Pallet

Abstract

To provide a corrugated cardboard pallet that increases durability / strength without changing the paper material or thickness.SOLUTION: A cardboard pallet 1 transported with lifter claws T while inserted through insertion ports, including a honeycomb-structured top panel 10, in which the paper grain of the honeycomb structure of the top panel extends such that it intersects with the insertion direction of the lifter claws.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a cardboard pallet. [Background technology]

[0002] In recent years, cardboard pallets have been attracting attention in the logistics industry as an alternative to plastic and wooden pallets (for example, see Patent Document 1 below). Cardboard pallets are lightweight and easy to handle, making them highly safe. Furthermore, because cardboard pallets are made from paper, it is easy to change the material, shape, and adjust the strength. Furthermore, cardboard pallets use recycled materials, which offers many environmental benefits. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-062837 Summary of the Invention [Problem to be solved by the invention]

[0004] When using a lifter to move or transport a loaded pallet, various operations are required, such as inserting the lifter's claws into the pallet and lifting it, which can lead to deformation of the top plate, resulting in the load being crushed or collapsed.In response to this, it is possible to increase the durability and strength of a cardboard pallet by selecting the right surface coating, material, and thickness of the paper, for example, but this leads to an increase in the pallet size and cost, which makes selecting the cardboard material less meaningful.

[0005] The present invention has been made to solve the above problems, and aims to provide a cardboard pallet that has increased durability / strength without changing the paper material or thickness. [Means for solving the problem]

[0006] The above object of the present invention can be achieved by the following means.

[0007] (1) A cardboard pallet that is transported with the lifter claws inserted through the insertion port, Equipped with a honeycomb structure top plate, A pallet in which the grain of the honeycomb structure of the top plate extends so as to intersect with the insertion direction of the lifter claws.

[0008] (2) A pallet as described in (1), further comprising a blocking member that prevents the lifter claws from inserting along the direction in which the grain extends.

[0009] (3) A pallet according to (1) or (2), wherein a mark indicating the insertion direction of the lifter claw is displayed on the surface of the top plate.

[0010] (4) The top plate is configured by stacking a plurality of sheets, A pallet described in any one of (1) to (3), wherein the extension direction of the grain of one of the top plates and the extension direction of the grain of another of the top plates adjacent to it in the stacking direction are configured to intersect with each other.

[0011] (5) The pallet according to any one of (1) to (4), wherein the grain of the top plate extends so as to be inclined with respect to the insertion direction of the lifter claws. [Effects of the Invention]

[0012] With the pallet configured as described above, the grain of the honeycomb structure of the top plate is configured to cross the insertion direction of the lifter claws, increasing the durability and strength of the pallet. This reduces the frequency of problems associated with deformation of the top plate of cardboard pallets during loading and unloading operations. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a perspective view showing a pallet according to a first embodiment of the present invention. [Figure 2] 1 is a perspective view showing an example of a state in which cargo is placed on a pallet according to a first embodiment. FIG. [Figure 3] FIG. 10 is a perspective view showing another example of a state in which cargo is placed on the pallet according to the first embodiment. [Figure 4] 5A to 5C are diagrams for explaining a method for manufacturing a top plate of a pallet according to the first embodiment. [Figure 5] FIG. 5 is a view for explaining the method for manufacturing the top plate of the pallet according to the first embodiment, and is a view following FIG. 4. [Figure 6] FIG. 6 is a view for explaining the method for manufacturing the top plate of the pallet according to the first embodiment, and is a view following FIG. 5. [Figure 7] 3 is a diagram for explaining the direction in which the grain of paper extends and the insertion direction of the lifter claws on the top plate of the pallet according to the first embodiment. FIG. [Figure 8] FIG. 1 is a front view showing a pallet according to a first embodiment. [Figure 9] 10 is a diagram illustrating the extending direction of the grain and the insertion direction of the lifter claws on the top plate of the pallet according to the comparative example. FIG. [Figure 10] FIG. 10 is a front view showing a pallet according to a comparative example. [Figure 11] FIG. 10 is a front view showing a state in which a load collapse has occurred in a pallet according to a comparative example. [Figure 12] 4 is a graph showing the relationship between load and displacement amount in the pallet according to the first embodiment and a pallet according to a comparative example. [Figure 13] FIG. 10 is a perspective view showing a pallet according to a first modified example of the first embodiment. [Figure 14] FIG. 10 is a perspective view showing a pallet according to a second modified example of the first embodiment. [Figure 15] FIG. 10 is a perspective view showing a pallet according to a third modified example of the first embodiment. [Figure 16] FIG. 10 is a perspective view showing a pallet according to a fourth modified example of the first embodiment. [Figure 17]FIG. 11 is a perspective view showing a pallet according to a fifth modified example of the first embodiment. [Figure 18] FIG. 10 is a front view showing a pallet according to a second embodiment. [Figure 19] FIG. 10 is a front view showing a pallet according to a first modified example of the second embodiment. [Figure 20] FIG. 10 is a schematic diagram for explaining the configuration of a pallet according to a second embodiment. [Figure 21] FIG. 10 is a schematic diagram for explaining the configuration of a pallet according to a third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0014] First Embodiment A first embodiment of the present invention will be described with reference to Figures 1 to 8. In the description of the drawings, the same elements are given the same reference numerals, and duplicate explanations will be omitted. The dimensional proportions in the drawings are exaggerated for the convenience of explanation and may differ from the actual proportions.

[0015] FIG. 1 is a perspective view showing a pallet 1 according to a first embodiment of the present invention. FIG. 2 is a perspective view showing an example in which cargo 90 is placed on the pallet 1 according to the first embodiment. FIG. 3 is a perspective view showing another example in which cargo 90 is placed on the pallet 1 according to the first embodiment. FIG. 4 is a diagram illustrating a manufacturing method for the top plate 10 of the pallet 1 according to the first embodiment. FIG. 5 is a diagram illustrating a manufacturing method for the top plate 10 of the pallet 1 according to the first embodiment, and is a diagram following FIG. 4. FIG. 6 is a diagram illustrating a manufacturing method for the top plate 10 of the pallet 1 according to the first embodiment, and is a diagram following FIG. 5. FIG. 7 is a diagram illustrating the extending direction of the grain of the top plate 10 of the pallet 1 according to the first embodiment and the insertion direction of the lifter claws T. FIG. 8 is a front view showing the pallet 1 according to the first embodiment.

[0016] As shown in Fig. 1, the pallet 1 according to the first embodiment has a top plate 10 and girders 20. As shown in Figs. 2 and 3, the pallet 1 is transported to a predetermined location by a lifter with cargo 90 placed on it. The cargo 90 is placed in an aligned state as shown in Fig. 2, or in a spiral arrangement as shown in Fig. 3.

[0017] The top plate 10 has a so-called honeycomb structure. A method for manufacturing the top plate 10 will be described below with reference to Figures 4 to 6. The method for manufacturing the top plate 10 is a known method.

[0018] First, as shown in Fig. 4, glue is applied to the base paper P (white areas in Fig. 4) and cut into strips (see arrows in Fig. 4). Next, as shown in Fig. 5, the cut strips of base paper P are stood up and adjacent base papers are bonded together. Next, as shown in Fig. 6, the bonded base papers are stretched in the direction of the arrow in Fig. 6 to form a honeycomb structure.

[0019] At this time, the grain of the honeycomb structure is formed so as to extend in the left-right direction in the enlarged view of FIG.

[0020] In this embodiment, as shown in FIGS. 7 and 8, the grain of the honeycomb structure of the top plate 10 extends perpendicular to the insertion direction of the lifter claws T (the vertical direction in FIG. 7).

[0021] As shown in FIG. 1, the girders 20 are positioned below the top plate 10 and support the top plate 10. In this embodiment, nine girders 20 are arranged when viewed from above in the vertical direction. The nine girders 20 are arranged so as to be spaced apart from each other by a predetermined distance in the horizontal plane. Insertion holes for the lifter claws T are formed between the girders 20 spaced apart from each other by the predetermined distance.

[0022] Next, the configuration of a pallet 900 according to a comparative example and the state of cargo collapse will be described with reference to Figures 9 to 11. Figure 9 is a diagram for explaining the extending direction of the grain of the top plate 910 of the pallet 900 according to the comparative example and the insertion direction of the lifter claws T. Figure 10 is a front view showing the pallet 900 according to the comparative example. Figure 11 is a front view showing the state of cargo collapse occurring in the pallet 900 according to the comparative example.

[0023] In the comparative example, as shown in FIGS. 9 and 10, the grain of the honeycomb structure of the top plate 910 of the pallet 900 is formed so as to be parallel to the lifter claws T.

[0024] In the configuration of the pallet 900 according to the comparative example, when the pallet 900 carrying cargo is lifted by the lifter claws T, the grain of the honeycomb structure of the top plate 910 of the pallet 900 is parallel to the lifter claws T, so a force acts in a direction that separates the bonded portions. Therefore, there is a risk of the bonded portions peeling off, which could cause the cargo to collapse, as shown in FIG. 11.

[0025] In contrast, in the case of the pallet 1 of this embodiment, when the pallet 1 on which cargo is placed is lifted by the lifter claw T, the grain of the honeycomb structure of the top plate 10 is formed perpendicular to the lifter claw T, making it resistant to shear and effectively preventing the bonded parts from separating.

[0026] Referring now to FIG. 12, the results of a strength test on the top plates of the pallet 1 according to the first embodiment and the pallet 900 according to the comparative example are shown. In FIG. 12, the horizontal axis represents the load applied to the top plate, and the vertical axis represents the amount of displacement of the top plate. As can be seen from FIG. 12, in the case of the pallet 900 according to the comparative example (see the circle in FIG. 12), the bonded portion separated when the load was 300 kgf. In contrast, in the case of the pallet 1 according to the first embodiment (see the square in FIG. 12), the bonded portion did not separate up to a load of 500 kgf. These results demonstrate that the top plate 10 according to the first embodiment increases the durability / strength of the pallet.

[0027] Next, with reference to Figures 13 to 17, modifications 1 to 5 of the pallet 1 according to the first embodiment will be described. Figure 13 is a perspective view showing a pallet 2 according to modification 1 of the first embodiment. Figure 14 is a perspective view showing a pallet 3 according to modification 2 of the first embodiment. Figure 15 is a perspective view showing a pallet 4 according to modification 3 of the first embodiment. Figure 16 is a perspective view showing a pallet 5 according to modification 4 of the first embodiment. Figure 17 is a perspective view showing a pallet 6 according to modification 5 of the first embodiment.

[0028] As shown in Fig. 13, the pallet 2 according to the first modification of the first embodiment has a blocking member 30 that blocks the insertion of the lifter claws T along the direction in which the grain of the paper extends. The blocking member 30 may be configured integrally with the beam 20, or may be configured separately from the beam 20. This configuration makes it possible to prevent the lifter claws T from being inserted erroneously along the direction in which the grain of the paper extends.

[0029] As shown in Fig. 14, the pallet 3 according to the second modification of the first embodiment has an arrow formed on the top surface of the top plate 10 so that it is possible to visually confirm that the lifter claws T are inserted from a direction perpendicular to the direction in which the grain of the paper extends. This configuration makes it possible to prevent the lifter claws from being inserted in the wrong direction.

[0030] As shown in Fig. 15, the pallet 4 according to the third modification of the first embodiment has the character "claw" formed on the top surface of the top plate 10 so that the lifter claws can be visually inserted from a direction perpendicular to the direction in which the grain extends. This configuration prevents the lifter claws from being inserted in the wrong direction.

[0031] As shown in Fig. 16, the pallet 5 according to the fourth modification of the first embodiment has an arrow with a cross on it in the direction along the grain of the paper so that the lifter claws can be visually inserted from a direction perpendicular to the direction of the grain. This configuration prevents the lifter claws from being inserted in the wrong direction.

[0032] As shown in Fig. 17, the pallet 6 according to the fifth modification of the first embodiment has a cross mark formed on the character for "claw" in the direction along the grain so that it is possible to visually confirm that the lifter claw is being inserted from a direction perpendicular to the direction of the grain. This configuration makes it possible to prevent the lifter claw from being inserted in the wrong direction.

[0033] <Pallet 7 according to the second embodiment> Next, the configuration of a pallet 7 according to a second embodiment will be described with reference to Figures 18 to 20. Figure 18 is a front view showing a pallet 7 according to the second embodiment. Figure 19 is a front view showing a pallet 7 according to Modification 1 of the second embodiment. Figure 20 is a schematic view for explaining the configuration of a pallet 7 according to the second embodiment.

[0034] As shown in FIGS. 18 to 20, the top plate 110 of the pallet 7 according to the second embodiment is configured so that the top plate 10 according to the first embodiment and a top plate 910 according to the comparative example are stacked one on top of the other.

[0035] The thickness of the top plate 10 and the top plate 910 in the stacking direction may be the same as that of the top plate 10 according to the first embodiment, as shown in FIG. 18, or may be half the thickness of the top plate 10 according to the first embodiment, as shown in FIG. 19.

[0036] By configuring the top plate 110 of the pallet 7 according to the second embodiment in this way, the strength of the top plate 110 can be increased, and it has a configuration that is resistant to shear. In addition, since the lifter claws T can be inserted from any direction, the versatility of work is improved.

[0037] <Pallet 8 according to the third embodiment> Next, the configuration of the pallet 8 according to the third embodiment will be described with reference to Fig. 21. Fig. 21 is a schematic diagram for explaining the configuration of the pallet 8 according to the third embodiment.

[0038] As shown in Fig. 21, the top plate 210 of the pallet 8 according to the third embodiment is configured so that the direction in which the grain extends is inclined (for example, 45 degrees) relative to the lifter claws T. With this configuration, the lifter claws T can be inserted from any direction, improving the versatility of the work.

[0039] The present invention is not limited to the above-described embodiments, but can be modified in various ways within the scope of the claims. [Explanation of symbols]

[0040] 1, 2, 3, 4, 5, 6, 7, 8 pallets, 10, 110, 210 top plate, 30 blocking member; 90 luggage, T-lifter claws.

Claims

1. A cardboard pallet that is transported with the lifter claws inserted through the insertion port, Equipped with a honeycomb structure top plate, A pallet in which the grain of the honeycomb structure of the top plate extends so as to intersect with the insertion direction of the lifter claws.

2. The pallet according to claim 1, further comprising a blocking member that blocks the lifter claws from inserting in the direction in which the grain of the paper extends.

3. The pallet according to claim 1 or 2, wherein a mark indicating the insertion direction of the lifter claws is displayed on the surface of the top plate.

4. The top plate is configured by stacking a plurality of sheets, The pallet according to claim 1 or 2, wherein the extending direction of the grain of one of the top plates and the extending direction of the grain of another of the top plates adjacent to the top plate in the stacking direction are configured to intersect with each other.

5. The pallet according to claim 1 or 2, wherein the grain of the top plate extends at an angle with respect to the insertion direction of the lifter claws.

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