Palette lid and storage palette

Abstract

To provide a palette lid capable of preventing theft of a cargo stored in a storage palette.SOLUTION: A palette lid 2 is formed as a lid for a storage palette 1 having a hexahedral box-shaped part with an opening formed on a top surface and openings 10 formed on each of the top surfaces S2 of the four corners of the box-shaped part. The palette lid 2 is configured to include: a rectangular, flat lid part 14 that can be placed on the top surface of a box-shaped part to cover the opening; a protrusion 28 formed on each corner of the lid part 14 so that the lid part 14 can be inserted into each opening 10 when placed on the top surface of the box-shaped part; and a locking part for locking the lid part 14 to the storage palette 1.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a pallet lid and a storage pallet. [Background technology]

[0002] Conventionally, for example, a six-sided box-shaped storage pallet with an opening formed on the top surface is known (see, for example, Patent Document 1). The storage pallet described in Patent Document 1 stores cargo inside and can be lifted and transported by a transport device such as a crane. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-219109 Summary of the Invention [Problem to be solved by the invention]

[0004] As a result of research conducted by the inventors of the present invention into such storage pallets, it was found that there was a demand at construction sites and the like to equip storage pallets with anti-theft features (functions to prevent theft of cargo) so that they could be used to manage expensive tools, organic solvents, etc. An object of the present invention is to provide a pallet lid and a storage pallet that can prevent theft of cargo stored in the storage pallet. [Means for solving the problem]

[0005] A pallet lid according to one embodiment of the present invention is a pallet lid for a storage pallet having (a) a hexahedral box-shaped portion with an opening formed on its top surface and openings formed on the top surfaces of each of the four corners of the box-shaped portion, and is equipped with (b) a rectangular, flat lid portion that can be placed on the top surface of the box-shaped portion to cover the openings, (c) protrusions formed on each corner of the lid portion so that they can be inserted into each of the openings when the lid portion is placed on the top surface of the box-shaped portion, and (d) locking portions for locking the lid portion to the storage pallet. A storage pallet according to one aspect of the present invention (a) comprises the above-described pallet lid. [Effects of the Invention]

[0006] According to one aspect of the present invention, an object is to provide a pallet lid and a storage pallet that can prevent theft of cargo inside the storage pallet. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a diagram showing the overall configuration of a pallet lid and a storage pallet according to an embodiment. FIG. [Figure 2] FIG. 2 is a diagram showing the configuration of a storage pallet. [Figure 3] FIG. 10 is a diagram showing the configuration of a pallet lid. [Figure 4] FIG. [Figure 5] FIG. 10 is a view showing a case where only the second cover part is opened. [Figure 6] 4 is a diagram showing a region B of the pallet lid shown in FIG. 3 as viewed obliquely from below. [Figure 7] 2 is an enlarged view of an area A of the pallet lid and storage pallet shown in FIG. 1. FIG. [Figure 8] 10A and 10B are diagrams showing how the distance between the first cover part and the second cover part is expanded and contracted by the hinge. [Figure 9] 4 is a diagram showing the region B of the pallet lid shown in FIG. 3 as viewed from above, with the upper portion of the lid omitted. [Figure 10] FIG. 10 is a diagram showing the case where pallet lids are stacked. [Figure 11] 4 is a diagram showing the region C of the pallet lid shown in FIG. 3 as viewed from the side. FIG. [Figure 12] FIG. 10 is a diagram showing a storage pallet according to a modified example. [Figure 13] FIG. 10 is a diagram showing a pallet lid according to a modified example (1). [Figure 14] FIG. 10 is a diagram showing a pallet lid according to a modified example (2). [Figure 15] FIG. 10 is a diagram showing a hinge according to a modified example (3). DETAILED DESCRIPTION OF THE INVENTION

[0008] An example of a pallet lid according to an embodiment of the present invention will be described below with reference to Figures 1 to 15. The embodiment of the present invention will be described in the following order. Note that the present invention is not limited to the following example. Furthermore, the effects described in this specification are examples and are not limiting, and other effects may also be present. 1. Embodiment: Storage pallet 1-1 Overall structure of storage pallet and pallet lid 1-2 Storage pallet configuration 1-3 Pallet lid configuration 1-4 Actions and Effects 2. Variations

[0009] 1. Embodiment [1-1 Overall structure of storage pallet and pallet lid] A description will now be given of a storage pallet 1 and a pallet lid 2 according to an embodiment of the present invention. FIG. 1 is a diagram showing the overall configuration of the pallet lid 2 and storage pallet 1 according to the embodiment. As shown in FIG. 1, the storage pallet 1 is a lifting pallet on which cargo is stored at a construction site or the like, and which is lifted and transported by a transport device such as a crane. When the storage pallet 1 is lifted and transported, it is covered with the pallet lid 2, and the removal opening 3 (see FIG. 2) on the top surface S1 of the storage pallet 1 is blocked.

[0010] [1-2 Storage Pallet Configuration] As shown in Figure 2, the storage pallet 1 has a hexahedral box-shaped portion 4 with a removal opening 3 formed on the top surface S1. Steel, for example, can be used as the material for the box-shaped portion 4. The box-shaped portion 4 has a loading platform 5, four pillars 6, an opening frame 7, and four side walls 8.

[0011] The loading platform 5 is a member that forms the bottom of the box-shaped portion 4. For example, it is formed in the shape of a rectangular plate, and cargo is loaded on the upper surface. Each side of the loading platform 5 is formed by a long plate-like member 9 that is installed on adjacent pillars 6. Figure 2 shows an example in which the width direction of the plate-like member 9 is oriented parallel to the vertical direction. The bottom surface of the loading platform 5 is formed by a wire mesh made of steel wires arranged in a grid pattern. The pillars 6 are members that form the side edges (the edges where two side surfaces intersect) of the box-shaped portion 4. For example, they are located at each corner of the loading platform 5 and extend upward and downward from the loading platform 5. The pillars 6 are formed as hollow rectangular pillars. The lower portions of the pillars 6 protrude downward from the underside of the loading platform 5 to form the legs of the storage pallet 1. The upper portions of the pillars 6 extend upward so that the top surfaces S2 of the pillars 6 are located above the top surfaces S1 of the box-shaped portion 4. An opening 10 is formed in the top surfaces S2 of the pillars 6. That is, an opening 10 is formed in each of the upper surfaces of the four corners of the box-shaped portion 4. For example, the opening 10 may be a through-hole formed in the center of the top surface S2 that is large enough to insert the protrusion 28 (see FIG. 6) of the pallet lid 2. FIG. 2 illustrates an example in which the protrusions 28 are cylindrical and the openings 10 are circular through-holes.

[0012] Additionally, a rectangular plate-like member 11 with its longitudinal direction oriented parallel to the vertical direction is fixed to the upper side of the side edge of the box-like portion 4 (column portion 6), and an oval ring-like member 12 that is long in the vertical direction is attached so as to be swingable via the plate-like member 11. Figure 2 shows an example in which the round bar that makes up the ring-like member 12 is swingably inserted into a through-hole formed in the plate-like member 11. This allows the box-like portion 4 to be lifted by a transport device such as a crane by hanging a lifting tool such as a hook on the ring-like member 12, making it possible to lift and transport the storage pallet 1. The opening frame 7 is a member that forms the periphery of the extraction opening 3. For example, it is formed of a long plate-like member 13 that is installed between adjacent pillars 6 so as to surround the extraction opening 3 on all four sides. FIG. 2 shows an example in which the width direction of the plate-like member 13 is oriented parallel to the vertical direction. In addition, the upper part of the plate-like member 13 is bent toward the extraction opening 3 side. The side wall portion 8 is a member that forms the side wall of the box-shaped portion 4. For example, it is erected on the periphery of the loading platform 5 so as to cover the area (opening) surrounded by the plate-shaped member 9, the pillar portion 6, and the plate-shaped member 13. FIG. 2 shows an example in which the side wall portion 8 is formed from a wire mesh in which steel wires are arranged in a lattice pattern. With this configuration, the box-shaped portion 4 forms a hexahedron with the removal opening 3 formed on the upper surface S1, and can store cargo at a construction site or the like and can be lifted and transported by a transport device.

[0013] [1-3 Pallet lid configuration] As shown in Figure 3, the pallet lid 2 has a lid portion 14 that forms the lid main body of the pallet lid 2. The lid portion 14 is formed, for example, in the shape of a rectangular flat plate, and can be placed on the upper surface S1 of the box-shaped portion 4 so as to cover the removal opening 3 of the box-shaped portion 4. The size of the lid portion 14 is such that it can cover the removal opening 3 of the box-shaped portion 4 in a plan view. This allows the pallet lid 2 to cover the removal opening 3 on the upper surface S1 of the storage pallet 1, and makes it possible to prevent cargo stored in the storage pallet 1 from being blown away by the wind, for example, when the storage pallet 1 is being lifted and transported. Specifically, the lid portion 14 has a flat first lid portion 15 that covers a portion of the access opening 3 of the box-shaped portion 4, and a flat second lid portion 16 that covers the remaining portion of the access opening 3. FIG. 3 illustrates an example in which the first lid portion 15 and the second lid portion 16 are rectangular plates of the same size that are arranged parallel to each other in the short direction of the lid portion 14. The first lid portion 15 and the second lid portion 16 may be made of a metal such as an aluminum alloy. The first lid portion 15 and the second lid portion 16 are connected via two hinges 17. The hinges 17 are located on the top surface S4 of the lid portion 14 (the first lid portion 15 and the second lid portion 16) at positions that straddle the boundary 18 between the first lid portion 15 and the second lid portion 16. The hinges 17 are located near each end of the boundary 18.

[0014] As shown in FIG. 4 , each hinge 17 has two first wing portions 19 and two second wing portions 20. The first wing portions 19 and the second wing portions 20 are alternately arranged along the boundary 18 between the first cover portion 15 and the second cover portion 16. The first wing portion 19 has a first wing plate 21 fixed to the upper surface S4 of the first cover portion 15, and a first tubular portion 23 formed on the first wing plate 21, the axis of which extends parallel to the boundary 18. That is, the axis of the first tubular portion 23 extends parallel to the end of the first cover portion 15 on the second cover portion 16 side. The first tubular portion 23 is a tubular member formed by bending the tip of the first wing plate 21. An axle 22 is inserted into the first tubular portion 23. In a cross section perpendicular to the axis of the first tubular portion 23, the hole 24 of the first tubular portion 23 has an elongated hole shape extending in a direction parallel to the first lid portion 15. The ratio W1 / H1 of the maximum height H1 to the maximum width W1 of the hole 24 (elongated hole shape) is, for example, 1.5 or more, more preferably 2.0 or more, and even more preferably 2.5 or more. The upper limit of the ratio W1 / H1 is, for example, 5.0, and more preferably 3.0.

[0015] The shaft rod 22 is cylindrical and has an expanded end to prevent it from slipping out. The ratio W1 / Φ of the diameter Φ of the shaft rod 22 (the diameter of the portion inserted into the holes 24 and 27) to the maximum width W1 of the hole 24 is, for example, greater than 1.0 and not greater than 1.1. The second blade portion 20 has a second blade plate 25 fixed to the upper surface S4 of the second cover portion 16, and a second pipe portion 26 formed on the second blade plate 25 and having an axis extending parallel to the boundary 18. That is, the axis of the second pipe portion 26 extends parallel to the end of the second cover portion 16 on the first cover portion 15 side. The second pipe portion 26 is a tubular member formed by bending the tip of the second blade plate 25. The shaft rod 22 is inserted into the second pipe portion 26. In a cross section perpendicular to the axis of the second pipe portion 26, the hole 27 of the second pipe portion 26 has an elongated hole shape extending in a direction parallel to the second cover portion 16. The ratio W2 / H2 of the maximum height H2 to the maximum width W2 of the hole 27 (elongated hole shape) is, for example, 1.5 or more, more preferably 2.0 or more, and even more preferably 2.5 or more. The upper limit of the ratio W2 / H2 is, for example, 5.0, more preferably 3.0. The ratios W1 / H1 and W2 / H2 may be the same or different from each other. A gap is formed between the first pipe portion 23 and the second pipe portion 26, allowing their ends to slide relative to each other while suppressing relative movement therebetween in a direction parallel to the boundary 18. A thrust washer (not shown) may be inserted into this gap to prevent wear between the metals. The hinge 17 (first wing portion 19, second wing portion 20, and shaft 22) may be made of a metal such as stainless steel. With this configuration, the first wing portion 19 and the second wing portion 20 of the hinge 17 can rotate around the axis rod 22. Therefore, as shown in FIG. 5, after the access opening 3 of the storage pallet 1 is covered with the pallet lid 2 (first lid portion 15, second lid portion 16), only one of the first lid portion 15 and the second lid portion 16 can be opened, facilitating the storage and removal of items into the box-shaped portion 4. Furthermore, with the protrusion 28 of one of the first lid portion 15 and the second lid portion 16 inserted into the opening 10 of the pillar portion 6, the other lid portion can be opened. Therefore, because one lid portion is fixed to the pillar portion 6, it is possible to prevent one lid portion from moving when the other lid portion is opened, preventing the pallet lid 2 from shifting, and facilitating the opening and closing of the other lid portion.

[0016] 6 and 7, each corner of the lid portion 14 is formed with a columnar protrusion 28 (broadly speaking, a "protrusion") extending downward so as to be inserted into each opening 10 of the column portion 6 when the lid portion 14 is placed on the upper surface S1 of the box-shaped portion 4. As a result, for example, when covering the storage pallet 1 with the pallet lid 2, by inserting the protrusion 28 of the pallet lid 2 into the opening 10 of the storage pallet 1, it is possible to suppress misalignment between the position of the corner of the pallet lid 2 and the position of the corner of the storage pallet 1, and to prevent misalignment of the pallet lid 2. FIG. 6 is a diagram showing region B of the pallet lid 2 shown in FIG. 3 as viewed obliquely from below. FIG. 7 is an enlarged view of region A of the pallet lid 2 and storage pallet 1 shown in FIG. 1. Specifically, a notch 29 is formed at each corner of the lid 14. As shown in FIGS. 6 and 7, the notch 29 has a square opening so as to accommodate the upper portion of the column 6 when the lid 14 is placed on the upper surface S1 of the box-shaped portion 4. FIGS. 6 and 7 illustrate an example in which the notch 29 is a square opening (notch). A plate-shaped protrusion 30 is formed within the opening of the notch 29 and is arranged parallel to the horizontal direction. The protrusion 30 protrudes into the opening of the notch 29 so as to rest on the top surface S2 of the column 6 when the lid 14 is placed on the upper surface S1 of the box-shaped portion 4. The planar shape of the protrusion 30 is an inverted Y-shape that protrudes from the notched portion of the lid 14 into the opening of the notch 29. The above-mentioned convex portion 28 is formed on the lower surface S3 of the protrusion 30, as shown in FIG. 6. More specifically, as shown in Figure 7, the protrusions 28 are formed in positions that allow them to be inserted into the openings 10 of the pillars 6 when the lid 14 is placed on the upper surface S1 of the box-shaped portion 4. By forming the notches 29 in the corners of the lid 14, for example, even if the pallet lid 2 tries to shift after it has been placed on the storage pallet 1, the side of the pillars 6 will come into contact with the inner surface of the notch 29, more reliably preventing the pallet lid 2 from shifting.

[0017] Here, consider, for example, a case where the pallet lid 2 is an integrated structure that is not divided into the first lid portion 15 and the second lid portion 16. In the case of an integrated structure, if the distance between the openings 10 at the corners of the storage pallet 1 deviates from the design value due to production errors such as variations in quality, it may become impossible to insert the protrusions 28 of the pallet lid 2 into the openings 10 of the storage pallet 1. The variation in the distance between the openings 10 due to production errors is thought to be around 10 mm. However, it is difficult to reduce the variation to less than 10 mm because this would reduce yield. In contrast to this, in the pallet lid 2 according to this embodiment, as described above, the hole 24 of the first pipe portion 23 of the hinge 17 has an elongated hole shape extending in a direction parallel to the first cover portion 15 in a cross section perpendicular to the axis of the first pipe portion 23 (see Figures 4 and 8). Therefore, as shown in Figures 4 and 8, the shaft rod 22 can be slid in the longitudinal direction of the hole 24 within the hole 24 of the first pipe portion 23, the second cover portion 16 can be moved in a direction parallel to the first cover portion 15, and the distance between the convex portion 28 of the first cover portion 15 and the convex portion 28 of the second cover portion 16 (i.e., the distance in the direction perpendicular to the boundary 18) can be expanded or contracted. Therefore, for example, if the distance between the openings 10 at the corners of the storage pallet 1 (i.e., the distance in a direction perpendicular to the boundary 18) deviates from the design value, the distance between the protrusions 28 of the pallet lid 2 can be extended or shortened according to the amount of deviation between the openings 10, making it possible to insert the protrusions 28 of the pallet lid 2 into the openings 10 of the storage pallet 1. In the pallet lid 2 according to this embodiment, the distance between the convex portions 28 of the first lid portion 15 and the distance between the convex portions 28 of the second lid portion 16 (i.e., the distance in the direction parallel to the boundary 18) cannot be adjusted. Therefore, for example, if a misalignment occurs in the distance parallel to the boundary 18 between the openings 10 at the corners of the storage pallet 1, that misalignment may prevent the convex portions 28 of the pallet lid 2 from being inserted into all of the openings 10 of the storage pallet 1. However, with the pallet lid 2 according to this embodiment, the convex portions 28 (the convex portions 28 of the first lid portion 15 and the convex portions 28 of the second lid portion 16) can be inserted into at least two openings 10. By inserting the convex portions 28 into these two openings 10, it is possible to prevent the pallet lid 2 from shifting.

[0018] Furthermore, in a cross section perpendicular to the axis of the second pipe 26, the hole 27 of the second pipe 26 is shaped like an elongated hole extending in a direction parallel to the second cover 16. This allows the shaft 22 to slide in the longitudinal direction of the hole 27 within the hole 27 of the second pipe 26, increasing the amount of expansion and contraction of the distance between the protrusion 28 of the first cover 15 and the protrusion 28 of the second cover 16. This makes it possible to accommodate a larger deviation (deviation from the design value of the distance between the openings 10 at the corners of the storage pallet 1). The extendable width of the distance between the protrusions 28 by the hinge 17 is preferably set to 10 mm or more so as to be able to accommodate variations in the distance between the openings 10 due to manufacturing tolerances. Therefore, the maximum width W1 of the hole 24, the maximum width W2 of the hole 27, and the diameter Φ of the shaft 22 shown in Figure 4 are preferably set so as to satisfy the relationship W1 + W2 - Φ ≥ 10 mm.

[0019] As shown in FIG. 3, a rim frame 31 is formed on the outer periphery of the lid portion 14 along the four sides of the lid portion 14. The rim frame 31 protrudes downward from the four sides of the lid portion 14 so that its lower end (the lower surface S7 of the second rectangular tube portion 34 in FIG. 6) rests on the opening frame 7 (broadly speaking, the "periphery of the removal opening") when the lid portion 14 is placed on the upper surface S1 of the box-shaped portion 4. Specifically, as shown in FIGS. 6, 7, and 9, an integrated part 39 is formed at the base of the protruding portion 30. The integrated part 39 integrally comprises a notch 29 and two grooves 32 along each of the two sides of the lid portion 14 that sandwich the notch 29. FIG. 9 shows the region B of the pallet lid 2 shown in FIG. 3 as viewed from above, with the upper portion of the lid portion 14 omitted. As a result, a pair of grooves 32 is disposed on each side of the lid portion 14. The edge frame portion 31 is configured to have a first rectangular tube portion 33 whose upper portion is fitted into a pair of groove portions 32 and whose lower portion protrudes below the lid portion 14, and a second rectangular tube portion 34 formed on the outer side surface of the lower portion of the first rectangular tube portion 33 (i.e., the portion protruding downward), and whose lower portion protrudes below the lower surface S6 of the first rectangular tube portion 33.

[0020] The lower surface S7 of the second rectangular tube portion 34 is configured to rest on the upper surface of the opening frame portion 7 (i.e., the upper surface S1 of the storage pallet 1). As a result, for example, when the storage pallet 1 is covered with the pallet lid 2, a space surrounded by the edge frame portion 31 and the pallet lid 2 is formed above the access opening 3 of the storage pallet 1. This space allows the storage capacity of the storage pallet 1 to be increased by the amount of the space. Furthermore, as shown in FIG. 10, the inner edge side of the lower surfaces S6 and S7 of the edge frame portion 31 (the lower surface S6 of the first rectangular tube portion 33) is recessed upward relative to the outer edge side of the lower surfaces S6 and S7 (the lower surface S7 of the second rectangular tube portion 34) so as to accommodate the upper portion of another pallet lid 2 when the pallet lid 2 is stacked on top of another pallet lid 2. For example, as shown in FIG. 6, the outer side surface of the lower portion of the first rectangular tube portion 33 protrudes outward relative to the outer side surface of the upper portion, and the second rectangular tube portion 34 is formed on the protruding side surface. As a result, for example, when the pallet lids 2 are stacked, the upper portion of the lid portion 14 including the first rectangular tube portion 33 is surrounded by the lower portion of the second rectangular tube portion 34. As a result, even if the pallet lids 2 try to shift after being stacked, for example, the inner surface of the second rectangular tube portion 34 will come into contact with the outer peripheral surface of the upper part of the lid portion 14, so the pallet lids 2 can be prevented from shifting when stacked and packed.

[0021] The first rectangular tube portion 33 and the second rectangular tube portion 34 are each separated by the boundary 18 between the first lid portion 15 and the second lid portion 16. The edge frame portion 31 may be made of a metal such as an aluminum alloy. Figures 6 and 7 show an example in which the outer edge (periphery) of the edge frame portion 31 is formed larger than the upper surface S1 of the box-shaped portion 4 so that when the lid portion 14 is placed on the upper surface S1 of the box-shaped portion 4 and the protrusion 28 of the pallet lid 2 is inserted into the opening 10 of the storage pallet 1, the outer edge (periphery) of the edge frame portion 31 is formed larger than the upper surface S1 of the box-shaped portion 4 so as to protrude outward beyond the outer periphery of the upper surface S1 (opening frame portion 7) of the box-shaped portion 4.

[0022] Further, downwardly protruding claw portions 35 are formed on the outer edge of the edge frame portion 31. The claw portions 35 protrude downward so that when the lid portion 14 is placed on the upper surface S1 of the box-shaped portion 4, the side surfaces of the claw portions 35 face the outer peripheral surface of the upper part of the box-shaped portion 4. FIG. 6 illustrates an example in which the claw portions 35 are formed by protruding downward from the outer edge side of the lower surface S7 of the second rectangular tube portion 34. That is, when the lid portion 14 is placed on the upper surface S1 of the box-shaped portion 4 and the protrusion portion 28 of the pallet lid 2 is inserted into the opening 10 of the storage pallet 1, the claw portions 35 surround the outer periphery of the upper part of the box-shaped portion 4 on all four sides. As a result, for example, even if the pallet lid 2 attempts to shift after the storage pallet 1 is covered with the pallet lid 2, the side surfaces of the claw portions 35 come into contact with the outer peripheral surface of the upper part of the box-shaped portion 4, thereby more reliably preventing the pallet lid 2 from shifting.

[0023] As shown in FIGS. 3 and 11, each of the four edge frame portions 31 parallel to the boundary 18 between the first and second lid portions 15 and 16 has a locking portion 40 for locking the first and second lid portions 15 and 16 to the storage pallet 1. The locking portion 40 is configured, for example, by fixing both ends of a U-shaped plate member 36 to the edge frame portion 31, and by attaching a vertically elongated square ring-shaped member 37 to the fixed plate member 36 so that it can swing. FIG. 11 is a side view of region C of the lid portion 14 shown in FIG. 3. FIG. 11 illustrates an example in which the round bar constituting the ring-shaped member 37 is inserted into a U-shaped groove formed by the plate member 36. This allows the pallet lid 2 to be fixed to the storage pallet 1 by hanging the ring-shaped member 37 downward and fixing the ring-shaped member 37 to the wire mesh of the side wall portion 8 with a padlock, thereby preventing theft of cargo inside the storage pallet 1.

[0024] 12, consider a case where, of the four side walls 8, side walls (hereinafter also referred to as "specific side walls 41") that are spaced apart and opposed to each other in the short direction of the storage pallet 1 are divided into an upper wall 42 and a lower wall 43, and the upper wall 42 is configured to be tiltable toward the outside of the storage pallet 1 around the lower edge of the upper wall 42. For example, the lower wall 43 is fixed to the pillars 6 and the plate-like member 9, and the lower edge of the upper wall 42 is rotatably attached to the upper edge of the lower wall 43 by a spiral hinge coil 44. Note that, of the four plate-like members 13, the plate-like member 13 located on the side of the specific side wall 41 has its left and right ends detached from the pillars 6 and fixed to the upper wall 42. In FIG. 13, the upper wall 42 further includes locking portions 45 on the left and right sides thereof that can be locked and unlocked to lock the upper wall 42 to the left and right pillars 6 and prevent it from falling over. For example, a plate-like member 47 having a locking hole 46 penetrating in the left-right direction may be formed on the upper side of the pillars 6, and the tip of the locking portion 45 may be formed in a rod shape that can be inserted into and removed from the locking hole 46. In such a configuration, the ring-shaped member 37 of the padlock is fixed to the wire mesh of the upper wall 42. Therefore, by locking the padlock, it is possible to prevent the upper wall 42 from tipping over and also to prevent theft of luggage from the upper wall 42.

[0025] [1-4 Actions and Effects] First, for example, if the storage pallet 1 is new and there is almost no deviation from the design value in the distance between the openings 10 at the corners of the storage pallet 1 due to product errors such as variations in quality, the user can place the pallet lid 2 on the top surface S1 of the storage pallet 1 and insert the convex portions 28 of the pallet lid 2 into the openings 10 of the storage pallet 1. This reduces deviation between the positions of the corners of the pallet lid 2 and the corners of the storage pallet 1, preventing the pallet lid 2 from shifting. Furthermore, for example, if the storage pallet 1 is new but a manufacturing error has caused the distance between the openings 10 at the corners of the storage pallet 1 to deviate from the design value, simply placing the pallet lid 2 on the top surface S1 of the storage pallet 1 will make it impossible to insert the protrusions 28 of the pallet lid 2 into the openings 10 of the storage pallet 1. In this case, the user can insert the protrusions 28 of the pallet lid 2 into the openings 10 of the storage pallet 1 by using the hinge 17 mechanism to expand or contract the distance between the protrusions 28 of the pallet lid 2 (the distance in the direction perpendicular to the boundary 18) in accordance with the amount of deviation between the openings 10.

[0026] Also, consider a case where, when the storage pallet 1 was new, there was almost no misalignment due to product miscalculation, but distortion over many years of use has caused the distance between the openings 10 at the corners of the storage pallet 1 to deviate from the design value. Even in such a case, the user can insert the protrusions 28 of the pallet lid 2 into the openings 10 of the storage pallet 1 by using the hinge 17 mechanism to expand or contract the distance between the protrusions 28 of the pallet lid 2 according to the amount of misalignment between the openings 10. Furthermore, when the pallet lid 2 is in use, if deformation of the storage pallet 1 occurs, the side of the pillar 6 comes into contact with the inner surface of the cutout 29, thereby suppressing deformation of the storage pallet 1. Therefore, the progression of deformation that occurs over many years of use can be suppressed, and distortion of the storage pallet 1 can be suppressed.

[0027] 2. Modifications (1) In the present embodiment, a groove 32 is formed in the lower surface S5 of the lid 14, a portion of the edge frame 31 (first rectangular tube portion 33) is fitted into the groove 32, and the remaining portion of the edge frame 31 (second rectangular tube portion 34) is formed on the lower outer side of the first rectangular tube portion 33. However, other configurations may also be employed. For example, as shown in FIG. 13, a first rectangular tube portion 33 may be formed on each side of the rectangular lid 14, and a second rectangular tube portion 34 may be formed on the lower outer side of the first rectangular tube portion 33, so as to expand the periphery of the lid 14. In this case, the lid 14 and the first rectangular tube portions 33 shown in FIG. 13 constitute the lid 14 shown in FIG. 6, and the right-angled openings formed by the ends of the two first rectangular tube portions 33 at the corners of the lid 14 shown in FIG. 13 constitute the notches 29 shown in FIG. 6. FIG. 13 shows an example in which the first rectangular tube portion 33 and the second rectangular tube portion 34 are connected by a plate-like member.

[0028] (2) Furthermore, in the present embodiment, an example has been shown in which the lid portion 14 has a protrusion 30, a protrusion 28 is formed on the underside of the protrusion 30, and the protrusion 28 is inserted into the opening 10 of the storage pallet 1. However, other configurations may also be employed. For example, as shown in FIG. 14 , a configuration may be adopted in which a rod-shaped member 38 is formed protruding into the opening of the notch 29 so as to protrude above the top surface S2 of the column 6 when the lid portion 14 is placed on the upper surface S1 of the box-shaped portion 4. In this case, the rod-shaped member 38 is bent so that its tip faces downward so that the tip can be inserted into each of the openings 10 of the column 6 when the lid portion 14 is placed on the upper surface S1 of the box-shaped portion 4. As a result, for example, when closing the storage pallet 1 with the pallet lid 2, by inserting the tip of the rod-shaped member 38 into the opening 10 of the storage pallet 1, it is possible to suppress misalignment between the position of the corner of the pallet lid 2 and the position of the corner of the storage pallet 1, and to prevent the pallet lid 2 from shifting.

[0029] (3) Furthermore, in the present embodiment, an example has been shown in which both the hole 24 of the first wing portion 19 and the hole 27 of the second wing portion 20 of the hinge 17 are elongated holes, but other configurations may also be employed. For example, as shown in Fig. 15, one of the hole 24 of the first wing portion 19 and the hole 27 of the second wing portion 20 may be elongated holes and the other may be circular. Fig. 15 illustrates an example in which the hole 24 of the first wing portion 19 is elongated holes and the hole 27 of the second wing portion 20 is circular. (4) In addition, in the present embodiment, an example has been described in which a gap is formed between the first pipe 23 and the second pipe 26, allowing their ends to slide relative to each other while preventing their relative movement in a direction parallel to the boundary 18. However, other configurations may also be employed. For example, a configuration may be adopted in which the gap between the first pipe 23 and the second pipe 26 is made larger so as to allow relative movement between the first pipe 23 and the second pipe 26 in a direction parallel to the boundary 18. The size of this gap may be, for example, 2 mm or more, more preferably 5 mm or more. This allows the first cover 15 and the second cover 16 to move relative to each other in a direction parallel to the boundary 18. Therefore, for example, even if the storage pallet 1 becomes distorted into a parallelogram shape in a plan view due to long-term use, the first cover 15 and the second cover 16 can be moved relative to each other in accordance with the amount of distortion, allowing the protrusion 28 of the pallet lid 2 to be inserted into the opening 10 of the storage pallet 1.

[0030] (5) Furthermore, in this embodiment, the first lid portion 15 and the second lid portion 16 are rectangular and of the same size, but other configurations may be adopted. For example, one of the first lid portion 15 and the second lid portion 16 may be larger and the other smaller. For example, the first lid portion 15 may be a larger rectangular portion, and the second lid portion 16 may be a smaller rectangular portion than the first lid portion 15. Furthermore, the planar shapes of the first lid portion 15 and the second lid portion 16 are not limited to rectangular, and may be trapezoidal, triangular, or the like. [Explanation of symbols]

[0031] 1...storage pallet, 2...pallet lid, 3...removal opening, 4...box-shaped portion, 5...loading platform, 6...pillar portion, 7...opening frame portion, 8...side wall portion, 9...plate-shaped member, 10...opening, 11...plate-shaped member, 12...ring-shaped member, 13...plate-shaped member, 14...lid portion, 15...first lid portion, 16...second lid portion, 17...hinge 17...boundary, 19...first wing portion, 20... Second blade portion, 21...first blade plate, 22...axial rod, 23...first tube portion, 24...hole, 25...second blade plate, 26...second tube portion, 27...hole, 28...convex portion, 29...notch portion, 30...extending portion, 31...rim portion, 32...groove portion, 33...first rectangular tube portion, 34...second rectangular tube portion, 35...claw portion, 36...plate-shaped member, 37...ring-shaped member, 38...rod-shaped member

Claims

1. A pallet lid for a storage pallet having a hexahedral box-shaped portion with a removal opening formed on the top surface thereof, and openings formed on the top surfaces of the four corners of the box-shaped portion, a rectangular flat plate-shaped lid portion that can be placed on the top surface of the box-shaped portion so as to cover the removal opening; protrusions formed on each corner of the lid portion so as to be inserted into each of the openings when the lid portion is placed on the top surface of the box-shaped portion; and a locking portion for locking the lid portion to the storage pallet. Pallet lid.

2. The storage pallet has pillars that form side edges of the box-shaped portion, an upper portion of the column portion extends upward so that a top surface thereof is located above an upper surface of the box-shaped portion, and the opening is formed in each of the top surfaces; The lid portion has a notch formed at each of the four corners of the lid portion, The notch is opened to accommodate the upper part of the column when the lid is placed on the top surface of the box-shaped part.

10. The pallet lid of claim 1.

3. A rim portion is formed on the outer periphery of the lid portion along the four sides of the lid portion, The edge frame portion protrudes downward beyond the four sides of the lid portion so that the lower surface of the edge frame portion rests on the peripheral edge of the removal opening when the lid portion is placed on the upper surface of the box-shaped portion.

3. A pallet lid according to claim 2.

4. A claw portion protruding downward is formed on the outer edge of the edge frame portion, The claws protrude downward so that, when the lid is placed on the top surface of the box-shaped portion, the side surfaces of the claws face the outer peripheral surface of the top of the box-shaped portion.

4. A pallet lid according to claim 3.

5. The inner edge of the lower surface of the edge frame is recessed higher than the outer edge of the lower surface so as to accommodate the top of another pallet lid when the pallet lid is stacked on top of the other pallet lid.

4. A pallet lid according to claim 3.

6. the lid portion includes a protruding portion that protrudes into the opening of the notch so as to rest on the top surface when the lid portion is placed on the upper surface of the box-shaped portion, The protrusion is a columnar projection formed on the underside of the overhang and extending downward.

3. A pallet lid according to claim 2.

7. the protruding portion is a rod-shaped member protruding into the opening of the notch so as to be positioned above the top surface when the lid portion is placed on the upper surface of the box-shaped portion, The rod-shaped member is bent so that the tip thereof faces downward.

3. A pallet lid according to claim 2.

8. the lid portion includes a flat first lid portion that covers a portion of the removal opening, and a flat second lid portion that covers the remaining portion of the removal opening and is connected to the first lid portion via a hinge; The hinge comprises a first blade fixed to the first cover portion, a first blade portion having a first tubular portion formed on the first blade portion and having an axis extending parallel to the boundary between the first cover portion and the second cover portion, a second blade portion fixed to the second cover portion, a second blade portion having a second tubular portion formed on the second blade portion and having an axis extending parallel to the boundary, and a shaft center rod inserted into the first tubular portion and the second tubular portion, and the first blade portion and the second blade portion are rotatable around the shaft center rod, In a cross section perpendicular to the axis of the first pipe portion, the hole of the first pipe portion has an elongated hole shape extending in a direction parallel to the first lid portion.

10. The pallet lid of claim 1.

9. In a cross section perpendicular to the axis of the second pipe portion, the hole of the second pipe portion has an elongated hole shape extending in a direction parallel to the second cover portion.

9. A pallet lid according to claim 8.

10. The first lid portion and the second lid portion are rectangular plate-shaped and arranged in parallel to each other, When the protrusion of one of the first and second lids is inserted into the opening of the column, the other lid can be opened.

9. A pallet lid according to claim 8.

11. A pallet lid according to any one of claims 1 to 10. Storage pallet.

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