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 is known a container that includes a bottom wall portion having a substantially rectangular shape, a bottom wall component portion having base portions protruding upward along each side edge portion of the bottom wall portion, and side wall portions rotatably connected to each base portion, and that can be assembled into a box shape that opens upward and that can be folded by tilting each side wall portion above the bottom wall portion. There is also a technology that makes each side wall portion and the bottom wall component portion have a hollow structure to improve the cold / warm insulation properties (for example, see Patent Document 1, etc.). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2002-332037 A Summary of the Invention [Problem to be solved by the invention]

[0004] In a structure 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 capable of preventing damage to the rotating shaft portion. [Means for solving the problem]

[0006] The following describes each of the means suitable for achieving the above objects. Note that, as necessary, the specific effects of the corresponding means will be added.

[0007] Means 1. A bottom wall component having a bottom wall portion having a generally rectangular shape in a plan view and a base portion protruding upward along a side portion of the bottom wall portion; A side wall portion is connected to the base portion of the bottom wall component so as to be rotatably displaceable 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 down toward a center portion of the bottom wall portion, A container capable of changing 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 a second member, a pair of pivot shafts that connect the first side wall portion to the bottom wall constituent portion so as to be pivotally displaceable are provided on sides of a lower portion of one of the first member and the second member; an outer circumferential surface of the pivot shaft portion is disposed so as to be spaced apart from a lower outer circumferential edge of the connecting surface to which the pivot shaft portion is connected, on the inner circumferential side of the outer circumferential edge of the connecting surface; A container characterized in that a plurality of radial ribs are provided which extend in a substantially centrifugal direction from the outer peripheral surface of the base side portion of the pivot shaft which is connected to the connecting surface and connect between the outer peripheral surface of the pivot shaft 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. This makes it possible to avoid a situation in which unnecessary irregularities are formed on the pivot shaft, as in the case where the pivot shaft is formed by combining a portion formed by the first member with a portion formed by the second member, and the pivot displacement of the side wall is hindered. In addition, it is possible to improve the molding accuracy of the pivot shaft, compared to the case where, for example, almost the entire first side wall including the pivot shaft is integrally formed so as to form an internal space. 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 and the connecting surface serve to reinforce the pivot shaft, thereby making it possible to prevent damage to the pivot shaft even if the pivot shaft has a relatively simple and straightforward configuration.

[0010] Means 2. A bottom wall component having a bottom wall portion having a generally rectangular shape in a plan view and a base portion protruding upward along a side portion of the bottom wall portion; A side wall portion is connected to the base portion of the bottom wall component so as to be rotatably displaceable 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 down toward a center portion of the bottom wall portion, A container capable of changing 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 comprising: a plurality of radial ribs extending from an outer circumferential surface of the rotating shaft portion in a substantially centrifugal direction of the rotating shaft portion.

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

[0012] Means 3. A rotation reinforcement rib is provided protruding laterally from the outer circumferential edge of the connecting surface, The container described in means 1 or 2, characterized in that the radial rib connects between the pivot shaft portion and the pivot reinforcement rib.

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

[0014] [Figure 1]FIG. 2 is a perspective view showing the container in an assembled state with a lid placed on the container body. [Diagram 2] FIG. 2 is a perspective view of the container body in an assembled state. [Diagram 3] FIG. 2 is a perspective view showing the upper surface side of the container body in a folded state. [Figure 4] FIG. 4 is a perspective view showing the underside of the container body in a folded state. [Diagram 5] FIG. 4 is a perspective view showing the underside of the lid body. [Figure 6] 1 is a perspective view showing a container with a lid placed on a folded container body. FIG. [Figure 7] 1 is a perspective view showing a container body with a short-side side wall portion in an upright position and a long-side side wall portion in a folded position; FIG. [Figure 8] 11 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). FIG. [Figure 9] 4 is a partially enlarged perspective view showing the periphery of a short-side shaft protrusion of a short-side side wall portion. FIG. [Figure 10] 11 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. FIG. [Figure 11] 1 is a perspective view showing the rear surface side (short side internal space side) of a short side inner surface constituent portion. FIG. [Figure 12] 11 is a partially enlarged perspective view showing the back side (short-side internal space side) of the short-side inner surface constituent portion. FIG. [Figure 13] 11 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] 13 is a partially enlarged perspective view showing the periphery of a long-side shaft protrusion of a long-side side wall portion. FIG. [Figure 15] 11 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] 11 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] 11 is a perspective view showing the back side (long-side internal space side) of the long-side inner surface constituent portion. FIG. [Figure 18]11 is a partially enlarged perspective view including a partial cross section showing the upper surface side of the bottom wall base component. FIG. [Figure 19] 11 is a partially enlarged perspective view including a partial cross section showing the underside of the bottom wall base component. FIG. [Figure 20] FIG. 4 is a partially enlarged perspective view including a partial cross section of a bottom wall lower surface component. [Figure 21] FIG. 4 is a partially enlarged perspective view of a bottom wall lower surface component. [Figure 22] 4 is a partially enlarged vertical cross-sectional view showing the short side wall portion and the short side base portion of the container body in an assembled state. FIG. [Figure 23] FIG. 4 is a partially enlarged horizontal cross-sectional view of the container body in an assembled state. [Figure 24] 4 is a partially enlarged vertical cross-sectional view showing the long side wall portion and the long side base portion of the container body in an assembled state. FIG. [Diagram 25] 4 is a partially enlarged vertical cross-sectional view showing a connecting portion between a short-side shaft protrusion and a 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 placed on the folded container body. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] An embodiment will be described below with reference to the drawings. As shown in Figs. 1, 2, etc., the container 1 includes a container body 2 in the shape of a rectangular box that opens upward, and a lid body 3 that is detachably fitted to the container body 2. As shown in Figs. 3, 7, 18, etc., the container body 2 includes a bottom wall component 4 including a bottom wall portion 5 that is generally rectangular in plan view, short side base portions 6 that protrude upward from the bottom wall portion 5 along each short side edge of the bottom wall portion 5, and long side base portions 7 that protrude upward from the bottom wall portion 5 along each long side edge of the bottom wall portion 5. Furthermore, as shown in Figs. 2, 3, etc., the container body 2 includes short side side wall portions 8 and long side side wall portions 9 that can be rotatably displaced 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 tilted toward the center of the bottom wall portion 5. For this reason, 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 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 state (see Figures 3 and 4), thereby enabling space saving, etc.

[0016] 7 and 18, the protruding length of the short-side base portion 6 from the bottom wall portion 5 is longer than the protruding length of the long-side base portion 7 from the bottom wall portion 5, and as shown in FIG. 18, the forming position of the short-side bearing portion 74 for rotatably supporting the short-side sidewall portion 8 is also located above the forming position of the long-side bearing portion 83 for rotatably supporting the long-side sidewall portion 9. Furthermore, as shown in FIG. 2, FIG. 7, etc., the width of the short-side sidewall portion 8 is configured to be approximately the same as the short side width of the bottom wall component 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 the assembled state is folded, the pair of long-side sidewall portions 9 are first displaced to the folded position so as to overlap the bottom wall portion 5, and then the short-side sidewall portion 8 is displaced to the folded position so as to overlap 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 its outer region, 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, 10, etc., the short side base component 11 includes a short side outer surface base wall portion 15 having an upper wall portion 16 having a generally rectangular shape when viewed from the front, an extending wall portion 17 extending from the lower edge of the upper wall portion 16 toward the inside of the container body 2, and a lower wall portion 18 extending downward from the tip edge (inner end edge) of the extending wall portion 17, a generally rectangular frame-shaped short side frame wall portion 19 extending from the outer peripheral edge of the short side outer surface base wall portion 15 toward the inside of the container body 2, and a lower wall portion 18 of the short side frame wall portion 19. The short side frame wall portion 19 is provided with a pair of short side shaft protrusions 20 (pivot shaft portions) which protrude laterally of the short side base constituent portion 11 from the lower part of the outer surface of the portions corresponding to the left and right side edges of the upper wall portion 16, an inner surface adjustment portion 21 which extends laterally of the short side base constituent portion 11 from the inner edge of the container body 2 at portions of the short side frame wall portion 19 which correspond to the left and right side edges of the upper wall portion 16, and a locking constituent portion 22 which protrudes inwardly of the container body 2 from the side edge of each inner surface adjustment portion 21.

[0019] 10, 22, and 23, in this embodiment, the short side frame wall 19 has a double wall structure in the inner and outer periphery direction of the short side frame wall 19 at the inner side of the container body 2. More specifically, the short side frame wall 19 has a short side inner end wall 23a and a short side outer end wall 23b that face each other at a distance in the inner and outer periphery direction of the short side frame wall 19, and a short side insertion space 23c that opens to the inner side of the container body 2 is formed between the short side inner end wall 23a and the short side outer end wall 23b. Furthermore, the short side inner end wall 23a has an inner edge of the container body 2 that extends continuously at the same position in the thickness direction of the short side side wall 8 around the entire circumference. As shown in Figures 10 and 23, the portion of the short side outer end wall portion 23b corresponding to the side edge portion of the short side frame wall portion 19 protrudes more toward the inside of the container body 2 than other portions of the short side outer end 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 the 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 end wall portion 23b.

[0020] As shown in Figures 8, 10, etc., the locking component 22 includes a locking wall portion 24 having a substantially rectangular plate shape that protrudes inward from the side edge portion 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 part 13 includes a short side inner surface base wall part 27 having a substantially rectangular shape in front view, and a short side orthogonal wall part 28 having a substantially square frame shape extending from the outer peripheral edge of the short side inner surface base wall part 27 to the outside of the container body 2. As shown in Fig. 12, a short side insertion tip wall part 29 formed so as to reduce the thickness of the short side orthogonal wall part 28 on the outer peripheral side is provided at the tip side (outside the container body 2) part of the short side orthogonal wall part 28. Then, as shown in Figs. 22 and 23, the short side insertion tip wall part 29 of the short side inner surface forming part 13 is inserted (press-fitted) into the short side insertion space 23c of the short side base forming part 11, so that the short side inner tip wall part 23a and the short side outer tip wall part 23b are fitted to the short side insertion tip wall part 29. The short side inner end wall 23a and the short side outer end wall 23b are fitted into the short side insertion end 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, the short side internal space 12 formed between the short side base constituent part 11 and the short side inner surface constituent part 13 is provided with a heat insulating member 10 made of foamed polyurethane.

[0022] In this embodiment, the short side base constituent part 11 and the short side inner surface constituent part 13 are subjected to an activation surface treatment to impart reaction activity for bonding with the heat insulating member 10 to the entire surface of the surface that defines the short side internal space 12. Examples of the activation surface treatment include frame treatment, corona discharge treatment, plasma treatment, ultraviolet irradiation treatment, and primer treatment. By carrying out these treatments, the surface of the polyolefin resin, which originally has a low activity, can be made into a highly active surface in which active groups and dangling bonds (unbonded bonds in atoms) are exposed. The short side base constituent part 11 and the short side inner surface constituent part 13 that have been subjected to the activation surface treatment are assembled, and the raw material liquid of the heat insulating member 10 (in this example, uncured polyurethane resin) is injected into the short side internal space 12 and solidified to form the heat insulating member 10. In order to prevent deformation of the short side base constituent part 11 and the short side inner surface constituent part 13 due to foaming of the polyurethane foam, the short side base constituent part 11 and the short side inner surface constituent part 13 in the assembled state are set in a mold, and then a raw material liquid is poured into the short side inner space 12. In addition, since the above-mentioned activated surface treatment is applied to the surface defining the short side inner space 12, the short side base constituent part 11 and the short side inner surface constituent part 13 are strongly bonded to the heat insulating member 10. The heat insulating member 10 is also provided in the same manner for the long side side wall part 9 and the bottom wall constituent part 4 described later. Although the activated surface treatment is not applied to the lid body 3, the raw material liquid of the heat insulating member 10 is poured therein and solidified. In addition, injection ports 30a for injecting the raw material liquid of the heat insulating member 10 into the short-side sidewall portion 8, the long-side sidewall portion 9, the bottom wall constituent portion 4, and the lid body 3 are provided in recesses formed in the mounting surface so that 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 sidewall portion 8 is provided on one side of short-side frame wall portion 19.

[0023] 13 and 17, each long side sidewall portion 9 as a first sidewall portion includes a long side base constituent portion 31 as a second member constituting most of the long side sidewall portion 9 including the outer region, and a long side inner surface constituent portion 33 as a first member forming 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 portion 35 which is approximately rectangular when viewed from the front, a long side frame wall portion 36 which extends from the outer peripheral edge of the long side outer base wall portion 35 toward the inward side of the container body 2, auxiliary protrusions 37 which protrude downward from multiple points on the lower edge of the long side frame wall portion 36, and a pair of long side shaft protrusions 38 which serve as rotating shafts which protrude laterally of 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 portion 36.

[0025] 15, the upper edge of the long-side frame wall 36 is configured to extend from the long-side outer base wall 35 shorter than the side edges of the long-side frame wall 36. Furthermore, a folded wall 39 extending downward from the inner edge (inner edge) of the upper edge of the long-side frame wall 36 on the container body 2, and a replacement wall 40 extending from the lower edge of the folded wall 39 to the inner side of the container body 2 are provided, and 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, a substantially rectangular frame-shaped wall (hereinafter referred to as "long-side base mating wall 41") is configured by both side edges and the lower edge of the long-side frame wall 36, and the replacement wall 40.

[0026] 15, 16, 23, and 24, in this embodiment, the portion of the long side base mating wall 41 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 mating wall 41 has a long side inner end wall 42a and a long side outer end wall 42b that face each other and are spaced apart from each other in the inner and outer circumferential directions of the long side base 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 end wall 42a and the long side outer end wall 42b.

[0027] 15, 16 and 24, the lower side of the long side frame wall 36 includes a long side frame lower extending wall 43 extending from the long side outer surface 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 long side inner tip wall 42a has an edge on the inside of the container body 2 that extends continuously around the entire circumference 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, for the long side outer tip wall portion 42b, a portion corresponding to the lower side of the long side frame wall portion 36 protrudes further inwardly of the container body 2 than the other portions of the long side outer tip wall portion 42b, and also protrudes further inwardly of the container body 2 than the long side inner tip wall portion 42a (with respect to the other portions of the long side outer tip wall portion 42b, the long side inner tip wall portion 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 portion 42b.

[0028] 7 and 13, both sides on the outer surface side of the long side outer base wall portion 35 are provided with locked components 45 which are engaged by substantially abutting with the locking components 22 of the short side side wall portion 8 when the container body 2 is in an assembled state. The locked components 45 include locked wall portions 46 which are configured such 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 which protrude from the locked wall portions 46 toward the outside of the container body 2.

[0029] In the assembled state of the container body 2, the outer surface side of the locked component 45 of the long side sidewall 9 is in approximate contact with the locking component 22 of the short side sidewall 8, thereby restricting the outward displacement of the long side sidewall 9 of the container body 2. In addition, both sides of the long side sidewall 9 (sides of the locked component 45) are in approximate contact with the inner surface of the short side sidewall 8, thereby restricting the inward displacement of the short side sidewall 8 of the container body 2. Furthermore, the locking projection 47 of the locked component 45 of the long side sidewall 9 is inserted into the locking hole 25 of the locking component 22 of the short side sidewall 8 to be in an engaged state, thereby restricting the outward displacement of the short side sidewall 8 of the container body 2 and the relative displacement between the short side sidewall 8 and the long side sidewall 9 in the up-down direction.

[0030] As shown in Fig. 17, the long side inner surface forming part 33 includes a long side inner surface base wall part 49 having a generally rectangular shape in front view, and a long side orthogonal wall part 50 having a generally square frame shape extending from the outer peripheral edge of the long side inner surface base wall part 49 to the outside of the container body 2. A long side insertion tip wall part 51 formed so as to reduce the thickness of the long side orthogonal wall part 50 on the outer side of the container body 2 is provided in the long side orthogonal wall part 50. Then, as shown in Figs. 23 and 24, the long side insertion tip wall part 51 of the long side inner surface forming part 33 is inserted (press-fitted) into the long side insertion space 42c of the long side base forming part 31, so that the long side inner tip wall part 42a and the long side outer tip wall part 42b are fitted to the long side insertion tip wall part 51. The long side inner end wall portion 42a and the long side outer end wall portion 42b are fitted to the long side insertion end wall portion 51, so that the long side base mating wall portion 41 and the long side orthogonal wall portion 50 are engaged with each other, and the long side base constituent portion 31 and the long side inner surface constituent portion 33 are assembled together. Furthermore, the long side internal space 32 formed between the long side base constituent portion 31 and the long side inner surface constituent portion 33 is provided with a heat insulating member 10 made of foamed polyurethane. In addition, as shown in Figs. 2 and 17, the injection port 30a of the long side side wall portion 9 is provided at the lower part of the width direction center of the long side inner surface constituent portion 33 (long side inner surface base wall portion 49).

[0031] As shown in Figs. 18 to 21, the bottom wall constituent part 4 includes a bottom wall base constituent part 61 (bottom wall second member) constituting most of the bottom wall constituent part 4 including the upper part, and a bottom wall lower surface constituent part 63 (bottom wall first member) constituting the lower surface side of the bottom wall part 5 and forming a bottom wall internal space 62 (see Figs. 22 and 24) between 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 constituting the upper surface (the placement part on which the contents are placed) of the bottom wall part 5 having a substantially rectangular shape in a plan view, the short side side base part 6 protruding upward from the short side edge part of the bottom wall upper surface base wall part 64, and the long side side base part 7 protruding upward from the long side edge part of the bottom wall upper surface base wall part 64.

[0032] The short side base portion 6 includes a short side base inner lower vertical wall portion 66 extending upward from the short side edge portion of the bottom wall upper surface base wall portion 64, a short side base middle wall portion 67 extending from the upper edge portion of the short side base inner lower vertical wall portion 66 to the outside of the container body 2, a short side base inner upper vertical wall portion 68 extending upward from the edge portion of the short side base middle wall portion 67 on the outside of the container body 2, a short side base axis wall portion 69 extending upward from both side edges of the short side base middle wall portion 67, and the short side base axis It comprises a short side base upper wall portion 70 extending outward from the upper edge of wall portion 69 to the outer side 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 outer side of the container body 2 (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] The short side bearing portion 74 in this embodiment is provided at the lower part of each short side base shaft wall portion 69. As shown in Fig. 25, the short side bearing portion 74 has a substantially cylindrical short side shaft protrusion 20 inserted therein and is substantially fitted to an extent that rotation of the short side shaft protrusion 20 is permitted. This allows the short side side wall portion 8 to be connected (axially supported) to the short side base portion 6 so as to be rotatable and displaceable. Also, as shown in Figs. 18 and 25, a short side shaft guide groove portion 75 is provided in the short side base shaft wall portion 69, extending in a substantially vertical direction from a position slightly spaced upward from the short side bearing portion 74 to the upper edge portion 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 to the outward side of the container body 2, a long side base inner upper vertical wall portion 79 extending upward from the outward edge of the container body 2 of the long side base middle wall portion 78, a long side base upper wall portion 80 extending to the outward side 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 outward edge of the container body 2 of the long side base upper wall portion 80. Both side portions of the long side base upper wall portion 80 slope upward toward the side and are connected to the short side base portion 6, and the upper surface sides of both side portions of the long side base upper wall portion 80 are connected to the locking wall support wall portions 73 of the short side base portion 6.

[0035] 18, the long side base portion 7 is provided with a rotation allowing recess 82 that allows the auxiliary protrusion 37 of the long side side wall portion 9 to be inserted between the long side base middle wall portion 78 and the long side base inner lower vertical wall portion 77 (see FIG. 24). The rotation allowing recess 82 is provided at both ends of the long side base portion 7, and is also provided at a plurality of locations in the longitudinal middle position of the long side base portion 7 corresponding to the auxiliary protrusion 37. In addition, in this embodiment, in the portions corresponding to the rotation-permitting recesses 82, the upper vertical wall portion 79 within the long side base extends downwardly and connects 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 within the long side base, the portion where the upper vertical wall portion 79 within the long side base extends downwardly, 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 parts 83 in this embodiment are provided in the short side base inner lower vertical wall part 66 of the short side base part 6 at positions facing the rotation allowing recesses 82 provided at both ends of the long side base part 7. The long side bearing parts 83 have the generally cylindrical long side shaft protrusions 38 inserted therein and are generally fitted to an extent that rotation of the long side shaft protrusions 38 is permitted. This allows the long side side wall part 9 to be rotatably connected (axially supported) to the short side base part 6. Particularly in this embodiment, the long side bearing parts 83 are provided from the lower edge part to the upper edge part of the short side base inner lower vertical wall part 66. That is, when the long side wall portion 9 is folded (the short side wall portion 8 is in an upright position), the long side wall portion 9 is configured to be vertically displaceable relative to the bottom wall constituent portion 4 so that the long side side wall portions 9 in the folded position can be stacked vertically within the range where the long side shaft protrusion 38 is inserted into the long side bearing portion 83 (see FIG. 7). 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 inner side of the container body 2 (the long side base portion 7 side). The upper surface of the stopper 83a is inclined to make the insertion of the long side shaft protrusion 38 into the long side bearing portion 83 relatively smooth, and the lower surface of the stopper 83a forms an angle close to the substantially vertical direction with respect to the inner surface of the long side bearing portion 83 (the lower vertical wall portion 66 inside 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 portion 9 being tilted too far to the right or left when the long-side sidewall portion 9 is in the folded position. The stopper 83a is configured not to protrude outside the long-side bearing portion 83 (it does not protrude further inwardly of the container body 2 than the short-side base lower vertical wall portion 66). In addition, in order to make it easier to insert the long-side shaft protrusion 38 into the long-side bearing portion 82 when the long-side sidewall portion 9 is attached to the bottom wall component 4, an inclined portion is provided in the lower portion of the long-side shaft protrusion 38 when the long-side sidewall portion 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 bottom wall inner end wall portion 84a and bottom wall outer end wall portion 84b that are spaced apart from each other and opposed to 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 joint wall portion having a substantially rectangular frame shape.

[0038] As shown in Figs. 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 when viewed from below, and a bottom wall orthogonal wall portion 87 protruding upward from the outer periphery of the bottom wall lower surface base wall portion 86. As shown in Figs. 4 and 20, the outer periphery of the bottom wall lower surface base wall portion 86 is formed into a convex shape protruding downward, and 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, downwardly protruding ribs are provided in a lattice pattern (the lower end of the convex shape and the lower end of the rib become the grounding portion that contacts the installation surface such as the floor surface on which the container is installed). The bottom wall orthogonal wall portion 87 extends upward from the bottom wall lower surface base wall portion 86 in a generally vertical direction, and further extends from the end edge toward the outer side of the container body 2, and further extends upward approximately vertically across the curved portion to form a stepped shape.

[0039] 20, 21, etc., a bottom wall insertion tip wall portion 88 formed so as to reduce the thickness of the outer circumferential side of the bottom wall orthogonal wall portion 87 is provided in an upper portion of the bottom wall orthogonal wall portion 87. Then, as shown in Figures 22, 24, etc., the bottom wall insertion tip wall portion 88 of the bottom wall lower surface forming portion 63 is inserted (press-fitted) into the bottom wall insertion space 84c of the bottom wall base forming portion 61, whereby 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. The bottom wall inner end wall portion 84a and the bottom wall outer end wall portion 84b are fitted to the bottom wall insertion end wall portion 88, so that 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 the bottom wall base constituent portion 61 and the bottom wall lower surface constituent portion 63 are assembled. Furthermore, the bottom wall internal space 62 formed between the bottom wall base constituent portion 61 and the bottom wall lower surface constituent portion 63 is provided with a heat insulating member 10 made of foamed polyurethane. 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 portion of the bottom wall orthogonal wall portion 87 of the bottom wall lower surface constituent portion 63.

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

[0041] As shown in Figures 22 and 23, in this embodiment, when the container body 2 is in an assembled state, 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 portion 11 and the short side inner surface component portion 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 heat insulating member 10 of the short side sidewall portion 8 and the heat insulating member 10 of the long side sidewall portion 9 are disposed on the inside of the container body 2 of the short side shaft protrusion portion 20 and the short side bearing portion 74, the heat insulating member 10 of the lid body 3 is disposed above, and the heat insulating member 10 of the bottom wall constituent portion 4 is disposed below (see FIG. 25). Moreover, as shown in FIG. 23, in the width direction of the long side sidewall portion 9, the portion (side surface) of the long side sidewall portion 9 in which the heat insulating member 10 is present and the portion (inner surface) of the short side sidewall portion 8 in which the heat insulating member 10 is present are configured to be close to (or abut) (with almost no gap).

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

[0043] 3, 18, 22, etc., a base-side engagement 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 engagement portions 103 provided on each short-side base portion 6 are provided at two locations, each set consisting of a pair of left and right base portions, in the width direction of the short-side base portion 6. Furthermore, the base-side engagement portion 103 is in the shape of a protrusion with the vertical direction being 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.

[0044] 3, 8, 22, etc., the lower wall 18 on the outer surface side of the short-side sidewall 8 is provided with two concave sidewall engaging portions 104 into which a pair of left and right base engaging portions 103 can be inserted, corresponding to a set of two base engaging portions 103 provided at two locations. Also, even in the portion of the lower wall 18 where the sidewall engaging portions 104 are provided, a short-side internal space 12 is formed between the short-side inner surface constituent portion 13 and the heat insulating member 10 is provided. Furthermore, the upper edge portion of the sidewall engaging portion 104 is flush with the lower surface of the extension wall portion 17.

[0045] 22 and 23, by putting the short side side wall portions 8 in an upright position (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. In addition, 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 in an assembled state, the side wall side engagement portion 104 and the base side engagement 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), between the insulating member 10 of the short side side wall portion 8 in the width direction of the short side side wall portion 8, and 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] In addition, when the container body 2 is in an assembled state, (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 abutted or adjacent to each other.

[0047] In addition, when only the short side wall 8 is put into an upright position (as shown in FIG. 7) during the process of assembling the container body 2 in the folded state, the lower surface of the extension wall 17 and the upper edge of the side wall engaging portion 104 are supported by contacting the upper surface of the short side base upper wall portion 70 of the short side base portion 6 and the upper edge (upper surface) of the base engaging portion 103 (see FIGS. 18 and 22). This allows the short side wall 8 to maintain the upright position (stand on its own) even if the worker does not hold the short side wall 8 in the upright position.

[0048] 6, the lid 3 is configured to be placed on the top surface of the short-side base portion 6 (short-side base upper wall portion 70) to cover the folded container body 2. At this time, as shown in FIG. 26, the lower surface of the lid 3 is supported not only by the top surface of the short-side base upper wall portion 70 but also by the top side portion (top surface) of the base side engagement portion 103 provided on the same plane as the top surface of the short-side base upper wall portion 70.

[0049] In addition, as shown in Fig. 1 and other figures, the upper wall 16 of each short side sidewall 8 is provided with a handle 107 at a position lower than the upper edge of the upper wall 16, which allows an operator to easily place his / her hand on the upper side of the container body 2 (container 1) in the assembled state when lifting the container body 2 (container 1). Furthermore, as shown in Figs. 1 and 2, the upper wall 16 of each short side sidewall 8 is provided with a handle 108 formed in a concave shape from a position slightly lower than the lower edge of the outer circumferential surface of the lid 3 to the upper side of the short side sidewall 8 when the lid 3 is placed on the container body 2 in the assembled state. This makes it possible to lift the lid 3 by placing the fingertips on the underside of the lid 3 via the handle 108 when removing the lid 3 from the container body 2.

[0050] Now, 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] As shown in Figs. 14, 15, 24, etc., each auxiliary protrusion 37 protrudes downward from the long side outer end 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 end wall portion 42b, and the range from the lower edge portion to the inner edge of the long side outer end wall portion 42b of the container body 2). 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 allowance 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 is substantially semicircular with a curved lower side when the long side base component 31 is viewed from the side (side edge side).

[0052] As shown in Fig. 13, the auxiliary protrusions 37 are provided at seven locations spaced apart from each other by a predetermined distance in the width direction of the long-side sidewall portion 9. Furthermore, auxiliary connecting portions 37b are provided to connect the side surfaces of the auxiliary protrusions 37 at both ends, each of which is 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 about 45 degrees on the inner side of the container body 2). As shown in Fig. 18, the rotation allowing 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 FIG. 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 the cross-sectional shape of the connected portion is curved along the curved portion 37a of the auxiliary protrusion 37.

[0054] 24, in the horizontal direction, 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 outer side of the container body 2 of 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 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 constituent part 4 (long side base part 7) is disposed on the outer side of the container body 2 of the auxiliary protrusion 37, as described above.

[0055] As shown in Figs. 13 and 24, a corresponding recess 48 is provided at the lower part of the outer surface side (long side base component 31) of the long side side wall 9, which is formed by the long side frame lower extension wall 43 and the long side frame lower vertical wall 44 and opens outward and downward of the container body 2. When the container body 2 is in an assembled state, the lower edge part (the lower surface of the long side frame lower extension wall 43) of the corresponding recess 48 facing downward 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 in an assembled state, each auxiliary protrusion 37 is inserted into the corresponding rotation allowance 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, in the assembled state of the container body 2, at least one of the long side frame lower extending wall portion 43 and the long side outer tip wall portion 42b is configured to be supported by abutting against 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 received between (the gaps between) the auxiliary protrusions 37.

[0056] The outer peripheral surface of the long-side shaft protrusion 38 is disposed spaced away from the lower outer peripheral edge of the auxiliary protrusion 37 toward the inner peripheral side of the auxiliary protrusion 37. In the present embodiment, in a side view of the long-side sidewall 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 which protrudes laterally from the outer periphery 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 which extends substantially horizontally to match the substantially semicircular auxiliary protrusion 37, and a curved corresponding portion 113 which is curved so as to be convex downward. 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 from the outer circumferential surface of the base side portion of the long side shaft protrusion 38 that is connected to the auxiliary protrusion 37 in a substantially centrifugal direction of the long side shaft protrusion 38 and connect the outer circumferential surface of the long side shaft protrusion 38, the inner circumferential 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 protruding direction from the auxiliary protrusion 37 is provided on the same plane as the leading edge of the rotation reinforcement rib 111 in the protruding direction 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 provided 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 further than the side portion of the long side frame wall portion 36 (long side base side mating wall portion 41).

[0060] As shown in Fig. 9, the outer peripheral surface of the short-side shaft protrusion 20 is disposed at a distance from the outer peripheral edge of the lower part of the side of the short-side frame wall 19 of the short-side base component 11 to the inner peripheral side. In addition, a short-side rotation reinforcement rib 116 is provided which protrudes from the outer peripheral edge of the lower part of the side of the short-side frame wall 19 to the lateral side of the short-side side wall 8. In addition, a plurality of short-side radial ribs 117 are provided which extend in the approximate centrifugal direction of the short-side shaft protrusion 20 from the outer peripheral surface of the base side part of the short-side shaft protrusion 20 which is connected to the short-side frame wall 19, and which connect 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. The short side radial ribs 117 in this embodiment are provided with those that extend outward from the short side shaft protrusion 20 of the container body 2 in the horizontal direction, those that extend inward of the container body 2, and those that extend downward and upward from the short side shaft protrusion 20 in the vertical direction. In addition, the leading edge of the short side radial rib 117 in the protruding direction from the short side frame wall portion 19 is provided on the same plane as the leading edge of the short side rotation reinforcement rib 116 in the protruding direction from the short side frame wall portion 19. The short side shaft protrusion 20 protrudes laterally beyond the side edge portion (leading edge in the protruding direction from the side portion of the short side frame wall portion 19) of the short side rotation reinforcement rib 116 and the short side radial rib 117.

[0061] As described above in detail, according to this embodiment, the long side shaft protrusion 38 is provided on the auxiliary protrusion 37 of the long side base constituent part 31. Therefore, for example, when the long side shaft protrusion 38 is formed by combining a part formed by the long side base constituent part 31 and a part formed by the long side inner surface constituent part 33, it is possible to avoid a situation in which unnecessary unevenness is formed in the long side shaft protrusion 38 and the rotational displacement of the long side side wall part 9 is hindered. In addition, compared to a case in which almost the entire long side side wall part 9 including the long side shaft protrusion 38 is integrally formed so as to form the long side inner space 32, for example, the molding accuracy of the long side shaft protrusion 38 can be improved. Therefore, the rotational ability of the long side side wall part 9 can be improved. In addition, since the short side shaft protrusion 20 is also formed only by the short side base constituent part 11, the short side shaft protrusion 20 can be formed in a suitable shape, and the rotational ability of the short side side wall part 8 can be improved.

[0062] In addition, the auxiliary protrusion 37 on which the long side shaft protrusion 38 is provided is provided on the lower side of the long side base component 31 (long side frame wall 36, long side base mating wall 41) including the range of the long side outer tip wall 42b (extension portion) located below the lower side of the long side orthogonal wall 50, which extends below the lower side of the long side inner surface component 33 (long side orthogonal wall 50). Therefore, the formation position of the long side shaft protrusion 38 can be set relatively freely in the thickness direction of the long side side wall 9. Therefore, the auxiliary protrusion 37 and the long side shaft protrusion 38 are arranged on the inner side of the container body 2, and the bottom wall internal space 62 of the bottom wall component 4 can be arranged (secured) on the outer side of the container body 2 of the auxiliary protrusion 37 and the long side shaft protrusion 38, and in this embodiment, the heat insulating member 10 is also provided in the bottom wall internal space 62. That is, the auxiliary protrusion 37 protruding downward from the lower side (long side outer tip wall 42b) of the long side frame wall 36 (long side base side mating wall 41) and the long side shaft protrusion 38 are not provided with the long side internal space 32, and hence the heat insulating member 10, but when the long side sidewall 9 is in an upright position, the heat insulating member 10 of the bottom wall internal space 62 of the bottom wall constituent part 4 is arranged on the outer side of the container body 2 of the auxiliary protrusion 37 and the long side shaft protrusion 38. This makes it possible to prevent the heat insulating property from decreasing around the lower side of the long side sidewall 9. Therefore, it is possible to avoid the decrease in heat insulating property caused by providing the auxiliary protrusion 37 and the long side shaft protrusion 38, and improve the cold insulation and heat insulation property of the container 1. 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] In addition, the curved portion 37a of the auxiliary protrusion 37 assists the rotational movement of the lower side of the long side wall portion 9, so that the rotational ability of the long side wall portion 9 can be further improved. Furthermore, the lower side portions of the long side base component 31 (long side frame wall portion 36, long side base mating wall portion 41) and the long side inner surface component 33 (long side orthogonal wall portion 50) themselves can be made straight, and the lower side portions of the long side frame wall portion 36 and the long side orthogonal wall portion 50 can be preferably butted together (abutted or brought into close proximity) compared to the case where the lower side 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, the configuration for engaging them can be preferably provided.

[0064] Furthermore, when the edges of the long side base component 31 (long side base mating wall portion 41) and the long side inner surface component 33 (long side orthogonal wall portion 50) are engaged 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 portion 9 from the lower edges 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 portion 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 a double wall structure is formed in which the lower edge portion of the long side base component portion 31 (long side base side mating wall portion 41) and the lower edge portion of the long side inner surface component portion 33 (long side orthogonal wall portion 50) overlap in the vertical direction.As a result, even without joining the lower edge portions of the long side base component portion 31 and the long side inner surface component portion 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 portion 31 and the long side inner surface component portion 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 making it possible to prevent deformation of auxiliary protrusions 37 provided with long-side shaft protrusions 38. Furthermore, auxiliary connecting portions 37b are provided along curved portion 37a, which not only reliably reinforces curved portion 37a but also improves the rotatability of long-side side wall portion 9 by auxiliary connecting portions 37b.

[0067] Further, each auxiliary protrusion 37 is inserted into a rotation allowing recess 82 provided in the long side base portion 7. In other words, in the assembled state of the container body 2, a portion (block protrusion) constituted by the long side base inner lower vertical wall portion 77 and the long side base middle wall portion 78, which are partitioned by the rotation allowing recess 82 in the longitudinal direction of the long side base portion 7 (the width direction of the long side sidewall portion 9), is configured to be received between the auxiliary protrusions 37. For this reason, it is possible to prevent relative displacement with the bottom wall constituent portion 4 in the width direction of the long side sidewall portion 9.

[0068] In addition, when the container body 2 is in an assembled state, at least one of the lower edge portion of the corresponding recess 48 (the lower surface of the long 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 corresponding upper surface of the long side base upper wall portion 80 and the long side base middle wall portion 78, respectively, thereby preventing the load, etc. of the long side side wall portion 9 from being applied to the auxiliary protrusion 37 when the container body 2 is in an assembled state.

[0069] In addition, a rotation reinforcement rib 111 is provided that protrudes laterally from the outer circumferential edge of the auxiliary protrusion 37 on which the long side shaft protrusion 38 is provided to the long side side wall portion 9, and a radial rib 114 is provided that extends from the outer circumferential surface of the base side of the long side shaft protrusion 38 in a substantially centrifugal direction of the long side shaft protrusion 38 and connects the long side shaft protrusion 38, the rotation reinforcement rib 111, and the auxiliary protrusion 37. This makes it possible to reinforce the long side shaft protrusion 38, and prevents damage to the long side shaft protrusion 38 even if the long side shaft protrusion 38 has a relatively simple and simple 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 even if the relevant portion is configured to slide against the bottom wall constituent portion 4, durability can be improved. 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 have the same effect.

[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 a plurality of members (for example, by assembling an upper component constituting the upper surface side of the lid body 3 and a lower component constituting the lower surface side of the lid body 3, and providing 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 to each other (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 therebetween.

[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] In addition, although the above embodiment is embodied in the container 1 having the lid 3, it is also possible to apply the present invention to a container without the lid 3 (for example, a configuration in which the container bodies 2 are stacked on top of each other and the upper container body 2 serves as a substitute for the lid). Furthermore, in the above embodiment, the heat insulating members 10 are provided in the short side wall portion 8, the long side wall portion 9, the bottom wall component portion 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 (a portion that is flush with the upper surface of the bottom wall portion 5) while the long-side sidewall portion 9 is displaced between the upright position and the folded position. For example, the curved portion 37a may be substantially quarter-circular in shape and have a portion that substantially abuts against the bottom surface of the rotation-permitting recess 82 when the long-side sidewall portion 9 is in the upright position and when the long-side sidewall portion 9 is in the folded position. Also, a recessed portion may be partially provided in the curved portion 37a.

[0075] Further, in the above embodiment, the auxiliary protrusion 37 is provided corresponding to the long side sidewall portion 9, and the long side shaft protrusion 38 is provided on the auxiliary protrusion 37, but instead of or in addition to such a configuration, an auxiliary protrusion may be provided corresponding to the short side sidewall portion 8, and the short side shaft protrusion 20 may be provided on the auxiliary protrusion. Also, for example, it is possible to omit the rotation allowing recess 82 of the long side base portion 7 and omit the auxiliary protrusion 37 between the auxiliary protrusions 37 provided with the long side shaft protrusion 38, but by providing these, the load on the auxiliary protrusion 37 provided with the long side shaft protrusion 38 can be reduced, and the rotational ability of the long side sidewall portion 9 at the intermediate position in the width direction can be improved, and the positional deviation in the width direction of the long side sidewall portion 9 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 component 11, the short side inner surface component 13, the long side base component 31, the long side inner surface component 33, the bottom wall base component 61, the bottom wall lower surface component 63, and the lid body 92 are made of polypropylene, but may be made of other polyolefin-based resins (polyethylene, etc.), or may be made of synthetic resins other than polyolefin-based resins (e.g., ABS resin, AES resin, acrylic resin, polycarbonate, etc.). In addition, the short side base component 11 (long side base component 31, bottom wall base component 61) and the short side inner surface component 13 (long side inner surface component 33, bottom wall lower surface component 63) may be made of different materials. When this configuration is adopted, both of the short side base component 11 and the short side inner surface component 13 may be made of polyolefin-based resins, only one of them may be made of polyolefin-based resins, 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 inner 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 end 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...pivoting reinforcement rib, 114...radial rib, 116...short side pivoting 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 portion of the bottom wall portion; A side wall portion is connected to the base portion of the bottom wall component so as to be rotatably displaceable 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 down toward a center portion of the bottom wall portion, A container capable of changing 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 a second member, a pair of pivot shafts that connect the first side wall portion to the bottom wall constituent portion so as to be pivotally displaceable are provided on sides of a lower portion of one of the first member and the second member, an outer circumferential surface of the pivot shaft portion is disposed so as to be spaced apart from a lower outer circumferential edge of the connecting surface to which the pivot shaft portion is connected, on the inner circumferential side of the outer circumferential edge of the connecting surface; A container characterized in that a plurality of radial ribs are provided which extend in a substantially centrifugal direction from the outer peripheral surface of the base side portion of the pivot shaft which is connected to the connecting surface and connect between the outer peripheral surface of the pivot shaft 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 portion of the bottom wall portion; A side wall portion is connected to the base portion of the bottom wall component so as to be rotatably displaceable 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 down toward a center portion of the bottom wall portion, A container capable of changing 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 comprising: a plurality of radial ribs extending from an outer circumferential surface of the rotating shaft portion in a substantially centrifugal direction of the rotating shaft portion.

3. A rotation reinforcement rib is provided protruding laterally from an outer circumferential 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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