Lid body and container with the same

Abstract

To quickly discharge a liquid on a lid body.SOLUTION: A lid body (2) covers an opening (15) formed in an upper part of a container body (1). A first lid body (20) of the lid body (2) includes a pair of opposing first sides (201, 202), and a pair of opposing second sides (203, 204). A continuous liquid flow groove (24) extending from one (203) of the second sides (203, 204) to the other (204) is formed on an upper surface.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a lid for closing an opening formed in an upper portion of a container. [Background technology]

[0002] Conventionally, a configuration is known in which water accumulated on the upper surface of a lid that closes an opening formed above a container is drained to the outside of the lid through a groove formed on the upper surface of the lid. For example, Patent Document 1 describes a lid in which a water reservoir and a drainage channel are formed for draining water to the outside of the lid. The water reservoir is connected to a drainage channel for draining water to the outside of the lid. The drainage channel is formed in a complex manner on the lid, and the end of the drainage channel is connected to the water reservoir. Water on the lid is collected in the water reservoir through each drainage channel and drained to the outside of the lid through the drainage channel. This allows the water on the lid to naturally drain to the outside of the lid. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 57-052469 Summary of the Invention [Problem to be solved by the invention]

[0004] By the way, there are times when it is necessary to quickly drain the water on the lid by tilting the lid, etc. However, in the lid of Patent Document 1, the drainage path is formed in a complicated manner. Therefore, when the lid is tilted, there is a possibility that the water flowing along the drainage path will flow into the drainage path extending in a direction intersecting the tilt direction of the lid, or that the water will remain in the drainage path extending in a direction intersecting the tilt direction of the lid. Therefore, there is a problem that the water on the lid cannot be quickly drained.

[0005] An object of one aspect of the present invention is to quickly drain liquid from above the lid. [Means for solving the problem]

[0006] In order to solve the above problems, a lid body according to one embodiment of the present invention is a lid body that covers an opening formed above a container body, and includes a pair of opposing first side edge portions and a pair of opposing second side edge portions, and has a series of liquid flow grooves formed on the upper surface extending from one second side edge portion to the other second side edge portion of the pair of second side edge portions. Effect of the Invention

[0007] According to one aspect of the present invention, liquid on the lid can be quickly drained. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view of a foldable container according to a first embodiment of the present invention, as viewed from above. [Diagram 2] 2 is a perspective view of the foldable container shown in FIG. 1, as viewed from below. [Diagram 3] FIG. 2 is a perspective view of the foldable container with the lid open, as viewed from above. [Figure 4] FIG. 4 is a side view of the foldable container with the lid open. [Diagram 5] 1 is a perspective view of a foldable container in the middle of changing from an assembled state to a folded state, as viewed from above; FIG. [Figure 6] FIG. 2 is a perspective view of the foldable container in a folded state, as viewed from above. [Figure 7] FIG. 4 is a top view of the first cover seen from above. [Figure 8] 8 is a cross-sectional view taken along line AA of the first cover shown in FIG. 7. [Figure 9] 4 is an enlarged cross-sectional view showing a portion where the first lid body and the second lid body overlap in the vertical direction when the first lid body and the second lid body are in a closed position. FIG. [Figure 10] FIG. 11 is a perspective view showing an example of a state in which a plurality of foldable containers are stacked. [Figure 11] FIG. 11 is an enlarged view of a region R in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] [Embodiment] An embodiment of the present invention will be described in detail below. In the following description, the up-down direction refers to the up-down direction of the foldable container 100 in a state in which the bottom of the foldable container 100 is positioned downward. The up-down direction also refers to the height direction of the foldable container 100.

[0010] [Overview of the foldable container 100] The foldable container 100 is a container that can change state between an assembled state in which it is assembled into a box shape as shown in Fig. 1 and a folded state in which it is folded as shown in Fig. 6. The foldable container 100 is also a container that can be stacked in multiple layers in the vertical direction as shown in Fig. 10. The foldable container 100 is an example of a container of the present invention. The foldable container 100 is made of resin, such as polypropylene.

[0011] As shown in Figs. 1 to 4, the folding container 100 includes a container body 1 and a lid body 2. As shown in Fig. 3, an opening 15 is formed at the top of the rectangular parallelepiped container body 1. The lid body 2 is rotatable between a maximum open position shown in Fig. 3, where the lid body 2 is most open, and a closed position shown in Fig. 1, where the lid body 2 is closed. When the lid body 2 is in the closed position, the opening 15 is closed. The container body 1 is made up of a bottom wall 11, a first side wall 12, a second side wall 13, and an upper frame 14.

[0012] (Bottom wall portion 11) 2 and 3, the bottom wall 11 is generally rectangular in plan view and is located at the bottom of the folding container 100. As shown in FIG. 2, a rib 112 is formed on the outer periphery of the bottom wall 11, protruding downward from the lower surface of the bottom wall 11. The rib 112 is formed around the outer periphery of the bottom wall 11. The bottom wall 11 is formed with a mesh-like rib protruding downward from the lower surface of the bottom wall 11 within an area surrounded by the rib 112. As shown in FIG. 3, a lower hinge portion 124 is provided on a side portion of the bottom wall 11 in a first direction, which is the longitudinal direction.

[0013] A lower frame portion 111 is formed on the outer periphery of the bottom wall portion 11. The lower frame portion 111 protrudes from the outer periphery of the bottom wall portion 11 toward the outside of the folding container 100. A supported portion 113 is formed on the lower surface of the lower frame portion 111 and is supported by a support portion 27 formed on the lid body 2 of the lower folding container 100 in the stack. The supported portion 113 is formed on the lower surface of a short side portion of the lower frame portion 111. The supported portion 113 is formed by a rib 112 and a surrounding wall 114.

[0014] The surrounding wall 114 is a rib-like wall that protrudes downward from the underside of the lower frame portion 111, and is formed to correspond to the position of the supporting portion 27 of the lower folding container 100 in the stack. The surrounding wall 114 is located on the outer side of the containers than the ribs 112. In the stacked state, the supported portion 113 (surrounding wall 114) of the upper folding container 100 and the supporting portion 27 of the lower folding container 100 abut against each other.

[0015] The surrounding wall 114 is located outside the bottom wall portion 11. Therefore, when the foldable containers 100 are stacked, the load applied to the foldable containers 100, i.e., the load applied to the lowest foldable container 100, can be supported by the outside of the containers.

[0016] (First side wall portion 12) As shown in Fig. 3, a pair of opposing first side walls 12 extend upward from the side edges of the bottom wall 11. The first side wall 12 is a side wall along the longitudinal direction of the folding container 100. As shown in Fig. 1 etc., in this embodiment, the first side wall 12 is divided into two parts, a first upper wall 121 and a first lower wall 122, approximately at the center in the up-down direction. Note that the first side wall 12 may be divided into three or more parts.

[0017] 3, an upper side of the first upper wall portion 121 is rotatably connected to the upper frame portion 14 by an upper hinge portion 123, and a lower side of the first lower wall portion 122 is rotatably connected to the bottom wall portion 11 by a lower hinge portion 124. The lower side of the first upper wall portion 121 and the upper side of the first lower wall portion 122 are rotatably connected to each other by an intermediate hinge portion 125.

[0018] (Second side wall portion 13) A pair of opposing second side walls 13 extend upward from the sides of the bottom wall 11. The second side walls 13 are side walls that extend along a second direction, which is the short side direction of the folding container 100. The second direction may be the long side direction of the folding container 100. As shown in FIG. 3, the second side wall 13 is rotatably connected to the upper frame 14 via a plurality of hinges 131. This allows the second side wall 13 to rotate toward the inside of the folding container 100, as shown by arrow X in FIG. 3.

[0019] (Top frame part 14) 3, the upper frame 14 has a generally rectangular shape in a plan view, and is provided along the upper sides of the first side wall 12 and the second side wall 13. The upper frame 14 forms an upper opening 15 of the folding container 100. A pair of long sides of the upper frame 14 are each provided with a hinge 141. The hinge 141 is each connected to a lid shaft 22 of the lid 2.

[0020] 1 and 2, a storage portion 142 is formed on each of the outer surfaces of a pair of long sides of the upper frame portion 14. The storage portion 142 is a recess that can receive the support portion 27 of the lid body 2 when positioned at the maximum open position. The storage portion 142 is formed in the upper frame portion 14 in correspondence with the position of the support portion 27 of the lid body 2 when positioned at the maximum open position. The storage portion 142 allows the lid body 2 when positioned at the maximum open position to be positioned along the first side wall portion 12.

[0021] 3, upper frame regulating protrusions 143 are formed on a pair of short sides of the upper frame portion 14, protruding upward from the upper surface of the upper frame portion 14. The upper frame regulating protrusions 143 are protrusions that can come into contact with the ribs 112 of the upper folding container 100 when the lid body 2 of the lower folding container 100 is positioned in the maximum open position and when the folding container 100 is stacked on top. The upper frame regulating protrusions 143 regulate longitudinal displacement of the upper folding container 100.

[0022] As shown in Fig. 4, a step portion 16 is formed between the upper frame portion 14 and the first side wall portion 12. By forming the step portion 16, the outer surface of the first side wall portion 12 can be positioned closer to the inside of the container than the outer surface of the upper frame portion 14 in the short side direction. That is, the step portion 16 forms a space recessed inward of the container body 1 between the upper frame portion 14 and the first side wall portion 12, capable of receiving the restricting protrusion 28 of the lid body 2 when positioned at the maximum open position. That is, the step portion 16 forms a recess capable of receiving the restricting protrusion 28 of the lid body 2 when positioned at the maximum open position.

[0023] By forming the step portion 16, when the lid body 2 is positioned at the maximum open position, the restricting protrusion 28 is disposed within a space recessed inwardly of the container body 1, which is formed between the upper frame portion 14 and the first side wall portion 12. Therefore, it is possible to dispose the lid body 2 along the first side wall portion 12. This makes it possible to reduce working space and storage space.

[0024] (Lid 2) The lid body 2 is rotatable relative to the container body 1 and is capable of closing an opening 15 at the top of the folding container 100. More specifically, the opening 15 is closed by two lid bodies 2. In the following description, one of the two lid bodies 2 will be referred to as a first lid body 20 and the other lid body 2 will be referred to as a second lid body 21.

[0025] The lid 2 has a lid shaft 22 connected to a hinge 141 of the upper frame 14, and is rotatable relative to the upper frame 14. More specifically, the lid shaft 22 of the first lid 20 is attached to the hinge 141 provided on one long side of the upper frame 14, and the lid shaft 22 of the second lid 21 is attached to the hinge 141 provided on the other long side of the upper frame 14.

[0026] A detailed configuration of the first lid body 20 will be described with reference to Figs. 7 to 9. The configuration of the second lid body 21 is similar to that of the first lid body 20. Therefore, a description of the configuration of the second lid body 21 will be omitted. In addition, in the description of the first lid body 20, the up-down direction is based on a state in which the first lid body 20 is located in the closed position.

[0027] As shown in FIG. 7, the first lid body 20 is a lid body having a generally rectangular shape in a plan view. The first lid body 20 includes a pair of opposing first side edge portions 201, 202 and a pair of opposing second side edge portions 203, 204. The first side edge portions 201, 202 and the second side edge portions 203, 204 are side edge portions that respectively constitute a part of the outer shape of the first lid body 20 when the first lid body 20 is viewed from the upper surface side of the first lid body 20. The second side edge portions 203, 204 are side edge portions that extend in a direction perpendicular to the first side edge portions 201, 202. In this embodiment, the first side edge portions 201, 202 are side edge portions that correspond to the longitudinal direction of the folding container 100, and the second side edge portions 203, 204 are side edge portions that correspond to the lateral direction of the folding container 100. The first lid 20 has a base 23 , a liquid flow groove 24 , and a tip configuration portion 25 .

[0028] The base 23 is located on the first side portion 201 side of the pair of first side portions 201, 202. A lid shaft portion 22 is provided on the base 23. The tip configuration portion 25 is located on the other first side portion 202 side of the pair of first side portions 201, 202. In other words, the tip configuration portion 25 of the first lid 20 is located on the second lid 21 side.

[0029] A liquid flow groove 24 is formed on the upper surface of the first lid body 20. The liquid flow groove 24 constitutes a flow path through which liquid accumulated on the upper surface of the first lid body 20 flows when the first lid body 20 is tilted. The upper surface of the first lid body 20 faces upward when the first lid body 20 is positioned in the closed position. The surface constituting the upper surface of the first lid body 20 includes a surface constituting the liquid flow groove 24. The liquid flow groove 24 is located between the base portion 23 and the tip forming portion 25 in the opposing direction D1 of the pair of first side edge portions 201, 202. The liquid flow groove 24 is constituted by a groove bottom portion 240 and a pair of groove wall portions 241, 243.

[0030] The groove bottom 240 constitutes the bottom of the liquid flow groove 24. A pair of groove walls 241, 243 extend upward from both ends of the groove bottom 240 in the opposing direction D1. The groove wall 241 is located on the first side portion 201 side, and an upper end 242 of the groove wall 241 is connected to the base portion 23. The groove wall 243 is located on the first side portion 202 side, and an upper end 244 of the groove wall 243 is connected to the tip component portion 25.

[0031] The liquid flow groove 24 extends from one of the pair of second side edges 203, 204 to the other of the pair of second side edges 203, 204, and is formed in the first cover 20 so as to be continuous. More specifically, the groove bottom 240 and the pair of groove walls 241, 243 extend from the second side edge 203 to the second side edge 204, and are formed in the first cover 20 so as to be continuous. That is, the liquid flow groove 24 is formed in the first cover 20 without merging with other liquid flow grooves or branching off into other liquid flow grooves along the way. The extension direction of the liquid flow groove 24 is the opposing direction D2 of the pair of second side edges 203, 204.

[0032] As shown in FIG. 8, the width L1 of the liquid flow groove 24 in the facing direction D1 may be half or more of the interval L2 in the facing direction D1 from the first side edge portion 201 to the first side edge portion 202. That is, the width of the liquid flow groove 24 may be larger than that of the first cover body 20. The width L1 of the liquid flow groove 24 is the interval from the upper end 242 of the groove wall portion 241 to the upper end 244 of the groove wall portion 243 in the facing direction D1. The width L1 can also be said to be the interval from the end of the base portion 23 on the first side edge portion 202 side to the end of the tip component 25 on the first side edge portion 201 side in the facing direction D1. In this embodiment, the width L1 is preferably half or more of the interval L2, but is not limited thereto. As long as the liquid accumulated on the liquid flow groove 24 can be quickly discharged, the width of the liquid flow groove 24 can be appropriately set according to the size of the first cover body 20.

[0033] Angle θ1 between groove bottom 240 and groove wall 241 and angle θ2 between groove bottom 240 and groove wall 243 are substantially the same angle. Angles θ1 and θ2 are obtuse angles. Note that angles θ1 and θ2 may be different angles or may be substantially 90°. A plurality of ribs 29 are formed on the lower surface of first cover 20.

[0034] As shown in FIG. 7, a support portion 27 for supporting the upper folding container 100 of the stack may be formed on the upper surface of the first lid body 20. The support portion 27 protrudes upward from the upper surface of the first lid body 20. A part of the support portion 27 protrudes upward from the groove wall portion 241 and the groove bottom portion 240 that configure the liquid flow groove 24. The support portion 27 is located on each short side portion of the upper frame portion 14 when the first lid body 20 is located in the closed position. A plurality of support portions 27 are formed, and each is formed in the vicinity of a pair of second side portions 203, 204. Note that only one support portion 27 may be formed on the first lid body 20.

[0035] A restricting protrusion 28 capable of restricting the displacement of the upper folding container 100 of the stack may be formed on the upper surface of the first lid body 20. More specifically, the restricting protrusion 28 protrudes upward from the groove bottom 240 of the liquid flow groove 24. A plurality of restricting protrusions 28 are formed, each of which is formed in the vicinity of the second side edge portions 203 and 204. The restricting protrusions 28 are formed at positions where they can abut against the lower frame portion 111 of the upper folding container 100 in the stacked state. The restricting protrusions 28 restrict the horizontal displacement of the upper folding container 100 by abutting against the lower frame portion 111 of the upper folding container 100 of the stacked state. Note that, when the first lid body 20 is positioned in the closed position, the upper frame restricting protrusion 143 is adapted to fit into the inner peripheral portion of the restricting protrusion 28. That is, the regulating protrusion 28 is formed on the first cover 20 so as to correspond to the formation position of the upper frame regulating protrusion 143 when the first cover 20 is in the closed position. The regulating protrusion 28 may extend upward from at least a part of the formation range of the liquid flow groove 24. The regulating protrusion 28 may be formed outside the formation range of the liquid flow groove 24 on the upper surface of the first cover 20.

[0036] The tip constituent portion 25 is inclined downward from the upper end 244 of the groove wall portion 243 toward the first side edge portion 202. That is, the upper surface of the tip constituent portion 25 is an inclined surface that inclines downward from the upper end 244 of the groove wall portion 243 toward the first side edge portion 202. In the up-down direction, the first side edge portion 202 is located lower than the upper end 244 of the groove wall portion 243. Note that the tip constituent portion 25 only needs to have at least a portion of an inclined surface that inclines downward from the first side edge portion 201 toward the first side edge portion 202 so that the first side edge portion 202 is located lower than the upper end 244 of the groove wall portion 243.

[0037] 9, when the first cover body 20 and the second cover body 21 are in the closed position, the tip constituent parts 25 of the first cover body 20 and the second cover body 21 overlap each other in the vertical direction. The tip constituent parts 25 of the first cover body 20 and the second cover body 21 overlap each other in the vertical direction includes at least a part of the tip constituent part 25 of the first cover body 20 and at least a part of the tip constituent part 25 of the second cover body 21 overlapping each other in the vertical direction.

[0038] The tip constituent portion 25 of the first lid body 20 is inclined so that the first side edge portion 202 of the first lid body 20 is lower than the upper end 244 of the groove wall portion 243. In addition, the tip constituent portion 25 of the second lid body 21 is inclined so that the first side edge portion 212 of the second lid body 21 is lower than the upper end 244 of the groove wall portion 243.

[0039] When the lid body 2 of the folding container 100 is in the closed position, liquid may accumulate on the upper surface of the lid body 2. For example, when the folding container 100 is washed with the lid body 2 closed or when it is placed outdoors, cleaning liquid or rainwater may accumulate on the lid body 2. In such a case, the liquid on the lid body 2 is drained by an operator. The liquid on the lid body 2 can be drained by turning the folding container 100 upside down, but this requires the action of turning the folding container 100 upside down, which is time-consuming to drain the liquid on the lid body 2. Furthermore, if the folding container 100 is somewhat heavy or of a certain size, it may be difficult to turn it upside down.

[0040] According to the above-mentioned lid body 2, a series of liquid flow grooves 24 is formed, so that by tilting the lid body 2 in the direction in which the liquid flow grooves 24 extend (opposing direction D2), the liquid in the liquid flow grooves 24 flows along the liquid flow grooves 24 and is discharged to the outside of the lid body 2. Therefore, since the liquid flowing in the liquid flow grooves 24 flows into other liquid flow grooves, it is not necessary to drain the liquid on the lid body 2 by tilting in the extension direction of the other liquid flow grooves. This allows the liquid on the lid body 2 to be quickly discharged.

[0041] For example, in the folded state, a worker can easily drain liquid on the lid body 2 to the outside by simply holding the folding container 100 in the folded state with both hands and tilting it in the facing direction D2. Also, in the assembled state, a worker can drain liquid on the lid body 2 by tilting the assembled folding container 100 in the facing direction D2. Therefore, liquid on the lid body 2 can be drained regardless of the folded state or assembled state, and liquid on the lid body 2 can be easily drained even if the folding container 100 has a certain weight or size.

[0042] Furthermore, with a configuration in which the width L1 is equal to or greater than half the distance L2, the liquid flow grooves 24 are formed in most of the first cover 20. This makes it easier for most of the liquid on the first cover 20 to be discharged along the liquid flow grooves 24. This improves the efficiency with which the liquid on the first cover 20 is discharged.

[0043] Furthermore, by extending the liquid flow groove 24 in the opposing direction D2, when discharging the liquid on the first lid body 20, the first lid body 20 is tilted in the opposing direction D2, and the liquid in the liquid flow groove 24 can flow in the opposing direction D2. That is, the liquid in the liquid flow groove 24 does not flow toward the first side edge portion 201 side or the first side edge portion 202 side of the first lid body 20. This makes it difficult for the liquid in the liquid flow groove 24 of the first lid body 20 to enter the inside of the container body 1 through a gap formed between the tip constituent portion 25 of the first lid body 20 and the tip constituent portion 25 of the second lid body 21.

[0044] In addition, by inclining the tip constituent part 25, when the first lid body 20 is positioned in the closed position, the position of the first side edge part 202 of the first lid body 20 can be positioned lower than when the tip constituent part 25 is not inclined. Therefore, when the first lid body 20 and the second lid body 21 are positioned in the closed position, the tip constituent part 25 of the second lid body 21 positioned on the upper side and the tip constituent part 25 of the first lid body 20 positioned on the lower side come into contact with each other, thereby preventing the first side edge part 212 of the second lid body 21 from floating upward. That is, in the vertical direction, the position of the first side edge part 212 of the second lid body 21 can be made lower than the upper end 244 of the groove wall part 243 of the second lid body 21. As a result, when the first lid body 20 and the second lid body 21 are positioned in the closed position, the height of the overlapping part of the tip constituent parts 25 of the first lid body 20 and the second lid body 21 can be lowered. Furthermore, by inclining the tip constituent part 25, it becomes easier to abut the first side edge part 212 of the upper second lid body 21 against the tip constituent part 25 of the lower first lid body 20. This makes it difficult for liquid to enter the inside of the container body 1 through a gap formed between the tip constituent part 25 of the first lid body 20 and the tip constituent part 25 of the second lid body 21.

[0045] [Process of change in state of the foldable container 100] Next, a process of changing the state of the folding container 100 from the assembled state to the folded state will be described. First, the lid body 2 is positioned in the closed position, and the second side wall portion 13 is rotated toward the inside of the folding container 100 with respect to the upper frame portion 14 as shown by the arrow X in FIG. 3. Next, as shown in FIG. 5, the first upper wall portion 121 and the first lower wall portion 122 are rotated toward the inside so that the outer surface of the first lower wall portion 122 and the outer surface of the first upper wall portion 121 are aligned. This causes the folding container 100 to change from the assembled state to the folded state. As shown in FIG. 6, in the folded state, the first side wall portion 12 and the second side wall portion 13 are folded above the bottom wall portion 11 and stored inside the upper frame portion 14.

[0046] [Stacking of Foldable Containers 100] Next, a stacked state in which the folding containers 100 are stacked vertically will be described. As shown in Fig. 10, with the lid 2 in the closed position, the assembled folding containers 100 can be stacked vertically. Note that the folding containers 100 can also be stacked vertically in the folded state. The upper folding container 100 is supported by the lower folding container 100.

[0047] 11 , the support portion 27 formed on the lid body 2 of the lower folding container 100 abuts against the lower surface of the lower frame portion 111 of the bottom wall portion 11 of the upper folding container 100. More specifically, the support portion 27 abuts against a supported portion 113 formed on a short side portion of the lower frame portion 111. The short side side of the upper folding container 100 is supported by the support portion 27. The support portion 27 may abut against the lower surface of the bottom wall portion 11.

[0048] Moreover, the upper surface of the hinge portion 141 formed on the upper frame portion 14 of the lower folding container 100 abuts against the lower surface of the lower frame portion 111 of the bottom wall portion 11 of the upper folding container 100. More specifically, the hinge portion 141 abuts against the lower surface of the long side portion of the lower frame portion 111. The long side of the upper folding container 100 is supported by the hinge portion 141 of the upper frame portion 14. The hinge portion 141 may abut against a rib formed on the long side portion of the lower frame portion 111. Moreover, the hinge portion 141 of the lower folding container 100 can abut against the rib 112 of the bottom wall portion 11 of the upper folding container 100 in the stacked state. The hinge portion 141 of the lower foldable container 100 and the rib 112 of the upper foldable container 100 come into contact with each other, thereby restricting displacement of the upper foldable container 100 in the short side direction.

[0049] In this embodiment, the restricting protrusion 28 formed on the lid body 2 of the lower folding container 100 does not abut against the lower surface of the lower frame part of the upper folding container 100. The restricting protrusion 28 can abut against the rib 112 of the bottom wall part 11 of the upper folding container 100 in the stacked state. The restricting protrusion 28 of the lower folding container 100 abuts against the rib 112 of the upper folding container 100, thereby restricting displacement of the upper folding container 100 in the longitudinal direction. The restricting protrusion 28 may abut against the outer surface of the surrounding wall 114 of the upper folding container 100 in the stack, thereby restricting displacement of the upper folding container 100 in at least one of the longitudinal direction and the lateral direction.

[0050] In order to restrict the displacement of the upper stacked folding container 100 by the upper frame restricting protrusion 143, it is necessary to form an insertion hole in the first cover body 20 through which the upper frame restricting protrusion 143 is inserted when the first cover body 20 is in the closed position. However, by forming the restricting protrusion 28 in the first cover body 20, it is not necessary to form an insertion hole in the first cover body 20 through which the upper frame restricting protrusion 143 is inserted. In other words, liquid on the first cover body 20 does not infiltrate into the container body 1 through the insertion hole formed in the first cover body 20. This makes it possible to restrict the displacement of the folding container 100 while preventing liquid from infiltrating into the container body 1.

[0051] The folding container 100 of this embodiment can also be stacked on top of another folding container 100 with the lid 2 in the maximum open position. In this case, the upper frame restricting protrusion 143 formed on the upper frame portion 14 comes into contact with the rib 112 of the upper folding container 100, restricting longitudinal displacement of the upper folding container 100.

[0052] Other embodiments In the above-described embodiment, the opening 15 of the container body 1 of the folding container 100 is closed by two lid bodies 2 (the first lid body 20 and the second lid body 21), but the present invention is not limited to this configuration. For example, the opening 15 of the container body 1 may be closed by one lid body 2.

[0053] Also, the lid body 2 is provided rotatably relative to the container body 1, but is not limited to this configuration. The lid body 2 may not be rotatable relative to the container body 1. For example, the lid body 2 may be attached to the top of the container body 1 by fitting a fitting portion of the lid body 2 into a fitting portion provided on the top of the container body 1, and the opening 15 may be closed by the lid body 2.

[0054] Furthermore, the lid body 2 of the present invention is provided to the foldable container 100 that can be changed into a folded state, but is not limited to this configuration. For example, the lid body 2 of the present invention may be provided to a container that cannot be folded.

[0055] In addition, when the first lid body 20 and the second lid body 21 are positioned at the closed position, the tip components 25 of the first lid body 20 and the second lid body 21 overlap each other in the vertical direction, but this is not limited to the configuration. When the first lid body 20 and the second lid body 21 are positioned at the closed position, the first side edge portion 202 of the first lid body 20 and the first side edge portion 212 of the second lid body 21 may face each other. Note that, when the first side edge portion 202 and the first side edge portion 212 face each other, the first side edge portion 202 and the first side edge portion 212 may or may not abut each other in the horizontal direction of the first lid body 20 and the second lid body 21.

[0056] Furthermore, although the folding container 100 includes an upper frame portion 14, the present invention is not limited to this configuration. The folding container 100 does not necessarily have to include an upper frame portion 14. In this case, the first side wall portion 12 and the second side wall portion 13 can be folded above the bottom wall portion 11 by rotating them relative to the bottom wall portion 11, and are stored inside the lower frame portion 111.

[0057] Furthermore, the step 16 between the upper frame 14 and the first side wall 12 forms a recess capable of receiving the restricting protrusion 28 of the lid 2 located at the maximum open position, but the present invention is not limited to this configuration. For example, a groove-shaped recess may be formed on the outer surface of the first side wall 12 in correspondence with the position of the restricting protrusion 28 of the lid 2 located at the maximum open position.

[0058] Moreover, the liquid flow groove 24 is not limited to a configuration including the groove bottom 240 and the groove walls 241, 243. For example, the liquid flow groove 24 may be a groove having a U-shaped or V-shaped cross section. The groove bottom 240 of the liquid flow groove 24 may be inclined so as to descend toward one of the second side edges of the pair of second side edges 203, 204 in the facing direction D2. Moreover, the groove bottom 240 of the liquid flow groove 24 may be inclined so as to descend toward the second side edge 203 side and the second side edge 204 side to the second side edge 204 side, with the middle position in the facing direction D2 as the boundary.

[0059] Also, the angle θ1 may be smaller than the angle θ2. The angle θ1 is preferably close to 90°. By making the angle θ1 smaller than the angle θ2, even if the tip forming parts 25 of the first lid body 20 or the second lid body 21 overlap in the vertical direction and tilt downward toward the lid body shaft part 22, the groove wall part 241 located on the lid body shaft part 22 side blocks the liquid flowing toward the lid body shaft part 22 side. This reduces the risk of liquid entering the inside of the container body 1 through the gap between the lid body shaft part 22 of the first lid body 20 or the second lid body 21 and the hinge part 141 of the container body 1.

[0060] Moreover, although the lid body 2 is configured to include the support portion 27, the present invention is not limited to this configuration. The lid body 2 may be configured not to include the support portion 27. In this case, the restricting protrusion 28 may be configured to come into contact with the upper folding container 100 in the stack.

[0061] [Additional Notes] 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]

[0062] 1 Container body 2 Lid 15 Aperture 22 Lid shaft 24 Liquid flow groove 25 Tip component 28 Regulating protrusion 100 Folding container 201 First side portion (one of the first side portions) 202 first side portion (the other first side portion) 203 Second side portion (one of the second side portions) 204 Second side portion (the other second side portion) 240 Groove bottom 241 Groove wall 243 Groove wall

Claims

1. A lid for closing an opening formed in an upper portion of a container body, a pair of opposing first side portions and a pair of opposing second side portions; A lid body having a series of liquid flow grooves formed on its upper surface, the grooves extending from one of the pair of second side portions to the other of the pair of second side portions.

2. The lid body described in claim 1, wherein the width of the liquid flow groove in the opposing direction of the pair of first side edges is more than half the distance in the opposing direction from one first side edge to the other first side edge of the pair of first side edges.

3. The opening is closed by the two lids, A lid shaft portion is provided on the first side edge portion of each of the lid bodies and is rotatably connected to the container body, The lid body according to claim 2, wherein when each of the lid bodies is in a closed position in which the opening is closed, the other first side edge portions of each of the lid bodies face each other, or tip components located on the other first side edge portions of each of the lid bodies overlap in the vertical direction.

4. the liquid flow groove has a groove bottom portion and a pair of groove wall portions extending upward from both ends of the groove bottom portion in a direction in which the pair of first side edges face each other, The lid body according to claim 3, wherein the tip component of each of the lid bodies has an inclined surface that slopes downward from the first side edge side of one of the lid bodies toward the other first side edge portion so that the other first side edge portion is located lower than the upper end of the groove wall portion located on the other first side edge portion side.

5. the liquid flow groove has a groove bottom portion and a pair of groove wall portions extending upward from both ends of the groove bottom portion in a direction in which the pair of first side edges face each other, The lid body according to claim 3 , wherein an angle formed between the groove bottom and the groove wall portion located on the first side edge side of the one of the grooves is smaller than an angle formed between the groove bottom and the groove wall portion located on the other first side edge side.

6. A container body; A container comprising the lid body according to any one of claims 1 to 5, The container can be stacked in a vertical direction with the lid body in a closed position in which the lid body closes the opening, The lid body is formed with a regulating protrusion that protrudes upward from at least a portion of the area where the liquid flow groove is formed and is capable of regulating displacement of the upper container when the containers are stacked.

7. The container according to claim 6, wherein the container body has a recess that is recessed inwardly of the container body and is capable of receiving the regulating protrusion when the lid body is in a maximum open position, which is the most open position.

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