CN114803188B - Container and method for manufacturing container - Google Patents

Abstract

The present invention provides a container capable of realizing high conveying efficiency by loading and storing a large amount of objects to be conveyed. The container (1) of the present invention is configured to have at least a bottom surface portion (3) having a substantially rectangular shape in plan view and a pair of opposing side surface portions (5, 6) having a substantially rectangular shape in plan view and erected from the peripheral edge of the bottom surface portion, one or both of the side surfaces adjacent to the side surface portions has an opening (8), one of the side surface portions has one or more stepped portions (51) formed at a predetermined interval in the height direction, the other one also has one or more stepped portions (61) formed in a symmetrical manner, the stepped portions (51, 61) are formed by forming recesses (52, 62) protruding from the outer surface side of the side surface portion in opposite directions and extending in directions orthogonal to the opposite directions, and a shelf (9) on which a conveyed object is placed is slidably disposed on the opposing stepped portions in a direction parallel to the opening direction.

Description

Container and method for manufacturing container

Technical Field

The present invention relates to a container and a method for manufacturing the container.

More specifically, the present invention relates to a container capable of achieving high transport efficiency by loading and storing a large amount of transported objects and a method for manufacturing the container.

Background technique

Conventionally, as a method for transporting objects, there is a method of transporting using a box-shaped container.

In the transportation by such containers, when transporting containerized beverages such as bottled beverages and canned beverages, the containerized beverages are placed on pallets in a state of being stored in boxes and transported.

However, in such a transportation method, if the containers are stacked up and down in the container, the containers in the box may be deformed or damaged. Therefore, they are transported flat in the truck bed instead of stacked up and down, which causes problems such as large-scale transportation and waste of space during transportation.

Therefore, there arises a problem that high transport efficiency cannot be obtained and the transport cost is high.

Therefore, Patent Document 1 discloses an example of a method for conveying a large amount of conveyed objects.

Japanese Patent Application Laid-Open No. 2001-55292 (Patent Document 1) proposes a container with a pull-out rack, in which the pull-out property and the pull-out prevention property of the shelf plate are excellent, and the number of components can be reduced and the structure can be simplified.

The container with a pull-out rack comprises: a container body, wherein a storage space is formed between two opposite side panels of the container body;

a pull-out shelf, both side ends of which are slidably mounted relative to the two side plates; and

A stop member is rotatably mounted on at least any one of the two side plates, and when the pull-out shelf is located in the storage space, the stop member engages with a front opening or a rear opening of a side end frame mounted on a side end portion of the pull-out shelf, and when the pull-out shelf is being pulled out of the storage space, the stop member slides on an upper surface of the side end frame, and when the pull-out shelf is pulled out of the storage space to a predetermined position, the stop member enters an engagement hole formed on an upper surface of the side end frame by its own weight, thereby limiting the pull-out movement of the pull-out shelf.

Prior art literature

Patent Literature

Patent Document 1: Japanese Patent Application Publication No. 2001-55292 (claims, FIG. 1 )

Summary of the invention

Problem that the invention aims to solve

In the container with a pull-out rack described in Patent Document 1, the pull-out rack is held on guide rollers mounted in the groove-shaped portion via side end frames mounted on both sides thereof, and is slidable along the longitudinal direction of the guide rail.

Therefore, the pull-out shelf may be damaged, particularly in a large container when a considerable amount of objects to be transported are loaded thereon.

In view of the above-mentioned current situation, the present invention intends to provide a container and a method for manufacturing the container that can achieve high transportation efficiency by loading and storing a large amount of transported objects.

Solutions for solving problems

The invention described in claim 1 is a container, which has at least a bottom portion that is substantially rectangular in plan view and a pair of side portions that are substantially rectangular in plan view and are arranged upright from the periphery of the bottom portion, and one or both of the side portions adjacent to the side portions have openings.

The container is characterized by:

One or more step portions are formed at predetermined intervals in the height direction on one of the pair of opposite side portions, and one or more step portions are formed symmetrically with the one or more step portions on the other side portion.

The step portions are each formed by forming a recessed portion that protrudes from the outer surface side of the side portion toward the opposing direction and extends in a direction orthogonal to the opposing direction.

The shelf plate, which is mounted on the opposed step portions and on which the conveyed object is placed, is slidably arranged in a direction parallel to the opening direction.

According to the container described in technical solution 1,

The invention described in claim 2 of the present invention is characterized in that:

The step portion is constructed to be roughly polygonal in shape when viewed from the opening direction, and comprises: an upper wall portion, which is flat and extends in a horizontally protruding manner from the end edge of the side portion toward a relative direction; and a bottom wall portion, which connects the end of the side portion and the end of the upper wall portion or connects the end of the side portion and the end of one or more side wall portions extending downward from the end edge of the upper wall portion, and is inclined downward from the upper wall portion or the side wall portion toward the side portion.

According to the container described in technical solution 1,

The invention described in claim 3 of the present invention is characterized in that:

The step portion is constructed to be roughly trapezoidal in shape when viewed from the opening direction, and comprises: an upper wall portion, which is flat and extends from the end edge of the side portion in a horizontally protruding manner toward the relative direction; a side wall portion, which hangs down from the end edge of the upper wall portion; a bottom wall portion, which connects the end of the side wall portion and the end of the side portion, and is inclined downward from the side wall portion toward the side portion; and a pair of end wall portions, which are arranged at both ends in a direction parallel to the opening direction.

A container according to any one of technical solutions 1 to 3,

The invention described in claim 4 of the present invention is characterized in that:

The side surfaces are all made of steel plates having a tensile strength of 400 MPa or more.

A container according to any one of technical solutions 1 to 4,

The invention described in claim 5 of the present invention is characterized in that:

The side surfaces are each configured to have a thickness exceeding 2.0 mm.

A container according to any one of technical solutions 1 to 5,

The invention described in claim 6 of the present invention is characterized in that:

A reinforcing member is installed between one end and the other end of the recessed portion.

A container according to any one of technical solutions 1 to 5,

The invention described in claim 7 of the present invention is characterized in that:

The container has a top surface portion, which is arranged opposite to the bottom surface portion and has a substantially rectangular shape when viewed from above.

A reinforcing member composed of a member extending in the height direction and formed in a long strip shape is combined with the step portion in a state of penetrating all the step portions formed at predetermined intervals in the height direction. The reinforcing member is combined with the upper end of the side portion or the top surface portion at its upper end portion, and is combined with the lower end of the side portion or the bottom surface portion at its lower end portion.

The invention described in claim 8 of the present invention is a method for manufacturing a container, which is a method for manufacturing a container, that is, the container has at least a bottom portion that is substantially rectangular in a plan view and a pair of side portions that are substantially rectangular in a plan view and are arranged upright from the periphery of the bottom portion, and one or both of the side portions adjacent to the side portions have an opening.

The method for manufacturing the container is characterized in that:

One or more step portions are formed at predetermined intervals in the height direction on one of the pair of opposite side portions, and one or more step portions are formed symmetrically with the one or more step portions on the other side portion.

The step portions are each formed by forming a recessed portion that protrudes from the outer surface side of the side surface portion toward the opposing direction and extends in a direction orthogonal to the opposing direction.

Effects of the Invention

The container of the present invention is constructed as follows, comprising at least a bottom portion which is roughly rectangular in shape when viewed from above and a pair of opposite side portions which are roughly rectangular in shape when viewed from above and are arranged upright from the periphery of the bottom portion, one or both of the side portions adjacent to the side portions having an opening, one of the side portions in the pair of opposite side portions having one or more step portions formed at predetermined intervals in the height direction, and one or more step portions also being formed on the other side portion in a manner symmetrical to the one or more step portions, the step portions being formed by forming such recesses, that is, the recesses protrude from the outer surface side of the side portions toward the relative direction and extend in a direction orthogonal to the relative direction, and a shelf plate which is erected on the relative step portions and is used to carry the transported objects is arranged to slide freely in a direction parallel to the opening direction.

Therefore, in this container, since the step portion is formed integrally with the side portion, the container is very strong and can support a relatively heavy shelf on which objects to be transported are placed.

Furthermore, according to this container, since the shelves are arranged at predetermined intervals in the height direction, a large amount of objects to be transported can be loaded.

Furthermore, since the shelf plate is slidable in a direction parallel to the opening direction, the objects to be conveyed can be easily taken out and put in.

In the container, the step portion can be configured to be a roughly polygonal shape when viewed from the opening direction, and can be configured to have: an upper wall portion, which is flat and extends in a horizontally protruding manner from the end edge of the side portion toward a relative direction; and a bottom wall portion, which connects the end of the side portion and the end of the upper wall portion or connects the end of the side portion and the end of one or more side wall portions extending downward from the end edge of the upper wall portion, and is inclined downward from the upper wall portion or the side wall portion toward the side portion.

According to such a configuration, even in a state where the conveyed object is placed on the shelf, the load applied to the step portion can be dispersed and reduced.

At this time, in the container, the step portion can be configured to be roughly trapezoidal in shape when viewed from the opening direction, and can be configured to have: an upper wall portion, which is flat and extends from the end edge of the side portion in a horizontally protruding manner toward the relative direction; a side wall portion, which hangs down from the end edge of the upper wall portion; a bottom wall portion, which connects the end of the side wall portion and the end of the side portion, and is inclined downward from the side wall portion toward the side portion; and a pair of end wall portions, which are arranged at both ends in a direction parallel to the opening direction.

Furthermore, in the container, the side surfaces can be made of steel plates having a tensile strength of 400 MPa or more, and can have a thickness exceeding 2.0 mm.

According to such a configuration, the step portion formed on the side surface portion can more reliably support the relatively heavy shelf on which the object to be conveyed is placed.

Furthermore, in the container, a reinforcing member can be installed between one end and the other end of the recessed portion.

According to such a structure, the step portion can be fixed between one end and the other end of the recess (or between the upper end and the lower end of the step portion) and the strength of the step portion can be strengthened. Therefore, even if the weight of the shelf carrying the conveyed object is high, the step portion can be used to more reliably support the shelf.

In addition, in a case where the container has a top portion which is arranged opposite to the bottom portion and has a generally rectangular shape when viewed from above, the reinforcing member can be constructed such that the reinforcing member is formed by a member extending in the height direction and formed in a long strip shape, and the reinforcing member is connected to the step portion in a state of penetrating all the step portions formed at predetermined intervals in the height direction, and the reinforcing member is connected at its upper end to the upper end of the side portion or the top portion, and at its lower end to the lower end of the side portion or the bottom portion.

According to such a configuration, the strength of the step portion can be further increased. Therefore, even when the weight of the shelf on which the object to be conveyed is placed is high, the shelf can be more reliably supported by the step portion.

The manufacturing method of a container of the present invention is used to manufacture such a container, that is, the container has at least a bottom portion that is roughly rectangular in shape when viewed from above and a pair of opposite side portions that are erected from the periphery of the bottom portion and are roughly rectangular in shape when viewed from above, and one or both of the side portions adjacent to the side portions have an opening. In this manufacturing method, one of the side portions of the pair of opposite side portions is formed with one or more step portions at a predetermined interval in the height direction, and when the other side portion is also formed with one or more step portions in a manner symmetrical to the one or more step portions, the step portions are formed by forming such a recess, that is, the recess protrudes from the outer surface side of the side portion toward the relative direction and extends in a direction orthogonal to the relative direction.

Therefore, according to the manufacturing method, the step portion is formed integrally with the side surface portion and is therefore very strong.

Furthermore, by slidably arranging the shelf on each pair of opposite step portions, a large number of conveyed objects can be loaded on the shelf. The shelf can slide freely in a direction parallel to the opening direction, so it is very easy to take out and put in the conveyed objects.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing an example of an implementation of a container according to the present invention.

Fig. 2 is a cross-sectional view taken along the line AA' of Fig. 1 .

FIG. 3 is a schematic explanatory diagram showing a step portion formed on a side surface portion constituting the container of FIG. 1 .

FIG. 4 is a schematic explanatory diagram showing another embodiment of the container of the present invention.

Fig. 5 is a cross-sectional view taken along the line BB' in Fig. 4 .

FIG. 6 is a schematic explanatory diagram showing another embodiment of the container of the present invention.

Description of Reference Numerals

1. Container; 2. Container body; 3. Bottom portion; 31. Insertion hole; 4. Top portion; 5. Side portion (front end side); 51. Step portion; 51a. Upper wall portion; 51b. Side wall portion (upper bottom portion); 51c. Bottom wall portion; 51d. End wall portion; 52. Recess; 52a. One end portion of the recess; 52b. The other end portion of the recess; 6. Side portion (rear end side); 61. Step portion; 61a. Upper wall portion; 61b. Side wall portion (upper bottom portion); 61c. Bottom wall portion; 61d. Side wall portion; 62. Recess; 7. Side portion (left side); 8. Opening; 9. Shelf; 91. Engaging portion; 92. Insertion hole; 10. Reinforcement member; 10a. Upper end portion of the reinforcement member; 10b. Lower end portion of the reinforcement member; S. Protruding length.

Detailed ways

An example of implementation of the container of the present invention will be described in detail below based on the drawings.

In addition, the present invention is not limited to the disclosed embodiments, and various modifications can be made without changing the gist of the present invention.

In the present invention, as clearly shown in FIG. 1 , a container 1 is composed of a container body 2 having a rectangular parallelepiped shape.

Furthermore, in this embodiment, the container body 2 is configured to have a total length of 40 feet (approximately 12 meters) in the front-rear direction.

In Figure 1, the container body 2 is formed into an elongated box shape with an opening 8 on the right side surface as a result of a bottom portion 3 having a generally rectangular shape when viewed from above, a top portion 4 having a generally rectangular shape when viewed from above and arranged opposite to the bottom portion 3, a pair of generally rectangular side portions 5 and 6 having a generally rectangular shape when viewed from above and opposing each other in the front-to-rear direction of the bottom portion 3 and arranged in an upright state, and a generally rectangular side portion 7 having a generally rectangular shape when viewed from above and arranged in an upright state on the left side of the bottom portion 3.

In addition, in this embodiment, the side surface on the right side is set as an opening portion, but one or both of the side surfaces adjacent to a pair of side surfaces that are opposite to each other in the front-to-back direction or the left-to-right direction of the bottom surface portion 3 and set in an upright shape can be set as an opening portion, or an opening portion can be provided.

1 (and FIG. 2, FIG. 4, FIG. 5), in order to facilitate the transport of the container 1, a pair of insertion holes 31, 31 are formed at the right end portion of the bottom portion 3 (the end portion on the side of the opening portion 8) to allow for the insertion of a forklift claw, etc.

The opening 8 is configured to be closable by a door or the like.

In this embodiment, a door (not shown) that opens left and right is attached to the opening 8 so as to be openable and closable.

In FIG. 1 , the container body 2 has a top surface 4 , but the container body 2 may be configured to have at least a bottom surface and a pair of side surfaces facing each other and standing in the front-rear direction or the left-right direction.

Therefore, the top surface portion is not necessarily provided.

In FIGS. 1 and 2 , a plurality of step portions 51 are formed on the facing surface (inner surface) of one side portion 5 of the pair of side portions 5 and 6 at predetermined intervals in the height (up-down) direction.

In addition, a plurality of step portions 61 are also formed on the opposing surface (inner surface) of the other side surface portion 6 so as to be symmetrical with the plurality of step portions 51 .

Therefore, the rack plate 9 for placing the conveyed object can be arranged by utilizing the pair of facing step portions 51 and 61 .

Furthermore, in this embodiment, four step portions 51 and 61 are formed on the opposing surfaces of the pair of side portions 5 and 6 , respectively. However, one or more step portions may be formed on each opposing surface as required.

As shown in Figures 1 to 3, the step portions 51 and 61 are formed by forming recesses 52 and 62, which protrude from the outer surface side of the side portions 5 and 6 toward the inside (relative direction) and extend in a direction orthogonal to the relative direction (left and right direction in Figures 1 to 3).

Therefore, the step portions 51 and 61 are formed integrally with the side portions 5 and 6 and are therefore very stable, and as described later, can support a relatively heavy shelf on which objects to be conveyed are placed.

The protruding length of the step portions 51 and 61 is not particularly limited as long as the step portions 51 and 61 are long enough to support the shelf plate.

The protruding length may be, for example, 100 mm or more, preferably 120 mm or more, and more preferably about 120 to 200 mm.

Furthermore, in this embodiment, the protruding length S of the step portions 51 and 61 is set to be approximately 124 mm.

Regarding the shape of the step portion 51 (or 61), there is no particular limitation as long as it is a shape that, when viewed from the opening direction of the container body 2, has a flat surface (a surface abutting the shelf described later) extending vertically from the side portion 5 (or 6) as the upper surface, and is preferably a shape that has: an upper wall portion having a flat surface extending vertically from the side portion 5 (or 6); and a bottom wall portion that connects the end of the side portion and the end of the upper wall portion or connects the end of the side portion and the end of one or more side wall portions extending downward from the end edge of the upper wall portion, and is inclined downward from the side wall portion toward the side portion 5 (or 6).

According to such a configuration, the load on the shelf or the shelf on which the conveyed object is placed, which is applied by the step portions 51 and 61 , can be dispersed and reduced.

More preferably, the step portion 51 (or 61) is configured to have a roughly triangular shape or a roughly polygonal shape (especially a roughly trapezoidal shape) when viewed from the opening direction of the container body 2, the roughly triangular shape having: an upper wall portion having a flat surface extending vertically from the side portion 5 (or 6); and a bottom wall portion connecting the end of the upper wall portion and the end of the side portion 5 (or 6) and sloping downward from the side wall portion toward the side portion 5 (or 6), the roughly polygonal shape (especially a roughly trapezoidal shape) having: an upper wall portion having a flat surface extending vertically from the side portion 5 (or 6); one or more side wall portions extending downward from the end edge (inner end edge) of the upper wall portion; and a bottom wall portion connecting the end of the side wall portion and the end of the side portion and sloping downward from the side wall portion toward the side portion 5 (or 6).

In this embodiment, the step portions 51, 61 are configured as shown in FIGS. 1 to 3, and are substantially trapezoidal in shape when viewed from the left and right directions (opening directions), and have: an upper wall portion 51a, 61a, which is flat and extends inwardly from the end edge (lower end edge) of the side portion 5, 6 in a horizontally protruding manner; and a side wall portion (upper bottom portion) 51b, 61b, which extends from the upper wall portion 51a, 61a. The end edges (inner edges) of the parts 51a and 61a hang down; bottom wall parts 51c and 61c, which connect the ends of the side wall parts 51b and 61b and the ends of the side parts 5 and 6, and are inclined downward from the side wall parts toward the side parts 5 and 6; and a pair of end wall parts 51d and 61d, which are arranged at both ends in the left-right direction (a direction parallel to the opening direction).

1 and 2, the step portions 51, 61 are continuously formed along the left-right direction (direction parallel to the opening direction), and may be formed continuously or discontinuously (intermittently) as long as they can support the shelf.

In this embodiment, in order to fix and strengthen the strength of the step portions 51, 61 between one end 52a and the other end 52b of the recess 52 and between one end and the other end of the recess 62 (or between the upper end and the lower end of the step portions 51, 61), a reinforcing member 10 can be installed between one end 52a and the other end 52b of the recess 52 and between one end and the other end of the recess 62.

According to such a configuration, even when the weight of the shelf on which the conveyed object is placed is high, the shelf can be supported by the step portions 51 and 61 .

In addition, the reinforcing member 10 can also be constructed as shown in Figures 4 and 5, in which the reinforcing member 10 is composed of a columnar member extending in the height direction and formed into a long strip. The reinforcing member 10 is combined with the step portion 51 (or 61) in a state of penetrating all the step portions 51 (or 61) formed at predetermined intervals in the height direction, the upper end portion 10a is combined with the upper end portion of the side portion 5 (or 6) or the top surface portion 4, and the lower end portion 10b is combined with the lower end portion of the side portion 5 (or 6) or the bottom surface portion 3.

According to such a configuration, even when the weight of the shelf on which the conveyed object is placed is high, the shelf can be more reliably supported by the step portions 51 and 61 .

At this time, in this embodiment, three reinforcing members 10 are provided at predetermined intervals in a direction parallel to the opening direction of the container body 2 (left and right directions in Figures 4 and 5), but regarding the reinforcing members 10, one or more may be provided at predetermined intervals in a direction parallel to the opening direction of the container body 2.

In the present invention, the side surfaces 5 and 6 on which the step portions 51 and 61 are formed may be configured to support a shelf (especially a shelf of relatively high weight) on which an object to be conveyed is placed.

The strength of the side surfaces 5 and 6 is not particularly limited as long as the side surfaces 5 and 6 can support the rack on which the objects to be conveyed are placed. Preferably, both of the side surfaces 5 and 6 are made of a steel plate having a tensile strength of 400 MPa or more.

Furthermore, in this embodiment, the side surfaces 5 and 6 are both made of steel plates having a tensile strength of about 480 MPa.

There is no particular limitation on the thickness of the side portions 5 and 6 as long as the shelf on which the conveyed objects are placed can be supported. Preferably, the side portions 5 and 6 are both configured to have a thickness exceeding 2.0 mm.

Furthermore, in this embodiment, the side surfaces 5 and 6 are both made of steel plates having a thickness of about 2.3 mm.

In the present invention, the shelf plate 9 which is mounted on the pair of step portions 51 and 61 and on which the conveyed object is placed is slidably disposed in a direction parallel to the opening direction.

In Figures 1 and 2, the shelf 9 is composed of a plate-like body having a width equivalent to the width between the opposing surfaces of the pair of step portions 51, 61 and a required thickness, and having a roughly rectangular shape when viewed from above. At both ends of the shelf 9 in the longitudinal direction (the direction perpendicular to the opening direction), an engaging portion 91 for engaging with the step portions 51, 61 is formed by cutting out a required depth from the bottom and extends along the left-right direction (the direction parallel to the opening direction).

On the other hand, as shown in FIGS. 1 and 2 , the step portions 51 , 61 extend in a direction parallel to the opening direction.

Therefore, the shelf plate 9 is slidable in a direction parallel to the opening direction, so that the objects to be conveyed can be taken out and put in very easily.

In addition, regarding the shelf 9, as shown in Figure 6, the step portions 51, 61 are engaged with the two end portions of the shelf 9 in the length direction (the direction orthogonal to the opening direction), and therefore, it can also be constructed as a locking portion 93 that protrudes or extends in the length direction and extends along the left and right direction (the direction parallel to the opening direction).

In FIGS. 1 , 2 , 4 and 5 , a pair of insertion holes 92 , 92 are formed at the right end portion of the shelf plate 9 (the end portion on the opening 8 side) so that claws of a forklift or the like can be inserted.

Therefore, the shelf plate 9 can be easily taken out, inserted, and transported using the pair of insertion holes 92 , 92 .

In the container 1 having such a structure, a pair of step portions 51 , 61 are firmly formed on the opposing surfaces of the pair of side portions 5 , 6 , and the shelf 9 mounted and laid on the pair of opposing step portions 51 , 61 slides on the step portions 51 , 61 .

Therefore, when taking out the conveyed object placed on the shelf plate 9, the shelf plate 9 is slid toward the opening side, so that the conveyed object can be easily taken out.

Furthermore, the container of the present invention can be mounted on a vehicle, and in this case, the container can be mounted so that the opening is located on the left, right, or rear side.

In addition, the container of the present invention can be used to transport all goods, and is particularly suitable for transporting beverages in containers such as bottled beverages and canned beverages.

The manufacturing method of a container of the present invention is a manufacturing method of a container, that is, the container has at least a bottom portion in a substantially rectangular shape in a plan view and a pair of side portions in a substantially rectangular shape in a plan view and arranged upright from the periphery of the bottom portion, and one or both of the side portions adjacent to the side portions have an opening, and the manufacturing method of the container is characterized in that:

One or more step portions are formed at predetermined intervals in the height direction on one of the pair of opposite side portions, and one or more step portions are formed symmetrically with the one or more step portions on the other side portion.

The step portions are each formed by forming a recessed portion that protrudes from the outer surface side of the side surface portion toward the opposing direction and extends in a direction orthogonal to the opposing direction.

This manufacturing method can be easily implemented by referring to the description about the above-mentioned container.

Industrial Applicability

The container of the present invention is constructed as follows: when one or more step portions are formed at predetermined intervals in the height direction on a pair of opposite side portions constituting the container, the step portions are formed by forming recessed portions protruding from the outer surface side of the side portion toward the relative direction and extending in a direction orthogonal to the relative direction, and the shelf is slidably arranged on the pair of opposite step portions.

Therefore, the container of the present invention can load a large amount of conveyed objects on shelves arranged at predetermined intervals in the height direction, and by sliding the shelves in a direction parallel to the opening direction, the conveyed objects can be easily taken out and put in. The present invention can be applied to all containers.

Claims (8)

1. A container for a container to be stored,

At least a bottom surface portion having a substantially rectangular shape in a plan view and a pair of opposing side surface portions having a substantially rectangular shape in a plan view and provided upright from a peripheral edge of the bottom surface portion, one or both of the side surfaces adjacent to the side surface portions having an opening portion,

The container is characterized in that,

One or more stepped portions are formed at a predetermined interval in the height direction on one of the pair of opposed side face portions, and one or more stepped portions are also formed symmetrically to the one or more stepped portions on the other side face portion,

The step portions are each formed by forming a recess that protrudes from the outer surface side of the side surface portion toward the opposite direction, extends in a direction orthogonal to the opposite direction, and has, when seen from the opening direction: an upper wall portion which is flat and extends so as to horizontally protrude from an end edge of the side surface portion in the opposite direction; and a bottom wall portion connecting an end of the side wall portion and an end of the upper wall portion or connecting an end of the side wall portion and an end of one or more side wall portions extending downward from an end edge of the upper wall portion, and inclined downward from the upper wall portion or the side wall portion toward the side wall portion,

The shelf plates are arranged on the opposite step parts in a slidable manner in a direction parallel to the opening direction.

2. The container of claim 1, wherein the container is configured to hold the container,

The step portion is configured to have a substantially polygonal shape when viewed from the opening direction, and has: an upper wall portion which is flat and extends so as to horizontally protrude from an end edge of the side surface portion in the opposite direction; and a bottom wall portion connecting an end of the side wall portion and an end of the upper wall portion or connecting an end of the side wall portion and an end of one or more side wall portions extending downward from an end edge of the upper wall portion, and being inclined downward from the upper wall portion or the side wall portion toward the side wall portion.

3. The container of claim 1, wherein the container is configured to hold the container,

The step portion is configured to have a substantially trapezoidal shape when viewed from the opening direction, and has: an upper wall portion which is flat and extends so as to horizontally protrude from an end edge of the side surface portion in the opposite direction; a side wall portion depending from an end edge of the upper wall portion; a bottom wall portion connecting an end of the side wall portion and an end of the side wall portion, and inclined downward from the side wall portion toward the side wall portion; and a pair of end wall portions provided at both ends in a direction parallel to the opening direction.

4. A container according to any one of claims 1 to 3, wherein,

The side portions are each made of a steel sheet having a tensile strength of 400MPa or more.

5. A container according to any one of claims 1 to 3, wherein,

The side portions are each formed to have a thickness exceeding 2.0mm.

6. A container according to any one of claims 1 to 3, wherein,

A reinforcing member is mounted between one end portion and the other end portion of the recess.

7. A container according to any one of claims 1 to 3, wherein,

The container has a top surface portion which is provided so as to face the bottom surface portion and has a substantially rectangular shape in plan view,

A reinforcing member formed of a member extending in the height direction and formed in an elongated shape is coupled to the step portion in a state of penetrating all the step portions formed at predetermined intervals in the height direction, and is coupled to the upper end portion of the side surface portion or the top surface portion by its upper end portion and to the lower end portion of the side surface portion or the bottom surface portion by its lower end portion.

8. A method for manufacturing a container having at least a bottom surface portion having a substantially rectangular shape in plan view and a pair of opposing side surface portions having a substantially rectangular shape in plan view and provided upright from the peripheral edge of the bottom surface portion, one or both of the side surfaces adjacent to the side surface portions having an opening,

The method of manufacturing the container is characterized in that,

One or more stepped portions are formed at a predetermined interval in the height direction on one of the pair of opposed side face portions, and when one or more stepped portions are formed symmetrically with respect to the one or more stepped portions on the other side face portion,

The step portions are each formed by forming such a recess: the recess portion protrudes from the outer surface side of the side surface portion toward the opposite direction and extends in a direction orthogonal to the opposite direction so that the step portion has, when seen from the opening direction: an upper wall portion which is flat and extends so as to horizontally protrude from an end edge of the side surface portion in the opposite direction; and a bottom wall portion connecting an end of the side wall portion and an end of the upper wall portion or connecting an end of the side wall portion and an end of one or more side wall portions extending downward from an end edge of the upper wall portion, and being inclined downward from the upper wall portion or the side wall portion toward the side wall portion.