JP6438834B2

JP6438834B2 - Square bottle

Info

Publication number: JP6438834B2
Application number: JP2015092933A
Authority: JP
Inventors: 鈴木　孝典; 孝典鈴木; 憲雄横田; 峻原田
Original assignee: Yoshino Kogyosho Co Ltd
Current assignee: Yoshino Kogyosho Co Ltd
Priority date: 2015-04-30
Filing date: 2015-04-30
Publication date: 2018-12-19
Anticipated expiration: 2035-04-30
Also published as: JP2016210424A

Description

本発明は、角形ボトルに関する。 The present invention relates to a square bottle.

従来から、口部、肩部、胴部及び底部が合成樹脂材料で一体に形成されたボトルとして、ボトル軸方向に直交する横断面視で胴部が多角形状に形成された、いわゆる角形ボトルが知られている。例えば特許文献１に示される角形ボトルの胴部は、主壁部と隅角壁部とがボトル軸周りの周方向に交互に連設されて構成されるとともに、主壁部に径方向の内側に向けて窪むパネル部が形成されている。パネル部は、径方向の内側に位置するパネル底壁部と、パネル底壁部の外周縁から径方向の外側に向けて延びる側壁部と、により画成されている。 Conventionally, as a bottle in which a mouth part, a shoulder part, a body part, and a bottom part are integrally formed of a synthetic resin material, a so-called square bottle in which a body part is formed in a polygonal shape in a cross-sectional view orthogonal to the bottle axial direction is provided. Are known. For example, the body portion of the square bottle shown in Patent Document 1 is configured such that the main wall portion and the corner wall portion are alternately arranged in the circumferential direction around the bottle axis, and the main wall portion is radially inward. A panel portion that is recessed toward is formed. The panel part is defined by a panel bottom wall part located on the inner side in the radial direction and a side wall part extending from the outer peripheral edge of the panel bottom wall part toward the outer side in the radial direction.

特開平１０−７１２３号公報Japanese Patent Laid-Open No. 10-7123

ところで、上述した従来の角形ボトルでは、例えば内容物の充填時等において、角形ボトルが充填装置にセットされた状態で、角形ボトルにボトル軸方向の圧縮力が作用する場合がある。
このとき、パネル底壁部と、側壁部のうち周方向を向く縦側壁部と、の接続部分に作用するボトル軸方向の圧縮力により胴部が径方向の外側に向けて膨出変形（座屈）するおそれがある。 By the way, in the conventional square bottle mentioned above, the compression force of a bottle axial direction may act on a square bottle in the state which set the square bottle in the filling apparatus, for example at the time of filling of the contents.
At this time, the barrel portion bulges outwardly in the radial direction due to the compressive force in the bottle axial direction acting on the connection portion between the panel bottom wall portion and the longitudinal side wall portion facing the circumferential direction of the side wall portions (seat There is a risk of bending.

そこで、本発明は、上述した事情に鑑みてなされたものであって、胴部が座屈するのを抑制できる角形ボトルを提供することを目的とする。 Then, this invention is made | formed in view of the situation mentioned above, Comprising: It aims at providing the square bottle which can suppress that a trunk | drum buckles.

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。
本発明に係る角形ボトルは、口部、肩部、胴部及び底部が合成樹脂材料で一体に形成されてなり、前記胴部は、主壁部と隅角壁部とがボトル軸周りの周方向に交互に連設されて構成され、前記主壁部には、ボトル軸方向から見た平面視においてボトル軸に直交する径方向の内側に向けて窪むパネル部が形成され、前記パネル部は、径方向の内側に位置するパネル底壁部と、前記パネル底壁部の外周縁から径方向の外側に向けて延びる側壁部と、により画成され、前記側壁部のうち周方向を向く縦側壁部と、前記パネル底壁部と、の接続部分には、径方向の外側に向けて突出する突部が形成され、前記突部は、上突部と、下突部と、前記上突部及び前記下突部間を接続する連結突部と、を有し、前記連結突部は、周方向の長さが前記上突部及び前記下突部よりも短く、かつ前記上突部及び前記下突部よりも径方向の内側に位置し、前記パネル底壁部のうち、ボトル軸方向における前記上突部及び前記下突部間であって、前記連結突部に対して周方向の内側に連なる部分には、前記パネル底壁部に対して径方向の内側に窪む凹部が形成されていることを特徴とする。
In order to solve the above problems, the present invention proposes the following means.
The square bottle according to the present invention has a mouth portion, a shoulder portion, a body portion, and a bottom portion that are integrally formed of a synthetic resin material, and the body portion includes a main wall portion and a corner wall portion around the bottle axis. The main wall portion is formed with a panel portion that is recessed toward the inside in the radial direction perpendicular to the bottle axis in a plan view as viewed from the bottle axis direction. Is defined by a panel bottom wall portion located inside in the radial direction, and a side wall portion extending from the outer peripheral edge of the panel bottom wall portion toward the outside in the radial direction, and faces the circumferential direction of the side wall portions. A protruding portion that protrudes outward in the radial direction is formed at a connection portion between the vertical side wall portion and the panel bottom wall portion, and the protruding portion includes an upper protruding portion, a lower protruding portion, and the upper protruding portion. A connecting protrusion that connects between the protrusion and the lower protrusion, and the connecting protrusion has a circumferential length that is the upper protrusion and It is shorter than the lower protrusion and is located radially inside of the upper protrusion and the lower protrusion, and of the panel bottom wall portion, between the upper protrusion and the lower protrusion in the bottle axial direction. And the recessed part dented in the radial inside with respect to the said panel bottom wall part is formed in the part connected to the inner side of the circumferential direction with respect to the said connection protrusion .

この構成によれば、例えば内容物の充填時において、ボトルに対してボトル軸方向の圧縮力（ボトル軸方向への荷重）が加えられた際、縦側壁部とパネル底壁部との接続部分に作用するボトル軸方向の圧縮力が、突部と、縦側壁部及びパネル底壁部と、の境界部分に沿って及ぼされることになる。これにより、上述した接続部分に作用するボトル軸方向の圧縮力を径方向や周方向に分散させることが可能になり、接続部分が径方向の外側に向けて膨出して、胴部の座屈の起点になるのを抑制できる。 According to this configuration, for example, when a compressive force in the bottle axial direction (load in the bottle axial direction) is applied to the bottle when filling the contents, the connecting portion between the vertical side wall and the panel bottom wall The compressive force in the bottle axial direction acting on the pressure is exerted along the boundary portion between the protrusion, the vertical side wall portion, and the panel bottom wall portion. Thereby, it becomes possible to disperse the compressive force in the bottle axial direction acting on the connecting portion described above in the radial direction and the circumferential direction, and the connecting portion bulges outward in the radial direction to buckle the trunk portion. Can be suppressed from starting.

本発明に係る角形ボトルにおいて、前記突部の表面のうち径方向の外側を向く外面と、前記胴部のうち周方向で隣り合うパネル部同士の間に位置する部分の外面と、は段差なく連なっていてもよい。
この場合には、接続部分に作用するボトル軸方向の圧縮力が、径方向に分散された後、胴部の外面に及ぼされることになる。これにより、接続部分に作用するボトル軸方向の圧縮力を突部で分断することが可能になり、胴部の変形を確実に抑制できる。 In the square bottle according to the present invention, there is no step between the outer surface facing the radially outer side of the surface of the protrusion and the outer surface of the portion located between the panel portions adjacent in the circumferential direction of the body portion. You may be connected.
In this case, the compressive force in the bottle axial direction that acts on the connecting portion is distributed in the radial direction and then exerted on the outer surface of the body portion. Thereby, it becomes possible to divide the compressive force of the bottle axial direction which acts on a connection part by a protrusion, and can suppress a deformation | transformation of a trunk | drum reliably.

本発明に係る角形ボトルにおいて、前記胴部には、径方向の内側に向けて窪むとともに、周方向に延びる周溝が形成され、前記突部は、前記縦側壁部における前記周溝の開口周縁部に連なって形成されていてもよい。
この場合には、胴部に周溝が形成されているため、胴部の剛性を確保し、流通時やラインプレッシャ―等、胴部に径方向の内側に向けて応力が作用した場合の胴部の径方向の内側に向けた過大な変形を抑制できる。そして、縦側壁部のうちボトル軸方向の圧縮力が加えられたときに応力が集中し易い周溝の開口周縁部に突部が連なって形成されているため、上述した応力を、突部と、縦側壁部及びパネル底壁部と、の境界部分に沿って分散させることができる。これにより、胴部の変形を確実に抑制できる。 In the square bottle according to the present invention, the body portion is formed with a circumferential groove that is recessed inward in the radial direction and extends in the circumferential direction, and the projecting portion is an opening peripheral edge of the circumferential groove in the vertical side wall portion. It may be formed continuously with the part.
In this case, since the circumferential groove is formed in the body portion, the rigidity of the body portion is ensured, and when the stress is applied to the body portion toward the inside in the radial direction during distribution, line pressure, etc. Excessive deformation toward the inside in the radial direction of the portion can be suppressed. And since the protrusions are formed continuously with the peripheral edge of the opening of the circumferential groove where stress tends to concentrate when the compressive force in the bottle axial direction is applied in the vertical side wall, the stress described above is , And can be distributed along the boundary between the vertical side wall and the panel bottom wall. Thereby, a deformation | transformation of a trunk | drum can be suppressed reliably.

本発明に係る角形ボトルによれば、胴部が座屈するのを抑制できる。 According to the square bottle according to the present invention, it is possible to suppress the body portion from buckling.

本発明の実施形態に係るボトルの側面図である。It is a side view of the bottle which concerns on embodiment of this invention. 図１におけるＡ部の拡大側面図である。It is an enlarged side view of the A section in FIG. 図２のＢ−Ｂ線に沿う断面図である。It is sectional drawing which follows the BB line of FIG. 図２のＣ−Ｃ線に沿う断面図である。It is sectional drawing which follows the CC line of FIG. 実施形態の他の構成に係る図２に相当する拡大側面図である。FIG. 4 is an enlarged side view corresponding to FIG. 2 according to another configuration of the embodiment. 図５のＤ−Ｄ線に沿う断面図である。It is sectional drawing which follows the DD line | wire of FIG.

以下、図面を参照し、本発明の実施形態を説明する。
図１に示すように、本実施形態の角形ボトル１（以下、単にボトル１という）は、口部１１、肩部１２、胴部１３及び底部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、この順に連設されて概略構成されている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the square bottle 1 of the present embodiment (hereinafter simply referred to as “bottle 1”) has a mouth portion 11, a shoulder portion 12, a body portion 13, and a bottom portion 14 with their central axes positioned on a common axis. In this state, they are generally arranged in this order.

以下、上述した共通軸をボトル軸Ｏといい、ボトル軸Ｏ方向に沿って口部１１側を上側、底部１４側を下側といい、また、ボトル軸Ｏ方向から見た平面視においてボトル軸Ｏに直交する方向を径方向といい、ボトル軸Ｏ回りに周回する方向を周方向という。なお、このボトル１は、合成樹脂材料で一体に形成され、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る。また、口部１１には、図示しないキャップが装着される。 Hereinafter, the above-described common axis is referred to as a bottle axis O, the mouth part 11 side is referred to as the upper side and the bottom part 14 side is referred to as the lower side along the bottle axis O direction, and the bottle axis in a plan view viewed from the bottle axis O direction. A direction orthogonal to O is referred to as a radial direction, and a direction around the bottle axis O is referred to as a circumferential direction. The bottle 1 is integrally formed of a synthetic resin material, and is formed by blow molding a preform formed into a bottomed cylinder by injection molding. Further, a cap (not shown) is attached to the mouth portion 11.

ボトル１において、少なくとも胴部１３は、ボトル軸Ｏに直交する横断面視が角形状（正方形状）を呈し、その中心に上述したボトル軸Ｏが位置している。具体的に、胴部１３は、ボトル軸Ｏに直交する横断面視において、胴部１３の辺部分を構成する複数の主壁部２１と、周方向で隣り合う主壁部２１間を接続するとともに、胴部１３の角部分を構成する隅角壁部２２と、を備えている。すなわち、本実施形態の胴部１３は、４つの主壁部２１及び隅角壁部２２が周方向に交互に連設されて構成されている。 In the bottle 1, at least the body portion 13 has a square shape (square shape) in a cross-sectional view orthogonal to the bottle axis O, and the bottle axis O described above is located at the center thereof. Specifically, the trunk portion 13 connects a plurality of main wall portions 21 constituting the side portion of the trunk portion 13 and the main wall portions 21 adjacent in the circumferential direction in a cross-sectional view orthogonal to the bottle axis O. In addition, a corner wall portion 22 constituting a corner portion of the body portion 13 is provided. That is, the trunk portion 13 of the present embodiment is configured by four main wall portions 21 and corner wall portions 22 being alternately arranged in the circumferential direction.

主壁部２１は、ボトル軸Ｏ方向に沿う縦断面視及びボトル軸Ｏに直交する横断面視で直線状を呈している。
隅角壁部２２は、ボトル軸Ｏ方向に沿う縦断面視で直線状を呈するとともに、ボトル軸Ｏに直交する横断面視で径方向の外側に向けて突の曲線状を呈している。なお、隅角壁部２２は、ボトル軸Ｏに直交する横断面視で直線状を呈していても構わない。 The main wall portion 21 has a linear shape in a longitudinal sectional view along the bottle axis O direction and in a transverse sectional view orthogonal to the bottle axis O.
The corner wall portion 22 has a straight line shape in a longitudinal sectional view along the bottle axis O direction, and has a curved shape protruding outward in the radial direction in a transverse sectional view orthogonal to the bottle axis O. Note that the corner wall portion 22 may have a linear shape in a cross-sectional view orthogonal to the bottle axis O.

各主壁部２１には、径方向の内側に向けて窪む減圧吸収用のパネル部２３が各別に形成されている。各パネル部２３は、径方向から見た側面視において、ボトル軸Ｏ方向を長手方向とする長方形状を呈し、主壁部２１の外周部分を除く全域に亘って形成されている。図示の例において、各パネル部２３は、それぞれ同形同大とされ、各主壁部２１に対してそれぞれ１つずつ形成されている。 Each main wall portion 21 is formed with a decompression absorbing panel portion 23 that is recessed inward in the radial direction. Each panel portion 23 has a rectangular shape with the bottle axis O direction as the longitudinal direction in a side view as viewed from the radial direction, and is formed over the entire area excluding the outer peripheral portion of the main wall portion 21. In the illustrated example, each panel portion 23 has the same shape and the same size, and one panel portion 23 is formed for each main wall portion 21.

パネル部２３は、主壁部２１の外面に対して径方向の内側に位置するパネル底壁部３１と、パネル底壁部３１の外周縁から径方向の外側に向けて延びる側壁部３２と、により画成されている。
パネル底壁部３１は、ボトル軸Ｏ方向に沿う縦断面視及びボトル軸Ｏに直交する横断面視で直線状を呈し、主壁部２１と平行に延在している。パネル底壁部３１には、径方向の内側に向けて窪むとともに、周方向に沿って延びる凹リブ３３がボトル軸Ｏ方向に間隔をあけて複数形成されている。これら凹リブ３３は、パネル部２３の受圧面積を増加させるものであって、径方向から見た側面視で長方形状を呈している。なお、図示の例において、凹リブ３３は、パネル底壁部３１の上部及び下部にそれぞれ３つずつ形成されている。 The panel part 23 includes a panel bottom wall part 31 positioned radially inward with respect to the outer surface of the main wall part 21, a side wall part 32 extending from the outer peripheral edge of the panel bottom wall part 31 toward the radially outer side, It is defined by.
The panel bottom wall portion 31 has a straight shape in a longitudinal sectional view along the bottle axis O direction and a transverse sectional view orthogonal to the bottle axis O, and extends in parallel with the main wall portion 21. The panel bottom wall portion 31 is formed with a plurality of concave ribs 33 that are recessed toward the inside in the radial direction and that extend along the circumferential direction at intervals in the bottle axis O direction. These concave ribs 33 increase the pressure receiving area of the panel portion 23 and have a rectangular shape in a side view as viewed from the radial direction. In the illustrated example, three concave ribs 33 are formed on each of the upper and lower portions of the panel bottom wall portion 31.

側壁部３２は、周方向の内側（パネル部２３の内側）を向く一対の縦側壁部３２ａと、ボトル軸Ｏ方向の内側（パネル部２３の内側）を向く横側壁部３２ｂと、を有している。
各縦側壁部３２ａは、パネル底壁部３１における周方向の両端に各別に連なりボトル軸Ｏ方向に延設されている。縦側壁部３２ａは、径方向の内側から外側に向かうに従い周方向の外側に向けて傾斜している。縦側壁部３２ａにおける径方向の外側端縁は、主壁部２１の外面に周方向の内側から連なっている。
各横側壁部３２ｂは、パネル底壁部３１におけるボトル軸Ｏ方向の両端に各別に連なり周方向に沿って延設されている。横側壁部３２ｂは、径方向の内側から外側に向かうに従いボトル軸Ｏ方向の外側に向けて傾斜している。横側壁部３２ｂにおける径方向の外側端縁は、主壁部２１の外面にボトル軸Ｏ方向の内側から連なっている。 The side wall part 32 has a pair of vertical side wall parts 32a facing the inner side in the circumferential direction (the inner side of the panel part 23), and a horizontal side wall part 32b facing the inner side in the bottle axis O direction (the inner side of the panel part 23). ing.
Each of the vertical side wall portions 32a is connected to both ends in the circumferential direction of the panel bottom wall portion 31 and extends in the bottle axis O direction. The vertical side wall portion 32a is inclined toward the outer side in the circumferential direction from the inner side in the radial direction toward the outer side. The outer edge in the radial direction of the vertical side wall portion 32a is connected to the outer surface of the main wall portion 21 from the inner side in the circumferential direction.
Each lateral wall portion 32b is connected to both ends of the panel bottom wall portion 31 in the bottle axis O direction and extends along the circumferential direction. The lateral wall portion 32b is inclined toward the outer side in the bottle axis O direction from the inner side in the radial direction toward the outer side. The outer edge in the radial direction of the side wall portion 32 b is continuous with the outer surface of the main wall portion 21 from the inner side in the bottle axis O direction.

主壁部２１において、パネル部２３よりも外側に位置する外周部分には、径方向の内側に向けて窪む上溝３５及び下溝３６が形成されている。
上溝３５は、径方向から見た側面視で逆Ｕ字状を呈し、主壁部２１の上部（後述する周溝４０に対して上方に位置する部分）において、上述したパネル部２３を上方及び周方向の両側から取り囲んでいる。図示の例において、上溝３５のうち、ボトル軸Ｏ方向に沿って延びる部分は、主壁部２１と隅角壁部２２との境界部分に沿って延在している。
下溝３６は、径方向から見た側面視でボトル軸Ｏ方向に沿って延びる直線状を呈し、主壁部２１の下部（周溝４０に対して下方に位置する部分）において、パネル部２３に対して周方向の両側に位置する部分に一対形成されている。図示の例において、各下溝３６は、主壁部２１と隅角壁部２２との境界部分に沿って延在している。 In the main wall portion 21, an upper groove 35 and a lower groove 36 that are recessed toward the inner side in the radial direction are formed on the outer peripheral portion located outside the panel portion 23.
The upper groove 35 has an inverted U shape in a side view as viewed from the radial direction, and the upper portion of the main wall portion 21 (a portion positioned above the circumferential groove 40 described later) Surrounding from both sides in the circumferential direction. In the illustrated example, a portion of the upper groove 35 extending along the bottle axis O direction extends along a boundary portion between the main wall portion 21 and the corner wall portion 22.
The lower groove 36 has a linear shape extending along the bottle axis O direction in a side view as viewed from the radial direction, and is formed in the panel portion 23 at a lower portion of the main wall portion 21 (portion positioned below the circumferential groove 40). On the other hand, a pair is formed at portions located on both sides in the circumferential direction. In the illustrated example, each lower groove 36 extends along a boundary portion between the main wall portion 21 and the corner wall portion 22.

各隅角壁部２２におけるボトル軸Ｏ方向の中央部には、径方向の内側に向けて窪むとともに、周方向に沿って延びる周溝４０が形成されている。周溝４０は、隅角壁部２２及び隅角壁部２２に対して周方向の両側に位置する両主壁部２１に跨って形成されている。周溝４０における周方向の両側端部は、上述した縦側壁部３２ａを通してパネル部２３内に開口している。したがって、周方向で隣り合う周溝４０同士は、パネル部２３によって分断されている。なお、周溝４０の径方向の深さは、パネル部２３の径方向の深さよりも浅くなっている。 A circumferential groove 40 that is recessed toward the inside in the radial direction and that extends along the circumferential direction is formed in the central portion of each corner wall portion 22 in the bottle axis O direction. The circumferential groove 40 is formed so as to straddle the corner wall portion 22 and both the main wall portions 21 located on both sides in the circumferential direction with respect to the corner wall portion 22. Both end portions in the circumferential direction of the circumferential groove 40 are opened in the panel portion 23 through the vertical side wall portion 32a described above. Therefore, the circumferential grooves 40 adjacent in the circumferential direction are separated by the panel portion 23. Note that the radial depth of the circumferential groove 40 is shallower than the radial depth of the panel portion 23.

ここで、図２、図３に示すように、縦側壁部３２ａとパネル底壁部３１との接続部分Ｒには、接続部分Ｒをボトル軸Ｏ方向に分断する突部４２が径方向の外側に向けて突出している。突部４２は、周溝４０に対して上方に位置する上突部４３と、周溝４０に対して下方に位置する下突部４４と、これら上突部４３及び下突部４４間を接続する連結突部４５と、を有している。本実施形態の突部４２は、同一のパネル部２３における各接続部分Ｒにそれぞれ周方向に離間した状態で配置されている。なお、各突部４２は、互いに同様の構成とされているため、以下の説明では一の突部４２について説明する。 Here, as shown in FIGS. 2 and 3, the connecting portion R between the vertical side wall portion 32 a and the panel bottom wall portion 31 has a protruding portion 42 that divides the connecting portion R in the bottle axis O direction. Protrusively toward. The protrusion 42 connects the upper protrusion 43 positioned above the circumferential groove 40, the lower protrusion 44 positioned below the circumferential groove 40, and the upper protrusion 43 and the lower protrusion 44. Connecting projections 45 to be connected. The protrusions 42 of the present embodiment are arranged in a state of being spaced apart in the circumferential direction at each connection portion R in the same panel portion 23. In addition, since each protrusion 42 is set as the mutually same structure, the one protrusion 42 is demonstrated in the following description.

上突部４３は、角錐台形状を呈し、パネル底壁部３１から径方向の外側に向けて膨出するとともに、縦側壁部３２ａに接続されている。具体的に、上突部４３は、パネル底壁部３１に対して径方向の外側に位置する頂部５１と、頂部５１の外周縁から径方向の内側に向けて延びる周壁部５２と、を有している。
頂部５１は、径方向から見た側面視で矩形状を呈し、主壁部２１と平行に延在している。また、頂部５１は、径方向において上述した主壁部２１よりも内側であって、周溝４０の底部よりも外側に位置している。頂部５１の外周縁のうち、周方向の外側に位置する外側周端縁は、接続部分Ｒよりも周方向の外側に位置し、縦側壁部３２ａに周方向の内側から連なっている。 The upper protrusion 43 has a truncated pyramid shape, bulges outward from the panel bottom wall portion 31 in the radial direction, and is connected to the vertical side wall portion 32a. Specifically, the upper protrusion 43 has a top 51 located radially outside the panel bottom wall 31 and a peripheral wall 52 extending from the outer periphery of the top 51 toward the inside in the radial direction. doing.
The top 51 has a rectangular shape in a side view as viewed from the radial direction, and extends in parallel with the main wall 21. Further, the top portion 51 is located inside the main wall portion 21 described above in the radial direction and outside the bottom portion of the circumferential groove 40. Outer peripheral edges of the outer periphery of the top part 51 are located on the outer side in the circumferential direction with respect to the connection part R, and are connected to the vertical side wall part 32a from the inner side in the circumferential direction.

周壁部５２は、頂部５１の外周縁のうちボトル軸Ｏ方向の両側及び周方向の内側に連なっている。周壁部５２のうち、頂部５１における周方向の内側に連なりボトル軸Ｏ方向に沿って延びる縦周壁部５２ａは、径方向の外側から内側に向かうに従い周方向の内側に向けて傾斜している。
周壁部５２のうち、頂部５１におけるボトル軸Ｏ方向の両端に連なり周方向に沿って延びる横周壁部５２ｂは、径方向の外側から内側に向かうに従いボトル軸Ｏ方向の外側に向けて傾斜している。なお、各横周壁部５２ｂのうち下方を向く横周壁部５２ｂは、周溝４０の内側面のうち下方を向く内側面よりも上方に位置している。 The peripheral wall portion 52 is connected to both sides in the bottle axis O direction and the inner side in the circumferential direction of the outer peripheral edge of the top portion 51. Of the peripheral wall portion 52, the vertical peripheral wall portion 52 a that is continuous with the inner side in the circumferential direction at the top portion 51 and extends along the bottle axis O direction is inclined toward the inner side in the circumferential direction from the outer side in the radial direction toward the inner side.
Of the peripheral wall portion 52, the lateral peripheral wall portion 52 b that is connected to both ends of the top portion 51 in the bottle axis O direction and extends along the circumferential direction is inclined toward the outer side in the bottle axis O direction from the outer side in the radial direction toward the inner side. Yes. In addition, the horizontal peripheral wall part 52b which faces downward among each horizontal peripheral wall part 52b is located above the inner side face which faces downward among the inner side surfaces of the circumferential groove 40.

下突部４４は、周溝４０におけるボトル軸Ｏ方向の中央部を通り周方向に延びる対称線に対してボトル軸Ｏ方向で上突部４３と線対称に構成されている。すなわち、下突部４４は、パネル底壁部３１に対して径方向の外側に位置する頂部６１と、頂部６１の外周縁から径方向の内側に向けて延びる周壁部６２（縦周壁部６２ａ及び横周壁部６２ｂ）と、を有している。 The lower protrusion 44 is configured to be symmetrical with the upper protrusion 43 in the bottle axis O direction with respect to a symmetrical line extending in the circumferential direction through the central portion of the circumferential groove 40 in the bottle axis O direction. That is, the lower protrusion 44 includes a top portion 61 positioned on the radially outer side with respect to the panel bottom wall portion 31, and a peripheral wall portion 62 (vertical peripheral wall portion 62a and the peripheral wall portion 62a extending from the outer peripheral edge of the top portion 61 toward the radial inner side. Horizontal peripheral wall 62b).

図２、図４に示すように、連結突部４５は、上述した周溝４０の底部とボトル軸Ｏ方向で同等の位置に配置され、上突部４３及び下突部４４のうちボトル軸Ｏ方向で対向する横周壁部５２ｂ，６２ｂ同士をボトル軸Ｏ方向で連結している。連結突部４５は、パネル底壁部３１に対して径方向の外側に位置する頂部６５と、頂部６５における周方向の内側端縁から径方向の内側に向けて延びる内側周壁部６６と、を有している。 As shown in FIGS. 2 and 4, the connecting protrusion 45 is disposed at the same position as the bottom of the circumferential groove 40 described above in the bottle axis O direction, and the bottle axis O of the upper protrusion 43 and the lower protrusion 44. The circumferential wall portions 52b and 62b facing each other in the direction are connected in the bottle axis O direction. The connection protrusion 45 includes a top portion 65 located on the outer side in the radial direction with respect to the panel bottom wall portion 31, and an inner peripheral wall portion 66 extending inward in the radial direction from the inner edge in the circumferential direction at the top portion 65. Have.

頂部６５は、径方向から見た側面視で矩形状を呈し、主壁部２１と平行に延在している。頂部６５は、径方向において上突部４３及び下突部４４の頂部５１，６１よりも内側に位置するとともに、周溝４０の底部よりも内側に位置している。頂部６５は、ボトル軸Ｏ方向の幅が上突部４３及び下突部４４の頂部５１，６１よりも狭くなっている。また、頂部６５は、周方向の長さが上突部４３及び下突部４４の頂部５１，６１よりも短くなっている。この場合、頂部６５のうち、周方向の外側に位置する外側周端縁は縦側壁部３２ａに周方向の内側から連なり、周方向の内側に位置する内側周端縁は頂部５１，６１における周方向の内側に位置する内側周端縁よりも周方向の外側に位置している。
内側周壁部６６は、径方向の外側から内側に向かうに従い周方向の内側に向けて傾斜している。 The top portion 65 has a rectangular shape when viewed from the radial direction, and extends in parallel with the main wall portion 21. The top portion 65 is located inside the top portions 51 and 61 of the upper protrusion 43 and the lower protrusion 44 in the radial direction, and is located further inside than the bottom portion of the circumferential groove 40. The width of the top portion 65 in the bottle axis O direction is narrower than the top portions 51 and 61 of the upper protrusion 43 and the lower protrusion 44. Further, the top 65 is shorter in the circumferential direction than the tops 51 and 61 of the upper protrusion 43 and the lower protrusion 44. In this case, of the top portion 65, the outer peripheral edge located on the outer side in the circumferential direction is connected to the vertical side wall portion 32a from the inner side in the circumferential direction, and the inner peripheral edge located on the inner side in the circumferential direction is the circumference of the top portions 51 and 61. It is located on the outer side in the circumferential direction from the inner peripheral edge located on the inner side in the direction.
The inner peripheral wall portion 66 is inclined toward the inner side in the circumferential direction from the outer side in the radial direction toward the inner side.

このように、本実施形態の突部４２は、周溝４０の開口周縁部に連設されるとともに、連結突部４５の頂部６１と、上突部４３及び下突部４４の横周壁部５２ｂ，６２ｂと、により画成された部分が周溝４０に連通する延長周溝７１を構成している。なお、図示の例において、延長周溝７１は、周溝４０に比べてボトル軸Ｏ方向の幅が広く、径方向の深さが深くなっている。 As described above, the protrusion 42 of the present embodiment is connected to the peripheral edge of the opening of the circumferential groove 40, and the top 61 of the connection protrusion 45, and the lateral peripheral wall 52b of the upper protrusion 43 and the lower protrusion 44. , 62b constitutes an extended circumferential groove 71 that communicates with the circumferential groove 40. In the illustrated example, the extended circumferential groove 71 is wider in the bottle axis O direction and deeper in the radial direction than the circumferential groove 40.

また、パネル底壁部３１のうち、ボトル軸Ｏ方向における上突部４３及び下突部４４間であって、連結突部４５に対して周方向の内側に連なる部分には、径方向の内側に向けて窪む凹部７２が形成されている。凹部７２は、径方向から見た側面視において周方向に沿って延びる長方形状を呈している。凹部７２のうち、周方向の外側端縁は上述した連結突部４５の内側周壁部６６に周方向の内側から連なり、周方向の内側端縁は上突部４３及び下突部４４の縦周壁部５２ａ，６２ａよりも周方向の内側に位置している。
また、凹部７２のうち、ボトル軸Ｏ方向の両端縁は上突部４３及び下突部４４における横周壁部５２ｂ，６２ｂにボトル軸Ｏ方向の内側から連なっている。 In addition, a portion of the panel bottom wall portion 31 that is between the upper protrusion 43 and the lower protrusion 44 in the bottle axis O direction and that is connected to the inner side in the circumferential direction with respect to the connection protrusion 45 is radially inward. A recess 72 that is recessed toward is formed. The concave portion 72 has a rectangular shape extending along the circumferential direction in a side view as viewed from the radial direction. Of the recess 72, the outer peripheral edge in the circumferential direction is connected to the inner peripheral wall portion 66 of the connecting protrusion 45 from the inner side in the circumferential direction, and the inner peripheral edge in the circumferential direction is the vertical peripheral wall of the upper protrusion 43 and the lower protrusion 44. It is located on the inner side in the circumferential direction than the portions 52a and 62a.
Further, both end edges of the recess 72 in the bottle axis O direction are connected to the lateral peripheral wall portions 52 b and 62 b of the upper protrusion 43 and the lower protrusion 44 from the inner side in the bottle axis O direction.

このように、本実施形態では、縦側壁部３２ａとパネル底壁部３１との接続部分Ｒに、径方向の外側に向けて突出する突部４２が形成されている構成とした。
この構成によれば、例えば内容物の充填時において、ボトル１に対してボトル軸Ｏ方向の圧縮力（ボトル軸Ｏ方向への荷重）が加えられた際、接続部分Ｒに作用するボトル軸Ｏ方向の圧縮力が突部４２と、縦側壁部３２ａ及びパネル底壁部３１と、の境界部分に沿って及ぼされることになる。すなわち、接続部分Ｒに作用するボトル軸Ｏ方向の圧縮力を径方向や周方向に分散させることが可能になり、接続部分Ｒが径方向の外側に向けて膨出して、胴部１３の座屈の起点になるのを抑制できる。 Thus, in this embodiment, it was set as the structure by which the protrusion part 42 which protrudes toward the outer side of radial direction was formed in the connection part R of the vertical side wall part 32a and the panel bottom wall part 31. As shown in FIG.
According to this configuration, for example, when the contents are filled, when a compressive force in the bottle axis O direction (load in the bottle axis O direction) is applied to the bottle 1, the bottle axis O acting on the connection portion R is applied. The compressive force in the direction is exerted along the boundary portion between the projecting portion 42, the vertical side wall portion 32a and the panel bottom wall portion 31. That is, the compressive force in the bottle axis O direction acting on the connecting portion R can be dispersed in the radial direction and the circumferential direction, and the connecting portion R bulges outward in the radial direction, It can suppress becoming the starting point of bending.

本実施形態では、胴部１３に周溝４０が形成されているため、胴部１３の剛性を確保し、流通時やラインプレッシャ―等、胴部１３に径方向の内側に向けて応力が作用した場合の胴部１３の径方向の内側に向けた過大な変形を抑制できる。そして、本実施形態では、縦側壁部３２ａのうちボトル軸Ｏ方向の圧縮力が加えられたときに応力が集中し易い周溝４０の開口周縁部に突部４２が連なって形成されているため、上述した応力を、突部４２と、縦側壁部３２ａ及びパネル底壁部３１と、の境界部分に沿って分散させることができる。これにより、胴部１３の変形を確実に抑制できる。 In the present embodiment, since the circumferential groove 40 is formed in the body portion 13, the rigidity of the body portion 13 is ensured, and stress acts on the body portion 13 inward in the radial direction during distribution, line pressure, or the like. The excessive deformation | transformation toward the inner side of the radial direction of the trunk | drum 13 at the time of doing can be suppressed. And in this embodiment, since the protrusion 42 is continued and formed in the opening peripheral part of the circumferential groove 40 where stress is easy to concentrate when the compressive force of the bottle axis | shaft O direction is applied among the vertical side wall parts 32a. The stress described above can be distributed along the boundary portion between the projecting portion 42, the vertical side wall portion 32a and the panel bottom wall portion 31. Thereby, the deformation | transformation of the trunk | drum 13 can be suppressed reliably.

さらに、本実施形態では、上突部４３及び下突部４４間を連結するとともに、上突部４３及び下突部４４の頂部５１，６１よりも径方向の内側に位置する連結突部４５を有しているため、突部４２の剛性を確保し、胴部１３の変形を確実に抑制できる。 Furthermore, in this embodiment, while connecting between the upper protrusion 43 and the lower protrusion 44, the connection protrusion 45 located inside radial direction rather than the top parts 51 and 61 of the upper protrusion 43 and the lower protrusion 44 is provided. Since it has, the rigidity of the protrusion 42 is ensured and the deformation | transformation of the trunk | drum 13 can be suppressed reliably.

しかも、本実施形態では、パネル底壁部３１に凹部７２が形成されているため、例えば内容物の加熱充填時において、パネル底壁部３１が径方向の外側に膨出変形するのを抑制できる。 In addition, in the present embodiment, since the recess 72 is formed in the panel bottom wall portion 31, for example, when the contents are heated and filled, the panel bottom wall portion 31 can be prevented from bulging and deforming outward in the radial direction. .

以上、本発明の実施形態について図面を参照して詳述したが、具体的な構成はこの実施形態に限られるものではなく、本発明の要旨を逸脱しない範囲の設計変更等も含まれる。
上述した実施形態では、突部４２の頂部５１，６１（径方向の外側を向く外面）が胴部１３（主壁部２１）の外面に対して径方向の内側に位置する構成について説明したが、これに限られない。例えば、図５、図６に示すように、上突部４３及び下突部４４の頂部５１，６１と、胴部１３（主壁部２１）の外面と、が段差なく連なっていても構わない。
この構成によれば、接続部分Ｒに作用するボトル軸Ｏ方向の圧縮力が、径方向に分散された後、主壁部２１の外面に及ぼされることになる。これにより、接続部分Ｒに作用するボトル軸Ｏ方向の圧縮力を突部４２で分断させることが可能になり、胴部１３の変形を確実に抑制できる。 As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the concrete structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.
In the above-described embodiment, the configuration has been described in which the top portions 51 and 61 (outer surfaces facing the outer side in the radial direction) of the protrusion 42 are positioned on the inner side in the radial direction with respect to the outer surface of the trunk portion 13 (the main wall portion 21). Not limited to this. For example, as shown in FIGS. 5 and 6, the top portions 51 and 61 of the upper protrusion 43 and the lower protrusion 44 and the outer surface of the trunk portion 13 (main wall portion 21) may be connected without a step. .
According to this configuration, the compressive force in the bottle axis O direction acting on the connection portion R is distributed in the radial direction and then exerted on the outer surface of the main wall portion 21. Thereby, it becomes possible to divide the compressive force of the bottle axis | shaft O direction which acts on the connection part R with the protrusion 42, and can suppress the deformation | transformation of the trunk | drum 13 reliably.

なお、突部４２の頂部５１，６１が主壁部２１ではなく、胴部１３の隅角壁部２２に連なる構成としても構わない。すなわち、突部４２の頂部５１，６１は、胴部１３のうち周方向で隣り合うパネル部２３同士の間に位置する部分の外面に連なっていれば構わない。
また、上突部４３及び下突部４４の頂部５１，６１を胴部１３の外面よりも径方向の外側に配置しても構わない。 Note that the top portions 51 and 61 of the protrusion 42 may be connected to the corner wall portion 22 of the trunk portion 13 instead of the main wall portion 21. That is, the top parts 51 and 61 of the protrusion part 42 should just be continued with the outer surface of the part located between the panel parts 23 adjacent in the circumferential direction among the trunk | drum 13. FIG.
Further, the top portions 51 and 61 of the upper protrusion 43 and the lower protrusion 44 may be arranged on the outer side in the radial direction from the outer surface of the body portion 13.

また、図５、図６に示すように、連結突部４５の頂部６５を周溝４０の底部と面一に配置しても構わない。この構成によれば、周溝４０と延長周溝７１とが滑らかに連なることになるので、胴部１３の剛性を向上させることができる。 Further, as shown in FIGS. 5 and 6, the top 65 of the connecting projection 45 may be arranged flush with the bottom of the circumferential groove 40. According to this configuration, the circumferential groove 40 and the extended circumferential groove 71 are smoothly connected to each other, so that the rigidity of the trunk portion 13 can be improved.

上述した実施形態では、突部４２が上突部４３、下突部４４及び連結突部４５を有する構成について説明したが、これに限らず、これら上突部４３、下突部４４及び連結突部４５のうち何れかのみで突部４２を形成しても構わない。
また、同一の接続部分Ｒに、ボトル軸Ｏ方向に間隔をあけて複数の突部を配置しても構わない。
上述した実施形態では、上突部４３、下突部４４及び連結突部４５により延長周溝７１を画成する構成としたが、これに限らず、突部４２によって周溝４０を周方向で閉塞しても構わない。なお、周溝４０を設けない構成であっても構わない。 In the above-described embodiment, the configuration in which the protrusion 42 includes the upper protrusion 43, the lower protrusion 44, and the connection protrusion 45 has been described. However, the present invention is not limited thereto, and the upper protrusion 43, the lower protrusion 44, and the connection protrusion are not limited thereto. The protrusion 42 may be formed by only one of the portions 45.
In addition, a plurality of protrusions may be arranged on the same connection portion R at intervals in the bottle axis O direction.
In the embodiment described above, the extended circumferential groove 71 is defined by the upper protrusion 43, the lower protrusion 44, and the connection protrusion 45. However, the present invention is not limited to this, and the circumferential groove 40 is circumferentially formed by the protrusion 42. It may be occluded. In addition, the structure which does not provide the circumferential groove 40 may be sufficient.

なお、突部４２は、同一のパネル部２３に形成された一対の突部４２同士が周方向で離間していれば、その周方向の幅は適宜設計変更が可能である。但し、パネル部２３の減圧吸収性能を確保するためには、同一のパネル部２３に形成された突部４２間の周方向の間隔は広い方が好ましい。
上述した実施形態では、各主壁部２１にパネル部２３を一つずつ形成した場合について説明したが、これに限らず、各主壁部２１にパネル部２３を複数ずつ形成しても構わない。 In addition, as for the protrusion 42, if the pair of protrusion 42 formed in the same panel part 23 is mutually spaced apart in the circumferential direction, the design of the width of the circumferential direction can be changed suitably. However, in order to ensure the reduced pressure absorption performance of the panel portion 23, it is preferable that the circumferential interval between the protrusions 42 formed on the same panel portion 23 is wide.
In the embodiment described above, the case where one panel portion 23 is formed on each main wall portion 21 has been described. However, the present invention is not limited to this, and a plurality of panel portions 23 may be formed on each main wall portion 21. .

その他、本発明の趣旨を逸脱しない範囲で、上述した実施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、前記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 meaning of this invention, it is possible to replace suitably the component in the embodiment mentioned above by the well-known component, and you may combine the said modification suitably.

１…角形ボトル
１１…口部
１２…肩部
１３…胴部
１４…底部
２１…主壁部
２２…隅角壁部
２３…パネル部
３１…パネル底壁部
３２…側壁部
３２ａ…縦側壁部
４０…周溝
４２…突部 DESCRIPTION OF SYMBOLS 1 ... Square bottle 11 ... Mouth part 12 ... Shoulder part 13 ... Trunk part 14 ... Bottom part 21 ... Main wall part 22 ... Corner wall part 23 ... Panel part 31 ... Panel bottom wall part 32 ... Side wall part 32a ... Vertical side wall part 40 ... Circumferential groove 42 ... Projection

Claims

口部、肩部、胴部及び底部が合成樹脂材料で一体に形成されてなり、
前記胴部は、主壁部と隅角壁部とがボトル軸周りの周方向に交互に連設されて構成され、
前記主壁部には、ボトル軸方向から見た平面視においてボトル軸に直交する径方向の内側に向けて窪むパネル部が形成され、
前記パネル部は、
径方向の内側に位置するパネル底壁部と、
前記パネル底壁部の外周縁から径方向の外側に向けて延びる側壁部と、により画成され、
前記側壁部のうち周方向を向く縦側壁部と、前記パネル底壁部と、の接続部分には、径方向の外側に向けて突出する突部が形成され、
前記突部は、
上突部と、
下突部と、
前記上突部及び前記下突部間を接続する連結突部と、を有し、
前記連結突部は、周方向の長さが前記上突部及び前記下突部よりも短く、かつ前記上突部及び前記下突部よりも径方向の内側に位置し、
前記パネル底壁部のうち、ボトル軸方向における前記上突部及び前記下突部間であって、前記連結突部に対して周方向の内側に連なる部分には、前記パネル底壁部に対して径方向の内側に窪む凹部が形成されていることを特徴とする角形ボトル。
The mouth, shoulder, trunk and bottom are integrally formed of a synthetic resin material,
The body portion is configured by alternately connecting a main wall portion and a corner wall portion in a circumferential direction around the bottle axis,
The main wall portion is formed with a panel portion that is recessed toward the inside in the radial direction perpendicular to the bottle axis in a plan view seen from the bottle axis direction,
The panel portion is
A panel bottom wall located on the inside in the radial direction;
A side wall portion extending radially outward from the outer peripheral edge of the panel bottom wall portion,
A protrusion projecting outward in the radial direction is formed at a connection portion between the vertical side wall portion facing in the circumferential direction of the side wall portion and the panel bottom wall portion ,
The protrusion is
An upper protrusion,
A lower protrusion,
A connecting protrusion that connects between the upper protrusion and the lower protrusion;
The connecting protrusion is shorter in the circumferential direction than the upper protrusion and the lower protrusion, and is located on the radially inner side of the upper protrusion and the lower protrusion,
Of the panel bottom wall portion, between the upper protrusion and the lower protrusion in the bottle axial direction, the portion connected to the inner side in the circumferential direction with respect to the connection protrusion is And a concave portion that is recessed inward in the radial direction is formed .

前記突部の表面のうち径方向の外側を向く外面と、前記胴部のうち周方向で隣り合うパネル部同士の間に位置する部分の外面と、は段差なく連なっていることを特徴とする請求項１記載の角形ボトル。 Of the surface of the protrusion, the outer surface facing the outside in the radial direction and the outer surface of the portion located between the panel portions adjacent in the circumferential direction of the body portion are connected without a step. The square bottle according to claim 1.

前記胴部には、径方向の内側に向けて窪むとともに、周方向に延びる周溝が形成され、
前記突部は、前記縦側壁部における前記周溝の開口周縁部に連なって形成されていることを特徴とする請求項１又は請求項２記載の角形ボトル。 The body portion is recessed toward the inside in the radial direction, and a circumferential groove extending in the circumferential direction is formed,
The square bottle according to claim 1 or 2, wherein the protrusion is formed continuously with an opening peripheral edge of the peripheral groove in the vertical side wall.