Transport container

Abstract

To propose a transport container which enables easy positioning of an interior container located inside an exterior container.SOLUTION: A transport container 1 includes: an exterior container 2 having a storage space S1 which is open to the upper side therein; and an interior container 3 disposed in the storage space S1. The exterior container 2 has an exterior bottom wall 20 forming a bottom part of the exterior container 2. The interior container 3 has an interior bottom wall 30 forming a bottom part of the interior container 3. Positioning parts 5 which may engage with each other are respectively provided at the exterior bottom wall 20 and the interior bottom wall 30.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to a shipping container, and more particularly to a shipping container comprising an outer container and an inner container. [Background technology]

[0002] Patent Document 1 describes a transport tray that includes a box-shaped outer tray member that opens upward and an inner tray member that is detachably fitted inside the outer tray member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 3419295 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, the transport tray described in Patent Document 1 is configured so that the inner tray member abuts and fits against the outer tray member from the inside, requiring high dimensional accuracy during manufacturing. With this transport tray, if manufacturing errors occur due to shrinkage of the synthetic resin and a gap forms between the inner and outer tray members, the position of the inner tray member becomes unstable, making it difficult to remove the contents stored in the inner tray member using an automated machine, etc.

[0005] In view of the above circumstances, an object of the present disclosure is to propose a transport container that allows easy positioning of an inner container inside an outer container. [Means for solving the problem]

[0006] In order to solve the above problems, a transport container according to one aspect of the present disclosure includes an outer container having an internal storage space that is open upward, and an inner container placed in the storage space. The outer container has an outer bottom wall that forms the bottom of the outer container. The inner container has an inner bottom wall that forms the bottom of the inner container. The outer bottom wall and the inner bottom wall are provided with positioning portions that can engage with each other. [Effects of the Invention]

[0007] In the transport container of one aspect according to the present disclosure, it is easy to position the inner container inside the outer container. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing a transport container according to the first embodiment. [Figure 2] FIG. 2 is a perspective view showing the above-mentioned transport container with a lid. [Figure 3] FIG. 3 is a perspective view showing an outer container provided in the transportation container. [Figure 4] 4A is a plan view showing the outer container of the same, and FIG. 4B is a perspective view showing part A of FIG. 4A. [Figure 5] Figures 5A and 5B are cross-sectional views showing the positioning portions of the outer container and inner container provided in the above-mentioned transport container, where Figure 5A is a cross-sectional view of a portion corresponding to line BB in Figure 4A, and Figure 5B is a cross-sectional view of a portion corresponding to line CC in Figure 4A. [Figure 6] FIG. 6 is a perspective view showing the inner container of the same. [Figure 7] FIG. 7 is a bottom view showing the inner container of the same. [Figure 8] FIG. 8 is a perspective view showing a portion D in FIG. [Figure 9] 9A is a cross-sectional view taken along line EE in FIG. 8, and FIG. 9B is a cross-sectional view taken along line FF in FIG. [Figure 10]FIG. 10A is a plan view showing an outer container provided in a transport container of embodiment 2, and FIG. 10B is a perspective view showing part G in FIG. 10A. [Figure 11] 11A and 11B are cross-sectional views showing the positioning portions of the outer container and inner container provided in the above-mentioned transport container, where FIG. 11A is a cross-sectional view of a portion corresponding to line HH in FIG. 10A, and FIG. 11B is a cross-sectional view of a portion corresponding to line II in FIG. 10A. DETAILED DESCRIPTION OF THE INVENTION

[0009] (Embodiment 1) 1. Overview 1 and 5A includes an outer container 2 having an internal storage space S1 that is open upward, and an inner container 3 that is placed in the storage space S1. The outer container 2 has an outer bottom wall 20 that forms the bottom of the outer container 2. The inner container 3 has an inner bottom wall 30 that forms the bottom of the inner container 3. The outer bottom wall 20 and the inner bottom wall 30 are provided with positioning portions 5 that can engage with each other.

[0010] In the transport container 1 of embodiment 1 having the above configuration, even if there is a gap between the side surfaces of the outer container 2 and the inner container 3, the positioning portions 5 provided on the outer bottom wall 20 and the inner bottom wall 30 can engage with each other, making it easy to position the inner container 3 inside the outer container 2.

[0011] 2.Details Next, the transport container 1 of embodiment 1 shown in Figures 1 to 9 will be described in more detail with reference to the drawings. As shown in Figure 1, the transport container 1 of this embodiment comprises an outer container 2 having an upwardly open storage space S1 therein, and an inner container 3 placed in the storage space S1. As shown in Figure 2, the transport container 1 may further comprise a lid 4 that covers the inner container 3 from above. In this embodiment, the transport container 1 is a box that is rectangular in plan view.

[0012] In the following, each configuration will be described, with the longitudinal direction of the transport container 1 in a planar view being the front-to-back direction or first direction D1, the short side direction of the transport container 1 in a planar view being the left-to-right direction or second direction D2, and the height direction of the transport container 1 being the up-to-down direction.

[0013] 2-1. Outer packaging As shown in Fig. 3, the outer container 2 has an internal storage space S1 that is open upward. The outer container 2 is a resin molded product. The outer container 2 has an outer bottom wall 20 that forms the bottom of the outer container 2, and outer side walls 21 that rise from the outer periphery of the outer bottom wall 20. The space surrounded by the outer bottom wall 20 and the outer side walls 21 is the storage space S1 that is open upward. The outer container 2 is a resin molded product in which the outer bottom wall 20 and the outer side walls 21 are integrally molded.

[0014] 2-1-1. Bottom wall of exterior The exterior bottom wall 20 has a rectangular shape in a plan view. The exterior bottom wall 20 has a flat bottom wall main body 200 that forms the upper surface of the exterior bottom wall 20, and lattice-like ribs 201 that protrude from the lower surface of the bottom wall main body 200 (see FIGS. 9A and 9B). The ribs 201 are provided on the entire lower surface of the bottom wall main body 200 except for the outer periphery.

[0015] 3 , the exterior bottom wall 20 has a rectangular shape in a plan view and has a first end side 202 and a second end side 203 that are perpendicular to each other. The first end side 202 is the end side that extends in the longitudinal direction among the four end sides of the bottom wall main body portion 200, and the second end side 203 is the end side that extends in the lateral direction among the four end sides of the bottom wall main body portion 200. A first direction D1 along the first end side 202 is the longitudinal direction of the exterior bottom wall 20, and a second direction D2 along the second end side 203 is the lateral direction of the exterior bottom wall 20.

[0016] 3, 4A and 4B, and 5A and 5B, positioning portions 5 that can engage with each other are provided on the exterior bottom wall 20 and the interior bottom wall 30 that forms the bottom of the inner container 3. In this embodiment, the positioning portions 5 are uneven.

[0017] The positioning portion 5 is provided on one of the exterior bottom wall 20 and the interior bottom wall 30 and is composed of a protrusion 6 that protrudes toward the other of the exterior bottom wall 20 and the interior bottom wall 30, and a recess 7 that is provided on the other of the exterior bottom wall 20 and the interior bottom wall 30 and into which the protrusion 6 can be inserted. The protrusion 6 has a pair of inclined side surfaces that are spaced apart so that the distance between them becomes narrower toward the tip end in the protruding direction.

[0018] 4A and 4B, a protrusion 6 is provided on the exterior bottom wall 20. A part of the protrusion 6 is provided on the upper surface of the bottom wall main body 200 of the exterior bottom wall 20 above the rib 201, as shown in FIG.

[0019] As shown in FIG. 4A, the exterior bottom wall 20 is provided with a plurality of (four in this embodiment) protrusions 6. The plurality of protrusions 6 includes two first protrusions 6a and 6b spaced apart in a first direction D1 and two second protrusions 6c and 6d spaced apart in a second direction D2. The protrusions 6a, 6b, 6c, and 6d have the same shape. In this embodiment, as shown in FIG. 4B, each of the protrusions 6a, 6b, 6c, and 6d has a truncated quadrangular pyramid shape. Each of the protrusions 6a, 6b, 6c, and 6d has a rectangular shape in a plan view. The protrusions 6a, 6b, 6c, and 6d are arranged in a cross shape in a plan view. Each protrusion 6 has a pair of first side surfaces 60 and 61 facing one of the first direction D1 and the second direction D2, a pair of second side surfaces 62 and 63 facing the other direction, and a top surface 64. The top surface 64 has a rectangular shape in a plan view. In the two first protrusions 6a and 6b, the pair of first side surfaces 60 and 61 are surfaces facing the second direction D2, and the pair of second side surfaces 62 and 63 are surfaces facing the first direction D1.

[0020] In the two second protrusions 6c and 6d, the pair of first side surfaces 60 and 61 are surfaces facing the first direction D1, and the pair of second side surfaces 62 and 63 are surfaces facing the second direction D2.

[0021] The pair of first side surfaces 60, 61 and the pair of second side surfaces 62, 63 are inclined so that the distance between them becomes narrower toward the tip end (i.e., the upper portion) in the protruding direction. At the same height, the distance between the pair of first side surfaces 60, 61 is shorter than the distance between the pair of second side surfaces 62, 63. As shown in FIG. 5B, the length between the lower ends of the pair of first side surfaces 60, 61 of each protrusion 6 is slightly shorter than the length of the recess 7 in the direction in which the pair of first side surfaces 60, 61 are aligned. As shown in FIG. 5A, the length between the lower ends of the pair of second side surfaces 62, 63 of each protrusion 6 is shorter than the length of the recess 7 in the direction in which the pair of second side surfaces 62, 63 are aligned.

[0022] As shown in FIG. 4A , the two first protrusions 6a, 6b are spaced apart in the first direction D1 and are positioned at the same positions in the second direction D2. Therefore, the pair of first side surfaces 60, 61 of one first protrusion 6a and the pair of first side surfaces 60, 61 of the other first protrusion 6b are positioned at the same positions in the second direction D2. In the two first protrusions 6a, 6b, the length of the pair of first side surfaces 60, 61 in the first direction D1 is longer than the length of the pair of second side surfaces 62, 63 in the second direction D2. The two second protrusions 6c, 6d are spaced apart in the second direction D2 and are positioned at the same positions in the first direction D1. The pair of first side surfaces 60, 61 of one second protrusion 6c and the pair of first side surfaces 60, 61 of the other second protrusion 6d are positioned at the same positions in the first direction D1. In the two second protrusions 6c and 6d, the length of the pair of first side surfaces 60 and 61 in the second direction D2 is longer than the length of the pair of second side surfaces 62 and 63 in the first direction D1.

[0023] The two first protrusions 6a and 6b are located at the center in the second direction D2 of the exterior bottom wall 20. The two second protrusions 6c and 6d are located at the center in the first direction D1 of the exterior bottom wall 20.

[0024] The midpoint between the two first protrusions 6a and 6b is the center C1 of the exterior bottom wall 20 in the first direction D1 and the second direction D2. The midpoint between the two second protrusions 6c and 6d is the center C1 of the exterior bottom wall 20. The distance between the two first protrusions 6a and 6b is longer than the distance between the two second protrusions 6c and 6d.

[0025] In this embodiment, it is preferable that the four protrusions 6a, 6b, 6c, and 6d have the following positional relationship.

[0026] That is, when the distance from the center C1 of the exterior bottom wall 20 to the inner ends of the two first protrusions 6a, 6b in the first direction D1 is defined as distance L1, the distance in the first direction D1 from the outer ends of the two first protrusions 6a, 6b in the first direction D1 to the portion P1 of the exterior bottom wall 20 from which the short side wall portion 21b protrudes is defined as distance L2, the distance from the center C1 of the exterior bottom wall 20 to the inner ends of the two second protrusions 6c, 6d in the second direction D2 is defined as distance L3, and the distance in the second direction D2 from the outer ends of the two second protrusions 6c, 6d in the second direction D2 to the portion P2 of the exterior bottom wall 20 from which the long side wall portion 21a protrudes is defined as distance L4, it is preferable that distance L1 > distance L3 > distance L2 > distance L4 or distance L1 > distance L3 > distance L4 > distance L2.

[0027] 2-1-2.Exterior side wall 3, the exterior side walls 21 extend along the four edges of the exterior bottom wall 20. The exterior side walls 21 have a pair of long side wall portions 21a extending along the long edge (i.e., the first edge 202) of the exterior bottom wall 20, and a pair of short side wall portions 21b extending along the short edge (i.e., the second edge 203) of the exterior bottom wall 20. The pair of long side wall portions 21a and the pair of short side wall portions 21b are continuous to form a rectangular frame in a plan view.

[0028] Each of the pair of long side wall portions 21a and the pair of short side wall portions 21b has a rectangular, flat body portion 22 and a rib 23 that protrudes outward in the thickness direction from the body portion 22. The body portion 22 protrudes upward from a portion of the bottom wall body portion 200 that is slightly inside the outer periphery. The rib 23 is provided so that its tip in the protruding direction (i.e., outer end) is located on the outer periphery of the bottom wall body portion 200.

[0029] The ribs 23 include a plurality of horizontal ribs 24 extending in the horizontal direction and a plurality of vertical ribs 25 extending in the vertical direction and intersecting the horizontal ribs 24. Each of the horizontal ribs 24 is plate-shaped with a thickness in the up-down direction, and each of the vertical ribs 25 is plate-shaped with a thickness in the horizontal direction. In the long side wall portion 21a, the vertical ribs 25 have a thickness in the front-to-back direction, and in the short side wall portion 21b, the vertical ribs 25 have a thickness in the left-to-right direction. The lower ends of some of the vertical ribs 25 are connected to the outer periphery of the bottom wall main body portion 200 of the exterior bottom wall 20.

[0030] The exterior side wall 21 further has vertical ribs 26 that protrude outward from the corners formed by the long side wall portions 21a and the short side wall portions 21b. The exterior side wall 21 has four vertical ribs 26. The upper end of each vertical rib 26 is connected to the upper horizontal rib 24, and the lower end of each vertical rib 26 is connected to the outer periphery of the bottom wall main body portion 200 of the exterior bottom wall 20.

[0031] Next, the short side wall portion 21b will be described in more detail.

[0032] The multiple transverse ribs 24 are composed of two rows of transverse ribs 240, 241 provided at the upper end of the main body portion 22. The transverse rib 240 is provided at the upper end of the main body portion 22, and the transverse rib 241 is provided slightly below the upper end of the main body portion 22. The transverse rib 241 is positioned downward and spaced apart from the upper transverse rib 240 and is parallel to the upper transverse rib 240.

[0033] The multiple vertical ribs 25 are located toward the center of the main body 22 in the second direction D2 and include two vertical ribs 250, 251 that span across the two horizontal ribs 240, 241, and two vertical ribs 252, 253 that span across the upper horizontal rib 240 and the outer periphery of the bottom wall main body 200, outside the two vertical ribs 250, 251 in the second direction D2. The vertical ribs 252, 253 intersect with the horizontal ribs 241.

[0034] The short side wall portion 21b has a notch portion 27 that is cut downward from the upper end surface of the short side wall portion 21b and opens outward. In this embodiment, the notch portion 27 penetrates the short side wall portion 21b in the thickness direction and opens upward both to the outside and inside.

[0035] The cutout 27 is located at the center of the short side wall 21b in the second direction D2 (i.e., the left-right direction). In this embodiment, the vertical length of the cutout 27 is about one-sixth of the vertical length of the short side wall 21b.

[0036] A rectangular opening 220, as viewed in the first direction D1, is provided in the center of the upper end of the main body 22 in the second direction D2. Two vertical ribs 250, 251 protrude outward from both side edges of the opening 220 of the main body 22, and a horizontal rib 241 protrudes outward from the lower edge of the opening 220 of the main body 22. Although the portion of the main body 22 where the opening 220 is provided would normally have reduced strength against a load from inside the outer container 2, the strength is ensured because the ribs 250, 251, 241 protrude from the periphery of the opening 220 and reinforce it.

[0037] The space surrounded by the two vertical ribs 250, 251 and the one horizontal rib 241 and the opening 220 constitutes the cutout portion 27. The bottom surface of the cutout portion 27 is formed by the lower edge surface of the opening 220 of the main body portion 22 and the upper surface of the horizontal rib 241.

[0038] A protrusion 2410 that protrudes downward is provided on the underside of the horizontal rib 241, and the horizontal rib 241 and the protrusion 2410 form a handle.

[0039] The protrusion 2410 is plate-shaped and protrudes downward from the outer end of the horizontal rib 241. The protrusion 2410 is longer in the left-right direction than the notch 27. The protrusion 2410 is provided so as to span the two vertical ribs 252, 253.

[0040] The protrusion 2410 is located along the main body 22 and spaced apart from the main body 22. Two reinforcing ribs 28 are provided on the inside of the protrusion 2410, and the protrusion 2410 is connected to the main body 22 via the two reinforcing ribs 28.

[0041] The two reinforcing ribs 28 are positioned more inward in the second direction D2 than the two vertical ribs 250, 251. The space between the two reinforcing ribs 28 forms an insertion space S2 into which a user's fingers can be inserted.

[0042] 2-2.Inner packaging 1 has a container body 34 (an interior bottom wall 30 and an interior side wall 31, which will be described later) that is placed in the storage space S1 of the outer container 2, and a flange 32 that protrudes outward from the upper end of the container body 34. The inner container 3 has an internal storage space S3 that is open upward. The inner container 3 is a resin-molded product in which the interior bottom wall 30 and the interior side wall 31 are integrally molded.

[0043] 6, the inner container 3 has an inner bottom wall 30 that forms the bottom of the inner container 3, an inner side wall 31 that rises from the outer periphery of the inner bottom wall 30, and a flange 32 that protrudes outward from the upper peripheral edge of the inner side wall 31. The space surrounded by the inner bottom wall 30 and the inner side wall 31 is an inner storage space S3 that is open upward.

[0044] The interior bottom wall 30 has a rectangular shape in a plan view. As shown in Figures 6 and 7, the interior bottom wall 30 has a flat bottom wall main body 300 that forms the upper surface of the interior bottom wall 30, and lattice-like ribs 301 that protrude from the lower surface of the bottom wall main body 300. The ribs 301 are provided over the entire lower surface of the bottom wall main body 300.

[0045] The lattice-shaped ribs 301 are made up of a plurality of ribs 301a extending linearly in the first direction D1 and a plurality of ribs 301b extending linearly in the second direction D2 and intersecting with the plurality of ribs 301a. Each of the plurality of ribs 301a extends from one end to the other end of the interior bottom wall 30 in the first direction D1. Each of the plurality of ribs 301b extends from one end to the other end of the interior bottom wall 30 in the second direction D2. The lattice-shaped ribs 301 form a large number of recesses 302 that open downward.

[0046] The lower surface of the interior bottom wall 30 is provided with multiple (four in this embodiment) recesses 7 into which multiple protrusions 6 provided on the upper surface of the exterior bottom wall 20 are inserted. Each recess 7 is formed by providing some of the multiple ribs 301a, 301b, among the multiple ribs 301a, 301b, discontinuously in a portion of their longitudinal direction. Each recess 7 is surrounded by two ribs 301a aligned in the first direction D1 and two ribs 301b aligned in the second direction D2, forming a rectangular recess when viewed from below. As shown in FIGS. 5A and 5B, the two ribs 301a are shorter in the second direction D2 toward their distal ends, and the two ribs 301b are shorter in the first direction D1 toward their distal ends. As shown in FIG. 7, each recess 7 is longer in both the first direction D1 and the second direction D2 than each of the multiple recesses 302 surrounding it.

[0047] The recesses 7 include two first recesses 7a and 7b spaced apart in a first direction D1 and two second recesses 7c and 7d spaced apart in a second direction D2. The recesses 7a, 7b, 7c, and 7d have the same shape.

[0048] The two first recesses 7a, 7b are located apart in the first direction D1 and are at the same position in the second direction D2. Each of the two first recesses 7a, 7b is located in the center of the interior bottom wall 30 in the second direction D2. The midpoint between the two first recesses 7a, 7b is the center of the interior bottom wall 30 in the first direction D1 and the second direction D2. The length of each of the two first recesses 7a, 7b in the first direction D1 is longer than the length of each of the two first recesses 7a, 7b in the second direction D2.

[0049] The two second recesses 7c, 7d are spaced apart in the second direction D2 and are at the same position in the first direction D1. Each of the two second recesses 7c, 7d is located in the center of the interior bottom wall 30 in the first direction D1. The midpoint between the two second recesses 7c, 7d is the center of the interior bottom wall 30 in the first direction D1 and the second direction D2. The length of each of the two second recesses 7c, 7d in the second direction D2 is longer than its length in the first direction D1. The distance between the two first recesses 7a, 7b is longer than the distance between the two second recesses 7c, 7d.

[0050] As shown in Fig. 6, the interior side walls 31 extend along the four edges of the interior bottom wall 30, which is rectangular in plan view. The interior side walls 31 have a pair of long side wall portions 31a extending along the long edges of the interior bottom wall 30, and a pair of short side wall portions 31b extending along the short edges of the interior bottom wall 30. The pair of long side wall portions 31a and the pair of short side wall portions 31b are continuous in the shape of a rectangular frame in plan view. Each of the pair of long side wall portions 31a and the pair of short side wall portions 31b is flat.

[0051] In this embodiment, the flange 32 protrudes outward from the upper peripheral edge of the interior side wall 31 along the entire periphery and has a rectangular frame shape in plan view. The flange 32 has a pair of long-side flange portions 32a protruding outward in the second direction D2 (i.e., outward in the left-right direction) from the upper ends of the pair of long-side wall portions 31a, and a pair of short-side flange portions 32b protruding outward in the first direction D1 (i.e., outward in the front-rear direction) from the upper ends of the pair of short-side wall portions 31b. The pair of long-side flange portions 32a and the pair of short-side flange portions 32b are continuous to form a rectangular frame shape in plan view.

[0052] The pair of longitudinal flange portions 32a and the pair of lateral flange portions 32b are each plate-shaped with the thickness direction extending in the up-down direction. The pair of longitudinal flange portions 32a and the pair of lateral flange portions 32b are provided so as to rest on the upper end surface of the exterior side wall 21 (i.e., the upper surface of the upper end horizontal rib 240) over their entire circumferential length.

[0053] As shown in Fig. 7, a finger hook 320 is provided on the underside of the pair of short-side flanges 32b in a central portion in the second direction D2 located above the notch 27, protruding downward as a handle. In this embodiment, the finger hook 320 is provided at the tip end (i.e., the outer end) of the short-side flanges 32b in the protruding direction, and includes a rib 321 extending linearly in the second direction D2 and two ribs 322 extending linearly in the first direction D1 to connect both ends of the rib 321 in the second direction D2 to the short-side wall 31b. The distance between the two ribs 322 is slightly shorter than the length of the notch 27 in the second direction D2. When the inner container 3 is placed in the storage space S1 of the outer container 2, the two ribs 322 are positioned adjacent to the two vertical ribs 250, 251. The distance between the two ribs 322 may be longer than the length of the cutout portion 27 in the second direction D2.

[0054] In this way, the portion of the pair of short-side flanges 32b located above the notch 27 is reinforced by being thicker than the surrounding portion by providing the ribs 321, 322. Note that the portion of the pair of short-side flanges 32b located above the notch 27 may not be provided with the ribs 321, 322, and the entire portion may be thicker than the surrounding portion.

[0055] In this embodiment, with the flange 32 of the inner container 3 placed on the horizontal rib 24 at the upper end of the outer container 2, the outer container 2 and the inner container 3 preferably have the following positional relationship in the first direction D1.

[0056] That is, as shown in FIG. 9A, when the distance in the first direction D1 between the short side wall portion 21b of the outer container 2 and the short side wall portion 31b of the inner container 3 is distance L5, and as shown in FIG. 5B, the distance in the first direction D1 from the upper ends of the first side surfaces 60, 61 of the second convex portions 6c, 6d of the outer container 2 to the side surface of the rib 301b of the corresponding concave portion 7 of the inner container 3 is distance L6, it is preferable that distance L6 ≧ distance L5.

[0057] In this case, even if the inner container 3 is displaced to the maximum extent in the first direction D1 inside the outer container 2, the ribs 301b of the inner container 3 rest on the inclined first side surfaces 60, 61 of the second convex portions 6c, 6d, and therefore the inner container 3 can be guided to an appropriate position inside the outer container 2.

[0058] It is preferable that the outer container 2 and the inner container 3 have the same positional relationship in the second direction D2.

[0059] 2-3. Lid The lid 4 shown in Fig. 2 is configured to cover the inner container 3 from above. The lid 4 is a resin molded product. The lid 4 has a lid main body 40 that is arranged above the internal storage space S3 of the inner container 3, and a lid outer periphery 41 that is arranged above the protruding portion 33 of the inner container 3. As shown in Figs. 9A and 9B, the lid 4 further has a restricting portion 42 that protrudes downward from the outer periphery of the lid main body 40.

[0060] As shown in Fig. 2, the lid main body 40 has a rectangular flat plate shape in a plan view. The lid outer peripheral portion 41 extends outward from the outer peripheral edge of the lid main body 40 and has a rectangular frame shape in a plan view. In this embodiment, the lid outer peripheral portion 41 protrudes upward beyond the lid main body 40. The lid outer peripheral portion 41 is placed on the flange 32 of the inner container 3.

[0061] The lid outer peripheral portion 41 includes a pair of long-side frame portions 41a along the long-side edges of the lid main body portion 40 and a pair of short-side frame portions 41b along the short-side edges of the lid main body portion 40. In this embodiment, the lid outer peripheral portion 41 has a hollow structure. As shown in FIG. 9B, each of the pair of short-side frame portions 41b is provided with a plurality of recesses 411 that open downward. The plurality of recesses 411 are positioned side by side in the second direction D2. As shown in FIG. 2, each of the pair of long-side frame portions 41a is provided with a plurality of recesses 410 that open outward in the second direction D2. The plurality of recesses 410 are positioned side by side in the first direction D1.

[0062] 9A and 9B is provided around the entire outer periphery of the lid main body 40. The restricting portion 42 has a rectangular frame shape when viewed from below. The restricting portion 42 is provided to be slightly smaller than the inner side wall 31. The restricting portion 42 restricts the lid 4 from slipping off the inner container 3.

[0063] When the lid 4 is placed on the outer container 2 and the inner container 3 so that the center of the lid 4 in a plan view is located directly above the centers of the outer container 2 and the inner container 3 in a plan view, the outer peripheral edge of the lid outer peripheral portion 41 (the lower end of the outer surface of the lid outer peripheral portion 41 in FIG. 9A) is located directly above or further inward (toward the front in FIG. 9A) than the outer peripheral edge of the outer container 2 (the tips of the horizontal ribs 241 in FIG. 9A). The protrusions 2410 of the handle are located further inward than the outer peripheral edge of the outer container 2 (the tips of the horizontal ribs 241 in FIG. 9A).

[0064] As a result, in the transport container 1 of this embodiment, when two transport containers 1 are lined up in the front-to-back direction, the outer containers 2 are butted against each other, preventing dead space from being created between the outer containers 2, and when one transport container 1 is lifted, it is possible to prevent the lid 4 of the other transport container 1 from getting caught on it and lifting up.

[0065] Furthermore, in the transport container 1 of this embodiment, the outer peripheral edge of the lid outer peripheral portion 41 does not easily protrude outward beyond the outer peripheral edge of the outer container 2, making it easy to hold the outer peripheral portion of the lid 4 with the palm of the hand while hooking the fingers on the protrusions 2410 of the handle, making it easy to carry the transport container 1 with the lid 4 attached. Here, if the outer peripheral edge of the lid 4 (i.e., the outer peripheral edge of the lid outer peripheral portion 41) protrudes outward beyond the outer peripheral edge of the outer container 2, the palm of the hand is likely to hurt when lifting the transport container 1, starting from the part where the palm hits the outer peripheral edge of the lid 4. However, in the transport container 1 of this embodiment, the outer peripheral edge of the lid 4 does not protrude outward beyond the outer peripheral edge of the outer container 2, so the palm is less likely to hurt when lifting the transport container 1.

[0066] In this embodiment, the inner container 3, outer container 2, and lid 4 are configured such that the thicknesses of the plate-shaped main portions constituting each component decrease in the order of inner container 3, outer container 2, and lid 4. Specifically, the bottom wall main body portion 300, inner side wall 31, and flange 32 of the inner container 3 are thicker than the bottom wall main body portion 200 of the outer container 2 and the main body portion 22 of the outer side wall 21. The bottom wall main body portion 200 of the outer container 2 and the main body portion 22 of the outer side wall 21 are thicker than the lid main body portion 40 of the lid 4. Therefore, the inner container 3 has sufficient strength to be used alone. Furthermore, the outer container 2 is thinner than the inner container 3 but thicker than the lid 4, which facilitates weight reduction while maintaining sufficient strength to support a load. When the outer container 2 is used together with the inner container 3, the weight can be reduced.

[0067] The inner container 3, outer container 2, and lid 4 may be provided such that the thickness of the plate-like main portion constituting each part decreases in the order of outer container 2, inner container 3, and lid 4.

[0068] 3. Effects In the transport container 1 of this embodiment described above, when the inner container 3 is placed inside the outer container 2, the four convex portions 6 protruding upward from the outer bottom wall 20 can be positioned at predetermined positions within the four concave portions 7 on the underside of the inner bottom wall 30 (see Figures 5A and 5B).

[0069] At this time, if the insertion position of the inner container 3 is slightly deviated from the predetermined position in the first direction D1, one of the two ribs 301b, 301b constituting the two first recesses 7a, 7b will abut one of the two second side surfaces 62, 63 of the two first protrusions 6a, 6b. Alternatively, one of the two ribs 301b, 301b constituting the two second recesses 7c, 7d will abut one of the two first side surfaces 60, 61 of the two second protrusions 6c, 6d. As a result, the inner container 3 moves in the first direction D1 while abutting against the inclined side surfaces of the protrusions 6, and the inner container 3 is guided to an appropriate position in the first direction D1.

[0070] Furthermore, at this time, if the insertion position of the inner container 3 is deviated from the predetermined position in the second direction D2, one of the two ribs 301a, 301a constituting the two first recesses 7a, 7b will abut one of the two first side surfaces 60, 61 of the two first protrusions 6a, 6b. Alternatively, one of the two ribs 301a, 301a constituting the two second recesses 7c, 7d will abut one of the two second side surfaces 62, 63 of the two second protrusions 6c, 6d. As a result, the inner container 3 moves in the second direction D2 while abutting against the inclined side surfaces of the protrusions 6, and the inner container 3 is guided to an appropriate position in the second direction D2.

[0071] In this way, the inner container 3 is guided in the first direction D1 and the second direction D2 by each of the protrusions 6, allowing the inner container 3 to be placed at a predetermined position inside the outer container 2. When in the predetermined position, the entire circumference of the flange 32 of the inner container 3 rests on the horizontal rib 24 at the upper end of the outer container 2. When in the predetermined position, a gap is created between the interior side wall 31 of the inner container 3 and the exterior side wall 21 of the outer container 2 (see Figures 9A and 9B).

[0072] In the transportation container 1 of this embodiment, when the inner container 3 is displaced from a predetermined position in the outer container 2 in the first direction D1 or the second direction D2, the convex portion 6 and the concave portion 7 engage with each other.

[0073] In detail, when the inner container 3 shifts from the predetermined position in the first direction D1, one of the two first side surfaces 60, 61 of the two second protrusions 6c, 6d comes into contact with one of the two ribs 301b, 301b that form the two second recesses 7c, 7d, thereby regulating the positional shift.

[0074] Furthermore, when the inner container 3 shifts from the predetermined position in the second direction D2, one of the two first side surfaces 60, 61 of the two first convex portions 6a, 6b comes into contact with one of the two ribs 301a, 301a that form the two first concave portions 7a, 7b, thereby regulating the positional shift.

[0075] In this way, the multiple convex portions 6 and the multiple concave portions 7 engage with each other, thereby restricting positional deviation of the inner container 3 in each of the first direction D1 and the second direction D2, and therefore, in the transport container 1 of this embodiment, it is easy to position the inner container 3.

[0076] Furthermore, in the transport container 1 of this embodiment, when the inner container 3 shifts from a predetermined position in the first direction D1, the positional shift can be restricted by the two second convex portions 6c, 6d that are located at the same positions in the first direction D1, and therefore rotational movement of the inner container 3 around the vertical axis can also be restricted.

[0077] Furthermore, in the transport container 1 of this embodiment, when the inner container 3 shifts from a predetermined position in the second direction D2, the positional shift can be restricted by the two first convex portions 6a, 6b, which are located at the same positions in the second direction D2, and therefore, rotational movement of the inner container 3 around the vertical axis can also be restricted.

[0078] In this way, each of the protrusions 6 can regulate displacement of the inner container 3 in each direction, making it easy to maintain the inner container 3 at a predetermined position within the outer container 2.

[0079] Therefore, in the transport container 1 of this embodiment, even if there is a gap between the side surfaces of the outer container 2 and the inner container 3, the positioning portions 5 (protrusions 6 and recesses 7) provided on the outer bottom wall 20 and the inner bottom wall 30 can engage with each other, making it easy to position the inner container 3 inside the outer container 2. Therefore, in the transport container 1 of this embodiment, it is easy to position the contents stored in the inner container 3, and the contents can be easily removed by an automated machine.

[0080] Furthermore, in the transportation container 1 of this embodiment, the inner container 3 can be easily maintained in a predetermined position within the outer container 2, and as shown in FIG. 9A, the protrusion 33 (more specifically, the flange 32) of the inner container 3 can be easily positioned above the bottom surface of the cutout portion 27.

[0081] Therefore, a user can easily remove the inner container 3 from the outer container 2 by inserting a finger from the outside of the container between the bottom surface of the notch 27 and the protruding portion 33 and lifting it up. Note that the protruding portion 33 can be lifted not only by the user's hand but also by an automatic machine.

[0082] 5A and 5B, in the transport container 1 of this embodiment, the multiple protrusions 6 provided on the upper surface of the exterior bottom wall 20 of the exterior container 2 can be contained within the thickness of the interior bottom wall 30 of the inner container 3, making it possible to provide a flat upper surface for the interior bottom wall 30. Therefore, in the transport container 1 of this embodiment, the multiple protrusions 6 make it easy to position the inner container 3, and it is possible to prevent interference between the multiple protrusions 6 and the contents contained in the transport container 1.

[0083] 5B, in the transport container 1 of this embodiment, the convex portion 6 is positioned within the concave portion 7 with a horizontal gap therebetween. Therefore, in the transport container 1 of this embodiment, the requirement for high dimensional accuracy during manufacturing can be avoided compared to when the convex portion 6 is provided to fit into the concave portion 7.

[0084] (Embodiment 2) Next, the transport container 1 of embodiment 2 shown in Figures 10A and 10B and 11A and 11B will be described in detail with reference to the drawings. In the following, the components of the transport container 1 of embodiment 2 that are common to embodiment 1 will be given the same reference numerals in the drawings and detailed description will be omitted, and components that differ from embodiment 1 will be described in detail.

[0085] In the transportation container 1 of this embodiment, the structure of the protrusions 6 is different from that of the protrusions 6 of the first embodiment.

[0086] 10A and 10B, each of the protrusions 6a, 6b, 6c, and 6d has a notch 68 that is open upward and on one side in the first direction D1 or one side in the second direction D2 so as to form a U-shape in a plan view. The notch 68 of each of the protrusions 6a, 6b, 6c, and 6d opens toward the center of the exterior bottom wall 20 in the first direction D1 and the second direction D2.

[0087] As shown in FIG. 10B , the protrusion 6 has a pair of first side surfaces 60, 61, a pair of second side surfaces 62, 63, and a top surface 64. The protrusion 6 also has a pair of third side surfaces 65, 66 facing the opposite side from the first side surfaces 60, 61, and a fourth side surface 67 facing the opposite side from the second side surface 62, as surfaces facing the cutout 68. The first side surfaces 60, 61 have inclined surfaces 600, 610 located at the upper part and upright surfaces 601, 611 located at the lower part. The inclined surfaces 600, 610 are inclined so that the spacing between them becomes narrower toward the tip end (i.e., the upper part) in the protruding direction. The upright surfaces 601, 611 are continuous with the lower ends of the inclined surfaces 600, 610. The angle of the upright surfaces 601, 611 with respect to the upper surface of the exterior bottom wall 20 is slightly greater than 90 degrees. The angles formed by the upright surfaces 601, 611 and the inclined surfaces 600, 610 are approximately 150 degrees. The second side surface 63 has two portions 630, 631 positioned on either side of the notch 68. The top surface 64 is U-shaped in plan view.

[0088] As shown in FIG. 11B, the length between the upright surfaces 601, 611 of the pair of first side surfaces 60, 61 of each protrusion 6 is slightly shorter than the length of the recess 7 on the lower surface of the interior bottom wall 30 in the direction in which the pair of first side surfaces 60, 61 are aligned.

[0089] A distance L7 between the upright surfaces 601, 611 and the side surfaces of the ribs 301b facing the upright surfaces 601, 611 (i.e., the inner side surfaces of the recesses 7) is shorter than a distance L5 (see FIG. 9A) in the first direction D1 between the short side wall portions 21b of the outer container 2 and the short side wall portions 31b of the inner container 3. In addition, the distance L7 is shorter than the radius of the arc (see FIG. 9A) formed by the upper surface of the exterior bottom wall 20 of the outer container 2 and the inner surface of the exterior side wall 21.

[0090] 11A and 11B, each of the protrusions 6c and 6d is arranged so that the notch 68 is located directly above one of the ribs 201a extending in the second direction D2 that constitutes the lattice-shaped rib 201. Similarly, each of the protrusions 6a and 6b is arranged so that the notch 68 is located directly above one of the ribs extending in the first direction D1 that constitutes the lattice-shaped rib 201.

[0091] In the transport container 1 of this embodiment described above, the inclined surfaces 600, 610 are provided at the top of the first side surfaces 60, 61 of each convex portion 6, which makes it easier for each convex portion 6 to be inserted into each recessed portion 7 when inserting the inner container 3 into the outer container 2, facilitating the positioning of the outer container 2 and the inner container 3. Furthermore, in the transport container 1 of this embodiment, the upright surfaces 601, 611 are provided at the bottom of the first side surfaces 60, 61 of each convex portion 6, which makes it easier to restrict horizontal movement of the recessed portion 7 relative to the convex portion 6 after insertion, making it easier to prevent misalignment between the outer container 2 and the inner container 3.

[0092] Furthermore, in the transport container 1 of this embodiment, the protrusions 6 are U-shaped in plan view, so impurities such as water and dust are less likely to remain inside the protrusions 6 when the outer container 2 is washed. Furthermore, in the transport container 1 of this embodiment, the protrusions 6 are U-shaped in plan view, so the amount of resin required to mold the protrusions 6 can be reduced compared to when the protrusions 6 are in the shape of a truncated square pyramid. Furthermore, in the transport container 1 of this embodiment, a rib extending in the same direction as the opening direction of the notch 68 is located directly below the notch 68 of the protrusion 6, so sink marks are less likely to occur during injection molding.

[0093] (Variation) Next, a description will be given of modified examples of the transportation container 1 of the above-described Embodiments 1 and 2. The modified examples described below can be combined as appropriate.

[0094] The positioning portions 5 (i.e., the protrusions 6 and recesses 7) provided on the exterior bottom wall 20 and the interior bottom wall 30 may be any as long as they are engageable with each other, and are not limited to the structures shown in Figures 4A, B, 5A, B, 10A, B, 11A, B, etc. For example, the recesses 7 may be provided on the upper surface of the exterior bottom wall 20, and the protrusions 6 may be provided on the lower surface of the interior bottom wall 30.

[0095] Furthermore, the shape of the protrusions 6 in the first embodiment is not limited to the truncated quadrangular pyramid shape shown in Fig. 4B, and may be other shapes. For example, the protrusions 6 may be provided with a recess that divides the protrusions 6 into two in the first direction D1 or the second direction D2.

[0096] 11A, 11B, etc. For example, the second side surfaces 62, 63 may have upright surfaces at the bottom. In this case, it is preferable that the length of the recess 7 in which the protrusion 6 is accommodated, in the direction in which the second side surfaces 62, 63 are aligned, is approximately the same as the distance between the upright surfaces of the second side surfaces 62, 63. The protrusion 6 does not need to have the notch 68. The protrusion 6 may also have a recess that divides the protrusion 6 into two in the first direction D1 or the second direction D2.

[0097] Moreover, the interior bottom wall 30 does not have to have the rib 301, and the recess 7 may be provided by recessing a part of the lower surface of the bottom wall main body 300.

[0098] Furthermore, the exterior bottom wall 20 may not have the ribs 201, and the entire protrusion 6 may be provided on the portion of the upper surface of the bottom wall main body 200 where the ribs 201 are not provided.

[0099] Furthermore, the number and arrangement of the protrusions 6 provided on the exterior bottom wall 20 are not limited to the number and arrangement shown in FIG. 4A.

[0100] The two first protrusions 6a and 6b may be offset from each other in the second direction D2, and the two second protrusions 6c and 6d may be offset from each other in the first direction D1.

[0101] 5A, 5B, etc. The positioning portion 5 (i.e., the protrusion 6 and the recess 7) need only be engageable with each other, and is not limited to the shapes shown in Figures 5A and 5B, etc. The protrusion 6 does not need to have a pair of side surfaces (a pair of first side surfaces 60, 61 or a pair of second side surfaces 62, 63, or both) that are inclined so that the distance between them becomes narrower toward the tip end in the protruding direction.

[0102] The outer container 2 and the inner container 3 are not limited to the structures shown in Figures 2, 5, etc. For example, the outer container 2 does not have to have the cutout portion 27. Furthermore, the inner container 3 does not have to have the flange 32. Furthermore, the planar shapes of the outer container 2 and the inner container 3 are not limited to rectangular shapes and may be other shapes.

[0103] Furthermore, the outer container 2, inner container 3 and lid 4 are not limited to being resin molded products, and may be made of other materials such as metal.

[0104] Furthermore, the outer container 2 is not limited to a resin molded product in which the outer bottom wall 20 and the outer side wall 21 are integrally molded, but may also be an assembled container formed by assembling the outer bottom wall 20 and the outer side wall 21, or may be a foldable container.

[0105] Furthermore, the vertical ribs 250, 251 of the outer container 2 may be inclined so that the lower portions thereof are positioned more inward in the second direction D2 (i.e., closer to the cutout 27). At least one of the outer surfaces of the short side wall portions 31b and the underside of the short side flange portions 32b of the inner container 3 may be provided around the finger hook portion 320 with ribs that come into contact with the vertical ribs 250, 251 when the inner container 3 is inserted into the outer container 2 with a misalignment in the second direction D2. In this case, when the inner container 3 is inserted into the outer container 2, the ribs come into contact with the vertical ribs 250, 251, thereby guiding the inner container 3 to an appropriate position within the outer container 2. Note that the outer container 2 may be provided with pairs of vertical ribs 250, 251 inclined toward the cutout 27 in four directions (i.e., on both the pair of long side wall portions 21a and the pair of short side wall portions 21b), and similarly, the inner container 3 may be provided with ribs that are guided by the vertical ribs 250, 251 in four directions. In this case, when inserting the inner container 3 into the outer container 2, even if the inner container 3 shifts in either the first direction D1 or the second direction D2, the inner container 3 can be guided to an appropriate position within the outer container 2.

[0106] Furthermore, the lid 4 may be formed so that even when the central portion of the lid 4 in a plan view is shifted from directly above the central portions of the outer container 2 and the inner container 3 in a plan view, the outer peripheral edge of the lid 4 is positioned directly above or further inward than the outer peripheral edge of the outer container 2.

[0107] (summary) As in the first and second embodiments and their modifications described above, the transport container 1 of the first aspect has the following configuration.

[0108] That is, the transport container 1 of the first embodiment comprises an outer container 2 having an internal storage space S1 that is open upward, and an inner container 3 that is placed in the storage space S1. The outer container 2 has an outer bottom wall 20 that forms the bottom of the outer container 2. The inner container 3 has an inner bottom wall 30 that forms the bottom of the inner container 3. The outer bottom wall 20 and the inner bottom wall 30 are provided with positioning portions 5 that can engage with each other.

[0109] In the transport container 1 of the first embodiment having the above configuration, even if there is a gap between the side surfaces of the outer container 2 and the inner container 3, the positioning portions 5 provided on the outer bottom wall 20 and the inner bottom wall 30 can engage with each other, making it easy to position the inner container 3 inside the outer container 2.

[0110] Furthermore, like the above-described first and second embodiments and their modifications, the transport container 1 of the second aspect additionally comprises the following configuration in addition to the configuration of the first aspect.

[0111] That is, in the transport container 1 of the second embodiment, the positioning portion 5 is provided on one of the exterior bottom wall 20 and the interior bottom wall 30 and is composed of a protrusion 6 that protrudes toward the other of the exterior bottom wall 20 and the interior bottom wall 30, and a recess 7 that is provided on the other of the exterior bottom wall 20 and the interior bottom wall 30 and into which the protrusion 6 can be inserted. The protrusion 6 has a pair of side surfaces (first side surfaces 60, 61 or second side surfaces 62, 63) that are inclined so that the distance between them becomes narrower toward the tip end in the protruding direction.

[0112] In the transport container 1 of the second embodiment having the above configuration, when the protrusion 6 is inserted into the recess 7, one of the pair of side surfaces of the protrusion 6 comes into contact with the inner surface of the recess 7, thereby guiding the protrusion 6 to an appropriate position within the recess 7. Therefore, in the transport container 1 of the second embodiment, the protrusion 6 can be easily guided into the recess 7.

[0113] Furthermore, like the above-described first and second embodiments and their modifications, the transport container 1 of the third aspect additionally comprises the following configuration in addition to the configuration of the second aspect.

[0114] That is, in the transport container 1 of the third embodiment, the exterior bottom wall 20 has a flat bottom wall main body 200 that forms the upper surface of the exterior bottom wall 20, and a rib 201 that protrudes downward from the bottom wall main body 200. A part of the protrusion 6 is provided on the upper surface of the bottom wall main body 200, above the rib 201.

[0115] In the third embodiment of the transport container 1 having the above-mentioned configuration, by providing a portion of the convex portion 6 on the upper surface of the bottom wall main body portion 200 above the rib 201, it is possible to make it less likely for sink marks to occur on the surface (upper or lower surface) of the bottom wall main body portion 200.

[0116] Furthermore, like the above-described first and second embodiments and their modifications, the transport container 1 of the fourth aspect additionally comprises the following configuration in addition to the configuration of the second aspect.

[0117] That is, in the transportation container 1 of the fourth embodiment, the exterior bottom wall 20 is rectangular in plan view and has a first end edge 202 and a second end edge 203 that are perpendicular to each other. The exterior bottom wall 20 is provided with a plurality of protrusions 6. The plurality of protrusions 6 includes two first protrusions 6a, 6b spaced apart in a first direction D1 along the first end edge 202, and two second protrusions 6c, 6d spaced apart in a second direction D2 along the second end edge 203.

[0118] In the transportation container 1 of the fourth embodiment having the above-mentioned configuration, the four protrusions 6a, 6b, 6c, and 6d make it easy to prevent the inner container 3 from shifting in position between the first direction D1 and the second direction D2.

[0119] Furthermore, like the above-described first and second embodiments and their modifications, the transportation container 1 of the fifth aspect additionally comprises the following configuration in addition to the configuration of the fourth aspect.

[0120] That is, in the transportation container 1 of the fifth embodiment, each of the two first protrusions 6a, 6b has a pair of side surfaces (first side surfaces 60, 61) aligned in the second direction D2, and each of the two second protrusions 6c, 6d has a pair of side surfaces (first side surfaces 60, 61) aligned in the first direction D1.

[0121] In the transport container 1 of the fifth embodiment having the above configuration, when the inner container 3 is placed into the outer container 2, the pair of side surfaces (first side surfaces 60, 61) of the two first protrusions 6a, 6b in the second direction D2 guide the inner container 3 in the second direction D2. At this time, the pair of side surfaces (first side surfaces 60, 61) of the two second protrusions 6c, 6d in the first direction D1 guide the inner container 3 in the first direction D1. Therefore, in the transport container 1 of the fifth embodiment, the inner container 3 can be easily placed in an appropriate position within the outer container 2.

[0122] The present disclosure has been described above based on the embodiments shown in the accompanying drawings, but the present disclosure is not limited to the above embodiments, and appropriate design changes are possible within the intended scope of the present disclosure. [Explanation of symbols]

[0123] 1. Transport container 2 Outer packaging 20 Exterior bottom wall 200 Bottom wall main body 201 Rib 202 First edge 203 Second edge 3 Inner packaging 30 Interior bottom wall 5 Positioning part 6 Convex part 6a First convex part 6b First convex part 6c Second convex part 6d Second convex part 7. Recess D1 First direction D2 Second direction S1 Storage Space

Claims

1. an outer container having an internal storage space that is open upward; an inner container disposed in the storage space, the outer container has an outer bottom wall that forms a bottom portion of the outer container, the inner container has an inner bottom wall that forms a bottom portion of the inner container, The exterior bottom wall and the interior bottom wall are provided with positioning portions that can be engaged with each other. Transport container.

2. The positioning unit is a protrusion provided on one of the exterior bottom wall and the interior bottom wall and protruding toward the other of the exterior bottom wall and the interior bottom wall; a recess provided on the other side into which the protrusion can be inserted, The protrusion has a pair of inclined side surfaces such that the distance between them becomes narrower toward the tip end in the protruding direction.

2. The shipping container of claim 1.

3. The exterior bottom wall is a flat plate-shaped main body portion that forms an upper surface of the exterior bottom wall; a rib protruding downward from the main body portion, A part of the convex portion is The rib is provided on the upper surface of the main body.

3. The shipping container of claim 2.

4. the exterior bottom wall has a rectangular shape in a plan view and has a first end side and a second end side that are perpendicular to each other, The exterior bottom wall is provided with a plurality of the protrusions, The plurality of protrusions include two first protrusions spaced apart in a first direction along the first end side; two second protrusions spaced apart in a second direction along the second end side, 3. The shipping container of claim 2.

5. each of the two first protrusions has the pair of side surfaces aligned in the second direction; Each of the two second protrusions has the pair of side surfaces aligned in the first direction.

5. The transport container of claim 4.

Images