container

Abstract

To provide a container allowed to improve the rotation of a sidewall part.SOLUTION: A container includes a container body 2 comprising a longer-sided sidewall part 9 constituted by a longer-sided base configuring part 31 and a longer-sided inner-face configuring part 33 positioned inner of the container body 2 relative to the longer-sided base configuring part 31 so as to form a longer-sided internal space 32 with the longer-sided base configuring part 31. The longer-sided base configuring part 31 has a longer-sided picture-frame wall portion 36 having a lower side portion comprising a longer-sided outer tip wall portion 42b positioned below a lower side portion of a longer-sided orthogonal wall portion 50 of the longer-sided inner-face configuring part 33. The longer-sided base configuring part 31 comprises auxiliary projections 37 protruding downward from the longer-sided outer tip wall portion 42b. One pair of longer-sided axial projections 38 coupling the longer-sided sidewall part 9 to be rotatable and displaceable relative to a bottom-wall configuring part 4 are respectively provided on corresponding auxiliary projections 37, in which each auxiliary projection 37 comprises a curved portion 37a that is curved along a rotating direction of the longer-sided axial projection 38 and allowed to slide contact with the bottom-wall configuring part 4.SELECTED DRAWING: Figure 13

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 has a substantially rectangular bottom wall, a bottom wall component having bases that protrude upward along each side edge of the bottom wall, and side wall parts 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 part above the bottom wall part. There is also a technology that makes each side wall part and the bottom wall component have a hollow structure to improve cold and heat retention 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] In a configuration having a side wall portion, it is desirable to prevent damage to the pivot shaft of the side wall portion relative to the bottom wall component.

[0005] The present invention has been made to solve the problems exemplified above, and an object of the present invention is to provide a container that can prevent damage to the pivot shaft. [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 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, At least a pair of opposing first side wall portions of the side wall portions are composed of a first member and a second member that is located on the outer side of the container with respect to the first member and forms an internal space between the first member and the second member, a pair of pivot shafts that pivotally connect the first side wall portion to the bottom wall constituent portion are provided on sides of a lower portion of one of the first member and the second member; an outer peripheral surface of the pivot shaft portion is disposed at a distance from a lower outer peripheral edge of the connecting surface to which the pivot shaft portion is connected to an inner peripheral side of the outer peripheral edge of the connecting surface; A container characterized in that a plurality of radial ribs are provided, extending in a substantially centrifugal direction from the outer peripheral surface of the base side portion of the pivot shaft portion that connects to the connecting surface, and connecting between the outer peripheral surface of the pivot shaft portion and the connecting surface.

[0008] According to the first aspect, the pivot shaft is provided on one of the first member and the second member. Therefore, it is possible to avoid a situation in which unnecessary irregularities are formed on the pivot shaft, which would hinder the pivotal displacement of the side wall, as occurs when the pivot shaft is formed by combining a portion formed by the first member with a portion formed by the second member. Furthermore, compared to a case in which almost the entire first side wall, including the pivot shaft, is integrally formed to form an internal space, it is possible to improve the molding accuracy of the pivot shaft. Therefore, it is possible to improve the rotatability of the side wall.

[0009] In addition, the radial ribs connecting the base of the pivot shaft to the connecting surface reinforce the pivot shaft, preventing damage to the pivot shaft even if the pivot shaft has a relatively simple and straightforward configuration.

[0010] Means 2: 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 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 pair of pivot shafts that pivotally connect the side wall portions to the bottom wall component are provided on connecting surfaces of the side portions of the side wall portions, A container characterized in that a plurality of radial ribs are provided on the outer peripheral surface of the rotating shaft portion, extending in a substantially centrifugal direction of the rotating shaft portion.

[0011] According to Means 2, the rotating shaft can be reinforced by radial ribs connecting the base of the rotating shaft to the connecting surface, and damage to the rotating shaft can be prevented even if the rotating shaft has a relatively simple and straightforward configuration.

[0012] Means 3. A rotation reinforcement rib is provided that protrudes laterally from the outer peripheral edge of the connecting surface, The container according to means 1 or 2, characterized in that the radial ribs connect the rotation shaft portion and the rotation reinforcement ribs.

[0013] According to the third measure, the lower part of the connecting surface can be reinforced, and even if the part is configured to be in sliding contact with the bottom wall component, durability can be improved. In addition, the rotation shaft can be further reinforced. [Brief explanation of the drawings]

[0014] [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 showing the periphery of the short-side shaft protrusion of the short-side side wall portion. [Figure 10] 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 11] 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 12] 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 13] 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 14] FIG. 10 is a partially enlarged perspective view showing the periphery of a long-side shaft protrusion of a long-side side wall portion. [Figure 15] 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 16] 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 17] FIG. 10 is a perspective view showing the back side (long side internal space side) of the long side inner surface constituent part. [Figure 18]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 19] FIG. 10 is a partially enlarged perspective view including a partial cross section showing the underside of the bottom wall base component. [Figure 20] FIG. 2 is a partially enlarged perspective view including a partial cross section of a bottom wall lower surface component. [Figure 21] FIG. 2 is a partially enlarged perspective view of a bottom wall lower surface component. [Figure 22] 1 is a partially enlarged vertical cross-sectional view showing the short-side side wall portion and short-side base portion of the container body in an assembled state. [Figure 23] FIG. 2 is a partially enlarged horizontal cross-sectional view of the container body in an assembled state. [Figure 24] 10 is a partially enlarged vertical cross-sectional view showing the long-side side wall portion and the long-side base portion of the container body in an assembled state. FIG. [Figure 25] 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 26] 7 is a partially enlarged cross-sectional view (cross-sectional view taken along line AA in FIG. 6) of the container with the lid body placed on the folded container body. DETAILED DESCRIPTION OF THE INVENTION

[0015] 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, 18, 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.

[0016] 7 and 18, 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. 18, the formation position of the short-side bearing portion 74 for rotatably supporting the short-side sidewall portion 8 is also located higher than the formation position of the long-side bearing portion 83 for rotatably supporting the long-side sidewall portion 9. Furthermore, as shown in FIGS. 2, 7, etc., the lateral width of the short-side sidewall portion 8 is configured to be approximately the same as the transverse width of the bottom wall forming portion 4, and the lateral 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. Therefore, in this embodiment, when the assembled container body 2 is folded, the pair of long-side sidewall portions 9 are first displaced to the folded position by overlapping them over the bottom wall portion 5, and then the short-side sidewall portion 8 is displaced to the folded position by overlapping them over the long-side sidewall portion 9.

[0017] 7, 8, 11, 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 that forms a short-side internal space 12 (see FIGS. 22 and 23) between itself 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 polypropylene.

[0018] As shown in Figures 8 and 10, the short-side base component 11 includes an upper wall 16 having a generally rectangular shape when viewed from the front, an extension 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 extension wall 17. The short-side outer base wall 15 includes a generally rectangular frame-shaped 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 lower wall 18 of the short-side frame wall 19. The short side frame wall portion 19 is provided with a pair of short side shaft protrusions 20 (rotating shaft portions) that protrude laterally from the lower part of the outer surface of the portion corresponding to the left and right side edge portions of the upper wall portion 16 toward the side of the short side base component portion 11, inner surface adjustment portions 21 that extend laterally from the inner edge of the container body 2 at the portion corresponding to the left and right side edge portions of the upper wall portion 16 of the short side frame wall portion 19, and locking components 22 that protrude inward from the side edge portions of each inner surface adjustment portion 21 toward the inside of the container body 2.

[0019] 10, 22, and 23, 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 its inner portion on the container body 2. More specifically, the short-side frame wall 19 has a short-side inner leading edge wall 23a and a short-side outer leading edge wall 23b that face each other and are spaced apart from each other in the inner and outer circumferential directions of the short-side frame wall 19, and a short-side insertion space 23c that opens toward the inside of the container body 2 is formed between the short-side inner leading edge wall 23a and the short-side outer leading edge wall 23b. Furthermore, the inner edge of the short-side inner leading edge wall 23a of the container body 2 extends continuously around the entire periphery at the same position in the thickness direction of the short-side side wall 8. As shown in Figures 10 and 23, the portion of the short side outer tip wall portion 23b corresponding to the side edge portion of the short side frame wall portion 19 protrudes more inwardly of the container body 2 than other portions of the short side outer tip wall portion 23b, but the inner portion of the container body 2 has a step portion that protrudes laterally in the width direction of the short side base component 11, and this step portion is located at the same position in the thickness direction of the short side side wall portion 8 as the inner edge of the container body 2 of the other portions of the short side outer tip wall portion 23b.

[0020] As shown in Figures 8, 10, etc., the locking component 22 includes a locking wall portion 24 having an approximately rectangular plate shape that protrudes inward from the side edge of each inner surface adjustment portion 21 and extends in the height direction of the short side side wall portion 8, and a locking hole portion 25 that opens toward the center of the width direction of the short side side wall portion 8 of the locking wall portion 24.

[0021] As shown in Fig. 11 , the short-side inner surface forming portion 13 includes a short-side inner surface base wall portion 27 that is generally rectangular in front view, and a short-side orthogonal wall portion 28 that is generally square-frame shaped and extends 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. 12 , a short-side insertion 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 outer peripheral side of the short-side orthogonal wall portion 28. Then, as shown in Figs. 22 and 23 , the short-side insertion tip wall portion 29 of the short-side inner surface forming portion 13 is inserted (press-fitted) into the short-side insertion space 23c of the short-side base forming portion 11, whereby the short-side inner tip wall portion 23a and the short-side outer tip wall portion 23b are fitted to the short-side insertion tip wall portion 29. The short-side inner tip wall 23a and the short-side outer tip wall 23b are fitted with the short-side insertion tip wall 29, thereby engaging the short-side frame wall 19 with the short-side orthogonal wall 28, and thus assembling the short-side base constituent part 11 and the short-side inner surface constituent part 13. Furthermore, a heat insulating member 10 made of foamed polyurethane is provided in the short-side internal space 12 formed between the short-side base constituent part 11 and the short-side inner surface constituent part 13.

[0022] In this embodiment, the entire surfaces of the short-side base constituent portion 11 and the short-side inner surface constituent portion 13 that define the short-side internal space 12 are subjected to an activation surface treatment to impart reactive activity for bonding to the thermal insulation member 10. Examples of activation surface treatments include flame treatment, corona discharge treatment, plasma treatment, ultraviolet irradiation treatment, and primer treatment. By performing these treatments, the surface of the polyolefin-based resin, which originally has low activity, can be made into a highly active surface with exposed active groups and dangling bonds (unbonded atomic hands). The short-side base constituent portion 11 and the short-side inner surface constituent portion 13 that have been subjected to the activation surface treatment are assembled, and a raw material liquid of the thermal insulation member 10 (in this example, uncured polyurethane-based resin) is injected into the short-side internal space 12 and solidified to form the thermal insulation member 10. To prevent deformation of the short-side base constituent parts 11 and the short-side inner surface constituent parts 13 due to foaming of the polyurethane foam, the assembled short-side base constituent parts 11 and the short-side inner surface constituent parts 13 are set in a mold, and then a raw material liquid is poured into the short-side inner space 12. Furthermore, since the surfaces defining the short-side inner space 12 have been subjected to the above-mentioned activated surface treatment, the short-side base constituent parts 11 and the short-side inner surface constituent parts 13 are strongly bonded to the insulating member 10. The insulating member 10 is also provided in a similar manner on the long-side side wall parts 9 and the bottom wall constituent part 4, which will be described later. Although the activated surface treatment is not performed on the lid body 3, the raw material liquid for the insulating member 10 is poured into it and solidified. In addition, injection ports 30a for injecting the raw material liquid of the heat insulating member 10 into the short-side side wall portion 8, the long-side side wall portion 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 30b attached to the injection ports 30a do not protrude from the mounting surface. As shown in Figures 1 and 8, injection port 30a of short-side side wall portion 8 is provided on one side of short-side frame wall portion 19.

[0023] 13 and 17, each long side side wall portion 9 as a first side wall portion includes a long side base constituent portion 31 as a second member that constitutes most of the long side side wall portion 9 including the outer region thereof, and a long side inner surface constituent portion 33 as a first member that forms a long side internal space 32 (see FIGS. 23 and 24) between itself 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 polypropylene.

[0024] As shown in Figures 13, 15, 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, auxiliary protrusions 37 that protrude downward from multiple points on the lower edge of the long side frame wall 36, and a pair of long side shaft protrusions 38 that serve as pivot shafts that protrude laterally from the long side base component 31 from the auxiliary protrusions 37 provided on both sides of the lower edge of the long side frame wall 36.

[0025] 15, 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 (inner edge) of the upper edge of the long-side frame wall 36 toward the container body 2, and a replacement wall 40 extends from the lower edge of the folded wall 39 toward 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. 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, form a substantially rectangular frame-shaped wall (hereinafter referred to as the "long-side base mating wall 41").

[0026] 15, 16, 23, and 24, in this embodiment, the portion of the long-side base-side mating wall 41 that is on the inner side of the container body 2 has a double-wall structure in the inner and outer circumferential directions of the long-side frame wall 36. More specifically, the long-side base-side mating wall 41 has a long-side inner tip wall 42a and a long-side outer tip wall 42b that are spaced apart and face each other in the inner and outer circumferential directions of the long-side base-side mating wall 41, and a long-side insertion space 42c that opens to the inner side of the container body 2 is formed between the long-side inner tip wall 42a and the long-side outer tip wall 42b.

[0027] 15, 16, and 24, the lower edge of the long-side frame wall 36 includes a long-side frame lower extending wall 43 extending from the long-side outer base wall 35 toward the inside of the container body 2, and a long-side frame lower vertical wall 44 extending downward from the tip edge of the long-side frame lower extending wall 43, and the long-side inner tip wall 42a and the long-side outer tip wall 42b extend toward the inside of the container body 2 from the lower part of the long-side frame lower vertical wall 44. Furthermore, as shown in Fig. 15, the inner edge of the long-side inner tip wall 42a of the container body 2 extends continuously around the entire periphery of the long-side base mating wall 41 at the same position in the thickness direction of the long-side side wall 9. In contrast, the portion of the long-side outer tip wall 42b corresponding to the lower side of the long-side frame wall 36 protrudes further inwardly of the container body 2 than the other portions of the long-side outer tip wall 42b, and also protrudes further inwardly of the container body 2 than the long-side inner tip wall 42a (with respect to the other portions of the long-side outer tip wall 42b, the long-side inner tip wall 42a protrudes further inwardly of the container body 2). The auxiliary protrusion 37 is provided to protrude downwardly from the long-side outer tip wall 42b.

[0028] 7 and 13, both sides on the outer surface of the long side outer base wall portion 35 are provided with locked components 45 that substantially abut and lock with 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 so that corresponding portions of the long side outer base wall portion 35 are recessed toward the inside of the container body 2, and locking projections 47 that protrude from the locked wall portions 46 toward the outside of the container body 2.

[0029] 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.

[0030] 17, the long side inner surface forming portion 33 includes a long side inner surface base wall portion 49 that is generally rectangular in front view, and a long side orthogonal wall portion 50 that is generally square-frame shaped and extends from the outer peripheral edge of the long side inner surface base wall portion 49 outward from the container body 2. A long side insertion 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. Then, as shown in FIGS. 23 and 24, the long side insertion tip wall portion 51 of the long side inner surface forming portion 33 is inserted (press-fitted) into the long side insertion space 42c of the long side base forming portion 31, whereby the long side inner tip wall portion 42a and the long side outer tip wall portion 42b are fitted to the long side insertion tip wall portion 51. By fitting the long side inner tip wall portion 42a and the long side outer tip wall portion 42b with the long side insertion tip wall portion 51, the long side base mating wall portion 41 and the long side orthogonal wall portion 50 are engaged with each other, and thus the long side base constituent portion 31 and the long side inner surface constituent portion 33 are assembled together. Furthermore, a heat insulating member 10 made of foamed polyurethane is provided in the long side internal space 32 formed between the long side base constituent portion 31 and the long side inner surface constituent portion 33. In addition, as shown in FIGS. 2 and 17, the injection port 30a of the long side side wall portion 9 is provided below the center in the width direction of the long side inner surface constituent portion 33 (long side inner base wall portion 49).

[0031] 18 to 21, the bottom wall constituent part 4 includes a bottom wall base constituent part 61 (bottom wall second member) that constitutes most of the bottom wall constituent part 4, including its upper portion, and a bottom wall lower surface constituent part 63 (bottom wall first member) that constitutes the lower surface of the bottom wall part 5 and defines a bottom wall internal space 62 (see FIGS. 22 and 24) 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 polypropylene. As shown in FIG. 18, the bottom wall base constituent part 61 includes a bottom wall upper surface base wall part 64 that constitutes the upper surface (the placement portion on which contents are placed) of the bottom wall part 5, which has a substantially rectangular shape in a 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.

[0032] The short-side base 6 includes a short-side base inner lower vertical wall 66 extending upward from the short-side edge of the bottom wall upper surface base wall 64, a short-side base middle wall 67 extending from the upper edge of the short-side base inner lower vertical wall 66 to the outside of the container body 2, a short-side base inner upper vertical wall 68 extending upward from the edge of the short-side base middle wall 67 on the outside of the container body 2, and a short-side base axis wall 69 extending upward from both side edges of the short-side base middle wall 67, and It is equipped with a short side base upper wall portion 70 extending outward from the upper edge of the wall portion 69 to the outside of the container body 2, 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 outside 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.

[0033] In this embodiment, the short-side bearing portions 74 are provided at the bottom of each short-side base shaft wall portion 69. As shown in FIG. 25 , the substantially cylindrical short-side shaft protrusions 20 are inserted into the short-side bearing portions 74 and are substantially 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. 18 and 25 , the short-side shaft guide groove portions 75 are provided in the short-side base shaft wall portion 69, extending substantially vertically from a position slightly above the short-side bearing portions 74 to the upper edge of the short-side base shaft wall portion 69. In addition, in order to make it easier to insert the short side shaft protrusion 20 into the short side bearing portion 74 when attaching the short side side wall portion 8 to the bottom wall component 4, an inclined portion is provided in the lower portion of the short side shaft protrusion 20 when the short side side wall portion 8 is in an upright position.

[0034] As shown in Figure 18, 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.

[0035] 18, 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, into which the auxiliary protrusions 37 of the long side side wall portion 9 can be inserted (see FIG. 24). The rotation-permitting recesses 82 are provided at both ends of the long side base portion 7, and also at multiple locations in the longitudinal middle position of the long side base portion 7 corresponding to the auxiliary protrusions 37. In this embodiment, in the areas corresponding to the rotation-permitting recesses 82, the upper vertical wall portion 79 inside the long side base is extended downward and connected to a portion that is flush with the upper surface of the bottom wall upper surface base wall portion 64, and the sides of each rotation-permitting recess 82 (between the middle wall portion 78 of the long side base, the lower vertical wall portion 77 inside the long side base, the portion where the upper vertical wall portion 79 inside the long side base extends downward, and the portion that is flush with the upper surface of the bottom wall upper surface base wall portion 64) are blocked.

[0036] The long-side bearing portions 83 in this embodiment are provided in 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 bearing portions 83 have substantially cylindrical long-side shaft protrusions 38 inserted therein and are substantially fitted to the extent that rotation of the long-side shaft protrusions 38 is permitted. This allows the long-side side wall portion 9 to be rotatably connected (axially supported) to the short-side base portion 6. Particularly in this embodiment, the long-side bearing portions 83 are provided from the lower edge portion to the upper edge portion of the short-side base inner lower vertical wall portion 66. That is, when the long-side sidewall portions 9 are in the folded position (while 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 the folded long-side sidewall portions 9 can be stacked one on top of the other (see FIG. 7 ) within the range in which the long-side shaft protrusions 38 are inserted into the long-side bearing portions 83. As shown in FIG. 18 , a stopper 83a is provided at the top of the groove-shaped long-side bearing portion 83 extending in the vertical direction, protruding from the inner surface of the long-side bearing portion 83 toward the inside of the container body 2 (toward the long-side base portion 7). The upper surface of the stopper 83a is inclined to allow the long-side shaft protrusions 38 to be inserted relatively smoothly into the long-side bearing portion 83, and the lower surface of the stopper 83a forms an angle that is close to perpendicular to the inner surface of the long-side bearing portion 83 (the lower vertical wall portion 66 in the short-side base). The provision of the stopper 83a prevents the long-side shaft protrusion 38 from falling off the long-side bearing portion 83 due to the lower side of the long-side sidewall 9 being tilted too far to the right or left when the long-side sidewall 9 is in the folded position. The stopper 83a does not protrude outside the long-side bearing portion 83 (it does not protrude further inward into the container body 2 than the short-side base lower vertical wall portion 66). Additionally, in order to make it easier to insert the long-side shaft protrusion 38 into the long-side bearing portion 82 when attaching the long-side sidewall 9 to the bottom wall constituent portion 4, an inclined portion is provided in the lower portion of the long-side shaft protrusion 38 when the long-side sidewall 9 is in the upright position.

[0037] 19 and other figures, 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. More specifically, the short-side base outer vertical wall portion 71 and the long-side base outer vertical wall portion 81 have a bottom wall inner end wall portion 84a and a bottom wall outer end wall portion 84b that are spaced apart and face each other in the inner and outer periphery directions of the short-side base outer vertical wall portion 71 and the long-side base outer vertical wall portion 81, and a bottom wall insertion space 84c that opens downward is formed between the bottom wall inner end wall portion 84a and the bottom wall outer end wall portion 84b. In this embodiment, the short-side base outer vertical wall portion 71 and the long-side base outer vertical wall portion 81 form a second mating wall portion having a substantially rectangular frame shape.

[0038] As shown in Figures 20 and 21, the bottom wall lower surface forming portion 63 includes a bottom wall lower surface base wall portion 86 having a generally rectangular shape in bottom view, 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 Figures 4 and 20, the outer periphery of the bottom wall lower surface base wall portion 86 has a downwardly protruding convex shape, 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 lower ends of the convex shape and the lower ends of the ribs form grounding portions that come into contact with the installation surface, such as the floor, on which the container is placed). 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 upward generally vertically across a curved portion.

[0039] 20, 21, etc., a bottom wall insertion tip wall portion 88 is provided in an upper portion of the bottom wall orthogonal wall portion 87, which 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 22, 24, etc., by inserting (press-fitting) the bottom wall insertion tip wall portion 88 of the bottom wall lower surface forming portion 63 into the bottom wall insertion space 84c of the bottom wall base forming portion 61, the bottom wall inner tip wall portion 84a and the bottom wall outer tip wall portion 84b are fitted with the bottom wall insertion tip wall portion 88. By fitting the bottom wall inner tip wall portion 84a and the bottom wall outer tip wall portion 84b with the bottom wall insertion tip wall portion 88, the short-side base outer vertical wall portion 71 and the long-side base outer vertical wall portion 81 are engaged with the bottom wall orthogonal wall portion 87, and thus the bottom wall base constituent portion 61 and the bottom wall undersurface constituent portion 63 are assembled together. Furthermore, a heat insulating member 10 made of foamed polyurethane is provided in the bottom wall internal space 62 formed between the bottom wall base constituent portion 61 and the bottom wall undersurface constituent portion 63. In addition, as shown in FIG. 1, the injection port 30a of the bottom wall constituent portion 4 is provided in the longitudinal center of one long side of the bottom wall orthogonal wall portion 87 of the bottom wall undersurface constituent portion 63.

[0040] As shown in FIGS. 1 and 5, the lid 3 is configured to be able to close the top opening 91 (see FIG. 2) of the container body 2 in an assembled state. The lid body 92, which constitutes the outer shape of the lid 3 of this embodiment, is integrally formed from polypropylene by blow (hollow) molding, so that the lid internal space 93 (see FIG. 26) is formed. In this embodiment, a heat insulating member 10 made of foamed polyurethane is provided in the lid internal space 93. In addition, as shown in FIG. 5, the injection port 30a of the lid 3 is provided in a position on the underside, at the center in the short width direction, and closer to one of the short side edges than the center in the long width direction.

[0041] As shown in Figures 22 and 23, in this embodiment, when the container body 2 is assembled, the outer surface side of the portion of the short side side wall portion 8 whose thickness is defined by the lower wall portion 18 of the short side base component 11 and the short side inner surface component 13, and the inner surface side of the portion of the short side base portion 6 whose thickness is defined by the short side base inner upper vertical wall portion 68 and the short side base outer vertical wall portion 71 are configured to face each other horizontally (inside and outside the container body 2). 23, in the assembled state of the container body 2, the insulating members 10 of the short-side sidewall portions 8 and the long-side sidewall portions 9 are arranged on the inside of the container body 2 of the short-side shaft protrusions 20 and the short-side bearing portions 74, with the insulating member 10 of the lid 3 arranged above and the insulating member 10 of the bottom wall constituent portion 4 arranged below (see FIG. 25). Furthermore, as shown in FIG. 23, in the width direction of the long-side sidewall portions 9, the portions (side surfaces) of the long-side sidewall portions 9 where the insulating member 10 is located and the portions (inner surfaces) of the short-side sidewall portions 8 where the insulating member 10 is located are configured to be close to (or abut) (with almost no gap) each other.

[0042] 24, with respect to the long-side side wall portions 9, when the container body 2 is assembled, the outer surface of the long-side frame lower vertical wall portion 44 faces the inner surface of the long-side base inner upper vertical wall portion 79 of the long-side base portion 7. Furthermore, on the outer side of the container body 2 of the auxiliary protrusions 37 of the long-side side wall portions 9, a portion in which the heat insulating member 10 of the long-side base portion 7 is housed is arranged. In addition, as shown in FIG. 18, on the outer side of the container body 2 of the long-side shaft protrusions 38 and the long-side bearing portions 83, the bottom wall constituent portion 4 (short-side base portion 6) in which the heat insulating member 10 is housed is arranged, and further, the heat insulating member 10 of the short-side side wall portions 8 and the heat insulating member 10 of the bottom wall constituent portion 4 are also arranged above and below.

[0043] 3, 18, 22, etc., a base-side engaging portion 103 is provided on the inner surface of each short-side base portion 6, protruding from the short-side base inner upper vertical wall portion 68 toward the inside of the container body 2. The base-side engaging 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. Furthermore, the base-side engaging portions 103 are projecting pieces whose longitudinal direction is the up-down direction, and their upper edge portion (upper surface) is flush with the upper surface of the short-side base upper wall portion 70, and their lower edge portion is spaced above the short-side base middle wall portion 67.

[0044] 3, 8, 22, etc., the lower wall portion 18 on the outer surface of the short-side side wall portion 8 is provided with two recessed sidewall-side engaging portions 104 into which a pair of left and right base-side engaging portions 103 can be inserted, corresponding to the two pairs of base-side engaging portions 103 provided at the two locations. Also, at 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 insulating member 10, and a heat insulating member 10 is provided. Furthermore, the upper edge of the sidewall-side engaging portion 104 is flush with the lower surface of the extending wall portion 17.

[0045] 22 and 23, by placing the short-side side wall portions 8 in an upright position (when the container body 2 is in an assembled state), a set of two base-side engaging portions 103 are inserted into each side-wall-side engaging portion 104, and the side-wall-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. Furthermore, when the container body 2 is in an assembled state, the side-wall-side engaging portions 104 and the base-side 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.

[0046] Furthermore, when the container body 2 is assembled, (almost) the entire base side engagement portion 103 is accommodated inside the side wall side engagement 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 side base portion 6 are in contact with or close to each other.

[0047] In addition, when only the short-side sidewalls 8 are brought into an upright position (the position shown in FIG. 7) during the process of assembling the container body 2 in the folded state, the lower surfaces of the extension walls 17 and the upper edges of the sidewall engaging portions 104 are supported by contacting the upper surfaces of the short-side base upper wall portions 70 of the short-side base portions 6 and the upper edges (upper surfaces) of the base engaging portions 103 (see FIGS. 18 and 22). This allows the short-side sidewalls 8 to maintain their upright position (to stand on their own) even if the worker is not holding the upright short-side sidewalls 8.

[0048] 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. 26, 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.

[0049] 1 and other figures, the upper wall 16 of each short-side side wall 8 is provided with a handle 107 at a position below the upper edge of the upper wall 16 to allow an operator to easily place his or her hand on the upper wall 16 when lifting the assembled container body 2 (container 1). Furthermore, as shown in FIGS. 1 and 2, the upper wall 16 of each short-side side wall 8 is provided with a handle 108 that is recessed and extends 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 placing a fingertip on the underside of the lid 3 via the handle 108 when removing the lid 3 from the container body 2.

[0050] As shown in Figure 15, etc., the lower edge portion of the long side frame wall portion 36 (long side base side mating wall portion 41) of the long side base component 31 has a long side outer tip wall portion 42b as an extension portion, and as shown in Figure 24, the long side outer tip wall portion 42b extends below the lower edge portion of the long side orthogonal wall portion 50 of the long side inner surface component 33 (when the long side side wall portion 9 is in an upright position) and is positioned below the lower edge portion of the long side orthogonal wall portion 50.

[0051] 14, 15, 24, etc., each auxiliary protrusion 37 protrudes downward from the long-side outer tip wall portion 42b (in this embodiment, including the lower edge portion of the long-side frame lower vertical wall portion 44 that is flush with the lower surface of the long-side outer tip wall portion 42b, and the range from this lower edge portion to the inner edge of the container body 2 of the long-side outer tip wall portion 42b). Furthermore, each auxiliary protrusion 37 is curved along the rotation direction of the long-side shaft protrusion 38 and has a curved portion 37a that can slide against the bottom wall component 4 (the bottom surface of the rotation-permitting recess 82 formed in the long-side base portion 7, which is flush with the upper surface of the bottom wall portion 5 (bottom wall upper surface base wall portion 64)). The auxiliary protrusion 37 in this embodiment has a substantially semicircular shape with a curved bottom when the long-side base component 31 is viewed from the side (side edge side).

[0052] 13, the auxiliary protrusions 37 are provided at seven locations spaced a predetermined distance apart in the width direction of the long-side side wall portion 9. Furthermore, auxiliary connecting portions 37b are provided to connect the side surfaces of the auxiliary protrusions 37 at both ends, each provided with a pair of long-side shaft protrusions 38, to the adjacent auxiliary protrusion 37 (the second from the end) along the curved portion 37a (within a range of approximately 45 degrees on the inward side of the container body 2). Also, as shown in FIG. 18, the rotation-permitting recess 82 provided between the long-side base middle wall portion 78 of the long-side base portion 7 and the long-side base inner lower vertical wall portion 77 has a shape that allows the auxiliary connecting portions 37b to be inserted.

[0053] As shown in Figure 24, in this embodiment, the upper vertical wall portion 79 of the long side base is extended downward in the rotation-permitting recess 82 and connected to a portion that is flush with the upper surface of the bottom wall upper surface base wall portion 64, and at this connected portion, the cross-sectional shape is a curved shape that follows the curved portion 37a of the auxiliary protrusion 37.

[0054] 24 , a bottom wall internal space 62 formed in the long side base portion 7 and provided with a heat insulating member 10 is disposed on the horizontal side of the container body 2 at the lower side of the long side orthogonal wall portion 50 of the long side inner surface constituent portion 33 of the long side side wall portion 9 in the upright position, and at the outer side of the container body 2 at the long side outer tip wall portion 42b of the long side base constituent portion 31. That is, the lower side of the long side orthogonal wall portion 50 and the long side outer tip wall portion 42b are disposed on the inner side of the container body 2 with respect to the long side base inner upper vertical wall portion 79 of the long side base portion 7, and the heat insulating member 10 is also provided in the area of ​​the bottom wall internal space 62 defined by the long side base inner upper vertical wall portion 79, the long side base upper wall portion 80, and the long side base outer vertical wall portion 81. This ensures that the heat insulating member 10 of the bottom wall forming portion 4 (long side base portion 7) is positioned on the outer side of the container body 2 of the auxiliary protrusion 37, as described above.

[0055] 13 and 24 , a corresponding recess 48 is provided on the lower part of the outer surface of the long-side side wall 9 (long-side base component 31). The corresponding recess 48 is made up of a long-side frame lower extension wall 43 and a long-side frame lower vertical wall 44 and opens outward and downward from the container body 2. When the container body 2 is assembled, the downward-facing lower edge of the corresponding recess 48 (the lower surface of the long-side frame lower extension wall 43) is configured to abut against or be close to the upper surface of the long-side base upper wall 80 of the long-side base 7. Furthermore, when the container body 2 is assembled, each auxiliary protrusion 37 is inserted into the corresponding rotation-permitting recess 82, and the lower surface of the long-side outer tip wall 42b is configured to abut against or be close to the upper surface of the long-side base middle wall 78 of the long-side base 7. In this embodiment, when the container body 2 is assembled, at least one of the long side frame lower extension wall portion 43 and the long side outer tip wall portion 42b is configured to be supported by contacting the corresponding long side base upper wall portion 80 and long side base middle wall portion 78. Also, in this embodiment, the long side base middle wall portion 78 of the long side base portion 7 and the long side base inner lower vertical wall portion 77 form block protrusions, and each block protrusion defined by the rotation allowing recess 82 is configured to be received between (the gaps between) the auxiliary protrusions 37.

[0056] The outer peripheral surface of the long-side shaft protrusion 38 is disposed at a distance closer to the inner peripheral side of the auxiliary protrusion 37 than the lower outer peripheral edge of the auxiliary protrusion 37. In the present embodiment, in a side view of the long-side side wall portion 9, the outer peripheral edge of the long-side shaft protrusion 38 and the lower outer peripheral edge of the auxiliary protrusion 37 are configured to be substantially concentric circles (and part of the auxiliary protrusion 37).

[0057] 14, a rotation reinforcement rib 111 is provided that protrudes laterally from the outer peripheral edge of the auxiliary protrusion 37 on which the long-side shaft protrusion 38 is provided, toward the side of the long-side side wall portion 9. The rotation reinforcement rib 111 of this embodiment includes an upper side portion 112 that extends substantially horizontally to match the substantially semicircular auxiliary protrusion 37, and a curved corresponding portion 113 that curves so as to be convex downward, and the long-side shaft protrusion 38 is connected to the center of the upper side portion 112.

[0058] Furthermore, a plurality of radial ribs 114 are provided which extend in a substantially centrifugal direction from the outer peripheral surface of a base-side portion of the long-side shaft protrusion 38 that connects with the auxiliary protrusion 37, and which connect the outer peripheral surface of the long-side shaft protrusion 38, the inner peripheral surface of the curved corresponding portion 113 of the rotation reinforcement rib 111, and the side surface (connecting surface) of the auxiliary protrusion 37. The radial ribs 114 of this embodiment include those which hang down from the long-side shaft protrusion 38 and those which incline downward from the long-side shaft protrusion 38 toward the outside of the container body 2. In addition, the leading edge of the radial rib 114 in the direction of protrusion from the auxiliary protrusion 37 is provided on the same plane as the leading edge of the rotation reinforcement rib 111 in the direction of protrusion from the auxiliary protrusion 37.

[0059] Furthermore, in the width direction of the long side side wall portion 9, the side edge portions (tips protruding from the auxiliary protrusion 37) of the pivotal reinforcement rib 111 and the radial ribs 114 are arranged on the same plane as the outer surface of the side portion of the long side frame wall portion 36 (long side base side mating wall portion 41), and the long side shaft protrusion 38 protrudes laterally beyond the side portion of the long side frame wall portion 36 (long side base side mating wall portion 41).

[0060] 9, the outer peripheral surface of the short-side shaft protrusion 20 is disposed at a distance inward from the outer peripheral edge of the lower part of the side edge of the short-side frame wall 19 of the short-side base component 11. Also, a short-side rotation reinforcement rib 116 is provided, protruding from the outer peripheral edge of the lower part of the side edge of the short-side frame wall 19 toward the side of the short-side side wall 8. Furthermore, a plurality of short-side radial ribs 117 are provided, extending in a substantially centrifugal direction from the outer peripheral surface of a base-side portion of the short-side shaft protrusion 20 that connects with the short-side frame wall 19, and connecting the outer peripheral surface of the short-side shaft protrusion 20, the inner peripheral surface of the short-side rotation reinforcement rib 116, and the side surface (connecting surface) of the short-side frame wall 19. In this embodiment, the short-side radial ribs 117 include those that extend outward from the short-side shaft protrusions 20 of the container body 2 in the horizontal direction, those that extend inward from the container body 2, and those that extend downward and upward from the short-side shaft protrusions 20 in the vertical direction. In addition, the leading edges of the short-side radial ribs 117 in the direction of protrusion from the short-side frame wall portions 19 are provided on the same plane as the leading edges of the short-side rotation reinforcement ribs 116 in the direction of protrusion from the short-side frame wall portions 19. The short-side shaft protrusions 20 protrude laterally beyond the side edges of the short-side rotation reinforcement ribs 116 and the short-side radial ribs 117 (leading edges in the direction of protrusion from the side edges of the short-side frame wall portions 19).

[0061] As described above, according to this embodiment, the long-side shaft protrusions 38 are provided on the auxiliary protrusions 37 of the long-side base constituent parts 31. This prevents unnecessary irregularities from being formed on the long-side shaft protrusions 38, which would hinder the rotational displacement of the long-side sidewall parts 9, as would occur, for example, when the long-side shaft protrusions 38 are formed by combining a portion formed by the long-side base constituent parts 31 with a portion formed by the long-side inner surface constituent parts 33. Furthermore, compared to a case where almost the entire long-side sidewall parts 9, including the long-side shaft protrusions 38, are integrally formed to form the long-side internal space 32, the molding accuracy of the long-side shaft protrusions 38 can be improved. Therefore, the rotational mobility of the long-side sidewall parts 9 can be improved. Furthermore, because the short-side shaft protrusions 20 are also formed only by the short-side base constituent parts 11, the short-side shaft protrusions 20 can be formed in a suitable shape, thereby improving the rotational mobility of the short-side sidewall parts 8.

[0062] Furthermore, the auxiliary protrusion 37 on which the long-side shaft protrusion 38 is provided is provided on the lower edge portion of the long-side base constituent portion 31 (long-side frame wall portion 36, long-side base-side mating wall portion 41) that extends below the lower edge portion of the long-side inner surface constituent portion 33 (long-side orthogonal wall portion 50) and includes the range of the long-side outer tip wall portion 42b (extension portion) located below the lower edge portion of the long-side orthogonal wall portion 50. This allows for relatively free determination of the position of the long-side shaft protrusion 38 in the thickness direction of the long-side sidewall portion 9. Therefore, the auxiliary protrusion 37 and the long-side shaft protrusion 38 are disposed on the inner side of the container body 2, and the bottom wall internal space 62 of the bottom wall constituent portion 4 can be disposed (secured) on the outer side of the container body 2 of the auxiliary protrusion 37 and the long-side shaft protrusion 38. In this embodiment, the heat insulating member 10 is also provided in the bottom wall internal space 62. That is, the auxiliary protrusions 37 and the long side shaft protrusions 38 protruding downward from the lower edge (long side outer tip wall 42b) of the long side frame wall 36 (long side base mating wall 41) are not provided with the long side internal space 32, nor are the insulating members 10 provided thereon. However, when the long side sidewall 9 is in an upright position, the insulating members 10 of the bottom wall internal space 62 of the bottom wall constituent part 4 are arranged on the outer side of the container body 2 of the auxiliary protrusions 37 and the long side shaft protrusions 38. This prevents a decrease in insulating properties around the lower edge of the long side sidewall 9. Therefore, a decrease in insulating properties due to the provision of the auxiliary protrusions 37 and the long side shaft protrusions 38 is avoided, and the cold and warm insulation properties of the container 1 can be improved. Furthermore, when the thickness of the long side side wall portion 9 is relatively thin (thinner than the thickness of the short side side wall portion 8), the effect of positioning the auxiliary protrusion 37 and the long side shaft protrusion 38 on the inner side of the container body 2 and securing the bottom wall internal space 62 of the bottom wall component portion 4 on the outer side of the container body 2 of the auxiliary protrusion 37 and the long side shaft protrusion 38 is more pronounced.

[0063] Furthermore, the curved portions 37a of the auxiliary protrusions 37 assist the rotational movement of the lower portions of the long-side side wall portions 9, further improving the rotational ease of the long-side side wall portions 9. Furthermore, the lower portions of the long-side base constituent portion 31 (long-side frame wall portion 36, long-side base mating wall portion 41) and the long-side inner surface constituent portion 33 (long-side orthogonal wall portion 50) can themselves be straight, which allows the lower portions of the long-side frame wall portion 36 and the long-side orthogonal wall portion 50 to be preferably butted together (abutted or brought into close proximity) compared to when the lower portions of the long-side frame wall portion 36 (long-side base mating wall portion 41) and the long-side orthogonal wall portion 50 themselves are curved. In particular, when the edges of the long-side base mating wall portion 41 and the long-side orthogonal wall portion 50 are configured to engage with each other, this configuration can be preferably provided.

[0064] Furthermore, when the edges of the long side base component 31 (long side base mating wall 41) and the long side inner surface component 33 (long side orthogonal wall 50) are engaged with each other, and polyurethane resin raw material is injected into the long side internal space 32 and foamed and solidified to provide the insulating member 10, if the raw material leaks out of the long side side wall 9 from the lower edge portions of the long side base component 31 and the long side inner surface component 33, there is a concern that this will have an adverse effect on the rotational movement of the long side side wall 9, and it may be difficult to remove the insulating member 10 that has leaked out and solidified. In this regard, the long side outer tip wall portion 42b of the lower edge portion of the long side base side mating wall portion 41 is extended to a position below the long side orthogonal wall portion 50, and the lower edge portion of the long side base component 31 (long side base side mating wall portion 41) and the lower edge portion of the long side inner surface component 33 (long side orthogonal wall portion 50) overlap in the vertical direction to form a double wall structure.Therefore, even without joining the lower edge portions of the long side base component 31 and the long side inner surface component 33, it is possible to prevent the raw materials from flowing out of the long side side wall portion 9 from the lower edge portions of the long side base component 31 and the long side inner surface component 33, and the above-mentioned concerns can be eliminated.

[0065] Furthermore, since another auxiliary protrusion 37 is provided between the auxiliary protrusions 37 on which a pair of long side shaft protrusions 38 are respectively provided, the burden on the auxiliary protrusions 37 on which the long side shaft protrusions 38 are provided is reduced, and damage, etc. can be prevented.

[0066] In addition, auxiliary connecting portions 37b are provided to connect auxiliary protrusions 37 provided with long-side shaft protrusions 38 to adjacent auxiliary protrusions 37, thereby preventing deformation of auxiliary protrusions 37 provided with long-side shaft protrusions 38. Furthermore, auxiliary connecting portions 37b are provided along curved portions 37a, which not only reliably reinforces curved portions 37a but also improves the rotatability of long-side side wall portions 9.

[0067] Furthermore, each auxiliary protrusion 37 is inserted into a rotation-permitting recess 82 provided in the long-side base portion 7. In other words, when the container body 2 is assembled, the auxiliary protrusions 37 are configured to receive between them a portion (block protrusion) formed by the long-side base inner lower vertical wall portion 77 and the long-side base middle wall portion 78, which are defined by the rotation-permitting recess 82 in the longitudinal direction of the long-side base portion 7 (the width direction of the long-side side wall portion 9). This prevents relative displacement between the auxiliary protrusions 37 and the bottom wall forming portion 4 in the width direction of the long-side side wall portion 9.

[0068] In addition, when the container body 2 is assembled, at least one of the lower edge portion of the corresponding recess 48 (the lower surface of the long side side frame lower extending wall portion 43) and the lower surface of the long side outer tip wall portion 42b is configured to abut and be supported by the upper surface of the corresponding long side base upper wall portion 80 and the long side base middle wall portion 78, thereby preventing the load of the long side side wall portion 9 from being applied to the auxiliary protrusion 37 when the container body 2 is assembled.

[0069] In addition, a rotation reinforcement rib 111 is provided that protrudes laterally from the outer peripheral edge of the auxiliary protrusion 37 on which the long-side shaft protrusion 38 is provided, toward the side of the long-side side wall portion 9, and radial ribs 114 are provided that extend from the outer peripheral surface of the base side of the long-side shaft protrusion 38 in a substantially centrifugal direction of the long-side shaft protrusion 38, connecting the long-side shaft protrusion 38, the rotation reinforcement rib 111, and the auxiliary protrusion 37. This reinforces the long-side shaft protrusion 38, and prevents damage to the long-side shaft protrusion 38 even though the long-side shaft protrusion 38 has a relatively simple and simplified configuration (only two substantially cylindrical long-side shaft protrusions 38 are provided on each long-side side wall portion 9). Furthermore, the auxiliary protrusion 37 can be reinforced, and durability can be improved even if the auxiliary protrusion 37 is configured to slide against the bottom wall constituent portion 4. In addition, the radial ribs 114 do not protrude further to the side of the long-side side wall portion 9 than the rotation reinforcement ribs 111, making it possible to avoid a situation in which the radial ribs 114 hinder the rotational displacement of the long-side side wall portion 9. The short-side rotation reinforcement ribs 116 corresponding to the short-side shaft protrusions 20 and the short-side radial ribs 117 also achieve the same effects.

[0070] 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.

[0071] (a) In the above embodiment, the lid body 3 is integrally formed as a whole by blow molding, but the lid body 3 may also be formed by connecting multiple components (for example, by assembling an upper component that forms the upper surface of the lid body 3 with a lower component that forms the lower surface of the lid body 3, and providing a heat insulating member 10 in the lid body internal space 93). Furthermore, in the above embodiment, the short side base component 11 and the short side inner surface component 13 are assembled and connected to each other via the heat insulating member 10 provided in the short side internal space 12, but for example, the short side side wall portion 8 may be integrally formed as a whole, 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). However, either the short side wall portion 8 or the long side wall portion 9 is configured by assembling two components and providing a heat insulating member in the internal space formed therein.

[0072] In the above embodiment, when the container body 2 in the folded state is assembled, the short side wall portions 8 are first brought into an upright position and then the long side wall portions 9 are brought into an upright position, but the long side wall portions 9 may be brought into an upright position first. Furthermore, the short side wall portions 8 in the folded position may be vertically overlapped, or the long side wall portions 9 in the folded position may not be vertically overlapped.

[0073] Furthermore, although the above embodiment is embodied in a container 1 having a lid 3, it is also possible to apply the present invention to a container without a lid 3 (for example, a configuration in which container bodies 2 are stacked on top of each other and the upper container body 2 serves as a lid). Furthermore, in the above embodiment, the heat insulating members 10 are provided in the short-side side wall portions 8, the long-side side wall portions 9, the bottom wall component 4, and the short-side internal space 12, the long-side internal space 32, the bottom wall internal space 62, and the lid internal space 93 of the lid 3, but the heat insulating members 10 may be omitted.

[0074] (b) In the above embodiment, the auxiliary protrusion 37 has a substantially semicircular shape in side view (vertical cross section), but it is sufficient that the curved portion 37a is configured to slide against the bottom surface of the rotation-permitting recess 82 (the portion that is flush with the upper surface of the bottom wall 5) while the long-side side wall 9 is displaced between the upright position and the folded position. For example, the curved portion 37a may have a substantially quarter-circular shape that has a portion that substantially abuts against the bottom surface of the rotation-permitting recess 82 when the long-side side wall 9 is in the upright position and when it is in the folded position. Also, a recessed portion may be partially provided in the curved portion 37a.

[0075] Furthermore, in the above embodiment, auxiliary protrusions 37 are provided corresponding to the long-side sidewall portions 9, and long-side shaft protrusions 38 are provided on the auxiliary protrusions 37. However, instead of or in addition to this configuration, auxiliary protrusions may be provided corresponding to the short-side sidewall portions 8, and short-side shaft protrusions 20 may be provided on the auxiliary protrusions. Also, for example, it is possible to omit the rotation-permitting recesses 82 of the long-side base portions 7 and omit the auxiliary protrusions 37 between the auxiliary protrusions 37 on which the long-side shaft protrusions 38 are provided. By providing these, the burden on the auxiliary protrusions 37 on which the long-side shaft protrusions 38 are provided can be reduced, the rotation of the long-side sidewall portions 9 at intermediate positions in the width direction can be improved, and displacement of the long-side sidewall portions 9 in the width direction can be prevented.

[0076] It is also possible to omit any or all of the rotation reinforcement ribs 111, the radial ribs 114, the short side rotation reinforcement ribs 116, and the short side radial ribs 117.

[0077] (c) In the above embodiment, the short side base constituent portion 11, the short side inner surface constituent portion 13, the long side base constituent portion 31, the long side inner surface constituent portion 33, the bottom wall base constituent portion 61, the bottom wall undersurface constituent portion 63, and the lid main body 92 are made of polypropylene. However, they may be made of other polyolefin-based resins (such as polyethylene) or synthetic resins other than polyolefin-based resins (e.g., ABS resin, AES resin, acrylic resin, polycarbonate, etc.). Furthermore, the short side base constituent portion 11 (long side base constituent portion 31, bottom wall base constituent portion 61) and the short side inner surface constituent portion 13 (long side inner surface constituent portion 33, bottom wall undersurface constituent portion 63) may be made of different materials. When this configuration is adopted, both the short side base constituent portion 11 and the short side inner surface constituent portion 13 may be made of polyolefin-based resin, or only one may be made of polyolefin-based resin, or both may be made of synthetic resins other than polyolefin-based resins. [Explanation of symbols]

[0078] 1...container, 2...container 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, 31...long side base constituent part, 32...long side internal space, 33...long side internal surface constituent part, 36...long side frame wall part, 37...auxiliary protrusion, 37a...curved part, 38...long side shaft protrusion part, 41...long side base side mating wall portion, 42b...outer tip wall portion on long side, 43...lower extending wall portion of long side frame, 44...lower vertical wall portion of long side frame, 48...corresponding recess, 50...long side orthogonal wall portion, 62...internal space in bottom wall, 77...lower vertical wall portion within long side base, 78...middle wall portion of long side base, 111...rotating reinforcement rib, 114...radial rib, 116...short side rotating reinforcement rib, 117...short side radial rib.

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 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, At least a pair of opposing first side wall portions of the side wall portions are configured by a first member and a second member that is located on the outer side of the container with respect to the first member and forms an internal space between the first member and the second member, a pair of pivot shafts that pivotally connect the first side wall portion to the bottom wall constituent portion are provided on sides of a lower portion of one of the first member and the second member; an outer peripheral surface of the pivot shaft portion is disposed at a distance from a lower outer peripheral edge of the connecting surface to which the pivot shaft portion is connected to an inner peripheral side of the outer peripheral edge of the connecting surface; A container characterized in that a plurality of radial ribs are provided, extending in a substantially centrifugal direction from the outer peripheral surface of the base side portion of the pivot shaft portion that connects to the connecting surface, and connecting between the outer peripheral surface of the pivot shaft portion and the connecting surface.

2. 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 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 pair of pivot shafts that pivotally connect the side wall portions to the bottom wall component are provided on connecting surfaces of the side portions of the side wall portions, A container characterized in that a plurality of radial ribs are provided on the outer peripheral surface of the rotating shaft portion, extending in a substantially centrifugal direction of the rotating shaft portion.

3. A rotation reinforcement rib is provided protruding laterally from the outer peripheral edge of the connecting surface, 3. The container according to claim 1, wherein the radial ribs connect the pivot shaft portion and the pivot reinforcement rib.

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