality of concave portions 41a recessed in a curved shape upward.
Further, as in the case of the bottle 40, an uneven portion 42 may be formed on the rising peripheral wall portion 21 over the entire circumference. In addition, the uneven | corrugated | grooved part 42 is arrange | positioned at intervals in the bottle peripheral direction by the some protrusion 42a formed in the curved surface shape which protruded toward the inner side of the bottle radial direction. The protrusion 42a is disposed in a portion of the rising peripheral wall portion 21 that is located above the lower end portion.

また、本発明は、図６に示すボトル５０のように、陥没周壁部１２３が全周に亘ってボトル径方向内側に膨出した凸曲面状に形成されていてもよい。詳しく説明すると、陥没周壁部１２３は、縦断面視において下方に向かって漸次拡径されたすり鉢形状に形成されており、下方に向かってボトル径方向外側に傾斜されていると共に上端から下端にかけてボトル径方向内側に向かって縦断面視円弧状に膨出している。この陥没周壁部１２３の曲率半径Ｒ３は、内端から外端にかけて下向きに膨出した凸曲面状の可動壁部１２２の曲率半径Ｒ４よりも小さい。また、上記した陥没周壁部１２３の下端は、全周に亘って径方向内側に向かって下向きに傾斜した可動壁部１２２の内端に直接接続されており、陥没周壁部１２３と可動壁部１２２とは連続して連なっている。そして、これら陥没周壁部１２３及び可動壁部１２２からなる環状の底面部は、全周に亘って陥没周壁部１２３の上端から可動壁部１２２の外端にかけて下向きに膨出されており、縦半断面視において略Ｕ字状に形成されている。 Further, in the present invention, as in the bottle 50 shown in FIG. 6, the depressed peripheral wall portion 123 may be formed in a convex curved shape that bulges inward in the bottle radial direction over the entire circumference. More specifically, the depressed peripheral wall portion 123 is formed in a mortar shape that gradually increases in diameter downward in a longitudinal sectional view, is inclined outward in the bottle radial direction toward the lower side, and is bottled from the upper end to the lower end. It bulges in an arc shape in the longitudinal section toward the inside in the radial direction. The curvature radius R 3 of the depressed peripheral wall portion 123 is smaller than the curvature radius R 4 of the convex curved movable wall portion 122 that bulges downward from the inner end to the outer end. In addition, the lower end of the above-described depressed peripheral wall portion 123 is directly connected to the inner end of the movable wall portion 122 inclined downward inward in the radial direction over the entire circumference, and the depressed peripheral wall portion 123 and the movable wall portion 122. Are connected continuously. The annular bottom surface portion including the depressed peripheral wall portion 123 and the movable wall portion 122 bulges downward from the upper end of the depressed peripheral wall portion 123 to the outer end of the movable wall portion 122 over the entire circumference. It is formed in a substantially U shape in a cross-sectional view.

上記した構成のボトル５０によれば、ボトル５０内が減圧されたとき、陥没周壁部１２３が曲がった状態から伸びる方向に変形しながら、可動壁部１２２が立ち上がり周壁部２１との接続部２５を中心に回動するので、可動壁部１２２が回動しやすい。したがって、ボトル５０内の減圧吸収性能を向上させることができる。   According to the bottle 50 having the above-described configuration, when the inside of the bottle 50 is depressurized, the movable wall portion 122 rises while the deformed peripheral wall portion 123 is deformed in a direction extending from the bent state, and the connecting portion 25 with the peripheral wall portion 21 is formed. Since it rotates to the center, the movable wall part 122 is easy to rotate. Therefore, the vacuum absorption performance in the bottle 50 can be improved.

なお、上記した凸曲面状の可動壁部１２２及び陥没周壁部１２３は、それぞれ単数の曲面で形成されているが、可動壁部１２２や陥没周壁部１２３が複数の曲面で形成されていてもよい。また、陥没周壁部１２３は少なくとも、可動壁部１２２に接続される下端部が凸曲面状に形成されていればよく、例えば陥没周壁部の下部が凸曲面状に形成され、陥没周壁部の上部が円錐台形状或いは直円筒形状に形成されていてもよい。
また、上記した陥没周壁部１２３の下端が、例えば図３に示す内端接続部２６のような接続部を介して可動壁部１２２の内端に接続された構造であってもよい。
また、上記した可動壁部１２２に、図４及び図５に示すようなリブ４１を形成することも可能である。これにより、ボトル５０内が減圧されたときに可動壁部１２２が回動しやすくなる。 The convex curved movable wall 122 and the depressed peripheral wall 123 are each formed by a single curved surface, but the movable wall 122 and the depressed peripheral wall 123 may be formed by a plurality of curved surfaces. . The depressed peripheral wall portion 123 only needs to have at least a lower end portion connected to the movable wall portion 122 formed in a convex curved shape. For example, a lower portion of the depressed peripheral wall portion is formed in a convex curved shape, and an upper portion of the depressed peripheral wall portion is formed. May be formed in a truncated cone shape or a right cylindrical shape.
Moreover, the structure where the lower end of the above-mentioned depression surrounding wall part 123 was connected to the inner end of the movable wall part 122 via the connection part like the inner end connection part 26 shown, for example in FIG. 3 may be sufficient.
Moreover, it is also possible to form the rib 41 as shown in FIG.4 and FIG.5 in the above-mentioned movable wall part 122. FIG. Thereby, when the inside of the bottle 50 is pressure-reduced, the movable wall part 122 becomes easy to rotate.

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、適宜変更してもよい。
また、上記した実施形態では、可動壁部２２が下向きに膨出した凸曲面状に形成されているが、本発明は、可動壁部が平面状や凹曲面状に形成されてもよい。 The rising peripheral wall portion 21 may be appropriately changed, for example, extending in parallel along the bottle axis O direction.
In the above-described embodiment, the movable wall portion 22 is formed in a convex curved shape that bulges downward. However, in the present invention, the movable wall portion may be formed in a flat shape or a concave curved shape.

また、上記した実施形態では、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あ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、前記張出部２３ｄ同士が、ボトル周方向に間隔をあけず配置され、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方向の全長にわたって円形状となっていても良い。   In the above-described embodiment, the overhang portions 23d adjacent to each other in the bottle circumferential direction are arranged at intervals in the bottle circumferential direction. However, the present invention is not limited to this. The protruding portions 23d may be arranged without being spaced apart from each other in the bottle circumferential direction, and may be directly connected to each other. In this case, the cross-sectional view shape in the part in which the overhang | projection part 23d is arrange | positioned among the upper cylinder parts 23b may be circular, and the cross-sectional view shape of the upper cylinder part 23b is a bottle axis | shaft O direction. It may be circular over the entire length.

さらに、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けて延びていれば、ボトル軸Ｏ方向に沿って平行に延在させる等、適宜変更することが可能である。つまり、前記張出部２３ｂがなくても良く、上方から下方に向かうに従い漸次、拡径していなくても良く、多段に形成されていなくても良い。   Further, the depressed peripheral wall portion 23 can be appropriately changed, such as extending in parallel along the bottle axis O direction as long as it extends upward from the inner end portion of the movable wall portion 22 in the bottle radial direction. It is. That is, the protruding portion 23b may not be provided, and the diameter may not be gradually increased from the upper side toward the lower side, and may not be formed in multiple stages.

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や積層構成等、適宜変更してもよい。
また、前記実施形態では、肩部１２、胴部１３および底部１４のそれぞれのボトル軸Ｏに直交する横断面視形状を円形状としたが、これに限らず例えば、多角形状にする等適宜変更してもよい。 Further, the synthetic resin material forming the bottle 1 may be appropriately changed, for example, polyethylene terephthalate, polyethylene naphthalate, amorphous polyester, or a blend material or a laminated structure thereof.
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 circular shape, it changes suitably, for example not only to this but polygonal shape May be.

また、上記した実施の形態では、可動壁部２２と陥没周壁部２３とを接続する内端接続部２６が、可動壁部２２よりも曲率半径が小さくボトル径方向内側に向かって膨出した凸曲面状に形成されているが、本発明は、内端接続部２６の曲率半径を可動壁部２２と略同程度の曲率半径にすることも可能であり、また、可動壁部２２の内端と陥没周壁部２３の下端とが直接接続された構成にすることも可能である。   Further, in the above-described embodiment, the inner end connecting portion 26 that connects the movable wall portion 22 and the depressed peripheral wall portion 23 has a smaller radius of curvature than the movable wall portion 22 and protrudes toward the inner side in the bottle radial direction. Although it is formed in a curved surface shape, in the present invention, the radius of curvature of the inner end connection portion 26 can be made substantially the same as that of the movable wall portion 22, and the inner end of the movable wall portion 22 can be made. It is also possible to have a configuration in which the lower end of the depressed peripheral wall portion 23 is directly connected.

その他、本発明の主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、上記した変形例を適宜組み合わせてもよい。   In addition, in the range which does not deviate from the main point of this invention, it is possible to replace suitably the component in above-mentioned embodiment with a well-known component, and you may combine the above-mentioned modification suitably.

１、４０、５０ ボトル
１４ 底部
１８ 接地部
１９ 底壁部
２１ 立ち上がり周壁部
２２、１２２ 可動壁部
２３、１２３ 陥没周壁部
２５ 外端接続部（可動壁部と立ち上がり周壁部との接続部）
２６ 内端接続部（可動壁部と陥没周壁部との接続部） DESCRIPTION OF SYMBOLS 1, 40, 50 Bottle 14 Bottom part 18 Grounding part 19 Bottom wall part 21 Standing peripheral wall part 22, 122 Movable wall part 23, 123 Depression peripheral wall part 25 Outer end connection part (connection part of a movable wall part and a rising peripheral wall part)
26 Inner end connection part (connection part of movable wall part and depressed peripheral wall part)

Claims (4)

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、
前記可動壁部は、前記陥没周壁部を上方に向けて移動させるように、前記立ち上がり周壁部との接続部を中心に回動自在に配設されており、
前記可動壁部が、全周に亘って径方向内側に向かって下向きに傾斜しており、該可動壁部と前記陥没周壁部との接続部が、前記可動壁部と前記立ち上がり周壁部との接続部よりも下方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,
The movable wall portion is rotatably disposed around a connection portion with the rising peripheral wall portion so as to move the depressed peripheral wall portion upward.
The movable wall portion is inclined downward inward in the radial direction over the entire circumference, and a connection portion between the movable wall portion and the depressed peripheral wall portion is formed between the movable wall portion and the rising peripheral wall portion. A bottle characterized in that it is disposed below the connecting portion. 請求項１に記載のボトルにおいて、
前記可動壁部が、該可動壁部の内端から外端にかけて下向きに膨出した凸曲面状に形成されていることを特徴とするボトル。 The bottle according to claim 1,
The bottle characterized in that the movable wall portion is formed in a convex curved shape that bulges downward from the inner end to the outer end of the movable wall portion. 請求項１または２に記載のボトルにおいて、
前記可動壁部と前記陥没周壁部との接続部が、前記可動壁部よりも曲率半径が小さくボトル径方向内側に向かって膨出した凸曲面状に形成されていることを特徴とするボトル。 In the bottle according to claim 1 or 2,
The connection part of the said movable wall part and the said depression surrounding wall part is formed in the convex curve shape which the curvature radius is smaller than the said movable wall part, and bulged toward the bottle radial direction inner side. 請求項２または３に記載のボトルにおいて、
前記陥没周壁部のうちの少なくとも下端部が、前記可動壁部よりも曲率半径が小さくボトル径方向内側に向かって膨出した凸曲面状に形成されていることを特徴とするボトル。 The bottle according to claim 2 or 3,
A bottle characterized in that at least a lower end portion of the depressed peripheral wall portion is formed in a convex curved surface shape having a smaller radius of curvature than the movable wall portion and bulging inward in the bottle radial direction.
JP2010240946A 2010-10-27 2010-10-27 Bottle Active JP5645602B2 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008254244A (en) * 2007-04-02 2008-10-23 Hokkai Can Co Ltd Method for manufacturing synthetic resin bottle
WO2010056517A1 (en) * 2008-11-17 2010-05-20 Amcor Limited Container base structure responsive to vacuum related forces
WO2010061758A1 (en) * 2008-11-27 2010-06-03 株式会社 吉野工業所 Synthetic resin bottle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008254244A (en) * 2007-04-02 2008-10-23 Hokkai Can Co Ltd Method for manufacturing synthetic resin bottle
WO2010056517A1 (en) * 2008-11-17 2010-05-20 Amcor Limited Container base structure responsive to vacuum related forces
WO2010061758A1 (en) * 2008-11-27 2010-06-03 株式会社 吉野工業所 Synthetic resin bottle

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