Synthetic resin pallet and fork insertion assist system for synthetic resin pallets

Abstract

This invention provides a fork insertion assistance system that can provide workers with information regarding fork insertion holes by markings on the outer surface of the pallet's peripheral beam. [Solution] The pallet 10 includes a fork insertion hole 50 that opens outward from the pallet, and a mark portion 60 attached to the outer circumferential surface of the peripheral beam 30R that represents information about the fork insertion hole. The mark portion is located on a central imaginary line CL passing through the center of the fork insertion hole in the vertical direction, and has a horizontal axis portion 65 that can reflect laser light emitted from the laser irradiation unit of the forklift. The peripheral beam with the mark portion has a recessed portion 35 provided on the outer circumferential surface of the pallet in accordance with the mark portion, either inside or outside the area where the mark portion is attached, and a raised portion 36 provided linearly outside the above area on the outer circumferential surface of the pallet, protruding outward from the outer circumferential surface of the pallet.

Description

Technical Field

[0001] The present invention relates to a synthetic resin pallet used for carrying a load by a forklift, and a fork insertion assisting system for a synthetic resin pallet for inserting the fork of the forklift into the fork insertion hole of the synthetic resin pallet.

Background Art

[0002] Conventionally, pallets used for carrying loads are known (for example, see Patent Document 1). The pallet of this Patent Document 1 includes a placement wall on which a load is placed, and a girder extending in the vertical direction intersecting the placement wall from the placement wall (where both the vertical direction and the left - right direction described later are directions based on the state where a load is placed on the placement wall). The girder includes a peripheral girder visible in a side view of the pallet, and the peripheral girder has left - right girders provided at both ends in the left - right direction and an intermediate girder provided between the two left - right girders. The pallet is also provided with fork insertion holes that are provided in pairs at a distance in the left - right direction with the intermediate girder in between and open outward of the pallet.

[0003] In the above - mentioned pallet, a hole portion penetrating in the inner - outer direction of the intermediate girder is provided on the outer peripheral surface of the intermediate girder of the pallet. This hole portion is a mark indicating the orientation of the pallet. This hole portion is provided in one of the intermediate girders that form a pair with the other intermediate girder sandwiching the center of the pallet, but is not provided in the other intermediate girder. Therefore, according to this pallet, the orientation of the pallet can be discriminated by the operator by the hole portion, so that the workability in stacking a plurality of pallets while facing them can be improved.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, one of the tasks involved in transporting goods using pallets is inserting the two forks of a forklift into a pair of fork insertion holes in the pallet. Since this insertion of forks into the holes requires delicate operation by the worker, it is preferable to provide markers on the outer surface of the pallet, such as the intermediate beams, to assist in this insertion process.

[0006] However, in the pallet described in Patent Document 1 mentioned above, the markings provided on the outer surface of the pallet on the peripheral beam are small holes indicating the orientation of the pallet, and do not indicate information about the fork insertion holes, making them difficult to see, especially in dimly lit warehouses.

[0007] The present invention has been made in view of the above circumstances, and aims to provide a pallet and a pallet fork insertion assistance system that can provide workers with information regarding fork insertion holes by markings attached to the outer circumferential surface of the pallet on the peripheral beam. [Means for solving the problem]

[0008] One aspect of the present invention comprises a beam extending downward from a loading wall on which a load is placed, intersecting the loading wall; a peripheral beam of the beam, arranged along the periphery of the loading wall, with a pair of fork insertion holes provided on the outer pallet surface side, spaced apart in the left-right direction, and opening toward the outside of the pallet; and a mark portion attached to the outer pallet surface of the peripheral beam, which represents information relating to the fork insertion holes, wherein the mark portion is located on a central virtual line passing through the center of the fork insertion holes in the vertical direction, and has a horizontal axis portion capable of reflecting laser light emitted from a laser irradiation unit of a forklift. The peripheral beam with the mark portion is a synthetic resin pallet in which fork insertion holes are formed on each of the four sides of the square and rectangular pallet, and the peripheral beam with the mark portion is formed on at least one of the opposing pairs of sides, on one or both of the left and right sides of the fork insertion holes, and the pallet outer surface has a recessed portion provided on the inside or outside of the area with the mark portion in accordance with the mark portion, and a raised ridge portion provided linearly on the outside of the area on the outer surface of the pallet, protruding outward from the outer surface of the pallet.

[0009] One aspect of the present invention is a synthetic resin pallet comprising: a beam extending downward from a loading wall on which a load is placed, intersecting the loading wall; a pair of fork insertion holes provided on the outer pallet surface side of a peripheral beam, which is arranged along the periphery of the loading wall, spaced apart in the left-right direction, and opening toward the outside of the pallet; and the fork insertion holes being formed on all four sides of a square and rectangular pallet, with mark portions provided on the outer pallet surface of one or both of the peripheral beams on the left and right sides of at least one opposing pair of sides, each mark portion having a horizontal axis portion located on a central imaginary line passing through the center of the fork insertion holes in the vertical direction; an upper boundary portion located on an upper imaginary line connecting the upper ends of a pair of fork insertion holes; and a lower boundary portion located on a lower imaginary line connecting the lower ends of a pair of fork insertion holes.

[0010] One aspect of the present invention includes a beam extending downward from a loading wall on which a load is placed, intersecting the loading wall; a pair of fork insertion holes provided on the outer circumferential surface of a peripheral beam, which is positioned along the periphery of the loading wall, spaced apart in the left-right direction, and opening toward the outside of the pallet; and the fork insertion holes being formed on all four sides of a square and rectangular pallet, with mark portions provided on the outer circumferential surface of the peripheral beam on one or both sides of the fork insertion holes on at least one pair of opposing sides, respectively, and representing information about the fork insertion holes, wherein the mark portions are located in the vertical direction of the fork insertion holes. The synthetic resin pallet has a horizontal axis portion located on a central imaginary line passing through the center, an upper boundary portion located on an upper imaginary line connecting the upper ends of a pair of fork insertion holes, a lower boundary portion located on a lower imaginary line connecting the lower ends of a pair of fork insertion holes, and a vertical axis portion extending linearly in the vertical direction at the center in the left-right direction of the intermediate girder sandwiched between the pair of fork insertion holes of the peripheral girder, the peripheral girder is molded in black using recycled material, and the upper boundary portion and the lower boundary portion are formed at the boundary between the peripheral girder and the mark components attached to the peripheral girder in a color lighter than black.

[0011] One aspect of the present invention is a fork insertion assist system for a synthetic resin pallet for inserting forks of a forklift into the fork insertion holes of a pallet, the pallet comprising: a beam extending downward from a loading wall on which a load is placed and intersecting the loading wall; and a pair of fork insertion holes provided on the outer circumferential surface side of a peripheral beam arranged along the periphery of the loading wall, spaced apart in the left-right direction, and opening toward the outside of the pallet, wherein the pallet has the fork insertion holes formed on all four sides of a square or rectangular pallet, and at least one of a pair of opposing sides of the peripheral beam is attached to the outer circumferential surface of the pallet on one or both sides of the fork insertion holes, The forklift is equipped with a marking section that indicates information regarding the fork insertion hole, and the forklift is equipped with a laser irradiation section that irradiates laser light in accordance with the height position of the fork, and the marking section is located on a central virtual line passing through the center of the fork insertion hole in the vertical direction and has a horizontal axis section that can reflect the laser light, and the peripheral beam to which the marking section is attached has an uneven section provided on the outer peripheral surface of the pallet in accordance with the marking section, either inside or outside the area to which the marking section is attached, and a raised ridge provided linearly on the outer peripheral surface of the pallet outside the area and protruding outward from the outer peripheral surface of the pallet, wherein the fork insertion assist system for synthetic resin pallets is provided.

[0012] With these configurations, information regarding the fork insertion holes can be provided to the operator by markings on the outer surface of the pallet on the peripheral beam. [Brief explanation of the drawing]

[0013] [Figure 1] This is a perspective view of a pallet according to the first embodiment of the present invention. [Figure 2] This is a side view of the pallet according to the first embodiment. [Figure 3] This is an enlarged side view of the main part of the pallet of the first embodiment. [Figure 4] This diagram illustrates the density to be considered when constructing the mark portion to be attached to the outer circumferential surface of the intermediate beam pallet in the first embodiment. [Figure 5] It is a side view showing a state in which the pallets of the first embodiment are stacked in three layers. [Figure 6] It is a perspective view showing the front part including the fork in the forklift according to the second embodiment of the present invention. [Figure 7] It is a side view showing a state in which the laser light is irradiated on the pallet of the second embodiment. [Figure 8] It is a perspective view showing a state in which the laser light is irradiated on the pallet of the second embodiment. [Figure 9] It is an enlarged side view of the main part of the pallet according to the first modified form of the present invention. [Figure 10] It is an enlarged side view of the main part of the pallet according to the second modified form of the present invention. [Figure 11] It is an enlarged side view of the main part of the pallet according to the third modified form of the present invention. [Figure 12] It is an enlarged side view of the main part of the pallet according to the fourth modified form of the present invention. [Figure 13] It is an enlarged side view of the main part of the pallet according to the fifth modified form of the present invention. [Figure 14] It is an enlarged side view of the main part of the pallet according to the sixth modified form of the present invention.

Embodiments for Carrying out the Invention

[0014] Hereinafter, referring to FIGS. 1 to 14, specific embodiments and modified forms of the synthetic resin pallet and the fork insertion assisting system for the synthetic resin pallet according to the present invention will be described.

[0015] [Embodiment 1] The pallet 10 of the first embodiment of the present invention is a loading platform used for carrying loads. The pallet 10 can be moved together with the load placed thereon by a forklift operated by an operator. The pallet 10 is used for storing and loading loads into a warehouse, a truck, or a container.

[0016] The pallet 10 is formed mainly of a synthetic resin. However, the pallet 10 is not limited to being made of a synthetic resin and may be formed mainly of a metal or the like. Hereinafter, it is assumed that the pallet 10 is made of a synthetic resin. In addition, when the pallet 10 is made of a synthetic resin, the synthetic resin is composed of recycled materials, and the pallet 10 may be molded using the recycled materials. When the pallet 10 is molded using recycled materials, the color of the pallet 10 is generally a dark black with low brightness.

[0017] Also, the pallet 10 may be an integrally molded product, or may be integrated by welding or the like of a plurality of parts. In addition, when the pallet 10 is integrated by welding two parts divided in the vertical direction, for example, the mark portion 60 described later has a configuration that can be divided into an upper part side and a lower part side as shown in FIGS. 9 and 12, which is preferable for manufacturing the pallet 10 without impairing the appearance of the mark portion 60.

[0018] The pallet 10 is, for example, a flat pallet formed in a flat plate shape. The pallet 10 is formed in a square shape or a rectangular shape surrounded by four sides in a plan view. The pallet 10 can be stacked on the upper surface side of the same-shaped pallet 10, and the same-shaped pallet 10 can be stacked on the upper surface side of the self-pallet 10.

[0019] As shown in FIG. 1, the pallet 10 includes a mounting wall 20, a girder 30, a support beam 40, a fork insertion hole 50, and a mark portion 60.

[0020] The mounting wall 20 is a wall portion on which a load is mounted. The surface of the mounting wall 20 extends horizontally upward so that a load can be mounted when the pallet 10 is placed horizontally on the ground. The surface of the mounting wall 20 is formed in a square shape or a rectangular shape as a whole. The mounting wall 20 is formed with a plate thickness according to the material so as to have a predetermined load-bearing capacity. The mounting wall 20 is formed in a mesh shape by, for example, crossbars or beams.

[0021] Grommets are provided on the surface of the mounting wall 20 to prevent slipping. The grommets are attached to predetermined locations on the surface of the mounting wall 20. The surface of the mounting wall 20 may also be provided with protrusions or recesses for positioning or preventing misalignment when other pallets 10 of the same shape are stacked on top of it.

[0022] In the following, when describing the direction of the pallet 10, the reference point will be the state in which the pallet 10 is ready to load. That is, regardless of the state of the pallet 10, for example, the direction in which the surface of the loading wall 20 faces will be considered upward, and the direction in which the back surface of the loading wall 20 faces will be considered downward.

[0023] Furthermore, a single pallet 10 may have only one loading wall 20 so that loads can be placed on only one surface, either the top or bottom, or it may have a pair of loading walls 20 so that it can be used upside down. Figure 1 shows a pallet 10 with only one loading wall 20.

[0024] The girder 30 is a leg for supporting the mounting wall 20. The girder 30 extends downward from the mounting wall 20, intersecting the mounting wall 20. The girder 30 is provided on the back side of the mounting wall 20. The girder 30 is formed in a columnar or cylindrical shape. The girder 30 is provided in, for example, nine locations on the back side of the mounting wall 20. The girder 30 has a peripheral girder 30R arranged along the periphery of the mounting wall 20 and a central girder located at the center of the mounting wall 20. The peripheral girder 30R extends downward from the periphery of the mounting wall 20. The peripheral girder 30R may be formed integrally with the mounting wall 20, or it may be configured to extend downward from a location on the pallet-inward side of the periphery of the mounting wall 20, creating a step relative to the periphery of the mounting wall 20. The outer pallet surface of the peripheral girder 30R faces outward from the pallet 10.

[0025] Multiple peripheral girders 30R are provided so as to divide the peripheral edge of the mounting wall 20 into multiple sections when viewed from below the pallet 10. On the side of the pallet 10 where the fork insertion holes 50 are not provided, one peripheral girder 30R is arranged to extend in the left-right direction along the peripheral edge of the mounting wall 20.

[0026] On the other hand, on the side of the pallet 10 where the fork insertion holes 50 are provided, the peripheral girders 30R are arranged such that three peripheral girders 30R are arranged in parallel in the left-right direction along the periphery of the mounting wall 20. Each of these three peripheral girders 30R is formed to have a predetermined width (for example, 15 cm to 30 cm) in the left-right direction perpendicular to the vertical direction of the mounting wall 20. As shown in Figures 1, 2, and 3, these three peripheral girders 30R include left and right girders 31 and 32 located at both ends in the left-right direction, and an intermediate girder 33 located in the center in the left-right direction.

[0027] The left and right girders 31 are girders located on the left side when viewed from the outside of the pallet on the side of the pallet 10 where the fork insertion holes 50 are provided, and the left and right girders 32 are girders located on the right side when viewed from the outside of the pallet on the side of the pallet 10 where the fork insertion holes 50 are provided. The left and right girders 31 and 32 are girders positioned at each of the four corners of the pallet 10. For example, the left and right girders 31 may be located on the left side when viewed from the outside of the pallet on one side of the pallet 10, and the left and right girders 32 may be located on the right side when viewed from the outside of the pallet on the other side of the pallet 10.

[0028] The intermediate girder 33 is located in the left-right center when viewed from the outside of the pallet on the side of the pallet 10 where the fork insertion holes 50 are provided, and is positioned between the left left girder 31 and the right left girder 32. In each girder 30, including the pair of left and right girder 31, 32 and the intermediate girder 33, the vertical lengths from the upper end on the mounting wall 20 side to the lower end on the opposite side, that is, the height positions of the lower ends opposite to the upper end on the mounting wall 20 side, are the same. Each girder 30, including the pair of left and right girder 31, 32 and the intermediate girder 33, is configured so that their lower end surfaces are flush.

[0029] The support beams 40 are beam members that connect the girders 30 together. The support beams 40 are arranged so that, when viewed from below the pallet 10, the entire pallet 10, including the girders 30, forms a grid pattern. The support beams 40 are provided to connect, for example, the left and right girders 31, 32 to the intermediate girder 33, or to connect the intermediate girder 33 to the central girder. The support beams 40 are formed integrally with the lower ends of the girders 30. The support beams 40 have the role of preventing deformation of the girders 30, especially the lower ends, due to the weight of the load, etc.

[0030] The fork insertion holes 50 are holes into which the forks of a forklift used to move the pallet 10 are inserted. The fork insertion holes 50 are provided on at least two of the four sides of the peripheral beam 30R that face outward from the pallet, i.e., the sides of the pallet 10 that face outward. The fork insertion holes 50 open outward from the pallet 10 so that the forks of the forklift can be inserted.

[0031] The fork insertion holes 50 are provided in pairs on the side surface of the pallet 10 on which the fork insertion holes 50 are located, separated in the left-right direction. The fork insertion holes 50 are provided in pairs on both sides in the left-right direction on the outer circumferential surface of the pallet on the peripheral girder 30R, with the intermediate girder 33 in between. Each fork insertion hole 50 is formed in a rectangular shape so as to be enclosed by the mounting wall 20, the left and right girders 31, 32, the support beam 40, and the intermediate girder 33. Each fork insertion hole 50 has an opening area larger than the cross-sectional area of ​​the forks of a forklift. The pair of fork insertion holes 50 are located at the same height from each other, with the intermediate girder 33 in between.

[0032] Furthermore, the fork insertion hole 50 may be formed with an inclined surface such that the hole area gradually increases from the rear side, which is the inner side of the pallet, to the opening side, which is the outer side of the pallet. This configuration makes it easier to insert the forks of a forklift into the fork insertion hole 50. In addition, in this configuration including an inclined surface, the left and right inclined surfaces and the upper and lower inclined surfaces may be colored in a way that distinguishes them from the basic color of the pallet 10, or they may have a different brightness or hue from the body of the pallet 10. With this configuration, the periphery of the fork insertion hole 50 becomes visible and distinguishable from other parts, so that it is even easier to insert the forks of a forklift into the fork insertion hole 50.

[0033] The mark portion 60 is a marking attached to the outer circumferential surface of the pallet facing outward from the peripheral girder 30R, and is particularly visible to forklift operators. Furthermore, it is preferable for the mark portion 60 to be attached to the outer circumferential surface of the intermediate girder 33 of the peripheral girder 30R in order to improve visibility to operators. The mark portion 60 is constructed by printing, attaching, or mounting a mark component 61, such as a seal, label, or panel part, to the outer circumferential surface of the pallet of the peripheral girder 30R, or by cutting out a corresponding portion of the outer circumferential surface of the pallet of the peripheral girder 30R, or by performing two-color molding or insert molding on the outer circumferential surface of the pallet of the peripheral girder 30R. The position and shape of the mark portion 60 relative to the outer circumferential surface of the pallet of the peripheral girder 30R are specified.

[0034] Furthermore, it is preferable that the peripheral beam 30R with the mark portion 60 is formed on one or both sides of all the fork insertion holes 50. Specifically, when fork insertion holes 50 are formed on each of the four sides of a square or rectangular pallet (four-way pallet), or when fork insertion holes 50 are formed on only one of two opposing sides of the four sides of a square or rectangular pallet (two-way pallet), the peripheral beam 30R on one or both sides of all the fork insertion holes 50 is marked with the mark portion 60. With this configuration, the pallet 10 can be visually identified without having to worry about its orientation.

[0035] When fork insertion holes 50 are formed on each of the four sides of a square or rectangular pallet (a four-way pallet), it is preferable that markings 60 are provided on one or both of the peripheral beams 30R on the left and right sides of the fork insertion holes 50 on only one of the opposing pairs of sides. In this case, it is preferable that the markings 60 are provided on the peripheral beams 30R on the longer side of the rectangular pallet. With this configuration, the pallet 10 can be visually identified without having to worry about its orientation.

[0036] Furthermore, when fork insertion holes 50 are formed on all four sides of a square or rectangular pallet (four-way entry pallet), or when fork insertion holes 50 are formed on only one of two opposing sides of a square or rectangular pallet (two-way entry pallet), it is preferable that mark portions 60 are provided on one or both of the peripheral beams 30R on the left and right sides of the fork insertion hole 50 on one side.

[0037] Furthermore, it is preferable that the outer surface of the pallet's peripheral beam 30R be smooth in order to improve the visibility of the mark portion 60. Also, the mark portion 60 may be made of a reflector that easily reflects light in order to improve its visibility. With this reflector, for example, when the pallet 10 is moved by a forklift that uses laser light to visualize the tips of the forks, the laser light will be easily reflected by the mark portion 60, making it easier for the operator to recognize the mark portion 60. A system for assisting the operator's work of inserting the forks of the forklift into the fork insertion holes 50 using laser light will be described in the second embodiment described later.

[0038] Hereinafter, the mark portion 60 is defined by the relative positional relationship between the outer circumferential surface of the intermediate girder 33 of the peripheral girder 30R and the mark component 61. The mark portion 60 is formed, for example, by printing, attaching, or mounting the mark component 61 to a predetermined location on the outer circumferential surface of the intermediate girder 33 of the pallet after the pallet 10 has been formed to include the mounting wall 20, girder 30, support beam 40, and fork insertion hole 50.

[0039] Furthermore, if the pallet 10 is made of synthetic resin, it is preferable that there are no connection points with ribs or partition walls formed on the inner side of the pallet on the back surface of the intermediate beam 33 opposite to the outer surface of the pallet where the mark components 61 are printed. This is to prevent sink marks from occurring on the outer surface of the intermediate beam 33 due to resin shrinkage during the molding of the pallet 10, and to prevent deformation of the mark components 61.

[0040] An uneven surface 35 may be formed on the outer circumferential surface of the pallet on which the mark components 61 on the intermediate beam 33 are printed. This uneven surface 35 is provided in accordance with the mark portion 60, specifically, in accordance with the position of the mark components 61. The uneven surface 35 is provided on the inner or outer side of the area on the outer circumferential surface of the pallet on which the mark portion 60 is attached (i.e., the area inside the outer edge that encompasses all of the mark components 61 and surrounds the entire mark portion 60). The uneven surface 35 may be a fine uneven surface such as a textured or matte finish. With this uneven surface 35, as in the second embodiment described later, when the laser light emitted from the laser irradiation unit of the forklift is reflected off the mark portion 60, the light is more easily diffused, making it easier for the operator to visually recognize the mark portion 60 that is reflected by the laser light.

[0041] Furthermore, the uneven portion 35 may include recesses formed by the sink marks at connection points with ribs (see ribs 70 described later) and partition walls provided on the inner side of the pallet outer surface. With this configuration, the mark portion 60 can be formed on the outer surface of the pallet of the intermediate beam 33, taking into account the effects of the sink marks.

[0042] Furthermore, a raised ridge 36 may be formed on the outer circumferential surface of the pallet on which the mark components 61 on the intermediate beam 33 are printed. This raised ridge 36 is provided linearly on the outside of the area on the outer circumferential surface of the pallet on which the mark portion 60 is attached (i.e., the area inside the outer edge that encompasses all of the mark components 61 and surrounds the entire mark portion 60), and protrudes outward from the outer circumferential surface of the pallet.

[0043] The raised ridge portion 36 may be formed only on a portion of the outer edge of the pallet outer surface of the intermediate beam 33 (for example, the upper and lower edges). This configuration of the raised ridge portion 36 prevents the pallet outer surface of the intermediate beam 33, on which the mark components 61 are printed, from easily coming into contact with the sides of other pallets 10, thereby preventing the pallet outer surface of the intermediate beam 33 and, consequently, the mark components 61 from being scraped.

[0044] Furthermore, the outer circumferential surface of the pallet of the intermediate beam 33 on which the markings 61 are printed may have a recess formed in which the entire portion on which the markings 61 are printed is recessed compared to other parts. This recess configuration can prevent the markings 61 from easily coming into contact with the sides of other pallets 10, and can prevent the markings 61 from being worn down.

[0045] The mark portion 60 represents information related to the fork insertion hole 50. Specifically, the mark portion 60 includes information indicating the height position of the upper end of the fork insertion hole 50, the height position of the lower end of the fork insertion hole 50, the left-right center position of the pair of left and right fork insertion holes 50, and the vertical center position of the fork insertion hole 50.

[0046] As shown in Figure 3, the mark portion 60 has an upper boundary portion 62 indicating the height position of the upper end of the fork insertion hole 50, and a lower boundary portion 63 indicating the height position of the lower end of the fork insertion hole 50. Both the upper boundary portion 62 and the lower boundary portion 63 are formed at the boundary between the mark component 61 and the outer circumferential surface of the pallet of the intermediate beam 33, and are the parts that appear at that boundary position.

[0047] In this embodiment, the mark component 61 is a printed material in which the cross-shaped portion is drawn in a wide typeface, and has a brightness or hue that is visually distinguishable from the outer periphery surface of the intermediate column 33.

[0048] For example, as shown in Figures 1 to 5, when the outer periphery of the intermediate beam 33 is designed with a bright white color, the mark component 61 is designed with a dark black color. In this case, it is preferable that the colored portion of the mark component 61 has an area of ​​2 / 5 to 4 / 5 of the area of ​​the uncolored portion, and more preferably 3 / 5 to 4 / 5.

[0049] Conversely, when the mounting wall 20 and the beam 30 are molded using recycled materials in a low-luminosity black color, and the outer periphery of the intermediate beam 33 is designed in a low-luminosity black color, the mark component 61 is designed in a high-luminosity white color and attached to the outer periphery of the intermediate beam 33. In this configuration, for example, the luminosity (L) of the beam 30 is in the range of 0 to 40, preferably in the range of 10 to 35, and more preferably in the range of 10 to 30, while the luminosity (L) of the mark component 61 is in the range of 50 to 100, preferably in the range of 55 to 98, and more preferably in the range of 60 to 95. The hue (a,b) of the mark component 61 is not zero and is in the range of -40 to +30.

[0050] Furthermore, in order to improve the visibility of the mark portion 60, it is preferable that there are no other distinguishing features on the outer circumferential surface of the intermediate girder 33 other than the mark component 61, which consists of a cross shape. The mark component 61 can be seen as the cross shape stands out against the background of the outer circumferential surface of the intermediate girder 33.

[0051] The upper boundary portion 62 is located on the upper imaginary line UL, which connects the upper ends of a pair of fork insertion holes 50 located on either side of the intermediate beam 33. The upper boundary portion 62 extends linearly in the left-right direction with the upper imaginary line UL as the boundary line. The upper boundary portion 62 is formed on the portion of the cross-shaped part of the mark component 61 where the upper edge of the width portion extending in the left-right direction of the vertical line portion occupies the outer circumferential surface of the pallet of the intermediate beam 33. It is preferable that the upper boundary portion 62 and the upper edge of the vertical line portion of the mark component 61 coincide with the upper imaginary line UL, but they may be offset from the upper imaginary line UL as long as it is within a predetermined distance (for example, 9 mm).

[0052] Furthermore, the lower boundary portion 63 is located on a lower imaginary line DL that connects the lower ends of a pair of fork insertion holes 50 located on either side of the intermediate beam 33. The lower boundary portion 63 extends linearly in the left-right direction with the lower imaginary line DL as the boundary line. The lower boundary portion 63 is formed in the portion of the cross-shaped part of the mark component 61 where the lower end edge of the width portion extending in the left-right direction of the vertical line portion occupies the outer circumferential surface of the pallet of the intermediate beam 33. It is preferable that the lower boundary portion 63 and the lower end edge of the vertical line portion of the mark component 61 coincide with the lower imaginary line DL, but they may be offset from the lower imaginary line DL as long as it is within a predetermined distance (for example, 9 mm).

[0053] The mark portion 60 also has a vertical axis portion 64 indicating the left-right center position of the pair of left and right fork insertion holes 50, and a horizontal axis portion 65 indicating the vertical center position of the fork insertion holes 50, as shown in Figure 3. The vertical axis portion 64 is located in the left-right center of the intermediate girder 33. The vertical axis portion 64 extends linearly along the vertical direction. The vertical axis portion 64 is indicated using the vertical line portion of the cross-shaped portion of the mark component 61. The horizontal axis portion 65 is located on the central imaginary line CL that passes through the vertical center of the fork insertion holes 50 in the intermediate girder 33. The horizontal axis portion 65 extends linearly along the left-right direction. The horizontal axis portion 65 is indicated using the horizontal line portion of the cross-shaped portion of the mark component 61.

[0054] Furthermore, it is preferable that the mark portion 60 is formed symmetrically on both the left-right and up-down sides on the outer circumferential surface of the pallet of the intermediate girder 33, but it may also be symmetrical on both the left-right and up-down sides on the outer circumferential surface of the pallet of the intermediate girder 33, but asymmetrical up-down. In addition, the boundary portions of the mark portion 60 (i.e., the upper boundary portion 62, the lower boundary portion 63, the vertical axis portion 64, and the horizontal axis portion 65) may be formed as solid or dashed lines extending linearly, but they may also be formed as points.

[0055] The mark portion 60 is formed such that, for example, the outer pallet surface of the intermediate beam 33 facing outward from the pallet is divided into nine sections, and when the upper and lower central sections and the left and right central sections including the center 33c of the outer pallet surface are densely (darkly) colored, the corners of the outer pallet surface are sparsely (lightly) colored (see Figure 4(A)), and when the upper and lower central sections and the left and right central sections including the center 33c of the outer pallet surface are sparsely (lightly) colored, the corners of the outer pallet surface are densely (darkly) colored (see Figure 4(B)). In this embodiment, the mark portion 60 is formed such that the upper and lower central sections and the left and right central sections including the center 33c of the outer pallet surface are densely (darkly) colored, and the corners of the outer pallet surface are sparsely (lightly) colored.

[0056] Furthermore, the mark portion 60 is positioned at the vertical center of the outer circumferential surface of the pallet of the intermediate girder 33, or slightly below the vertical center. That is, as shown in Figure 3, the mark portion 60 is formed such that the distance X between the upper end of the mark portion 60 (e.g., the upper boundary portion 62) and the upper end of the pallet 10 (e.g., the upper end of the outer circumferential surface of the pallet of the intermediate girder 33) is greater than or equal to the distance Y between the lower end of the mark portion 60 (e.g., the lower boundary portion 63) and the lower end of the pallet 10 (e.g., the lower end of the outer circumferential surface of the pallet of the intermediate girder 33).

[0057] Furthermore, the mark portion 60 is positioned at the left-right center of the outer circumferential surface of the pallet of the intermediate girder 33. As shown in Figure 3, the mark portion 60 is formed such that the distance X between the upper end of the mark portion 60 and the upper end of the pallet 10 is greater than the distance Z between the left and right ends of the mark portion 60 and the left and right ends of the outer circumferential surface of the pallet of the intermediate girder 33.

[0058] In this embodiment, the pallet 10 has a mark portion 60 attached to the outer circumferential surface of the intermediate beam 33 that represents information about the fork insertion holes 50. Specifically, it has an upper boundary portion 62 located on an upper imaginary line UL connecting the upper ends of a pair of fork insertion holes 50, and a lower boundary portion 63 located on a lower imaginary line DL connecting the lower ends of a pair of fork insertion holes 50. With this configuration, the upper boundary portion 62 of the mark portion 60 makes it easier for the worker to visually recognize the height position of the upper end of the fork insertion hole 50, and the lower boundary portion 63 of the mark portion 60 makes it easier for the worker to visually recognize the height position of the lower end of the fork insertion hole 50.

[0059] Therefore, the mark portion 60 can be used as a guide to provide workers with a reference point for inserting the forks of the forklift into the fork insertion hole 50, thereby reducing the workload on the workers. In particular, since the mark portion 60 has a size (height) that corresponds to the vertical height of the fork insertion hole 50, it is easy to see even in dimly lit warehouses, and it is possible to reliably provide workers with the above-mentioned reference point for inserting the forks.

[0060] Furthermore, in the pallet 10, the mark portion 60 has a vertical axis portion 64 that extends linearly along the vertical direction at the center in the left-right direction of the outer circumferential surface of the pallet of the intermediate beam 33. Since this vertical axis portion 64 indicates the left-right center position of the pair of left and right fork insertion holes 50, it is possible to make it easier for the worker to visually recognize the left-right center of the pair of left and right fork insertion holes 50. Therefore, this vertical axis portion 64 can provide an additional guide for inserting the forks of a forklift into the fork insertion holes 50, thereby further reducing the workload.

[0061] Furthermore, with the configuration in which a vertical axis section 64 is provided as a mark section 60, for example, as shown in Figure 5, when the same pallet 10 is stacked in multiple layers, the forklift operation can be performed so that the pallets are connected in a straight line vertically using the vertical axis section 64 of each pallet 10 as a guide, thereby assisting in the stacking work of the pallets 10 and making it easier to stack the pallets 10 in a straight line vertically.

[0062] Furthermore, in the pallet 10, the mark portion 60 has a horizontal axis portion 65 that extends linearly along the left-right direction on a central imaginary line CL that passes through the vertical center of the fork insertion hole 50 on the outer circumferential surface of the pallet of the intermediate beam 33. Since this horizontal axis portion 65 indicates the vertical center position of the fork insertion hole 50, it is possible to make it easier for the worker to visually recognize the vertical center of the fork insertion hole 50. Therefore, this horizontal axis portion 65 can provide an additional guide for inserting the forks of a forklift into the fork insertion hole 50, thereby further reducing the workload.

[0063] [Embodiment 2] The pallet 10 of the second embodiment of the present invention is applied to a pallet fork insertion assist system that uses laser light to assist an operator in inserting forklift forks into fork insertion holes 50. In this embodiment, the same reference numerals are used for members and parts as in the first embodiment described above, and their descriptions are omitted or simplified.

[0064] The pallet fork insertion assist system of this embodiment comprises a pallet 10 and a forklift 90. In this embodiment, the pallet 10 comprises a beam 30, fork insertion holes 50, and a marking portion 60. The marking portion 60 includes at least a horizontal axis portion 65 located on a central imaginary line CL passing through the center of the fork insertion holes 50 in the vertical direction, and is formed, for example, in a cross shape. The horizontal axis portion 65 is composed of a marking component 61, which is a reflector capable of reflecting laser light L emitted from the forklift 90. The entire marking component 61, including the horizontal axis portion 65, may be made of a material that easily reflects laser light L from the forklift 90.

[0065] The forklift 90 is a vehicle operated by a worker to move the pallet 10. As shown in Figure 6, the forklift 90 is equipped with forks 91 and a laser irradiation unit 92. The forks 91 are mounted on the front of the forklift 90 and are mainly capable of moving in the vertical direction. The forks 91 are provided in pairs, spaced apart from each other in the left-right direction, at the front of the forklift 90.

[0066] The laser irradiation unit 92 is the part that irradiates laser light L toward the front of the forklift 90. The laser light L emitted from the laser irradiation unit 92 is, for example, red light with a wavelength of 630 nm to 690 nm or green light with a wavelength of 510 nm to 550 nm. This laser light L is formed to extend linearly in the left-right direction relative to the forklift 90. The laser irradiation unit 92 irradiates the laser light L at a height position that matches the fork 91 (especially its tips).

[0067] The laser irradiation unit 92 is positioned approximately midway between the left fork 91 and the right fork 91 of the forklift 90. The laser irradiation unit 92 is positioned at approximately the same height as the fork 91 of the forklift 90, and irradiates laser light L horizontally from that height. The laser irradiation unit 92 is installed at a point where it moves up and down in synchronization with the raising and lowering of the fork 91. The laser irradiation unit 92 is, for example, a laser pointer using a semiconductor laser.

[0068] When the laser beam L emitted from the laser irradiation unit 92 strikes the horizontal axis portion 65 of the pallet 10, the laser beam L is reflected at the horizontal axis portion 65. This reflection of the laser beam L is accompanied by diffusion, fluctuation, and swelling of the light. As a result, the operator of the forklift 90 can see the horizontal axis portion 65 of the pallet 10 as wider than its actual dimensions, making it easier to see the horizontal axis portion 65.

[0069] [Table 1]

[0070] Furthermore, when the reflectance (%) and absorptive rate (%) of each color of the reflector were measured when red light with a wavelength of 630 nm to 690 nm was irradiated as laser light L, the results shown in Table 1 above were obtained. When red light is irradiated from the laser irradiation unit 92, the reflectance of the reflector is 50% or more and the absorptive rate is less than 50% to make the laser light L reflected by the reflector more visible to the worker. Moreover, in order to make the laser light L reflected by the reflector more easily recognizable to the worker even from a distance, it is preferable that the reflectance of the reflector is 60% or more and the absorptive rate is less than 40%. In this regard, when the laser irradiation unit 92 that irradiates red light is mounted on the forklift 90, it is preferable that the upper boundary portion 62, lower boundary portion 63, vertical axis portion 64, and horizontal axis portion 65 of the mark portion 60 be applied to the peripheral girder 30R with a high brightness of white or yellow. In particular, in the case of a pallet 10 in which the peripheral girder 30R is molded in a low-luminosity black color, it is preferable that the mark portion 60 is white and applied to the peripheral girder 30R.

[0071] In the pallet fork insertion assistance system of this embodiment, the operator of the forklift 90 moves the forklift 90 and, consequently the forks 91, so that the laser beam L extending in the left-right direction, emitted from the laser irradiation unit 92, strikes the horizontal axis portion 65 of the mark portion 60 when inserting the forks 91 into the fork insertion holes 50 of the pallet 10. When the laser beam L from the laser irradiation unit 92 strikes the horizontal axis portion 65, the laser beam L is reflected, making the horizontal axis portion 65 easier for the operator to see. When the laser beam L strikes the horizontal axis portion 65, the reflection intensity of the laser beam L is stronger than when the laser beam L strikes a part of the outer circumferential surface of the pallet other than the mark portion 60 on the peripheral girder 30R. As a result, the laser beam L that the operator sees appears wider than its actual dimensions.

[0072] Since the horizontal axis section 65 is located on a central virtual line CL that passes through the vertical center of the fork insertion hole 50 in the intermediate girder 33, when the laser beam L from the laser irradiation unit 92 strikes the horizontal axis section 65, the height position of the forks 91 of the forklift 90 approximately coincides with the vertical center position of the fork insertion hole 50 of the pallet 10. Therefore, when the laser beam L from the laser irradiation unit 92 strikes the horizontal axis section 65, and the forklift 90 moves forward towards the pallet 10 while maintaining the height position of the forks 91, the forks 91 will be reliably inserted into the fork insertion hole 50.

[0073] Therefore, according to the configuration of this embodiment, the horizontal axis portion 65 of the mark portion 60 is made capable of reflecting a predetermined laser beam, and the laser beam is emitted from the laser irradiation unit 92 of the forklift 90 to match the height position of the fork 91. As a result, the horizontal axis portion 65 passing through the vertical center of the fork insertion hole 50 can be easily visually recognized by the laser beam from the laser irradiation unit 92.

[0074] In particular, even with pallets 10 placed in dark areas, or with multiple pallets 10 stacked on top of each other, where the lighting from the forklift 90 is difficult to reach, the laser beam from the laser irradiation unit 92 makes the horizontal axis 65 easily visible to the operator. When the horizontal axis 65 is easily visible to the operator, the height of the forks 91 of the forklift 90 coincides approximately with the vertical center of the fork insertion hole 50 of the pallet 10. At this point, the operator can simply move the forklift 90 forward, and the forks 91 will be inserted into the fork insertion hole 50.

[0075] Therefore, the horizontal axis portion 65 of the mark portion 60 can be used as a guide to provide the worker with a reference point for inserting the forks 91 of the forklift 90 into the fork insertion hole 50, thereby reducing the workload on the worker.

[0076] [Transformation Form 1] In the above embodiment, the mark portion 60 is formed by printing a mark component 61 on the outer circumferential surface of the pallet of the intermediate girder 33, and the mark component 61 has a brightness or hue that is visually distinguishable from the outer circumferential surface of the pallet of the intermediate girder 33. Furthermore, the mark component 61 itself has a portion corresponding to the vertical axis portion 64 of the mark portion 60, as shown in Figure 3, and a portion corresponding to the horizontal axis portion 65 of the mark portion 60.

[0077] However, the present invention is not limited thereto, and as shown in Figure 9, the vertical axis portion 64 and the horizontal axis portion 65 of the mark portion 60 may be displayed inverted relative to the above embodiment, specifically, they may be designed in white relative to the intermediate girder 33 and have the same brightness and hue as the outer pallet surface of the intermediate girder 33. In this case, the mark component 61 may be colored with a brightness or hue that is visually distinguishable relative to the outer pallet surface of the intermediate girder 33, and may be printed on a different part of the outer pallet surface of the intermediate girder 33 from the vertical axis portion 64 and the horizontal axis portion 65 of the mark portion 60 so that they appear to stand out. The mark component 61 may be composed of four rectangles so that the vertical axis portion 64 and the horizontal axis portion 65 appear, and the four rectangles may be arranged with gaps between them so that a cross is formed by the vertical axis portion 64 and the horizontal axis portion 65.

[0078] In this modified form 1, the upper boundary portion 62 and the lower boundary portion 63 are formed at the boundary between the mark component 61 and the outer pallet surface of the intermediate girder 33, and the vertical axis portion 64 extends linearly along the left-right direction on the central virtual line CL of the intermediate girder 33, and the horizontal axis portion 65 extends linearly along the up-down direction at the center of the intermediate girder 33 in the left-right direction, so that the same effects as in the above embodiment can be obtained.

[0079] Furthermore, this modified form 1 is preferably applied to a configuration in which the pallet 10 is made of synthetic resin and ribs 70 (see Figure 9) are provided on the back side of the intermediate girder 33 facing inward, opposite to the outer pallet surface facing outward. These ribs 70 may be formed to extend linearly along the vertical direction at the center of the intermediate girder 33 in the left-right direction, or to extend linearly along the left-right direction at the center of the intermediate girder 33 in the vertical direction. With this configuration, sink marks occur in the areas of the outer pallet surface of the intermediate girder 33 where the vertical axis portion 64 or the horizontal axis portion 65 is designed in white, making it possible to prevent deformation of the mark component 61.

[0080] [Transformation Form 2] Furthermore, in the above embodiment, the type of mark component 61 used is a printed material in which the cross-shaped portion is drawn in a wide typeface. However, the present invention is not limited to this, and as shown in Figure 10, the type of mark component 61 may also be a printed material in which three line segments drawn in a wide typeface extending in the left-right direction are arranged in parallel with spacing in the vertical direction.

[0081] In this modified form 2, the upper boundary portion 62 and the lower boundary portion 63 are formed at the boundary between the upper end of the upper line segment or the lower end of the lower line segment of the mark component 61 and the outer circumferential surface of the pallet of the intermediate beam 33, and the horizontal axis portion 65 is indicated by the central line segment in the vertical direction of the mark component 61, so that the same effects as in the above embodiment can be obtained.

[0082] [Transformation Form 3] In the above modified form 2, the mark portion 60 does not have a vertical axis portion 64. However, the present invention is not limited to this, and the mark portion 60 may have a vertical axis portion 64. In this modified form 3, as shown in Figure 11, the type of mark component 61 may be such that each of the three line segments extending in the left-right direction has a gap in the center in the left-right direction so that the vertical axis portion 64 appears. In this modified form 3, the vertical axis portion 64 that penetrates vertically through the center in the left-right direction of the three line segments extending in the left-right direction appears on the outer circumferential surface of the pallet of the intermediate girder 33, so the same effects as in the above embodiment can be obtained.

[0083] [Transformation Form 4] In the above modified form 1, the mark component 61 is colored and designed to have a brightness or hue that is visually distinguishable from the outer pallet surface of the intermediate girder 33, and is printed or affixed to a part of the outer pallet surface of the intermediate girder 33 that is different from the vertical axis portion 64 and horizontal axis portion 65 of the mark portion 60, so that the vertical axis portion 64 and horizontal axis portion 65 of the mark portion 60 appear to stand out. The mark component 61 is composed of four rectangles so that the vertical axis portion 64 and horizontal axis portion 65 are visible, and the four rectangles are arranged with gaps between them.

[0084] However, the present invention is not limited thereto, and as shown in Figure 12, the marking component 61 may be composed of four right-angled isosceles triangles such that a vertical axis portion 64 and a horizontal axis portion 65 are visible, and the four right-angled isosceles triangles may be arranged with gaps between them. In this modified form 4, the imaginary line connecting the upper vertices of the two upper right-angled isosceles triangles becomes the upper imaginary line UL, and the imaginary line connecting the lower vertices of the two lower right-angled isosceles triangles becomes the lower imaginary line DL, and the vertical axis portion 64 and the horizontal axis portion 65 appear on the outer circumferential surface of the pallet of the intermediate beam 33, so that the same effects as in the above embodiment can be obtained.

[0085] Furthermore, the mark component 61 may be composed of two right-angled isosceles triangles separated vertically or horizontally, with gaps between the two right-angled isosceles triangles. Alternatively, the mark component 61 may be composed of a rhombus.

[0086] [Transformation form 5 and transformation form 6] Furthermore, in the above embodiment, the mark portion 60 attached to the outer circumferential surface of the pallet of the intermediate beam 33 has an upper boundary portion 62 and a lower boundary portion 63, as well as a vertical axis portion 64 and a horizontal axis portion 65. However, the present invention is not limited thereto, and as shown in Figures 13 and 14, an additional mark 69 such as the name of the company that owns or uses the pallet 10 or a company logo may be attached to the center of the mark portion 60, etc., to the extent that it does not impair the display of the upper boundary portion 62, the lower boundary portion 63, the vertical axis portion 64, and the horizontal axis portion 65. In these modified forms 5 and 6, the same effects as in the above embodiment can be obtained while informing the outside of the owner or user of the pallet 10.

[0087] Furthermore, in the above embodiment, the mark portion 60 is attached to the intermediate girder 33. However, the present invention is not limited thereto, and the mark portion 60 may also be attached to the left and right girders 31 and 32.

[0088] Furthermore, the present invention is not limited to the embodiments and modifications described above, and various modifications can be made without departing from the spirit of the invention. In addition, this specification not only discloses the technical concept indicated by the reference relationships described in each claim at the time of filing, but also discloses a technical concept that appropriately combines the matters described in each claim. [Explanation of Symbols]

[0089] 10: Pallet, 20: Mounting wall, 30: Girder, 30R: Peripheral girder, 31, 32: Left and right girders, 33: Intermediate girder, 35: Uneven section, 36: Raised section, 40: Support beam, 50: Fork insertion hole, 60: Marked section, 61: Marked component, 62: Upper boundary section, 63: Lower boundary section, 64: Vertical axis section, 65: Horizontal axis section, 70: Rib, 90: Forklift, 91: Fork, 92: Laser irradiation section, UL: Upper virtual line, DL: Lower virtual line, CL: Central virtual line.

Claims

1. A beam extending downward from the mounting wall on which the load is placed, intersecting the aforementioned mounting wall, Among the girders, the peripheral girders arranged along the periphery of the aforementioned support wall are provided in pairs on the outer surface side of the pallet, spaced apart in the left-right direction, with fork insertion holes that open outwards from the pallet, A mark portion is attached to the outer circumferential surface of the pallet of the peripheral beam, and represents information relating to the fork insertion hole, Equipped with, The mark portion is located on a central virtual line passing through the center of the fork insertion hole in the vertical direction, and has a horizontal axis portion capable of reflecting laser light emitted from the laser irradiation unit of the forklift. The peripheral girder on which the mark portion is attached is On each of the four sides of the square and rectangular pallets, the fork insertion holes are formed on at least one of two opposing sides, and on one or both sides of the fork insertion holes, Fork insertion holes are formed on each of the four sides of the square and rectangular pallets, and the peripheral beam is formed on at least one of two opposing sides, with the mark portion attached to one or both sides of the fork insertion hole. A synthetic resin pallet having, on the outer circumferential surface of the pallet, an uneven portion provided inside or outside the area marked with the mark, in accordance with the mark portion, and a raised ridge portion provided linearly outside the area on the outer circumferential surface of the pallet, protruding outward from the outer circumferential surface of the pallet.

2. A beam extending downward from the mounting wall on which the load is placed, intersecting the aforementioned mounting wall, Among the girders, the peripheral girders arranged along the periphery of the aforementioned support wall are provided in pairs on the outer surface side of the pallet, spaced apart in the left-right direction, with fork insertion holes that open outwards from the pallet, Of the fork insertion holes formed on each of the four sides of the square and rectangular pallets, a mark portion representing information about the fork insertion hole is provided on the outer circumferential surface of the peripheral beam of the pallet on one or both sides of at least one pair of opposing sides of the fork insertion hole, Equipped with, The mark portion has a horizontal axis portion located on a central imaginary line passing through the center of the fork insertion hole in the vertical direction, an upper boundary portion located on an upper imaginary line connecting the upper ends of a pair of fork insertion holes, and a lower boundary portion located on a lower imaginary line connecting the lower ends of a pair of fork insertion holes, wherein the pallet is made of synthetic resin.

3. The upper boundary portion extends linearly with the upper imaginary line as the boundary line, The synthetic resin pallet according to claim 2, wherein the lower boundary portion extends linearly with the lower imaginary line as the boundary line.

4. The synthetic resin pallet according to claim 2, wherein the mark portion has a vertical axis portion that extends linearly along the vertical direction at the center in the left-right direction of the intermediate girder sandwiched between a pair of fork insertion holes among the peripheral girders.

5. The intermediate beam is provided with a rib formed at the center in the left-right direction on its back surface, extending linearly along the vertical direction, The upper boundary portion and the lower boundary portion are formed at the boundary between the colored design mark structure and the intermediate girder, The synthetic resin pallet according to claim 4, wherein the vertical axis portion is designed to be white relative to the intermediate girder.

6. The synthetic resin pallet according to claim 2, wherein the upper boundary portion and the lower boundary portion are formed at the boundary between the peripheral girder and a mark component having a lightness or hue that is visually distinguishable from the peripheral girder.

7. The aforementioned peripheral girder is molded in black using recycled material. The synthetic resin pallet according to claim 2, wherein the upper boundary portion and the lower boundary portion are formed at the boundary between the markings attached to the peripheral girder and the peripheral girder in a color with a lighter brightness than black.

8. A beam extending downward from the mounting wall on which the load is placed, intersecting the aforementioned mounting wall, Among the girders, the peripheral girders arranged along the periphery of the aforementioned support wall are provided in pairs on the outer surface side of the pallet, spaced apart in the left-right direction, with fork insertion holes that open outwards from the pallet, Of the fork insertion holes formed on each of the four sides of the square and rectangular pallets, a mark portion representing information about the fork insertion hole is provided on the outer circumferential surface of the peripheral beam of the pallet on one or both sides of at least one pair of opposing sides of the fork insertion hole, Equipped with, The aforementioned mark portion is, A horizontal axis portion located on a central virtual line passing through the center in the vertical direction of the fork insertion hole, An upper boundary portion located on an upper imaginary line connecting the upper ends of a pair of fork insertion holes, A lower boundary portion located on a lower imaginary line connecting the lower ends of a pair of fork insertion holes, A vertical axis portion extending linearly in the vertical direction at the center in the left-right direction of the intermediate girder sandwiched between the pair of fork insertion holes of the peripheral girder, It has, The aforementioned peripheral girder is molded in black using recycled material. A synthetic resin pallet in which the upper boundary portion and the lower boundary portion are formed at the boundary between the markings attached to the peripheral girder and the peripheral girder, in a color with a lighter brightness than black.

9. A fork insertion assist system for a synthetic resin pallet, comprising a pallet having a support wall on which a load is placed, a beam extending downward from the support wall and intersecting the support wall, and a pair of fork insertion holes provided on the outer pallet surface side of a peripheral beam positioned along the periphery of the support wall, spaced apart in the left-right direction, and opening outwards from the pallet, wherein the forks of a forklift are inserted into the fork insertion holes of the pallet, The pallet is a square and rectangular pallet, and among the fork insertion holes formed on each of the four sides, the fork insertion holes are formed on the outer peripheral surface of the peripheral beam of the pallet, on at least one of a pair of opposing sides, one or both sides of the fork insertion holes, and a mark portion representing information about the fork insertion holes is provided. The forklift is equipped with a laser irradiation unit that irradiates laser light in accordance with the height position of the forks, The mark portion is located on a central virtual line passing through the center of the fork insertion hole in the vertical direction, and has a horizontal axis portion capable of reflecting the laser light. A fork insertion assist system for a synthetic resin pallet, wherein the peripheral beam with the mark portion has a recessed portion provided on the outer peripheral surface of the pallet, either inside or outside the area with the mark portion in accordance with the mark portion, and a raised ridge portion provided linearly on the outer peripheral surface of the pallet, outside the area, and protruding outward from the outer peripheral surface of the pallet.

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