Foldable container

Abstract

To reduce costs for providing products by enabling components to be used for various models when foldable containers are provided in various sizes.SOLUTION: A foldable container 9 includes a bottom plate 1, a mouth frame 2, a pair of swing plates 3, and a pair of foldable side plates 4. Each of the pair of foldable side plates 4 includes: a side plate body 41 which is provided so as to be foldable by a hinge portion 412; and vertical frames 43 which are respectively attached to vertical edge portions at both sides of the side plate body 41. The vertical frame 43 includes: a frame member 7 with a shaft having a rotary shaft part 73; and a frame member 8 which is connected to at least one of an upper side and a lower side of the frame member 7 with the shaft.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a collapsible container. [Background technology]

[0002] A collapsible container having a bottom plate, a mouth frame, a pair of swing plates, and a pair of foldable side plates is known.

[0003] In this type of collapsible container, the mouth frame is located above the bottom plate, and the pair of swinging plates are rotatably connected to the mouth frame. The pair of collapsible side plates can be folded into a V-shape, and are rotatably connected to the bottom plate and the mouth frame (see Patent Document 1, etc.). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2002-59926 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the conventional foldable containers described above, when providing containers of various sizes, it is difficult to standardize the components of the containers.

[0006] The problem that the present disclosure aims to solve is to reduce the cost of providing products by standardizing parts when providing foldable containers in a variety of sizes. [Means for solving the problem]

[0007] A foldable container according to one embodiment of the present disclosure includes a bottom plate, a mouth frame located above the bottom plate, a pair of swing plates rotatably connected to the mouth frame, and a pair of folding side plates rotatably connected to the bottom plate and the mouth frame. Each of the pair of folding side plates includes a side plate body having a hinge portion so as to be foldable, and vertical frames attached to vertical edge portions on both sides of the side plate body. The vertical frames include a shaft-equipped frame member having a rotating shaft portion so as to be foldable, and a frame member arranged in connection with at least one of the top and bottom of the shaft-equipped frame member. Effect of the Invention

[0008] The present disclosure provides an advantage in that, when foldable containers are provided in a variety of sizes, the cost of providing the products can be reduced by standardizing parts. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of a foldable container according to one embodiment. [Diagram 2] FIG. 2 is a side view of the foldable container. [Diagram 3] FIG. 3 is a cross-sectional view taken along line AA in FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line BB in FIG. [Diagram 5] FIG. 5 is another side view of the foldable container. [Figure 6] 6A is a cross-sectional view taken along line CC in FIG. 5, and FIG. 6B is a cross-sectional view taken along line DD in FIG. [Figure 7] 7A is a cross-sectional view taken along line EE in FIG. 5, and FIG. 7B is a cross-sectional view taken along line FF in FIG. [Figure 8] FIG. 8 is a cross-sectional view taken along line GG in FIG. [Figure 9] FIG. 9 is a perspective view of a main part of the foldable container when the rocking plate is moved. [Figure 10]FIG. 10 is an exploded perspective view of a mouth frame of the foldable container. [Figure 11] FIG. 11 is an exploded perspective view of a pair of rocking plates included in the foldable container. [Figure 12] FIG. 12 is an exploded perspective view of a bottom plate and a pair of foldable side plates included in the foldable container. [Figure 13] FIG. 13A is a perspective view of a corner member included in the mouth frame, and FIG. 13B is another perspective view of the corner member. [Figure 14] FIG. 14 is a perspective view of the foldable container of the above when folded. [Figure 15] FIG. 15A is a side view of the foldable containers folded and stacked, and FIG. 15B is a cross-sectional view taken along line HH in FIG. 15A. [Figure 16] FIG. 16 is a cross-sectional view showing a main part of a modified example of the foldable container. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] 1. One embodiment The present disclosure will be described based on the embodiments shown in the accompanying drawings, in which: Figures 1 to 15B show a collapsible container 9 according to one embodiment of the present disclosure.

[0011] 1 to 13 show the whole or part of the foldable container 9 in an assembled state, and Fig. 14 to 15B show the foldable container 9 in a folded state. The directions such as up and down, inside and outside, etc. used in the text are based on the case where the foldable container 9 in an assembled state is placed on a horizontal surface.

[0012] (Overview of foldable containers) First, an overview of a foldable container 9 according to one embodiment will be described.

[0013] As shown in Fig. 1 etc., a foldable container 9 of one embodiment includes a bottom plate 1, a mouth frame 2, a pair of swinging plates 3, and a pair of folding side plates 4. The bottom plate 1 has a rectangular outer shape in a plan view. The mouth frame 2 is located above the bottom plate 1 and has a rectangular frame-like outer shape. The pair of swinging plates 3 are connected to the mouth frame 2 so as to be rotatable relative to the mouth frame 2. The pair of folding side plates 4 are connected to the bottom plate 1 and the mouth frame 2 so as to be rotatable relative to the bottom plate 1 and the mouth frame 2.

[0014] The bottom plate 1, which is rectangular in plan view, has a longitudinal direction D1 and a transverse direction D2 that are perpendicular to each other. The longitudinal direction D1 and the transverse direction D2 are both perpendicular to the up-down direction D3. The longitudinal direction D1 of the bottom plate 1 is the overall longitudinal direction D1 of the foldable container 9. The transverse direction D2 of the bottom plate 1 is the overall transverse direction D2 of the foldable container 9.

[0015] 1 and other figures show the foldable container 9 in an assembled state. In this assembled state, the pair of rocking plates 3 and the pair of folding side plates 4 are both standing straight up from the bottom plate 1. In the assembled foldable container 9, the pair of rocking plates 3 face each other at a distance in the longitudinal direction D1 and maintain a parallel posture. The pair of folding side plates 4 face each other at a distance in the lateral direction D2 and maintain a parallel posture.

[0016] 14 shows the foldable container 9 in a folded state. In this folded state, the pair of rocking plates 3 and the pair of folding side plates 4 are both folded. The pair of rocking plates 3 are folded by rocking the pair of rocking plates 3 in a direction in which they approach each other in the longitudinal direction D1. The pair of folding side plates 4 are folded by bending them in a "L" shape in a direction in which they approach each other in the lateral direction D2.

[0017] In one embodiment of the foldable container 9, the pair of foldable side panels 4 are integrally configured with the bottom panel 1. In detail, a bottom panel body 11 (described later) included in the bottom panel 1 and a side panel body 41 (described later) included in each of the pair of foldable side panels 4 are integrally formed using a hollow structure panel made of synthetic resin (see FIG. 12).

[0018] (bottom plate) The bottom plate 1 includes a bottom plate body 11 having a rectangular shape in a plan view, and a cover member 15 provided on an outer circumferential edge portion 112 of the bottom plate body 11.

[0019] The bottom plate body 11 is formed using a hollow structure plate made of synthetic resin. The outer peripheral edge portion 112 of the rectangular bottom plate body 11 includes a pair of outer edge portions 114 extending linearly in the longitudinal direction D1 and a pair of outer edge portions 116 extending linearly in the lateral direction D2. The pair of outer edge portions 114 are long strip-shaped portions bent so as to stand upright, and are positioned parallel to each other at a distance in the lateral direction D2.

[0020] The pair of outer edge portions 116 are long pieces bent so as to stand upright, and are positioned parallel to each other at a distance in the longitudinal direction D1. A hole 118 penetrating in the longitudinal direction D1 is formed in the middle portion of each of the pair of outer edge portions 116 in the short direction D2 (see FIG. 8).

[0021] The cover member 15 is attached to the middle portion in the short-side direction D2 of each of the pair of outer edge portions 116. As shown in Figures 8 and 9, the cover member 15 has a cylindrical portion 152 that is inserted into the inside of the hole 118 of the outer edge portion 116. An engagement recess 17 that penetrates the cover member 15 in the longitudinal direction D1 is formed on the inside of the cylindrical portion 152. The engagement recess 17 has a rectangular opening that is long in the short-side direction D2 and short in the up-down direction D3.

[0022] With the cover member 15 attached to the outer edge portion 116, the engagement recesses 17 of the cover member 15 form the handle portion 5 that penetrates the outer edge portion 116 in the longitudinal direction D1. A user can insert his or her fingers into the handle portion 5 from the outside in the longitudinal direction D1.

[0023] As shown in Figures 8 and 9, the engagement recess 17 formed in the cover member 15 has protrusions 175 at both ends in the short-side direction D2. The protrusions 175 are vertically extending protrusions, in other words, protrusions that extend linearly in the up-down direction D3. The two protrusions 175 provided on both end faces of the engagement recess 17 in the short-side direction D2 face each other with a distance in between in the short-side direction D2 and are parallel to each other. The two protrusions 175 are formed on the inner ends of both end faces of the engagement recess 17 in the longitudinal direction D1.

[0024] (Mouth frame) 1 and 10, the mouth frame 2 has a rectangular outer shape in a plan view. The mouth frame 2 includes a pair of short frames 23 that respectively support the upper end portions of the pair of swinging plates 3, a pair of long frames 24 that respectively support the upper end portions of the pair of folding side plates 4, and four corner members 25 that form the four corners of the mouth frame 2.

[0025] (Pair of short frames) Each of the pair of short frames 23 has a common configuration described below.

[0026] As shown in Figure 10, the short frame 23 includes a flat upper plate 231 extending linearly in the short direction D2, an upright piece 232 standing upward from the outer end of the upper plate 231 in the longitudinal direction D1, and a first hanging piece 235 and a second hanging piece 236 hanging downward from the upper plate 231.

[0027] The upright pieces 232 of the short frame 23 function to prevent the upper foldable container 9 from shifting and falling when stacked or transported, and also function to prevent the upper foldable container 9 from shifting sideways when performing slide stacking.

[0028] The second hanging piece 236 is located outboard in the longitudinal direction D1 than the first hanging piece 235. The first hanging piece 235 and the second hanging piece 236 are parallel to each other, and the upper end portion of the rocking plate 3 is inserted between the first hanging piece 235 and the second hanging piece 236.

[0029] The upright piece 232 , the first hanging piece 235 , and the second hanging piece 236 of the short frame 23 are each formed over the entire length of the upper plate 231 .

[0030] When the foldable containers 9 of one embodiment are stacked one on top of the other, another foldable container 9 is placed on the upper surface of the upper plate 231 of the short frame 23 provided on the foldable container 9. In other words, the upper surface of the upper plate 231 of the short frame 23 constitutes the upper surface 238 of the short frame 23 used to place another foldable container 9 on it.

[0031] (A pair of long frames) Each of the pair of long frames 24 has a common configuration as described below.

[0032] The long frame 24 includes a flat upper plate 241 extending linearly in the longitudinal direction D1, an upright piece 242 standing upward from the outer end of the upper plate 241 in the longitudinal direction D1, and a first hanging piece 245 and a second hanging piece 246 hanging downward from the upper plate 241.

[0033] The upright pieces 242 of the long frame 24 function to prevent the upper foldable container 9 from shifting and falling when stacked or transported, and also function to prevent the upper foldable container 9 from shifting sideways when performing slide stacking.

[0034] The second hanging piece 246 is located outboard in the short direction D2 than the first hanging piece 245. The first hanging piece 245 and the second hanging piece 246 are parallel to each other, and the upper end portion of the folding side panel 4 is inserted between the first hanging piece 245 and the second hanging piece 246.

[0035] The upright piece 242 , the first hanging piece 245 , and the second hanging piece 246 of the long frame 24 are formed over the entire length of the upper plate 241 .

[0036] When the foldable containers 9 of one embodiment are stacked one on top of the other, another foldable container 9 is placed on the upper surface of the upper plate 241 of the long frame 24 provided on the foldable container 9. In other words, the upper surface of the upper plate 241 of the long frame 24 constitutes the upper surface 248 of the long frame 24 used to place another foldable container 9 on it.

[0037] (Corner parts) Each of the four corner members 25 has a common configuration that is described below.

[0038] As shown in Figures 13A and 13B, the corner member 25 has a main body portion 251 that is L-shaped in a planar view, an upright piece 252 that is L-shaped in a planar view and stands upward from the outer peripheral edge of the main body portion 251, a first connecting body 253 that protrudes in the longitudinal direction D1 from an end of the main body portion 251, and a second connecting body 254 that protrudes in the transverse direction D2 from another end of the main body portion 251.

[0039] The upright pieces 252 of the corner members 25 function to prevent the upper foldable container 9 from shifting and falling when stacked or transported, and also function to prevent the upper foldable container 9 from shifting sideways when slide stacking is performed.

[0040] The first connector 253 has a hollow structure that is open downward and toward one side in the longitudinal direction D1 and has a U-shaped vertical cross section. The upper end portion of the folding side panel 4 is inserted into and supported in the hollow portion of the first connector 253.

[0041] When the corner member 25 is connected to the long frame 24 , the first connector 253 of the corner member 25 is inserted into the space between the first hanging piece 245 and the second hanging piece 246 of the long frame 24 .

[0042] The second connector 254 has a hollow structure that is open downward and toward one side in the short direction D2 and has a U-shaped vertical cross section. The upper end portion of the rocking plate 3 is inserted into and supported by the hollow portion of the second connector 254.

[0043] With the corner member 25 connected to the short frame 23 , the second connector 254 of the corner member 25 is inserted into the space between the first hanging piece 235 and the second hanging piece 236 of the short frame 23 .

[0044] In addition, the corner member 25 is provided with a support leg 6. The support leg 6 extends downward from the outer circumferential edge of the main body portion 251 and has an L-shaped structure in horizontal cross section.

[0045] The support leg 6 integrally includes a flat first support wall 61 having a thickness in the longitudinal direction D1, a flat second support wall 62 having a thickness in the lateral direction D2, and a corner portion 63 smoothly connecting the first support wall 61 and the second support wall 62. The corner portion 63 has an outwardly bulging arc-shaped horizontal cross section.

[0046] 13A, the outer peripheral edge 65 of the support leg 6 is formed so as to rise outward more than other parts of the support leg 6. The outer peripheral edge 65 of the support leg 6 is formed thicker than other parts of the support leg 6. The strength of the support leg 6 is increased by the thick outer peripheral edge 65.

[0047] The thick outer peripheral edge portion 65 includes a first vertical edge portion 651 formed on the vertical edge of the first support wall 61, a second vertical edge portion 652 formed on the vertical edge of the second support wall 62, and a lower edge portion 653 connecting the lower ends of the first vertical edge portion 651 and the second vertical edge portion 652.

[0048] The first vertical edge 651 is formed in a straight line extending in the up-down direction D3 on the vertical edge of the first support wall 61 away from the corner 63. The second vertical edge 652 is formed in a straight line extending in the up-down direction D3 on the vertical edge of the second support wall 62 away from the corner 63. The first vertical edge 651 and the second vertical edge 652 have the function of increasing the strength of the support leg 6 against a load from above.

[0049] The lower edge 653 is formed at a portion where the lower edge of the first support wall 61, the lower edge of the corner portion 63, and the lower edge of the second support wall 62 are continuously connected. The lower edge 653 has a function of increasing the strength of the support leg 6 when it is placed on a floor surface or the like, and a function of increasing the installation area when the support leg 6 is placed on a floor surface or the like.

[0050] When the foldable containers 9 of one embodiment are stacked one on top of the other, another foldable container 9 is placed on the upper surface of the main body part 251 of the corner member 25 of the foldable container 9. In other words, the upper surface of the main body part 251 of the corner member 25 constitutes the upper surface 258 of the corner member 25 used to place another foldable container 9 on it.

[0051] When the first connector 253 of the corner member 25 is inserted into the end of the long frame 24 and the corner member 25 and the long frame 24 are connected to each other, the upper surface 258 of the corner member 25 is flush with and continuous with the upper surface 248 of the long frame 24 (see FIG. 1). Similarly, when the second connector 254 of the corner member 25 is inserted into the end of the short frame 23 and the corner member 25 and the short frame 23 are connected to each other, the upper surface 258 of the corner member 25 is flush with and continuous with the upper surface 238 of the short frame 23. According to the foldable container 9 of one embodiment, slide stacking can be easily performed.

[0052] When the first connector 253 of the corner member 25 is inserted into the end of the long frame 24, a gap is generated in the short direction D2 between the upper end portion of the folding side panel 4 supported by the first connector 253 and the central portion of the long frame 24 covering it. In order to prevent rattling between the folding side panel 4 and the long frame 24 due to this gap, it is preferable that a rib that abuts against the upper end portion of the folding side panel 4 is provided on the inside of the long frame 24. The rib prevents rattling from occurring between the upper end portion of the folding side panel 4 and the long frame 24, which in turn contributes to improving the strength of the foldable container 9.

[0053] Similarly, when the second connector 254 of the corner member 25 is inserted into the end of the short frame 23, a gap is generated in the longitudinal direction D1 between the upper end portion of the rocking plate 3 supported by the second connector 254 and the central portion of the short frame 23 covering it. In order to prevent rattling between the rocking plate 3 and the short frame 23 due to this gap, it is preferable that a rib that abuts against the upper end portion of the rocking plate 3 is provided on the inside of the short frame 23. The rib prevents rattling from occurring between the upper end portion of the rocking plate 3 and the short frame 23, thereby contributing to improving the strength of the foldable container 9.

[0054] The support legs 6 provided on the corner members 25 contribute to improving the strength of the foldable container 9, as described below.

[0055] Specifically, in the assembled foldable container 9, the support legs 6 of the corner members 25 abut against the vertical frames 43 (described later) of the folding side panels 4 located below them (see FIGS. 2 and 4). More specifically, the lower ends of the support legs 6 of the corner members 25 abut against the upper ends of the upper frame members 8 included in the vertical frames 43. This allows the corner members 25 and the vertical frames 43, which are structurally continuous in the up-down direction D3, to bear a load applied from above, thereby increasing the strength of the assembled foldable container 9.

[0056] Additionally, the main body 251 of the corner member 25 abuts against a vertical frame 33 (described later) of the rocking plate 3 located below it (see Figs. 5 and 6A). This allows the corner member 25 and the vertical frame 33, which are structurally continuous in the up-down direction D3, to bear the load applied from above, thereby increasing the strength of the foldable container 9 in the assembled state.

[0057] The outer surface of the support leg 6 of the corner member 25 is flush and continuous with the outer surface of the vertical frame 43 located below it (specifically, the outer surface of the upper frame member 8).

[0058] In one embodiment of the foldable container 9, the outer surfaces of the support legs 6 are flush with the outer surfaces of the vertical frames 43, so that the outer dimensions of the foldable container 9 in the short direction D2 are minimized. Therefore, when assembled foldable containers 9 are stacked, it is possible to minimize the clearance between the upright pieces 252 of the corner members 25 of the lower foldable container 9 and the bottom plate 1 of the upper foldable container 9.

[0059] When assembled foldable containers 9 are stacked, the clearance between the upper and lower foldable containers 9 (i.e., the clearance between the upright pieces 252 of each corner member 25 of the lower foldable container 9 and the bottom plate 1 of the upper foldable container 9) is set larger in the longitudinal direction D1 than in the transverse direction D2. For example, the clearance in the transverse direction D2 is 3.5 mm, and the clearance in the longitudinal direction D1 is 4 mm.

[0060] When foldable containers 9 are stacked in a folded state, the clearance between the upper and lower foldable containers 9 (i.e., the clearance between the upright pieces 252 of each corner member 25 of the lower foldable container 9 and the support legs 255 of the corner members 25 of the upper foldable container 9) is 1 mm in both the longitudinal direction D1 and the lateral direction D2.

[0061] In addition, in the assembled foldable container 9, the first support wall 61 of the support leg 6 of the corner member 25 covers an end of a hinge portion 312 (described later) of the swing plate 3. The second support wall 62 of the support leg 6 of the corner member 25 covers an end of an upper hinge portion 411 (described later) of the folding side plate 4. This protects the hinge portion 312 and the upper hinge portion 411, which are relatively weak in strength. As shown in FIG. 4, the second support wall 62 of the corner member 25 abuts against and supports the upper hinge portion 411 of the folding side plate 4 from the outside, thereby preventing the upper hinge portion 411 from being damaged even when a large load is applied from the inside.

[0062] 6B, in the assembled foldable container 9, a relatively large clearance is provided between the first support wall 61 of the support leg 6 of the corner member 25 and the rocking plate 3. This prevents the first support wall 61 of the support leg 6 and the outer edge portion 116 of the bottom plate 1 from interfering with each other in the folded state described below.

[0063] (Pair of rocking plates) 11, each of the pair of rocking plates 3 includes a rocking plate body 31 having a rectangular flat plate shape, and two vertical frames 33 attached to the rocking plate body 31. The two vertical frames 33 are attached to vertical edge portions on both sides of the rocking plate body 31 in the short side direction D2.

[0064] (Swing plate body) The rocking plate body 31 is formed using a hollow structure plate made of synthetic resin. The rocking plate body 31 has a structure in which an upper end portion 311 and a portion 313 below the upper end portion 311 are connected to each other so as to be able to rock freely via a hinge portion 312. The hinge portion 312 is formed by a cut that extends linearly in the short side direction D2.

[0065] In other words, by forming cuts on the outer surface side of the rocking plate body 31 made of synthetic resin by thermal scoring, the rocking plate body 31 is divided into an upper end portion 311 and a lower portion 313. The upper end portion 311 is the portion fixed to the mouth frame 2.

[0066] (Vertical frame) Each of the two vertical frames 33 has a common configuration as described below.

[0067] The vertical frame 33 is a member having a U-shape in horizontal cross section that is attached to the vertical edge portion of the rocking plate body 31. The vertical frame 33 constitutes the vertical edge portion of the rocking plate 3 in a state where it is attached to the rocking plate body 31.

[0068] Additionally, the vertical frame 33 is provided with an L-shaped fitting portion 34 (see Figs. 7A, 7B, 11, etc.). The fitting portion 34 has an L-shaped structure in horizontal cross section including a protruding piece protruding outward from the vertical frame 33 in the short-side direction D2 and a protruding piece protruding outward from the tip of the protruding piece in the longitudinal direction D1. The fitting portion 34 is formed over the entire length of the vertical frame 33 in the up-down direction D3.

[0069] 11, the outer corner portion 335 in the short direction D2 of the lower end portion of the vertical frame 33 is formed to have an arc-shaped outer shape. This prevents the lower corner portion of the rocking plate 3 (i.e., the corner portion 335 of the vertical frame 33) from getting caught on other members and causing damage when the rocking plate 3 is moved.

[0070] (Cover material) A cover member 35 is attached to the lower end of the rocking plate body 31. As shown in Fig. 9 and other figures, the cover member 35 is provided with an engagement protrusion 37 that protrudes outward in the longitudinal direction D1.

[0071] The engaging protrusion 37 has an outer shape that is long in the short direction D2 and short in the up-down direction D3 so that it can be inserted into the engaging recess 17 of the bottom plate 1 from the inside in the longitudinal direction D1. An upper surface 371 of the engaging protrusion 37 is a flat surface, and a lower surface 373 of the engaging protrusion 37 is an inclined surface that is positioned higher as it approaches the tip of the engaging protrusion 37. The engaging protrusion 37 is formed so that the width in the up-down direction D3 becomes narrower as it approaches the tip, and the distance between the upper surface 371 and the lower surface 373 becomes smaller.

[0072] A claw portion 375 is provided at each of both ends in the short side direction D2 of the engaging protrusion 37. The claw portion 375 has a shape that protrudes outward in the short side direction D2 from each of both ends in the short side direction D2 of the engaging protrusion 37. At each of both ends in the short side direction D2 of the engaging protrusion 37, a step is formed between the claw portion 375 and a portion closer to the base of the engaging protrusion 37 than the claw portion 375.

[0073] 8, in the assembled foldable container 9, the engagement protrusion 37 provided on the lower part of the rocking plate 3 is inserted into the engagement recess 17 of the bottom plate 1 from the inside in the longitudinal direction D1, and the engagement protrusion 37 engages with the engagement recess 17. In detail, the claw parts 375 on both sides of the engagement protrusion 37 of the rocking plate 3 are elastically hooked onto the protruding parts 175 on both sides of the engagement recess 17 of the bottom plate 1 from the outside in the longitudinal direction D1. As a result, the lower part of the rocking plate 3 is detachably locked to the outer peripheral edge part 112 of the bottom plate 1.

[0074] The rocking plate body 31, which constitutes the main part of the rocking plate 3 included in the foldable container 9 of one embodiment, is relatively lightweight due to its hollow structure, but since a cover member 35 is attached to the lower end of the rocking plate body 31, the rocking plate 3 can stably rock by its own weight when assembling the foldable container 9. In addition, since the lower corners of the rocking plate 3 (i.e., the corners 335 of the vertical frame 33) are rounded, the rocking plate 3 can rock smoothly by its own weight without getting caught on surrounding members. When assembling the foldable container 9, the rocking plate 3 rocks smoothly against air resistance, so that the hinge parts 412 of the folding side panels 4 are pushed from the inside by the rocking plate 3, and the folding side panels 4 can easily stand up.

[0075] (Pair of folding side panels) Each of the pair of folding side panels 4 includes a side panel body 41 having a rectangular flat plate shape, and two vertical frames 43 attached to the side panel body 41. The two vertical frames 43 are attached to vertical edge portions on both sides of the side panel body 41 in the longitudinal direction D1.

[0076] (Side panel body) The side plate body 41 is formed using a hollow structure plate made of synthetic resin. As shown in Fig. 12 etc., the side plate body 41 has a hinge portion 412 in the middle of the side plate body 41 in the up-down direction D3, and an upper hinge portion 411 at the top of the side plate body 41. A lower hinge portion 413 is formed between the side plate body 41 and the outer edge portion 114 of the bottom plate 1 located below it, to foldably connect the two.

[0077] The portion of side plate main body 41 above upper hinge portion 411 is upper end portion 414 of side plate main body 41, and an upper flat plate portion 416 is formed between upper hinge portion 411 and hinge portion 412. A lower flat plate portion 417 is formed between lower hinge portion 413 and hinge portion 412 of side plate main body 41. When side plate main body 41 is folded, it is folded so that upper flat plate portion 416 and lower flat plate portion 417 overlap one another vertically, forming an overall "L" shape.

[0078] The upper hinge portion 411 and the lower hinge portion 413 are formed by forming linearly extending cuts in the longitudinal direction D1 from the inner surface side of a hollow structure plate made of synthetic resin by thermal scoring.

[0079] The intermediate hinge portion 412 is formed by forming a linear cut in the longitudinal direction D1 from the inner surface of the synthetic resin hollow structure plate by thermal scoring. As shown in Figures 2 and 3, the hinge portion 412 in the upper and lower intermediate portions of the side plate body 41 includes a long piece portion 415 that is formed thinner than the surrounding portions.

[0080] Long piece 415 included in hinge portion 412 extends linearly in longitudinal direction D1 and has a predetermined width W1 in up-down direction D3. Predetermined width W1 is preferably, for example, 2 mm or more.

[0081] That is, in the foldable container 9 of one embodiment, a thin long piece portion 415 extending left and right is interposed between an upper flat plate portion 416 and a lower flat plate portion 417 of the side plate body 41 of the folding side plate 4. The thin long piece portion 415 is formed by being crushed with a heated blade during the thermal scoring process for forming the hinge portion 412. The long piece portion 415 is formed integrally with the upper and lower flat plate portions 416, 417.

[0082] (Vertical frame) Each of the two vertical frames 43 has a common configuration as described below.

[0083] The vertical frame 43 is a frame having a U-shape in horizontal cross section that is attached to the vertical edge portion of the side panel main body 41. The vertical frame 43 constitutes the vertical edge portion of the folding side panel 4 when attached to the side panel main body 41.

[0084] The vertical frame 43 is composed of multiple parts. Specifically, the vertical frame 43 is composed of a shaft frame member 7 and upper and lower frame members 8 arranged so as to be connected to the top and bottom of the shaft frame member 7. The shaft frame member 7 is a member formed by injection molding, and the upper and lower frame members 8 are members formed by extrusion molding.

[0085] (Frame member with shaft) As shown in FIG. 7B, FIG. 12 and the like, the shaft-mounted frame member 7 is a member having a U-shaped horizontal cross section.

[0086] The shaft-equipped frame member 7 has an upper member 71, a lower member 72, and a rotating shaft portion 73. The upper member 71 and the lower member 72, which have a U-shaped horizontal cross section, are rotatably connected via the rotating shaft portion 73. The rotating shaft portion 73 includes a shaft portion 731 molded integrally with the upper member 71 by injection molding, and a shaft portion 732 molded integrally with the lower member 72 by injection molding (see FIG. 9). The shaft-equipped frame member 7 can be freely folded as a whole into a V-shape via the rotating shaft portion 73 located midway between the top and bottom of the shaft-equipped frame member 7.

[0087] 2, when the side panel body 41 of the folding side panel 4 is viewed from the front, the rotating shafts 73 of the shaft frame members 7 and the long pieces 415 of the side panel body 41 are positioned on the same straight line. The straight line here is an imaginary straight line extending in the longitudinal direction D1. In other words, when the side panel body 41 of the folding side panel 4 is viewed from the front, the rotating shafts 73 of the two shaft frame members 7 are positioned on the extension lines of the long pieces 415 extending to the left and right.

[0088] By attaching the shaft-equipped frame member 7 to the side plate main body 41, the side plate main body 41 is reinforced, and even if a load is applied to the side plate main body 41, damage such as tearing of the hinge portion 412 of the side plate main body 41 is suppressed.

[0089] 7B and other figures, the shaft frame member 7 is provided with an L-shaped fitting portion 74. The fitting portion 74 is used to lock the rocking plate 3 in an upright position.

[0090] As shown in FIG. 12, the L-shaped fitting portion 74 includes an L-shaped fitting portion 714 of the upper member 71 and an L-shaped fitting portion 724 of the lower member 72.

[0091] The fitting portion 714 of the upper member 71 has an L-shaped structure in horizontal cross section, including a protruding piece protruding inward in the short direction D2 from the upper member 71 and a protruding piece protruding inward in the longitudinal direction D1 from the tip of the protruding piece. The fitting portion 714 is formed over the entire length of the upper member 71 in the up-down direction D3.

[0092] The fitting portion 724 of the lower member 72 has an L-shaped structure in horizontal cross section, including a protruding piece protruding inward in the short direction D2 from the lower member 72 and a protruding piece protruding inward in the longitudinal direction D1 from the tip of the protruding piece. The fitting portion 724 is formed over the entire length of the lower member 72 in the up-down direction D3.

[0093] The upper and lower middle portions of the L-shaped fitting portion 34 provided on the vertical frame 33 of the oscillating plate 3 are fitted into the L-shaped fitting portion 74 (i.e., the fitting portions 714, 724 of the upper member 71 and the lower member 72) provided on the shaft-equipped frame member 7 from the inside in the longitudinal direction D1.

[0094] (Frame member) Each of the upper and lower frame members 8 has a common configuration as described below.

[0095] As shown in FIG. 7A etc., the frame member 8 is a member having a U-shaped cross section that is attached to a vertical edge portion of the side plate main body 41.

[0096] The frame member 8 is provided with an L-shaped fitting portion 84. The fitting portion 84 is used to lock the rocking plate 3 in an upright position. The fitting portion 84 has an L-shaped structure in horizontal cross section including a protruding piece protruding inward in the short direction D2 from the frame member 8 and a protruding piece protruding inward in the longitudinal direction D1 from the tip of the protruding piece. The fitting portion 84 is formed over the entire length of the frame member 8 in the up-down direction D3.

[0097] An upper portion of the L-shaped fitting portion 34 provided on the vertical frame 33 of the rocking plate 3 fits into the L-shaped fitting portion 84 provided on the upper frame member 8 from the inside in the longitudinal direction D1. A lower portion of the L-shaped fitting portion 34 provided on the vertical frame 33 of the rocking plate 3 fits into the L-shaped fitting portion 84 provided on the lower frame member 8 from the inside in the longitudinal direction D1.

[0098] In the assembled foldable container 9, the fitting portions 84 of the upper and lower frame members 8 and the fitting portion 74 of the shaft-equipped frame member 7 are vertically connected to each other. More specifically, the fitting portion 84 of the upper frame member 8, the fitting portion 714 of the upper member 71 of the shaft-equipped frame member 7, the fitting portion 724 of the lower member 72 of the shaft-equipped frame member 7, and the fitting portion 84 of the lower frame member 8 are vertically connected to each other.

[0099] (folded state) The foldable container 9 in the folded state will be described with reference to FIG. 14 etc.

[0100] In the foldable container 9 in the folded state, the pair of rocking plates 3 are folded in a direction approaching each other in the longitudinal direction D1 via the hinge parts 312 of the rocking plate main body 31 described above. The pair of folding side plates 4 are folded in a "L" shape in a direction approaching each other in the short direction D2 via the upper hinge part 411, the hinge part 412, and the lower hinge part 413 described above.

[0101] The pair of folded folding side panels 4 are positioned below the pair of folded rocking panels 3. The pair of folded folding side panels 4 are positioned side by side in the short direction D2 with a gap S1 between them (see FIG. 15). The gap S1 between the pair of folding side panels 4 is positioned between the handle portions 5 on both sides of the bottom panel 1 in the longitudinal direction D1 (i.e., between the engagement recesses 17 on both sides).

[0102] In the folded foldable container 9, the support legs 6 provided on each corner member 25 are positioned so as to cover from the outside the corners of the outer peripheral edge portion 112 of the bottom plate 1. In detail, the first support wall 61 included in the support leg 6 is positioned so as to cover the end of the standing outer edge portion 116 of the bottom plate 1 from the outside in the longitudinal direction D1, and the second support wall 62 included in the support leg 6 is positioned so as to cover the end of the standing outer edge portion 114 of the bottom plate 1 from the outside in the transverse direction D2.

[0103] (Stacked state) 15A and 15B, a case where foldable containers 9 in a folded state are stacked one on top of the other will be described.

[0104] In the following, the upper foldable container 9 of the two stacked foldable containers 9 will be referred to as the upper foldable container 9U, and the lower foldable container 9 will be referred to as the lower foldable container 9L.

[0105] In the vertically stacked state, the bottom plate 1 of the upper foldable container 9U is placed on the mouth frame 2 of the lower foldable container 9L. In detail, the bottom plate 1 is placed on the upper surfaces 258 of the four corner members 25 included in the mouth frame 2 of the lower foldable container 9L, the upper surfaces 238 of the pair of short frames 23, and the upper surfaces 248 of the pair of long frames 24.

[0106] Furthermore, the support legs 6 of the four corner members 25 of the upper foldable container 9U are placed one-to-one on the upper surfaces 258 of the four corner members 25 of the lower foldable container 9L. In other words, the lower end surface of the support leg 6 of the corresponding corner member 25 of the four corner members 25 of the upper foldable container 9U abuts on the upper surface 258 of each corner member 25 of the lower foldable container 9L.

[0107] In addition, when the lower foldable container 9 is placed on the floor, the lower ends of the support legs 6 of the four corner members 25 of the lower foldable container 9 each come into contact with the floor surface to support the load.

[0108] As a result, when foldable containers 9 in a folded state are stacked one on top of the other, even if a large load is applied from above, damage to the stacked foldable containers 9 is effectively prevented.

[0109] (Size expansion available) According to the foldable container 9 of the embodiment described above, when the foldable containers 9 are provided in a variety of sizes, the cost of providing the products can be reduced by standardizing the parts.

[0110] In other words, in one embodiment of the foldable container 9, the vertical frame 43 included in the folding side panel 4 is composed of the axis-mounted frame member 7 and the upper and lower frame members 8, so that when providing the foldable container 9 in a variety of sizes, it is possible to accommodate this by standardizing the axis-mounted frame member 7 and changing the size of the upper and lower frame members 8.

[0111] Similarly, in one embodiment of the foldable container 9, the mouth frame 2 is composed of four corner members 25 and a pair of short frames 23 and a pair of long frames 24 that connect them, so that when providing the foldable container 9 in a variety of sizes, this can be accommodated by standardizing the four corner members 25 and changing the size of both or one of the pair of short frames 23 and the pair of long frames 24.

[0112] As described above, in one embodiment of the foldable container 9, when the foldable containers 9 are provided in a variety of sizes, the axis-mounted frame members 7 and corner members 25 can be standardized, thereby making it possible to reduce the cost of providing the product.

[0113] 2. Variations The above-described embodiment is merely one of various embodiments of the present disclosure, and various modifications are possible depending on the design, etc., as long as the object of the present disclosure can be achieved.

[0114] Various modified examples are listed below. The modified examples listed below can be applied in appropriate combination. In the description of the modified examples, the same reference numerals are used for configurations similar to those of the above-described embodiment, and detailed description thereof will be omitted.

[0115] FIG. 16 shows a cross section of a main part of the folding side panel 4 of a modified example of the foldable container 9. In this modified example, the long piece portion 415 included in the hinge portion 412 of the side panel main body 41 has a protruding portion 4152 protruding inward in the short-side direction D2. The protruding portion 4152 is provided in the middle of the long piece portion 415 in the up-down direction D3, and is formed over the entire length of the long piece portion 415 in the longitudinal direction D1. The protruding portion 4152 is a triangular portion in vertical cross section formed so that the width in the up-down direction D3 becomes narrower toward the inner side in the short-side direction D2. Since the long piece portion 415 has the protruding portion 4152, a pair of hinges 4121, 4222 are formed above and below the protruding portion 4152 in the hinge portion 412 of the modified example.

[0116] In this modification, upper flat plate portion 416 of hinge portion 412 bends around upper hinge 4121, and lower flat plate portion 417 of hinge portion 412 bends around lower hinge 4122. That is, according to this modification, the portion around which upper flat plate portion 416 of hinge portion 412 bends and the portion around which lower flat plate portion 417 of hinge portion 412 bend are clearly defined.

[0117] In the folding side panel 4 of the foldable container 9 of one embodiment, a pair of frame members 8 are attached to the side panel main body 41 so as to be connected above and below the frame member 7 with shafts, but it is sufficient that the frame members 8 are arranged at least either above or below the frame member 7 with shafts. Also, in the foldable container 9 of one embodiment, the upper and lower frame members 8 have the same dimensions and shapes, but the upper and lower frame members 8 may have different dimensions and shapes. For example, the length dimensions (i.e., the dimensions in the vertical direction D3 in the assembled state) of the upper and lower frame members 8 may differ from each other.

[0118] In one embodiment of the foldable container 9, both the shaft-mounted frame member 7 and the frame member 8 have a U-shaped cross section, but the shapes of the shaft-mounted frame member 7 and the frame member 8 are not limited to this; for example, the shaft-mounted frame member 7 may be a member having an L-shaped cross section, and the frame member 8 may be a member having an L-shaped cross section.

[0119] In one embodiment of the foldable container 9, the hinge portion 412 of the side plate main body 41 is configured by a cut made by thermal scoring, but is not limited thereto, and for example, the hinge portion 412 may have a structure similar to the rotation shaft portion 73 of the shaft-equipped frame member 7. This is the same for the upper hinge portion 411 and the lower hinge portion 413 of the side plate main body 41, and also for the hinge portion 312 of the rocking plate main body 31.

[0120] In one embodiment of the foldable container 9, the hinge portion 412 of the side panel main body 41 includes a thin long piece 415, but is not limited to this and can also be configured, for example, as a V-shaped notch that does not include the long piece 415.

[0121] In one embodiment of the foldable container 9, the axis-mounted frame member 7 has an L-shaped fitting portion 74, and the frame member 8 has an L-shaped fitting portion 84, but this is not limited to this, and it is also possible that the frame member 7 does not have fitting portions 74, 84, or that the frame member 8 has a fitting portion of another shape.

[0122] In one embodiment of the foldable container 9, the lower end surfaces of the support legs 6 of the mouth frame 2 are at the same height as the lower surface of the bottom plate 1, but this is not limited thereto, and the lower end surfaces of the support legs 6 may be located higher than the lower surface of the bottom plate 1, or the lower end surfaces of the support legs 6 may be located lower than the lower surface of the bottom plate 1. In either case, it is preferable that the support legs 6 of the four corner members 25 of the upper foldable container 9U are configured to abut against the four corner members 25 of the lower foldable container 9L when the foldable containers 9 are stacked one on top of the other in the folded state.

[0123] In one embodiment of the foldable container 9, the support legs 6 of the four corner members 25 are configured to abut against the vertical frame 43 of the folding side panel 4 in the assembled state, but this is not limited thereto, and as long as the support legs 6 and the vertical frame 43 abut when a load is applied from above, a gap may be formed between the support legs 6 and the vertical frame 43 in the normal assembled state.

[0124] In one embodiment of the foldable container 9, the main body parts 251 of the four corner members 25 are configured to abut against the vertical frame 33 of the rocking plate 3 in the assembled state, but this is not limited to this, and as long as the main body parts 251 and the vertical frame 33 abut when a load is applied from above, a gap may be formed between the main body parts 251 and the vertical frame 33 in the normal assembled state.

[0125] In one embodiment of the foldable container 9, the engagement recess 17 is formed through the bottom plate 1 to form the handle portion 5, but is not limited to this and may be formed, for example, as a non-through recess in the outer peripheral edge portion 12 of the bottom plate main body 11.

[0126] In the foldable container 9 of one embodiment, the engagement recess 17 is provided with a protrusion 175, and the engagement protrusion 37 is provided with a claw 375, but the present invention is not limited to this, and other configurations can be adopted as long as the engagement recess 17 and the engagement protrusion 37 engage with each other. Note that, when the protrusions 175 are provided on both the left and right ends of the engagement recess 17, as in the foldable container 9 of one embodiment, there is an advantage that the protrusions 175 are prevented from hitting the hand when the engagement recess 17 is used as a handle 5.

[0127] 3. Summary As described based on the above embodiment and various modified examples, the foldable container 9 according to the first aspect of the present disclosure includes a bottom plate 1, a mouth frame 2 located above the bottom plate 1, a pair of swinging plates 3 rotatably connected to the mouth frame 2, and a pair of folding side plates 4 rotatably connected to the bottom plate 1 and the mouth frame 2. Each of the pair of folding side plates 4 includes a side plate main body 41 provided so as to be foldable by having a hinge portion 412, and vertical frames 43 respectively attached to vertical edge portions on both sides of the side plate main body 41. The vertical frames 43 include an axle-equipped frame member 7 provided so as to be foldable by having a rotating shaft portion 73, and a frame member 8 arranged in series with at least one of the top and bottom of the axle-equipped frame member 7.

[0128] According to this embodiment, when providing foldable containers 9 in various sizes, this can be achieved by standardizing the shaft-equipped frame members 7 of the vertical frame 43 and changing the size of the frame members 8 connected thereto. In other words, according to this embodiment, when providing foldable containers 9 in various sizes, the cost of providing the product can be reduced by standardizing parts.

[0129] In the first embodiment of the foldable container 9 according to the second aspect of the present disclosure, the hinge portion 412 of the side plate main body 41 includes a long piece portion 415 that is formed thinner than the surrounding portions. The long piece portion 415 extends linearly in the left-right direction and has a predetermined width W1 in the up-down direction. When the side plate main body 41 is viewed from the front, the rotation shaft portion 73 of the shaft-equipped frame member 7 and the long piece portion 415 of the side plate main body 41 are positioned on the same straight line.

[0130] According to this embodiment, when the folding side panel 4 is folded around the rotation shaft portion 73 of the shaft frame member 7, the side panel main body 41 is folded around the thin long piece portion 415. This reduces the rebound of the long piece portion 415 when folded, making it easier to fold the folding side panel 4 compactly.

[0131] In the foldable container 9 according to the third aspect of the present disclosure, in the first or second aspect, the axis-mounted frame member 7 and the frame member 8 each have an L-shaped cross-sectional fitting portion 74, 84 into which a vertical edge portion of a corresponding one of a pair of oscillating plates 3 fits from the inside.

[0132] According to this embodiment, the occurrence of a gap between the rocking plate 3 and the folding side plate 4 is suppressed, and even when a load is applied to the rocking plate 3 from inside, the rocking plate 3 is prevented from coming off.

[0133] In the foldable container 9 according to a fourth aspect of the present disclosure, in any one of the first to third aspects, the mouth frame 2 includes four corner members 25 that form the four corners of the mouth frame 2. Each of the four corner members 25 has a support leg 6 extending downward. When the foldable container 9 is in an assembled state, the support leg 6 is configured to abut against the vertical frame 43 located below it.

[0134] According to this embodiment, even if a large load is applied from above to the foldable container 9 in the assembled state, such as when the foldable containers 9 are stacked in layers, the load can be supported by the support legs 6 of the foldable container 9 and the vertical frame 43 that corresponds to the support legs 6. This prevents damage to the foldable container 9. The support legs 6 of the corner member 25 only need to abut against the vertical frame 43 at least when a load is applied from above, and a gap may be formed between the support legs 6 and the vertical frame 43 under normal conditions. In other words, in this embodiment, the configuration in which the support legs 6 abut against the vertical frame 43 includes a case in which a gap is formed between the support legs 6 and the vertical frame 43 under normal conditions and the support legs 6 abut against the vertical frame 43 when a load is applied from above.

[0135] In a foldable container 9 according to a fifth aspect of the present disclosure, in any one of the first to third aspects, the mouth frame 2 includes four corner members 25 that form the four corners of the mouth frame 2. Each of the four corner members 25 has a support leg 6 extending downward. When the foldable containers 9 are stacked one above the other in a folded state, the support legs 6 of the four corner members 25 of the upper foldable container 9 (9U) are configured to abut against the four corner members 25 of the lower foldable container 9 (9L).

[0136] According to this embodiment, even if a large load is applied from above when foldable containers 9 are stacked in a folded state, the load can be received by the vertically overlapping corner members 25, thereby preventing damage to the folding side panels 4, the oscillating panel 3, the bottom panel 1, etc. of the foldable containers 9.

[0137] In the foldable container 9 according to a sixth aspect of the present disclosure, in any one of the first to fifth aspects, the rocking plate 3 has a rocking plate main body 31 and an engagement protrusion 37 provided on the lower part of the rocking plate main body 31. The bottom plate 1 has a bottom plate main body 11 and an engagement recess 17 provided on an outer circumferential edge part 112 of the bottom plate main body 11. When the foldable container 9 is in an assembled state, the engagement protrusion 37 is inserted into and engaged with the engagement recess 17 from the inside. The engagement recess 17 constitutes a handle part 5 into which a finger can be inserted from the outside.

[0138] According to this embodiment, in the assembled foldable container 9, the rocking plate 3 can be locked using the engagement recess 17. In addition, the engagement recess 17 can be used as a handle 5, making it easy to carry the foldable container 9.

[0139] In a foldable container 9 according to a seventh aspect of the present disclosure, in the sixth aspect, the engagement recess 17 has a vertically extending protrusion 175. The engagement protrusion 37 has a claw portion 375 that hooks onto the protrusion 175.

[0140] According to this embodiment, even if there is a misalignment in the vertical positional relationship between the engaging recess 17 and the engaging protrusion 37 due to misalignment during molding or use, the claw portion 375 of the engaging protrusion 37 can be stably hooked onto the protruding portion 175 of the engaging recess 17. In other words, according to this embodiment, the engagement between the rocking plate 3 and the bottom plate 1 is stably achieved. [Explanation of symbols]

[0141] 1 Bottom plate 11 Bottom plate body 112 Outer periphery 17 Engagement recess 175 Projection part 2 Mouth Frame 25 Corner parts 255 Support leg 3 Swing Plate 31 Swing plate body 37 Engagement protrusion 375 Claw 4 Folding side panels 41 Side panel body 412 Hinge part 43 Vertical Frame 5 Handle 6 Support legs 7 Frame member with shaft 73 Rotating shaft 74 Fitting part 8 Frame members 84 Fitting part 9. Collapsible containers 9U Upper Foldable Bin 9L Lower collapsible container W1: Predetermined width

Claims

1. The bottom plate and A mouth frame located above the bottom plate; A pair of rocking plates rotatably connected to the mouth frame; A foldable container comprising the bottom plate and a pair of foldable side plates rotatably connected to the mouth frame, Each of the pair of folding side panels is A side panel body having a hinge portion so as to be foldable; and a vertical frame attached to each of the vertical edge portions on both sides of the side panel body, The vertical frame is A frame member with a shaft that is foldable by having a rotating shaft portion; A frame member arranged in connection with at least one of the upper and lower sides of the shaft-mounted frame member, Foldable container.

2. The hinge portion of the side panel body includes a long piece portion that is formed to be thinner than a surrounding portion, The long piece portion extends linearly in the left and right directions and has a predetermined width in the up and down directions, When the side plate body is viewed from the front, the rotation shaft portion of the shaft-equipped frame member and the long piece portion of the side plate body are positioned on the same straight line. The collapsible container of claim 1.

3. Each of the shaft-mounted frame member and the frame member has a fitting portion having an L-shaped cross section into which a vertical edge portion of a corresponding one of the pair of swing plates fits from the inside. The collapsible container of claim 1.

4. The mouth frame includes four corner members that form four corners of the mouth frame, Each of the four corner members has a support leg extending downwardly therefrom; When the foldable container is in an assembled state, the support legs are configured to abut against the vertical frame located below the support legs. The collapsible container of claim 1.

5. The mouth frame includes four corner members that form four corners of the mouth frame, Each of the four corner members has a support leg extending downwardly therefrom; When the foldable containers are stacked one on top of the other in a folded state, the support legs of the four corner members of the upper foldable container are configured to abut against the four corner members of the lower foldable container. The collapsible container of claim 1.

6. The rocking plate has a rocking plate body and an engaging protrusion provided on a lower part of the rocking plate body, The bottom plate has a bottom plate body and an engagement recess provided on an outer peripheral edge portion of the bottom plate body, When the foldable container is in an assembled state, the engaging protrusion is inserted into and engaged with the engaging recess from the inside, and the engaging recess constitutes a handle into which a finger can be inserted from the outside. The collapsible container of claim 1.

7. The engagement recess has a vertically extending protrusion, The engaging protrusion has a claw portion that is hooked onto the protruding portion. The collapsible container of claim 6.

Images