JP4192303B2

JP4192303B2 - Round plastic bottle

Info

Publication number: JP4192303B2
Application number: JP23796398A
Authority: JP
Inventors: 正樹三浦
Original assignee: Toyo Seikan Kaisha Ltd
Current assignee: Toyo Seikan Group Holdings Ltd
Priority date: 1998-08-11
Filing date: 1998-08-11
Publication date: 2008-12-10
Anticipated expiration: 2018-08-11
Also published as: JP2000062743A

Description

【０００１】
【産業上の利用分野】
本発明は、胴部に複数の傾斜パネルを等間隔に設けた丸型プラスチックボトルに関し、特に上記傾斜パネルの減圧吸収効果を向上させた丸型プラスチックボトルに関する。
【０００２】
【従来技術】
ポリエチレンテレフタレート樹脂等のポリエステルから成るプリフォームを二軸延伸ブロー成形して得たプラスチックボトルは、透明性、耐衝撃性、耐内容物性等に優れ、果汁飲料、ウーロン茶、緑茶、コーヒ、紅茶等の各種飲料等に広く採用されている。
【０００３】
そして、この種のプラスチックボトルとして、胴部に６個あるいは８個の偶数の傾斜パネルを、等間隔にボトルの軸線に対して約２０°傾斜させる共に、傾斜方向の対角線の長さを増長させて、内容物充填後のボトル内の減圧時に、傾斜パネルの内方への変形及び胴部の円周方向に捻れを生じさせることにより、減圧を吸収して胴部の局部的な変形を防止した丸型プラスチックボトルが採用されている。
【０００４】
一方、複数本の傾斜パネルをボトルの軸線に対して約３０°〜４０°程度傾斜させた丸型プラスチックボトルとして、実開昭６１−１０７７１１号、実開平５−４０１１７号、実開平６−５９２０７号等も種々提案されている。
【０００５】
【発明が解決しようとする課題】
しかしながら、従来の胴部に傾斜パネルを設けた丸型プラスチックボトルの成形おいては、減圧吸収性能は有するものの、胴部に設ける複数の傾斜パネルの傾斜角がボトルの軸線に対して約２０°〜４０°で、胴部の円周上に長い距離に亘って上記傾斜パネルが立ち上がって存在することなり、二軸延伸ブロー成形後に金型を開いて上記プラスチックボトルを取り出す際に、上記傾斜パネルが金型と接触して傷が付きやすい。
【０００６】
また、二軸延伸ブロー成形して得られる傾斜パネルを設けたプラスチックボトルの内容量の調整は、金型形状を修正することによって行うが、その形状から煩雑さを伴うものとなるため、上記金型の傾斜パネルに対応する部分を、別部材の入子を用いることが考えられる。
【０００７】
しかし、この場合、効果的に減圧吸収を行うために６個あるいは８個の傾斜パネルを形成すると、金型同士のパーティングライン上を跨いで上記入子が位置し、上記金型の強度が低下して破損を生じ易い。
【０００８】
さらに、これらの問題を解決するために、丸型プラスチックボトルにおいて、胴部に設ける傾斜パネルの傾斜角を、ボトルの軸線に対して単に２０°以下にすると、胴部が円周方向に捻れることによる減圧吸収性能が低下し、一方、上記傾斜パネルの傾斜角を、ボトルの軸線に対して単に４０°以上にすると耐座屈性能が低下するといった問題を生じる。
【０００９】
【課題を解決するための手段】
本発明によれば、胴部にボトルの軸線に対して傾斜角が３°乃至８°の傾斜パネルを等間隔に６個あるいは８個設け、傾斜パネル内に、上記傾斜パネルの傾斜方向の対角線上に第１傾斜線を設け、上記第１傾斜線の中心部近傍から、上記第１傾斜線の下方あるいは上方の対角に向かう第２傾斜線を設けた丸型プラスチック容器が提供される。
【００１０】
また、本発明によれば、第１傾斜線及び第２傾斜線の深さを、上記パネルの対角線の中心部近傍に向かって深くなるように設けた上記丸型プラスチックボトルが提供される。
【００１１】
【発明の実施の形態】
本発明の丸型プラスチックボトルは、胴部にボトルの軸線に対して傾斜角が３°乃至８°の傾斜パネルを等間隔に６個あるいは８個設け、傾斜パネル内に、上記傾斜パネルの傾斜方向の対角線上に第１傾斜線を設け、上記ボトル内に減圧が生じた際に、第１傾斜線を基線として傾斜パネルをボトル内方に突出させる。
【００１２】
そして、上記傾斜パネルの傾斜角が３°未満であると、円周方向の捻れ効果が薄れ、減圧吸収性能が低下する。一方、上記傾斜角が８°を越えると、傾斜パネルを成形するブロー金型の入子がパーティングラインに近づいて、金型の肉厚が薄くなり、金型強度が低下して破損しやすくなる。また、金型のパーティングラインに傾斜パネルを位置させないようにするためには、各々のパネル幅を小さくしなければならず、その場合、減圧吸収効果が低下する。
【００１３】
また、第１傾斜線の中心部近傍から、上記第１傾斜線の下方あるいは上方の対角に向かう第２傾斜線を設け、ボトル内に減圧が生じた際に、第２傾斜線を基線として、上記第１傾斜線で二分され、上記第２傾斜線が設けられた傾斜パネルを、さらにボトル内方に突出させる。
【００１４】
また、傾斜パネルに設けた上記第１傾斜線と第２傾斜線による上記傾斜パネルのボトル内方への突出によって、６個あるいは８個の偶数の傾斜パネルが、円周方向に若干偏った変形を起こすため、胴部は円周方向に大きな捻れを生じ、効率的に減圧を吸収する。
【００１５】
そして、上記傾斜パネルは６個未満の偶数であると、各々のパネル幅が大きくなり、ボトル内方に大きく窪んで内容量が減少する。
【００１６】
また、各々のパネルがボトル内方に大きく窪むと、第１傾斜線乃至第２傾斜線がボトル内方に大きく窪んで、内方への変形が抑えられ、減圧吸収効果が低下する。
【００１７】
一方、８個を越える偶数であると、各々のパネル面積が小さくなり減圧吸収効果が低下する。
【００１８】
さらに、傾斜パネルの中心部近傍において、第１傾斜線と第２傾斜線とが接続させ、ボトル内に減圧が生じた際に、第１傾斜線、第２傾斜線の相互のボトル内方への突出を分断することなく、傾斜パネルの中心部近傍に集中して作用させ、上記中心部近傍を、特に大きく内方へ突出させて、胴部の捻れをより大きくする。
【００１９】
さらに、傾斜パネルと第１傾斜線、第２傾斜線の交線、あるいは、上記第１傾斜線と第２傾斜線の交線は各々なだらかに接続し、上記第１傾斜線及び第２傾斜線の相互のボトル内方への突出を分断させず、効率的に傾斜パネル全体に作用させてなだらかに変形させる。
【００２０】
さらに、第１傾斜線、第２傾斜線の深さは、上記第１傾斜線、第２傾斜線の相互のボトル内方への突出が、パネル中心部近傍に近づくに従って集中して働くので、傾斜パネルの中心部近傍に向かうに従って深くなるように設けて、胴部の捻れをより大きくする。
【００２１】
傾斜パネルの形状は、長方形、平行四辺形、楕円形、トラック形状等の縦長形状が適用可能で、特に制限はない。
【００２２】
【実施例】
次に、図面に基づいて本発明の丸型プラスチックボトルを詳細に説明するが、これらの具体例は本願の内容を限定するものではない。
【００２３】
図１は本願発明の丸型プラスチックボトルの第１実施例を示す参考図、図２は図１の側面図、図３は図１のＡ−Ａ断面図、図４乃至図６は各々、図１のＢ−Ｂ端面図、Ｃ−Ｃ端面図、Ｄ−Ｄ端面図である。
【００２４】
この丸型プラスチックボトル１は、口部２と、胴部３中央付近に設けられたくびれ部４と、くびれ部４を境に胴上部５、胴下部６と、胴下部６と環状リブ７を介して接続する底部８から構成される。
【００２５】
胴下部６周壁には、プラスチックボトル１の軸線に対して、傾斜角が４．５°の縦長形状の傾斜パネル９が６個、円周方向に等間隔に設けられ、傾斜パネル９、９の間には、同様に、傾斜した柱部１０が形成される。
【００２６】
傾斜パネル９内には、その傾斜方向の対角線上に、第１傾斜線１１と、第１傾斜線１１の中心部近傍から、上記第１傾斜線の下方の対角に向かう第２傾斜線１２が設けられ、上記第２傾斜線１２は上記中心部近傍で、図１及び図２に示すように、傾斜パネル９の傾斜方向の上方に向かい、なだらかに湾曲させて上記第１傾斜線１１に接続している。
【００２７】
第１傾斜線１１の上端、下端は各々、傾斜パネルの隅角部の円弧に沿うようになだらかに湾曲して、傾斜パネル９の上辺１３、下辺１４に接続している。
【００２８】
第２傾斜線１２の下端はパネル隅角部の円弧に沿うようになだらかに湾曲して、パネル９の下辺１４に接続している。
【００２９】
図３に示すように、傾斜パネル９は中心部近傍に近づく従い、ボトル内方に深く突出するように設けられ、図４乃至図６に示すように、第１傾斜線１１、第２傾斜線１２の深さは、上記傾斜パネル９の中心部近傍に近づくに従って深く設けており、第１傾斜線１１と第２傾斜線１２は、図５に示すように傾斜パネル９の中心部近傍でなだらかに接続している。
【００３０】
図３乃至図６に示すように、第１傾斜線１１で二分されたパネル１５、１６のうち、特に、第２傾斜線１２が設けられるパネル１６がより深くボトル内方に凸出しており、ボトル内の減圧吸収の際に、パネル１６はより深くボトル内方に変形をして、パネル９は右方に若干偏った変形を示す。その結果、胴部全体は円周方向右方に捻れを起こし、減圧を吸収する。
【００３１】
図７は、本願発明の丸型プラスチックボトルの第２実施例を示す参考図で、この丸型プラスチックボトルの基本的な構成は、上記した第１実施例の丸型プラスチックボトルと同様であり、同一の構成については、同じ符号を付し、説明を省略する。
【００３２】
本実施例の丸型プラスチックボトルにおいては、傾斜パネル９内に設ける第２傾斜線１２を、第１傾斜線１１の上方の対角に向かうように設け、上記第２傾斜線１２を傾斜パネル９のは中心部近傍で、上記傾斜パネル９の傾斜方向の下方に向かい、なだらかに湾曲して上記第１傾斜線１１に接続させている。
【００３３】
また、第２傾斜線１２の上端は、傾斜パネルの隅角部の円弧に沿うようになだらかに湾曲させて、上記傾斜パネル９の上辺１３に接続させている。
【００３４】
第１傾斜線１１で二分されたパネル１５、１６のうち、特に、第２傾斜線１２が設けられるパネル１６がより深くボトル内方に凸出しており、減圧吸収の際、パネル１６はより深くボトル内方に変形をして、傾斜パネル９は右方に若干偏った変形を示す。
【００３５】
【発明の効果】
本発明の丸型プラスチックボトルによれば、効果的に減圧吸収を行うために胴部に傾斜パネルを６個あるいは８個設けた上記プラスチックボトルにおいて、ボトルの軸線に対する傾斜パネルの傾斜角を３°〜８°にすることにより、二軸延伸ブロー成形後に、金型から上記プラスチックボトルを取り出す際に、上記傾斜パネルの傷付きが防止される。
【００３６】
また、上記した金型による傷付きを防止するために、ボトルの軸線に対する傾斜パネルの傾斜角を３°〜８°に設定しても、上記傾斜パネル内に第１傾斜線、第２傾斜線を設けることにより、上記傾斜パネルの減圧吸収及び胴部の円周方向への捻れを容易に生じさせて、充分な減圧吸収を行うことができる。
【００３７】
さらに、減圧吸収性能に優れる傾斜パネルを設けたプラスチックボトルの内容量の調整を行う金型修正においても、上記金型に内容量の調整が容易な別部材の入子を用いても、ボトルの軸線に対する傾斜パネルの傾斜角を３°〜８°にすることにより、上記入子が金型同士のパーティングライン上を跨いで取り付けられることがないため、金型強度の低下が防止される。
【００３８】
この結果、ボトルの内容量の調整が容易な入子方式の金型による二軸延伸ブロー成形が可能となる。
【図面の簡単な説明】
【図１】本発明の丸型プラスチックボトルの第１実施例を示す参考図。
【図２】図１における側面図。
【図３】図１におけるＡ−Ａ断面図。
【図４】図１におけるＢ−Ｂ端面図。
【図５】図１におけるＣ−Ｃ端面図。
【図６】図１におけるＤ−Ｄ端面図。
【図７】本発明の丸型プラスチックボトルの第２実施例を示す参考図
【符号の説明】
１プラスチックボトル
２口部
３胴部
４くびれ部
５胴上部
６胴下部
７環状リブ
８底部
９傾斜パネル
１０柱部
１１第１傾斜線
１２第２傾斜線
１３上辺
１４下辺
１５パネル
１６パネル
- １ -
１[0001]
[Industrial application fields]
The present invention relates to a round plastic bottle in which a plurality of inclined panels are provided at equal intervals on a body portion, and more particularly to a round plastic bottle in which the reduced pressure absorption effect of the inclined panel is improved.
[0002]
[Prior art]
Plastic bottles obtained by biaxial stretch blow molding of preforms made of polyester such as polyethylene terephthalate resin are excellent in transparency, impact resistance, content resistance, etc., such as juice drinks, oolong tea, green tea, coffee, tea, etc. Widely used in various beverages.
[0003]
As this type of plastic bottle, six or eight even-numbered inclined panels are inclined at about 20 ° with respect to the axis of the bottle at equal intervals, and the length of the diagonal line in the inclined direction is increased. When the pressure inside the bottle after filling the contents is reduced, the tilted panel is deformed inward and twisted in the circumferential direction of the barrel, thereby absorbing the reduced pressure and preventing local deformation of the barrel. Round plastic bottles are used.
[0004]
On the other hand, as round plastic bottles in which a plurality of inclined panels are inclined by about 30 ° to 40 ° with respect to the axis of the bottle, Japanese Utility Model Laid-Open Nos. 61-107711, 5-40117, and 6-59207. Various issues have also been proposed.
[0005]
[Problems to be solved by the invention]
However, in the conventional molding of a round plastic bottle provided with an inclined panel on the body part, the inclination angle of a plurality of inclined panels provided on the body part is about 20 ° with respect to the axis of the bottle, although it has a vacuum absorption performance. The inclined panel stands up over a long distance on the circumference of the body at ˜40 °, and when the plastic bottle is taken out by opening the mold after biaxial stretch blow molding, the inclined panel Is easily damaged by contact with the mold.
[0006]
In addition, the adjustment of the inner volume of the plastic bottle provided with the inclined panel obtained by biaxial stretch blow molding is performed by correcting the mold shape. It is conceivable to use a separate insert for the part corresponding to the inclined panel of the mold.
[0007]
However, in this case, if 6 or 8 inclined panels are formed in order to effectively absorb the reduced pressure, the insert is positioned across the parting line between the molds, and the strength of the mold is increased. It tends to drop and break.
[0008]
Furthermore, in order to solve these problems, in the round plastic bottle, when the inclination angle of the inclined panel provided in the body is simply 20 ° or less with respect to the axis of the bottle, the body is twisted in the circumferential direction. However, if the inclination angle of the inclined panel is merely 40 ° or more with respect to the axis of the bottle, there arises a problem that the buckling resistance is reduced.
[0009]
[Means for Solving the Problems]
According to the present invention, six or eight inclined panels having an inclination angle of 3 ° to 8 ° with respect to the axis of the bottle are provided at equal intervals in the body, and the diagonal line of the inclined direction of the inclined panel is provided in the inclined panel. A round plastic container is provided in which a first inclined line is provided on the first inclined line, and a second inclined line is provided from the vicinity of the center of the first inclined line toward a diagonal below or above the first inclined line.
[0010]
Moreover, according to this invention, the said round plastic bottle which provided so that the depth of a 1st inclined line and a 2nd inclined line might become deep toward the center part vicinity of the diagonal of the said panel is provided.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
In the round plastic bottle of the present invention, six or eight inclined panels having an inclination angle of 3 ° to 8 ° with respect to the axis of the bottle are provided in the body at equal intervals, and the inclined panel is inclined in the inclined panel. A first inclined line is provided on the diagonal of the direction, and when the pressure is reduced in the bottle, the inclined panel is projected inward of the bottle with the first inclined line as a base line.
[0012]
If the inclination angle of the inclined panel is less than 3 °, the effect of twisting in the circumferential direction is reduced, and the reduced pressure absorption performance is reduced. On the other hand, if the inclination angle exceeds 8 °, the insert of the blow mold for forming the inclined panel approaches the parting line, the thickness of the mold becomes thin, the mold strength decreases, and it is easy to break. Become. Further, in order to prevent the inclined panel from being positioned on the parting line of the mold, the width of each panel must be reduced, and in that case, the reduced pressure absorption effect is reduced.
[0013]
In addition, a second inclined line is provided from the vicinity of the center of the first inclined line toward the diagonal below or above the first inclined line, and when decompression occurs in the bottle, the second inclined line is used as a base line. The inclined panel that is divided by the first inclined line and provided with the second inclined line is further protruded inward of the bottle.
[0014]
Further, the six or eight even-numbered inclined panels are slightly deformed in the circumferential direction by the protrusion of the inclined panel into the bottle by the first and second inclined lines provided on the inclined panel. Therefore, the torso is greatly twisted in the circumferential direction and efficiently absorbs the reduced pressure.
[0015]
And when the said inclination panel is an even number of less than six, each panel width | variety will become large and it will dent greatly inside a bottle, and internal capacity will reduce.
[0016]
Further, when each panel is greatly recessed inward of the bottle, the first inclined line or the second inclined line is greatly recessed inward of the bottle, the inward deformation is suppressed, and the reduced pressure absorption effect is reduced.
[0017]
On the other hand, if the number is an even number exceeding 8, each panel area is reduced and the reduced pressure absorption effect is reduced.
[0018]
Further, when the first inclined line and the second inclined line are connected in the vicinity of the center portion of the inclined panel, and the pressure is reduced in the bottle, the first inclined line and the second inclined line are inward of each other in the bottle. Without dividing the protrusion, the action is concentrated in the vicinity of the center portion of the inclined panel, and the vicinity of the center portion is protruded particularly inward to further increase the torsion of the trunk portion.
[0019]
Further, the intersecting line of the inclined panel and the first inclined line, the second inclined line, or the intersecting line of the first inclined line and the second inclined line are respectively connected gently, and the first inclined line and the second inclined line are connected. Without causing the mutual inward projections of the bottles to be divided, the slanted panel is efficiently deformed by acting efficiently on the entire inclined panel.
[0020]
Furthermore, the depth of the first inclined line and the second inclined line works as the protrusion of the first inclined line and the second inclined line toward the inside of the bottle concentrates as it approaches the vicinity of the center of the panel. It is provided so as to become deeper toward the vicinity of the center portion of the inclined panel, and the torsion of the trunk portion is further increased.
[0021]
The shape of the inclined panel can be a vertically long shape such as a rectangle, a parallelogram, an ellipse, or a track shape, and is not particularly limited.
[0022]
【Example】
Next, although the round plastic bottle of this invention is demonstrated in detail based on drawing, these specific examples do not limit the content of this application.
[0023]
1 is a reference view showing a first embodiment of the round plastic bottle of the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is a cross-sectional view taken along the line AA of FIG. 1, and FIGS. 1 is a BB end view, a CC end view, and a DD end view of FIG.
[0024]
This round plastic bottle 1 has a mouth portion 2, a constricted portion 4 provided near the center of the trunk portion 3, a trunk upper portion 5, a trunk lower portion 6, a trunk lower portion 6 and an annular rib 7. It is comprised from the bottom part 8 connected via.
[0025]
Six longitudinally inclined panels 9 having an inclination angle of 4.5 ° with respect to the axis of the plastic bottle 1 are provided on the circumferential wall of the lower body 6 at equal intervals in the circumferential direction. In the meantime, an inclined column portion 10 is similarly formed.
[0026]
In the inclined panel 9, on the diagonal line of the inclination direction, the first inclined line 11 and the second inclined line 12 from the vicinity of the center of the first inclined line 11 to the diagonal line below the first inclined line. As shown in FIGS. 1 and 2, the second inclined line 12 is gradually curved upward toward the inclined direction of the inclined panel 9 and gently curved to the first inclined line 11 in the vicinity of the central portion. Connected.
[0027]
The upper end and the lower end of the first inclined line 11 are each gently curved so as to follow the arc of the corner portion of the inclined panel, and are connected to the upper side 13 and the lower side 14 of the inclined panel 9.
[0028]
The lower end of the second inclined line 12 is gently curved so as to follow the arc at the corner of the panel, and is connected to the lower side 14 of the panel 9.
[0029]
As shown in FIG. 3, the inclined panel 9 is provided so as to protrude deeply inward of the bottle as it approaches the vicinity of the center, and as shown in FIGS. 4 to 6, the first inclined line 11 and the second inclined line are provided. The depth of 12 is provided deeper toward the vicinity of the central portion of the inclined panel 9, and the first inclined line 11 and the second inclined line 12 are gently in the vicinity of the central portion of the inclined panel 9 as shown in FIG. 5. Connected to.
[0030]
As shown in FIGS. 3 to 6, among the panels 15 and 16 divided by the first inclined line 11, in particular, the panel 16 provided with the second inclined line 12 protrudes deeper into the bottle, During vacuum absorption in the bottle, the panel 16 is deformed deeper into the bottle and the panel 9 is deformed slightly to the right. As a result, the entire body is twisted to the right in the circumferential direction and absorbs the reduced pressure.
[0031]
FIG. 7 is a reference diagram showing a second embodiment of the round plastic bottle of the present invention. The basic configuration of this round plastic bottle is the same as the round plastic bottle of the first embodiment described above. About the same structure, the same code | symbol is attached | subjected and description is abbreviate | omitted.
[0032]
In the round plastic bottle of the present embodiment, the second inclined line 12 provided in the inclined panel 9 is provided so as to go diagonally above the first inclined line 11, and the second inclined line 12 is provided on the inclined panel 9. In the vicinity of the center portion, the inclined panel 9 is directed downward in the inclination direction, and is gently curved and connected to the first inclined line 11.
[0033]
Further, the upper end of the second inclined line 12 is gently curved along the arc of the corner portion of the inclined panel and connected to the upper side 13 of the inclined panel 9.
[0034]
Among the panels 15 and 16 divided into two by the first inclined line 11, in particular, the panel 16 provided with the second inclined line 12 protrudes deeper inward of the bottle, and the panel 16 becomes deeper during the vacuum absorption. When the bottle is deformed inward, the inclined panel 9 is slightly deformed to the right.
[0035]
【The invention's effect】
According to the round plastic bottle of the present invention, the tilt angle of the tilt panel with respect to the axis of the bottle is 3 ° in the above-mentioned plastic bottle in which six or eight tilt panels are provided in the body portion for effective vacuum absorption. By making it ˜8 °, the inclined panel is prevented from being damaged when the plastic bottle is taken out from the mold after biaxial stretch blow molding.
[0036]
Further, in order to prevent the above-mentioned mold from being damaged, even if the inclination angle of the inclined panel with respect to the axis of the bottle is set to 3 ° to 8 °, the first inclined line and the second inclined line are formed in the inclined panel. By providing the above, it is possible to easily generate the reduced pressure absorption of the inclined panel and torsion in the circumferential direction of the body portion, and to perform sufficient reduced pressure absorption.
[0037]
Furthermore, even in the mold correction for adjusting the inner volume of the plastic bottle provided with the inclined panel having excellent decompression absorption performance, even if a separate member nesting that allows easy adjustment of the inner volume is used for the mold, By setting the inclination angle of the inclined panel with respect to the axis to 3 ° to 8 °, the insert is not attached across the parting line between the molds, so that the mold strength is prevented from being lowered.
[0038]
As a result, it is possible to perform biaxial stretch blow molding with a nested mold that allows easy adjustment of the inner volume of the bottle.
[Brief description of the drawings]
FIG. 1 is a reference diagram showing a first embodiment of a round plastic bottle of the present invention.
FIG. 2 is a side view of FIG.
3 is a cross-sectional view taken along line AA in FIG.
4 is an end view taken along line BB in FIG. 1. FIG.
FIG. 5 is a cross-sectional view taken along the line CC in FIG.
6 is a DD end view in FIG. 1. FIG.
FIG. 7 is a reference diagram showing a second embodiment of the round plastic bottle of the present invention.
DESCRIPTION OF SYMBOLS 1 Plastic bottle 2 Mouth part 3 Body part 4 Constriction part 5 Body upper part 6 Body lower part 7 Annular rib 8 Bottom part 9 Inclined panel 10 Column 11 First inclined line 12 Second inclined line 13 Upper side 14 Lower side 15 Panel 16 Panel
-1-
1

Claims

Six or eight inclined panels with an inclination angle of 3 ° to 8 ° with respect to the axis of the bottle are provided at equal intervals on the body, and the first inclined line is on the diagonal of the inclined direction of the inclined panel in the inclined panel. A round plastic bottle characterized in that a second inclined line is provided from the vicinity of the center of the first inclined line toward the diagonal below or above the first inclined line.

2. The round plastic bottle according to claim 1, wherein the first inclined line and the second inclined line are provided so that the depths thereof become deeper toward the vicinity of the central part of the diagonal line of the panel.