JP7134482B2 - folding container - Google Patents

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JP7134482B2
JP7134482B2 JP2018233695A JP2018233695A JP7134482B2 JP 7134482 B2 JP7134482 B2 JP 7134482B2 JP 2018233695 A JP2018233695 A JP 2018233695A JP 2018233695 A JP2018233695 A JP 2018233695A JP 7134482 B2 JP7134482 B2 JP 7134482B2
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wall portion
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寿敏 山内
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Sanko Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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    • Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging

Description

本発明は、物品の運搬等に使用される折畳み容器に関するものである。 The present invention relates to a collapsible container used for transporting articles and the like.

従来、平面視略矩形状をなす底壁部、及び、該底壁部の各側辺部に沿ってそれぞれ上方に突出する土台部を具備する底壁構成部と、各土台部に対して、各土台部の上方に立設される起立位置と、底壁部の上方に寝かされる寝かせ位置との間を回動変位可能に連結された側壁部とを備え、全ての側壁部が起立位置とされた組立状態と、全ての側壁部が寝かせ位置とされた折畳み状態とに状態変化可能な折畳み容器が知られている。 Conventionally, a bottom wall portion having a substantially rectangular shape in a plan view, a bottom wall forming portion including a base portion protruding upward along each side portion of the bottom wall portion, and each base portion, A side wall portion is connected so as to be rotatably displaceable between a standing position erected above each base portion and a lying position laid above the bottom wall portion, and all the side wall portions are in the standing position. Collapsible containers are known which are changeable between an assembled state with all side walls lying down and a folded state with all side walls in a laid-down position.

また、前記折畳み容器の側壁部は、相対する一対の第１側壁部と、相対する一対の第２側壁部とを備え、折畳み容器を折畳み状態から組立状態とする際に、一対の第１側壁部を先に起立位置としてからでないと、第２側壁部を起立位置とすることのできない構成となっている。さらに、第１側壁部の両側部には、第１側壁部の内面から突出し、折畳み容器の組立状態において、第２側壁部の外面と当接して第２側壁部の外方への変位を防止する支持突部が設けられている。加えて、支持突部には、第１側壁部の横幅方向の中央部側に開口する凹部（係合部）が設けられ、第２側壁部の外面側には、折畳み容器の組立状態において係合部に挿入される係合突起が設けられている（例えば、特許文献１等参照。）。 The side walls of the foldable container include a pair of first side walls facing each other and a pair of second side walls facing each other. The second side wall portion cannot be set to the upright position unless the second side wall portion is set to the upright position first. Further, on both side portions of the first side wall portion, protrusions protrude from the inner surface of the first side wall portion and contact the outer surface of the second side wall portion to prevent outward displacement of the second side wall portion in the assembled state of the folding container. A support protrusion is provided for the support. In addition, the support protrusion is provided with a recess (engagement portion) that opens toward the center of the first side wall in the width direction, and the outer surface of the second side wall is engaged with the foldable container in the assembled state. An engaging protrusion inserted into the joint is provided (see, for example, Patent Document 1, etc.).

特開２００１－２８７７３８号公報JP-A-2001-287738

ところで、折畳み容器の折畳み状態における運搬・保管効率に関して、更なる改善等が望まれているのも事実である。 By the way, it is also true that there is a demand for further improvements in the transportation and storage efficiency of the collapsible container in the folded state.

本発明は、上記例示した問題点等を解決するためになされたものであって、その目的は、折畳み状態における高さを低くすることのできる折畳み容器を提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a collapsible container that can be reduced in height when folded.

以下、上記目的等を解決するのに適した各手段につき項分けして説明する。なお、必要に応じて対応する手段に特有の作用効果等を付記する。 Hereinafter, each means suitable for solving the above object will be described separately. It should be noted that actions and effects specific to the corresponding means will be added as necessary.

手段１．平面視略矩形状をなす底壁部、及び、前記底壁部の各側辺部に沿って設けられる土台部を具備する底壁構成部と、
前記底壁構成部の前記各土台部に対して、前記各土台部の上方に立設される起立位置と、前記底壁部の上方に寝かされる寝かせ位置との間を回動変位可能に連結された側壁部とを備え、
全ての前記側壁部が前記起立位置とされた組立状態と、全ての前記側壁部が前記寝かせ位置とされた折畳み状態とに状態変化可能な折畳み容器において、
前記土台部は、前記底壁部の相対する一対の側辺部からそれぞれ上方に突出する相対する一対の第１土台部と、前記第１土台部よりも高さが低く構成された相対する一対の第２土台部とを備え、
前記側壁部は、前記各第１土台部にそれぞれ連結される一対の第１側壁部と、前記各第２土台部にそれぞれ連結される一対の第２側壁部とを備え、
前記折畳み状態から前記組立状態とする場合に、前記一対の第１側壁部を前記起立位置とすることで、前記第２側壁部を前記起立位置とすることが可能な構成において、
前記第１側壁部の両側部には、前記第１側壁部の内面から突出する支持突部が設けられ、
前記組立状態において、前記第２側壁部の外面側が、前記第１側壁部の前記支持突部に当接、又は、近接する構成であって、
前記支持突部には、前記第１側壁部の横幅方向の中央部側に開口する係合部が設けられ、
前記第２側壁部の外面側には、前記組立状態において前記支持突部の前記係合部に挿入される係合突起が設けられ、
前記各支持突部に対応してそれぞれ設けられた前記係合突起のうち少なくとも１つは、前記第２側壁部の側辺部よりも前記第２側壁部の側方に突出して設けられており、
前記第１土台部の内面の一部には、前記第２側壁部を前記寝かせ位置とした場合に、前記第２側壁部の側辺部よりも前記第２側壁部の側方に突出する前記係合突起が挿入される土台凹部が設けられており、
前記土台凹部は、前記起立位置にある前記第１側壁部の内面と平行、又は、ほぼ平行して延びる奥面を備えるとともに、前記組立状態における折畳み容器の内外方向において、前記土台凹部の前記奥面は、前記起立位置にある前記第１側壁部の内面と同じ位置、又は、前記起立位置にある前記第１側壁部の内面よりも折畳み容器の内方側に位置していることを特徴とする折畳み容器。
手段２．前記係合突起は、前記第２側壁部の側辺部の最外側面よりも前記第２側壁部の側方に突出して設けられていることを特徴とする手段１に記載の折畳み容器。 Means 1. a bottom wall forming portion including a bottom wall portion having a substantially rectangular shape in plan view and a base portion provided along each side portion of the bottom wall portion;
With respect to each of the base portions of the bottom wall constituting portion, a standing position erected above each base portion and a lying position lying above the bottom wall portion are connected so as to be rotatably displaceable. and a side wall portion;
In a collapsible container capable of changing its state between an assembled state in which all of the side walls are in the upright position and a folded state in which all of the side walls are in the lying position,
The base portions include a pair of opposing first base portions protruding upward from a pair of opposing side portions of the bottom wall portion, and a pair of opposing base portions configured to be lower in height than the first base portions. and a second base portion of
The side wall portion includes a pair of first side wall portions respectively connected to the respective first base portions, and a pair of second side wall portions respectively connected to the respective second base portions,
In a configuration that allows the second side wall portion to be in the standing position by setting the pair of first side wall portions to the standing position when changing from the folded state to the assembled state,
Both side portions of the first side wall portion are provided with supporting protrusions protruding from the inner surface of the first side wall portion,
In the assembled state, the outer surface side of the second side wall is in contact with or close to the support protrusion of the first side wall,
The supporting protrusion is provided with an engaging portion that opens toward the center of the first side wall in the width direction,
An engaging projection that is inserted into the engaging portion of the supporting projection in the assembled state is provided on the outer surface side of the second side wall,
At least one of the engaging projections provided corresponding to each of the supporting projections is provided to project laterally of the second side wall portion beyond the side edge portion of the second side wall portion. ,
A portion of the inner surface of the first base portion is provided with a portion protruding laterally of the second side wall portion more than the side portion of the second side wall portion when the second side wall portion is in the lying position. A base recess into which the engaging projection is inserted is provided,
The recessed base has a rear surface extending parallel or substantially parallel to the inner surface of the first side wall in the upright position, and the rear surface of the recessed base extends in the inside-outside direction of the folding container in the assembled state. The surface is located at the same position as the inner surface of the first side wall in the upright position, or is positioned on the inner side of the collapsible container relative to the inner surface of the first side wall in the upright position. A collapsible container.
Means 2. The collapsible container according to means 1, wherein the engaging projection is provided so as to protrude laterally of the second side wall portion from the outermost side surface of the side portion of the second side wall portion.

手段１等によれば、係合突起の厚み（第２側壁部の横幅方向における幅）を十分に確保し、かつ、支持突部において、係合部（開口縁）と、支持突部の外周縁部（先端縁部）との間の幅を十分に確保しつつ、支持突部の第１側壁部の内面からの突出長を極力短く抑えることができる。従って、係合突起、及び、支持突部の耐久性の向上を図りつつ、折畳み容器を折畳み状態とした際に、支持突部が折畳み容器の高さを高める要因となってしまうといった事態を抑制することができる。結果として、折畳み容器の組立状態の安定化を図りつつ、折畳み状態とされた折畳み容器の高さを極力低くすることができ、折畳み状態とされた折畳み容器の運搬・保管効率の向上等を図ることができる。特に、物品が収容された組立状態にある折畳み容器の側壁部に手を掛けて折畳み容器を持ち運ぶような構成の場合（側壁部に持ち手があるような場合）には、係合突起、及び、支持突部の耐久性を高めて折畳み容器の組立状態の安定化を図るといった作用効果がより顕著に奏され、物品が収容された折畳み容器をより安定して持ち運ぶことができる。 According to means 1 and the like , the thickness of the engaging projection (the width in the lateral width direction of the second side wall portion) is sufficiently ensured, and the engaging portion (opening edge) and the outside of the supporting projection are separated from each other in the supporting projection. It is possible to minimize the projection length of the support projection from the inner surface of the first side wall portion while ensuring a sufficient width between the peripheral edge portion (tip edge portion). Therefore, while improving the durability of the engaging projections and the supporting projections, it is possible to prevent the supporting projections from increasing the height of the folding container when the folding container is folded. can do. As a result, the height of the folded container can be reduced as much as possible while stabilizing the assembled state of the folded container, and the transportation and storage efficiency of the folded container can be improved. be able to. In particular, in the case of a structure in which the folding container is carried by hand on the side wall portion of the folding container in the assembled state in which the articles are accommodated (when the side wall portion has a handle), the engaging protrusions, and Further, the effect of stabilizing the assembled state of the folding container by increasing the durability of the supporting protrusions is more pronounced, and the folding container containing the articles can be carried more stably.

また、起立位置にある第２側壁部を寝かせ位置とする場合に、係合突起と、第１土台部との干渉を回避させることができる。従って、折畳み容器を折畳み状態とする場合に、係合突起が第１土台部の上面や内面に引っ掛かり、係合突起等が損傷してしまったり、第２側壁部を寝かせ位置まで変位させることができず、折畳み状態とされた折畳み容器の高さが高くなってしまったりする等の事態を防止することができる。さらに、第１土台部のうち土台凹部が設けられることで厚みが比較的薄く構成される部位を第１土台部の延在方向の一部とすることで、第１土台部の強度の低下等を抑止することができる。 Further , when the second side wall portion in the upright position is set to the lying position, it is possible to avoid interference between the engaging projection and the first base portion. Therefore, when the collapsible container is folded, the engaging projections may get caught on the upper surface or the inner surface of the first base portion, and the engaging projections may be damaged or the second side wall portion may be displaced to the lying position. Therefore, it is possible to prevent a situation in which the height of the folding container in the folded state becomes too high. Furthermore, by providing the recessed base portion of the first base portion, the portion of the first base portion that is relatively thin in thickness is part of the extension direction of the first base portion, thereby reducing the strength of the first base portion, etc. can be deterred.

また、折畳み容器の組立状態において、第１側壁部の内面が、第１土台部に設けられた土台凹部の奥面と略面一、又は、前記奥面よりも折畳み容器の外方側に位置するように構成されている。これにより、第２側壁部を起立位置と寝かせ位置とに変位させる場合に、係合突起と、第１側壁部との干渉を回避させることができる。従って、折畳み容器を折畳み状態とする場合に、係合突起が第１側壁部の内面に引っ掛かり、折畳み容器の折畳みや組立てに際しての作業性の低下を招いたり、係合突起等が損傷したりする等の事態を防止することができる。 In addition, in the assembled state of the folding container, the inner surface of the first side wall portion is substantially flush with the inner surface of the base recess provided in the first base portion, or positioned on the outer side of the folding container relative to the inner surface. is configured to Thereby, when displacing the second side wall between the upright position and the lying position, it is possible to avoid interference between the engaging projection and the first side wall. Therefore, when the foldable container is to be folded, the engaging protrusions are caught on the inner surface of the first side wall portion, resulting in reduced workability in folding and assembling the foldable container, or damage to the engaging protrusions. Such situations can be prevented.

組立状態にある折畳み容器を上面側から見た斜視図である。Fig. 2 is a perspective view of the collapsible container in an assembled state as seen from the top side; 組立状態にある折畳み容器を下面側から見た斜視図である。Fig. 2 is a perspective view of the collapsible container in an assembled state as seen from the bottom side; 折畳み状態にある折畳み容器を上面側から見た斜視図である。Fig. 2 is a perspective view of the folding container in a folded state as seen from the top side; 折畳み状態にある折畳み容器を下面側から見た斜視図である。Fig. 2 is a perspective view of the folding container in a folded state as seen from the bottom side; 一方の短辺側側壁部が寝かせ位置にあり、他方の短辺側側壁部が起立位置にある状態の折畳み容器を示す斜視図である。FIG. 4 is a perspective view showing a folding container with one short side wall portion in the laid down position and the other short side wall portion in the upright position; 一方の短辺側側壁部が寝かせ位置にあり、他方の短辺側側壁部が起立位置にある状態の折畳み容器を示す平面図である。FIG. 4 is a plan view showing the folding container with one short side wall portion in the laid down position and the other short side wall portion in the upright position; 一方の短辺側側壁部が寝かせ位置にあり、他方の短辺側側壁部が起立位置にある状態の折畳み容器を示す側面図である。FIG. 4 is a side view showing the collapsible container with one short side wall portion in the laid down position and the other short side wall portion in the upright position; 短辺側側壁部の外面側を示す斜視図である。It is a perspective view which shows the outer surface side of a short-side side wall part. 長辺側側壁部の外面側を示す斜視図である。It is a perspective view which shows the outer surface side of a long-side side wall part. 短辺側側壁部を外面側から見た部分拡大側面図である。It is the partial expansion side view which looked at the short side side wall part from the outer surface side. 長辺側側壁部と、短辺側側壁部との連結部位を図１０のＡ－Ａ線の位置で切断した場合の部分拡大断面図である。FIG. 11 is a partially enlarged cross-sectional view of a connecting portion between a long-side sidewall portion and a short-side sidewall portion taken along line AA in FIG. 10; 組立状態にある折畳み容器の一部断面を含む部分拡大斜視図である。Fig. 2 is a partially enlarged perspective view including a partial cross section of the folding container in an assembled state; 折畳み状態にある折畳み容器の断面図である。Fig. 2 is a cross-sectional view of the collapsible container in the folded state; 折畳み状態にある折畳み容器を段積みした状態を示す側面図である。Fig. 10 is a side view showing a state in which the folding containers in the folded state are stacked. 組立状態にある折畳み容器に対し、折畳み状態にある折畳み容器を載せた状態を示す側面図である。FIG. 10 is a side view showing a state in which the folding container in the folded state is placed on the folding container in the assembled state. 短辺側側壁部を成形する金型を示す部分拡大断面図である。FIG. 4 is a partially enlarged cross-sectional view showing a mold for molding short side wall portions; 別の実施形態における折畳み状態にある折畳み容器を示す部分拡大平面図である。FIG. 11 is a partially enlarged plan view showing a collapsible container in a folded state according to another embodiment;

以下に、一実施形態について図面を参照して説明する。図１、図２等に示すように、折畳み容器１は、平面視略矩形状をなす底壁部３と、底壁部３の各長辺部に沿って底壁部３からそれぞれ上方に突出する長辺側土台部４と、底壁部３の各短辺部に沿って底壁部３からそれぞれ上方に突出する短辺側土台部５とを具備する底壁構成部２を備えている。さらに、折畳み容器１は、各長辺側土台部４に対してそれぞれ回動可能に連結された長辺側側壁部６と、各短辺側土台部５に対してそれぞれ回動可能に連結された短辺側側壁部７とを備えている。本実施形態の底壁構成部２、長辺側側壁部６、及び、短辺側側壁部７は、ポリプロピレンにより構成されている。尚、本実施形態では、短辺側土台部５が第１土台部に相当し、長辺側土台部４が第２土台部に相当し、短辺側側壁部７が第１側壁部に相当し、長辺側側壁部６が第２側壁部に相当する。 An embodiment will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the collapsible container 1 has a bottom wall portion 3 which has a substantially rectangular shape in a plan view, and protrudes upward from the bottom wall portion 3 along each long side of the bottom wall portion 3 . and a short-side base portion 5 projecting upward from the bottom wall portion 3 along each short side portion of the bottom wall portion 3. . Further, the collapsible container 1 is rotatably connected to the long side wall portions 6 and the short side base portions 5, respectively, which are rotatably connected to the long side base portions 4, respectively. and short side wall portions 7 . The bottom wall forming portion 2, the long side wall portions 6, and the short side wall portions 7 of this embodiment are made of polypropylene. In this embodiment, the short-side base portion 5 corresponds to the first base portion, the long-side base portion 4 corresponds to the second base portion, and the short-side side wall portion 7 corresponds to the first side wall portion. The long side wall portion 6 corresponds to the second side wall portion.

また、図１、図３等に示すように、長辺側側壁部６、及び、短辺側側壁部７は、それぞれ長辺側土台部４、及び、短辺側土台部５の上方に立設される起立位置と、底壁部３の中央部側に寝かされる寝かせ位置との間を回動変位可能に構成されている。また、長辺側土台部４の底壁部３からの突出長は、短辺側土台部５の底壁部３からの突出長よりも低くなっており、長辺側側壁部６を回動可能に支持するための長辺側軸受部８の形成位置も、短辺側側壁部７を回動可能に支持するための短辺側軸受部９の形成位置よりも下方に位置している。さらに、短辺側側壁部７の横幅は、底壁構成部２の短手幅の長さとほぼ同じに構成され、長辺側側壁部６の横幅は、一対の短辺側土台部５間の距離とほぼ同じに構成されている。 Further, as shown in FIGS. 1 and 3, the long side wall portion 6 and the short side wall portion 7 stand above the long side base portion 4 and the short side base portion 5, respectively. It is configured to be rotatably displaceable between a standing position provided and a lying position lying on the central portion side of the bottom wall portion 3 . Further, the projection length of the long-side base portion 4 from the bottom wall portion 3 is shorter than the projection length of the short-side base portion 5 from the bottom wall portion 3, and the long-side side wall portion 6 is rotated. The formation position of the long-side bearing portion 8 for rotatably supporting the short-side side wall portion 7 is also located below the formation position of the short-side bearing portion 9 for rotatably supporting the short-side side wall portion 7 . Further, the width of the short side wall portion 7 is configured to be substantially the same as the length of the short side width of the bottom wall forming portion 2 , and the width of the long side side wall portion 6 is the width between the pair of short side base portions 5 . It is configured approximately the same as the distance.

このため、本実施形態では、全ての長辺側側壁部６、及び、短辺側側壁部７が起立位置とされた組立状態（図１参照）にある折畳み容器１を、全ての長辺側側壁部６、及び、短辺側側壁部７が寝かせ位置とされた折畳み状態（図３参照）とする場合には、図５等に示すように、一対の長辺側側壁部６を先に寝かせ位置へと変位させてから、短辺側側壁部７を寝かせ位置へと変位させる構成となっている。そして、図３に示すように、折畳み容器１が折畳み状態とされた場合には、寝かせ位置とされた長辺側側壁部６が底壁部３の上方に重なるとともに、寝かせ位置とされた短辺側側壁部７が長辺側側壁部６の上方に重なるようになっている。 For this reason, in the present embodiment, the folding container 1 in the assembled state (see FIG. 1) in which all the long side wall portions 6 and the short side wall portions 7 are in the upright position is When the side wall portion 6 and the short side wall portion 7 are laid down (see FIG. 3), the pair of long side wall portions 6 are placed first as shown in FIG. After being displaced to the lying position, the short-side side wall portion 7 is displaced to the lying position. As shown in FIG. 3, when the collapsible container 1 is in the folded state, the long-side side walls 6 in the lying position overlap above the bottom wall 3 and the short side in the lying position. The side wall portion 7 overlaps the long side wall portion 6 above.

尚、一対の長辺側土台部４間の距離は、長辺側側壁部６（後述の長辺側ベース板３１）の上下幅の２倍の長さよりも長くなっている。このため、一対の長辺側側壁部６の寝かせ位置の高さが揃うようになっている。さらに、一対の短辺側土台部５間の距離は、短辺側側壁部７（後述の短辺側ベース板１１）の上下幅の２倍の長さよりも若干長くなっている。このため、一対の短辺側側壁部７の寝かせ位置の高さが揃うようになっている。 The distance between the pair of long-side base portions 4 is longer than twice the vertical width of the long-side side wall portion 6 (long-side base plate 31, which will be described later). Therefore, the heights of the pair of long-side side wall portions 6 at the lying position are aligned. Furthermore, the distance between the pair of short-side base portions 5 is slightly longer than twice the vertical width of the short-side sidewall portion 7 (short-side base plate 11 described later). For this reason, the heights of the pair of short-side side wall portions 7 at the lying positions are aligned.

また、図３等に示すように、本実施形態では、短辺側土台部５の両端部から長辺側土台部４の上方に突出し、長辺側土台部４の上面側と連結されている補助凸部１０が設けられている。補助凸部１０により、短辺側土台部５の両端部の強度の向上等が図られている。加えて、図１３等に示すように、寝かせ位置とされた一対の長辺側側壁部６は、両方とも底壁部３の上面に当接して支持され、寝かせ位置とされた一対の短辺側側壁部７は、それぞれ寝かせ位置とされた一対の長辺側側壁部６に当接（又は近接）して、互いに同じ高さ位置で支持されるように構成されている。また、図３等に示すように、短辺側土台部５、及び、補助凸部１０の上辺部（上面）は、寝かせ位置にある短辺側側壁部７よりも上方に位置している。 Further, as shown in FIG. 3 and the like, in the present embodiment, both ends of the short-side base portion 5 protrude above the long-side base portion 4 and are connected to the upper surface side of the long-side base portion 4 . An auxiliary projection 10 is provided. The auxiliary projections 10 are intended to improve the strength of both ends of the short-side base portion 5 . In addition, as shown in FIG. 13 and the like, the pair of long side wall portions 6 in the lying position are both supported in contact with the upper surface of the bottom wall portion 3, and the pair of short sides in the lying position are supported. The side wall portions 7 are configured to abut (or approach) the pair of long side wall portions 6 respectively laid down and supported at the same height position. Further, as shown in FIG. 3 and the like, the short-side base portion 5 and the upper side portions (upper surfaces) of the auxiliary convex portions 10 are located above the short-side side wall portions 7 in the lying position.

図１、図８等に示すように、各短辺側側壁部７は、正面視略矩形状の短辺側ベース板１１と、短辺側ベース板１１の上辺部に沿って、短辺側ベース板１１から外方に突出する短辺側上枠部１２と、短辺側ベース部の下辺部から外方に突出する短辺側下辺リブ１３と、短辺側下辺リブ１３の下面から下方に突出し、短辺側軸受部９に軸支される短辺側ヒンジ部１４とを備えている。短辺側上枠部１２は、短辺側ベース板１１の上辺部から外方に突出する短辺側上辺リブ１２ａと、短辺側上辺リブ１２ａから下方に所定距離を隔てた位置において短辺側上辺リブ１２ａと平行して延びる短辺側上枠下段リブ１２ｂと、短辺側上辺リブ１２ａの下面と、短辺側上枠下段リブ１２ｂの上面との間を連結する短辺側上枠補強リブ１２ｃとを備えている。尚、本実施形態では、短辺側ベース板１１が、第１側壁部を構成する板状体に相当する。 As shown in FIGS. 1 and 8 , each short side wall portion 7 includes a short side base plate 11 having a substantially rectangular shape in a front view and a short side base plate 11 extending along the upper side portion of the short side base plate 11 . Short-side upper frame portion 12 protruding outward from base plate 11, short-side lower side rib 13 protruding outward from the lower side of the short-side base portion, and downward from the lower surface of short-side lower side rib 13. and a short-side hinge portion 14 that protrudes outward and is pivotally supported by the short-side bearing portion 9 . The short-side upper frame portion 12 has a short-side upper rib 12a projecting outward from the upper side portion of the short-side base plate 11, and a short-side upper rib 12a at a position a predetermined distance downward from the short-side upper rib 12a. A short side upper frame lower rib 12b extending parallel to the side upper side rib 12a, and a short side upper frame connecting the lower surface of the short side upper side rib 12a and the upper surface of the short side upper frame lower rib 12b. and a reinforcing rib 12c. Incidentally, in the present embodiment, the short-side base plate 11 corresponds to a plate-like body that constitutes the first side wall portion.

加えて、図５、図７、図８等に示すように、短辺側側壁部７の両側部の上端部を含む上部には、短辺側ベース板１１の内面からそれぞれ内方に突出する支持突部としての係合壁１５が設けられている。各係合壁１５には、短辺側側壁部７の横幅方向において貫通する係合孔部１６（係合部）が設けられている。 In addition, as shown in FIGS. 5, 7, 8, etc., the upper portions including the upper end portions of both side portions of the short side wall portion 7 protrude inward from the inner surface of the short side base plate 11, respectively. An engagement wall 15 is provided as a support protrusion. Each engaging wall 15 is provided with an engaging hole portion 16 (engaging portion) penetrating the short-side side wall portion 7 in the lateral width direction.

さらに、図１、図１０～図１２等に示すように、短辺側ベース板１１には、各係合壁１５、及び、短辺側上枠部１２に近接する位置において、短辺側ベース板１１に対して略コ字状のスリットが形成されることによって、当該スリットで囲まれた部位により構成された弾性片１８と、弾性片１８の先端部から内方に突出する係止突起１９とを備える弾性係止片１７が設けられている。各弾性片１８は、短辺側側壁部７の横幅方向中央部側が短辺側ベース板１１と連結されており、短辺側側壁部７の厚み方向において弾性変形可能に構成されている。弾性片１８の内面は、短辺側ベース板１１の内面と面一であり、係止突起１９は、短辺側ベース板１１の内面よりも内方に突出している。 Further, as shown in FIGS. 1, 10 to 12, etc., the short-side base plate 11 has short-side base plates 15 at positions adjacent to the respective engaging walls 15 and the short-side upper frame portion 12. By forming a substantially U-shaped slit in the plate 11, an elastic piece 18 formed by a portion surrounded by the slit and a locking projection 19 protruding inward from the tip of the elastic piece 18 are formed. An elastic locking piece 17 is provided. Each elastic piece 18 is connected to the short-side base plate 11 at the widthwise central portion of the short-side sidewall portion 7 , and is configured to be elastically deformable in the thickness direction of the short-side sidewall portion 7 . The inner surface of the elastic piece 18 is flush with the inner surface of the short-side base plate 11 , and the locking projection 19 protrudes inward from the inner surface of the short-side base plate 11 .

図１１等に示すように、係止突起１９は、水平断面鋭角状をなしており、係止突起１９のうち、短辺側側壁部７の横幅方向中央部側の面は、短辺側側壁部７の側辺部側に向けて内方に傾斜して延び、係止突起１９のうち短辺側側壁部７の側辺部側の面は、短辺側ベース板１１に対して直交する方向に延びている。さらに、図８等に示すように、弾性係止片１７の外面側には、弾性係止片１７の上辺部、及び、下辺部に沿って延びる係止補強リブ２０が設けられている。加えて、図１１等に示すように、係止突起１９の裏面側（外面側）は、肉抜き形状とされており、前記係止補強リブ２０は、係止突起１９の裏面側にも連結されている。尚、本実施形態の係止補強リブ２０の弾性片１８及び係止突起１９の裏面からの突出長は、弾性係止片１７の短辺側ベース板１１との連結部からの突出方向中間位置を含む部位が、弾性係止片１７の付根部側の部位よりも短く、弾性係止片１７の付根部側の部位よりも、弾性係止片１７の先端部側の部位の方が長くなっている。 As shown in FIG. 11 and the like, the locking projection 19 has an acute-angled horizontal cross-section. The surface of the locking projection 19 on the side of the short side wall portion 7 is perpendicular to the short side base plate 11. extending in the direction Furthermore, as shown in FIG. 8 and the like, on the outer surface side of the elastic locking piece 17, locking reinforcing ribs 20 extending along the upper side and the lower side of the elastic locking piece 17 are provided. In addition, as shown in FIG. 11 and the like, the rear surface side (outer surface side) of the locking projection 19 is hollowed, and the locking reinforcement rib 20 is also connected to the rear surface side of the locking projection 19. It is In addition, the projecting length from the rear surface of the elastic piece 18 and the locking projection 19 of the locking reinforcement rib 20 of this embodiment is the intermediate position in the projecting direction of the elastic locking piece 17 from the connecting portion with the short-side base plate 11 . is shorter than the portion on the root side of the elastic locking piece 17, and the portion on the tip side of the elastic locking piece 17 is longer than the portion on the root side of the elastic locking piece 17. ing.

図８に示すように、短辺側ヒンジ部１４は、短辺側下辺リブ１３の下面から下方に突出するヒンジ本体２１と、短辺側側壁部７の横幅方向におけるヒンジ本体２１の両側面の下端部から側方に突出する一対の軸突部２２とを備えている。尚、短辺側側壁部７の外面側には、各弾性係止片１７の短辺側側壁部７の横幅方向中央部側において、短辺側上枠部１２と、短辺側下辺リブ１３との間を連結する短辺側縦リブ２３が設けられている。さらに、短辺側ベース板１１は、短辺側上枠部１２と、短辺側下辺リブ１３と、左右一対の短辺側縦リブ２３とで囲まれる範囲において、外方に膨出する膨出部２４が設けられている。膨出部２４の外周部は傾斜して延びており、膨出部２４の上面と、短辺側上枠部１２との間、膨出部２４の下面と短辺側下辺リブとの間が適宜リブによって連結されている。本実施形態では、短辺側上枠部１２、短辺側下辺リブ１３、及び、短辺側縦リブ２３の外側端縁、並びに、膨出部２４の外面により、短辺側側壁部７の外面が構成されている。また、短辺側ベース板１１のうち膨出部２４以外の部位の内面により、短辺側側壁部７の内面が構成されている（図５等参照）。尚、短辺側側壁部７の外面と内面との間が短辺側側壁部７の厚みである。 As shown in FIG. 8 , the short-side hinge portion 14 includes a hinge body 21 projecting downward from the lower surface of the short-side lower rib 13 and both side surfaces of the hinge body 21 in the width direction of the short-side side wall portion 7 . It has a pair of shaft projections 22 projecting sideways from the lower end. In addition, on the outer surface side of the short side wall portion 7 , the short side upper frame portion 12 and the short side lower side rib 13 are provided on the lateral width direction central portion side of the short side side wall portion 7 of each elastic locking piece 17 . A short-side vertical rib 23 is provided to connect between. Further, the short-side base plate 11 expands outward in a range surrounded by the short-side upper frame portion 12, the short-side lower rib 13, and the pair of left and right short-side vertical ribs 23. An outlet 24 is provided. The outer peripheral portion of the bulging portion 24 extends obliquely, and the space between the upper surface of the bulging portion 24 and the short-side upper frame portion 12 and between the lower surface of the bulging portion 24 and the short-side lower ribs is They are appropriately connected by ribs. In the present embodiment, the outer edges of the short-side upper frame portion 12, the short-side lower ribs 13, and the short-side vertical ribs 23, and the outer surface of the bulging portion 24 form the short-side sidewall portion 7. The outer surface is configured In addition, the inner surface of the short side wall portion 7 is formed by the inner surface of the portion of the short side base plate 11 other than the bulging portion 24 (see FIG. 5, etc.). The thickness of the short side wall portion 7 is between the outer surface and the inner surface of the short side wall portion 7 .

図１、図９等に示すように、各長辺側側壁部６は、正面視略矩形状の長辺側ベース板３１と、長辺側ベース板３１の上辺部に沿って、長辺側ベース板３１から外方に突出して設けられる長辺側上枠部３２と、長辺側ベース板３１の下辺部から外方に突出する長辺側下辺リブ３３と、長辺側下辺リブ３３の下面から下方に突出し、長辺側軸受部８に軸支される長辺側ヒンジ部３４とを備えている。尚、長辺側上枠部３２についても、短辺側上枠部１２と同様に、上下２列のリブと、当該上下のリブ間を連結するリブとを備えている。さらに、長辺側ベース板３１は、短辺側ベース板１１と同様に、その中央部を含む範囲において外方に膨出する膨出部を備えている。加えて、長辺側ヒンジ部３４は、短辺側ヒンジ部１４と同様に、ヒンジ本体３５、及び、軸突部３６を備えている。尚、本例では、軸突部３６がヒンジ本体３５の片側面側にのみ設けられる長辺側ヒンジ部３４も存在する。また、本実施形態では、長辺側ヒンジ部３４（特に軸突部３６）が軸部を構成する。 As shown in FIGS. 1, 9, etc., each long-side wall portion 6 includes a long-side base plate 31 having a substantially rectangular shape in a front view, and a long-side base plate 31 extending along the upper side of the long-side base plate 31. A long-side upper frame portion 32 protruding outward from the base plate 31, a long-side lower side rib 33 protruding outward from the lower side portion of the long-side base plate 31, and a long-side lower side rib 33. A long-side hinge portion 34 that protrudes downward from the lower surface and is pivotally supported by the long-side bearing portion 8 is provided. It should be noted that the long-side upper frame portion 32 also includes, like the short-side upper frame portion 12, two rows of upper and lower ribs and ribs connecting the upper and lower ribs. Furthermore, the long-side base plate 31, like the short-side base plate 11, has a bulging portion that bulges outward in a range including the central portion thereof. In addition, the long-side hinge portion 34 includes a hinge main body 35 and a shaft protrusion 36 similarly to the short-side hinge portion 14 . In this example, there is also a long-side hinge portion 34 in which the shaft projection 36 is provided only on one side of the hinge body 35 . Further, in the present embodiment, the long-side hinge portion 34 (especially the shaft projection portion 36) constitutes the shaft portion.

また、長辺側側壁部６の両側部の上部には、長辺側ベース板３１の外面から突出する係合突起３７が設けられている。そして、図５のように、短辺側側壁部７を起立位置へと変位させた後、図１のように、長辺側側壁部６を起立位置へと変位させることで、図２に示すように、係合突起３７が、短辺側側壁部７の係合壁１５に設けられた係合孔部１６に挿入されるとともに、図１、図１１等に示すように、係合突起３７の周辺の長辺側側壁部６の外面が、係合壁１５に当接、又は、近接するようになっている。当該構成により、起立位置にある長辺側側壁部６の外側への傾倒変位が防止されるとともに、長辺側側壁部６と、短辺側側壁部７との間の上下方向における位置ずれが防止されるようになっている。 Engagement projections 37 protruding from the outer surface of the long side base plate 31 are provided on the upper portions of both side portions of the long side wall portion 6 . Then, after displacing the short side wall portions 7 to the standing position as shown in FIG. 5, the long side wall portions 6 are displaced to the standing position as shown in FIG. , the engaging projection 37 is inserted into the engaging hole portion 16 provided in the engaging wall 15 of the short side wall portion 7, and as shown in FIGS. The outer surface of the long-side side wall portion 6 on the periphery of the contacting wall 15 abuts on or approaches the engaging wall 15 . With this configuration, tilting displacement of the long side wall portion 6 in the upright position to the outside is prevented, and displacement in the vertical direction between the long side wall portion 6 and the short side wall portion 7 is prevented. It is designed to be prevented.

さらに、長辺側側壁部６が起立位置とされる直前に、長辺側側壁部６の外面の側辺部が、短辺側側壁部７の弾性係止片１７の係止突起１９と接触する。このとき、弾性係止片１７の弾性片１８が外方に弾性変形することにより、長辺側側壁部６をそのまま起立位置へと変位させることができるようになっている。そして、長辺側側壁部６が係止突起１９を越えて起立位置へと変位することで、弾性係止片１７が自身の弾性力で元の姿勢に復帰し、係止突起１９が長辺側側壁部６の長辺側ベース板３１の内面に当接、又は、近接するようになっている。当該構成により、起立位置にある長辺側側壁部６の内方への傾倒変位が防止されるようになっている。 Furthermore, just before the long side wall portion 6 is brought to the upright position, the side portion of the outer surface of the long side wall portion 6 comes into contact with the locking protrusion 19 of the elastic locking piece 17 of the short side wall portion 7 . do. At this time, the elastic piece 18 of the elastic locking piece 17 is elastically deformed outward, so that the long side wall portion 6 can be displaced to the standing position as it is. When the long side wall portion 6 moves over the locking projection 19 and displaces to the upright position, the elastic locking piece 17 returns to its original position by its own elasticity, and the locking projection 19 moves toward the long side. The inner surface of the long-side base plate 31 of the side wall portion 6 is in contact with or comes close to it. This configuration prevents the long side wall portion 6 from tilting inward at the upright position.

尚、図５に示すように、本実施形態では、短辺側側壁部７の両側部において短辺側ベース板１１の内面から係合壁１５のみが内方に突出するという構成ではなく、短辺側ベース板１１の内面の両側部において上下幅方向の全体から内方に若干突出したベース凸部３８が設けられ、ベース凸部３８から係合壁１５が突出するようになっている。短辺側側壁部７の横幅方向において、ベース凸部３８の横幅は、係合壁１５の横幅よりも広く、本実施形態では、長辺側土台部４の厚みと同じ長さとなっている。 As shown in FIG. 5, in the present embodiment, only the engaging walls 15 protrude inward from the inner surface of the short-side base plate 11 on both sides of the short-side side wall portion 7. On both sides of the inner surface of the side base plate 11 , base protrusions 38 are provided that slightly protrude inward from the entire vertical width direction, and the engaging walls 15 protrude from the base protrusions 38 . In the width direction of the short side wall portion 7 , the width of the base protrusion 38 is wider than the width of the engagement wall 15 , and in this embodiment, has the same length as the thickness of the long side base portion 4 .

その一方で、図９に示すように、長辺側側壁部６の係合突起３７は、長辺側ベース板３１の側辺部よりも若干側方に突出している。尚、本実施形態の係合突起３７は、メインとなる係合突起３７と、該係合突起３７よりも下方に位置し、長辺側側壁部６の側辺部側の面、及び、下面が、長辺側側壁部６の外面側に設けられたリブと連結されているサブの係合突起３７とが存在するが、長辺側ベース板３１の側辺部よりも側方に突出するのはメインの係合突起３７（以下、「メイン突起３７Ａ」とも称する）に関する構成となっている。 On the other hand, as shown in FIG. 9 , the engaging protrusions 37 of the long side wall portions 6 project slightly laterally beyond the side portions of the long side base plate 31 . Incidentally, the engaging projections 37 of this embodiment are located below the main engaging projections 37 and the engaging projections 37, and are located on the sides of the long side wall portions 6 and the lower surface. However, there are sub-engagement projections 37 connected to ribs provided on the outer surface of the long-side side wall portion 6 , but they protrude laterally beyond the side portions of the long-side base plate 31 . 1 is related to the main engaging projection 37 (hereinafter also referred to as "main projection 37A").

図５に示すように、短辺側土台部５の内面側には、長辺側側壁部６を寝かせ位置とした場合に、長辺側ベース板３１の側辺部よりも若干側方に突出している係合突起３７（メイン突起３７Ａ）が挿入される土台凹部５Ａが設けられている。すなわち、一対の短辺側土台部５の間の距離は、長辺側ベース板３１の横幅とほぼ同じとなっており（図６等参照）、メイン突起３７Ａを長辺側ベース板３１の側辺部よりも長辺側ベース板３１の側方に突出させてしまうと、長辺側側壁部６を寝かせ位置とする際に、メイン突起３７Ａが短辺側土台部５に干渉することが考えられる。この点、土台凹部５Ａを設けることで、メイン突起３７Ａと、短辺側土台部５との干渉が回避され、メイン突起３７Ａを含む長辺側側壁部６を、一対の短辺側土台部５の間に挿入させられるようになっている。加えて、土台凹部５Ａは、短辺側土台部５の内面うち、一対の長辺側側壁部６が寝かせ位置とされた場合のメイン突起３７Ａに対応する部位にのみ形成されている。このため、基本的には、短辺側土台部５の内面と、寝かせ位置とされた長辺側側壁部６の側面（長辺側ベース板３１の側辺部）とが、当接、又は、近接して配置されている。 As shown in FIG. 5, the inner surface of the short-side base portion 5 protrudes slightly laterally from the side portion of the long-side base plate 31 when the long-side side wall portion 6 is laid down. A base recess 5A into which the engaging projection 37 (main projection 37A) is inserted is provided. That is, the distance between the pair of short-side base portions 5 is substantially the same as the width of the long-side base plate 31 (see FIG. 6, etc.), and the main projection 37A is positioned on the long-side base plate 31 side. If it protrudes laterally of the long-side base plate 31 more than the side portion, the main projection 37A may interfere with the short-side base portion 5 when the long-side side wall portion 6 is laid down. be done. In this regard, by providing the base recessed portion 5A, interference between the main projection 37A and the short-side base portion 5 is avoided, and the long-side sidewall portion 6 including the main projection 37A is separated from the pair of short-side base portions 5A. It is designed to be inserted between In addition, the base recesses 5A are formed only on the inner surface of the short-side base portion 5 at portions corresponding to the main protrusions 37A when the pair of long-side side wall portions 6 are laid down. Therefore, basically, the inner surface of the short-side base portion 5 and the side surface of the long-side side wall portion 6 (the side portion of the long-side base plate 31) in the lying position are in contact with each other, or , are placed in close proximity.

また、図１等に示すように、土台凹部５Ａは、短辺側土台部５の内面よりも外方側に位置し、起立位置にある短辺側側壁部７の内面と平行、又は、ほぼ平行して延びる奥面５Ｂを備えている。尚、本実施形態の土台凹部５Ａは、その下縁部が底壁部３（底板部４１）の上面よりも若干上方に位置しているが、土台凹部５Ａの下縁部が底壁部３（底板部４１）と同じ高さ位置とされてもよい。さらに、本実施形態では、奥面５Ｂの側縁部、及び、下縁部と、短辺側土台部５の内面との間が、奥面５Ｂの周縁部から折畳み容器１の内方側に向けて奥面５Ｂの外周方向に傾斜する傾斜面により連結されているが、短辺側土台部５の内面に対して略直交する面により連結されるように構成してもよい。加えて、メイン突起３７Ａのうち長辺側側壁部６の内面側の部位の形状については、折畳み容器１の折畳み状態において土台凹部５Ａと干渉しない形状とされる。 Further, as shown in FIG. 1 and the like, the base concave portion 5A is located outside the inner surface of the short-side base portion 5 and is parallel to or substantially parallel to the inner surface of the short-side side wall portion 7 in the upright position. It has a rear surface 5B extending in parallel. In this embodiment, the lower edge of the recessed base portion 5A is located slightly above the upper surface of the bottom wall portion 3 (bottom plate portion 41). It may be positioned at the same height as (bottom plate portion 41). Furthermore, in the present embodiment, the side edge and lower edge of the inner surface 5B and the inner surface of the short-side base portion 5 extend inwardly of the folding container 1 from the peripheral edge of the inner surface 5B. Although they are connected by an inclined surface inclined in the outer peripheral direction of the inner surface 5</b>B, they may be connected by a surface substantially orthogonal to the inner surface of the short-side base portion 5 . In addition, the shape of the portion of the main projection 37A on the inner surface side of the long side wall portion 6 is such that it does not interfere with the base recess portion 5A when the foldable container 1 is folded.

さらに、図５に示すように、短辺側側壁部７のうち短辺側ベース板１１の内面よりも内方に突出するベース凸部３８が設けられる係合壁１５の周辺の範囲に関し、長辺側ベース板３１の側辺部よりも側方に突出したメイン突起３７Ａに対応する部位については、かかるメイン突起３７Ａを係合孔部１６に挿入させるべく、ベース凸部３８が省略されるようになっている。より具体的に説明すると、組立状態における折畳み容器１の内外方向において、土台凹部５Ａの奥面５Ｂは、起立位置にある短辺側側壁部７の内面（短辺側ベース板１１の内面）とほぼ同じ位置（同じ位置、又は、奥面５Ｂが短辺側側壁部７の内面よりも若干折畳み容器１の内方側となる設計）とされている。また、上記のように、係合壁１５の周辺部においてベース凸部３８が設けられているが、長辺側側壁部６が開位置と、閉位置との間を変位する際にメイン突起３７Ａが通過することとなるメイン突起３７Ａの軌道上には、メイン突起３７Ａの阻害要因が形成されないように、ベース凸部３８が一部省略されるようになっている（ベース凸部３８に凹部３８Ａが形成され、当該凹部３８Ａが、短辺側側壁部７（短辺側ベース板１１）の内面と面一となる、或いは、短辺側側壁部７の内面よりも若干外方に位置するような格好となる）。 Further, as shown in FIG. 5 , regarding the range around the engagement wall 15 in which the base convex portion 38 projecting inwardly from the inner surface of the short-side base plate 11 of the short-side side wall portion 7 is provided, the length At a portion corresponding to the main protrusion 37A that protrudes laterally from the side portion of the side base plate 31, the base protrusion 38 is omitted so that the main protrusion 37A can be inserted into the engagement hole 16. It has become. More specifically, in the inside-outside direction of the collapsible container 1 in the assembled state, the inner surface 5B of the recessed base 5A is aligned with the inner surface of the short side wall portion 7 (the inner surface of the short side base plate 11) in the upright position. They are located at substantially the same position (or the same position, or a design in which the inner surface 5B is slightly inward of the folding container 1 with respect to the inner surface of the short side wall portion 7). Further, as described above, the base projection 38 is provided in the peripheral portion of the engaging wall 15, but when the long-side sidewall 6 is displaced between the open position and the closed position, the main projection 37A is displaced. A portion of the base projection 38 is omitted on the orbit of the main projection 37A through which the base projection 38A passes so as not to form a hindrance to the main projection 37A. is formed so that the recessed portion 38A is flush with the inner surface of the short side wall portion 7 (short side base plate 11) or positioned slightly outward from the inner surface of the short side wall portion 7. look good).

以上のように、ベース凸部３８により、短辺側側壁部７の両側部の強度向上が図られるとともに、メイン突起３７Ａを長辺側ベース板３１の側辺部よりも側方に突出させることにより、係合壁１５の突出長を大きくすることなく、係合突起３７の横幅を極力大きくしつつ、係合孔部１６の周辺部の強度低下を抑制することができる。さらに、短辺側土台部５の内面側に土台凹部５Ａが設けられるとともに、短辺側側壁部７の内面（少なくとも長辺側側壁部６が開位置と、閉位置との間を変位する際のメイン突起３７Ａの軌道に対応する部位）が、土台凹部５Ａの奥面５Ｂとほぼ面一とされることにより、メイン突起３７Ａを長辺側ベース板３１の側辺部よりも側方に突出させる構成としても、長辺側側壁部６を比較的スムースに回動変位させられるようになっている。尚、組立状態における折畳み容器１の内外方向において、土台凹部５Ａの奥面５Ｂが、起立位置にある短辺側側壁部７の内面よりも折畳み容器１の内方側に位置するように構成することも可能である。 As described above, the strength of both side portions of the short-side side wall portion 7 is improved by the base convex portion 38, and the main protrusion 37A projects laterally beyond the side portions of the long-side base plate 31. As a result, the lateral width of the engaging projection 37 can be increased as much as possible without increasing the projection length of the engaging wall 15, and the reduction in the strength of the peripheral portion of the engaging hole portion 16 can be suppressed. Further, a base recessed portion 5A is provided on the inner surface side of the short-side base portion 5, and the inner surface of the short-side side wall portion 7 (at least when the long-side side wall portion 6 is displaced between the open position and the closed position). (corresponding to the track of the main projection 37A) is substantially flush with the inner surface 5B of the base recess 5A, so that the main projection 37A protrudes more laterally than the side portion of the long-side base plate 31. In this configuration, the long-side side wall portion 6 can be relatively smoothly rotated and displaced. In addition, in the inside and outside directions of the collapsible container 1 in the assembled state, the inner surface 5B of the base recess 5A is configured to be located inward of the collapsible container 1 with respect to the inner surface of the short side wall portion 7 in the upright position. is also possible.

図１、図４、図１３に示すように、底壁構成部２の底壁部３は、略矩形板状の底板部４１と、底板部４１のうち、組立状態にある折畳み容器１同士を上下に積み重ねた（段積みした）場合に、下側の折畳み容器１の側壁部６、７の上辺部に当接して支持される部位である外周対応部４２（底壁部３のうち上面側において長辺側土台部４、及び、短辺側土台部５が設けられている部位）よりも内周側の部位から下方に突出する下面視略格子状の支持部４３とを備えている。当該構成により、組立状態にある折畳み容器１を段積みした場合に、上側の折畳み容器１の支持部４３が、下側の折畳み容器１の側壁部６、７の内周側に挿入されるとともに、上側の折畳み容器１の外周対応部４２が、下側の折畳み容器１の側壁部６、７の上辺部に当接して支持されるようになっている。尚、図１３等に示すように、本実施形態の底板部４１は、外周対応部４２が、その内周側の部位よりも上方に位置するように構成されている。また、本実施形態では、長辺側土台部４、及び、短辺側土台部５の内側空間を成形する金型が、外周対応部４２を介して下方に型抜きされることから、外周対応部４２は、基本的に、リブ状に残存するのみとなっている（図４等参照）。 As shown in FIGS. 1, 4, and 13, the bottom wall portion 3 of the bottom wall forming portion 2 includes a bottom plate portion 41 having a substantially rectangular plate shape, and the bottom plate portion 41 includes the collapsible containers 1 in the assembled state. When the collapsible container 1 is vertically stacked (stacked), the outer periphery corresponding portion 42 (the upper surface side of the bottom wall portion 3) is supported in contact with the upper side portions of the side walls 6 and 7 of the lower collapsible container 1. support portion 43 projecting downward from a portion on the inner peripheral side of the portion where the long-side base portion 4 and the short-side base portion 5 are provided). With this configuration, when the collapsible containers 1 in the assembled state are stacked, the support portions 43 of the upper collapsible container 1 are inserted into the inner peripheral sides of the side walls 6 and 7 of the lower collapsible container 1. , the outer periphery corresponding portion 42 of the upper foldable container 1 is supported in contact with the upper side portions of the side walls 6 and 7 of the lower foldable container 1 . In addition, as shown in FIG. 13 and the like, the bottom plate portion 41 of the present embodiment is configured such that the outer periphery corresponding portion 42 is positioned above the portion on the inner periphery side thereof. In addition, in the present embodiment, the molds for forming the inner spaces of the long-side base portion 4 and the short-side base portion 5 are punched downward via the outer periphery corresponding portion 42, so that The portion 42 basically remains only like a rib (see FIG. 4 and the like).

さらに、図１４に示すように、折畳み状態にある折畳み容器１を段積みした場合には、上側の折畳み容器１の支持部４３が、下側の折畳み容器１の一対の短辺側土台部５の間、かつ、各短辺側土台部５の両端部に対応して設けられた補助凸部１０の間の空間（図３参照）に挿入されるとともに、上側の折畳み容器１の外周対応部４２が、下側の折畳み容器１の短辺側土台部５の上辺部に当接して支持されるようになっている。特に、本実施形態では、折畳み状態にある折畳み容器１を段積みした状態において、上側の折畳み容器１の支持部４３の下面と、下側の折畳み容器１の寝かせ位置とされている短辺側側壁部７のうち上側を向いている外面とが近接（或いは当接）するように構成されている。 Furthermore, as shown in FIG. 14, when the folding containers 1 in the folded state are stacked, the support portions 43 of the upper folding container 1 are placed on the pair of short-side base portions 5 of the lower folding container 1. and inserted into the space (see FIG. 3) between the auxiliary convex portions 10 provided corresponding to both ends of each short side base portion 5, and the outer periphery corresponding portion of the upper folding container 1 42 are in contact with and supported by the upper side portion of the short-side base portion 5 of the lower foldable container 1 . In particular, in this embodiment, when the folding containers 1 in the folded state are stacked, the lower surface of the support portion 43 of the upper folding container 1 and the short side of the lower folding container 1, which is the lying position, are arranged. The outer surface of the side wall portion 7 facing upward is configured to approach (or contact).

図５、図６等に示すように、長辺側軸受部８は、上方、及び、底壁部３の内周側に開口し、長辺側ヒンジ部３４のヒンジ本体３５を挿入可能な挿入部４４と、長辺側ヒンジ部３４の軸突部３６を挿入可能に構成され、軸突部３６の底壁部３の内周側への変位を規制するとともに、軸突部３６の回動変位を許容する軸支部４５とを備えている。また、軸支部４５には、軸支部４５に挿入された軸突部３６の軸支部４５からの抜けを防止する抜け止め突起４６が設けられている。本実施形態では、各長辺側土台部４において、長辺側軸受部８が４つずつ設けられている。 As shown in FIGS. 5 and 6, the long-side bearing portion 8 is opened upward and to the inner peripheral side of the bottom wall portion 3, and is an insert into which the hinge main body 35 of the long-side hinge portion 34 can be inserted. 44 and the shaft projection 36 of the long-side hinge portion 34 can be inserted therein, restricting the displacement of the shaft projection 36 toward the inner peripheral side of the bottom wall portion 3 and rotating the shaft projection 36. and a shaft support portion 45 that allows displacement. Further, the shaft support portion 45 is provided with a retaining protrusion 46 that prevents the shaft protrusion 36 inserted into the shaft support portion 45 from coming off from the shaft support portion 45 . In this embodiment, four long-side bearing portions 8 are provided in each long-side base portion 4 .

尚、短辺側軸受部９についても、長辺側軸受部８と同様に、挿入部４４、軸支部４５、及び、抜け止め突起４６を備えている。本実施形態では、各短辺側土台部５において、短辺側軸受部９が４つずつ設けられている。 The short-side bearing portion 9 also includes an insertion portion 44 , a shaft support portion 45 , and a retainer projection 46 in the same manner as the long-side bearing portion 8 . In this embodiment, four short-side bearing portions 9 are provided in each short-side base portion 5 .

さて、図４、図５等に示すように、底壁構成部２には、長辺側土台部４に対応して、短辺側側壁部７を寝かせ位置とした場合に、短辺側側壁部７の係合壁１５を挿入可能な収容部５１が設けられている。本実施形態の収容部５１は、底壁構成部２の外周側に開口するとともに、底壁構成部２を上下に貫通するようにして設けられている。係合壁１５の厚みは、長辺側土台部４の厚みよりも小さく構成され、係合壁１５が収容部５１に収容された状態では、係合壁１５の外面と、長辺側土台部４の外面とが略面一とされるようになっている。 Now, as shown in FIGS. 4, 5, etc., in the bottom wall-constituting portion 2, when the short-side side wall portion 7 is laid down corresponding to the long-side base portion 4, the short-side side wall A housing portion 51 is provided into which the engagement wall 15 of the portion 7 can be inserted. The accommodating portion 51 of the present embodiment is provided so as to open to the outer peripheral side of the bottom wall-constituting portion 2 and vertically penetrate the bottom wall-constituting portion 2 . The thickness of the engagement wall 15 is configured to be smaller than the thickness of the long-side base portion 4, and when the engagement wall 15 is accommodated in the accommodation portion 51, the outer surface of the engagement wall 15 and the long-side base portion 4 is substantially flush with the outer surface.

また、図５に示すように、長辺側土台部４の上面のうち、寝かせ位置とされた短辺側側壁部７（ベース凸部３８）が載置される部位については、その他の部位よりも若干下方に位置する段部５２となっている。本実施形態では、短辺側側壁部７が寝かせ位置とされることで、短辺側側壁部７の内面側（ベース凸部３８）が、長辺側土台部４の上面（段部５２）に当接して支持されるとともに、収容部５１に挿入された係合壁１５の突出方向先端部（短辺側側壁部７が寝かせ位置にある場合には下側を向いている辺部）が、底壁部３の底板部４１（外周対応部４２）の下面と面一、又は、当該下面よりも若干上方に位置するようになっている（図４、図１４参照）。このため、図１５に示すように、組立状態の折畳み容器１の上側に、折畳み状態の折畳み容器１を載せた場合、上側の折畳み容器１の寝かせ位置とされた短辺側側壁部７の係合壁１５と、下側の折畳み容器１の側壁部６、７の上辺部とが当接、又は、近接するものの、上側の折畳み容器１の係合壁１５が、下側の折畳み容器１の側壁部６、７によって上方に押圧され、上側の折畳み容器１の短辺側側壁部７が、上側の折畳み容器１の底壁構成部２等に対して上方に相対変位させられてしまうといった事態が回避されるようになっている。 Further, as shown in FIG. 5, of the upper surface of the long-side base portion 4, the portion on which the short-side side wall portion 7 (base convex portion 38) placed in the lying position is placed is is also a stepped portion 52 positioned slightly downward. In the present embodiment, the short-side side wall portion 7 is laid down, so that the inner surface side (base convex portion 38) of the short-side side wall portion 7 becomes the upper surface (stepped portion 52) of the long-side base portion 4. , and the projection direction tip of the engaging wall 15 inserted into the housing portion 51 (the side portion facing downward when the short side wall portion 7 is in the lying position) , flush with the bottom surface of the bottom plate portion 41 (periphery corresponding portion 42) of the bottom wall portion 3, or slightly above the bottom surface (see FIGS. 4 and 14). Therefore, as shown in FIG. 15, when the folding container 1 in the folded state is placed on the upper side of the folding container 1 in the assembled state, the side walls 7 on the short sides are engaged with the folding container 1 on the upper side. Although the joint wall 15 and the upper sides of the side walls 6 and 7 of the lower collapsible container 1 abut or approach each other, the engagement wall 15 of the upper collapsible container 1 does not contact the lower collapsible container 1. The side wall portions 6 and 7 press upward, and the short side wall portion 7 of the upper folding container 1 is displaced upward relative to the bottom wall forming portion 2 of the upper folding container 1 and the like. is avoided.

加えて、図１３に示すように、本実施形態では、寝かせ位置とされた短辺側側壁部７の外面（上側を向いている面）、及び、内面（下側を向いている面）が、略水平方向に延びている。また、寝かせ位置とされた長辺側側壁部６の外面、及び、内面についても略水平方向に延びており、寝かせ位置とされた短辺側側壁部７の内面は、寝かせ位置とされた長辺側側壁部６の外面と近接するようになっている。尚、寝かせ位置とされた短辺側側壁部７の内面が、寝かせ位置とされた長辺側側壁部６の外面と当接するように構成することも可能である。但し、寝かせ位置とされた短辺側側壁部７の係合壁１５の突出方向先端部は、外周対応部４２の下面よりも上方に位置したとしても、外周対応部４２の下面からの距離が、底壁構成部２の各部位（収容部５１等）を構成する壁部の肉厚未満とされる。 In addition, as shown in FIG. 13, in this embodiment, the outer surface (upward facing surface) and the inner surface (downward facing surface) of the short side wall portion 7 in the lying position are , extending substantially horizontally. In addition, the outer surface and the inner surface of the long side wall portion 6 at the lying position also extend in the substantially horizontal direction, and the inner surface of the short side wall portion 7 at the lying position extends along the length of the long side wall portion 7 at the lying position. It is arranged to be close to the outer surface of the side wall portion 6 . In addition, it is also possible to configure such that the inner surface of the short side wall portion 7 in the lying position contacts the outer surface of the long side wall portion 6 in the lying position. However, even if the protruding end of the engaging wall 15 of the short-side side wall portion 7 in the lying position is positioned above the lower surface of the outer periphery corresponding portion 42, the distance from the lower surface of the outer periphery corresponding portion 42 is too large. , and less than the wall thickness of each portion of the bottom wall-constituting portion 2 (accommodating portion 51, etc.).

また、図５等に示すように、係合壁１５において、係合孔部１６の周縁部の厚みは、その他の部位の厚みよりも厚く構成されている。さらに、図１１に示すように、本実施形態では、係合壁１５のうち係合孔部１６の周縁部の厚み（Ｗ１）は、短辺側側壁部７を構成する短辺側ベース板１１の厚み（Ｗ２）よりも大きく構成されている。加えて、図５、図６に示すように、長辺側土台部４において、各収容部５１と、長辺側土台部４の両端部（短辺側土台部５）との間にも、長辺側軸受部８が設けられるようになっている。本実施形態では、当該長辺側軸受部８と、収容部５１とが近接配置されており、収容部５１と、長辺側軸受部８との間の距離が、収容部５１の横幅よりも短く、かつ、長辺側軸受部８の横幅よりも短くなっている。 Further, as shown in FIG. 5 and the like, in the engaging wall 15, the peripheral edge portion of the engaging hole portion 16 is configured to be thicker than the other portions. Furthermore, as shown in FIG. 11, in the present embodiment, the thickness (W1) of the peripheral portion of the engaging hole portion 16 of the engaging wall 15 is equal to that of the short side base plate 11 forming the short side wall portion 7. It is configured to be larger than the thickness (W2) of . In addition, as shown in FIGS. 5 and 6, in the long-side base portion 4, between each accommodating portion 51 and both ends of the long-side base portion 4 (short-side base portion 5), A long-side bearing portion 8 is provided. In this embodiment, the long-side bearing portion 8 and the accommodating portion 51 are arranged close to each other, and the distance between the accommodating portion 51 and the long-side bearing portion 8 is larger than the width of the accommodating portion 51. It is short and shorter than the lateral width of the long-side bearing portion 8 .

また、図８、図１０～図１２に示すように、本実施形態の短辺側側壁部７は、弾性係止片１７の折畳み容器１の外方に配置され、折畳み容器１の外方に向けて一定量の変形を行った弾性係止片１７と当接し、それ以上の変形を規制するストッパー部５３を備えている。より具体的に説明すると、短辺側側壁部７には、短辺側側壁部７の外面側の両側部において、短辺側上枠部１２の外側端縁と、短辺側下辺リブ１３の外側端縁との間を連結するコーナー壁部５４が設けられており、ストッパー部５３は、コーナー壁部５４のうち、上下方向において弾性係止片１７に対応する部位から短辺側側壁部７の横幅方向中央部側に突出している。図１１に示すように、ストッパー部５３は、コーナー壁部５４よりも厚肉に構成され、コーナー壁部５４よりも折畳み容器１の内方（弾性係止片１７側）に突出する格好となっている。 Further, as shown in FIGS. 8 and 10 to 12, the short-side side walls 7 of the present embodiment are arranged outside the folding container 1 of the elastic locking pieces 17, and are arranged outside the folding container 1. A stopper portion 53 abuts on the elastic locking piece 17 which has been deformed by a certain amount, and restricts further deformation. More specifically, the short-side sidewall portion 7 has outer edges of the short-side upper frame portion 12 and short-side lower ribs 13 on both sides of the outer surface side of the short-side sidewall portion 7 . A corner wall portion 54 is provided to connect with the outer edge. It protrudes toward the central portion in the lateral width direction. As shown in FIG. 11 , the stopper portion 53 is thicker than the corner wall portion 54 and protrudes inward (toward the elastic locking piece 17 ) of the folding container 1 beyond the corner wall portion 54 . ing.

組立状態にある折畳み容器１を折畳み状態とする際には、折畳み容器１の内側から弾性係止片１７を外方に押圧する。そして、係止突起１９が長辺側側壁部６と当接しなくなる位置まで弾性片１８を弾性変形させることで、弾性係止片１７による長辺側側壁部６の内方への傾倒変位を規制するロック状態が解除され、長辺側側壁部６を寝かせ位置側へと変位可能となる。また、弾性係止片１７を外方に弾性変形させた際に、弾性片１８が一定量の変形を行った場合、ストッパー部５３が、弾性係止片１７の先端部側の外面と当接するようになっている。勿論、ストッパー部５３と弾性係止片１７とが当接する状態では、弾性係止片１７のロック状態が解除された状態とされている上、弾性片１８が弾性限界を超えない程度の変形に収まるようになっている。 When the collapsible container 1 in the assembled state is to be folded, the elastic locking pieces 17 are pushed outward from the inside of the collapsible container 1 . By elastically deforming the elastic pieces 18 to a position where the locking projections 19 are no longer in contact with the long side wall portions 6, the inward tilting displacement of the long side wall portions 6 by the elastic locking pieces 17 is restricted. The locked state is released, and the side walls 6 on the long side can be displaced toward the lying position. Further, when the elastic locking piece 17 is elastically deformed outward, if the elastic piece 18 is deformed by a certain amount, the stopper portion 53 comes into contact with the outer surface of the elastic locking piece 17 on the distal end side. It's like Of course, when the stopper portion 53 and the elastic locking piece 17 are in contact with each other, the locking state of the elastic locking piece 17 is released, and the deformation of the elastic piece 18 does not exceed the elastic limit. It fits.

加えて、図１０、図１１等に示すように、弾性片１８は、短辺側ベース板１１と平行して延び、また、ストッパー部５３についても、短辺側ベース板１１と平行して延びていることから、短辺側側壁部７の厚み方向において、弾性係止片１７の先端部の上下幅方向中央部を含む部位と、ストッパー部５３とが重複して配置される。これにより、弾性変形された弾性係止片１７の先端部側の外面と、ストッパー部５３とが当接し得るように構成されている。さらに、図１０に示すように、ストッパー部５３の上下幅は、弾性係止片１７の上下幅よりも短く、弾性係止片１７が外方に一定量弾性変形した場合に、ストッパー部５３は、弾性片１８の外面のうち、弾性係止片１７の外面側に設けられた上下一対の係止補強リブ２０の間の部位に当接する（係止補強リブ２０には当接しない）ようになっている。 In addition, as shown in FIGS. 10 and 11, the elastic piece 18 extends parallel to the short side base plate 11, and the stopper portion 53 also extends parallel to the short side base plate 11. Therefore, in the thickness direction of the short-side side wall portion 7, the stopper portion 53 overlaps with the portion including the center portion in the vertical width direction of the distal end portion of the elastic locking piece 17. As shown in FIG. As a result, the elastically deformed outer surface of the elastic locking piece 17 on the distal end side and the stopper portion 53 are configured to come into contact with each other. Further, as shown in FIG. 10, the vertical width of the stopper portion 53 is shorter than the vertical width of the elastic locking piece 17, and when the elastic locking piece 17 is elastically deformed outward by a certain amount, the stopper portion 53 is , of the outer surface of the elastic piece 18, so as to abut against a portion between the pair of upper and lower locking reinforcing ribs 20 provided on the outer surface side of the elastic locking piece 17 (do not contact the locking reinforcing rib 20). It's becoming

また、図８、図１１、図１２等に示すように、短辺側側壁部７には、弾性係止片１７と、ストッパー部５３との間の空間を短辺側側壁部７の側方に開口させる開口部５５が設けられている。本実施形態では、弾性係止片１７の上辺部、及び、下辺部とほぼ同じ高さ位置において、コーナー壁部５４と、短辺側ベース板１１との間を連結するコーナー補強リブ５６が設けられるとともに、当該上下一対のコーナー補強リブ５６と、コーナー壁部５４と、短辺側ベース板１１とによって前記開口部５５が区画され、弾性係止片１７と、ストッパー部５３との間の空間と連通するようになっている。また、当該開口部５５は、係合壁１５に設けられた係合孔部１６と同じく、短辺側側壁部７の横幅方向に沿って（水平に）延在している。 8, 11, 12, etc., the short side wall portion 7 is provided with a space between the elastic locking piece 17 and the stopper portion 53 on the side of the short side wall portion 7. As shown in FIGS. An opening 55 is provided to open to the. In the present embodiment, corner reinforcing ribs 56 connecting the corner wall portion 54 and the short-side base plate 11 are provided at substantially the same height positions as the upper side portion and the lower side portion of the elastic locking piece 17 . The opening 55 is partitioned by the pair of upper and lower corner reinforcing ribs 56, the corner wall portion 54, and the short side base plate 11, and the space between the elastic locking piece 17 and the stopper portion 53 is defined. It communicates with Further, the opening 55 extends (horizontally) along the lateral width direction of the short side wall portion 7, like the engaging hole 16 provided in the engaging wall 15. As shown in FIG.

加えて、図１６に示すように、弾性係止片１７と、ストッパー部５３とが対向している部位（弾性係止片１７の先端部側の外面、及び、ストッパー部５３の内面）は、短辺側側壁部７を成形するための金型装置５８において、係合壁１５の外面側や、係合壁１５を貫通する係合孔部１６等を成形する金型５９によって成形される。 In addition, as shown in FIG. 16, the portions where the elastic locking piece 17 and the stopper portion 53 face each other (the outer surface on the tip side of the elastic locking piece 17 and the inner surface of the stopper portion 53) are In a mold device 58 for molding the short side wall portion 7 , molding is performed by a mold 59 for molding the outer surface side of the engagement wall 15 , the engagement hole portion 16 passing through the engagement wall 15 , and the like.

以上詳述したように、本実施形態によれば、各係合壁１５に対応してそれぞれ設けられた上下一対の係合突起３７のうち上側の係合突起３７（メイン突起３７Ａ）は、長辺側側壁部６（長辺側ベース板３１）の側辺部よりも長辺側側壁部６の側方に突出して設けられている。このため、メイン突起３７Ａの厚み（長辺側側壁部６の横幅方向における幅）を十分に確保し、かつ、係合壁１５において、係合孔部１６（開口縁）と、係合壁１５の外周縁部（先端縁部）との間の幅を十分に確保しつつ、係合壁１５の短辺側側壁部７（短辺側ベース板１１）の内面からの突出長を極力短く抑えることができる。従って、メイン突起３７Ａ、及び、係合壁１５の耐久性の向上を図りつつ、折畳み容器１を折畳み状態とした際に、係合壁１５が折畳み容器１の高さを高める要因となってしまうといった事態を抑制することができる。結果として、折畳み容器１の組立状態の安定化を図りつつ、折畳み状態とされた折畳み容器１の高さを極力低くすることができ、折畳み状態とされた折畳み容器１の運搬・保管効率の向上等を図ることができる。特に、物品が収容された組立状態にある折畳み容器１の側壁部６、７に手を掛けて（短辺側上枠部１２、或いは、長辺側上枠部３２を握って）折畳み容器１を持ち運ぶような構成の場合には、係合突起３７、及び、係合壁１５の耐久性を高めて折畳み容器１の組立状態の安定化を図るといった作用効果がより顕著に奏され、物品が収容された折畳み容器１をより安定して持ち運ぶことができる。 As described in detail above, according to the present embodiment, the upper engaging projection 37 (main projection 37A) of the pair of upper and lower engaging projections 37 provided corresponding to each engaging wall 15 is long. It is provided so as to protrude to the side of the long side wall portion 6 from the side portion of the side side wall portion 6 (long side base plate 31). For this reason, the thickness of the main projection 37A (the width in the lateral width direction of the long-side side wall portion 6) is sufficiently ensured, and the engagement wall 15 has the engagement hole portion 16 (opening edge) While sufficiently securing the width between the outer peripheral edge (tip edge) of be able to. Therefore, while improving the durability of the main projection 37A and the engaging wall 15, the engaging wall 15 increases the height of the folding container 1 when the folding container 1 is folded. Such situations can be suppressed. As a result, the height of the folded container 1 can be minimized while stabilizing the assembled state of the folding container 1, and the transportation and storage efficiency of the folding container 1 in the folded state is improved. etc. can be achieved. In particular, when the folding container 1 is placed in an assembled state in which articles are accommodated, the folding container 1 can be folded by holding the side walls 6 and 7 (by gripping the short-side upper frame portion 12 or the long-side upper frame portion 32). In the case of a configuration for carrying the item, the effect of stabilizing the assembled state of the folding container 1 by increasing the durability of the engaging projection 37 and the engaging wall 15 is more remarkably achieved. The accommodated folding container 1 can be carried more stably.

さらに、短辺側土台部５の内面の一部には、長辺側側壁部６を寝かせ位置とした場合に、メイン突起３７Ａが挿入される土台凹部５Ａが設けられている。このため、起立位置にある長辺側側壁部６を寝かせ位置とする場合に、メイン突起３７Ａと、短辺側土台部５との干渉を回避させることができる。従って、折畳み容器１を折畳み状態とする場合に、メイン突起３７Ａが短辺側土台部５の上面や内面に引っ掛かり、メイン突起３７Ａ等が損傷してしまったり、長辺側側壁部６を寝かせ位置まで変位させることができず、折畳み状態とされた折畳み容器１の高さが高くなってしまったりする等の事態を防止することができる。さらに、短辺側土台部５のうち土台凹部５Ａが設けられることで厚みが比較的薄く構成される部位を短辺側土台部５の延在方向の一部とすることで、短辺側土台部５の強度の低下等を抑止することができる。 Further, part of the inner surface of the short-side base portion 5 is provided with a base recess portion 5A into which the main projection 37A is inserted when the long-side side wall portion 6 is laid down. Therefore, when the long side wall portion 6 in the upright position is set to the lying position, interference between the main projection 37A and the short side base portion 5 can be avoided. Therefore, when the collapsible container 1 is folded, the main protrusions 37A may be caught on the upper surface or the inner surface of the short-side base portion 5, causing damage to the main protrusions 37A, etc. Therefore, it is possible to prevent a situation in which the height of the folded container 1 in the folded state is increased. Furthermore, by providing the base recessed portion 5A of the short-side base portion 5 with a relatively thin thickness, a part of the short-side base portion 5 extends in the extending direction. A decrease in the strength of the portion 5 can be suppressed.

加えて、土台凹部５Ａは、起立位置にある短辺側側壁部７の内面と平行、又は、ほぼ平行して延びる奥面５Ｂを備えるとともに、組立状態における折畳み容器１の内外方向において、土台凹部５Ａの奥面５Ｂは、起立位置にある短辺側側壁部７の内面とほぼ同じ位置とされている。つまり、折畳み容器１の組立状態において、短辺側側壁部７の内面が、短辺側土台部５に設けられた土台凹部５Ａの奥面５Ｂと略面一となるように構成されている。これにより、長辺側側壁部６を起立位置と寝かせ位置とに変位させる場合に、メイン突起３７Ａと、短辺側側壁部７との干渉を回避させることができる。従って、折畳み容器１を折畳み状態とする場合に、メイン突起３７Ａが短辺側側壁部７の内面に引っ掛かり、折畳み容器１の折畳みや組立てに際しての作業性の低下を招いたり、メイン突起３７Ａ等が損傷したりする等の事態を防止することができる。 In addition, the recessed base 5A has an inner surface 5B extending parallel or substantially parallel to the inner surface of the short side wall 7 in the upright position. The inner surface 5B of 5A is positioned substantially at the same position as the inner surface of the short side wall portion 7 in the upright position. That is, when the folding container 1 is assembled, the inner surface of the short side wall portion 7 is substantially flush with the inner surface 5B of the base recess portion 5A provided in the short side base portion 5 . Thereby, interference between the main projection 37A and the short side wall portion 7 can be avoided when the long side wall portion 6 is displaced between the upright position and the lying position. Therefore, when folding the collapsible container 1, the main projections 37A are caught on the inner surface of the short-side side wall portion 7, resulting in reduced workability in folding and assembling the collapsible container 1, and the main projections 37A, etc. It is possible to prevent situations such as damage.

また、底壁構成部２には、長辺側土台部４に対応して、寝かせ位置とされた短辺側側壁部７の係合壁１５を挿入可能な収容部５１が、底壁構成部２を上下に貫通するようにして設けられている。このため、底壁構成部２において、寝かせ位置とされた短辺側側壁部７の係合壁１５のうち下方を向いている面に当接して支持するような部位がなくなることとなる。従って、係合壁１５が支持されることによって寝かせ位置にある短辺側側壁部７の高さ位置が決まることを回避することができる。つまり、例えば、収容部５１に底部が設けられる構成に比べ、寝かせ位置にある短辺側側壁部７の係合壁１５を下方に位置させることができ、寝かせ位置にある短辺側側壁部７全体についても極力下方に位置させることができる。従って、寝かせ位置にある短辺側側壁部７のうち上方を向いている面（外面）の高さ位置を低く抑えることができる分、折畳み状態にある折畳み容器１の高さを低くすることができ、特に、折畳み状態にある折畳み容器１を段積みする場合には、段積みされた複数の折畳み容器１の高さを極力低くすることができる。結果として、運搬・保管等に際して、限られた空間の中で段積み可能な折畳み容器１の段数を増やすことができる等、運搬・保管効率の向上等を図ることができる。 Further, in the bottom wall-constituting portion 2, a housing portion 51 into which the engagement wall 15 of the short-side side wall portion 7 in the laid-down position can be inserted is provided corresponding to the long-side base portion 4. 2 is vertically penetrated. Therefore, in the bottom wall forming portion 2, there is no portion that contacts and supports the downward facing surface of the engaging wall 15 of the short-side side wall portion 7 in the lying position. Therefore, it is possible to prevent the height position of the short-side side wall portion 7 in the lying position from being determined by supporting the engaging wall 15 . That is, for example, compared to a configuration in which the housing portion 51 is provided with a bottom portion, the engagement wall 15 of the short side wall portion 7 in the lying position can be positioned downward, and the short side wall portion 7 in the lying position can be positioned downward. The whole can be positioned as low as possible. Therefore, the height position of the upward facing surface (outer surface) of the short-side side wall portion 7 in the lying position can be kept low, so that the height of the folding container 1 in the folded state can be reduced. In particular, when stacking the foldable containers 1 in the folded state, the height of the stacked multiple foldable containers 1 can be minimized. As a result, it is possible to increase the number of foldable containers 1 that can be stacked in a limited space during transportation and storage, thereby improving transportation and storage efficiency.

また、係合壁１５のうち係合孔部１６の周縁部の厚みは、短辺側ベース板１１の厚みよりも大きく構成されている。このため、係合壁１５の強度及び剛性を高めることができ、特に、係合孔部１６の周縁部が変形する等の事態を抑止することができる。従って、上記のように収容部５１が設けられることで、折畳み状態において短辺側側壁部７の係合壁１５が、折畳み容器１の下面側に露出してしまう（長辺側土台部４において寝かせ位置にある短辺側側壁部７の係合壁１５のうち下方を向いている面を保護する部位が存在しない）といった構成においても、係合壁１５の損傷や変形等を抑止することができる。加えて、短辺側ベース板１１のうち、係合壁１５と連結されている部位についても、ベース凸部３８が設けられることで厚肉とされている（図１１参照）ことから、係合壁１５の傾倒変位等を防止することができる。尚、係合壁１５の係合孔部１６の周縁部の厚みは、当該ベース凸部３８が設けられている部位の短辺側ベース板１１の厚みよりも厚くなっている。 Further, the thickness of the peripheral portion of the engaging hole portion 16 in the engaging wall 15 is configured to be larger than the thickness of the short-side base plate 11 . Therefore, the strength and rigidity of the engaging wall 15 can be increased, and in particular, deformation of the peripheral portion of the engaging hole portion 16 can be prevented. Therefore, by providing the accommodation portion 51 as described above, the engagement wall 15 of the short-side side wall portion 7 is exposed to the lower surface side of the folding container 1 in the folded state (in the long-side base portion 4, Even in a configuration such that there is no portion to protect the downward facing surface of the engaging wall 15 of the short-side side wall portion 7 in the lying position, it is possible to suppress damage, deformation, etc. of the engaging wall 15. can. In addition, the portion of the short-side base plate 11 that is connected to the engagement wall 15 is also thickened by providing the base convex portion 38 (see FIG. 11). Tilt displacement and the like of the wall 15 can be prevented. The thickness of the peripheral portion of the engaging hole portion 16 of the engaging wall 15 is thicker than the thickness of the short-side base plate 11 at the portion where the base convex portion 38 is provided.

さらに、上記のように、収容部５１に底部が設けられていないことから、係合壁１５の短辺側側壁部７からの突出長を極力長く確保することができ、ひいては、係合孔部１６が設けられる係合壁１５の強度低下を抑止しつつ、係合突起３７の横幅を極力大きく確保することができる。従って、係合突起３７、及び、係合壁１５の損傷や変形等を抑止し、耐久性の向上等を図ることができる。 Furthermore, as described above, since the housing portion 51 is not provided with a bottom portion, the projection length of the engagement wall 15 from the short-side side wall portion 7 can be ensured as long as possible. It is possible to secure the lateral width of the engaging protrusion 37 as large as possible while suppressing a decrease in the strength of the engaging wall 15 on which the protrusion 16 is provided. Therefore, it is possible to prevent the engaging protrusion 37 and the engaging wall 15 from being damaged or deformed, thereby improving the durability.

加えて、各長辺側土台部４において、各収容部５１と、長辺側土台部４の両端部との間に設けられた長辺側軸受部８と、各収容部５１とが互いに近接して設けられている。このため、収容部５１が設けられることにより低下したその周辺部の強度及び剛性を、長辺側軸受部８、さらには、長辺側軸受部８に連結された長辺側ヒンジ部３４によって補うことができる。 In addition, in each long-side base portion 4, the long-side bearing portions 8 provided between each accommodation portion 51 and both end portions of the long-side base portion 4 and each accommodation portion 51 are close to each other. is provided. For this reason, the strength and rigidity of the peripheral portion, which is reduced due to the provision of the housing portion 51, is compensated for by the long-side bearing portion 8 and the long-side hinge portion 34 connected to the long-side bearing portion 8. be able to.

また、寝かせ位置とされた短辺側側壁部７の係合壁１５のうち下方を向いている面は、収容部５１の下端部と同じ高さ位置、又は、収容部５１の下端部よりも若干上方の高さ位置（収容部５１を構成する壁部の肉厚未満の距離を上方に離れた位置）となるように構成されている。このため、寝かせ位置とされた短辺側側壁部７の係合壁１５が収容部５１から下方に突出することで、係合壁１５が別の部材に接触し易くなる、或いは、組立状態の折畳み容器１の上に折畳み状態の折畳み容器１を載せた場合に、上側の折畳み容器１の係合壁１５に、下側の折畳み容器１の長辺側側壁部６の上辺部が当接して係合壁１５が持ち上がるといった事態を回避することができる。従って、係合壁１５の損傷等を抑制することができる。また、当該構成（寝かせ位置とされた短辺側側壁部７の係合壁１５の下面と、収容部５１の下端部とが同じ高さ位置）を採用した場合においても、例えば、収容部５１に底部が設けられる構成に比べ、底部の厚み分、寝かせ位置とされた短辺側側壁部７の係合壁１５を下方に位置させることができる。従って、寝かせ位置にある短辺側側壁部７を極力下方に位置させる、係合壁１５の短辺側側壁部７からの突出長を極力大きく確保する等の作用効果が確実に奏される。 Further, the downward facing surface of the engaging wall 15 of the short-side side wall portion 7 in the lying position is at the same height as the lower end of the housing portion 51 or higher than the lower end of the housing portion 51 . It is configured to be at a slightly higher height position (a position separated upward by a distance less than the thickness of the wall portion that constitutes the housing portion 51). For this reason, the engaging wall 15 of the short-side side wall portion 7 in the laying position protrudes downward from the housing portion 51, so that the engaging wall 15 easily comes into contact with another member, or is in an assembled state. When the folding container 1 in the folded state is placed on the folding container 1, the upper side portion of the long side wall portion 6 of the lower folding container 1 abuts against the engaging wall 15 of the upper folding container 1. A situation in which the engaging wall 15 is lifted can be avoided. Therefore, damage to the engaging wall 15 can be suppressed. Further, even when this configuration (the lower surface of the engaging wall 15 of the short-side side wall portion 7 in the lying position and the lower end portion of the housing portion 51 are at the same height) is adopted, for example, the housing portion 51 The engaging wall 15 of the short-side side wall portion 7, which is laid down, can be positioned downward by the thickness of the bottom portion, compared to the structure in which the bottom portion is provided at the bottom. Therefore, it is possible to ensure that the short side wall portion 7 in the lying position is positioned as low as possible and that the projection length of the engaging wall 15 from the short side wall portion 7 is secured as much as possible.

尚、上記実施形態の記載内容に限定されず、例えば次のように実施してもよい。勿論、以下において例示しない他の応用例、変更例も当然可能である。 In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other applications and modifications not exemplified below are naturally possible.

（ａ）上記実施形態では、長辺側側壁部６（長辺側ベース板３１）の側辺部が略直線状に構成されているが、例えば、長辺側側壁部６の横幅方向において凹凸が形成されていてもよい。また、メイン突起３７Ａについては、長辺側ベース板３１の側辺部のうち最も長辺側側壁部６の側方側に位置する部位に対応して設けることで、係合壁１５の突出長を極力短くするといった作用効果がより一層奏される。 (a) In the above-described embodiment, the side portions of the long side wall portion 6 (long side base plate 31) are formed in a substantially linear shape. may be formed. Further, the main projection 37A is provided corresponding to a portion of the side portion of the long-side base plate 31 that is closest to the long-side side wall portion 6, so that the projection length of the engaging wall 15 is increased. is as short as possible.

加えて、係合突起３７を挿入して係合させる係合孔部１６が係合壁１５を貫通しない構成（例えば、係合孔部１６のうち短辺側側壁部７の横幅方向の側方側の部位が閉塞され、短辺側側壁部７の横幅方向の中央部に開口する（凹）形状）としてもよいが、貫通させることで、係合突起３７を挿入して係合させる部位を、係合壁１５の外面等を成形する金型５９で成形することができ、金型構造の複雑化を抑止することができる。 In addition, the engagement hole portion 16 into which the engagement projection 37 is inserted and engaged does not penetrate the engagement wall 15 (for example, the engagement hole portion 16 has a lateral width direction side wall portion 7 of the short side wall portion 7). (concave shape) in which the side portion is closed and the widthwise central portion of the short-side side wall portion 7 is opened (concave shape), but by penetrating the short-side side wall portion 7, the portion to be engaged by inserting the engaging projection 37 can be changed. , the outer surface of the engaging wall 15, etc., can be molded by the mold 59, and complication of the mold structure can be suppressed.

また、上下方向における弾性係止片１７の配置は特に限定されるものではないが、ロック状態の安定化や、ロック状態を解除する際の操作性を鑑みると、極力上側に設けることが望ましい。加えて、弾性係止片１７の係止突起１９は肉抜き形状とされているが、そのような凹部を設けないように構成してもよい。さらに、上下方向における係合壁１５の配置についても特に限定されるものではないが、折畳み容器１の組立状態の安定化等を図るべく、極力上側に設けることが望ましい。加えて、上記実施形態では、係合壁１５において厚みが部分的に異なるように構成されているが、いずれも同じ厚みであるように構成してもよい。 Also, the arrangement of the elastic locking piece 17 in the vertical direction is not particularly limited, but it is desirable to provide it as high as possible in view of stabilization of the locked state and operability when releasing the locked state. In addition, although the locking projection 19 of the elastic locking piece 17 is hollowed out, it may be constructed so as not to have such a recess. Further, the arrangement of the engagement wall 15 in the vertical direction is not particularly limited, but it is desirable to provide it as high as possible in order to stabilize the assembled state of the folding container 1 and the like. In addition, in the above-described embodiment, the engaging walls 15 are configured to have partially different thicknesses, but may be configured to have the same thickness.

また、上記実施形態では、ストッパー部５３は、弾性係止片１７の先端部側と当接可能に構成されているが、かかる構成に代えて、又は、加えて、例えば、弾性係止片１７の付根部側（或いは、突出方向中間部位）と当接可能に構成してもよい。さらに、上記実施形態では、弾性係止片１７の弾性片１８は、短辺側側壁部７の横幅方向中央部側の端部が短辺側ベース板１１と連結される構成となっているが、弾性片１８の上端部、又は、下端部が短辺側ベース板１１と連結されるような構成としてもよい。加えて、上記実施形態において、長辺側側壁部６の内面側に対し、弾性係止片１７の係止突起１９を収容可能とする凹部を設けることとしてもよい。 Further, in the above-described embodiment, the stopper portion 53 is configured to be able to abut against the distal end portion side of the elastic locking piece 17, but instead of or in addition to this configuration, for example, the elastic locking piece 17 It may be constructed so as to be able to abut on the root portion side (or the intermediate portion in the projecting direction). Furthermore, in the above-described embodiment, the elastic piece 18 of the elastic locking piece 17 is configured such that the end portion of the short-side side wall portion 7 on the side of the widthwise central portion is connected to the short-side base plate 11 . , the upper end portion or the lower end portion of the elastic piece 18 may be connected to the short-side base plate 11 . In addition, in the above-described embodiment, the inner surface of the long-side side wall portion 6 may be provided with a recess for accommodating the locking projection 19 of the elastic locking piece 17 .

また、上記実施形態では、弾性係止片１７により起立位置にある長辺側側壁部６の内方への傾倒変位を防止するように構成されているが、弾性係止片１７に代えて、例えば、長辺側側壁部６とは別部材として構成され、折畳み容器１が組立状態にある場合に、短辺側側壁部７と係合する係合状態と、係合状態が解除される解除状態とに状態変化可能なロック機構を（折畳み容器１の組立に際して短辺側側壁部７が起立位置とされた後に起立位置とされる）長辺側側壁部６の外面側に設けるような構成を採用することも可能である。 In addition, in the above-described embodiment, the elastic locking piece 17 is configured to prevent the long-side side wall portion 6 from tilting inward in the upright position. For example, it is constructed as a separate member from the long side wall portion 6, and when the collapsible container 1 is in the assembled state, an engagement state in which it engages with the short side wall portion 7 and a release state in which the engagement state is released. A configuration in which a locking mechanism capable of changing between states is provided on the outer surface side of the long side wall portion 6 (which is set to the standing position after the short side wall portion 7 is set to the standing position when assembling the folding container 1). can also be adopted.

（ｂ）上記実施形態では、寝かせ位置とされた短辺側側壁部７の係合壁１５の突出方向先端部（短辺側側壁部７が寝かせ位置にある場合には下側を向いている辺部）が、底壁部３の底板部４１（外周対応部４２）の下面と面一、又は、当該下面よりも若干上方に位置するように構成されているが、寝かせ位置とされた短辺側側壁部７の係合壁１５の突出方向先端部が、底壁構成部２の支持部４３の下面よりも下方に位置することがないように構成されていればよい。但し、収容部５１から下方に突出した係合壁１５に対して別部材が接触するといった事態を抑止するべく、寝かせ位置とされた短辺側側壁部７の係合壁１５は、底壁構成部２のうち収容部５１が設けられている部位の下面である外周対応部４２の下面と面一、或いは、当該下面よりも若干上方に位置することが望ましい。 (b) In the above-described embodiment, the projecting direction tip of the engaging wall 15 of the short side wall portion 7 in the laid position (when the short side wall portion 7 is in the laid position, it faces downward). side portion) is flush with the bottom surface of the bottom plate portion 41 (periphery corresponding portion 42) of the bottom wall portion 3, or is positioned slightly above the bottom surface. It suffices that the end portion of the engaging wall 15 of the side wall portion 7 in the projecting direction is not located below the lower surface of the support portion 43 of the bottom wall forming portion 2 . However, in order to prevent another member from coming into contact with the engaging wall 15 protruding downward from the housing portion 51, the engaging wall 15 of the short-side side wall portion 7 placed in the laid-down position is configured as a bottom wall. It is desirable to be flush with the lower surface of the outer periphery corresponding portion 42, which is the lower surface of the portion of the portion 2 where the accommodating portion 51 is provided, or to be positioned slightly above the lower surface.

（ｃ）上記実施形態では、短辺側土台部５が長辺側土台部４よりも上方にまで突出し、折畳み容器１を折畳み状態から組立状態とする際に、一対の短辺側側壁部７を先に起立位置とさせてから、長辺側側壁部６を起立位置とさせる構成となっているが、長辺側土台部を短辺側土台部よりも上方にまで突出させ、折畳み容器を組立状態とする際には、一対の長辺側側壁部を先に起立位置とさせてから、短辺側側壁部を起立位置とさせるような構成としてもよい。当該構成を採用する場合、長辺側側壁部に係合壁、及び、弾性係止片が設けられ、短辺側土台部に対応して収容部が設けられる。 (c) In the above embodiment, the short-side base portion 5 protrudes upward from the long-side base portion 4, and when the collapsible container 1 is changed from the folded state to the assembled state, the pair of short-side side wall portions 7 is set to the upright position first, and then the long side wall portion 6 is set to the upright position. When assembling, the pair of long side wall portions may be set to the standing position first, and then the short side wall portions may be set to the standing position. When adopting this configuration, engaging walls and elastic locking pieces are provided on the side wall portions on the long sides, and accommodation portions are provided corresponding to the base portions on the short sides.

また、上記実施形態では、寝かせ位置とされた一対の長辺側側壁部６がともに底壁部３の上面に当接し、高さ位置が同じとなるように構成されているが、一対の長辺側側壁部６のうち寝かせ位置とされた一方の長辺側側壁部６の上側に、他方の長辺側側壁部６が寝かせ位置とされて、長辺側側壁部６同士が上下に重なるように構成してもよい。 In the above-described embodiment, the pair of long-side side wall portions 6 in the lying position are both in contact with the upper surface of the bottom wall portion 3, and are configured to have the same height position. The other long side wall portion 6 is laid down on top of one of the long side wall portions 6 laid down, and the long side wall portions 6 overlap each other vertically. It may be configured as

加えて、上記実施形態において、長辺側ヒンジ部３４（長辺側軸受部８）、及び、短辺側ヒンジ部１４（短辺側軸受部９）の数、配置、及び、横幅等については特に限定されるものではなく、適宜変更可能である。但し、長辺側土台部４に設けられた収容部５１の周辺部の強度等を高めるべく、少なくとも収容部５１の一側方の近傍に、長辺側軸受部８が設けられることが望ましい。また、例えば、図１７に示すように、長辺側土台部４の延在方向において収容部５１の両側方の近傍に長辺側軸受部８を設けることとしてもよい。 In addition, in the above embodiment, the number, arrangement, width, etc. of the long-side hinge portions 34 (long-side bearing portions 8) and the short-side hinge portions 14 (short-side bearing portions 9) are It is not particularly limited, and can be changed as appropriate. However, it is desirable that the long-side bearing portion 8 is provided at least near one side of the accommodating portion 51 in order to increase the strength of the periphery of the accommodating portion 51 provided in the long-side base portion 4 . Further, for example, as shown in FIG. 17 , the long-side bearing portions 8 may be provided in the vicinity of both sides of the accommodating portion 51 in the extending direction of the long-side base portion 4 .

（ｄ）上記実施形態での折畳み容器１はポリプロピレンにより構成されているが、ポリエチレン、ＰＥＴ、ポリアミド等その他の樹脂材料により構成されることとしてもよい。 (d) Although the collapsible container 1 in the above embodiment is made of polypropylene, it may be made of other resin materials such as polyethylene, PET, and polyamide.

１…折畳み容器、２…底壁構成部、３…底壁部、４…長辺側土台部、５…短辺側土台部、５Ａ…土台凹部、５Ｂ…奥面、６…長辺側側壁部、７…短辺側側壁部、８…長辺側軸受部、９…短辺側軸受部、１５…係合壁、１６…係合孔部、１７…弾性係止片、３７…係合突起、３７Ａ…メイン突起、５１…収容部、５３…ストッパー部、５５…開口部、５９…金型。 DESCRIPTION OF SYMBOLS 1... Folding container 2... Bottom wall structure part 3... Bottom wall part 4... Long side base part 5... Short side base part 5A... Base recessed part 5B... Back surface 6... Long side side wall Portions 7 Short side wall portion 8 Long side bearing portion 9 Short side bearing portion 15 Engagement wall 16 Engagement hole 17 Elastic locking piece 37 Engagement Projection 37A Main projection 51 Accommodating portion 53 Stopper 55 Opening 59 Mold.

Claims (2)

平面視略矩形状をなす底壁部、及び、前記底壁部の各側辺部に沿って設けられる土台部を具備する底壁構成部と、
前記底壁構成部の前記各土台部に対して、前記各土台部の上方に立設される起立位置と、前記底壁部の上方に寝かされる寝かせ位置との間を回動変位可能に連結された側壁部とを備え、
全ての前記側壁部が前記起立位置とされた組立状態と、全ての前記側壁部が前記寝かせ位置とされた折畳み状態とに状態変化可能な折畳み容器において、
前記土台部は、前記底壁部の相対する一対の側辺部からそれぞれ上方に突出する相対する一対の第１土台部と、前記第１土台部よりも高さが低く構成された相対する一対の第２土台部とを備え、
前記側壁部は、前記各第１土台部にそれぞれ連結される一対の第１側壁部と、前記各第２土台部にそれぞれ連結される一対の第２側壁部とを備え、
前記折畳み状態から前記組立状態とする場合に、前記一対の第１側壁部を前記起立位置とすることで、前記第２側壁部を前記起立位置とすることが可能な構成において、
前記第１側壁部の両側部には、前記第１側壁部の内面から突出する支持突部が設けられ、
前記組立状態において、前記第２側壁部の外面側が、前記第１側壁部の前記支持突部に当接、又は、近接する構成であって、
前記支持突部には、前記第１側壁部の横幅方向の中央部側に開口する係合部が設けられ、
前記第２側壁部の外面側には、前記組立状態において前記支持突部の前記係合部に挿入される係合突起が設けられ、
前記各支持突部に対応してそれぞれ設けられた前記係合突起のうち少なくとも１つは、前記第２側壁部の側辺部よりも前記第２側壁部の側方に突出して設けられており、
前記第１土台部の内面の一部には、前記第２側壁部を前記寝かせ位置とした場合に、前記第２側壁部の側辺部よりも前記第２側壁部の側方に突出する前記係合突起が挿入される土台凹部が設けられており、
前記土台凹部は、前記起立位置にある前記第１側壁部の内面と平行、又は、ほぼ平行して延びる奥面を備えるとともに、前記組立状態における折畳み容器の内外方向において、前記土台凹部の前記奥面は、前記起立位置にある前記第１側壁部の内面と同じ位置、又は、前記起立位置にある前記第１側壁部の内面よりも折畳み容器の内方側に位置している ことを特徴とする折畳み容器。 a bottom wall forming portion including a bottom wall portion having a substantially rectangular shape in plan view and a base portion provided along each side portion of the bottom wall portion;
With respect to each of the base portions of the bottom wall constituting portion, a standing position erected above each base portion and a lying position lying above the bottom wall portion are connected so as to be rotatably displaceable. and a side wall portion;
In a collapsible container capable of changing its state between an assembled state in which all of the side walls are in the upright position and a folded state in which all of the side walls are in the lying position,
The base portions include a pair of opposing first base portions protruding upward from a pair of opposing side portions of the bottom wall portion, and a pair of opposing base portions configured to be lower in height than the first base portions. and a second base portion of
The side wall portion includes a pair of first side wall portions respectively connected to the respective first base portions, and a pair of second side wall portions respectively connected to the respective second base portions,
In a configuration that allows the second side wall portion to be in the standing position by setting the pair of first side wall portions to the standing position when changing from the folded state to the assembled state,
Both side portions of the first side wall portion are provided with supporting protrusions protruding from the inner surface of the first side wall portion,
In the assembled state, the outer surface side of the second side wall is in contact with or close to the support protrusion of the first side wall,
The supporting protrusion is provided with an engaging portion that opens toward the center of the first side wall in the width direction,
An engaging projection that is inserted into the engaging portion of the supporting projection in the assembled state is provided on the outer surface side of the second side wall,
At least one of the engaging projections provided corresponding to each of the supporting projections is provided to project laterally of the second side wall portion beyond the side edge portion of the second side wall portion.cage,
In a part of the inner surface of the first base portion, when the second side wall portion is in the laid down position, said A base recess into which the engaging projection is inserted is provided,
The recessed base has a rear surface extending parallel or substantially parallel to the inner surface of the first side wall in the upright position, and the rear surface of the recessed base extends in the inside-outside direction of the folding container in the assembled state. The surface is located at the same position as the inner surface of the first side wall in the upright position or on the inner side of the collapsible container relative to the inner surface of the first side wall in the upright position. A collapsible container characterized by: 前記係合突起は、前記第２側壁部の側辺部の最外側面よりも前記第２側壁部の側方に突出して設けられていることを特徴とする請求項１に記載の折畳み容器。 2. The collapsible container according to claim 1, wherein said engaging projection is provided so as to protrude laterally of said second side wall portion from the outermost side surface of said side portion of said second side wall portion.
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