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 goods, etc. [Background technology]

[0002] Conventionally, as a container used for transporting goods, there has been known a container that includes a bottom wall component having a substantially rectangular bottom wall and bases that protrude upward along each side edge of the bottom wall, and side wall components that are rotatably connected to each base, and that can be assembled into a box shape that opens upward and that can be folded by tilting each side wall component above the bottom wall. There is also a technology in which each side wall component and the bottom wall component have a hollow structure and a heat insulating member is provided in the internal space to improve cold and warm insulation properties (see, for example, Patent Document 1, etc.). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-332037 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, there are cases where the container is folded and a lid is placed on top of it.

[0005] An object of the present invention is to provide a container that can stabilize the state in which a lid is placed over a container body in a folded state. [Means for solving the problem]

[0006] The following describes each means suitable for achieving the above objects, etc., by item. Note that, as necessary, the effects and advantages specific to the corresponding means will be added.

[0007] Means 1. A bottom wall component including a bottom wall portion having a generally rectangular shape in a plan view and a base portion protruding upward along a side edge portion of the bottom wall portion; The bottom wall portion has a side wall portion connected to the base portion of the bottom wall portion so as to be rotatable between an upright position in which the side wall portion is erected above each side edge portion of the bottom wall portion and a folded position in which the side wall portion is folded toward the center portion of the bottom wall portion, a container body that can be changed between an assembled state in which all of the side wall portions are in the upright position and a folded state in which all of the side wall portions are in the folded position; a lid capable of closing an upper opening of the container body in the assembled state; Equipped with In a container configured to be able to place the lid body on an upper surface of the base part of the container body in the folded state, a connecting mechanism that rotatably connects the side wall portion to the bottom wall constituent portion 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 is a base lower vertical wall portion extending upward from the bottom wall portion; a base middle wall portion extending outward from the upper edge of the base lower vertical wall portion to the outside of the container body; a base upper vertical wall portion extending upward from an outer edge portion of the container body of the base middle wall portion; and a base shaft wall portion extending upward from each of both side edges of the base middle wall portion, The base-side shaft portion is provided at a lower portion of the base shaft wall portion, a shaft guide groove portion extending in a substantially vertical direction to an upper edge portion of the base shaft wall portion above the base-side shaft portion of the base shaft wall portion; The lid is provided with a protrusion that protrudes downward, When the lid body is placed on the top surface of the base part of the container body in the folded state, The protrusion is configured to face the base axial wall portion in the horizontal direction.

[0008] According to the first means, the state in which the lid is placed over the container body in the folded state can be stabilized.

[0009] Means 2. The side wall portion has, on its outer surface side, an upper wall portion, an extending wall portion extending from the lower edge of the upper wall portion toward the inside of the container body, and a lower wall portion extending downward from the tip edge of the extending wall portion, The container described in means 1 is characterized in that, in the assembled state of the container body, the lower wall portion and the base upper vertical wall portion are configured to face each other horizontally.

[0010] Means 3. The base part is The container body further includes a base upper vertical wall portion and a base upper stage wall portion extending outward from an upper edge of the base axial wall portion, A container as described in means 1 or 2, characterized in that in the container body in the folded state, the upper surface of the base upper wall portion is positioned higher than the upper ends of all of the side wall portions in the folded position.

[0011] Means 4. The base shaft wall portion has an axial wall surface adjustment portion extending from the inner edge of the container body to the outer side of the container body, A container according to any one of means 1 to 3, characterized in that it is provided with a locking wall support wall portion that protrudes from the axial wall surface adjustment portion toward a side away from the base vertical wall portion.

[0012] Means 5: A container according to Means 4, characterized in that the portion corresponding to the locking wall support wall portion is thinner than the portion corresponding to the base shaft wall portion. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 2 is a perspective view showing the container in an assembled state with the lid placed on the container body. [Figure 2] FIG. 2 is a perspective view of the container body in an assembled state. [Figure 3] FIG. 2 is a perspective view showing the top side of the container body in a folded state. [Figure 4] FIG. 2 is a perspective view showing the underside of the container body in a folded state. [Figure 5] FIG. 2 is a perspective view showing the underside of the lid body. [Figure 6] FIG. 2 is a perspective view showing the container with the lid body placed over the folded container body. [Figure 7] 10 is a perspective view showing a container body with the short-side side wall portions in an upright position and the long-side side wall portions in a folded position. FIG. [Figure 8] FIG. 2 is a perspective view showing the outer surface side of the short-side base component (the outer surface side of the short-side side wall portion). [Figure 9] FIG. 10 is a partially enlarged perspective view including a partial cross section showing the back side (short side internal space side) of the short side base component. [Figure 10] FIG. 10 is a perspective view showing the rear surface side (short side internal space side) of the short side inner surface forming portion. [Figure 11] FIG. 10 is a partially enlarged perspective view showing the rear surface side (short side internal space side) of the short side inner surface forming portion. [Figure 12] 10 is a perspective view showing the outer surface side of the long-side base component (the outer surface side of the long-side side wall portion). FIG. [Figure 13] 10 is a partially enlarged perspective view including a partial cross section showing the back side (long side internal space side) of the long side base component. FIG. [Figure 14] 10 is a partially enlarged perspective view including a partial cross section showing the back side (long side internal space side) of the long side base component. FIG. [Figure 15] FIG. 10 is a perspective view showing the back side (long side internal space side) of the long side inner surface constituent part. [Figure 16] FIG. 2 is a partially enlarged perspective view including a partial cross section showing the upper surface side of the bottom wall base component. [Figure 17] FIG. 2 is a partially enlarged perspective view including a partial cross section showing the underside of the bottom wall base component. [Figure 18] FIG. 2 is a partially enlarged perspective view including a partial cross section of a bottom wall lower surface component. [Figure 19] 10 is a partially enlarged vertical cross-sectional view showing the engagement portion between the side wall engaging portion of the short side wall portion and the base engaging portion of the short side base portion in the upright position. FIG. [Figure 20] 10 is a partially enlarged horizontal cross-sectional view showing the engagement portion between the side wall engaging portion of the short side wall portion and the base engaging portion of the short side base portion in an upright position. FIG. [Figure 21]10 is a partially enlarged vertical cross-sectional view showing the relative positional relationship between the long-side side wall portion and the long-side base portion in an upright position. FIG. [Figure 22] 10 is a partially enlarged vertical cross-sectional view showing the connecting portion between the short-side shaft protrusion and the short-side bearing portion. FIG. [Figure 23] FIG. 2 is a partially enlarged cross-sectional view of the container with the lid body placed over the folded container body. [Figure 24] FIG. 2 is a perspective view including a partial cross section showing the underside of the lid body. [Figure 25] FIG. 4 is a partially enlarged cross-sectional view showing a short-side side wall portion and a lid body. [Figure 26] FIG. 4 is a partially enlarged cross-sectional view showing a short-side side wall portion and a lid body. [Figure 27] FIG. 4 is a partially enlarged cross-sectional view showing a long-side side wall portion and a lid body. DETAILED DESCRIPTION OF THE INVENTION

[0014] An embodiment will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the container 1 includes a rectangular box-shaped container body 2 that opens upward, and a lid 3 that is removably fitted over the container body 2. As shown in FIGS. 3, 7, 16, and other figures, the container body 2 includes a bottom wall component 4 that includes a bottom wall 5 that is generally rectangular in plan view, short-side base portions 6 that protrude upward from the bottom wall 5 along each of the short sides of the bottom wall 5, and long-side base portions 7 that protrude upward from the bottom wall 5 along each of the long sides of the bottom wall 5. Furthermore, as shown in FIGS. 2 and 3, the container body 2 includes short-side side wall portions 8 and long-side side wall portions 9 that are rotatable between an upright position in which the short-side base portions 6 and the long-side base portions 7 are erected above the short-side base portions 6 and the long-side base portions 7, and a folded position in which the container body 2 is folded toward the center of the bottom wall 5. Therefore, when storing items in the container 1, all of the short side wall portions 8 and long side wall portions 9 are in an upright position, in an assembled state (see Figure 2), and when the container 1 is to be stored, etc., all of the short side wall portions 8 and long side wall portions 9 are in a folded position, in a folded state (see Figures 3 and 4), thereby making it possible to save space, etc.

[0015] 7 and 16, the protrusion length of the short-side base portion 6 from the bottom wall portion 5 is longer than the protrusion length of the long-side base portion 7 from the bottom wall portion 5, and as shown in Fig. 16, the position at which the short-side bearing portion 74 for rotatably supporting the short-side sidewall portion 8 is formed is also located higher than the position at which the long-side bearing portion 83 for rotatably supporting the long-side sidewall portion 9 is formed. Furthermore, as shown in Figs. 2, 7, etc., the width of the short-side sidewall portion 8 is configured to be approximately the same as the width of the bottom wall forming portion 4, and the width of the long-side sidewall portion 9 is configured to be approximately the same as the distance between the pair of short-side base portions 6. For this reason, in this embodiment, when the container body 2 in an assembled state in which all of the short side wall portions 8 and long side wall portions 9 are in an upright position is to be folded in which all of the short side wall portions 8 and long side wall portions 9 are in a folded position, a pair of long side side wall portions 9 are first displaced to the folded position by overlapping them above the bottom wall portion 5, and then the short side side wall portions 8 are displaced to the folded position by overlapping them above the long side side wall portions 9. On the other hand, when the container body 2 in the folded state is to be assembled, the short side side wall portions 8 as the first upright side wall portions are first displaced to the upright position, and then the long side side wall portions 9 are displaced to the upright position.

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

[0017] 8, 9, etc., the short-side base component 11 includes an upper wall 16 having a generally rectangular shape in front view, an extending wall 17 extending from the lower edge of the upper wall 16 toward the inside of the container body 2, and a lower wall 18 extending downward from the leading edge (inner edge) of the extending wall 17. The short-side outer base wall 15 includes a short-side frame wall 19 extending from the outer peripheral edge of the short-side outer base wall 15 toward the inside of the container body 2, and a short-side frame wall 19 extending from the left of the lower wall 18. It is equipped with short side shaft protrusions 20 as a pair of side wall shaft portions that protrude laterally from the lower part of the outer surface of the part corresponding to the right side edge portion toward the side of the short side base component 11, inner surface adjustment portions 21 that extend laterally from the inner edge of the container body 2 at parts of the short side frame wall portion 19 that correspond to the left and right side edges of the upper wall portion 16, and locking components 22 that protrude inward from the side edge of each inner surface adjustment portion 21 toward the inside of the container body 2.

[0018] 9, 19, and 20, in this embodiment, the short-side frame wall 19 has a double-wall structure in the inner and outer circumferential directions of the short-side frame wall 19 at a portion on the inner side of the container body 2, and a short-side insertion space 23 that opens toward the inside of the container body 2 is formed at that portion. Furthermore, for the portion of the double-wall structure on the inner circumferential side of the short-side frame wall 19, the inner edge of the container body 2 extends continuously at the same position along the entire periphery in the thickness direction of the short-side side wall 8. Also, as shown in FIGS. 8, 9, etc., the locking component 22 includes a substantially rectangular plate-shaped locking wall 24 that protrudes toward the inside of the container body 2 from the side edge of each inner surface adjustment portion 21 and extends in the height direction of the short-side side wall 8, and a locking hole 25 that opens toward the center of the short-side side wall 8 in the lateral direction of the locking wall 24.

[0019] As shown in Fig. 10, the short side inner surface constituent portion 13 includes a short side inner surface base wall portion 27 having a generally rectangular shape in front view, and a short side orthogonal wall portion 28 extending from the outer peripheral edge of the short side inner surface base wall portion 27 outward from the container body 2. As shown in Fig. 11, a short side tip wall portion 29 is provided at the tip side (outward from the container body 2) of the short side orthogonal wall portion 28, which is formed so as to reduce the thickness of the short side orthogonal wall portion 28 on the outer peripheral side. Then, as shown in Figs. 19 and 20, the short side tip wall portion 29 of the short side inner surface constituent portion 13 is inserted (press-fitted) into the short side insertion space 23 of the short side base constituent portion 11, whereby the short side inner surface constituent portion 13 is assembled to the short side base constituent portion 11, and a short side internal space 12 is formed between the short side base constituent portion 11 and the short side inner surface constituent portion 13. In this embodiment, a heat insulating member 10 is provided in the short side internal space 12, and the heat insulating member 10 is made of foamed polyurethane.

[0020] In this embodiment, the entire surfaces of the short-side base constituent part 11 and the short-side inner surface constituent part 13 that define the short-side internal space 12 are surface-treated to impart reactive activity for bonding with the thermal insulation member 10. Examples of surface treatments include flame treatment, corona discharge treatment, plasma treatment, and primer treatment. These treatments can convert the surface of the polyolefin resin, which originally has low activity, into a highly active surface with exposed active groups and dangling bonds (unbonded atomic hands). The surface-treated short-side base constituent part 11 and short-side inner surface constituent part 13 are assembled, and a raw material liquid for the thermal insulation member 10 (in this example, uncured polyurethane resin) is injected into the short-side internal space 12 and solidified to form the thermal insulation member 10. At this time, the surface treatment applied to the surfaces that define the short-side internal space 12 ensures strong bonding between the short-side base constituent part 11 and the short-side inner surface constituent part 13 and the thermal insulation member 10. The heat insulating member 10 is also provided in the same manner on the long side wall portions 9 and the bottom wall constituent portion 4, which will be described later. Although the surface of the lid body 3 is not treated, the raw material liquid of the heat insulating member 10 is poured into it and solidified. In addition, the injection ports for pouring the raw material liquid of the heat insulating member 10 into the short side side wall portions 8, the long side side wall portions 9, the bottom wall constituent portion 4, and the lid body 3 are provided in recesses formed in the mounting surface so that the plugs attached to the injection ports do not protrude from the mounting surface.

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

[0022] As shown in Figures 12, 13, etc., the long side base component 31 comprises a long side outer base wall 35 that is approximately rectangular when viewed from the front, a long side frame wall 36 that extends from the outer peripheral edge of the long side outer base wall 35 toward the inside of the container body 2, curved protrusions 37 that protrude downward from multiple points on the lower edge of the long side frame wall 36 and have an approximately semicircular shape with a curved bottom when the long side base component 31 is viewed from the side (side edge side), and long side shaft protrusions 38 as a pair of side wall shafts that protrude laterally from the long side base component 31 from the curved protrusions 37 provided on both sides of the lower edge of the long side frame wall 36.

[0023] 13, the upper edge of the long-side frame wall 36 extends less from the long-side outer base wall 35 than the side edges of the long-side frame wall 36. Furthermore, a folded wall 39 extends downward from the inner edge of the upper edge of the long-side frame wall 36, and a replacement wall 40 extends from the lower edge of the folded wall 39 toward the inside of the container body 2. The inner edge of the replacement wall 40 extends continuously with the inner edge of the side edge of the long-side frame wall 36. As shown in FIGS. 13, 14, 20, and 21, in this embodiment, the both side edges and the lower edge of the long-side frame wall 36, as well as the replacement wall 40, have a double-wall structure in the inner and outer periphery directions of the long-side frame wall 36, and a long-side insertion space 41 that opens toward the inside of the container body 2 is formed in this portion.

[0024] Furthermore, the lower edge of the long side frame wall 36 includes a long side frame lower first wall 42 extending from the long side outer base wall 35 toward the inside of the container body 2, a long side frame lower vertical wall 43 extending downward from the tip edge of the long side frame lower first wall 42, and a long side frame lower second wall 44 extending from the lower part of the long side frame lower vertical wall 43 toward the inside of the container body 2, so that the long side frame lower second wall 44 has a double-wall structure. Furthermore, with regard to the inner peripheral component of the double-wall structure, the inner edge of the container body 2 extends continuously around the entire periphery at the same position in the thickness direction of the long side side wall 9. In contrast, with regard to the outer peripheral component of the double-wall structure, the portion corresponding to the long-side frame lower second wall portion 44 protrudes further inward of the container body 2 than the other portions of the outer peripheral component of the double-wall structure, and also protrudes further inward of the container body 2 than the inner peripheral component of the double-wall structure (with regard to the other portions of the outer peripheral component of the double-wall structure, the inner peripheral component of the double-wall structure protrudes further inward of the container body 2). The curved protrusion 37 is provided to protrude downward from the outer peripheral component of the double-wall structure corresponding to the long-side frame lower second wall portion 44.

[0025] 7 and 12, both sides on the outer surface of the long side outer base wall portion 35 are provided with locked components 45 that are in approximate contact with and locked to the locking components 22 of the short side side wall portion 8 when the container body 2 is assembled. The locked components 45 include locked wall portions 46 that are configured such that corresponding portions of the long side outer base wall portion 35 are recessed inward of the container body 2 (so that the thickness on the outer surface of the short side side wall portion 8 is eliminated), and locking projections 47 that protrude from the locked wall portions 46 outward of the container body 2.

[0026] When the container body 2 is assembled, the outer surfaces of the locking components 45 of the long side wall portions 9 substantially abut against the locking components 22 of the short side wall portions 8, thereby restricting outward displacement of the long side wall portions 9 from the container body 2. In addition, both sides of the long side wall portions 9 (sides of the locking components 45) substantially abut against the inner surfaces of the short side wall portions 8, thereby restricting inward displacement of the short side wall portions 8 from the container body 2. Furthermore, the locking projections 47 of the locking components 45 of the long side wall portions 9 are inserted into the locking holes 25 of the locking components 22 of the short side wall portions 8 to be locked, thereby restricting outward displacement of the short side side wall portions 8 from the container body 2 and relative displacement between the short side side wall portions 8 and the long side side wall portions 9 in the up-and-down direction.

[0027] As shown in FIG. 15 , the long side inner surface forming portion 33 includes a long side inner surface base wall portion 49 having a generally rectangular shape in front view, and a long side orthogonal wall portion 50 extending from the outer peripheral edge of the long side inner surface base wall portion 49 outward from the container body 2. A long side tip wall portion 51 is provided in a portion of the long side orthogonal wall portion 50 that is on the outer side of the container body 2, and is formed so as to reduce the thickness of the long side orthogonal wall portion 50 on the outer peripheral side. As shown in FIGS. 20 and 21 , the long side tip wall portion 51 of the long side inner surface forming portion 33 is inserted (press-fitted) into the long side insertion space 41 of the long side base forming portion 31, thereby assembling the long side inner surface forming portion 33 to the long side base forming portion 31, and forming a long side internal space 32 between the long side base forming portion 31 and the long side inner surface forming portion 33. In this embodiment, a heat insulating member 10 made of foamed polyurethane is provided in the long side internal space 32.

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

[0029] The short-side base portion 6 extends upward from the short-side edge of the bottom wall upper surface base wall portion 64. Comprises the "vertical wall section under the base" A lower vertical wall portion 66 of the short side base and a portion extending outward from the upper edge of the lower vertical wall portion 66 of the short side base to the container body 2 Comprises the "middle wall of the base" The short side base middle wall portion 67 and the short side base middle wall portion 67 extend upward from the outer edge of the container body 2. Comprises the "vertical wall section on the base" Extending upward from both side edges of the upper vertical wall portion 68 of the short side base and the middle wall portion 67 of the short side base Forms the "base axis wall" The short side base axial wall portion 69, the short side base inner upper vertical wall portion 68, and the short side base axial wall portion 69 extend outward from the upper edge portion of the short side base axial wall portion 69 to the outside of the container body 2. Forms the "upper base wall" It comprises a short side base upper wall portion 70, a short side base outer vertical wall portion 71 extending downward from the outer edge of the container body 2 of the short side base upper wall portion 70, an axial wall adjustment portion 72 extending from the inner edge of the container body 2 of the short side base axial wall portion 69 to the outer side of the container body 2 (to the lateral side in the width direction of the short side side wall portion 8), and a locking wall support wall portion 73 protruding from the axial wall adjustment portion 72 toward the longitudinal center of the long side base portion 7.

[0030] In this embodiment, short-side bearing portions 74 serving as base-side shaft portions are provided at the bottom of each short-side base shaft wall portion 69. As shown in FIG. 22 , short-side shaft protrusions 20 are inserted into the short-side bearing portions 74 and are approximately fitted to the extent that rotation of the short-side shaft protrusions 20 is permitted. This allows the short-side side wall portion 8 to be rotatably connected (pivotally supported) to the short-side base portion 6. Also, as shown in FIGS. 16 and 22 , short-side shaft guide groove portions 75 are provided in the short-side base shaft wall portion 69, extending in an approximately vertical direction from a position slightly above the short-side bearing portions 74 to the upper edge of the short-side base shaft wall portion 69. 3, 4, and 22, the short-side base outer vertical wall portion 71 is configured so that the 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 outward from the container body 2. However, the short-side base upper wall portion 70 only has a recess formed in a portion located above the short-side shaft guide groove portion 75 to open the short-side shaft guide groove portion 75 upward, and the portion on the outer side of the container body 2 is not omitted.

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

[0032] 16, the long-side base portion 7 is provided with rotation-permitting recesses 82 extending from the long-side base middle wall portion 78 to the long-side base inner lower vertical wall portion 77, allowing the curved protrusions 37 of the long-side side wall portion 9 to be inserted therein (see FIG. 21). The rotation-permitting recesses 82 are provided at both ends of the long-side base portion 7, and are also provided at a plurality of locations at the longitudinal midpoint of the long-side base portion 7 corresponding to the curved protrusions 37. In this embodiment, long-side bearing portions 83 serving as base-side shaft portions are provided on the short-side base inner lower vertical wall portion 66 of the short-side base portion 6 at positions facing the rotation-permitting recesses 82 provided at both ends of the long-side base portion 7. The long-side shaft protrusions 38 are inserted into the long-side bearing portions 83, and are substantially fitted to such an extent that rotation of the long-side shaft protrusions 38 is permitted. As a result, the long-side sidewall portions 9 are rotatably connected (axially supported) to the short-side base portion 6. In particular, in this embodiment, the long-side bearing portions 83 extend from the lower edge to the upper edge of the lower vertical wall portion 66 within the short-side base. In other words, when the long-side sidewall portions 9 are in the folded position (the short-side sidewall portions 8 remain in the upright position), the long-side sidewall portions 9 are configured to be vertically displaceable relative to the bottom wall constituent portion 4 so that, when the long-side sidewall portions 9 are in the folded position (the short-side sidewall portions 8 remain in the upright position), the long-side sidewall portions 9 are allowed to be stacked vertically within the range where the long-side shaft protrusions 38 are inserted into the long-side bearing portions 83 (see FIG. 7 ).

[0033] Furthermore, as shown in Figure 17, etc., in this 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 periphery directions of the short side base portion 6 and the long side base portion 7 (inner and outer directions of the container body 2), and a bottom wall insertion space 84 that opens downward is formed in that portion.

[0034] 18, the bottom wall lower surface forming portion 63 includes a bottom wall lower surface base wall portion 86 having a generally rectangular shape when viewed from below, and a bottom wall orthogonal wall portion 87 that protrudes upward from the outer periphery of the bottom wall lower surface base wall portion 86. As shown in FIGS. 4 and 18, the outer periphery of the bottom wall lower surface base wall portion 86 has a convex shape that protrudes downward, and downwardly protruding ribs are provided in a lattice pattern on the inner periphery of the outer periphery of the bottom wall lower surface base wall portion 86 on the underside of the bottom wall lower surface base wall portion 86. The bottom wall orthogonal wall portion 87 extends upward in a generally vertical direction from the bottom wall lower surface base wall portion 86, and further extends from its tip edge toward the outside of the container body 2, forming a stepped shape that extends generally vertically upward across a curved portion.

[0035] 18 and other figures, an upper portion of the bottom wall orthogonal wall portion 87 is provided with a bottom wall tip wall portion 88 that is formed so as to reduce the thickness of the outer circumferential side of the bottom wall orthogonal wall portion 87. Then, as shown in Figures 19 and 21 and other figures, the bottom wall tip wall portion 88 of the bottom wall lower surface forming portion 63 is inserted (press-fitted) into the bottom wall insertion space 84 of the bottom wall base forming portion 61, whereby the bottom wall lower surface forming portion 63 is assembled to the bottom wall base forming portion 61, and a bottom wall internal space 62 is formed between the bottom wall base forming portion 61 and the bottom wall lower surface forming portion 63. In this embodiment, a heat insulating member 10 made of foamed polyurethane is provided in the bottom wall internal space 62.

[0036] As shown in Figures 1 and 5, the lid 3 is configured to be able to close the top opening 91 (see Figure 2) of the container body 2 in an assembled state. A lid main body 92 constituting the outer shape of the lid 3 of this embodiment is integrally formed from a polyolefin resin (polypropylene in this embodiment) by blow (hollow) molding so that a lid internal space 93 (see Figures 23 and 25) is formed. In this embodiment, a heat insulating member 10 made of foamed polyurethane is provided in the lid internal space 93.

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

[0038] 16 and 22, the short-side bearing portions 74 of this embodiment are provided so as to penetrate the short-side base shaft wall portions 69, and the short-side base outer vertical wall portions 71 are also omitted in the area where the short-side shaft guide groove portions 75 extending above the short-side bearing portions 74 are provided. Therefore, there are portions of the short-side shaft protrusions 20 and the short-side bearing portions 74 where no heat insulating member 10 is interposed between them and the external space of the container body 2. In this regard, in this embodiment, as shown in FIG. 20, the heat insulating members 10 of the short-side sidewall portions 8 and the long-side sidewall portions 9 are arranged on the inward side of the container body 2 of the short-side shaft protrusions 20 and the short-side bearing portions 74, with the heat insulating member 10 of the lid 3 arranged above and the heat insulating member 10 of the bottom wall constituent portion 4 arranged below (see FIG. 22). 20, in the width direction of the long-side side wall 9, the portion (side surface) of the long-side side wall 9 where the heat insulating member 10 is located and the portion (inner surface) of the short-side side wall 8 where the heat insulating member 10 is located are configured to be close to (or abut) each other (with almost no gap). In other words, the heat insulating member 10 also insulates the internal space and external space of the container body 2 at the peripheral portions of the short-side shaft protrusion 20 and the short-side bearing 74.

[0039] Furthermore, as shown in Figure 21, with regard to the long side side wall portion 9, when the container body 2 is in an assembled state, the outer surface side of the long side 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 area facing each other horizontally). In this embodiment, the portion of the long side side wall portion 9 where the long side internal space 32 (insulating member 10) is provided is not horizontally (inside and outside the container body 2) opposite the portion of the long side base portion 7 where the bottom wall internal space 62 (insulating member 10) is provided, but the distance between the portion of the long side side wall portion 9 where the insulating member 10 is located and the portion of the long side base portion 7 where the insulating member 10 is located is relatively close, and with respect to the curved protrusion 37 of the long side side wall portion 9, the portion of the long side base portion 7 where the insulating member 10 is located is located on the outer side of the container body 2.

[0040] 2, in this embodiment, the curved protrusions 37 of the long-side sidewalls 9 face the internal space (the space for accommodating articles) of the container body 2, and no heat insulating member is provided on the curved protrusions 37. Therefore, there are portions of the long-side shaft protrusions 38 and the long-side bearings 83 where no heat insulating member 10 is interposed between them and the internal space of the container body 2. In this regard, as shown in FIG. 16, the bottom wall constituents 4 (short-side bases 6) that house the heat insulating member 10 are disposed on the outer side of the container body 2 of the long-side shaft protrusions 38 and the long-side bearings 83, and furthermore, the heat insulating members 10 of the short-side sidewalls 8 and the bottom wall constituents 4 are disposed above and below them (the heat insulating member 10 of the long-side bases 7 is disposed on the outer side of the container body 2 of the curved protrusions 37). That is, the long-side shaft protrusions 38 and the peripheral edges of the long-side bearing portions 83 are also insulated by the heat insulating member 10 between the internal space and the external space of the container body 2 .

[0041] As shown in Figures 3, 16, 19, etc., in this embodiment, the inner surface of each short-side base portion 6 is provided with a base-side engagement portion 103 (protrusion) that protrudes from the short-side base inner upper vertical wall portion 68 toward the inside of the container body 2. The base-side engagement portions 103 provided on each short-side base portion 6 are provided at two locations, each pair of left and right, in the width direction of the short-side base portion 6. In other words, the base-side engagement portions 103 in this embodiment are provided in the short-side base overlapping region 102. Furthermore, the base-side engagement portion 103 is protruding in shape with the vertical direction as the longitudinal direction, and its upper edge portion (upper surface) is flush with the upper surface of the short-side base upper wall portion 70, and its lower edge portion is spaced above the short-side base middle wall portion 67.

[0042] 3, 8, 19, etc., the lower wall portion 18 on the outer surface of the short-side sidewall portion 8 is provided with concave sidewall-side engaging portions 104 (recesses) into which a pair of left and right base-side engaging portions 103 can be inserted, at two locations corresponding to the two pairs of base-side engaging portions 103 provided at the two locations. In other words, the sidewall-side engaging portions 104 in this embodiment are provided in the short-side sidewall overlapping region 101. Furthermore, even in the portion of the lower wall portion 18 where the sidewall-side engaging portions 104 are provided, a short-side internal space 12 is formed between the short-side inner surface forming portion 13 and the short-side insulating member 10, and the heat insulating member 10 is provided.

[0043] In addition, in this embodiment, the lower wall portion 18 of the short-side side wall portion 8 is located more inward of the container body 2 than the upper wall portion 16, and the lower portion of the outer surface of the short-side side wall portion 8 is cut out outward of the lower wall portion 18 and below the extending wall portion 17. In this embodiment, the area outward of the lower wall portion 18 and below the extending wall portion 17 corresponds to the stepped recess 105. Furthermore, 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 stepped recess 105).

[0044] 19, by placing the short-side side wall portions 8 in an upright position (when the container body 2 is assembled), the short-side base overlapping regions 102 of the short-side base portions 6 are accommodated in the stepped recesses 105. Furthermore, as shown in FIGS. 19 and 20, a pair of base engaging portions 103 are inserted into each sidewall engaging portion 104, and the sidewall engaging portions 104 and the base engaging portions 103 are engaged with each other in a concave-convex manner in the horizontal direction. Furthermore, when the container body 2 is assembled, the sidewall engaging portions 104 and the base engaging portions 103 are configured to be sandwiched between the heat insulating member 10 in the horizontal and vertical directions. In other words, when the container body 2 is assembled, the side wall engaging portion 104 and the base engaging portion 103 are sandwiched between the insulating member 10 of the short side side wall portion 8 and the insulating member 10 of the short side base portion 6 in the inward / outward direction of the container body 2 (thickness direction of the short side side wall portion 8), sandwiched between the insulating member 10 of the short side side wall portion 8 in the width direction of the short side side side wall portion 8, and sandwiched between the insulating member 10 of the short side side wall portion 8 (and the insulating member 10 of the short side base portion 6) in the vertical direction.

[0045] Furthermore, the base-side engaging portion 103 protrudes in a direction perpendicular to the substantially flat short-side base inner upper vertical wall portion 68. In contrast, as shown in FIGS. 8 and 20 , both side edges (inner surfaces) of the sidewall-side engaging portion 104 extend at an angle so as to gradually widen the distance between them toward the outside of the container body 2 when the short-side sidewall portion 8 is in the upright position. Therefore, when the short-side sidewall portion 8 in the folded position is brought into the upright position, if the sidewall-side engaging portion 104 is displaced from the appropriate relative position for engaging with the base-side engaging portion 103 in the width direction of the short-side sidewall portion 8, i.e., if the short-side sidewall portion 8 is displaced from the appropriate relative position with respect to the short-side base portion 6, the base-side engaging portion 103 will abut against the inner surface (hereinafter referred to as the "inclined portion 106") of the sidewall-side engaging portion 104. Furthermore, by displacing the short-side side wall portion 8 from the abutting state to the upright position, the base-side engaging portion 103 comes into sliding contact with the inclined portion 106, and the short-side base portion 6 is guided to the appropriate relative position. When the container body 2 is in an assembled state, (almost) the entire base-side engaging portion 103 is housed inside the sidewall-side engaging portion 104, and the lower wall portion 18 of the short-side side wall portion 8 and the upper vertical wall portion 68 inside the short-side base of the short-side base portion 6 are in abutting contact or close proximity to each other.

[0046] In addition, when only the short-side sidewalls 8 are set to the upright position (the position shown in FIG. 7) during the process of assembling the folded container body 2, the lower surface of the extending wall 17 (the upper edge of the stepped recess 105) and the upper edge of the sidewall engaging portion 104 are supported by contacting the upper surface of the short-side base upper wall portion 70 of the short-side base 6 and the upper edge (upper surface) of the base engaging portion 103 (see FIGS. 16 and 19). As a result, even if the worker does not hold the upright short-side sidewalls 8, the short-side sidewalls 8 are able to maintain the upright position (stand independently).

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

[0048] 1, 26, etc., the upper wall portion 16 of each short-side side wall portion 8 is provided with a handle portion 107 at a position below the upper edge of the upper wall portion 16, which allows an operator to easily grasp the assembled container body 2 (container 1). Also, at 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 constituent portion 13 and the short-side internal space 12, and a heat insulating member 10 is provided. In this embodiment, no handle portion is provided on the long-side side wall portion 9 where no side wall engaging portion is provided.

[0049] 1, 2, and 26, the upper wall 16 of each short-side side wall 8 is provided with a handle 108 that is recessed from a position slightly below the lower edge of the outer circumferential surface of the lid 3 to the upper edge of the short-side side wall 8 when the lid 3 is placed on the assembled container body 2. This makes it possible to lift the lid 3 by hooking the fingertips on the underside of the lid 3 via the handle 108 when removing the lid 3 from the container body 2.

[0050] 2, 25, and 27, the upper edges of the short-side sidewalls 8 and the long-side sidewalls 9 are provided with lid stopper projections 111, which project upward from the upper surfaces of the upper edges of the short-side frame walls 19 and the long-side frame walls 36 and extend in the width direction of the short-side sidewalls 8 and the long-side sidewalls 9, and which include a base 111a, an upper flange 111b projecting inward from the upper edge of the base 111a toward the container body 2, and an intermediate flange 111c projecting outward from the container body 2 from a middle position in the height direction of the base 111a. Meanwhile, as shown in FIGS. 24, 25, and 27, the underside of the lid 3 is provided with lid stopper recesses 112 into which the upper flanges 111b of the lid stopper projections 111 approximately fit. 24 and 25, an engaging protrusion 113 is provided that protrudes from the side edge on the inner periphery of the lid stopper recess 112 toward the inside of the lid stopper recess 112 and engages with the underside of the upper flange 111b of the lid stopper protrusion 111. In addition, as shown in FIG. 26, the handle 108 is provided in a manner that omits the corresponding portion of the intermediate flange 111c. Also, as shown in FIG. 24, a connecting wall 114 is provided in the center of the lid body 3 (lid main body 92) that connects the wall that forms the lower surface of the lid main body 92 to the wall that forms the upper surface of the lid main body 92 in a manner that deforms the wall that forms the lower surface of the lid main body 92 upward.

[0051] As described above in detail, according to this embodiment, when the container body 2 is in an assembled state, the sidewall-side engaging portions 104 and the base-side engaging portions 103 are engaged with each other in a concave-convex manner in the horizontal direction, so that when an article is stored in the assembled container body 2 and the container 1 is carried by placing a hand on the short-side sidewall portion 8 (handle portion 107) on which the sidewall-side engaging portions 104 are provided, the load on the connecting mechanism (short-side shaft protrusions 20 and short-side bearings 74) that rotatably connects the short-side sidewall portion 8 to the bottom wall constituent portion 4 can be reduced. Consequently, the load on the connecting mechanism (long-side shaft protrusions 38 and long-side bearings 83) that rotatably connects the long-side sidewall portion 9 to the bottom wall constituent portion 4 can also be reduced. Therefore, the connecting mechanism is protected, and the connection state between the short side wall portion 8 and the long side wall portion 9 and the bottom wall component 4 is stabilized, thereby preventing situations such as the short side side wall portion 8 and the long side side wall portion 9 coming off the bottom wall component 4.

[0052] Furthermore, the sidewall-side engaging portion 104 and the base-side engaging portion 103 stabilize the connection between the short-side sidewall portion 8 and the long-side sidewall portion 9 and the bottom wall constituent portion 4 when the container body 2 is assembled, thereby simplifying the connection mechanism, reducing the extent to which thermal insulation is reduced due to the connection mechanism, and minimizing the reduction in thermal insulation around the connection mechanism. In this embodiment, the short-side shaft protrusions 20 and the long-side shaft protrusions 38 are configured to protrude laterally from the side surfaces of the short-side sidewall portion 8 and the long-side sidewall portion 9, which improves the thermal insulation and airtightness of the lower edge portions compared to, for example, a configuration in which a plurality of shafts are provided protruding downward from the lower edge portions of the short-side sidewall portion 8 and the long-side sidewall portion 9. Furthermore, the sidewall-side engaging portion 104 and the base-side engaging portion 103 are configured to be sandwiched between the insulating members 10 in the horizontal and vertical directions when the container body 2 is assembled, and this prevents a decrease in thermal insulation around the sidewall-side engaging portion 104 and the base-side engaging portion 103. Therefore, by providing the sidewall-side engaging portion 104 and the base-side engaging portion 103, it is possible to improve the durability of the connecting mechanism, while avoiding a decrease in thermal insulation due to the provision of the sidewall-side engaging portion 104 and the base-side engaging portion 103, and improving the cold and warm insulation properties of the container 1.

[0053] Furthermore, when the container body 2 is assembled, the insulating members 10 of the short side side wall portions 8 and long side side wall portions 9 are arranged on the inside of the container body 2 relative to the short side shaft protrusions 20 and short side bearing portions 74. Furthermore, when the container body 2 is assembled, the insulating members 10 of the bottom wall constituent portion 4 (short side base portion 6) are arranged on the outside of the container body 2 relative to the long side shaft protrusions 38 and long side bearing portions 83. This prevents a decrease in the insulating properties of the periphery of the connecting mechanism. Therefore, the connecting mechanism can be reliably installed while improving the cold and heat insulation effect of the container 1.

[0054] In addition, the inner surface of the sidewall-side engaging portion 104 is configured as an inclined portion 106 that can guide relative displacement of the sidewall-side engaging portion 104 to an appropriate relative position in which the sidewall-side engaging portion 104 is engaged with the base-side engaging portion 103 in the width direction of the short-side sidewall portion 8. Therefore, when the short-side sidewall portion 8 is brought from the folded position to the upright position, in order to make it easier to engage (insert) the base-side engaging portion 103 with the sidewall-side engaging portion 104, a clearance between the sidewall-side engaging portion 104 and the base-side engaging portion 103 in the width direction of the short-side sidewall portion 8 can be ensured, and when the container body 2 is fully assembled, the sidewall-side engaging portion 104 and the base-side engaging portion 103 can be configured to have an appropriate relative positional relationship. Therefore, the ease of assembly of the container body 2 can be improved, and the engaged state of the sidewall-side engaging portion 104 and the base-side engaging portion 103 can be stabilized. Furthermore, the short-side side wall portions 8 and the bottom wall constituent portion 4 can also be in an appropriate relative positional relationship in the width direction of the short-side side wall portion 8 (direction of the rotation axis of the short-side side wall portion 8), which makes it possible to stabilize the connection state of the short-side side wall portion 8 with respect to the bottom wall constituent portion 4 (preventing the short-side shaft protrusions 20 from slipping out and falling off the short-side bearing portions 74).In addition, by making the relative position of the short-side side wall portions 8 with respect to the bottom wall constituent portion 4 an appropriate position, the engagement operation between the short-side side wall portions 8 and the long-side side wall portions 9 (engagement between the locking components 22 and the locked components 45) can be made relatively smooth.

[0055] Furthermore, when the container body 2 in the folded state is assembled, the short side side wall portions 8 can be left standing with only the short side side wall portions 8 in an upright position. In particular, since the upper edge portions (upper surfaces) of the base-side engagement portions 103 that protrude inward of the container body 2 from the short side base inner upper vertical wall portions 68 of the short side base portion 6 are flush with the upper surface of the short side base portion 6 (short side base upper wall portions 70), even if the upright short side side wall portions 8 are slightly displaced inward of the container body 2, the upper edge portions (lower surfaces of the extending wall portions 17) of the stepped recesses 105 of the upright short side side wall portions 8 are supported by abutting against the upper surfaces of the base-side engagement portions 103. Therefore, it is possible to avoid a situation in which the short side wall portion 8 in the upright position shifts to a behavior in which it shifts to the folded position simply by being slightly displaced inward of the container body 2, thereby improving the self-standing stability of the short side wall portion 8.

[0056] In addition, by covering the assembled container body 2 with the lid 3, the cold and heat retention properties of the container 1 can be further improved. The lid 3 can also be covered on the folded container body 2, allowing the container 1 to be compactly packed with the container body 2 and lid 3 assembled as a set. Furthermore, by covering the folded container body 2 with the lid 3, the underside of the lid 3 is supported by contacting not only the upper surface of the short side base portion 6 (short side base upper wall portion 70) but also the upper surface of the base side engagement portion 103. This allows for stability when the lid 3 is placed on the folded container body 2.

[0057] The present invention is not limited to the above-described embodiment, and may be implemented as follows: Of course, other applications and modifications not exemplified below are also possible.

[0058] (a) In the above embodiment, the short-side side wall 8 is configured as the leading side wall, but it is also possible to configure the long-side side wall 9 to be the leading side wall. Furthermore, in the above embodiment, the short-side side wall 8 in the folded position do not overlap each other vertically, and both short-side side wall 8 correspond to the leading side wall. However, the short-side side wall 8 in the folded position may overlap each other vertically, with the upper overlapping one corresponding to the leading side wall. When this configuration is adopted, the base-side engagement portion 103 may be configured to be flush with the upper surface of the base (short-side base upper wall portion 70) only for the base portion (e.g., one short-side base portion 6) that corresponds (or can correspond to) the leading side wall.

[0059] Furthermore, in the above embodiment, the long side base portion 7 is provided corresponding to the long side side wall portion 9 that assumes an upright position after the short side side wall portion 8 when the container body 2 is changed from the folded state to the assembled state, but because 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 (supporting the lower side portion of the upright long side side wall portion 9 on the upper surface of the bottom wall portion 5). That is, the base portion of the bottom wall portion forming portion 4 may be configured to include a base portion (the short side base portion 6 in the above embodiment) that corresponds to the side wall portion (the short side side wall portion 8 in the above embodiment) that assumes an upright position first when the container body 2 is changed from the folded state to the assembled state, the short side bearing portion 74, and the long side bearing portion 83 (forming a pair of approximately U-shaped openings facing each other in a plan view).

[0060] (b) In the above embodiment, the sidewall engaging portion 104 is provided on the short-side sidewall portion 8 and the base engaging portion 103 is provided on the short-side base portion 6. However, instead of or in addition to this configuration, the sidewall engaging portion may be provided on the long-side sidewall portion 9 and the base engaging portion may be provided on the long-side base portion 7. Also, in the above embodiment, the handle portion 107 is provided on the short-side sidewall portion 8. However, in addition to or instead of this configuration, the handle portion 107 may be provided on the long-side sidewall portion 9. Furthermore, by providing the base engaging portion 103 on the short-side base portion 6 corresponding to the leading upright sidewall portion (the short-side sidewall portion 8 in the above embodiment) and making its upper surface flush with the upper surface of the short-side base upper wall portion 70, it is possible to stabilize the short-side sidewall portion 8 when it is independently in an upright position and to stabilize the state in which the lid 3 is placed on the container body 2 in the folded state. It is also possible to provide the upper side of the base side engaging portion 103 below the short side base upper wall portion 70.

[0061] Furthermore, in the above embodiment, the sidewall-side engaging portion 104 has a convex shape and the base-side engaging portion 103 has a concave shape, but the sidewall-side engaging portion 104 may have a concave shape and the base-side engaging portion 103 may have a convex shape. In addition, in the above embodiment, the inner surface of the sidewall-side engaging portion 104 is configured as the inclined portion 106, so that the short-side sidewall portion 8 is positioned appropriately relative to the short-side base portion 6 in the width direction of the short-side sidewall portion 8 when the short-side sidewall portion 8 is in the upright position. However, instead of or in addition to this 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 inside of the container body 2). The inclined portion 106 may also 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, but the short side bearing portion 74 may be a recessed portion instead of a through hole, and the short side base outer vertical wall portion 71 may be provided in 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, ultimately, the heat insulating member 10 may be provided. In this case, it is possible to improve the heat insulation in the vicinity of the short side shaft protrusion portion 20 and the short side bearing portion 74.

[0063] In the above embodiment, the long-side internal space 32, and therefore 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 insulating properties around the long-side shaft protrusion 38 and the long-side bearing 83.

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

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

[0066] In addition, in the above embodiment, the entire surface of the short side base component 11 and the short side inner surface component 13 that defines the short side internal space 12 is configured to be surface treated to impart reactive activity for bonding with the insulating member 10, but the surface treatment range may be limited to only a part of the surface that defines the short side internal space 12, or the configuration may be such that no surface treatment is performed (the same applies to the long side side wall component 9 and the bottom wall component 4).

[0067] Furthermore, in the above embodiment, the lid body 3 is constructed as a single unit by blow molding, but the lid body 3 may also be constructed by connecting multiple components (for example, by assembling an upper component that constitutes the upper surface side of the lid body 3 and a lower component that constitutes the lower surface side of the lid body 3, and providing an insulating member 10 in the lid body internal space 93).

[0068] (f) In the above embodiment, the long side base constituent portion 31, the long side inner surface constituent portion 33, the short side base constituent portion 11, the short side inner surface constituent portion 13, the bottom wall base constituent portion 61, the bottom wall undersurface constituent portion 63, and the lid main body 92 are made of polypropylene, but they may be made of other polyolefin resins (polyethylene, etc.) or synthetic resins other than polyolefins (e.g., ABS resin, AES resin, acrylic resin, polycarbonate, etc.). In addition, the long side base constituent portion 31 (short side base constituent portion 11, bottom wall base constituent portion 61) and the long side inner surface constituent portion 33 (short side inner surface constituent portion 13, bottom wall undersurface constituent portion 63) may be made of different materials. [Explanation of symbols]

[0069] 1...container, 2...container body, 3...lid body, 4...bottom wall constituent part, 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...insulating member, 11...short side base constituent part, 12...short side internal space, 13...short side internal surface constituent part, 15...short side external surface base wall part, 18...lower wall part, 20...short side shaft protrusion part, 31...long side base constituent part, 32...long side internal space, 33...long side internal surface constituent part portion, 38...long side shaft protrusion portion, 61...bottom wall base constituent portion, 62...bottom wall internal space, 63...bottom wall lower surface constituent portion, 68...short side base inner upper vertical wall portion, 70...short side base upper wall portion, 74...short side side bearing portion, 83...long side side bearing portion, 91...upper surface opening, 92...lid main body, 93...lid main body internal space, 101...short side side wall overlapping area, 102...short side side base overlapping area, 103...base side engaging portion, 104...side wall side engaging portion, 106...inclined portion.

Claims

1. a bottom wall component including a bottom wall portion having a generally rectangular shape in a plan view and a base portion protruding upward along a side edge portion of the bottom wall portion; The bottom wall portion has a side wall portion connected to the base portion of the bottom wall portion so as to be rotatable between an upright position in which the side wall portion is erected above each side edge portion of the bottom wall portion and a folded position in which the side wall portion is folded toward the center portion of the bottom wall portion, a container body that can be changed between an assembled state in which all of the side wall portions are in the upright position and a folded state in which all of the side wall portions are in the folded position; a lid capable of closing an upper opening of the container body in the assembled state; Equipped with In a container configured to be able to place the lid body on an upper surface of the base part of the container body in the folded state, a connecting mechanism that rotatably connects the side wall portion to the bottom wall constituent portion 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 is a base lower vertical wall portion extending upward from the bottom wall portion; a base middle wall portion extending outward from the upper edge of the base lower vertical wall portion to the outside of the container body; a base upper vertical wall portion extending upward from an outer edge portion of the container body of the base middle wall portion; and a base shaft wall portion extending upward from each of both side edges of the base middle wall portion, The base-side shaft portion is provided at a lower portion of the base shaft wall portion, a shaft guide groove portion extending in a substantially vertical direction to an upper edge portion of the base shaft wall portion above the base-side shaft portion of the base shaft wall portion; The lid is provided with a protrusion that protrudes downward, A container characterized in that, when the lid body is placed on the upper surface of the base portion of the container body in the folded state, the protrusion of the lid body is configured to face horizontally opposite the base axis wall portion.

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

3. The base portion is The container body further includes a base upper vertical wall portion and a base upper stage wall portion extending outward from an upper edge of the base axial wall portion, A container as described in claim 1 or 2, characterized in that in the container body in the folded state, the upper surface of the base upper wall portion is positioned higher than the upper ends of all of the side wall portions in the folded position.

4. The base shaft wall portion has an axial wall surface adjustment portion extending from an inner edge of the container body to an outer side of the container body, 4. The container according to claim 1, further comprising a locking wall support wall portion that protrudes from the axial wall surface adjustment portion to a side away from the base upper vertical wall portion.

5. 5. The container according to claim 4, wherein a portion of the container corresponding to the locking wall support wall portion is thinner than a portion of the container corresponding to the base shaft wall portion.

Images