Container

Abstract

To provide a container capable of improving cooling and heating properties.SOLUTION: A short-side side wall part 8 comprises a short-side side base component part 11 and a short-side side inner surface component part 13, and an insulating member 10 made of a foamed resin is provided between them. The short-side side base component part 11 comprises a frame-shaped short-side side frame wall part 19, and the short-side side frame wall part 19 comprises a short-side side inner tip wall part 23a and a short-side side outer tip wall part 23b that form a short-side side insertion space 23c between them. The short-side side inner surface component part 13 comprises a frame-shaped short-side side orthogonal wall part 28, and the short-side side orthogonal wall part 28 comprises a short-side side insertion tip wall part 29 that is inserted into the short-side side insertion space 23c. In addition, a short-side side circumferential protrusion 111 protruding outward from the short-side side insertion tip wall part 29 is provided, and a short-side side tip notch 112 is provided on a tip 29a of the short-side side insertion tip wall part 29, and a short-side side intermediate notch 113 is provided on the short-side side circumferential protrusion 111 at a position different from the short-side side tip notch 112 in a circumferential direction of the short-side side orthogonal wall part 28.SELECTED DRAWING: Figure 20

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 an article, a container body having a bottom wall constituting part having a substantially rectangular shape in a plan view and side wall parts extending upward from each side edge part of the bottom wall constituting part, and a lid body that can be detachably put on the container body are known. There is also a technology in which the container body and the lid body are assembled with an outer member constituting the outside of the container and an inner member constituting the inside of the container, respectively, to form an internal space, and a heat insulating member is provided in the internal space to improve the cold and heat retention properties (for example, see Patent Document 1, etc.). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 9-202365 Summary of the Invention [Problem to be solved by the invention]

[0004] However, there is a concern that the side wall portions and bottom wall constituent portions are easily deformed, resulting in reduced rigidity and the like.

[0005] The present invention has been made to solve the problems exemplified above, and its object is to provide a container that can stabilize the shape of each side wall portion and bottom wall component, and ultimately the shape of the container, and can improve the strength and rigidity, etc. [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; The base portion of the bottom wall component includes a pair of side wall portions connected to be rotatable between an upright position in which the bottom wall portion is erected above each side edge portion and a folded position in which the bottom wall portion is folded toward a center portion of the bottom wall portion, and another pair of side wall portions. 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, Each of the side wall portions and the bottom wall constituent portion is formed of a first member and a second member that forms an internal space between the first member and a second member, the first member and the second member are made of synthetic resin, A heat insulating member made of foamed resin is provided in the internal space, An activated surface-treated region that is imparted with reaction activity for bonding with the heat insulating member is provided in at least a portion of the first member and the second member that defines the internal space, A container, wherein the insulating member is bonded to the activated surface treated region.

[0008] If a configuration is adopted in which ribs or the like are not provided to divide the internal space in order to suitably provide insulating materials in the internal space of the side wall portions and bottom wall portions, there is a concern that the side wall portions and bottom wall portions may be easily deformed, resulting in reduced rigidity, etc.

[0009] In this respect, according to the means 1, by providing the activated surface-treated region on the first member and the second member, the first member and the second member can be suitably joined to the heat insulating member in the activated surface-treated region, and the first member and the second member can be connected via the heat insulating member. Therefore, the first member, the second member, and the heat insulating member are integrated, and the shape of each side wall portion and the bottom wall component, and further the container can be stabilized, and the strength and rigidity can be improved. As a result, the heat insulating member is suitably provided in the internal space of each side wall portion and the bottom wall component, and the formation of unintended gaps, etc. at each connection portion of each side wall portion and the bottom wall component can be avoided, and the cold and heat insulation properties of each side wall portion and the bottom wall component, and further the container can be improved.

[0010] Means 2. The container described in Means 1, characterized in that the first member of each side wall portion has an inner base wall portion having a roughly rectangular shape when viewed from the front, and a first mating wall portion having a roughly square frame shape extending from the outer peripheral edge of the inner base wall portion outwardly of the container.

[0011] Means 3. The second members of the pair of side wall portions each have a locking configuration portion protruding from a side edge portion toward the inside of the container, The second member of the other pair of side wall portions includes a locked component that is substantially in contact with and locked to the locking component, 3. A container as described in means 1 or 2, characterized in that the second member of each side wall portion constitutes an outer portion.

[0012] Means 4. The second member of each of the side walls has a pair of axial protrusions protruding laterally, A container described in any one of means 1 to 3, characterized in that the second member of the bottom wall component constitutes an upper portion of the bottom wall component and is provided with a bearing portion for rotatably supporting each of the side wall portions.

[0013] Means 5. The other pair of side wall portions are provided with a pair of shaft protrusions protruding laterally, the bottom wall component includes a bearing portion for rotatably supporting the other pair of side wall portions, The bearing portion extends in a groove shape in the vertical direction, and a stopper is provided at an upper portion thereof so as to protrude from an inner surface of the bearing portion toward the inside of the container body; A container according to any one of means 1 to 3, characterized in that the upper surface of the stopper is inclined, and the lower surface of the stopper forms an angle that is nearly perpendicular to the inner surface of the bearing portion. [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] 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 10] 11 is a perspective view showing the rear surface side (short side internal space side) of the short side inner surface constituent portion. FIG. [Figure 11] 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 12] 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 13] 13 is a partially enlarged perspective view including a partial cross section showing the back side (long-side internal space side) of the long-side base component. FIG. [Figure 14]13 is a partially enlarged perspective view including a partial cross section showing the back side (long-side internal space side) of the long-side base component. FIG. [Figure 15] 11 is a perspective view showing the back side (long-side internal space side) of the long-side inner surface constituent portion. FIG. [Figure 16] 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 17] 11 is a partially enlarged perspective view including a partial cross section showing the underside of the bottom wall base component. FIG. [Figure 18] FIG. 4 is a partially enlarged perspective view including a partial cross section of a bottom wall lower surface component. [Figure 19] FIG. 4 is a partially enlarged perspective view including a partial cross section of a bottom wall lower surface component. [Figure 20] 3 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 21] FIG. 4 is a partially enlarged horizontal cross-sectional view of the container body in an assembled state. [Figure 22] 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. [Figure 23] 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 24] 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, 16, 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 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 16, the protruding length of the short-side base portion 6 from the bottom wall portion 5 is longer than the protruding length of the long-side base portion 7 from the bottom wall portion 5, and as shown in FIG. 16, the formation position of the short-side bearing portion 74 for rotatably supporting the short-side sidewall portion 8 is also located above the formation 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, 10, etc., each short side side wall portion 8 includes a short side base constituent portion 11 as a second member constituting most of the short side side wall portion 8 including the outer region, and a short side inner surface constituent portion 13 as a first member forming a short side internal space 12 (see Figs. 20 and 21) between the short side base constituent portion 11 and the inner surface of the short side base constituent portion 11. In this embodiment, the short side base constituent portion 11 and the short side inner surface constituent portion 13 are made of polypropylene.

[0018] As shown in Figures 8 and 9, the short side base component 11 includes 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 edge) of the extending wall portion 17. The short side outer surface base wall portion 15 includes a generally rectangular frame-shaped second mating wall portion 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 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. The short side frame wall portion 19 is provided with a pair of short side axis protrusions 20 which protrude laterally of the short side base constituent portion 11 from the lower part of the outer surface of the portions of the short side frame wall portion 19 which correspond to the left and right side edges of the lower wall portion 18, 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] As shown in Fig. 9, Fig. 20, and Fig. 21, 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 the inner side of the container body 2. More specifically, the short side frame wall 19 has a short side inner end wall 23a as a second inner end wall and a short side outer end wall 23b as a second outer end wall, which are spaced apart from each other and face 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 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 9 and 21, 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, 9, 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. 10, 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 as a first mating wall part 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. 11, a short side insertion end wall part 29 as a first end wall part 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. 20 and 21, the short side insertion end 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 end wall part 23a and the short side outer end wall part 23b are fitted to the short side insertion end 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 foamed polyurethane, 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 the raw material liquid is poured into the short side inner space 12. Furthermore, the short side base constituent part 11 and the short side inner surface constituent part 13 only abut at the short side frame wall part 19 and the short side orthogonal wall part 28, and the raw material liquid is poured relatively smoothly into the entire area of ​​the short side inner space 12. In addition, since the above-mentioned activated surface treatment is applied to the surface that defines 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. In this embodiment, the entire surface of the short side base constituent part 11 and the short side inner surface constituent part 13 that defines the short side inner space 12 corresponds to the activated surface treated area. The heat insulating member 10 is also provided in the long side wall portion 9 and the bottom wall constituting portion 4 described later in the same manner. Although the lid body 3 is not subjected to the activation surface treatment, the raw material liquid of the heat insulating member 10 is injected and solidified in the same manner. In addition, the 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 constituting portion 4, and the lid body 3 are provided in recesses formed on the mounting surface so that the plugs 30b attached to the injection ports 30a do not protrude from the mounting surface. As shown in FIG. 1 and FIG. 8, the injection port 30a of the short side side wall portion 8 is provided on one side of the short side frame wall portion 19.

[0023] 12 and 15, each long side side wall portion 9 includes a long side base constituent portion 31 as a second member constituting most of the long side side wall 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. 21 and 22) 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 12, 13, 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 inside of the container body 2, curved protrusions 37 which protrude downward from multiple points on the lower edge of the long side frame wall portion 36 and have an approximately semicircular shape with a curved lower side when the long side base component 31 is viewed from the side (side edge side), and a pair of long side shaft protrusions 38 which protrude laterally of the long side base component 31 from the curved protrusions 37 provided on both sides of the lower edge of the long side frame wall portion 36.

[0025] As shown in Fig. 13, 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 edge 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 inner side of 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, 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 second mating wall (hereinafter referred to as "long-side base mating wall 41").

[0026] 13, 14, 21 and 22, 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 as a second inner end wall portion and a long side outer end wall 42b as a second outer end wall portion, which are spaced apart from each other and face each other in the inner and outer circumferential directions of the long side base mating wall 41, and a long side insertion space 42c opening toward 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] 13, 14 and 22, 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. 13, 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 farther inwardly of the container body 2 than the other portions of the long side outer tip wall portion 42b, and also protrudes farther 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 farther inwardly of the container body 2). The curved protrusion 37 is provided to protrude downwardly from the long side outer tip wall portion 42b.

[0028] 7 and 12, 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. 15, 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 as a generally rectangular frame-shaped first mating wall part extending from the outer peripheral edge of the long side inner surface base wall part 49 to the outer side of the container body 2. A long side insertion tip wall part 51 as a first tip wall part 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. 21 and 22, 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 side 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 15, 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. 16 to 18, the bottom wall constituent part 4 includes a bottom wall base constituent part 61 as a second member constituting most of the bottom wall constituent part 4 including the upper part, and a bottom wall lower surface constituent part 63 as a first member constituting the lower surface side of the bottom wall part 5 and forming a bottom wall internal space 62 (see Figs. 20 and 22) 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. 16, the bottom wall base constituent part 61 includes a bottom wall upper surface base wall part 64 constituting the upper surface 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 portions 74 in this embodiment are provided at the lower portions of the short side base shaft wall portions 69. As shown in Fig. 23, the short side shaft protrusions 20 are inserted into the short side bearing portions 74 and are substantially fitted to an extent that rotation of the short side shaft protrusions 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. 16 and 23, a short side shaft guide groove portion 75 is provided in the short side base shaft wall portion 69, extending substantially vertically from a position slightly spaced upward from the short side bearing portions 74 to the upper edge portion of the short side base shaft wall portion 69.

[0034] As shown in Figure 16 etc., the long side base portion 7 comprises a long side base inner lower vertical wall portion 77 extending upward from the long side edge of the bottom wall upper surface base wall portion 64, a long side base middle wall portion 78 extending from the upper edge of the long side base inner lower vertical wall portion 77 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] As shown in FIG. 16, the long-side base portion 7 has a rotation-permitting recess 82 that allows the curved protrusion 37 of the long-side side wall portion 9 to be inserted between the long-side base middle wall portion 78 and the long-side base inner lower vertical wall portion 77 (see FIG. 22). The rotation-permitting 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 curved protrusion 37. The long-side bearing portion 83 of this embodiment is provided at a portion of the short-side base inner lower vertical wall portion 66 of the short-side base portion 6 that faces the rotation-permitting recess 82 provided at both ends of the long-side base portion 7. The long-side shaft protrusion 38 is inserted into the long-side bearing portion 83, and is approximately fitted to an extent that rotation of the long-side shaft protrusion 38 is permitted. As a result, the long side side wall portion 9 is rotatably connected (axially supported) to the short side base portion 6. In particular, in this embodiment, the long side bearing portion 83 is provided from the lower edge portion to the upper edge portion of the lower vertical wall portion 66 inside the short side base. In other words, when the long side side wall portion 9 is in the folded posture (the short side side wall portion 8 remains in the upright posture), the long side 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 posture 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). Note that, as shown in FIG. 16, 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 (the long side base portion 7 side). The upper surface of the stopper 83a is inclined to allow the long side shaft protrusion 38 to be inserted relatively smoothly into the long side bearing portion 83, and the lower surface of the stopper 83a forms an angle nearly perpendicular 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 portion of the long side side wall portion 9 being inclined too far to the right or left when the long side side wall portion 9 is in the folded position. The stopper 83a does not protrude outside the long side bearing portion 83 (does not protrude inward of the container body 2 beyond the lower vertical wall portion 66 inside the short side base).

[0036] As shown in FIG. 17, in this embodiment, the lower portion of the short-side base outer vertical wall portion 71 and the long-side base outer vertical wall portion 81 has 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 as a second inner end wall portion and a bottom wall outer end wall portion 84b as a second outer end wall portion, which are spaced apart from each other 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.

[0037] As shown in Fig. 18 and Fig. 19, 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 as a first mating wall portion protruding upward from the outer periphery of the bottom wall lower surface base wall portion 86. As shown in Fig. 4 and Fig. 18, the outer periphery of the bottom wall lower surface base wall portion 86 is formed into a convex shape protruding downward, and ribs protruding downward are provided in a lattice pattern on the inner periphery of the outer periphery of the bottom wall lower surface base wall portion 86 on the underside of the bottom wall lower surface base wall portion 86. The bottom wall orthogonal wall portion 87 extends upward from the bottom wall lower surface base wall portion 86 in a generally vertical direction, and further extends from its tip edge toward the outer side of the container body 2, and further extends upward approximately vertically across a curved portion to form a stepped shape.

[0038] 18, 19, etc., an upper portion of the bottom wall orthogonal wall portion 87 is provided with a bottom wall insertion tip wall portion 88 as a first tip wall portion 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 20, 22, 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.

[0039] 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. 24) 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.

[0040] As shown in Figures 20 and 21, 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 constituent portion 11 and the short side inner surface constituent 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). In addition, as shown in Fig. 21, 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 arranged 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 arranged above, and the heat insulating member 10 of the bottom wall constituent portion 4 is arranged below (see Fig. 23). Moreover, as shown in Fig. 21, 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).

[0041] 22, 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 curved 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. 16, 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.

[0042] 3, 16, 20, 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 pair of left and right, 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.

[0043] 3, 8, 20, 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 extending wall portion 17.

[0044] 20 and 21, by placing 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.

[0045] 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.

[0046] In addition, when only the short side wall 8 is in the 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. 16 and 20). 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.

[0047] 6, the lid 3 is configured to be able to cover the folded container body 2 by being placed on the upper surface of the short-side base portion 6 (short-side base upper wall portion 70). At this time, as shown in FIG. 24, the lower surface side of the lid 3 is supported not only by the upper surface of the short-side base upper wall portion 70 but also by the upper side portion (upper surface) of the base side engagement portion 103 provided on the same plane as the upper surface of the short-side base upper wall portion 70.

[0048] 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.

[0049] 10 and 11, the short-side insertion tip wall 29 of the short-side orthogonal wall 28 of the short-side inner surface constituent part 13 of the short-side sidewall 8 is provided with a short-side peripheral protrusion 111 that protrudes from the short-side insertion tip wall 29 to the outer periphery of the short-side orthogonal wall 28 at a position between the tip 29a and the base end 29b in the insertion direction into the short-side insertion space 23c (the intermediate position of the short-side insertion tip wall 29 in the thickness direction of the short-side sidewall 8) and is formed over the entire circumferential area of ​​the short-side orthogonal wall 28. In addition, the tip 29a of the short-side insertion tip wall 29 is provided with short-side tip notches 112 at a plurality of positions, and the short-side peripheral protrusion 111 is provided with a short-side intermediate notch 113 at a position different from the position where the short-side tip notch 112 is formed in the circumferential direction of the short-side orthogonal wall 28.

[0050] 20 and 21, in the assembled state of the short-side base component 11 and the short-side inner surface component 13, the inner peripheral surface of the short-side insertion tip wall 29 abuts (or is close to) the outer peripheral surface of the short-side inner tip wall 23a, and the tip 29a of the short-side insertion tip wall 29 abuts (or is close to) the short-side frame wall 19 (a portion connecting the short-side inner tip wall 23a and the short-side outer tip wall 23b). Furthermore, the tip of the short-side peripheral protrusion 111 abuts (or is close to) the inner peripheral surface of the short-side outer tip wall 23b, and the tip of the short-side outer tip wall 23b abuts (or is close to) the short-side orthogonal wall 28 (a surface on the outer side of the container body 2 of a portion not thinned that is connected to the short-side insertion tip wall 29).

[0051] The short side insertion tip wall 29, the short side inner tip wall 23a, and the short side outer tip wall 23b basically extend linearly, and a short side first space 114 is provided between a portion of the short side insertion tip wall 29 closer to the tip 29a of the short side insertion tip wall 29 than the short side peripheral protrusion 111 and the short side outer tip wall 23b. Further, a short side second space 115 is provided between a portion of the short side insertion tip wall 29 closer to the base end 29b of the short side insertion tip wall 29 than the short side peripheral protrusion 111 and the short side outer tip wall 23b.

[0052] 15 and other figures, the long side insertion tip wall portion 51 is also provided with a long side peripheral protrusion 117 that protrudes from the long side insertion tip wall portion 51 to the outer periphery of the long side orthogonal wall portion 50 at an intermediate position of the long side insertion tip wall portion 51 in the thickness direction of the long side side wall portion 9 and is formed over the entire circumferential direction of the long side orthogonal wall portion 50. In addition, long side tip notches 118 are provided at multiple positions at the tip of the long side insertion tip wall portion 51, and long side intermediate notches 119 are provided in the long side peripheral protrusion 117 at positions different from the positions at which the long side tip notches 118 are formed in the circumferential direction of the long side orthogonal wall portion 50.

[0053] 21 and 22, in the assembled state of the long side base component 31 and the long side inner surface component 33, the inner peripheral surface of the long side insertion tip wall 51 abuts (or is close to) the outer peripheral surface of the long side inner tip wall 42a, and the tip of the long side insertion tip wall 51 abuts (or is close to) the long side base mating wall 41 (the portion connecting the long side inner tip wall 42a and the long side outer tip wall 42b). In addition, the tip of the long side peripheral protrusion 117 abuts (or is close to) the inner peripheral surface of the long side outer tip wall 42b, and the tip of the long side outer tip wall 42b abuts (or is close to) the long side orthogonal wall 50 (the outer surface of the container body 2 of the non-thinned portion connected to the long side insertion tip wall 51).

[0054] A long side first space 120 is provided between a portion of the long side insertion tip wall portion 51 closer to the tip end of the long side insertion tip wall portion 51 than the long side peripheral protrusion 117 and the long side outer tip wall portion 42b. A long side second space 121 is provided between a portion of the long side insertion tip wall portion 51 closer to the base end of the long side insertion tip wall portion 51 than the long side peripheral protrusion 117 and the long side outer tip wall portion 42b.

[0055] 18 and 19, bottom wall insertion tip wall portion 88 also has a bottom wall circumferential protrusion 123 that protrudes from bottom wall insertion tip wall portion 88 to the outer circumferential side of bottom wall orthogonal wall portion 87 at an intermediate position of bottom wall insertion tip wall portion 88 in the up-down direction and is formed over the entire circumferential area of ​​bottom wall orthogonal wall portion 87. Bottom wall tip notches 124 are provided at multiple positions at the tip of bottom wall insertion tip wall portion 88, and bottom wall intermediate notches 125 are provided in bottom wall circumferential protrusion 123 at positions different from the positions at which bottom wall tip notches 124 are formed in the circumferential direction of bottom wall orthogonal wall portion 87.

[0056] 20 and 22, in the assembled state of the bottom wall base component 61 and the bottom wall lower surface component 63, the inner peripheral surface of the bottom wall insertion tip wall portion 88 abuts (or is close to) the outer peripheral surface of the bottom wall inner tip wall portion 84a, and the tip of the bottom wall insertion tip wall portion 88 abuts (or is close to) the short side base outer vertical wall portion 71 and the long side base outer vertical wall portion 81 (portion connecting the bottom wall inner tip wall portion 84a and the bottom wall outer tip wall portion 84b). In addition, the tip of the bottom wall circumferential protrusion 123 abuts (or is close to) the inner peripheral surface of the bottom wall outer tip wall portion 84b, and the tip of the bottom wall outer tip wall portion 84b abuts (or is close to) the bottom wall orthogonal wall portion 87 (the upper surface of the portion connected to the bottom wall insertion tip wall portion 88 that is not thinned).

[0057] A bottom wall first space 126 is provided between a portion of the bottom wall insertion tip wall portion 88 closer to the tip end of the bottom wall insertion tip wall portion 88 than the bottom wall circumferential protrusion 123 (upper side in this example) and the bottom wall outer tip wall portion 84b. A bottom wall second space 127 is provided between a portion of the bottom wall insertion tip wall portion 88 closer to the base end of the bottom wall insertion tip wall portion 88 than the bottom wall circumferential protrusion 123 (lower side in this example) and the bottom wall outer tip wall portion 84b.

[0058] In addition, as shown in Fig. 13, gas vent holes 129 having a size that allows gas to pass but does not (has difficulty in passing through) the raw material liquid of the heat insulating member 10 are formed in a plurality of places in the folded wall portion 39 of the long side base constituent portion 31 of the long side side wall portion 9 in the vicinity of the upper side of the long side frame wall portion 36. Furthermore, as shown in Fig. 16, gas vent holes 129 are also formed in a plurality of places in the short side base upper wall portion 70 of the bottom wall base constituent portion 61 of the bottom wall constituent portion 4. That is, the gas vent holes 129 are formed in the portions of the long side base constituent portion 31 and the bottom wall base constituent portion 61 that are formed with a substantially U-shaped cross section and are relatively distant from the butting portions with the long side inner surface constituent portion 33 and the bottom wall lower surface constituent portion 63, in order to prevent a situation in which gas remains inside the portions and the heat insulating member 10 is not formed.

[0059] As described above in detail, according to this embodiment, when the short side base component 11 and the short side inner surface component 13 are assembled, the short side insertion end wall portion 29 of the short side orthogonal wall portion 28 of the short side inner surface component 13 is inserted into the short side insertion space 23c formed between the short side inner end wall portion 23a and the short side outer end wall portion 23b of the short side frame wall portion 19 of the short side base component 11 to be in a fitted state, so that the "mating surface" of the short side orthogonal wall portion 28 and the short side frame wall portion 19, whose end edges are butted (abutted or brought into close proximity) with each other, extends in an approximately U-shaped cross section. This makes it possible to prevent the raw material liquid from leaking (solidifying at the leaking portion) to the outside of the short side side wall 8 from the butt portion between the short side orthogonal wall 28 and the short side frame wall 19 when filling and solidifying the short side internal space 12 of the short side side wall 8 formed by the short side base constituent portion 11 and the short side inner surface constituent portion 13. In particular, the short side peripheral protrusion 111 provided on the short side insertion tip wall 29 is provided so as to protrude from the short side insertion tip wall 29 to the outer periphery side of the short side orthogonal wall 28, and the inner periphery side surface of the short side insertion tip wall 29 of the short side orthogonal wall 28 can be brought into surface contact (or close proximity) with the short side inner tip wall 23a. This effectively prevents the raw material liquid of the insulation member 10 from leaking out to the outside of the short side side wall portion 8 at the portion of the mating surface between the short side orthogonal wall portion 28 and the short side frame wall portion 19 that connects to the short side internal space 12 of the short side side wall portion 8.

[0060] In addition, since the butt portions of the polypropylene short side base constituent part 11 and the short side inner surface constituent part 13 are fitted together and not joined by welding or the like, gas generated when the raw material liquid of the heat insulating member 10 solidifies (and air present in the short side internal space 12 before the raw material liquid is filled) can be discharged (pulled out) to the outside of the short side side wall part 8 through the butt portions of the short side base constituent part 11 and the short side inner surface constituent part 13. In particular, since the short side end notches 112 are provided at multiple locations on the end part 29a of the short side insertion end wall part 29 and the short side intermediate notches 113 are provided on the short side peripheral protrusion 111, gas in the short side internal space 12 of the short side side wall part 8 can be actively discharged to the outside of the short side side wall part 8 through the short side end notches 112 and the short side intermediate notches 113. This makes it possible to avoid a situation in which gas remains in the short-side internal space 12 of the short-side side wall 8, forming an area where the short-side insulating member 10 is not properly filled, thereby reducing the insulating properties of that area. As a result, the insulating member 10 is properly provided in the short-side internal space 12 of the short-side side wall 8, and the cold and heat insulation properties of the short-side side wall 8 and, ultimately, the container 1 can be improved.

[0061] Furthermore, since the short side tip notch 112 and the short side intermediate notch 113 are provided at different positions in the circumferential direction of the short side orthogonal wall portion 28, even if the raw material liquid reaches the short side tip notch 112 through a gap between the inner peripheral surface of the short side orthogonal wall portion 28 of the short side insertion tip wall portion 29 and the short side inner tip wall portion 23a, the raw material liquid can be made difficult to reach the short side intermediate notch 113 (the raw material liquid is solidified before reaching the short side intermediate notch 113). Therefore, even when the short side tip notch 112 and the short side intermediate notch 113 are provided, the raw material liquid of the heat insulating member 10 can be prevented from flowing out.

[0062] The abutting portion between the long side base constituent portion 31 and the long side inner surface constituent portion 33 of the long side sidewall portion 9 and the abutting portion between the bottom wall base constituent portion 61 and the bottom wall lower surface constituent portion 63 of the bottom wall constituent portion 4 also have the same configuration as that of the short side sidewall portion 8 described above, and the same effects are achieved for the long side sidewall portion 9 and the bottom wall constituent portion 4. Therefore, the heat insulating property of the container body 2 can be dramatically improved, and the cold and heat retention properties of the container 1 can be further improved.

[0063] In addition, a short side first space 114 is provided between a portion of the short side insertion tip wall 29 closer to the tip 29a of the short side insertion tip wall 29 than the short side peripheral protrusion 111 and the short side outer tip wall 23b. Therefore, even if the raw material liquid reaches the short side tip notch 112 through a gap between the inner peripheral surface of the short side orthogonal wall 28 of the short side insertion tip wall 29 and the short side inner tip wall 23a, the raw material liquid can be retained in the short side first space 114 as much as possible, making it more difficult for the raw material liquid to reach the short side intermediate notch 113. Therefore, the effect of preventing the raw material liquid of the heat insulating member 10 from leaking to the outside of the short side side wall 8 is more reliably achieved while avoiding a situation in which the raw material liquid of the heat insulating member 10 filled in the short side internal space 12 of the short side side wall 8 becomes insufficient (after a sufficient amount of raw material liquid is filled).

[0064] Furthermore, a short side second space 115 is provided between a portion of the short side insertion tip wall 29 closer to the base end 29b of the short side insertion tip wall 29 than the short side peripheral protrusion 111 and the short side outer tip wall 23b. Therefore, even if the raw material liquid reaches the short side intermediate notch 113 through the short side first space 114, the raw material liquid can be retained in the short side second space 115 as much as possible, and the raw material liquid can be made less likely to reach the outside of the short side insertion space 23c (the outside of the short side side wall 8). Therefore, the effect of preventing the raw material liquid of the heat insulating member 10 from leaking to the outside of the short side side wall 8 is more reliably achieved while avoiding a situation in which the raw material liquid of the heat insulating member 10 filled in the short side internal space 12 of the short side side wall 8 becomes insufficient (after a sufficient amount of raw material liquid is filled).

[0065] Furthermore, the butt joint portion between the long side base component 31 and the long side inner surface component 33 of the long side side wall portion 9, and the butt joint portion between the bottom wall base component 61 and the bottom wall underside component 63 of the bottom wall component 4 are also provided with the long side first space 120, the long side second space 121, the bottom wall first space 126, and the bottom wall second space 127, and similar effects are achieved.

[0066] In addition, in this embodiment, the entire area of ​​the short side base constituent part 11 and the short side inner surface constituent part 13 that defines the short side internal space 12 is an activated surface-treated area in which an activated surface treatment that imparts reaction activity for bonding with the heat insulating member 10 has been performed. This allows the short side base constituent part 11 and the short side inner surface constituent part 13 to be suitably bonded to the heat insulating member 10, and ultimately allows the short side base constituent part 11 and the short side inner surface constituent part 13 to be connected via the heat insulating member 10. Therefore, the short side base constituent part 11, the short side inner surface constituent part 13, and the heat insulating member 10 are integrated, which stabilizes the shape of the short side side wall part 8 and improves the strength and rigidity of the short side side wall part 8. The entire area of ​​the portion of the long side wall portion 9 that defines the long side internal space 32 and the entire area of ​​the portion of the bottom wall constituent portion 4 that defines the bottom wall internal space 62 are also made into an activated surface treatment area, and the same effect is achieved. Therefore, the shape of the container body 2 can be stabilized, and the strength and rigidity of the container body 2 can be improved. As a result, the heat insulating member 10 is suitably provided in the internal spaces 12, 32, 62 of the side wall portions 8, 9 and the bottom wall constituent portion 4, and the formation of unintended gaps and the like at the connection portions of the side wall portions 8, 9 and the bottom wall constituent portion 4 can be prevented, and the cold and heat insulation properties of the side wall portions 8, 9 and the bottom wall constituent portion 4, and ultimately the container 1 can be improved.

[0067] 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.

[0068] (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, at least one of the short side wall portions 8, the long side wall portions 9, the bottom wall component 4, and the lid body 3 is constructed by assembling two components and providing an insulating member in the internal space formed inside them.

[0069] In addition, in the above embodiment, the short side wall 8 and the long side wall 9 are connected to the bottom wall component 4 so as to be rotatably displaceable, but it is also possible to embody a container body in which the bottom wall component, the short side wall, and the long side wall are integrally configured. In this case, for example, the container body may be configured by assembling a second member constituting the upper surface of the bottom wall, the inner surfaces of the short side wall and the long side wall, the upper surfaces of the short side wall and the long side wall, and a portion including the upper part of the outer surface of the short side wall and the long side side wall, and a first member constituting the lower surface of the bottom wall and a portion including the lower part of the outer surface of the short side wall and the long side side wall, and providing a heat insulating member in the internal space. Furthermore, even if the container body is of a type in which the bottom wall component and the side wall component are integrated, a type in which the side wall component is rotatable relative to the bottom wall component, or multiple types in which the side wall components have different heights, it is possible to attach a common lid body 3 by standardizing the structure of the upper edge portion of the container body.

[0070] In addition, 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.

[0071] In the above embodiment, the container 1 is provided with the lid 3, but the present invention can also be applied 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). In a configuration in which the lid 3 is omitted, at least one of the short side wall portions 8, the long side wall portions 9, and the bottom wall constituent portion 4 is constructed by assembling two constituent portions and providing a heat insulating member in the internal space formed therein.

[0072] (b) In the above embodiment, the short side base component 11 of the short side side side wall portion 8 is provided with the short side inner tip wall portion 23a and the short side outer tip wall portion 23b, and the short side insertion tip wall portion 29 is provided in the short side inner surface component 13. However, the short side inner surface component 13 may be provided with a short side inner tip wall portion (second inner tip wall portion) and a short side outer tip wall portion (second outer tip wall portion) that are spaced apart and opposed to each other in the inner and outer circumferential directions of the short side orthogonal wall portion 28, and the short side base component 11 may be provided with a short side insertion tip wall portion (first tip wall portion) that is inserted into the short side insertion space formed between the short side inner tip wall portion and the short side outer tip wall portion (the same applies to the relationship between the long side base component 31 and the long side inner surface component 33 of the long side side side wall portion 9, and the relationship between the bottom wall base component 61 and the bottom wall underside component 63 of the bottom wall component 4). When this configuration is adopted, the short side base constituent portion 11 corresponds to a first member, and the short side inner surface constituent portion 13 corresponds to a second member.

[0073] In the above embodiment, the short side insertion tip wall portion 29 is formed so as to reduce the thickness of the outer circumferential side of the tip portion side of the short side orthogonal wall portion 28, but, for example, the short side insertion tip wall portion 29 may be made to protrude with the same thickness. When this configuration is adopted, a rib protruding outward from the short side orthogonal wall portion 28 may be provided so that the tip portion of the short side outer tip wall portion 23b abuts (or is close to) the short side orthogonal wall portion 28, or the short side orthogonal wall portion 28 may be bent in a crank shape.

[0074] (c) In the above embodiment, the positions at which the short side tip notch 112 and the short side intermediate notch 113 are formed are not particularly limited and can be changed as appropriate depending on the size of the container 1. However, the positions at which the short side tip notch 112 and the short side intermediate notch 113 are formed in the circumferential direction of the short side orthogonal wall portion 28 are different from each other (the same applies to the long side tip notch 118 and the long side intermediate notch 119, and the bottom wall tip notch 124 and the bottom wall intermediate notch 125). In addition, in the above embodiment, the short side intermediate cutout portion 113 may be provided by dividing the short side peripheral protrusion portion 111, or may be provided by leaving a portion of it (the connection portion with the short side insertion tip wall portion 29 is continuous around the entire circumference) (the same applies to the long side intermediate cutout portion 119 and the bottom wall intermediate cutout portion 125).

[0075] (d) In the above embodiment, the entire areas 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 configured to be subjected to an activation surface treatment that imparts reactive activity for bonding with the insulating member 10, but the range of the activation surface treatment may be a part of the surface that defines the short side internal space 12, or a configuration may be used in which no activation surface treatment is performed (the same applies to the long side side wall portion 9 and the bottom wall constituent portion 4). In addition, by performing the above-mentioned activation surface treatment on a part of the short side base component 11 that defines the short side internal space 12 (for example, a predetermined area on the surface of the short side outer base wall 15 on the short side internal space 12 side) and a part of the short side inner component 13 that defines the short side internal space 12 (for example, a predetermined area on the surface of the short side inner base wall 27 on the short side internal space 12 side that is arranged opposite the short side outer base wall 15), the short side base component 11 and the short side inner component 13 can be connected via the heat insulating member 10, and the shape of the short side side wall 8 can be stabilized and the strength and rigidity of the short side side wall 8 can be improved (the same applies to the long side side wall 9 and the bottom wall component 4). In addition, the activation surface treatment may also be performed on the back surface of the part formed in the approximately U-shaped cross section of the long side base component 31 and the bottom wall base component 61.

[0076] Furthermore, when the lid body 3 is constructed by connecting multiple components, the entire area defining the lid body internal space 93 by assembling an upper component that constitutes the upper surface side of the lid body 3 and a lower component that constitutes the lower surface side of the lid body 3, or even a portion of the surface that defines the lid body internal space 93, may be configured to undergo an activation surface treatment that imparts reactive activity for bonding with the insulating member 10.

[0077] (e) 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, 3...lid body, 4...bottom wall component, 5...bottom wall portion, 8...short side side wall portion, 9...long side side wall portion, 10...insulating member, 11...short side base component, 12...short side internal space, 13...short side inner surface component, 23a...short side inner end wall portion, 23b...short side outer end wall portion, 23c...short side insertion space, 29...short side insertion end wall portion, 31...long side base component, 32...long side internal space, 33...long side inner surface component, 61...bottom wall base component, 62...bottom wall internal space, 63...bottom wall underside component, 111...short side peripheral protrusion, 112...short side end notch portion, 113...short side intermediate notch portion, 114...short side first space, 115...short side second space.

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; The base portion of the bottom wall component includes a pair of side wall portions connected to be rotatable between an upright position in which the bottom wall portion is erected above each side edge portion and a folded position in which the bottom wall portion is folded toward a center portion of the bottom wall portion, and another pair of side wall portions. 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, Each of the side wall portions and the bottom wall portion is formed of a first member and a second member that forms an internal space between the first member and a second member, The first member and the second member are made of a synthetic resin, A heat insulating member made of foamed resin is provided in the internal space, An activated surface-treated region that is imparted with reaction activity for bonding with the heat insulating member is provided in at least a portion of the first member and the second member that defines the internal space, A container, wherein the insulating member is bonded to the activated surface treated region.

2. The container according to claim 1, characterized in that the first member of each side wall portion comprises an inner base wall portion having a generally rectangular shape when viewed from the front, and a first mating wall portion having a generally square frame shape extending from the outer peripheral edge of the inner base wall portion toward the outside of the container.

3. The second members of the pair of side walls each include a locking portion protruding from a side edge toward the inside of the container, The second member of the other pair of side wall portions includes a locked component that is substantially in contact with and locked to the locking component, 3. A container as claimed in claim 1 or 2, wherein the second member of each side wall defines an outer portion.

4. The second member of each of the side walls includes a pair of shaft protrusions protruding laterally, 4. A container according to claim 1, wherein the second member of the bottom wall component constitutes an upper portion of the bottom wall component and is provided with a bearing portion for rotatably supporting each of the side wall portions.

5. The other pair of side wall portions each include a pair of shaft protrusions protruding laterally, the bottom wall component includes a bearing portion for rotatably supporting the other pair of side wall portions, The bearing portion extends in a groove shape in the vertical direction, and a stopper is provided at an upper portion thereof so as to protrude from an inner surface of the bearing portion toward the inside of the container body; 4. The container according to claim 1, wherein an upper surface of the stopper is inclined, and a lower surface of the stopper forms an angle nearly perpendicular to the inner surface of the bearing portion.

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