JP3982651B2 - Synthetic resin housing - Google Patents

Synthetic resin housing Download PDF

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Publication number
JP3982651B2
JP3982651B2 JP05974698A JP5974698A JP3982651B2 JP 3982651 B2 JP3982651 B2 JP 3982651B2 JP 05974698 A JP05974698 A JP 05974698A JP 5974698 A JP5974698 A JP 5974698A JP 3982651 B2 JP3982651 B2 JP 3982651B2
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lateral
rib
depth
synthetic resin
concave
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JPH11255225A (en
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和久 中井
剛美 渋谷
貴義 工藤
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Dai Nippon Printing Co Ltd
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Dai Nippon Printing Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2501/00—Containers having bodies formed in one piece
    • B65D2501/0009—Bottles or similar containers with necks or like restricted apertures designed for pouring contents
    • B65D2501/0018—Ribs
    • B65D2501/0027—Hollow longitudinal ribs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2501/00—Containers having bodies formed in one piece
    • B65D2501/0009—Bottles or similar containers with necks or like restricted apertures designed for pouring contents
    • B65D2501/0018—Ribs
    • B65D2501/0036—Hollow circonferential ribs

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  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、二軸延伸ブロー成形により形成された合成樹脂製壜体の技術分野に属し、特に、例えばホットフィルやコールドフィルの液体充填等、幅広い用途に対応可能な耐減圧、耐膨出圧、および耐保持圧等を有する合成樹脂製壜体の技術分野に属するものである。
【０００２】
【従来の技術】
近年、ポリエチレンテレフタレートにより代表される飽和ポリエステル樹脂等を用いて二軸延伸ブロー成形により成形される合成樹脂製壜体は、ジュースやミネラルウォーター等の各種飲料水、調味料、酒類、その他の食品用の収納壜等に広く用いられている。
【０００３】
ところで、このような合成樹脂製壜体は、充填される内容物の重量により合成樹脂製壜体の胴部が加圧されたり、あるいは内容物が充填された合成樹脂製壜体を搬送するとき等に外力が加えられたりして、弾性変形してしまうことがある。また、高温の液体を充填するホットフィルにおいては、高温の液体を合成樹脂製壜体に充填して栓をした状態にしておくと、合成樹脂製壜体内の充填物が冷却されて合成樹脂製壜体の内圧が低下して、大気圧により合成樹脂製壜体の胴部が押圧されたり、低温の液体等を合成樹脂製壜体に充填するというコールドフィルにおいては、低温の液体を合成樹脂製壜体に充填して栓をした状態にしておくと、合成樹脂製壜体内の充填物が暖められて合成樹脂製壜体の内圧が上昇して、合成樹脂製壜体の胴部が加圧されたりして、同様に合成樹脂製壜体の胴部が弾性変形してしまう。
【０００４】
そこで、従来、例えば特開平６ー１２７５４３号公報に開示されているように、合成樹脂製壜体の周方向に延びる凹溝からなる補強のための数条の横方向リブを壜体胴部の各面に設けたり、凹凸部からなる補強パネルを壜体胴部の各面に設けて、胴体の強度を増大して前述のような合成樹脂製壜体の胴部の弾性変形を抑制するようにしている。
【０００５】
また、このような合成樹脂製壜体の胴部の弾性変形を防止するために、例えば実開平５ー９４１１２号公報に開示されているように、周方向全周にわたって延びる凹溝からなる補強のための数条の横方向リブ設けるとともに、このような周方向の補強リブと凹凸部からなる補強パネルとを組み合わせたものもある。
【０００６】
【発明が解決しようとする課題】
しかしながら、前述の公報に開示されている合成樹脂製壜体は、いずれも補強リブや補強パネルにより、合成樹脂製壜体の強度は向上するが、その反面柔軟性があまりないため、これらの補強リブや補強パネルが、側面方向に加えられる外力、ホットフィルにおける合成樹脂製壜体内の減圧、コールドフィルにおける合成樹脂製壜体内の加圧、あるいは合成樹脂製壜体内の充填物の自重による加圧等に基づくある一定以上の押し圧に対して潰れて復元しない変形をして元に復元しなくなる場合がある。また、一般に合成樹脂製壜体を保持する場合、矩形状の合成樹脂製壜体の長辺側の比較的広い平面部を保持するようになるが、この比較的広い平面部に保持圧が加えられるようになるため、この平面部に形成されている補強リブ等が潰れて、同様に復元しない場合がある。更に、補強リブと補強パネルとが互いに離隔して不連続に形成されているため、合成樹脂製壜体の側面方向に対して押し圧が加えられたとき、補強リブと補強パネルとの境は、その境のエッジ部に集中してエッジ力が生じるため変形しやすく、しかもこの変形後に復元しない場合もある。
【０００７】
このように合成樹脂製壜体が潰れて復元しない変形を起こしてしまうと、合成樹脂製壜体の強度が低下してしまうばかりでなく、合成樹脂製壜体の外観が損なわれて、商品価値が著しく低下してしまう。
【０００８】
本発明は、このような問題に鑑みてなされたものであって、その目的は、強度を増大させながら、しかも補強リブや補強パネル等の潰れ変形を防止することのできる合成樹脂製壜体を提供することである。
【０００９】
【課題を解決するための手段】
前述の課題を解決するために、請求項１の発明は、口部と、この口部に連続する肩部と、この肩部に連続する胴部と、この胴部に連続する底部とからなり、これらの各部が合成樹脂によって一体に成形された合成樹脂製壜体において、前記胴部の上部に、周方向に延びる凹溝からなる所定数の横方向リブが形成されているとともに、この横方向リブが形成される領域の一部分の領域に、前記横方向リブの凹溝に連続する所定形状の凹部からなる第１の補強パネルが形成されており、
この第１の補強パネルの凹部の深さがこの凹部の縁から中央に向かって徐々にかつ連続して深くなるとともに、前記凹部の深さが、この凹部の縁付近では前記横方向リブの凹溝の深さより浅く設定されているとともに、前記凹部の中央部付近では前記横方向リブの凹溝の深さより深く設定されており、前記胴部の下部に、上下方向に延びる上部側凹凸条部と、この上部側凹凸条部の下に設けられた上下方向に延びる下部側凹凸条部と、これらの上、下部側凹凸条部の間に設けられた周方向に延びる凹部とからなる第２の補強パネルが形成されていることを特徴としている。
【００１０】
また請求項２の発明は、前記胴部の上部と下部との間に第２の横方向リブが形成されているとともに、この第２の横方向リブは、上下の傾斜側面部とこれらの傾斜側面部の間に位置する底部とからなる、断面が胴部の外面から深くなるにしたがって狭くなる台形状に形成されており、前記第２の横方向リブの一部に、前記底部の幅が前記第２の横方向リブの他部における底部の幅より広くかつ周方向に延びる拡幅部からなる補強リブ部が形成されているとともに、この補強リブ部の拡幅部はその周方向両端から中央に向かって徐々に広くなって中央で最大となるように設定されていることを特徴としている。
【００１１】
更に請求項３の発明は、口部と、この口部に連続する肩部と、この肩部に連続する胴部と、この胴部に連続する底部とからなり、これらの各部が合成樹脂によって一体に成形された合成樹脂製壜体において、前記胴部の上部に、周方向に延びる凹溝からなる所定数の横方向リブが形成されているとともに、この横方向リブが形成される領域の一部分の領域に、前記横方向リブの凹溝に連続する所定形状の凹部からなる補強パネルが形成されており、この補強パネルの凹部の深さがこの凹部の縁から中央に向かって徐々にかつ連続して深くなるとともに、前記凹部の深さが、この凹部の縁付近では前記横方向リブの凹溝の深さより浅く設定されているとともに、前記凹部の中央部付近では前記横方向リブの凹溝の深さより深く設定されており、前記胴部の上部と下部との間に第２の横方向リブが形成されているとともに、この第２の横方向リブは、上下の傾斜側面部とこれらの傾斜側面部の間に位置する底部とからなる、断面が胴部の外面から深くなるにしたがって狭くなる台形状に形成されており、前記第２の横方向リブの一部に、前記底部の幅が前記第２の横方向リブの他部における底部の幅より広くかつ周方向に延びる拡幅部からなる補強リブ部が形成されているとともに、この補強リブ部の拡幅部はその周方向両端から中央に向かって徐々に広くなって中央で最大となるように設定されていることを特徴としている。
【００１２】
更に請求項４および請求項１２の発明は、前記横方向リブは複数形成されており、それらの複数の横方向リブのうち、一部の横方向リブが、前記補強パネルの凹部の深さが前記横方向リブの凹溝の深さより浅い領域に形成されていて、この領域の部分の横方向リブの深さは、前記補強パネルの凹部の深さが深くなるにしたがって徐々に浅くなっており、前記複数の横方向リブのうち、他の横方向リブが、前記補強パネルの凹部の深さが前記横方向リブの凹溝の深さより浅い領域および前記補強パネルの凹部の深さが前記横方向リブの凹溝の深さより深い領域にまたがって形成されていて、前記他の横方向リブが、前記補強パネルの凹部の深さが前記横方向リブの凹溝の深さより浅い領域では形成されるが、前記補強パネルの凹部の深さが前記横方向リブの凹溝の深さより深い領域では消滅することを特徴としている。
【００１３】
更に請求項５の発明は、口部と、この口部に連続する肩部と、この肩部に連続する胴部と、この胴部に連続する底部とからなり、これらの各部が合成樹脂によって一体に成形された合成樹脂製壜体において、前記胴部の上部と下部との間に第２の横方向リブが形成されているとともに、この第２の横方向リブは、上下の傾斜側面部とこれらの傾斜側面部の間に位置する底部とからなる、断面が胴部の外面から深くなるにしたがって狭くなる台形状に形成されており、前記第２の横方向リブの一部に、前記底部の幅が前記第２の横方向リブの他部における底部の幅より広くかつ周方向に延びる拡幅部からなる補強リブ部が形成されているとともに、この補強リブ部の拡幅部はその周方向両端から中央に向かって徐々に広くなって中央で最大となるように設定されており、前記胴部の下部に、上下方向に延びる上部側凹凸条部と、この上部側凹凸条部の下に下部側凹凸条部と、これらの上、下部側凹凸条部の間に周方向に延びる凹部とからなる補強パネルが形成されていることを特徴としている。
【００１４】
更に請求項６の発明は、前記上部側凹凸条部と前記下部側凹凸条部とは同数かつ上下に整列されて形成されていることを特徴としている。
更に請求項７の発明は、口部と、この口部に連続する肩部と、この肩部に連続する胴部と、この胴部に連続する底部とからなり、これらの各部が合成樹脂によって一体に成形された合成樹脂製壜体において、前記胴部の上部に、周方向に延びる凹溝からなる所定数の横方向リブが形成されているとともに、この横方向リブの一部分において前記凹溝が消滅した不連続部からなる柔軟性付与部が形成されており、前記胴部の下部に、上下方向に延びる上部側凹凸条部と、この上部側凹凸条部の下に下部側凹凸条部と、これらの上、下部側凹凸条部の間に周方向に延びる凹部が形成されていることを特徴としている。
【００１５】
更に請求項８の発明は、前記胴部の上部と下部との間に第２の横方向リブが形成されているとともに、この第２の横方向リブは、上下の傾斜側面部とこれらの傾斜側面部の間に位置する底部とからなる、断面が胴部の外面から深くなるにしたがって狭くなる台形状に形成されており、前記第２の横方向リブの一部に、前記底部の幅が前記第２の横方向リブの他部における底部の幅より広くかつ周方向に延びる拡幅部からなる補強リブ部が形成されているとともに、この補強リブ部の拡幅部はその周方向両端から中央に向かって徐々に広くなって中央で最大となるように設定されていることを特徴としている。
【００１６】
更に請求項９の発明は、口部と、この口部に連続する肩部と、この肩部に連続する胴部と、この胴部に連続する底部とからなり、これらの各部が合成樹脂によって一体に成形された合成樹脂製壜体において、前記胴部の上部に、周方向に延びる凹溝からなる所定数の横方向リブが形成されているとともに、この横方向リブの一部分において前記凹溝が消滅した不連続部からなる柔軟性付与部が形成されており、前記胴部の上部と下部との間に第２の横方向リブが形成されているとともに、この第２の横方向リブは、上下の傾斜側面部とこれらの傾斜側面部の間に位置する底部とからなる、断面が胴部の外面から深くなるにしたがって狭くなる台形状に形成されており、前記第２の横方向リブの一部に、前記底部の幅が前記第２の横方向リブの他部における底部の幅より広くかつ周方向に延びる拡幅部からなる補強リブ部が形成されているとともに、この補強リブ部の拡幅部はその周方向両端から中央に向かって徐々に広くなって中央で最大となるように設定されていることを特徴としている。
【００１７】
更に請求項１０の発明は、口部と、この口部に連続する肩部と、この肩部に連続する横断面矩形状の胴部と、この胴部に連続する底部とからなり、これらの各部が合成樹脂によって一体に成形された合成樹脂製壜体において、前記矩形状の胴部の長辺側および短辺側の上部に、周方向に延びる凹溝からなる所定数の横方向リブが形成されているとともに、この横方向リブが形成される長辺側の領域に、前記横方向リブの凹溝に連続する所定形状の凹部からなる補強パネルが形成されており、この補強パネルの凹部の深さがこの凹部の縁から中央に向かって徐々にかつ連続して深くなるとともに、前記凹部の深さが、この凹部の縁付近では前記横方向リブの凹溝の深さより浅く設定されているとともに、前記凹部の中央部付近では前記横方向リブの凹溝の深さより深く設定されており、前記胴部の短辺側の上部に形成されている前記横方向リブの一部分において前記凹溝が消滅した不連続部からなる柔軟性付与部が形成されていることを特徴としている。
【００１８】
更に請求項１１の発明は、前記胴部の長辺側および短辺側の少なくとも一方の側の下部に、上下方向に延びる上部側凹凸条部と、この上部側凹凸条部の下に下部側凹凸条部と、これらの上、下部側凹凸条部の間に周方向に延びる凹部とからなる第２の補強パネルが形成されていることを特徴としている。
【００１９】
更に請求項１２の発明は、前記横方向リブは複数形成されており、それらの複数の横方向リブのうち、一部の横方向リブは、前記補強パネルの凹部の深さが前記横方向リブの凹溝の深さより浅い領域に形成されていて、この領域の部分の横方向リブの深さは、前記補強パネルの凹部の深さが深くなるにしたがって徐々に浅くなっており、前記複数の横方向リブのうち、他の横方向リブは、前記補強パネルの凹部の深さが前記横方向リブの凹溝の深さより浅い領域および前記補強パネルの凹部の深さが前記横方向リブの凹溝の深さより深い領域にまたがって形成されていて、前記他の横方向リブが、前記補強パネルの凹部の深さが前記横方向リブの凹溝の深さより浅い領域では形成されるが、前記補強パネルの凹部の深さが前記横方向リブの凹溝の深さより深い領域では消滅することを特徴としている。
【００２０】
更に請求項１３の発明は、前記胴部の長辺側および短辺側の少なくとも一方の側の上部と下部との間に、第２の横方向リブが形成されているとともに、この第２の横方向リブは、上下の傾斜側面部とこれらの傾斜側面部の間に位置する底部とからなる、断面が胴部の外面から深くなるにしたがって狭くなる台形状に形成されており、前記第２の横方向リブの一部に、前記底部の幅が前記第２の横方向リブの他部における底部の幅より広くかつ周方向に延びる拡幅部からなる補強リブ部が形成されているとともに、この補強リブ部の拡幅部はその周方向両端から中央に向かって徐々に広くなって中央で最大となるように設定されていることを特徴としている。
【００２１】
更に請求項１４の発明は、前記横方向リブの凹溝に連続する凹部からなる補強パネルが、円形状、楕円形、長円形状、あるいは菱形形状に形成されていることを特徴している。
更に請求項１５の発明は、前記補強リブ部の拡幅部が、円形状、楕円形、長円形状、あるいは菱形形状に形成されていることを特徴としている。
【００２２】
【作用】
このように構成された本発明の合成樹脂製壜体においては、周方向に延びる横方向リブが形成される領域の一部分の領域に、この横方向リブの凹溝に連続する所定形状の凹部からなる補強パネルが形成され、この補強パネルにより、合成樹脂製壜体を保持する際、あるいは合成樹脂製壜体を搬送する際等に、胴部の補強パネル形成部に加えられる垂直な力が分散し集中しなくなる。これにより、胴部の補強パネル形成部に加えられる力が緩和されるので、このような力が加えられて胴部が変形しても、力が除去されると胴部は元に復元するようになる。したがって、このような力による胴部の復元しないような潰れ変形が防止される。特に、補強パネルの凹部により、この凹部内において横方向リブを徐々に消滅するようにすることにより、垂直な力がより効果的に分散するようになる。
【００２３】
また、この補強パネルの凹部が胴部の上部に形成され、しかも凹部の深さが縁から中央に向かって徐々にかつ連続して深くなるように設定されているので、この凹部の凹みに、合成樹脂製壜体を保持する親指等の指が的確にフィットするようになる。これにより、合成樹脂製壜体が持ち易くなり、合成樹脂製壜体内の液体を注ぎ出す際に、安定した状態で液体を注ぎ出すことができるようになる。
【００２４】
更に、本発明においては、上下方向に延びる上部側凹凸条部と下部側凹凸条部との間に周方向に延びる凹部を有する補強パネルが形成されることにより、合成樹脂製壜体の胴部が柔軟性を有するようになる。これにより、ホットフィルあるいはコールドフィルによる充填物の温度変化によって、合成樹脂製壜体の内部が減圧あるいは加圧されて胴部が変形しても、この胴部の柔軟性により、合成樹脂製壜体の内部の減圧あるいは加圧が解消されると、胴部は元に復元するようになり、胴部の潰れ変形が防止される。
【００２５】
このような補強パネルが胴部の下部に形成されることにより、強度が向上するので、充填物の自重に基づく加圧による胴部の膨れの変形が防止されるようになる。
【００２６】
更に、本発明においては、胴部の上部と下部との間に形成される断面台形状の横方向リブに、この横方向リブの一部における底部の幅が横方向リブの他部における底部の幅より広くかつ周方向に延びる拡幅部からなる補強リブ部が形成され、かつこの補強リブ部の拡幅部がその周方向両端から中央に向かって徐々に広くなって中央で最大となるように設定されることにより、胴部のこの横方向リブに加えられる垂直な力が分散し集中しなくなるとともに、補強リブ部の形成部において胴部は柔軟性を有するようになる。これにより、胴部の横方向リブ形成部に加えられる力が緩和されかつ胴部が柔軟になるので、このような力が加えられて胴部が変形しても、力が除去されると胴部は元に復元するようになる。したがって、このような力による胴部の潰れ変形が防止される。
【００２７】
更に、本発明においては、胴部の上部に、周方向に延びる凹溝からなる所定数の横方向リブが形成されているとともに、この横方向リブの一部分において前記凹溝が消滅した不連続部からなる柔軟性付与部が形成されていることにより、胴部の、強度が増大している横方向リブの形成部分が柔軟性を有するようになる。この柔軟性付与部により、この横方向リブ形成部分が柔軟になっているので、このような力が加えられて胴部が変形しても、力が除去されると胴部は元に復元するようになる。したがって、横方向リブにより胴部の強度が増大しても、このような力による胴部の潰れ変形が防止される。
【００２８】
そして、本発明の合成樹脂製壜体においては、これらの補強パネル、横方向リブ、補強リブ部、および柔軟性付与部のいくつかまたは全部を適宜組み合わせることにより、合成樹脂製壜体の強度を増大させながら、しかも合成樹脂製壜体に柔軟性を持たせるとともに、合成樹脂製壜体に加えられる力を分散させることにより、合成樹脂製壜体に加えられる外力や合成樹脂製壜体内の減圧あるいは加圧に基づく、合成樹脂製壜体の復元しないような潰れ変形がより効果的に防止されるようになる。
【００２９】
【発明の実施の形態】
以下、図面を参照して本発明の実施の形態について説明する。
図１は、本発明にかかる合成樹脂製壜体の実施の形態の一例を示す正面図、図２はこの例の左側面図、図３は平面図である。
【００３０】
図１ないし図２に示すように、この例の合成樹脂製壜体１は、口部２と、この口部２から連続する肩部３と、この肩部３から連続する胴部４と、この胴部４から横方向リブ５を介して連続する底部６とからなり、ポリエチレンテレフタレート等のプラスチックを用いてブロー成形によりこれらの部分が一体に形成されている。なお、横方向リブ５は必ずしも必要ではなく、省略して胴部４と底部５とを１つの部分として形成することもできるが、充填物の自重による加圧等の押圧力に対抗する強度を確保するために、設けられることが望ましい。
【００３１】
口部２は従来の合成樹脂製壜体１と同様に円筒状に形成されており、その外周面には、口部２の開口端を閉じるキャップ（不図示）が螺合する雄ねじ７が形成されている。肩部３は全体として逆漏斗状に形成されており、上部８と下部９とからなっている。図１ないし図３に示すように上部８は正１２角形の截頭角錐台状に形成されているとともに、下部９は、後述する４角部が大きく面取りされた矩形状に形成された胴部４の上部１０における各角部とこの肩部３の上部８の正１２角形の角部とを結んだ線に沿って折曲した形状とされている。
【００３２】
更に胴部４は、上部１０と、下部１１と、これら上部１０と下部１１との間で胴部４のほぼ中央に形成された周方向に延びる横方向リブ１２とからなっている。図３に示すように、上部１０および下部１１は、それらの外形の横断面が４角部を比較的大きく面取りされた矩形状に形成されており、その場合上部１０の外形寸法が下部１１の外形寸法よりほんのわずか小さく設定されている。なお、図示しないが横方向リブ１２の外形も、上部１０および下部１１と同様に４角部を比較的大きく面取りされた矩形状に形成されている。また、胴部４の４角部は必ずしも面取りされる必要はなく、所定曲率半径の湾曲部（Ｒ部）とされていてもよい。
【００３３】
上部１０には、この上部１０の正面および背面から左右側面にかけて、それぞれ周方向に延びるＶ字状凹溝からなる、４条の横方向リブ１３,１４,１５,１６が、図１および図２において上下方向に所定間隔を置いて形成されている。なお、これらの横方向リブは上下方向に４条設けることに限定されることなく、上下方向に１条以上の所定の条数、形成することができる。
【００３４】
図４に示すこれらの横方向リブ１３,１４,１５,１６の凹みの幅αは、上部１０の厚みが０.３ｍｍ、上部１０の全周が３７３ｍｍ、および上部１０の上下方向長さが７０ｍｍであるとき、２ｍｍ〜１０ｍｍ程度がよいが、望ましくは３ｍｍ〜７ｍｍがよく、また横方向リブ１３,１４,１５,１６の凹みの深さβは、上部１０の外面から０.５ｍｍ〜１０ｍｍ程度がよいが、望ましくは、０.５ｍｍ〜５ｍｍがよい。これらの数値は、ボトルの材質の特性によるものでテストでの経験値から求められた値であり、ボトルの大きさに関係しない絶対値である。
【００３５】
これらの横方向リブ１３,１４,１５,１６はそれぞれ周方向に延びてはいるが、上部１０の全周にわたっては形成されていなく、図２に示すように矩形状の上部１０の短辺側である左側面の中央部分には形成されていない。すなわち、横方向リブ１３,１４,１５,１６は、それぞれ上部１０の左側面中央部でリブのない不連続部からなる潰れ防止リブ部１７,１８,１９,２０が形成されている。これらの横方向リブ１３,１４,１５,１６の潰れ防止リブ部１７,１８,１９,２０は、上部１０の外形面と同一面にされている（一例として、最上位置にある潰れ防止リブ部１７の場合について図５に示すが、他の潰れ防止リブ部も同様である）。これらの潰れ防止リブ部１７,１８,１９,２０は、図２に示す上部１０の左側面に形成されているだけではなく、図示しないがこの左側面と対向する上部１０の右側面にも形成されている。なお、潰れ防止リブ部１７,１８,１９,２０は、左右側面の少なくとも一方の側面に形成されていればよいが、この例のように両側面に形成されることが、合成樹脂製壜体１に柔軟性をより効果的に発揮させるために望ましい。
これらの潰れ防止リブ部１７,１８,１９,２０の周方向の長さγは、上部１０の全周の長さの５〜５０％がよいが、望ましくは１０〜１５％がよい。
【００３６】
このように、合成樹脂製壜体１の短辺側である左右側面に横方向リブ１３,１４,１５,１６の潰れ防止リブ部１７,１８,１９,２０を設けることにより、横方向リブ１３,１４,１５,１６の補強効果が緩和されるので、合成樹脂製壜体１の上部１０の左右側面は横方向リブ１３,１４,１５,１６を設けて上部１０の全体の強度を大きくしても柔軟性を有する、すなわち大きな復元性を有するようになる。したがって、合成樹脂製壜体１の上部１０の左右側面に押し圧が加えられたとき、この上部１０の側面は従来の壜体に比べて大きく変形しても、押し圧が除かれたときは確実に元に復元するようになる。これにより、合成樹脂製壜体１の左右側面は潰れが発生するまでの変形量が大きくなる、換言すれば簡単には潰れなくなる。こうして、横方向リブ１３,１４,１５,１６の潰れ防止リブ部１７,１８,１９,２０により合成樹脂製壜体１の側面の潰れを確実に防止できるようになり、これらの潰れ防止リブ部１７,１８,１９,２０は本発明の柔軟性付与部を構成している。特に、この例の場合、合成樹脂製壜体１の上部１０の左右側面は、上部１０の比較的幅広の前後面と異なり、パネル面が形成できない極小の面で比較的剛性のある面となっているが、このような極小の面においても、容易に柔軟性のある面を形成できる。しかも、ボトルの成形において、複雑な形状のパネルを形成しなくても、全体として柔軟性を有するボトルを容易に成形することができる。
【００３７】
また、図１に示すように上部１０の長辺側の正面の中央部には、上下方向に長軸となる楕円状の凹部からなる第１補強パネル２１が横方向リブ１３,１４,１５,１６の形成領域の一部を含むように形成されており、これにより、第１補強パネル２１は横方向リブ１３,１４,１５,１６に連続するようになっている。この第１補強パネル２１は、図示しないが上部１０の正面と対向する背面の中央部にも同様に形成されている。なお、第１補強パネル２１は、正面および背面の少なくとも一方の面に形成されていればよいが、この例のように両面に形成されることが、合成樹脂製壜体１に柔軟性をより効果的に発揮させるために望ましい。
【００３８】
図６および図７（ａ）に示すように、この第１補強パネル２１は縦断面および横断面がともに円弧状にまたは楕円弧状に形成されていて、その周縁から中央部にいくにしたがって徐々にかつ連続的に凹んでおり、したがって、第１補強パネル２１の深さδは、第１補強パネル２１の中央部で最も深くなっている。そして、図７（ｂ）に示すように４カ所の横方向リブ１３,１４,１５,１６のうち、最上位置にある横方向リブ１３の形成位置では、この横方向リブ１３の凹溝の深さβの方が第１補強パネル２１の深さδより深くなっており、したがって図１に示すように横方向リブ１３はこの第１補強パネル２１の形成領域でも連続して形成されている。しかし、この第１補強パネル２１の領域内では横方向リブ１３の幅αが第１補強パネル２１の縁から中央に向かって徐々にかつ連続して狭くなっていて、第１補強パネル２１の中央で横方向リブ１３の幅αは最も狭くなっている。換言すれば、横方向リブ１３自体の深さβが第１補強パネル２１の縁から中央に向かって徐々にかつ連続して浅くなっている（図６で示す位置では、横方向リブ１３の深さβは最も浅くなっている）。同様に、最下位置にある横方向リブ１６も第１補強パネル２１の形成領域でも連続して形成され、その幅αも、横方向リブ１３の場合とまったく同じである。
【００３９】
図７（ｃ）に示すように４カ所の横方向リブ１３,１４,１５,１６のうち、上から第２番目の位置にある横方向リブ１４の形成位置では、第１補強パネル２１の深さδの方がこの横方向リブ１４の凹溝の深さβより深くなっている。したがって、図１に示すように第１補強パネル２１の縁から中央に向かって横方向リブ１４の凹溝の深さβが第１補強パネル２１の深さδより深い間は、横方向リブ１４の深さが前述の横方向リブ１３よりは急にかつ連続して浅くなり、第１補強パネル２１の深さδが横方向リブ１４の凹溝の深さβより深い領域になると、横方向リブ１４は完全に消滅している。しかし、この第１補強パネル２１の形成領域では、第１補強パネル２１によって、補強リブが横方向リブ１４に連続して形成されている。同様に、上から第３番目の位置にある横方向リブ１３も第１補強パネル２１の形成領域では、第１補強パネル２１の縁から横方向リブ１３の深さが連続して浅くなり、中央部でこの横方向リブ１３は完全に消滅しているが、この第１補強パネル２１との協働および第１補強パネル２１単独によって、補強リブが横方向リブ１３に連続して形成されている。
【００４０】
この楕円形状の第１補強パネル２１の上下方向の最大長さεは、上部１０の上下方向長さの５％〜９０％程度がよいが、望ましくは１０％〜５０％がよい。また、第１補強パネル２１の周方向の最大長さζは、上部１０の上下方向長さの５％〜４０％程度がよいが、望ましくは１０％〜３０％がよい。
【００４１】
このように周縁から中央に向かって徐々に深くなるとともに横方向リブ１３,１４,１５,１６に連続する第１補強パネル２１を設けることにより、合成樹脂製壜体１を保持する際、あるいは合成樹脂製壜体１の搬送の際に、合成樹脂製壜体１のこの補強パネル設置面に垂直力が加えられたとき、この垂直力が第１補強パネル２１によって分散されるので、従来上部１０外面と補強パネルとの間の角部に生じていたエッジ力（集中荷重）が生じなくなり、その結果垂直力による合成樹脂製壜体１の変形が防止されるようになる。また、第１補強パネル２１の凹みに、合成樹脂製壜体１を保持する親指等の指が的確にフィットするようになるので、合成樹脂製壜体１が持ち易くなり、合成樹脂製壜体１内の充填物を注ぎ出す際に、安定した状態で充填物を注ぎ出すことができるようになる。
【００４２】
なお図１に示す例では、比較的大きな楕円形状の凹部からなる第１補強パネル２１を１個設けるようにしているが、第１補強パネル２１の周方向長さを短くして、第１補強パネル２１を周方向に所定数設けるようにすることもできる。また、第１補強パネル２１を４条の横方向リブ１３,１４,１５,１６の全部に係るようにして設けているが、第１補強パネル２１を任意の条数の横方向リブに係るようにすることもできる。更に、第１補強パネル２１の形状は楕円形状以外に、円形や長円形状等の種々の形状に形成することができる。
【００４３】
この第１補強パネル２１の上方には、周方向に延びる補強リブ２２が形成されている。この補強リブ２２は截頭角錐台状の凹部として形成されている。この補強リブ２２は、図示しないがそれぞれ合成樹脂製壜体１の背面にも形成されている。そして、この横方向リブ２２により、第１補強パネル２１の上方の、上部１０の平面部の延長部分が補強され、この部分が変形し難くなっている。
【００４４】
更に図１および図２に示すように、胴部４の下部１１における正面および左側面には、それぞれ第２および第３補強パネル２３,２４が形成されている。なお図示しないが、下部１１における背面および右側面にも、それぞれこれらの第２および第３補強パネル２３,２４が形成されている。第２補強パネル２３は、図８に示すように下部１１の外面から凹んでいるとともに、図１から明らかなように全体として角部が丸くされた矩形状に形成されている。この第２補強パネル２３は、上部側凹凸条部２５と、下部側凹凸条部２６と、これら上下側凹凸条部２５,２６の間に形成された周方向に延びる凹部２７とからなっている。
【００４５】
上部側凹凸条部２５は、上下方向に延びるとともに周方向に繰り返して配置された所定本数の凹凸条を備えているとともに、図９（ａ）に示すようにこれらの凹凸条により、その横断面形状が三角波状の波形パネルとして形成されている。
【００４６】
これらの凹凸条の凹部の深さηは、下部１１の厚みが０.３ｍｍ、下部１１の全周が３８５ｍｍ、下部１１の長辺側の平面部の周方向長さが７５.３８ｍｍ、下部１１の短辺側の平面部の周方向長さが５２.８６ｍｍ、下部１１の上下方向長さが９９ｍｍであるとき、下部１１の外面から２ｍｍ〜１０ｍｍ程度がよく、望ましくは２ｍｍ〜５ｍｍがよい。また、凹凸条の凸部の深さκは、下部１１の外面から０.２ｍｍ〜８ｍｍ程度がよく、望ましくは０.５ｍｍ〜３ｍｍがよい。更に、１つの凹凸条の幅（すなわち三角波のピッチ）λは２〜１０ｍｍ程度がよく、望ましくは３〜６ｍｍがよい。更に、凹凸条の三角波の角度θは２０゜〜１２０゜程度がよく、望ましくは３０゜〜９０゜がよい。これらの数値も、ボトルの材質の特性によるものでテストでの経験値から求められた値であり、ボトルの大きさに関係しない絶対値である。
【００４７】
下部側凹凸条部２６は、上部側凹凸条部２５と上下方向に対称の形成され、それらの凹凸が上部側凹凸条部２５の凹凸と同数でかつ上下方向に整列されて形成される点が異なるだけで、その他は上部側凹凸条部２５とまったく同じに形成されているので、その説明は省略する。
【００４８】
凹部２７は、深くなるにしたがって断面が小さくなる断面四角形の截頭角錐台状の凹部として形成されているとともに、第２補強パネル２３のなかで最も深く形成されている。
【００４９】
そして、凹部２７の幅μは２ｍｍ〜１０ｍｍ程度がよく、望ましくは３ｍｍ〜７ｍｍがよい。また、下部１１の外面からの凹部２７の凹部の深さνは、２.２ｍｍ〜１５ｍｍ程度がよく、望ましくは２.５ｍｍ〜１３ｍｍがよいが、少なくとも深さνは上部側凹凸条部２５の凹部の深さηより深く設定される必要があり、その場合、上部側凹凸条部２５の凹部の底部からの凹部２７の深さξは、０.２ｍｍ〜５ｍｍ程度がよく、望ましくは０.５ｍｍ〜３ｍｍがよい（すなわち、ν=η＋ξ）。これらの数値も、ボトルの材質の特性によるものでテストでの経験値から求められた値であり、ボトルの大きさに関係しない絶対値である。
【００５０】
また、合成樹脂製壜体１の左右側面に形成されている第３補強パネル２４は、図２に示すように前述の第２補強パネル２３の場合と同様に、上部２８と、下部２９と、横方向リブ３０とからなっているとともに、第２補強パネル２３に対して周方向の長さが短いととも凹凸条の条数が少ないだけで、その他はまったく同じに形成されているので、その説明は省略する。
【００５１】
このように第２および第３補強パネル２３,２４を設けることにより、上部側凹凸条部２５と下部側凹凸条部２６との間に１つの凹部２７が形成されるので、胴部４の下部１１は合成樹脂製壜体１内の減圧および加圧に対して柔軟性を有するようになる。これにより、胴部４の下部１１が上部側凹凸条部２５と下部側凹凸条部２６とによって補強されてぺこぺこした状態が防止され、しかも凹部２７により下部１１は合成樹脂製壜体１内の減圧および加圧に対して柔軟性を有するようになって潰れ難くなり、ある一定以上の押し圧による下部１１の潰れを、従来の合成樹脂製壜体に比べてより確実に防止できるようになる。更にこの凹部２７は横方向リブとしても機能して下部１１の強度を向上させている。
【００５２】
また、胴部４の下部１１においては、合成樹脂製壜体１の収納物の自重による圧力が高くなっているが、この圧力による押し圧が合成樹脂製壜体１の内部から外部に向かって加えられても、これらの第２および第３補強パネル２３,２４により、従来の合成樹脂製壜体の場合のような下部１１の膨れの変形を防止することができるようになる。
【００５３】
更に、下部１１の正面および左側面には、それぞれ周方向に延びる補強リブ３１,３２が形成されている。これらの補強リブ３１,３２は、その幅が第２および第３補強パネル２３,２４の凹部２７,３０の幅よりも狭く設定されているが、その周方向の長さが凹部２７,３０の周方向長さよりも長く設定されている。これらの補強リブ３１,３２は、補強リブ２２と同様にその截頭角錐台状の凹部として形成されている。これらの補強リブ３１,３２は、図示しないがそれぞれ合成樹脂製壜体１の背面および右側面にも形成されている。これらの補強リブ３１,３２により、第２および第２補強パネル２３,２４と横方向リブ１２との間の部分が補強され、この部分が変形し難くなっている。
【００５４】
更に、横方向リブ１２は、図１および図２に示すように上部１０側斜面側壁１２ａと、下部１１側斜面側壁１２ｂと、これらの両斜面側壁側壁１２ａ,１２ｂとの間の底部１２ｃとからなるとともに、断面が台形状の凹部に形成されており、合成樹脂製壜体１の全周に形成されている。この横方向リブ１２の凹部の底部１２ｃには、合成樹脂製壜体１の正面および左側面の各中央部分に、それぞれその幅がその他の部分の一定幅πより拡大した拡幅部からなる潰れ防止リブ部３３,３４が形成されているとともに、図１０（ａ）から明らかなように、この潰れ防止リブ部３３はその中央で左右対称の菱形形状に形成されていて、その幅が潰れ防止リブ部３３の左右端から中央に向かって徐々に広くなって中央で最大幅ρとなるように設定されている。
【００５５】
そして、横方向リブ１２の底部１２ｃの通常部分の幅πは、前述の上部１０及び下部１１の各寸法に対して、２ｍｍ〜１０ｍｍ程度がよく、望ましくは３ｍｍ〜７ｍｍがよい。また、横方向リブ１２の底部１２ｃの潰れ防止リブ部３３の最大幅ρは、通常部分の幅πの１.２〜３倍程度がよく、望ましくは１.５〜２倍がよい。更に、潰れ防止リブ部３３の拡大角度θ′は、２゜〜９０゜倍程度がよく、望ましくは５゜〜５０゜がよい。これらの数値も、ボトルの材質の特性によるものでテストでの経験値から求められた値であり、ボトルの大きさに関係しない絶対値である。
【００５６】
この潰れ防止リブ部３３の形成領域では、上部１０側斜面側壁１２ａおよび下部１１側斜面側壁１２ｂは、潰れ防止リブ部３３の端から中央に向かってその傾斜が緩斜面から急斜面に連続的に変化している。また、合成樹脂製壜体１の左側面に形成された潰れ防止リブ部３４も潰れ防止リブ部３３とまったく同じ形状に形成されているので、その説明は省略する。更に、これらの潰れ防止リブ部３３,３４は、それぞれ合成樹脂製壜体１の横方向リブ１２の背面および右側面にも形成されている。なお、潰れ防止リブ部３３,３４は各面に複数個設けることもできる。また、合成樹脂製壜体１の横方向リブ１２の左右側面に形成した潰れ防止リブ部３４は、合成樹脂製壜体１を保持する際、その保持力によって横方向リブ１２が潰れ変形起こすおそれがない場合には、省略することもできる。更に、潰れ防止リブ部３３,３４の形状は菱形以外に、例えば図１１（ａ）に示すような楕円形状や同図（ｂ）に示すような長円形状に形成することもできる。
【００５７】
このように横方向リブ１２の底部１２ｃに潰れ防止リブ部３３,３４を設けることにより、合成樹脂製壜体１の保持圧（押し圧）に対して柔軟性を有するようになる。これにより、合成樹脂製壜体１を保持する際、合成樹脂製壜体１の中央部分がその保持圧に対して柔軟性を発揮して潰れ難くなり、最も変形し易い胴部４の中央部分の潰れを、従来の合成樹脂製壜体に比べてより確実に防止できるようになる。
【００５８】
実際に、ポリエチレンテレフタレートを用い、厚みを０.３ｍｍ、高さを３０５ｍｍ、胴部４の上部１０の全周を３７３ｍｍおよび高さを７０ｍｍ、胴部４の下部１１の全周を３８５ｍｍおよび高さを９９ｍｍ、４条の横方向リブ１３,１４,１５,１６の幅αを７ｍｍおよび深さβを２.５ｍｍ、および潰れ防止リブ部１７,１８,１９,２０の長さγを１０ｍｍ、第１補強パネル２１の上下方向の最大長さεを６２.０ｍｍ、第１補強パネル２１の周方向の最大長さζを４０.０ｍｍ、周方向の補強リブ２２の周方向長さ３０.０ｍｍおよび幅５.０ｍｍ、補強リブ２２の深さ２.５ｍｍ、周方向の補強リブ３１の周方向長さ６０.０ｍｍおよび幅５.０ｍｍ、補強リブ３１の深さ２.５ｍｍ、周方向の補強リブ３２の周方向長さ３５.０ｍｍおよび幅５.０ｍｍ、補強リブ３１の深さ２.５ｍｍ、胴部４の上部１０と下部１１との間の横方向リブ１２の幅を１５.５ｍｍ、合成樹脂製壜体１の左右側面における横方向リブ１２の上部１０の外面からの深さ３.５ｍｍおよび合成樹脂製壜体１の正面と背面における横方向リブ１２の上部１０の外面からの深さ２.５ｍｍ、横方向リブ１２の底部１２ｃの通常部分の幅πを５.００ｍｍおよび底部１２ｃの全周を３４９ｍｍ、潰れ防止リブ部３３の最大幅ρを９.００ｍｍおよび拡幅部の周方向の長さを４０.００ｍｍ、潰れ防止リブ部３４の最大幅ρを９.００ｍｍおよび拡幅部の周方向の長さを３０.００ｍｍ、第２補強パネル２３の周方向の長さ５０.００ｍｍおよび上下方向の長さ７７.００ｍｍ、上部側凹凸条部２５および下部側凹凸条部２６の周方向の長さ４２.００ｍｍおよび上下方向の長さを３４.００ｍｍ、凹凸条部２５,２６の１つの凹凸条の幅λを６.００ｍｍ、凹部２７の幅９.００ｍｍおよび周方向長さ５０.００ｍｍ、第３補強パネル２４の周方向の長さ３０.００ｍｍおよび上下方向の長さ７７.００ｍｍ、上部側凹凸条部２８および下部側凹凸条部２９の周方向の長さ２４.００ｍｍおよび上下方向の長さを３４.００ｍｍ、凹凸条部２８,２９の１つの凹凸条の幅λを６.００ｍｍ、凹部３０の幅９.００ｍｍおよび周方向長さ３０.００ｍｍ、横方向リブ５の幅７.００ｍｍ、口部２および肩部３の上下方向の長さ８０.００ｍｍ、および底部の上下方向の長さ３３.５ｍｍからなる図１ないし図３に示す形状の本発明の合成樹脂壜体１と、横方向リブ１３,１４,１５,１６を左右側面で連続して形成して潰れ防止リブ部を形成しなく、その他は潰れ防止リブ部１７,１８,１９,２０のある本発明の合成樹脂壜体１とまったく同じに形成した合成樹脂製壜体１とをそれぞれ作製し、これらの合成樹脂壜体１を用いてφ１０ｍｍの円盤を潰れ防止リブ部およびこの潰れ防止リブ部に対応する部分に押し当てることにより、第１の押圧試験をした結果、表１に示す結果が得られた。
【００５９】
【表１】

Figure 0003982651
【００６０】
表１から明らかなように、合成樹脂製壜体１の潰れが発生した押し圧はいずれの合成樹脂製壜体１も５.５Kg・fであるとともに、このとき、横方向リブ１３,１４,１５,１６に潰れ防止リブ部がある合成樹脂製壜体の潰れるまでの変形量は１０ｍｍで、潰れ防止リブ部がない合成樹脂製壜体の潰れるまでの変形量は５ｍｍであり、潰れ防止リブ部１７,１８,１９,２０がある合成樹脂製壜体１は潰れ防止リブ部がない合成樹脂製壜体１に比べて２倍も大きいことが分かった。すなわち、横方向リブ１３,１４,１５,１６の潰れ防止リブ部１７,１８,１９,２０により、合成樹脂製壜体１は柔軟性が増して潰れ難くなり、その結果本発明の合成樹脂製壜体１は、従来の合成樹脂製壜体１に比べてより確実に潰れを防止できることが分かった。
【００６１】
また、前述の第１の押圧試験に用いた本発明の合成樹脂製壜体１とまったく同じ合成樹脂製壜体１を作製するとともに、第１補強パネル２１を形成しないで、横方向リブ１３,１４,１５,１６を周方向に連続に形成し、その他は第１補強パネル２１のある本発明の合成樹脂壜体１とまったく同じに形成した合成樹脂製壜体１とをそれぞれ作製し、これらの合成樹脂壜体１を用いてφ１０ｍｍの円盤を補強パネル面におよびこの補強パネル面に対応する部分に押し当てることにより、第２の押圧試験をした結果、表２に示す結果が得られた。
【００６２】
【表２】
Figure 0003982651
【００６３】
表２から明らかなように、合成樹脂製壜体１の潰れが発生した押し圧は、第１補強パネル２１のある合成樹脂製壜体１が２.５Kg・fであるとともに第１補強パネル２１のない合成樹脂製壜体１が２.０Kg・fであり、潰れが発生する押し圧は、第１補強パネル２１のある合成樹脂製壜体１の方が大きくなることが分かった。すなわち、この第１補強パネル２１により、潰れが発生する押し圧が向上し、第１補強パネル２１のある合成樹脂製壜体１の押し圧に対する強度が増大するようになる。また、潰れが発生するまでの押した距離は、第１補強パネル２１のある合成樹脂製壜体１が６ｍｍであるとともに第１補強パネル２１のない合成樹脂製壜体１が３ｍｍであり、第１補強パネル２１がある合成樹脂製壜体１は第１補強パネル２１がない合成樹脂製壜体１に比べて２倍も長くなることが分かった。すなわち、この第１補強パネル２１により、潰れ発生までの押し距離が長くなって柔軟性が向上して潰れにくくなるので、第１補強パネル２１のある合成樹脂製壜体１の潰れ変形を従来の合成樹脂製壜体１に比べてより確実に防止できることが分かった。
【００６４】
更に、前述の第１の押圧試験に用いた本発明の合成樹脂製壜体１とまったく同じ合成樹脂製壜体１を作製するとともに、潰れ防止リブ部３３,３４がなく、その他は潰れ防止リブ部３３,３４のある本発明の合成樹脂壜体１とまったく同じに形成した合成樹脂製壜体１とをそれぞれ作製し、これらの合成樹脂壜体１を用いてφ１０ｍｍの円盤を潰れ防止リブ部３３,３４およびこの潰れ防止リブ部に対応する部分に押し当てることにより、第３の押圧試験をした結果、表３に示す結果が得られた。
【００６５】
【表３】
Figure 0003982651
【００６６】
表３から明らかなように、合成樹脂製壜体１の潰れが発生した押し圧は、潰れ防止リブ部３３,３４のある合成樹脂製壜体１が３.５Kg・fであるとともに潰れ防止リブ部３３,３４のない合成樹脂製壜体１が２.５Kg・fであり、潰れが発生する押し圧は、潰れ防止リブ部３３,３４のある合成樹脂製壜体１の方が大きくなることが分かった。すなわち、これらの潰れ防止リブ部３３,３４により、潰れが発生する押し圧が向上し、潰れ防止リブ部３３,３４のある合成樹脂製壜体１の押し圧に対する強度が増大するようになる。また、潰れが発生するまでの押した距離は、潰れ防止リブ部３３,３４のある合成樹脂製壜体１が８ｍｍであるとともに潰れ防止リブ部３３,３４のない合成樹脂製壜体１が４ｍｍであり、潰れ防止リブ部３３,３４がある合成樹脂製壜体１は潰れ防止リブ部３３,３４がない合成樹脂製壜体１に比べて２倍も長くなることが分かった。すなわち、これらの潰れ防止リブ部３３,３４により、潰れ発生までの押し距離が長くなって柔軟性が向上して潰れにくくなるので、潰れ防止リブ部３３,３４のある合成樹脂製壜体１の潰れ変形を従来の合成樹脂製壜体１に比べてより確実に防止できることが分かった。
【００６７】
【発明の効果】
以上の説明から明らかなように、本発明の合成樹脂製壜体によれば、補強パネル、横方向リブ、補強リブ部、および柔軟性付与部のいくつかまたは全部を適宜組み合わせることにより、合成樹脂製壜体の強度を増大させながら、しかも合成樹脂製壜体に柔軟性を持たせることができるとともに、合成樹脂製壜体に加えられる力を分散させることができる。これにより、合成樹脂製壜体に加えられる外力、壜体の保持圧、合成樹脂製壜体内の減圧あるいは加圧、あるいは合成樹脂製壜体内の充填物の自重よる加圧に基づく、合成樹脂製壜体の復元しないような潰れ変形をより効果的に防止することができるようになる。
【００６８】
したがって、ホットフィルやコールドフィル等の液体の充填を始め、幅広い用途に確実に対応することができるようになるとともに、外観が損なわれるのを阻止でき、商品価値の低下を防止できる。
【図面の簡単な説明】
【図１】 本発明にかかる合成樹脂製壜体の実施の形態の一例を示す正面図である、図２はこの例の左側面図、図３は平面図である。
【図２】 図１に示す例の合成樹脂製壜体の左側面図である。
【図３】 図１に示す例の合成樹脂製壜体の平面図である。
【図４】 図１に示す例の合成樹脂製壜体の横方向リブを部分的に示す部分拡大図である。
【図５】 図２におけるV-V線に沿う断面図である。
【図６】 図１におけるVI-VI線に沿う断面図である。
【図７】 図１に示す例の合成樹脂製壜体の第１補強パネルを示し、（ａ）は図１におけるVIIA-VIIA線に沿う断面図、（ｂ）は図１におけるVIIB-VIIB線に沿う断面図、（ｃ）は図１におけるVIIC-VIIC線に沿う断面図である。
【図８】 図２におけるVIII-VIII線に沿う断面図である。
【図９】 図１に示す例の合成樹脂製壜体の第２補強パネルを示し、（ａ）は図１におけるIXA-IXA線に沿う断面図、（ｂ）は図１におけるIXB-IXB線に沿う断面図である。
【図１０】図１に示す例の合成樹脂製壜体の潰れ防止リブを示し、（ａ）は部分拡大図、（ｂ）は（ａ）におけるXB-XB線に沿う断面図である。
【図１１】（ａ）は図１に示す例の合成樹脂製壜体の潰れ防止リブの他の例を示す図１０（ａ）と同様の図、（ｂ）は潰れ防止リブの更に他の例を示す図１０（ａ）と同様の図である。
【符号の説明】
１…合成樹脂製壜体、２…口部、３…肩部、４…胴部、５…横方向リブ、６…底部、１０…上部、１１…下部、１２…横方向リブ、１３,１４,１５,１６…横方向リブ、１７,１８,１９,２０…不連続部、２１…第１補強パネル、２３…第２補強パネル、２４…第３補強パネル、２５,２８…上部側凹凸条部、２６,２９…下部側凹凸条部、２７,３０…凹部、３３,３４…潰れ防止リブ部[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the technical field of synthetic resin casings formed by biaxial stretch blow molding, and is particularly suitable for a wide range of applications, such as liquid filling of hot fill and cold fill. And belongs to the technical field of synthetic resin casings having a holding pressure resistance and the like.
[0002]
[Prior art]
In recent years, synthetic resin casings formed by biaxial stretch blow molding using saturated polyester resin typified by polyethylene terephthalate, etc. are used for various drinking water such as juice and mineral water, seasonings, alcoholic beverages, and other foods. Widely used for storage baskets.
[0003]
By the way, such a synthetic resin case is pressurized when the body portion of the synthetic resin case is pressurized by the weight of the content to be filled, or when the synthetic resin case is filled with the content. For example, an external force may be applied to the elastic deformation. In addition, in a hot fill filled with a high-temperature liquid, if the high-temperature liquid is filled in a synthetic resin casing and kept in a capped state, the filling in the synthetic resin casing is cooled and the synthetic resin casing is cooled. In a cold fill where the internal pressure of the housing is reduced and the body of the synthetic resin housing is pressed by atmospheric pressure, or a low temperature liquid is filled in the synthetic resin housing, the low temperature liquid is used as the synthetic resin. If the case is filled and plugged, the filling in the synthetic resin case is warmed, the internal pressure of the synthetic resin case rises, and the body of the synthetic resin case is added. Similarly, the body portion of the synthetic resin casing is elastically deformed.
[0004]
Therefore, conventionally, as disclosed in, for example, Japanese Patent Laid-Open No. 6-127543, several lateral ribs for reinforcement consisting of concave grooves extending in the circumferential direction of a synthetic resin casing are provided on the casing body. It is provided on each surface or a reinforcing panel consisting of uneven parts is provided on each surface of the case body so as to increase the strength of the body and suppress the elastic deformation of the body of the synthetic resin case as described above. I have to.
[0005]
Further, in order to prevent elastic deformation of the body portion of the synthetic resin casing, for example, as disclosed in Japanese Utility Model Laid-Open No. 5-94112, reinforcement of a concave groove extending over the entire circumference is provided. There are also some combinations of such circumferential ribs and a reinforcing panel made up of concave and convex portions.
[0006]
[Problems to be solved by the invention]
However, the synthetic resin casings disclosed in the above-mentioned publications all improve the strength of the synthetic resin casing by the reinforcing ribs and the reinforcing panels, but on the other hand, there is not much flexibility, so these reinforcements The external force applied to the ribs and the reinforcing panel in the lateral direction, decompression in the synthetic resin housing in hot fill, pressurization in the synthetic resin housing in cold fill, or pressurization by the weight of the filler in the synthetic resin housing There is a case where the original pressure cannot be restored due to a deformation that does not restore due to the pressing force exceeding a certain level based on the above. In general, when holding a synthetic resin casing, a relatively wide flat portion on the long side of the rectangular synthetic resin casing is held, but holding pressure is applied to the relatively wide flat portion. As a result, the reinforcing ribs and the like formed on the flat portion are crushed and may not be restored in the same manner. Further, since the reinforcing rib and the reinforcing panel are discontinuously formed apart from each other, when a pressing force is applied to the side surface direction of the synthetic resin casing, the boundary between the reinforcing rib and the reinforcing panel is Since the edge force is concentrated on the edge portion of the boundary, it is easily deformed and may not be restored after the deformation.
[0007]
Thus, if the synthetic resin casing is crushed and deformed so as not to be restored, not only the strength of the synthetic resin casing is lowered, but also the appearance of the synthetic resin casing is impaired, and the commercial value Will drop significantly.
[0008]
The present invention has been made in view of such a problem, and an object of the present invention is to provide a synthetic resin casing that can increase the strength and prevent the deformation deformation of the reinforcing ribs and the reinforcing panels. Is to provide.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention of claim 1 comprises a mouth, a shoulder continuous with the mouth, a trunk continuous with the shoulder, and a bottom continuous with the shoulder. In the synthetic resin casing in which these parts are integrally formed of a synthetic resin, a predetermined number of lateral ribs formed of concave grooves extending in the circumferential direction are formed on the upper portion of the body part. A first reinforcing panel is formed in a part of a region where the directional rib is formed, and the first reinforcing panel is formed of a concave portion having a predetermined shape continuous with the concave groove of the lateral rib.
The depth of the concave portion of the first reinforcing panel gradually and continuously increases from the edge of the concave portion toward the center, and the depth of the concave portion is a concave portion of the lateral rib near the edge of the concave portion. It is set shallower than the depth of the groove, and is set deeper than the depth of the concave groove of the lateral rib in the vicinity of the central portion of the concave portion. And a lower-side concavo-convex portion extending in the vertical direction provided below the upper-side concavo-convex portion, and a circumferentially extending recess provided between these and the lower-side concavo-convex portion. It is characterized in that a reinforcing panel is formed.
[0010]
According to a second aspect of the present invention, a second lateral rib is formed between the upper portion and the lower portion of the body portion, and the second lateral rib includes an upper and lower inclined side surface portion and an inclination thereof. It is formed in a trapezoidal shape having a bottom portion located between the side portions, and the cross section becomes narrower as it becomes deeper from the outer surface of the body portion, and a width of the bottom portion is formed in a part of the second lateral rib. The reinforcing rib portion is formed of a widened portion that is wider than the bottom portion of the second lateral rib and extends in the circumferential direction, and the widened portion of the reinforcing rib portion is centered from both circumferential ends. It is characterized by being set so that it gradually becomes wider and becomes maximum in the center.
[0011]
Further, the invention of claim 3 comprises a mouth portion, a shoulder portion continuing to the mouth portion, a trunk portion continuing to the shoulder portion, and a bottom portion continuing to the trunk portion, each of which is made of a synthetic resin. In the integrally formed synthetic resin casing, a predetermined number of lateral ribs formed of concave grooves extending in the circumferential direction are formed on the upper portion of the body portion, and the region in which the lateral ribs are formed is formed. A reinforcing panel composed of a concave portion having a predetermined shape that is continuous with the concave groove of the lateral rib is formed in a partial region, and the depth of the concave portion of the reinforcing panel gradually increases from the edge of the concave portion toward the center. The depth of the concave portion is set to be shallower than the depth of the concave groove of the lateral rib near the edge of the concave portion, and the concave portion of the lateral rib is near the central portion of the concave portion. It is set deeper than the depth of the groove, A second lateral rib is formed between the upper part and the lower part of the recording body part, and the second lateral rib is a bottom part located between the upper and lower inclined side parts and these inclined side parts. The cross section is formed into a trapezoidal shape whose cross section becomes narrower from the outer surface of the body portion, and a width of the bottom portion of the second lateral rib is a part of the second lateral rib. A reinforcing rib portion is formed that is wider than the width of the bottom portion of the other portion and extends in the circumferential direction. The widened portion of the reinforcing rib portion is gradually widened from both ends in the circumferential direction toward the center. It is characterized in that it is set to be the maximum.
[0012]
Further, in the invention of claim 4 and claim 12, a plurality of the lateral ribs are formed, and among the plurality of lateral ribs, a part of the lateral ribs has a depth of the recess of the reinforcing panel. It is formed in a region shallower than the depth of the concave groove of the lateral rib, and the depth of the lateral rib in this region is gradually shallower as the depth of the concave portion of the reinforcing panel becomes deeper. Among the plurality of lateral ribs, the other lateral ribs include a region where the depth of the concave portion of the reinforcing panel is shallower than the depth of the concave groove of the lateral rib and the depth of the concave portion of the reinforcing panel is the lateral width. The other lateral rib is formed in a region where the depth of the recessed portion of the reinforcing panel is shallower than the depth of the recessed groove of the lateral rib. However, the depth of the concave portion of the reinforcing panel is It is characterized in that disappears in deeper than the depth of the groove in the rib area.
[0013]
Furthermore, the invention of claim 5 comprises a mouth, a shoulder continuous with the mouth, a trunk continuous with the shoulder, and a bottom continuous with the shoulder, each of which is made of synthetic resin. In the integrally formed synthetic resin casing, a second lateral rib is formed between the upper portion and the lower portion of the body portion, and the second lateral rib is formed by upper and lower inclined side portions. And a bottom portion located between these inclined side portions, the cross section is formed in a trapezoidal shape that becomes narrower as it becomes deeper from the outer surface of the body portion, and a part of the second lateral rib is The reinforcing rib portion is formed of a widened portion whose width of the bottom portion is wider than the width of the bottom portion of the other portion of the second lateral rib and extends in the circumferential direction, and the widened portion of the reinforcing rib portion is in the circumferential direction. It gradually widens from both ends to the center and becomes the maximum at the center. The upper side uneven strip extending in the vertical direction at the lower portion of the trunk portion, the lower side uneven strip below the upper side uneven strip, and the upper and lower side uneven strips above these The reinforcing panel which consists of the recessed part extended in the circumferential direction between is formed.
[0014]
Further, the invention according to claim 6 is characterized in that the upper side uneven portion and the lower side uneven portion are formed in the same number and aligned vertically.
Further, the invention of claim 7 comprises a mouth portion, a shoulder portion continuing to the mouth portion, a trunk portion continuing to the shoulder portion, and a bottom portion continuing to the trunk portion, each of which is made of a synthetic resin. In the integrally formed synthetic resin casing, a predetermined number of lateral ribs formed of concave grooves extending in the circumferential direction are formed on the upper portion of the trunk portion, and the concave grooves are formed in a part of the lateral ribs. Is formed of a discontinuous portion where the disappearance is formed, and an upper side uneven portion extending in the vertical direction is formed at a lower portion of the body portion, and a lower side uneven portion is provided below the upper side uneven portion. And the recessed part extended in the circumferential direction is formed between these upper and lower side uneven | corrugated strips, It is characterized by the above-mentioned.
[0015]
Further, according to the invention of claim 8, a second lateral rib is formed between the upper portion and the lower portion of the body portion, and the second lateral rib includes an upper and lower inclined side surface portion and an inclined portion thereof. It is formed in a trapezoidal shape having a bottom portion located between the side portions, and the cross section becomes narrower as it becomes deeper from the outer surface of the body portion, and a width of the bottom portion is formed in a part of the second lateral rib. The reinforcing rib portion is formed of a widened portion that is wider than the bottom portion of the second lateral rib and extends in the circumferential direction, and the widened portion of the reinforcing rib portion is centered from both circumferential ends. It is characterized by being set so that it gradually becomes wider and becomes maximum in the center.
[0016]
Further, the invention of claim 9 comprises a mouth, a shoulder continuous with the mouth, a body continuous with the shoulder, and a bottom continuous with the body, each of which is made of synthetic resin. In the integrally formed synthetic resin casing, a predetermined number of lateral ribs formed of concave grooves extending in the circumferential direction are formed on the upper portion of the trunk portion, and the concave grooves are formed in a part of the lateral ribs. Is formed of a discontinuous portion, and a second lateral rib is formed between the upper portion and the lower portion of the trunk portion, and the second lateral rib is The second lateral rib is formed in a trapezoidal shape in which the cross-section is made narrower as it becomes deeper from the outer surface of the body portion, and is composed of upper and lower inclined side portions and a bottom portion located between these inclined side portions. A width of the bottom portion of the second lateral rib. The reinforcing rib part is formed of a widened part that is wider than the bottom part of the part and extends in the circumferential direction, and the widened part of the reinforcing rib part gradually becomes wider from the circumferential ends toward the center. It is characterized by being set to the maximum.
[0017]
Further, the invention of claim 10 comprises a mouth portion, a shoulder portion continuing to the mouth portion, a body portion having a rectangular cross section continuing to the shoulder portion, and a bottom portion continuing to the body portion. In a synthetic resin casing in which each part is integrally formed of a synthetic resin, a predetermined number of lateral ribs formed of concave grooves extending in the circumferential direction are provided on the upper side of the long side and the short side of the rectangular body. A reinforcing panel made of a concave portion having a predetermined shape that is continuous with the concave groove of the lateral rib is formed in a region on the long side where the lateral rib is formed, and the concave portion of the reinforcing panel is formed. The depth of the recess gradually and continuously increases from the edge of the recess toward the center, and the depth of the recess is set shallower than the recess groove of the lateral rib in the vicinity of the edge of the recess. Near the center of the recess. The depth of the groove is set to be deeper, and a flexibility imparting portion formed of a discontinuous portion in which the groove disappears in a part of the lateral rib formed on the short side of the trunk is formed. It is characterized by being.
[0018]
Furthermore, the invention according to claim 11 is characterized in that an upper side concavo-convex ridge extending in the vertical direction is provided at the lower part of at least one of the long side and the short side of the body part, and a lower side below the upper side concavo-convex ridge It is characterized in that a second reinforcing panel is formed which includes a concavo-convex portion and a concave portion extending in the circumferential direction between the upper and lower side concavo-convex portions.
[0019]
Further, in the invention of claim 12, a plurality of the lateral ribs are formed, and among the plurality of lateral ribs, a part of the lateral ribs has a depth of the concave portion of the reinforcing panel. The depth of the lateral rib in this region is gradually shallower as the depth of the recessed portion of the reinforcing panel becomes deeper, Among the lateral ribs, the other lateral ribs include a region where the depth of the concave portion of the reinforcing panel is shallower than the depth of the concave groove of the lateral rib and the depth of the concave portion of the reinforcing panel is the concave portion of the lateral rib. The other lateral rib is formed in a region where the depth of the concave portion of the reinforcing panel is shallower than the depth of the concave groove of the lateral rib. The depth of the concave portion of the reinforcing panel It is characterized in that in the region deeper than the depth disappears.
[0020]
Furthermore, in the invention of claim 13, a second lateral rib is formed between the upper part and the lower part of at least one of the long side and the short side of the body part. The lateral rib is formed in a trapezoidal shape having a cross section that becomes narrower as it becomes deeper from the outer surface of the body portion, which is composed of upper and lower inclined side portions and a bottom portion located between these inclined side portions. A reinforcing rib portion having a widened portion extending in the circumferential direction is formed in a part of the lateral rib of the second lateral rib, and the width of the bottom portion is wider than the width of the bottom portion in the other portion of the second lateral rib. The widened portion of the reinforcing rib portion is characterized in that it is set so as to be gradually widened from both ends in the circumferential direction toward the center and maximized at the center.
[0021]
Furthermore, the invention of claim 14 is characterized in that a reinforcing panel comprising a concave portion continuous with the concave groove of the lateral rib is formed in a circular shape, an elliptical shape, an elliptical shape, or a rhombus shape.
Furthermore, the invention of claim 15 is characterized in that the widened portion of the reinforcing rib portion is formed in a circular shape, an elliptical shape, an elliptical shape, or a rhombus shape.
[0022]
[Action]
In the synthetic resin casing of the present invention configured as described above, from a recessed portion having a predetermined shape continuous to the recessed groove of the lateral rib in a region of a part of the region in which the laterally extending rib is formed. This reinforcing panel disperses the vertical force applied to the reinforcing panel forming part of the trunk when holding the synthetic resin casing or transporting the synthetic resin casing. And no longer concentrate. As a result, the force applied to the reinforcing panel forming portion of the trunk portion is alleviated. Therefore, even if such a force is applied and the trunk portion is deformed, the trunk portion is restored to its original state when the force is removed. become. Therefore, the deformation | transformation which does not restore the trunk | drum by such force is prevented. In particular, the vertical force is more effectively dispersed by causing the concave portion of the reinforcing panel to gradually disappear the lateral rib in the concave portion.
[0023]
In addition, since the concave portion of the reinforcing panel is formed in the upper portion of the trunk portion, and the depth of the concave portion is set so as to gradually and continuously increase from the edge toward the center, A finger such as a thumb holding the synthetic resin casing can be accurately fitted. Thereby, it becomes easy to hold the synthetic resin casing, and when the liquid in the synthetic resin casing is poured out, the liquid can be poured out in a stable state.
[0024]
Furthermore, in the present invention, the reinforcing panel having a recess extending in the circumferential direction between the upper and lower ridges extending in the vertical direction is formed, whereby the trunk of the synthetic resin casing Becomes flexible. As a result, even if the inside of the synthetic resin casing is depressurized or pressurized due to the temperature change of the filling due to hot fill or cold fill, the body section is deformed, and the flexibility of the body section makes the synthetic resin casing When the decompression or pressurization inside the body is released, the body part is restored to its original state, and the body part is prevented from being crushed and deformed.
[0025]
Since such a reinforcing panel is formed in the lower portion of the trunk portion, the strength is improved, so that deformation of the swelling of the trunk portion due to pressurization based on the weight of the filler is prevented.
[0026]
Further, according to the present invention, the width of the bottom portion of a part of the transverse rib is the width of the bottom portion of the other portion of the transverse rib. Reinforcement ribs consisting of widened parts wider than the width and extending in the circumferential direction are formed, and the widened parts of the reinforcing ribs are gradually widened from both ends in the circumferential direction toward the center and set at the center. As a result, the vertical force applied to the lateral ribs of the body portion is dispersed and not concentrated, and the body portion has flexibility in the formation portion of the reinforcing rib portion. As a result, the force applied to the lateral rib forming part of the body part is relaxed and the body part becomes flexible, so that even if such a force is applied and the body part is deformed, the body is removed when the force is removed. Part will be restored to the original. Therefore, the deformation | transformation of the trunk | drum by such force is prevented.
[0027]
Further, in the present invention, a predetermined number of lateral ribs composed of concave grooves extending in the circumferential direction are formed on the upper portion of the body portion, and the concave grooves disappear in a part of the lateral ribs. By forming the flexibility imparting portion made of the above, the portion of the body portion where the strength of the lateral rib is increased has flexibility. Since the lateral rib forming portion is made flexible by this flexibility imparting portion, even if such a force is applied and the barrel is deformed, the barrel is restored to its original state when the force is removed. It becomes like this. Therefore, even if the strength of the trunk is increased by the lateral rib, the collapse of the trunk due to such a force is prevented.
[0028]
And in the synthetic resin casing of the present invention, the strength of the synthetic resin casing is improved by appropriately combining some or all of these reinforcing panels, lateral ribs, reinforcing rib portions, and flexibility imparting portions. In addition to increasing the flexibility of the synthetic resin casing and increasing the force applied to the synthetic resin casing, the external force applied to the synthetic resin casing and the reduced pressure in the synthetic resin casing Or the crushing deformation | transformation which does not restore | restore the synthetic resin casing based on pressurization comes to be prevented more effectively.
[0029]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a front view showing an example of an embodiment of a synthetic resin casing according to the present invention, FIG. 2 is a left side view of this example, and FIG. 3 is a plan view.
[0030]
As shown in FIG. 1 to FIG. 2, the synthetic resin casing 1 of this example includes a mouth part 2, a shoulder part 3 continuous from the mouth part 2, a trunk part 4 continuous from the shoulder part 3, It consists of the bottom part 6 which continues from this trunk | drum 4 via the horizontal rib 5, and these parts are integrally formed by blow molding using plastics, such as a polyethylene terephthalate. The lateral rib 5 is not necessarily required and can be omitted and the body 4 and the bottom 5 can be formed as one part. However, the strength against the pressing force such as pressurization due to the weight of the filler is sufficient. In order to ensure, it is desirable to be provided.
[0031]
The mouth portion 2 is formed in a cylindrical shape as in the case of the conventional synthetic resin casing 1, and a male screw 7 into which a cap (not shown) for closing the opening end of the mouth portion 2 is screwed is formed on the outer peripheral surface thereof. Has been. The shoulder portion 3 is formed in a reverse funnel shape as a whole, and includes an upper portion 8 and a lower portion 9. As shown in FIGS. 1 to 3, the upper part 8 is formed in a regular dodecagonal truncated pyramid shape, and the lower part 9 is a body part formed in a rectangular shape with four corners to be described later chamfered. 4 is bent along a line connecting the corners of the upper portion 10 of the upper portion 10 and the corners of the regular dodecagon of the upper portion 8 of the shoulder portion 3.
[0032]
Further, the body portion 4 includes an upper portion 10, a lower portion 11, and lateral ribs 12 extending in the circumferential direction formed between the upper portion 10 and the lower portion 11 and at substantially the center of the body portion 4. As shown in FIG. 3, the upper part 10 and the lower part 11 are formed in a rectangular shape in which the cross section of the outer shape is chamfered at four corners. In this case, the outer dimension of the upper part 10 is the same as that of the lower part 11. It is set slightly smaller than the external dimensions. Although not shown, the outer shape of the lateral rib 12 is also formed in a rectangular shape in which the four corners are chamfered relatively large like the upper portion 10 and the lower portion 11. Further, the four corner portions of the body portion 4 are not necessarily chamfered, and may be curved portions (R portions) having a predetermined radius of curvature.
[0033]
The upper portion 10 includes four lateral ribs 13, 14, 15, 16 formed of V-shaped grooves extending in the circumferential direction from the front and rear surfaces to the left and right side surfaces of the upper portion 10, respectively. Are formed at predetermined intervals in the vertical direction. These lateral ribs are not limited to four in the vertical direction, and can be formed in a predetermined number of one or more in the vertical direction.
[0034]
The width α of the recesses of these lateral ribs 13, 14, 15, 16 shown in FIG. 4 is such that the thickness of the upper portion 10 is 0.3 mm, the entire circumference of the upper portion 10 is 373 mm, and the upper portion 10 has a vertical length of 70 mm. Is preferably about 2 mm to 10 mm, preferably 3 mm to 7 mm, and the depth β of the recesses of the lateral ribs 13, 14, 15, 16 is about 0.5 mm to 10 mm from the outer surface of the upper part 10. However, it is preferably 0.5 mm to 5 mm. These numerical values depend on the characteristics of the material of the bottle, and are values obtained from experience values in the test, and are absolute values that are not related to the size of the bottle.
[0035]
These lateral ribs 13, 14, 15, and 16 extend in the circumferential direction, respectively, but are not formed over the entire circumference of the upper portion 10, and as shown in FIG. It is not formed in the central part of the left side. That is, each of the lateral ribs 13, 14, 15, and 16 is formed with a crush-preventing rib portion 17, 18, 19, and 20 that is a discontinuous portion having no rib at the center of the left side surface of the upper portion 10, respectively. The crush prevention rib portions 17, 18, 19, and 20 of the lateral ribs 13, 14, 15, and 16 are flush with the outer surface of the upper portion 10 (as an example, the crush prevention rib portion at the uppermost position). The case of 17 is shown in FIG. 5, but the same applies to the other crush prevention rib portions). These crush prevention rib portions 17, 18, 19, and 20 are formed not only on the left side surface of the upper portion 10 shown in FIG. 2, but also on the right side surface of the upper portion 10 that faces the left side surface (not shown). Has been. The crush prevention rib portions 17, 18, 19, and 20 may be formed on at least one side surface of the left and right side surfaces. 1 is desirable in order to exhibit flexibility more effectively.
The circumferential length γ of these crush prevention rib portions 17, 18, 19, and 20 is preferably 5 to 50% of the entire circumference of the upper portion 10, and preferably 10 to 15%.
[0036]
Thus, by providing the collapsible rib portions 17, 18, 19, 20 of the lateral ribs 13, 14, 15, 16 on the left and right side surfaces, which are the short sides of the synthetic resin casing 1, the lateral rib 13 14, 15, 16 are alleviated, and the left and right side surfaces of the upper part 10 of the synthetic resin casing 1 are provided with lateral ribs 13, 14, 15, 16 to increase the overall strength of the upper part 10. However, it has flexibility, that is, has a great resilience. Therefore, when a pressing force is applied to the left and right side surfaces of the upper portion 10 of the synthetic resin casing 1, even if the side surface of the upper portion 10 is greatly deformed compared to the conventional casing, the pressing pressure is removed. It will definitely restore to the original. As a result, the left and right side surfaces of the synthetic resin casing 1 are greatly deformed until they are crushed, in other words, they are not easily crushed. Thus, the crushing prevention ribs 17, 18, 19, and 20 of the lateral ribs 13, 14, 15, and 16 can surely prevent the side walls of the synthetic resin casing 1 from being crushed. Reference numerals 17, 18, 19, and 20 constitute the flexibility imparting portion of the present invention. In particular, in the case of this example, the left and right side surfaces of the upper portion 10 of the synthetic resin casing 1 are different from the comparatively wide front and rear surfaces of the upper portion 10 and are extremely rigid surfaces that cannot be formed on the panel surface. However, even in such a minimal surface, a flexible surface can be easily formed. In addition, when forming a bottle, it is possible to easily form a flexible bottle as a whole without forming a panel having a complicated shape.
[0037]
Further, as shown in FIG. 1, a first reinforcing panel 21 formed of an elliptical concave portion having a long axis in the vertical direction is provided in the central portion of the front side on the long side of the upper portion 10, and the lateral ribs 13, 14, 15, The first reinforcing panel 21 is continuous with the lateral ribs 13, 14, 15, and 16. Although not shown, the first reinforcing panel 21 is also formed in the central portion of the back surface facing the front surface of the upper portion 10. The first reinforcing panel 21 may be formed on at least one of the front surface and the back surface. However, forming the first reinforcing panel 21 on both surfaces as in this example makes the synthetic resin casing 1 more flexible. Desirable for effective display.
[0038]
As shown in FIGS. 6 and 7A, the first reinforcing panel 21 has both a longitudinal section and a transverse section formed in an arc shape or an elliptical arc shape, and gradually increases from the peripheral edge to the center portion. The first reinforcing panel 21 has a depth δ which is deepest at the center of the first reinforcing panel 21. Then, as shown in FIG. 7B, of the four lateral ribs 13, 14, 15, 16, the depth of the concave groove of the lateral rib 13 is at the formation position of the lateral rib 13 at the uppermost position. The depth β is deeper than the depth δ of the first reinforcing panel 21. Therefore, as shown in FIG. 1, the lateral rib 13 is continuously formed even in the region where the first reinforcing panel 21 is formed. However, in the region of the first reinforcing panel 21, the width α of the lateral rib 13 gradually and continuously narrows from the edge of the first reinforcing panel 21 toward the center. The width α of the lateral rib 13 is the narrowest. In other words, the depth β of the lateral rib 13 itself becomes shallower gradually and continuously from the edge of the first reinforcing panel 21 toward the center (at the position shown in FIG. 6, the depth of the lateral rib 13 is reduced). Β is the shallowest). Similarly, the lateral rib 16 at the lowest position is also continuously formed in the formation region of the first reinforcing panel 21, and the width α thereof is exactly the same as that of the lateral rib 13.
[0039]
Of the four lateral ribs 13, 14, 15, 16 as shown in FIG. 7 (c), the depth of the first reinforcing panel 21 is determined at the formation position of the lateral rib 14 at the second position from the top. The depth δ is deeper than the depth β of the concave groove of the lateral rib 14. Therefore, as shown in FIG. 1, while the depth β of the recessed groove of the lateral rib 14 is deeper than the depth δ of the first reinforcing panel 21 from the edge of the first reinforcing panel 21 toward the center, the lateral rib 14 When the depth of the first reinforcing panel 21 is deeper than the depth β of the concave groove of the lateral rib 14, The rib 14 has completely disappeared. However, in the formation region of the first reinforcing panel 21, the reinforcing ribs are formed continuously with the lateral ribs 14 by the first reinforcing panel 21. Similarly, the lateral rib 13 located at the third position from the top also has the depth of the lateral rib 13 continuously reduced from the edge of the first reinforcing panel 21 in the region where the first reinforcing panel 21 is formed. This lateral rib 13 disappears completely at the part, but the reinforcing rib is formed continuously with the lateral rib 13 by cooperation with the first reinforcing panel 21 and the first reinforcing panel 21 alone. .
[0040]
The maximum vertical length ε of the elliptical first reinforcing panel 21 is preferably about 5% to 90% of the vertical length of the upper portion 10, and preferably 10% to 50%. Further, the maximum circumferential length ζ of the first reinforcing panel 21 is preferably about 5% to 40% of the vertical length of the upper portion 10, and preferably 10% to 30%.
[0041]
In this way, by providing the first reinforcing panel 21 that gradually becomes deeper from the peripheral edge toward the center and continues to the lateral ribs 13, 14, 15, 16 when the synthetic resin casing 1 is held or synthesized. When a vertical force is applied to the reinforcing panel installation surface of the synthetic resin casing 1 during the transport of the resin casing 1, the vertical force is dispersed by the first reinforcing panel 21. The edge force (concentrated load) generated at the corner between the outer surface and the reinforcing panel is not generated, and as a result, the deformation of the synthetic resin casing 1 due to the vertical force is prevented. In addition, since a finger such as a thumb holding the synthetic resin casing 1 accurately fits into the recess of the first reinforcing panel 21, the synthetic resin casing 1 can be easily held, and the synthetic resin casing can be easily held. When the filling in 1 is poured out, the filling can be poured out in a stable state.
[0042]
In the example shown in FIG. 1, one first reinforcing panel 21 composed of a relatively large elliptical concave portion is provided. However, the first reinforcing panel 21 is shortened in the circumferential direction so that the first reinforcing panel 21 is provided. A predetermined number of panels 21 may be provided in the circumferential direction. Moreover, although the 1st reinforcement panel 21 is provided so that it may relate to all the four horizontal ribs 13, 14, 15, and 16, the 1st reinforcement panel 21 may be related to arbitrary number of horizontal ribs. It can also be. Furthermore, the shape of the first reinforcing panel 21 can be formed in various shapes such as a circular shape and an oval shape in addition to the elliptical shape.
[0043]
A reinforcing rib 22 extending in the circumferential direction is formed above the first reinforcing panel 21. The reinforcing rib 22 is formed as a truncated pyramid-shaped recess. Although not shown, the reinforcing ribs 22 are also formed on the back surface of the synthetic resin casing 1. And the extension part of the plane part of the upper part 10 above the 1st reinforcement panel 21 is reinforced by this horizontal direction rib 22, and this part becomes difficult to deform | transform.
[0044]
Further, as shown in FIGS. 1 and 2, second and third reinforcing panels 23 and 24 are respectively formed on the front surface and the left side surface of the lower portion 11 of the body portion 4. Although not shown, these second and third reinforcing panels 23 and 24 are also formed on the back surface and the right side surface of the lower portion 11, respectively. The second reinforcing panel 23 is recessed from the outer surface of the lower portion 11 as shown in FIG. 8, and is formed in a rectangular shape with rounded corners as is apparent from FIG. This 2nd reinforcement panel 23 consists of the upper side uneven | corrugated strip part 25, the lower side uneven | corrugated strip part 26, and the recessed part 27 extended in the circumferential direction formed between these upper and lower side uneven | corrugated strip parts 25 and 26. As shown in FIG. .
[0045]
The upper-side concavo-convex ridge portion 25 includes a predetermined number of concavo-convex ridges that extend in the vertical direction and is repeatedly arranged in the circumferential direction, and as shown in FIG. The shape is formed as a corrugated panel having a triangular wave shape.
[0046]
The depth η of the concaves and convexes of these ridges is 0.3 mm for the thickness of the lower part 11, 385 mm for the entire circumference of the lower part 11, 75.38 mm for the circumferential length of the flat part on the long side of the lower part 11, and 11 for the lower part 11. When the circumferential length of the flat portion on the short side is 52.86 mm and the vertical length of the lower portion 11 is 99 mm, the outer surface of the lower portion 11 is preferably about 2 mm to 10 mm, and preferably 2 mm to 5 mm. Further, the depth κ of the convex portion of the concave and convex stripes is preferably about 0.2 mm to 8 mm from the outer surface of the lower portion 11, and preferably 0.5 mm to 3 mm. Furthermore, the width (ie, the pitch of the triangular wave) λ of one ridge is preferably about 2 to 10 mm, and preferably 3 to 6 mm. Furthermore, the angle θ of the triangular wave of the ridges and grooves is preferably about 20 ° to 120 °, and preferably 30 ° to 90 °. These numerical values also depend on the characteristics of the material of the bottle, are values obtained from experience values in the test, and are absolute values that are not related to the size of the bottle.
[0047]
The lower-side uneven stripe portion 26 is formed symmetrically with the upper-side uneven stripe portion 25 in the vertical direction, and the unevenness is the same as the unevenness of the upper-side uneven stripe portion 25 and aligned in the vertical direction. Since only the difference is the same as the upper side uneven strip 25, the description thereof is omitted.
[0048]
The concave portion 27 is formed as a concave portion having a truncated pyramid shape with a quadrangular cross section that decreases in cross section as the depth increases, and is formed deepest in the second reinforcing panel 23.
[0049]
The width μ of the recess 27 is preferably about 2 mm to 10 mm, and preferably 3 mm to 7 mm. Further, the depth ν of the concave portion 27 from the outer surface of the lower portion 11 is preferably about 2.2 mm to 15 mm, and preferably 2.5 mm to 13 mm. The depth η of the recess 27 needs to be set deeper than the depth η of the recess. In this case, the depth ξ of the recess 27 from the bottom of the recess of the upper-side uneven strip 25 is preferably about 0.2 mm to 5 mm, and preferably is about 0.5 mm. 5 mm to 3 mm is preferable (that is, ν = η + ξ). These numerical values also depend on the characteristics of the material of the bottle, are values obtained from experience values in the test, and are absolute values that are not related to the size of the bottle.
[0050]
Further, the third reinforcing panel 24 formed on the left and right side surfaces of the synthetic resin casing 1 has an upper portion 28, a lower portion 29, and a second reinforcing panel 23, as shown in FIG. It is composed of lateral ribs 30 and is short in the circumferential direction with respect to the second reinforcing panel 23 and has only a small number of ridges and recesses, and the others are formed exactly the same. Description is omitted.
[0051]
By providing the second and third reinforcing panels 23 and 24 in this way, one concave portion 27 is formed between the upper-side uneven strip portion 25 and the lower-side uneven strip portion 26, so that the lower portion of the trunk portion 4 is formed. 11 has flexibility with respect to pressure reduction and pressurization in the synthetic resin casing 1. Thereby, the lower part 11 of the trunk | drum 4 is reinforced by the upper side uneven | corrugated strip part 25 and the lower side uneven | corrugated strip part 26, and the state where it pecked is prevented, and also the lower part 11 in the synthetic resin casing 1 is prevented by the recessed part 27. It becomes flexible against depressurization and pressurization, and it becomes difficult to be crushed, and it is possible to more reliably prevent the lower portion 11 from being crushed by a certain pressure or more than a conventional synthetic resin casing. . Further, the recess 27 functions as a lateral rib to improve the strength of the lower portion 11.
[0052]
Moreover, in the lower part 11 of the trunk | drum 4, although the pressure by the dead weight of the synthetic resin housing 1 is high, the pressing force by this pressure is directed from the inside of the synthetic resin housing 1 to the outside. Even if added, the second and third reinforcing panels 23 and 24 can prevent the deformation of the swelling of the lower portion 11 as in the case of a conventional synthetic resin casing.
[0053]
Further, reinforcing ribs 31 and 32 extending in the circumferential direction are formed on the front surface and the left side surface of the lower portion 11, respectively. These reinforcing ribs 31 and 32 are set so that the width thereof is narrower than the width of the concave portions 27 and 30 of the second and third reinforcing panels 23 and 24, but the circumferential length thereof is that of the concave portions 27 and 30. It is set longer than the circumferential length. These reinforcing ribs 31 and 32 are formed as concave portions having a truncated pyramid shape like the reinforcing rib 22. Although not shown, these reinforcing ribs 31 and 32 are also formed on the back surface and the right side surface of the synthetic resin casing 1, respectively. The portions between the second and second reinforcing panels 23 and 24 and the lateral rib 12 are reinforced by these reinforcing ribs 31 and 32, and these portions are not easily deformed.
[0054]
Further, as shown in FIGS. 1 and 2, the lateral rib 12 is formed from an upper 10 side slope side wall 12a, a lower 11 side slope side wall 12b, and a bottom portion 12c between these slope side wall sidewalls 12a and 12b. At the same time, the cross section is formed in a trapezoidal recess, and is formed on the entire circumference of the synthetic resin casing 1. The bottom portion 12c of the concave portion of the lateral rib 12 is prevented from being crushed by a widened portion whose width is larger than the constant width π of the other portions at the center portions of the front and left sides of the synthetic resin casing 1 respectively. The rib portions 33 and 34 are formed, and as is apparent from FIG. 10A, the crush prevention rib portion 33 is formed in a symmetrical rhombus shape at the center, and its width is the crush prevention rib. It is set so as to gradually widen from the left and right ends of the portion 33 toward the center and to have a maximum width ρ at the center.
[0055]
The width π of the normal portion of the bottom portion 12c of the lateral rib 12 is preferably about 2 mm to 10 mm, and preferably 3 mm to 7 mm, with respect to the dimensions of the upper portion 10 and the lower portion 11 described above. Further, the maximum width ρ of the crush prevention rib portion 33 of the bottom portion 12c of the lateral rib 12 is preferably about 1.2 to 3 times the width π of the normal portion, and preferably 1.5 to 2 times. Furthermore, the expansion angle θ ′ of the crush prevention rib portion 33 is preferably about 2 ° to 90 °, and preferably 5 ° to 50 °. These numerical values also depend on the characteristics of the material of the bottle, are values obtained from experience values in the test, and are absolute values that are not related to the size of the bottle.
[0056]
In the formation region of the crush prevention rib portion 33, the inclination of the upper 10 side slope side wall 12a and the lower 11 side slope side wall 12b continuously changes from the end of the crush prevention rib portion 33 toward the center from the gentle slope to the steep slope. is doing. Further, since the crushing prevention rib portion 34 formed on the left side surface of the synthetic resin casing 1 is also formed in the same shape as the crushing prevention rib portion 33, description thereof is omitted. Furthermore, these crush prevention rib parts 33 and 34 are also formed on the back surface and the right side surface of the lateral rib 12 of the synthetic resin casing 1, respectively. Note that a plurality of the crush prevention rib portions 33 and 34 can be provided on each surface. In addition, the crushing prevention rib portions 34 formed on the left and right side surfaces of the lateral rib 12 of the synthetic resin casing 1 may cause the lateral rib 12 to be crushed and deformed by the holding force when the synthetic resin casing 1 is held. If there is no, it can be omitted. Furthermore, the shape of the crush prevention ribs 33 and 34 can be formed in an elliptical shape as shown in FIG. 11A or an oval shape as shown in FIG.
[0057]
Thus, by providing the crush prevention rib parts 33 and 34 in the bottom part 12c of the horizontal direction rib 12, it comes to have flexibility with respect to the holding pressure (pressing pressure) of the synthetic resin casing 1. As a result, when the synthetic resin casing 1 is held, the central portion of the body portion 4 that is most easily deformed, the central portion of the synthetic resin casing 1 exhibits flexibility with respect to the holding pressure and is not easily crushed. Can be more reliably prevented compared to conventional synthetic resin casings.
[0058]
Actually, using polyethylene terephthalate, the thickness is 0.3 mm, the height is 305 mm, the entire circumference of the upper part 10 of the trunk part 4 is 373 mm and the height is 70 mm, and the entire circumference of the lower part 11 of the trunk part 4 is 385 mm and the height. 99 mm, the width α of the four lateral ribs 13, 14, 15, 16 is 7 mm, the depth β is 2.5 mm, and the length γ of the crush prevention ribs 17, 18, 19, 20 is 10 mm. The maximum vertical length ε of one reinforcing panel 21 is 62.0 mm, the maximum circumferential length ζ of the first reinforcing panel 21 is 40.0 mm, the circumferential length of the circumferential reinforcing rib 22 is 30.0 mm, and The width of 5.0 mm, the depth of the reinforcing rib 22 is 2.5 mm, the circumferential length of the reinforcing rib 31 is 60.0 mm and the width is 5.0 mm, the depth of the reinforcing rib 31 is 2.5 mm, and the circumferential reinforcing rib. 32 circumferential length 35.0mm and width 5.0mm, complementary The depth of the strong rib 31 is 2.5 mm, the width of the lateral rib 12 between the upper portion 10 and the lower portion 11 of the body 4 is 15.5 mm, and the upper portion of the lateral rib 12 on the left and right side surfaces of the synthetic resin casing 1 A depth of 3.5 mm from the outer surface of 10 and a depth of 2.5 mm from the outer surface of the upper portion 10 of the lateral rib 12 on the front and back of the synthetic resin casing 1, and a normal portion of the bottom portion 12 c of the lateral rib 12. The width π is 5.00 mm, the entire circumference of the bottom portion 12c is 349 mm, the maximum width ρ of the crush prevention rib portion 33 is 9.00 mm, the circumferential length of the widened portion is 40.00 mm, and the maximum width of the crush prevention rib portion 34 ρ is 9.00 mm, the circumferential length of the widened portion is 30.00 mm, the circumferential length of the second reinforcing panel 23 is 50.00 mm, the vertical length is 77.00 mm, the upper side uneven portion 25 and Length 42.0 in the circumferential direction of the lower-side uneven strip 26 mm, the length in the vertical direction is 34.00 mm, the width λ of one of the ridges 25 and 26 is 6.00 mm, the width of the recess 27 is 9.00 mm, the circumferential length is 50.00 mm, and third reinforcement The circumferential length of the panel 24 is 30.00 mm, the vertical length is 77.00 mm, the circumferential length of the upper side uneven portion 28 and the lower side uneven portion 29 is 24.00 mm, and the vertical length. 34.00 mm, the width λ of one of the ridges 28 and 29 is 6.00 mm, the width of the recess 30 is 9.00 mm and the circumferential length is 30.00 mm, the width of the lateral rib 5 is 7.00 mm, the mouth The synthetic resin housing 1 of the present invention having the shape shown in FIGS. 1 to 3 and comprising a length 20.00 mm in the vertical direction of the portion 2 and the shoulder 3 and a length 33.5 mm in the vertical direction at the bottom, and the lateral direction Ribs 13, 14, 15, 16 are continuously formed on the left and right sides and crushed The anti-slip rib portion is not formed, and the others are respectively made of the synthetic resin housing 1 formed in the same manner as the synthetic resin housing 1 of the present invention having the anti-smashing rib portions 17, 18, 19, and 20, respectively. As a result of the first pressing test by pressing a disc of φ10 mm against the crush prevention rib portion and the portion corresponding to the crush prevention rib portion using these synthetic resin casings 1, the results shown in Table 1 were obtained. It was.
[0059]
[Table 1]
Figure 0003982651
[0060]
As is apparent from Table 1, the pressing pressure at which the synthetic resin casing 1 is crushed is 5.5 kg · f in any synthetic resin casing 1, and at this time, the lateral ribs 13, 14, The amount of deformation until collapse of the synthetic resin casing with the crush prevention ribs 15 and 16 is 10 mm, and the amount of deformation until collapse of the synthetic resin casing without the crush prevention ribs is 5 mm. It was found that the synthetic resin casing 1 with the portions 17, 18, 19, and 20 was twice as large as the synthetic resin casing 1 without the crush prevention rib portion. That is, the crushing prevention rib portions 17, 18, 19, and 20 of the lateral ribs 13, 14, 15, and 16 make the synthetic resin casing 1 more flexible and difficult to crush. As a result, the synthetic resin case 1 of the present invention is made of the synthetic resin. It was found that the casing 1 can more reliably prevent crushing than the conventional synthetic resin casing 1.
[0061]
In addition, the synthetic resin casing 1 exactly the same as the synthetic resin casing 1 of the present invention used in the first pressing test described above is produced, and the lateral ribs 13, 14, 15, 16 are continuously formed in the circumferential direction, and the others are respectively made of synthetic resin casings 1 formed in the same manner as the synthetic resin casing 1 of the present invention having the first reinforcing panel 21. As a result of performing a second pressing test by pressing a disk of φ10 mm against the reinforcing panel surface and a portion corresponding to the reinforcing panel surface using the synthetic resin casing 1, the results shown in Table 2 were obtained. .
[0062]
[Table 2]
Figure 0003982651
[0063]
As is clear from Table 2, the pressing pressure at which the synthetic resin casing 1 is crushed is 2.5 kg / f for the synthetic resin casing 1 with the first reinforcing panel 21 and the first reinforcing panel 21. It was found that the synthetic resin casing 1 having no reinforcing member is 2.0 kg · f, and the pressing pressure at which the crushing occurs is larger in the synthetic resin casing 1 having the first reinforcing panel 21. In other words, the first reinforcing panel 21 improves the pressing force at which crushing occurs, and the strength against the pressing force of the synthetic resin casing 1 having the first reinforcing panel 21 increases. In addition, the pushed distance until crushing is 6 mm for the synthetic resin casing 1 with the first reinforcing panel 21 and 3 mm for the synthetic resin casing 1 without the first reinforcing panel 21. It was found that the synthetic resin casing 1 with the one reinforcing panel 21 is twice as long as the synthetic resin casing 1 without the first reinforcing panel 21. That is, the first reinforcing panel 21 increases the pushing distance until the occurrence of crushing, and the flexibility is improved and the crushing deformation of the synthetic resin casing 1 having the first reinforcing panel 21 is reduced. It turned out that it can prevent more reliably compared with the synthetic resin casing 1.
[0064]
Further, the synthetic resin casing 1 exactly the same as the synthetic resin casing 1 of the present invention used in the first pressing test described above is manufactured, and there are no crush prevention rib portions 33 and 34, and the others are the crush prevention ribs. Synthetic resin casings 1 that are formed in exactly the same manner as the synthetic resin casing 1 of the present invention having the portions 33 and 34, respectively, and using these synthetic resin casings 1, a φ10 mm disc is crushed to prevent ribs The result shown in Table 3 was obtained as a result of the third pressing test by pressing against the portions 33 and 34 and the portion corresponding to the crush prevention rib portion.
[0065]
[Table 3]
Figure 0003982651
[0066]
As is apparent from Table 3, the pressure at which the plastic resin casing 1 is crushed is 3.5 kg / f in the synthetic resin casing 1 having the crush prevention rib portions 33 and 34 and the crush prevention rib. The synthetic resin casing 1 without the portions 33 and 34 is 2.5 kg · f, and the pressing pressure at which the crushing occurs is larger in the synthetic resin casing 1 having the crush prevention rib portions 33 and 34. I understood. That is, the crushing prevention ribs 33 and 34 improve the pressing pressure at which crushing occurs, and the strength against the pressing pressure of the synthetic resin casing 1 having the crushing prevention ribs 33 and 34 increases. In addition, the pressed distance until the crushing occurs is 8 mm for the synthetic resin casing 1 having the crush prevention rib portions 33 and 34 and 4 mm for the synthetic resin casing 1 having no crush prevention rib portions 33 and 34. Thus, it was found that the synthetic resin casing 1 with the crush prevention rib portions 33 and 34 is twice as long as the synthetic resin casing 1 without the crush prevention rib portions 33 and 34. That is, the crushing prevention ribs 33 and 34 increase the pushing distance until the crushing occurs and the flexibility is improved so that the crushing prevention ribs 33 and 34 are difficult to crush. It was found that the crushing deformation can be prevented more reliably than the conventional synthetic resin casing 1.
[0067]
【The invention's effect】
As is apparent from the above description, according to the synthetic resin casing of the present invention, the synthetic resin can be obtained by appropriately combining some or all of the reinforcing panel, the lateral rib, the reinforcing rib portion, and the flexibility imparting portion. While increasing the strength of the casing, the synthetic resin casing can be made flexible and the force applied to the synthetic resin casing can be dispersed. As a result, the external force applied to the synthetic resin casing, the holding pressure of the casing, the decompression or pressurization in the synthetic resin casing, or the pressurization by the weight of the filler in the synthetic resin casing is made. Crushing deformation that does not restore the casing can be prevented more effectively.
[0068]
Therefore, liquid filling such as hot fill and cold fill can be surely dealt with in a wide range of applications, the appearance can be prevented from being damaged, and the commercial value can be prevented from being lowered.
[Brief description of the drawings]
FIG. 1 is a front view showing an example of an embodiment of a synthetic resin casing according to the present invention, FIG. 2 is a left side view of this example, and FIG. 3 is a plan view.
FIG. 2 is a left side view of the synthetic resin casing of the example shown in FIG.
3 is a plan view of the synthetic resin casing of the example shown in FIG. 1. FIG.
4 is a partially enlarged view partially showing a lateral rib of the synthetic resin casing of the example shown in FIG. 1. FIG.
5 is a cross-sectional view taken along line VV in FIG.
6 is a cross-sectional view taken along the line VI-VI in FIG.
7 shows a first reinforcing panel of the synthetic resin casing of the example shown in FIG. 1, wherein (a) is a sectional view taken along line VIIA-VIIA in FIG. 1, and (b) is a line VIIB-VIIB in FIG. (C) is sectional drawing which follows the VIIC-VIIC line | wire in FIG.
8 is a cross-sectional view taken along line VIII-VIII in FIG.
9 shows a second reinforcing panel of the synthetic resin casing of the example shown in FIG. 1, (a) is a sectional view taken along line IXA-IXA in FIG. 1, and (b) is a line IXB-IXB in FIG. FIG.
10 shows a crush prevention rib of the synthetic resin casing of the example shown in FIG. 1, (a) is a partially enlarged view, and (b) is a cross-sectional view taken along line XB-XB in (a).
11 (a) is a view similar to FIG. 10 (a) showing another example of the collapse prevention rib of the synthetic resin casing of the example shown in FIG. 1, and FIG. 11 (b) is still another example of the collapse prevention rib. It is a figure similar to Fig.10 (a) which shows an example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Synthetic resin housing, 2 ... Mouth part, 3 ... Shoulder part, 4 ... Trunk part, 5 ... Lateral rib, 6 ... Bottom part, 10 ... Upper part, 11 ... Lower part, 12 ... Lateral rib, 13, 14 , 15, 16 ... transverse ribs, 17, 18, 19, 20 ... discontinuous parts, 21 ... first reinforcing panel, 23 ... second reinforcing panel, 24 ... third reinforcing panel, 25, 28 ... upper side irregularities Part, 26, 29 ... lower side uneven protrusion, 27, 30 ... concave part, 33, 34 ... crush prevention rib part

Claims (15)

口部と、この口部に連続する肩部と、この肩部に連続する胴部と、この胴部に連続する底部とからなり、これらの各部が合成樹脂によって一体に成形された合成樹脂製壜体において、
前記胴部の上部に、周方向に延びる凹溝からなる所定数の横方向リブが形成されているとともに、この横方向リブが形成される領域の一部分の領域に、前記横方向リブの凹溝に連続する所定形状の凹部からなる第１の補強パネルが形成されており、
この第１の補強パネルの凹部の深さがこの凹部の縁から中央に向かって徐々にかつ連続して深くなるとともに、前記凹部の深さが、この凹部の縁付近では前記横方向リブの凹溝の深さより浅く設定されているとともに、前記凹部の中央部付近では前記横方向リブの凹溝の深さより深く設定されており、
前記胴部の下部に、上下方向に延びる上部側凹凸条部と、この上部側凹凸条部の下に設けられた上下方向に延びる下部側凹凸条部と、これらの上、下部側凹凸条部の間に設けられた周方向に延びる凹部とからなる第２の補強パネルが形成されていることを特徴とする合成樹脂製壜体。（図１の符号１３〜１６,２１；２３,２５〜２７の部分に対応）It is made of a synthetic resin, which is composed of a mouth portion, a shoulder portion that continues to the mouth portion, a trunk portion that continues to the shoulder portion, and a bottom portion that continues to the trunk portion. In the enclosure,
A predetermined number of lateral ribs composed of grooves extending in the circumferential direction are formed on the upper portion of the body portion, and the grooves of the lateral ribs are formed in a part of the region where the lateral ribs are formed. A first reinforcing panel made of a concave portion of a predetermined shape is formed,
The depth of the concave portion of the first reinforcing panel gradually and continuously increases from the edge of the concave portion toward the center, and the depth of the concave portion is a concave portion of the lateral rib near the edge of the concave portion. It is set shallower than the depth of the groove, and is set deeper than the depth of the concave groove of the lateral rib near the center of the concave portion,
An upper side uneven strip extending in the vertical direction at the lower part of the body portion, a lower side uneven strip extending in the vertical direction provided below the upper side uneven strip, and the upper and lower side uneven strips above these A synthetic resin casing comprising a second reinforcing panel formed of a recess extending in the circumferential direction provided therebetween. (Corresponding to reference numerals 13 to 16, 21; 23, 25 to 27 in FIG. 1) 前記胴部の上部と下部との間に第２の横方向リブが形成されているとともに、この第２の横方向リブは、上下の傾斜側面部とこれらの傾斜側面部の間に位置する底部とからなる、断面が胴部の外面から深くなるにしたがって狭くなる台形状に形成されており、
前記第２の横方向リブの一部に、前記底部の幅が前記第２の横方向リブの他部における底部の幅より広くかつ周方向に延びる拡幅部からなる補強リブ部が形成されているとともに、この補強リブ部の拡幅部はその周方向両端から中央に向かって徐々に広くなって中央で最大となるように設定されていることを特徴とする請求項１記載の合成樹脂製壜体。（請求項１＋図１の符号１２,３３,図１０の符号１２ａ〜１２ｃの部分に対応）A second lateral rib is formed between an upper portion and a lower portion of the body portion, and the second lateral rib is a bottom portion located between the upper and lower inclined side portions and the inclined side portions. It is formed in a trapezoidal shape that becomes narrower as the cross section becomes deeper from the outer surface of the body part,
A reinforcing rib portion is formed in a part of the second lateral rib, and includes a widened portion having a width that is wider than a bottom portion of the other portion of the second lateral rib and that extends in the circumferential direction. The synthetic resin casing according to claim 1, wherein the widened portion of the reinforcing rib portion is set so as to be gradually widened from both circumferential ends toward the center and maximized at the center. . (Claim 1 + corresponding to reference numerals 12, 33 in FIG. 1 and reference numerals 12a to 12c in FIG. 10) 口部と、この口部に連続する肩部と、この肩部に連続する胴部と、この胴部に連続する底部とからなり、これらの各部が合成樹脂によって一体に成形された合成樹脂製壜体において、
前記胴部の上部に、周方向に延びる凹溝からなる所定数の横方向リブが形成されているとともに、この横方向リブが形成される領域の一部分の領域に、前記横方向リブの凹溝に連続する所定形状の凹部からなる補強パネルが形成されており、
この補強パネルの凹部の深さがこの凹部の縁から中央に向かって徐々にかつ連続して深くなるとともに、前記凹部の深さが、この凹部の縁付近では前記横方向リブの凹溝の深さより浅く設定されているとともに、前記凹部の中央部付近では前記横方向リブの凹溝の深さより深く設定されており、
前記胴部の上部と下部との間に第２の横方向リブが形成されているとともに、この第２の横方向リブは、上下の傾斜側面部とこれらの傾斜側面部の間に位置する底部とからなる、断面が胴部の外面から深くなるにしたがって狭くなる台形状に形成されており、
前記第２の横方向リブの一部に、前記底部の幅が前記第２の横方向リブの他部における底部の幅より広くかつ周方向に延びる拡幅部からなる補強リブ部が形成されているとともに、この補強リブ部の拡幅部はその周方向両端から中央に向かって徐々に広くなって中央で最大となるように設定されていることを特徴とする合成樹脂製壜体。（図１の符号１３〜１６,２１；１２,３３の部分に対応）It is made of a synthetic resin, which is composed of a mouth portion, a shoulder portion that continues to the mouth portion, a trunk portion that continues to the shoulder portion, and a bottom portion that continues to the trunk portion. In the enclosure,
A predetermined number of lateral ribs composed of grooves extending in the circumferential direction are formed on the upper portion of the body portion, and the grooves of the lateral ribs are formed in a part of the region where the lateral ribs are formed. A reinforcing panel consisting of a concave portion of a predetermined shape is formed,
The depth of the concave portion of the reinforcing panel gradually and continuously increases from the edge of the concave portion toward the center, and the depth of the concave portion is the depth of the concave groove of the lateral rib near the edge of the concave portion. And is set deeper than the depth of the groove of the lateral rib near the center of the recess,
A second lateral rib is formed between an upper portion and a lower portion of the body portion, and the second lateral rib is a bottom portion located between the upper and lower inclined side portions and the inclined side portions. It is formed in a trapezoidal shape that becomes narrower as the cross section becomes deeper from the outer surface of the body part,
A reinforcing rib portion is formed in a part of the second lateral rib, and includes a widened portion having a width that is wider than a bottom portion of the other portion of the second lateral rib and that extends in the circumferential direction. And the wide part of this reinforcement rib part is set so that it may become wide gradually toward the center from the circumferential direction both ends, and may become the maximum in the center, The synthetic resin casing characterized by the above-mentioned. (Corresponding to reference numerals 13 to 16, 21; 12, 33 in FIG. 1) 前記横方向リブは複数形成されており、
それらの複数の横方向リブのうち、一部の横方向リブは、前記補強パネルの凹部の深さが前記横方向リブの凹溝の深さより浅い領域に形成されていて、この領域の部分の横方向リブの深さは、前記補強パネルの凹部の深さが深くなるにしたがって徐々に浅くなっており、
前記複数の横方向リブのうち、他の横方向リブは、前記補強パネルの凹部の深さが前記横方向リブの凹溝の深さより浅い領域および前記補強パネルの凹部の深さが前記横方向リブの凹溝の深さより深い領域にまたがって形成されていて、前記他の横方向リブが、前記補強パネルの凹部の深さが前記横方向リブの凹溝の深さより浅い領域では形成されるが、前記補強パネルの凹部の深さが前記横方向リブの凹溝の深さより深い領域では消滅することを特徴とする請求項１ないし３のいずれか１記載の合成樹脂製壜体。（請求項１,２ｏｒ３＋図７の符号２１の具体的特徴部分に対応）A plurality of the lateral ribs are formed,
Among the plurality of lateral ribs, some of the lateral ribs are formed in a region where the depth of the recessed portion of the reinforcing panel is shallower than the depth of the recessed groove of the lateral direction rib. The depth of the lateral rib is gradually shallower as the depth of the concave portion of the reinforcing panel is increased,
Among the plurality of lateral ribs, the other lateral ribs include a region where the depth of the concave portion of the reinforcing panel is shallower than the depth of the concave groove of the lateral rib and the depth of the concave portion of the reinforcing panel is the lateral direction. The other lateral rib is formed in a region where the depth of the concave portion of the reinforcing panel is shallower than the depth of the concave groove of the lateral rib. However, the synthetic resin casing according to any one of claims 1 to 3, wherein the depth of the concave portion of the reinforcing panel disappears in a region deeper than the depth of the concave groove of the lateral rib. (Claims 1, 2 or 3 + corresponding to the specific features of reference numeral 21 in FIG. 7) 口部と、この口部に連続する肩部と、この肩部に連続する胴部と、この胴部に連続する底部とからなり、これらの各部が合成樹脂によって一体に成形された合成樹脂製壜体において、
前記胴部の上部と下部との間に第２の横方向リブが形成されているとともに、この第２の横方向リブは、上下の傾斜側面部とこれらの傾斜側面部の間に位置する底部とからなる、断面が胴部の外面から深くなるにしたがって狭くなる台形状に形成されており、
前記第２の横方向リブの一部に、前記底部の幅が前記第２の横方向リブの他部における底部の幅より広くかつ周方向に延びる拡幅部からなる補強リブ部が形成されているとともに、この補強リブ部の拡幅部はその周方向両端から中央に向かって徐々に広くなって中央で最大となるように設定されており、
前記胴部の下部に、上下方向に延びる上部側凹凸条部と、この上部側凹凸条部の下に下部側凹凸条部と、これらの上、下部側凹凸条部の間に周方向に延びる凹部とからなる補強パネルが形成されていることを特徴とする合成樹脂製壜体。（図１の符号１２,３３；２３,２５〜２７の部分に対応）It is made of a synthetic resin, which is composed of a mouth portion, a shoulder portion that continues to the mouth portion, a trunk portion that continues to the shoulder portion, and a bottom portion that continues to the trunk portion. In the enclosure,
A second lateral rib is formed between an upper portion and a lower portion of the body portion, and the second lateral rib is a bottom portion located between the upper and lower inclined side portions and the inclined side portions. It is formed in a trapezoidal shape that becomes narrower as the cross section becomes deeper from the outer surface of the body part,
A reinforcing rib portion is formed in a part of the second lateral rib, and includes a widened portion having a width that is wider than a bottom portion of the other portion of the second lateral rib and that extends in the circumferential direction. In addition, the widened portion of the reinforcing rib portion is set so as to gradually widen from the circumferential direction both ends toward the center and to become the maximum in the center.
An upper side uneven strip extending in the vertical direction at the lower part of the body portion, a lower side uneven strip extending below the upper side uneven strip, and a circumferential extension between the upper and lower side uneven strips. A synthetic resin casing characterized in that a reinforcing panel comprising recesses is formed. (Corresponding to reference numerals 12, 33; 23, 25 to 27 in FIG. 1) 前記上部側凹凸条部と前記下部側凹凸条部とは同数かつ上下に整列されて形成されていることを特徴とする請求項１、２および５のいずれか１記載の合成樹脂製壜体。（請求項４は入りません；請求項１,２ｏｒ５＋図１の符号２５,２６の具体的特徴の部分に対応）The synthetic resin casing according to any one of claims 1, 2, and 5, wherein the upper-side uneven ridges and the lower-side uneven ridges are formed in the same number and vertically aligned. (Claim 4 is not included; claims 1, 2 or 5 + corresponding to specific features of reference numerals 25 and 26 in FIG. 1) 口部と、この口部に連続する肩部と、この肩部に連続する胴部と、この胴部に連続する底部とからなり、これらの各部が合成樹脂によって一体に成形された合成樹脂製壜体において、
前記胴部の上部に、周方向に延びる凹溝からなる所定数の横方向リブが形成されているとともに、この横方向リブの一部分において前記凹溝が消滅した不連続部からなる柔軟性付与部が形成されており、
前記胴部の下部に、上下方向に延びる上部側凹凸条部と、この上部側凹凸条部の下に下部側凹凸条部と、これらの上、下部側凹凸条部の間に周方向に延びる凹部が形成されていることを特徴とする合成樹脂製壜体。（図２の符号１３〜２０；２４,２８〜３０の部分に対応）It is made of a synthetic resin, which is composed of a mouth portion, a shoulder portion that continues to the mouth portion, a trunk portion that continues to the shoulder portion, and a bottom portion that continues to the trunk portion. In the enclosure,
A predetermined number of lateral ribs made of grooves extending in the circumferential direction are formed on the upper portion of the body part, and a flexibility imparting part made of a discontinuous part in which the grooves have disappeared in a part of the lateral ribs Is formed,
An upper side uneven strip extending in the vertical direction at the lower part of the body portion, a lower side uneven strip extending below the upper side uneven strip, and a circumferential extension between the upper and lower side uneven strips. A synthetic resin casing having a recess. (Corresponding to reference numerals 13 to 20; 24, 28 to 30 in FIG. 2) 前記胴部の上部と下部との間に第２の横方向リブが形成されているとともに、この第２の横方向リブは、上下の傾斜側面部とこれらの傾斜側面部の間に位置する底部とからなる、断面が胴部の外面から深くなるにしたがって狭くなる台形状に形成されており、
前記第２の横方向リブの一部に、前記底部の幅が前記第２の横方向リブの他部における底部の幅より広くかつ周方向に延びる拡幅部からなる補強リブ部が形成されているとともに、この補強リブ部の拡幅部はその周方向両端から中央に向かって徐々に広くなって中央で最大となるように設定されていることを特徴とする請求項７記載の合成樹脂製壜体。（請求項７＋図２の符号１２,３４の部分に対応）A second lateral rib is formed between an upper portion and a lower portion of the body portion, and the second lateral rib is a bottom portion located between the upper and lower inclined side portions and the inclined side portions. It is formed in a trapezoidal shape that becomes narrower as the cross section becomes deeper from the outer surface of the body part,
A reinforcing rib portion is formed in a part of the second lateral rib, and includes a widened portion having a width that is wider than a bottom portion of the other portion of the second lateral rib and that extends in the circumferential direction. The widened portion of the reinforcing rib portion is set so as to gradually widen from both ends in the circumferential direction toward the center and maximize at the center. . (Claim 7 + corresponding to reference numerals 12 and 34 in FIG. 2) 口部と、この口部に連続する肩部と、この肩部に連続する胴部と、この胴部に連続する底部とからなり、これらの各部が合成樹脂によって一体に成形された合成樹脂製壜体において、
前記胴部の上部に、周方向に延びる凹溝からなる所定数の横方向リブが形成されているとともに、この横方向リブの一部分において前記凹溝が消滅した不連続部からなる柔軟性付与部が形成されており、
前記胴部の上部と下部との間に第２の横方向リブが形成されているとともに、この第２の横方向リブは、上下の傾斜側面部とこれらの傾斜側面部の間に位置する底部とからなる、断面が胴部の外面から深くなるにしたがって狭くなる台形状に形成されており、
前記第２の横方向リブの一部に、前記底部の幅が前記第２の横方向リブの他部における底部の幅より広くかつ周方向に延びる拡幅部からなる補強リブ部が形成されているとともに、この補強リブ部の拡幅部はその周方向両端から中央に向かって徐々に広くなって中央で最大となるように設定されていることを特徴とする合成樹脂製壜体。（図２の符号１３〜２０；１２,３４の部分に対応）It is made of a synthetic resin, which is composed of a mouth portion, a shoulder portion that continues to the mouth portion, a trunk portion that continues to the shoulder portion, and a bottom portion that continues to the trunk portion. In the enclosure,
A predetermined number of lateral ribs made of grooves extending in the circumferential direction are formed on the upper portion of the body part, and a flexibility imparting part made of a discontinuous part in which the grooves have disappeared in a part of the lateral ribs Is formed,
A second lateral rib is formed between an upper portion and a lower portion of the body portion, and the second lateral rib is a bottom portion located between the upper and lower inclined side portions and the inclined side portions. It is formed in a trapezoidal shape that becomes narrower as the cross section becomes deeper from the outer surface of the body part,
A reinforcing rib portion is formed in a part of the second lateral rib, and includes a widened portion having a width that is wider than a bottom portion of the other portion of the second lateral rib and that extends in the circumferential direction. And the wide part of this reinforcement rib part is set so that it may become wide gradually toward the center from the circumferential direction both ends, and may become the maximum in the center, The synthetic resin casing characterized by the above-mentioned. (Corresponding to reference numerals 13 to 20; 12, 34 in FIG. 2) 口部と、この口部に連続する肩部と、この肩部に連続する横断面矩形状の胴部と、この胴部に連続する底部とからなり、これらの各部が合成樹脂によって一体に成形された合成樹脂製壜体において、
前記矩形状の胴部の長辺側および短辺側の上部に、周方向に延びる凹溝からなる所定数の横方向リブが形成されているとともに、この横方向リブが形成される長辺側の領域に、前記横方向リブの凹溝に連続する所定形状の凹部からなる補強パネルが形成されており、
この補強パネルの凹部の深さがこの凹部の縁から中央に向かって徐々にかつ連続して深くなるとともに、前記凹部の深さが、この凹部の縁付近では前記横方向リブの凹溝の深さより浅く設定されているとともに、前記凹部の中央部付近では前記横方向リブの凹溝の深さより深く設定されており、
前記胴部の短辺側の上部に形成されている前記横方向リブの一部分において前記凹溝が消滅した不連続部からなる柔軟性付与部が形成されていることを特徴とする合成樹脂製壜体。（図１の符号１３〜１６,２１；図２の１３〜２０の部分に対応）It consists of a mouth part, a shoulder part that continues to this mouth part, a trunk part that has a rectangular cross section that continues to this shoulder part, and a bottom part that continues to this trunk part, and these parts are integrally molded with synthetic resin In the made synthetic resin housing,
A predetermined number of lateral ribs made of concave grooves extending in the circumferential direction are formed on the long side and short side of the rectangular body, and the long side on which the lateral ribs are formed. In this area, a reinforcing panel made of a recessed portion of a predetermined shape continuing to the recessed groove of the lateral rib is formed,
The depth of the concave portion of the reinforcing panel gradually and continuously increases from the edge of the concave portion toward the center, and the depth of the concave portion is the depth of the concave groove of the lateral rib near the edge of the concave portion. And is set deeper than the depth of the groove of the lateral rib near the center of the recess,
A synthetic resin steel plate characterized in that a flexibility imparting portion is formed of a discontinuous portion in which the concave groove disappears in a part of the lateral rib formed on the short side of the trunk portion. body. (Reference numerals 13 to 16, 21 in FIG. 1; corresponding to the portions 13 to 20 in FIG. 2) 前記胴部の長辺側および短辺側の少なくとも一方の側の下部に、上下方向に延びる上部側凹凸条部と、この上部側凹凸条部の下に下部側凹凸条部と、これらの上、下部側凹凸条部の間に周方向に延びる凹部とからなる第２の補強パネルが形成されていることを特徴とする請求項１０記載の合成樹脂製壜体。（請求項１０＋図１,図２の符号２３〜３０の部分に対応）An upper side uneven strip extending in the vertical direction at the lower part of at least one of the long side and the short side of the trunk portion, and a lower side uneven strip below the upper side uneven strip, The synthetic resin casing according to claim 10, wherein a second reinforcing panel including a concave portion extending in the circumferential direction is formed between the lower-side concave and convex portions. (Claim 10 + corresponding to reference numerals 23 to 30 in FIGS. 1 and 2) 前記横方向リブは複数形成されており、
それらの複数の横方向リブのうち、一部の横方向リブは、前記補強パネルの凹部の深さが前記横方向リブの凹溝の深さより浅い領域に形成されていて、この領域の部分の横方向リブの深さは、前記補強パネルの凹部の深さが深くなるにしたがって徐々に浅くなっており、
前記複数の横方向リブのうち、他の横方向リブは、前記補強パネルの凹部の深さが前記横方向リブの凹溝の深さより浅い領域および前記補強パネルの凹部の深さが前記横方向リブの凹溝の深さより深い領域にまたがって形成されていて、前記他の横方向リブが、前記補強パネルの凹部の深さが前記横方向リブの凹溝の深さより浅い領域では形成されるが、前記補強パネルの凹部の深さが前記横方向リブの凹溝の深さより深い領域では消滅することを特徴とする請求項１０または１１記載の合成樹脂製壜体。（請求項１０ｏｒ１１＋図１の符号１３〜１６,２１の具体的特徴の部分に対応）A plurality of the lateral ribs are formed,
Among the plurality of lateral ribs, some of the lateral ribs are formed in a region where the depth of the recessed portion of the reinforcing panel is shallower than the depth of the recessed groove of the lateral direction rib. The depth of the lateral rib is gradually shallower as the depth of the concave portion of the reinforcing panel is increased,
Among the plurality of lateral ribs, the other lateral ribs include a region where the depth of the concave portion of the reinforcing panel is shallower than the depth of the concave groove of the lateral rib and the depth of the concave portion of the reinforcing panel is the lateral direction. The other lateral rib is formed in a region where the depth of the concave portion of the reinforcing panel is shallower than the depth of the concave groove of the lateral rib. The synthetic resin casing according to claim 10 or 11, wherein the depth of the concave portion of the reinforcing panel disappears in a region deeper than the depth of the concave groove of the lateral rib. (Corresponding to the specific features of claims 10 or 11 + reference numerals 13 to 16, 21 in FIG. 1) 前記胴部の長辺側および短辺側の少なくとも一方の側の上部と下部との間に、第２の横方向リブが形成されているとともに、この第２の横方向リブは、上下の傾斜側面部とこれらの傾斜側面部の間に位置する底部とからなる、断面が胴部の外面から深くなるにしたがって狭くなる台形状に形成されており、
前記第２の横方向リブの一部に、前記底部の幅が前記第２の横方向リブの他部における底部の幅より広くかつ周方向に延びる拡幅部からなる補強リブ部が形成されているとともに、この補強リブ部の拡幅部はその周方向両端から中央に向かって徐々に広くなって中央で最大となるように設定されていることを特徴とする請求項１０ないし１２のいずれか１記載の合成樹脂製壜体。（請求項１０,11ｏｒ１2＋図１,図２の符号１２,３３,３４の具体的特徴の部分に対応）A second lateral rib is formed between an upper part and a lower part on at least one side of the long side and the short side of the body part, and the second lateral rib is vertically inclined. It consists of a side part and a bottom part located between these inclined side parts, and the cross section is formed in a trapezoidal shape that becomes narrower as it becomes deeper from the outer surface of the body part,
A reinforcing rib portion is formed in a part of the second lateral rib, and includes a widened portion having a width that is wider than a bottom portion of the other portion of the second lateral rib and that extends in the circumferential direction. The widened portion of the reinforcing rib portion is set so as to gradually widen from both ends in the circumferential direction toward the center and maximize at the center. Synthetic resin housing. (Claim 10, 11 or 12 2 + corresponding to specific features of reference numerals 12, 33, 34 in FIGS. 1 and 2) 前記横方向リブの凹溝に連続する凹部からなる補強パネルは、円形状、楕円形、長円形状、あるいは菱形形状に形成されていることを特徴とする請求項１、２、３、４、１０、１１、１２、および１３のいずれか１記載の合成樹脂製壜体。（請求項６は入らない；請求項１,２,３,４,１０,１１,１２ｏｒ１３＋図１の符号２１の具体的形状の特徴部分に対応）The reinforcing panel comprising a concave portion that is continuous with the concave groove of the lateral rib is formed in a circular shape, an elliptical shape, an elliptical shape, or a rhombus shape. The synthetic resin casing according to any one of 10, 11, 12, and 13. (Claim 6 does not enter; claims 1, 2, 3, 4, 10, 11, 12 or 13 + corresponds to the feature of the specific shape of reference numeral 21 in FIG. 1) 前記補強リブ部の拡幅部は、円形状、楕円形、長円形状、あるいは菱形形状に形成されていることを特徴とする請求項２、３、５、８、９,および１３のいずれか１記載の合成樹脂製壜体。（請求項４,６は入らない；請求項２,３,５,８,９,ｏｒ１３＋図１の符号１２,３３；図２の符号１２,３４の具体的形状の特徴部分に対応）The widened portion of the reinforcing rib portion is formed in a circular shape, an elliptical shape, an oval shape, or a rhombus shape, or any one of claims 2, 3, 5, 8, 9, and 13. The described synthetic resin casing. (Claims 4 and 6 are not included; Claims 2, 3, 5, 8, 9, or13 + reference numerals 12 and 33 in FIG. 1; corresponding to characteristic portions of specific shapes 12 and 34 in FIG. 2)
JP05974698A 1998-03-11 1998-03-11 Synthetic resin housing Expired - Lifetime JP3982651B2 (en)

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JP6786633B2 (en) * 2019-01-11 2020-11-18 ザ コカ・コーラ カンパニーＴｈｅ Ｃｏｃａ‐Ｃｏｌａ Ｃｏｍｐａｎｙ Plastic bottle

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