JP2023004221A - Pallet and packaging system - Google Patents

Abstract

To provide a pallet capable of preventing a stacking surface of a top plate from sinking, also ensuring flexural rigidity of the top plate itself, and stably loading a packaged cargo.SOLUTION: A pallet comprises: a corrugated cardboard top plate which becomes a stacking surface of a cargo; and a column member which has an opening part into which a fork member of a cargo handling device can be inserted, and supports the top plate. The top plate is a corrugated cardboard sheet piled up for two stages, and is prepared in such a manner that a middle core inserting direction of the corrugated cardboard sheet being in a stacking surface side forms an angle to an opening direction of the column member. Moreover, between the top plate and the column member, a reinforcing sheet is prepared so as to enhance the flexural rigidity of the top plate. Thus, the pallet can prevent the stacking surface of the top plate from sinking, also ensure the flexural rigidity of the top plate itself, and stably load a packaged cargo.SELECTED DRAWING: Figure 5

Description

The present invention relates to pallets and packaging systems.

A pallet used for distribution constitutes a part of a unit load form, in which an aggregate of a plurality of packaged cargoes is loaded, and the packaged cargo can be handled and distributed as an aggregate unit using transport equipment. In particular, corrugated cardboard pallets are a highly recyclable material, and have the advantage of being able to reduce the environmental load compared to other plastic, metal, and wood pallets.

As shown in FIG. 1, a conventional corrugated cardboard pallet 100 has a top plate 110 of the pallet made of a corrugated flat plate having the same size as the outer shape of the pallet. , parallel or perpendicular to the opening direction D between the support members 116 of the pallet.

However, in this case, as shown in FIG. 2, the outer box ridgeline 32 of the package cargo 30 loaded on the top plate 110 does not match the vertex through line 28 where the corrugated vertex of the core 26 is located, and the portion is not supported. occurs. As shown in FIG. 3, if the front liner 22 of the top plate 110 deforms (collapses), the packaged cargo 30 is not stably supported on the installation surface, and an unexpected load acts, resulting in a decrease in the strength of the outer box of the packaged cargo 30. There was a risk of causing a decline.

On the other hand, Patent Document 1 discloses a corrugated cardboard pallet made by folding corrugated cardboard into a rectangular shape, fixing the four corners to the back side in a triangular shape, and attaching legs to the corrugated board at appropriate intervals. there is

This corrugated cardboard pallet is arranged so that the direction in which the corrugated cardboard core, which is the top plate, is inserted is tilted with respect to the opening direction between the leg members of the pallet, so it is effective in preventing deformation (sinking) of the front liner of the top plate. It is thought that there is

However, as shown in FIG. 4, if the passing direction L of the core 26 of the corrugated cardboard flat plate that is the top plate 110 is inclined with respect to the opening direction D between the support members 116, then the top plate as a whole becomes Bending stiffness is reduced. Therefore, depending on the loading load of the packaged cargo 30, there is a possibility that the loading surface of the top plate 110 may undergo a considerable bending deformation (deflection), and the packaged cargo 30 may not be stably supported.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a pallet that prevents the loading surface of the top plate from collapsing, secures the bending rigidity of the top plate itself, and enables the stable loading of packaged cargo.

The above-mentioned problem is a pallet that includes a top plate made of cardboard that serves as a loading surface for cargo, and a strut member that has an opening into which a fork member of a cargo handling device can be inserted and supports the top plate. is a two-tiered corrugated cardboard sheet, and is provided so that the passing direction of the core of the corrugated cardboard sheet on the loading surface side forms an angle with respect to the opening direction of the support member, and the top plate and the support support The problem is solved by a pallet characterized in that a reinforcing sheet for increasing the bending rigidity of the top plate is provided between the members.

In the pallet of the present invention, the direction in which the core of the corrugated cardboard sheet on the loading surface side of the top plate is inserted forms an angle with respect to the opening direction of the strut member, so that the outer box of the cargo can be placed in the core. can be supported at multiple locations. In addition, since the reinforcing sheet is provided to increase the bending rigidity of the top plate, the bending deformation (deflection) that occurs on the loading surface of the top plate can be made relatively small. Therefore, since the packaged cargo can be stably loaded on the installation surface, it is possible to eliminate the risk of deterioration in the strength of the exterior box of the packaged cargo and improve transportation quality.

FIG. 2 is a perspective view showing a conventional corrugated board pallet; FIG. 2 is a plan view of the cardboard pallet of FIG. 1; (a) is a side view of the cardboard pallet of FIG. 1, and (b) is a partially enlarged view of the α portion. It is a perspective view (2) which shows the conventional corrugated board pallet. It is a perspective view showing a pallet concerning one embodiment of the present invention. It is a perspective view which shows the structure of a corrugated cardboard sheet. 1 is a plan view of a pallet according to one embodiment of the present invention; FIG. FIG. 4 is a schematic diagram showing an example of a vertex connecting line of the core that intersects the ridgeline of the packaging box. FIG. 3 is a schematic diagram showing the configuration of a two-tiered top plate according to one embodiment of the present invention. Both (a) and (b) are schematic diagrams showing material loss that occurs during the manufacture of the top plate. FIG. 2 is a schematic diagram (No. 2) showing the configuration of a two-tiered top plate according to one embodiment of the present invention. FIG. 4 is a schematic diagram showing bending of a top plate (corrugated cardboard sheet) according to one embodiment of the present invention. FIG. 4 is a schematic diagram showing the cargo loading surface of the top plate according to one embodiment of the present invention. FIG. 4 is a schematic diagram showing the debonding force acting when the folded portion of the corrugated cardboard sheet is on the opposite side of the cargo loading surface. FIG. 10 is a schematic diagram showing the force of peeling off the adhesive acting when the folded portion of the corrugated cardboard sheet is on the cargo loading surface side. (a) is a plan view showing a top plate using double-faced corrugated cardboard BF, and (b) is a plan view showing a top plate using double-faced corrugated cardboard AF. FIG. 2 is a perspective view showing a top plate using double-faced corrugated board; 1 is a perspective view showing a corrugated cardboard sheet folded in half into a rectangular shape; FIG. FIG. 19 is a perspective view of a pallet on which the cardboard sheets of FIG. 18 are arranged; FIG. 4 is a perspective view showing the direction in which the core is inserted and the direction in which the top plate is difficult to bend in the corrugated cardboard sheet and the reinforcing sheet. FIG. 4 is a perspective view showing the configuration of a strut member according to one embodiment of the present invention; It is a perspective view of the pallet used for the verification test 2. FIG.

(embodiment)
FIG. 5 is a perspective view showing a pallet according to one embodiment of the invention. The pallet 1 includes a corrugated cardboard top plate 10 that serves as a loading surface for packaged cargo, and a support member 16 that supports the top plate 10 . Further, the strut member 16 has an opening 16a into which a fork member of a cargo handling device such as a forklift can be inserted.

The top plate 10 of this embodiment is composed of corrugated cardboard sheets 20 that are at least two-tiered (double-layered structure). Here, the corrugated cardboard sheet 20 has a front liner 22, a back liner 24, and a corrugated core 26 sandwiched between the upper and lower liners, as shown in FIG. Further, the direction of the hollow portion of the corrugated structure in the core 26 is referred to as the hollow portion passing direction (passing direction) L. As shown in FIG.

As shown in FIG. 5, the top plate 10 of the present embodiment is such that the hollow portion passing direction L of the core 26 of the corrugated cardboard sheet 20 on the loading surface side of the packaged cargo 30 is aligned with the opening direction D of the support member 16. It is provided at an angle (inclined).

Therefore, as shown in FIG. 7, the outer box ridgeline 32 of the packaged cargo 30 to be loaded coincides (intersects) with the vertex through line 28 where the apex of the core 26 is located at a plurality of points, and the core 26 is aligned with the packaged cargo 30 can stably support a load of Therefore, deformation (sinking) of the front liner 22 of the top plate 10 can be prevented.

Furthermore, the pallet 1 of the present embodiment is provided with a reinforcing sheet 14 between the top plate 10 and the support member 16 for increasing the bending rigidity of the top plate 10 (that is, the two-tiered corrugated cardboard sheets 20). (See Figure 5). Therefore, the bending deformation (deflection) that occurs on the loading surface of the top plate 10 can be made relatively small.

In this way, the pallet 1 of the present embodiment prevents the loading surface of the top plate 10 from sinking and also ensures the bending rigidity of the top plate 10 itself, so that the packaged cargo 30 can be stably loaded and transportation quality is improved. can.

Next, an advantageous configuration of the top plate 10 of this embodiment will be described.

(Inserting direction of core)
The corrugated cardboard sheet 20 on the loading surface side of the packaged cargo 30 is arranged so that the direction L of passing the hollow portion of the core 26 forms an angle clockwise or counterclockwise with respect to the opening direction D of the support member 16. is provided.

The angle is such that, as shown in FIG. 8 as an example, the vertex through line 28 where the corrugated vertex of the core 26 is positioned is at least about 4 degrees from the outer box ridge line 32 of the packaged cargo 30 loaded on the top plate 10 . By forming an angle of degree, one intersection point (fulcrum) can be provided. Therefore, in the top plate 10, the passing direction L of the core 26 of the cardboard sheet 20 on the loading surface side is 5 degrees or more and 85 degrees or less clockwise or counterclockwise with respect to the opening direction D of the support member 16. It is desirable to provide it so as to form an angle of

In FIG. 8, one side of the general-purpose outer box is about 150 mm, and the distance between the cores 26 of the corrugated cardboard sheet 20 (the distance between the corrugated vertices) is 10 mm. It was calculated that an angle of about 4° is formed as a condition for intersection with the vertex connecting line 28 on which the apex of the wave shape is located.

(Two layers/Double structure)
FIG. 9 is a schematic diagram showing the configuration of a two-tiered top plate according to one embodiment of the present invention. As the two-tiered top plate 10, a configuration in which one corrugated cardboard sheet 20 is folded and overlapped can be used.

When manufacturing the two-tiered top plate 10, if the core 26 is cut so that the passing direction L is 5 to 85 degrees, for example, as shown in FIG. , yield loss). Therefore, as shown in FIG. 11, a single corrugated cardboard sheet is folded, and the folded portion 20a is superimposed on the original corrugated cardboard sheet 20 to manufacture the two-tiered top plate 10. As shown in FIG. This can eliminate material loss.

(bending)
FIG. 12 is a schematic diagram showing the bending process of the top plate (cardboard sheet). The bent portion 20a (see FIG. 11) of the corrugated cardboard sheet 20 can be bent by (a) creasing or (b) cutting in half.

When the cardboard sheet 20 is folded in the creasing process, the cross section of the corrugated cardboard sheet 20 is not exposed at the folded portion, so that moisture can be prevented from entering. On the other hand, in the case of folding by half-slicing, the folding work becomes easier and the manufacturing efficiency of the pallet can be improved.

(Cargo loading surface)
FIG. 13 is a schematic diagram showing the cargo loading surface of the top plate according to one embodiment of the present invention. In the top plate 10 constructed by folding and stacking one corrugated cardboard sheet 20, it is desirable that the surface formed by the folded portion 20a (see FIG. 11) be used as the loading surface of the packaged cargo 30. FIG.

The folded portion 20a of the cardboard sheet 20 is usually adhered to the original cardboard sheet 20 with an adhesive or the like. When this bent portion 20a is located on the opposite side of the loading surface of the packaged goods 30, as shown in FIG. 14, when the top plate 10 is bent by the load, a force _Ft is applied to peel off the adhesive portion of the bent portion 20a. , the adhesive portion may come off.

On the other hand, if there is a bent portion 20a on the stacking surface side, as _shown in FIG. By abutting each other, peeling of the bonded portion is less likely to occur. Therefore, it is advantageous to use the surface formed by the folded portion 20a of the corrugated cardboard sheet 20 on the top plate 10 as the surface on which the packaged cargo 30 is to be loaded.

(Corrugated cardboard sheet that makes up the top plate)
Next, the corrugated cardboard sheet 20 used for the top plate 10 will be described. It is desirable to use a double-faced corrugated board sheet or a double-faced corrugated board sheet for the top plate 10 having a two-tier structure.

In the case of a double-faced corrugated cardboard sheet, by adopting a corrugated cardboard sheet with a high core density (a short distance between core vertexes) such as the B-flute standard, as shown in FIG. A large number of intersections (fulcrums) with the ridgeline 32 can be provided. Therefore, the collapse of the loading surface of the top plate 10 can be prevented more effectively.

On the other hand, in the case of a double-faced corrugated cardboard sheet, as shown in FIG. 17, the bending rigidity of the top plate itself can be effectively ensured by increasing the thickness and thereby increasing the bending rigidity. In addition, by placing the low layer 34 of the two-layer structure on the loading surface side of the packaged cargo 30, the density of the core is increased (the distance between the vertices of the core is shortened). It can also effectively prevent the surface from sinking.

Further, the corrugated cardboard sheet 20 used for the top plate 10 preferably uses a reinforcing core material for the core, so that the load-bearing strength of the wavy core structure can be further increased.

(Other configurations of top plate)
The top plate 10 may be formed by folding the corrugated cardboard sheet 20 in half into a rectangular shape (see FIG. 18) and arranging at least two of them side by side on the same plane (see FIG. 19). In this configuration, since one side of each corrugated cardboard sheet 20 constituting the top plate 10 is shortened, the bending rigidity can be further increased.

Next, an advantageous configuration of the reinforcing sheet 14 of this embodiment will be described.

A corrugated cardboard sheet can be used for the reinforcing sheet 14 (see FIG. 5) provided between the top plate 10 and the support member 16 . For example, as shown in FIG. 20, it is desirable that the direction L in which the core 26 of the reinforcing sheet 14 is passed intersects with the direction L in which the core 26 of the cardboard sheet 20 (two-tiered top plate 10) is passed. .

As a result, the composite of the top plate 10 and the reinforcing sheet 14 has high rigidity against bending in the different directions M1, M2, and M3, making it difficult to bend in those directions. In particular, by setting the passing direction L of the core 26 of the reinforcing sheet 14 in a direction perpendicular to the opening direction D of the support member 16, the bending rigidity of the top plate 10 itself can be reliably secured.

Further, by providing a plurality of reinforcing sheets 14, higher bending rigidity of the top plate 10 itself can be ensured.

Subsequently, other advantageous configurations will be described.

The strut member 16 can be constructed of a laminated member made of corrugated cardboard. Alternatively, as shown in FIG. 21, a cylindrical member 36 made of paper tube base paper may be used. Both are lightweight and highly rigid, so the pallet can be stably placed on the ground.

Also, a bottom plate 40 may be provided on the bottom surface of the support member 16 (see FIG. 13) to increase the rigidity of the entire pallet. Furthermore, the pallet 1 (in particular, the top plate 10 and the reinforcing sheet 14) of the present embodiment may be provided on a separate wooden pallet or a plastic pallet, and configured as a composite material pallet having a highly rigid top plate. good.

(Verification test 1)
Due to the difference in the passing direction of the core of the top plate (cavity of the corrugated structure), the loading surface of the top plate collapses due to the outer box loaded on the top plate, and the support of the outer box becomes unstable. Comparative verification was carried out to see how much the problem of reduced buckling strength could be improved. Specifically, using a predetermined pallet configuration, the compression test was performed by changing the direction of the core of the top plate of the pallet and the angle formed by the ridge line of the outer box, and the buckling strength of the outer box was measured. bottom.
Materials used:
Outer box (JIS Z0201A format), material (K liner, A flute)
Pallet top plate (AB flute top plate member), material (K liner, straight configuration of reinforced core material)
conditions:
1. "0° specification" The angle between the direction of core insertion and the ridgeline of the outer box is 0° (see Fig. 2).
2. "45° specification" The angle formed by the direction of core insertion and the ridgeline of the exterior box is 45° (see Fig. 7).
Results As shown in Table 1, the strength of the "45° specification" was increased by about 12% compared to the "0° specification".

(Verification test 2)
When the direction L through which the center core is passed is provided in a direction perpendicular to the opening direction D of the support member 16 (condition 1), and when it is provided inclined with respect to the opening direction D of the support member 16 (condition 2; FIG. 22), a comparative verification test was conducted to see how much difference in rigidity would occur. The materials used are the same as in (verification test 1).

As a result, the bending strength of (Condition 2) was found to be about 10% lower than the bending strength of (Condition 1).

From verification tests 1 and 2, it can be seen that inclining the direction of insertion L of the core of the top plate has the effect of preventing the loading surface of the top plate from collapsing, but the bending rigidity of the top plate itself decreases.

The invention has been described in detail above with the aid of embodiments and advantageous configurations. The pallet of this embodiment is particularly intended to be used for loading the image forming apparatus and/or its peripheral devices in a packaging system that allows the image forming apparatus and/or its peripheral devices to be handled and distributed. However, it is not limited to them, and can be widely used for general purposes. Also, the above-described embodiment is only an example, and can be used with various modifications within the scope of the invention.

Reference Signs List 1 pallet 10, 110 top plate 14 reinforcing sheet 16, 116 strut member 16a opening 20 corrugated cardboard sheet 20a bent portion 22 front liner 24 back liner 26 center core 28 vertex through line 30 package cargo 36 cylindrical member 32 outer box ridge line 40 bottom plate 100 Cardboard pallet D Opening direction L (hollow part) passing direction

Japanese Utility Model Laid-Open No. 52-156055

Claims (17)

A top plate made of corrugated board that serves as a loading surface for cargo,
a strut member having an opening into which a fork member of a cargo handling device can be inserted and supporting the top plate;
In a pallet comprising
The top plate is a two-tiered cardboard sheet, and is provided so that the direction in which the core of the cardboard sheet on the loading surface side is inserted forms an angle with respect to the opening direction of the support member,
A pallet, wherein a reinforcing sheet is provided between the top plate and the support member to increase bending rigidity of the top plate. In the top plate, the direction in which the core of the corrugated cardboard sheet on the loading surface side forms an angle of 5 degrees or more and 85 degrees or less clockwise or counterclockwise with respect to the opening direction of the support member. 2. A pallet according to claim 1, wherein the pallet is provided in a . 3. The pallet according to claim 1, wherein the top plate is formed by folding and stacking one corrugated cardboard sheet. 4. The pallet according to claim 3, wherein the corrugated cardboard sheet is folded by creasing or cutting in half. 5. The pallet according to claim 3, wherein the bent portion of the cardboard sheet of the top plate serves as a loading surface for the cargo. 6. The pallet according to any one of claims 1 to 5, wherein the corrugated cardboard sheet forming the top plate is a double-faced corrugated cardboard sheet or a double-faced corrugated cardboard sheet. 6. The corrugated cardboard sheet forming the top plate is a double-faced corrugated cardboard, and a layer having a low core height serves as a loading surface side of the cargo. Palettes as described in paragraph. 6. The pallet according to any one of claims 1 to 5, wherein the top plate is formed by folding a corrugated cardboard sheet into a rectangular shape and arranging at least two of them side by side on the same plane. 9. The pallet according to any one of claims 1 to 8, wherein the corrugated cardboard sheet forming the top plate has a reinforcing core material. 10. The pallet according to any one of claims 1 to 9, wherein a direction in which the core of the reinforcing sheet is passed intersects a direction in which the core of the top plate is passed. 11. The pallet according to any one of claims 1 to 10, wherein a direction in which the core of the reinforcing sheet is passed is perpendicular to an opening direction of the support member. 12. The pallet according to any one of claims 1 to 11, comprising a plurality of said reinforcing sheets. 13. The pallet according to any one of claims 1 to 12, wherein the support members are composed of laminated members made of corrugated cardboard or cylindrical members made of cardboard base paper. 14. The pallet according to claim 13, wherein a bottom plate is provided on the bottom surface of said support member. A pallet comprising the top plate and the reinforcing sheet according to any one of claims 1 to 12 provided on a separate pallet. 16. A pallet according to claim 15, wherein said separate pallet is made of wood or plastic. A packaging system using the pallet according to any one of claims 1 to 16 for loading an image forming apparatus.

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