Container

Abstract

To provide a container that improves cold and heat retention while protecting a connection mechanism and stabilizing a connection state.SOLUTION: A container body 2 includes: a bottom wall constitution part 4 including a bottom wall part 5 having a substantially rectangular shape in a plan view and base parts 6 and 7 projecting upward along a side part of the bottom wall part 5; and side wall parts 8 and 9 connected to the base parts 6 and 7 of the bottom wall constitution part 4 so as to be rotatably displaceable. The side wall parts 8 and 9 and the bottom wall constitution part 4 have internal spaces 12, 32 and 62, respectively, and heat insulating members 10 are provided in the internal spaces 12, 32 and 62. The short side wall part 8 and the short side base part 6 are provided with a side wall side engaging part 104 and a base side engaging part 103 that can be irregularity-engaged with each other in a horizontal direction when the container body 2 is in an assembled state. When the container body 2 is assembled, the side wall side engaging part 104 and the base side engaging part 103 are configured such that the side wall side engaging part 104 and the base side engaging part 103 sandwich between the heat insulating members 10 in a horizontal direction and a vertical direction.SELECTED DRAWING: Figure 19

Description

Technical Field

[0001] The present invention relates to a container used for transporting articles and the like.

Background Art

[0002] Conventionally, as a container used for transporting articles and the like, a bottom wall structure portion having a substantially rectangular bottom wall portion and pedestal portions protruding upward along each side portion of the bottom wall portion, and side wall portions rotatably connected to each pedestal portion are provided, and a box-shaped container that can be assembled and can be folded by tilting each side wall portion above the bottom wall portion is known. Further, there is a technique of making each side wall portion and the bottom wall structure portion into a hollow structure and providing a heat insulating member in its internal space to enhance cold storage and heat preservation properties (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, the container may be in a folded state and covered with a lid.

[0005] An object of the present invention is to provide a container capable of stabilizing the state in which a lid is placed on a container body in a folded state.

Means for Solving the Problems

[0006] Hereinafter, each means suitable for solving the above object and the like will be described item by item. In addition, the effects and the like peculiar to the corresponding means will be appended as necessary.

[0007] Means 1. A bottom wall component including a bottom wall portion having a substantially rectangular shape in plan view and a base portion protruding upward along a side portion of the bottom wall portion, A side wall portion rotatably connected between an upright posture erected above each side portion of the bottom wall portion and a folded posture folded toward the central portion side of the bottom wall portion with respect to the base portion of the bottom wall component, A container body capable of changing its state between an assembled state in which all the side wall portions are in the upright posture and a folded state in which all the side wall portions are in the folded posture, A lid capable of closing an upper surface opening of the container body in the assembled state, Comprising, In the container configured such that the lid can be placed on the upper surface of the base portion of the container body in the folded state, The connecting mechanism that rotatably connects the side wall portion to the bottom wall component includes a side wall side shaft portion provided on a side portion of the side wall portion and a base side shaft portion provided on the base portion, The base portion, A base lower vertical wall portion extending upward from the bottom wall portion, A base middle wall portion extending outward from the upper edge portion of the base lower vertical wall portion to the outside of the container body, A base upper vertical wall portion extending upward from an edge portion on the outside of the container body of the base middle wall portion, Base shaft wall portions extending upward from both side edge portions of the base middle wall portion, respectively, The base side shaft portion is provided at a lower portion of the base shaft wall portion, An axis guide groove portion extending in a substantially vertical direction from above the base side shaft portion to the upper edge portion of the base shaft wall portion is provided on the base shaft wall portion, A container characterized in that in a state where the lid is placed on the upper surface of the base portion of the container body in the folded state, a part of the lid is configured to face the base shaft wall portion in a horizontal direction.

[0008] According to Means 1, it is possible to achieve stabilization of the state in which the lid covers the container body in the folded state.

[0009] Means 2. On the outer surface side of the side wall portion, an upper side wall portion, an extending wall portion extending inward from the lower side edge of the upper side wall portion into the container body, and a lower side wall portion extending downward from the leading edge of the extending wall portion are provided. The container according to Means 1, wherein in the assembled state of the container body, the lower side wall portion and the vertical wall portion on the base are configured to face each other in the horizontal direction.

[0010] Means 3. The base portion includes the vertical wall portion on the base and an upper stage wall portion on the base extending outward from the upper edge of the axial wall portion on the base to the outside of the container body. The container according to Means 1 or 2, wherein in the container body in the folded state, the upper surface of the upper stage wall portion on the base is located above the upper end portions of all the side wall portions in the folded posture.

[0011] Means 4. An axial wall surface adjustment portion extending from the inner edge of the container body of the axial wall portion on the base to the outside of the container body is provided, and a locking wall support wall portion protruding from the axial wall surface adjustment portion to the side separated from the vertical wall portion on the base is provided. The container according to any one of Means 1 to 3.

[0012] The container according to Means 4, wherein the portion corresponding to the locking wall support wall portion is configured to be thinner than the portion corresponding to the axial wall portion on the base.

Brief Description of the Drawings

[0013]

Figure 1

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Mode for Carrying Out the Invention

[0014] Hereinafter, an embodiment will be described with reference to the drawings. As shown in FIGS. 1, 2, etc., the container 1 includes a rectangular box-shaped container body 2 that opens upward, and a lid 3 that is detachably placed on the container body 2. As shown in FIGS. 3, 7, 16, etc., the container body 2 includes a bottom wall portion 5 having a substantially rectangular shape in plan view, short-side base portions 6 that project upward from the bottom wall portion 5 along each short side portion of the bottom wall portion 5, and long-side base portions 7 that project upward from the bottom wall portion 5 along each long side portion of the bottom wall portion 5, and includes a bottom wall component portion 4. Further, as shown in FIGS. 2, 3, etc., the container body 2 includes short-side side wall portions 8 and long-side side wall portions 9 that can be rotationally displaced between a standing posture erected above each short-side base portion 6 and each long-side base portion 7, and a folded posture in which they are laid down on the central portion side of the bottom wall portion 5. Therefore, when storing articles in the container 1, it is in an assembled state (see FIG. 2) in which all the short-side side wall portions 8 and the long-side side wall portions 9 are in the standing posture, and when storing the container 1, etc., it is in a folded state (see FIGS. 3 and 4) in which all the short-side side wall portions 8 and the long-side side wall portions 9 are in the folded posture, and it is configured to be able to save space, etc.

[0015] Also, as shown in FIGS. 7 and 16, the protruding length of the short-side base portion 6 from the bottom wall portion 5 is longer than the protruding length of the long-side base portion 7 from the bottom wall portion 5. As shown in FIG. 16, the formation position of the short-side bearing portion 74 for rotatably supporting the short-side side wall portion 8 is also located above the formation position of the long-side bearing portion 83 for rotatably supporting the long-side side wall portion 9. Further, as shown in FIGS. 2 and 7, etc., the lateral width of the short-side side wall portion 8 is configured to be substantially the same as the short-side width of the bottom wall component portion 4, and the lateral width of the long-side side wall portion 9 is configured to be substantially the same as the distance between the pair of short-side base portions 6. For this reason, in the present embodiment, when the container body 2 in the assembled state where all the short-side side wall portions 8 and the long-side side wall portions 9 are in the standing posture is changed to the folded state where all the short-side side wall portions 8 and the long-side side wall portions 9 are in the folded posture, the pair of long-side side wall portions 9 are first displaced to the folded posture so as to overlap above the bottom wall portion 5, and then the short-side side wall portions 8 are displaced to the folded posture so as to overlap above the long-side side wall portions 9. On the other hand, when changing the container body 2 in the folded state to the assembled state, first, the short-side side wall portion 8 as the first-standing side wall portion is set to the standing posture, and then the long-side side wall portion 9 is set to the standing posture.

[0016] As shown in FIGS. 7, 8, 10, etc., each short-side side wall portion 8 includes a short-side base component portion 11 that constitutes most of the outer portion of the short-side side wall portion 8, and a short-side inner surface component portion 13 for forming a short-side inner space 12 (see FIGS. 19 and 20) between the short-side base component portion 11 and the inner surface of the short-side base component portion 11. In the present embodiment, the short-side base component portion 11 and the short-side inner surface component portion 13 are made of a polyolefin resin (in this embodiment, polypropylene).

[0017] As shown in FIGS. 8, 9, etc., the short-side base component 11 includes an upper wall portion 16 having a substantially rectangular shape in a front view, an extending wall portion 17 extending inward from the lower side portion of the upper wall portion 16 into the container body 2, and a lower wall portion 18 extending downward from the leading edge (inner edge) of the extending wall portion 17. It also includes a short-side outer surface base wall portion 15, a short-side frame wall portion 19 extending inward from the outer peripheral edge of the short-side outer surface base wall portion 15 into the container body 2, a pair of short-side shaft projections 20 that protrude laterally from the lower part of the outer surface of the portions corresponding to the left and right side portions of the lower wall portion 18 among the short-side frame wall portions 19 as a pair of side wall side shaft portions of the short-side base component 11, inner surface adjusting portions 21 extending laterally from the inner edge portions of the container body 2 corresponding to the left and right side portions of the upper wall portion 16 among the short-side frame wall portions 19 to the side of the short-side base component 11, and locking component portions 22 protruding inward from the side edge portions of each inner surface adjusting portion 21 into the container body 2.

[0018] As shown in FIGS. 9, 19, and 20, in this embodiment, the short-side frame wall portion 19 has a double-wall structure in the inner and outer peripheral directions of the portion on the inner side of the container body 2, and a short-side insertion space 23 that opens inward into the container body 2 is formed at this portion. Further, regarding the inner peripheral side component of the short-side frame wall portion 19 in the double-wall structure, the inner edge of the container body 2 extends continuously at the same position in the thickness direction of the short-side side wall portion 8 over the entire circumference. Also, as shown in FIGS. 8, 9, etc., the locking component portion 22 includes a locking wall portion 24 that protrudes inward from the side edge portions of each inner surface adjusting portion 21 into the container body 2 and extends in the height direction of the short-side side wall portion 8 and has a substantially rectangular plate shape, and a locking hole portion 25 that opens on the central portion side in the width direction of the short-side side wall portion 8 among the locking wall portions 24.

[0019] As shown in FIG. 10, the short-side inner surface component 13 includes a short-side inner surface base wall portion 27 having a substantially rectangular shape in a front view, and a short-side orthogonal wall portion 28 extending outward from the outer peripheral edge of the short-side inner surface base wall portion 27 to the outside of the container body 2. As shown in FIG. 11, a short-side tip wall portion 29 formed so as to reduce the thickness on the outer peripheral side of the short-side orthogonal wall portion 28 is provided at a portion on the tip side (the outside of the container body 2) of the short-side orthogonal wall portion 28. Then, as shown in FIGS. 19 and 20, by inserting (press-fitting) the short-side tip wall portion 29 of the short-side inner surface component 13 into the short-side insertion space 23 of the short-side base component 11, the short-side inner surface component 13 is assembled to the short-side base component 11, and a short-side inner space 12 is formed between the short-side base component 11 and the short-side inner surface component 13. Further, in the present embodiment, a heat insulating member 10 is provided in the short-side inner space 12, and the heat insulating member 10 is made of foamed polyurethane.

[0020] Furthermore, in the present embodiment, a surface treatment for imparting a reactive activity for joining with the heat insulating member 10 is performed on the entire surface defining the short-side internal space 12 among the short-side base component 11 and the short-side inner surface component 13. Examples of the surface treatment include frame treatment, corona discharge treatment, plasma treatment, and primer treatment. By performing these treatments, the surface of the polyolefin-based resin, which originally has a low activity, can be made into a highly active surface where active groups and dangling bonds (unbonded hands in atoms) are exposed. The short-side base component 11 and the short-side inner surface component 13 that have undergone the surface treatment are assembled, and a raw material liquid of the heat insulating member 10 (in this example, an uncured polyurethane-based resin) is injected into the short-side internal space 12 and solidified to form the heat insulating member 10. At this time, since the above surface treatment is performed on the surface defining the short-side internal space 12, the short-side base component 11, the short-side inner surface component 13, and the heat insulating member 10 are strongly joined. Incidentally, the heat insulating member 10 is provided in the same manner for the long-side side wall portion 9 and the bottom wall component 4, which will be described later. Regarding the lid body 3, although the surface treatment is not performed, the point that the raw material liquid of the heat insulating member 10 is injected and solidified is the same. In addition, inlets for injecting the raw material liquid of the heat insulating member 10 are provided in concave portions formed on the mounting surface so that the plugs attached to the inlets do not protrude from the mounting surface, for the short-side side wall portion 8, the long-side side wall portion 9, the bottom wall component 4, and the lid body 3, respectively.

[0021] As shown in FIGS. 12 and 15, each long-side side wall portion 9 includes a long-side base component 31 that constitutes most of the outer portion of the long-side side wall portion 9, and a long-side inner surface component 33 for forming a long-side internal space 32 (see FIGS. 20 and 21) between the inner surface of the long-side base component 31. The long-side base component 31 and the long-side inner surface component 33 are made of a polyolefin-based resin (polypropylene in the present embodiment).

[0022] As shown in FIG. 12, FIG. 13, etc., the long-side base component 31 includes a long-side outer surface base wall portion 35 having a substantially rectangular shape in a front view, a long-side frame wall portion 36 extending inward from the outer peripheral edge of the long-side outer surface base wall portion 35 into the container body 2, a plurality of curved protrusions 37 protruding downward from a plurality of locations on the lower side of the long-side frame wall portion 36 and having a substantially semi-circular shape with a curved lower side when the long-side base component 31 is viewed from the side (side edge portion side), and long-side shaft protrusions 38 as a pair of side wall side shaft portions protruding from the curved protrusions 37 provided on both side portions of the lower side of the long-side frame wall portion 36 to the side of the long-side base component 31, respectively.

[0023] As shown in FIG. 13, the upper side portion of the long-side frame wall portion 36 is configured such that the extension length from the long-side outer surface base wall portion 35 is shorter than that of the side edge portion of the long-side frame wall portion 36. Further, a folded-back wall portion 39 extending downward from the inner edge of the upper side portion of the long-side frame wall portion 36 and an alternative wall portion 40 extending inward from the lower edge of the folded-back wall portion 39 into the container body 2 are provided, and the inner edge of the alternative wall portion 40 extends continuously with the inner edge of the side edge portion of the long-side frame wall portion 36. As shown in FIG. 13, FIG. 14, FIG. 20, and FIG. 21, in the present embodiment, among both side edge portions, the lower side portion of the long-side frame wall portion 36, and the alternative wall portion 40, the inner side portion of the container body 2 has a double-wall structure in the inner and outer circumferential directions of the long-side frame wall portion 36, and a long-side insertion space 41 opening inward in the container body 2 is formed at the portion.

[0024] Furthermore, the lower side portion of the long-side frame wall portion 36 includes a long-side frame lower first wall portion 42 that extends inward from the long-side outer surface base wall portion 35 of the container body 2, a long-side frame lower vertical wall portion 43 that extends downward from the leading edge of the long-side frame lower first wall portion 42, and a long-side frame lower second wall portion 44 that extends inward from the lower portion of the long-side frame lower vertical wall portion 43. The long-side frame lower second wall portion 44 has a double-wall structure. Further, for the inner peripheral side component of the double-wall structure, the inner edge on the inner side of the container body 2 continuously extends at the same position in the thickness direction of the long-side side wall portion 9 over the entire circumference. In contrast, for the outer peripheral side component of the double-wall structure, the portion corresponding to the long-side frame lower second wall portion 44 protrudes significantly inward of the container body 2 compared to the other portions of the outer peripheral side component of the double-wall structure, and also protrudes significantly inward of the container body 2 compared to the inner peripheral side component of the double-wall structure (for the other portions of the outer peripheral side component of the double-wall structure, the inner peripheral side component of the double-wall structure protrudes more inward of the container body 2). The curved protrusion 37 is provided to protrude downward from the outer peripheral side component of the double-wall structure corresponding to the long-side frame lower second wall portion 44.

[0025] As shown in FIGS. 7 and 12, on both side portions on the outer surface side of the long-side outer surface base wall portion 35, in the assembled state of the container body 2, a locked component portion 45 is provided that substantially abuts and locks with the locking component portion 22 of the short-side side wall portion 8. The locked component portion 45 includes a locked wall portion 46 configured to recess the corresponding portion of the long-side outer surface base wall portion 35 inward of the container body 2 (such that the thickness on the outer surface side of the short-side side wall portion 8 is omitted), and a locking protrusion 47 that protrudes outward from the locked wall portion 46 of the container body 2.

[0026] In the assembled state of the container body 2, the outer surface side of the locked component 45 of the long-side side wall portion 9 is substantially in contact with the locking component 22 of the short-side side wall portion 8, whereby the displacement of the long-side side wall portion 9 of the container body 2 outward is restricted. Further, both side portions of the long-side side wall portion 9 (the side portions of the locked component 45) are substantially in contact with the inner surface of the short-side side wall portion 8, whereby the displacement of the short-side side wall portion 8 of the container body 2 inward is restricted. Furthermore, the locking protrusion 47 of the locked component 45 of the long-side side wall portion 9 is inserted into the locking hole portion 25 of the locking component 22 of the short-side side wall portion 8 to be in a locked state, whereby the displacement of the short-side side wall portion 8 of the container body 2 outward and the relative displacement between the short-side side wall portion 8 and the long-side side wall portion 9 in the vertical direction are restricted.

[0027] As shown in FIG. 15, the long-side inner surface component 33 includes a long-side inner surface base wall portion 49 having a substantially rectangular shape in a front view, and a long-side orthogonal wall portion 50 extending outward from the outer peripheral edge of the long-side inner surface base wall portion 49 to the outside of the container body 2. A long-side tip wall portion 51 formed so as to reduce the thickness on the outer peripheral side of the long-side orthogonal wall portion 50 is provided at a portion on the outside of the container body 2 of the long-side orthogonal wall portion 50. Then, as shown in FIGS. 20 and 21, by inserting (press-fitting) the long-side tip wall portion 51 of the long-side inner surface component 33 into the long-side insertion space 41 of the long-side base component 31, the long-side inner surface component 33 is assembled to the long-side base component 31, and a long-side internal space 32 is formed between the long-side base component 31 and the long-side inner surface component 33. Further, in the present embodiment, a heat insulating member 10 made of foamed polyurethane is provided in the long-side internal space 32.

[0028] As shown in FIGS. 16 to 18 and the like, the bottom wall component 4 includes a bottom wall base component 61 that constitutes most of the upper part of the bottom wall component 4, and a bottom wall lower surface component 63 that constitutes the lower surface side of the bottom wall part 5 and forms a bottom wall internal space 62 (see FIGS. 19 and 21) between the lower surface of the bottom wall base component 61. The bottom wall base component 61 and the bottom wall lower surface component 63 are made of a polyolefin resin (in this embodiment, polypropylene). As shown in FIG. 16 and the like, the bottom wall base component 61 includes a bottom wall upper surface base wall part 64 that constitutes the upper surface of the bottom wall part 5 having a substantially rectangular shape in plan view, a short side base part 6 that protrudes upward from the short side edge part of the bottom wall upper surface base wall part 64, and a long side base part 7 that protrudes upward from the long side edge part of the bottom wall upper surface base wall part 64.

[0029] The short side base part 6 includes a short side base inner lower vertical wall part 66 that extends upward from the short side edge part of the bottom wall upper surface base wall part 64, a short side base middle wall part 67 that extends outward of the container body 2 from the upper edge part of the short side base inner lower vertical wall part 66, a short side base inner upper vertical wall part 68 that extends upward from the outer edge part of the container body 2 of the short side base middle wall part 67, short side base shaft wall parts 69 that extend upward from both side edge parts of the short side base middle wall part 67, a short side base upper stage wall part 70 that extends outward of the container body 2 from the upper edge parts of the short side base inner upper vertical wall part 68 and the short side base shaft wall parts 69, a short side base outer vertical wall part 71 that extends downward from the outer edge part of the container body 2 of the short side base upper stage wall part 70, a shaft wall surface adjusting part 72 that extends outward of the container body 2 (sideways in the lateral direction of the short side side wall part 8) from the inner edge of the container body 2 of the short side base shaft wall part 69, and a locking wall support wall part 73 that protrudes from the shaft wall surface adjusting part 72 toward the longitudinal center part side of the long side base part 7.

[0030] The short-side bearing portion 74 serving as the base-side shaft portion of the present embodiment is provided at the lower part of each short-side base shaft wall portion 69. As shown in FIG. 22, a short-side shaft protrusion 20 is inserted into the short-side bearing portion 74 and is substantially fitted so as to allow the rotation of the short-side shaft protrusion 20. Thereby, the short-side side wall portion 8 is connected (shaft-supported) to the short-side base portion 6 so as to be rotationally displaceable. Further, as shown in FIGS. 16 and 22, a short-side shaft guide groove portion 75 extending in a substantially vertical direction is provided from a position slightly above the short-side bearing portion 74 to the upper edge portion of the short-side base shaft wall portion 69 in the short-side base shaft wall portion 69. In addition, as shown in FIGS. 3, 4, and 22, the short-side base outer vertical wall portion 71 has a shape in which portions corresponding to the short-side bearing portion 74 and the short-side shaft guide groove portion 75 are omitted, and the short-side bearing portion 74 also opens to the outer side of the container body 2. However, the short-side base upper-stage wall portion 70 only has a recess for opening the short-side shaft guide groove portion 75 upward at a portion located above the short-side shaft guide groove portion 75, and the portion on the outer side of the container body 2 is not omitted.

[0031] As shown in FIGS. 16 and the like, the long-side base portion 7 includes a long-side base inner lower vertical wall portion 77 extending upward from the long-side edge portion of the upper surface base wall portion 64 of the bottom wall, a long-side base middle-stage wall portion 78 extending outward from the upper edge portion of the long-side base inner lower vertical wall portion 77 to the outer side of the container body 2, a long-side base inner upper vertical wall portion 79 extending upward from the outer edge portion of the long-side base middle-stage wall portion 78 on the outer side of the container body 2, a long-side base upper-stage wall portion 80 extending outward from the upper edge portion of the long-side base inner upper vertical wall portion 79 to the outer side of the container body 2, and a long-side base outer vertical wall portion 81 extending downward from the outer edge portion of the long-side base upper-stage wall portion 80 on the outer side of the container body 2. Both side portions of the long-side base upper-stage wall portion 80 are inclined upward toward the side and are connected to the short-side base portion 6, and the locking wall support wall portions 73 of the short-side base portion 6 are connected to the upper surface sides of both side portions of the long-side base upper-stage wall portion 80.

[0032] Also, as shown in FIG. 16, on the long-side base portion 7, a rotation allowance recess 82 is provided that allows the curved protrusion 37 of the long-side side wall portion 9 to be inserted between the long-side base middle wall portion 78 and the long-side base inner lower vertical wall portion 77 (see FIG. 21). The rotation allowance recesses 82 are provided at both ends of the long-side base portion 7 and also at a plurality of positions corresponding to the curved protrusion 37 at intermediate positions in the longitudinal direction of the long-side base portion 7. The long-side bearing portion 83, which is the base-side shaft portion in the present embodiment, is provided at positions on the short-side base inner lower vertical wall portion 66 of the short-side base portion 6 that face the rotation allowance recesses 82 provided at both ends of the long-side base portion 7, respectively. The long-side shaft protrusion 38 is inserted into the long-side bearing portion 83 and is substantially fitted so as to allow the rotation of the long-side shaft protrusion 38. Thereby, the long-side side wall portion 9 is rotatably connected (pivotally supported) to the short-side base portion 6. In particular, in the present embodiment, the long-side bearing portion 83 extends from the lower edge portion to the upper edge portion of the short-side base inner lower vertical wall portion 66. That is, when the long-side side wall portion 9 is in the folded posture (the short-side side wall portion 8 remains in the standing posture), the long-side side wall portions 9 in the folded posture are allowed to be stacked vertically within the range where the long-side shaft protrusion 38 is inserted into the long-side bearing portion 83 (see FIG. 7), and the long-side side wall portion 9 is configured to be vertically displaceable relative to the bottom wall component portion 4.

[0033] Also, as shown in FIG. 17 and the like, in the present embodiment, the lower portions of the short-side base outer vertical wall portion 71 and the long-side base outer vertical wall portion 81 have a double-wall structure in the inner and outer circumferential directions (the inner and outer directions of the container body 2) of the short-side base portion 6 and the long-side base portion 7, and a bottom wall insertion space 84 that opens downward is formed at this portion.

[0034] As shown in Fig. 18, the bottom wall lower surface component 63 includes a bottom wall lower surface base wall portion 86 having a substantially rectangular shape in a bottom view, and a bottom wall orthogonal wall portion 87 protruding upward from the outer peripheral edge of the bottom wall lower surface base wall portion 86. As shown in Figs. 4 and 18, the outer peripheral portion of the bottom wall lower surface base wall portion 86 has a convex shape protruding downward. On the lower surface side of the bottom wall lower surface base wall portion 86, ribs protruding downward are provided in a lattice pattern on the inner peripheral side of the outer peripheral portion of the bottom wall lower surface base wall portion 86. The bottom wall orthogonal wall portion 87 extends in a substantially vertical direction upward from the bottom wall lower surface base wall portion 86, further extends outward from the container body 2 from its leading edge, and further forms a stepped shape that extends substantially vertically upward with a curved portion interposed therebetween.

[0035] As shown in Fig. 18 and the like, a bottom wall tip wall portion 88 formed so as to reduce the thickness on the outer peripheral side of the bottom wall orthogonal wall portion 87 is provided at the upper portion of the bottom wall orthogonal wall portion 87. Then, as shown in Figs. 19, 21 and the like, by inserting (press-fitting) the bottom wall tip wall portion 88 of the bottom wall lower surface component 63 into the bottom wall insertion space 84 of the bottom wall base component 61, the bottom wall lower surface component 63 is assembled to the bottom wall base component 61, and a bottom wall internal space 62 is formed between the bottom wall base component 61 and the bottom wall lower surface component 63. Further, in the present embodiment, a heat insulating member 10 made of foamed polyurethane is provided in the bottom wall internal space 62.

[0036] As shown in Figs. 1 and 5, the lid body 3 is configured to be able to close the upper surface opening 91 (see Fig. 2) of the container body 2 in the assembled state. The lid body 92 constituting the outer shape of the lid body 3 in the present embodiment is integrally formed of a polyolefin resin (polypropylene in the present embodiment) such that a lid body internal space 93 (see Figs. 23 and 25) is formed by blow (hollow) molding. Further, in the present embodiment, a heat insulating member 10 made of foamed polyurethane is provided in the lid body internal space 93.

[0037] Now, as shown in FIGS. 19 and 20, in this embodiment, in the assembled state of the container body 2, an overlapping region is formed in which the outer surface side of the short-side side wall portion 8 and the inner surface side of the short-side base portion 6 face each other in the horizontal direction. That is, in the assembled state of the container body 2, the outer surface side of the portion of the short-side side wall portion 8 where the thickness of the short-side side wall portion 8 is defined by the lower side wall portion 18 of the short-side base component 11 and the short-side inner surface component 13 (hereinafter referred to as the "short-side side wall overlapping region 101") and the inner surface side of the portion of the short-side base portion 6 where the thickness of the short-side base portion 6 is defined by the short-side base inner upper vertical wall portion 68 and the short-side base outer vertical wall portion 71 (hereinafter referred to as the "short-side base overlapping region 102") are configured to face each other in the horizontal direction (the inside-outside direction of the container body 2). In addition, in the short-side side wall overlapping region 101 and the short-side base overlapping region 102, similar to the other regions of the short-side side wall portion 8 and the short-side base portion 6, a short-side internal space 12 and a bottom wall internal space 62 are provided, and heat insulating members 10 are provided in the short-side internal space 12 and the bottom wall internal space 62, respectively.

[0038] As shown in FIGS. 16 and 22, the short-side bearing portion 74 of the present embodiment is provided through the short-side base shaft wall portion 69, and the short-side base outer vertical wall portion 71 is also omitted in the range where the short-side shaft guide groove portion 75 extending above the short-side bearing portion 74 is provided. Therefore, with respect to the short-side shaft protrusion 20 and the short-side bearing portion 74, there is a portion where no heat insulating member 10 is interposed between the external space of the container body 2. In this regard, in the present embodiment, as shown in FIG. 20, the heat insulating member 10 of the short-side side wall portion 8 and the heat insulating member 10 of the long-side side wall portion 9 are disposed on the inner side of the container body 2 of the short-side shaft protrusion 20 and the short-side bearing portion 74. Above, the heat insulating member 10 of the lid body 3 is disposed, and below, the heat insulating member 10 of the bottom wall component portion 4 is disposed (see FIG. 22). Moreover, as shown in FIG. 20, in the lateral width direction of the long-side side wall portion 9, the portion (side surface) of the long-side side wall portion 9 where the heat insulating member 10 is present and the portion (inner surface) of the short-side side wall portion 8 where the heat insulating member 10 is present are configured to be close (or in contact) with each other (substantially having no gap). That is, also at the peripheral edge portions of the short-side shaft protrusion 20 and the short-side bearing portion 74, the internal space and the external space of the container body 2 are insulated by the heat insulating member 10.

[0039] Also, as shown in FIG. 21, with respect to the long-side side wall portion 9, in the assembled state of the container body 2, the outer surface side of the long-side frame lower vertical wall portion 43 faces the inner surface side of the long-side base inner upper vertical wall portion 79 of the long-side base portion 7 (the outer surface side of the long-side side wall portion 9 and the inner surface side of the long-side base portion 7 form an overlapping region facing each other in the horizontal direction). In the present embodiment, although the portion of the long-side side wall portion 9 where the long-side internal space 32 (heat insulating member 10) is provided is not configured to face the portion of the long-side base portion 7 where the bottom wall internal space 62 (heat insulating member 10) is provided in the horizontal direction (the inside-outside direction of the container body 2), the distance between the portion where the heat insulating member 10 of the long-side side wall portion 9 is present and the portion where the heat insulating member 10 of the long-side base portion 7 is present is relatively close. Regarding the curved protrusion 37 of the long-side side wall portion 9, the portion where the heat insulating member 10 of the long-side base portion 7 is present is disposed on the outer side of the container body 2.

[0040] Further, as shown in FIG. 2, in the present embodiment, the curved protrusion 37 of the long-side side wall portion 9 faces the internal space (article storage space) of the container body 2, and no heat insulating member is provided on the curved protrusion 37. Therefore, regarding the long-side shaft protrusion 38 and the long-side bearing portion 83, there is a portion where no heat insulating member 10 is interposed between the inner space of the container body 2. In this regard, as shown in FIG. 16, a bottom wall component 4 (short-side base portion 6) having the heat insulating member 10 inside is arranged on the outer side of the container body 2 of the long-side shaft protrusion 38 and the long-side bearing portion 83. Further, regarding the upper and lower sides as well, the heat insulating member 10 of the short-side side wall portion 8 and the heat insulating member 10 of the bottom wall component 4 are arranged (the heat insulating member 10 of the long-side base portion 7 is arranged on the outer side of the container body 2 of the curved protrusion 37). That is, also at the peripheral portions of the long-side shaft protrusion 38 and the long-side bearing portion 83, the space between the internal space and the external space of the container body 2 is insulated by the heat insulating member 10.

[0041] Now, as shown in FIGS. 3, 16, 19, etc., in the present embodiment, on the inner surface side of each short-side base portion 6, a base-side engaging portion 103 (protrusion) protruding inward from the short-side base inner upper vertical wall portion 68 of the container body 2 is provided. The base-side engaging portions 103 provided on each short-side base portion 6 are provided at two locations in a pair of left and right as one set in the width direction of the short-side base portion 6. That is, the base-side engaging portion 103 of the present embodiment is provided in the short-side base overlapping region 102. Further, the base-side engaging portion 103 has a protruding piece shape with the vertical direction as the longitudinal direction, and its upper side portion (upper surface) is flush with the upper surface of the short-side base upper step wall portion 70, and its lower side portion is spaced above the short-side base middle step wall portion 67.

[0042] On the other hand, as shown in FIGS. 3, 8, 19, etc., on the lower wall portion 18 on the outer surface side of the short-side side wall portion 8, concave side wall engaging portions 104 (recesses) enabling insertion of a pair of left and right base-side engaging portions 103 are provided at two locations corresponding to the two base-side engaging portions 103 forming one set. That is, the side wall engaging portion 104 of the present embodiment is provided in the short-side side wall overlapping region 101. Further, also in the portion of the lower wall portion 18 where the side wall engaging portion 104 is provided, a short-side inner space 12 is formed between the short-side inner surface component 13, and a heat insulating member 10 is provided.

[0043] Also, in the present embodiment, the lower wall portion 18 of the short-side side wall portion 8 is located on the inner side of the container body 2 with respect to the upper wall portion 16, and the lower portion on the outer surface side of the short-side side wall portion 8 has a shape in which it is cut out outside the lower wall portion 18 and below the extending wall portion 17. In the present embodiment, the region outside the lower wall portion 18 and below the extending wall portion 17 corresponds to the step recess 105. Further, the upper edge portion of the side wall engaging portion 104 is flush with the lower surface of the extending wall portion 17 (the upper edge portion of the step recess 105).

[0044] Then, as shown in Fig. 19, by setting the short-side side wall portion 8 in the upright position (the container body 2 in the assembled state), the short-side base overlapping region 102 of the short-side base portion 6 is accommodated in the step recess 105 in a fitting manner. Further, as shown in Figs. 19 and 20, a pair of two base-side engaging portions 103 are inserted into each side wall-side engaging portion 104, and the side wall-side engaging portion 104 and the base-side engaging portion 103 are engaged with each other in a concave-convex manner in the horizontal direction. Also, in the assembled state of the container body 2, the side wall-side engaging portion 104 and the base-side engaging portion 103 are configured to be sandwiched by the heat insulating member 10 in the horizontal direction and the vertical direction. That is, the side wall-side engaging portion 104 and the base-side engaging portion 103 are sandwiched by the heat insulating member 10 of the short-side side wall portion 8 and the heat insulating member 10 of the short-side base portion 6 in the inner-outer direction (the thickness direction of the short-side side wall portion 8) of the container body 2 in the assembled state of the container body 2, and are sandwiched by the heat insulating member 10 of the short-side side wall portion 8 in the lateral width direction of the short-side side wall portion 8, and are sandwiched by the heat insulating member 10 of the short-side side wall portion 8 (and the heat insulating member 10 of the short-side base portion 6) in the vertical direction.

[0045] In addition, the base-side engaging portion 103 protrudes in a direction orthogonal to the short-side base inner upper vertical wall portion 68 having a substantially flat plate shape. On the other hand, as shown in FIGS. 8 and 20, both side edge portions (inner side surfaces) of the side-wall-side engaging portion 104 are inclined and extend so as to gradually increase the distance between them toward the outer side of the container body 2 when the short-side side wall portion 8 is in the standing posture. For this reason, when the short-side side wall portion 8 in the folded posture is changed to the standing posture, if the side-wall-side engaging portion 104 is displaced from an appropriate relative position where it is engaged with the base-side engaging portion 103 in the lateral width direction of the short-side side wall portion 8, that is, if the short-side side wall portion 8 is displaced from an appropriate relative position with respect to the short-side base portion 6, the base-side engaging portion 103 abuts against the inner side surface (hereinafter referred to as the "inclined portion 106") of the side-wall-side engaging portion 104. Further, by displacing the short-side side wall portion 8 from the abutting state toward the standing posture side, the base-side engaging portion 103 is in a state of being in sliding contact with the inclined portion 106, and the short-side base portion 6 is guided to the appropriate relative position. In the assembled state of the container body 2, substantially the entire (portion) of the base-side engaging portion 103 is accommodated inside the side-wall-side engaging portion 104, and the lower side wall portion 18 of the short-side side wall portion 8 and the short-side base inner upper vertical wall portion 68 of the short-side base portion 6 are in contact with or close to each other.

[0046] In addition, in the process of changing the container body 2 in the folded state to the assembled state, when only the short-side side wall portion 8 is in the standing posture (the state shown in FIG. 7), the lower surface (the upper edge portion of the stepped concave portion 105) of the extending wall portion 17 and the upper edge portion of the side-wall-side engaging portion 104 are in contact with and supported by the upper surface of the short-side base upper stepped wall portion 70 of the short-side base portion 6 and the upper side portion (upper surface) of the base-side engaging portion 103 (see FIGS. 16 and 19). Thereby, even if the operator does not hold the short-side side wall portion 8 in the standing posture, the short-side side wall portion 8 is maintained (self-standing) in the standing posture.

[0047] Also, as shown in FIG. 6, the lid body 3 is configured to be able to cover the folded container body 2 in a state of being placed on the upper surface of the short-side base portion 6 (the upper wall portion 70 of the short-side base). At this time, as shown in FIG. 23, the lower surface side of the lid body 3 abuts and is supported not only on the upper surface of the upper wall portion 70 of the short-side base but also on the upper side portion (upper surface) of the base-side engaging portion 103 provided on the same plane as the upper surface of the upper wall portion 70 of the short-side base.

[0048] In addition, as shown in FIGS. 1, 26, etc., on the upper wall portion 16 of each short-side side wall portion 8, at a position below the upper edge portion of the upper wall portion 16, a handle portion 107 is provided to facilitate the operator to place a hand when lifting the assembled container body 2 (container 1). Also, in the portion of the upper wall portion 16 where the handle portion 107 is provided, a short-side internal space 12 is formed between the short-side inner surface component 13, and a heat insulating member 10 is provided. Note that in the present embodiment, the long-side side wall portion 9 where the side wall side engaging portion is not provided is not provided with a handle portion.

[0049] Furthermore, as shown in FIGS. 1, 2, and 26, on the upper wall portion 16 of each short-side side wall portion 8, in a state where the lid body 3 is covered on the container body 2 in the assembled state, a hanging portion 108 is formed in a concave shape from a position slightly below the lower edge portion of the outer peripheral surface of the lid body 3 to the upper side portion of the short-side side wall portion 8. Thereby, when removing the lid body 3 from the container body 2, it becomes possible to lift the lid body 3 by hanging the fingertips on the lower surface side of the lid body 3 through the hanging portion 108.

[0050] As shown in FIGS. 2, 25, and 27, on the upper sides of the short-side side wall portion 8 and the long-side side wall portion 9, there are provided a lid-stopping protrusion 111 including a base portion 111a that protrudes upward from the upper surface of the upper side of the short-side frame wall portion 19 and the long-side frame wall portion 36 and extends in the lateral width direction of the short-side side wall portion 8 and the long-side side wall portion 9, an upper flange portion 111b that protrudes inward of the container body 2 from the upper side of the base portion 111a, and an intermediate flange portion 111c that protrudes outward of the container body 2 from the intermediate position in the height direction of the base portion 111a. On the other hand, as shown in FIGS. 24, 25, and 27, on the lower surface side of the lid body 3, there is provided a lid-stopping recess 112 into which the upper flange portion 111b of the lid-stopping protrusion 111 is substantially fitted. Further, as shown in FIGS. 24 and 25, an engaging protrusion 113 is provided that protrudes inward of the lid-stopping recess 112 from the side edge portion on the inner peripheral side of the lid-stopping recess 112 and engages with the lower surface side of the upper flange portion 111b of the lid-stopping protrusion 111. In addition, as shown in FIG. 26, the handle portion 108 is provided in a configuration in which the target portion of the intermediate flange portion 111c is omitted. Also, as shown in FIG. 24, at the center of the lid body 3 (lid main body 92), there is provided a connecting wall portion 114 that is configured by deforming the wall portion constituting the lower surface of the lid main body 92 upward and connecting the wall portion constituting the lower surface of the lid main body 92 and the wall portion constituting the upper surface of the lid main body 92.

[0051] As described in detail above, according to the present embodiment, when the container body 2 is in an assembled state, the side wall side engaging portion 104 and the base side engaging portion 103 engage with each other in a concave-convex manner in the horizontal direction. Therefore, when an article is stored in the container body 2 in the assembled state and the container 1 is carried or the like by placing a hand on the short side side wall portion 8 (the handle portion 107) provided with the side wall side engaging portion 104, the burden on the connecting mechanism (the short side shaft protruding portion 20 and the short side bearing portion 74) that rotatably connects the short side side wall portion 8 to the bottom wall constituting portion 4 can be reduced. As a result, the burden on the connecting mechanism (the long side shaft protruding portion 38 and the long side bearing portion 83) that rotatably connects the long side side wall portion 9 to the bottom wall constituting portion 4 can also be reduced. Therefore, while protecting the connecting mechanism, the connection state between the short side side wall portion 8 and the long side side wall portion 9 and the bottom wall constituting portion 4 can be stabilized, and a situation such as the short side side wall portion 8 and the long side side wall portion 9 coming off from the bottom wall constituting portion 4 can be prevented.

[0052] In addition, the connection state between the short-side side wall portion 8 and the long-side side wall portion 9 and the bottom wall component 4 in the assembled state of the container body 2 is stabilized by the side wall side engaging portion 104 and the base side engaging portion 103, so that the connection mechanism can be simplified, the range in which the heat insulation property decreases due to the provision of the connection mechanism can be reduced, and the heat insulation property of the peripheral portion of the connection mechanism can be configured not to decrease as much as possible. In the present embodiment, the short-side shaft protrusion 20 and the long-side shaft protrusion 38 protrude laterally from the side surfaces of the short-side side wall portion 8 and the long-side side wall portion 9. For example, compared with a configuration in which a plurality of shaft portions protruding downward from the lower side portions of the short-side side wall portion 8 and the long-side side wall portion 9 are provided, the heat insulation property and airtightness of the lower side portions can be improved. Further, the side wall side engaging portion 104 and the base side engaging portion 103 are in a state of being sandwiched between the heat insulating members 10 in the horizontal direction and the vertical direction when the container body 2 is in the assembled state, and it is possible to prevent the heat insulation property from decreasing in the peripheral portions of the side wall side engaging portion 104 and the base side engaging portion 103. Therefore, while improving the durability of the connection mechanism by providing the side wall side engaging portion 104 and the base side engaging portion 103, the decrease in the heat insulation property due to the provision of the side wall side engaging portion 104 and the base side engaging portion 103 is avoided, and the cold storage and heat preservation properties of the container 1 can be improved.

[0053] Also, in the assembled state of the container body 2, the heat insulating members 10 of the short-side side wall portion 8 and the long-side side wall portion 9 are arranged on the inner side of the container body 2 with respect to the short-side shaft protrusion 20 and the short-side bearing portion 74. Further, in the assembled state of the container body 2, the heat insulating member 10 of the bottom wall component 4 (short-side base portion 6) is arranged on the outer side of the container body 2 with respect to the long-side shaft protrusion 38 and the long-side bearing portion 83. For this reason, it is possible to suppress the decrease in the heat insulation property of the peripheral portion of the connection mechanism. Therefore, while enhancing the cold storage and heat preservation effects of the container 1, the connection mechanism can be reliably provided.

[0054] In addition, the inner surface of the side-wall side engaging portion 104 is configured as an inclined portion 106 that can guide relative displacement toward an appropriate relative position side where the side-wall side engaging portion 104 is in an engaged state with respect to the base-side engaging portion 103 in the lateral width direction of the short-side side wall portion 8. For this reason, when the short-side side wall portion 8 in the folded posture is set to the standing posture, in order to facilitate engagement (insertion) of the base-side engaging portion 103 with the side-wall side engaging portion 104, while securing a clearance between the side-wall side engaging portion 104 and the base-side engaging portion 103 in the lateral width direction of the short-side side wall portion 8, when the container body 2 is in a completely assembled state, it can be configured such that the side-wall side engaging portion 104 and the base-side engaging portion 103 are in an appropriate relative positional relationship. Therefore, it is possible to improve the assemblability of the container body 2 while stabilizing the engaged state of the side-wall side engaging portion 104 and the base-side engaging portion 103. Further, with respect to the short-side side wall portion 8 and the bottom wall constituting portion 4, an appropriate relative positional relationship can also be achieved in the lateral width direction of the short-side side wall portion 8 (the rotational axis direction of the short-side side wall portion 8), and the connection state of the short-side side wall portion 8 with respect to the bottom wall constituting portion 4 can be stabilized (preventing the short-side shaft protrusion 20 from coming out of the short-side bearing portion 74 and falling off). In addition, by setting the relative position of the short-side side wall portion 8 with respect to the bottom wall constituting portion 4 to an appropriate position, the engagement operation between the short-side side wall portion 8 and the long-side side wall portion 9 (engagement between the engaging structure portion 22 and the engaged structure portion 45) can be made relatively smooth.

[0055] Further, when the container body 2 in the folded state is set to the assembled state, the short-side side wall portion 8 can be made to stand on its own with only the short-side side wall portion 8 in the upright posture. In particular, since the upper side (upper surface) of the base-side engaging portion 103 that protrudes inward of the container body 2 from the short-side base inner upper vertical wall portion 68 of the short-side base portion 6 is flush with the upper surface of the short-side base portion 6 (the short-side upper-stage wall portion 70), even if the short-side side wall portion 8 in the upright posture is slightly displaced inward of the container body 2, the upper edge portion (the lower surface of the extending wall portion 17) of the step recess 105 of the short-side side wall portion 8 in the upright posture will also abut against and be supported by the upper surface of the base-side engaging portion 103. Therefore, it is possible to avoid a situation where the short-side side wall portion 8 in the upright posture simply shifts to a behavior of displacing toward the folded posture side due to a slight displacement inward of the container body 2, and the self-standing stability of the short-side side wall portion 8 can be enhanced.

[0056] In addition, by covering the container body 2 in the assembled state with the lid body 3, the cold insulation and heat insulation properties of the container 1 can be further enhanced. Also, the lid body 3 can be covered on the container body 2 in the folded state, and the container 1 can be compactly assembled with the container body 2 and the lid body 3 set as a set. Furthermore, by covering the container body 2 in the folded state with the lid body 3, the lower surface side of the lid body 3 abuts against and is supported not only on the upper surface of the short-side base portion 6 (the short-side upper-stage wall portion 70) but also on the upper surface of the base-side engaging portion 103. Therefore, it is possible to achieve the stabilization of the state where the lid body 3 is covered on the container body 2 in the folded state.

[0057] Note that the present invention is not limited to the description of the above embodiment, and for example, it may be implemented as follows. Of course, other application examples and modification examples not exemplified below are also naturally possible.

[0058] (a) In the above-described embodiment, the short-side side wall portion 8 is configured as the first-standing side wall portion, but it is also possible to configure the long-side side wall portion 9 as the first-standing side wall portion. Further, in the above-described embodiment, the short-side side wall portions 8 in the folded posture do not overlap vertically with each other, and both short-side side wall portions 8 correspond to the first-standing side wall portion. However, a configuration in which the short-side side wall portions 8 in the folded posture overlap vertically may be adopted, and the one that overlaps on the upper side may be considered to correspond to the first-standing side wall portion. When adopting such a configuration, the base-side engaging portion 103 may be configured to be flush with the upper surface of the base portion (e.g., one short-side base portion 6) only with respect to the base portion (corresponding or capable of corresponding) to the first-standing side wall portion.

[0059] Also, in the above-described embodiment, when the container body 2 is changed from the folded state to the assembled state, the long-side base portion 7 is provided corresponding to the long-side side wall portion 9 that assumes an upright posture after the short-side side wall portion 8. However, since the long-side bearing portion 83 is provided on the short-side base portion 6 and the short-side bearing portion 74 is provided on the short-side base portion 6, it is also possible to omit the long-side base portion 7 (support the lower side portion of the long-side side wall portion 9 in the upright posture on the upper surface of the bottom wall portion 5). That is, as the base portion of the bottom wall portion constituting portion 4, when the container body 2 is changed from the folded state to the assembled state, it is sufficient that the base portion (the short-side base portion 6 in the above-described embodiment) corresponding to the side wall portion (the short-side side wall portion 8 in the above-described embodiment) that first assumes an upright posture, the short-side bearing portion 74, and the long-side bearing portion 83 are provided (configured to be a pair of substantially U-shaped in plan view with the opening portions facing each other).

[0060] (b) In the above-described embodiment, the side wall side engaging portion 104 is provided on the short side side wall portion 8, and the base side engaging portion 103 is provided on the short side base portion 6. Instead of or in addition to such a configuration, a side wall side engaging portion may be provided on the long side side wall portion 9, and a base side engaging portion may be provided on the long side base portion 7. Further, in the above-described embodiment, the handle portion 107 is provided on the short side side wall portion 8. Instead of or in addition to such a configuration, the handle portion 107 may be provided on the long side side wall portion 9. Furthermore, a base side engaging portion 103 is provided on the short side base portion 6 corresponding to the front standing side wall portion (the short side side wall portion 8 in the above-described embodiment), and by making the upper surface thereof flush with the upper surface of the short side upper base wall portion 70, it is possible to achieve stabilization when the short side side wall portion 8 is in an independent standing posture, stabilization in a state where the lid body 3 is placed on the folded container body 2, and the like. It should be noted that it is also possible to provide the upper side portion of the base side engaging portion 103 below the short side upper base wall portion 70.

[0061] Furthermore, in the above-described embodiment, the side wall side engaging portion 104 has a convex shape and the base side engaging portion 103 has a concave shape. However, the side wall side engaging portion 104 may be configured to have a concave shape and the base side engaging portion 103 may be configured to have a convex shape. Also, in the above-described embodiment, since the inner surface of the side wall side engaging portion 104 is configured as the inclined portion 106, when the short side side wall portion 8 is in the standing position, the short side side wall portion 8 is configured to be in an appropriate relative position with respect to the short side base portion 6 in the lateral width direction of the short side side wall portion 8. Instead of or in addition to such a configuration, an inclined portion may be provided in the base side engaging portion 103 (the horizontal cross-section of the base side engaging portion 103 has a substantially U shape, and the left and right side surfaces are inclined so as to gradually approach each other toward the inner side of the container body 2). It should be noted that the inclined portion 106 may be omitted.

[0062] (c) In the above embodiment, the short-side bearing portion 74 is configured by forming a through-hole in the short-side base shaft wall portion 69. However, the short-side bearing portion 74 may be formed as a concave portion instead of a through-hole, and the short-side base outer vertical wall portion 71 may be provided with respect to the range where the short-side bearing portion 74 and the short-side shaft guide groove portion 75 are provided, and the bottom wall internal space 62, and thus, the heat insulating member 10 may be provided. In this case, it is possible to improve the heat insulation property in the peripheral portions of the short-side shaft protrusion 20 and the short-side bearing portion 74.

[0063] Further, in the above embodiment, the long-side internal space 32, and thus, the heat insulating member 10 may also be provided inside the curved protrusion 37 where the long-side shaft protrusion 38 is provided. In this case, it is possible to improve the heat insulation property in the peripheral portions of the long-side shaft protrusion 38 and the long-side bearing portion 83.

[0064] (d) In the above embodiment, in the assembled state of the container body 2, the heat insulating member 10 of the long-side side wall portion 9 and the heat insulating member 10 of the long-side base portion 7 are configured not to overlap in the horizontal direction. However, for example, by increasing the height of the long-side base inner upper vertical wall portion 79, etc., in the assembled state of the container body 2, the portion of the long-side side wall portion 9 where the long-side internal space 32 (heat insulating member 10) is provided and the portion of the long-side base portion 7 where the bottom wall internal space 62 (heat insulating member 10) is provided may be configured to face each other in the horizontal direction (the inside-outside direction of the container body 2).

[0065] (e) In the above embodiment, the short-side base component portion 11 and the short-side inner surface component portion 13 are assembled, and the short-side base component portion 11 and the short-side inner surface component portion 13 are connected via the heat insulating member 10 provided in the short-side internal space 12. However, for example, the entire short-side side wall portion 8 may be integrally formed, or the short-side base component portion 11 and the short-side inner surface component portion 13 may be welded (the same applies to the long-side side wall portion 9 and the bottom wall component portion 4).

[0066] In addition, in the above-described embodiment, a surface treatment for imparting reaction activity for joining with the heat insulating member 10 is performed on the entire surface defining the short-side internal space 12 among the short-side base component 11 and the short-side inner surface component 13. However, the range of the surface treatment may be a part of the surface defining the short-side internal space 12, or a configuration without performing the surface treatment may be adopted (the same applies to the long-side side wall portion 9 and the bottom wall component 4).

[0067] Furthermore, in the above-described embodiment, the lid body 3 is integrally formed as a whole by blow molding. However, the lid body 3 may also be configured by connecting a plurality of members (for example, assembling an upper component constituting the upper surface side of the lid body 3 and a lower component constituting the lower surface side of the lid body 3, and providing the heat insulating member 10 in the lid body internal space 93).

[0068] (f) In the above-described embodiment, the long-side base component 31, the long-side inner surface component 33, the short-side base component 11, the short-side inner surface component 13, the bottom wall base component 61, the bottom wall lower surface component 63, and the lid main body 92 are made of polypropylene. However, they may be made of other polyolefin-based resins (such as polyethylene), or may be made of synthetic resins other than polyolefin-based resins (for example, ABS resin, AES resin, acrylic resin, polycarbonate, etc.). Also, the constituent materials of the long-side base component 31 (short-side base component 11, bottom wall base component 61) and the long-side inner surface component 33 (short-side inner surface component 13, bottom wall lower surface component 63) may be made different.

Explanation of Reference Numerals

[0069] 1... Container, 2... Container body, 3... Lid, 4... Bottom wall component, 5... Bottom wall part, 6... Short side base part, 7... Long side base part, 8... Short side side wall part, 9... Long side side wall part, 10... Heat insulation member, 11... Short side base component, 12... Short side internal space, 13... Short side inner surface component, 15... Short side outer surface base wall part, 18... Lower side wall part, 20... Short side shaft protrusion, 31... Long side base component, 32... Long side internal space, 33... Long side inner surface component, 38... Long side shaft protrusion, 61... Bottom wall base component, 62... Bottom wall internal space, 63... Bottom wall lower surface component, 68... Short side base inner upper vertical wall part, 70... Short side base upper stage wall part, 74... Short side bearing part, 83... Long side bearing part, 91... Upper surface opening, 92... Lid body, 93... Lid body internal space, 101... Short side side wall overlapping area, 102... Short side base overlapping area, 103... Base side engaging part, 104... Side wall side engaging part, 106... Inclined part.

Claims

1. A bottom wall component including a bottom wall portion having a substantially rectangular shape in plan view and a base portion protruding upward along a side portion of the bottom wall portion; A side wall portion rotatably connected between an upright posture erected above each side portion of the bottom wall portion and a folded posture folded toward the central portion side of the bottom wall portion with respect to the base portion of the bottom wall component; A container body capable of changing its state between an assembled state in which all the side wall portions are in the upright posture and a folded state in which all the side wall portions are in the folded posture; A lid capable of closing an upper surface opening of the container body in the assembled state; Comprising; In the container configured such that the lid can be placed on the upper surface of the base portion of the container body in the folded state, The connecting mechanism that rotatably connects the side wall portion to the bottom wall component includes a side wall side shaft portion provided on a side portion of the side wall portion and a base side shaft portion provided on the base portion. The base portion A base lower vertical wall portion extending upward from the bottom wall portion; A base middle wall portion extending outward from the upper edge portion of the base lower vertical wall portion to the outside of the container body; A base upper vertical wall portion extending upward from an edge portion on the outside of the container body of the base middle wall portion; Base shaft wall portions extending upward from both side edge portions of the base middle wall portion respectively, and comprising; The base side shaft portion is provided at a lower portion of the base shaft wall portion. An axis guide groove portion extending in a substantially vertical direction from above the base side shaft portion to the upper edge portion of the base shaft wall portion is provided in the base shaft wall portion. A container characterized in that in a state where the lid is placed on the upper surface of the base portion of the container body in the folded state, a part of the lid is configured to face the base shaft wall portion in a horizontal direction.

2. The side wall portion includes, on its outer surface side, an upper side wall portion, an extension wall portion extending inward from the lower side portion of the upper side wall portion to the inside of the container body, and a lower side wall portion extending downward from the leading edge of the extension wall portion. The container according to claim 1, characterized in that in the assembled state of the container body, the lower side wall portion and the base upper vertical wall portion are configured to face each other in a horizontal direction.

3. The base portion Comprises the base upper vertical wall portion and a base upper stage wall portion extending outward from the upper edge portions of the base shaft wall portions to the outside of the container body. The container according to claim 1 or 2, characterized in that in the container body in the folded state, the upper surface of the base upper stage wall portion is located above the upper end portions of all the side wall portions in the folded posture.

4. It is provided with a shaft wall surface adjusting part that extends outward from the inner edge of the container body of the base shaft wall part to the outer side of the container body, and The container according to any one of claims 1 to 3, characterized in that it is provided with a locking wall support wall part that protrudes from the shaft wall surface adjusting part to the side separated from the base vertical wall part.

5. The container according to claim 4, characterized in that the part corresponding to the locking wall support wall part is configured to be thinner than the part corresponding to the base shaft wall part.

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