JP4689350B2 - Polyethylene terephthalate resin housing - Google Patents

Polyethylene terephthalate resin housing Download PDF

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JP4689350B2
JP4689350B2 JP2005154975A JP2005154975A JP4689350B2 JP 4689350 B2 JP4689350 B2 JP 4689350B2 JP 2005154975 A JP2005154975 A JP 2005154975A JP 2005154975 A JP2005154975 A JP 2005154975A JP 4689350 B2 JP4689350 B2 JP 4689350B2
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polyethylene terephthalate
terephthalate resin
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outer peripheral
panel wall
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JP2006327638A (en
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博行 水谷
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Ishizuka Glass Co Ltd
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Ishizuka Glass Co Ltd
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Description

本発明は、壜体にかかる増圧・減圧に対し変形して外観不良を起こすことのないポリエチレンテレフタレート樹脂製壜体に関するものである。   The present invention relates to a casing made of polyethylene terephthalate resin that does not deform due to pressure increase / decrease applied to the casing and does not cause poor appearance.

従来から、ポリエチレンテレフタレート樹脂（ＰＥＴ）を２軸延伸ブローして成形したポリエチレンテレフタレート樹脂製壜体は、ブロー成形後にヒートセットすることにより耐熱性を向上させて、高温充填が必要な内容液を充填収納可能な耐熱壜体とすることができることが知られている。
しかしながら、ポリエチレンテレフタレート樹脂製壜体はガラス製壜体とは異なり柔軟性があるため、高温加圧充填すると壜体内の圧力変化により変形して外形寸法不良を起こす場合があり、これが原因で充填ラインや自動販売機ラインで搬送トラブル等を発生させるという問題点があった。 Conventionally, polyethylene terephthalate resin (PET) molded by biaxial stretching blow molding is made of polyethylene terephthalate resin, heat-set after blow molding, and filled with content liquid that requires high-temperature filling. It is known that the heat-resistant housing can be stored.
However, since the polyethylene terephthalate resin housing is flexible unlike the glass housing, high temperature and pressure filling may cause deformation due to changes in the pressure inside the housing, resulting in defective external dimensions. In addition, there was a problem that a conveyance trouble occurred in the vending machine line.

そこで、特許文献１に示されるように、壜体の壁面に縦長に深く陥没して並設される減圧吸収用のパネル壁を形成することで、壜体内の圧力変化による壜形状の変形を防止することが図られており、更には、パネル壁構造として内壁部に外向きの凸形状を設けることで、充填した内容液の温度低下による壜体の減圧変形を防止することが図られていた。   Therefore, as shown in Patent Document 1, by forming a panel wall for absorbing vacuum that is deeply depressed in parallel with the wall surface of the casing, deformation of the bowl shape due to pressure change in the casing is prevented. Furthermore, by providing an outwardly convex shape on the inner wall portion as a panel wall structure, it was intended to prevent decompression deformation of the casing due to a temperature drop of the filled content liquid .

しかしながら、例えば充填ラインのトラブル等により加圧状態が長く続いた場合には、前記凸形状が余計に外側へ押し出されてしまい、その後、内容液が温度低下した時に本来均一に減圧吸収すべきパネル壁が不正な変形を起こし外観不良を起こす場合があるという問題点があった。
特開平７−１０２８５６号公報 However, when the pressurized state continues for a long time due to, for example, a trouble in the filling line, etc., the convex shape is pushed out to the outside, and then the panel that should be absorbed uniformly under reduced pressure when the temperature of the content liquid drops after that. There has been a problem that the wall may be deformed improperly, resulting in poor appearance.
JP-A-7-102856

本発明は上記のような問題点を解決して、充填ラインのトラブル等により壜体に予想外の増圧・減圧がかかった場合にも、不正な変形を発生して外観不良を起こすことがなく適正な形状を保持することができるポリエチレンテレフタレート樹脂製壜体を提供することを目的として完成されたものである。   The present invention solves the above-mentioned problems, and even when unexpected pressure increase / decrease is applied to the housing due to troubles in the filling line, etc., it may cause incorrect deformation and cause poor appearance. The present invention has been completed for the purpose of providing a polyethylene terephthalate resin casing capable of maintaining an appropriate shape.

上記課題を解決するためになされた本発明のポリエチレンテレフタレート樹脂製壜体は、２軸延伸ブローして成形されるポリエチレンテレフタレート樹脂製壜体の胴部に、縦長に陥没して並設される圧力変化吸収用の長円状パネル壁を形成し、更に、該パネル壁全体を外側に向け膨出する圧力変化吸収用の膨出部としたポリエチレンテレフタレート樹脂製壜体であって、前記膨出部の中央部に内側に向け凹んだ縦長凹部を形成し、この凹部外周線の投影面積を膨出部外周線の投影面積の５２〜７２％の範囲とし、また、凹部外周線の幅を膨出部外周線の幅に対して５７〜７１％の範囲とし、更に、凹部の深さを凹部外周線の幅に対して５．６〜９．９％の範囲としたことを特徴とするものである。 The polyethylene terephthalate resin casing of the present invention, which has been made to solve the above-mentioned problems, is a pressure that is vertically juxtaposed in a body portion of a polyethylene terephthalate resin casing formed by biaxial stretching blow. A casing made of polyethylene terephthalate resin, which forms an elliptical panel wall for absorbing change, and further forms a bulging portion for absorbing pressure change that bulges the entire panel wall outward, wherein the bulging portion A longitudinally recessed portion that is recessed inwardly at the center is formed, the projected area of the recessed portion outer circumferential line is set to be 52 to 72% of the projected area of the bulged portion outer circumferential line, and the width of the recessed portion outer circumferential line is expanded. The range is 57 to 71% with respect to the width of the outer periphery of the protruding portion, and the depth of the recess is in the range of 5.6 to 9.9% with respect to the width of the outer periphery of the recess. It is.

本発明では、ポリエチレンテレフタレート樹脂製壜体の胴部に、縦長に陥没して並設される圧力変化吸収用の長円状パネル壁を形成し、更に、該パネル壁全体を外側に向け膨出する圧力変化吸収用の膨出部としたポリエチレンテレフタレート樹脂製壜体であって、前記膨出部の中央部に内側に向け凹んだ縦長凹部を形成し、この凹部外周線の投影面積を膨出部外周線の投影面積の５２〜７２％の範囲とすることにより、パネル壁が高温・高圧充填の際にかかる増圧や、内溶液温度低下による減圧に柔軟に対応して不正な変形の発生を防止し、外観に優れて適正な形状が保持可能となる。   In the present invention, an oval panel wall for absorbing pressure change is formed in the body portion of the polyethylene terephthalate resin casing so as to be vertically depressed and arranged side by side. Further, the entire panel wall bulges outward. This is a polyethylene terephthalate resin casing that is used as a bulging part for absorbing pressure change, and has a longitudinally recessed part recessed inward at the center part of the bulging part, and the projected area of the outer peripheral line of the recessed part is bulged. By setting the range of the projected area of the outer peripheral line to 52 to 72%, the panel wall can be deformed flexibly in response to pressure increase when the panel wall is filled with high temperature and high pressure, and pressure reduction due to lowering of the internal solution temperature. And an appropriate appearance can be maintained.

以下に、図面を参照しつつ本発明の好ましい形態を示す。
図面は、２軸延伸ブローして成形されるポリエチレンテレフタレート樹脂製壜の一例を示し、内容量は５００ｃｃ、内容物はお茶等の高温充填されるものである。また、図１は壜体の正面図、図２はパネル壁の正面図、図３は図１におけるＡ−Ａ断面図、図４は図１におけるＢ−Ｂ断面図である。 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
The drawing shows an example of a polyethylene terephthalate resin mold formed by biaxial stretching blow, the content is 500 cc, and the contents are filled with tea or the like at a high temperature. 1 is a front view of the housing, FIG. 2 is a front view of the panel wall, FIG. 3 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 4 is a cross-sectional view taken along line BB in FIG.

図において、１は壜体、２は壜体１の胴部に縦長に陥没して並設される圧力変化吸収用の長円状パネル壁２、３は該パネル壁全体を外側に向け膨出・成形される圧力変化吸収用の膨出部であり、以上の構成は従来のこの種のポリエチレンテレフタレート樹脂製壜と基本的に同じである。なお、５は壜体１とパネル壁２との段部である。   In the figure, 1 is a casing, 2 is an elliptical panel wall 2 and 3 for absorbing pressure change, which is vertically arranged in the body of the casing 1 and bulges with the entire panel wall outward. A bulging portion for absorbing pressure change to be molded, and the above configuration is basically the same as that of a conventional polyethylene terephthalate resin mold. Reference numeral 5 denotes a step portion between the housing 1 and the panel wall 2.

本発明では、前記膨出部３の中央部に内側に向け凹んだ縦長凹部４を形成し、この凹部外周線Ｌ４の投影面積を膨出部外周線Ｌ３の投影面積の５２〜７２％の範囲とした点に特徴的構成を有する。
即ち、本発明者が研究した結果、例えば充填ラインのトラブル等により加圧状態が長く続いた場合には、前記膨出部３が余計に外側へ押し出されてしまい、その後、内容液が温度低下した時に本来均一に減圧吸収すべきパネル壁が不正な変形を起こし外観不良を起こすことがあるという課題を認識し、膨出部３の中央部に内側に向け凹んだ縦長凹部４を形成することで、パネル壁にかかる応力集中を減少させ増圧・減圧時のパネル壁の動きをスムーズにして、前記課題を解決できることを見出したのである。 In the present invention, a vertically long concave portion 4 that is recessed inward is formed in the central portion of the bulging portion 3, and the projection area of the concave portion outer circumferential line L4 is in the range of 52 to 72% of the projected area of the bulging portion outer circumferential line L3. This has a characteristic configuration.
That is, as a result of research conducted by the present inventor, for example, when the pressurized state continues for a long time due to a trouble in the filling line or the like, the bulging portion 3 is excessively pushed out, and then the temperature of the content liquid decreases. Recognizing the problem that the panel wall, which should be absorbed uniformly under reduced pressure, may be deformed improperly and cause poor appearance, and form a vertically elongated recess 4 recessed inward at the center of the bulge 3 Thus, the present inventors have found that the above problem can be solved by reducing the stress concentration on the panel wall and smoothing the movement of the panel wall during pressure increase / decrease.

更に、図２に示されるように、この凹部４は単純に凹ませるだけでなく、凹部外周線(L4)の投影面積を膨出部外周線(L3)の投影面積の５２〜７２％の範囲となるように構成されている。
これは、５２％未満では内容物の充填時において凹部４が外向きに押し出されて不正な変形を起こすおそれがあり、一方、７２％よりも大きいと内容液が温度低下した時の減圧時に不正な変形を起こし外観不良を起こすことがあるので、凹部外周線(L4)の投影面積は膨出部外周線(L3)の投影面積の５２〜７２％の範囲とするのが好ましい。 Further, as shown in FIG. 2, the recess 4 is not simply recessed, but the projection area of the recess outer peripheral line (L4) is in the range of 52 to 72% of the projection area of the bulge outer peripheral line (L3). It is comprised so that.
This is because if the content is less than 52%, the recess 4 may be pushed outward when the contents are filled, causing unauthorized deformation. On the other hand, if the content is greater than 72%, the contents liquid is incorrect when the temperature is reduced. Therefore, it is preferable that the projected area of the recess outer peripheral line (L4) is in the range of 52 to 72% of the projected area of the bulged outer peripheral line (L3).

また、図３に示されるように、凹部外周線(L4)の幅(s4)は、膨出部外周線(L3)の幅(s3)に対して５７〜７１％の範囲とするのが好ましい。
これは、５７％未満では内容物の充填時において凹部４が外向きに押し出されて不正な変形を起こすおそれがあり、一方、７２％よりも大きいと減圧時に不正な変形を起こし外観不良を起こすことがあるためである。 Further, as shown in FIG. 3, the width (s4) of the recess outer peripheral line (L4) is preferably in the range of 57 to 71% with respect to the width (s3) of the bulged part outer peripheral line (L3). .
If the content is less than 57%, the concave portion 4 may be pushed outward when the contents are filled, which may cause an unauthorized deformation. On the other hand, if the content is greater than 72%, an unauthorized deformation may occur at the time of decompression, resulting in poor appearance. Because there are things.

また凹部の深さ(s5)は、凹部外周線(L4)の幅(s4)に対して５．６〜９．９％の範囲とするのが好ましい。
これは、５．６％未満では内容物の充填時において凹部４が外向きに押し出されて不正な変形を起こすおそれがあり、一方、９．９％よりも大きいと内容液が温度低下した時の減圧時に不正な変形を起こし外観不良を起こすことがあるので、凹部の深さ(s5)は凹部外周線(L4)の幅(s4)に対して５．６〜９．９％の範囲とするのが好ましい。 The depth (s5) of the recess is preferably in the range of 5.6 to 9.9% with respect to the width (s4) of the recess outer peripheral line (L4).
If the content is less than 5.6%, the concave portion 4 may be pushed outward when the content is filled, causing unauthorized deformation. On the other hand, if the content is greater than 9.9%, the temperature of the content liquid decreases. The depression depth (s5) may be in the range of 5.6 to 9.9% with respect to the width (s4) of the outer circumferential line (L4). It is preferable to do this.

更に、図４に示されるように、凹部外周線(L4)の高さ(s2)を膨出部外周線(L3)の高さ(s1)の７８％以上、１００％未満とするのが好ましい。
これは、７８％未満では内容物の充填時において凹部４が外向きに押し出されて不正な変形を起こすおそれがので、凹部外周線(L4)の高さ(s2)を膨出部外周線(L3)の高さ(s1)の７８％以上、１００％未満とするのが好ましい。 Further, as shown in FIG. 4, it is preferable that the height (s2) of the recess outer peripheral line (L4) is 78% or more and less than 100% of the height (s1) of the bulge outer peripheral line (L3). .
If the content is less than 78%, the concave portion 4 may be pushed outward when the contents are filled to cause unauthorized deformation. Therefore, the height (s2) of the concave portion outer circumferential line (L4) is set to the bulging portion outer circumferential line ( The height (s1) of L3) is preferably 78% or more and less than 100%.

また、図４に示されるように、凹部４の縦方向の上下両端部は内側に向けた凸弧状線(L5、L5)で構成されており、増圧・減圧時におけるパネル壁の縦方向の動きをスムーズにすることで不正な変形の発生を防止するようになっている。
更に、凹部４の縦方向の深さ(s7)は、凹部外周線(L4)の高さ(s2)の１．４〜２．６％の範囲とすることにより、不正な変形の発生を防止するのが好ましい。 Also, as shown in FIG. 4, the upper and lower ends in the vertical direction of the recess 4 are formed by inwardly protruding arcuate lines (L5, L5), and the vertical direction of the panel wall during pressure increase / decrease is shown. Smooth movement makes it possible to prevent unauthorized deformation.
Furthermore, the depth (s7) in the vertical direction of the concave portion 4 is set to a range of 1.4 to 2.6% of the height (s2) of the concave portion outer peripheral line (L4), thereby preventing unauthorized deformation. It is preferable to do this.

以上の説明からも明らかなように、本発明は２軸延伸ブローして成形されるポリエチレンテレフタレート樹脂製壜体の胴部に、縦長に陥没して並設される圧力変化吸収用の長円状パネル壁を形成し、更に、該パネル壁全体を外側に向け膨出する圧力変化吸収用の膨出部としたポリエチレンテレフタレート樹脂製壜体であって、前記膨出部の中央部に内側に向け凹んだ縦長凹部を形成し、この凹部外周線の投影面積を膨出部外周線の投影面積の５２〜７２％の範囲とし、また、凹部外周線の幅を膨出部外周線の幅に対して５７〜７１％の範囲とし、更に、凹部の深さを凹部外周線の幅に対して５．６〜９．９％の範囲としたことを特徴とするポリエチレンテレフタレート樹脂製壜体であり、パネル壁が高温・高圧充填の際にかかる増圧や、内溶液温度低下による減圧に柔軟に対応して不正な変形の発生を防止し、特に、充填ラインのトラブル等により壜体に予想外の増圧・減圧がかかった場合にも、不正な変形を発生して外観不良を起こすことがなく適正な形状を保持することができることとなる。 As is clear from the above description, the present invention is an ellipse for absorbing pressure change, which is recessed vertically and is juxtaposed in the body of a polyethylene terephthalate resin casing formed by biaxial stretching blow. A polyethylene terephthalate resin casing that forms a panel wall and further bulges to absorb pressure change that bulges the entire panel wall outward, and faces inward to the center of the bulge. A recessed vertically elongated recess is formed, the projection area of the recess outer peripheral line is in the range of 52 to 72% of the projection area of the bulge outer peripheral line, and the width of the recess outer peripheral line is set to the width of the bulge outer peripheral line. In contrast , a polyethylene terephthalate resin casing having a range of 57 to 71% and a depth of the recesses in the range of 5.6 to 9.9% with respect to the width of the outer periphery of the recesses . , Pressure increase when the panel wall is filled with high temperature and high pressure, It responds flexibly to pressure reduction due to temperature drop to prevent unauthorized deformation. In particular, even when unexpected pressure increase / decrease is applied to the housing due to problems with the filling line, unauthorized deformation occurs. Therefore, it is possible to maintain an appropriate shape without causing appearance defects.

本発明の実施の形態を示す正面図である。It is a front view which shows embodiment of this invention. パネル壁の正面図である。It is a front view of a panel wall. 図１におけるＡ−Ａ断面図である。It is AA sectional drawing in FIG. 図１におけるＢ−Ｂ断面図である。It is BB sectional drawing in FIG.

符号の説明Explanation of symbols

１ 壜体
２ パネル壁
３ 膨出部
４ 凹部
５ 段部
L3 膨出部外周線
L4 凹部外周線
L5 凸弧状線
s1 膨出部外周線(L3)の高さ
s2 凹部外周線(L4)の高さ
s3 膨出部外周線(L3)の幅
s4 凹部外周線(L4)の幅
s5 凹部の深さ
s6 段差
s7 縦方向の深さ DESCRIPTION OF SYMBOLS 1 Housing 2 Panel wall 3 The bulging part 4 Recessed part 5 Step part
L3 bulge circumference
L4 recessed outer circumference
L5 Convex arc line
s1 Height of bulge outer circumference (L3)
s2 Depth outer circumference line (L4) height
s3 Width of bulge outer circumference (L3)
s4 Width of recess outer peripheral line (L4)
s5 Depth of recess
s6 Step
s7 Longitudinal depth

Claims (3)

２軸延伸ブローして成形されるポリエチレンテレフタレート樹脂製壜体の胴部に、縦長に陥没して並設される圧力変化吸収用の長円状パネル壁を形成し、更に、該パネル壁全体を外側に向け膨出する圧力変化吸収用の膨出部としたポリエチレンテレフタレート樹脂製壜体であって、前記膨出部の中央部に内側に向け凹んだ縦長凹部を形成し、この凹部外周線の投影面積を膨出部外周線の投影面積の５２〜７２％の範囲とし、また、凹部外周線の幅を膨出部外周線の幅に対して５７〜７１％の範囲とし、更に、凹部の深さを凹部外周線の幅に対して５．６〜９．９％の範囲としたことを特徴とするポリエチレンテレフタレート樹脂製壜体。 An oblong panel wall for absorbing pressure change is formed in a body portion of a polyethylene terephthalate resin casing formed by biaxial stretching blow, and is recessed in a vertically long shape, and further, the entire panel wall is A casing made of polyethylene terephthalate resin, which is a bulging portion for absorbing pressure change that bulges outward, and has a longitudinally recessed portion recessed inward at the center of the bulging portion, The projected area is in the range of 52 to 72% of the projected area of the bulging portion outer circumferential line, the width of the concave portion outer circumferential line is in the range of 57 to 71% with respect to the width of the bulging portion outer circumferential line, and the concave portion The polyethylene terephthalate resin casing is characterized in that the depth of 5.6 to 9.9% with respect to the width of the outer circumference of the recess . 凹部外周線の高さを膨出部外周線の高さの７８％以上、１００％未満とした請求項１に記載のポリエチレンテレフタレート樹脂製壜体。 2. The polyethylene terephthalate resin casing according to claim 1, wherein the height of the recess outer peripheral line is 78% or more and less than 100% of the height of the bulge outer peripheral line . 凹部の縦方向の深さを、凹部外周線の高さの１．４〜２．６％とした請求項２に記載のポリエチレンテレフタレート樹脂製壜体。 The polyethylene terephthalate resin casing according to claim 2, wherein the depth of the concave portion in the vertical direction is 1.4 to 2.6% of the height of the outer peripheral line of the concave portion .
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JPH06336239A (en) * 1993-03-31 1994-12-06 Yoshino Kogyosho Co Ltd Plastic bottle
JP2001206331A (en) * 2000-01-25 2001-07-31 Yoshino Kogyosho Co Ltd Plastic bottle
JP2002067129A (en) * 2000-08-25 2002-03-05 Toyo Seikan Kaisha Ltd Biaxially stretched polyester bottle and its manufacturing method
JP2005096850A (en) * 2003-08-29 2005-04-14 Yoshino Kogyosho Co Ltd Synthetic resin made bottle type container
JP2005280778A (en) * 2004-03-30 2005-10-13 Yoshino Kogyosho Co Ltd Bottle body made of synthetic resin

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Publication number Priority date Publication date Assignee Title
JPH06336239A (en) * 1993-03-31 1994-12-06 Yoshino Kogyosho Co Ltd Plastic bottle
JP2001206331A (en) * 2000-01-25 2001-07-31 Yoshino Kogyosho Co Ltd Plastic bottle
JP2002067129A (en) * 2000-08-25 2002-03-05 Toyo Seikan Kaisha Ltd Biaxially stretched polyester bottle and its manufacturing method
JP2005096850A (en) * 2003-08-29 2005-04-14 Yoshino Kogyosho Co Ltd Synthetic resin made bottle type container
JP2005280778A (en) * 2004-03-30 2005-10-13 Yoshino Kogyosho Co Ltd Bottle body made of synthetic resin

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