Container

Abstract

To improve workability of stacking.SOLUTION: The container 1 includes a bottom wall component having a substantially rectangular shape in a plan view, and a side wall portion extending upward from each side portion of the bottom wall component, the bottom wall component includes a corner protrusion (16) located at a bottom wall corner portion of the bottom wall component and protruding downward from a lower surface of the bottom wall component, the side wall portion includes a main receiving portion (50) and a rail portion (52), and the rail portion (52) is provided adjacent to the main receiving portion (50).SELECTED DRAWING: Figure 6

Description

[Technical Field]

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

[0002] For example, as shown in Patent Document 1, a stackable container is known in which a plurality of containers are stacked vertically. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-331198 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when stacking containers, the bottom of the upper container is brought into contact with the upper edge of the lower container, and the upper container is slid along the upper edge of the lower container to form a stacked state. There is room for further improvement in the workability of stacking containers using this method.

[0005] An object of one aspect of the present invention is to improve the workability of stacking. [Means for solving the problem]

[0006] In order to solve the above problem, one embodiment of the container of the present invention is a container that can be stacked in a sliding manner, in which, during the stacking process of stacking multiple containers in a vertical direction, the bottom of an upper container is abutted against the upper edge of a lower container, and the upper container is slid along the upper edge of the lower container to achieve the stacked state, and the container comprises a bottom wall component that is approximately rectangular in plan view, and side wall components extending upward from each side edge of the bottom wall component, the bottom wall component being located at a bottom wall corner of the bottom wall component and comprising corner protrusions that protrude downward from the underside of the bottom wall component, the side wall components being located at container corners where the side wall components are connected, a first protrusion receiving portion that receives the corner protrusion of the upper container, and a rail portion that protrudes upward from at least a portion of the outer edge of the sliding surface of the side wall component along which the corner protrusion slides, and extends in a direction along the side edge of the side wall component, and the rail portion is provided adjacent to the first protrusion receiving portion. [Effects of the Invention]

[0007] According to one aspect of the present invention, it is possible to improve the workability of stacking. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 10 is a perspective view showing a state in which a plurality of containers are stacked. [Figure 2] FIG. 10 is a perspective view showing a state in which the slides are stacked. [Figure 3] FIG. 2 is a perspective view of the container seen from above. [Figure 4] FIG. 2 is a perspective view of the container as seen from below. [Figure 5] FIG. 2 is an enlarged perspective view of a corner of the container. [Figure 6] FIG. 10 is an enlarged perspective view showing a corner of the lower container in a slid-stacked state. [Figure 7] 10A and 10B are diagrams for explaining the configuration of a corner protrusion received in a main receiving portion and a bottom wall protrusion received in a protrusion receiving portion. [Figure 8]10 is a diagram showing the positional relationship between the bottom wall component of the upper container and the upper edge of the lower container when stacked. FIG. [Figure 9] FIG. 10 is a perspective view showing a state in which a plurality of containers of different sizes are stacked. [Figure 10] FIG. 1 is a perspective view of a small container viewed from above. [Figure 11] FIG. 1 is a perspective view of a small container viewed from below. [Figure 12] FIG. 10 is an enlarged perspective view of a corner of a small container. [Figure 13] 10 is a diagram showing the positional relationship between the bottom wall component of an upper container and the upper edge of a lower container when multiple containers of different sizes are stacked in layers. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Embodiment 1] An embodiment of the present invention will be described in detail below. In the following description, the vertical direction refers to the vertical direction of the container 1 when the bottom of the container 1 is positioned downward. The vertical direction is also the height direction of the container 1.

[0010] [Stacking of containers 1] As shown in FIG. 1, the container 1 is a container having a generally rectangular shape in a plan view. However, the container 1 may also have a generally square shape in a plan view. The container 1 is a container that can be stacked in layers, i.e., multiple containers are stacked vertically. In the following description, of the multiple stacked containers 1, the container 1 located at the bottom will be referred to as the lower container 1L, and the container 1 located at the top will be referred to as the upper container 1U.

[0011] As shown in FIG. 2, the upper container 1U can be slid and stacked on the lower container 1L. Here, slide stacking refers to the process of stacking multiple containers vertically by abutting the bottom of the upper container against the upper edge of the lower container and sliding the upper container along the upper edge of the lower container to form a stacked state. For example, the upper container 1U is slid in the direction indicated by arrow A against the upper edge of the lower container 1L, and the upper container 1U is stacked above the lower container 1L. Arrow A indicates the longitudinal direction of the container 1. Note that the upper container 1U may also be slid and stacked from the lateral direction of the container 1, i.e., a direction perpendicular to the direction of arrow A.

[0012] [Overview of Container 1] An overview of the container 1 will be described with reference to Figures 3 and 4. The container 1 includes a bottom wall constituent part 10. The bottom wall constituent part 10 has a generally rectangular shape in a plan view. In this embodiment, the bottom wall constituent part 10 has a generally rectangular shape in a plan view. The bottom wall constituent part 10 may also have a generally square shape in a plan view. The bottom wall constituent part 10 may be composed of a bottom wall part 11, a long side base part 12, and a short side base part 13. The bottom wall part 11 forms the bottom surface of the storage space that stores the contents of the container 1.

[0013] The bottom wall 11 is provided with a pair of opposing long side base portions 12. The long side base portions 12 are provided along the long side edges of the bottom wall 11. Each of the pair of long side base portions 12 is provided with a long side side wall portion 20. The bottom wall 11 is provided with a pair of opposing short side base portions 13. The short side base portions 13 are provided along the short side edges of the bottom wall 11. Each of the pair of short side base portions 13 is provided with a short side side wall portion 30.

[0014] As shown in Fig. 4, the bottom wall component 10 may include a partition 14. The partition 14 is formed by a plurality of lower surface ribs that protrude downward from the lower surface of the bottom wall 11. The partition 14 defines a plurality of spaces that open downward by the lower surface ribs. The partition 14 may be formed on the long side base 12 or the short side base 13.

[0015] The bottom wall constituent portion 10 has corner protrusions 16 that protrude downward from the underside of the bottom wall constituent portion 10. The corner protrusions 16 are located at the bottom wall corners of the bottom wall constituent portion 10 and are formed at the four corners of the bottom wall constituent portion 10. The corner protrusions 16 are formed on the undersides 12A of the long-side base portions 12 and the undersides 130 of the short-side base portions 13. The corner protrusions 16 are generally L-shaped when viewed from the top-bottom direction. The corner protrusions 16 are formed along the outer peripheral edge 15 of the bottom wall constituent portion 10, extending from the long-side base portions 12 to the short-side base portions 13. It is sufficient that the corner protrusions 16 are formed at at least one of the four bottom wall corners of the bottom wall constituent portion 10. Alternatively, the corner protrusions 16 may be formed on either the undersides 12A of the long-side base portions 12 or the undersides 130 of the short-side base portions 13. The corner protrusions 16 may be substantially rectangular when viewed from the top-bottom direction. The surfaces of the corner protrusions 16 that run along the outer peripheral edge 15 of the bottom wall constituent part 10 and face the inside of the container 1 are connected to the lower surface ribs (compartment parts 14). The portions of the corner protrusions 16 that connect the portions that run along the outer peripheral edge 15 of the bottom wall constituent part 10 to the lower surface ribs are substantially perpendicular to the direction along each side edge. The lower surfaces of the lower surface ribs (compartment parts 14), corner protrusions 16, etc. form a support portion that is supported on an installation surface such as a floor.

[0016] The bottom wall constituent part 10 may include a receiving part 17. The receiving part 17 is an opening formed in the long side base part 12 and opening downward. The receiving part 17 is an opening whose longitudinal direction is along the side edge of the long side side wall part 20. The direction along the side edge of the long side side wall part 20 is the longitudinal direction of the container 1 and also the direction along the side edge of the long side of the bottom wall constituent part 10. The direction along the side edge of the short side side wall part 30 is the lateral direction of the container 1 and also the direction along the side edge of the short side of the bottom wall constituent part 10.

[0017] The bottom wall constituent portion 10 may include a bottom wall protrusion 18. The bottom wall protrusion 18 protrudes downward from the lower surface of the bottom wall constituent portion 10. More specifically, the bottom wall protrusion 18 protrudes downward from the lower surface 12A of the long side base portion 12. The bottom wall protrusion 18 may be formed adjacent to the outer peripheral edge 15 of the bottom wall constituent portion 10 or adjacent to the receiving portion 17. The bottom wall protrusion 18 may also be formed on the short side base portion 13. The width of the bottom wall protrusion 18 in the direction along the side edges of the long side sidewall portions 20 is smaller than the width of the corner protrusions 16 in the direction along the side edges of the long side sidewall portions 20. The width of the bottom wall protrusion 18 in the direction along the side edges of the long side sidewall portions 20 may be greater than or equal to the width of the corner protrusions 16 in the direction along the side edges of the long side sidewall portions 20.

[0018] The bottom wall component 10 may include a restricting protrusion receiving portion 19. The restricting protrusion receiving portion 19 receives a protrusion of a container located below the container 1. The restricting protrusion receiving portion 19 is formed on the underside of the bottom wall portion 11. The restricting protrusion receiving portion 19 is surrounded on its entire periphery by the partition portion 14. In other words, the restricting protrusion receiving portion 19 is a portion where no underside ribs are formed. Note that the restricting protrusion receiving portion 19 may be configured such that a portion of its entire periphery is surrounded by the partition portion 14.

[0019] As shown in FIG. 3 , the container 1 includes a pair of opposing long-side sidewalls 20 and a pair of opposing short-side sidewalls 30 extending upward from corresponding side edges of the bottom wall component 10. The long-side sidewalls 20 and the short-side sidewalls 30 are examples of sidewalls. The pair of long-side sidewalls 20 are rotatably connected to the long-side base 12 by first hinges 21 provided at the lower ends of the long-side sidewalls 20. The pair of short-side sidewalls 30 are rotatably connected to the short-side base 13 by second hinges 31 provided at the lower ends of the short-side sidewalls 30.

[0020] In this embodiment, the container 1 is a foldable container that can be changed from an assembled state to a folded state. As shown in Fig. 3, the container 1 is in an assembled state in which it is assembled into a box shape by rotating the pair of long-side side walls 20 and the pair of short-side side walls 30 relative to the long-side base 12 and the short-side base 13, respectively, to an upright position. The container 1 is also in a folded state (not shown) by rotating the pair of long-side side walls 20 and the pair of short-side side walls 30, which are in an upright position, toward the inside of the container 1 relative to the long-side base 12 and the short-side base 13, respectively. Note that the container 1 may be a container that cannot be changed to a folded state. In other words, the pair of long side wall portions 20 and the pair of short side wall portions 30 do not have to be rotatable relative to the long side base portion 12 and the short side base portion 13, respectively, and the container 1 may also be one in which the pair of long side side wall portions 20, the pair of short side side wall portions 30, and the bottom wall component portion 10 are integrally formed.

[0021] [Configuration of the upper edge of the container 1] The detailed configuration of the upper edge of the container 1 will be described with reference to Figure 5. A main receiving portion 50 that receives the corner protrusion 16 of the upper container 1U is formed at the container corner of the container 1. The main receiving portion 50 is an example of a first protrusion receiving portion. The container corner of the container 1 is the portion where the long side wall portion 20 and the short side side wall portion 30 are connected. The main receiving portion 50 forms part of the upper edge of the container 1. The main receiving portion 50 is formed on the upper surface 22 of the long side wall portion 20 and the upper surface 32 of the short side side wall portion 30. The main receiving portion 50 is formed at the container corner of the container 1, extending from one end of the long-side side wall portion 20 in the direction along the side of the long-side side wall portion 20 to one end of the long-side side wall portion 20, and from one end of the short-side side wall portion 30 in the direction along the side of the short-side side wall portion 30 to one end of the short-side side wall portion 30 in the direction along the side of the short-side side wall portion 30. The main receiving portion 50 does not need to be formed at the four corners of the container 1, and may be formed at any one of the four container corners of the container 1.

[0022] The main receiving portion 50 may have a receiving portion restricting wall 51. The receiving portion restricting wall 51 is a wall that protrudes upward from the entire outer edge of the bottom surface of the main receiving portion 50 in the inside-outside direction of the container 1. The bottom surface of the main receiving portion 50 faces upward and is the surface against which the lower ends of the corner projections 16 of the upper container 1U received in the main receiving portion 50 abut. The receiving portion restricting wall 51 is composed of a wall 51A extending in a direction along the side edges of the long-side sidewall portions 20 and a wall 51B extending in a direction along the side edges of the short-side sidewall portions 30. The receiving portion restricting wall 51 abuts against the corner projections 16 of the upper container 1U received in the main receiving portion 50, thereby restricting horizontal movement of the upper container 1U. More specifically, movement of the upper container 1U in the direction along the side of the short-side side wall 30 is restricted by abutment between the wall 51A and a surface of the corner projection 16 of the upper container 1U that faces in the direction along the side of the short-side side wall 30. Movement of the upper container 1U in the direction along the side of the long-side side wall 20 is restricted by abutment between the wall 51B and a surface of the corner projection 16 of the upper container 1U that faces in the direction along the side of the long-side side wall 20. The main receiving portion 50 can also be said to be recessed downward from each of the top surface 22 and the top surface 32. The main receiving portion 50 is also generally L-shaped when viewed from the top-bottom direction.

[0023] The receiving portion restricting wall 51 does not need to be formed on the entire outer edge of the bottom surface of the main receiving portion 50, but may be formed on a part of the outer edge of the bottom surface of the main receiving portion 50. The receiving portion restricting wall 51 may have only a wall 51A extending in a direction along the side of the long side sidewall portion 20, or may have only a wall 51B extending in a direction along the short side sidewall portion 30. The receiving portion restricting wall 51 is formed on the long side sidewall portion 20 and the short side sidewall portion 30 (the wall 51A and the wall 51B are formed on the long side sidewall portion 20, and the wall 51B is formed on the short side sidewall portion 30), but may be formed on either the long side sidewall portion 20 or the short side sidewall portion 30.

[0024] The long-side sidewall 20 and the short-side sidewall 30 may each have an inclined portion 53 having an inclined surface. The inclined portion 53 is adjacent to the main receiving portion 50. The inclined surface of the inclined portion 53 slopes downward as it approaches the main receiving portion 50. That is, the inclined surface of the inclined portion 53 slopes toward the bottom of the main receiving portion 50 as it approaches the main receiving portion 50. The inclined portion 53 formed on the long-side sidewall 20 continues from the uppermost portion 23 located at the top of the top surface 22 of the long-side sidewall 20 and is located lower than the uppermost portion 23 in the vertical direction. The inclined portion 53 formed on the short-side sidewall 30 continues from the uppermost portion 33 located at the top of the top surface 32 of the short-side sidewall 30 and is located lower than the uppermost portion 33 in the vertical direction. Forming the inclined portion 53 makes it easier to insert the corner protrusion 16 of the upper container 1U into the main receiving portion 50.

[0025] The long-side sidewall portions 20 and the short-side sidewall portions 30 may have horizontal portions 54 having horizontal surfaces. The horizontal portions 54 are continuous with the inclined portions 53 and connected to the main receiving portion 50. One end of the horizontal portion 54 in the direction along the side edge of the sidewall portion (long-side sidewall portion 20 or short-side sidewall portion 30) connects to the inclined portions 53, and the other end of the horizontal portion 54 in the direction along the side edge of the sidewall portion (long-side sidewall portion 20 or short-side sidewall portion 30) connects to the main receiving portion 50. By forming the horizontal portions 54, it is possible to reduce the momentum of the corner protrusions 16 of the upper container 1U being introduced into the main receiving portion 50 via the inclined portions 53.

[0026] The inclined portion 53 and horizontal portion 54 formed on the long-side sidewall portion 20 are part of the upper surface 22 of the long-side sidewall portion 20. The inclined portion 53 and horizontal portion 54 formed on the short-side sidewall portion 30 are part of the upper surface 32 of the short-side sidewall portion 30. In other words, the inclined portion 53 and horizontal portion 54 constitute part of the upper edge portion of the container 1. The inclined portion 53 and horizontal portion 54 are located above the bottom surface of the main receiving portion 50 in the vertical direction. The inclined portion 53 and horizontal portion 54 may form a continuous, smooth surface without any steps. The inclined portion 53 and horizontal portion 54 may be formed on either the long-side sidewall portion 20 or the short-side sidewall portion 30. Either the inclined portion 53 or the horizontal portion 54 does not have to be formed on the long-side sidewall portion 20. If the horizontal portion 54 is not formed, the inclined portion 53 may be connected to the main receiving portion 50.

[0027] The long-side sidewall portion 20 and the short-side sidewall portion 30 may have opposing portions 55 formed thereon. The opposing portions 55 are formed adjacent to the main receiving portion 50. The opposing portions 55 formed on the long-side sidewall portion 20 have surfaces facing in a direction along the side edges of the long-side sidewall portion 20. That is, the opposing portions 55 formed on the long-side sidewall portion 20 have surfaces extending in a direction intersecting (e.g., substantially perpendicular to) the side edges of the long-side sidewall portion 20. More specifically, the opposing portions 55 formed on the long-side sidewall portion 20 have surfaces facing the adjacent corner protrusions 16 in the direction along the side edges of the long-side sidewall portion 20. The opposing portions 55 formed on the short-side sidewall portion 30 have surfaces facing in a direction along the side edges of the short-side sidewall portion 30. That is, the opposing portion 55 formed on the short-side side wall portion 30 has a surface that extends in a direction intersecting (e.g., a direction substantially perpendicular to) the side of the short-side side wall portion 30. More specifically, the opposing portion 55 formed on the short-side side wall portion 30 has a surface that faces the adjacent main receiving portion 50 in the direction along the side of the short-side side wall portion 30.

[0028] The facing portion 55 is located lower than the upper end of the rail portion 52 in the up-down direction. In this embodiment, the facing portion 55 is formed between the horizontal portion 54 and the main receiving portion 50 in the direction along the side of the side wall portion (long side side wall portion 20 or short side side wall portion 30). The facing portion 55 is located lower than the inclined portion 53 and the horizontal portion 54 in the up-down direction. The facing portion 55 formed on the long side side wall portion 20 is formed to protrude upward from the end of the bottom surface of the main receiving portion 50 in the direction along the side of the long side side wall portion 20. The facing portion 55 formed on the short side side wall portion 30 is formed to protrude upward from the end of the bottom surface of the main receiving portion 50 in the direction along the side of the short side side wall portion 30.

[0029] Rail portions 52 are formed on the long-side sidewall portions 20 and the short-side sidewall portions 30. The rail portions 52 are adjacent to the main receiving portion 50. The rail portions 52 protrude upward from at least a portion of the outer edge of the sliding surface of the sidewall portions for guiding the corner protrusions 16 of the upper container 1U into the main receiving portion 50 of the lower container 1L. The sliding surfaces of the long-side sidewall portions 20 are the uppermost portion 23, the inclined portion 53, and the horizontal portion 54 of the upper surface 22 of the long-side sidewall portion 20, and the sliding surfaces of the short-side sidewall portions 30 are the uppermost portion 33, the inclined portion 53, and the horizontal portion 54 of the upper surface 32 of the short-side sidewall portion 30. The rail portions 52 protrude upward from the outer edges of the inclined surface of the inclined portion 53 and the horizontal surface of the horizontal portion 54. The rail portions 52 may protrude upward from at least a portion of the outer edge of the uppermost portion 23 or the uppermost portion 33.

[0030] The rail portions 52 extend in a direction along the side edges of the side wall portions. More specifically, the rail portions 52 formed on the long-side side wall portions 20 extend in a direction along the side edges of the long-side side wall portions 20. The rail portions 52 formed on the long-side side wall portions 20 are connected to the wall 51A of the main receiving portion 50. The rail portions 52 formed on the short-side side wall portions 30 extend in a direction along the side edges of the short-side side wall portions 30. The rail portions 52 formed on the short-side side wall portions 30 are connected to the wall 51B of the main receiving portion 50. Note that the rail portions 52 may not be connected to either the wall 51A or the wall 51B, i.e., may be discontinuous with either the wall 51A or the wall 51B.

[0031] In the vertical direction, the upper end of the rail portion 52 formed on the long-side sidewall portion 20 may be located at the same position as the uppermost portion 23, and the upper end of the rail portion 52 formed on the short-side sidewall portion 30 may be located at the same height as the uppermost portion 33. That is, in the vertical direction, there may be no step between the upper end of the rail portion 52 and the uppermost portion 23, or between the upper end of the rail portion 52 and the uppermost portion 33. The rail portion 52 may be formed on either the long-side sidewall portion 20 or the short-side sidewall portion 30. Furthermore, the inclined portion 53 may be omitted, and the upper surface of the horizontal portion 54 may be the uppermost portion 23 or the uppermost portion 33. In this case, the upper end of the rail portion 52 is higher than the upper surface of the horizontal portion 54. Furthermore, the rail portion 52 may be formed over the entire length of the long-side sidewall portion 20 or the short-side sidewall portion 30.

[0032] 6, when sliding and stacking, the corner projections 16 of the upper container 1U sliding in the direction of arrow A on the inclined portions 53 and horizontal portions 54 of the lower container 1L come into contact with the rail portions 52 formed on the long-side sidewall portions 20, thereby being guided into the main receiving portion 50. More specifically, as the corner projections 16 of the upper container 1U slide on the inclined portions 53 and horizontal portions 54, the outer surfaces of the corner projections 16 facing outward from the container 1 come into contact with the inner surfaces of the rail portions 52 facing inward from the container 1, in the inward-outward direction of the container 1. That is, in the inward-outward direction of the container 1, the inner surfaces of the rail portions 52 facing inward from the container 1 function as guide surfaces that guide the corner projections 16 of the upper container 1U into the main receiving portion 50. When the corner protrusions 16 of the upper container 1U are slid in a direction perpendicular to the direction of arrow A, i.e., along the side edges of the short-side sidewall portions 30 of the container 1, to perform the sliding and stacking, the corner protrusions 16 of the upper container 1U come into contact with rail portions 52 formed on the short-side sidewall portions 30, and are guided into the main receiving portion 50. Furthermore, part of the receiving portion restricting wall 51 functions as a guide surface that guides the corner protrusions 16 of the upper container 1U into the main receiving portion 50 until the lower end portions of the corner protrusions 16 of the upper container 1U come into contact with the bottom surface of the main receiving portion 50 during the sliding and stacking.

[0033] As shown in FIG. 5 , a sub-receptor 60 may be formed on the long side wall 20. In this embodiment, two sub-receptors 60 are formed in the center of the long side wall 20 in the direction along the side edge. Note that it is sufficient for one or more sub-receptors 60 to be formed on the long side wall 20. Alternatively, the long side wall 20 may not have a sub-receptor 60. The sub-receptor 60 forms part of the upper edge of the container 1. The sub-receptor 60 may have a receptor limiting wall 61. The receptor limiting wall 61 is a wall that protrudes upward from the entire outer edge of the bottom surface of the sub-receptor 60 in the inward / outward direction of the container 1. The bottom surface of the sub-receptor 60 is an upward-facing surface that forms part of the upper surface 22 of the long side wall 20. Note that the receptor limiting wall 61 does not need to be formed along the entire outer edge of the bottom surface of the sub-receptor 60, but may be formed along part of the outer edge of the bottom surface of the sub-receptor 60. It can also be said that the sub-receiving portion 60 is recessed downward from the upper surface 22. The sub-receiving portion 60 is substantially I-shaped when viewed from the top-bottom direction.

[0034] The long side wall portion 20 may have an inclined portion 63 having an inclined surface. The inclined portion 63 is adjacent to the sub-receiving portion 60. The inclined surface of the inclined portion 63 has an inclined surface that slopes downward as it approaches the sub-receiving portion 60. In other words, the inclined surface of the inclined portion 63 slopes toward the bottom side of the sub-receiving portion 60 as it approaches the sub-receiving portion 60. The inclined portion 63 is continuous with the uppermost portion 23 and is located lower than the uppermost portion 23 in the up-down direction.

[0035] A horizontal portion 64 having a horizontal surface may be formed on the long-side side wall portion 20. The horizontal portion 64 continues from the inclined portion 63 and connects to the auxiliary receiving portion 60. One end of the horizontal portion 64 in the direction along the side of the long-side side wall portion 20 connects to the inclined portion 63, and the other end of the horizontal portion 64 in the direction along the side of the long-side side wall portion 20 connects to the auxiliary receiving portion 60.

[0036] The inclined portion 63 and the horizontal portion 64 are part of the upper surface 22 of the long side side wall portion 20. In other words, the inclined portion 63 and the horizontal portion 64 constitute part of the upper edge portion of the container 1. The inclined portion 63 and the horizontal portion 64 are located above the bottom surface of the auxiliary receiving portion 60 in the vertical direction. Either the inclined portion 63 or the horizontal portion 64 does not have to be formed on the long side side wall portion 20. If the horizontal portion 64 is not formed, the inclined portion 63 may be connected to the auxiliary receiving portion 60.

[0037] The long-side side wall portion 20 may have an opposing portion 65 formed thereon. The opposing portion 65 is formed adjacent to the sub-receiving portion 60. The opposing portion 65 has a surface facing in a direction along the side of the long-side side wall portion 20. That is, the opposing portion 65 has a surface extending in a direction intersecting (e.g., substantially perpendicular to) the side of the long-side side wall portion 20. More specifically, the opposing portion 65 has a surface facing the adjacent sub-receiving portion 60 in the direction along the side of the long-side side wall portion 20. The opposing portion 65 is located lower than the upper end of the rail portion 62 in the vertical direction. In this embodiment, the opposing portion 65 is formed between the horizontal portion 64 and the sub-receiving portion 60 in the direction along the side of the long-side side wall portion 20. The opposing portion 65 is located lower than the inclined portion 63 and the horizontal portion 64 in the vertical direction. The facing portion 65 is formed so as to protrude upward from the end of the bottom surface of the sub-receiving portion 60 in the direction along the side of the long-side sidewall portion 20.

[0038] A rail portion 62 may be formed on the long-side sidewall portion 20. The rail portion 62 is formed adjacent to the sub-receiving portion 60. The rail portion 62 protrudes upward from at least a portion of the outer edge of the sliding surface of the sidewall portion for guiding a corner protrusion of an upper container, which is different in size from the container 1, into the sub-receiving portion 60 of the lower container 1. The sliding surfaces of the long-side sidewall portion 20 along which the corner protrusion of the upper container, which is different in size from the container 1, slide are the uppermost portion 23, the inclined portion 63, and the horizontal portion 64 of the upper surface 22. The rail portion 62 protrudes upward from the outer edges of the inclined surface of the inclined portion 63 and the horizontal surface of the horizontal portion 64. The rail portion 62 may protrude upward from at least a portion of the outer edge of the uppermost portion 23. In the vertical direction, the inclined portion 63 may be omitted, and the upper surface of the horizontal portion 64 may be the uppermost portion 23. In this case, the upper end of the rail portion 62 is higher than the upper surface of the horizontal portion 64.

[0039] The rail portion 62 extends in a direction along the side of the long-side sidewall portion 20. The rail portion 62 is connected to the receiving portion restricting wall 61 of the sub-receiving portion 60. The rail portion 62 may not be connected to the receiving portion restricting wall 61, i.e., may be discontinuous with the receiving portion restricting wall 61. The upper end of the rail portion 62 may be located at the same position as the uppermost portion 23 in the vertical direction. In other words, there may be no step between the upper end of the rail portion 62 and the uppermost portion 23 in the vertical direction. The rail portion 62 does not have to be formed on the long-side sidewall portion 20. The rail portion 62 may be connected to the rail portion 52 formed on the long-side sidewall portion 20.

[0040] A partition 66 may be formed on the long-side side wall 20. The partition 66 is a wall that separates two sub-receiving sections 60 in a direction along the side of the long-side side wall 20. The partition 66 may include an opposing section 67 having a surface facing in a direction along the side of the long-side side wall 20. The upper end of the partition 66 is lower than the uppermost section 23 in the up-down direction. A rail section 69 may be formed on the upper surface of the partition 66, extending in a direction along the side of the long-side side wall 20. The sub-receiving section 60 may have a side wall protrusion 68 that protrudes upward from the bottom surface of the sub-receiving section 60.

[0041] A protrusion receiving portion 70 may be formed in the long side side wall portion 20. The protrusion receiving portion 70 receives the bottom wall protrusion 18 of the upper container 1U. The protrusion receiving portion 70 is an example of a second protrusion receiving portion. The protrusion receiving portion 70 is a recess formed in the uppermost portion 23 of the long side side wall portion 20. The protrusion receiving portion 70 constitutes part of the upper edge portion of the container 1. In the direction along the side of the long side side wall portion 20, it is located between the inclined portion 53 and the inclined portion 63.

[0042] The protrusion receiving portion 70 is configured so that the bottom wall protrusion 18 of the upper container 1U is not received in the protrusion receiving portion 70 of the lower container 1L when the corner protrusion 16 of the upper container 1U is slid over the upper edge (the upper surface of the long side wall portion 20) of the lower container 1L. More specifically, as shown in Fig. 7, the lower end of the bottom wall protrusion 18 is positioned higher than the lower end of the corner protrusion 16 in the vertical direction. In other words, the height H2 of the bottom wall protrusion 18 from the lower surface 12A of the long side base portion 12 to the lower end of the bottom wall protrusion 18 is lower than the height H1 of the corner protrusion 16 from the lower surface 12A of the long side base portion 12 to the lower end of the corner protrusion 16. Furthermore, in the direction along the side edge of the long-side sidewall portion 20, the distance L1 between the surface 16A of the corner protrusion 16 and the surface 18B of the bottom wall protrusion 18 is set to be the same as the distance L2 between the opposing portion 55 and the surface 70B of the protrusion receiving portion 70. The surface 16A of the corner protrusion 16 is the surface that faces the bottom wall protrusion 18 in the direction along the side edge of the long-side sidewall portion 20. The surface 70B of the protrusion receiving portion 70 is the surface that faces in the direction along the side edge of the long-side sidewall portion 20 and is the surface that is farthest from the opposing portion 55 in the direction along the side edge of the long-side sidewall portion 20. That is, surface 70B of protrusion receiving portion 70 is the surface that faces surface 70A of protrusion receiving portion 70 that is closest to opposing portion 55 in the direction along the side edge of long-side sidewall portion 20, and is the surface that faces the adjacent main receiving portion 50. Surface 18B of bottom wall protrusion 18 is the surface opposite surface 18A of bottom wall protrusion 18 that faces corner protrusion 16 in the direction along the side edge of long-side sidewall portion 20. Also, the size of protrusion receiving portion 70 is smaller than the size of main receiving portion 50 in the direction along the side edge of long-side sidewall portion 20.

[0043] As shown in Figure 8, when the corner protrusion 16 of the upper container 1U is received in the main receiving portion 50 of the lower container 1L, the bottom wall protrusion 18 of the upper container 1U is received in the protrusion receiving portion 70 of the lower container 1L. Note that in Figure 8, for ease of viewing the drawing, only a portion of the configuration of the bottom wall forming portion 10 of the stacked upper container 1U is shown.

[0044] [Embodiment 2] Other embodiments of the present invention will be described below. For ease of explanation, the same reference numerals will be used to designate components having the same functions as those described in the above embodiment, and the description thereof will not be repeated.

[0045] FIG. 9 shows a container set 100 including a container 1 and a container 2. The container 2 can be stacked vertically above the container 1, and is smaller in size than the container 1. As shown by reference numeral 9A in FIG. 9, the container 2 can be stacked above the container 1. As shown by reference numeral 9B in FIG. 9, the container 2 can be slid in the direction indicated by arrow B relative to the container 1 located below, thereby allowing for sliding stacking. The container 2 can also be slid and stacked relative to the container 1 in a direction perpendicular to the arrow B.

[0046] As shown by reference numeral 9C in Fig. 9, a container 1 can be stacked above multiple containers 2 arranged horizontally. As shown by reference numeral 9D in Fig. 9, the container 1 can be slid in the direction of arrow C relative to the multiple containers 2 positioned below for sliding stacking. Note that the container 1 can also be slid and stacked relative to the multiple containers 2 positioned below in a direction perpendicular to the direction of arrow C.

[0047] The configuration of container 2 will be described with reference to Figures 10 to 12. Although container 2 differs in size from container 1, its basic configuration is the same as that of container 1. Therefore, in the following description, only the configuration of container 2 that differs from container 1 will be described, and detailed description of the configuration that is the same as that of container 1 will be omitted. Furthermore, the component numbers of the components that make up container 2 are indicated in the 200 range, and the last two digits of the component numbers of the components of container 2 that correspond to those of container 1 are the same.

[0048] 10 and 11 , the bottom wall constituent portion 210 of the container 2 has the same configuration as the bottom wall constituent portion 10. The bottom wall portion 211, the long side base portion 212, and the short side base portion 213 that constitute the bottom wall constituent portion 210 have the same configuration as the bottom wall portion 11, the long side base portion 12, and the short side base portion 13 of the bottom wall constituent portion 10. In addition, the partition portion 214 and the corner protrusion portion 216 that the bottom wall constituent portion 210 has have the same configuration as the partition portion 14 and the corner protrusion portion 16 of the bottom wall constituent portion 10.

[0049] A protrusion receiving portion 216A that receives the side wall protrusion 68 of the upper container 1 in a stacked state may be formed on the lower surface of the bottom wall forming portion 210. The protrusion receiving portion 216A is an example of a third protrusion receiving portion. More specifically, the protrusion receiving portion 216A is formed on the lower surface of the corner protrusion 216. The protrusion receiving portion 216A is configured so that the protrusion receiving portion 216A of the upper container 2 is not received by the side wall protrusion 68 of the lower container 1 in a state in which the corner protrusion 216 of the upper container 2 is slid along the upper edge of the lower container 1. Furthermore, the main receiving portion 250 may have a main receiving portion protrusion (an example of a side wall protrusion) that protrudes upward from the bottom surface of the main receiving portion 250. In this case, when multiple containers 2 are stacked, the main receiving portion protrusion of the lower container 2 is received in the protrusion receiving portion 216A (an example of a third protrusion receiving portion) of the upper container 2. The main receiving portion 50 of the container 1 may be configured to have the above-mentioned main receiving portion protrusion, and a protrusion receiving portion that receives the main receiving portion protrusion formed on the main receiving portion 50 on the underside of the corner protrusion 16. In this case, when multiple containers 1 are stacked, the main receiving portion protrusion formed on the main receiving portion 50 of the lower container 1L is received in the protrusion receiving portion formed on the corner protrusion 16 of the upper container 1U.

[0050] The bottom wall forming portion 210 may include a bottom wall protrusion 218. Unlike the bottom wall protrusion 18 of the container 1, the bottom wall protrusion 218 of the container 2 protrudes downward from the lower surface of the short side base portion 213. Other configurations of the bottom wall protrusion 218 are the same as those of the bottom wall protrusion 18.

[0051] As shown in Fig. 10, the long-side sidewall portion 220 and the short-side sidewall portion 230 of the container 2 have the same configuration as the long-side sidewall portion 20 and the short-side sidewall portion 30. Furthermore, the main receiving portion 250 of the container 2 has the same configuration as the main receiving portion 50. As shown in Fig. 12, the receiving portion restricting wall 251 of the main receiving portion 250 has the same configuration as the receiving portion restricting wall 51. The inclined portion 253, the horizontal portion 254, and the rail portion 252 formed on the short-side sidewall portion 230 have the same configuration as the inclined portion 53, the horizontal portion 54, and the rail portion 52.

[0052] Restricting protrusions 256 are formed on the long-side sidewall 220. In this embodiment, two restricting protrusions 256 are formed on the long-side sidewall 220 adjacent to the main receiving portion 250 of the container 2. The upper end surface 256A of the restricting protrusion 256 forms part of the upper surface 222 of the long-side sidewall 220 and is a sliding surface that can slide over the corner protrusion 16 of the upper container 1. The upper end surface 256A is a horizontal plane. Note that the upper end surface 256A may be an inclined surface that slopes toward the bottom of the main receiving portion 250 as it approaches the main receiving portion 250. The restricting protrusions 256 are configured to be larger than the opening area of ​​the partition 14 of the container 1 so that they cannot be received in the partition 14. The restricting protrusion 256 may be configured so as not to be received in the partition 14 by making the shape of the restricting protrusion 256 different from the shape of the opening of the partition 14 of the container 1.

[0053] A rail portion 257 is formed on the outer edge of the upper end surface 256A of the restricting protrusion 256. The rail portion 257 extends in a direction along the side of the long-side sidewall portion 220. The upper end of the rail portion 257 is located at the top, which is the highest position of the long-side sidewall portion 220 in the up-down direction. In this embodiment, the rail portion 257 is not connected to the wall 251A of the receiving portion restricting wall 251 that extends in a direction along the long-side sidewall portion 220. In other words, the rail portion 257 and the wall 251A are not continuous.

[0054] The restricting protrusion 256 may have a facing portion 258 formed thereon. The facing portion 258 is formed adjacent to the main receiving portion 250. The facing portion 258 has a surface facing in a direction along the side of the long-side sidewall portion 220. That is, the facing portion 258 has a surface extending in a direction intersecting (e.g., substantially perpendicular to) the side of the long-side sidewall portion 220. More specifically, the facing portion 258 has a surface facing the adjacent main receiving portion 250 in the direction along the side of the long-side sidewall portion 220. In this embodiment, the facing portion 258 is the surface of the restricting protrusion 256 facing the adjacent main receiving portion 250 in the direction along the side of the long-side sidewall portion 220. The facing portion 258 is located below the upper end of the rail portion 257 in the up-down direction. The facing portion 258 is formed so as to protrude upward from the end of the bottom surface of the main receiving portion 250 in the direction along the side of the long side wall portion 220.

[0055] 10, a protrusion receiving portion 270 is formed in the short-side side wall portion 230. The protrusion receiving portion 270 differs from the protrusion receiving portion 70 in that it is formed in the short-side side wall portion 230, but other configurations are the same as those of the protrusion receiving portion 70. A recess 280 is formed between the two restricting protrusions 256 in the direction along the side of the long-side side wall portion 220.

[0056] Reference numeral 13A in FIG. 13 shows a state in which two containers 2 are stacked above a container 1. As shown by reference numeral 13A in FIG. 13, the corner protrusions 216 of the container 2 are received in the corresponding main receiving portion 50 and sub-receiving portion 60 of the container 1, respectively. The side wall protrusions 68 of the container 1 are received in the protrusion receiving portion 216A of the corner protrusions 216 of the container 2 received in the sub-receiving portion 60 of the container 1. The bottom wall protrusions 218 of the container 2 are received in the protrusion receiving portion 70 of the container 1. When the corner protrusions 216 of the container 2 abut against the main receiving portion 50 or the sub-receiving portion 60 of the container 1, the protrusion receiving portion 216A of the corner protrusions 216 of the container 2 abut against the side wall protrusions 68 of the container 1, and the bottom wall protrusions 218 of the container 2 abut against the protrusion receiving portion 70 of the container 1, horizontal movement of the container 2 relative to the container 1 is restricted.

[0057] Reference numeral 13B in Figure 13 shows a state in which a container 1 is stacked above two containers 2 that are lined up horizontally. As shown by reference numeral 13B in Figure 13, the corner protrusions 16 of the container 1 are received in the main receiving portions 250 of the corresponding containers 2. The bottom wall protrusions 18 of the container 1 are received in the protrusion receiving portions 270 of the container 2. The regulating protrusion 256 of the container 2 is received in the regulating protrusion receiving portions 19 of the container 1. When the corner protrusions 16 of the container 1 abut against the main receiving portions 250 of the container 2, when the bottom wall protrusions 18 of the container 1 abut against the protrusion receiving portions 270 of the container 2, and when the regulating protrusion 256 of the container 2 abuts against the regulating protrusion receiving portions 19 of the container 1, horizontal movement of the container 1 relative to the multiple containers 2 is restricted. In FIG. 13, for ease of viewing, only a portion of the configuration of the bottom wall constituent portion 10 or bottom wall constituent portion 210 of the upper container 1 or container 2 stacked is shown.

[0058] According to the containers 1 and 2 of the above-described embodiment, when the upper container (container 1 or 2) is slid relative to the upper edge of the lower container (container 1 or 2) to stack the containers 1 or 2, the corner projection (corner projection 16 or corner projection 216) of the upper container can be slid relative to the sliding surface of the lower container while abutting against the rail portion (rail portion 52, rail portion 252, or rail portion 257) of the lower container. Therefore, the corner projection of the upper container is guided by the rail portion into the first projection receiving portion. This allows the containers to be slid relatively smoothly until they are received in the main receiving portion of the lower container, improving the workability of stacking. Furthermore, the containers 2 can also be slid relative to the sliding surface of the container 1 while abutting the corner projection 216 of the upper container 2 against the rail portion 62 adjacent to the auxiliary receiving portion 60 of the lower container 1. This improves the workability of stacking. Furthermore, when removing an upper container (container 1 or container 2) from a stacked tier (disassembling the tier), one side edge may be lifted and pulled out. Because the rail portion (rail portion 52, rail portion 252, or rail portion 257) protrudes upward from the inclined surface of the inclined portion (inclined portion 53, inclined portion 63, or inclined portion 253) and the horizontal surface (i.e., the sliding surface) of the horizontal portion (horizontal portion 54, horizontal portion 64, or horizontal portion 254), the upper container can be easily removed by sliding the corner protrusion (corner protrusion 16 or corner protrusion 216) of the upper container against the rail portion (rail portion 52, rail portion 252, or rail portion 257) of the lower container while sliding it against the sliding surface of the lower container. This improves the workability of disassembling the tiers.

[0059] Furthermore, in the above-described embodiment, by providing container 1 or container 2 with an opposing portion (opposing portion 55, opposing portion 255, or opposing portion 258), when sliding and stacking, the opposing portion (opposing portion 55, opposing portion 255, or opposing portion 258) of the lower container (container 1 or container 2) does not hinder the sliding of the upper container (container 1 or container 2), and it is possible to restrict the movement of the upper container in the stacked state in the direction of the side edge. This makes it possible to prevent the stack of containers from collapsing when transporting them.

[0060] Furthermore, in the above-described embodiment, the protrusion receiving portion (protrusion receiving portion 70 or protrusion receiving portion 270) is configured so that the bottom wall protrusion (bottom wall protrusion 18 or bottom wall protrusion 218) of the upper container is not received in the protrusion receiving portion of the lower container when the upper container (container 1 or container 2) is sliding relative to the lower container (container 1 or container 2). When sliding and stacking, the bottom wall protrusion of the upper container is less likely to get caught on the lower container, allowing for relatively smooth sliding and stacking. Furthermore, when stacked, the effect of restricting movement of the upper container in the lateral direction relative to the lower container can be enhanced.

[0061] Furthermore, in the above-described second embodiment, when the upper container 2 is slid relative to the lower container 1, the side wall protrusion 68 of the lower container 1 is configured not to be received in the protrusion receiving portion 216A of the upper container 1. By forming the protrusion receiving portion 216A on the underside of the bottom wall component 210 (corner protrusion 216), the side wall protrusion 68 of the lower container 1 is less likely to get caught on the corner protrusion 216 of the upper container 2 when sliding and stacking, allowing for relatively smooth sliding and stacking. Furthermore, when stacked, the effect of restricting movement of the upper container 2 in the lateral direction relative to the lower container 1 can be improved. Furthermore, in the above-mentioned embodiment 1 or embodiment 2, if the main receiving portion (50, 250) has a main receiving portion protrusion that protrudes upward from the bottom surface of the main receiving portion (50, 250), and the corner protrusion (16, 216) has a protrusion receiving portion (e.g., 216A) that receives the main receiving portion protrusion, it may be configured so that when the upper container (1, 2) is slid relative to the lower container (1, 2), the main receiving portion protrusion of the lower container (1, 2) is not received in the protrusion receiving portion (e.g., 216A) of the upper container (1, 2).

[0062] Furthermore, according to the above-described second embodiment, even containers of different sizes (container 1 and container 2) can be slid and stacked. This improves the workability of stacking containers of different sizes.

[0063] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. [Explanation of symbols]

[0064] 1 container 10 Bottom wall component 16 Corner projection 20 Long side wall 30 Short side wall 50 Main receiving portion (first protrusion receiving portion) 52 Rail section

Claims

1. A container capable of slide stacking, in which a plurality of containers are stacked vertically, is placed in a stacked state by sliding the upper container along the upper edge of the lower container while abutting the bottom of the upper container against the upper edge of the lower container, a bottom wall component that is generally rectangular in plan view; side wall portions extending upward from each side edge portion of the bottom wall constituent portion; Equipped with the bottom wall constituent portion includes a corner protrusion located at a bottom wall corner portion of the bottom wall constituent portion and protruding downward from a lower surface of the bottom wall constituent portion, The side wall portion is a first projection receiving portion located at a container corner where the side wall portions are connected to each other, the first projection receiving portion receiving the corner projection of the upper container; a rail portion that protrudes upward from at least a part of an outer edge of the slide surface of the side wall portion on which the corner protrusion slides and extends in a direction along the side edge of the side wall portion, The rail portion is provided adjacent to the first protrusion receiving portion. container.

2. the side wall portion includes an opposing portion adjacent to the first protrusion receiving portion and having a surface facing in a direction along a side edge of the side wall portion; The facing portion is located lower than the upper end of the rail portion in the vertical direction. The container of claim 1.

3. the bottom wall constituent portion includes a bottom wall protrusion protruding downward from the side edge portion of the bottom wall constituent portion, The side wall portion is formed with a second projection receiving portion that receives the bottom wall projection of the upper container in the stacked state, When the corner protrusion is slid onto the upper edge of the lower container, the bottom wall protrusion of the upper container is not received in the second protrusion receiving portion of the lower container. The container of claim 1.

4. the side wall portion includes a side wall protrusion protruding upward from an upper surface of the side wall portion, a third projection receiving portion that receives the side wall projection of the lower container in the stacked state is formed on the lower surface of the bottom wall constituent portion; The third protrusion receiving portion is configured so that the third protrusion receiving portion of the upper container is not received by the side wall protrusion of the lower container when the corner protrusion is slid onto the upper edge portion of the lower container. The container of claim 1.

5. The containers include a first container having a first size and a second container having a second size smaller than the first size, The first container can be slidably stacked above a plurality of the second containers arranged in a horizontal direction, The second container can be slidably stacked above the first container. container.

Images