JP4573981B2

JP4573981B2 - Foldable transport container

Info

Publication number: JP4573981B2
Application number: JP2000306184A
Authority: JP
Inventors: 哲也村上; 英俊山口
Original assignee: Gifu Plastic Industry Co Ltd
Current assignee: Gifu Plastic Industry Co Ltd
Priority date: 2000-10-05
Filing date: 2000-10-05
Publication date: 2010-11-04
Anticipated expiration: 2020-10-05
Also published as: JP2002104406A

Description

【０００１】
【発明の属する技術分野】
この発明は、不使用時には小さくコンパクトに折り畳んで収納及び運搬することができるように構成された折り畳み式運搬用容器に関するものである。
【０００２】
【従来の技術】
従来より、この種の折り畳み式運搬用容器５０としては、例えば、図６（ａ）に示されるような合成樹脂により有底長四角箱状に形成された容器本体５１からなる折り畳み式運搬用容器５０が知られている。前記容器本体５１は、長四角板状に形成された底壁６０と、その底壁６０の対向する一側縁に沿って立設された一対の短側壁５２と、前記底壁６０の対向する他側縁に沿って立設された一対の長側壁５３とを備えている。底壁６０の上面にはその四側周縁に沿って支持突条５４が形成され、前記短側壁５２及び長側壁５３はいずれも回動手段により支持突条５４に回動可能に軸着されており、容器本体５１の内方に折り畳むことができるように構成されている。
【０００３】
短側壁５２及び長側壁５３の外面には、各側壁５２，５３の縦方向及び横方向に延びるリブ５５が形成され、そのリブ５５により各側壁５２，５３に所要の剛性を付与している。また、長側壁５３の下端面の両側部には、それぞれ長側壁５３の長さ方向に沿って延びる目隠しリブ５６が形成されている。長側壁５３の両端部及び短側壁５２の両端部にはそれぞれ凹凸の係合関係で係合する図示しない係合手段が設けられている。
【０００４】
そして、長側壁５３及び短側壁５２を立設させたとき、前記係合手段により長側壁５３と短側壁５２とが係合して容器本体５１が組み立てられるように構成されている。長側壁５３を立設させる際、同長側壁５３を回動させたとき、前記目隠しリブ５６は支持突条５４を一旦乗り越えた後、図６（ｂ）に示すように、下端縁が支持突条５４上面に当接して長側壁５３の荷重を支持するとともに、支持突条５４上面と長側壁５３下端面との間の隙間を覆って、容器本体５１内を視認不能にしている。
【０００５】
【発明が解決しようとする課題】
ところが、前記従来の折り畳み式運搬用容器５０では、容器本体５１の組立状態において、図６（ｂ）に示すように、長側壁５３の目隠しリブ５６以外の下端面と支持突条５４の上面とは離間している。そのため、折り畳み式運搬用容器５０の使用の際、例えば長側壁１３に対して上方から圧縮荷重が作用した場合、その荷重は長側壁１３のリブ５５に支持されて長側壁１３の変形等が防止される。
しかし、前記圧縮荷重が支持突条５４上面に当接している目隠しリブ５６を介してその支持突条５４に支持されたとき、長側壁５３の下端面と支持突条５４上面との間に挟まれた目隠しリブ５６が変形したり、損傷を受けたりするおそれがあるという問題があった。
【０００６】
この発明は、上記のような従来技術に存在する問題点に着目してなされたものである。その目的とするところは、容器本体に作用する圧縮荷重を効果的に支持して容器本体の変形等を防止することができる折り畳み式運搬用容器を提供することにある。
【０００７】
【課題を解決するための手段】
上記の目的を達成するために、請求項１に記載の発明の折り畳み式運搬用容器は、四角板状に形成されるとともに、その四側縁部に沿って支持突条を設けた底壁と、その底壁の対向する側縁に沿って立設された一対の第一側壁と、前記底壁の対向する他側縁に沿って立設された一対の第二側壁とを備えた有底四角箱状の容器本体から構成され、前記第一側壁及び第二側壁を回動手段を介して前記支持突条に軸着し、前記第一側壁及び第二側壁を前記支持突条に立設して組立可能に構成するとともに、前記第一側壁を回動させて底壁の上面に折り畳んだ後、第二側壁を回動させて第一側壁の上面に折り畳むことによって、容器本体を折り畳み可能に構成した折り畳み式運搬用容器であって、前記第一側壁及び第二側壁のうち少なくともいずれか一方の外面には、各側壁に所要の剛性を付与すべく少なくとも２本の縦リブが設けられ、少なくとも同縦リブの延長線上に位置する側壁の下端面には、下方に突出するように支持突部が設けられ、組立状態にある容器本体の当該側壁に作用する圧縮荷重を支持可能とするために、組立状態において前記支持突部の下端縁が前記支持突条の上面に当接するようにしたものである。
【０００８】
請求項２に記載の発明の折り畳み式運搬用容器は、請求項１に記載の発明において、前記支持突部の間には、前記支持突条の上面と支持突部が形成された側壁下端面との間から容器本体内を視認不能とする目隠しリブが各側壁の横方向に沿って突設され、支持突部をその外端縁が前記目隠しリブの外端縁より外側に位置すべく形成し、支持突部が形成された側壁を支持突条に対して立設させる際、同支持突部が支持突条上面に当接した後に、前記目隠しリブが支持突条上面と側壁下端面との間に位置するように構成し、前記目隠しリブが設けられた側壁の下端面には、前記目隠しリブよりも外側に側壁の横方向に沿って外側部突条が形成され、組立状態において前記外側部突条の上端が前記目隠しリブの下端よりも上方に位置するように構成したものである。
【０００９】
請求項３に記載の発明の折り畳み式運搬用容器は、請求項１又は請求項２に記載の発明において、前記支持突部が形成された側壁の支持突条に対する立設作業を円滑に行うべく当該支持突部の外端縁を曲面状に形成したものである。
【００１０】
【発明の実施の形態】
以下、この発明を具体化した実施形態を図面に基づいて詳細に説明する。
図１（ａ）及び図２に示すように、折り畳み式運搬用容器１０を構成する容器本体１１は、合成樹脂により有底長四角箱状に形成されている。この容器本体１１は、長四角板状に形成された底壁１２と、その底壁１２の対向する一側縁に沿って立設された第一側壁としての一対の長側壁１３と、前記底壁１２の対向する他側縁に沿って立設された第二側壁としての一対の短側壁１４とを備えている。
図５（ａ）、（ｂ）に示すように、この容器本体１１は、一対の長側壁１３を底壁１２の上面に折り畳んだ後、一対の短側壁１４を長側壁１３の上面に折り畳むことによって、折り畳み可能に構成されている。
【００１１】
まず、前記底壁１２について説明すると、図１（ａ）及び図２に示すように、底壁１２はその上面の四側縁部に沿って支持突条２１を有し、その支持突条２１の上端面で長側壁１３及び短側壁１４が支持されている。各支持突条２１の上端部には、所定間隔をおいて図示しない軸受け部が設けられ、長側壁１３及び短側壁１４の下端部に設けられた図示しない回動軸を回動可能に軸着している。
【００１２】
この構成によって、長側壁１３及び短側壁１４は、容器本体１１の内方又は外方に回動して底壁１２に対して折り畳み又は立設することができるようになっている。また、図１（ａ）に示すように、長側壁１３が支持される支持突条２１の外側部には、長四角形状に凹設された各一対の収容凹部２４が設けられている。
図１（ａ）、（ｂ）及び図２に示すように、前記支持突条２１の上端外縁には、支持突条２１の外側面に沿って外側部突条２５が僅かに上方に延びるように突設されている。
【００１３】
次いで、前記長側壁１３及び短側壁１４について説明すると、前記長側壁１３及び短側壁１４の外面にはその長さ及び幅方向、即ち、各側壁１３，１４が立設されて容器本体１１が組立てられた状態において、それら側壁１３，１４の左右及び上下方向に連続して延びる複数本の横リブ２２及び２本の縦リブ２３が所定間隔をおいて外方へ突設され、横リブ２２と縦リブ２３とは直交している。そして、それら縦リブ２３及び横リブ２２により長側壁１３及び短側壁１４に所要の剛性が付与されている。
【００１４】
また、図１（ａ）、（ｂ）に示すように、前記収容凹部２４と対応する位置に配設される長側壁１３の下端部内方位置には、長側壁１３の内側面に沿って目隠しリブ２６が僅かに下方に延びるように突設されている。そして、長側壁１３及び短側壁１４を立設させたとき、これら外側部突条２５及び目隠しリブ２６によって、支持突条２１の上端面と、各側壁１３，１４の下端面との間に形成される隙間を被覆して容器本体１１内の収容物を外側方から視認不能とすることができるようになっている。
【００１５】
図３に実線及び破線に示すように、長側壁１３に形成された前記目隠しリブ２６の両側部にはそれぞれ長側壁１３の厚み方向に沿って連続して延びる支持突部２７が下方へ突設され、その突出長さは前記目隠しリブ２６の突出長さより若干長く形成されている。各目隠しリブ２６の外側、即ち短側壁１４側に形成された支持突部２７は、前記縦リブ２３の延長線上に位置している。また、図１（ｂ）に示すように、各支持突部２７の外端縁は長側壁１３の縦リブ２３及び横リブ２２の外端縁より容器本体１１側、即ち内側に位置しているとともに、目隠しリブ２６の外端縁よりも外側に位置している。さらに、各支持突部２７の外端縁において、長側壁１３の下端面から支持突部２７に連続する部分と、支持突部２７の下端縁はそれぞれ曲面状に形成されてガイド面２７ａが形成されている。
【００１６】
長側壁１３の左右両側部には、図４（ａ）に示すように、その外側部上方位置を長四角形状に凹設することによって係合凹部３１が設けられている。この係合凹部３１の下端部には、側面ほぼコ字状に形成された規制凸部３２が長側壁１３の外側方に延びるように突設されている。この規制凸部３２の上方には、ほぼ長四角柱状に形成された第２規制凸部３３が長側壁１３の外側方に延びるように突設されている。
【００１７】
図１（ａ）、（ｂ）及び図４（ａ）に示すように、短側壁１４の左右両側部には、長四角板状に形成された規制板４１が短側壁１４の内側方に延びるように突設され、前記長側壁１３の係合凹部３１内に収容されるようになっている。また、図５（ｂ）に示すように、これら規制板４１は、容器本体１１を折り畳んだとき、長側壁１３を支持する支持突条２１の収容凹部２４内に収容されるようになっている。
【００１８】
図４（ａ）、（ｂ）に示すように、規制板４１の下端部内側面（裏面）には、その端縁に沿って規制突部４２が長側壁１３の内側方に延びるように突設されている。この規制突部４２は、前記長側壁１３の規制凸部３２と当接可能に構成されている。さらに、規制板４１の上端部には、前記長側壁１３の第２規制凸部３３と対応する位置に係合孔４３が長四角孔状に貫設されている。この係合孔４３は、容器本体１１を組立てたときに前記第２規制凸部３３が係入されるように構成されている。
【００１９】
前記規制突部４２と係合孔４３との中間（高さ）に位置する短側壁１４をコ字状に切欠くことによって押圧片４４が設けられている。さらに、各押圧片４４の先端部は、短側壁１４の端部側に形成されている。これら押圧片４４の先端部には、垂直方向に延びるとともに短側壁１４の内外両側方に突出する係合突部４５が突設されている。
【００２０】
図４（ａ）に２点鎖線で示すように、前記先端部に係合突部４５が突設された押圧片４４は、その基端部を中心に短側壁１４の外側方及び内側方に僅かに弾性変形させることができるように構成されている。そして、容器本体１１を組み立てたとき、前記短側壁１４の内側方に突出された係合突部４５が長側壁１３の上部壁面１３ａ両端部と係合するようになっている。
【００２１】
上記折り畳み式運搬用容器１０の作用について以下に記載する。
さて、上記のように構成された折り畳み式運搬用容器１０を組み立てて使用する際には、まず、一対の短側壁１４を、回動軸を中心に９０°回動させて支持突条２１の上端面上に立設させた後、一対の長側壁１３を同様に回動させて支持突条２１の上端面上に立設させる。
【００２２】
このとき、支持突部２７はその下方への突出長さが目隠しリブ２６の突出長さより長く、図１（ｂ）に示すように、ガイド面２７ａが目隠しリブ２６の外端縁より外側に位置するため、目隠しリブ２６が支持突条２１外面、即ち底壁１２に当接することなくガイド面２７ａが支持突条２１に当接する。そして、支持突部２７のガイド面２７ａが支持突条２１外面に当接した状態で長側壁１３をさらに回動させると、ガイド面２７ａが支持突条２１上端内縁に摺接しながら支持突条２１上面を乗り越える。このとき、ガイド面２７ａは曲面状をなすため、支持突条２１の上端内縁に引っかかることなく円滑に乗り上げる。
【００２３】
さらに、長側壁１３を上方へ回動させると支持突部２７の下端縁が支持突条２１の上端内縁に摺接するため、支持突部２７により目隠しリブ２６の下端縁と支持突条２１上面とが一定距離離間した状態が維持され、目隠しリブ２６の下端縁が支持突条２１に引っかからないように支持突部２７に案内された状態で長側壁１３は円滑に回動する。そして、支持突部２７が支持突条２１上に乗り上げた後、目隠しリブ２６が支持突条２１上に乗り上げて、長側壁１３下端面と支持突条２１上面、即ち底壁１２上面との間に目隠しリブ２６が位置する。
【００２４】
続いて、長側壁１３の規制凸部３２と、短側壁１４の規制突部４２とが互いに係合された状態になる。さらに、長側壁１３の上部両端部が係合突部４５の内側部先端縁と係合され、長側壁１３の容器本体１１内方への回動が規制された状態になり、短側壁１４の規制突部４２及び係合孔４３が、長側壁１３の規制凸部３２及び第２規制凸部３３と当接して長側壁１３及び短側壁１４の容器本体１１内方及び外方への回動が規制される。従って、支持突条２１の上端面上で長側壁１３及び短側壁１４が垂直方向に立設固定される。
【００２５】
図１（ｂ）及び図３に示すように、容器本体１１が組み立てられた状態において、長側壁１３の支持突部２７の下端縁は支持突条２１上面に当接し、目隠しリブ２６の下端縁と支持突条２１上面とは離間している。そのため、例えば長側壁１３に上方からの圧縮荷重が作用した場合、その圧縮荷重は縦リブ２３及び横リブ２２に支持され、長側壁１３の変形は防止される。さらに、圧縮荷重は支持突部２７を介して支持突条２１、即ち、底壁１２に支持され、支持突条２１と離間している目隠しリブ２６による圧縮荷重の支持はなくなる。
【００２６】
上記実施形態によって発揮される効果について、以下に記載する。
・支持突部２７は支持突条２１の上面に当接し、目隠しリブ２６の下端縁は支持突条２１上面と離間しているため、長側壁１３に作用する圧縮荷重は縦リブ２３及び支持突部２７を介して支持突条２１に支持され、目隠しリブ２６は支持しない。従って、支持突部２７が形成されず、圧縮荷重を目隠しリブ２６で支持して、その目隠しリブ２６が長側壁１３下端面と支持突条２１上面とに挟まれて変形したり、損傷を受けたりするといったおそれをなくすことができる。
【００２７】
・長側壁１３の下端面には間隔をおいて４箇所に支持突部２７が形成されているため、長側壁１３に作用する圧縮荷重を分割して支持することができる。従って、圧縮荷重を４箇所未満の支持突部２７で支持する場合と比較して、目隠しリブ２６が変形したり、損傷を受けたりするといったおそれを確実に防止することができる。
【００２８】
・支持突部２７の長側壁１３下端面からの突出長さは目隠しリブ２６の突出長さより若干長く形成されているため、長側壁１３を上方へ回動させたとき、支持突部２７が支持突条２１に当接し、目隠しリブ２６は支持突条２１に当接せず、支持突部２７が支持突条２１上に乗り上げた後、目隠しリブ２６が支持突条２１上に位置する。従って、目隠しリブ２６が支持突条２１に当接する場合と比較して長側壁１３の回動作業を円滑に行うことができる。
【００２９】
・支持突部２７は長側壁１３の厚み方向に延びて形成されているため、長側壁１３の上方への回動に伴い支持突条２１上端内縁に摺接する。そのため、長側壁１３がその下端面と支持突条２１との間に一定間隔をおいた状態で回動し、支持突部２７が支持突条２１上に乗り上げた後、目隠しリブ２６が支持突条２１上に位置する。従って、その支持突部２７により長側壁１３を回動方向へ案内することができ、長側壁１３の回動作業を円滑に行うことができる。
【００３０】
・支持突部２７の外端縁は目隠しリブ２６の外端縁よりも外側に位置しているため、長側壁１３の回動の際、目隠しリブ２６は支持突条２１に当接せず、支持突部２７が支持突条２１外面に摺接する。従って、支持突部２７の支持突条２１に対する摺接により長側壁１３を回動方向へ案内することができ、長側壁１３の回動作業を円滑に行うことができる。
【００３１】
・支持突部２７にはガイド面２７ａが形成されているため、支持突部２７の下端外縁が角張って形成されている場合と異なり、支持突部２７が支持突条２１の上端内縁に当接するとき、両者の引っかかりを防止することができる。従って、長側壁１３の回動作業を円滑に行い、長側壁１３の立設作業を円滑に行うことができる。
【００３２】
なお、本実施形態は、次のように変更して具体化することも可能である。
・実施形態では支持突部２７の突出長さを目隠しリブ２６の突出長さより長く形成したが、両突出長さを同じに形成してもよい。
【００３３】
・実施形態では、支持突部２７を長側壁１３の厚み方向に沿って連続して形成したが、折り畳み式運搬用容器１０の成形を考慮した上で円柱状、四角柱状をなす支持突部２７を長側壁１３の厚み方向に１箇所に形成してもよい。
【００３４】
・実施形態では、支持突部２７の外端縁を曲面状に形成してガイド面２７ａを形成したが、ガイド面２７ａを省略してもよい。又は、支持突部２７の下端外縁のみを曲面状に形成してガイド面２７ａを形成してもよく、長側壁１３の下端面から支持突部２７に連続する部分のみにガイド面２７ａを形成してもよい。
【００３５】
・実施形態では、長側壁１３の下端面４箇所に支持突部２７を形成したが、５箇所以上形成してもよい。また、縦リブ２３の延長線上に位置する長側壁１３の下端面のみの２箇所に支持突部２７を形成してもよく、その間に支持突部２７を形成して３箇所に形成してもよい。
【００３６】
・実施形態では、支持突部２７の外端縁を目隠しリブ２６の外端縁より外側に形成したが、両者の外端縁を同じ位置に形成してもよい。
・実施形態では、底壁１２を支持突条２１を有する構成としたが、支持突条２１を省略して底壁１２上面を平面状に形成してもよい。
【００３７】
・実施形態では長側壁１３のみに支持突部２７を形成したが、短側壁１４の下端面において、縦リブ２３の延長線上に支持突部２７を形成してもよい。又は長側壁１３の支持突部２７を省略して短側壁１４のみに支持突部２７を形成してもよい。
【００３８】
・実施形態では長側壁１３に縦リブ２３を２本形成したが、縦リブ２３を３本以上形成し、それら縦リブ２３の延長線上に位置する長側壁１３の下端面に支持突部２７を形成してもよい。
【００３９】
・目隠しリブ２６及び支持突条２１のうち少なくとも一方を省略してもよい。また、実施形態では、目隠しリブ２６を長側壁１３の長さ方向に沿って間隔をおいて２箇所に形成し、各目隠しリブ２６の両側に支持突部２７を形成したが、両目隠しリブ２６の外側のみに支持突部２７を形成するとともに、両目隠しリブ２６の内側の支持突部２７を省略して、支持突部２７間に目隠しリブ２６を形成してもよい。
【００４０】
・実施形態では、目隠しリブ２６を長側壁１３の長さ方向に沿って間隔をおいて２箇所に形成したが、目隠しリブ２６を長側壁１３の長さ方向に沿って間隔をおいて３箇所に形成し、各目隠しリブ２６の両側に支持突部２７を形成してそれら支持突部２７の延長線上に縦リブ２３を形成してもよい。又は３箇所以上形成された目隠しリブ２６において、両短側壁１４側に位置する目隠しリブ２６の外側のみに支持突部２７を形成してもよい。
【００４１】
・容器本体１１の底壁１２、長側壁１３及び短側壁１４の壁面に多数の孔を貫設することによってメッシュ状に形成すること。或いは、容器本体１１の底壁１２の壁面に多数の孔を貫設することによって、底壁１２をメッシュ状に形成すること。或いは、容器本体１１の長側壁１３及び短側壁１４の壁面に多数の孔を貫設することによって、長側壁１３及び短側壁１４をメッシュ状に形成すること。このように構成した場合、容器本体１１内に野菜や果物等の青果物を収容する場合には、その青果物の腐敗を効果的に抑制することができる。
【００４２】
・実施形態では第一側壁としての長側壁１３、第二側壁としての短側壁１４としたが、第一側壁を短側壁１４，第二側壁を長側壁１３とし、一対の短側壁１４を底壁１２の上面に折り畳んだ後、一対の長側壁１３を短側壁１４の上面に折り畳むように構成してもよい。
【００４３】
さらに、前記実施形態より把握できる技術的思想について以下に記載する。
・前記底壁はその上面の四側縁部に沿った位置に各側縁に立設される側壁を支持可能な支持突条を有し、前記支持突部は側壁の厚み方向に連続して延びて形成されている折り畳み式運搬用容器。このように構成した場合、支持突部が形成された側壁を立設させるために回動させたとき、支持突部が支持突条外面に沿って摺接する。そのため、支持突部により側壁と支持突条との間に一定間隔をおいた状態で側壁を回動させることができ、支持突部が形成された側壁の立設作業を円滑に行うことができる。
【００４４】
・前記支持突部の突出長さは前記目隠しリブの突出長さより長く形成されている折り畳み式運搬用容器。このように構成した場合、支持突部が形成された側壁を立設させるために回動させたとき、支持突部により目隠しリブは底壁上面に当接しない。従って、目隠しリブが底壁上面に当接する場合と比較して側壁の立設作業を円滑に行うことができる。
【００４５】
【発明の効果】
以上詳述したように、この発明によれば、次のような効果を奏する。
各請求項に記載の発明の折り畳み式運搬用容器によれば、容器本体に作用する圧縮荷重を効果的に支持して容器本体の変形等を防止することができる。
【００４６】
請求項２に記載の発明の折り畳み式運搬用容器によれば、支持突部が形成された側壁を立設するための回動作業を円滑に行うことができる。
【００４７】
請求項３に記載の発明の折り畳み式運搬用容器によれば、支持突部が形成された側壁を立設するための回動作業をより一層円滑に行うことができる。
【図面の簡単な説明】
【図１】（ａ）は実施形態の折り畳み式運搬用容器を示す側面図、（ｂ）は図１（ａ）の１ｂ−１ｂ線拡大断面図。
【図２】実施形態の折り畳み式運搬用容器を示す正面図。
【図３】実施形態の支持突部と支持突条との当接状態を示す部分側面図。
【図４】（ａ）、（ｂ）は長側壁と短側壁との組立状態を部分拡大図。
【図５】（ａ）は折り畳み式運搬用容器を折り畳んだ状態を示す平面図、（ｂ）は折り畳み式運搬用容器を折り畳んだ状態を示す側面図。
【図６】（ａ）は従来の折り畳み式運搬用容器を示す側面図、（ｂ）は図６（ａ）の６ｂ−６ｂ線拡大断面図。
【符号の説明】
１０…折り畳み式運搬用容器、１１…折り畳み式運搬用容器を構成する容器本体、１２…底壁、１３…第一側壁としての長側壁、１４…第二側壁としての短側壁、２３…縦リブ、２６…目隠しリブ、２７…支持突部、２７ａ…ガイド面。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a folding transport container configured to be small and compactly folded and stored and transported when not in use.
[0002]
[Prior art]
Conventionally, as this type of foldable transport container 50, for example, a foldable transport container including a container body 51 formed in a bottomed rectangular box shape with a synthetic resin as shown in FIG. 50 are known. The container body 51 has a bottom wall 60 formed in a long rectangular plate shape, a pair of short side walls 52 erected along one opposing edge of the bottom wall 60, and the bottom wall 60 facing each other. And a pair of long side walls 53 erected along the other side edge. Support ridges 54 are formed on the upper surface of the bottom wall 60 along the four peripheral edges thereof, and both the short side wall 52 and the long side wall 53 are pivotally attached to the support ridges 54 by a rotating means. And can be folded inward of the container body 51.
[0003]
On the outer surfaces of the short side wall 52 and the long side wall 53, ribs 55 extending in the vertical direction and the horizontal direction of the side walls 52, 53 are formed, and the ribs 55 give the side walls 52, 53 the required rigidity. Further, blind ribs 56 extending along the length direction of the long side wall 53 are formed on both sides of the lower end surface of the long side wall 53. Engaging means (not shown) that engage with each other in a concave and convex engagement relationship are provided at both ends of the long side wall 53 and both ends of the short side wall 52.
[0004]
When the long side wall 53 and the short side wall 52 are erected, the long side wall 53 and the short side wall 52 are engaged by the engaging means so that the container main body 51 is assembled. When the long side wall 53 is erected, when the long side wall 53 is rotated, the blind rib 56 once climbs over the support protrusion 54, and then the lower end edge is supported by the support protrusion as shown in FIG. While abutting on the upper surface of the strip 54 to support the load on the long side wall 53, the gap between the upper surface of the support protrusion 54 and the lower end surface of the long side wall 53 is covered to make the inside of the container body 51 invisible.
[0005]
[Problems to be solved by the invention]
However, in the conventional folding transport container 50, in the assembled state of the container main body 51, as shown in FIG. 6B, the lower end surface other than the blind rib 56 of the long side wall 53 and the upper surface of the support protrusion 54 Are separated. Therefore, when the folding transport container 50 is used, for example, when a compression load is applied to the long side wall 13 from above, the load is supported by the rib 55 of the long side wall 13 to prevent deformation of the long side wall 13. Is done.
However, when the compressive load is supported by the support protrusion 54 via the blind rib 56 that is in contact with the upper surface of the support protrusion 54, the compression load is sandwiched between the lower end surface of the long side wall 53 and the upper surface of the support protrusion 54. There is a problem in that the blindfold rib 56 may be deformed or damaged.
[0006]
The present invention has been made paying attention to the problems existing in the prior art as described above. An object of the present invention is to provide a folding transport container that can effectively support a compressive load acting on the container body and prevent deformation of the container body.
[0007]
[Means for Solving the Problems]
To achieve the above object, collapsible transport container of the invention described in claim 1 is formed in a rectangular plate Rutotomoni, and a support ridge is provided with a bottom wall along its four side edges A bottomed structure comprising a pair of first side walls erected along opposing side edges of the bottom wall, and a pair of second side walls erected along opposite side edges of the bottom wall Consists of a rectangular box-shaped container body, the first side wall and the second side wall are pivotally attached to the support ridge via a rotating means, and the first side wall and the second side wall are erected on the support ridge . The container body can be folded by rotating the first side wall and folding it on the top surface of the bottom wall, and then turning the second side wall and folding it on the top surface of the first side wall. A foldable transport container configured as described above, wherein at least one of the first side wall and the second side wall The outer surface of the square, at least two longitudinal ribs to impart the required rigidity to the side walls are mounted on the lower end surface of the side wall located on the extension of at least the longitudinal ribs, supporting so as to protrude downward In order to be able to support the compressive load acting on the side wall of the container body in the assembled state provided with a protrusion , the lower end edge of the support protrusion is in contact with the upper surface of the support protrusion in the assembled state. It is a thing.
[0008]
Collapsible transport container of the invention described in claim 2 is the invention according to claim 1, wherein between the support protrusions is a top and side wall lower end surface supporting protrusions are formed of the support protrusions A blindfold rib that makes the inside of the container body invisible from between and protrudes along the lateral direction of each side wall, and the support protrusion is formed so that its outer edge is located outside the outer edge of the blindfold. and, time of erected side walls supporting protrusions are formed with respect to the support ribs, after the supporting projection is in contact with the supporting ridge top surface, the blindfold ribs and holding protrusions top and the side wall lower end face An outer side protrusion is formed on the lower end surface of the side wall provided with the blindfold ribs along the lateral direction of the side wall on the outer side of the blindfold ribs. Constructed so that the upper end of the outer ridge is located above the lower end of the blindfold rib Those were.
[0009]
According to a third aspect of the present invention, in the foldable transport container according to the first or second aspect of the present invention, in order to smoothly perform the upright operation on the support protrusion on the side wall on which the support protrusion is formed. The outer edge of the support protrusion is formed in a curved surface shape.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below in detail with reference to the drawings.
As shown in FIGS. 1A and 2, the container body 11 constituting the foldable transport container 10 is formed in a bottomed rectangular box shape from a synthetic resin. The container body 11 includes a bottom wall 12 formed in a long rectangular plate shape, a pair of long side walls 13 as first side walls standing along one opposing edge of the bottom wall 12, and the bottom A pair of short side walls 14 serving as second side walls standing along the opposite side edges of the wall 12 are provided.
As shown in FIGS. 5A and 5B, the container body 11 folds the pair of short side walls 14 on the upper surface of the long side wall 13 after folding the pair of long side walls 13 on the upper surface of the bottom wall 12. Is configured to be foldable.
[0011]
First, the bottom wall 12 will be described. As shown in FIGS. 1A and 2, the bottom wall 12 has support protrusions 21 along the four side edges of the upper surface, and the support protrusions 21. The long side wall 13 and the short side wall 14 are supported by the upper end surface of the. A bearing portion (not shown) is provided at the upper end portion of each support protrusion 21 at a predetermined interval, and a rotation shaft (not shown) provided at the lower end portions of the long side wall 13 and the short side wall 14 is pivotally attached. is doing.
[0012]
With this configuration, the long side wall 13 and the short side wall 14 can be folded or erected with respect to the bottom wall 12 by rotating inward or outward of the container body 11. Moreover, as shown to Fig.1 (a), each pair of accommodating recessed part 24 dented in the shape of an oblong square is provided in the outer side part of the support protrusion 21 in which the long side wall 13 is supported.
As shown in FIGS. 1A, 1 </ b> B, and 2, the outer ridge 25 extends slightly upward along the outer surface of the support ridge 21 at the upper edge of the support ridge 21. Projected to
[0013]
Next, the long side wall 13 and the short side wall 14 will be described. On the outer surfaces of the long side wall 13 and the short side wall 14, the length and width direction, that is, the side walls 13 and 14 are erected, and the container body 11 is assembled. In this state, a plurality of lateral ribs 22 and two longitudinal ribs 23 that extend continuously in the left and right and up and down directions of the side walls 13 and 14 are projected outwardly at a predetermined interval. The vertical ribs 23 are orthogonal to each other. The longitudinal ribs 23 and the lateral ribs 22 impart required rigidity to the long side wall 13 and the short side wall 14.
[0014]
Further, as shown in FIGS. 1A and 1B, the inner side of the lower side wall of the long side wall 13 disposed at a position corresponding to the housing recess 24 is blinded along the inner side surface of the long side wall 13. The ribs 26 project so as to extend slightly downward. When the long side wall 13 and the short side wall 14 are erected, the outer side protrusion 25 and the blindfold rib 26 are formed between the upper end surface of the support protrusion 21 and the lower end surfaces of the side walls 13 and 14. By covering the gap, the contents in the container body 11 can be made invisible from the outside.
[0015]
As shown by a solid line and a broken line in FIG. 3, support protrusions 27 that continuously extend along the thickness direction of the long side wall 13 project downward on both sides of the blind rib 26 formed on the long side wall 13. The projection length is slightly longer than the projection length of the blindfold rib 26. Support protrusions 27 formed on the outside of each blind rib 26, that is, on the side of the short side wall 14, are located on an extension line of the vertical rib 23. Further, as shown in FIG. 1B, the outer edge of each support protrusion 27 is located on the container body 11 side, that is, on the inner side from the outer edges of the longitudinal ribs 23 and the lateral ribs 22 of the long side wall 13. At the same time, it is positioned outside the outer edge of the blindfold rib 26. Further, at the outer end edge of each support protrusion 27, the portion that continues from the lower end surface of the long side wall 13 to the support protrusion 27 and the lower end edge of the support protrusion 27 are each formed into a curved surface to form a guide surface 27a. Has been.
[0016]
As shown in FIG. 4A, the left and right side portions of the long side wall 13 are provided with recessed recesses 31 by recessing the upper position of the outer side thereof into a long square shape. At the lower end portion of the engagement recess 31, a regulation convex portion 32 formed in a substantially U-shaped side surface is projected so as to extend outward of the long side wall 13. Above the restricting convex portion 32, a second restricting convex portion 33 formed in a substantially rectangular column shape is provided so as to extend outward of the long side wall 13.
[0017]
As shown in FIGS. 1A, 1 </ b> B, and 4 </ b> A, a regulation plate 41 formed in the shape of a long square plate extends inward of the short side wall 14 on the left and right sides of the short side wall 14. So as to be accommodated in the engaging recess 31 of the long side wall 13. Further, as shown in FIG. 5 (b), these regulating plates 41 are accommodated in the accommodating recesses 24 of the supporting protrusions 21 that support the long side wall 13 when the container body 11 is folded. .
[0018]
As shown in FIGS. 4A and 4B, on the inner side surface (rear surface) of the lower end portion of the regulating plate 41, a regulating projection 42 is provided so as to extend inward of the long side wall 13 along the edge. Has been. The restricting protrusion 42 is configured to be able to contact the restricting convex portion 32 of the long side wall 13. Further, an engaging hole 43 is formed in the upper end portion of the restricting plate 41 at a position corresponding to the second restricting convex portion 33 of the long side wall 13 in the shape of a long rectangular hole. The engaging hole 43 is configured such that the second restricting convex portion 33 is engaged when the container body 11 is assembled.
[0019]
A pressing piece 44 is provided by cutting out the short side wall 14 located in the middle (height) between the restricting protrusion 42 and the engagement hole 43 in a U-shape. Furthermore, the tip of each pressing piece 44 is formed on the end side of the short side wall 14. Engaging protrusions 45 that project in the vertical direction and project on both the inner and outer sides of the short side wall 14 protrude from the distal ends of the pressing pieces 44.
[0020]
As shown by a two-dot chain line in FIG. 4 (a), the pressing piece 44 having the engaging projection 45 projecting from the distal end portion is formed on the outer side and the inner side of the short side wall 14 around the base end portion. It is configured to be slightly elastically deformable. And when the container main body 11 is assembled, the engaging protrusion 45 protruded inward of the short side wall 14 engages with both ends of the upper wall surface 13a of the long side wall 13.
[0021]
The operation of the foldable transport container 10 will be described below.
Now, when assembling and using the foldable transport container 10 configured as described above, first, the pair of short side walls 14 are rotated by 90 ° about the rotation axis so that the support ridges 21 are formed. After erecting on the upper end surface, the pair of long side walls 13 are similarly rotated to erect on the upper end surface of the support protrusion 21.
[0022]
At this time, the support protrusion 27 has a longer protrusion length than the protrusion length of the blind rib 26, and the guide surface 27a is positioned outside the outer edge of the blind rib 26 as shown in FIG. Therefore, the guide surface 27 a comes into contact with the support protrusion 21 without the blindfold rib 26 coming into contact with the outer surface of the support protrusion 21, that is, the bottom wall 12. When the long side wall 13 is further rotated in a state where the guide surface 27 a of the support protrusion 27 is in contact with the outer surface of the support protrusion 21, the guide surface 27 a is in sliding contact with the upper end inner edge of the support protrusion 21 and the support protrusion 21. Get over the top. At this time, since the guide surface 27a has a curved surface, the guide surface 27a rides smoothly without being caught by the inner edge of the upper end of the support protrusion 21.
[0023]
Further, when the long side wall 13 is rotated upward, the lower end edge of the support protrusion 27 comes into sliding contact with the upper end inner edge of the support protrusion 21, so that the support protrusion 27 causes the lower end edge of the blind rib 26 and the upper surface of the support protrusion 21. Are maintained at a certain distance from each other, and the long side wall 13 is smoothly rotated while being guided by the support protrusion 27 so that the lower end edge of the blindfold rib 26 is not caught by the support protrusion 21. Then, after the support protrusion 27 rides on the support protrusion 21, the blindfold rib 26 rides on the support protrusion 21, and between the lower end surface of the long side wall 13 and the upper surface of the support protrusion 21, that is, the upper surface of the bottom wall 12. The blindfold rib 26 is located at the bottom.
[0024]
Subsequently, the restriction convex portion 32 of the long side wall 13 and the restriction protrusion 42 of the short side wall 14 are engaged with each other. Furthermore, the upper both ends of the long side wall 13 are engaged with the inner edge of the engagement protrusion 45, and the rotation of the long side wall 13 into the container body 11 is restricted. The regulation protrusion 42 and the engagement hole 43 are in contact with the regulation projection 32 and the second regulation projection 33 of the long side wall 13, and the long side wall 13 and the short side wall 14 are turned inward and outward of the container body 11. Is regulated. Therefore, the long side wall 13 and the short side wall 14 are vertically fixed on the upper end surface of the support protrusion 21.
[0025]
As shown in FIGS. 1B and 3, the lower end edge of the support protrusion 27 of the long side wall 13 abuts the upper surface of the support protrusion 21 and the lower end edge of the blindfold rib 26 in a state where the container body 11 is assembled. And the upper surface of the support protrusion 21 are separated from each other. Therefore, for example, when a compressive load is applied to the long side wall 13 from above, the compressive load is supported by the vertical ribs 23 and the horizontal ribs 22, and deformation of the long side wall 13 is prevented. Further, the compressive load is supported by the support protrusion 21, that is, the bottom wall 12 through the support protrusion 27, and the compression load is not supported by the blind ribs 26 separated from the support protrusion 21.
[0026]
The effects exhibited by the above embodiment will be described below.
Since the support protrusion 27 abuts on the upper surface of the support protrusion 21 and the lower end edge of the blind rib 26 is separated from the upper surface of the support protrusion 21, the compressive load acting on the long side wall 13 is caused by the vertical rib 23 and the support protrusion. It is supported by the support protrusion 21 via the part 27, and the blind rib 26 is not supported. Accordingly, the support protrusion 27 is not formed, and the compressive load is supported by the blind rib 26, and the blind rib 26 is sandwiched between the lower end surface of the long side wall 13 and the upper surface of the support protrusion 21, and is deformed or damaged. Can eliminate the risk of accidents.
[0027]
Since the support protrusions 27 are formed at four positions at intervals on the lower end surface of the long side wall 13, the compressive load acting on the long side wall 13 can be divided and supported. Therefore, as compared with the case where the compressive load is supported by the support protrusions 27 at less than four places, it is possible to reliably prevent the possibility that the blind rib 26 is deformed or damaged.
[0028]
Since the protruding length of the support protrusion 27 from the lower end surface of the long side wall 13 is slightly longer than the protrusion length of the blindfold rib 26, the support protrusion 27 is supported when the long side wall 13 is rotated upward. The blind ribs 26 are in contact with the protrusions 21, and the blind ribs 26 are not in contact with the support protrusions 21. After the support protrusions 27 ride on the support protrusions 21, the blind ribs 26 are positioned on the support protrusions 21. Therefore, the rotating operation of the long side wall 13 can be smoothly performed as compared with the case where the blindfold rib 26 is in contact with the support protrusion 21.
[0029]
Since the support protrusion 27 is formed to extend in the thickness direction of the long side wall 13, it comes into sliding contact with the upper end inner edge of the support protrusion 21 as the long side wall 13 rotates upward. Therefore, after the long side wall 13 is rotated with a certain distance between the lower end surface thereof and the support protrusion 21, the support protrusion 27 rides on the support protrusion 21, and then the blindfold rib 26 is supported by the support protrusion. Located on Article 21. Therefore, the long side wall 13 can be guided in the rotation direction by the support protrusion 27, and the long side wall 13 can be smoothly rotated.
[0030]
Since the outer end edge of the support protrusion 27 is positioned outside the outer end edge of the blindfold rib 26, the blindfold rib 26 does not contact the support protrusion 21 when the long side wall 13 is rotated. The support protrusion 27 is in sliding contact with the outer surface of the support protrusion 21. Therefore, the long side wall 13 can be guided in the rotation direction by the sliding contact of the support protrusion 27 with respect to the support protrusion 21, and the long side wall 13 can be smoothly rotated.
[0031]
-Since the guide surface 27a is formed in the support protrusion 27, unlike the case where the lower end outer edge of the support protrusion 27 is formed in a square shape, the support protrusion 27 contacts the upper end inner edge of the support protrusion 21. Sometimes it is possible to prevent the two from getting caught. Therefore, the rotating operation of the long side wall 13 can be performed smoothly, and the standing operation of the long side wall 13 can be performed smoothly.
[0032]
In addition, this embodiment can also be changed and embodied as follows.
In the embodiment, the protruding length of the support protrusion 27 is longer than the protruding length of the blind rib 26, but the protruding lengths may be the same.
[0033]
In the embodiment, the support protrusions 27 are continuously formed along the thickness direction of the long side wall 13. However, the support protrusions 27 are formed in a columnar shape or a rectangular column shape in consideration of the formation of the folding transport container 10. May be formed in one place in the thickness direction of the long side wall 13.
[0034]
In the embodiment, the outer edge of the support protrusion 27 is formed in a curved surface to form the guide surface 27a, but the guide surface 27a may be omitted. Alternatively, the guide surface 27a may be formed by forming only the outer edge of the lower end of the support protrusion 27 in a curved shape, and the guide surface 27a is formed only at the portion continuing from the lower end surface of the long side wall 13 to the support protrusion 27. May be.
[0035]
In the embodiment, the support protrusions 27 are formed at the four positions on the lower end surface of the long side wall 13, but may be formed at five or more positions. Further, the support protrusions 27 may be formed only at the lower end surface of the long side wall 13 positioned on the extension line of the vertical rib 23, or the support protrusions 27 may be formed between the two at three positions. Good.
[0036]
In the embodiment, the outer end edge of the support protrusion 27 is formed outside the outer end edge of the blind rib 26, but both outer end edges may be formed at the same position.
In the embodiment, the bottom wall 12 is configured to have the support ridges 21, but the support ridges 21 may be omitted and the upper surface of the bottom wall 12 may be formed in a planar shape.
[0037]
In the embodiment, the support protrusion 27 is formed only on the long side wall 13, but the support protrusion 27 may be formed on the extended line of the vertical rib 23 on the lower end surface of the short side wall 14. Alternatively, the support protrusion 27 on the long side wall 13 may be omitted, and the support protrusion 27 may be formed only on the short side wall 14.
[0038]
In the embodiment, two vertical ribs 23 are formed on the long side wall 13, but three or more vertical ribs 23 are formed, and a support protrusion 27 is formed on the lower end surface of the long side wall 13 positioned on the extension line of the vertical ribs 23. It may be formed.
[0039]
-At least one of the blindfold rib 26 and the support protrusion 21 may be omitted. In the embodiment, the blindfold ribs 26 are formed at two positions along the length direction of the long side wall 13 and the support protrusions 27 are formed on both sides of each blindfold rib 26. The support protrusion 27 may be formed only on the outer side of the support rib 27, and the support protrusion 27 on the inner side of the both blindfold ribs 26 may be omitted, and the blindfold rib 26 may be formed between the support protrusions 27.
[0040]
In the embodiment, the blindfold ribs 26 are formed at two positions along the length direction of the long side wall 13, but the blindfold ribs 26 are spaced at three positions along the length direction of the long side wall 13. Alternatively, the support protrusions 27 may be formed on both sides of each blindfold rib 26, and the vertical ribs 23 may be formed on the extension lines of the support protrusions 27. Alternatively, in the blindfold ribs 26 formed at three or more locations, the support protrusions 27 may be formed only on the outside of the blindfold ribs 26 located on both short side walls 14 side.
[0041]
-It forms in mesh shape by penetrating many holes in the wall surface of the bottom wall 12, the long side wall 13, and the short side wall 14 of the container main body 11. FIG. Alternatively, the bottom wall 12 is formed in a mesh shape by penetrating a large number of holes in the wall surface of the bottom wall 12 of the container body 11. Alternatively, the long side wall 13 and the short side wall 14 are formed in a mesh shape by penetrating a large number of holes in the wall surfaces of the long side wall 13 and the short side wall 14 of the container body 11. When comprised in this way, when fruits and vegetables, such as vegetables and fruits, are accommodated in the container main body 11, the decay of the fruits and vegetables can be suppressed effectively.
[0042]
In the embodiment, the long side wall 13 as the first side wall and the short side wall 14 as the second side wall are used. However, the first side wall is the short side wall 14, the second side wall is the long side wall 13, and the pair of short side walls 14 is the bottom wall. The pair of long side walls 13 may be folded on the upper surface of the short side wall 14 after being folded on the top surface of the twelve.
[0043]
Further, the technical idea that can be grasped from the embodiment will be described below.
The bottom wall has support protrusions capable of supporting side walls provided on the side edges at positions along the four side edges of the upper surface, and the support protrusions are continuous in the thickness direction of the side walls. in fold folded type transportation container that is extending form. When comprised in this way, when it rotates to make the side wall in which the support protrusion was formed stand upright, a support protrusion will slidably contact along a support protrusion outer surface. Therefore, the side wall can be rotated by the support protrusion with a certain distance between the side wall and the support protrusion, and the side wall on which the support protrusion is formed can be smoothly erected. .
[0044]
· The projecting length of the support projection is the blindfold ribs in fold folded type transportation container projects that are longer than forming the length of the. In this case, when the side wall on which the support protrusion is formed is turned to stand upright, the blind rib is not brought into contact with the upper surface of the bottom wall by the support protrusion. Therefore, the side wall standing operation can be smoothly performed as compared with the case where the blindfold rib contacts the upper surface of the bottom wall.
[0045]
【The invention's effect】
As described in detail above, the present invention has the following effects.
According to the foldable transport container of the invention described in each claim, it is possible to effectively support the compressive load acting on the container body and prevent deformation of the container body.
[0046]
According to the folding type transportation container of the invention described in claim 2, it is possible to perform the rotating operation industry to upright side walls supporting lifting protrusions are formed smoothly.
[0047]
According to the folding type transportation container of the invention described in claim 3, it is possible to perform the rotating operation industry to upright side walls supporting lifting protrusion is formed even more smoothly.
[Brief description of the drawings]
FIG. 1A is a side view showing a foldable transport container of an embodiment, and FIG. 1B is an enlarged sectional view taken along line 1b-1b of FIG.
FIG. 2 is a front view showing the folding transport container of the embodiment.
FIG. 3 is a partial side view illustrating a contact state between a support protrusion and a support protrusion according to the embodiment.
4A and 4B are partially enlarged views of an assembled state of a long side wall and a short side wall. FIG.
FIG. 5A is a plan view showing a state where the foldable transport container is folded, and FIG. 5B is a side view showing a state where the foldable transport container is folded.
6A is a side view showing a conventional folding transport container, and FIG. 6B is an enlarged sectional view taken along line 6b-6b of FIG. 6A.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Folding type transport container, 11 ... Container main body which comprises a foldable transport container, 12 ... Bottom wall, 13 ... Long side wall as 1st side wall, 14 ... Short side wall as 2nd side wall, 23 ... Vertical rib , 26 ... blindfold ribs, 27 ... support protrusions, 27a ... guide surfaces.

Claims

Rutotomoni formed in a square plate shape, and a bottom wall provided with a support ridge along its four side edges,
A pair of first side walls erected along opposite side edges of the bottom wall;
It is composed of a bottomed square box-like container body provided with a pair of second side walls erected along the opposing other side edges of the bottom wall,
The first side wall and the second side wall are pivotally attached to the support ridge via a rotating means, and the first side wall and the second side wall are erected on the support ridge , and can be assembled. The folding transport container is configured to be foldable by rotating the first side wall and folding it on the upper surface of the bottom wall, and then rotating the second side wall and folding it on the upper surface of the first side wall. And
On the outer surface of at least one of the first side wall and the second side wall, at least two vertical ribs are provided to give each side wall a required rigidity ,
The lower end surface of the side wall located on the extension of at least the longitudinal ribs, the support projections are provided so as to protrude downward, to enable supporting a compressive load acting on the side wall of the container body in the assembled state In addition, the folding transport container in which the lower end edge of the support protrusion is in contact with the upper surface of the support protrusion in the assembled state .

Between the support protrusions, blindfold ribs that make the inside of the container body invisible from between the upper surface of the support protrusion and the side wall lower end surface on which the support protrusion is formed protrude along the lateral direction of each side wall. The support protrusion is formed so that the outer edge of the support protrusion is positioned outside the outer edge of the blindfold rib, and the side wall on which the support protrusion is formed is erected with respect to the support protrusion . After the protrusion comes into contact with the upper surface of the support protrusion , the blindfold rib is configured to be positioned between the upper surface of the support protrusion and the lower end surface of the side wall ,
On the lower end surface of the side wall provided with the blindfold rib, an outer protrusion is formed on the outer side of the blindfold rib along the lateral direction of the sidewall, and the upper end of the outer protrusion is the blindfold in the assembled state. The foldable transport container according to claim 1, wherein the foldable transport container is configured to be positioned above a lower end of the container.

The foldable conveyance device according to claim 1 or 2, wherein an outer end edge of the support protrusion is formed in a curved shape so as to smoothly perform a standing operation on the support protrusion on the side wall on which the support protrusion is formed. container.