Metal pallet type steel structure

Abstract

A metal pallet type steel structure comprises a plurality of upper panels, and each upper panel is provided with an upward bearing face and arranged at intervals. The supporting unit comprises two outer supporting columns and an inner supporting column, the outer supporting columns are combined to the two opposite ends of the bottom face of each upper panel respectively, the inner supporting column is combined to the center of the bottom face of each upper panel, the outer side of the top face of each outer supporting column is provided with an anti-cutting part in an upward protruding mode, and the anti-cutting parts are located at the two ends of each upper panel respectively; and the top of each anti-cutting part is flush with the bearing surface of each upper panel. According to the utility model, the integrally formed anti-cutting parts are convexly arranged on the top surfaces of the outer supporting columns of the pallet to prevent personnel from touching the sharp edges of the upper panels, so that the working place safety can be improved, the pallet can be manufactured into a one-way or two-way in-out pallet, and the service life can be prolonged by matching with the upper panels with high supporting strength and the ground-attached bottom plate.

Description

Technical Field

[0001] The utility model relates to a metal pallet structure, in particular to a metal pallet steel structure which can prevent people from being cut by the sharp edges of the metal pallet. Background Art

[0002] The existing metal panel A of the metal pallet is often made by bending a metal plate, and the edge of the metal plate is usually very sharp. In order to prevent the edge of the existing metal panel A from cutting people, there are several existing practices, such as Figure 1A The two ends of the existing metal panel A are bent to form rounded corners. However, if the existing metal panel A is deformed by a collision, the edges may still bend and injure people; Figure 1B In the middle, a square tube A1 is added to both ends of the existing metal panel A to block the edge, but this increases the process and cost and is difficult to implement. Figure 1C A C-shaped steel member A2 is added to each end of the existing metal panel A to block the edge. However, this creates a height difference between the C-shaped steel member A2 and the existing metal panel A, making it inconvenient to use. Furthermore, the C-shaped steel member A2 may tilt up and injure people when impacted, or may become concave and deformed in the portion supported by the existing metal panel A that is not impacted. Figure 1D In the conventional method, a vertical steel sheet A3 is added to each end of the existing metal panel A. However, the top of the vertical steel sheet A3 still has sharp edges, which still poses a safety risk. Therefore, other methods are still needed to improve the safety of metal pallets during use.

[0003] Furthermore, the existing metal panels A used in the upper and lower layers of existing metal pallets are often made of the same U-shaped steel, which has a weaker supporting strength than tubular steel. In addition, the lower metal panel A has an upward groove, which is prone to moisture or dust accumulation, resulting in a dirty environment.

[0004] In view of this, the inventors have accumulated many years of research and practical experience in related fields and have invented a metal pallet steel structure to improve the above-mentioned deficiencies of the existing technology. Utility Model Content

[0005] The main purpose of the present invention is to provide a metal pallet steel structure, which changes the supporting steel structure of the pallet to set an integrally formed anti-cutting part, thereby achieving a high degree of safety at a relatively low additional cost and can be matched with a high-strength panel structure.

[0006] To achieve the above object, the metal pallet - type steel structure of the present utility model includes a plurality of upper panels. The upper panels are arranged at intervals and each has an upward - facing bearing surface; and a support unit, which includes two outer support columns and at least one inner support column. Each outer support column is respectively combined with opposite ends of the bottom surface of each upper panel, and the inner support column is combined with the bottom surface of each upper panel and is located between the outer support columns. An anti - cut part protrudes upward from the outer side of the top surface of each outer support column. Each anti - cut part is respectively located at both ends of each upper panel, and the top of each anti - cut part is flush with the bearing surface of each upper panel. Each anti - cut part and each outer support column can be integrally formed. The above - mentioned embodiment is a one - way pallet for a stacker to enter and exit from a fixed direction, and it has a single - layer structure with only upper panels (commonly known as the "channel - type pallet").

[0007] In an embodiment of a one - way pallet, an anti - cut part protrudes downward from the outer side of the bottom surface of each outer support column, and a plurality of floor - contacting bottom plates are combined at intervals with the bottom surfaces of each outer support column and the inner support column. Each anti - cut part is respectively located at both ends of each upper panel and each floor - contacting bottom plate. Each floor - contacting bottom plate is parallel to each upper panel. The above - mentioned embodiment is a one - way pallet for a stacker to enter and exit from a fixed direction, and it has a double - layer structure with upper panels and floor - contacting bottom plates (commonly known as the "field - type pallet").

[0008] In an embodiment of a one - way pallet, each outer support column and the inner support column can be respectively a profiled steel with a lateral opening (similar to a C - shaped) or a profiled steel with a closed tubular structure according to the requirement of the bearing weight. Each anti - cut part can be respectively in a square tubular structure and can be formed by bending the profiled steel. The anti - cut part and the outer support column can be integrally formed.

[0009] In an embodiment of a two - way pallet for a stacker that can enter and exit from two directions, it includes a plurality of upper panels. The upper panels are arranged at intervals and each has an upward - facing bearing surface; and a support unit, which includes two outer connectors, at least one inner connector, at least six outer support columns, at least three inner support columns and at least three floor - contacting bottom plates. Each outer connector is respectively combined with opposite ends of the bottom surface of each upper panel. An anti - cut part protrudes upward from the outer side of the top surface of each outer connector. Each anti - cut part is respectively located at both ends of each upper panel, and the top of each anti - cut part is flush with the bearing surface of each upper panel. The bottom surfaces of the two outer connectors are respectively combined with three outer support columns at intervals. The inner connector is combined with the bottom surface of each upper panel and is located between the outer connectors. The bottom surface of the inner connector is combined with three inner support columns at intervals. Two floor - contacting bottom plates are respectively combined with the bottom ends of the outer support columns on the bottom surfaces of the two outer connectors, and one floor - contacting bottom plate is combined with the bottom ends of the inner support columns on the bottom surface of the inner connector. The above - mentioned embodiment is a structure in which the outer support columns on both outer sides and the inner support columns in the center are not connected together, commonly known as the two - way channel - type pallet.

[0010] In an embodiment of a two-way pallet, a floor plate is connected between the bottom end of each inner support column and the two outer support columns on the left and right sides, forming a so-called two-way field-shaped pallet.

[0011] In each bidirectional pallet embodiment, each outer and inner connector can be formed by folding a steel sheet, so that each outer and inner connector has a support portion on the left and right sides of the bottom end. Each support portion can be a closed tubular structure or have a lateral opening facing inward. The form of each support portion can be varied depending on the load carrying requirements. Each cut-resistant portion and each outer connector can be integrally formed.

[0012] In an embodiment using a ground-mounted base plate, the bottom end of each ground-mounted base plate can extend inward a predetermined distance on opposite sides, and then extend vertically upward to form a ground support portion. Each ground support portion is in contact with the top surface of each ground-mounted base plate, and each ground-mounted base plate has a slope on both sides. Each ground support portion can increase the load-bearing capacity of the ground-mounted base plate, and the slope of the sides makes it less likely that the tires of a pallet truck will collide with the ground-mounted base plate when approaching, and the forks of a forklift can easily bounce off when they hit the sides of the ground-mounted base plate without damaging the ground-mounted base plate. The bottom end of each ground-mounted base plate can also extend inward to the center of each ground-mounted base plate on opposite sides, and then extend vertically upward to form a ground support portion, so that the ground support portions lean against each other. Various embodiments of the ground-mounted base plate can be manufactured using an integral molding method.

[0013] In each embodiment, the two sides of each upper panel are bent inward to provide at least one reinforcement portion, and the reinforcement portion is attached to the inner side of each upper panel. Alternatively, each upper panel may be rectangular and have two long sides and two short sides, and each long side extends downward at a predetermined angle for a predetermined length and then extends horizontally toward the inner side of the load-bearing surface to the center of the load-bearing surface to form a seam, and the two side edges of the seam extend a panel support portion toward the load-bearing surface, and each panel support portion leans against each other, and at least one panel support portion leans against the bottom of the load-bearing surface. Each panel support portion can increase the load-bearing weight of the upper panel, or both panel support portions can lean against the bottom of the load-bearing surface, and each panel support portion can have a support fold to increase the area leaning against the load-bearing surface to further increase the load-bearing weight of the upper panel. Various embodiments of the upper panel can be manufactured in an integrated molding manner.

[0014] Furthermore, the panel support portion leaning against the bottom of the bearing surface has a supporting fold leaning against the bottom of the bearing surface.

[0015] Furthermore, each panel support portion leans against the bottom of the bearing surface.

[0016] Furthermore, each panel support portion has a support fold leaning against the bottom of the bearing surface.

[0017] The advantages of the present invention are that: an integrally formed anti-cut portion is provided at both ends of the metal pallet, which can completely solve the problem of people being cut by the edge of the metal pallet at a minimum cost, and can also reduce the chance of the ground-contact bottom plate being damaged and deformed by a trailer or forklift, and provides various embodiments for adjusting the load-bearing strength of the pallet.

[0018] In order to clearly and fully disclose the present invention, preferred embodiments are listed and described in detail below. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1A Schematic diagram of a prior art anti-cut pallet (1).

[0020] Figure 1B Schematic diagram of a prior art anti-cut pallet (2).

[0021] Figure 1C Schematic diagram of the prior art anti-cut pallet (3).

[0022] Figure 1D Schematic diagram of the prior art anti-cut pallet (four).

[0023] Figure 2 It is a three-dimensional diagram of embodiment (1) of the present utility model.

[0024] Figure 3 for Figure 2 Exploded diagram.

[0025] Figure 4 It is a cross-sectional schematic diagram of the upper panel of embodiment (1) of the present utility model.

[0026] Figure 5 for Figure 3 Front view of.

[0027] Figure 6 It is a front view schematic diagram of embodiment (II) of the present utility model.

[0028] Figure 7 It is a three-dimensional diagram of embodiment (three) of the present utility model.

[0029] Figure 8 This is a front exploded view of embodiment (three) of the present utility model.

[0030] Figure 9 This is a front exploded view of embodiment (four) of the present utility model.

[0031] Figure 10 It is a three-dimensional diagram of embodiment (fifth) of the present utility model.

[0032] Figure 11 for Figure 10 Exploded diagram.

[0033] Figure 12 It is a cross-sectional schematic diagram of the upper panel of embodiment (fifth) of the present utility model.

[0034] Figure 13 for Figure 11 Front view of.

[0035] Figure 14 This is a front view schematic diagram of another external connecting member of the present invention.

[0036] Figure 15 It is a three-dimensional diagram of embodiment (six) of the present utility model.

[0037] Figure 16 It is a cross-sectional schematic diagram of another upper panel of the present invention.

[0038] Figure 17 This is a cross-sectional schematic diagram of another upper panel of the present invention.

[0039] Figure 18 It is a cross-sectional schematic diagram of another floor-mounted baseboard of the present invention.

[0040] Description of Reference Numerals

[0041] 1. Upper panel;

[0042] 11. Bearing surface;

[0043] 12. Strengthening Department;

[0044] 13. Seams;

[0045] 14. Panel support;

[0046] 15. Support folding edge;

[0047] 2. Support unit;

[0048] 21. External support column;

[0049] 22. Internal support column;

[0050] 3. Anti-cutting part;

[0051] 4. Ground-fitting baseboard;

[0052] 41. Ground support portion;

[0053] 51. External connectors;

[0054] 52. Internal connectors;

[0055] 53. Support part;

[0056] A. Existing metal panels;

[0057] A1, square tube;

[0058] A2, C-shaped steel;

[0059] A3. Vertical steel sheet. DETAILED DESCRIPTION

[0060] See also Figures 2 to 5 , the accompanying drawings of the embodiments of the present invention are disclosed, and the above drawings illustrate embodiment (1) of the metal pallet steel structure of the present invention, which includes a plurality of upper panels 1, each upper panel 1 is arranged at intervals and has a bearing surface 11 facing upward; and a supporting unit 2, which includes two outer support columns 21 and at least one inner support column 22, each outer support column 21 is respectively combined with the opposite ends of the bottom surface of each upper panel 1, and the inner support column 22 is combined with the bottom surface of each upper panel 1 and is located between each outer support column 21. In embodiment (1), there is only one inner support column 22, so the inner support column 22 is combined with the center of the bottom surface of each upper panel 1. If the number of inner support columns 22 is increased and the inner support columns 22 are installed at appropriate intervals, the outer side of the top surface of each outer support column 21 is respectively provided with an anti-cutting portion 3 protruding upward, and each anti-cutting portion 3 is respectively located at both ends of each upper panel 1, and the top of each anti-cutting portion 3 is flush with the bearing surface 11 of each upper panel 1. Embodiment (1) is a one-way pallet for a forklift to move in and out from a fixed direction, and has a single-layer structure with only an upper panel 1 (commonly known as a one-way Sichuan-shaped pallet).

[0061] Both ends of each upper panel 1 (i.e., both ends in the length direction of the panel 1) are bent to form rounded corners, and each anti-cutting portion 3 has no exposed edges. Therefore, the present invention has no risk of cutting people, thereby improving workplace safety.

[0062] Figure 4 It can be seen that in embodiment (1), both sides of each upper panel 1 (i.e., both sides in the width direction of the panel 1) are bent inward to provide at least one reinforcing portion 12, and the reinforcing portion 12 is attached to the inner side of each upper panel 1. Figure 5 and Figure 6 It can be seen that each outer support column 21 and inner support column 22 is a steel section with a side opening (similar to a C-shaped, Figure 5 ) or a closed tubular structure ( Figure 6 Each anti-cut portion 3 can be a square tubular structure formed by bending a steel section and positioned outside the top surface of each outer support column 21. Each anti-cut portion 3 and each outer support column 21 can be integrally formed. The protrusions in the center of each outer support column 21 and inner support column 22 can be used for resistance welding.

[0063] exist Figure 7 and Figure 8In the third embodiment, the outer bottom surface of each outer support column 21 is also provided with a downwardly projecting anti-cut portion 3. In the third embodiment, each anti-cut portion 3 is formed by folding back the top and bottom ends of the steel section. The folded steel plate forms a circular drop-shaped arc to prevent injury. A plurality of ground-contacting bottom plates 4 are spaced apart and attached to the bottom surfaces of each outer support column 21 and the bottom surfaces of the inner support column 22. Each anti-cut portion 3 is located at each end of each upper panel 1 and each ground-contacting bottom plate 4, and each ground-contacting bottom plate 4 is parallel to each upper panel 1. The third embodiment is a one-way pallet for forklifts to enter and exit in a fixed direction, and has a double-layer structure of the upper panel 1 and the ground-contacting bottom plate 4 (commonly known as a one-way zigzag pallet).

[0064] Figure 9 It can be seen that in embodiment (four) each anti-cutting portion 3 is a square structure formed by bending the top and bottom ends of the steel section inversely. Different shapes of anti-cutting portions 3 can be used according to actual needs.

[0065] exist Figures 10 to 13 In the fifth embodiment of the present invention, a plurality of upper panels 1 are included, each of which has an upward bearing surface 11 and is arranged at intervals; and a support unit 2, which includes two external connecting members 51, at least one internal connecting member 52, at least six external support columns 21, at least three internal support columns 22 and at least three ground-attached bottom plates 4, each external connecting member 51 is respectively combined with the opposite ends of the bottom surface of each upper panel 1, and the outer side of the top surface of each external connecting member 51 is respectively protruded upward with an anti-cutting portion 3, and each anti-cutting portion 3 is respectively located on each upper panel 1, the top of each anti-cut portion 3 is flush with the bearing surface 11 of each upper panel 1, the bottom surfaces of the two outer connecting members 51 are respectively connected to the three outer support columns 21 at intervals, the inner connecting member 52 is connected to the bottom surface of each upper panel 1 and is located between the outer connecting members 51, and the bottom surface of the inner connecting member 52 is connected to the three inner support columns 22 at intervals. Two ground-facing bottom plates 4 are respectively connected to the bottom ends of the outer support columns 21 on the bottom surfaces of the two outer connecting members 51, and one ground-facing bottom plate 4 is connected to the bottom ends of the inner support columns 22 on the bottom surface of the inner connecting member 52. Example (5) is a structure in which the outer support columns 21 on both sides are not connected to the inner support columns 22 in the center, commonly known as a two-way Sichuan-shaped pallet.

[0066] In the fifth embodiment, there is only one inner connector 52, so the inner connector 52 is connected to the center of the bottom surface of each upper panel 1. If the number of inner connectors 52 is increased and the inner connectors 52 are installed at appropriate intervals, the bottom surface of each inner connector 52 can be connected to three or more inner support columns 22. In the fifth embodiment, the bottom surface of each outer connector 51 is connected to three outer support columns 21, and the bottom surface of the inner connector 52 is also connected to three inner support columns 22. If the number of outer support columns 21 of each outer connector 51 is increased, the number of inner support columns 22 of the inner connector 52 can also be increased at the same time.

[0067] Figure 12 It can be seen that in Example (five), the upper panel 1 is rectangular and has two long sides and two short sides. Each long side extends downward at a predetermined angle for a predetermined length and then extends horizontally toward the inner side of the load-bearing surface 11 to the center of the load-bearing surface 11 to form a seam 13. The two side edges of the seam 13 extend a panel support portion 14 toward the load-bearing surface 11. Each panel support portion 14 leans against each other, and at least one panel support portion 14 leans against the bottom of the load-bearing surface 11. The panel support portion 14 can increase the load-bearing weight of the upper panel 1. In Example (five), both panel support portions 14 lean against the bottom of the load-bearing surface 11.

[0068] In embodiment (fifth), the bottom of each floor-mounted base plate 4 can extend inward a predetermined distance on opposite sides, then vertically extend upward to form a ground-mounted support portion 41. Each ground-mounted support portion 41 is aligned with the top surface of each floor-mounted base plate 4, and each floor-mounted base plate 4 has a slope on both sides. Each ground-mounted support portion 41 increases the load-bearing capacity of the floor-mounted base plate 4. The slope of the sides makes it less likely that the tires of a pallet truck will collide with the floor-mounted base plate 4 when approaching, and the forks of a forklift will easily bounce off the sides of the floor-mounted base plate 4 without damaging the floor-mounted base plate 4. The bottoms of each outer support column 21 and each inner support column 22 can also have slopes on opposite sides to correspond to the slope of each floor-mounted base plate 4.

[0069] exist Figure 13 and Figure 14 As can be seen, each outer connecting member 51 and the inner connecting member 52 can be formed by folding a steel sheet, so that each outer connecting member 51 and the inner connecting member 52 has a support portion 53 on the left and right sides of the bottom end, and each support portion 53 can be a closed tubular structure ( Figure 13 ) or have a side opening facing inwards ( Figure 14 ), the form of each support portion 53 can be changed depending on the load-bearing requirements. Figure 13 and Figure 14 As can be seen, the anti-cut portion 3 and the outer support portion 53 can be formed from the same upper and lower structures, for example, the upper and lower ends of a steel plate bent into a rectangular structure. The central protrusions of each external connector 51 and internal connector 52 can be used for resistance welding. Each anti-cut portion 3 and each external connector 51 can be integrally formed.

[0070] exist Figure 15 In the sixth embodiment of the present invention, a floor-contacting base plate 4 is connected between the bottom end of each inner support column 22 and the two outer support columns 21 on the left and right sides, forming a so-called two-way cross-section pallet. If multiple inner connectors 52 are used, a floor-contacting base plate 4 can also be connected between the bottom ends of the inner support columns 22 of each inner connector 52.

[0071] Figure 16As can be seen in the figure, the panel support portion 14 of the upper panel 1 may have a supporting fold 15 to increase the area leaning against the bearing surface 11 to further increase the load-bearing weight of the upper panel 1; Figure 17 In the middle, it can be seen that both panel support portions 14 of the upper panel 1 rest against the bottom of the load-bearing surface 11, and each panel support portion 14 may have a support fold 15 to increase the area resting against the load-bearing surface 11, thereby further increasing the load-bearing capacity of the upper panel 1. Various embodiments of the upper panel 1 may be manufactured in an integrally formed manner, and both ends of various embodiments of the upper panel 1 may be bent to form rounded corners.

[0072] Figure 18 As can be seen in the figure, the bottom of each floor-mounted base plate 4 can also extend inward to the center of each floor-mounted base plate 4 on both sides, and then vertically extend upward to form a ground support portion 41, so that each ground support portion 41 leans against each other. Various embodiments of the floor-mounted base plate 4 can be manufactured using an integral molding method.

[0073] The advantages of the present invention are that the integrally formed anti-cutting portions 3 are provided at both ends of the metal pallet, which can completely solve the problem of people being cut by the edges of the metal pallet at a minimum cost, and can also reduce the chance of the ground-contacting bottom plate 4 being damaged or deformed by a tow truck or forklift. Various embodiments are provided for adjusting the load-bearing strength of the pallet.

[0074] However, the above description is only a preferred embodiment of the present invention and should not be used to limit the scope of the present invention. Any changes and modifications that are obvious to those skilled in the art should be considered as not departing from the essence of the present invention.

Claims

1. A metal pallet steel structure, characterized in that: include: A plurality of upper panels, each of which is arranged at intervals and has an upward bearing surface; and A support unit includes two outer support columns and at least one inner support column, each outer support column is respectively combined with the opposite ends of the bottom surface of each upper panel, and the inner support column is combined with the bottom surface of each upper panel and is located between the outer support columns. The outer side of the top surface of each outer support column is respectively provided with an anti-cut portion protruding upward, and each anti-cut portion is respectively located at the two ends of each upper panel, and the top of each anti-cut portion is flush with the bearing surface of each upper panel.

2. The metal pallet steel structure according to claim 1, wherein: The outer side of the bottom surface of each outer support column is respectively provided with a downwardly protruding anti-cut portion, and a plurality of ground-contact bottom plates are spaced apart and combined with the bottom surface of each outer support column and the bottom surface of the inner support column. The anti-cut portions are respectively located at the two ends of each upper panel and each ground-contact bottom plate, and each ground-contact bottom plate is parallel to each upper panel.

3. The metal pallet steel structure according to claim 1, wherein: Each outer support column and the inner support column are respectively a steel section with a lateral opening.

4. The metal pallet steel structure according to claim 1, wherein: Each outer support column and the inner support column are respectively a steel section of a closed tubular structure.

5. The metal pallet steel structure according to claim 2, wherein: Each anti-cutting portion is in a square tubular structure.

6. A metal pallet steel structure, characterized in that: include: A plurality of upper panels, each of which is arranged at intervals and has an upward bearing surface; and A support unit, which includes two external connecting members, at least one internal connecting member, at least six external support columns, at least three internal support columns and at least three ground-contacting bottom plates, each external connecting member is respectively combined with the opposite two ends of the bottom surface of each upper panel, and an anti-cut portion is protruding upward on the outer side of the top surface of each external connecting member, each anti-cut portion is respectively located at the two ends of each upper panel, and the top of each anti-cut portion is flush with the bearing surface of each upper panel, the bottom surfaces of the two external connecting members are respectively combined with the three external support columns at intervals, the internal connecting member is combined with the bottom surface of each upper panel and is located between the external connecting members, the bottom surface of the internal connecting member is combined with the three internal support columns at intervals, the two ground-contacting bottom plates are respectively combined with the bottom ends of the external support columns of the bottom surfaces of the two external connecting members, and one ground-contacting bottom plate is combined with the bottom end of the internal support columns of the bottom surface of the internal connecting member.

7. The metal pallet steel structure according to claim 6, wherein: A ground-attached bottom plate is respectively connected between the bottom end of each inner support column and the two outer support columns on the left and right sides.

8. The metal pallet steel structure according to claim 6 or 7, characterized in that: Each outer connecting member and the inner connecting member are provided with a supporting portion on the left and right sides of the bottom end respectively, and each supporting portion is a closed tubular structure.

9. The metal pallet steel structure according to claim 6 or 7, characterized in that: A supporting portion is respectively provided on the left and right sides of the bottom end of each outer connecting member and the inner connecting member, and each supporting portion has a lateral opening facing inward.

10. The metal pallet steel structure according to claim 2, 6 or 7, characterized in that: The bottom end of each ground-attached bottom plate extends inwards for a predetermined distance relative to both sides and then vertically extends upwards to form a ground support portion. Each ground support portion is respectively attached to the top surface of each ground-attached bottom plate. Both sides of each ground-attached bottom plate have a slope.

11. The metal pallet steel structure according to claim 2, 6 or 7, wherein: The bottom end of each ground-fitting base plate extends inward on both sides to the center of each ground-fitting base plate, and then extends a ground support portion vertically upward. Each ground support portion leans against each other, and each ground support portion is respectively in contact with the top surface of each ground-fitting base plate. Both sides of each ground-fitting base plate have a slope.

12. The metal pallet steel structure according to claim 1, 2, 6 or 7, wherein: Each upper panel is rectangular and has two long sides and two short sides. Each long side extends downward at a predetermined angle for a predetermined length and then extends horizontally toward the inner side of the load-bearing surface to the center of the load-bearing surface to form a seam. The two side edges of the seam extend a panel support portion toward the load-bearing surface. The panel support portions lean against each other, and at least one of the panel support portions leans against the bottom of the load-bearing surface.

13. The metal pallet steel structure according to claim 12, wherein: The panel supporting portion leaning against the bottom of the bearing surface has a supporting fold leaning against the bottom of the bearing surface.

14. The metal pallet steel structure according to claim 12, wherein: Each panel support portion leans against the bottom of the bearing surface.

15. The metal pallet steel structure according to claim 14, wherein: Each panel support portion has a support folded edge leaning against the bottom of the bearing surface.

16. The metal pallet steel structure according to claim 1, 2, 6 or 7, wherein: Both sides of each upper panel are bent inward to form at least one reinforcement portion, and the reinforcement portion is attached to the inner side of each upper panel.

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