METAL PALLET SECTION STEEL STRUCTURE

Abstract

A metal pallet section steel structure includes a plurality of upper surface boards, each of the upper surface boards having a carrying surface facing upwards and arranged at intervals; and a support unit, which includes two outer support poles and an inner support pole. The outer support poles are connected to two opposite sides of the bottom surface of each of the upper surface boards. The inner support pole is connected to the center of the bottom surface of each of the upper surface boards. An outer side of a top surface of each of the outer support poles is protruded upwards to form a cut protection portion, which is located at two sides of each of the upper surface boards. Each of the cut protection portions has a top flush with the carrying surface of the upper surface boards.

Description

BACKGROUND OF THE INVENTION

Technical Field of the Invention

The present invention relates generally to a metal pallet structure, and more particularly to a metal pallet section steel structure that helps prevent personnel from being cut by a sharp edge of the metal pallet.

Description of the Prior Art

A prior art metal deck board A of a prior art metal pallet is commonly made by folding and processing a metal plate. The metal plate often has edges that are very sharp. To prevent the edges of the prior art metal deck board A from cutting personnel, several ways can be implemented. For example, in FIG. 1A, two sides of a prior art metal deck board A are bent into a rounded corner. However, if the prior art metal deck board A are hit and deformed, the edges may rise and hurt people; in FIG. 1B, a square tube A1 is additionally arranged at each of two sides of a prior art metal deck board A to shield the edges, yet processing operations and costs are increased, making it hard to implement; in FIG. 1C, a C-channel steel A2 is arranged at each of two sides of a prior art metal deck board A to shield the edges, yet this makes a height difference between the C-channel steel A2 and the prior art metal deck board A, making it inconvenient to use, and the C channel steel A2, when hit, may rise and hurt people or a portion thereof that is not supported by the prior art metal deck board A may get recessed and deformed; and in FIG. 1D, a vertical steel plate A3 is arranged on each of two sides of the prior art metal deck board A, yet the top end of the vertical steel plate may still be very sharp, and thus, there is still potential risks. Thus, there is a need to provide a different way to enhance the safety of use of a metal pallet.

Further, the prior art metal deck board A that is used in upper and lower layers of the prior art metal pallet is often an inverted U-shaped steel material having the same shape, which does not have a strength of supporting that is the same as that of a tubular steel and may have an upward-facing trough formed in the prior art metal deck board A of the lower layer, in which water or dust may be easily accumulated, resulting environmental pollution.

SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide a metal pallet section steel structure, which changes the structure of supporting section steels of a pallet to form an integrated cut protection portion, so as to achieve high level of safety with a reduced additional cost and being usable in combination with a surface board structure of a high strength.

To achieve the above objective, the present invention provides a metal pallet section steel structure, which comprises a plurality of upper surface boards, each of the upper surface boards having a carrying surface facing upwards and arranged at intervals; and a support unit, which comprises two outer support poles and at least one inner support pole, the outer support poles being respectively connected to two opposite sides of a bottom surface of each of the upper surface boards, the inner support pole being connected to the bottom surface of each of the upper surface boards and located between the outer support poles, an outer side of a top surface of each of the outer support poles being protruded upwards to form a cut protection portion, the cut protection portions being respectively located at two sides of each of the upper surface boards, a top of each of the cut protection portions being flush with the carrying surface of each of the upper surface boards, each of the cut protection portions being integrally formed with the outer support poles. The above embodiment is a one-way pallet that allows a forklift to enter and exit from a fixed direction and is of a single-layer structure including only the upper surface boards (his being generally referred to as a stringer pallet).

In an embodiment of a one-way pallet, an outer side of the bottom surface of each of the outer support poles is protruded downward to form a cut protection portion, a plurality of ground-contacting bottom boards being arranged at intervals to connect to the bottom surface of each of the outer support poles and the bottom surface of the inner support pole, the cut protection portions being respectively located at two sides of each of the upper surface boards and each of the ground-contacting bottom boards, the ground-contacting bottom boards being parallel to the upper surface boards. The above embodiment is a one-way pallet that allows a forklift to enter and exit from a fixed direction and is of a double-layer structure including the upper surface boards and the ground-contacting bottom boards (this being generally referred to as a block pallet).

In an embodiment of the one-way pallet, each of the outer support poles and the inner support pole can be a section steel having a lateral opening (similar to a C-channel) or a section steel of an enclosed tubular structure according to the requirement of the load to be carried. Each of the cut protection portions presents a quadrilateral tubular structure and is formed by folding the section steel, the cut protection portion being integrally formed with the outer support poles.

An embodiment of a two-way pallet that allows a forklift to enter and exit from two directions comprises a plurality of upper surface boards, each of the upper surface boards having a carrying surface facing upwards and arranged at intervals; and a support unit, which comprises two external connecting members, at least one internal connecting member, at least six outer support poles, at least three inner support poles, and at least three ground-contacting bottom boards, the external connecting members being respectively connected to two opposite sides of a bottom surface of each of the upper surface boards, an outer side of a top surface of each of the external connecting members being protruded upwards to form a cut protection portion, the cut protection portions being respectively located at two sides of each of the upper surface boards, each of the cut protection portions having a top that is flush with the carrying surface of each of the upper surface boards, a bottom surface of each of the two external connecting members being connected to three of the outer support poles that are arranged at intervals, the internal connecting member being connected to the bottom surface of each of the upper surface boards and located between the external connecting members, a bottom surface of the internal connecting member being connected to the three inner support poles that are arranged at intervals, two of the ground-contacting bottom boards being respectively connected to bottom ends of the outer support poles of the bottom surfaces of the two external connecting members, one of the ground-contacting bottom boards being connected to bottom ends of the inner support poles of the bottom surface of the internal connecting member. The above embodiment is of a structure that the outer support poles at two outer sides are not connected to the inner support poles, this being generally referred to as a two-way stringer pallet.

In an embodiment of a two-way pallet, a ground-contacting bottom board is connected between the bottom end of each of the inner support poles and each of the two outer support poles at right and left sides to form a so-called two-way block pallet.

In each embodiment of two-way pallet, each of the external connecting members and the internal connecting member is formed by folding a steel plate such that two, left and right sides of a bottom end of each of the external connecting members and the internal connecting member are respectively formed with a supporting portion, and each of the supporting portions can be of an enclosed tubular structure or having a lateral opening facing inwardly and the configuration of the supporting portions can be changed according to the requirement for the load to be carried. The cut protection portion can be integrally formed with the external connecting members.

In an embodiment that uses ground-contacting bottom boards, two opposite sides of a bottom end of each of the ground-contacting bottom boards are extended inwardly for a predetermined distance and then vertically extended upwards to form a ground-contacting supporting portion, and the ground-contacting supporting portions each abut against a top surface of the ground-contacting bottom boards, each of the ground-contacting bottom boards having two sides each forming a slope. The ground-contacting supporting portions help increase the load carried by the ground-contacting bottom boards, and the slopes on the two sides make wheels of a pallet truck, when approaching, not easily colliding the ground-contacting bottom boards, and the forks of the forklift, when running into the two sides of the ground-contacting bottom boards, can be expelled away without causing damage to the ground-contacting bottom boards. Two sides of a bottom end of each of the ground-contacting bottom boards are also extended inwardly to the center of the ground-contacting bottom board and then vertically extended upwards to form a ground-contacting supporting portion, so that the ground-contacting supporting portions mutually abut against each other. The ground-contacting bottom boards of each embodiment can be made in a manner of being integrally formed as a one-piece structure.

In each embodiment, two sides of each of the upper surface boards are bent inwardly to form at least one reinforcement portion, the reinforcement portion being in contact with an inner side of the upper surface board. Alternatively, the upper surface boards are each of a rectangular shape having two long edges and two short edges, each of the long edges being extended downward at a predetermined angle for a predetermined length and then extended horizontally toward an inner side of the carrying surface to reach a center of the carrying surface and forming a seam, two side edges of the seam being extended toward the carrying surface to each form a surface board supporting portion, the surface board supporting portions mutually abutting against each other, at least one of the surface board supporting portions abutting against a bottom of the carrying surface. The surface board supporting portions help increase the load that the upper surface boards may carry, and it is also possible that the two surface board supporting portions are both arranged to abut against the bottom of the carrying surface, and each of the surface board supporting portion may be provided with a supporting edge fold to increase the area abutting against the carrying surface to further increase the load that the upper surface boards may carry. The upper surface boards of each embodiment can be made in a manner of being integrally formed as a one-piece structure

The advantages of the present invention are that the two sides of the metal pallet are each provided with an integrally-formed cut protection portion, which can completely solve the problem that an edge of a metal pallet may cut an operator under a condition of minimum increase of the cost and can also reduce the potential risk that the ground-contacting bottom boards are hit and deformed by a pallet truck or a forklift and also provides various example for adjusting the load carrying strength of a pallet.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A is a first schematic view showing a prior art cut-protection pallet.

FIG. 1B is a second schematic view showing a prior art cut-protection pallet.

FIG. 1C is a third schematic view showing a prior art cut-protection pallet.

FIG. 1D is a fourth schematic view showing a prior art cut-protection pallet.

FIG. 2 is a perspective view showing a first embodiment according to the present invention.

FIG. 3 is an exploded view of FIG. 2.

FIG. 4 is a schematic view showing a cross section of an upper surface board of the first embodiment according to the present invention.

FIG. 5 is a front view of FIG. 3.

FIG. 6 is a front view showing a second embodiment according to the present invention.

FIG. 7 is a perspective view showing a third embodiment according to the present invention.

FIG. 8 is a front exploded view showing the third embodiment according to the present invention.

FIG. 9 is a front exploded view showing a fourth embodiment according to the present invention.

FIG. 10 is a perspective view showing a fifth embodiment according to the present invention.

FIG. 11 is an exploded view of FIG. 10.

FIG. 12 is a schematic view showing a cross section of an upper surface board of the fifth embodiment according to the present invention.

FIG. 13 is a front view of FIG. 11.

FIG. 14 is a front view showing an alternative external connecting member of the present invention.

FIG. 15 is a perspective view showing a sixth embodiment according to the present invention.

FIG. 16 is a schematic view showing a cross section of an alternative upper surface board of the present invention.

FIG. 17 is a schematic view showing a cross section of a further alternative upper surface board of the present invention.

FIG. 18 is a schematic view showing a cross section of an alternative ground-contacting bottom board of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to FIGS. 2-5, which disclose illustrations for embodying the present invention, a description will be given to a metal pallet section steel structure according to a first embodiment of the present invention, which comprises a plurality of upper surface boards 1, each of the upper surface boards 1 having a carrying surface 11 facing upwards and arranged at intervals; and a support unit 2, which comprises two outer support poles 21 and at least one inner support pole 22, the outer support poles 21 being respectively connected to two opposite sides of a bottom surface of each of the upper surface boards 1, the inner support pole 22 being connected to the bottom surface of each of the upper surface boards 1 and located between the outer support poles 21. In the first embodiment, there is only one inner support pole 22, and thus, the inner support pole 22 is connected to the center of the bottom surface of each of the upper surface boards 1. If the number of the inner support pole 22 is increased, the inner support poles 22 can be arranged at appropriate intervals. An outer side of the top surface of each of the outer support poles 21 is protruded upwards to form a cut protection portion 3, and the cut protection portions 3 are respectively located at two sides of each of the upper surface boards 1. Each of the cut protection portions 3 has a top that is flush with the carrying surface 11 of each of the upper surface boards 1. The first embodiment is a one-way pallet that allows a forklift to enter and exit from a fixed direction and is of a single-layer structure including only the upper surface boards 1 (this being generally referred to as a stringer pallet).

Two ends of each of the upper surface boards 1 are each bent to form a rounded corner, and each of the cut protection portions 3 does not have an exposed edge. Thus, the present invention is completely devoid of any risk of cutting an operator and the work field safety is enhanced.

It is seen from FIG. 4 that in the first embodiment, two sides of each of the upper surface boards 1 are inwardly folded to form at least one reinforcement portion 12, and the reinforcement portion 12 is made in contact with an inner side of the upper surface board 1. It is seen from FIGS. 5 and 6 that each of the outer support poles 21 and the inner support pole 22 can be structured, according to the requirement for the loading to be carried, as a section steel having a lateral opening (such as a C-channel, see FIG. 5) or a structural steel having an enclosed tubular structure (see a second embodiment illustrated in FIG. 6). Each of the cut protection portions 3 can be made in the form of a quadrilateral tubular structure. The quadrilateral tubular structure is formed by folding or bending the section steel and is arranged at the outer side of the top surface of each of the outer support poles 21. The cut protection portion 3 can be integrally formed with the outer support pole 21. The center of each of the outer support poles 21 and the inner support pole 22 is raised for resistance welding purposes.

Shown in FIGS. 7 and 8 is a third embodiment, wherein an outer side of the bottom surface of each of the outer support poles 21 is also protruded, in a downward direction, to form a cut protection portion 3. In the third embodiment, cut protection portions 3 are formed by folding backwards a top end and a bottom end of the section steel, and such backward folding of the steel plate forms a rounded water-droplet shape that does not cut and hurt an operator. Further, a plurality of ground-contacting bottom boards 4 are arranged at intervals and connected to the bottom surface of each of the outer support poles 21 and the bottom surface of the inner support pole 22. The cut protection portions 3 are respectively located at two sides of each of the upper surface boards 1 and each of the ground-contacting bottom boards 4. The ground-contacting bottom boards 4 are set parallel to the upper surface boards 1. The third embodiment is a one-way pallet that only allows a forklift to enter and exit from a fixed direction and is of a double-layer structure including only the upper surface boards 1 and the ground-contacting bottom boards 4 (this being generally referred to as a one-way block pallet).

It is seen from FIG. 9 that in a fourth embodiment, the cut protection portion 3 is of a quadrilateral structure formed by backward folding a top end or a bottom end of the section steel, and various shapes can be used for the cut protection portion 3 according to practical needs.

In FIGS. 10-13, a fifth embodiment of the present invention comprises a plurality of upper surface boards 1, each of the upper surface boards 1 having a carrying surface 11 facing upwards and arranged at intervals; and a support unit 2, which comprises two external connecting members 51, at least one internal connecting member 52, at least six outer support poles 21, at least three inner support poles 22, and at least three ground-contacting bottom boards 4. The external connecting members 51 are respectively connected to two opposite sides of the bottom surface of each of the upper surface boards 1. An outer side of the top surface of each of the external connecting members 51 is protruded upwards to form a cut protection portion 3, and the cut protection portions 3 are respectively located at two sides of each of the upper surface boards 1. Each of the cut protection portions 3 has a top that is flush with the carrying surface 11 of each of the upper surface boards 1. The bottom surface of each of the two external connecting members 51 are connected to three of the outer support poles 21 that are arranged at intervals. The internal connecting member 52 is connected to the bottom surface of each of the upper surface boards 1 and is located between the external connecting members 51. The bottom surface of the internal connecting member 52 is connected to the three inner support poles 22 that are arranged at intervals. Two of the ground-contacting bottom boards 4 are respectively connected to bottom ends of the outer support poles 21 of the bottom surfaces of the two external connecting members 51, and one of the ground-contacting bottom boards 4 is connected to bottom ends of the inner support poles 22 of the bottom surface of the internal connecting member 52. The fifth embodiment is of a structure that the outer support poles 21 at two outer sides are not connected to the inner support poles 22 at the center, this being generally referred to as a two-way stringer pallet.

In the fifth embodiment, there is only one internal connecting member 52, and thus, the internal connecting member 52 is connected to the center of the bottom surface of each of the upper surface boards 1. If the number of the internal connecting member 52 is increased, the internal connecting members 52 can be arranged at appropriate intervals and each of the internal connecting members 52 can be connected, at the bottom surface thereof, to three or more inner support poles 22. In the fifth embodiment, each of the external connecting members 51 is connected, at the bottom surface thereof, to three of the outer support poles 21, and the internal connecting member 52 is also connected, at the bottom surface thereof, to three inner support poles 22. If the number of the outer support poles 21 connected to each of the external connecting members 51 is increased, the number of the inner support poles 22 connected to the internal connecting member 52 can also be increased at the same time.

It is seen from FIG. 12 that in the fifth embodiment, the upper surface boards 1 are each of a rectangular shape having two long edges and two short edges. Each of the long edges is extended downward at a predetermined angle for a predetermined length and is then extended horizontally toward an inner side of the carrying surface 11 to reach the center of the carrying surface 11 and forms a seam 13 therebetween. Two side edges of the seam 13 are extended toward the carrying surface 11 to each form a surface board supporting portion 14, and the surface board supporting portions 14 abut against each other and at least one of the surface board supporting portions 14 abuts against the bottom of the carrying surface 11. The surface board supporting portions 14 help increase the load carried by the upper surface board 1. In the fifth embodiment, the two surface board supporting portions 14 are arranged to both abut against the bottom of the carrying surface 11.

In the fifth embodiment, two opposite sides of the bottom end of each of the ground-contacting bottom boards 4 are each inwardly extended for a predetermined distance and then vertically extended upwards to form a ground-contacting supporting portion 41, and each of the ground-contacting supporting portions 41 abuts against the top surface of the ground-contacting bottom board 4. Each of the ground-contacting bottom boards 4 has two sides each forming a slope. The ground-contacting supporting portion 41 helps increase the load carried by the ground-contacting bottom board 4, and the slopes on the two sides make wheels of a pallet truck, when approaching, not easily colliding the ground-contacting bottom board 4, and the forks of the forklift, when running into the two sides of the ground-contacting bottom board 4, can be expelled away without causing damage to the ground-contacting bottom board 4. Two sides of the bottom of each of the outer support poles 21 and each of the inner support poles 22 are similarly provided with slopes corresponding to the slopes on the two sides of the ground-contacting bottom board 4.

It is seen from FIGS. 13 and 14 that each of the external connecting members 51 and the internal connecting member 52 is formed by folding a steel plate in such a way that the two, left and right sides of the bottom end of each of the external connecting members 51 and the internal connecting member 52 are each formed with a supporting portion 53, and each of the supporting portions 53 is of an enclosed tubular structure (see FIG. 13) or has a lateral opening facing inwards (see FIG. 14). The configuration of the supporting portions 53 can be changed according to the requirement for the loading to be carried. It is seen from FIGS. 13 and 14 that the cut protection portion 3 and the outer-side supporting portion 53 can be formed of upper and lower ends of the same structure, respectively, such as the upper end and the lower end of a rectangular structure formed by folding a steel plate. The center of each of the external connecting members 51 and the internal connecting member 52 can be raised for resistance welding purposes. The cut protection portion 3 can be integrally formed, as a one-piece structure, with the external connecting member 51.

In FIG. 15, in the sixth embodiment of the present invention, a ground-contacting bottom board 4 is connected between the bottom end of each of the inner support poles 22 and each of the two outer support poles 21 on the left and right sides to form a so-called two-way block pallet. If a plurality of internal connecting members 52 are used, a ground-contacting bottom board 4 may be connected between the bottom ends of the inner support poles 22 of each internal connecting member 52.

It is seen from FIG. 16 that the surface board supporting portion 14 of the upper surface boards 1 may be provided with a supporting edge fold 15 to increase the area of abutting against the carrying surface 11 to further increase the load that the upper surface boards 1 may carry; it is seen from FIG. 17 that the two surface board supporting portions 14 of the upper surface boards 1 both are arranged to abut against the bottom of the carrying surface 11, and each of the surface board supporting portions 14 is provided with a supporting edge fold 15 to increase the area of abutting against the carrying surface 11 to further increase the load that the upper surface boards 1 may carry. Each of the above-description implementations of the upper surface boards 1 can be made in an integrally formed manner to form a one-piece structure, and in each implementation, the two ends of each of the upper surface boards 1 can be bent to form a rounded corner.

It is seen from FIG. 18 that two opposite sides of a bottom end of each of the ground-contacting bottom boards 4 are extended inwardly to the center of the ground-contacting bottom board 4 and then vertically extended upwards to form a ground-contacting supporting portion 41, in such a way that the ground-contacting supporting portions 41 mutually abut against each other. Each of the implementations of the ground-contacting bottom boards 4 can be made in an integrally formed manner to form a one-piece structure.

The advantages of the present invention are that the two sides of the metal pallet are each provided with an integrally-formed cut protection portion 3, which can completely solve the problem that an edge of a metal pallet may cut an operator under a condition of minimum increase of the cost and can also reduce the potential risk that the ground-contacting bottom boards 4 are hit and deformed by a pallet truck or a forklift and also provides various example for adjusting the load carrying strength of a pallet.

Claims

1. A metal pallet section steel structure, comprising:

a plurality of upper surface boards, each of the upper surface boards having a carrying surface facing upwards and arranged at intervals; and

a support unit, which comprises two outer support poles and at least one inner support pole, the outer support poles being respectively connected to two opposite sides of a bottom surface of each of the upper surface boards, the inner support pole being connected to the bottom surface of each of the upper surface boards and located between the outer support poles, an outer side of a top surface of each of the outer support poles being protruded upwards to form a cut protection portion, the cut protection portions being respectively located at two sides of each of the upper surface boards, a top of each of the cut protection portions being flush with the carrying surface of each of the upper surface boards.

2. The metal pallet section steel structure according to claim 1, wherein an outer side of the bottom surface of each of the outer support poles is protruded downward to form a cut protection portion, a plurality of ground-contacting bottom boards being arranged at intervals to connect to the bottom surface of each of the outer support poles and the bottom surface of the inner support pole, the cut protection portions being respectively located at two sides of each of the upper surface boards and each of the ground-contacting bottom boards, the ground-contacting bottom boards being parallel to the upper surface boards.

3. The metal pallet section steel structure according to claim 1, wherein each of the outer support poles and the inner support pole comprises a section steel having a lateral opening.

4. The metal pallet section steel structure according to claim 1, wherein each of the outer support poles and the inner support pole is a section steel of an enclosed tubular structure.

5. The metal pallet section steel structure according to claim 2, wherein each of the cut protection portions presents a quadrilateral tubular structure.

6. A metal pallet section steel structure, comprising:

a plurality of upper surface boards, each of the upper surface boards having a carrying surface facing upwards and arranged at intervals; and

a support unit, which comprises two external connecting members, at least one internal connecting member, at least six outer support poles, at least three inner support poles, and at least three ground-contacting bottom boards, the external connecting members being respectively connected to two opposite sides of a bottom surface of each of the upper surface boards, an outer side of a top surface of each of the external connecting members being protruded upwards to form a cut protection portion, the cut protection portions being respectively located at two sides of each of the upper surface boards, each of the cut protection portions having a top that is flush with the carrying surface of each of the upper surface boards, a bottom surface of each of the two external connecting members being connected to three of the outer support poles that are arranged at intervals, the internal connecting member being connected to the bottom surface of each of the upper surface boards and located between the external connecting members, a bottom surface of the internal connecting member being connected to the three inner support poles that are arranged at intervals, two of the ground-contacting bottom boards being respectively connected to bottom ends of the outer support poles of the bottom surfaces of the two external connecting members, one of the ground-contacting bottom boards being connected to bottom ends of the inner support poles of the bottom surface of the internal connecting member.

7. The metal pallet section steel structure according to claim 6, wherein a ground-contacting bottom board is connected between the bottom end of each of the inner support poles and each of the two outer support poles at right and left sides.

8. The metal pallet section steel structure according to claim 6, wherein two sides of a bottom end of each of the external connecting members and the internal connecting member are each formed with a supporting portion, and each of the supporting portions is of an enclosed tubular structure.

9. The metal pallet section steel structure according to claim 6, wherein two sides of a bottom end of each of the external connecting members and the internal connecting member are each formed with a supporting portion, and each of the supporting portions is formed with a lateral opening facing inwards.

10. The metal pallet section steel structure according to claim 6, wherein two opposite sides of a bottom end of each of the ground-contacting bottom boards are extended inwardly for a predetermined distance and then vertically extended upwards to form a ground-contacting supporting portion, and the ground-contacting supporting portions each abut against a top surface of the ground-contacting bottom board, each of the ground-contacting bottom boards having two sides each forming a slope.

11. The metal pallet section steel structure according to claim 6, wherein two opposite sides of a bottom end of each of the ground-contacting bottom boards are extended inwardly to a center of the ground-contacting bottom board and then vertically extended upwards to form a ground-contacting supporting portion, the ground-contacting supporting portions being arranged to mutually abut against each other, and the ground-contacting supporting portion abutting against a top surface of the ground-contacting bottom board, each of the ground-contacting bottom boards having two side each forming a slope.

12. The metal pallet section steel structure according to claim 6, wherein each of the upper surface boards is of a rectangular shape having two long edges and two short edges, each of the long edges being extended downward at a predetermined angle for a predetermined length and then extended horizontally toward an inner side of the carrying surface to reach a center of the carrying surface and forming a seam, two side edges of the seam being extended toward the carrying surface to each form a surface board supporting portion, the surface board supporting portions mutually abutting against each other, at least one of the surface board supporting portions abutting against a bottom of the carrying surface.

13. The metal pallet section steel structure according to claim 12, wherein the one of the surface board supporting portions that abuts against the bottom of the carrying surface is provided with a supporting edge fold abutting against the bottom of the carrying surface.

14. The metal pallet section steel structure according to claim 12, wherein each of the surface board supporting portions abuts the bottom of the carrying surface.

15. The metal pallet section steel structure according to claim 14, wherein each of the surface board supporting portions has a supporting edge fold abutting against the bottom of the carrying surface.

16. The metal pallet section steel structure according to claim 6, wherein two sides of each of the upper surface boards are inwardly folded to form at least one reinforcement portion, and the reinforcement portion is in contact with an inner side of the upper surface board.