Pallet

Abstract

To provide a technique capable of suppressing bending deformation of an upper wall portion of a fork insertion hole whose entire lower surface is open.SOLUTION: In a pallet 10A, the cross-sectional shape of first and second upper inter-girder connecting sections 30, 40 and a cargo receiving section 20 provided above a first fork insertion hole 91 in a vertical section parallel to a first direction H1 is wave-shaped, which makes it possible to increase the strength against bending that accompanies the expansion between the lower ends of the girders that sandwich the first fork insertion hole 91. That is, in the pallet 10A, the flexural strength of the upper wall portion of the first fork insertion hole 91, whose entire lower surface is open, is higher than conventional ones, making it possible to suppress bending deformation of the wall portion. Moreover, since the first and second upper inter-girder connecting sections 40 and the cargo receiving section 20 form a continuous wave-shaped configuration, they are further integrated and the load is distributed, which also increases the strength in this respect.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a pallet that has girders at a total of nine locations: the center, four corners, and midpoints of each outer edge of a rectangular deck surface on which cargo is placed. [Background technology]

[0002] Known examples of the above-mentioned pallets include a pair of first fork insertion holes that penetrate between the girders in a first direction and a pair of second fork insertion holes that penetrate between the girders in a second direction. Among such pallets, there are those in which a lower inter-girder connecting portion is provided in each of the first and second fork insertion holes (a total of four), and those in which only two fork insertion holes are provided with lower inter-girder connecting portions and the remaining two fork insertion holes are not provided with lower inter-girder connecting portions, leaving the entire underside open (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2000-255570 A (Figs. 3 and 5) Summary of the Invention [Problem to be solved by the invention]

[0004] However, in conventional pallets having the above-described first fork insertion holes with their entire undersides open, the wall above the first fork insertion hole may bend to allow the lower ends of the girders on either side of the first fork insertion hole to expand. Therefore, this application provides a technology that can suppress bending deformation of the wall above the fork insertion hole with its entire underside open. [Means for solving the problem]

[0005] One aspect of the invention of the present disclosure is a pallet that has multiple girders at a total of nine locations, including the center, four corners, and midpoints of each outer edge of a rectangular deck surface on which cargo is placed, and has a pair of first fork insertion holes that penetrate between the girders in a first direction and a pair of second fork insertion holes that penetrate between the girders in a second direction perpendicular to the first direction, and multiple lower inter-girder connection sections that connect the lower ends of the girders are provided at both ends and the middle of each second fork insertion hole, while the entire underside of each first fork insertion hole is open, and either or both of the first inter-girder wall sections that connect the upper parts of the girders above both ends of the pair of first fork insertion holes and the second inter-girder wall sections that connect the upper parts of the girders above the middle parts of the pair of first fork insertion holes have a wave-shaped cross-sectional shape in a longitudinal section parallel to the first direction. [Effects of the Invention]

[0006] In a pallet according to one aspect of the present disclosure, the cross-sectional shape in a longitudinal section parallel to the first direction of either or both of the first upper inter-girder connecting section connecting the upper parts of the girders above the pair of first fork insertion holes and the second inter-girder wall section connecting the upper parts of the girders above the intermediate portions of the pair of first fork insertion holes is wave-shaped, thereby increasing the strength against bending associated with the expansion between the lower ends of the girders sandwiching the first fork insertion holes. In other words, according to the pallet of Feature 1, the bending strength of the wall above the fork insertion holes, whose entire underside is open, is higher than before, and bending deformation of the wall can be suppressed. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view of a pallet according to one embodiment of the present disclosure. [Figure 2] Figure 2 is a perspective view of the pallet seen from diagonally below. [Figure 3] FIG. 3 is a cross-sectional side view taken along the line AA in FIG. 1. [Figure 4] FIG. 4 is a cross-sectional side view taken along the line BB in FIG. 1. [Figure 5]FIG. 5 is an enlarged side cross-sectional view of a portion of the B-B cross section in FIG. [Figure 6] Figure 6 is a perspective view of the central girder from diagonally above. [Figure 7] Figure 7 is a perspective view of the central girder from diagonally below. DETAILED DESCRIPTION OF THE INVENTION

[0008] A pallet 10A according to one embodiment of the present disclosure will be described with reference to Figures 1 to 7. As shown in Figure 1, the pallet 10A of this embodiment has girders at a total of nine locations, including the center, four corners, and midpoints of each outer edge of a rectangular deck surface 90 on which cargo is placed. The pallet 10A also has a pair of first fork insertion holes 91 that penetrate between the girders in a first direction H1 and a pair of second fork insertion holes 92 that penetrate between the girders in a second direction H2 that is perpendicular to the first direction H1. Furthermore, as shown in Figure 2, multiple lower inter-girder connection portions 80, 81 that connect the lower ends of the girders are provided at both ends and the middle of each second fork insertion hole 92, while the entire lower portion of each first fork insertion hole 91 is open.

[0009] Hereinafter, when distinguishing between multiple girder parts, the central girder part of pallet 10A will be referred to as the "central girder part 70," the girder parts at the four corners will be referred to as the "corner girder parts 73," the girder parts located on both sides of the central girder part 70 in the first direction H1 will be referred to as the "first intermediate girder part 71," and the girder parts located on both sides of the central girder part 70 in the second direction H2 will be referred to as the "second intermediate girder part 72." Furthermore, when describing multiple types of girder parts together, they will be abbreviated as "girders 70-73," or will be simply referred to as "girders" without the reference numerals.

[0010] As shown in FIG. 1, the girder sections 70 to 73 have a structure in which an inner wall 75 is provided within a cylindrical wall 74. The cylindrical wall 74 of the central girder section 70 is, for example, rectangular, while the cylindrical walls 74 of the other girder sections 71 to 73 are generally rectangular, with four flat side surfaces and four curved surfaces at the four corners. The presence or absence of curved surfaces, the position of the curved surfaces, and the shape of the cylindrical wall are not limited to those described above. The side surfaces of the vertically and horizontally aligned girder sections are arranged so as to lie on the same plane.

[0011] Pallet 10A is, for example, molded entirely from resin. Alternatively, an upper and lower section may be molded separately from a vertical midpoint and then welded together. Pallet 10A as a whole has a crosspiece structure that can be removed vertically.

[0012] As shown in Figure 2, the lower inter-girder connecting sections 80, 81 are equipped with a plurality of inter-girder ribs 82 connecting the girders, a plurality of orthogonal ribs 83 perpendicular to the plurality of inter-girder ribs 82, and an upper surface wall 84 covering the plurality of inter-girder ribs 82 and the plurality of orthogonal ribs 83 from above, and have a structure in which both ends in the width direction are inclined, as shown in Figure 3.

[0013] As shown in Figure 1, the upper part of pallet 10A is made up of first to fourth upper inter-girder connecting sections 30, 40, 50, 60 that linearly connect the girders together, a luggage receiving section 20 surrounded by the first to fourth upper inter-girder connecting sections 30, 40, 50, 60, and the upper parts of girders 70 to 73. The first to fourth upper inter-girder connecting sections 30, 40, 50, 60 and girders 70 to 73 also function as luggage receiving sections that receive luggage.

[0014] As shown in Fig. 6, the luggage receiving portion 20 has a lattice structure in which a plurality of first direction ribs 20E extending in a first direction H1 and a plurality of second direction ribs 20B extending in a second direction H2 are orthogonal to each other, and has a plurality of approximately square cells. Also, as shown in Figs. 6 and 7, each cell of the luggage receiving portion 20 is provided with an upper end wall 20A or a lower end wall 20C at the upper end or the lower end so as to narrow the opening of the cell. In other words, each cell is provided with an upper end wall 20A or a lower end wall 20C at either the upper end or the lower end, and a square through-hole 20D is formed in each cell in the upper end wall 20A or the lower end wall 20C.

[0015] Furthermore, the squares having the upper end walls 20A and the squares having the lower end walls 20C are connected in the second direction H2 to form rows of upper end wall squares having upper end walls 20A and rows of lower end wall squares having lower end walls 20C. In other words, the upper end walls 20A and the lower end walls 20C extend in the second direction H2, similar to the second direction ribs 20B. The rows of upper end wall squares and the rows of lower end wall squares are arranged alternately in the first direction H1. As a result, as shown in FIGS. 4 and 5, the cross-section of the luggage receptacle 20 taken along a plane parallel to the first direction H1 (the plane B-B in FIG. 1) has a rectangular wave shape. Note that the upper end walls 20A and the lower end walls 20C may or may not have portions extending in the first direction H1 in each square.

[0016] 7, each luggage receptacle 20 is provided with two special squares 20T each having no through-hole D and each equipped with an anti-slip member 20G. The lower end wall 20C of each special square 20T has a cylindrical bulge (not shown) that bulges upward at the center, and the anti-slip member 20G is press-fitted into the bulge. The anti-slip member 20G is made of elastomer or soft resin and has a cylindrical shape. It protrudes slightly downward from the lower end wall 20C and is adapted to abut against the forks inserted into the first fork insertion hole 91 and the second fork insertion hole 92. Furthermore, through-holes 20H for draining water are formed in the four corners of the lower end wall 20C of each special square 20T. 6, one of the two special cells 20T in each baggage receptacle 20 is provided with a reinforcing rib 20F2 that divides the interior of the cell 20T into two in the first direction H1, and the reinforcing rib 20F2 is connected to the pair of first direction ribs 20E, the bottom wall 20C, and the cylindrical bulge. The other special cell 20T is provided with a reinforcing rib 20F1 that divides the interior of the cell 20T into two in the second direction H2, and the reinforcing rib 20F1 is connected to the pair of second direction ribs 20B, the bottom wall 20C, and the cylindrical bulge.

[0017] As shown in FIG. 1, the first and second upper girder-to-upper girder connection portions 30, 40 adjacent to the luggage receiving portion 20 in the first direction H1, i.e., the first upper girder-to-upper girder connection portion 30 between the first intermediate girder portion 71 and the corner girder portion 73, and the second upper girder-to-upper girder connection portion 40 between the central girder portion 70 and the second intermediate girder portion 72, have a lattice structure similar to that of the luggage receiving portion 20. Specifically, as shown in FIG. 6, the first and second upper girder-to-upper girder connection portions 30, 40, like the luggage receiving portion 20, have a plurality of upper end walls 30A, 40A extending in the second direction H2, a plurality of lower end walls 30C, 40C extending in the second direction H2, a plurality of second direction ribs 30B, 40B extending in the second direction H2, and a plurality of first direction ribs 20E extending in the first direction H1. Like the luggage receiving section 20, the first and second upper girder connecting sections 30, 40 also have a rectangular wave-like cross-sectional shape in a section parallel to the first direction H1 (section BB in Figure 1) as shown in Figure 5. In addition, the first and second upper girder connecting sections 30, 40 also have through holes 30D, 40D formed in each square.

[0018] However, the shape of the squares of the first and second upper girder connecting sections 30, 40 is a rectangle that is longer in the second direction H2, as shown in Figure 6, and the through holes 30D, 40D (see Figure 6) are also rectangular. In addition, the multiple first direction ribs 20E of the first and second upper girder connecting sections 30, 40 and the multiple first direction ribs 20E of the aforementioned luggage receiving section 20 are continuous.

[0019] 5, at the boundary between the luggage receiving section 20 and the first upper inter-girder connecting section 30, the upper end wall 20A of the luggage receiving section 20 and the upper end wall 30A of the first upper inter-girder connecting section 30 are continuous, and the second direction rib 20B1 at one end of the luggage receiving section 20 in the first direction H1 also serves (is shared) as a side wall of the first upper inter-girder connecting section 30. Similarly, at the boundary between the luggage receiving section 20 and the second upper inter-girder connecting section 40, the upper end wall 20A of the luggage receiving section 20 and the upper end wall 40A of the second upper inter-girder connecting section 40 are continuous, and the second direction rib 20B2 at the other end of the luggage receiving section 20 in the first direction H1 also serves (is shared) as a side wall of the second upper inter-girder connecting section 40. In the upper inter-girder connecting section 30, the wall section that becomes the fork insertion opening of the first fork insertion hole 91 is inclined so as to be able to guide the fork.

[0020] As shown in Figures 1 and 3, the third upper inter-girder connection 50 between the second intermediate girder 72 and the corner girder 73 has a lattice structure. The second direction rib 20B of the third upper inter-girder connection 50 is continuous with the multiple second direction ribs 20B of the luggage receiving section 20. Furthermore, the wall portion of the third upper inter-girder connection 50 that forms the fork insertion opening of the second fork insertion hole 92 is inclined so as to be able to guide the fork (see Figure 3).

[0021] The upper and lower surfaces of the lattice squares of the third upper girder inter-connection section 50 are entirely open, and do not have anything equivalent to the upper end walls 30A, 40A or lower end walls 30C, 40C that the first and second upper girder inter-connection sections 30, 40 have, but it is also possible to configure them so that they have these upper end walls and lower end walls.

[0022] As shown in Figures 1 and 3, the fourth upper inter-girder connection section 60, which connects the central girder section 70 and a pair of first intermediate girders 71, is composed only of a pair of square-groove-shaped first-direction continuous beams 60A extending parallel to the first direction H1. The pair of square-groove-shaped first-direction continuous beams 60A have a square-groove structure with an open bottom. The pair of square-groove-shaped first-direction continuous beams 60A are arranged at two positions that divide the side of the central girder section 70 facing the first direction H1 into three equal parts in the second direction H2. The square-groove-shaped first-direction continuous beams 60A are provided with multiple internal ribs that divide the square-groove-shaped first-direction continuous beams 60A into multiple sections in the longitudinal direction. Furthermore, through holes are formed in the upper end walls of the square-groove-shaped first-direction continuous beams 60A at each of the squares separated by the internal ribs.

[0023] This concludes the description of the structure of the pallet 10A of this embodiment. Next, the effects of this pallet 10A will be described. In the pallet 10A of this embodiment, the first and second upper inter-girder connecting sections 30, 40 arranged above the pair of first fork insertion holes 91 and the load receiving section 20 have a corrugated cross-sectional shape in a longitudinal section parallel to the first direction H1. This increases the strength against bending caused by the expansion between the lower ends of the girders sandwiching the first fork insertion holes 91. That is, with the pallet 10A of this embodiment, the bending strength of the wall above the first fork insertion holes 91, whose entire underside is open, is higher than that of conventional pallets, thereby suppressing bending deformation of the wall. Moreover, the first and second upper inter-girder connecting sections 40 and the load receiving section 20 have a continuous corrugated shape, which increases their unity and distributes loads, thereby also increasing strength in this respect.

[0024] [Other embodiments] In the above embodiment, the cross-sectional wave shape of the first and second upper girder inter-section connecting portions 30, 40 and the luggage receiving portion 20 was rectangular, but for example, the second directional ribs 20B, 30B, 40B may have a trapezoidal cross-sectional wave shape inclined in the vertical direction, or the second directional ribs 20B, 30B, 40B, the upper end walls 20A, 30A, 40A, and the lower end walls 20C, 30C, 40C may have a curved wave shape.

[0025] In the above embodiment, the wave shape is continuous at the boundary between the first and second upper girder connecting sections 30, 40 and the luggage receiving section 20, but it may be divided. Also, the luggage receiving section 20 may be divided into two in the first direction H1, and the same applies to the first and second upper girder connecting sections 30, 40.

[0026] In addition, in the above embodiment, the upper end walls 30A, 40A of the first and second upper girder-to-girder connecting portions 30, 40 and the upper end wall 20A of the luggage receiving portion 20 are continuous, with the second directional rib 20B (20B1, 20B2) provided along the way, but for example, the lower end walls 30C, 40C of the first and second upper girder-to-girder connecting portions 30, 40 and the upper end wall 20A of the luggage receiving portion 20 may be connected by the second directional rib 20B. Also, the lower end walls 30C, 40C of the first and second upper girder-to-girder connecting portions 30, 40 and the lower end wall 20C of the luggage receiving portion 20 may be continuous, with the second directional rib provided along the way.

[0027] In addition, at least one of the first and second upper girder inter-connecting sections 30, 40 and the luggage receiving section 20 may be reinforced with auxiliary ribs that protrude from a midpoint in the width direction (first direction H1) of the multiple lower end walls 20C, 30C, 40C or the multiple upper end walls 20A, 30A, 40A, and face the second direction ribs 20B, 30B, 40B and extend in the second direction H2, thereby further improving bending strength.

[0028] In the above embodiment, rectangular through holes 20D, 30D, 40D were provided in the lower end walls 20C, 30C, 40C and upper end walls 20A, 30A, 40A of the first and second upper girder inter-connecting sections 30, 40 and the luggage receiving section 20, but the through holes 20D, 30D, 40D may be circular or may not be provided at all.

[0029] As shown in Figure 1, in the pallet 10A of the above embodiment, the wall portions constituting the upper inter-girder connecting portions 30, 40, 50, 60 are continuous with the inner wall 75 within the cylindrical wall 74 of the girder portions 70 to 73, but the upper inter-girder connecting portions 30, 40, 50, 60 may also extend continuously to the inside of the cylindrical wall 74.

[0030] <Additional Notes> The following describes the features extracted from the above embodiment, while indicating, as necessary, the effects, etc. Note that, for ease of understanding, the corresponding configurations in the above embodiment are indicated in parentheses as appropriate below, but these features are not limited to the specific configurations indicated in parentheses.

[0031] [Feature 1] The deck (90) has a rectangular shape on which cargo is placed, and is provided with a plurality of girders (70-73) at nine locations, including the center, four corners, and the middle of each of the outer edges. The deck (90) also has a pair of first fork insertion holes (91) that penetrate the girders (70-73) in a first direction (H1), and a pair of second fork insertion holes (92) that penetrate the girders (70-73) in a second direction (H2) that is perpendicular to the first direction (H1). At both ends and the middle of each second fork insertion hole (92), a plurality of lower inter-girder connection portions (8) that connect the lower ends of the girders (70-73) are provided. A pallet (10A) having first fork insertion holes (91) each having a first upper girder connecting portion (30) connecting the upper portions of the girders (70-73) above both ends of the pair of first fork insertion holes (91), and a second upper girder connecting portion (40) connecting the upper portions of the girders (70-73) above the middle portion of the pair of first fork insertion holes (91), wherein the cross-sectional shape in a vertical section parallel to the first direction (H1) of either or both of them is wavy.

[0032] [Feature 2] The pallet (10A) according to Feature 1, wherein the cross-sectional shape of the first and second upper inter-girder connecting portions (30, 40) in a vertical section parallel to the first direction (H1) is a wave shape.

[0033] [Feature 3] A pallet (10A) according to feature 2, wherein the luggage receiving portion (20) sandwiched between the first and second upper girder connecting portions (30, 40) in the first direction (H1) has a cross-sectional shape of a longitudinal section parallel to the first direction (H1) that is wavy, and the wavy cross-sectional shapes of the first and second upper girder connecting portions (30, 40) and the luggage receiving portion (20) are continuous.

[0034] [Feature 4] The pallet (10A) described in Feature 3, wherein the first and second upper girder inter-connecting portions (30, 40) and the luggage receiving portion (20) have a rectangular wave-shaped cross-sectional shape and include a plurality of lower end walls (20C, 30C, 40C) extending in the second direction (H2) and parallel to the deck surface (90), a plurality of upper end walls (20A, 30A, 40A) extending in the second direction (H2) and whose upper surfaces form the deck surface (90), and a plurality of second direction ribs (20B, 30B, 40B) extending in the second direction (H2) and intersecting the sides of the lower end walls (20C, 30C, 40C) and the upper end walls (20A, 30A, 40A).

[0035] [Feature 5] A pallet (10A) according to feature 4, which is provided with an auxiliary rib that protrudes from a midpoint in the first direction (H1) of the plurality of lower end walls (20C, 30C, 40C) or the plurality of upper end walls (20A, 30A, 40A), faces the second direction rib (20B, 20B1, 20B2, 30B, 40B), and extends in the second direction (H2).

[0036] [Feature 6] A pallet (10A) as described in Feature 4, wherein the upper end wall (20A, 30A, 40A) or the lower end wall (20C, 30C, 40C) is continuous at the boundary between at least one of the first and second upper girder inter-connection portions (30, 40) and the luggage receiving portion (20), and the second direction rib (20B, 30B, 40B) shared by the upper girder inter-connection portion (30, 40) and the luggage receiving portion (20) is arranged at a midpoint in the first direction (H1) on the continuous upper end wall (20A, 30A, 40A) or lower end wall (20C, 30C, 40C).

[0037] [Feature 7] A pallet (10A) according to any one of features 4 to 6, wherein the first and second upper girder inter-connecting portion (30, 40) and the luggage receiving portion (20) are provided with a plurality of first direction ribs (20E) that are perpendicular to the plurality of second direction ribs (20B, 30B, 40B) and intersect with the plurality of lower end walls (20C, 30C, 40C) and the plurality of upper end walls (20A, 30A, 40A), and the plurality of lower end walls (20C, 30C, 40C) and the plurality of upper end walls (20A, 30A, 40A) have a plurality of through holes formed therein that correspond to a plurality of squares surrounded on all four sides by the first direction ribs (20E) and the second direction ribs (20B, 30B, 40B).

[0038] [Feature 8] The pallet (10A) described in Feature 4 is provided with a plurality of first direction ribs (20E) in the luggage receiving section (20) that are perpendicular to the plurality of second direction ribs (20B, 30B, 40B) and intersect with the plurality of lower end walls (20C, 30C, 40C) and the plurality of upper end walls (20A, 30A, 40A), and reinforcing ribs (20F1, 20F2) that divide some of the plurality of squares surrounded on all sides by the first direction ribs (20E) and the second direction ribs (20B, 30B, 40B) into two.

[0039] In the pallets of Features 1 and 2, one or both of the first and second upper inter-girder connecting portions above the first fork insertion hole have a wave-shaped cross section in a longitudinal section parallel to the first direction, which increases the strength against bending caused by the expansion between the lower ends of the girders on either side of the first fork insertion hole. In other words, with the pallets of Features 1 and 2, the bending strength of the wall portion above the fork insertion hole, whose entire underside is open, is higher than before, and bending deformation of the wall portion can be suppressed.

[0040] In the pallet of feature 3, the cargo receiving section between the first and second upper girder connecting sections also has a wavy cross-sectional shape in a longitudinal section parallel to the first direction, and the wavy cross-sectional shapes of the first and second upper girder connecting sections and the cargo receiving section are continuous, so the strength against bending due to the expansion between the lower ends of the girders on either side of the first fork insertion hole is further increased.

[0041] Here, the corrugated shape may be a curved corrugated shape or a rectangular shape as in Feature 4, with a rectangular shape being more effective in increasing the moment of inertia. Furthermore, as in Feature 5, auxiliary ribs may be provided that protrude from intermediate positions in the width direction of the plurality of lower end walls or the plurality of upper end walls, face the second direction ribs, and extend in the second direction, or by adopting the configurations of Claims 6 and 8. Furthermore, as in the pallet of Feature 7, through holes may be provided in the plurality of lower end walls and upper end walls that make up the rectangular corrugated shape to reduce weight.

[0042] Although the present specification and drawings disclose specific examples of the technology included in the scope of the claims, the technology described in the claims is not limited to these specific examples, but also includes various modifications and variations of the specific examples, and also includes parts of the specific examples taken out alone. [Explanation of symbols]

[0043] 10A Pallet 20 Luggage Receiving Area 20A, 30A, 40A upper end wall 20B, 30B, 40B Second direction rib 20C,30C,40C Lower end wall 20D,30D,40D through hole 20E First direction rib 20F1, 20F2 Reinforcement rib 30 First upper girder connection 40 Second upper girder connection 70~73 digit part 80,81 Lower girder connection 90 Deck surface 91 First fork insertion hole 92 Second fork insertion hole H1 1st direction H2 2nd direction

Claims

1. The deck has a rectangular surface on which cargo is placed, and is provided with a plurality of girders at nine locations, including the center, the four corners, and the middles of each of the outer edges. The deck has a pair of first fork insertion holes that penetrate between the girders in a first direction, and a pair of second fork insertion holes that penetrate between the girders in a second direction perpendicular to the first direction. In a pallet in which a plurality of lower inter-girder connecting portions that connect the lower ends of the girders are provided at both ends and the middle of each second fork insertion hole, while the entire lower surface of each first fork insertion hole is open, A pallet in which either or both of the first upper girder inter-connecting portion that connects the upper parts of the girders above both ends of the pair of first fork insertion holes and the second upper girder inter-connecting portion that connects the upper parts of the girders above the middle parts of the pair of first fork insertion holes have a wavy cross-sectional shape in a longitudinal section parallel to the first direction.

2. 2. A pallet according to claim 1, wherein the cross-sectional shape of the first and second upper girder connecting portions in a vertical cross section parallel to the first direction is wave-shaped.

3. The luggage receiving portion sandwiched between the first and second upper inter-girder connecting portions in the first direction has a vertical cross section parallel to the first direction that has a wave shape, 3. A pallet according to claim 2, wherein the corrugated cross-sectional shape of the connecting portion between the first and second upper girders and the cargo receiving portion is continuous.

4. A pallet as described in claim 3, wherein the first and second upper girder inter-connecting portions and the luggage receiving portion have a rectangular wave-shaped cross-sectional shape and include a plurality of lower end walls extending in the second direction and parallel to the deck surface, a plurality of upper end walls extending in the second direction and whose upper surfaces form the deck surface, and a plurality of second direction ribs extending in the second direction and intersecting the sides of the lower end walls and the upper end walls.

5. 5. A pallet as described in claim 4, further comprising an auxiliary rib that protrudes from a midpoint in the first direction of the plurality of lower end walls or the plurality of upper end walls, faces the second direction rib, and extends in the second direction.

6. A pallet as described in claim 4, wherein the upper end wall or the lower end wall is continuous at the boundary between at least one of the first and second upper girder inter-connecting portions and the luggage receiving portion, and the second direction rib shared by the upper girder inter-connecting portion and the luggage receiving portion is arranged at a midpoint in the first direction on the continuous upper end wall or lower end wall.

7. The first and second upper inter-girder connecting portions and the luggage receiving portion are provided with a plurality of first direction ribs that are perpendicular to the plurality of second direction ribs and intersect with the plurality of lower end walls and the plurality of upper end walls, A pallet described in any one of claims 4 to 6, wherein a plurality of through holes corresponding to a plurality of squares surrounded on all four sides by the first directional rib and the second directional rib are formed in the plurality of lower end walls and the plurality of upper end walls.

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