Combined cargo tray

Abstract

The utility model relates to the technical field of logistics transportation pallets, in particular to a combined cargo pallet. Comprising a supporting leg and an upper cross beam connected to the upper end of the supporting leg, the supporting leg is of a hollow structure formed through blow molding, and the supporting leg is in an S-shaped folded plate shape in the length direction; the upper ends of the supporting legs are provided with upper cross beam mounting grooves, the upper cross beams are clamped in the upper cross beam mounting grooves, the lower ends of the supporting legs are provided with lower cross beam mounting grooves, and lower cross beams are mounted in the lower cross beam mounting grooves; the more than two supporting legs are arranged at intervals, and the plurality of upper cross beams are arranged at intervals and are bridged among the more than two supporting legs. The upper cross beam can be a wood plate, a wood-plastic composite plate and other materials which have certain strength and are easy to cut and dig holes, or a frame structure made of stainless steel, aluminum alloy and other materials. The combined cargo tray has the advantages of a blow-molded plastic tray, a wood tray and a metal tray, and is firm in structure, good in stability, convenient to disassemble and assemble and reliable to use.

Description

Technical Field

[0001] The utility model relates to the technical field of logistics transport pallets, and more specifically, to a combined cargo pallet. Background Art

[0002] Pallets for logistics transportation or storage are often used as load-bearing containers. In order to facilitate the overall access and handling of forklifts, an overhead support structure will be set under the tray. Early pallets were made of wooden strips and nails. Such wooden pallets are not fireproof, easily bitten by insects and corroded by rainwater, have poor strength, and have a short service life. In order to overcome the shortcomings of wooden pallets, plastic pallets came into being. Plastic pallets are better than wooden pallets in corrosion resistance, waterproofness, and fire resistance, and their service life is extended. Existing plastic pallets are all integrally formed by injection molding, and the panel and the bottom support legs are an integrated structure. The molds used in production are large and the mold cost is high; in addition, the structure of the injection-molded pallet can only be a solid body, which requires a lot of materials and has high material costs, and the toughness of the tray body and materials is inferior to that of blow-molded products. Therefore, in terms of corrosion resistance, impact resistance and service life, plastic pallets are better than wooden pallets; from the perspective of material toughness and material cost control, pallets manufactured by blow molding have certain advantages over injection-molded pallets. But on the other hand, the overall area of ​​the pallet is large. If a pallet with a large-area cavity structure is produced by blow molding, it is easy to cause its compressive strength to be insufficient due to the lack of support inside the cavity. For example, the legs of the pallet bear most of the pressure. Simply increasing the thickness of the blow-molded legs will not only increase the production cost, but also make it difficult to meet the requirements of compressive strength. In addition, the structure of the pallet with an integrated structure is too complicated for the blow molding process, and it is difficult to achieve actual production applications. Another Chinese patent application number 2022221269484 of the inventor discloses a "blow-molded bent leg pallet", and the announcement number is CN218142813U, including a panel and a leg arranged under the panel, the panel includes more than two plates arranged in parallel, and a rectangular positioning bayonet is provided on the side of the plate; there are at least two legs and they are connected to the bottom of the plate through a pin shaft and an axial hole, and the legs are S-shaped folded plates in the length direction; a positioning block matching the positioning bayonet is provided on the upper end surface of the leg, and the positioning block is correspondingly mounted in the positioning bayonet; the plate and the leg of the blow-molded bent leg pallet are both hollow structures formed by blow molding. It has high compressive strength and can meet the requirements of the logistics and transportation industry. However, compared with wooden pallets, this all-plastic pallet is still relatively expensive. It is found in actual use that the pallet's legs are usually in direct contact with the ground in the use environment. Therefore, the improvement in corrosion resistance is mainly reflected in the pallet legs. If low-cost materials are used to design the pallet panel into a detachable and replaceable structure, the cost of production and use can be reduced. Another Chinese patent application No. 2024200512988 of the applicant provides a "combined pallet", including legs and beams connected to the upper ends of the legs, the legs are hollow structures formed by blow molding, and the legs are S-shaped folded plates in the length direction; the upper ends of the legs are provided with through holes, and the beams are inserted into the through holes; two or more legs are connected to multiple beams to form a rectangular frame structure.This combined pallet has the advantages of both blow-molded plastic pallets and wooden pallets, and reduces production and use costs while meeting the requirements of corrosion resistance and compressive and impact strength. However, this combined pallet has a certain thickness in the upper hole wall of the through hole for installing the crossbeam. In actual use, this upper hole wall is placed between the goods and the crossbeam and is subject to greater pressure, making it easy to be crushed. If the thickness of the upper hole wall is reduced, the strength of the hole wall will be insufficient, affecting the connection of the crossbeam, or the through hole will be damaged when the crossbeam is installed, making the entire support leg scrapped. In addition, after the crossbeam is inserted into the through hole, it is necessary to insert a buckle to position the crossbeam. These buckles are easy to detach and fall off when transporting goods, and its reliability of use is somewhat lacking. Summary of the invention

[0003] The utility model aims to provide a combined cargo pallet which has a firm structure, is convenient for assembly and disassembly, and is reliable in use, under the premise of satisfying the requirements of corrosion resistance, compression resistance, and impact resistance.

[0004] The technical solution adopted by the utility model to solve the technical problem is:

[0005] The utility model discloses a modular cargo pallet, comprising supporting legs and an upper crossbeam connected to the upper ends of the supporting legs, wherein the supporting legs are hollow structures formed by blow molding, and are in an S-shaped folded plate shape in the length direction; an upper crossbeam mounting groove is provided at the upper end of the supporting legs, and the upper crossbeam is clamped in the upper crossbeam mounting groove; a lower crossbeam mounting groove is provided at the lower end of the supporting legs, and a lower crossbeam is installed in the lower crossbeam mounting groove; more than two supporting legs are arranged at intervals, and a plurality of upper crossbeams are arranged at intervals and straddled between the more than two supporting legs.

[0006] Through this solution, the S-shaped folded plate-shaped support foot has a strong bearing capacity, and the support foot, the upper beam and the lower beam together form a stable frame structure with strong pressure resistance and impact resistance, and the installation groove type connection structure is convenient for disassembly and assembly.

[0007] Preferably, the upper crossbeam and the lower crossbeam are both plate-like structures with rectangular cross-sections, the upper crossbeam mounting groove is a U-shaped deep groove whose width is adapted to the thickness of the upper crossbeam and whose depth is adapted to the width of the upper crossbeam, a locking pin column is provided on the inner side wall of the upper crossbeam mounting groove, and a locking pin hole is provided on the upper crossbeam at a position corresponding to the locking pin column; the lower crossbeam mounting groove is a U-shaped shallow groove whose width is adapted to the width of the lower crossbeam and whose depth is adapted to the thickness of the lower crossbeam, a connecting column is provided at the bottom of the lower crossbeam mounting groove, and a connecting column hole is provided on the lower crossbeam at a position corresponding to the connecting column.

[0008] Through this solution, the vertically installed upper beam can withstand greater longitudinal pressure, the horizontally installed lower beam can withstand greater horizontal torsional force, and the installation of the locking pin and the connecting column prevents parts from falling off easily, thereby improving the reliability of use.

[0009] Preferably, a connecting pipe communicating with the inner cavity of the supporting leg is provided on a side wall at one end, and an end plate is provided at the end of the connecting pipe.

[0010] According to the solution, the connecting tube can be cut open when needed, and the supporting object can be filled into the inner cavity of the supporting leg through the connecting tube, so as to further improve the strength of the supporting leg.

[0011] Preferably, a longitudinal beam mounting hole is arranged on a side wall at one end of the supporting leg, a longitudinal beam located in an inner cavity of the supporting leg is installed in the longitudinal beam mounting hole, and the longitudinal beam is arranged perpendicular to the cross beam.

[0012] Through this solution, the longitudinal beam can greatly improve the strength and compression resistance of the support leg.

[0013] Preferably, a panel is fixedly mounted on the upper end of the supporting leg, and the panel is glued to the upper crossbeam through a connecting piece or by gluing.

[0014] Through this solution, the upper surface of the tray is flat and has no holes.

[0015] Preferably, the locking pin column is a hemispherical body that is an integrated structure with the inner side wall of the upper beam mounting groove.

[0016] Through this solution, the upper crossbeam is firmly installed and easy to disassemble.

[0017] Preferably, the locking pin column is a cylindrical body that is an integrated structure with the inner side wall of the upper beam mounting groove, and the end face of the cylindrical body is an inclined slope.

[0018] Through this solution, the upper crossbeam is firmly installed and easy to disassemble.

[0019] Preferably, the connecting column is a cylindrical structure with a hemisphere at the end, and the connecting column is an integrated structure with the bottom of the lower cross beam mounting groove.

[0020] Through this solution, the lower cross beam is firmly installed and easy to disassemble.

[0021] Preferably, the upper crossbeam is a plate-like structure with a rectangular cross-section, the upper crossbeam mounting groove is a U-shaped deep groove whose width is adapted to the thickness of the upper crossbeam and whose depth is adapted to the width of the upper crossbeam, a locking pin column is provided on the inner side wall of the upper crossbeam mounting groove, and a locking pin hole is provided on the upper crossbeam at a position corresponding to the locking pin column; a crossbeam connecting plate is fixedly connected to the end of the upper crossbeam, and the crossbeam connecting plate is vertically arranged to the upper crossbeam and connects two or more adjacent upper crossbeams.

[0022] Through this solution, the beam connecting plate connects more than two upper beams to form a solid frame structure, which is beneficial to improving the stability of the pallet.

[0023] Due to the adoption of the above structure, the combined cargo pallet has the advantages of both the blow-molded plastic pallet and the wooden pallet, and has a firm structure, good stability, convenient assembly and disassembly, and reliable use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0025] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the present utility model.

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of the end of the support leg.

[0027] Figure 3 It is a schematic diagram of the three-dimensional structure of the end of the support leg of another embodiment.

[0028] Figure 4 It is a schematic diagram of the three-dimensional structure of the upper beam.

[0029] Figure 5 It is a three-dimensional structural schematic diagram of another embodiment of the utility model. DETAILED DESCRIPTION

[0030] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0031] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0032] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0033] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0034] like Figure 1 , Figure 2As shown, in this embodiment, a combined pallet includes a support leg 1 and a crossbeam 2 connected to the upper end of the support leg 1. The support leg 1 is a hollow structure formed by blow molding, and the support leg 1 is in an S-shaped folded plate shape in the length direction; the upper end of the support leg 1 is provided with an upper crossbeam mounting groove 21, and the upper crossbeam 2 is clamped in the upper crossbeam mounting groove 21, and the lower end of the support leg 1 is provided with a lower crossbeam mounting groove 31, and the lower crossbeam 3 is installed in the lower crossbeam mounting groove 31; the upper crossbeam 2 and the lower crossbeam 3 are both made of multi-layer composite wood boards with a rectangular cross-section plate structure, which is convenient to process, cheap, and can be drilled and nailed using woodworking tools. More than two support legs 1 are arranged at intervals. According to the design width of the pallet and the design load-bearing requirements, 2-5 support legs 1 can be arranged parallel to each other or symmetrically, and multiple upper crossbeams 2 are arranged at intervals and straddled between more than two support legs 1. The number of upper crossbeams 2 and lower crossbeams 3 can also be set to 3-8 as required.

[0035] The upper crossbeam 2 and the lower crossbeam 3 are both plate-like structures with rectangular cross-sections, and can be made of wood boards or wood-plastic composite boards and other materials with certain strength and easy to cut and dig holes. The upper crossbeam 2 and the lower crossbeam 3 use the same length, width and height specifications to facilitate unified processing. The upper crossbeam installation groove 21 is a U-shaped deep groove whose width is adapted to the thickness of the upper crossbeam 2 and whose depth is adapted to the width of the upper crossbeam 2. After assembly, the vertical setting of the width direction of the upper crossbeam can withstand greater pressure; a locking pin column 22 is provided on the inner side wall of the upper crossbeam installation groove 21, and a locking pin hole 23 is provided on the upper crossbeam 2 at a position corresponding to the locking pin column 22. Figure 2 , Figure 3 As shown, after the upper crossbeam 2 is installed in the upper crossbeam installation groove 21, the lock pin column 22 is correspondingly inserted into the lock pin hole of the upper crossbeam 2 to fix the position of the upper crossbeam and prevent the upper crossbeam from falling off from the upper crossbeam installation groove 21. The lock pin column 22 can be a hemispherical body with an integrated structure with the inner side wall of the upper crossbeam installation groove 21, or it can be as shown in FIG. Figure 2 As shown, the locking pin column 22 is a cylinder with an integrated structure with the inner side wall of the upper beam mounting groove 21, and the end face of the cylinder is an inclined slope. Since the support leg 1 adopts a hollow structure formed by blow molding, the inner side wall of the upper beam mounting groove 21 has a certain elasticity. When the upper beam 2 is installed downward from the notch of the upper beam mounting groove 21, the side wall of the upper beam 2 squeezes the inclined surface of the hemisphere or cylinder at the top of the locking pin column 22, causing the locking pin column 22 to retreat slightly backward. After the upper beam 2 is installed in place, the locking pin column 22 is aligned with the locking pin hole, and the locking pin column 22 naturally resets and snaps into the locking pin hole to lock the upper beam 2. A group of locking pin columns 22 can be set on each of the left and right inner side walls of the upper beam mounting groove 21, and a group of locking pin holes can be set on the front and back sides of the upper beam correspondingly, or as shown in the example. Figure 4As shown, a locking pin hole 23 penetrating the upper beam body is provided on the upper beam, and the locking pin hole 23 penetrating the upper beam body is used by two groups of locking pin columns 22 at the same time; of course, one group of locking pin columns 22 can also be provided on only one inner side wall of the upper beam mounting groove 21.

[0036] The lower crossbeam installation groove 31 is a U-shaped shallow groove whose width is adapted to the width of the lower crossbeam 3 and whose depth is adapted to the thickness of the lower crossbeam 3. A connecting column 32 is arranged at the bottom of the groove of the lower crossbeam installation groove 31. The connecting column 32 is a cylindrical structure, and an annular groove is arranged on the outer wall of the connecting column 32. A connecting column hole is arranged on the lower crossbeam 3 at a position corresponding to the connecting column 32. After the connecting column 32 is inserted into the connecting column hole, the annular groove on the connecting column 32 and the inner wall of the connecting column hole of the wooden material are engaged with each other, thereby increasing the friction force and preventing the connecting column 32 from falling off. The connecting column 32 is a cylindrical structure with a hemisphere at the end, and the connecting column 32 is an integrated structure with the bottom of the groove of the lower crossbeam installation groove 31. The structure of the lower crossbeam 3 is the same as that of the upper crossbeam 2, and the position and diameter of the connecting column hole are the same as those of the lock pin hole 23. The specifications and dimensions of the lower crossbeam 3 and the upper crossbeam 2 are the same, which is convenient for production and processing and can be replaced with each other during use, thereby reducing the use and maintenance costs.

[0037] In addition, in order to further improve the strength and compression resistance of the support leg 1, as Figure 3 As shown, a connecting tube 11 is provided on the side wall of one end of the support leg 1 to communicate with the inner cavity thereof, and an end plate 12 is provided at the end of the connecting tube 11. The connecting tube 11 and the end plate 12 are also blow-molded structures integrated with other parts of the support leg 1. The end plate 12 closes the end of the connecting tube 11, so that the inner cavity of the support leg 1 forms a closed space, and the shorter connecting tube 11 forms a neck between the end plate 12 and the body of the support leg 1. When the strength of the support leg 1 needs to be strengthened, the end plate 12 can be cut off to form an opening at the end of the connecting tube 11, so as to form a structure as shown in FIG. Figure 4 As shown, a thinner longitudinal beam 6 can be inserted into the inner cavity of the support leg 1 through the end opening of the connecting tube 11. The width and thickness of the longitudinal beam 6 can just fit into the inner cavity of the support leg 1, which can effectively improve the pressure resistance of the support leg 1.

[0038] Of course, the longitudinal beam 6 can also be directly installed in the inner cavity of the support leg 1. A longitudinal beam installation hole is provided on the side wall of one end of the support leg 1. The longitudinal beam 6 located in the inner cavity of the support leg 1 is installed in the longitudinal beam installation hole. The longitudinal beam 6 is arranged perpendicular to the cross beam 2.

[0039] In addition, as another embodiment of the utility model, a panel 8 is fixedly mounted on the upper end of the support leg 1, and the panel 8 is attached to the upper beam 2 by a connector or glue. After laying the panel 8, the upper surface of the pallet is flat and has no holes, which is more convenient for stacking goods.

[0040] When in use, assemble the support legs 1, the upper crossbeam 2 and the lower crossbeam 3 correspondingly to form a complete pallet. The pallet is placed on the ground and the goods are stacked on top of the pallet. When transporting by forklift, insert the fork rod along the direction of the support leg 1 into the gap between the bottom of the upper crossbeam 2, the top of the lower crossbeam 3 and the support legs 1. Start the forklift to lift the pallet and the goods off the ground for transportation. After transporting to the destination, lower the height of the fork rod until the support leg 1 touches the ground, and finally reverse the vehicle to pull out the fork rod.

[0041] like Figure 5 As shown, as another embodiment of the utility model, a support leg 1 with the same structure as the above embodiment is used, and the upper crossbeam 2 is made of strong and corrosion-resistant stainless steel, aluminum alloy and other materials, and the upper crossbeam 2 is a plate-like structure with a rectangular cross section. The upper crossbeam mounting groove 21 of the support leg 1 is a U-shaped deep groove whose width is adapted to the thickness of the upper crossbeam 2 and whose depth is adapted to the width of the upper crossbeam 2. A lock pin column 22 is provided on the inner side wall of the upper crossbeam mounting groove 21, and a lock pin hole is provided on the upper crossbeam 2 at a position corresponding to the lock pin column 22; the end of the upper crossbeam 2 is fixedly connected with a crossbeam connecting plate 29, and the crossbeam connecting plate 29 is vertically arranged with the upper crossbeam 2 and connects two or more adjacent upper crossbeams 2. Both ends of the upper crossbeam 2 are fixedly connected with the crossbeam connecting plate 29. If two upper crossbeams 2 are connected at the same time, the upper crossbeam 2 and the crossbeam connecting plate 29 form a square frame structure, and if three upper crossbeams 2 are connected at the same time, the upper crossbeam 2 and the crossbeam connecting plate 29 form a day-shaped frame structure. In this way, the frame structure formed by the upper crossbeam 2 and the crossbeam connecting plate 29 has a relatively large strength, which is conducive to keeping the pallet stable and not deformed. Of course, in this embodiment, the lower end of the support leg 1 can be provided with a lower crossbeam 3 as in the above embodiment, or it can be provided without the lower crossbeam 3.

[0042] Although some specific embodiments of the present invention have been described in detail above through specific embodiments, those skilled in the art should understand that the above examples are only for illustration and are not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of protection of the present invention is defined by the appended claims.

Claims

1. A modular cargo pallet, comprising a support leg (1) and an upper crossbeam (2) connected to the upper end of the support leg (1), characterized in that: The support leg (1) is a hollow structure formed by blow molding, and the support leg (1) is in an S-shaped folded plate shape in the length direction; an upper crossbeam mounting groove (21) is provided at the upper end of the support leg (1), and the upper crossbeam (2) is clamped in the upper crossbeam mounting groove (21); more than two support legs (1) are arranged at intervals, and a plurality of upper crossbeams (2) are arranged at intervals and straddled between more than two support legs (1).

2. A combined cargo pallet according to claim 1, characterized in that: A lower crossbeam installation groove (31) is provided at the lower end of the support foot (1), and a lower crossbeam (3) is installed in the lower crossbeam installation groove (31).

3. A combined cargo pallet according to claim 2, characterized in that: The upper crossbeam (2) and the lower crossbeam (3) are both plate-like structures with rectangular cross-sections; the upper crossbeam mounting groove (21) is a U-shaped deep groove whose width is adapted to the thickness of the upper crossbeam (2) and whose depth is adapted to the width of the upper crossbeam (2); a locking pin column (22) is arranged on the inner side wall of the upper crossbeam mounting groove (21); a locking pin hole is arranged on the upper crossbeam (2) at a position corresponding to the locking pin column (22); the lower crossbeam mounting groove (31) is a U-shaped shallow groove whose width is adapted to the width of the lower crossbeam (3) and whose depth is adapted to the thickness of the lower crossbeam (3); a connecting column (32) is arranged at the bottom of the lower crossbeam mounting groove (31), and a connecting column hole is arranged on the lower crossbeam (3) at a position corresponding to the connecting column (32).

4. A modular cargo pallet according to claim 1, 2 or 3, characterized in that: A connecting pipe (11) communicating with the inner cavity of the supporting leg (1) is arranged on a side wall at one end thereof, and an end plate (12) is arranged at the end of the connecting pipe (11).

5. A modular cargo pallet according to claim 1, 2 or 3, characterized in that: A longitudinal beam mounting hole is provided on a side wall at one end of the support foot (1), a longitudinal beam (6) located in the inner cavity of the support foot (1) is installed in the longitudinal beam mounting hole, and the longitudinal beam (6) is arranged perpendicular to the cross beam (2).

6. A modular cargo pallet according to claim 1, 2 or 3, characterized in that: A panel (8) is fixedly mounted on the upper end of the support leg (1), and the panel (8) is bonded to the upper crossbeam (2) via a connecting piece or by gluing.

7. A modular cargo pallet according to claim 3, characterized in that: The locking pin column (22) is a hemispherical body with an integrated structure with the inner side wall of the upper crossbeam mounting groove (21).

8. The combined cargo pallet according to claim 3, characterized in that: The locking pin column (22) is a cylindrical body that is an integrated structure with the inner side wall of the upper crossbeam mounting groove (21), and the end surface of the cylindrical body is an inclined slope.

9. The combined cargo pallet according to claim 3, characterized in that: The connecting column (32) is a cylindrical structure with a hemispherical body at the end, and the connecting column (32) is an integrated structure with the bottom of the lower crossbeam installation groove (31).

10. The combined cargo pallet according to claim 1, characterized in that: The upper crossbeam (2) is a plate-like structure with a rectangular cross section; the upper crossbeam mounting groove (21) is a U-shaped deep groove whose width is adapted to the thickness of the upper crossbeam (2) and whose depth is adapted to the width of the upper crossbeam (2); a locking pin column (22) is provided on the inner side wall of the upper crossbeam mounting groove (21); a locking pin hole is provided on the upper crossbeam (2) at a position corresponding to the locking pin column (22); a crossbeam connecting plate (29) is fixedly connected to the end of the upper crossbeam (2); the crossbeam connecting plate (29) is vertically arranged with the upper crossbeam (2) and connects two or more adjacent upper crossbeams (2).

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