201139216 . 六、發明說明： I：發明戶斤屬之技術領域3 發明領域 本發明係有關於一種瓶及裝有内容物之瓶。本申請案 係根據於2009年12月25日在日本申請之特願2009-296072 號主張優先權，將其内容援用於本文中。 L先前技術3 發明背景 在此類瓶方面，以往有例如下述專利文獻1所示之瓶内 壓為正壓的正壓瓶。該正壓瓶係例如裝有碳酸飲料或將内 ： 容物與氮氣一同充入，而在瓶内壓高於大氣壓的狀態下予 ' 以密封。如此之正壓瓶中，為了抑制瓶内壓上升造成的變 形（尤其是主體部向外側鼓出的變形），一般使用i體部橫截 面呈圓形的正壓瓶。 另一方面，最近，出於對設計多樣性的需要等，如下 述專利文獻2、3所示，有人提出於主體部設有橫截面為橢 圓形、方形部分的正壓瓶。另外，也有人提出沿瓶周方向 設置凹凸狀橫棱紋以提高耐壓性能的方法。 專利文獻1:日本國特開平10-264917號公報 專利文獻2:日本國特開2008-265838號公報 專利文獻3:日本國特開2008-7147號公報 I：發明内容3 3 201139216 發明概要 發明欲解決之課題 但是’就正壓瓶而言，—旦主體部橫截面的形狀形成 非圓幵y (例如四角形），則有可能由於瓶内塵引起的變形而無 法保持主體部的外觀形狀。例如，在主體部橫截面形成四 角形的方形瓶中，主體部四角的角部不易變形。因此，一 一瓶内壓作用時’應力會集中於處在相鄰的角部之間的主 體部面（尤其是寬度方向的中央部）。而且，在主體部之橫截 面中，由瓶内壓引起之朝徑向外側的變形量，在主體部面 之寬度方向（橫方向）的中央部分為最大，隨著從令央部分朝 向角部而逐漸變小。其結果，即使將正壓瓶的主體部成形 為四角形’也會由於瓶内正壓起作用，使得各主體部面的 中央。朝向外側鼓出’而讓主體部之橫截面呈圓形或 橢圓形。 #另外’即使假設在正壓瓶的四角形主體部上形成前述 的橫I紋’對於最内側部分(最位於徑向内側的部分)之橫截 面為四角形的橫稜紋而言，在橫稜紋的橫截面中，由瓶内 壓引起之朝徑向外側的變形量，在各邊的中央部分為最 大’並隨著從該中央部分朝角部而逐漸變小。因此，有可 能未充分地抑制主體部面中央部分的變形，而使瓶的 形狀無法保持四角形。 曰本發明係考慮到上述之既有問題，而設定發明目的為 提供一種瓶以及裝有内容物之瓶，其即使在瓶内壓為正壓 的情況下，主體部的外觀形狀亦可保持為四角形。 4 201139216 用以解決課題之手段 本發明所涉及的瓶，具有橫截面大致正方形的主體 部’且為有底筒狀瓶。而且，於前述主體部，於瓶軸方向 隔著間隔地形成有複數個朝瓶周方向延伸的凹狀橫稜紋。 而且，朝徑向内側凹入之前述橫稜紋之最内部份的橫截面 形成為圓形。而且，於前述主體部，在主體部面上形成有 沿著軸向延伸的凹狀縱稜紋，且前述主體部面係形成於前 述主體部之四角落之角部之間。 本發明所涉及之裝有内容物之瓶，係在瓶中密封有内 容物之裝有内容物之瓶。並且，前述瓶為本發明的瓶，且 瓶内壓高於大氣壓。 於本發明所涉及之瓶，其橫稜紋之最内側部分的橫截 面呈圓形。因此，在瓶内壓為正壓時，橫稜紋在全周上微 小且均勻地變形。亦即，於本發明所涉及之瓶，最内側部 分之橫截面呈圓形的橫稜紋的變形量，小於最内側部分之 橫截面呈四角形(正方形）的橫稜紋的最大變形量(各邊之中 央部分的變形量因此，利用前述橫稜紋，能夠有效地抑 制在橫截面大致正方形之域部之各主體部面處之因瓶内 壓所引起的變形。另外，利用縱稜紋，能夠抑制在主體部 之主體部面處之朝徑向的鼓出變形。 ▲另卜》本發明所涉及之瓶，在前述主體部的橫斷面， 前述主體部之四角落之角部宜形成為朝徑向外側凸出的圓 弧狀。 藉此，可緩和朝主體部之主體部面的應力集中’在主 201139216 體部的橫截面，可抑制於主體部之各主體部面之中央部分 處的變形量。從而，在主體部之角部處的變形量與在主體 部之各主體部面之中央部分處的變形量，其差距變小。 另外，本發明所涉及之裝有内容物之瓶，其瓶内壓宜 為0.2MPa以上且0.8MPa以下。 藉此，可有效發揮上述功效。 發明效果 根據本發明所涉及之瓶及裝有内容物之瓶，利用最内 側部分之橫截面呈圓形的橫稜紋，能夠有效地抑制在橫截 面大致正方形之主體部之各主體部面之中央部分處的變 形。因此即使在瓶内壓為正壓的情況下，主體部的外觀形 狀亦可保持為四角形。 圖式簡單說明 第1圖為瓶的側視圖。 第2圖為第1圖所示A-A之間的橫截面圖。 第3圖為瓶的側視圖。 第4圖為第3圖所示B-B之間的橫截面圖。 I：實施方式3 較佳實施例之詳細說明 首先，就第1圖、第2圖所示的瓶1進行說明。 第1圖所示的鏈線Ο表示瓶1的中心軸線，以下記載為 「軸線0」。另外，令沿著軸線Ο的方向為「軸向」，與軸線 0正交的方向為「徑向」，環繞軸線0的方向為「周方向」。 並且，令軸向之口部5側（第1圖中的上側）為「上方」，其相 6 201139216 反側即軸向的底部3側（第1圖中的下側)為「下方」。 ，第1圖所示的瓶1為容納内容物的有底筒狀容器，其係 •，上方俯視時大致正方形（角部為圓弧狀)的方形瓶。該瓶 ^例如聚對苯二甲酸乙：g|(pET)等合成樹脂構成的樹 曰製構件。並且，瓶1係以射出成形作成瓶胚(無圖示)後， 將該瓶胚經吹塑成形而成。 正如果詳細說明，則如第1圖所示，瓶1係具有：沿軸線0 ^伸而大致方形筒狀的主體部2 ;與該主體部2下端接連而 "又的底部3;與該主體部2上端接連而設的肩部4;及豎立設置 在肩部4上端的口部5。該主體部2、底部3、肩部4及口部5 互相連通並且形成為一體。 如第1圖、第2圖所示，主體部2係橫截面大致正方形的 方形筒狀的筒部，以軸線〇為中心軸線沿著軸向延伸設置。 亦即’主體部2具備：沿著軸向延伸之四角落的角部2〇;及 鄰的角。卩2〇、20之間形成之四面的主體部面21。於主 體^2的4讀面中’上述四角落的角部2G分別形成為朝徑向 卜側凸出的圓弧狀。另外’上述四面的主體部面21分別开》 成相同形狀。 另外，在主體部2上，複數個朝瓶周方向延伸之凹狀橫 稜紋2 2隔相隔地形成於主鮮2之軸向。關隔宜為等間 隔。橫稜紋22係朝徑向内側凹入並於全周上延伸的環狀凹 溝°而且’橫稜紋22之最内側部分23的橫截面係形成為圓 开/另外彳F'稜紋22之最内側部分23的外徑與主體部2之主 體部面21之寬度方向(橫向）之中央部分％處的外徑相等。另 201139216 外，橫稜紋22之最内側部分23的外面與主體部2之主體部面 21之中央部分24的外面形成在同一面上。亦即，橫稜紋 具有在主體部2的四角落朝經向内側凹人的橫截面。而且， 橫稜紋22的溝深（凹人量)在主體部2之角部2⑽巾央部分為 最大，隨著從角部20的中央部分朝向主體部面21的中央部 分24而逐漸變小。 底部3係職面大致正方形之有底筒狀的筒部。而且， 在底部3之下端部之四角落的角部，分別設有朝轴向下 出的腳部30。 * 係隨著㈣向上方而直徑逐漸縮小之錐狀筒部， 截面形成為大致正方形。而且，肩部4之縱截面 瓶外側凸出的圓弧狀。 成為 口。P5係以轴線〇為中心軸線朝軸向上側突出之大致圓 H的筒部°而且’於口部5的外周面形成有用於螺合瓶蓋 (·，.、圖示）的外螺紋50。 接著，就由上述結構構成之瓶1的作用進行說明。 :在上述之瓶1中填充碳酸飲料、或者與内容物一起充入 二後左由在°部5安裝瓶蓋（無圆示），可得到内容物 2封於瓶1之裝有内容物之瓶。此時，瓶1的内壓會上升， ^仔比大乳壓還高而成為正壓（例如〇.2MPa以± j_〇 8MPa 對:)的1:;:體部2之内側朝徑向外側的壓力(内壓) 之幸2 用。此時，橫截面大致正方形之主體部2 制…部Γ 21之朝徑向外側的鼓出變形被横稜紋2 2所抑 ' 由於祸稜紋22之最内側部分23的橫截面呈圓 8 201139216 形，故壓力微小且均勻地作用於橫稜紋22之全周上，而可 抑制橫稜紋22之變形。因此，藉由橫稜紋22可有效地抑制 由瓶内壓所引起之主體部面21的變形，讓主體部面21之中 央部分24的變形量變小。 另外，上述之主體部2之四角落的角部2〇在主體部2之 橫截面中形成為朝徑向外側凸出的圓弧狀。因此，當正内 壓作用於主體部2時，對主體部面21的應力集中得以緩和。 其結果，可抑制主體部面21之中央部分24處的變形量。於 是，在主體部2之角部20處的變形量與在主體部2之各主體 部面21之中央部分24處的變形量的差距變小。 根據上述之瓶1 ’藉由最内側部分23之橫截面呈圓形的 丰只才欠、、文22，可有效地抑制在橫截面大致正方形之主體部2之 主體部面21之中央部分24處的變形。因此即使在瓶内壓為 正壓的情況下，主體部2的外觀形狀亦可保持為四角形。 另外，由於主體部2之四角落的角部2〇形成圓弧狀，故 可抑制主體部面21之中央部分24處的變形量。因此即使在 較大的正内壓作用於主體部2的情況下，主體部2的外觀形 狀亦可確實地保持為四角形。 而且，在裝有内容物之瓶的瓶1内壓為〇.2MPa以上且 〇.8MPa以下時，可有效發揮前述的效果。 接著，就第3圖、第4圖所示的瓶101進行說明。 又，對於與上述之第1圖、第2圖所示的瓶丨相同的結 構，係標注相同的符號並省略其說明。 如第3圖、第4圖所示，於主體部2,在主體部2之轴向 201139216 隔著間隔地形成有複數個朝瓶周方向延伸的凹狀橫稜紋 122。此外，於主體部2形成有沿著主體部2之軸向延伸的凹 狀縱稜紋125。 橫稜紋122係朝徑向内側凹入且在全周上延伸的環狀 凹溝。而且’橫稜紋122之最内側部分123的橫截面形成為 圓形。另外’橫稜紋122之最内側部分123，係形成為在全 周上與主體部面21的外面相比更靠近徑向内侧者。 縱稜紋125 ’係朝徑向内側凹入並且沿轴向延伸的直線 狀凹溝。而且縱棱紋125係配設在主體部面21之寬度方向的 中央部分。縱棱紋125從主體部2的上端（肩部4的下端）延伸 設置到主體部2的下端（底部3的上端），且分別形成在主體部 2的4個主體部面21上。另外，縱稜紋125之最内側部分126 的外面以及橫棱紋122之最内側部分123的外面，兩者在與 橫稜紋122的交叉部分處位於同一面上。 於上述之瓶101，在主體部2之主體部面21上形成有縱 稜紋125。因此當正内壓從主體部2的内側作用於主體部面 21時’可藉由縱稜紋125抑制主體部面21之朝徑向的變形。 藉此，即使在較大的正内壓作用於主體部2的情況下，主體 部2的外觀形狀亦可確實地保持為四角形。 接著，就上述之作用效果之驗證試驗進行說明。 採用第1圖及第2圖所示之瓶1作為比較例，採用第3圖 及第4圖所示之瓶1〇1作為實施例，將比較例之瓶1中於主體 部2上不具有橫稜紋22的瓶採用作為習知例。該等比較例、 實施例及習知例之各瓶採用了可填充500ml内容物的尺寸。 10 201139216 然後，以模擬方法算出了對各瓶施加正内壓〇.5MPa時 之於主體部面上之寬度方向之中央部分的外徑增加率（以 下稱之為正面外徑變化）、以及瓶的内容積增加率（以下稱之 為體積變化）。 其結果，在正面外#變化方面，相對於習知例的 13.4%，比較例為4.0%(習知例的29.9%) ’實施例為1.5%(習 知例的11.2%)。亦即，確認了與習知例的瓶相較之下，比 較例及實施例的瓶能夠降低正面外徑變化。 另外，在體積變化方面，相對於習知例的6 7%，比較 例為3.8%(習知例的56 7%)，實施例為4 9%(習知例的 73.1 /〇)。亦即，確認了比較例及實施例的瓶比習知例的瓶 更能抑制體積變化。 以上，雖然就第1圖、第2圖所示的瓶1及第3圖、第4圖 所不的瓶101進行了說明，但是本發明不侷限於上述之實扩 〜樣在不脫離其要旨的範圍内牙適當地進行變更。 例如，在上述之第1圖、第2圖所示的瓶1中，橫棱蝮22 之最内側部分23的外面與主體部2之主體部面21之中央部 分24的外面形成在同-面上，是本發明也可以令橫後^ 22之最内側部分23的外面比主體部2之主體部面21之中央 的外面更位於徑向内側，使橫棱紋22呈在全周上凹 入的形狀。 另外，在上述之第3圖、第4圏所示的瓶101中，在主體 部面21之寬度方向之中央部分配設有縱稜紋125。然而，本 也可以是在主體部面21之寬度方向之中央部分以外的 201139216 位置形成有縱稜紋125。例如，也可以在主體部面21之寬度 方向之中央部分的兩側分別形成有縱梭紋。 另外，在上述之第3圖、第4圖所示的瓶1〇1中’縱稜紋 125從主體部2的上端（肩部4的下端）延伸設置到主體部2的 下端（底部3的上端）。然而，縱稜紋125的長度可以適當地變 更，也可以只在主體部2之軸向的一部分上形成有縱稜紋。 或者，縱稜紋的上端也可以延伸設置到肩部4的外周面。或 者，縱棱紋的下端也可以延伸設置到底部3的外周面。例 如，如果縱棱紋的上端延伸設置到肩部4的外周面且縱棱紋 的下端延伸設置到底部3的外周面，則在正内壓作用於主體 部2時，可進一步抑制主體部面21之朝徑向外側的變形。於 是，主體部2的外觀形狀可更加確實地保持為四角形。 此外，在不脫離本發明要旨的範圍内，可以將在上述 之實施態樣中的構成要素適當地替換成—般習知的構成要 素。另外，也可以適當地組合上述之變形例。 產業利用性 本發明所涉及之瓶及裝有内容物之瓶， 你藉由最内 邛分之橫截面形成為圓形之橫稜紋，而有欵抑制在生 大致正方形之主體部之各主體部面之中央邹八 铖截 因此，依據本發明之瓶及裝有内容物之瓶，自的灸形 為正壓時’主體部的外觀形狀仍可保持為四^吏在瓶内 【囫式簡單說明】 夕 第1圖為瓶的側視圖。 第2圖為第i圖所示A_A之間的橫截面圖 12 201139216 第3圖為瓶的側視圖。 第4圖為第3圖所示B-B之間的橫截面圖。 【主要元件符號說明】 1…瓶 2.. .主體部 20.. .角部 21.. .主體部面 22."橫棱紋 23.. .橫棱紋22之最内側部分 24.. .中央部分 3.. .底部 30.. .腳部 4.. .肩部 5··.口部 50.. .瓶蓋的外螺紋 101 ...瓶 122 ...橫稜紋 123…橫棱紋122之最内側部分 125 .·.縱棱紋 126…縱棱紋125之最内側部分 0...瓶1的中心軸線 13201139216 . VI. Description of the invention: I: Technical field of inventions 3 Field of the Invention The present invention relates to a bottle and a bottle containing the contents. The present application claims priority from Japanese Patent Application No. 2009-296072, filed on Jan. In the prior art, for example, a positive pressure bottle having a positive internal pressure of the bottle as shown in the following Patent Document 1 is known. The positive pressure bottle is, for example, filled with a carbonated beverage or filled with a container containing nitrogen gas, and sealed at a pressure higher than atmospheric pressure in the bottle. In such a positive pressure bottle, in order to suppress deformation caused by an increase in the internal pressure of the bottle (especially, deformation of the main body portion bulging outward), a positive pressure bottle having a circular cross section of the i body is generally used. On the other hand, recently, as shown in Patent Documents 2 and 3 below, it has been proposed to provide a positive pressure bottle having an elliptical or square cross section in the main body portion, as shown in the following Patent Documents 2 and 3. Further, there has been proposed a method of providing uneven transverse ribs along the circumference of the bottle to improve the withstand voltage performance. Patent Document 1: Japanese Laid-Open Patent Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. 2008-265838. Patent Document No. JP-A-2008-265838. The problem to be solved is that, in the case of a positive pressure bottle, if the shape of the cross section of the main body portion is formed into a non-circular shape y (for example, a square shape), there is a possibility that the shape of the main body portion cannot be maintained due to deformation due to dust inside the bottle. For example, in a square bottle in which a cross section of a main body portion is formed in a square shape, corner portions of the four corners of the main body portion are not easily deformed. Therefore, the stress is concentrated on the main body portion (especially the central portion in the width direction) between the adjacent corner portions when the internal pressure of one bottle is applied. Further, in the cross section of the main body portion, the amount of deformation in the radially outer side caused by the internal pressure of the bottle is maximized in the central portion in the width direction (lateral direction) of the main body portion surface, with the corner portion being turned toward the corner portion. And gradually getting smaller. As a result, even if the main body portion of the positive pressure bottle is formed into a square shape, the positive pressure in the bottle acts to center the main body surface. The body portion is bulged toward the outside and the cross section of the body portion is circular or elliptical. #其他的" Even if it is assumed that the above-mentioned transverse I-pattern is formed on the square main body portion of the positive pressure bottle, the transverse rib is crossed in the cross section of the innermost portion (the portion located most radially on the inner side). In the cross section, the amount of deformation toward the radially outer side caused by the internal pressure of the bottle is the largest in the central portion of each side and gradually decreases from the central portion toward the corner portion. Therefore, it is possible that the deformation of the central portion of the main body surface is not sufficiently suppressed, and the shape of the bottle cannot be maintained in a square shape. The present invention has been made in view of the above problems, and an object of the invention is to provide a bottle and a bottle containing the contents, which can maintain the appearance of the main body portion even when the pressure inside the bottle is positive pressure. Quadrangular. 4 201139216 Means for Solving the Problem A bottle according to the present invention has a main body portion having a substantially square cross section and is a bottomed cylindrical bottle. Further, in the main body portion, a plurality of concave transverse ribs extending in the circumferential direction of the bottle are formed at intervals in the direction of the bottle axis. Further, the cross section of the innermost portion of the aforementioned transverse ribs recessed inward in the radial direction is formed in a circular shape. Further, in the main body portion, a concave longitudinal rib extending in the axial direction is formed on the main body portion, and the main body portion surface is formed between the corner portions of the four corners of the main body portion. The bottle containing the contents according to the present invention is a bottle containing the contents sealed in the bottle. Further, the aforementioned bottle is the bottle of the present invention, and the internal pressure of the bottle is higher than atmospheric pressure. In the bottle according to the present invention, the innermost portion of the transverse rib is circular in cross section. Therefore, when the pressure inside the bottle is a positive pressure, the transverse ribs are slightly and uniformly deformed over the entire circumference. That is, in the bottle according to the present invention, the deformation amount of the transverse ribs having a circular cross section in the innermost portion is smaller than the maximum deformation amount of the transverse ribs having the quadrangular (square) cross section of the innermost portion (each Therefore, the amount of deformation of the central portion of the side can effectively suppress the deformation caused by the internal pressure of the bottle at each of the main body portions of the domain portion having a substantially square cross section by the transverse ribs. It is possible to suppress the bulging deformation in the radial direction at the main body surface of the main body portion. ▲In addition, in the bottle according to the present invention, in the cross section of the main body portion, the corner portions of the four corners of the main body portion are preferably formed. It is an arc shape that protrudes outward in the radial direction. Thereby, the stress concentration toward the main body surface of the main body portion can be alleviated'. The cross section of the body portion of the main 201139216 can be suppressed to the central portion of each main body portion of the main body portion. Therefore, the amount of deformation at the corner portion of the main body portion is smaller than the amount of deformation at the central portion of each main body portion surface of the main body portion. Further, the contents of the present invention are contained. Bottle The internal pressure is preferably 0.2 MPa or more and 0.8 MPa or less. Thereby, the above-described effects can be effectively exhibited. Advantageous Effects of Invention According to the bottle and the contents-containing bottle of the present invention, the cross section of the innermost portion is circular in cross section. The ribs can effectively suppress deformation at the central portion of each of the main body portions of the main body portion having a substantially square cross section. Therefore, even when the pressure inside the bottle is positive, the outer shape of the main body portion can be maintained in a quadrangular shape. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side view of the bottle. Fig. 2 is a cross-sectional view between AA shown in Fig. 1. Fig. 3 is a side view of the bottle. Fig. 4 is a BB shown in Fig. 3. Cross-sectional view between the first embodiment I. Embodiment 3 Description of the preferred embodiment First, the bottle 1 shown in Fig. 1 and Fig. 2 will be described. The chain line 第 shown in Fig. 1 indicates the bottle 1 The central axis is hereinafter referred to as "axis 0." Further, the direction along the axis Ο is "axial direction", the direction orthogonal to the axis 0 is "radial direction", and the direction around the axis 0 is "circumferential direction". Further, the axial side portion 5 (upper side in Fig. 1) is made "upper" On the reverse side, the bottom 3 side of the axial direction (the lower side in the first figure) is "below". The bottle 1 shown in Fig. 1 is a bottomed cylindrical container containing contents. It is a square bottle which is substantially square (the corner is an arc shape) when viewed from above. The bottle is a tree-shaped member made of a synthetic resin such as polyethylene terephthalate: g|(pET). 1 is formed by injection molding into a preform (not shown), and then the preform is blow molded. As will be described in detail, as shown in Fig. 1, the bottle 1 has an extension along the axis 0 ^ a substantially square tubular main body portion 2; a bottom portion 3 connected to the lower end of the main body portion 2; a shoulder portion 4 provided in connection with the upper end of the main body portion 2; and a mouth portion 5 erected at an upper end of the shoulder portion 4 The main body portion 2, the bottom portion 3, the shoulder portion 4, and the mouth portion 5 communicate with each other and are formed integrally. As shown in Fig. 1 and Fig. 2, the main body portion 2 is a tubular tubular portion having a substantially square cross section, and extends in the axial direction with the axis 〇 as a central axis. That is, the main body portion 2 has a corner portion 2〇 at four corners extending in the axial direction; and an adjacent corner. The main body surface 21 formed on the four sides between 卩2〇 and 20. In the four reading faces of the main body ^2, the corner portions 2G of the four corners are formed in an arc shape which is convex toward the radial side. Further, the main body surface 21 of the above four faces is formed into the same shape. Further, in the main body portion 2, a plurality of concave ribs 2 2 extending in the circumferential direction of the bottle are formed in the axial direction of the main fresh 2 in a space. The interval should be equal. The transverse rib 22 is an annular groove which is recessed radially inward and extends over the entire circumference, and the cross section of the innermost portion 23 of the transverse rib 22 is formed to be rounded/another 彳F' rib 22 The outer diameter of the innermost portion 23 is equal to the outer diameter at the central portion % of the width direction (lateral direction) of the main body portion surface 21 of the main body portion 2. Further, in addition to 201139216, the outer surface of the innermost portion 23 of the transverse rib 22 is formed on the same surface as the outer surface of the central portion 24 of the main body portion 21 of the main body portion 2. That is, the transverse ribs have a cross section which is recessed toward the inner side at the four corners of the main body portion 2. Further, the groove depth (concave amount) of the transverse rib 22 is the largest at the center portion of the corner portion 2 (10) of the main body portion 2, and becomes smaller as it goes from the central portion of the corner portion 20 toward the central portion 24 of the main body portion surface 21. . The bottom 3 series has a substantially square bottomed tubular portion. Further, at the corners of the four corners of the lower end portion of the bottom portion 3, leg portions 30 which are axially downward are respectively provided. * A tapered tubular portion whose diameter gradually decreases with (4) upward, and the cross section is formed into a substantially square shape. Further, the longitudinal section of the shoulder portion 4 has an arc shape convex outward. Become a mouth. P5 is a cylindrical portion of a substantially circular shape H that protrudes upward in the axial direction with the axial axis as a central axis, and an external thread 50 for screwing the cap (·, Fig.) is formed on the outer peripheral surface of the mouth portion 5 . Next, the action of the bottle 1 configured as described above will be described. : The bottle 1 is filled with a carbonated beverage, or the container is filled with the contents, and the bottle cap is attached to the portion 5 (not shown), and the contents 2 are sealed in the contents of the bottle 1. bottle. At this time, the internal pressure of the bottle 1 will rise, and the height of the bottle 1 will be higher than the large milk pressure and become a positive pressure (for example, 〇2 MPa to ± j 〇 8 MPa vs. :); The external pressure (internal pressure) is fortunate. At this time, the bulging deformation of the main portion 2 of the substantially square portion having a substantially square cross section on the radially outer side is suppressed by the transverse rib 2 2 because the cross section of the innermost portion 23 of the rib 22 is rounded 8 Since the shape is 201139216, the pressure acts minutely and uniformly on the entire circumference of the transverse rib 22, and the deformation of the transverse rib 22 can be suppressed. Therefore, the deformation of the main body surface 21 caused by the internal pressure of the bottle can be effectively suppressed by the transverse ribs 22, and the amount of deformation of the central portion 24 of the main body portion surface 21 can be made small. Further, the corner portion 2 of the four corners of the main body portion 2 described above is formed in an arc shape which is convex outward in the radial direction in the cross section of the main body portion 2. Therefore, when the positive internal pressure acts on the main body portion 2, the stress concentration on the main body portion surface 21 is alleviated. As a result, the amount of deformation at the central portion 24 of the main body portion surface 21 can be suppressed. Therefore, the difference between the amount of deformation at the corner portion 20 of the main body portion 2 and the amount of deformation at the central portion 24 of each main body portion surface 21 of the main body portion 2 becomes small. According to the bottle 1' described above, the central portion 24 of the main body portion 21 of the main body portion 2 having a substantially square cross section can be effectively suppressed by the circular portion of the innermost portion 23 having a circular cross section. The deformation at the place. Therefore, even in the case where the pressure inside the bottle is a positive pressure, the outer shape of the main body portion 2 can be maintained in a square shape. Further, since the corner portions 2 of the four corners of the main body portion 2 are formed in an arc shape, the amount of deformation at the central portion 24 of the main body portion surface 21 can be suppressed. Therefore, even in the case where a large positive internal pressure acts on the main body portion 2, the outer shape of the main body portion 2 can be surely maintained in a quadrangular shape. Further, when the internal pressure of the bottle 1 containing the bottle of the contents is 〇2 MPa or more and 〇. 8 MPa or less, the above effects can be effectively exhibited. Next, the bottle 101 shown in Fig. 3 and Fig. 4 will be described. The same components as those of the above-described first and second embodiments are denoted by the same reference numerals, and their description will be omitted. As shown in Fig. 3 and Fig. 4, in the main body portion 2, a plurality of concave transverse ribs 122 extending in the circumferential direction of the bottle are formed at intervals in the axial direction 201139216 of the main body portion 2. Further, a concave longitudinal rib 125 extending in the axial direction of the main body portion 2 is formed in the main body portion 2. The transverse ribs 122 are annular grooves that are recessed radially inward and extend over the entire circumference. Further, the cross section of the innermost portion 123 of the transverse rib 122 is formed in a circular shape. Further, the innermost portion 123 of the transverse rib 122 is formed to be closer to the radially inner side than the outer surface of the main body portion surface 21 over the entire circumference. The longitudinal ribs 125' are linear grooves that are recessed toward the radially inner side and extend in the axial direction. Further, the vertical ribs 125 are disposed at the central portion in the width direction of the main body portion surface 21. The longitudinal ribs 125 are provided from the upper end of the main body portion 2 (the lower end of the shoulder portion 4) to the lower end of the main body portion 2 (the upper end of the bottom portion 3), and are formed on the four main body portion faces 21 of the main body portion 2, respectively. Further, the outer surface of the innermost portion 126 of the longitudinal rib 125 and the outer surface of the innermost portion 123 of the transverse rib 122 are located on the same plane at the intersection with the transverse rib 122. In the bottle 101 described above, a longitudinal rib 125 is formed on the main body surface 21 of the main body portion 2. Therefore, when the positive internal pressure acts on the main body surface 21 from the inner side of the main body portion 2, the radial deformation of the main body surface 21 can be suppressed by the vertical ribs 125. Thereby, even in the case where a large positive internal pressure acts on the main body portion 2, the outer shape of the main body portion 2 can be surely maintained in a quadrangular shape. Next, the verification test of the above-described effects will be described. The bottle 1 shown in Figs. 1 and 2 was used as a comparative example, and the bottle 1〇1 shown in Figs. 3 and 4 was used as an example, and the bottle 1 of the comparative example was not provided on the main body 2 in the first embodiment. The bottle of the transverse rib 22 is used as a conventional example. The bottles of the comparative examples, the examples, and the conventional examples were sized to fill 500 ml of the contents. 10 201139216 Then, the outer diameter increase rate (hereinafter referred to as front outer diameter change) of the central portion in the width direction of the main body surface when a positive internal pressure 〇.5 MPa was applied to each bottle was calculated by a simulation method, and a bottle was calculated by a simulation method. The rate of increase of the internal volume (hereinafter referred to as volume change). As a result, in terms of the change in front side #13%, the comparative example was 4.0% (29.9% of the conventional example) and the example was 1.5% (11.2% of the conventional example). Namely, it was confirmed that the bottle of the comparative example and the example can reduce the change in the front outer diameter as compared with the bottle of the conventional example. Further, in terms of volume change, compared with 6 7% of the conventional example, the comparative example was 3.8% (56 7% of the conventional example), and the example was 4 9% (the conventional example 73.1 /〇). Namely, it was confirmed that the bottles of the comparative examples and the examples were more resistant to volume change than the bottles of the conventional examples. Although the bottle 1 shown in Figs. 1 and 2 and the bottle 101 shown in Fig. 3 and Fig. 4 have been described above, the present invention is not limited to the above-described examples. The teeth within the range are appropriately changed. For example, in the bottle 1 shown in Figs. 1 and 2, the outer surface of the innermost portion 23 of the lateral rim 22 is formed on the same side as the outer surface of the central portion 24 of the main body surface 21 of the main body portion 2. Further, in the present invention, the outer surface of the innermost portion 23 of the lateral rear portion 22 may be located radially inward of the outer surface of the central portion of the main body portion surface 21 of the main body portion 2, so that the lateral rib 22 is concavely formed on the entire circumference. . Further, in the bottle 101 shown in Figs. 3 and 4, the vertical rib 125 is disposed in the central portion of the main body surface 21 in the width direction. However, it is also possible to form the vertical rib 125 at the position of 201139216 other than the central portion in the width direction of the main body portion surface 21. For example, a longitudinal wrap may be formed on both sides of the central portion in the width direction of the main body portion surface 21. Further, in the bottle 1〇1 shown in the third and fourth figures described above, the vertical rib 125 is extended from the upper end of the main body portion 2 (the lower end of the shoulder portion 4) to the lower end of the main body portion 2 (the bottom portion 3). Upper end). However, the length of the longitudinal rib 125 may be appropriately changed, and a longitudinal rib may be formed only on a part of the axial direction of the main body portion 2. Alternatively, the upper end of the longitudinal rib may also be extended to the outer peripheral surface of the shoulder 4. Alternatively, the lower end of the longitudinal rib may be extended to the outer peripheral surface of the bottom portion 3. For example, if the upper end of the longitudinal rib is extended to the outer peripheral surface of the shoulder portion 4 and the lower end of the longitudinal rib is extended to the outer peripheral surface of the bottom portion 3, the main body portion can be further suppressed when the positive internal pressure acts on the main body portion 2. The deformation of the outer side of the radial direction of 21 . Therefore, the outer shape of the main body portion 2 can be more reliably maintained in a square shape. Further, the constituent elements in the above-described embodiments can be appropriately replaced with the conventional constituent elements without departing from the gist of the invention. Further, the above-described modifications may be combined as appropriate. INDUSTRIAL APPLICABILITY The bottle and the bottle containing the contents of the present invention are formed into a circular cross rib by the innermost cross section, and the sputum suppresses each main body of the main body which is substantially square. Therefore, according to the bottle of the present invention and the bottle containing the contents, the shape of the main body portion can be kept in the bottle when the moxibustion shape is positive pressure. Brief Description] The first picture of the evening is the side view of the bottle. Figure 2 is a cross-sectional view between A_A shown in Figure ith. 12 201139216 Figure 3 is a side view of the bottle. Figure 4 is a cross-sectional view between B-B shown in Figure 3. [Main component symbol description] 1...bottle 2: main body 20.. corner part 21.. main body surface 22." transverse rib 23.. The innermost part of the transverse rib 22.. The central part 3: the bottom 30.. the foot 4: the shoulder 5 · · the mouth 50.. the external thread of the cap 101 ... bottle 122 ... horizontal ribs 123 ... horizontal The innermost portion of the rib 122 is 125. The longitudinal rib 126 is the innermost portion of the longitudinal rib 125. The center axis 13 of the bottle 1