JP6415347B2 - Plastic container - Google Patents

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JP6415347B2
JP6415347B2 JP2015027239A JP2015027239A JP6415347B2 JP 6415347 B2 JP6415347 B2 JP 6415347B2 JP 2015027239 A JP2015027239 A JP 2015027239A JP 2015027239 A JP2015027239 A JP 2015027239A JP 6415347 B2 JP6415347 B2 JP 6415347B2
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groove
rib
annular
synthetic resin
chamfered corner
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JP2016150746A (en
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大樹 安川
大樹 安川
剛志 内山
剛志 内山
高規 岡部
高規 岡部
康彦 赤沼
康彦 赤沼
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Suntory Holdings Ltd
Toyo Seikan Kaisha Ltd
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Suntory Holdings Ltd
Toyo Seikan Kaisha Ltd
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Description

本発明は、高い軸荷重強度を発揮することができる合成樹脂製容器に関する。   The present invention relates to a synthetic resin container capable of exhibiting high axial load strength.

従来、ポリエチレンテレフタレートなどの熱可塑性樹脂を用いて有底筒状のプリフォームを形成し、次いで、このプリフォームを二軸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容器が、各種飲料品を内容物とする飲料用容器として広い分野で一般的に利用されている。   Conventionally, various types of synthetic resin containers are formed by forming a bottomed cylindrical preform using a thermoplastic resin such as polyethylene terephthalate, and then molding the preform into a bottle shape by biaxial stretch blow molding or the like. It is generally used in a wide field as a beverage container containing a beverage.

そして、この種の合成樹脂製容器にあっては、従前より、その軽量化や、使用樹脂量の削減による低コスト化のために、可能な限り容器を薄肉に成形する試みがなされており、近年に至っては、内容物を加熱殺菌して充填する従来のホット充填に代えて、無菌状態で内容物を充填する、いわゆる無菌充填が着目されるようになってきた（例えば、特許文献１参照）。
内容物の充填手段として無菌充填を採用すれば、ホット充填の場合のような耐熱性が容器に要求されないため、より一層の軽量化、薄肉化を図ることが可能である。 And, in this type of synthetic resin container, attempts have been made to make the container as thin as possible in order to reduce its weight and cost by reducing the amount of resin used, In recent years, so-called aseptic filling, in which the contents are filled in an aseptic state, has been attracting attention instead of the conventional hot filling in which the contents are sterilized by heating (see, for example, Patent Document 1). ).
If aseptic filling is employed as the filling means for the contents, the container is not required to have heat resistance as in the case of hot filling, and therefore it is possible to further reduce the weight and thickness.

特開２０１１−２３０８１５号公報JP 2011-230815 A

しかしながら、無菌充填を採用して容器の軽量化、薄肉化を図っても、その分、軸方向の圧縮強度（軸荷重強度）が低下するなどの強度面での問題が懸念される。このため、容器の軽量化、薄肉化を図るとともに、その軸方向から加わる荷重に対して変形し難くした容器が種々提案されているが、益々厳しくなってきている今日の容器の薄肉化の要求に応えるためには、改善すべき余地が未だ残されていた。   However, even if aseptic filling is employed to reduce the weight and thickness of the container, there are concerns about strength problems such as a decrease in axial compressive strength (axial load strength). For this reason, various types of containers have been proposed that reduce the weight and thickness of the container and make it difficult to deform with respect to the load applied from the axial direction. However, the demand for thinner containers today is becoming increasingly severe. There was still room for improvement in order to meet the requirements.

本発明は、上記の事情に鑑みなされたものであり、容器の軽量化、薄肉化の要求の下、高い軸荷重強度を発揮することができる合成樹脂製容器を提供することを目的とする。   The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a synthetic resin container capable of exhibiting high axial load strength under the demand for weight reduction and thinning of the container.

本発明に係る合成樹脂製容器は、口部、肩部、胴部、及び底部を備え、前記胴部が、側面部と、横断面が円弧状となるように面取りされた面取り隅部とを有する角筒状に形成されたボトル状の合成樹脂製容器であって、前記胴部に、前記側面部における溝深さよりも、前記面取り隅部における溝深さが深くなるよう形成された環状凹溝からなるクッション部を設け、前記面取り隅部の両端縁側に、高さ方向に沿って延在する縦溝状の縦リブを前記環状凹溝と離間させて形成するとともに、前記面取り隅部における前記縦リブの間に、周方向に沿って延在し、かつ溝深さが一定の横溝状の横リブを前記縦リブと離間させて形成した構成としてある。   A synthetic resin container according to the present invention includes a mouth, a shoulder, a body, and a bottom, and the body includes a side surface and a chamfered corner that is chamfered so that the cross section is arcuate. A bottle-shaped synthetic resin container formed into a rectangular tube shape having an annular recess formed in the barrel so that the groove depth in the chamfered corner is deeper than the groove depth in the side surface. A cushion portion made of a groove is provided, and longitudinal groove-like vertical ribs extending along the height direction are formed on both edge sides of the chamfered corner portion so as to be separated from the annular concave groove, and in the chamfered corner portion A horizontal groove-like horizontal rib extending along the circumferential direction and having a constant groove depth is formed between the vertical ribs so as to be separated from the vertical rib.

本発明によれば、面取り隅部の変形を抑止しつつ、胴部に形成した環状凹溝がクッション部として機能して軸方向から加わる荷重を吸収することにより、高い軸荷重強度を発揮することができる。   According to the present invention, while suppressing the deformation of the chamfered corner, the annular groove formed in the body functions as a cushion portion and absorbs the load applied from the axial direction, thereby exhibiting high axial load strength. Can do.

本発明の実施形態に係る合成樹脂製容器の概略を示す正面図である。It is a front view showing an outline of a synthetic resin container according to an embodiment of the present invention. 本発明の実施形態に係る合成樹脂製容器の概略を示す平面図である。It is a top view which shows the outline of the synthetic resin containers which concern on embodiment of this invention. 図１のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 図１のＢ−Ｂ断面図である。It is BB sectional drawing of FIG. 図２のＣ−Ｃ断面図である。It is CC sectional drawing of FIG. 図２のＤ−Ｄ断面図である。It is DD sectional drawing of FIG. 図５において二点鎖線で囲む部分の拡大図である。FIG. 6 is an enlarged view of a portion surrounded by a two-dot chain line in FIG. 5. 図６において二点鎖線で囲む部分の拡大図である。It is an enlarged view of the part enclosed with a dashed-two dotted line in FIG. 図１のＥ−Ｅ断面図である。It is EE sectional drawing of FIG.

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.

本実施形態において、容器１は、例えば、熱可塑性樹脂を使用して射出成形や圧縮成形などにより有底筒状のプリフォームを成形し、このプリフォームを二軸延伸ブロー成形により、図１などに示すような、口部２、肩部３、胴部４、及び底部５を備えた所定の容器形状に成形することによって製造される。   In the present embodiment, the container 1 is formed, for example, by using a thermoplastic resin to form a bottomed cylindrical preform by injection molding, compression molding, or the like. As shown in FIG. 4, the container is manufactured by molding into a predetermined container shape having a mouth portion 2, a shoulder portion 3, a trunk portion 4, and a bottom portion 5.

このような容器１を製造するにあたり、使用する熱可塑性樹脂としては、上記のようにして容器１を成形することが可能な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，これらの樹脂あるい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。   In manufacturing such a container 1, as a thermoplastic resin to be used, any resin capable of forming the container 1 as described above can be used. Specifically, thermoplastic polyesters such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyarylate, polylactic acid or copolymers thereof, those blended with these resins or other resins are suitable. It is. 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.

口部２は、図示しない蓋体を取り付けるためのねじ部２１が形成された円筒状の部位である。かかる口部２は、この種の容器に一般に形成されるサポートリング２２の直下でほぼ同一径となっている部分を含み、胴部４に向かって拡径する角錐台状に形成された肩部３に連接している。   The mouth portion 2 is a cylindrical portion in which a screw portion 21 for attaching a lid (not shown) is formed. The mouth portion 2 includes a portion having substantially the same diameter immediately below a support ring 22 generally formed in this type of container, and a shoulder portion formed in a truncated pyramid shape whose diameter increases toward the body portion 4. 3 is connected.

肩部３の下端側に位置する胴部４は、容器１の高さ方向の大半を占める角筒状に形成された部位であり、高さ方向に直交する横断面における隅部が円弧状となるように面取りされている（図２及び図３参照）。これにより、胴部４は、対向する二組の側面部４１と、各側面部４１の間に位置する面取り隅部４２とを有する角筒状に形成され、容器１は、いわゆる角形ボトル状の容器形状とされている。
図１に示す容器１は、全高が約２０６ｍｍ、対向する側面部４１間の距離が約６０ｍｍとされた容量５００ｍＬの角形ボトル状容器としてある。 The body part 4 located on the lower end side of the shoulder part 3 is a part formed in a rectangular tube shape that occupies most of the height direction of the container 1, and the corner part in the cross section orthogonal to the height direction is an arc shape. It is chamfered so that it becomes (refer FIG.2 and FIG.3). Thereby, the trunk | drum 4 is formed in the square cylinder shape which has the two sets of side parts 41 which oppose, and the chamfering corner part 42 located between each side part 41, and the container 1 is what is called a square bottle shape. It is a container shape.
The container 1 shown in FIG. 1 is a rectangular bottle-shaped container having a capacity of 500 mL, having an overall height of about 206 mm and a distance between opposing side surface parts 41 of about 60 mm.

ここで、高さ方向とは、口部２を上にして容器１を水平面に正立させたときに、水平面に直交する方向をいうものとし、この状態で容器１の上下左右及び縦横の方向を規定するものとする。   Here, the height direction means a direction orthogonal to the horizontal plane when the container 1 is erected on the horizontal plane with the mouth portion 2 up, and in this state, the vertical, horizontal, vertical and horizontal directions of the container 1 are defined. Shall be defined.

本実施形態では、胴部４の上端側から下端側に至る範囲に、三つの環状凹溝６が高さ方向に沿って略均等に配置されるように形成してある。かかる環状凹溝６は、溝底から所定の角度θで溝側面がＶ字状に立ち上るとともに、溝側面のなす角度θが周方向に沿って一定（又は略一定）となるように形成される（図４〜図６参照）。   In the present embodiment, the three annular grooves 6 are formed so as to be substantially evenly arranged along the height direction in the range from the upper end side to the lower end side of the body portion 4. The annular groove 6 is formed such that the groove side surface rises in a V shape from the groove bottom at a predetermined angle θ, and the angle θ formed by the groove side surface is constant (or substantially constant) along the circumferential direction. (See FIGS. 4 to 6).

さらに、環状凹溝６を形成するにあたっては、図３に示すように、胴部４の面取り隅部４２は、その横断面形状が所定の曲率半径の円弧状となるように面取りされているところ、これよりも面取り隅部４２における環状凹溝６の溝底の曲率半径が大きくなるようにしている。これにより、環状凹溝６は、側面部４１における溝深さよりも、面取り隅部４２における溝深さが深くなるよう形成されている。   Further, in forming the annular groove 6, as shown in FIG. 3, the chamfered corner portion 42 of the body portion 4 is chamfered so that the cross-sectional shape thereof becomes an arc shape with a predetermined radius of curvature. The radius of curvature of the groove bottom of the annular groove 6 in the chamfered corner 42 is made larger than this. Thereby, the annular concave groove 6 is formed so that the groove depth in the chamfered corner portion 42 is deeper than the groove depth in the side surface portion 41.

このような環状凹溝６は、容器１に軸方向から荷重が加わると、溝側面のなす角度が狭まるように弾性変形して、当該荷重を吸収するクッション部として機能する。環状凹溝６は、胴部４に少なくとも一つ設けられていればよく、その数は、要求される軸荷重強度に応じて適宜設定することができる。軸方向からの荷重をより良好に吸収できるようにするためには、環状凹溝６は複数設けるのが好ましく、胴部４の上端側と下端側のそれぞれに環状凹溝６を設けるとともに、これらの間に一又は複数の環状凹溝６を設け、これらの環状凹溝６のそれぞれを高さ方向に沿って均等（又は略均等）に配置するのがより好ましい。
また、軸方向からの荷重を良好に吸収する上で、環状凹溝６の溝側面のなす角度θは、４０〜６５°であるのが好ましい。
また、横断面における面取り隅部４２の曲率半径は、１５〜２１ｍｍであるのが好ましく、より好ましくは１７〜２１ｍｍである。面取り隅部４２における環状凹溝６の溝底の曲率半径は、２１．５〜２５．０ｍｍであるのが好ましく、より好ましくは２１．５〜２３．５ｍｍである。上記範囲に満たないと、容器１に軸方向から荷重が加わった際に、クッション部としての機能が十分に発揮されなくなってしまう虞があり、上記範囲を超えると、面取り隅部４２における環状凹溝６を所望の形状に賦形しにくくなってしまう虞がある。 When a load is applied to the container 1 from the axial direction, such an annular groove 6 functions as a cushion part that elastically deforms so that the angle formed by the groove side surface is narrowed and absorbs the load. It suffices that at least one annular groove 6 is provided in the body portion 4, and the number thereof can be appropriately set according to the required axial load strength. In order to better absorb the load from the axial direction, it is preferable to provide a plurality of annular grooves 6. The annular grooves 6 are provided on each of the upper end side and the lower end side of the body portion 4. It is more preferable to provide one or a plurality of annular grooves 6 between them, and to arrange each of these annular grooves 6 equally (or substantially equally) along the height direction.
Moreover, in order to absorb the load from an axial direction favorably, it is preferable that angle (theta) which the groove | channel side surface of the annular groove 6 makes is 40-65 degrees.
Moreover, it is preferable that the curvature radius of the chamfered corner part 42 in a cross section is 15-21 mm, More preferably, it is 17-21 mm. The radius of curvature of the groove bottom of the annular concave groove 6 at the chamfered corner 42 is preferably 21.5 to 25.0 mm, more preferably 21.5 to 23.5 mm. If the above range is not satisfied, there is a risk that the function as the cushion portion may not be sufficiently exhibited when a load is applied to the container 1 from the axial direction. There is a possibility that it becomes difficult to shape the groove 6 into a desired shape.

また、面取り隅部４２の周方向両端縁側（換言すれば、面取り隅部４２と、これと周方向に隣接する側面部４１との境界付近の面取り隅部４２側の部位）には、高さ方向に沿って延在する縦溝状の縦リブ７が形成されている。縦リブ７は、環状凹溝６と交わらずに、その端部が環状凹溝６と離間するように形成される。
さらに、面取り隅部４２の周方向両端縁側に形成された二つの縦リブ７の間には、周方向に沿って延在し、かつ溝深さが一定の横溝状の横リブ８を縦リブ７と離間して形成するが、図示する例では、高さ方向に沿って略等間隔に配置された三つの横リブ８が形成されている。 In addition, the height of the chamfered corner portion 42 at the both ends in the circumferential direction (in other words, the chamfered corner portion 42 near the boundary between the chamfered corner portion 42 and the side surface portion 41 adjacent in the circumferential direction) is high. Vertical groove-shaped vertical ribs 7 extending along the direction are formed. The vertical rib 7 is formed so that the end thereof is separated from the annular groove 6 without intersecting with the annular groove 6.
Further, between the two vertical ribs 7 formed on the circumferential end edges of the chamfered corner portion 42, a horizontal groove-like horizontal rib 8 extending along the circumferential direction and having a constant groove depth is provided as the vertical rib. In the example shown in the figure, three horizontal ribs 8 arranged at substantially equal intervals along the height direction are formed.

容器１に軸方向から加わる荷重を環状凹溝６の弾性変形によって吸収する際に、環状凹部６に隣接する面取り隅４２には、容器外方に膨らむように変形させる応力が作用する。面取り隅部４２に、このような縦リブ７と横リブ８とを形成することにより、環状凹溝６がクッション部として機能して軸方向からの荷重を吸収する際に当該応力に抗して、面取り隅部４２が容器外方に膨らむように変形してしまうのを抑止することができる。
面取り隅部４２に縦リブ７と横リブ８とを形成することによって、面取り部４２の変形を抑止するにあたり、縦リブ７と環状凹溝６の離間距離は、３．０〜６．０ｍｍとするのが好ましい。上記範囲を超えると、面取り隅部４２の変形を十分に抑止できなくなってしまう虞があり、上記範囲に満たないと、縦リブ７と環状凹溝６を所望の形状に賦形しにくくなってしまう虞がある。また、縦リブ７と横リブ８との離間距離は、２．５〜３．５ｍｍとするのが好ましい。上記範囲を超えると、面取り隅部４２の変形を十分に抑止できなくなってしまう虞があり、上記範囲に満たないと、縦リブ７と横リブ８を所望の形状に賦形しにくくなってしまう虞がある。 When the load applied to the container 1 from the axial direction is absorbed by the elastic deformation of the annular groove 6, the chamfered corner 42 adjacent to the annular recess 6 is subjected to a stress that causes the container 1 to bulge outward. By forming such vertical ribs 7 and horizontal ribs 8 in the chamfered corner portion 42, the annular concave groove 6 functions as a cushion portion and resists the stress when absorbing the load from the axial direction. Further, it is possible to prevent the chamfered corner portion 42 from being deformed so as to bulge outward from the container.
In order to suppress the deformation of the chamfered portion 42 by forming the vertical rib 7 and the horizontal rib 8 at the chamfered corner portion 42, the separation distance between the vertical rib 7 and the annular groove 6 is 3.0 to 6.0 mm. It is preferable to do this. If the above range is exceeded, deformation of the chamfered corner 42 may not be sufficiently suppressed, and if it is less than the above range, it becomes difficult to shape the vertical rib 7 and the annular groove 6 into a desired shape. There is a risk of it. Moreover, it is preferable that the separation distance of the vertical rib 7 and the horizontal rib 8 shall be 2.5-3.5 mm. If the range is exceeded, deformation of the chamfered corner 42 may not be sufficiently suppressed. If the range is not exceeded, it becomes difficult to shape the vertical rib 7 and the horizontal rib 8 into a desired shape. There is a fear.

本実施形態において、縦リブ７は、面取り隅部４２の変形をより良好に抑止するには、図示するように、直線状の溝底部で溝側面が交わる断面Ｖ字状の溝形状とするのが好ましいが、所定の幅の溝底部を有し、当該溝底部の幅方向両側縁から溝側面が立ち上がる断面台形状の溝形状としてもよい。このような溝形状の賦形性を損なうことなく、面取り隅部４２の変形を良好に抑止する上で、縦リブ７は、幅ｗ１２．０〜４．０ｍｍ、深さｄ１０．３〜０．６ｍｍとなるように形成するのが好ましい。
一方、横リブ８は、溝深さが一定であれば、縦リブ７と同様に断面Ｖ字状の溝形状としてもよいが、面取り隅部４２の変形をより良好に抑止するには、図示するように、所定の幅の溝底部を有し、当該溝底部の幅方向両側縁から溝側面が立ち上がる断面台形状の溝形状とするのが好ましい。このような溝形状の賦形性を損なうことなく、面取り隅部４２の変形を良好に抑止する上で、横リブ８は、幅ｗ２３．０〜５．０ｍｍ、深さｄ２０．５〜１．５ｍｍとなるように形成するのが好ましく、横リブ８の溝底部の幅ｗ３は０．５〜１．０ｍｍであるのが好ましい。
なお、二つの縦リブ７の間に形成する横リブ８の数は三つに限定されず、要求される軸荷重強度に応じて少なくとも一以上形成すればよい。 In the present embodiment, the vertical rib 7 has a V-shaped groove shape in which the groove side surfaces intersect at the straight groove bottom as shown in the figure in order to better suppress the deformation of the chamfered corner 42. However, it may have a groove shape with a trapezoidal cross section that has a groove bottom portion with a predetermined width and the groove side surface rises from both side edges in the width direction of the groove bottom portion. In order to satisfactorily suppress the deformation of the chamfered corner 42 without impairing the shapeability of the groove shape, the vertical rib 7 has a width w 1 2.0 to 4.0 mm and a depth d 1 . It is preferable to form so that it may become 3-0.6 mm.
On the other hand, as long as the groove depth is constant, the lateral rib 8 may have a groove shape with a V-shaped cross section like the longitudinal rib 7. As described above, it is preferable to have a groove shape with a trapezoidal cross section in which the groove bottom portion has a predetermined width and the groove side surface rises from both side edges in the width direction. In order to satisfactorily suppress the deformation of the chamfered corner 42 without impairing the shapeability of the groove shape, the lateral rib 8 has a width w 2 3.0 to 5.0 mm and a depth d 2 0. is preferably formed to have a 5～1.5Mm, the width w 3 of the groove bottom of the lateral rib 8 is preferably 0.5 to 1.0 mm.
In addition, the number of the horizontal ribs 8 formed between the two vertical ribs 7 is not limited to three, and may be at least one according to the required axial load strength.

このような本実施形態における容器１は、その軸方向から荷重が加わっても、面取り隅部の変形を抑止しつつ、胴部に形成した環状凹溝がクッション部として機能して当該荷重を吸収することにより、高い軸荷重強度を発揮することができる。   In such a container 1 according to this embodiment, even when a load is applied from the axial direction, the annular concave groove formed in the trunk portion functions as a cushion portion and absorbs the load while suppressing the deformation of the chamfered corner portion. By doing so, a high axial load strength can be exhibited.

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、本発明の範囲で種々の変更実施が可能であることはいうまでもない。   Although the present invention has been described with reference to the preferred embodiments, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. Nor.

以上のような本発明は、ボトル状の合成樹脂製容器に適用して、その軸荷重強度を高めることができる。   The present invention as described above can be applied to a bottle-shaped synthetic resin container to increase its axial load strength.

１ 容器
２ 口部
３ 肩部
４ 胴部
４１ 側面部
４２ 面取り隅部
５ 底部
６ 環状凹溝
７ 縦リブ
８ 横リブ DESCRIPTION OF SYMBOLS 1 Container 2 Mouth part 3 Shoulder part 4 Trunk part 41 Side part 42 Chamfering corner part 5 Bottom part 6 Annular groove 7 Vertical rib 8 Horizontal rib

Claims (6)

口部、肩部、胴部、及び底部を備え、前記胴部が、側面部と、横断面が円弧状となるように面取りされた面取り隅部とを有する角筒状に形成されたボトル状の合成樹脂製容器であって、
前記胴部に、前記側面部における溝深さよりも、前記面取り隅部における溝深さが深くなるよう形成された環状凹溝からなるクッション部を設け、
前記面取り隅部の両端縁側に、高さ方向に沿って延在する縦溝状の縦リブを前記環状凹溝と離間させて形成するとともに、
前記面取り隅部における前記縦リブの間に、周方向に沿って延在し、かつ溝深さが一定の横溝状の横リブを前記縦リブと離間させて形成したことを特徴とする合成樹脂製容器。 A bottle having a mouth part, a shoulder part, a body part, and a bottom part, and the body part is formed in a rectangular tube shape having a side surface part and a chamfered corner part chamfered so as to have a circular cross section. A synthetic resin container of
The body portion is provided with a cushion portion formed of an annular concave groove formed so that the groove depth at the chamfered corner portion is deeper than the groove depth at the side surface portion,
While forming the longitudinal groove-shaped longitudinal rib extending along the height direction on the both edge sides of the chamfered corner portion apart from the annular concave groove,
A synthetic resin characterized in that a transverse groove-shaped transverse rib extending in the circumferential direction and having a constant groove depth is formed between the longitudinal ribs at the chamfered corners and spaced apart from the longitudinal rib. Made container. 前記環状凹溝は、溝底から溝側面がＶ字状に立ち上がるように形成された請求項１に記載の合成樹脂製容器。The synthetic resin container according to claim 1, wherein the annular groove is formed such that a groove side surface rises in a V shape from the groove bottom. 前記胴部に、前記クッション部を複数設け、
前記面取り隅部における高さ方向に隣接する前記クッション部の間に、前記縦リブ及び前記横リブを形成した請求項１又は２に記載の合成樹脂製容器。 A plurality of the cushion portions are provided on the trunk portion,
The synthetic resin container according to claim 1 or 2 , wherein the vertical rib and the horizontal rib are formed between the cushion portions adjacent to each other in the height direction at the chamfered corner portion. 前記胴部の上端側と下端側のそれぞれに前記環状凹溝を設けるとともに、当該環状凹溝の間に一又は複数の前記環状凹溝を設け、前記環状凹溝のそれぞれを高さ方向に沿って均等に配置した請求項３に記載の合成樹脂製容器。 While providing the said annular groove on each of the upper end side and lower end side of the said trunk | drum, providing one or some said annular groove between the said annular grooves, Each of the said annular groove is along a height direction. The synthetic resin container according to claim 3 arranged evenly. 前記縦リブは、幅２．０〜４．０ｍｍ、深さ０．３〜０．６ｍｍである請求項１〜４のいずれか一項に記載の合成樹脂製容器。 The synthetic rib container according to any one of claims 1 to 4 , wherein the vertical rib has a width of 2.0 to 4.0 mm and a depth of 0.3 to 0.6 mm. 前記横リブは、幅３．０〜５．０ｍｍ、深さ０．５〜１．５ｍｍである請求項１〜５のいずれか一項に記載の合成樹脂製容器。 The synthetic rib container according to any one of claims 1 to 5 , wherein the lateral rib has a width of 3.0 to 5.0 mm and a depth of 0.5 to 1.5 mm.
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