JP2004010110A - Box for carrying substrate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a box for carrying substrates in which a storage space for the time when the substrate is not stored is reduced, and only a broken part can be replaced even when a main body part is partly broken, and even when the main body part is enlarged, it is easily molded and generation of articles of inferior quality is little. <P>SOLUTION: The box for carrying the substrates is constituted of a cylindrical bottomless box main body part, a lid body part and a bottom body part, and the lid body part and the bottom body part are removably formed to the main body part. A space for storing a plurality of the substrates is formed in the box main body part, and channels for supporting the substrates are formed on a pair of faces opposing to each other of the inner faces of the main body part. The main body part, the lid body part and the bottom body part are all formed of a synthetic resin foam molding body, and the main body part is formed so as to be dismantled into at least two members, and horizontal cross-sections of at least two members among at least two members exhibit U-like shapes. <P>COPYRIGHT: (C)2004,JPO

Description

で表されるイソフタル酸を使用するか、あるいはジオールとしてシクロヘキサンジメタノールを使用するか、またはこの両者を併用するとともに、いずれか一方を単独で使用する場合はその単独での含有割合を、また両者を併用する場合はその合計の含有割合を、それぞれ全成分中の０．５〜１０重量％の範囲内としたものが挙げられる。
【００２９】
なお、イソフタル酸および／またはシクロヘキサンジメタノールの含有割合は、上記各特性のバランスを考慮して、良好な発泡粒子ならびに良好な発泡成形体を製造することを考慮すると、上記の範囲内でも特に０．６〜９．５重量％程度であることが好ましく、０．７〜９重量％程度であることがさらに好ましい。上記のうちシクロヘキサンジメタノールとしては、基本的に、２つのメタノール部分がそれぞれシクロヘキサン環の１位と４位に置換した、下記式（２）
【００３０】
【化２】

で表される１，４−シクロヘキサンジメタノールが使用される。但し、２つのメタノール部分がシクロヘキサン環の他の位置に置換した異性体も、少量であれば併用可能である。上記イソフタル酸、およびシクロヘキサンジメタノールとともに熱可塑性ポリエステル系樹脂を構成する他の成分のうちジカルボン酸としては、たとえばテレフタル酸やフタル酸などが挙げられる。
【００３１】
またジオール成分としては、たとえばエチレングリコール、α−ブチレングリコール（１，２−ブタンジオール）、β−ブチレングリコール（１，３−ブタンジオール）、テトラメチレングリコール（１，４−ブタンジオール）、２，３−ブチレングリコール（２，３−ブタンジオール）、ネオペンチルグリコールなどが挙げられる。
【００３２】
また熱可塑性ポリエステル系樹脂の原料には、上記の各成分に加えて、たとえば酸成分として、トリメリット酸などのトリカルボン酸や、ピロメリット酸などのテトラカルボン酸などの、三価以上の多価カルボン酸やその無水物、あるいはアルコール成分として、グリセリンなどのトリオール、ペンタエリスリトールなどのテトラオールなどの、三価以上の多価アルコー一ルなどを、前述した、熱可塑性ポリエステル系樹脂の結晶性や結晶化の速度などに影響を及ぼさない範囲で少量、含有させてもよい。
【００３３】
上記の熱可塑性ポリエステル系樹脂は、上記の各成分を所定の割合、つまり前記のようにイソフタル酸および／またはシクロヘキサンジメタノールを、総量で０．５〜１０重量％の範囲で含有した原料を、従来同様に重縮合反応させることによって製造される。また上記熱可塑性ポリエステル系樹脂は、イソフタル酸および／またはシクロヘキサンジメタノールの含有割合の異なる２種以上の熱可塑性ポリエステル系樹脂を、その全成分中に占めるイソフタル酸および／またはシクロヘキサンジメタノールの含有割合が総量で０．５〜１０重量％の範囲内となるように配合し、たとえば押出機などを用いて、加熱下で溶融混合することによっても製造できる。
【００３４】
発泡粒子の製造段階において、イソフタル酸および／またはシクロヘキサンジメタノールの含有割合の異なる２種以上の熱可塑性ポリエステル系樹脂の配合割合を変更すれば、製造された予備発泡粒子における上記両成分の含有割合を調整できる。このため、発泡粒子の製造段階で両成分の含有割合を調整することが、樹脂の合成段階で両成分の含有割合を調整する場合に比べて、調整作業を簡略化できると共に、仕様の変更などに柔軟に対応できるようになるという利点がある。
【００３５】
また、発泡粒子の製造段階で両成分の含有割合を調整する方法は、たとえば配合する熱可塑性ポリエステル系樹脂の１種として、使用済みのペットボトルなどから回収、再生した材料などを使用することにより、資源の有効な再利用化とゴミの減量化、ならびに予備発泡粒子の低コスト化を図ることが可能となるという利点もある。なお上記の方法においては２種以上の熱可塑性ポリエステル系樹脂間でのエステル交換反応により各樹脂がアロイ化して均一な熱可塑性ポリエステル系樹脂となるように、加熱下で十分に溶融、混合することが好ましい。
【００３６】
前記ポリエステル系樹脂を構成する基材樹脂には、帯電防止剤、気泡調節剤、難燃剤、難燃助剤、無機充填剤等の各種添加剤を必要に応じて必要量を添加することができる。
【００３７】
本発明の搬送用ボックスを構成する上記ポリエステル系樹脂発泡体は従来公知の方法で製造することができる。但し、好ましくは、いわゆる型内成形方法により製造することが好ましい。即ち、ポリエステル系樹脂から押出機を用いて樹脂粒子を形成し、該樹脂粒子を発泡させて発泡粒子を形成し、該発泡粒子を金型内に充填し、所定の温度に加熱し、次いで冷却することにより製造することが好ましい。
【００３８】
前記ポリエステル系樹脂発泡体の発泡倍率（基材樹脂の密度÷発泡体の見掛け密度）は、基材樹脂であるポリエステル系樹脂の種類、収納する基板の大きさや重さ、ボックスの壁厚み等に応じて決定されるが、通常は、３〜５０倍（見掛け密度０．４５〜０．０２７ｇ／ｃｍ^３）が好ましく、５〜３０倍（見掛け密度０．２７〜０．０４５ｇ／ｃｍ^３）がより好ましく、１５〜２５倍（見掛け密度０．０９〜０．０５４ｇ／ｃｍ^３）が更に好ましい。該発泡倍率が３倍未満の場合は、発泡体特有の軽量性が失われる虞があり、５０倍を超える場合は機械的強度が低下しすぎる虞がある。
【００３９】
本発明の搬送用ボックス１を構成する蓋体部３及び底体部４は本体部２に着脱可能に形成されている。即ち、該搬送用ボックス１は、各々の構成部材ごとに容易に分解することができる。従って、基板を収容していない場合は、分解して保管することができるので、保管費用や輸送にかかる費用が従来の搬送用ボックスと比較すると安くなる。また、いずれの部材が破損した場合であっても、その部材だけを交換することができるので、取り替え費用が安くて済む。更に、大型の金型の作成が安価で成形が容易となり、成形後の離型時に各構成部材が破損するということもない。
【００４０】
本発明において、上記蓋体部３が本体部２に着脱可能に形成するには、従来行われてきたように、例えば図１に示すように、本体部２の上端部の外側を段状に形成し、該段状に形成された内側の段部７の外側周面の形状に対応する内側周面を有する段部８を蓋体部３の内側に形成し（図２）、段部７と段部８が嵌合するように蓋体部３を取り付ければよい。
尚、図２（ａ）は蓋体部３の正面図、同（ｂ）は裏面図である。
【００４１】
上記底体部４が本体部２に着脱可能に形成するには、前述した蓋体部３と同様に、例えば図１に示すように、本体部２の下端部の外側を段状に形成し、該段状に形成された内側の段部９の外側周面の形状に対応する内側周面を有する段部１０を底体部４の内側に形成し、段部９と段部１０が嵌合するように底体部４を取り付ければよい。
【００４２】
本発明の蓋体部３と底体部４は、このように同形状に構成することが好ましい。蓋体部３と底体部４が同形状の場合は、蓋体部３、底体部４を製造するための金型が１種類で済むので効率的である。また、蓋体部３と底体部４を誤って選択することがないので便利である。更に、蓋体部３、底体部４の一が破損した場合、破損した部材と異なる部材を誤って補充するという間違いが起こることがない。
【００４３】
本体部２と蓋体部３との嵌合は（本体部２と底体部４との間の嵌合も）、発泡体同士の間の摩擦力が大きいので単なる嵌め込みで充分である。しかしながら、ガス置換を行う場合又はその嵌合を強固にしたい場合には、両者が嵌合する個所を波形に形成するなど嵌合部の面積を大にすればよい。
【００４４】
本発明の本体部２の内部には、図１に示すように、複数の基板Ｐを収容する空間が形成されていると共に、該本体部の内面の相対向する一対の面には基板支持用の溝６ａと溝６ｂ（尚、溝６ａ、溝６ｂ等を総称して溝６と称する。）が形成されている。該本体部２は、このように形成されているので、対向する溝６ａと溝６ｂに基板Ｐの対向するエッジ部を挿入して基板Ｐを保持することにより、本体部２の内部に複数の基板Ｐを傷つけることなく収容することができる。
【００４５】
尚、上記溝６を形成する場合、本体部２の内面のみならず蓋体部３の内壁面にも基板支持用の溝６ｃを形成することができ、また底体部４の内壁面にも基板支持用の溝６ｄを形成することができる。このように溝６が構成されていると、基板Ｐの保持性がより優れたものとなる。
【００４６】
又、本体部２内面の相対向するもう一対の側面には溝を形成しないのが通常であるが、他の寸法の基板を収容可能にするために溝を形成することもできる。
【００４７】
上記基板支持用の溝６は、前記型内成形と同時に形成することが好ましいが、溝６が形成された内挿部材を取り付け、配置してもよい。溝６ａ、溝６ｂの部分は他よりも破損される可能性が高いので交換可能になっていると好都合である。かかる内挿部材としては、特開平７−２５７６８１号公報或いは特開平８−３０１３５４号公報に記載された形状のもの（特開平７−２５７６８１号公報では「溝付き内挿部材」と表現されたものであり、特開平８−３０１３５４号公報では「緩衝体４ａ，４ｂ」と表現されたもの）が好適に使用される。
【００４８】
上記溝６は、基板Ｐのエッジ部を挿入できる深さ及び幅に形成し、かつ基板Ｐを挿入した状態で若干の余裕があるように設定する。溝数は任意に設定できるが、基板を挿入した状態で容易に運ぶことができることを考慮して、１５〜５０の条数とすることが好ましい。
【００４９】
本発明の搬送用ボックス内部を不活性ガスで置換する使い方をするときは、本体部２あるいは蓋体部３の適当な個所にはガス導入口を設置する。
【００５０】
本発明の搬送用ボックスに、ＴＦＴ（薄膜トランジスタ）形成済みのガラス基板や液晶セルの完成パネルを収容するときは、搬送用ボックスの少なくとも基板と接する箇所または接する可能性のある箇所（好ましくは搬送用ボックス全体）は、導電性ポリマーや帯電防止性物質を数％〜数１０％含有させた合成樹脂を発泡させるなどの方法により、体積固有抵抗値が１０^３〜１０^１２Ω・ｃｍの合成樹脂発泡体とすることが望ましい。これにより必要な帯電防止性が得られる。
【００５１】
本発明の搬送用ボックス１においては、本体部２が、図３（ａ）に示すように２つの部材１１ａと部材１１ｂに分解可能に形成されており、該２つの部材１１ａ、１１ｂの水平断面が、図３（ｂ）に示すようにコ字状を呈する。但し、本発明は本体部２が２つの部材で構成されることに限定するものではなく、例えば２つの部材１１ａと部材１１ｂと同形状の部材を更に２つ用いて２段重ねにしてもよい。
尚、図３（ａ）は本体部２が分解された状態の斜視図、同（ｂ）は図３（ａ）における部材１１ａの平面図である。
【００５２】
本発明の搬送用ボックス１は、前述したように、蓋体部３及び底体部４が本体部２に着脱可能に形成されている上に、更に本体部２がコ字状の部材１１ａと部材１１ｂに分解することができるのでよりコンパクトに収納することができ、保管スペースが更に縮小される。又、本体部２の一部が破損した場合には、本体部の全てではなく、その破損した部材みをとりかえればよいので無駄が少ない。
【００５３】
更に、コ字状を呈する部材１１ａ、１１ｂ（以下、これらを部材１１と総称する。）は加熱成形が容易で、不良品発生率が少ないという利点がある。即ち、本体部２の壁は垂直又はほぼ垂直に形成されているため本体部２が大型化するほど離型が難しくなり離型時に破壊される可能性が大きくなる。従って、本体部２が大型化するほど１つの部材として成形することが困難になり、不良品発生率も大きくなる。これに対して、水平断面がコ字状を呈する部材１１は、離型しやすく不良品発生率が少ない。
【００５４】
該水平断面がコ字状の部材１１は、いずれも同形状であることが好ましい。該部材１１がいずれも同形状の場合は、部材１１を製造するための金型が１種類で済むので効率的である。また、本体部２を組み立てる際に部材１１ａ、と部材１１ｂを誤って選択することがないので便利である。更に、部材１１の一が破損した場合、破損した部材と異なる部材を誤って補充するという間違いが起こることがない。
【００５５】
上記本体部２は、３つ以上の部材に分解可能に形成されていることが好ましい。更に、該３つ以上の部材の内少なくとも２つの部材の水平断面がコ字状を呈すると共に、少なくとも１つの部材の水平断面がロ字状を呈することが好ましい。具体的には、例えば本体部２が図４に示すように、上記２つの水平断面がコ字状を呈する部材１１ａ、部材１１ｂと水平断面がロ字状を呈する部材１１ｃからなることが好ましい。
【００５６】
上記水平断面がロ字状を呈する部材１１ｃを、部材１１ａと部材１１ｂを水平方向に接合することにより形成された部材に上方から取り付けるには、例えば、部材１１ａと部材１１ｂが水平方向に接合された部材の上端の外側を段状に形成し、該段状に形成された内側の段部１３の外側周面の形状に対応する内側周面を有する段部１４を部材１１ｃの内側に形成し、段部１３と段部１４が嵌合するようにすればよい。
【００５７】
このように構成された本体部２は、平断面がコ字状を呈する部材１１ａと部材１１ｂを相互に水平方向に接合した状態で、その上から水平断面が口字状を呈する部材１１ｃが取り付けられているので、部材１１ａと部材１１ｂと部材１１ｃが一体化して本体部２を形成している。従って、蓋体部３を外しても本体部２が崩れることがない。また、部材１１ｃを取り外すと、部材１１ａと部材１１ｂを分解できるのでコンパクトに収納することができる。
【００５８】
但し、本発明は部材１１ａと部材１１ｂの上方から部材１１ｃを取り付けることに限定するものではなく、下方から取り付けてもよい。更に部材１１ａと部材１１ｂの上方及び下方から水平断面が口字状を呈する他の部材を嵌合させて取り付けてももよい。尚、このように構成する場合は、部材１１ｃと下方から取り付ける他の部材は同一形状であることが好ましい。
【００５９】
本発明の本体部２は、図４に示すように、部材１１ａのコ字状の開口された先端部１５ａと部材１１ｂのコ字状の開口された先端部１５ｂを接合することができ、部材１１ａのコ字状の開口された先端部１６ａと部材１１ｂのコ字状の開口された先端部１６ｂを接合することができ、この接合により本体部２を又は本体部２の一部を構成することができる。
尚、図４に示す接合においては、先端部１５ａ及び先端部１５ｂの垂直方向に沿って横断面がＬ字状態のほぞが対応する形状に形成され、部材１１ａと１１ｂとが水平方向に接合されている。
【００６０】
本発明において、このように部材１１ａと１１ｂを水平方向に接合するに際しては、図３に示すように、該先端部１５ａの垂直方向に沿って凸部又は凸条１７ａが形成され、他方の先端部１５ｂの垂直方向に沿って該凸部又は凸条１７ａと嵌合しうる凹部又は凹条１７ｂが形成され、先端部１６ｂの垂直方向に沿って凸部又は凸条１８ｂが形成され、他方の先端部１５ａの垂直方向に沿って該凸部又は凸条１８ｂと嵌合しうる凹部又は凹条１８ａが形成されていることが好ましい。
【００６１】
このように部材１１ａと部材１１ｂが各々のコ字状の開口された先端部どうしを嵌合することにより水平方向に接合していると、部材１１ａと部材１１ｂのずれが生じにくくなるので本体部２の形状安定性がより高まり、ゴミの進入も効果的に防ぐことができる。
【００６２】
尚、本明細書において、凸部又は凸条が形成されとあるのは、接合するコ字状の一方の先端部の垂直方向に沿って凸条が連続的に設けられていてもよく、凸部が不連続的に設けられていてもよいことを意味する。また、凹部又は凹条が形成されているとあるのは、前記凸部又は凸条と嵌合することさえできれば、凹条が連続的に設けられていてもよく、凸部が不連続的に設けられていてもよいことを意味する。
【００６３】
本発明の搬送用ボックス１においては、組み立てられた本体部２の水平方向周囲を紐状物で固定することが好ましい（図示はしない。）。このように構成すると、本体部２の形状安定性が高まり、蓋体３を外した時に本体部２が崩れてバラバラになることを容易に防ぐことができる。
【００６４】
また、本発明の搬送用ボックス１においては、その内部に複数の基板を収容した状態で、その上下方向周囲を紐状物で固定することが好ましい（図示はしない。）。このように構成すると、基板を収容した状態で底抜けの防止を図ることができる。
【００６５】
また、遠方への輸送（例えば輸出）に際しては、基板を収容した搬送用ボックス全体を、ポリオレフィンフィルムやアルミニウムラミネートフィルムなどの防湿性を有する包材で包装することが好ましい。包装に際しては内部にシリカゲル等の吸湿剤を入れておくこともできる。
【００６６】
【発明の効果】
本発明の基板搬送用ボックスは、無底のボックス本体部、蓋体部及び底体部により構成され、これらは着脱可能に形成されているので、保管費用や返送にかかる費用が従来の搬送用ボックスと比較すると安くなる。また、いずれの構成部材が破損した場合であっても、その部材だけを交換することができるので、取り替え費用が安くて済む。更に、大型化する場合に金型の作成や成形が容易となり、成形後の離型時に各構成部材が破損するということもない。
【００６７】
本発明においては、前記本体部が２つ以上の部材に分解可能に形成されており、該２つ以上の部材の内少なくとも２つの部材の水平断面がコ字状を呈するので、よりコンパクトに収納することができ、保管スペースが更に縮小される。又、本体部２の一部が破損した場合には、本体部の全てではなく、その破損した部材みをとりかえればよいので無駄が少ない。更に、本体部を大型化する場合であっても、容易に離型でき破損を防ぐことができるので、より不良品発生率が少ない。
【００６８】
本発明においては、該本体部を構成する少なくとも１つの部材の水平断面がロ字状を呈するという構成を採用すると、２つのコ字状の部材を水平方向に接合してロ字状に組み合わせ、その上から水平断面が口字状を呈する部材を嵌合させることにより、蓋体部を外した場合に本体部がバラバラに崩れることを防ぐことができる。
【００６９】
本発明においては、水平断面がコ字状の部材が、いずれも同形状であるという構成を採用すると、前記本体部を構成する少なくとも２つの部材を製造するための金型が１種類で済むので効率的である。また、本体部を組み立てる際に部材１を誤って選択することがないので便利である。
【００７０】
本発明においては、本体部を構成する二つの部材を水平方向に接合する場合、該接合するコ字状の一方の先端の垂直方向に沿って凸部又は凸条が形成され、他方の先端の垂直方向に沿って該凸部又は凸条と嵌合しうる凹部又は凹条が形成されているという構成を採用すると、部材どうしのずれが生じにくくなるので本体部の形状安定性がより高まり、ゴミの進入も効果的に防ぐことができる。
【図面の簡単な説明】
【図１】本発明による基板搬送用ボックスの構成例を示す斜視図である。
【図２】（ａ）は蓋体部（底体部）の正面図、（ｂ）は平面図である。
【図３】（ａ）は本体部の斜視図、（ｂ）は図３（ａ）における部材１１ａの平面図である。
【図４】本体部の他の態様を示す斜視図である。
【符号の説明】
１　　搬送用ボックス
２　　本体部
３　　蓋体部
４　　底体部
６ａ、６ｂ　　溝
１１ａ、１１ｂ、１１ｃ　　部材
１５ａ、１５ｂ　　先端部
１７ａ、１８ｂ　　凸条
１７ｂ、１８ａ　　凹条
Ｐ　　基板[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a substrate transport box for transporting a substrate while protecting the substrate from impact, dust, and the like.
[0002]
[Prior art]
A substrate transport box (hereinafter, also simply referred to as a transport box) made of a resin foam is used for transporting a substrate (including a completed panel) between a glass maker, a color filter maker, and a device maker. As such a box, for example, a bottomed main body portion and a lid portion, or a non-bottomed main body portion, a lid body portion and a bottom body portion, each of these members is made of a polyolefin resin foam, Japanese Patent Application Laid-Open Nos. Hei 7-1321986 and Hei 8-301354 propose a structure in which grooves for supporting a substrate are formed on a pair of opposed inner surfaces of the main body.
[0003]
[Problems to be solved by the invention]
The transport box described in the above-mentioned known document is excellent in protecting the substrate. However, the transport box described in the above-mentioned known document has the following problems.
[0004]
One of the problems is that since the main body constituting the conventional transport box is integrally formed, a large storage space is required even in a state where the substrate is not stored, so that the storage cost is high, To use it as a return box, the cost of returning it was high. Further, when the main body is partially damaged, the entire main body must be replaced, so that there is also a problem that there is much waste and the replacement cost is high.
[0005]
Further, as the size of the substrate increases, the size of the substrate transport box also increases, so that the cylindrical main body must be increased in size. As a result, there has been a problem in that the size of the molding die is increased due to the increase in the size of the main body, making the production of the die expensive and making the heating molding difficult. Further, it is difficult to release the molded body after molding, and there has been a problem that the molded body is easily broken at the time of release.
[0006]
The present invention has been made in view of the above-described problems of the related art, and a storage space when a substrate is not accommodated is reduced, and even if a main body part is partially damaged, only the damaged part is replaced. It is an object of the present invention to provide a box for transporting a substrate, which can be easily formed even if the main body becomes large and has a low incidence of defective products.
[0007]
[Means for Solving the Problems]
The inventor of the present invention has conducted intensive studies to solve the above-mentioned problems, and as a result, it has been found that the above-mentioned problems can be solved by forming a main body portion by dividing into a specific shape, assembling them when used, and disassembling when not in use. And completed the present invention. That is, according to the present invention, the following transport box is provided.
[0008]
(1) The box body includes a tubular bottomless box body, a lid, and a bottom, and the lid and the bottom are detachably formed on the body. A space for accommodating a plurality of substrates is formed inside the portion, and a pair of opposing surfaces on the inner surface of the main body portion are formed with grooves for supporting the substrate, and the main body portion and the lid are formed. The body portion and the bottom body portion are each a substrate carrying box formed of a synthetic resin foam molded body, wherein the main body portion is formed so as to be disassembled into two or more members, and the two or more body portions are formed. A horizontal box of at least two of the members has a U-shape.
(2) The main body is formed so that it can be disassembled into three or more members, and at least two of the three or more members have a U-shaped horizontal cross section, and at least one member has The substrate transport box according to (1), wherein the horizontal cross section has a square shape.
(3) The substrate transport box according to (1) or (2), wherein the members having a U-shaped horizontal cross section have the same shape.
(4) The main body includes a structure in which two U-shaped opened ends of a member having a U-shaped horizontal cross section are vertically joined to each other, and one end of the joined U-shape is joined. A protrusion or a ridge is formed along the vertical direction of the portion, and a recess or a ridge that can be fitted with the protrusion or the ridge is formed along the vertical direction of the other tip. The substrate transport box according to any one of the above (1) to (3).
(5) The substrate transport box according to any one of (1) to (4), wherein the periphery of the box in the horizontal direction of the main body is fixed with a cord.
(6) The substrate transport box according to any one of (1) to (5), wherein a plurality of substrates are accommodated in the box, and the periphery of the box in the vertical direction is fixed with a string-like object. .
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1, the transport box 1 of the present invention includes a tubular bottomless body 2, a lid 3, and a bottom 4.
FIG. 1 is a perspective view showing an example of the transport box 1 of the present invention.
[0010]
The box main body (hereinafter simply referred to as the main body) 2, the lid 3, and the bottom 4 are all made of synthetic resin foam. However, each component does not need to be made of the same synthetic resin, and the main body 2, the lid 3, and the bottom 4 may be made of different synthetic resins. Further, even when the main body 2, the lid 3, and the bottom 4 are formed of the same synthetic resin foam, they may be formed as members having different expansion ratios. By freely combining the material and the expansion ratio in this way, the protection of the substrate to be stored, the strength as a transport box, and an excellent balance of lightness can be achieved.
[0011]
Further, each of the main body part 2, the lid body part 3, and the bottom body part 4 made of a synthetic resin foamed molded body is provided on its inner surface and / or outer surface with a non-foamed synthetic resin molded body, a metal molded body or a composite molding thereof. A skin material made of a body may be integrated. With such a configuration, the robust transport box 1 is provided, and the internal substrate can be protected more safely.
[0012]
The base resin of the synthetic resin foam molded body constituting the main body 2, the lid 3, and the bottom 4 is not limited, but is preferably a polyolefin-based resin or a thermoplastic polyester resin. These resins can easily form a foamed molded product and have excellent chemical resistance. Further, the polyolefin resin is excellent in flexibility and cushioning property, and the thermoplastic polyester resin is excellent in wear resistance.
[0013]
Next, a case where the main body 2, the lid 3, and the bottom 4 of the present invention are formed of a foam using a polyolefin-based resin as a base resin will be described.
Examples of the polyolefin-based resin include those corresponding to any of the following (a) to (e).
(A) Homopolymers of α-olefins such as ethylene, propylene and butene.
(B) A copolymer of two or more α-olefins.
(C) a copolymer comprising an α-olefin component and another monomer component, wherein the α-olefin unit component ratio is 50% by weight or more, preferably 60% by weight or more, more preferably 70% by weight or more, Preferably at least 80% by weight, most preferably at least 90% by weight of the copolymer.
(D) A mixture of two or more selected from the group of (a), (b) and (c) above.
(E) one or more selected from the group of the above (a), (b), (c) and (d), and the above (a), (b), (c) or (d) Is a mixed resin composition with a different synthetic resin component or / and another synthetic elastomer component, wherein the unit ratio of the α-olefin component in the composition is 50% by weight or more, preferably 60% by weight or more, Preferably 70% by weight or more, more preferably 80% by weight or more, most preferably 90% by weight or more of the mixed resin composition.
[0014]
As the polyolefin-based resin foam constituting the transport box of the present invention, among the foams made of the polyolefin-based resin, those made of a polypropylene-based resin are preferable. Since the polypropylene-based resin foam has excellent strength, the same strength can be realized with a lighter weight than, for example, a polyethylene-based resin foam.
[0015]
In addition, as said polypropylene-type resin, the thing corresponding to any of following (f)-(i) is mentioned.
(F) Homopolymer of propylene.
And (g) a copolymer comprising a propylene component and another monomer component, wherein the propylene unit component ratio is 50% by weight or more, preferably 60% by weight or more, more preferably 70% by weight or more, and further preferably 80% by weight. % Or more, most preferably 90% by weight or more of the copolymer.
(H) a mixture of two or more selected from the group of (f) and (g) above.
(I) one or more selected from the group of (f), (g) and (h) above;
A mixed resin composition with another synthetic resin component and / or another synthetic elastomer component different from (f), (g) or (h), wherein the propylene component unit ratio in the composition is 50% by weight. % Or more, preferably 60% by weight or more, more preferably 70% by weight or more, still more preferably 80% by weight or more, and most preferably 90% by weight or more.
[0016]
Examples of the polyethylene resin include those corresponding to any of the following (j) to (m).
(J) A homopolymer of ethylene.
(K) a copolymer comprising an ethylene component and another monomer component, wherein the ethylene unit component ratio is 50% by weight or more, preferably 60% by weight or more, more preferably 70% by weight or more, further preferably 80% by weight % Or more, most preferably 90% by weight or more of the copolymer.
(L) a mixture of two or more selected from the groups (j) and (k).
(M) one or more selected from the group of the above (j), (k) and (l);
A mixed resin composition with another synthetic resin component and / or another synthetic elastomer component different from (j), (k) or (l), wherein the ethylene component unit ratio in the composition is 50% by weight. % Or more, preferably 60% by weight or more, more preferably 70% by weight or more, still more preferably 80% by weight or more, and most preferably 90% by weight or more.
[0017]
To the base resin constituting the polyolefin-based resin foam, various additives such as an antistatic agent, a cell regulator, a flame retardant, a flame retardant aid, and an inorganic filler are added in necessary amounts as necessary. Can be.
[0018]
The polyolefin-based resin foam constituting the transport box of the present invention can be manufactured by a conventionally known method. However, it is preferable to produce by a so-called in-mold molding method. That is, resin particles are formed from a polyolefin resin using an extruder, the resin particles are expanded to form expanded particles, the expanded particles are filled in a mold, heated to a predetermined temperature, and then cooled. Is preferred. Since the in-mold molding method can be performed at a lower pressure than the injection foam molding method, a low-cost mold such as an aluminum mold can be used as the mold.
[0019]
The expansion ratio (density of the base resin / apparent density of the foam) of the above-mentioned polyolefin resin foam is determined by the type of the polyolefin resin as the base resin, the size and weight of the substrate to be stored, the wall thickness of the transport box. Although it is determined according to the like, it is usually 3 to 50 times, preferably 4 to 40 times. If the expansion ratio is too small, the substrate cannot be sufficiently protected, and the lightness inherent to the foam may be lost. On the other hand, if the expansion ratio is too large, the strength tends to be insufficient, and the wall thickness must be increased in order to compensate for this. As a result, there is a possibility that a large transport box having an unnecessarily thick wall may be obtained. If the expansion ratio is too large, the transport box itself tends to be deformed, and the substrate housed inside may be damaged.
[0020]
When the transport box 1 of the present invention is made of a polyolefin resin foam, the surface of the surface in contact with the substrate (preferably the entire surface of the polyolefin resin foam) is formed in a skin structure having an apparent density larger than the inside of the wall. Is desirable. For example, by increasing the heating time or performing post-heating during in-mold molding, only the surface that is in contact with the inner surface of the mold can be formed into a skin structure.
[0021]
In this case, the apparent density of the skin structure (the apparent density of a portion from the surface to a depth of 1 mm) is one more than the apparent density of the inside (the apparent density obtained by cutting off the portion at a depth of 1 mm from the surface and measuring the remaining inside). It is preferable that the size is increased by a factor of at least 1, preferably at least 1.3, more preferably from 1.5 to 3.5. The surfaces of the lid 3 and the bottom 4 are also preferably made of a polyolefin resin foam having a similar skin structure. Making only the surface into such a skin structure is advantageous in terms of preventing dust generation and improving strength.
[0022]
Next, a case where the main body 2, the lid 3, and the bottom 4 of the present invention are formed of a foam made of a base resin mainly composed of a thermoplastic polyester resin will be described.
[0023]
As the polyester resin used in the in-mold molding method, to prevent the brittleness due to excessive crystallization at the time of heat molding to reduce the abrasion resistance, and further to prevent the thermal fusion property of the expanded particles from decreasing. It is preferable to use one having a suppressed crystallization speed. Specifically, a polyester-based resin having a crystallization peak temperature of 130 to 180 ° C is preferable, one having 132 to 175 ° C is more preferable, and one having 135 to 170 ° C is further preferable. If the crystallization peak temperature is within this range, since there is no excessive crystallization at the time of heat molding, it is possible to obtain expanded particles having excellent fusion bonding property at the time of heat molding, and to obtain a finally obtained foam. Has excellent abrasion resistance and mechanical strength.
In general, a polyester-based resin having a higher crystallization peak temperature requires a larger amount of heat to promote crystallization, and has a characteristic that the crystallization speed is lower.
[0024]
If the crystallization peak temperature is lower than 130 ° C., crystallization may progress too much during heat molding, and the abrasion resistance and heat-fusibility of the expanded particles may be reduced. There is a possibility that the temperature range of the heat molding in which the shrinkage of the body is prevented and a foam having a good appearance can be obtained is narrowed.
[0025]
The crystallization peak temperature of the thermoplastic polyester-based resin is determined by a differential scanning calorimeter (DSC) according to the measurement method described in Japanese Industrial Standards JIS K7121 (1987). (The peak temperature at which crystallization occurs when the temperature is raised). Specifically, a predetermined amount of a thermoplastic polynistel-based resin as a measurement sample is filled in a DSC measuring device, and the crystallization peak temperature is measured while heating at a rate of 10 ° C./min. .
[0026]
The thermoplastic polyester-based resin satisfying such properties is not limited to this. For example, at least one component selected from the group consisting of isophthalic acid and cyclohexanedimethanol in a total amount of 0.1% is preferred. One containing 5 to 10% by weight is exemplified.
[0027]
That is, as a dicarboxylic acid, the following formula (1)
[0028]
Embedded image

In the case of using isophthalic acid represented by, or using cyclohexane dimethanol as a diol, or using both in combination, and when using either one alone, the content ratio of that alone, and both When used together, there may be mentioned those whose total content is in the range of 0.5 to 10% by weight of all the components.
[0029]
Incidentally, the content ratio of isophthalic acid and / or cyclohexanedimethanol is particularly preferably 0 even within the above-mentioned range in consideration of the production of good expanded particles and good expanded molded articles in consideration of the balance of the above properties. It is preferably about 9.6 to 9.5% by weight, and more preferably about 0.7 to 9% by weight. Among the above, as the cyclohexane dimethanol, basically, the following formula (2) in which two methanol moieties are respectively substituted at the 1-position and the 4-position of the cyclohexane ring.
[0030]
Embedded image

1,4-cyclohexanedimethanol represented by the following formula is used. However, isomers in which two methanol moieties are substituted at other positions of the cyclohexane ring can be used in combination if the amount is small. Among the other components constituting the thermoplastic polyester resin together with the isophthalic acid and cyclohexanedimethanol, examples of the dicarboxylic acid include terephthalic acid and phthalic acid.
[0031]
As the diol component, for example, ethylene glycol, α-butylene glycol (1,2-butanediol), β-butylene glycol (1,3-butanediol), tetramethylene glycol (1,4-butanediol), 2,2 3-butylene glycol (2,3-butanediol), neopentyl glycol and the like.
[0032]
In addition, the raw material of the thermoplastic polyester resin may include, in addition to the above components, for example, as an acid component, a trivalent or higher polyvalent such as a tricarboxylic acid such as trimellitic acid or a tetracarboxylic acid such as pyromellitic acid. Carboxylic acid or its anhydride, or alcohol component, such as triols such as glycerin, tetraols such as pentaerythritol, trivalent or more polyhydric alcohols and the like, the crystallinity of the thermoplastic polyester resin and A small amount may be contained within a range that does not affect the crystallization speed and the like.
[0033]
The thermoplastic polyester-based resin contains a raw material containing the above components in a predetermined ratio, that is, isophthalic acid and / or cyclohexane dimethanol as described above in a total amount of 0.5 to 10% by weight, It is produced by a polycondensation reaction as in the conventional case. Further, the thermoplastic polyester-based resin is obtained by mixing two or more thermoplastic polyester-based resins having different contents of isophthalic acid and / or cyclohexanedimethanol with respect to the content of isophthalic acid and / or cyclohexanedimethanol in all the components. Can be also produced by blending so that the total amount thereof is in the range of 0.5 to 10% by weight, and melt-mixing under heating using, for example, an extruder.
[0034]
By changing the mixing ratio of two or more thermoplastic polyester-based resins having different contents of isophthalic acid and / or cyclohexane dimethanol in the production stage of the expanded particles, the content ratio of both components in the manufactured pre-expanded particles Can be adjusted. For this reason, adjusting the content ratio of both components at the stage of manufacturing the expanded particles can simplify the adjustment work and change the specifications, as compared with adjusting the content ratio of both components at the resin synthesis stage. There is an advantage that it becomes possible to respond flexibly to
[0035]
In addition, the method of adjusting the content ratio of both components at the stage of producing the expanded particles is, for example, by using a material recovered and recycled from a used PET bottle or the like as one kind of thermoplastic polyester resin to be blended. In addition, there is an advantage that it is possible to effectively reuse resources and reduce waste, and to reduce the cost of pre-expanded particles. In the above-mentioned method, sufficient melting and mixing are performed under heating so that each resin is alloyed by a transesterification reaction between two or more thermoplastic polyester-based resins to form a uniform thermoplastic polyester-based resin. Is preferred.
[0036]
To the base resin constituting the polyester resin, various additives such as an antistatic agent, a bubble regulator, a flame retardant, a flame retardant auxiliary, and an inorganic filler can be added in necessary amounts as necessary. .
[0037]
The polyester resin foam constituting the transport box of the present invention can be manufactured by a conventionally known method. However, it is preferable to produce by a so-called in-mold molding method. That is, resin particles are formed from a polyester resin using an extruder, the resin particles are foamed to form foamed particles, the foamed particles are filled in a mold, heated to a predetermined temperature, and then cooled. It is preferable to manufacture by doing.
[0038]
The expansion ratio of the polyester resin foam (density of the base resin 基材 apparent density of the foam) is determined by the type of the polyester resin as the base resin, the size and weight of the substrate to be stored, the wall thickness of the box, and the like. It is usually determined 3 to 50 times (apparent density 0.45 to 0.027 g / cm ³ ) Is preferable, and 5 to 30 times (apparent density 0.27 to 0.045 g / cm) ³ ) Is more preferably 15 to 25 times (apparent density 0.09 to 0.054 g / cm). ³ Is more preferred. When the expansion ratio is less than 3 times, there is a possibility that the lightness characteristic of the foam is lost, and when it exceeds 50 times, the mechanical strength may be too low.
[0039]
The lid 3 and the bottom 4 that constitute the transport box 1 of the present invention are detachably formed on the main body 2. That is, the transport box 1 can be easily disassembled for each component. Therefore, when the substrate is not accommodated, the substrate can be disassembled and stored, so that the storage cost and the transportation cost are lower than those of the conventional transport box. Further, even if any member is damaged, only the member can be replaced, so that the replacement cost can be reduced. Further, the production of a large-sized mold is inexpensive and easy to mold, and each component member is not damaged at the time of mold release after molding.
[0040]
In the present invention, as described above, for example, as shown in FIG. 1, the outside of the upper end of the main body 2 is stepped to form the lid 3 detachably attached to the main body 2. A step 8 having an inner peripheral surface corresponding to the shape of the outer peripheral surface of the inner step 7 formed in the step shape is formed inside the lid 3 (FIG. 2). What is necessary is just to attach the cover body part 3 so that the step part 8 may fit.
FIG. 2A is a front view of the lid 3, and FIG. 2B is a rear view.
[0041]
In order to form the bottom body portion 4 detachably from the main body portion 2, similarly to the above-described lid body portion 3, for example, as shown in FIG. 1, the outside of the lower end portion of the main body portion 2 is formed in a step shape. A step 10 having an inner peripheral surface corresponding to the shape of the outer peripheral surface of the inner step 9 formed in a step shape is formed inside the bottom body portion 4, and the step 9 and the step 10 are fitted. What is necessary is just to attach the bottom part 4 so that it may fit.
[0042]
It is preferable that the lid 3 and the bottom 4 of the present invention have the same shape. When the lid 3 and the bottom 4 have the same shape, only one type of die is required for manufacturing the lid 3 and the bottom 4, which is efficient. In addition, it is convenient because the lid 3 and the bottom 4 are not erroneously selected. Furthermore, when one of the lid 3 and the bottom 4 is damaged, there is no mistake in refilling a member different from the damaged member.
[0043]
The fitting between the main body 2 and the lid 3 (including the fitting between the main body 2 and the bottom 4) is sufficient because the frictional force between the foams is large. However, when performing the gas replacement or when it is desired to strengthen the fitting, the area of the fitting portion may be increased, for example, by forming a portion where both are fitted into a corrugated shape.
[0044]
As shown in FIG. 1, a space for accommodating a plurality of substrates P is formed inside the main body 2 of the present invention, and a pair of opposing surfaces on the inner surface of the main body are provided with a substrate support. 6a and 6b (the grooves 6a, 6b, etc. are collectively referred to as grooves 6). Since the main body 2 is formed in such a manner, a plurality of internal parts of the main body 2 are held by inserting the opposing edges of the substrate P into the opposing grooves 6a and 6b to hold the substrate P. The substrate P can be accommodated without damage.
[0045]
When the groove 6 is formed, the groove 6c for supporting the substrate can be formed not only on the inner surface of the main body 2 but also on the inner wall surface of the lid 3, and also on the inner wall surface of the bottom body 4. The groove 6d for supporting the substrate can be formed. When the groove 6 is configured as described above, the holding property of the substrate P is further improved.
[0046]
Further, it is normal that no groove is formed on the other pair of opposing side surfaces of the inner surface of the main body portion 2. However, a groove may be formed to accommodate a substrate of another size.
[0047]
It is preferable that the groove 6 for supporting the substrate is formed at the same time as the in-mold forming. However, an insertion member having the groove 6 may be attached and arranged. The groove 6a and the groove 6b are more likely to be damaged than others, so that it is convenient to be replaceable. As such an insertion member, those having a shape described in JP-A-7-257681 or JP-A-8-301354 (what is referred to as a "grooved insertion member" in JP-A-7-257681) In Japanese Patent Application Laid-Open No. 8-301354, those described as "buffers 4a and 4b" are preferably used.
[0048]
The groove 6 is formed so as to have a depth and a width in which an edge portion of the substrate P can be inserted, and is set so as to have some margin when the substrate P is inserted. Although the number of grooves can be set arbitrarily, it is preferable to set the number of grooves to 15 to 50 in consideration of the fact that the substrate can be easily transported with the substrate inserted.
[0049]
When the inside of the transport box of the present invention is replaced with an inert gas, a gas inlet is provided at an appropriate place of the main body 2 or the lid 3.
[0050]
When the transport box of the present invention accommodates a glass substrate or a completed panel of a liquid crystal cell on which a TFT (thin film transistor) has been formed, at least a portion of the transport box that may or may be in contact with the substrate (preferably a transport box). The entire box) has a volume resistivity of 10 by a method such as foaming a synthetic resin containing a conductive polymer or an antistatic substance in an amount of several percent to several tens percent. ³ -10 ¹² It is desirable to use a synthetic resin foam of Ω · cm. This provides the required antistatic properties.
[0051]
In the transport box 1 of the present invention, the main body 2 is formed so as to be disassembled into two members 11a and 11b as shown in FIG. 3A, and a horizontal cross section of the two members 11a and 11b. However, as shown in FIG. However, the present invention is not limited to the configuration in which the main body 2 is composed of two members. For example, the main body 2 may be two-tiered by using two more members having the same shape as the two members 11a and 11b. .
FIG. 3A is a perspective view of a state where the main body 2 is disassembled, and FIG. 3B is a plan view of the member 11a in FIG. 3A.
[0052]
As described above, the transport box 1 of the present invention has the lid 3 and the bottom 4 formed detachably on the main body 2, and the main body 2 further includes a U-shaped member 11 a. Since it can be disassembled into the member 11b, it can be stored more compactly, and the storage space is further reduced. Further, when a part of the main body 2 is damaged, not all of the main body but only the damaged member may be replaced, so that there is little waste.
[0053]
Furthermore, the members 11a and 11b having a U-shape (hereinafter, these are collectively referred to as the members 11) are advantageous in that they can be easily formed by heating and the occurrence rate of defective products is small. That is, since the wall of the main body 2 is formed vertically or almost vertically, the larger the main body 2 is, the more difficult it is to release the mold, and the more likely it is to be broken at the time of release. Therefore, as the size of the main body 2 increases, it becomes more difficult to mold it as a single member, and the occurrence rate of defective products increases. On the other hand, the member 11 having a U-shaped horizontal cross section is easy to release and has a low incidence of defective products.
[0054]
The members 11 each having a U-shaped horizontal cross section preferably have the same shape. When all the members 11 have the same shape, only one type of mold is required for manufacturing the member 11, which is efficient. Further, when assembling the main body 2, the member 11a and the member 11b are not erroneously selected, which is convenient. Furthermore, when one of the members 11 is damaged, there is no mistake in refilling a member different from the damaged member.
[0055]
It is preferable that the main body 2 is formed so as to be disassembled into three or more members. Further, it is preferable that at least two of the three or more members have a U-shaped horizontal cross section, and at least one of the members has a U-shaped horizontal cross section. More specifically, for example, as shown in FIG. 4, the main body 2 preferably includes a member 11a and a member 11b whose two horizontal cross sections have a U shape and a member 11c whose horizontal cross section has a U shape.
[0056]
In order to attach the member 11c having a rectangular cross section in a horizontal shape to a member formed by joining the members 11a and 11b in the horizontal direction from above, for example, the members 11a and 11b are joined in the horizontal direction. A step 14 having an inner peripheral surface corresponding to the shape of the outer peripheral surface of the inner step 13 formed in the step is formed inside the member 11c. The step 13 and the step 14 may be fitted.
[0057]
The main body 2 thus configured is attached with a member 11c having a U-shaped horizontal cross section in a state where members 11a and 11b having a U-shaped flat cross section are joined to each other in the horizontal direction. Therefore, the member 11a, the member 11b, and the member 11c are integrated to form the main body 2. Therefore, the main body 2 does not collapse even when the lid 3 is removed. Further, when the member 11c is removed, the member 11a and the member 11b can be disassembled, so that they can be stored compactly.
[0058]
However, the present invention is not limited to attaching the member 11c from above the members 11a and 11b, but may be attached from below. Further, another member whose horizontal cross section has a square shape may be fitted and attached from above and below the member 11a and the member 11b. In this case, it is preferable that the member 11c and the other members attached from below have the same shape.
[0059]
As shown in FIG. 4, the main body 2 of the present invention can join the U-shaped opened tip 15a of the member 11a to the U-shaped opened tip 15b of the member 11b. The U-shaped open tip 16a of the member 11a can be joined to the U-shaped open tip 16b of the member 11b, and the joining forms the main body 2 or a part of the main body 2. be able to.
In the joining shown in FIG. 4, a tenon having an L-shaped cross section is formed in a corresponding shape along the vertical direction of the tip 15a and the tip 15b, and the members 11a and 11b are joined in the horizontal direction. ing.
[0060]
In the present invention, when the members 11a and 11b are joined in the horizontal direction in this manner, as shown in FIG. 3, a convex portion or a ridge 17a is formed along the vertical direction of the distal end portion 15a, and the other distal end is formed. A concave portion or a concave line 17b that can fit with the convex portion or the convex line 17a is formed along the vertical direction of the portion 15b, and a convex portion or the convex line 18b is formed along the vertical direction of the tip portion 16b. It is preferable that a concave portion or a concave line 18a that can be fitted with the convex portion or the convex line 18b is formed along the vertical direction of the tip portion 15a.
[0061]
As described above, when the members 11a and 11b are joined in the horizontal direction by fitting the open ends of the U-shape to each other, the member 11a and the member 11b are less likely to be shifted from each other. The shape stability of No. 2 is further improved, and the entry of dust can be effectively prevented.
[0062]
In the present specification, the term “the convex portion or the convex line is formed” means that the convex line may be provided continuously along the vertical direction of one end portion of the U-shape to be joined. This means that the parts may be provided discontinuously. Further, the fact that the concave portion or the concave streak is formed means that the concave streak may be provided continuously as long as it can be fitted with the convex portion or the convex streak, and the convex portion may be discontinuously provided. It means that it may be provided.
[0063]
In the transport box 1 according to the present invention, it is preferable that the horizontal periphery of the assembled main body 2 is fixed with a cord (not shown). With this configuration, the shape stability of the main body 2 is enhanced, and it is possible to easily prevent the main body 2 from collapsing and falling apart when the lid 3 is removed.
[0064]
Further, in the transport box 1 of the present invention, it is preferable that a plurality of substrates are accommodated inside the transport box 1 and the periphery thereof in the up-down direction is fixed with a string-like material (not shown). With such a configuration, it is possible to prevent the bottoming out in a state where the substrate is housed.
[0065]
Further, when transporting (for example, exporting) to a distant place, it is preferable to package the entire transport box containing the substrates with a moisture-proof packaging material such as a polyolefin film or an aluminum laminate film. At the time of packaging, a moisture absorbent such as silica gel can be put inside.
[0066]
【The invention's effect】
The substrate transport box of the present invention is composed of a bottomless box body, a lid, and a bottom, which are detachably formed, so that storage costs and return costs are reduced by the conventional transport costs. It is cheaper than a box. Further, even if any of the constituent members is damaged, only the member can be replaced, so that the replacement cost can be reduced. Further, when the size is increased, it is easy to form and mold the mold, and each component is not damaged at the time of mold release after molding.
[0067]
In the present invention, the main body is formed so as to be disassembled into two or more members, and at least two of the two or more members have a U-shaped horizontal cross section, so that they can be stored more compactly. Storage space is further reduced. Further, when a part of the main body 2 is damaged, not all of the main body but only the damaged member may be replaced, so that there is little waste. Further, even when the main body is made larger, the mold can be easily released and breakage can be prevented, so that the occurrence rate of defective products is smaller.
[0068]
In the present invention, when adopting a configuration in which the horizontal cross section of at least one member constituting the main body has a rectangular shape, two U-shaped members are joined in the horizontal direction and combined in a rectangular shape, By fitting a member having a square cross section in a horizontal shape from above, it is possible to prevent the main body from falling apart when the lid is removed.
[0069]
In the present invention, if the members having the U-shaped horizontal cross section have the same shape, only one type of mold is required for manufacturing at least two members constituting the main body. It is efficient. Further, it is convenient that the member 1 is not erroneously selected when assembling the main body.
[0070]
In the present invention, when two members constituting the main body are joined in the horizontal direction, a convex portion or a ridge is formed along the vertical direction of one end of the U-shape to be joined, and the other end is formed. If a configuration in which a concave portion or a concave line that can be fitted with the convex portion or the convex line is formed along the vertical direction, the shape stability of the main body portion is further increased because displacement between members is less likely to occur, Intrusion of garbage can be effectively prevented.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a configuration example of a substrate transport box according to the present invention.
2A is a front view of a lid (bottom), and FIG. 2B is a plan view.
3A is a perspective view of a main body, and FIG. 3B is a plan view of a member 11a in FIG. 3A.
FIG. 4 is a perspective view showing another embodiment of the main body.
[Explanation of symbols]
1 Transport box
2 Body
3 Lid
4 bottom body
6a, 6b groove
11a, 11b, 11c members
15a, 15b Tip
17a, 18b ridge
17b, 18a Concave strip
P substrate

Claims (6)

It is composed of a cylindrical bottomless box main body, a lid and a bottom, and the lid and the bottom are detachably formed on the main body, and the inside of the box main is A space for accommodating a plurality of substrates is formed, and a pair of opposing surfaces on the inner surface of the main body are formed with grooves for supporting the substrate, and the main body, the lid and Each of the bottom portions is a substrate transfer box formed of a synthetic resin foam molded body, and the main body portion is formed so as to be disassembled into two or more members. A substrate transport box, wherein a horizontal cross section of at least two members has a U-shape. The main body is formed so that it can be disassembled into three or more members. At least two of the three or more members have a U-shaped horizontal cross-section, and at least one member has a horizontal cross-section. The box for transporting substrates according to claim 1, wherein the box has a rectangular shape. 3. The substrate transport box according to claim 1, wherein the members having a U-shaped horizontal cross section have the same shape. The main body includes a structure in which two U-shaped opened ends of a member having a U-shaped horizontal cross section are vertically joined to each other, and a vertical end of one of the joined U-shaped ends is provided. A convex portion or a convex line is formed along the direction, and a concave portion or a concave line which can be fitted with the convex portion or the convex line is formed along a vertical direction of the other end portion. 4. The substrate transport box according to any one of 1 to 3. The substrate transport box according to any one of claims 1 to 4, wherein a horizontal periphery of the main body of the box is fixed by a string. The box for transporting substrates according to any one of claims 1 to 5, wherein a plurality of substrates are accommodated in the box, and the periphery of the box in the vertical direction is fixed with a string-like object.

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