JP2009154963A - Resin container - Google Patents

Resin container Download PDF

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JP2009154963A
JP2009154963A JP2007338937A JP2007338937A JP2009154963A JP 2009154963 A JP2009154963 A JP 2009154963A JP 2007338937 A JP2007338937 A JP 2007338937A JP 2007338937 A JP2007338937 A JP 2007338937A JP 2009154963 A JP2009154963 A JP 2009154963A
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container
resin container
column
along
trunk
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Masaki Miura
正樹 三浦
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Toyo Seikan Group Holdings Ltd
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Toyo Seikan Kaisha Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin container having an excellent pressure reduction absorbing performance capable of absorbing reduction of internal pressure after filling and sealing by preventing the container from being inflated when the container is filled with contents and sealed. <P>SOLUTION: A plurality of pillar sections 5 allocated approximately at equal angle intervals along the peripheral direction of the container 1, are curved for configuration along the longitudinal direction so that they project out to the exterior of the container, while, in approximately the middle of the surfaces formed in between the respective neighboring pillar sections 5, groove portions 6 constituted of two surfaces 61, 61 that are crossed in such a way that they project to the inward of the container. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、優れた減圧吸収性能を発揮することができる樹脂製容器に関する。   The present invention relates to a resin container capable of exhibiting excellent reduced pressure absorption performance.

従来、ポリエチレンテレフタレートなどの合成樹脂を用いてプリフォームを形成し、次いで、このプリフォームを延伸ブロー成形などによってボトル状に成形してなる合成樹脂製の容器が、各種飲料品を内容物とする飲料用容器として利用されている。そして、この種の容器に内容物を充填するに際しては、充填後の菌の繁殖を抑えるために、内容物を高温で充填することが知られているが、この場合、内容物を充填、密封した後に冷却されると、容器内が減圧状態になることから、内圧減少にともなう容器の不均一な形状変化を防止するための減圧吸収構造が必要となる。   Conventionally, a synthetic resin container formed by forming a preform using a synthetic resin such as polyethylene terephthalate and then molding the preform into a bottle shape by stretch blow molding or the like contains various beverage products. It is used as a beverage container. And when filling this kind of container with the contents, it is known that the contents are filled at a high temperature in order to suppress the growth of bacteria after filling, but in this case, the contents are filled and sealed. Then, when the container is cooled, the inside of the container is in a reduced pressure state, so that a reduced pressure absorption structure for preventing an uneven shape change of the container with a decrease in the inner pressure is required.

例えば、特許文献１では、このような減圧吸収構造として、ボトル本体の壁面に、内側に湾曲した縦長凹面を細い柱部で挟んで２本配置してなる減圧吸収パネルを、太い柱部で挟んでボトルの外周に複数組配列することが提案されている。
特開平７−１０１４７号公報 For example, in Patent Document 1, as such a vacuum absorption structure, a vacuum absorption panel in which two vertically long concave surfaces curved inward are sandwiched between thin column portions on a wall surface of a bottle body is sandwiched between thick column portions. It is proposed to arrange a plurality of sets on the outer periphery of the bottle.
Japanese Patent Laid-Open No. 7-10147

ところで、加温された内容物を充填、密封する際には、その熱や自重に加え、充填に際して容器内に作用する圧力などによって、容器が膨らむように変形してしまう傾向にあり、これによって容器が不均一に変形してしまうと、その商品価値を著しく損ねてしまう。
しかしながら、このような充填時の膨らみに耐えられるように容器の剛性を高めると、減圧吸収パネルの好ましい変形が妨げられ、減圧吸収性能が低下してしまうというように、両者は相反する関係にあり、容器形状を実際に設計するにあたっては、これらのバランスを考慮することとなる。このため、特許文献１に例示されるような従来の減圧吸収構造では、その減圧吸収性能を高めるには限界があった。 By the way, when filling and sealing the heated contents, in addition to the heat and dead weight, the pressure acting on the container during filling tends to cause the container to swell and deform. If the container is deformed unevenly, its commercial value is significantly impaired.
However, if the rigidity of the container is increased so that it can withstand such swelling during filling, the preferred deformation of the vacuum absorption panel is hindered, and the vacuum absorption performance is reduced. When actually designing the container shape, these balances are taken into consideration. For this reason, the conventional reduced pressure absorption structure exemplified in Patent Document 1 has a limit in improving the reduced pressure absorption performance.

本発明は、上記の事情に鑑みてなされたものであり、内容物を充填、密封する際に、容器が膨らむように変形してしまうのを抑止した上で、内容物を充填、密封した後の内圧減少を十分に吸収し得る優れた減圧吸収性能が発揮される樹脂製容器の提供を目的とする。   The present invention has been made in view of the above circumstances, and after filling and sealing the contents, the container is prevented from being deformed so as to expand when the contents are filled and sealed. It is an object of the present invention to provide a resin container exhibiting excellent reduced pressure absorption performance that can sufficiently absorb the decrease in internal pressure.

本発明に係る樹脂製容器は、口部、胴部、及び底部を備え、前記胴部の高さ方向に沿った所定の範囲内に、周方向に沿ってほぼ等角度間隔で配置され、かつ、長手方向に沿って容器外方に凸となるように湾曲する複数の柱部を形成するとともに、隣接する前記柱部間に形成される面のほぼ中央に、容器内方に凸となるように交わる二つの面からなる溝部を形成した構成としてある。   The resin container according to the present invention includes a mouth portion, a body portion, and a bottom portion, and is disposed within a predetermined range along the height direction of the body portion at substantially equal angular intervals along the circumferential direction, and Forming a plurality of pillars that are curved outwardly along the longitudinal direction, and projecting inwardly at the center of the surface formed between the adjacent pillars. It is set as the structure which formed the groove part which consists of two surfaces which cross | intersect.

上記構成とした本発明に係る樹脂製容器は、内容物を充填する際に膨らむように変形してしまうのを抑止するのに十分な剛性を確保した上で、柱部と溝部とが形成された範囲が、全体的に均一に容積を減ずるように大きく変形して、優れた減圧吸収性能を発揮する。   The resin container according to the present invention configured as described above is provided with a column part and a groove part after ensuring sufficient rigidity to prevent the resin container from deforming so as to swell when filled with contents. The range is greatly deformed so as to reduce the volume evenly as a whole, and exhibits excellent vacuum absorption performance.

以下、本発明の好ましい実施形態について、図面を参照しつつ説明する。   Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

［第一実施形態］
まず、本発明に係る樹脂製容器の第一実施形態について説明する。
なお、図１は、本実施形態に係る樹脂製容器の一例を示す説明図であり、図１（ａ）は、正面図、図１（ｂ）は、図１（ａ）のＡ−Ａ切断面図である。 [First embodiment]
First, a first embodiment of a resin container according to the present invention will be described.
FIG. 1 is an explanatory view showing an example of a resin container according to the present embodiment, FIG. 1 (a) is a front view, and FIG. 1 (b) is an AA cut of FIG. 1 (a). FIG.

図１に示す容器１は、口部２、胴部３、及び底部４を備えている。口部２は、円筒状とされ、この種の容器に一般に形成されるネックリング２１と、ネックリング２１の直下でほぼ同一径となっている部分を含む。このような口部２の開口端側の側面には、図示しない蓋体を取り付けるためのねじ山が、蓋体取り付け手段として設けられており、内容物を充填した後に、口部２に蓋体を取り付けることによって、容器１内を密封できるようになっている。   A container 1 shown in FIG. 1 includes a mouth part 2, a body part 3, and a bottom part 4. The mouth portion 2 has a cylindrical shape, and includes a neck ring 21 that is generally formed in this type of container, and a portion that has almost the same diameter immediately below the neck ring 21. A screw thread for attaching a lid (not shown) is provided as a lid attachment means on the side surface on the opening end side of the mouth portion 2, and after filling the contents, the lid body is attached to the mouth portion 2. By attaching the, the inside of the container 1 can be sealed.

また、胴部３の高さ方向ほぼ中央には、当該部位を絞り込んでなるウェスト部３３が設けられている。このようなウェスト部３３を設けることによって、胴部３は、上側胴部３１と下側胴部３２とに分けられており、上側胴部３１は、その高さ方向上端側が口部２に連接し、下側胴部３２は、その高さ方向下端側が底部４に連接している。
ここで、高さ方向とは、口部２を上にして容器１を水平面に置いたときに、水平面に直交する方向に沿った方向をいうものとする。 Further, a waist portion 33 is provided at the center of the body portion 3 in the height direction so as to narrow down the portion. By providing such a waist part 33, the body part 3 is divided into an upper body part 31 and a lower body part 32, and the upper body part 31 is connected to the mouth part 2 at the upper end in the height direction. The lower body portion 32 is connected to the bottom portion 4 at the lower end in the height direction.
Here, the height direction means a direction along a direction orthogonal to the horizontal plane when the container 1 is placed on the horizontal plane with the mouth portion 2 facing up.

図１に示す容器１は、容量５００ｍｌ程度の円柱状の容器に本発明を適用した例であり、高さＨが約２１５ｍｍ、口部２の外径φＤが約２５ｍｍ、最大胴径φＤｍａｘが約６８．５mmとなるように設計されている。   A container 1 shown in FIG. 1 is an example in which the present invention is applied to a cylindrical container having a capacity of about 500 ml. The height H is about 215 mm, the outer diameter φD of the mouth 2 is about 25 mm, and the maximum trunk diameter φDmax is about It is designed to be 68.5 mm.

このような容器１において、上側胴部３１は、口部２側から高さ方向に沿って同心状に拡径し、最大胴径φＤｍａｘに達した後に縮径するように形成されている。上側胴部３１の最大胴径φＤｍａｘとなる部位は、上側胴部３１の高さ方向ほぼ中央に位置させてあり、図１（ｂ）に示す切断面は、この最大胴径φＤｍａｘとなる部位の切断面である。   In such a container 1, the upper body part 31 is formed so as to expand concentrically along the height direction from the mouth part 2 side, and to reduce the diameter after reaching the maximum body diameter φDmax. The part of the upper body part 31 having the maximum body diameter φDmax is located at the center of the upper body part 31 in the height direction, and the cut surface shown in FIG. It is a cut surface.

一方、下側胴部３２は、ウェスト部３３側と底部４側の一部を除いて、ほぼ同一径の円筒状に形成されている。下側胴部３２についても、上側胴部３１と同様に、その胴径を高さ方向に沿って変化させてもよいが、ほぼ同一径で円筒状に形成された部位の直径を最大胴径φＤｍａｘとなるように設計することで、多数の容器１を整列させたときに、最大胴径φＤｍａｘとされた円筒状の部位により隣り合う容器１どうしを接触させて、安定に整列させることができるので好ましい。   On the other hand, the lower body portion 32 is formed in a cylindrical shape having substantially the same diameter except for a portion on the waist portion 33 side and the bottom portion 4 side. As with the upper body portion 31, the lower body portion 32 may also have its body diameter changed along the height direction. However, the diameter of the portion formed in a cylindrical shape with substantially the same diameter is the maximum body diameter. By designing so as to be φDmax, when a large number of containers 1 are aligned, adjacent containers 1 can be brought into contact with each other by a cylindrical portion having the maximum body diameter φDmax, and can be stably aligned. Therefore, it is preferable.

以上、本実施形態に係る容器１の概略を説明したが、本実施形態において、容器１の上側胴部３１には、その周方向に沿って、ほぼ等角度間隔で配置された複数（図示する例では八つ）の柱部５が形成されている。この柱部５は、上側胴部３１の外形形状に倣って、容器外方に凸となるように長手方向に沿って湾曲させてあるが、その曲率半径は、５０〜１０００mmの範囲で設定するのが好ましく、８０〜１５０ｍｍの範囲で設定するのがより好ましい。この曲率半径は、ほぼ一定となるように設定してもよいし、その他にも、複数の曲率半径の組み合わせとなるように設定してもよく、例えば、最大胴径φＤｍａｘとなる部位を境に異なる曲率半径で繋げてもよい。また、柱部５の幅Ｗは、高さ方向に沿って一定としてもよく、高さ方向に沿って変化させてもよいが、通常は、０〜４mmの範囲で形成するのが好ましい。このとき、柱部５の幅Wが０ｍｍの場合、柱部５は稜線状となる。   As described above, the outline of the container 1 according to the present embodiment has been described. In the present embodiment, the upper body portion 31 of the container 1 includes a plurality of (illustrated) arranged at substantially equal angular intervals along the circumferential direction. In the example, eight column parts 5 are formed. The column portion 5 is curved along the longitudinal direction so as to protrude outward from the container, following the outer shape of the upper body portion 31, and the radius of curvature is set in the range of 50 to 1000 mm. Is preferable, and it is more preferable to set in the range of 80 to 150 mm. The curvature radius may be set to be substantially constant, or may be set to be a combination of a plurality of curvature radii, for example, at the portion where the maximum body diameter φDmax is a boundary. You may connect with a different curvature radius. The width W of the column portion 5 may be constant along the height direction or may be changed along the height direction, but it is usually preferable to form the width W in the range of 0 to 4 mm. At this time, when the width W of the column portion 5 is 0 mm, the column portion 5 has a ridge shape.

そして、隣接する各柱部５間に形成される面のほぼ中央には、容器内方に凸となるように交わる二つの面６１，６１からなる溝部６が形成されている。この溝部６を形成する二つの面６１，６１の交わる角度θは、９０〜１５０°とするのが好ましく、１２０〜１５０°とするのがより好ましい。また、溝部６を形成する二つの面６１，６１の交線６０は、柱部５に倣って湾曲させるのが好ましく、その曲率半径は、柱部５の曲率半径とほぼ等しくなるようにするのが好ましい。
なお、後述するように減圧吸収面として機能する各柱部５間に形成される面、及び溝部６を形成する各面６１，６１は、なだらかに湾曲する面であるのが好ましい。すなわち、これらの面には、凹凸形状を設けないのが好ましい。また、溝部６の深さや、各柱部５間に形成される面、及び溝部６を形成する各面６１，６１のそれぞれの幅は、容器１の高さ方向上方、又は下方、或いは上下方向の両方に向かって減少するのが好ましく、このとき、胴部３の胴径の変化に対応させて減少させるのがより好ましい。 And the groove part 6 which consists of the two surfaces 61 and 61 which cross | intersect so that it may become convex in a container is formed in the approximate center of the surface formed between each adjacent pillar part 5. As shown in FIG. An angle θ between the two surfaces 61 and 61 forming the groove 6 is preferably 90 to 150 °, and more preferably 120 to 150 °. Moreover, it is preferable that the intersection line 60 of the two surfaces 61 and 61 forming the groove portion 6 is curved along the column portion 5, and the curvature radius thereof is substantially equal to the curvature radius of the column portion 5. Is preferred.
As will be described later, the surfaces formed between the column portions 5 functioning as the reduced pressure absorption surfaces and the surfaces 61 and 61 forming the groove portions 6 are preferably curved surfaces. That is, it is preferable that these surfaces are not provided with an uneven shape. Moreover, the depth of the groove part 6, the surface formed between each pillar part 5, and each width | variety of each surface 61 and 61 which forms the groove part 6 are the height direction upper direction of the container 1, or the downward direction, or an up-down direction. In this case, it is preferable to decrease in accordance with the change in the body diameter of the body portion 3.

本実施形態では、上記のような柱部５と溝部６とを上側胴部３１に形成することで、内容物を充填する際に容器１が膨らむように変形してしまうのを抑止するのに十分な剛性を確保している。その上で、内容物を充填、密封した後に冷却されて容器内の圧力が減少すると、溝部６が案内となって、図１(ｂ)中矢印で示すように、各柱部５間の面が容器１の中心に向かって均等に引き寄せられるように変形し、容器１の不定形な形状変化を防止することができる。   In this embodiment, by forming the column part 5 and the groove part 6 as described above in the upper body part 31, it is possible to prevent the container 1 from being deformed so as to swell when the contents are filled. Sufficient rigidity is secured. After that, when the contents are filled and sealed and cooled down and the pressure in the container is reduced, the groove 6 serves as a guide, and as shown by the arrows in FIG. Can be deformed so as to be drawn evenly toward the center of the container 1, and an irregular shape change of the container 1 can be prevented.

しかも、柱部５間の面が容器内に引き寄せられる際には、溝部６を形成する二つの面６１，６１のなす角度θが徐々に小さくなっていくように変形して減圧を吸収し、さらに減圧吸収が進むと、このような溝部６の変形につられて、図２に示すように柱部５も容器内方に向かって引き寄せられていくといように、上側胴部３１の全体を大きく、かつ、均一に変形させることができる。そして、このようにして柱部５が容器内方に引き寄せられていくにあたり、柱部５は、長手方向に沿って湾曲した形状が徐々に直線状となるように変形していくことになるが、少なくとも柱部５が直線状になるまでの間は、座屈などによる形状破綻を生じることもない。   In addition, when the surface between the column portions 5 is drawn into the container, the angle θ formed by the two surfaces 61 and 61 forming the groove portion 6 is deformed so as to gradually decrease to absorb the reduced pressure, When the vacuum absorption further proceeds, the entire upper body 31 is enlarged so that the column part 5 is also drawn toward the inside of the container as shown in FIG. And can be uniformly deformed. As the column part 5 is drawn toward the inside of the container in this way, the column part 5 is deformed so that the shape curved along the longitudinal direction becomes gradually linear. The shape failure due to buckling or the like does not occur at least until the column portion 5 becomes linear.

ここで、図２は、上側胴部３１が変形する前後の状態の一例を概念的に示す説明図であり、図１（ａ）に示す容器１を、対向する二つの柱部５を含む平面で切り取った縦切断面に相当する。図２において、上側胴部３１は、図２（ａ）に示す状態から、図２（ｂ）に示す状態へと変形して減圧を吸収する。   Here, FIG. 2 is explanatory drawing which shows notionally an example of the state before and behind the upper trunk | drum 31 deform | transforming, and is the plane containing the two pillar parts 5 which oppose the container 1 shown to Fig.1 (a). Corresponds to the vertical cut surface cut out at. In FIG. 2, the upper body part 31 is deformed from the state shown in FIG. 2A to the state shown in FIG.

このように、本実施形態の容器１は、内容物を充填する際の変形を抑止した上で、内圧減少時には、上側胴部３１が、全体的に均一に容積を減ずるように大きく変形して、優れた減圧吸収性能を発揮するようになる。
なお、本実施形態では、主にデザイン上の理由から、下側胴部３２の外観を、上側胴部３１の外観に似せているが、下側胴部３２には、従来の減圧吸収構造を補助的に適用してもよい。また、上側胴部３１が変形することによって要求される減圧吸収性能が発揮できれば、下側胴部３２に減圧吸収構造を設ける必要は特にない。 As described above, the container 1 of the present embodiment is largely deformed so that the volume of the upper body portion 31 is reduced uniformly as a whole when the internal pressure is reduced while suppressing deformation when filling the contents. , Will exhibit excellent vacuum absorption performance.
In the present embodiment, the appearance of the lower body portion 32 is made similar to the appearance of the upper body portion 31 mainly for design reasons, but the lower body portion 32 has a conventional reduced pressure absorption structure. You may apply supplementarily. Moreover, if the decompression absorption performance requested | required when the upper side trunk | drum 31 deform | transforms can be exhibited, it is not necessary to provide the decompression absorption structure in the lower trunk | drum 32 in particular.

以上のような本実施形態における容器１は、例えば、公知の射出成形や押出成形により製造された、熱可塑性樹脂からなる有底筒状のプリフォームを二軸延伸ブロー成形するなどして所定形状に成形することができる。
熱可塑性樹脂としては、延伸ブロー成形が可能であれば、任意の樹脂を使用することができる。具体的には、ポリエチレンテレフタレート，ポリブチレンテレフタレート，ポリエチレンナフタレート，ポリカーボネート，ポリアリレート，ポリ乳酸又はこれらの共重合体などの熱可塑性ポリエステル，これらの樹脂、或は他の樹脂とブレンドされたものなどが好適である。特に、ポリエチレンテレフタレートなどのエチレンテレフタレート系熱可塑性ポリエステルが、好適に使用される。また、アクリロニトリル樹脂，ポリプロピレン，プロピレン−エチレン共重合体，ポリエチレンなども使用することができる。 The container 1 in the present embodiment as described above has a predetermined shape by, for example, biaxially stretching blow-molding a bottomed cylindrical preform made of a thermoplastic resin manufactured by known injection molding or extrusion molding. Can be molded.
As the thermoplastic resin, any resin can be used as long as stretch blow molding is possible. Specifically, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyarylate, polylactic acid or copolymers thereof, polyesters of these, or those blended with other resins, etc. Is preferred. In particular, an ethylene terephthalate thermoplastic polyester such as polyethylene terephthalate is preferably used. Further, acrylonitrile resin, polypropylene, propylene-ethylene copolymer, polyethylene and the like can be used.

[第二実施形態]
次に、本発明に係る樹脂製容器の第二実施形態について説明する。
なお、図３は、本実施形態に係る樹脂製容器の一例を示す説明図であり、図３（ａ）は、正面図、図３（ｂ）は、図３（ａ）のＢ−Ｂ切断面図である。 [Second Embodiment]
Next, a second embodiment of the resin container according to the present invention will be described.
FIG. 3 is an explanatory view showing an example of a resin container according to the present embodiment, FIG. 3 (a) is a front view, and FIG. 3 (b) is a BB cut of FIG. 3 (a). FIG.

図３に示す容器１は、容量１５０ｍｌ程度の円柱状の容器に本発明を適用した例であり、高さＨが約１３２ｍｍ、口部２の外径φＤが約２５ｍｍ、最大胴径φＤｍａｘが約５２mmとなるように設計されている。このような容器１において、胴部３の最大胴径φＤｍａｘとなる部位は、胴部３の高さ方向中央からやや下方に位置させてあり、図３（ｂ）に示す切断面は、この最大胴径φＤｍａｘとなる部位の切断面である。   The container 1 shown in FIG. 3 is an example in which the present invention is applied to a cylindrical container having a capacity of about 150 ml. The height H is about 132 mm, the outer diameter φD of the mouth 2 is about 25 mm, and the maximum trunk diameter φDmax is about It is designed to be 52 mm. In such a container 1, the part having the maximum body diameter φDmax of the body part 3 is located slightly below the center in the height direction of the body part 3, and the cut surface shown in FIG. This is a cut surface of a part having a body diameter φDmax.

前述した第一実施形態では、ウェスト部３３を設けることで、胴部３を上側胴部３１と下側胴部３２とに分けていたが、本実施形態の容器１は、第一実施形態の容器１の下側胴部３２を省略したものに相当する。   In 1st embodiment mentioned above, although the waist part 33 was provided, the trunk | drum 3 was divided into the upper trunk | drum 31 and the lower trunk | drum 32, However, The container 1 of this embodiment is the 1st embodiment. This corresponds to a case where the lower body 32 of the container 1 is omitted.

すなわち、本実施形態では、胴部３が、口部２の直下から高さ方向に沿って同心状に拡径し、最大胴径φＤｍａｘに達した後に縮径して底部４に連接するように形成されている。そして、胴部３の周方向に沿って、ほぼ等角度間隔で配置された複数（図示する例では八つ）の柱部５が、胴部３の外形形状に倣って、容器外方に凸となるように長手方向に沿って湾曲するようにして形成されており、隣接する各柱部５間に形成される面のほぼ中央には、容器内方に凸となるように交わる二つの面６１，６１からなる溝部６が形成されている。
なお、本実施形態は、以上の点で第一実施形態と異なるが、それ以外は第一実施形態と同様の構成を備えているので、他の構成についての詳細な説明は省略する。 That is, in the present embodiment, the trunk portion 3 is concentrically expanded from the position immediately below the mouth portion 2 along the height direction, and after reaching the maximum trunk diameter φDmax, the trunk portion 3 is reduced in diameter and connected to the bottom portion 4. Is formed. Then, a plurality of (eight in the illustrated example) column portions 5 that are arranged at substantially equal angular intervals along the circumferential direction of the barrel portion 3 protrude outward from the container along the outer shape of the barrel portion 3. Are formed so as to be curved along the longitudinal direction so that the two surfaces intersecting so as to be convex inward of the container are formed at substantially the center of the surfaces formed between the adjacent column portions 5. A groove 6 composed of 61 and 61 is formed.
Although the present embodiment is different from the first embodiment in the above points, the rest of the configuration is the same as that of the first embodiment, and detailed description of other configurations is omitted.

前述した特許文献１のような減圧吸収構造を採用する場合、容器の比較的容量が小さい容器にあっては、減圧吸収パネルの面積が小さくなってしまうため、十分な減圧吸収性能が得られ難い。そして、減圧吸収性能が不足して、個々の減圧吸収パネルに無理な変形が強いられると、全ての減圧吸収パネルが均等に変形せずに、不均一な形状に変形し易いという不都合がある。
これに対して、本実施形態の容器１は、前述した第一実施形態と同様の減圧吸収性能を発揮するものであり、内圧減少時には、胴部３が全体的に均一に容積を減ずるように大きく変形して、優れた減圧吸収性能を発揮する。このため、従来の減圧吸収構造における上記不都合を有効に回避することができる。このように、本願発明は、比較的小容量の容器に適用しても、優れた減圧吸収性能を発揮することができる。 When the reduced pressure absorption structure as described in Patent Document 1 is adopted, in a container having a relatively small capacity, the area of the reduced pressure absorption panel is reduced, so that it is difficult to obtain sufficient reduced pressure absorption performance. . If the vacuum absorbing performance is insufficient and the individual vacuum absorbing panels are forced to be deformed, all the vacuum absorbing panels are not uniformly deformed and are liable to be deformed into an uneven shape.
On the other hand, the container 1 of the present embodiment exhibits a reduced pressure absorption performance similar to that of the first embodiment described above, and the volume of the body portion 3 is reduced uniformly throughout when the internal pressure is reduced. Deforms greatly and exhibits excellent vacuum absorption performance. For this reason, the inconveniences in the conventional reduced pressure absorption structure can be effectively avoided. Thus, even when the present invention is applied to a relatively small-capacity container, it can exhibit excellent reduced pressure absorption performance.

[第三実施形態]
次に、本発明に係る樹脂製容器の第三実施形態について説明する。
なお、図４は、本実施形態に係る樹脂製容器の一例を示す説明図であり、図４（ａ）は、正面図、図４（ｂ）は、図４（ａ）のＣ−Ｃ切断面図である。 [Third embodiment]
Next, a third embodiment of the resin container according to the present invention will be described.
FIG. 4 is an explanatory view showing an example of a resin container according to the present embodiment, FIG. 4 (a) is a front view, and FIG. 4 (b) is a CC cut of FIG. 4 (a). FIG.

図４に示す容器１は、容量３５０ｍｌ程度の四角柱状の容器に本発明を適用した例であり、高さＨが約２０５．６ｍｍ、口部２の外径φＤが約２５ｍｍ、最大胴径（対角方向に対向する柱部５間の最大幅）φＤｍａｘが約６４mmとなるように設計されている。このような容器１において、胴部３の最大胴径φＤｍａｘとなる部位は、上側胴部３１の高さ方向ほぼ中央に位置させてあり、図４（ｂ）に示す切断面は、この最大胴径φＤｍａｘとなる部位の切断面である。   A container 1 shown in FIG. 4 is an example in which the present invention is applied to a square columnar container having a capacity of about 350 ml. The height H is about 205.6 mm, the outer diameter φD of the mouth 2 is about 25 mm, and the maximum trunk diameter ( The maximum width (φDmax) between the diagonally opposed column portions 5 is designed to be about 64 mm. In such a container 1, the portion having the maximum body diameter φDmax of the body portion 3 is located at the substantially center of the upper body portion 31 in the height direction, and the cut surface shown in FIG. It is a cut surface of a part which becomes diameter φDmax.

前述した第一実施形態では、円柱状の容器に本発明を適用した例を示したが、本発明は、図４に示すように、四角柱状の容器にも適用することができる。   Although the example which applied this invention to the cylindrical container was shown in 1st embodiment mentioned above, this invention is applicable also to a square columnar container as shown in FIG.

すなわち、前述した第一実施形態では、八つの柱部５が形成された例を図示したが、本実施形態では、胴部３の周方向に沿って、ほぼ等角度間隔で配置される四つの柱部５が、胴部３の角部に位置している。図４に示す容器１においても、第一実施形態と同様に、上側胴部３１が、口部２の直下から高さ方向に沿って同心状に拡径し、最大胴径φＤｍａｘに達した後に縮径するように形成されており、四角柱状の容器１に適用した以外は、第一実施形態と同様の構成を備えているので、他の構成についての詳細な説明は省略する。   That is, in the first embodiment described above, an example in which the eight column portions 5 are formed is illustrated. However, in the present embodiment, four columns arranged at substantially equal angular intervals along the circumferential direction of the trunk portion 3 are illustrated. The column part 5 is located at the corner of the trunk part 3. Also in the container 1 shown in FIG. 4, as in the first embodiment, after the upper body portion 31 expands concentrically along the height direction from directly below the mouth portion 2 and reaches the maximum body diameter φDmax. Since it is formed to have a reduced diameter and has the same configuration as that of the first embodiment except that it is applied to the square columnar container 1, detailed description of other configurations is omitted.

以上、本発明について、好ましい実施形態を示して説明したが、本発明は、前述した実施形態にのみ限定されるものではなく、本発明の趣旨を損なわない範囲で種々の変更実施が可能であることは言うまでもない。   While the present invention has been described with reference to the preferred embodiment, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. Needless to say.

例えば、前述した第一及び第二実施形態では、周方向に沿って八つの柱部５を形成した例を示し、前述した第三実施形態では、周方向に沿って四つの柱部５を形成した例を示したが、容器１の周方向に沿って形成する柱部５の数は、これに限られない。
ただし、多数の容器１を縦横に安定に整列させるには、八つ又は四つの柱部５を周方向に沿って配置させ、各柱部５間に形成される面が八面又は四面となるようにして、縦横に隣接する容器１どうしが面で接するようにするのが好ましい。 For example, in the first and second embodiments described above, an example in which eight column parts 5 are formed along the circumferential direction is shown, and in the third embodiment described above, four column parts 5 are formed along the circumferential direction. Although the example which did was shown, the number of the pillar parts 5 formed along the circumferential direction of the container 1 is not restricted to this.
However, in order to stably align a large number of containers 1 vertically and horizontally, eight or four column portions 5 are arranged along the circumferential direction, and the surfaces formed between the column portions 5 are eight or four surfaces. Thus, it is preferable that the containers 1 adjacent to each other in the vertical and horizontal directions are in contact with each other.

また、前述した各実施形態では、柱部５の長手方向が高さ方向とほぼ平行となるようにしたが、必要に応じて、柱部５の長手方向が高さ方向に対して傾斜するようにしてもよい。   In each of the above-described embodiments, the longitudinal direction of the column part 5 is substantially parallel to the height direction. However, the longitudinal direction of the column part 5 is inclined with respect to the height direction as necessary. It may be.

本発明に係る樹脂製容器は、ボトル状に成形される種々の合成樹脂製の容器に適用できる。   The resin container according to the present invention can be applied to various synthetic resin containers formed into a bottle shape.

本発明に係る樹脂製容器の第一実施形態を示す説明図である。It is explanatory drawing which shows 1st embodiment of the resin-made containers which concern on this invention. 第一実施形態の容器が変形する前後の状態の一例を示す説明図である。It is explanatory drawing which shows an example of the state before and after the container of 1st embodiment deform | transforms. 本発明に係る樹脂製容器の第二実施形態を示す説明図である。It is explanatory drawing which shows 2nd embodiment of the resin-made containers which concern on this invention. 本発明に係る樹脂製容器の第三実施形態を示す説明図である。It is explanatory drawing which shows 3rd embodiment of the resin-made containers which concern on this invention.

符号の説明Explanation of symbols

１ 容器
２ 口部
３ 胴部
３１ 上側胴部
３２ 下側胴部
３３ ウェスト部
４ 底部
５ 柱部
６ 溝部
６０ 交線
６１ 面
φＤｍａｘ 最大胴径 DESCRIPTION OF SYMBOLS 1 Container 2 Mouth part 3 Torso part 31 Upper trunk | drum 32 Lower trunk | drum 33 Waist part 4 Bottom part 5 Pillar part 6 Groove part 60 Intersection 61 surface φDmax Maximum trunk diameter

Claims (6)

口部、胴部、及び底部を備え、
前記胴部の高さ方向に沿った所定の範囲内に、
周方向に沿ってほぼ等角度間隔で配置され、かつ、長手方向に沿って容器外方に凸となるように湾曲する複数の柱部を形成するとともに、
隣接する前記柱部間に形成される面のほぼ中央に、容器内方に凸となるように交わる二つの面からなる溝部を形成したことを特徴とする樹脂製容器。 With mouth, torso, and bottom,
Within a predetermined range along the height direction of the trunk,
While forming a plurality of pillars that are arranged at substantially equal angular intervals along the circumferential direction and are curved so as to be convex outward in the longitudinal direction,
A resin container characterized in that a groove portion composed of two surfaces intersecting so as to be convex toward the inside of the container is formed at substantially the center of the surface formed between the adjacent column portions. 前記溝部を形成する二つの面の交線を、前記柱部に倣って湾曲させた請求項１に記載の樹脂製容器。   The resin container according to claim 1, wherein an intersection line of two surfaces forming the groove is curved along the pillar. 前記柱部の曲率半径が、５０〜１０００mmである請求項１又は２のいずれか１項に記載の樹脂製容器。   The resin container according to any one of claims 1 and 2, wherein a radius of curvature of the column portion is 50 to 1000 mm. 前記溝部を形成する二つの面の交わる角度が、９０〜１５０°である請求項１〜３のいずれか１項に記載の樹脂製容器。   The resin container according to any one of claims 1 to 3, wherein an angle between two surfaces forming the groove portion is 90 to 150 °. 前記胴部が、前記口部側から高さ方向に沿って拡径し、最大胴径に達した後に縮径する範囲を有し、
当該範囲内に、前記柱部と前記溝部とを形成した請求項１〜４のいずれか１項に記載の樹脂製容器。 The body portion has a range that expands along the height direction from the mouth side and contracts after reaching the maximum body diameter,
The resin container according to any one of claims 1 to 4, wherein the column part and the groove part are formed within the range. 前記胴部が、前記口部に連接する上側胴部と、前記底部に連接する下側胴部とを有し、
前記上側胴部に、前記柱部と前記溝部とを形成した請求項１〜５のいずれか１項に記載の樹脂製容器。 The trunk includes an upper trunk connected to the mouth; and a lower trunk connected to the bottom;
The resin container according to any one of claims 1 to 5, wherein the column part and the groove part are formed in the upper body part.
JP2007338937A 2007-12-28 2007-12-28 Resin container Pending JP2009154963A (en)

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JP2011031906A (en) * 2009-07-30 2011-02-17 Yoshino Kogyosho Co Ltd Synthetic-resin square bottle
JP2011031925A (en) * 2009-07-31 2011-02-17 Yoshino Kogyosho Co Ltd Synthetic resin-made square bottle
JP2011213394A (en) * 2010-03-31 2011-10-27 Yoshino Kogyosho Co Ltd Square shape bottle made of synthetic resin
JP2012076793A (en) * 2010-10-01 2012-04-19 Mikasa Sangyo Kk Synthetic resin container
US20120219738A1 (en) * 2009-09-04 2012-08-30 Sidel Participations Container having grooved facets
JP2014151939A (en) * 2013-02-07 2014-08-25 Toyo Seikan Kaisha Ltd Synthetic resin bottle
JP2016101975A (en) * 2014-11-28 2016-06-02 株式会社吉野工業所 Synthetic resin bottle
JP2016101976A (en) * 2014-11-28 2016-06-02 株式会社吉野工業所 Synthetic resin bottle
JP2017210266A (en) * 2016-05-26 2017-11-30 株式会社吉野工業所 Synthetic resin blow molded bottle
JP2017214117A (en) * 2016-05-31 2017-12-07 株式会社吉野工業所 Blow molded container
JP2018047936A (en) * 2016-09-23 2018-03-29 株式会社吉野工業所 Synthetic resin container
JP2018104046A (en) * 2016-12-27 2018-07-05 サントリーホールディングス株式会社 Resin container
JP2018115013A (en) * 2017-01-19 2018-07-26 三笠産業株式会社 container
JP2020196546A (en) * 2020-09-09 2020-12-10 大日本印刷株式会社 Plastic bottle and filled object
JP2021120276A (en) * 2020-01-30 2021-08-19 株式会社吉野工業所 Bottle

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JP2006103736A (en) * 2004-10-04 2006-04-20 Toyo Seikan Kaisha Ltd Synthetic resin-made container
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JPH08301260A (en) * 1995-05-08 1996-11-19 Pepsico Inc Plastic container
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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011031906A (en) * 2009-07-30 2011-02-17 Yoshino Kogyosho Co Ltd Synthetic-resin square bottle
JP2011031925A (en) * 2009-07-31 2011-02-17 Yoshino Kogyosho Co Ltd Synthetic resin-made square bottle
US20120219738A1 (en) * 2009-09-04 2012-08-30 Sidel Participations Container having grooved facets
JP2011213394A (en) * 2010-03-31 2011-10-27 Yoshino Kogyosho Co Ltd Square shape bottle made of synthetic resin
JP2012076793A (en) * 2010-10-01 2012-04-19 Mikasa Sangyo Kk Synthetic resin container
JP2014151939A (en) * 2013-02-07 2014-08-25 Toyo Seikan Kaisha Ltd Synthetic resin bottle
JP2016101975A (en) * 2014-11-28 2016-06-02 株式会社吉野工業所 Synthetic resin bottle
JP2016101976A (en) * 2014-11-28 2016-06-02 株式会社吉野工業所 Synthetic resin bottle
JP2017210266A (en) * 2016-05-26 2017-11-30 株式会社吉野工業所 Synthetic resin blow molded bottle
JP2017214117A (en) * 2016-05-31 2017-12-07 株式会社吉野工業所 Blow molded container
JP2018047936A (en) * 2016-09-23 2018-03-29 株式会社吉野工業所 Synthetic resin container
JP2018104046A (en) * 2016-12-27 2018-07-05 サントリーホールディングス株式会社 Resin container
JP6999265B2 (en) 2016-12-27 2022-01-18 サントリーホールディングス株式会社 Resin container
JP2018115013A (en) * 2017-01-19 2018-07-26 三笠産業株式会社 container
JP2021120276A (en) * 2020-01-30 2021-08-19 株式会社吉野工業所 Bottle
JP2020196546A (en) * 2020-09-09 2020-12-10 大日本印刷株式会社 Plastic bottle and filled object
JP7006743B2 (en) 2020-09-09 2022-01-24 大日本印刷株式会社 Plastic bottles and fillers

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