JP2013147276A

JP2013147276A - Folding container

Info

Publication number: JP2013147276A
Application number: JP2012009851A
Authority: JP
Inventors: Takashi Owashi; 高司大鷲
Original assignee: Sanko Co Ltd
Current assignee: Sanko Co Ltd
Priority date: 2012-01-20
Filing date: 2012-01-20
Publication date: 2013-08-01
Anticipated expiration: 2032-01-20
Also published as: JP6021139B2

Abstract

PROBLEM TO BE SOLVED: To facilitate assembly work of a folding container including an upper face.SOLUTION: A folding container 10 has a hinge 10H for coupling a second sidewall 70 with an upper face lid 80 disposed at a position except a lateral center portion of the second sidewall 70, and a center protruding piece 86 of a lid outer edge provided on the upper face lid 80 protruding from an upper surface at the lateral center portion of the second sidewall 70 when the upper face lid 80 is fully open. Thus, a finger can be easily put on the center protruding piece 86 of the lid outer edge without raising a leading edge of the second sidewall as before. When the second sidewall 70 is pulled up with the finger put on the center protruding piece 86 of the lid outer edge, the second sidewall 70 can be easily and smoothly changed in attitude from a folding state to a standing state without causing a conventional problem such as a twist of the second sidewall 70. That is, assembly work of the folding container 10 with the upper face lid 80 can be easily implemented.

Description

本発明は、平面形状が四角形の底壁における１対の対向辺に配置された１対の第１側壁と、残り１対の対向辺に配置された１対の第２側壁とが下端部を中心に回動し、第１、第２の側壁の順に底壁の上に重ねられて折畳状態になる折畳コンテナに関する。 In the present invention, a pair of first side walls disposed on a pair of opposed sides of a bottom wall having a quadrangular shape and a pair of second side walls disposed on the other pair of opposed sides have a lower end portion. The present invention relates to a folding container that pivots to the center and is placed on a bottom wall in the order of first and second side walls to be folded.

この種の折畳コンテナとして、例えば、図１７（Ａ）及び図１７（Ｂ）に示すように、折畳状態にしたときに、一方の第２側壁２の上に他方の第２側壁２が重ねられる構造のもの（例えば、特許文献１参照）と、図１８（Ａ）〜図１８（Ｃ）に示すように、１対の第２側壁２，２が、それらの先端同士を突き合わせた状態になるものとが知られている（例えば、特許文献２参照）。 As this type of folding container, for example, as shown in FIGS. 17 (A) and 17 (B), the other second side wall 2 is placed on one second side wall 2 when folded. As shown in FIGS. 18 (A) to 18 (C), a pair of second side walls 2 and 2 are in a state in which their tips are butted against each other. Is known (see, for example, Patent Document 2).

特開２００８−２８００５６号公報（図１〜図３）Japanese Patent Laying-Open No. 2008-280056 (FIGS. 1 to 3) 特開２００６−１６０３１６号公報（図１〜図４）JP 2006-160316 A (FIGS. 1 to 4)

ところで、上記した従来の何れの折畳コンテナも、第２側壁２に上面蓋が取り付けられていない場合には、折畳状態から組立状態にする際に、第２側壁２の外面のリブ２Ｌ（図１７参照）を把持して第２側壁２を容易に起立姿勢にすることができる。ところが、図１８（Ｃ）に示すように、第２側壁２に上面蓋４が取り付けられていると、上面蓋４によって第２側壁２の外面のリブ２Ｌが覆い隠されて持ち手となる部分がなくなるため、第２側壁２の引き起こし作業に手間がかかる。また、上面蓋４の裏面にリブがある場合にそのリブを把持して引き上げると、上面蓋４が第２側壁２に対して自由に回動し得る不安定な状態になり、この場合も第２側壁２の引き起こし作業に手間がかかる。また、第２側壁２の側部に指を掛けて引き上げると、第２側壁２が横に傾いたり、捻れたりしてスムーズに回動しなくなるため、やはりこの場合も第２側壁２の引き起こし作業に手間がかかる。 By the way, when any upper surface lid is not attached to the second side wall 2 in any of the above conventional folding containers, the rib 2L ( 17), the second side wall 2 can be easily put in a standing posture. However, as shown in FIG. 18C, when the upper surface lid 4 is attached to the second side wall 2, the rib 2 L on the outer surface of the second side wall 2 is covered and covered by the upper surface lid 4. Therefore, the work of causing the second side wall 2 is troublesome. Further, when there is a rib on the back surface of the upper surface lid 4, if the rib is gripped and pulled up, the upper surface lid 4 is in an unstable state in which it can freely rotate with respect to the second side wall 2. 2 It takes time and labor to cause the side wall 2 to be raised. Further, if the side wall of the second side wall 2 is lifted by placing a finger, the second side wall 2 tilts sideways or twists and does not rotate smoothly. It takes time and effort.

さらには、図１７に示した折畳コンテナでは、第２側壁２の先端と底壁３から起立した側壁支持突壁５との間が接近していてそれらの間に指を挿入することすらできず、図１８に示した折畳コンテナにおいても、第２側壁２，２の先端同士の間が接近していてそれらの間に指を挿入することすらできない。また、仮に、第２側壁２の先方の隙間に指を挿入することができても、従来の折畳コンテナでは、ヒンジ部２Ｈに掛けた指が滑り、滑らないようにするためにヒンジ部２Ｈの下方に指を潜らせるには第２側壁２の先端を一度浮かせる必要があるので、やはり第２側壁２を引き起こす作業に手間がかかるという問題が生じる。 Further, in the folding container shown in FIG. 17, the tip of the second side wall 2 and the side wall support protruding wall 5 rising from the bottom wall 3 are close to each other, and even a finger can be inserted between them. Even in the folding container shown in FIG. 18, the ends of the second side walls 2 and 2 are close to each other, and even a finger cannot be inserted between them. In addition, even if a finger can be inserted into the gap at the tip of the second side wall 2, in the conventional folding container, the hinge part 2 H is used to prevent the finger hung on the hinge part 2 H from slipping and slipping. Since the tip of the second side wall 2 needs to be lifted once in order to make the finger dive below, there is a problem that it takes time and labor to cause the second side wall 2.

本発明は、上記事情に鑑みてなされたもので、本発明の目的は、上面蓋を備えた折畳コンテナの組立作業を容易に行うことを可能にすることにある。 This invention is made | formed in view of the said situation, and the objective of this invention is enabling it to perform the assembly operation | work of the folding container provided with the upper surface cover easily.

上記目的を達成するためになされた請求項１の発明に係る折畳コンテナは、平面形状が四角形の底壁における１対の対向辺に配置された１対の第１側壁と、残り１対の対向辺に配置された１対の第２側壁とが下端部を中心に回動し、第１、第２の側壁の順に底壁の上に重ねられて折畳状態になる折畳コンテナであって、その上面開口を閉塞するための１対の上面蓋が１対の第２側壁の上面から突出したヒンジ部により１対の第２側壁に回動可能に連結され、各上面蓋が第２側壁の外側面に重ねられた全開状態で第２側壁が折り畳まれる折畳コンテナにおいて、ヒンジ部を第２側壁の横方向の中央部を除いた位置に配置して、上面蓋に、全開状態で第２側壁の横方向の中央部における上面から突出する蓋外縁中央突片を設けたところに特徴を有する。 In order to achieve the above object, a folding container according to the invention of claim 1 includes a pair of first side walls disposed on a pair of opposite sides of a bottom wall having a quadrangular shape, and a pair of remaining ones. A pair of second side walls arranged on opposite sides rotate around the lower end and are folded in a folded state by being stacked on the bottom wall in the order of the first and second side walls. A pair of upper surface lids for closing the upper surface opening are pivotally connected to the pair of second side walls by hinge portions protruding from the upper surfaces of the pair of second side walls, and each upper surface lid is a second one. In the folding container in which the second side wall is folded in the fully opened state superimposed on the outer side surface of the side wall, the hinge part is disposed at a position excluding the central part in the lateral direction of the second side wall, and the top cover is in the fully opened state. It is characterized by the fact that a lid outer edge center protruding piece that protrudes from the upper surface in the lateral center of the second side wall is provided. That.

請求項２の発明は、請求項１に記載の折畳コンテナにおいて、蓋外縁中央突片は、上面蓋を閉じたときに第２側壁の内側又は、第２側壁の上面の内縁側に段付き状に陥没形成された陥没部に収まりかつ蓋外縁中央突片の上面と第２側壁の上面とが面一になるところに特徴を有する。 According to a second aspect of the present invention, in the folding container according to the first aspect, the lid outer edge central protrusion is stepped on the inner side of the second side wall or the inner side of the upper surface of the second side wall when the upper surface lid is closed. It is characterized in that the upper surface of the central projection piece of the lid outer edge and the upper surface of the second side wall are flush with each other in the depressed portion formed in a concave shape.

請求項３の発明は、請求項１又は２に記載の折畳コンテナにおいて、１対の第２側壁は、底壁の外縁部から起立した１対の側壁支持突壁の上で起立状態になると共に、折畳状態にしたときに１対の側壁支持突壁の間で、一方の第２側壁の上に他方の第２側壁が重ねられるように構成され、上面蓋の全開状態で、蓋外縁中央突片が第２側壁の上面から突出する量を、ヒンジ部が第２側壁の上面から突出する量より小さくして、折畳状態にしたときに蓋外縁中央突片と側壁支持突壁との間に、指を挿入可能な指挿入空間が形成されるようにしたところに特徴を有する。 According to a third aspect of the present invention, in the folding container according to the first or second aspect, the pair of second side walls are erected on the pair of side wall support projecting walls erected from the outer edge of the bottom wall. And the other side wall is overlapped on the second side wall between the pair of side wall support projecting walls when in the folded state. The amount of protrusion of the central protrusion from the upper surface of the second side wall is smaller than the amount of protrusion of the hinge part from the upper surface of the second side wall, and the cover outer edge central protrusion and the side wall support protrusion wall when folded. A finger insertion space into which a finger can be inserted is formed between the two.

請求項４の発明は、請求項１又は２に記載の折畳コンテナにおいて、折畳状態にしたときに、１対の第２側壁が、それらの先端同士を突き合わせた状態になるように構成され、上面蓋の全開状態で、蓋外縁中央突片が第２側壁の上面から突出する量を、ヒンジ部が第２側壁の上面から突出する量より小さくして、折畳状態にしたときに両第２側壁の蓋外縁中央突片同士の間に、指を挿入可能な指挿入空間が形成されるようにしたところに特徴を有する。 According to a fourth aspect of the present invention, in the folding container according to the first or second aspect, when the folded container is in a folded state, the pair of second side walls are in a state in which their tips are butted together. When the upper cover is fully opened, the amount of protrusion of the lid outer edge central protrusion from the upper surface of the second side wall is smaller than the amount of protrusion of the hinge part from the upper surface of the second side wall, It is characterized in that a finger insertion space into which a finger can be inserted is formed between the projections on the lid outer edge of the second side wall.

［請求項１の発明］
請求項１の折畳コンテナでは、第２側壁と上面蓋とを連結するヒンジ部が、第２側壁の横方向の中央部を除いた位置に配置され、上面蓋に備えた蓋外縁中央突片が、上面蓋の全開状態で第２側壁の横方向の中央部における上面から突出するので、従来のように第２側壁の先端を浮かせることなく容易に蓋外縁中央突片に指を掛けることができる。そして、蓋外縁中央突片に指を掛けた状態で第２側壁を引き起こせば、第２側壁が捻れる等の従来の問題が生じることなく、容易かつスムーズに第２側壁を折畳状態から起立状態に変更することができる。即ち、本発明によれば、上面蓋を備えた折畳コンテナの組立作業が容易になる。 [Invention of Claim 1]
In the folding container of Claim 1, the hinge part which connects a 2nd side wall and an upper surface lid | cover is arrange | positioned in the position except the center part of the horizontal direction of a 2nd side wall, The lid outer edge center protrusion provided in the upper surface lid | cover However, since the upper lid protrudes from the upper surface at the center portion in the lateral direction of the second side wall in the fully opened state, it is possible to easily put the finger on the lid outer edge central protrusion without floating the tip of the second side wall as in the prior art. it can. Then, if the second side wall is raised with a finger placed on the lid outer edge central protrusion, the second side wall can be easily and smoothly folded from the folded state without causing the conventional problems such as twisting of the second side wall. It can be changed to a standing state. That is, according to the present invention, the assembly work of the folding container provided with the upper surface lid is facilitated.

［請求項２の発明］
請求項２の折畳コンテナでは、蓋外縁中央突片が、上面蓋を閉じたときに第２側壁の内側又は、第２側壁の上面の陥没部に収まりかつ蓋外縁中央突片の上面と第２側壁の上面とが面一になるので、上面蓋を閉じた状態で蓋外縁中央突片が異物に引っ掛かったり、折畳コンテナ同士の積み上げの妨げになることがなくなる。 [Invention of claim 2]
In the folding container according to claim 2, the lid outer edge central projecting piece fits inside the second side wall or the recessed portion of the upper surface of the second side wall when the upper surface lid is closed and Since the upper surfaces of the two side walls are flush with each other, the lid outer edge central protrusion piece is not caught by foreign matter in the state where the upper surface lid is closed, and the stacking of the folding containers is not hindered.

［請求項３の発明］
請求項３の折畳コンテナでは、折畳状態にしたときに１対の第２側壁が１対の側壁支持突壁の間に折り畳まれ、側壁支持突壁と第２側壁のヒンジ部との間に指を挿入する隙間がない場合でも、側壁支持突壁と蓋外縁中央突片との間には、指を挿入可能な指挿入空間が形成されるので、蓋外縁中央突片に指を掛けて第２側壁を容易に折畳状態から起立状態に変更することができる。 [Invention of claim 3]
According to a third aspect of the present invention, when the folded container is folded, the pair of second side walls are folded between the pair of side wall support projecting walls and between the side wall support projecting wall and the hinge portion of the second side wall. Even if there is no gap for inserting a finger, a finger insertion space where a finger can be inserted is formed between the side wall support projection wall and the lid outer edge center protrusion. Thus, the second side wall can be easily changed from the folded state to the standing state.

［請求項４の発明］
請求項４の折畳コンテナでは、折畳状態にしたときに、１対の第２側壁が、それらの先端同士を突き合わせた状態になり、両第２側壁の突き合わされたヒンジ部同士の間に指を挿入する隙間がない場合でも、両第２側壁の蓋外縁中央突片同士の間には、指を挿入可能な指挿入空間が形成されるので、蓋外縁中央突片に指を掛けて第２側壁を容易に折畳状態から起立状態に変更することができる。 [Invention of claim 4]
In the folding container of claim 4, when the folded container is in a folded state, the pair of second side walls are in a state in which their tips are butted against each other, and between the hinge portions where both the second side walls are butted together. Even when there is no gap for inserting a finger, a finger insertion space for inserting a finger is formed between the lid outer edge center protrusions of both the second side walls. The second side wall can be easily changed from the folded state to the standing state.

本発明の一実施形態に係る折畳コンテナの斜視図The perspective view of the folding container which concerns on one Embodiment of this invention 上面扉を開き、一方の第１側壁を畳んだ状態の折畳コンテナの斜視図A perspective view of the folding container with the top door opened and one of the first side walls folded. 両第１側壁を畳み、一方の第２側壁を畳んだ状態の折畳コンテナの斜視図The perspective view of the folding container of the state which folded both the 1st side walls and folded one 2nd side wall 折畳状態の折畳コンテナの斜視図Perspective view of the folded container in the folded state 下端ベースの斜視図Perspective view of the bottom base 下端ベースの一端部の斜視図Perspective view of one end of the lower end base 第２側壁の内面側斜視図Inner side perspective view of the second side wall 第２側壁の外面側斜視図External side perspective view of second side wall 上面扉の外面側斜視図External perspective view of top door 上面扉の内面側斜視図Inner side perspective view of the top door 側面扉を水平姿勢になるまで開いた折畳コンテナの斜視図Perspective view of a folding container with the side doors open to a horizontal position 側面扉を垂下姿勢になるまで開いた折畳コンテナの斜視図Perspective view of a folding container with the side doors open until they hang down 折畳状態の折畳コンテナの一部破断斜視図Partially broken perspective view of a folded folding container 両第１側壁を畳み、一方の第２側壁を畳んだ状態の折畳コンテナの一部破断斜視図A partially broken perspective view of a folding container in a state where both first side walls are folded and one second side wall is folded. 組立状態の折畳コンテナの一部破断斜視図Partially broken perspective view of folding container in assembled state 組立状態の折畳コンテナの一部破断斜視図Partially broken perspective view of folding container in assembled state 従来の折畳コンテナの斜視図Perspective view of a conventional folding container 従来の折畳コンテナの斜視図Perspective view of a conventional folding container

以下、本発明の一実施形態を図１〜図１６に基づいて説明する。図１に示した本実施形態の折畳コンテナ１０は、平面形状が長方形の直方体状をなし、その長方形の１対の短辺部分に本発明に係る１対の第１側壁３０，３０Ｂが配置される一方、１対の長辺部分に本発明に係る１対の第２側壁７０，７０が配置されている。また、それら第１と第２の側壁３０，３０Ｂ，７０，７０の下端部は、折畳コンテナ１０の底部を構成する下端ベース１１に回動可能に連結されている。さらに、１対の第２側壁７０，７０の上端部には、折畳コンテナ１０の上面開口１０Ｋ（図２参照）を開閉するための上面蓋８０，８０が回動可能に連結されている。そして、図２に示すように、上面蓋８０，８０を第２側壁７０の外面に重ねるように開いた全開状態にして、１対の第１側壁３０，３０Ｂを内側に倒してから、図３及び図４に示すように、１対の第２側壁７０，７０の一方と他方とを任意の順番で内側に倒すことで、折畳コンテナ１０全体を折畳状態にすることができる。また、上記した折り畳み操作と逆の順序で第１と第２の側壁３０，３０Ｂ，７０，７０を回動して、折畳コンテナ１０を組立状態にすることができる。 Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The folding container 10 of the present embodiment shown in FIG. 1 has a rectangular parallelepiped shape in plan view, and a pair of first side walls 30 and 30B according to the present invention are disposed on a pair of short sides of the rectangle. On the other hand, a pair of second side walls 70, 70 according to the present invention are disposed on the pair of long side portions. Further, the lower end portions of the first and second side walls 30, 30 B, 70, 70 are rotatably connected to the lower end base 11 constituting the bottom portion of the folding container 10. Furthermore, upper surface lids 80 and 80 for opening and closing the upper surface opening 10K (see FIG. 2) of the folding container 10 are rotatably connected to the upper ends of the pair of second side walls 70 and 70. Then, as shown in FIG. 2, the upper lids 80 and 80 are fully opened so as to overlap the outer surface of the second side wall 70, and the pair of first side walls 30 and 30 B are tilted inward, and then FIG. And as shown in FIG. 4, the folding container 10 whole can be made into a folding state by depressing one side and the other of a pair of 2nd side walls 70 and 70 inside in arbitrary orders. Moreover, the first and second side walls 30, 30B, 70, 70 can be rotated in the reverse order to the above-described folding operation to put the folding container 10 into an assembled state.

以下、折畳コンテナ１０を構成する上記下端ベース１１、第１側壁３０等の各部品の詳細構造について述べる。まず、下端ベース１１について説明する。図５に示すように、下端ベース１１は、長方形の底壁１５の外縁部における１対の長辺部分から１対の側壁支持突壁１２，１２が上方に突出した角溝構造になっている。各側壁支持突壁１２の上面には、その長手方向の中央部と両端部とに第１上面凹部１２Ｂと１対の第２上面凹部１２Ｃ，１２Ｃとが形成され、それら各第２上面凹部１２Ｃと第１上面凹部１２Ｂとの間がそれぞれ上面突部１２Ａになっている。また、各第２上面凹部１２Ｃは、それぞれ側壁支持突壁１２の長手方向の全体の例えば１／１０程度を占め、側壁支持突壁１２の長手方向の残り全体を、１対の上面突部１２Ａ，１２Ａと第１上面凹部１２Ｂとで例えば概ね３等分した大きさになっている。 Hereinafter, the detailed structure of each part, such as the said lower end base 11 and the 1st side wall 30 which comprise the folding container 10, is described. First, the lower end base 11 will be described. As shown in FIG. 5, the lower end base 11 has a rectangular groove structure in which a pair of side wall support projecting walls 12, 12 project upward from a pair of long side portions at the outer edge of the rectangular bottom wall 15. . A first upper surface recess 12B and a pair of second upper surface recesses 12C and 12C are formed on the upper surface of each side wall support protruding wall 12 at the center and both ends in the longitudinal direction, and each of these second upper surface recesses 12C. And the first upper surface recess 12B are upper surface protrusions 12A. Each of the second upper surface recesses 12C occupies, for example, about 1/10 of the entire length in the longitudinal direction of the side wall support projection wall 12, and the entire remaining length in the longitudinal direction of the side wall support projection wall 12 serves as a pair of upper surface projections 12A. , 12A and the first upper surface recess 12B, for example, are roughly divided into three parts.

なお、隣り合った第１上面凹部１２Ｂと上面突部１２Ａとの間、上面突部１２Ａと第２上面凹部１２Ｃとの間が、鉛直面に対してわずかに傾斜した段差面になっている。また、下端ベース１１の下面外縁部のうち上面突部１２Ａ，１２Ａの真下に位置した部分には、第２上面凹部１２Ｃに対する上面突部１２Ａの突出量分だけ下端ベース１１の下面を底上げして下面凹部１５Ｄが形成され、折畳状態の折畳コンテナ１０を積み上げた際に、下側の折畳コンテナ１０の上面突部１２Ａが、上側の折畳コンテナ１０における下面凹部１５Ｄに凹凸係合するようになっている。 Note that a step surface that is slightly inclined with respect to the vertical surface is formed between the adjacent first upper surface recess 12B and the upper surface protrusion 12A, and between the upper surface protrusion 12A and the second upper surface recess 12C. Further, the lower end of the lower end base 11 is raised by the amount of protrusion of the upper surface protrusion 12A with respect to the second upper surface recess 12C at the portion of the lower surface outer edge of the lower end base 11 located directly below the upper surface protrusions 12A, 12A. When the lower surface recess 15D is formed and the folded folding containers 10 are stacked, the upper surface protrusion 12A of the lower folding container 10 engages with the lower surface recess 15D of the upper folding container 10 in an uneven manner. It is like that.

各側壁支持突壁１２のうち第１上面凹部１２Ｂを備えた部分には、その長手方向の中央にアーム受容部１４が設けられ、側壁支持突壁１２のうち上面突部１２Ａ，１２Ａを備えた部分には、その長手方向の両端寄り位置にアーム受容部１４が設けられている。また、側壁支持突壁１２のうち第２上面凹部１２Ｃを備えた部分には、アーム受容部１４は設けられていない。 A portion of each side wall supporting protruding wall 12 having the first upper surface recess 12B is provided with an arm receiving portion 14 at the center in the longitudinal direction, and the side wall supporting protruding wall 12 includes upper surface protruding portions 12A and 12A. The portion is provided with an arm receiving portion 14 at a position near both ends in the longitudinal direction. In addition, the arm receiving portion 14 is not provided in a portion of the side wall supporting protruding wall 12 that includes the second upper surface recess 12C.

図６に示すように、側壁支持突壁１２のうちアーム受容部１４が設けられた部分は、側壁支持突壁１２の厚さ方向で対向した２枚の平板１２Ｇ，１２Ｈを図示しない縦リブで接合すると共に、平板１２Ｇ，１２Ｈの上縁間を支持上面壁１２Ｊで接合した構造をなしている。そして、アーム受容部１４は、側壁支持突壁１２の上面と内側面とに開口して上下方向に延び、その上端寄り位置に段差面１４Ｄを備えている。また、アーム受容部１４のうち段差面１４Ｄより下側は、上側より幅狭の受容本体部１４Ｓになっていて、その受容本体部１４Ｓに関しては、側壁支持突壁１２のうち上面突部１２Ａを備えた部分に配置されたアーム受容部１４も、第２上面凹部１２Ｃを備えた部分に配置されたアーム受容部１４も同じ構造になっている。具体的には、各受容本体部１４Ｓは、内部が側面開口１４Ｂ（側壁支持突壁１２の内側面における開口）より広くなっている。また、受容本体部１４Ｓ内の上端部には、側面開口１４Ｂの両側開口縁に抜け止め突起１４Ｔ，１４Ｔ（図６には、一方の抜け止め突起１４Ｔのみが示されている）が突出形成されている。それら抜け止め突起１４Ｔは、下方に向かうに従って側面開口１４Ｂの開口縁からの突出量が大きくなった略三角形になっている。 As shown in FIG. 6, the portion of the side wall support projecting wall 12 where the arm receiving portion 14 is provided is composed of two flat plates 12G and 12H facing each other in the thickness direction of the side wall support projecting wall 12 by vertical ribs (not shown). In addition to joining, the upper edges of the flat plates 12G and 12H are joined by the support upper surface wall 12J. The arm receiving portion 14 opens to the upper surface and the inner surface of the side wall support protruding wall 12 and extends in the vertical direction, and includes a step surface 14D at a position near the upper end thereof. Further, the lower side of the step surface 14D of the arm receiving portion 14 is a receiving main body portion 14S that is narrower than the upper side, and the upper surface protruding portion 12A of the side wall support protruding wall 12 is connected to the receiving main body portion 14S. The arm receiving portion 14 disposed in the provided portion and the arm receiving portion 14 disposed in the portion including the second upper surface recess 12C have the same structure. Specifically, the interior of each receiving main body portion 14S is wider than the side surface opening 14B (the opening on the inner side surface of the side wall support projecting wall 12). Further, retaining projections 14T and 14T (only one retaining projection 14T is shown in FIG. 6) are formed on the upper end portion of the receiving main body portion 14S so as to protrude from both side opening edges of the side surface opening 14B. ing. These retaining protrusions 14T have a substantially triangular shape in which the protruding amount from the opening edge of the side surface opening 14B increases as it goes downward.

図５に示すように、アーム受容部１４のうち段差面１４Ｄより上側部分は、受容本体部１４Ｓより両側に幅広になっている。そして、側壁支持突壁１２のうち上面突部１２Ａを備えた部分のアーム受容部１４は、図６に示すように、段差面１４Ｄより上側部分に１対のＬ形係止部１４Ｆ，１４Ｆを有している。それらＬ形係止部１４Ｆ，１４Ｆは、段差面１４Ｄより上側でアーム受容部１４の幅方向で対向する１対の対向面から互いに接近する側に張り出し、途中で上方に直角に曲がってアーム受容部１４の上端部まで延びた構造をなしている。また、Ｌ形係止部１４Ｆ，１４Ｆ同士の間隔は、受容本体部１４Ｓの幅より僅かに大きくなっている。なお、側壁支持突壁１２には、Ｌ形係止部１４Ｆ，１４Ｆと段差面１４Ｄとに挟まれた四角形の領域を切除して矩形貫通孔１４Ｋ，１４Ｋが形成されている。一方、側壁支持突壁１２のうち第１上面凹部１２Ｂを備えた部分のアーム受容部１４は、図５に示すように、上記したＬ形係止部１４Ｆも矩形貫通孔１４Ｋを有しない構造になっている。 As shown in FIG. 5, the upper part of the arm receiving part 14 above the step surface 14D is wider on both sides than the receiving body part 14S. As shown in FIG. 6, the arm receiving portion 14 of the side wall supporting protruding wall 12 having the upper surface protruding portion 12A has a pair of L-shaped locking portions 14F, 14F on the upper portion of the step surface 14D. Have. These L-shaped locking portions 14F and 14F project from a pair of facing surfaces facing each other in the width direction of the arm receiving portion 14 above the stepped surface 14D to the side approaching each other, and bend at a right angle in the middle to receive the arm. The structure extends to the upper end of the portion 14. Further, the interval between the L-shaped locking portions 14F, 14F is slightly larger than the width of the receiving body portion 14S. The side wall support protruding wall 12 is formed with rectangular through holes 14K and 14K by cutting out a rectangular region sandwiched between the L-shaped locking portions 14F and 14F and the stepped surface 14D. On the other hand, as shown in FIG. 5, the arm receiving portion 14 of the side wall support protruding wall 12 having the first upper surface recess 12B has a structure in which the above-described L-shaped locking portion 14F does not have the rectangular through hole 14K. It has become.

側壁支持突壁１２のうちアーム受容部１４を備えた部分と、上面突部１２Ａに配置された１対のアーム受容部１４，１４の間は、前記した１対の平板１２Ｇ，１２Ｈを有する２枚板構造になっているが、それ以外の部分は２枚板構造部分の内側の平板１２Ｇと支持上面壁１２Ｊのみを備えて、平板１２Ｇからリブ１２Ｌが突出した構造になっている。また、リブ１２Ｌは、図６に示すように水平に延びた複数の横リブ１２Ｎと、複数の縦リブ１２Ｍとが直交してなる格子構造をなしている。 Between the side wall support projecting wall 12 having the arm receiving portion 14 and the pair of arm receiving portions 14 and 14 disposed on the upper surface projecting portion 12A, the pair of flat plates 12G and 12H are provided. Although it has a plate structure, the other portions are provided with only the flat plate 12G and the support upper surface wall 12J inside the two-plate structure portion, and the rib 12L protrudes from the flat plate 12G. Further, the rib 12L has a lattice structure in which a plurality of horizontal ribs 12N extending horizontally and a plurality of vertical ribs 12M are orthogonal to each other as shown in FIG.

側壁支持突壁１２の長手方向の一端側の第２上面凹部１２Ｃには、係合凹部１６が形成されている。図６に示すように、係合凹部１６は、平板１２Ｇのうち第２上面凹部１２Ｃの中央で１対の縦リブ１２Ｍ，１２Ｍと支持上面壁１２Ｊと横リブ１２Ｎとに囲まれた部分を外側に膨出させてなり、側壁支持突壁１２の上面と内側面とに開放している。また、側壁支持突壁１２の上面における係合凹部１６の開口は、四角形になっていて側壁支持突壁１２の内面側の縁部から側壁支持突壁１２の板厚方向の中間位置に亘る範囲で開口している。さらに、係合凹部１６内で対向した１対の内側面は、下方に向かって互いに接近するように傾斜している。 An engagement recess 16 is formed in the second upper surface recess 12 C on one end side in the longitudinal direction of the side wall support protruding wall 12. As shown in FIG. 6, the engagement recess 16 has an outer portion of the flat plate 12G surrounded by a pair of vertical ribs 12M and 12M, a support upper surface wall 12J, and a lateral rib 12N at the center of the second upper surface recess 12C. And is open to the upper surface and the inner side surface of the side wall support projecting wall 12. Further, the opening of the engaging recess 16 on the upper surface of the side wall support projecting wall 12 has a quadrangular shape and ranges from the edge on the inner surface side of the side wall support projecting wall 12 to the intermediate position in the plate thickness direction of the side wall support projecting wall 12. It is open at. Further, the pair of inner side surfaces facing each other in the engaging recess 16 are inclined so as to approach each other downward.

図５に示すように、第１上面凹部１２Ｂには、その長手方向の両端寄位置にガイド凹部１７，１７が形成されている。図６に示すように、ガイド凹部１７は、支持上面壁１２Ｊの一部を段付き状に陥没させて、その底面を側壁支持突壁１２の板厚方向で湾曲させた構造になっている。 As shown in FIG. 5, guide recesses 17, 17 are formed in the first upper surface recess 12 B at positions near both ends in the longitudinal direction. As shown in FIG. 6, the guide recess 17 has a structure in which a part of the support upper surface wall 12 J is depressed in a stepped shape and its bottom surface is curved in the thickness direction of the side wall support projecting wall 12.

図５に示すように、下端ベース１１の長手方向のうち係合凹部１６が配置されていない側の底壁１５の外縁部からは、側壁支持突壁１２の略１／４の高さの側壁支持突壁１８が突出し、その側壁支持突壁１８の両端部が側壁支持突壁１２，１２の内面に接続されている。また、側壁支持突壁１２，１２のうち側壁支持突壁１８が設けられた側の側縁部からは、内側に向かってサイド係止壁１９，１９が張り出し、それらサイド係止壁１９，１９の下端部が側壁支持突壁１８と一体になっている。さらに、側壁支持突壁１８の長手方向の複数箇所には、上記した受容本体部１４Ｓと同じ構造のアーム受容部１８Ａが設けられている。 As shown in FIG. 5, a side wall of approximately ¼ height of the side wall support projecting wall 12 from the outer edge portion of the bottom wall 15 on the side where the engagement recess 16 is not arranged in the longitudinal direction of the lower end base 11. The support protrusion wall 18 protrudes, and both end portions of the side wall support protrusion wall 18 are connected to the inner surfaces of the side wall support protrusion walls 12 and 12. Further, side locking walls 19, 19 project inward from the side edge portion of the side wall supporting protruding walls 12, 12 where the side wall supporting protruding wall 18 is provided, and these side locking walls 19, 19 Is integrated with the side wall support projecting wall 18. Furthermore, arm receiving portions 18A having the same structure as the receiving main body portion 14S described above are provided at a plurality of locations in the longitudinal direction of the side wall support projecting walls 18.

図６に示すように、下端ベース１１のうち係合凹部１６が配置された側には、底壁１５の端部を段付き状に陥没させてヒンジ用底壁陥没部２０が形成されている。ヒンジ用底壁陥没部２０のうち底壁本体１５Ｈの上面１５Ｓとの間の段差面２０Ｄには、その長手方向の複数位置に係止突部２３が突出形成されている。また、ヒンジ用底壁陥没部２０の底面には、左右方向の両端より位置に１対の底面突部２４，２４が突出形成されている。底面突部２４は、ヒンジ用底壁陥没部２０の底壁の一部を直方体状に膨出させた構造になっている。 As shown in FIG. 6, on the side of the lower end base 11 where the engaging recess 16 is disposed, the end of the bottom wall 15 is recessed in a stepped shape to form a bottom wall recessed portion 20 for hinges. . On the step surface 20D between the bottom wall recessed portion 20 for hinges and the upper surface 15S of the bottom wall main body 15H, locking projections 23 are formed to project at a plurality of positions in the longitudinal direction. In addition, a pair of bottom surface protrusions 24, 24 protrude from the bottom surface of the hinge bottom wall recess 20 at positions from both ends in the left-right direction. The bottom projection 24 has a structure in which a part of the bottom wall of the hinge bottom wall depression 20 is bulged into a rectangular parallelepiped shape.

次に、第１側壁３０，３０Ｂについて説明する。以下、特記しない限り、第１側壁３０，３０Ｂの上下方向、上端部、下端部等は、第１側壁３０，３０Ｂが起立姿勢である場合における第１側壁３０，３０Ｂの上下方向、上端部、下端部等を指すものとする。後述する第２側壁７０においても同様である。 Next, the first side walls 30 and 30B will be described. Hereinafter, unless otherwise specified, the vertical direction, the upper end, the lower end, and the like of the first side walls 30, 30B are the vertical direction, the upper end, and the first side walls 30, 30B when the first side walls 30, 30B are in the standing posture. The lower end part etc. shall be pointed out. The same applies to the second side wall 70 described later.

１対の第１側壁３０，３０Ｂは、互いに構造が異なる。まず、下端ベース１１のうちヒンジ用底壁陥没部２０を備えた側の端部に取り付けられる第１側壁３０について説明する。図１１に示すように、第１側壁３０は、折畳コンテナ１０から荷物を出し入れするための側壁開口３０Ｗを備えた枠状の第１側壁本体３０Ｈに、側壁開口３０Ｗを開閉するための側面扉４０を組み付けた構造になっている。 The pair of first side walls 30 and 30B have different structures. First, the 1st side wall 30 attached to the edge part of the side provided with the bottom wall recessed part 20 for hinges among the lower end bases 11 is demonstrated. As shown in FIG. 11, the first side wall 30 is a side door for opening and closing the side wall opening 30 W to a frame-shaped first side wall body 30 H provided with a side wall opening 30 W for taking in and out the luggage from the folding container 10. 40 is assembled.

第１側壁本体３０Ｈの底辺を構成する底辺構成壁３８の一部は、第１側壁本体３０Ｈ全体より折畳コンテナ１０の内側に突出したヒンジ用側壁突部３５になってる。そして、そのヒンジ用側壁突部３５には、上記した下端ベース１１の複数の係止突部２３（図６参照）を受容するための複数の突部受容部３５Ａが形成されている。また、底辺構成壁３８の下面には、図２に示すように、底面突部２４，２４と凹凸嵌合する１対の下面係合凹部３８Ａ，３８Ａが陥没形成されている。そして、底面突部２４と段差面２０Ｄとの間にヒンジ用側壁突部３５の一部が挟まれ、係止突部２３（図６参照）と上記した突部受容部３５Ａの下端部に備えた図示しない突部係止部との係合によってヒンジ用側壁突部３５の上方への移動が規制されて、第１側壁本体３０Ｈの下端部が下端ベース１１に回動可能に連結されている。 A part of the bottom side constituting wall 38 constituting the bottom side of the first side wall main body 30H is a hinge side wall protruding portion 35 that protrudes to the inside of the folding container 10 from the entire first side wall main body 30H. The hinge side wall protrusion 35 is formed with a plurality of protrusion receiving portions 35A for receiving the plurality of locking protrusions 23 (see FIG. 6) of the lower end base 11 described above. Further, as shown in FIG. 2, a pair of lower surface engaging recesses 38 A and 38 A that are concavo-convexly engaged with the bottom surface protrusions 24 and 24 are formed in the lower surface of the bottom side configuration wall 38. A part of the hinge side wall protrusion 35 is sandwiched between the bottom surface protrusion 24 and the step surface 20D, and is provided at the lower end of the locking protrusion 23 (see FIG. 6) and the above-described protrusion receiving part 35A. The upward movement of the hinge side wall projection 35 is restricted by the engagement with a projection locking portion (not shown), and the lower end portion of the first side wall body 30H is rotatably connected to the lower end base 11. .

図１に示すように、第１側壁本体３０Ｈの底辺構成壁３８には、外面と上面とに開放した１対の扉ヒンジ用凹部３７，３７が形成され、これらに対応させて側面扉４０の下縁部には、下面と外面とに開放した１対の扉ヒンジ用凹部４１，４１が形成されている。また、各扉ヒンジ用凹部３７，４１の両内側面には、図示しない軸支孔が形成されている。そして、上下で並んだ扉ヒンジ用凹部３７，４１の連通空間に回動中継部材５０が収容されて、その回動中継部材５０の上端部に備えた図示しない第１回動シャフトの両端部が扉ヒンジ用凹部４１の軸支孔に挿通される一方、回動中継部材５０の下端部に備えた図示しない第２回動シャフトの両端部が扉ヒンジ用凹部３７の軸支孔に挿通されている。これにより、図１２に示すように、側面扉４０を下端ベース１１の下方に垂れた垂下姿勢になるまで開くことができる。 As shown in FIG. 1, the bottom side constituting wall 38 of the first side wall main body 30H is formed with a pair of door hinge recesses 37, 37 that are open to the outer surface and the upper surface, and the side door 40 has a pair of recesses 37 corresponding thereto. On the lower edge portion, a pair of door hinge recesses 41, 41 are formed open to the lower surface and the outer surface. Further, shaft support holes (not shown) are formed on both inner side surfaces of the door hinge recesses 37 and 41. Then, the rotation relay member 50 is accommodated in the communication space of the door hinge recesses 37 and 41 aligned vertically, and both end portions of the first rotation shaft (not shown) provided at the upper end portion of the rotation relay member 50 are provided. While being inserted through the shaft support hole of the door hinge recess 41, both ends of a second rotation shaft (not shown) provided at the lower end of the rotation relay member 50 are inserted into the shaft support hole of the door hinge recess 37. Yes. As a result, as shown in FIG. 12, the side door 40 can be opened until the side door 40 is in a hanging position hanging below the lower end base 11.

図１に示すように、側面扉４０の上端部には、閉止解除操作部材４３Ｈが上下動可能に取り付けられ、図示しない弾性部材によって閉止解除操作部材４３Ｈが上方に付勢されている。また、閉止解除操作部材４３Ｈから両側方に閉止部材４３，４３が突出していて、図１１に示した第１側壁本体３０Ｈの閉止突起３４，３４に係止することで側面扉４０を閉止状態に保持することができる。そして、閉止解除操作部材４３Ｈに備えた指掛部４３Ａに指をかけて押し下げ、側面扉４０を開くことができる。 As shown in FIG. 1, a closing release operating member 43H is attached to an upper end portion of the side door 40 so as to be movable up and down, and the closing release operating member 43H is urged upward by an elastic member (not shown). Moreover, the closing members 43 and 43 protrude from the closing release operation member 43H on both sides, and the side door 40 is brought into a closed state by being engaged with the closing protrusions 34 and 34 of the first side wall body 30H shown in FIG. Can be held. Then, the side door 40 can be opened by pushing the finger hooking portion 43 A provided in the closing release operation member 43 H with a finger.

第１側壁本体３０Ｈの両側縁部における上端部には、複数の第１側壁連結突部３１（図１１参照）が突出形成されている。そして、後述する第２側壁７０の複数の係合孔７２Ａ（図７参照）にこれら第１側壁連結突部３１が凹凸係合する。また、第１側壁本体３０Ｈの上縁部には１対の係合凹部３０Ｋ，３０Ｋが形成され、後述する上面蓋８０の側壁係止突部８９，８９がこれら係合凹部３０Ｋ，３０Ｋに凹凸係合する。 A plurality of first side wall connection protrusions 31 (see FIG. 11) are formed to project from the upper end portions at both side edges of the first side wall body 30H. And these 1st side wall connection protrusion parts 31 carry out uneven | corrugated engagement to several engagement hole 72A (refer FIG. 7) of the 2nd side wall 70 mentioned later. Further, a pair of engaging recesses 30K and 30K are formed on the upper edge of the first side wall body 30H, and side wall locking projections 89 and 89 of the upper surface lid 80 described later are uneven on the engaging recesses 30K and 30K. Engage.

次に、第１側壁３０Ｂについて説明する。第１側壁３０Ｂは、図２に一部が示されており、側壁開口３０Ｗ及び側面扉４０を有さず、全体が四角形の平板構造をなしている。また、第１側壁３０Ｂの下面には、後述する第２側壁７０のヒンジアーム７１（図８参照）の幅狭部と同様の形状の図示しない複数のヒンジアームが設けられている。そして、後述するヒンジアーム７１とアーム受容部１４との係合のように、第１側壁３０Ｂの複数のヒンジアームが下端ベース１１のアーム受容部１８Ａ（図５参照）に係合し、これにより、第１側壁３０Ｂが起立姿勢と折畳姿勢との間で回動するようになっている。また、第１側壁３０Ｂの両側縁部には、上端部と下端部とに前記した第１側壁連結突部３１（図１１参照）が形成されている。そして、第１側壁３０Ｂを起立姿勢にすると、第１側壁連結突部３１群が後述する第２側壁７０の係合孔７２Ａと門形突片７２Ｋ（図７参照）の内側とに凹凸係合する。さらに、第１側壁３０Ｂの上縁部にも、前記した係合凹部３０Ｋ，３０Ｋが形成されている。 Next, the first side wall 30B will be described. A part of the first side wall 30B is shown in FIG. 2 and does not have the side wall opening 30W and the side door 40, and has a rectangular flat plate structure as a whole. Further, a plurality of hinge arms (not shown) having the same shape as the narrow portion of the hinge arm 71 (see FIG. 8) of the second side wall 70 described later are provided on the lower surface of the first side wall 30B. Then, like the later-described engagement between the hinge arm 71 and the arm receiving portion 14, the plurality of hinge arms on the first side wall 30B engage with the arm receiving portion 18A (see FIG. 5) of the lower end base 11, thereby The first side wall 30B rotates between the standing posture and the folding posture. Moreover, the above-mentioned 1st side wall connection protrusion 31 (refer FIG. 11) is formed in the both-sides edge part of the 1st side wall 30B at the upper end part and the lower end part. Then, when the first side wall 30B is in the upright posture, the first side wall connecting protrusion 31 group engages with the engagement hole 72A of the second side wall 70 described later and the inner side of the portal protrusion 72K (see FIG. 7). To do. Further, the engaging recesses 30K and 30K described above are also formed in the upper edge portion of the first side wall 30B.

次に、第２側壁７０について説明する。図８に示すように、第２側壁７０は、全体が横長の略長方形をなし、その長方形の大部分を占める平板状の主板部７０Ｈに、その主板部７０Ｈの一部を外側に膨出させてなる角溝形補強部７７と主板部７０Ｈの外面から突出した側壁外面リブ７９とを備えて補強した構造になっている。また、第２側壁７０の下縁部には、前記した側壁支持突壁１２の上面突部１２Ａ，第１上面凹部１２Ｂ，第２上面凹部１２Ｃとは凹凸が逆になるように下面凹部７０Ａ，第１下面突部７０Ｂ，第２下面突部７０Ｃが形成され、さらには、第２側壁７０の下端部から、前記したアーム受容部１４（図５参照）に対応した複数のヒンジアーム７１が鉛直下方に真っ直ぐ延びている。 Next, the second side wall 70 will be described. As shown in FIG. 8, the second side wall 70 is formed in a substantially rectangular shape that is horizontally long, and a part of the main plate portion 70 H bulges outward from a flat main plate portion 70 H that occupies most of the rectangle. And a side wall outer rib 79 projecting from the outer surface of the main plate portion 70H. Further, at the lower edge portion of the second side wall 70, the lower surface concave portion 70A, the concave and convex portions are opposite to the upper surface protrusion 12A, the first upper surface concave portion 12B, and the second upper surface concave portion 12C of the side wall support protruding wall 12 described above. A first lower surface protrusion 70B and a second lower surface protrusion 70C are formed, and a plurality of hinge arms 71 corresponding to the arm receiving portion 14 (see FIG. 5) are vertically provided from the lower end portion of the second side wall 70. It extends straight down.

詳細には、角溝形補強部７７は、図７に示すように、第２側壁７０の内面側から見ると角溝状になっていて、第２側壁７０のうち各下面凹部７０Ａと第１下面突部７０Ｂ及び第２下面突部７０Ｃとの各境界部分から第２側壁７０の上端部に亘って延びた複数の縦長角溝形補強部７７Ａと、左右方向の両端の１対の縦長角溝形補強部７７Ａ，７７Ａの間において第２側壁７０の下縁部と上端寄り位置とで、横方向に延びた１対の横長角溝形補強部７７Ｂ，７７Ｂとからなる。なお、第２側壁７０の下縁部に沿って延びた横長角溝形補強部７７Ｂの上面は一直線状に延びているが、下面は下面凹部７０Ａ，７０Ａを備えた部分だけ上方に凹んでいる。また、第２側壁７０の内面のうち各角溝形補強部７７の内部には、それらの長手方向に沿った複数位置に、第２側壁７０を横切る複数の溝内補強リブ７７Ｃが備えられている。 Specifically, as shown in FIG. 7, the rectangular groove-shaped reinforcing portion 77 has a rectangular groove shape when viewed from the inner surface side of the second side wall 70. A plurality of vertically elongated groove-shaped reinforcing portions 77A extending from the respective boundary portions of the lower surface protrusion 70B and the second lower surface protrusion 70C to the upper end portion of the second side wall 70, and a pair of vertically long angles at both ends in the left-right direction Between the groove-shaped reinforcing portions 77A and 77A, a pair of laterally long rectangular groove-shaped reinforcing portions 77B and 77B extending in the lateral direction are formed at the lower edge portion and the upper end position of the second side wall 70. In addition, although the upper surface of the horizontally long rectangular groove-shaped reinforcing portion 77B extending along the lower edge portion of the second side wall 70 extends in a straight line, the lower surface is recessed upward only in a portion provided with the lower surface recesses 70A and 70A. . In addition, a plurality of in-groove reinforcing ribs 77 C crossing the second side wall 70 are provided in a plurality of positions along the longitudinal direction inside each square groove-shaped reinforcing portion 77 in the inner surface of the second side wall 70. Yes.

図８に示すように、側壁外面リブ７９は、第２側壁７０の上縁部と両側縁部とに沿って形成されると共に、第２側壁７０のうち各第２下面突部７０Ｃの上方領域を含む複数箇所に点在している。 As shown in FIG. 8, the side wall outer rib 79 is formed along the upper edge and both side edges of the second side wall 70, and the upper region of each second lower surface protrusion 70 C of the second side wall 70. It is scattered in several places including.

第２側壁７０の左右方向の一端側の第２下面突部７０Ｃには、補助回動規制突部７６が設けられている。補助回動規制突部７６は、主板部７０Ｈの一部を下方に延長した台形状の突片の外面縁部にリブを突出形成してなる。また、補助回動規制突部７６は、側壁外面リブ７９のうち第２下面突部７０Ｃの長手方向の中央に配置された縦リブ７９Ｍと縦長角溝形補強部７７Ａとの間に配置されると共に、第２側壁７０の下面の幅方向においては、第２側壁７０の内面側の縁部から第２側壁７０の板厚方向の中間位置に亘る範囲に配置されている。なお、第２側壁７０の他端側の第２下面突部７０Ｃの下面は、補助回動規制突部７６を有さず、平坦になっている。また、第１下面突部７０Ｂの下面における横方向の両端部には、１対のガイド突部７５，７５が設けられ、後述するように第２側壁７０を下端ベース１１に連結した状態で第２側壁７０を回動するときにガイド突部７５，７５が下端ベース１１のガイド凹部１７，１７の内面に摺接するようになっている。 An auxiliary rotation restricting protrusion 76 is provided on the second lower surface protrusion 70 C on one end side in the left-right direction of the second side wall 70. The auxiliary rotation restricting protrusion 76 is formed by protruding a rib on the outer surface edge of a trapezoidal protruding piece obtained by extending a part of the main plate portion 70H downward. Further, the auxiliary rotation restricting protrusion 76 is disposed between the longitudinal rib 79M disposed at the center in the longitudinal direction of the second lower surface protrusion 70C of the side wall outer surface rib 79 and the longitudinally elongated groove-shaped reinforcing portion 77A. At the same time, in the width direction of the lower surface of the second side wall 70, the second side wall 70 is disposed in a range from the edge on the inner surface side to the intermediate position of the second side wall 70 in the plate thickness direction. Note that the lower surface of the second lower surface protrusion 70C on the other end side of the second side wall 70 does not have the auxiliary rotation restricting protrusion 76 and is flat. In addition, a pair of guide protrusions 75 and 75 are provided at both lateral ends of the lower surface of the first lower surface protrusion 70B, and the second side wall 70 is connected to the lower end base 11 as will be described later. When the two side walls 70 are rotated, the guide protrusions 75 and 75 are in sliding contact with the inner surfaces of the guide recesses 17 and 17 of the lower end base 11.

図７に示すように、第２側壁７０のうち横方向の両側縁からは内側に回動規制突片７２，７２が張り出している。各回動規制突片７２には、四角形の係合孔７２Ａ，７２Ａが貫通形成され、回動規制突片７２の内面における係合孔７２Ａの開口縁からは枠形補強突部７２Ｂが突出している。また、第２側壁７０のうち補助回動規制突部７６側の側縁の回動規制突片７２は、第２側壁７０の上端部から上下方向の中央位置まで延びているのに対し、その反対側の側縁の回動規制突片７２は、短くなっていて第２側壁７０の上端部から上下方向の略１／３の位置まで延び、係合孔７２Ａの数も１つ少ない。また、第２側壁７０のうち補助回動規制突部７６側の側縁と反対側の側縁の下端寄り位置からは、枠形補強突部７２Ｂと同じ構造の門形突片７２Ｋが内側に張り出している。 As shown in FIG. 7, rotation restricting protrusions 72, 72 project inward from both lateral edges of the second side wall 70. Each rotation restricting protrusion 72 has quadrilateral engagement holes 72A, 72A formed therethrough, and a frame-shaped reinforcing protrusion 72B protrudes from the opening edge of the engagement hole 72A on the inner surface of the rotation restricting protrusion 72. . In addition, the rotation restricting protrusion 72 on the side edge on the auxiliary rotation restricting protrusion 76 side of the second side wall 70 extends from the upper end of the second side wall 70 to the center position in the vertical direction. The rotation regulating protrusion 72 on the opposite side edge is shortened and extends from the upper end portion of the second side wall 70 to a position of approximately 1/3 in the vertical direction, and the number of engagement holes 72A is also one less. Further, from the position near the lower end of the side edge of the second side wall 70 opposite to the side edge on the auxiliary rotation restricting protrusion 76 side, the gate-shaped protrusion 72K having the same structure as the frame-shaped reinforcing protrusion 72B is inward. It is overhanging.

第２側壁７０の長手方向の両端寄り位置には、前記した上縁側の横長角溝形補強部７７Ｂの延長線上に弾性係合片７３，７３が設けられている。弾性係合片７３は、第２側壁７０の主板部７０Ｈに「コ」字状のスリットを形成して、第２側壁７０の一部を水平方向に延びた片持ち梁状に切り離してなる。また、弾性係合片７３の先端部分からは、折畳コンテナ１０の内側に向けて係合突部７３Ｔが突出している。係合突部７３Ｔは、回動規制突片７２に向かうに従って徐々に第２側壁７０の内面から迫り出し、回動規制突片７２と対向する平坦面を備えた三角形になっている。そして、係合突部７３Ｔが第１側壁３０，３０Ｂの内面側縁部に係止することで、第１側壁３０，３０Ｂが起立状態に保持される。 At positions closer to both ends in the longitudinal direction of the second side wall 70, elastic engagement pieces 73, 73 are provided on an extension line of the above-described laterally elongated groove-shaped reinforcing portion 77B on the upper edge side. The elastic engagement piece 73 is formed by forming a “U” -shaped slit in the main plate portion 70H of the second side wall 70 and separating a part of the second side wall 70 into a cantilever shape extending in the horizontal direction. Further, an engaging protrusion 73T protrudes from the tip of the elastic engaging piece 73 toward the inside of the folding container 10. The engaging protrusion 73 T gradually protrudes from the inner surface of the second side wall 70 toward the rotation restricting protrusion 72 and has a triangular shape with a flat surface facing the rotation restricting protrusion 72. And the 1st side walls 30 and 30B are hold | maintained in an upright state because the engaging protrusion 73T latches to the inner surface side edge part of the 1st side walls 30 and 30B.

第２側壁７０の上端部には、その長手方向における両端部寄り位置（より具体的には、１対の下面凹部７０Ａ，７０Ａの上方位置）には、例えば４つずつの蓋支持部７４が突出形成されている。そして、各蓋支持部７４群のうち中央で隣り合った１対の蓋支持部７４，７４同士の対向面にヒンジ軸７４Ｊが形成されている。また、各蓋支持部７４には、第２側壁７０の内面側に開放した係合溝７４Ｍが形成されて、それら係合溝７４Ｍの端部が、各蓋支持部７４群のうち両端部で隣り合った蓋支持部７４，７４の互いの対向面にも開放している。 At the upper end of the second side wall 70, for example, four lid support portions 74 are provided at positions closer to both ends in the longitudinal direction (more specifically, above the pair of lower surface recesses 70A and 70A). Protrusions are formed. A hinge shaft 74J is formed on the opposing surface of a pair of lid support portions 74, 74 adjacent to each other in the center of each lid support portion 74 group. Each lid support portion 74 is formed with an engagement groove 74M that is open on the inner surface side of the second side wall 70, and the end portions of these engagement grooves 74M are at both ends of each lid support portion 74 group. The adjacent lid support portions 74, 74 are also open to the opposing surfaces.

図７に示すように、第２側壁７０の上面は、蓋支持部７４が形成されている部分を除く全体が、外面側より内面側が陥没した段付き構造になっていて、第２側壁７０の上面のうち外面側が上段上面７８Ｂをなす一方、内面側が下段上面７８Ａになっていて、その上段上面７８Ｂより下段上面７８Ａ側が本発明に係る陥没部７８Ｃになっている。 As shown in FIG. 7, the entire upper surface of the second side wall 70 except for the portion where the lid support portion 74 is formed has a stepped structure in which the inner surface side is depressed from the outer surface side. The outer surface of the upper surface forms the upper upper surface 78B, while the inner surface is the lower upper surface 78A, and the lower upper surface 78A side of the upper upper surface 78B is the depressed portion 78C according to the present invention.

図８に示すように、各ヒンジアーム７１は、前記したアーム受容部１４の形状に対応して上端寄り位置より下側が段付き状に幅が狭くなっている。そのヒンジアーム７１の幅狭部７１Ａは、アーム受容部１４の受容本体部１４Ｓと略同じ幅をなしている。また、ヒンジアーム７１は、主板部７０Ｈと面一のアーム板部７１Ｈの外面に複数のアームリブ７１Ｌを突出形成してなり、一部のアームリブ７１Ｌは、幅狭部７１Ａにおけるアーム板部７１Ｈの両側縁部とそれら両側縁部の間の中央部とに沿って上下方向に延びて第２側壁７０の下面に繋がっている。さらに、幅狭部７１Ａの下端部における両側面から、回動中心突起７１Ｔ，７１Ｔが両側方に突出している。また、第１下面突部７０Ｂに配置されたヒンジアーム７１においては、ヒンジアーム７１の幅広部７１Ｂにおけるアーム板部７１Ｈの外縁部全体からアームリブ７１Ｌが突出している。一方、下面凹部７０Ａに配置されたヒンジアーム７１においては、ヒンジアーム７１の幅広部７１Ｂにおけるアーム板部７１Ｈの下側略半分の外縁部からアームリブ７１Ｌが突出すると共に、幅広部７１Ｂの上下方向の中間位置に横に延びたアームリブ７１Ｌが備えられて、それらヒンジアーム７１から角筒状の１対の起立係合凸部７１Ｍ，７１Ｍが構成されている。 As shown in FIG. 8, each hinge arm 71 has a stepped shape on the lower side from the position near the upper end corresponding to the shape of the arm receiving portion 14 described above, and the width is narrowed. The narrow portion 71 A of the hinge arm 71 has substantially the same width as the receiving main body portion 14 S of the arm receiving portion 14. Further, the hinge arm 71 is formed by projecting a plurality of arm ribs 71L on the outer surface of the arm plate portion 71H flush with the main plate portion 70H, and some of the arm ribs 71L are on both sides of the arm plate portion 71H in the narrow portion 71A. It extends in the vertical direction along the edge portion and the central portion between both side edge portions, and is connected to the lower surface of the second side wall 70. Furthermore, the rotation center protrusions 71T and 71T protrude from both side surfaces at the lower end of the narrow portion 71A. In the hinge arm 71 disposed on the first lower surface protrusion 70B, the arm rib 71L protrudes from the entire outer edge portion of the arm plate portion 71H in the wide portion 71B of the hinge arm 71. On the other hand, in the hinge arm 71 disposed in the lower surface recess 70A, the arm rib 71L protrudes from the outer half of the lower half of the arm plate portion 71H of the wide portion 71B of the hinge arm 71, and the vertical direction of the wide portion 71B. Arm ribs 71L extending laterally are provided at intermediate positions, and a pair of upright engaging projections 71M and 71M in the form of a rectangular tube are formed from these hinge arms 71.

そして、各ヒンジアーム７１における回動中心突起７１Ｔ，７１Ｔが、下端ベース１１の各アーム受容部１４における抜け止め突起１４Ｔ，１４Ｔ（図６参照）の下方に上下動可能に収容されて回動中心突起７１Ｔ，７１Ｔを中心に第２側壁７０が回動し、第２側壁７０が起立姿勢になると、図１に示すように、側壁支持突壁１２の１対の上面突部１２Ａ，１２Ａが第２側壁７０の１対の下面凹部７０Ａ，７０Ａ内に収まり、第２側壁７０の１対の第２下面突部７０Ｃ，７０Ｃが側壁支持突壁１２の１対の第２上面凹部１２Ｃ，１２Ｃ内に収まり、さらに、第２側壁７０の第１下面突部７０Ｂが側壁支持突壁１２の第１上面凹部１２Ｂ内に収まる。この状態で、図示しないがヒンジアーム７１の起立係合凸部７１Ｍ群がアーム受容部１４におけるＬ形係止部１４Ｆ群の下面に係合して、第２側壁７０の上下動が規制される。また、図１６に示すように、第２側壁７０の補助回動規制突部７６が側壁支持突壁１２の係合凹部１６に凹凸係合する。さらに、第２側壁７０の左右方向における両側縁部の縦リブ７９Ｍとその隣の縦リブ７９Ｍとその隣の縦長角溝形補強部７７Ａの一側壁とが、それぞれ下端ベース１１の縦リブ１２Ｍと同一直線状に並ぶ。 Then, the rotation center protrusions 71T and 71T in each hinge arm 71 are accommodated below the retaining protrusions 14T and 14T (see FIG. 6) in each arm receiving portion 14 of the lower end base 11 so as to be movable up and down. When the second side wall 70 rotates around the protrusions 71T and 71T and the second side wall 70 is in a standing posture, the pair of upper surface protrusions 12A and 12A of the side wall supporting protrusion wall 12 are The pair of second lower surface protrusions 70C, 70C of the second side wall 70 are accommodated in the pair of second upper surface recesses 12C, 12C of the side wall support protrusion wall 12. Furthermore, the first lower surface projection 70B of the second side wall 70 is accommodated in the first upper surface recess 12B of the side wall support projection wall 12. In this state, although not shown, the upright engagement convex portion 71M group of the hinge arm 71 is engaged with the lower surface of the L-shaped locking portion 14F group in the arm receiving portion 14, and the vertical movement of the second side wall 70 is restricted. . Further, as shown in FIG. 16, the auxiliary rotation restricting protrusion 76 of the second side wall 70 engages with the engaging recess 16 of the side wall supporting protrusion 12 in an uneven manner. Further, the vertical rib 79M on both side edges in the left-right direction of the second side wall 70, the adjacent vertical rib 79M, and one side wall of the adjacent vertical elongated groove-shaped reinforcing portion 77A are respectively connected to the vertical rib 12M of the lower end base 11 respectively. Line up in a straight line.

次に、１対の上面蓋８０，８０について説明する。以下、特記しない限り、上面蓋８０の上下方向、上面、下面等は、上面蓋８０を閉じた状態にした場合における上面蓋８０の上下方向、上端部、下端部等を指すものとする。図９に示すように、各上面蓋８０は、全体が略長方形の主体板８０Ｈを備えて、その主体板８０Ｈを下面リブ８０Ｌ（図１０参照）等で補強すると共に、主体板８０Ｈの外縁部の一方の長辺から複数の扉先端突部８３を突出させた構造になっている。また、主体板８０Ｈの他方の長辺の両端寄り位置には、３つずつのヒンジ係合突部８１群が設けられている。ヒンジ係合突部８１群は、共に上面蓋８０の上面より上方に向かって突出している。また、各ヒンジ係合突部８１群のうち中央のヒンジ係合突部８１には、上方に開放した係合溝８１Ｍが形成され、残り２つのヒンジ係合突部８１，８１の両側面には、ヒンジ軸８１Ｊが形成されている。また、図１に示すように、第２側壁７０の各蓋支持部７４群のうち隣り合った蓋支持部７４，７４の間に各ヒンジ係合突部８１が配置されて、係合溝８１Ｍとヒンジ軸７４Ｊ（図７参照）、及び、ヒンジ軸８１Ｊと係合溝７４Ｍ（図７参照）が回動可能に係合し、これらヒンジ係合突部８１と蓋支持部７４とによって本発明に係るヒンジ部１０Ｈが構成されている。また、上記構成により本実施形態の折畳コンテナ１０では、ヒンジ部１０Ｈが、各第２側壁７０の横方向の中央部を除いた位置（両端寄りの２位置）に配置された構造になっている。そして、上面蓋８０は、第２側壁７０の上端部から内側に水平に張り出した閉止状態から第２側壁７０の外面に重ねられた全開状態とに変更することができる。 Next, the pair of upper surface lids 80 and 80 will be described. Hereinafter, unless otherwise specified, the vertical direction, the upper surface, the lower surface, and the like of the upper surface lid 80 indicate the vertical direction, the upper end, the lower end, and the like of the upper surface lid 80 when the upper surface lid 80 is closed. As shown in FIG. 9, each upper surface lid 80 includes a substantially rectangular main plate 80H, and the main plate 80H is reinforced by a lower surface rib 80L (see FIG. 10) and the outer edge portion of the main plate 80H. A plurality of door tip protrusions 83 are protruded from one of the long sides. Further, three groups of hinge engaging protrusions 81 are provided at positions near both ends of the other long side of the main plate 80H. Both of the hinge engaging protrusions 81 protrude upward from the upper surface of the upper cover 80. In addition, an engaging groove 81M opened upward is formed in the central hinge engaging protrusion 81 of each hinge engaging protrusion 81 group, and the remaining two hinge engaging protrusions 81, 81 are formed on both side surfaces. The hinge shaft 81J is formed. Further, as shown in FIG. 1, the hinge engaging protrusions 81 are disposed between the adjacent lid support portions 74, 74 of the respective lid support portion 74 groups of the second side wall 70, and the engagement grooves 81 M are arranged. And the hinge shaft 74J (see FIG. 7), and the hinge shaft 81J and the engagement groove 74M (see FIG. 7) are rotatably engaged, and the hinge engagement protrusion 81 and the lid support portion 74 are used in the present invention. The hinge part 10H which concerns on is comprised. Moreover, in the folding container 10 of this embodiment by the said structure, it becomes a structure where the hinge part 10H is arrange | positioned in the position (2 positions near both ends) except the center part of the horizontal direction of each 2nd side wall 70. Yes. Then, the upper surface lid 80 can be changed from a closed state in which it projects horizontally inward from the upper end portion of the second side wall 70 to a fully open state in which it is overlapped on the outer surface of the second side wall 70.

上面蓋８０のうち回動中心から離れた先端部には、前述した複数の扉先端突部８３が備えられると共に、それら各扉先端突部８３の隣が扉先端凹部８４になっている。また、各扉先端凹部８４における奥行き方向の中間部より奥側には裏側支持壁８５が設けられ、それら各裏側支持壁８５は、上面蓋８０全体の上面より陥没した位置に配置されている。そして、図１に示すように、１対の上面蓋８０，８０を閉じると、一方の上面蓋８０の扉先端凹部８４に他方の上面蓋８０の扉先端突部８３が収まりかつ、一方の上面蓋８０の裏側支持壁８５の上に他方の上面蓋８０の扉先端突部８３が重なる。 The front end portion of the top cover 80 away from the rotation center is provided with the plurality of door front end protrusions 83 described above, and the door front end recesses 83 are adjacent to the door front end protrusions 83. In addition, back side support walls 85 are provided behind the middle portion in the depth direction of each door front end recess 84, and each back side support wall 85 is disposed at a position recessed from the top surface of the entire top cover 80. Then, as shown in FIG. 1, when the pair of upper surface lids 80, 80 are closed, the door front end protrusion 83 of the other upper surface lid 80 is accommodated in the door front end recessed portion 84 of one upper surface lid 80, and On the back side support wall 85 of the lid 80, the door tip protrusion 83 of the other upper surface lid 80 overlaps.

図１０に示すように、下面リブ８０Ｌは、上面蓋８０の長手方向の両端部の外縁部及びヒンジ係合突部８１群を備えた側の外縁部より内側に位置した部分から突出していて、上面蓋８０を閉じると、図１５に示すように、下面リブ８０Ｌが折畳コンテナ１０の上面開口の内側に嵌合される。また、上面蓋８０の長手方向の両端部の外縁部と、ヒンジ係合突部８１群を備えた側の外縁部と、各扉先端突部８３の外縁部とに沿って下面リブ８０Ｌより低い下面突条８０Ｔが形成されている。さらに、上面蓋８０の長手方向の両端部の外縁部からは、それぞれ下方に向かって側壁係止突部８９が突出している。なお、扉先端突部８３の突出方向の中間位置を横切るように扉先端突部８３の下面突条８０Ｔの２箇所には、切り欠き部８３Ａが形成され、図９に示すように裏側支持壁８５の上面に備えた上面突条８５Ｔが切り欠き部８３Ａに受容されるようになっている。また、図１０に示すように、上面蓋８０のうち下面リブ８０Ｌに囲まれた部分には、上面蓋８０の一部を上面側から陥没させかつ下面側に膨出させて長方形の補強用膨出部８８が形成されている。 As shown in FIG. 10, the lower surface rib 80L protrudes from the outer edge of both ends in the longitudinal direction of the upper surface lid 80 and the portion located on the inner side of the outer edge on the side provided with the hinge engaging protrusion 81 group. When the upper surface lid 80 is closed, the lower surface rib 80L is fitted inside the upper surface opening of the folding container 10 as shown in FIG. Moreover, it is lower than lower surface rib 80L along the outer edge part of the longitudinal direction both ends of the upper surface cover 80, the outer edge part of the side provided with 81 groups of hinge engaging protrusions, and the outer edge part of each door front-end | tip protrusion 83. A lower surface protrusion 80T is formed. Furthermore, side wall locking projections 89 protrude downward from outer edge portions at both ends in the longitudinal direction of the upper surface lid 80. Notch portions 83A are formed at two locations on the lower surface protrusion 80T of the door front end protrusion 83 so as to cross the intermediate position in the protruding direction of the door front end protrusion 83, as shown in FIG. An upper surface protrusion 85T provided on the upper surface of 85 is received in the notch 83A. Further, as shown in FIG. 10, in a portion surrounded by the lower surface rib 80L of the upper surface lid 80, a part of the upper surface lid 80 is depressed from the upper surface side and bulges to the lower surface side to form a rectangular reinforcing bulge. A protruding portion 88 is formed.

図９に示すように、上面蓋８０のうち回動中心側の外縁部のうちヒンジ係合突部８１群同士の間に挟まれた中央部には、主体板８０Ｈを外側に延長して蓋外縁中央突片８６が形成されると共に、上面蓋８０のうち回動中心側の外縁部のうち両ヒンジ係合突部８１群より端部側には、主体板８０Ｈを外側に延長して蓋外縁側部突片８７，８７が形成されている。また、これら蓋外縁中央突片８６及び蓋外縁側部突片８７の先端は、ヒンジ係合突部８１群より内側に引っ込んでいる。そして、図１４に示すように、上面蓋８０を第２側壁７０の外面に重ねた全開状態にすると、蓋外縁中央突片８６及び蓋外縁側部突片８７が第２側壁７０の上段上面７８Ｂより上方に突出する。この全開状態における蓋外縁中央突片８６及び蓋外縁側部突片８７の第２側壁７０の上段上面７８Ｂから上方への突出量は、上段上面７８Ｂからヒンジ部１０Ｈの突出量より小さくなっている。これにより、第２側壁７０を折り畳むと、図１３に示すように、ヒンジ部１０Ｈの各先端と、側壁支持突壁１２の内面との間に指を挿入可能な指挿入空間Ｒが形成される。また、図１５に示すように、上面蓋８０を閉じると、第２側壁７０の下段上面７８Ａ上に蓋外縁中央突片８６及び蓋外縁側部突片８７が重ねられ、蓋外縁中央突片８６及び蓋外縁側部突片８７の上面を含む上面蓋８０全体の上面が上段上面７８Ｂと略面一になる。 As shown in FIG. 9, a main plate 80H is extended to the outside at the center portion sandwiched between the hinge engaging protrusions 81 among the outer edge portions of the upper surface lid 80 on the rotation center side. An outer edge central protrusion piece 86 is formed, and a main plate 80H is extended outward from the upper edge cover 80 on the end side of both hinge engaging protrusions 81 in the outer edge part on the rotation center side. Outer edge side protrusions 87, 87 are formed. Further, the tips of the lid outer edge central protrusion 86 and the lid outer edge side protrusion 87 are retracted inward from the hinge engaging protrusion 81 group. Then, as shown in FIG. 14, when the upper surface lid 80 is fully opened by overlapping the outer surface of the second side wall 70, the lid outer edge central projection 86 and the lid outer edge side projection 87 are the upper upper surface 78B of the second side wall 70. It protrudes further upward. In the fully opened state, the protruding amount of the lid outer edge central protrusion 86 and the cover outer edge side protrusion 87 upward from the upper upper surface 78B of the second side wall 70 is smaller than the protruding amount of the hinge portion 10H from the upper upper surface 78B. . Thus, when the second side wall 70 is folded, a finger insertion space R into which a finger can be inserted is formed between each tip of the hinge portion 10H and the inner surface of the side wall support protruding wall 12, as shown in FIG. . As shown in FIG. 15, when the upper cover 80 is closed, the cover outer edge central protrusion 86 and the cover outer edge side protrusion 87 are superimposed on the lower upper surface 78 A of the second side wall 70, and the cover outer edge central protrusion 86. And the upper surface of the entire upper surface lid 80 including the upper surface of the lid outer edge side protrusion 87 is substantially flush with the upper surface 78B.

本実施形態の折畳コンテナ１０の構成に関する説明は以上である。次に、この折畳コンテナ１０の作用効果について説明する。折畳コンテナ１０を折り畳む場合には、図２に示すように、上面蓋８０，８０を開いて第２側壁７０，７０の外面に重ねた全開状態とし、第１側壁３０，３０Ｂの上端部を折畳コンテナ１０の内側に向けて叩く。すると、その衝撃により係合突部７３Ｔと第１側壁３０との係合が解除され、第１側壁３０，３０Ｂが内側に倒れ、底壁１５の上面１５Ｓに重ねられる。そして、図３に示すように、一方の第２側壁７０を内側に倒して第１側壁３０，３０Ｂの上に重ねてから、他方の第２側壁７０を内側に倒して一方の第２側壁７０の上に重ねて、図４に示すように、折畳コンテナ１０全体を折畳状態にすることができる。 The description regarding the structure of the folding container 10 of this embodiment is above. Next, the effect of this folding container 10 is demonstrated. When the folding container 10 is folded, as shown in FIG. 2, the upper lids 80 and 80 are opened to be fully opened on the outer surfaces of the second side walls 70 and 70, and the upper ends of the first side walls 30 and 30B are Tap toward the inside of the folding container 10. Then, due to the impact, the engagement between the engaging protrusion 73T and the first side wall 30 is released, and the first side walls 30 and 30B are tilted inward and overlapped with the upper surface 15S of the bottom wall 15. As shown in FIG. 3, one second side wall 70 is tilted inward and overlaid on the first side walls 30, 30 B, and then the other second side wall 70 is tilted inward and one second side wall 70. As shown in FIG. 4, the entire folding container 10 can be folded.

折畳コンテナ１０を折畳状態から組縦状態にするには、上記した折り畳み操作と逆の手順で行えばよい。ところが、折畳コンテナ１０が折畳状態になると、図１３に示すように、１対の第２側壁７０，７０が１対の側壁支持突壁１２，１２の間に収まって、側壁支持突壁１２と第２側壁７０のヒンジ部１０Ｈとの間に指を挿入する隙間がなくなる。しかしながら、本実施形態の折畳コンテナ１０では、第２側壁７０と上面蓋８０とを連結するヒンジ部１０Ｈが、第２側壁７０の横方向の中央部を除いた端部寄りの２位置に配置され、上面蓋８０に備えた蓋外縁中央突片８６が、第２側壁７０の横方向の中央部における上面から突出し、さらに、その蓋外縁中央突片８６と側壁支持突壁１２との間には、指を挿入可能な指挿入空間Ｒが形成されるので、蓋外縁中央突片８６に指を掛けて第２側壁７０を引き起こすことができる。また、蓋外縁中央突片８６は、第２側壁７０の横方向の中央に配置されかつ上面蓋８０の回動中心側に形成されているので、上面蓋８０が第２側壁７０に対して大きく回動する従来の問題や、第２側壁７０が横に傾いたり捻れる従来の問題も生じることなく、容易かつスムーズに第２側壁７０を折畳状態から起立状態に変更することができる。即ち、本実施形態によれば、上面蓋８０を備えた折畳コンテナ１０の組立作業が容易になる。しかも、蓋外縁中央突片８６は、折畳コンテナ１０を組立状態にして上面蓋８０を閉じたときには、図１５に示すように、第２側壁７０の上面における内縁側に陥没部７８Ｃに収まりかつ蓋外縁中央突片８６の上面と第２側壁７０の上面とが面一になるので、蓋外縁中央突片８６が異物に引っ掛かったり、折畳コンテナ１０同士の積み上げの妨げになることもない。 In order to change the folding container 10 from the folded state to the assembled vertical state, the procedure may be reversed from the folding operation described above. However, when the folding container 10 is in the folded state, as shown in FIG. 13, the pair of second side walls 70, 70 are accommodated between the pair of side wall support projecting walls 12, 12, and the side wall support projecting walls 12 and the hinge portion 10H of the second side wall 70 are eliminated. However, in the folding container 10 of the present embodiment, the hinge portion 10H that connects the second side wall 70 and the upper surface lid 80 is disposed at two positions near the end of the second side wall 70 except for the central portion in the lateral direction. The lid outer edge central protrusion 86 provided on the upper surface lid 80 protrudes from the upper surface at the lateral center of the second side wall 70, and further between the lid outer edge central protrusion 86 and the side wall support protrusion 12. Since a finger insertion space R into which a finger can be inserted is formed, the second side wall 70 can be caused by hooking the finger on the lid outer edge central protrusion 86. Further, the lid outer edge central protrusion 86 is disposed at the center in the lateral direction of the second side wall 70 and is formed on the rotation center side of the upper surface lid 80, so that the upper surface lid 80 is larger than the second side wall 70. The second side wall 70 can be easily and smoothly changed from the folded state to the standing state without causing the conventional problem of rotating and the conventional problem of the second side wall 70 tilting or twisting sideways. That is, according to this embodiment, the assembly work of the folding container 10 provided with the upper surface lid 80 becomes easy. In addition, when the folding container 10 is assembled and the upper surface lid 80 is closed, the lid outer edge central protrusion 86 fits in the recessed portion 78C on the inner edge side on the upper surface of the second side wall 70, as shown in FIG. Since the upper surface of the lid outer edge central projection piece 86 and the upper surface of the second side wall 70 are flush with each other, the lid outer edge central projection piece 86 is not caught by a foreign object and does not interfere with the stacking of the folding containers 10.

［他の実施形態］
本発明は、前記実施形態に限定されるものではなく、例えば、以下に説明するような実施形態も本発明の技術的範囲に含まれ、さらに、下記以外にも要旨を逸脱しない範囲内で種々変更して実施することができる。 [Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

（１）前記実施形態では、折畳状態で一方の第２側壁７０の上に他方の第２側壁７０が重ねられる折畳コンテナ１０に本発明を適用した例を示したが、折畳状態で、１対の第２側壁が、それらの先端同士を突き合わせた状態になる折畳コンテナの上面蓋に、上記した蓋外縁中央突片を設けてもよい。 (1) In the said embodiment, although the example which applied this invention to the folding container 10 with which the other 2nd side wall 70 is piled up on one 2nd side wall 70 in the folded state was shown, The above-mentioned lid outer edge central protrusion may be provided on the upper surface lid of the folding container in which the pair of second side walls are in a state in which their tips are butted against each other.

（２）前記実施形態では、上面蓋８０を閉じたときに蓋外縁中央突片８６が第２側壁７０に形成された陥没部７８Ｃに収まる構成であったが、陥没部７８Ｃを設けず、上面蓋８０を閉じたときに蓋外縁中央突片８６が第２側壁７０の内側に収まる構成にしてもよい。 (2) In the above-described embodiment, the lid outer edge central protrusion 86 fits into the recessed portion 78C formed on the second side wall 70 when the upper surface lid 80 is closed, but the upper surface is not provided with the recessed portion 78C. A configuration may be adopted in which the lid outer edge central protruding piece 86 fits inside the second side wall 70 when the lid 80 is closed.

１０折畳コンテナ
１０Ｈヒンジ部
１２側壁支持突壁
１５底壁
３０，３０Ｂ第１側壁
７０第２側壁
７８Ｃ陥没部
８０上面蓋
８６蓋外縁中央突片
Ｒ指挿入空間 DESCRIPTION OF SYMBOLS 10 Folding container 10H Hinge part 12 Side wall support protrusion wall 15 Bottom wall 30, 30B 1st side wall 70 2nd side wall 78C Depression part 80 Upper surface cover 86 Lid outer edge center protrusion R Finger insertion space

Claims

平面形状が四角形の底壁における１対の対向辺に配置された１対の第１側壁と、残り１対の対向辺に配置された１対の第２側壁とが下端部を中心に回動し、前記第１、第２の側壁の順に前記底壁の上に重ねられて折畳状態になる折畳コンテナであって、
その上面開口を閉塞するための１対の上面蓋が前記１対の第２側壁の上面から突出したヒンジ部により前記１対の第２側壁に回動可能に連結され、各前記上面蓋が前記第２側壁の外側面に重ねられた全開状態で前記第２側壁が折り畳まれる折畳コンテナにおいて、
前記ヒンジ部を前記第２側壁の横方向の中央部を除いた位置に配置して、前記上面蓋に、前記全開状態で前記第２側壁の横方向の中央部における上面から突出する蓋外縁中央突片を設けたことを特徴とする折畳コンテナ。 A pair of first side walls arranged on a pair of opposite sides of a bottom wall having a quadrangular shape and a pair of second side walls arranged on the other pair of opposite sides rotate around a lower end portion. And a folding container that is folded on the bottom wall in the order of the first and second side walls,
A pair of upper surface lids for closing the upper surface opening are pivotally connected to the pair of second side walls by hinge portions protruding from the upper surfaces of the pair of second side walls, and each of the upper surface lids is In the folding container in which the second side wall is folded in a fully opened state superimposed on the outer surface of the second side wall,
The hinge portion is disposed at a position excluding the lateral center portion of the second side wall, and the lid outer edge center projecting from the upper surface in the lateral center portion of the second side wall in the fully opened state on the upper surface lid. Folding container characterized by providing a projecting piece.

前記蓋外縁中央突片は、前記上面蓋を閉じたときに前記第２側壁の内側又は、前記第２側壁の上面の内縁側に段付き状に陥没形成された陥没部に収まりかつ前記蓋外縁中央突片の上面と前記第２側壁の上面とが面一になることを特徴とする請求項１に記載の折畳コンテナ。 The lid outer edge central protrusion fits in a stepped recess formed inside the second side wall or on the inner edge side of the upper surface of the second side wall when the upper surface lid is closed, and the lid outer edge. The folding container according to claim 1, wherein an upper surface of the central projecting piece and an upper surface of the second side wall are flush with each other.

前記１対の第２側壁は、前記底壁の外縁部から起立した１対の側壁支持突壁の上で起立状態になると共に、前記折畳状態にしたときに前記１対の側壁支持突壁の間で、一方の前記第２側壁の上に他方の前記第２側壁が重ねられるように構成され、
前記上面蓋の前記全開状態で、前記蓋外縁中央突片が前記第２側壁の上面から突出する量を、前記ヒンジ部が前記第２側壁の上面から突出する量より小さくして、前記折畳状態にしたときに前記蓋外縁中央突片と前記側壁支持突壁との間に、指を挿入可能な指挿入空間が形成されるようにしたことを特徴とする請求項１又は２に記載の折畳コンテナ。 The pair of second side walls are in a standing state on the pair of side wall supporting protrusions that are erected from the outer edge of the bottom wall, and the pair of side wall supporting protrusions are in the folded state. Between the second side wall and the other second side wall.
In the fully opened state of the upper surface lid, the amount of protrusion of the lid outer edge central protrusion from the upper surface of the second side wall is made smaller than the amount of protrusion of the hinge portion from the upper surface of the second side wall. The finger insertion space into which a finger can be inserted is formed between the lid outer edge center protrusion and the side wall support protrusion when the state is set. Folding container.

前記折畳状態にしたときに、前記１対の第２側壁が、それらの先端同士を突き合わせた状態になるように構成され、
前記上面蓋の前記全開状態で、前記蓋外縁中央突片が前記第２側壁の上面から突出する量を、前記ヒンジ部が前記第２側壁の上面から突出する量より小さくして、前記折畳状態にしたときに両前記第２側壁の前記蓋外縁中央突片同士の間に、指を挿入可能な指挿入空間が形成されるようにしたことを特徴とする請求項１又は２に記載の折畳コンテナ。 When the folded state, the pair of second side walls are configured to be in a state in which their tips are butted together,
In the fully opened state of the upper surface lid, the amount of protrusion of the lid outer edge central protrusion from the upper surface of the second side wall is made smaller than the amount of protrusion of the hinge portion from the upper surface of the second side wall. The finger insertion space into which a finger can be inserted is formed between the lid outer edge central protrusions of both the second side walls when in the state. Folding container.