JP2005206195A - Plastic pallet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the strength of a synthetic resin pallet, to perform stacking in a stable state, and to prevent deformation or breakage of a synthetic resin pallet or a load.
[Explanation Means] The upper plate-like portion 2 and the lower plate-like portion 3 and the plurality of girders 4 for connecting the upper plate-like portion 2 and the lower plate-like portion 3 are provided. Between the parts 3, a fork insertion hole 9 extending in one direction and a pallet track insertion hole 10 extending in the other direction and intersecting the fork insertion hole 9 are respectively formed. The first crosspiece 15 is constructed between the girder parts 4 adjacent in the other direction and the second crosspiece 16 is constructed between the girder parts 4 adjacent in one direction. Is the other side of the wheel insertion opening 17 in the synthetic resin pallet 1 in which the wheel insertion opening 17 communicated with the pallet truck insertion hole 10 is surrounded by the first beam 15 and the second beam 16. Corresponds to 55% to 75% of the width of the fork insertion hole 9.
[Selection] Figure 2

Description

  The present invention relates to a synthetic resin pallet used for transporting and storing various articles and the like, and relates to a synthetic resin pallet that can be used with a forklift and a pallet truck.

  Conventionally, a four-way synthetic resin pallet has been provided as a synthetic resin pallet used for transporting and storing articles. This kind of synthetic resin pallet is composed of an upper surface plate-like portion and a lower surface plate-like portion arranged in parallel to each other and a plurality of girders connecting the upper surface plate-like portion and the lower surface plate-like portion. . The top plate portion and the bottom plate portion are connected by girders arranged at the four corners and in the middle, respectively, and the fork of the forklift is inserted between the top plate portion and the bottom plate portion. There are provided spaces for forming a fork insertion hole and a pallet track insertion hole into which the pallet track is inserted.

  The fork insertion hole and the pallet track insertion hole extend in directions orthogonal to each other, and intersect between the upper surface plate-shaped portion and the lower surface plate-shaped portion. The fork insertion hole and the pallet track insertion hole are formed so as to pass between adjacent beam portions, and the gap between the adjacent beam portions corresponds to the width of the fork insertion hole and the width of the pallet track insertion hole. Further, the lower surface plate-like portion is adjacent to the first bar laid between the adjacent beam portions in the direction in which the pallet track insertion hole extends, and in the direction in which the fork insertion hole extends. It is comprised from the 2nd crosspiece constructed between the girder parts.

  By the way, the tip of the pallet truck is provided with a wheel that moves up and down in an arc shape around a shaft that rotates in the vertical direction. The bottom plate-like portion of the synthetic resin pallet moves downward and moves downward. A wheel insertion opening through which the overhanging wheel is inserted is formed. The wheel projecting below the lower plate-like portion is grounded to the floor, and the synthetic resin pallet is movable by the wheel. The wheel insertion opening is formed by being surrounded by two parallel first and second bars, and the dimension of the wheel insertion opening corresponds to the width of the fork insertion hole and the width of the pallet truck insertion hole. .

In addition, since wheels having a diameter larger than the thickness of the pallet truck or fork are usually used, the height of the pallet truck insertion hole into which the pallet truck is inserted needs to be larger than the diameter of the wheel. Higher than the fork insertion hole. Therefore, the second rail that forms the bottom surface of the pallet track insertion hole may be formed thinner than the first rail that forms the bottom surface of the fork insertion hole (see, for example, Patent Document 1). Conventionally, in order to reinforce the thinly formed second beam, a thick portion is formed in a certain range of the connecting portion between the second beam and the girder, and the thick portion is prevented from being deformed during molding. Some pallets have holes (for example, see Patent Document 2).
JP 2002-120835 A Japanese Patent No. 3371357

  However, in general, the fork insertion hole and the pallet truck insertion hole are formed wide in consideration of ease of insertion of the fork and pallet truck, and the wheel insertion opening is formed of the width of the fork insertion hole and the pallet truck insertion hole. Since it is formed with a dimension corresponding to the width, the conventional synthetic resin pallets described in Patent Documents 1 and 2 have a problem that the wheel insertion opening has a considerable size. If the wheel insertion opening is large, when the bags filled with powdered material are stacked and stacked, the lower bag fits into the wheel insertion opening of the upper synthetic resin pallet, and the upper synthetic resin pallet When the fork is inserted into the fork insertion hole, the lower bag may be damaged. In addition, when a load such as a tire wheel is placed on a synthetic resin pallet and a synthetic resin pallet on which the load is further placed is placed on the load for stacking, the lower load is the upper synthetic resin pallet. There is a risk that the baggage fitted into the wheel insertion opening cannot be piled up in a stable state, and the pallet made of synthetic resin or the baggage fitted into the wheel insertion opening may be deformed or damaged.

  Further, when the second bar is formed thinner than the first bar, the conventional synthetic resin pallet described in Patent Document 2 described above reinforces the thin second bar by forming a thick portion. However, there is a problem that the reinforcing effect is substantially poor because the inside of the thick portion is thinned.

  In view of such circumstances, the present invention can be stably stacked when using a synthetic resin pallet to prevent deformation or breakage of the synthetic resin pallet or luggage. It aims to provide a pallet made of synthetic resin. Another object of the present invention is to effectively reinforce the thinly formed second beam and improve the maximum load capacity of the synthetic resin pallet.

  A synthetic resin pallet according to the present invention includes an upper surface plate-like portion and a lower surface plate-like portion arranged in parallel to each other, and a plurality of girders for connecting the upper surface plate-like portion and the lower surface plate-like portion, Between the face plate portion and the bottom plate portion, a fork insertion hole is formed which extends between the adjacent beam portions and extends in one direction, and passes between the adjacent beam portions and is orthogonal to the fork insertion hole. A pallet track insertion hole extending in the direction and intersecting with the fork insertion hole is formed, and the lower surface plate-like portion is adjacent to the first rail installed between the beam portions adjacent in the other direction in one direction. It is comprised from the 2nd crosspiece spanned between the matching girder parts, and the wheel insertion opening connected to the pallet track insertion hole is surrounded by the first crosspiece and the second crosspiece in the bottom plate-like part. Width of the wheel insertion opening in the other direction on the plastic pallet , Characterized in that it corresponds to 55% to 75% of the width of the fork insertion holes.

  Due to the above characteristics, the width of the wheel insertion opening on the other direction side is 55% or more of the width of the fork insertion hole, so that the wheel of the pallet truck that moves up and down in an arc shape does not contact the second crosspiece. Insert through the opening. In addition, since the width of the wheel insertion opening on the other direction side is 75% or less of the width of the fork insertion hole, the possibility that the lower luggage will be fitted when stacked is reduced, and the second formed thinly The crosspiece is effectively reinforced. In order to further enhance the reinforcing effect of the second crosspiece, the width of the wheel insertion opening on the other direction side is preferably 70% or less of the width of the fork insertion hole.

  According to the synthetic resin pallet according to the present invention, the width of the wheel insertion opening in the other direction corresponds to 55% to 75% of the width of the fork insertion hole. Therefore, the size of the wheel insertion opening is the width of the fork insertion hole. It is smaller than the conventional wheel insertion opening that has been formed, and stable stacking can be performed, and deformation of the load placed on the synthetic resin pallet or the synthetic resin pallet can be prevented. Moreover, the thin 2nd crosspiece can be effectively reinforced and the maximum load capacity of the synthetic resin pallet can be improved.

In the synthetic resin pallet, the second crosspiece is formed thinner than the first crosspiece, and the side part of the second crosspiece is formed so as to protrude from the girder to the wheel insertion opening side. Both ends of the part are joined to the first bar.
As a result, the size of the wheel insertion opening is smaller than the wheel insertion opening of the conventional synthetic resin pallet, so that the possibility of luggage being fitted into the wheel insertion opening is reduced and the area of the thin second crosspiece is reduced. Becomes larger and the strength of the second crosspiece is secured. In addition, since the second beam is joined to the first beam, the strength of the first beam increases.

  An embodiment of the present invention will be described with reference to FIGS. 1 to 5 by taking a synthetic resin pallet 1 as an example. FIG. 1 is a perspective view showing the upper surface of the synthetic resin pallet 1, FIG. 2 is a perspective view showing the lower surface of the synthetic resin pallet 1, and FIG. 3 is a cross-sectional view taken along line AA shown in FIG. 4 is a cross-sectional view taken along the line B-B shown in FIG. 3, FIG. 5 is a cross-sectional view taken along the line C-C shown in FIG. 3, and FIG. It is sectional drawing showing the state which lifted the pallet. The pallet truck T in this specification refers to a fork arm of a pallet truck (JIS B 8930-1999) defined in Japanese Industrial Standards. As shown in FIGS. 1, 2, and 3, the synthetic resin pallet 1 is formed in a rectangular box shape as a whole, and includes an upper surface plate-like portion 2 and a lower surface plate-like portion 3 arranged in parallel to each other. And a plurality of girders 4 that connect the upper plate-like portion 2 and the lower plate-like portion 3.

  The synthetic resin pallet 1 is made of a synthetic resin such as polyethylene or polypropylene, for example, and includes an upper surface mold member 5 in which the upper surface plate-shaped portion 2 and the upper portion of the beam portion 4 are integrally formed, and the lower surface plate-shaped portion 2 and the beam portion 4. It is formed by thermally welding a lower surface mold member 6 having a lower part formed integrally. On the inner surface of the upper surface mold member 5 and the outer surface of the lower surface member 6, lattice-like ribs 7 are formed, respectively, and a plurality of large and small rectangular chamber portions 8 are formed.

  As shown in FIGS. 4 and 5, the plurality of girders 4 are arranged at intervals so that there is a gap between the adjacent girders 4. The four corners of the part 3, the middle part of the four sides of the upper surface plate-like part 2 and the lower surface plate-like part 3, and the central part of the upper surface plate-like part 2 and the lower surface plate-like part 3 are formed.

  As shown in FIGS. 1, 2, 3, 4, 5, and 6, it extends in one direction (the X direction shown in the figure) between the upper surface plate-like portion 2 and the lower surface plate-like portion 3. Two fork insertion holes 9 into which forks of a forklift (not shown) are inserted are formed in parallel, and extend in the other direction (Y direction shown in the figure) perpendicular to the fork insertion hole 9 to extend into the pallet truck. Two 10 are formed in parallel. The fork insertion hole 9 and the pallet track insertion hole 10 intersect each other, and the fork insertion hole 9 is formed so as to pass between adjacent beam portions 4 in the other direction. It is formed so as to pass between the adjacent beam portions 4 in the direction.

  The fork insertion hole 9 and the pallet track insertion hole 10 are respectively penetrated, and the insertion port 11 of the fork insertion hole 9 is formed on the side surface of one of the synthetic resin pallets 1 out of the two opposing surfaces of the synthetic resin pallet 1. In addition, an insertion port 12 for the pallet track insertion hole 10 is formed on the side surface of the other synthetic resin pallet 1.

  As shown in FIG. 1, the outer surface of the upper plate-like portion 2 (the loading surface 1 a of the synthetic resin pallet 1) is formed smoothly so that a bag such as a bag (not shown) can be placed in a stable state. In addition, a plurality of linear surface non-slip portions 13 extending in the other direction are formed on the loading surface to prevent the loaded luggage from slipping. The plurality of anti-slip portions 13 are formed in parallel at intervals, and are made of, for example, an elastomer-based tape and bonded to the loading surface 1a while being melted by heat.

  As shown in FIGS. 1, 3, and 4, the upper surface plate-like portion 2 where the fork insertion hole 9 and the pallet track insertion hole 10 cross each other has a fork or pallet truck T (not shown) for preventing slippage. Two grommets 14 are formed for each. The grommet 14 is made of, for example, an elastomeric columnar member, is inserted through the upper surface plate-like portion 2, and protrudes about 1 to 2 mm inward.

  As shown in FIG. 2 and FIG. 3, the lower surface plate-like portion 3 is formed between a plurality of first bars 15 installed between the beam portions 4 adjacent in the other direction and the beam portions 4 adjacent in one direction. A plurality of second crosspieces 16 are constructed. The first crosspiece 15 and the second crosspiece 16 are the entire thick plate in which the lattice-like ribs 7 are integrally formed on the back surface of the flat plate, and the first crosspiece 15 and the second crosspiece 16 include a plurality of pieces. Each rectangular chamber portion 8 is formed.

  The bottom surface of the fork insertion hole 9 is formed by the inner surface of the first rail 15, and the bottom surface of the pallet track insertion hole 10 is formed by the inner surface of the second rail 16. Since the pallet truck insertion hole 10 into which the pallet truck T with wheels is inserted needs to be higher than the fork insertion hole 9 by the amount of the wheel, the second beam 16 is formed thinner than the first beam 15. ing. Further, the first and second crosspieces 15 and 16 are each formed of a rectangular plate shape, and the adjacent first crosspieces 15 are formed with a gap, and the adjacent second crosspieces 16 are formed with a gap. It is formed with a gap.

  Further, a wheel insertion opening 17 communicating with the pallet track insertion hole 10 at a location intersecting the fork insertion hole 9 is formed in the lower surface plate-like portion 3. The wheel insertion opening 17 is formed between the adjacent second bars 16 and is formed in a rectangular shape surrounded by the first and second bars 15 and 16 and the girder 4. In addition, two wheel insertion openings 17 are formed for one pallet truck insertion hole 10 so that the pallet truck T can be inserted into the pallet truck insertion hole 10 from both directions. A plurality of (four places) are formed around the girder 4.

  As shown in FIGS. 2 and 3, among the plurality of second crosspieces 16, the inner portion 16 a of the second crosspiece 16 constructed between the four corner beam portions 4 and the four side intermediate beam portions 4 is The four corners or the middle part of the four sides are formed so as to protrude to the inner side (wheel insertion opening 17 side). Both ends 16b of the inner portion 16a of the second beam 16 projecting from the beam portion 4 are joined to the side portions of the first beam 15, respectively.

  5 and 6, the width dimension D1 on one side of the wheel insertion opening 17 corresponds to the one-way length L of the adjacent second crosspiece 16 or the width W1 of the pallet track insertion hole 10. To do. On the other hand, the width dimension D2 on the other side of the wheel insertion opening 17 is a dimension that allows the wheel S to move up and down in an arc shape and secure the strength of the second crosspiece 16, and is 55% of the width W2 of the fork insertion hole 9. This corresponds to ˜75% (about 70% in the figure). Further, both side surfaces 16c of the second crosspiece 16 installed between the central beam portion 4 and the four-side intermediate portion of the beam portion 4 are brought closer to the inner side than both side surfaces of the central or four-side intermediate portion of the beam portion 4. ing. In addition, if the width dimension D2 on the other side of the wheel insertion opening 17 is 55% to 75% of the width W2 of the fork insertion hole 9, it is between the central spar 4 and the middle part 4 of the four sides. The both side surfaces 16c of the installed second crosspiece 16 may be flush with the both side surfaces of the central or four-side intermediate beam portion 4 and outside the both side surfaces of the central or four-side intermediate beam portion 4. It may be overhanging.

  Further, as shown in FIG. 2, the synthetic resin pallet 1 itself is prevented from slipping on the outer surface (the bottom surface 1b of the synthetic resin pallet 1) of the lower surface type member 6 that contacts the floor on which the synthetic resin pallet 1 is placed. For this reason, a plurality of back surface antiskid parts 18 similar to the front surface antiskid part 13 are formed. The plurality of (two) back surface non-slip portions 18 extend in the other direction, and are respectively formed at the center of the first bar 15 and the girder 4 provided on both ends of the synthetic resin pallet 1. ing.

  Next, a method for manufacturing the synthetic resin pallet 1 having the above-described configuration will be described.

  The synthetic resin pallet 1 can be formed by separately molding the upper surface mold member 5 and the lower surface mold member 6 by an injection molding method and welding the molded upper surface mold member 5 and lower surface mold member 6, respectively. . Specifically, first, a mold for the upper surface mold member 5 and the lower surface mold member 6 is prepared, and an appropriate amount of molten plastic material is poured into the mold. At this time, two cylindrical through holes are formed in the upper plate portion 2 where the fork insertion hole 9 and the pallet track insertion hole 10 intersect. A hollow portion can be formed inside the upper surface mold member 5 and the lower surface mold member 6 by injecting a gas into the molten plastic material immediately after pouring the molten plastic material into the mold. Thereby, the upper surface mold member 5 and the lower surface mold member 6 having a small molding distortion and a smooth surface are obtained.

  Next, after the proper solidification time has elapsed, the mold is removed, and the solidified upper surface mold member 5 and lower surface mold member 6 are respectively taken out. And the upper surface type | mold member 5 and the lower surface type | mold member 6 are piled up so that the inner surface of the upper surface plate-shaped part 2 and the lower surface plate-shaped part 3 may each oppose, and joining surfaces are welded by heat. Further, an elastomeric tape is bonded to the outer surface of the upper plate-like portion 2 while being melted by heat, and the surface non-slip portion 13 is formed on the loading surface 1 a of the synthetic resin pallet 1. In addition, an elastomeric tape is bonded to the outer surface of the lower surface plate-like portion 3 while being melted by heat to form the back surface non-slip portion 18 on the bottom surface 1 b of the synthetic resin pallet 1. Further, the grommet 14 is formed by inserting the elastomer members into the cylindrical through holes formed in the upper surface type member 5 up to about 1 to 2 mm inward. The synthetic resin pallet 1 is manufactured through the above steps.

  Next, a method of using the synthetic resin pallet 1 having the above-described configuration will be described.

  The synthetic resin pallet 1 is a synthetic resin pallet that can be used for either a forklift or a pallet truck T, and a forklift or pallet with a baggage or the like loaded on the loading surface 1a of the synthetic resin pallet 1 is used. It can be moved by the track T. When using a forklift, the two forks of the forklift are inserted into the two fork insertion holes 9, respectively, and the two forks are moved together to move upward. When the two forks move upward, the synthetic resin pallet 1 is lifted in a horizontal state, and the synthetic resin pallet 1 is transported by moving the forklift with the synthetic resin pallet 1 lifted.

  On the other hand, when using the pallet truck T, the pallet truck T with wheels is inserted into the pallet truck insertion hole 10 as shown in FIG. When inserting the pallet truck T, after inserting the pallet truck T to a predetermined position where the wheel S faces the wheel insertion opening 17, the wheel S is moved downward so as to be inserted through the wheel insertion opening 17. The pallet 1 is lifted up. Thus, the synthetic resin pallet 1 is supported by the pallet truck T with the wheels S and travels by the wheels S of the pallet truck T. The top surface of the fork and the top surface of the pallet truck T are in contact with the grommet 14 shown in FIGS. 3 and 4, respectively, so that the fork and the pallet truck T are prevented from slipping.

  Usually, the synthetic resin pallet 1 is arranged on the floor. However, the synthetic resin pallet 1 can also be arranged on a load loaded on the synthetic resin pallet 1, and the synthetic resin pallets 1 are stacked on the basis of the load. You can also. Specifically, first, a load is placed on the lower synthetic resin pallet 1 so that a horizontal plane is formed at the top. At this time, the baggage is arranged on the stacking surface 1b of the synthetic resin pallet 1 in a uniform manner without moving to one side. Next, the upper synthetic resin pallet 1 on which the load is placed is lifted by a forklift, and the upper synthetic resin pallet 1 is placed on the load placed on the lower synthetic resin pallet 1.

  According to the above-described synthetic resin pallet 1, the width L 2 on the other side of the wheel insertion opening 17 corresponds to 55% to 75% of the width of the fork insertion hole 9. The wheel has a size that allows the wheel to be inserted, and is formed small enough to prevent the lower load from being fitted when the synthetic resin pallets 1 are stacked. As a result, when the plastic pallet 1 is used for stacking, the lower baggage does not fit into the wheel insertion opening 17, and stable stacking can be performed. It is possible to prevent deformation of the load placed on the synthetic resin pallet 1.

  Further, the lower surface plate-like portion 3 includes a plurality of first bars 15 respectively installed between the girder portions 4 adjacent in the other direction and a plurality of second bars constructed between the girder portions 4 adjacent in one direction. Since the inner portion 16a of the second crosspiece 16 is overhanging because it is composed of the crosspieces 16, the area of the second crosspiece is increased by the amount of overhanging, and the thin second crosspiece 16 The strength is ensured, and the maximum loading capacity of the synthetic resin pallet 1 is improved. In addition, since both ends 16b of the inner portion 16a of the second beam 16 projecting from the girder 4 are respectively joined to the side portions of the first beam 15, the first beam 15 and the second beam 16 The strength of the crosspiece 16 increases. As a result, the maximum load weight of the synthetic resin pallet 1 can be increased, and more luggage can be placed on the synthetic resin pallet 1.

  As mentioned above, although embodiment of the synthetic resin pallets concerning this invention was described, this invention is not limited to above-described embodiment, In the range which does not deviate from the meaning, it can change suitably. For example, in the above-described embodiment, the synthetic resin pallet 1 includes the upper surface mold member 5 formed by integrally forming the upper surface plate-like portion 2 and the upper portion of the girder portion 4, and the lower surface plate-like portion 2 and the lower portion of the girder portion 4. The lower surface mold member 6 formed integrally is separately molded, and the upper surface mold member 5 and the lower surface mold member 6 are formed by heat welding. The part 2 and the girder part 4 may be integrally formed.

  FIG. 7 is a sectional view of the fork insertion hole 101 in the synthetic resin pallet 100 formed by integral molding cut in the axial direction, and FIG. 8 shows the pallet track insertion hole 102 in the synthetic resin pallet 100 formed by integral molding. It is sectional drawing cut | disconnected in the direction. As shown in FIGS. 7 and 8, for example, the synthetic resin pallet 100 has a plate-shaped mold member 104 suspended from the center of the inner surface of the two sandwiching members 103. It is also possible to form a die-cutting block 105 between two opposing sandwiching members 103 that are opposed to each other and to pour a molten plastic material between the two opposing sandwiching members 103.

  A plurality of mold members 104 are provided on each of the sandwiching members 103 at intervals, and the mold members 104 respectively suspended from the opposing sandwiching members 103 are engaged with each other to form a rectangular plate member 109. Thus, the wheel insertion opening 106 is formed. The block 105 includes a rectangular first block 105 a that forms the fork insertion hole 101, and a rectangular second block 105 b that forms the pallet track insertion hole 102. The first crosspiece 107 and the second crosspiece 108 installed between the central girder portion and the four-side middle girder portion are formed by a plurality of mold members 104 engaged with each other. Thus, by forming the synthetic resin pallet 100 by the integral molding method, the heat welding step between the upper surface mold member and the lower surface mold member is not required, and the production efficiency can be improved.

  Moreover, in above-mentioned embodiment, the inner part 16a of the 2nd crosspiece 16 constructed between the girder part 4 of the four corners and the girder part 4 of the middle part of the four sides among the plurality of second crosspieces 16 is a girder. Although projecting inward from the portion 4, the present invention is provided on both sides of the second beam which is constructed between the four-side intermediate beam portion and the central beam portion among the plurality of second beam beams 16. The part or one side part may be overhanging.

  In the above-described embodiment, the synthetic resin pallet 1 has the lattice-like ribs 7 formed on the inner surface of the upper surface mold member 5 and the outer surface of the lower surface mold member 6, respectively. The ribs may not be provided on condition that a predetermined strength is obtained, and a lattice structure having a plurality of chambers penetrating the upper surface plate portion 2 or the lower surface plate portion 3 may be used.

It is a perspective view of the synthetic resin pallet surface showing embodiment of the synthetic resin pallet which concerns on this invention. It is a perspective view of the back surface of a synthetic resin pallet representing an embodiment of a synthetic resin pallet according to the present invention. It is sectional drawing between AA shown in FIG. 1 for demonstrating embodiment of the synthetic resin pallets which concern on this invention. It is sectional drawing between BB shown in FIG. 3 for demonstrating embodiment of the synthetic resin pallets which concern on this invention. It is CC sectional drawing shown in FIG. 3 for demonstrating embodiment of the synthetic resin pallets which concern on this invention. It is sectional drawing showing the state which used the pallet truck for describing embodiment of the synthetic resin pallets which concern on this invention. It is sectional drawing of the fork insertion hole showing the other shaping | molding method of the synthetic resin pallets which concern on this invention. It is sectional drawing of the pallet track insertion hole showing the other shaping | molding method of the synthetic resin pallets which concerns on this invention.

Explanation of symbols

1,100 Synthetic resin pallet 2 Upper surface plate portion 3 Lower surface plate portion 4 Girder portion 9, 102 Fork insertion hole 10, 103 Pallet track insertion hole 17, 106 Wheel insertion opening 15, 107 First crosspiece 16, 108 2 piers

Claims (1)

An upper surface plate-shaped portion and a lower surface plate-shaped portion disposed in parallel with each other, and a plurality of girders for connecting the upper surface plate-shaped portion and the lower surface plate-shaped portion,
Between the upper plate-like portion and the lower plate-like portion, a fork insertion hole extending in one direction passing between the adjacent beam portions is formed, and the fork passes between the adjacent beam portions. A pallet track insertion hole that extends in the other direction perpendicular to the insertion hole and intersects the fork insertion hole is formed,
The lower surface plate-like portion is composed of a first beam spanned between the beam portions adjacent in the other direction, and a second beam bridged between the beam portions adjacent in one direction,
In the lower surface plate-like portion, in the synthetic resin pallet in which a wheel insertion opening communicated with the pallet track insertion hole is surrounded by the first rail and the second rail,
The width of the wheel insertion opening in the other direction corresponds to 55% to 75% of the width of the fork insertion hole.

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