JP7191318B2 - container - Google Patents

Description

According to the present disclosure, a pair of second side walls and a lower end of a pair of first side walls are rotatably connected to the outer edge of a base, and after the pair of second side walls are laid down on the base, one It relates to a container in which a pair of first side walls are knocked down to be in a folded state.

Conventionally, in this type of container, a plurality of support projections projecting inward from both sides of a pair of first side walls overlap the second side wall from the outside in the assembled state to restrict the second side wall from tilting outward. It is known to do so (see, for example, Patent Literature 1).

Japanese Patent Application Laid-Open No. 2003-155032 (Figs. 1, 2, and 17)

By the way, some of the containers described above have a pair of first side walls that overlap one another in the folded state. In such containers, the overlapping height of the first side walls affects the overall height of the folded container. For this reason, in order to suppress the overlapping height of the first side walls, a plurality of protrusion receiving portions are provided on the outer surface of each first side wall, and in the folded state, a plurality of protrusion receiving portions of the lower first side wall are provided. The portion is adapted to receive a plurality of support projections of the upper first side wall. However, there is a desire to further reduce the overlapping height of the first sidewalls to further reduce the height of the folded container.

According to the first aspect of the invention, which has been made to solve the above-mentioned problems, a pair of first sidewalls facing each other and lower ends of a pair of first side walls facing each other are provided on the outer edge of a base part having a square planar shape, and a pair of first side walls facing each other in a different direction. lower ends of the pair of second side walls are rotatably connected to each other, and the pair of first side walls and the pair of second side walls are placed on the base portion from an assembled state in which the pair of first side walls and the pair of second side walls are erected; In a container in which the pair of first side walls are folded after the second side wall is knocked down and the pair of first side walls are vertically overlapped in the folded state, the pair of first side walls a plurality of support protrusions which protrude inward from both side portions of one side wall and overlap the outer surfaces of the pair of second side walls in the assembled state; a plurality of protrusion receivers for receiving the plurality of support protrusions of the upper first side wall when positioned at the position of the first side wall in the lateral direction of the first side wall; The container includes a hole-shaped protrusion receiving portion penetrating through the first side wall in the thickness direction at a position spaced inward from the end face of the container.

According to the second aspect of the present invention, the outer edge of the base portion is provided with a base-side protrusion receiving portion for receiving the support protrusion of the lower first side wall in the folded state. It is a container described in .

The invention of claim 3 is the container according to claim 1 or 2 , wherein the protrusion receiving portion of the through structure is covered by the second side wall from the inside of the first side wall in the assembled state.

In the container according to claim 1, the plurality of support projections protruding inward from both sides of the first side wall overlap the outer surfaces of the pair of second side walls in the assembled state to restrict the second side walls from tilting outward. do. Also, in the folded state, the plurality of support protrusions on the upper first side wall are received in the plurality of protrusion receiving portions on the lower first side wall. Here, in the container of the present invention, since the plurality of protrusion receiving portions include hole-shaped protrusion receiving portions penetrating the first side wall in the thickness direction, the supporting protrusions of the upper first side wall There is no restriction on the overlapping height of the first side walls due to interference between the lower side and the lower first side wall, and the overlapping height of the first side walls can be suppressed as compared with the conventional one having such a limitation. . As a result, the height of the container in the folded state can be made lower than before.

Further , the projection receiving portion of the penetrating structure may have a notch shape that is open to the lateral end face of the first side wall, but if it has a hole shape, the first side wall is more likely to be damaged than in the case of having a notch shape. As the strength increases, foreign objects are prevented from being caught.

In the container according to claim 2 , the outer edge of the base portion is provided with the base-side protrusion receiving portion for receiving the support protrusion of the lower first side wall in the folded state. Limitations on the overlapping height of the first side wall and the base portion due to interference with the base portion are reduced or eliminated, and the overlapping height of the first side wall and the base portion can be suppressed. In addition, even if the support protrusion penetrates the protrusion receiving portion and protrudes downward in the folded state, the protrusion can be received in the base side protrusion receiving portion.

In the container according to claim 3 , since the projecting receiving part of the penetrating structure is covered with the second side wall from the inside of the first side wall in the assembled state, the appearance is improved, and the contents are prevented from being protruded and the contents and foreign matters are not caught. can be prevented.

The perspective view of the assembled state of the container according to the present embodiment. Partially enlarged perspective view of the outer surface side of the first side wall Partially enlarged perspective view of the inner surface side of the first side wall Partially enlarged perspective view of the outer surface side of the second side wall Partially enlarged perspective view of the inner surface side of the second side wall Perspective view of base Partially enlarged perspective view of the top of the container Partially enlarged perspective view of the corner of the container Perspective view of a folded container Partially broken perspective view of the container in the folded state Partially broken perspective view of the container in the folded state Side view of stacked containers in a folded state Partially enlarged side view of the assembled container

Embodiments of the container 10 shown in FIGS. 1-13 are described below. As shown in FIG. 1, the container 10 of this embodiment has a rectangular parallelepiped shape with a rectangular planar shape and an open upper surface. Lower ends of the pair of second side walls 21 located on the pair of short sides are rotatably connected to the base portion 30 located on the bottom.

Hereinafter, when the first side wall 11 and the second side wall 21 are not distinguished from each other, they are simply referred to as "side walls 11 and 21". In this embodiment, the planar shape of the container 10 is rectangular and the first side wall 11 is longer than the second side wall 21, but the opposite is possible, and the planar shape of the container 10 may be square.

A connecting portion between the side walls 11 and 21 and the base portion 30 has, for example, the following structure. That is, as shown in FIGS. 2 and 4, a plurality of hinge arms 61 hang down from the lower surfaces of the side walls 11 and 21, and hinge projections 61A and 61A protrude from the lower ends of the plurality of hinge arms 61A and 61A. As shown in FIG. 6, a pair of bank portions 31 protrude from a pair of outer edge portions on the long sides of the base portion 30, and a pair of lower bank portions 32 protrude from the outer edge portions on the short side of the base portion 30. protruding from

Both bank portions 31 and 32 are formed with a plurality of hinge recesses 60 corresponding to the plurality of hinge arms 61 described above. Then, the hinge protrusion 61A of each hinge arm 61 is engaged with the inside of each hinge recess 60, and the side walls 11 and 21 stand up on the banks 31 and 32 as shown in FIG. As shown in FIG. 9, it rotates between the folded postures stacked on the base portion 30 . Further, as shown in FIG. 1, in the assembled state of the container 10 in which all the side walls 11 and 21 are upright, the pair of second side walls 21 are accommodated between the pair of first side walls 11 . Then, the pair of second side walls 21 are folded first, and the pair of first side walls 11 are folded on top of the second side walls 21 to bring the container 10 into a folded state as shown in FIG. be able to.

In the following description, when distinguishing the bank portions 31 and 32, one bank portion 31 will be referred to as the “long side bank portion 31” and the other bank portion 32 will be referred to as the “short side bank portion 32”. ”.

As shown in FIG. 6, both ends of the long-side bank portion 31 are bent at right angles toward the short-side bank portion 32 to form corner bank portions 31S. In addition, on the lower surface of the base portion 30, lower surface ribs 35L (see FIG. 11) are arranged in a grid pattern in a region inside the outer edge portion. The entire portion where the lower surface ribs 35L are formed serves as a lower surface projection 35 projecting downward from the outer edge of the base portion 30. As shown in FIG.

As shown in FIG. 1, a first flap 40 is rotatably connected to the upper edge of the first side wall 11 and is attached to the upper edge of the second side wall 21 in order to increase the strength of the assembled container 10 . is rotatably connected to the second flap 50 . Hereinafter, when the first flap 40 and the second flap 50 are not distinguished, they are simply referred to as "flaps 40, 50".

The flaps 40, 50 of this embodiment are strip-shaped extending along the upper edges of the side walls 11, 21, and have reinforcing ribs (not shown) on their inner surfaces, while their outer surfaces are flat. ing. Similarly to the connection between the base portion 30 and the side walls 11 and 21, as shown in FIG. When the hinge protrusion (not shown) of the hinge arm 61 of the hinge arm 61 is engaged, the flaps 40 and 50 are in the horizontal posture shown in the figure and the upright posture (not shown) rotated upward by 90° therefrom. ).

The pair of first flaps 40 has a length that fits between the inner surfaces of the pair of second side walls 21 when in the horizontal position, and the second flap 50 in the horizontal position is the pair of first flaps in the horizontal position. It has a length that fits exactly between 40. Further, the outer surfaces (upper surfaces) of the flaps 40 and 50 in the horizontal posture are flush with each other and positioned below the upper surfaces of the side walls 11 and 21 . Then, when the containers 10 are stacked, the lower surface protrusions 35 of the containers 10 on the upper side fit inside the side walls 11 and 21 of the containers 10 on the lower side.

As shown in FIG. 7, side wall engaging protrusions 43 protrude from both longitudinal end surfaces of the first flap 40, and corresponding flap engaging holes 29 are formed in the upper portion of the second side wall 21. . When the first flap 40 assumes a horizontal posture, the side wall engaging protrusion 43 engages with the flap engaging hole 29 to restrict the outward tilting of the second side wall 21 and to prevent the first flap 40 from moving upward. The received load is received by the second side wall 21 . Hook-shaped flap engaging protrusions 51 protrude from both longitudinal end surfaces of the second flap 50, and flap engaging holes 41 having corresponding shapes are formed at positions near the ends of the first flap 40. there is Then, when the flaps 40, 50 are in the horizontal posture, the flap engaging projections 51 and the flap engaging holes 41 are engaged with each other to couple the flaps 40, 50 together.

When the container 10 is folded, the side walls 11, 21 are folded with the flaps 40, 50 in the upright position. Then, although not shown, the pair of second side walls 21 and the pair of second flaps 50 are each folded onto the base portion 30 without overlapping each other. In this state, the outer surfaces of the second side wall 21 and the second flap 50 are substantially flush with the bottom surface of a later-described first base-side protrusion receiving portion 34 (see FIG. 6) of the base portion 30 .

On the other hand, the pair of first side walls 11 are overlapped with each other in a folded state as shown in FIG. At that time, the first flap 40 is overlapped with the base end portion of the other first side wall 11 (not shown). In this state, as shown in FIG. 12, the outer surfaces of the upper first side wall 11 and the second flap 50 are located below the upper surface 31J of the long-side embankment 31, and the height difference h1 between them is It is substantially the same as the projection amount h2 of the lower surface protrusion 35 from the lower surface of the container 10 . Then, as shown in the figure, when another container 10 is stacked on top of the folded container 10, the bottom projection 35 of the container 10 on the upper tier is pushed to the bottom of the folded container 10 on the lower tier. It fits inside the pair of long side bank portions 31 and the pair of corner bank portions 31S.

As shown in FIG. 9 , when the container 10 is folded, both lateral ends (that is, both sides) of the first side wall 11 are located above the pair of short side bank portions 32 . In order to avoid interference between the projecting portions (the first supporting projection 71, the second supporting projection 73, etc.) and the short-side bank portion 32, which will be described later in detail on both sides of the first side wall 11, the short-side bank is formed. As shown in FIG. 6, the portion 32 has a first base-side protrusion receiving portion 34, a second base-side protrusion receiving portion 33, and a third base-side protrusion receiving portion 36. formed.

The first base portion-side protrusion receiving portion 34 is formed by recessing both lateral ends of the short-side bank portion 32 in a stepped manner. The total length of each first base portion-side protrusion receiving portion 34 is, for example, 1/5 to 1/4 of the total length in the horizontal direction. Then, the above-described second base-side protrusion receiving portion 33 is formed on the center side of the entire short-side bank portion 32 from the approximate center in the horizontal direction of each of the first base-side protrusion receiving portions 34 . ing. The second base-side protrusion receiving portion 33 is formed by recessing the outer surface side of the portion below the bottom surface of the first base-side protrusion receiving portion 34 of the short-side bank portion 32 in a stepped manner. . Further, the hinge recess 60 is arranged at the center of the portion of the short-side bank portion 32 that is sandwiched between the pair of first base portion-side protrusion receiving portions 34 , and the hinge recess 60 On both sides, the third base portion-side protrusion receiving portions 36 are formed. The third base portion-side protrusion receiving portion 36 is formed by recessing the inner surface side of the short-side bank portion 32 in a stepped manner.

In order to increase the strength of connection between the side walls 11 and 21 in the assembled state, as shown in FIG. , a second support protrusion 73 and a third support protrusion 74 are provided with a space therebetween.

The first support protrusion 71 has a vertically long rectangular protrusion structure. It is flush with the lateral end surface 11T of the entire first side wall 11 . In addition, the inner surface of the first support protrusion 71 is provided with a stepped surface in the middle in the vertical direction, and the first support protrusion 71 is thicker above the stepped surface. A rectangular engagement hole 71A penetrates through the thick portion.

The side hook 72 has a hook shape that protrudes horizontally from the inner surface of the first side wall 11 and then bends downward. Also, the side hook 72 is arranged slightly inside the lateral end surface 11T of the first side wall 11 .

The second support protrusion 73 protrudes from the inner surface of the first side wall 11 and has a shape in which a pair of locking protrusions 75 protrude vertically from the tip of a vertically elongated protrusion. When viewed from the lateral direction, it has a T shape. The second support protrusion 73 is arranged slightly inside the lateral end surface 11T of the first side wall 11, like the side hook 72 described above. Further, on the surface of the second support protrusion 73 facing the center side in the horizontal direction of the first side wall 11, a concave portion 73A is formed by recessing in a stepped manner from the tip to the base end of the center portion in the vertical direction. It is

The third support projection 74 has substantially the same shape as the thick portion of the first support projection 71, and has a rectangular engagement hole 74A.

4 corresponding to the first support protrusion 71, the side hook 72, the second support protrusion 73, and the third support protrusion 74 of the first side wall 11 are provided on both sides of the second side wall 21, as shown in FIG. A first engaging protrusion 22, a hook engaging hole 23, a protrusion engaging hole 24, and a second engaging protrusion 25 are spaced apart from each other in this order from the upper side.

The first engaging protrusion 22 has a prismatic structure protruding from the outer surface of the second side wall 21 . Further, the corner portion of the first engaging projection 22 on the side opposite to the lateral end surface 21T of the second side wall 21 is obliquely cut. Furthermore, the vertical ribs 21A and the horizontal ribs 21B on the outer surface of the first engaging projection 22 are lowered around the first engaging projection 22. As shown in FIG. The second engaging projection 25 also has substantially the same shape as the first engaging projection 22, and the vertical ribs 21A and the horizontal ribs 21B on the outer surface of the first engaging projection 22 are aligned with the second engaging projection 25. is low around

The hook engaging hole 23 has an end face opening 23K on the lateral end face 21T of the second side wall 21, and the inside is wider downward than the end face opening 23K. The hook engaging hole 23 is surrounded by the vertical ribs 21A and the horizontal ribs 21B of the second side wall 21 except for the end face opening 23K, so that the hook engaging hole 23 is provided with a depth in the thickness direction of the second side wall 21. ing. An internal projecting wall 23W is provided on the inner side of the hook engaging hole 23 (on the inner surface side of the second side wall 21 in the depth direction). The inner projecting wall 23W has a vertically long plate-like shape and is connected to a surface facing the end face opening 23K in the hook engaging hole 23 and both upper and lower surfaces.

The projection engagement hole 24 has an end face opening 24K on the lateral end face 21T of the second side wall 21, and the inside is wider than the end face opening 24K. The projection engaging hole 24 is surrounded by the vertical ribs 21A and the horizontal ribs 21B of the second side wall 21 except for the end face opening 24K, so that the projection engaging hole 24 has a depth in the thickness direction of the second side wall 21. is provided. An internal projecting wall 24W is provided on the far side in the projecting engagement hole 24 . The inner projecting wall 24W has a vertically long plate shape and protrudes like a cantilever from a surface of the projecting engagement hole 24 facing the end face opening 24K. In addition, as shown in FIG. 5, the inner surfaces of both the inner projecting walls 23W and 24W are flush with the inner surface of the second side wall 21 as a whole.

The first supporting protrusion 71, the side hook 72, etc. of the first side wall 11 and the first engaging protrusion 22, the hook engaging hole 23, etc. of the second side wall 21 are engaged in the following manner. When the pair of first side walls 11 are raised from the folded state and then the second side walls 21 are raised, the second engaging protrusions 25 are engaged with the engaging holes of the third supporting protrusions 74 as shown in FIG. 74A, then the second support protrusion 73 engages with the protrusion engagement hole 24, then the side hook 72 engages with the hook engagement hole 23, and finally the first engagement protrusion. The portion 22 engages with the engagement hole 71A of the first support protrusion 71 . Further, as shown in FIG. 7, the inner projecting wall 24W of the projection engagement hole 24 is fitted into the recess 73A of the second support projection 73. As shown in FIG.

In addition, since the second support protrusion 73 and the side hook 72 are positioned closer to the center side in the horizontal direction of the first side wall 11 than the end face 11T of the first side wall 11, the second support protrusion 73 and the side hook 72 are positioned closer to the end face 11T than the end face 11T. When the second side wall 21 approaches the upright posture, the hook engaging hole 23 and the projection engaging hole 24 are engaged at an early stage, and the outward opening deformation of the pair of first side walls 11 is suppressed.

When the second side wall 21 assumes the upright posture, the first to third support protrusions 71, 73, and 74 restrict the first side wall 11 from falling outward from the upright posture. The three supporting protrusions 71 , 73 , 74 and the side hooks 72 suppress outward opening deformation of the pair of first side walls 11 .

In addition, as shown in FIG. 3, flexible pieces 15 are provided on the upper portions of the first side walls 11 near both ends in the horizontal direction. The flexible piece 15 is formed by cutting a part of the first side wall 11 into a cantilever shape extending vertically by a slit 11S. 1 protrudes from the inner surface of the side wall 11 . Then, the second side wall 21 passes through the upright engaging protrusion 16 in the process of raising the second side wall 21, and when the second side wall 21 assumes the upright position, the upright engaging protrusion 16 is formed on the inner surface of the second side wall 21. are engaged to hold the second side wall 21 in an upright position.

Now, when the container 10 is folded, the first side walls 11 overlap each other vertically as described above. At that time, the side hooks 72 of the first side wall 11 on the upper side are accommodated in spaces between the vertical ribs 11A of the first side wall 11 on the lower side. Also, the third support protrusion 74 is positioned in a range where the first side walls 11 do not overlap each other. In order to prevent interference between the first side walls 11, the first support protrusion 71, the second support protrusion 73, and the upright engagement protrusion 16 are provided with a second support as shown in FIG. A first protrusion receiving portion 77 , a second protrusion receiving portion 76 and a notch portion 78 are formed in one side wall 11 .

Specifically, the first protrusion receiving portion 77 is arranged near the lower end of the first side wall 11 and has a rectangular shape elongated in the vertical direction, one long side of which is open to the end face 11T of the first side wall 11 . ing. A third supporting protrusion 74 is arranged below and adjacent to the first protrusion receiving section 77 .

As shown in FIG. 3, the second protrusion receiving portion 76 is arranged at a position near the upper end of the first side wall 11 and at a position spaced inward from the lateral end surface 11T of the first side wall 11, It has a hole shape that penetrates the side wall 11 in the thickness direction. Further, the second protrusion receiving portion 76 extends in the vertical direction in a strip shape, and the side hook 72 is arranged at the upper end portion thereof.

As shown in FIG. 2, the notch portion 78 is arranged laterally adjacent to the first projection receiving portion 77 and is formed by notching a portion of the longitudinal rib 11A in, for example, a trapezoidal shape.

Then, when the container 10 is folded, as shown in FIG. 11, the second support protrusion 73 of the upper first side wall 11 penetrates the second protrusion receiving portion 76 of the lower first side wall 11. , the first support protrusion 71 of the upper first side wall 11 (not shown) receives the first protrusion of the lower first side wall 11 . It penetrates the portion 77 and protrudes slightly downward from the lower second support protrusion 73 . Furthermore, although not shown, the upright engaging protrusion 16 of the upper first side wall 11 is received in the notch 78 of the lower first side wall 11 .

Further, when the container 10 is folded, both side portions of the first side wall 11 are positioned above the short-side bank portions 32 as described above. Then, as shown in FIGS. 10 and 11, the second support projection 73 and the side hook 72 of the lower first side wall 11 are attached to the third base-side projection receiving portion 36 of the short-side bank portion 32 . and are accepted. A portion of the second support protrusion 73 of the upper first side wall 11 that protrudes downward through the second protrusion receiving portion 76 of the lower first side wall 11 also serves as a third base side protrusion. It is received in the part receiving portion 36 (see FIG. 11).

Further, as shown in FIG. 9, the first and third support protrusions 71 and 74 of the lower first side wall 11 are accommodated in the first base-side protrusion receiving section 34 of the short-side bank section 32 . is received, and the tip of the first support protrusion 71 is received in the second base portion side protrusion receiving portion 33 . In addition, the portion of the first support protrusion 71 of the upper first side wall 11 that protrudes downward through the first protrusion receiving portion 77 of the lower first side wall 11 is also the first base portion side protrusion. It is received in the part receiving portion 34 (see FIG. 12).

As described above, in the container 10 of this embodiment, the first and second protrusion receiving portions 76 and 77 form a penetrating structure that penetrates the first side wall 11 in the thickness direction, and in the folded state, the upper first The first and second support projections 71, 73 of the side wall 11 pass through the first and second projection receiving portions 76, 77 of the lower first side wall 11. As shown in FIG. As a result, the overlapping height of the first sidewalls 11 is not limited by interference between the first and second support projections 71 and 73 of the upper first sidewall 11 and the lower first sidewall 11. The overlapping height of the first side walls 11 can be suppressed as compared with the conventional one, which had a severe limitation.

Further, the first to third base-side protrusion receiving portions 33, 34, and 36 of the base portion 30 are folded, so that the first to third support protrusions 71, 71, 71 of the lower first side wall 11 are supported. 73, 74, and the first and second base side protrusion receiving portions 34, 36 penetrate through the first and second protrusion receiving portions 76, 77 of the penetrating structure. Since the lower ends of the support protrusions 71 and 73 are received, the overlapping height of the first side wall 11 and the base section 30 is not restricted due to interference between the support protrusions and the base section 30. The overlap height of 30 can also be reduced. As a result, the height of the entire container 10 in the folded state can be suppressed, and the stacking height of the containers 10 can be suppressed.

Further, the second protrusion receiving portion 76 has a notch shape that opens to the lateral end face 11T of the first side wall 11, whereas the first protrusion receiving portion 77 has a hole shape. , the strength of the side portion of the first side wall 11 is increased as compared with the case where the notch shape is used, and foreign matter is prevented from being caught. As shown in FIG. 3, the first and second protrusion receiving portions 76 and 77 are covered with the second side wall 21 from the inside of the first side wall 11 in the assembled state, so that the appearance is improved and the stored object can be It is possible to prevent jumping out and catching of stored items and foreign objects.

In the above embodiment, the first to third support protrusions 71, 73, 74 correspond to the "support protrusions" in the claims, and the first and second protrusion receiving portions 76, 77 corresponds to the "projection receiving portion" in the claims, and the first to third base-side projection receiving portions 33, 34, and 36 correspond to the "base-side protrusion receiving portions" in the claims. Equivalent to

[Other embodiments]
(1) In the container 10 of the above embodiment, in the folded state, the first and second support projections 71 and 73 penetrate the first and second projection receiving portions 76 and 77 and protrude downward therefrom. However, even if one or both of the first and second support projections 71 and 73 do not penetrate the first and second projection receiving portions 76 and 77 to the position where they protrude downward in the folded state. good.

(2) In the container 10 of the above embodiment, both the first and second protrusion receiving portions 76, 77 penetrate the first side wall 11, but some of the plurality of protrusion receiving portions Only the protrusion receiving portion may be configured to penetrate the side wall.

(3) Although the container 10 of the above embodiment was provided with the flaps 40 and 50, the flaps may not be provided.

REFERENCE SIGNS LIST 10 container 11 first side wall 11T, 21T end surface 21 second side wall 30 base portion 33, 34, 36 first to third base portion side protrusion receiving portions (base portion side protrusion receiving portions)
71 first support protrusion (support protrusion)
73 second support protrusion (support protrusion)
74 third support protrusion (support protrusion)
76 second projection receiving portion (projection receiving portion)
77 first projection receiving portion (projection receiving portion)

Claims (3)

Lower ends of a pair of first side walls facing each other and lower ends of a pair of second side walls facing each other in a different direction are rotatable around the outer edge of a base portion having a square planar shape. From the assembled state in which the pair of first side walls and the pair of second side walls are connected and erected, the pair of second side walls are laid down on the base portion, and then the pair of first side walls are A container in which the pair of first side walls are vertically overlapped in the folded state,
a plurality of supporting protrusions protruding inward from both side portions of the pair of first side walls and overlapping outer surfaces of the pair of second side walls in the assembled state;
a plurality of projection receiving portions formed on the pair of first side walls and receiving the plurality of supporting projections of the upper first side wall when positioned on the lower side in the folded state; ,
The plurality of protrusion receiving portions include hole-shaped protrusion receiving portions penetrating through the first side wall in the thickness direction at positions spaced inward from the lateral end faces of the first side walls. . 2. The container according to claim 1, wherein the outer edge of the base portion is provided with a base-side protrusion receiving portion for receiving the support protrusion of the lower first side wall in the folded state. 3. The container according to claim 1 or 2, wherein the protrusion receiving portion of the penetrating structure is covered by the second side wall from the inside of the first side wall in the assembled state.

Images