Lid member and container set

Abstract

To regulate the horizontal movement of a lid member covering a container group in an assembled state and a folded state.SOLUTION: The regulating protrusions (21) provided on the lid member (2) are formed corresponding to the arrangement of the first receiving recesses of the containers constituting the container group in the folded state and the arrangement of the second receiving recesses of the containers constituting the container group in the assembled state.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a lid member and a container set. [Background technology]

[0002] Patent Document 1 describes a lid member that is placed over an assembled container assembly made up of a plurality of folding containers. The lid member is equipped with anti-rattle protrusions. When the lid member is placed over an assembled container assembly made up of a plurality of folding containers in an assembled state, the anti-rattle protrusions substantially abut against the inner surfaces of each side wall portion at locations near each of the four corners of each folding container that constitutes the assembled container assembly. Furthermore, when the lid member is placed over a folding container assembly made up of a plurality of folding containers in a folded state, the anti-rattle protrusions substantially abut against auxiliary protrusions that protrude from both ends of the long-side base portion toward the short-side base portion and the long-side base portion at locations near each of the four corners of each base portion of each folding container that constitutes the folding container assembly. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-177904 Summary of the Invention [Problem to be solved by the invention]

[0004] One aspect of the present invention aims to restrict horizontal movement of a lid member placed over a group of assembled and folded containers by using a configuration different from that of Patent Document 1. [Means for solving the problem]

[0005] In order to solve the above-mentioned problems, a lid member according to one aspect of the present invention is a container including a bottom wall component including a bottom wall portion having a substantially rectangular shape in a plan view and a base portion provided along each side edge portion of the bottom wall portion, a pair of opposing first side wall portions rotatably connected to the base portion, and a pair of opposing second side wall portions rotatably connected to the base portion, wherein the container can be changed from an assembled state in which the pair of first side wall portions and the pair of second side wall portions are assembled into a box-like shape by rotating the pair of first side wall portions and the pair of second side wall portions to an upright position, to a folded state by rotating the pair of first side wall portions and the pair of second side wall portions inward from the upright position and folding them, and when a plurality of the containers in the assembled state or the folded state are placed adjacent to each other in the horizontal direction, multiple containers can be changed. a lid member that is placed over a group of several installed containers to cover them all at once, wherein the lid member has a plurality of regulating protrusions that protrude toward the bottom wall portion of the containers when placed over the group of containers, the base portion has a first receiving recess that receives the regulating protrusions when the lid member is placed over the group of containers in the folded state, and the containers have second receiving recesses that receive the regulating protrusions at the upper corners of the containers in the assembled state when the lid member is placed over the group of containers in the assembled state, and the regulating protrusions are formed to correspond to the arrangement of the first receiving recesses of the containers that make up the group of containers in the folded state and the arrangement of the second receiving recesses of the containers that make up the group of containers in the assembled state.

[0006] In order to solve the above-mentioned problems, a container set according to one aspect of the present invention is a container including a bottom wall component including a bottom wall portion having a generally rectangular shape in a plan view and a base portion provided along each side edge portion of the bottom wall portion, a pair of opposing first side wall portions rotatably connected to the base portion, and a pair of opposing second side wall portions rotatably connected to the base portion, wherein the container can be changed from an assembled state in which the pair of first side wall portions and the pair of second side wall portions are assembled into a box-like shape by rotating the pair of first side wall portions and the pair of second side wall portions to an upright position, to a folded state by rotating the pair of first side wall portions and the pair of second side wall portions inward from the upright position to fold the container, and the assembled state Alternatively, when the containers in the folded state are placed adjacent to each other in the horizontal direction, the container has a lid member that is placed to cover the group of containers collectively, and the lid member has a plurality of regulating protrusions that protrude toward the bottom wall portion of the containers when placed over the group of containers, the base portion has a first receiving recess that receives the regulating protrusions when the lid member is placed over the group of containers in the folded state, and the container has a second receiving recess that receives the regulating protrusions at an upper corner of the container in the assembled state when the lid member is placed over the group of containers in the assembled state. [Effects of the Invention]

[0007] According to one aspect of the present invention, horizontal movement of the lid members that cover the group of containers in the assembled state and the folded state can be restricted. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing a container set including a group of assembled containers. [Figure 2] FIG. 10 is a perspective view showing a container set including a group of containers in a folded state. [Figure 3] FIG. 2 is a perspective view showing the container in an assembled state. [Figure 4] FIG. 2 is a perspective view showing the container in a collapsed state. [Figure 5]FIG. 10 is an enlarged perspective view of a corner portion of the assembled container. [Figure 6] FIG. 10 is an enlarged perspective view of a corner portion of the container in a folded state. [Figure 7] FIG. 2 is a perspective view of the cover member as viewed from above. [Figure 8] FIG. 2 is a perspective view of the cover member as viewed from below. [Figure 9] FIG. 2 is an enlarged perspective view of a corner portion of the cover member. [Figure 10] 10 is a plan view showing the positional relationship of the regulating protrusions and the anti-rattle protrusions with respect to each container of the assembled container group. FIG. [Figure 11] 10 is a plan view showing the positional relationship of the restricting protrusions and the anti-rattle protrusions with respect to each container of the container group in the folded state. FIG. [Figure 12] FIG. 12 is an enlarged perspective view of the area indicated by the dashed line in FIG. 11. [Figure 13] FIG. 10 is a perspective view showing a state in which a plurality of cover members are stacked on a pallet. [Figure 14] FIG. 10 is an enlarged view of a corner portion of the stacked cover members. [Figure 15] FIG. 10 is a schematic view showing a cover member according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Embodiment] 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 10 when the bottom of the container 10 is positioned downward. The vertical direction also refers to the height direction of the container 10.

[0010] [Overview of container set 100] An overview of the container set 100 will be described with reference to Figures 1 and 2. Figure 1 is a perspective view showing the container set 100 including the assembled container group 1. Figure 2 is a perspective view showing the container set 100 including the folded container group 1.

[0011] As shown in FIGS. 1 and 2 , the container set 100 includes a container group 1 and a lid member 2. The container group 1 is composed of a plurality of containers 10 arranged adjacent to one another in the horizontal direction. In this embodiment, the container group 1 is composed of five containers 10. As shown in FIGS. 10 and 11 , the container group 1 is composed of a combination of three containers 10 arranged in the short direction of the containers 10 and two containers 10 arranged in the long direction of the containers 10. Note that the container group 1 may include a mixture of different types of containers 10, such as containers 10 of different sizes. The arrangement of the containers 10 constituting the container group 1 is not limited to the arrangement shown in FIGS. 10 and 11 . The number of containers 10 constituting the container group 1 is not limited to five. The arrangement of the containers 10 constituting the container group 1 can be set as appropriate depending on the number and types of containers 10, etc.

[0012] The containers 10 constituting the container group 1 can be changed from an assembled state 10A in which they are assembled into a box shape to a folded state 10B by folding each side wall portion of the container 10. In the container group 1 shown in FIG. 1, a plurality of containers 10 in the assembled state 10A are placed adjacent to one another in the horizontal direction. In the container group 1 shown in FIG. 2, a plurality of containers 10 in the folded state 10B are placed adjacent to one another in the horizontal direction. In this specification, a container group 1 constituted by a plurality of containers 10 in the assembled state 10A may be referred to as the "container group 1 in the assembled state," and a container group 1 constituted by a plurality of containers 10 in the folded state 10B may be referred to as the "container group 1 in the folded state." The container group 1 in the folded state shown in FIG. 2 is a state in which each of the containers 10 constituting the container group 1 in the assembled state shown in FIG. 1 is folded.

[0013] As shown in FIG. 1, the assembled container group 1 may be stackable, with multiple container groups 1 stacked vertically. However, it is not essential that the assembled container group 1 be stackable vertically. Also, as shown in FIG. 2, the folded container group 1 may be stackable vertically. However, it is not essential that the folded container group 1 be stackable vertically. As shown in FIGS. 1 and 2, the container group 1 may be placed on a pallet 3.

[0014] The lid member 2 is placed on the container group 1 so as to collectively cover the plurality of containers 10. As shown in Fig. 1, the lid member 2 can be placed on the container group 1 in an assembled state. As shown in Fig. 2, the lid member 2 can be placed on the container group 1 in a folded state.

[0015] [Configuration of container 10] The configuration of the containers 10 included in the container group 1 will be described in detail with reference to Figures 3 to 6. Figure 3 is a perspective view showing the container 10 in the assembled state 10A. Figure 4 is a perspective view showing the container 10 in the folded state 10B. Figure 5 is an enlarged perspective view of a corner portion of the container 10 in the assembled state 10A. Figure 6 is an enlarged perspective view of a corner portion of the container 10 in the folded state 10B.

[0016] As shown in FIG. 3, the container 10 has a bottom wall forming portion 11. The bottom wall forming portion 11 has a bottom wall portion 111, a long side base portion 112, and a short side base portion 113. The bottom wall portion 111 has a generally rectangular shape in a plan view. In this embodiment, the bottom wall portion 111 has a generally rectangular shape in a plan view. However, the bottom wall portion 111 may have a generally square shape in a plan view.

[0017] A pair of opposing long side base portions 112 are provided on the bottom wall portion 111. The long side base portions 112 are an example of a base portion. The long side base portions 112 are provided along the side edges on the long sides of the bottom wall portion 111. The pair of long side base portions 112 are provided with long side wall portions 12, respectively.

[0018] The long-side base portion 112 may be provided with auxiliary base portions 112B that protrude from both ends of the long-side base portion 112 in the direction along the side edges of the long-side sidewall portion 12 toward the short-side base portion 113. The auxiliary base portions 112B extend in the direction along the side edges of the short-side sidewall portion 13. End portions 112C of the auxiliary base portions 112B in the direction along the side edges of the short-side sidewall portion 13 are connected to the short-side base portion 113. The direction along the side edges of the long-side sidewall portion 12 is the longitudinal direction of the container 10 and is also the direction along the side edges of the long sides of the bottom wall portion 111. The direction along the side edges of the short-side sidewall portion 13 is the lateral direction of the container 10 and is also the direction along the side edges of the short sides of the bottom wall portion 111.

[0019] The bottom wall portion 111 is provided with a pair of opposing short side base portions 113. The short side base portions 113 are an example of a base portion. The short side base portions 113 are provided along the side edges on the short sides of the bottom wall portion 111. Each of the pair of short side base portions 113 is provided with a short side side wall portion 13. In this embodiment, the height in the vertical direction of the pair of short side base portions 113 is lower than the height in the vertical direction of the pair of long side base portions 112. Note that the height in the vertical direction of the pair of short side base portions 113 may be approximately the same as the height in the vertical direction of the pair of long side base portions 112.

[0020] The container 10 has a pair of opposing long-side sidewalls 12. The long-side sidewalls 12 are an example of first sidewalls. Each of the pair of long-side sidewalls 12 is rotatably connected to a long-side base 112. The long-side sidewalls 12 are rotatable relative to the long-side base 112 by first hinges 121 provided at the lower ends of the long-side sidewalls 12. When the container 10 is in the assembled state 10A, i.e., when the long-side sidewalls 12 are in an upright position, the lower ends of the long-side sidewalls 12 face the upper surfaces 112A of the long-side bases 112. The width of the upper surfaces 112A of the long-side bases 112 in the short direction of the container 10 may be approximately the same as the thickness of the long-side sidewalls 12. Therefore, when the long side wall portions 12 are in an upright position, there is no step at the boundary between the long side base portions 112 and the long side wall portions 12.

[0021] The container 10 has a pair of opposing short-side sidewalls 13. The short-side sidewalls 13 are an example of second sidewalls. Each of the pair of short-side sidewalls 13 is rotatably connected to a short-side base 113. The short-side sidewalls 13 are rotatable relative to the short-side base 113 by second hinges 131 provided at the lower ends of the short-side sidewalls 13. When the container 10 is in the assembled state 10A, i.e., when the short-side sidewalls 13 are in an upright position, the lower ends of the short-side sidewalls 13 face the upper surfaces of the short-side bases 113. The width of the upper surfaces of the short-side bases 113 in the longitudinal direction of the container 10 may be approximately the same as the thickness of the short-side sidewalls 13. Therefore, when the short-side side wall portion 13 is in an upright position, there is no step at the boundary between the short-side base portion 113 and the short-side side wall portion 13. The short-side side wall portion 13 may have a cutout portion 132. By forming the cutout portion 132, the short-side side wall portion 13 in an upright position does not interfere with the auxiliary base portion 112B.

[0022] The container 10 is in an assembled state 10A, in which it is assembled into a box shape, by rotating the pair of long-side side walls 12 and the pair of short-side side walls 13 relative to the long-side bases 112 and the short-side bases 113, respectively, to an upright position. As shown in Fig. 4, the container 10 is in a folded state 10B by rotating the pair of long-side side walls 12 and the pair of short-side side walls 13, which are in an upright position, toward the inside of the container 10 relative to the long-side bases 112 and the short-side bases 113, respectively. That is, the container 10 can change from the assembled state 10A to the folded state 10B.

[0023] When changing the state of the container 10 from the assembled state 10A to the folded state 10B, first, the pair of short side wall portions 13 are rotated toward the inside of the container 10 and folded. After the pair of short side wall portions 13 are folded, the pair of long side wall portions 12 are folded toward the inside of the container 10. This causes the container 10 to assume the folded state 10B. In the folded state 10B, the pair of long side side wall portions 12 are positioned above the pair of short side side wall portions 13. In addition, in the folded state 10B, the upper surface 112A of the long side base portion 112 is exposed. In the folded state 10B, the upper surface of the short side base portion 113 is mostly covered by the pair of long side side wall portions 12. It is also possible to fold the pair of long-side side walls 12, and then fold the pair of short-side side walls 13 toward the inside of the container 10. In this case, the vertical height of the pair of short-side base portions 113 may be equal to or greater than the vertical height of the pair of long-side base portions 112.

[0024] As shown in FIG. 3, the container 10 has four sidewall receiving recesses 14. The sidewall receiving recesses 14 are an example of second receiving recesses. The sidewall receiving recesses 14 are formed at the four upper corners of the container 10 in the assembled state 10A. The sidewall receiving recesses 14 receive restricting protrusions 21 (described below) of the lid member 2 when the lid member 2 is placed on the assembled container group 1. The sidewall receiving recesses 14 may receive a protrusion (not shown) formed on the bottom wall component 11 and protruding downward. This allows other containers 10 to be stacked on the container 10 in the assembled state 10A, and the sidewall receiving recesses 14 can restrict horizontal movement of the stacked containers 10.

[0025] The sidewall receiving recesses 14 are not limited to being formed at each of the four upper corners of the container 10 in the assembled state 10A. It is sufficient that the sidewall receiving recesses 14 are formed at at least one corner of the container 10.

[0026] Fig. 5 is an enlarged view of area A indicated by the dashed line in Fig. 3. As shown in Fig. 5, sidewall receiving recesses 14 are formed at the upper ends of long-side sidewall portion 12 and short-side sidewall portion 13. Sidewall receiving recesses 14 are formed at one end of long-side sidewall portion 12 in the direction along the side of long-side sidewall portion 12, and are also formed at one end of short-side sidewall portion 13 in the direction along the side of short-side sidewall portion 13.

[0027] Sidewall receiving recess 14 has a first sidewall receiving recess wall 141, a second sidewall receiving recess wall 142, a third sidewall receiving recess wall 143, a fourth sidewall receiving recess wall 144, and a sidewall receiving recess bottom wall 145. Note that sidewall receiving recess 14 only needs to have at least first sidewall receiving recess wall 141 and second sidewall receiving recess wall 142.

[0028] The first sidewall receiving recess wall 141 is a wall formed on the long-side sidewall portion 12 and extending in a direction along the side of the long-side sidewall portion 12. The second sidewall receiving recess wall 142 is a wall formed across the long-side sidewall portion 12 and the short-side sidewall portion 13. The second sidewall receiving recess wall 142 is a wall extending in a direction along the side of the short-side sidewall portion 13. The length of the first sidewall receiving recess wall 141 in a direction along the side of the long-side sidewall portion 12 (hereinafter referred to as the length of the first sidewall receiving recess wall 141) is approximately the same as the length of the second sidewall receiving recess wall 142 in a direction along the side of the short-side sidewall portion 13 (hereinafter referred to as the length of the second sidewall receiving recess wall 142). The length of the first sidewall receiving recess wall 141 may be longer or shorter than the length of the second sidewall receiving recess wall 142.

[0029] The third sidewall receiving recess wall 143 is formed on the long-side sidewall portion 12 and extends in a direction along the side of the short-side sidewall portion 13. The third sidewall receiving recess wall 143 faces the second sidewall receiving recess wall 142. The fourth sidewall receiving recess wall 144 is formed on the short-side sidewall portion 13 and extends in a direction along the side of the long-side sidewall portion 12. The fourth sidewall receiving recess wall 144 faces the first sidewall receiving recess wall 141. The sidewall receiving recess bottom wall 145 is a wall that connects the lower ends of the walls 141 to 144. The sidewall receiving recess bottom wall 145 is a wall that is formed across the long-side sidewall portion 12 and the short-side sidewall portion 13.

[0030] The first sidewall receiving recess wall 141 and the fourth sidewall receiving recess wall 144 abut against the restricting protrusion 21, thereby restricting movement of the lid member 2 in the direction along the side of the short-side sidewall portion 13. The second sidewall receiving recess wall 142 and the third sidewall receiving recess wall 143 abut against the restricting protrusion 21, thereby restricting movement of the lid member 2 in the direction along the side of the long-side sidewall portion 12. Note that, although the sidewall receiving recess 14 is configured to be formed across the long-side sidewall portion 12 and the short-side sidewall portion 13, the configuration is not limited to this.

[0031] 3, the container 10 may include one or more sidewall receiving recesses 15. The sidewall receiving recesses 15 are formed in the center portion in the direction along the side edges of the long sidewall portion 12. In this embodiment, two sidewall receiving recesses 15 are formed in the center portion in the direction along the side edges of the long sidewall portion 12.

[0032] The sidewall receiving recess 15 receives the restricting protrusion 21 of the lid member 2 when the lid member 2 is placed on the assembled container group 1. The sidewall receiving recess 15 may receive two or more restricting protrusions 21. The sidewall receiving recess 15 has at least one of a wall extending in a direction along the side of the long-side sidewall portion 12 and a wall extending in a direction along the side of the short-side sidewall portion 13. The restricting protrusion 21 abuts against the wall constituting the sidewall receiving recess 15, thereby restricting horizontal movement of the lid member 2. The sidewall receiving recess 15 may also be formed in the short-side sidewall portion 13.

[0033] As shown in FIG. 4, the pair of long side base portions 112 each include a base receiving recess 16. The base receiving recess 16 is an example of a first receiving recess. The base receiving recess 16 receives the restricting protrusion 21 of the lid member 2 when the lid member 2 is placed over the container group 1 in the folded state. The base receiving recess 16 may receive a protrusion (not shown) formed on the bottom wall component 11 that protrudes downward. This allows another container 10 to be stacked on the container 10 in the folded state 10B, and the base receiving recess 16 can restrict horizontal movement of the stacked containers 10.

[0034] The base receiving recesses 16 are formed at both ends of the long side base portion 112 in the direction along the side of the long side sidewall portion 12. That is, the base receiving recesses 16 are formed at the four corner portions of the container 10 in the folded state 10B. It is sufficient that the base receiving recesses 16 are formed at at least one corner portion of the container 10 in the folded state 10B. The base receiving recesses 16 and the sidewall receiving recesses 14 are formed in approximately the same position when the container 10 is viewed in a plan view. That is, when the container 10 in the assembled state 10A is viewed in a plan view, the base receiving recesses 16 and the sidewall receiving recesses 14 are located in overlapping positions.

[0035] FIG. 6 is an enlarged view of region B indicated by the dashed line in FIG. 4. As shown in FIG. 6, base receiving recess 16 is formed on top surface 112A of long side base portion 112. In this embodiment, base receiving recess 16 is formed across long side base portion 112 and auxiliary base portion 112B. Note that base receiving recess 16 may be formed only on both ends of long side base portion 112 in the direction along the side of long side side wall portion 12. Base receiving recess 16 has a first base receiving recess wall 161, a second base receiving recess wall 162, a third base receiving recess wall 163, and a base receiving recess bottom wall 164. First base receiving recess wall 161 is an example of a first wall, and second base receiving recess wall 162 is an example of a second wall.

[0036] The first foundation receiving recess wall 161 is a wall extending in a direction along the side of the long side side wall portion 12. The second foundation receiving recess wall 162 is a wall extending in a direction along the side of the short side side wall portion 13. In this embodiment, the second foundation receiving recess wall 162 is formed across the long side side base portion 112 and the auxiliary base portion 112B. Note that the second foundation receiving recess wall 162 may be formed only on the long side side base portion 112. In this embodiment, the length of the second foundation receiving recess wall 162 in a direction along the side of the short side side side wall portion 13 is longer than the width of the long side base portion 112 (the width in a direction along the side of the short side side wall portion 13). The length of the second base receiving recess wall 162 in the direction along the side of the short-side side wall portion 13 may be approximately the same as the width of the long-side base portion 112, or may be shorter.

[0037] The third base receiving recess wall 163 is a wall extending in a direction along the side of the short side wall portion 13 and faces the second base receiving recess wall 162. The base receiving recess bottom wall 164 is a wall connecting the lower ends of each of the walls 161 to 163. The base receiving recess 16 may also have a wall facing the first base receiving recess wall 161.

[0038] The first base receiving recess wall 161 abuts against the restricting protrusion 21, thereby restricting movement of the lid member 2 in the direction along the side of the short side wall portion 13. The second base receiving recess wall 162 and the third base receiving recess wall 163 abut against the restricting protrusion 21, thereby restricting movement of the lid member 2 in the direction along the side of the long side wall portion 12.

[0039] As shown in FIG. 4, the long side base portion 112 may have one or more base receiving recesses 17. The base receiving recesses 17 are formed in the center of the long side base portion 112 in the direction along the side of the long side side wall portion 12. In this embodiment, two base receiving recesses 17 are formed in the center of the long side base portion 112. The base receiving recesses 17 and the side wall receiving recesses 15 are formed in approximately the same position when the container 10 is viewed in a plan view. In other words, when the container 10 in the assembled state 10A is viewed in a plan view, the base receiving recesses 17 and the side wall receiving recesses 15 are located in overlapping positions.

[0040] The base receiving recess 17 receives the regulating protrusion 21 of the lid member 2 when the lid member 2 is placed over the container group 1 in the folded state. The base receiving recess 17 may receive two or more regulating protrusions 21. The base receiving recess 17 has at least one of a wall extending in a direction along the side of the long side side wall portion 12 and a wall extending in a direction along the side of the short side side wall portion 13. The horizontal movement of the lid member 2 is restricted by the wall constituting the base receiving recess 17 abutting against the regulating protrusion 21. The base receiving recesses 16 and 17 may also be formed in the short side base portion 113.

[0041] [Configuration of lid member 2] The detailed configuration of the lid member 2 will be described with reference to Figures 7 to 12. Figure 7 is a perspective view of the lid member 2 as viewed from above. Figure 8 is a perspective view of the lid member 2 as viewed from below. Figure 9 is an enlarged perspective view of a corner portion of the lid member 2. Figure 10 is a plan view showing the positional relationship of the regulating protrusions 21 and anti-rattle protrusions 22 with respect to each container 10 of the container group 1 in the assembled state. Figure 11 is a plan view showing the positional relationship of the regulating protrusions 21 and anti-rattle protrusions 22 with respect to each container 10 of the container group 1 in the folded state. Figure 12 is an enlarged perspective view of an area C indicated by a dashed line in Figure 11.

[0042] 7 and 8, the lid member 2 has a generally rectangular shape in a plan view. As shown in FIG. 8, the lid member 2 has a plurality of regulating protrusions 21 formed to protrude toward the bottom wall portion 111 of the containers 10 when the lid member 2 is placed over the container group 1. The lid member 2 may also have a plurality of anti-rattle protrusions 22 formed to protrude toward the bottom wall portion 111 of the containers 10 when the lid member 2 is placed over the container group 1. The regulating protrusions 21 and the anti-rattle protrusions 22 are provided on the lower surface 20B of the lid member 2. The lower surface 20B of the lid member 2 is the surface that faces the container group 1 when the lid member 2 is placed over the container group 1.

[0043] When the lid member 2 is placed over the container group 1 in the assembled state, the restricting protrusion 21 is received in the side wall receiving recess 14 of the container 10 that constitutes the container group 1. Also, when the lid member 2 is placed over the container group 1 in the folded state, the restricting protrusion 21 is received in the base receiving recess 16 of the container 10 that constitutes the container group 1.

[0044] The restricting protrusion 21 may be received in the sidewall receiving recess 15 of the container 10 included in the container group 1 when the lid member 2 is placed over the container group 1 in the assembled state. The restricting protrusion 21 may also be received in the base receiving recess 17 of the container 10 included in the container group 1 when the lid member 2 is placed over the container group 1 in the folded state.

[0045] The restricting protrusion 21 has a substantially square shape in a plan view. However, the shape of the restricting protrusion 21 is not limited to a substantially square shape in a plan view. The restricting protrusion 21 may have a circular, triangular, polygonal, L-shaped, or other shape in a plan view.

[0046] 10, the restricting protrusions 21 are formed to correspond to the arrangement of the sidewall receiving recesses 14 of the containers 10 that make up the container group 1 in the assembled state. The restricting protrusions 21 may also be formed to correspond to the arrangement of the sidewall receiving recesses 15 of the containers 10 that make up the container group 1 in the assembled state. That is, the sidewall receiving recesses 14 and 15 are each formed at a position that corresponds to the restricting protrusions 21.

[0047] 11, the restricting protrusion 21 is formed to correspond to the arrangement of the base receiving recess 16 of the container 10 that constitutes the container group 1 in the folded state. The restricting protrusion 21 may also be formed to correspond to the arrangement of the base receiving recess 17 of the container 10 that constitutes the container group 1 in the folded state. That is, the base receiving recess 16 and the base receiving recess 17 are each formed at a position that corresponds to the restricting protrusion 21.

[0048] 10 and 11, the restricting protrusions 21 are formed to correspond to the arrangement of the sidewall receiving recesses 14 located on the outer edge of the assembled container group 1 and the arrangement of the base receiving recesses 16 located on the outer edge of the folded container group 1. The restricting protrusions 21 are also formed to correspond to the arrangement of the sidewall receiving recesses 15 located on the outer edge of the assembled container group 1 and the arrangement of the base receiving recesses 17 located on the outer edge of the folded container group 1. The restricting protrusions 21 may be formed adjacent to the outer peripheral edge 20C of the lid member 2. Preferably, the restricting protrusions 21 are received in at least one sidewall receiving recess 14 and one base receiving recess 16 of each container 10 constituting the container group 1 when the lid member 2 is placed on the container group 1.

[0049] For example, when the lid member 2 is placed on a container group 1 consisting of different types of containers 10, such as containers 10 of different sizes, the multiple regulating protrusions 21 formed on the lid member 2 may include a regulating protrusion 21 that is received only in the sidewall receiving recess 14 and the sidewall receiving recess 15 formed on a specific type of container 10, or a regulating protrusion 21 that is received only in the base receiving recess 16 and the base receiving recess 17 of a specific type of container 10. Furthermore, when the lid member 2 is placed on a container group 1 consisting of different types of containers 10, a specific regulating protrusion 21 among the multiple regulating protrusions 21 formed on the lid member 2 may be configured to be shared by multiple types of containers 10 so as to be received in the sidewall receiving recess 14, the sidewall receiving recess 15, the base receiving recess 16, or the base receiving recess 17 of multiple types of containers 10.

[0050] 12, the length L1 of the first base receiving recess wall 161 in the direction along the side of the long-side side wall 12 is longer than the length L2 of the second base receiving recess wall 162 in the direction along the side of the short-side side wall 13. When the lid member 2 is placed over the container group 1 in the folded state, the length L3 of the regulating protrusion 21 of the side facing the second base receiving recess wall 162 is formed to be equal to or shorter than length L1. Length L3 is longer than length L2.

[0051] By making length L3 equal to or less than length L1, horizontal movement can be restricted by covering the same lid member 2 even if the pattern constituting the container group 1 changes, such as when (1) the long side (first base receiving recess wall 161) and the short side (second base receiving recess wall 162) of the wall of the long side base portion 112 of multiple adjacently installed container groups 1 are mixed, (2) containers with different side wall portions that fold first are mixed to form the container group 1, or (3) containers 10 of different sizes are mixed to form the container group 1.

[0052] 10, when the lid member 2 is placed on the assembled container group 1, the anti-rattle protrusion 22 is located inside each of the containers 10 in the assembled state 10A that make up the container group 1. The anti-rattle protrusion 22 abuts against the inner surface of at least one of the long side wall portion 12 and the short side wall portion 13 of the container 10 in the assembled state 10A, thereby restricting horizontal movement of the lid member 2.

[0053] 11 , when the lid member 2 is placed over the folded container group 1, at least a portion of the anti-rattle protrusion 22 is located on the long-side side wall portion 12 in the folded state 10B that constitutes the container group 1. The anti-rattle protrusion 22 abuts against the inner side of the long-side base portion 112 of the container 10 in the folded state 10B, thereby restricting horizontal movement of the lid member 2. Furthermore, if an auxiliary base portion 112B is provided, the anti-rattle protrusion 22 abuts against the inner side of the long-side base portion 112 and the inner side of the auxiliary base portion, thereby restricting horizontal movement of the lid member 2.

[0054] The anti-rattle protrusions 22 are L-shaped, U-shaped, or square-shaped in plan view. However, the shape of the anti-rattle protrusions 22 is not limited to these shapes in plan view. The shape of the anti-rattle protrusions 22 can be appropriately set depending on the type of container 10. As shown in FIG. 9, the anti-rattle protrusions 22 may be interconnected with the regulating protrusions 21.

[0055] The restricting protrusions 21 and the anti-rattle protrusions 22 are formed on the lid member 2 so as to accommodate an arrangement of the containers 1 constituting the container group 1 different from that shown in Figures 10 and 11. That is, the container group 1 may be configured with two containers 10 lined up in the longitudinal direction of the containers 10 at the top of the page and three containers 10 lined up in the longitudinal direction of the containers 10 at the bottom of the page, different from the arrangement shown in Figures 10 and 11. In a container group 1 configured in this manner, each restricting protrusion 21 is received in the sidewall receiving recesses 14, 15 and the base receiving recesses 16, 17, and the anti-rattle protrusions 22 are formed on the lid member 2 so as to be positioned inside each container 10 of the container group 1. This eliminates the need to change the orientation of the lid member 2 to cover the container group 1.

[0056] 7, a first recess 23 recessed toward the lower surface 20B may be formed on the upper surface 20A of the lid member 2, corresponding to the position where the restricting protrusion 21 is formed. Also, a second recess 24 recessed toward the lower surface 20B may be formed on the upper surface 20A of the lid member 2, corresponding to the position where the anti-rattle protrusion 22 is formed.

[0057] [Stacking of lid members 2] Figure 13 is a perspective view showing a state in which a plurality of lid members 2 are stacked on a pallet 3. Figure 14 is an enlarged view of a corner portion of the stacked lid members. As shown in Figure 13, the lid members 2 are stackable lids in which a plurality of lid members 2 are stacked vertically.

[0058] A plurality of cover members 2 may be stacked on the mounting surface of the pallet 3. The mounting surface of the pallet 3 is the upper surface of the pallet 3 when the pallet 3 is placed on the floor. The first recess 23 and the second recess 24 are formed in the cover member 2, so that the first recess 23 and the second recess 24 of the cover member 2 receive the restricting protrusion 21 and the anti-rattle protrusion 22 of the cover member 2 placed above, respectively.

[0059] 14, a flange 25 is formed on the outer peripheral edge 20C of the lid member 2, protruding in the opposite direction to the protruding direction of the restricting protrusion 21. The flange 25 abuts against the restricting protrusion 21 of the lid member 2 placed above, thereby restricting horizontal movement of the lid member 2 placed above. Note that instead of the flange 25, a protrusion may be provided around the entire periphery or part of the lid member 2.

[0060] A flange portion 31 is formed on the outer peripheral edge of the pallet 3, protruding upward from the mounting surface of the pallet 3. The flange portion 31 is an example of a protrusion. The flange portion 31 faces the restricting protrusion 21 of the lid member 2 placed on the mounting surface of the pallet 3. The flange portion 31 restricts horizontal movement of the lid member 2 by abutting against the restricting protrusion 21 of the lid member 2 placed on the mounting surface of the pallet 3. Note that instead of the flange portion 31, a protrusion may be provided around the entire circumference or part of the circumference of the pallet 3.

[0061] With this configuration, when the container group 1 is not in use and the lid members 2 are not covered with them, the lid members 2 can be stored in the pallet 3. Furthermore, the lid members 2 placed on the placement surface of the pallet 3 are restricted from moving in the horizontal direction by the restricting protrusions 21 coming into contact with the flanges 31. This reduces the amount of horizontal displacement of the lid members 2 placed on the pallet 3.

[0062] Furthermore, the flange portion 31 is located slightly outside the side of the pallet 3 that forms the fork insertion hole through which the forks of a forklift can be inserted, and the lower end of the pallet 3 is located slightly inside the side of the pallet 3 that forms the fork insertion hole.Therefore, when the pallets 3 are stacked on top of each other, the lower end of the upper pallet 3 is received by the flange portion 31 of the lower pallet 3, thereby restricting the horizontal movement of the stacked pallets 3.

[0063] The container 10, lid member 2, and pallet 3 described above are made of a resin material (such as polypropylene or polyethylene). The outer surface of the flange portion 31 of the pallet 3, the outer surfaces of the containers that make up the container group 1 in the assembled or folded state, and the outer surface of the outer peripheral edge portion 20C of the lid member 2 (including the flange portion 25) are substantially flush with each other. Note that the term "substantially" does not strictly specify a specific state, but rather includes a range of error or precision that is commonly accepted for an article made of a resin material.

[0064] With the lid member 2 and container set 100 described above, the restricting protrusion 21 can be received in the sidewall receiving recess 14 when the lid member 2 is placed over the assembled container group 1, and the restricting protrusion 21 can be received in the base receiving recess 16 when the lid member 2 is placed over the folded container group 1. This makes it possible to restrict horizontal movement by placing the lid member 2 over the assembled and folded container group 1. Furthermore, because the restricting protrusion 21 is received in the sidewall receiving recesses 14, 15 or the base receiving recesses 16, 17, the contact area of ​​the restricting protrusion 21 increases. This makes it possible to effectively restrict horizontal movement of the lid member 2.

[0065] [Modification] A modified example of the lid member 2 according to one embodiment of the present invention will be described with reference to Fig. 15. Fig. 15 is a schematic diagram showing a lid member 2A according to the modified example. Reference numeral 200 in Fig. 15 is a schematic cross-sectional view showing the configuration of the lid member 2A. Reference numeral 200 in Fig. 15 is a schematic diagram showing a state in which a plurality of lid members 2A are stacked.

[0066] As indicated by reference numeral 200 in Figure 15, the restricting protrusion 21 is formed in the central portion of the lid member 2A. The central portion of the lid member 2A includes the center of gravity of the lid member 2A and the area surrounding the center of gravity. As indicated by reference numeral 201 in Figure 15, the lid members 2A can be stacked in layers, with multiple lid members 2A stacked vertically on the mounting surface of the pallet 3. The restricting protrusion 21 abuts against the mounting surface of the pallet 3 when the lid member 2A is placed on the pallet 3.

[0067] According to the configuration of this modified example, the restricting protrusion 21 formed in the center of the lid member 2A abuts against the pallet 3. Therefore, when multiple lid members 2A are stacked on the pallet 3, the weight of the stacked lid members 2A will cause the center of the lowest lid member 2A to bend, preventing deformation of the lid member 2A. Furthermore, the restricting protrusion 21 in the center of the lid member 2A also has the function of restricting horizontal movement of the lid member 2A placed over the container group 1. This allows the structure of the lid member 2 to be simplified.

[0068] 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]

[0069] 1 container group 2 Cover member 3 palettes 10 containers 11 Bottom wall component 12 Long side wall 13 Short side wall 14, 15 Side wall receiving recess 16, 17 Base receiving recess 21 Regulating protrusion 22 Anti-rattle protrusion 23 First recess 24 Second recess 100 container set 111 Bottom wall 112 Long side base 113 Short side base 161 First base receiving recess wall 162 Second base receiving recess wall

Claims

1. a bottom wall component including a bottom wall portion having a generally rectangular shape in a plan view and a base portion provided along each side edge of the bottom wall portion; a pair of opposing first sidewall portions rotatably connected to the base portion; a pair of opposing second sidewall portions rotatably connected to the base portion; A container comprising: The container comprises: the state can be changed from an assembled state in which the pair of first side wall portions and the pair of second side wall portions are rotated to an upright position to be assembled into a box shape to a folded state by rotating the pair of first side wall portions and the pair of second side wall portions inward from the upright position to be folded, A lid member that is placed to collectively cover a group of the containers when the containers in the assembled state or the folded state are placed adjacent to each other in the horizontal direction, The cover member is a plurality of restricting protrusions formed to protrude toward the bottom wall portions of the containers when the container is placed over the group of containers; The base portion is a first receiving recess into which the restricting protrusion is received when the lid member is placed over the container group in the folded state; The container comprises: a second receiving recess in which the restricting protrusion is received at an upper corner of the container in the assembled state when the lid member is placed over the container group in the assembled state; The restricting protrusion is the first receiving recesses of the containers constituting the container group in the folded state and the second receiving recesses of the containers constituting the container group in the assembled state are formed corresponding to each other. A cover member characterized by:

2. The first receiving recess includes: a first wall extending in a direction along a side edge of the first side wall portion; a second wall extending in a direction along a side edge of the second side wall portion; Equipped with The restricting protrusion is When the lid member is placed over the container group in the folded state, the length of the side edge of the restricting protrusion facing the second wall is formed to be equal to or shorter than the length of the first wall. The cover member according to claim 1 .

3. The cover member can be stacked in layers, with multiple cover members stacked vertically on the mounting surface of the pallet, When the lid member is placed on the pallet, the restricting protrusion abuts against the placement surface and faces in the horizontal direction a protrusion protruding upward from the placement surface of the pallet. The cover member according to claim 1 or 2.

4. a bottom wall component including a bottom wall portion having a generally rectangular shape in a plan view and a base portion provided along each side edge of the bottom wall portion; a pair of opposing first sidewall portions rotatably connected to the base portion; a pair of opposing second sidewall portions rotatably connected to the base portion; A container comprising: The container comprises: the state can be changed from an assembled state in which the pair of first side wall portions and the pair of second side wall portions are rotated to an upright position to be assembled into a box shape to a folded state by rotating the pair of first side wall portions and the pair of second side wall portions inward from the upright position to be folded, a lid member that is provided to cover a group of the containers when the containers in the assembled state or the folded state are placed adjacent to each other in the horizontal direction, and The cover member is a plurality of restricting protrusions formed to protrude toward the bottom wall portions of the containers when the container is placed over the group of containers; The base portion is a first receiving recess into which the restricting protrusion is received when the lid member is placed over the container group in the folded state; The container comprises: When the lid member is placed over the container group in the assembled state, the lid member has a second receiving recess in which the restricting protrusion is received at an upper corner of the container in the assembled state. A container set comprising:

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