JP4365050B2 - Insulated container and manufacturing method thereof - Google Patents

Insulated container and manufacturing method thereof Download PDF

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Publication number
JP4365050B2
JP4365050B2 JP2001127397A JP2001127397A JP4365050B2 JP 4365050 B2 JP4365050 B2 JP 4365050B2 JP 2001127397 A JP2001127397 A JP 2001127397A JP 2001127397 A JP2001127397 A JP 2001127397A JP 4365050 B2 JP4365050 B2 JP 4365050B2
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Prior art keywords
concave groove
groove
container
heat insulating
fitting
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JP2001127397A
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JP2002321777A (en
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光彦 阿南
貞夫 根岸
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Sekisui Kasei Co Ltd
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Sekisui Kasei Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B29C65/12—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined and welding bar
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/65—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles with a relative motion between the article and the welding tool
    • B29C66/652—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles with a relative motion between the article and the welding tool moving the welding tool around the fixed article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Packages (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、断熱コンテナに関し、特に、食品運搬用容器、生食品保冷用容器、あるいは、保温用容器などとして有効に用いることのできる断熱コンテナに関する。
【０００２】
【従来の技術】
生鮮食品などの通函として、あるいは各種商品の運搬用コンテナとして、図４、図５に示すように、非発泡合成樹脂よりなる内装体１０および外装体２０の両者間に発泡樹脂からなる断熱層３０を介装した形態の断熱コンテナ１が知られている。内装体１０の第１の凸条と外装体２０の第２の凸条とは、コンテナ表面側で互いに突き合わされていて、該突き合わせ部分には底部に向けて次第に幅が狭くなる断面形状を持つ凹状溝４０が形成されており、該凹状溝４０に沿って溶接棒である熱可塑性樹脂５０を走らせ、それを熱風により溶融して凹状溝４０内に充填することにより、前記突き合わせ部分を閉塞一体化している。
【０００３】
さらに、内装体１０と外装体２０との組み付けを安定させるために、また、突き合わせ部の溶着時に発生する熱により内装した発泡樹脂からなる断熱層３０が損傷を受けないようにするために、内装体１０および外装体２０のいずれか一方に凹入形成した嵌合溝５１に、他方に突出形成した嵌合突部５２を嵌入してなる嵌合係止部を備えるようにしている。なお、図において、９０はコンテナ容器の蓋である（実公昭５９−１１０９９号公報、特開２０００−２２９６７５号公報など参照）。
【０００４】
このような形態の断熱コンテナは、発泡樹脂からなる断熱層３０を非発泡合成樹脂である内装体１０および外装体２０で覆うようにしているので、高い断熱性とともにコンテナとしての強度も安定しており、長期にわたる繰り返し使用が可能となる。また、内装体１０と外装体２０との接合端部は熱可塑性樹脂５０による溶接が施されるので、高い密封性が得られ、水洗および熱湯消毒などを煩雑に行っても水分が内部に侵入することもなく、優れた防水性を発揮する。
【０００５】
【発明が解決しようとする課題】
上記構成のコンテナ１において、内装体１０と外装体２０との突き合わせ部分のシール強度を確保するために、凹状溝４０内の所定の深さにまで溶融した熱可塑性樹脂を充満させることが望まれる。熱風により次第に溶融していく熱可塑性樹脂を凹状溝４０内の全体にしかも外にはみ出ないように充填させていくことは容易でなく、シールに必要とされる溶融樹脂の深さと実際の凹状溝の深さとが同じ場合には、溶融樹脂が凹状溝４０から外にはみ出して、バリを発生させる。そのために、従来のものでは、図５に示されるように、凹状溝４０の深さをシール強度確保に必要とされる深さより深いものとし、すなわち、内装体１０の第１の凸条および外装体２０の第２の凸条の高さを本来必要とされるものよりも高いものとし、それにより溶融樹脂５０の上方に凹状溝４０の壁面４１が残るようにして、バリが発生するのを防止していた。そのために、コンテナ１の４周表面に比較的大きな凸条が結果として形成されることとなり、コンテナ１の外専有面積を大きくしていた。
【０００６】
本発明は、上記の事情に鑑みてなされたものであり、内装体１０と外装体２０との突き合わせ部分のシール強度を低下させることなく、該突き合わせ部分の高さを従来のものよりも低くすることができ、かつ、突き合わせ部分に溶融樹脂のバリが発生するのも防止することのできる改良された断熱コンテナ、およびその製造方法を提供することを目的とする。
【０００７】
【課題を解決するための手段】
上記課題を解決するための本発明による断熱コンテナは、非発泡合成樹脂よりなる内装体および外装体の両者間に発泡樹脂からなる断熱層を介装した形態の断熱コンテナであり、内装体と外装体の端部同士はコンテナ表面側で互いに突き合わされていて、該突き合わせ部分には底部に向けて次第に幅が狭くなる断面形状を持つ凹状溝が形成されており、該状凹溝に沿って熱可塑性樹脂による溶接をなして前記突き合わせ部分を閉塞一体化してなる断熱コンテナにおいて、前記凹状溝の底部には凹状溝に連通した溶融熱可塑性樹脂のための溜まり溝が形成されていることを特徴とする。
【０００８】
本発明による断熱コンテナでは、凹状溝の底部に溶融熱可塑性樹脂のための溜まり溝が形成される。そのために、そのような溜まり溝のない従来の断熱コンテナと比較して、溶融樹脂の収容空間は該溜まり溝の分だけ広くなり、かつ、内装体および外装体の突き合わせ部分と溶融樹脂との接触面積も溜まり溝の分だけ広くなる。そのために、内装体の端部および外装体の端部で形成される凹状溝そのものの深さを従来のものよりも低く設定しても、所要の溶融樹脂深さが得られ、所要のシール強度が得られる。また、バリの発生も抑制できる。結果として、突き合わせ部分の高さを従来のものよりも低くすることができ、断熱コンテナの専有面積を縮小することができる。
【０００９】
本発明は、また、上記断熱コンテナの製造方法として、内装体、発泡樹脂からなる断熱層および外装体を一体に組み付けた後、内装体と外装体との突き合わせ部分に形成される凹状溝に沿って溶接棒である熱可塑性樹脂を溶融しながら移動させ、かつ、溶接棒の移動と並行して溶融した熱可塑性樹脂を凹状溝の開放側から前記溜まり溝に向けて押し付けていくことを特徴とするコンテナ容器の製造方法をも開示する。この方法によれば、溶融した熱可塑性樹脂は積極的に凹状溝の開放側から溜まり溝に向けて押し付けられ充満するので、溶接が確実かつ迅速化するとともに、バリが生じるのも確実に抑制できる。
【００１０】
【発明の実施の形態】
以下、本発明を実施の形態に基づき説明する。なお、本発明による断熱コンテナ１Ａにおいて、内装体１０の第１の凸条と外装体２０の第２の凸条との突き合わせ部の構成を除き、他の構成は、図４および図５に示したもの同じであってよい。従って、以下では、突き合わせ部分のみを詳細に説明し、他の部分の説明は省略する。
【００１１】
図１は本発明による断熱コンテナ１Ａの要部を示す断面図であり、非発泡合成樹脂よりなる内装体１０と外装体２０との間に発泡樹脂からなる断熱層３０を収容している。樹脂材料としては、ポリスチレン系樹脂、ポリエチレン、ポリプロピレンなどのポリオレフィン系樹脂、ポリエステル系樹脂のようなものが挙げられるが、強度やコストの面から、ポリスチレン系樹脂、ポリプロピレン系樹脂が好ましい。また、この例において、内装体１０の端部には凹入した形状の嵌合溝５１が形成され、外装体２０の端部には前記嵌合溝５１に嵌入する嵌合突部５２が形成されていて、嵌合溝５１と嵌合突部５２とが嵌合係止部することにより、内装体１０と外装体２０との組み付けを安定させている。
【００１２】
内装体１０の端部の表面側下端には、外側に膨出する第１の凸条１１が形成され、外装体２０の端部の表面側上端には、第１の凸条１１に対向する位置に第２の凸条２１が形成されている。そして、第１の凸条１１と第２の凸条２１の互いに対向する傾斜壁面１２、２２により、両者の間にはＶ字状の凹状溝４０が形成されている。対向する傾斜壁面１２、２２の下端部近傍は、互いに離間する方向の傾斜面１３、２３とされ、さらに、傾斜面１３、２３の下端部は断面Ｕ字状をなす壁面２４により連接されていて、そこに、凹状溝４０に連通する溜まり溝４０Ａを形成している。
【００１３】
この形態の断熱コンテナ１Ａでは、溶融樹脂５０の収容容積が溜まり溝４０Ａの容積だけ実質的に増えることとなり、その分だけ、同じ量の溶融樹脂でシールをする場合に、従来のものと比較して、凹状溝４０の容積を小さくすることができる。それにより、第１の凸条１１と第２の凸条２１の高さを低くすることができ、断熱コンテナ１Ａの外回りの専有面積は小さくなる。また、溜まり溝４０Ａの容積を大きくとるか、第１の凸条１１と第２の凸条２１の高さをやや高めとすることにより、第１の凸条１１と第２の凸条２１の先端にバリが発生するのも阻止できる。また、内装体１０と外装体２０の突き合わせ部と溶融樹脂との接触面積も、断面Ｕ字状をなす壁面２４の距離だけ従来のものよりも大きくなるので、より高いシール強度が得られる。
【００１４】
図２は、内装体１０と外装体２０の突き合わせ部の他の形態を示している。この形態では、溜まり溝４０Ａの断面形状がほぼ円形とされている。他の構成は、図１に示したものと同じである。この場合でも、同様な効果が奏されることは説明を要しない。
【００１５】
図３は、図１または図２に示される内装体１０と外装体２０の突き合わせ部に熱可塑性樹脂である溶接棒６０を溶融しながら、凹状溝４０および溜まり溝４０Ａに充填していく状態を説明している。内装体１０、発泡樹脂からなる断熱層３０および外装体２０を、図１あるいは図２に示すように一体に組み付けた後、凹状溝４０が垂直面となるようにして、図示しない機台にセットする。その状態で溶接棒案内治具７０を凹状溝４０の上にセットする。
【００１６】
溶接棒案内治具７０は、溶接棒案内孔７１と熱風送給孔７２とを有し、２つの孔は先端で一体になっている。溶接棒案内孔７１の移動方向下流側には、凹状溝４０の上端での溝幅よりもやや狭い幅の舌片７３が形成されており、溶接時に該舌片７３は凹状溝４０内を溝に沿って移動する。
【００１７】
溶接に際して、溶接棒案内治具７０を、溶接棒案内孔７１に溶接棒６０の先端を差し込み、舌片７３を凹状溝４０内に入り込ませた状態で、凹状溝４０の上に配置する。その状態で熱風送給孔７２から熱風Ｈを送り込むと、溶接棒６０は先端から次第に溶融していき、溶融樹脂５０は凹状溝４０内に流入する。流入した溶融樹脂は直後に舌片７３により上から押さえ込まれるために、上方に浮き出ることはなく、バリを出すことなく、積極的に溜まり溝４０Ａ内に押し込まれる。その状態を凹状溝４０の全長にわたって行うことにより、内装体１０と外装体２０の突き合わせ部の熱可塑性樹脂による溶接は終了する。
【００１８】
【発明の効果】
上記のように、本発明によれば、内装体と外装体との間に断熱材を介装した断熱コンテナにおいて、内装体と外装体との突き合わせ部分のシール強度を低下させることなく、突き合わせ部分の高さを従来のものよりも低くすることができ、外回りスペースを小さくすることができる。また、突き合わせ部分に溶融樹脂のバリが発生するのも容易に防止することができる。
【図面の簡単な説明】
【図１】本発明による断熱コンテナの要部を示す断面図。
【図２】本発明による断熱コンテナの他の形態での要部を示す断面図。
【図３】内装体と外装体の突き合わせ部を溶接する状態を説明する図。
【図４】断熱コンテナの全体を説明する斜視図。
【図５】図４のＶ−Ｖ線による断面図。１Ａ…断熱コンテナ、１０…内装体、１１…第１の凸条、２０…外装体、２２…第２の凸条、２４…断面Ｕ字状をなす壁面、３０…断熱層、４０…凹状溝、４０Ａ…溶融樹脂の溜まり溝、５０…溶融樹脂、５１…嵌合溝、５２…嵌合突部、６０…溶接棒、７０…溶接棒案内治具、７１…溶接棒案内孔、７２…熱風送給孔、７３…舌片[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat insulating container, and more particularly, to a heat insulating container that can be effectively used as a food transport container, a raw food cold storage container, a heat storage container, or the like.
[0002]
[Prior art]
As shown in FIG. 4 and FIG. 5 as a container for transporting fresh food or as a container for transporting various products, a heat insulating layer made of a foamed resin between the interior body 10 and the exterior body 20 made of non-foamed synthetic resin. A heat insulating container 1 having a configuration in which 30 is interposed is known. The first ridge of the interior body 10 and the second ridge of the exterior body 20 are abutted against each other on the container surface side, and the abutting portion has a cross-sectional shape in which the width gradually decreases toward the bottom. A concave groove 40 is formed, and a thermoplastic resin 50 which is a welding rod is run along the concave groove 40 and melted with hot air to fill the concave groove 40, thereby closing the butt portion. It has become.
[0003]
Further, in order to stabilize the assembly of the interior body 10 and the exterior body 20 and to prevent the heat insulating layer 30 made of the foamed resin from being damaged by heat generated at the time of welding of the butt portion, the interior body 10 is not damaged. The fitting groove 51 that is recessedly formed in one of the body 10 and the exterior body 20 is provided with a fitting locking portion that is formed by fitting a fitting protrusion 52 that is formed protruding from the other. In the figure, reference numeral 90 denotes a container container lid (see Japanese Utility Model Publication Nos. 59-11099, 2000-229675, etc.).
[0004]
Since the heat insulation container 30 of such a form covers the heat insulation layer 30 made of foamed resin with the interior body 10 and the exterior body 20 which are non-foamed synthetic resins, the strength as a container is stable with high heat insulation. It can be used repeatedly for a long time. Moreover, since the joining end part of the interior body 10 and the exterior body 20 is welded by the thermoplastic resin 50, high sealing performance is obtained, and moisture enters the inside even if water washing and hot water disinfection are complicated. Excellent waterproofness without any need.
[0005]
[Problems to be solved by the invention]
In the container 1 having the above-described configuration, in order to ensure the sealing strength of the butt portion between the inner body 10 and the outer body 20, it is desired to fill the molten thermoplastic resin to a predetermined depth in the concave groove 40. . It is not easy to fill the entire inside of the concave groove 40 with the thermoplastic resin that is gradually melted by hot air, and the depth of the molten resin required for sealing and the actual concave groove are not easy. If the depth is the same, the molten resin protrudes out of the concave groove 40 and generates burrs. Therefore, in the prior art, as shown in FIG. 5, the depth of the concave groove 40 is set to be deeper than the depth required for ensuring the sealing strength, that is, the first protrusion and the exterior of the interior body 10. It is assumed that the height of the second ridge of the body 20 is higher than originally required, so that the wall surface 41 of the concave groove 40 remains above the molten resin 50 and burrs are generated. It was preventing. Therefore, relatively large ridges are formed on the four circumferential surfaces of the container 1 as a result, and the area occupied by the container 1 is increased.
[0006]
The present invention has been made in view of the above circumstances, and the height of the butted portion is made lower than the conventional one without reducing the sealing strength of the butted portion between the interior body 10 and the exterior body 20. It is an object of the present invention to provide an improved heat insulation container that can prevent the occurrence of burrs of molten resin at the butt portion, and a method for manufacturing the same.
[0007]
[Means for Solving the Problems]
A heat insulating container according to the present invention for solving the above-mentioned problems is a heat insulating container having a form in which a heat insulating layer made of a foamed resin is interposed between an interior body made of a non-foamed synthetic resin and an exterior body. The ends of the body are abutted against each other on the container surface side, and a concave groove having a cross-sectional shape that gradually decreases in width toward the bottom is formed at the abutting portion. In a heat insulating container formed by welding with a plastic resin and closing and abutting the butted portion, a reservoir groove for molten thermoplastic resin communicating with the concave groove is formed at the bottom of the concave groove. To do.
[0008]
In the heat insulating container according to the present invention, a reservoir groove for the molten thermoplastic resin is formed at the bottom of the concave groove. Therefore, compared with the conventional heat insulation container without such a storage groove, the space for containing the molten resin is increased by the amount of the storage groove, and the contact between the inner body and the butted portion of the exterior body and the molten resin The area also increases by the amount of the accumulation groove. Therefore, even if the depth of the concave groove itself formed at the end of the interior body and the end of the exterior body is set lower than the conventional one, the required molten resin depth can be obtained and the required seal strength Is obtained. Moreover, generation | occurrence | production of a burr | flash can also be suppressed. As a result, the height of the butt portion can be made lower than the conventional one, and the area occupied by the heat insulating container can be reduced.
[0009]
According to the present invention, as a method of manufacturing the heat insulating container, the inner body, the heat insulating layer made of foamed resin, and the outer body are assembled together, and then along the concave groove formed in the butt portion between the inner body and the outer body. The thermoplastic resin that is the welding rod is moved while melting, and the molten thermoplastic resin is pressed toward the pool groove from the open side of the concave groove in parallel with the movement of the welding rod. A method for manufacturing a container container is also disclosed. According to this method, since the molten thermoplastic resin is positively pressed from the opening side of the concave groove toward the accumulation groove and is filled, welding can be surely and quickly performed, and the occurrence of burrs can be reliably suppressed. .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on embodiments. In addition, in the heat insulation container 1A by this invention, except the structure of the butting | matching part of the 1st protruding item | line of the interior body 10 and the 2nd protruding item | line of the exterior body 20, other structures are shown in FIG. 4 and FIG. Can be the same. Therefore, in the following, only the butted portion will be described in detail, and description of the other portions will be omitted.
[0011]
FIG. 1 is a cross-sectional view showing a main part of a heat insulating container 1A according to the present invention, in which a heat insulating layer 30 made of a foamed resin is accommodated between an interior body 10 made of a non-foamed synthetic resin and an exterior body 20. Examples of the resin material include polystyrene resins, polyolefin resins such as polyethylene and polypropylene, and polyester resins. From the viewpoint of strength and cost, polystyrene resins and polypropylene resins are preferable. In this example, a recessed fitting groove 51 is formed at the end of the interior body 10, and a fitting protrusion 52 that fits into the fitting groove 51 is formed at the end of the exterior body 20. In addition, the fitting groove 51 and the fitting protrusion 52 are fitted and locked to stabilize the assembly of the interior body 10 and the exterior body 20.
[0012]
A first ridge 11 bulging outward is formed at the lower end on the surface side of the end portion of the interior body 10, and the first ridge 11 is opposed to the upper end on the surface side of the end portion of the exterior body 20. The 2nd protruding item | line 21 is formed in the position. And the V-shaped recessed groove | channel 40 is formed between both by the inclined wall surfaces 12 and 22 which the 1st protruding item | line 11 and the 2nd protruding item | line 21 mutually oppose. Near the lower end portions of the opposing inclined wall surfaces 12 and 22 are inclined surfaces 13 and 23 in directions away from each other, and the lower end portions of the inclined surfaces 13 and 23 are connected by a wall surface 24 having a U-shaped cross section. A reservoir groove 40A communicating with the concave groove 40 is formed there.
[0013]
In the heat insulating container 1A of this form, the accommodation volume of the molten resin 50 is substantially increased by the volume of the accumulation groove 40A, and when sealing with the same amount of the molten resin, the amount is compared with the conventional one. Thus, the volume of the concave groove 40 can be reduced. Thereby, the height of the 1st protruding item | line 11 and the 2nd protruding item | line 21 can be made low, and the exclusive area of the outer periphery of 1 A of heat insulation containers becomes small. In addition, by increasing the volume of the accumulation groove 40A or by slightly increasing the height of the first ridges 11 and the second ridges 21, the first ridges 11 and the second ridges 21 It is possible to prevent burrs from occurring at the tip. Further, since the contact area between the butted portion of the interior body 10 and the exterior body 20 and the molten resin is also larger than the conventional one by the distance of the wall surface 24 having a U-shaped cross section, higher sealing strength can be obtained.
[0014]
FIG. 2 shows another form of the butted portion between the inner body 10 and the outer body 20. In this form, the cross-sectional shape of the accumulation groove 40A is substantially circular. Other configurations are the same as those shown in FIG. Even in this case, it is not necessary to explain that the same effect is produced.
[0015]
FIG. 3 shows a state in which the concave groove 40 and the accumulation groove 40A are filled while the welding rod 60, which is a thermoplastic resin, is melted at the butt portion between the inner body 10 and the outer body 20 shown in FIG. Explains. After the interior body 10, the heat insulating layer 30 made of foamed resin, and the exterior body 20 are assembled together as shown in FIG. 1 or 2, the concave groove 40 is set to a vertical surface so that the concave groove 40 becomes a vertical surface. To do. In this state, the welding rod guide jig 70 is set on the concave groove 40.
[0016]
The welding rod guide jig 70 has a welding rod guide hole 71 and a hot air supply hole 72, and the two holes are integrated at the tip. A tongue piece 73 having a width slightly narrower than the groove width at the upper end of the concave groove 40 is formed on the downstream side in the moving direction of the welding rod guide hole 71, and the tongue piece 73 is grooved in the concave groove 40 during welding. Move along.
[0017]
At the time of welding, the welding rod guide jig 70 is disposed on the concave groove 40 with the tip of the welding rod 60 inserted into the welding rod guide hole 71 and the tongue piece 73 entering the concave groove 40. When hot air H is fed from the hot air feed hole 72 in this state, the welding rod 60 gradually melts from the tip, and the molten resin 50 flows into the concave groove 40. Since the molten resin that has flowed in is immediately pressed from above by the tongue piece 73, it does not float upward and is actively pushed into the accumulation groove 40A without causing burrs. By performing this state over the entire length of the concave groove 40, welding with the thermoplastic resin at the butted portion of the interior body 10 and the exterior body 20 is completed.
[0018]
【The invention's effect】
As described above, according to the present invention, in the heat insulating container in which the heat insulating material is interposed between the interior body and the exterior body, the butt portion is obtained without reducing the sealing strength of the butt portion between the interior body and the exterior body. Can be made lower than the conventional one, and the outer space can be reduced. Moreover, it is possible to easily prevent the molten resin from being generated at the butt portion.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a main part of a heat insulating container according to the present invention.
FIG. 2 is a cross-sectional view showing a main part of another embodiment of the heat insulating container according to the present invention.
FIG. 3 is a diagram for explaining a state in which a butted portion between an interior body and an exterior body is welded.
FIG. 4 is a perspective view illustrating the entirety of a heat insulating container.
5 is a cross-sectional view taken along line VV in FIG. DESCRIPTION OF SYMBOLS 1A ... Thermal insulation container, 10 ... Interior body, 11 ... 1st protruding item | line, 20 ... Exterior body, 22 ... 2nd protruding item | line, 24 ... Wall surface which makes cross-sectional U shape, 30 ... Thermal insulation layer, 40 ... Concave groove 40A ... Molten resin pool groove, 50 ... Molten resin, 51 ... Fitting groove, 52 ... Fitting projection, 60 ... Welding rod, 70 ... Welding rod guide jig, 71 ... Welding rod guide hole, 72 ... Hot air Feeding hole, 73 ... tongue

Claims (3)

非発泡合成樹脂よりなる内装体および外装体の両者間に発泡樹脂からなる断熱層を介装した形態の断熱コンテナであり、内装体と外装体の端部同士はコンテナ表面側で互いに突き合わされていて、該突き合わせ部分には底部に向けて次第に幅が狭くなる断面形状を持つ凹状溝が形成されており、該凹状溝に沿って熱可塑性樹脂による溶接をなして前記突き合わせ部分を閉塞一体化してなる断熱コンテナにおいて、前記凹状溝の底部には凹状溝に連通した溶融熱可塑性樹脂のための溜まり溝が形成されていることを特徴とする断熱コンテナ。It is a heat insulating container in a form in which a heat insulating layer made of foamed resin is interposed between an interior body and an exterior body made of non-foamed synthetic resin, and the ends of the interior body and the exterior body are abutted against each other on the container surface side. Te, the said butt portion and the concave groove is formed with a sectional shape having a width gradually narrowed toward the bottom, and the abutting portion forms a welding with thermoplastic resin along the concave groove closing integrated A heat insulating container according to claim 1, wherein a reservoir groove for molten thermoplastic resin communicating with the concave groove is formed at the bottom of the concave groove. 内装体および外装体は、そのいずれか一方に凹入形成した嵌合溝に他方に突出形成した嵌合突部を嵌入してなる嵌合係止部を備えており、前記突き合わせ部分は該嵌合係止部以外の位置に形成されていることを特徴とする請求項１記載の断熱コンテナ。The inner body and the outer body each include a fitting locking portion formed by fitting a fitting protrusion that is formed to protrude into the other into a fitting groove that is recessed into one of the inner body and the fitting portion. The heat insulation container according to claim 1, wherein the heat insulation container is formed at a position other than the mating locking portion. 請求項１または２記載の断熱コンテナの製造方法であって、内装体、発泡樹脂からなる断熱層および外装体を一体に組み付けた後、前記突き合わせ部分に形成される凹状溝に沿って溶接棒である熱可塑性樹脂を溶融しながら移動させ、かつ、溶接棒の移動と並行して溶融した熱可塑性樹脂を凹状溝の開放側から前記溜まり溝に向けて押し付けていくことを特徴とする断熱コンテナの製造方法。It is a manufacturing method of the heat insulation container of Claim 1 or 2, Comprising: After an interior body, the heat insulation layer which consists of foamed resin, and an exterior body are assembled | attached integrally, it is a welding rod along the concave groove formed in the said butt | matching part. A heat insulating container characterized in that a certain thermoplastic resin is moved while being melted, and the molten thermoplastic resin is pressed from the open side of the concave groove toward the pool groove in parallel with the movement of the welding rod. Production method.
JP2001127397A 2001-04-25 2001-04-25 Insulated container and manufacturing method thereof Expired - Lifetime JP4365050B2 (en)

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JP7249934B2 (en) * 2019-12-25 2023-03-31 グローブライド株式会社 Insulated box
CN114962484A (en) * 2021-02-23 2022-08-30 崔炳善 Inner plunger of electromagnetic valve assembly for clutch of automobile differential mechanism and manufacturing method thereof
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