200835627 九、發明說明 【發明所屬之技術領域】 本發明係關於具有頸縮部之瓶體，特別是關於爲了吸 收液體之體積減少所造成的減壓而具備嵌板（panel)之具有 ^ 頸縮部之瓶體。 【先前技術】 ^ 以往，關於用來收容飮料等的瓶體，已知有各種形狀 被提出。例如包含，將瓶體的上下方向之中間區域的直徑 縮小之所謂具有頸縮部之瓶體。具有頸縮部之瓶體，不僅 外觀美觀，且當使用者把持住瓶體之頸縮部分時，能將瓶 體確實的保持住。 飲料等的樹脂製容器，在收容飮料後會發生冷卻等的 溫度變化，這時因內部液體的體積減少等會使內部成爲減 壓狀態，可能造成容器之變形。爲了防止該現象，可在瓶 φ 體的表面設置減壓吸收用的嵌板。該嵌板，一般是從瓶體 的表面朝內部凹陷的構造之瓶壁。嵌板的形狀有許多種， 一般常採用由多角形所組合成的構造等。該嵌板，不僅可 遂行減壓吸收的目的，且能減少材料的使用量，又能提昇 ' 瓶體本身的強度，因此對容器而言相當重要。習知例係揭 示由三角形嵌板所組合而成者（參照專利文獻1 )。 此外，關於在瓶體側面設有嵌板之習知例，係在瓶體 側面設置朝上下方向延伸之矩形狀嵌板（參照專利文獻 2)。該習知例，爲了使瓶體周圍之標籤表面上印刷的文字 -4- 200835627 寺易於觀察’或爲了避免標簾表面上印刷的圖案％的設計 意象產生變化，係增多瓶體本體部之嵌板數而形成多角 形。 又’關於在瓶體側面設有嵌板之另一習知例，係在瓶 體側面設置變形長方形之嵌板，並在瓶體的上下方向之中 間附近設置橫肋（參照專利文獻3)。該習知例，利用橫肋 可提昇剛性，又藉由形成於各嵌板間之柱部，可抑制容器 之變形。 再者’另有一習知之瓶體，其爲了保持瓶體外觀爲平 滑的曲面’並未在表面設置嵌板，又爲了保持剛性，而設 有山部和谷部在周方向交互排列之段差（參照專利文獻 4) 〇 〔專利文獻1〕日本特開2002-370721號 〔專利文獻2〕日本特開2 0 0 1 - 2 0 6 3 3 1號 〔專利文獻3〕日本特開2002-3 32022號 〔專利文獻4〕日本特開200 3- 40230號 【發明內容】 然而’上述習知之具有頸縮部之瓶體，存在著以下的 問題。亦即’具有頸縮部之瓶體的表面係形成和緩的彎 曲’若在這種曲面所形成之瓶體表面形成由多角形所組合 成之嵌板，減壓所造成之容器變形會集中於局部，而可能 導體瓶體之大幅變形。又，具有頸縮部之瓶體是由聚對苯 二甲酸乙二醇酯（PET)等的材料製造的情形，可能起因於 200835627 製造方法而造成頸縮部的材料之壁厚變薄的情形。 此外，在側面是由連續平滑的曲面所形成之具有頸縮 部之瓶體，若採用專利文獻1所揭示之由複數個多角形所 組合成之嵌板，不僅會影響瓶體本身的美觀，且因曲面和 多角形之不整合會帶給使用者不協調感。 再者，專利文獻2揭示的瓶體，僅單純增多瓶體本體 部之面數，因此瓶體內部之具有減壓吸收功能之面的面積 變小，而無法獲得完全的功能。因此，會發生不規則的減 壓變形，又配置於本體部之凹狀或凸狀肋部（基於補強強 度的目的而設置）之寬度變窄，而造成剛性降低。 另外，專利文獻3揭示之瓶體，設於周方向之連續的 環狀槽部（用來補強減壓吸收嵌板周圍的強度），針對本體 部之橫方向的外力、防止減壓吸收嵌板周圍的變形等，雖 有一定效果，但對於瓶體高度方向的荷重之垂直荷重強 度，則產生反效果，常會造成強度降低。 再者，專利文獻4揭示之瓶體，由於是使用單純由山 部和谷部所構成的段差來確保剛性，並不適用於高度較高 的瓶體。 本發明之目的，係提供一種可解決上述問題點之具有 頸縮部之瓶體。爲了達成該目的，本發明採用的構造，係 在瓶體的側面之至少一部分具有由曲面形成的頸縮部之具 有頸縮部之瓶體，至少在前述頸縮部設有至少1片的減壓 吸收用的嵌板，前述嵌板的寬度是從該嵌板的一端迄另一 端連續變化。 -6- 200835627 此外，前述嵌板，在前述頸縮部中之最爲頸縮部分的 寬度比其他部分更寬。 再者，前述嵌板之水平方向截面，係比前述具有頸縮 部之瓶體的側面之其他部分更朝瓶體的內部凹陷。 再者，前述嵌板之水平方向截面係形成曲線。 再者，前述嵌板，係延伸至前述具有頸縮部之瓶體的 上下兩端附近。 又，前述嵌板至少設有2片，該嵌板係沿前述具有頸 縮部之瓶體的周方向隔著等間隔配置。 又前述嵌板的數目有8片。 【實施方式】 其次，參照圖式來說明本發明的一實施形態。 〔全體槪要〕 本發明的一實施形態之具有頸縮部之瓶體1，係在瓶 體側面之至少一部分，亦即在瓶體的上下方向之中間部分 具有由曲面形成的頸縮部1 1之葫蘆形，本實施形態，係 在比上下方向的中心稍靠上方的位置形成頸縮部11。具 有頸縮部之瓶體的側面係由：大致圓形截面之側壁2 1、 以及至少形成於頸縮部之減壓吸收用的嵌板3 i所構成。 在具:有頸縮部之瓶體1的上端，形成用來卡合蓋體（未圖 示）之蓋體卡合部4 1。本實施形態之具有頸縮部之瓶體 1 ’係由透明的聚對苯二甲酸乙二醇酯材料所構成，也就 -7 - 200835627 是所謂PET瓶體。 〔側壁〕 側壁2 1，係從具有頸縮部之瓶體1的上端側延伸到 下端側之壁構件，從水平方向的截面觀察時，如第2圖所 示，除嵌板31部分係具有大致圓形截面。關於各部位之 圓形截面的直徑，頸縮部1 1最小’具有頸縮邰之瓶體1 的下部最大，上部之大小介於中間。由於上下方向之中間 部分成爲頸縮部11，藉由把持該頸縮部11 ’可確實地保 持具有頸縮部之瓶體1。在此所稱之「頸縮部」的情形， 係包含最小直徑的部分，可進一步包含其上下附近區域。 因此，本發明也能適用於，例如僅頸縮部是由曲面形成’ 其他部分則是由平面組合所構成的瓶體。 〔嵌板〕 在具有頸縮部之瓶體1的側面形成複數個嵌板3 1。 該嵌板3 1，在頸縮部1 1中最爲頸縮（直徑最小）的部分之 寬度最大，一端和另一端（瓶體豎立時之上下方向的兩端 部附近）之寬度最窄，而形成舟形的嵌板，且其寬度呈連 續變化。嵌板31之截面形狀，如第2(C)圖及第3圖所 示，係朝內側形成曲面狀凹陷的形狀。嵌板31的深度， 在頸縮部1 1最深（約3mm)，在上下方向之兩端部最淺。 第3圖爲具有頸縮部之瓶體的立體圖，瓶體表面之各線條 是爲了便於理解立體形狀。本實施形態之嵌板3 1，係延 -8- 200835627 伸至具有頸縮部之瓶體1的上下兩端附近。本發明並不限 於此，也能是僅在頸縮部Π形成嵌板3 1，或將嵌板3 1 的長度設定成：超過頸縮部1 1，但未達瓶體的上下兩端 附近。 本實施形態之具有頸縮部之瓶體1，其嵌板31有8 片。如此，可確保瓶體本體的強度，並確實吸收減壓所造 成之瓶體變形。然而，本發明並不限於此，也可以是1片 _ 至7片，或9片以上。當然，必須按照嵌板3 1的片數來 調整各嵌板31的寬度。本實施形態之具有頸縮部之瓶體 1，例如爲500ml用，具體尺寸例如爲：高度約220mm， 頸縮部11之最小直徑部位於從下端量起約125mm的位 置。又嵌板之最大寬度存在於頸縮部1 1之最小直徑部附 近，其寬度約15.8mm。第1圖中，A-A線所示之頸縮部 之最小直徑約 53.5mm，B-B線所示之上部的直徑約 6 3mm，C-C線所示之下部的直徑約68.5mm。 〔蓋體卡合部〕 具有頸縮部之瓶體1的上端成爲蓋體卡合部41。在 該蓋體卡合部41形成有公螺紋部41a，用來與蓋體（圖示 省略）內面所形成之母螺紋部卡合。但該公螺紋部4 1 a對 本發明而言並非必須，例如也能形成單純的圓筒形，如此 將蓋體壓下即可形成密封。 〔瓶體各部之壁厚〕 -9 - 200835627 本發明之具有頸縮部之瓶體1，例如是用吹塑成形法 來成形。該方法，係在可決定瓶體形狀之模具中，保持著 預成形物，並朝內側導入壓縮空氣以將材料緊壓在模具 上。在採用這種手法進行具有頸縮部之瓶體1的成形時， 頸縮部之壁厚可能會變薄。例如，未形成嵌板而具有平滑 側面之具有頸縮部之瓶體的情形，如第4圖所示，頸縮部 以外的壁厚爲〇.35mm〜0.37mm左右，但頸縮部的壁厚減 少成約〇.29mm左右。 另一方面’第5圖係顯示設有嵌板31之具有頸縮部 之瓶體1的各部壁厚之圖表。如該表所示，頸縮部1 1之 最小直徑部的壁厚爲0 · 3 4 m m，比其上下區域的壁厚（〇 · 2 7 〜0.2 9 mm)更厚。其理由在於，在用來形成嵌板31之成型 用模具上形成有凹凸，利用該凹凸可發揮防止壁厚變動之 效果。如此般，藉由形成適當的嵌板，相較於未設有嵌板 之瓶體’可增大頸縮部11之壁厚，且在具有頸縮部之瓶 體1的高度方向產生像柱體般的效果，而能增大頸縮部 1 1之縱向壓縮強度。 〔內容物之充塡方法〕 在該具有頸縮邰之瓶體1中，例如充塡飲料。飮料按 照種類須採用不同的充塡方法，具體而言，一般分成 熱裝塡、2)常溫無菌充塡、3)冷充塡等3種。 熱裝塡法，是用比常溫高很多的溫度（例如85 )充塡 於瓶體之方法。採用該方法的包括運動飲料、果汁等等。 -10- 200835627 常溫無菌充塡，是用2 5 °C左右的溫度將飲料充 之方法。採用該方法的包括氽飮料、水、含牛奶 紅茶等等。冷充塡，是用比常溫低的溫度進行 法，適用於碳酸飮料等的充塡。又本發明是適用 塡方法中之1)熱裝塡、2)常溫無菌充塡。 〔減壓之產生〕 將飲料充塡於瓶體後，基於以下種種的原因 體內成爲減壓狀態。例如，在上述常溫無菌充塡 飲料是以溫度25 °C左右的狀態充塡於瓶體，實 狀態則是冷卻至5 °C左右而陳列於店面。如此般 化會使屬於液體之飲料發生收縮。關於其收縮 5 0 0 m 1瓶體的情形爲3 · 7 m 1左右。如此會使瓶體 減壓狀態。又飲料充塡後，在瓶體最上部會殘留 的氣體。該氣體內含有氧氣，冷卻會造成氧氣 內，因此會發生相當於2ml量之減壓。再者，在 料之PET瓶體等的情形，在庫存期間，水分會 經過而透過瓶體，相對於全容量其透過量爲每月 右。因此，在500ml瓶體的情形，失去的水分爲 左右。例如在保管8個月的情形，最多會有4ml 分透過瓶體。 將以上各個減壓要因累加起來時，換算成體 相當於將近約1 〇 m 1之減壓。因此，爲了使例如 量之瓶體不發生變形，亦即維持最初的形狀，最 塡於瓶體 的咖啡、 充塡的方 於上述充 ，會使瓶 的情形， 際之販售 之溫度變 量，例如 內部成爲 有一定量 溶入飲料 充塡有飮 隨著時間 Ϊ 0 · 1 % 左 0.5ml/月 左右的水 積會發生 500ml 容 少須要求 -11 - 200835627 1 0ml左右的減壓吸收能力。未設置減壓吸收用的嵌板之 具有頸縮部之瓶體，因上述減壓會造成容器之大幅變形。 具體而言，其圓形截面可能變形成接近橢圓之截面形狀。 若產生這樣的變形，在流通過程之製品價値會明顯降低。 〔作用〕 接著，說明本實施形態之具有頸縮部之瓶體1對上述 減壓的作用。本發明藉由設置舟形的嵌板3 1，可獲得良 好的減壓吸收能力。具體而言，嵌板3 1爲了吸收減壓而 朝具有頸縮部之瓶體1的內部側稍微凹陷。藉此，可確實 地吸收飮料之體積減少量，而不致使其他部分發生變形。 特別是，本實施形態之嵌板3 1，係延伸至具有頸縮部之 瓶體之上下兩端附近，而能較自由地進行嵌板3 1朝瓶體 內部方向的移動。因此，具有頸縮部之瓶體1的全體形 狀，不論內部壓力狀態如何都能維持最初充塡時的形狀。 此外，本實施形態之具有頸縮部之瓶體1中，嵌板 3 1之寬度和深度都是呈連續變化，而形成平滑的舟形， 因此減壓發生之應力不會集中於局部。此外，由於嵌板 31延伸至具有頸縮部之瓶體1之上下方向的兩端附近， 該嵌板31可發揮柱體般的功能，即使對於具有頸縮部之 瓶體1的上下方向之壓縮力，也能具有充分的強度。 再者，在具有平滑的頸縮部1 1之具有頸縮部之瓶體 1，對應於頸縮部而使用寬度及深度呈平滑改變之舟形的 嵌板3 1，藉此不僅外觀美觀，且當使用者把持住具有頸 -12- 200835627 縮部之瓶體1時不會感覺不協調。 再者，在本實施形態，主要是說明，在具有頸縮部之 瓶體1的上下方向中間區域設有1個頸縮部1 1之具有頸 縮部之瓶體1，但本發明並不限於此。例如，也能適用於 設有2個頸縮部之具有頸縮部之瓶體。又在本實施形態， 頸縮部1 1是沿著具有頸縮部之瓶體1的圓周方向形成大 致水平，但本發明並不限於此，例如也能相對於長軸方向 形成傾斜，或在瓶體的側面形成螺旋狀。 本發明係適用於用來收容液體等之瓶體容器等的構 造。 【圖式簡單說明】 第1圖係顯示本發明的一實施形態之具有頸縮部之瓶 體之前視圖。 第2圖係第1圖所揭示的瓶體，第2(A)圖顯示俯視 圖，第2(B)圖顯示仰視圖，第2(C)圖顯示第1圖之A-A 線之截面圖。 第3圖係將第1圖揭示的具有頸縮部之瓶體加上陰影 線之立體圖。 第4圖係顯示習知之未設置嵌板之具有頸縮部之瓶體 之各部壁厚的圖表。 第5圖係顯示本發明之具有頸縮部之瓶體之各部壁厚 的圖表。 -13- 200835627 【主要元件符號說明】 I :具有頸縮部之瓶體 II :頸縮部 21 :側壁 3 1 :嵌板 41 :蓋體卡合部 4 1 a :公螺紋部200835627 IX. OBJECT OF THE INVENTION [Technical Field] The present invention relates to a bottle body having a neck portion, and particularly to a panel having a panel for reducing the pressure caused by a decrease in the volume of the liquid to be absorbed. The body of the bottle. [Prior Art] Conventionally, various shapes have been proposed for a bottle body for containing a dip material or the like. For example, a so-called neck portion having a neck portion in which the diameter of the intermediate portion in the vertical direction of the bottle body is reduced is included. The bottle body having the neck portion not only has an aesthetically pleasing appearance, but also can securely hold the bottle body when the user holds the necked portion of the bottle body. In a resin container such as a beverage, a temperature change such as cooling occurs after the material is stored. In this case, the internal liquid is depressurized due to a decrease in the volume of the internal liquid, and the container may be deformed. In order to prevent this, a panel for vacuum absorption can be provided on the surface of the bottle φ body. The panel is generally a wall of a bottle that is recessed from the surface of the bottle toward the interior. There are many types of panels, and a structure in which polygons are combined is generally used. The panel not only can reduce the pressure absorption, but also can reduce the amount of material used, and can improve the strength of the bottle itself, so it is very important for the container. The conventional example discloses a combination of triangular panels (see Patent Document 1). Further, a conventional example in which a panel is provided on the side surface of the bottle body is provided with a rectangular panel extending in the vertical direction on the side surface of the bottle body (see Patent Document 2). In the conventional example, in order to make the printed text on the surface of the label around the bottle -4-200835627 temple easy to observe ' or to avoid changes in the design image of the pattern printed on the surface of the curtain, the body of the bottle body is increased. The number of plates is formed into a polygonal shape. Further, another conventional example in which a panel is provided on the side of the bottle body is provided with a deformed rectangular panel on the side of the bottle body, and a lateral rib is provided in the vicinity of the vertical direction of the bottle body (see Patent Document 3). In the conventional example, the rigidity can be increased by the lateral ribs, and the deformation of the container can be suppressed by the column portion formed between the panels. Furthermore, 'the other known bottle body, in order to keep the appearance of the bottle body smooth, does not have a panel on the surface, and in order to maintain rigidity, there is a step of alternating the mountain and the valley in the circumferential direction ( Japanese Patent Laid-Open Publication No. 2002-370721 [Patent Document 2] Japanese Patent Application Laid-Open No. Hei 2 0 0 1 - 2 0 6 3 3 1 [Patent Document 3] JP-A-2002-332022 [Patent Document 4] Japanese Laid-Open Patent Publication No. Hei. No. Hei. No. Hei. No. Hei. That is, the surface of the bottle body having the neck portion is formed and gently curved. If the surface of the bottle body formed by such a curved surface is formed into a panel composed of polygons, the deformation of the container caused by the decompression will be concentrated on Partial, and possibly large deformation of the conductor body. Further, the bottle body having the neck portion is made of a material such as polyethylene terephthalate (PET), and may cause a thinning of the wall thickness of the material of the neck portion due to the manufacturing method of 200835627. . In addition, the side surface is a bottle body having a neck portion formed by a continuous smooth curved surface. If the panel formed by a plurality of polygons disclosed in Patent Document 1 is used, the appearance of the bottle body itself is not affected. And because of the unconformity of the surface and the polygon will bring the user a sense of discomfort. Further, in the bottle disclosed in Patent Document 2, since only the number of faces of the body portion of the bottle body is increased, the area of the surface having the pressure-reducing absorption function inside the bottle body becomes small, and a complete function cannot be obtained. Therefore, irregular pressure reduction deformation occurs, and the width of the concave or convex rib (provided for the purpose of reinforcing strength) disposed in the main body portion is narrowed, resulting in a decrease in rigidity. Further, the bottle disclosed in Patent Document 3 is provided with a continuous annular groove portion in the circumferential direction (for reinforcing the strength around the pressure reduction absorption panel), and an external force in the lateral direction of the main body portion to prevent the pressure reduction absorption panel. Although the surrounding deformation and the like have a certain effect, the vertical load intensity of the load in the height direction of the bottle body has an adverse effect, and the strength is often lowered. Further, the bottle disclosed in Patent Document 4 is not suitable for a bottle having a high height because it uses a step formed by a mountain portion and a valley portion to ensure rigidity. SUMMARY OF THE INVENTION An object of the present invention is to provide a bottle body having a neck portion which can solve the above problems. In order to achieve the object, the present invention adopts a structure in which at least a part of the side surface of the bottle body has a neck portion having a neck portion formed by a curved surface, and at least one of the neck portions is provided with at least one reduction. A panel for pressure absorption, the width of the panel being continuously changed from one end to the other end of the panel. -6- 200835627 Further, in the aforementioned panel, the width of the most necked portion in the aforementioned neck portion is wider than the other portions. Further, the horizontal cross section of the panel is recessed toward the inside of the bottle body than the other portion of the side surface of the bottle body having the neck portion. Furthermore, the horizontal section of the panel is curved. Further, the panel extends to the vicinity of the upper and lower ends of the bottle body having the neck portion. Further, at least two panels are provided, and the panels are arranged at equal intervals in the circumferential direction of the bottle body having the neck portion. Further, the number of the aforementioned panels is eight. [Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. [Embodiment] A bottle body 1 having a neck portion according to an embodiment of the present invention has at least a part of a side surface of the bottle body, that is, a neck portion 1 formed by a curved surface in a middle portion of the bottle body in the up and down direction. In the gourd shape of the first embodiment, the neck portion 11 is formed at a position slightly above the center in the vertical direction. The side surface of the bottle body having the neck portion is composed of a side wall 2 1 having a substantially circular cross section and a panel 3 i for at least the pressure reducing absorption formed in the neck portion. At the upper end of the bottle body 1 having the neck portion, a lid engaging portion 41 for engaging a lid (not shown) is formed. The bottle body 1' having the necked portion of the present embodiment is made of a transparent polyethylene terephthalate material, and -7 - 200835627 is a so-called PET bottle body. [Side wall] The side wall 21 is a wall member extending from the upper end side to the lower end side of the bottle body 1 having the neck portion. When viewed in a horizontal cross section, as shown in Fig. 2, the panel 31 has a portion. A roughly circular cross section. Regarding the diameter of the circular cross section of each portion, the neck portion 1 is the smallest 'the lower portion of the bottle body 1 having the neck constriction is the largest, and the upper portion is in the middle. Since the intermediate portion in the up and down direction becomes the neck portion 11, the bottle body 1 having the neck portion can be surely held by holding the neck portion 11'. The term "necked portion" as used herein refers to a portion having a minimum diameter, and may further include a region near the upper and lower sides thereof. Therefore, the present invention is also applicable to, for example, only the neck portion is formed by a curved surface, and the other portion is a bottle body composed of a flat combination. [Blank Plate] A plurality of panels 31 are formed on the side surface of the bottle body 1 having the neck portion. The width of the most constricted (the smallest diameter) part of the panel 31 is the largest, and the width of the one end and the other end (near the upper and lower ends of the bottle when the bottle is erected) is the narrowest. The boat-shaped panels are formed and their width changes continuously. The cross-sectional shape of the panel 31 is a shape in which a curved recess is formed toward the inner side as shown in Figs. 2(C) and 3D. The depth of the panel 31 is the deepest (about 3 mm) in the neck portion 1 and the shallowest at both ends in the up and down direction. Fig. 3 is a perspective view of a bottle body having a neck portion, and the lines on the surface of the bottle body are for easy understanding of the three-dimensional shape. The panel 3 1 of the present embodiment extends -8-200835627 to the vicinity of the upper and lower ends of the bottle body 1 having the neck portion. The present invention is not limited thereto, and the panel 3 1 may be formed only in the neck portion, or the length of the panel 3 1 may be set to exceed the neck portion 1 1 but not near the upper and lower ends of the bottle body. . In the bottle body 1 having the neck portion according to the present embodiment, the panel 31 has eight sheets. In this way, the strength of the body of the bottle can be ensured, and the deformation of the bottle body caused by the pressure reduction is surely absorbed. However, the present invention is not limited thereto, and may be one sheet to seven sheets, or nine sheets or more. Of course, the width of each panel 31 must be adjusted in accordance with the number of panels 31. The bottle body 1 having the neck portion in the present embodiment is, for example, 500 ml, and the specific size is, for example, about 220 mm in height, and the smallest diameter portion of the neck portion 11 is located at a position of about 125 mm from the lower end. Further, the maximum width of the panel exists near the smallest diameter portion of the neck portion 1 1 and has a width of about 15.8 mm. In Fig. 1, the neck portion shown by the A-A line has a minimum diameter of about 53.5 mm, the upper portion of the line B-B has a diameter of about 63 mm, and the lower portion of the C-C line has a diameter of about 68.5 mm. [Cover Engagement Portion] The upper end of the bottle body 1 having the necked portion serves as the lid engagement portion 41. The lid engaging portion 41 is formed with a male screw portion 41a for engaging with a female screw portion formed on the inner surface of the lid body (not shown). However, the male thread portion 4 1 a is not essential to the present invention, and for example, a simple cylindrical shape can be formed, so that the lid body can be pressed to form a seal. [Wall thickness of each part of the bottle body] -9 - 200835627 The bottle body 1 having the neck portion of the present invention is formed, for example, by a blow molding method. In this method, a preform is held in a mold which can determine the shape of the bottle, and compressed air is introduced to the inside to press the material against the mold. When the bottle body 1 having the neck portion is formed by such a method, the wall thickness of the neck portion may be thinned. For example, in the case of a bottle having a neck portion having a smooth side without forming a panel, as shown in Fig. 4, the wall thickness other than the neck portion is about 3535 mm to 0.37 mm, but the wall of the neck portion is The thickness is reduced to about 29.29mm. On the other hand, Fig. 5 is a graph showing the wall thickness of each portion of the bottle body 1 having the neck portion of the panel 31. As shown in the table, the wall thickness of the smallest diameter portion of the neck portion 1 is 0 · 3 4 m m, which is thicker than the wall thickness of the upper and lower portions (〇 · 2 7 to 0.2 9 mm). The reason for this is that irregularities are formed in the molding die for forming the panel 31, and the unevenness can be exerted by the unevenness. Thus, by forming a suitable panel, the wall thickness of the neck portion 11 can be increased as compared with the bottle body not provided with the panel, and the image column is generated in the height direction of the bottle body 1 having the neck portion. The body-like effect can increase the longitudinal compressive strength of the neck portion 11. [Method of Filling the Contents] In the bottle body 1 having the neck constriction, for example, a beverage is filled. Different types of filling methods are required according to the type of the materials. Specifically, they are generally classified into three types: hot pack, 2) normal temperature aseptic filling, and 3) cold filling. The hot mounting method is a method of filling the bottle with a temperature much higher than normal temperature (for example, 85). This method includes sports drinks, juices, and the like. -10- 200835627 Sterile filling at room temperature is a method of filling the beverage at a temperature of about 25 °C. This method includes dips, water, milk-containing black tea, and the like. Cold charging is carried out at a temperature lower than normal temperature and is suitable for charging of carbonated materials. Further, the present invention is applicable to 1) hot charging, 2) normal temperature aseptic filling. [Production of Decompression] After the beverage is filled in the bottle, the body is decompressed for the following reasons. For example, in the above-mentioned normal temperature aseptic filling beverage, the bottle body is filled at a temperature of about 25 ° C, and in the actual state, it is cooled to about 5 ° C and displayed on the storefront. Such a change will cause the beverage belonging to the liquid to shrink. Regarding the contraction of the 500 m 1 bottle, the case is about 3 · 7 m 1 . This will depressurize the bottle. After the beverage is filled, the gas remains in the uppermost part of the bottle. The gas contains oxygen, and cooling causes oxygen to be present, so a pressure reduction equivalent to 2 ml is generated. Further, in the case of a PET bottle or the like in the case of the material, the moisture passes through the bottle during the stocking period, and the permeation amount is monthly to the right with respect to the full capacity. Therefore, in the case of a 500 ml bottle, the lost moisture is around. For example, in the case of storage for 8 months, a maximum of 4 ml is passed through the bottle. When the above various decompression factors are added up, the conversion into a volume is equivalent to a decompression of approximately 1 〇 m 1 . Therefore, in order to prevent, for example, the amount of the bottle from being deformed, that is, to maintain the original shape, the coffee that is most confined to the bottle, the filling of the bottle, the temperature of the bottle, and the temperature variation of the bottle, For example, the inside becomes a certain amount of dissolved beverages. The time is Ϊ 0 · 1 %. The left side of 0.5ml/month of water will produce 500ml. The need for -11 - 200835627 1 0ml is reduced. The bottle having the neck portion of the panel for pressure-reducing absorption is not provided, and the above-described pressure reduction causes a large deformation of the container. Specifically, its circular cross section may be deformed into a cross-sectional shape close to an ellipse. If such a deformation occurs, the price of the product during the circulation process will be significantly reduced. [Operation] Next, the action of the bottle body 1 having the neck portion in the present embodiment on the above-described pressure reduction will be described. The present invention can achieve good decompression absorption capacity by providing a boat-shaped panel 31. Specifically, the panel 31 is slightly recessed toward the inner side of the bottle body 1 having the necked portion in order to absorb the pressure. Thereby, the volume reduction of the dip material can be surely absorbed without causing deformation of other portions. In particular, the panel 31 of the present embodiment extends to the vicinity of the upper and lower ends of the bottle body having the neck portion, and the panel 3 1 can be freely moved in the direction of the inside of the bottle. Therefore, the overall shape of the bottle body 1 having the necked portion maintains the shape at the time of initial filling regardless of the internal pressure state. Further, in the bottle body 1 having the necked portion of the present embodiment, the width and the depth of the panel 31 are continuously changed to form a smooth boat shape, so that the stress generated by the pressure reduction is not concentrated locally. Further, since the panel 31 extends to the vicinity of both ends in the upper and lower directions of the bottle body 1 having the neck portion, the panel 31 can function as a cylinder, even in the up and down direction of the bottle body 1 having the neck portion. The compressive force can also have sufficient strength. Further, in the bottle body 1 having the neck portion having the smooth neck portion 1 1 , a boat-shaped panel 3 1 having a smooth change in width and depth is used corresponding to the neck portion, thereby not only being aesthetically pleasing, but also When the user holds the bottle 1 having the neck 12-200835627, it does not feel uncoordinated. Further, in the present embodiment, the bottle body 1 having the neck portion 1 of the neck portion 1 is provided in the intermediate portion in the vertical direction of the bottle body 1 having the neck portion, but the present invention is not Limited to this. For example, it can also be applied to a bottle body having a neck portion provided with two neck portions. Further, in the present embodiment, the neck portion 11 is formed substantially horizontally along the circumferential direction of the bottle body 1 having the neck portion. However, the present invention is not limited thereto, and for example, it may be inclined with respect to the long axis direction, or The sides of the bottle form a spiral. The present invention is applicable to a structure for a bottle container or the like for accommodating a liquid or the like. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a front view showing a bottle body having a neck portion according to an embodiment of the present invention. Fig. 2 is a view of the bottle disclosed in Fig. 1, Fig. 2(A) shows a plan view, Fig. 2(B) shows a bottom view, and Fig. 2(C) shows a cross-sectional view taken along line A-A of Fig. 1. Fig. 3 is a perspective view showing the hatching of the bottle body having the neck portion disclosed in Fig. 1. Fig. 4 is a graph showing the wall thicknesses of the respective portions of the bottle body having the neck portion which is not provided with the panel. Fig. 5 is a graph showing the wall thicknesses of the respective portions of the bottle body having the neck portion of the present invention. -13- 200835627 [Explanation of main component symbols] I: Bottle body with necked portion II: Necked portion 21: Side wall 3 1 : Panel 41: Cover engaging portion 4 1 a : Male thread portion
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