JPH11301672A - Paper pallet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper pallet having a high strength and a high rigidity without reinforcing it with metallic material. SOLUTION: Three vertical beams 15 of belt-like plate and four lateral beams 16 are combined like a grid-like shape with their plate thicknesses being directed horizontal so as to constitute a grid member 14. The upper plate member is fixed to the upper surface of the grid member 14 and at the same time a lower plate member 13 is fixed to the lower surface of the grid member 14. Since a load can be supported by the grid-like combined grid member 14, it is possible to attain a pallet having a high strength and a high ragidity only with paper material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper pallet made of paper, such as corrugated cardboard, and more particularly to paper which can obtain sufficient strength and shape stability without being reinforced by a metal material. Pallets

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 7 and 8, for example, an arbitrary number of round paper tubes 4 are interposed between an upper plate member 2 and a lower plate member 3 made of corrugated cardboard. A paper pallet 1 in which a member 2 and a lower plate member 3 are connected to each other and a space formed by a round paper tube 4 is used as a fork pocket 5 for inserting a fork of a forklift is generally known.

[0003]

In the conventional paper pallet 1, the strength and shape stability of the pallet can be obtained by improving the strength and rigidity of the upper plate member 2 and the lower plate member 3 exclusively. However, there is a certain limit to obtaining strength and shape stability with only the two members 2 and 3 made of corrugated cardboard. For this reason, in the conventional paper pallet 1, when an unbalanced load is applied, there is a problem that the paper pallet 1 bends or breaks.

For this reason, for example, a method has been adopted in which a metal plate is adhered and fixed to the lower surface of the lower plate member 3 to prevent the bending of the paper pallet 1, but the weight of the paper pallet 1 increases. At the same time, when disposing the paper pallet 1, there is a problem that the paper material and the metal material must be separated, and the work is not easy.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and it is possible to obtain paper having sufficient strength and shape stability without reinforcing with a metal material, and furthermore, a paper which can be made lightweight with a small number of materials. The purpose is to provide a pallet made of.

Another object of the present invention is to provide a paper pallet in which an upper plate member can have sufficient strength and shape stability.

Another object of the present invention is to stabilize the shape of the rectangular wave-shaped lower surface member even when a load is applied to the upper plate member from an oblique direction, and to prevent a reduction in strength as a pallet. To provide a paper pallet that can be used.

Another object of the present invention is to provide a paper pallet in which a load applied to an upper plate member is supported by a cross beam member, so that bending of the upper plate member can be more effectively prevented. .

Another object of the present invention is to provide a paper pallet capable of further improving the strength and shape stability of the pallet and stabilizing the frame state between the vertical beam member and the horizontal beam member. To be.

Another object of the present invention is to provide a paper pallet in which a lower plate member can have sufficient strength and shape stability.

Another object of the present invention is to stabilize the shape of the rectangular wave-shaped upper surface member even when a load is applied to the lower plate member from an oblique direction, and to prevent a reduction in strength as a pallet. To provide a paper pallet that can be used.

Another object of the present invention is to provide a paper pallet capable of improving the integral strength of the lower plate member and the spar member and more completely preventing the pallet from bending.

Still another object of the present invention is to provide a paper pallet which ensures sufficient strength and shape stability even when used outdoors in rainy weather.

[0014]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a girder member comprising an arbitrary number of vertical girder members and horizontal girder members orthogonally arranged in the thickness direction, and a girder member comprising the girder member. An upper plate member arranged and fixed on the upper surface side of the member, and a fork pocket for inserting a fork of a forklift is provided on at least one of the two girder members. It is characterized by being substantially flush with the lower surface of the plate member. And since it is made to support the upper plate member from the lower surface side with the girder member which is constructed by framing the vertical girder material and the horizontal girder material in a lattice shape, only the paper material is not reinforced with a metal material. Thus, it is possible to obtain sufficient strength and shape stability, and since the upper plate member is reinforced by the girder member, it is possible to reduce the weight with a small amount of material.

The present invention is also characterized in that the upper plate member is constituted by a lower surface member obtained by bending a flat plate material into a rectangular wave shape, and a flat upper surface member fixed to the upper surface of the lower surface member. I do. Thus, the upper plate member can have sufficient strength and shape stability.

The present invention is also characterized in that an arbitrary number of engaging projections conforming to the shape of the lower surface of the lower surface material are provided on the upper edge of the longitudinal beam. Thus, even when a load is applied to the upper plate member from an oblique direction, it is possible to stabilize the shape of the rectangular wave-shaped lower surface member, and to prevent a reduction in strength as a pallet. .

The present invention is also characterized in that a lower plate member is arranged and fixed on the lower surface side of the girder member. As a result, the girder member is sandwiched from above and below by the two plate members, making it possible to further improve the strength and shape stability of the pallet, and to stabilize the frame condition between the vertical girder and the horizontal girder. It is possible to do.

The present invention is further characterized in that the lower plate member is constituted by an upper surface member obtained by bending a flat plate member into a rectangular wave shape, and a flat lower surface member fixed to the lower surface of the upper surface member. I do. Thus, the lower plate member can have sufficient strength and shape stability.

The present invention is also characterized in that an arbitrary number of engagement projections corresponding to the concave and convex shape of the upper surface of the upper surface member are provided on the lower edge of the vertical beam member. Thus, even when a load is applied to the lower plate member from an oblique direction, it is possible to stabilize the shape of the rectangular wave-shaped upper surface member and prevent a reduction in strength as a pallet.

The present invention is also characterized in that the cross beam is disposed at a concave position below the upper surface of the upper surface material, and the lower edge thereof is brought into contact with the upper surface material. Thus, it is possible to improve the integral strength of the lower plate member and the spar member, and to more completely prevent the pallet from bending.

The present invention is further characterized in that each component of the pallet is made water-resistant. Thus, sufficient strength and shape stability can be ensured even when used outdoors in rainy weather.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 1 to 4 show a paper pallet according to a first embodiment of the present invention.
1 is an upper plate member 12, as shown in FIGS.
A lower plate member 13 and a girder member 14 interposed between the two plate members 12, 13 are provided so that the strength and shape stability of the paper pallet 11 are ensured by the girder member 14. It has become.

That is, as shown in FIGS. 1 to 5, the beam member 14 has, for example, three vertical beam members 15 in the form of a strip with the plate thickness direction oriented horizontally, and the strip thickness direction oriented horizontally. For example, four horizontal beam members 16 in the shape of a strip are formed so as to be orthogonal to each other, and are framed in a lattice shape.
2, and a lower plate member 13 is fixedly arranged on the lower surface side.

As shown in FIGS. 1 to 4, the upper plate member 12 has a lower surface member 17 obtained by bending a flat plate made of paper such as cardboard into a rectangular wave shape, and is adhered and fixed to the upper surface of the lower surface member 17. And an upper surface member 18 made of a flat paper material such as corrugated cardboard. The lower surface member 17 having a rectangular wave shape has sufficient strength and rigidity in the extending direction of the horizontal beam member 16 described in detail later. Can be secured.

As shown in FIGS. 1 to 4, the lower plate member 13 is formed by bending a flat plate made of paper, such as corrugated cardboard, into a rectangular wave having the same shape and dimensions as the lower surface member 17.
And a lower surface member 20 made of a paper-made flat plate material such as a corrugated cardboard, which is adhered and fixed to the lower surface of the upper surface member 19. , Sufficient strength and rigidity can be secured. That is, the lower plate member 13 has a shape in which the upper plate member 12 is turned upside down.

The vertical girder member 1 constituting the girder member 14
As shown in FIG. 1 to FIG. 5, a strip 5 is formed by cutting a paper board material such as corrugated cardboard having a sufficient thickness into a strip shape, and has a lateral edge which will be described in detail later. Four notches 21 are provided at the intersections with the beam members 16, and at positions corresponding to the recesses 17 a above the lower surface member 17 other than the cuts 21, squares having the same shape and dimensions as the recesses 17 a are provided. For example, six engagement projections 22 are provided. When the upper plate member 12 is arranged on the upper surface side of the spar member 14, each of the engagement protrusions 22 is provided in the recess 1 of the lower surface member 17.
The lower surface member 17 can be prevented from being deformed by being fitted into and locked to 7a.

The lower end edge of the vertical girder member 15 has a shape shown in FIG.
As shown in FIG. 4, for example, six angular engaging projections 23 are provided at positions corresponding to the engagement projections 22 in the vertical direction.
Are respectively provided, and each of these engagement protrusions 23
When the lower plate member 13 is arranged on the lower surface side of the spar member 14, the lower plate member 13 is fitted and locked in the concave portion 19a below the upper surface member 19, so that the deformation of the upper surface member 19 can be prevented.

On the other hand, as shown in FIGS. 1 to 5, each of the horizontal beam members 16 constituting the beam member 14 is formed by cutting a paper board material such as a corrugated cardboard having a sufficient strength into a strip shape. At its lower end edge, three cuts 24 are provided at intersections with the longitudinal beam members 15, and two plate surfaces are provided with fork pockets for inserting forks of a forklift (not shown). 25 are provided.

As shown in FIGS. 3 and 4, each of the cross beams 16 is provided with a corresponding one of the concave portions 17 of the lower surface member 17 and the upper surface member 19.
The upper edge of the lower surface member 17 is in contact with the bottom of the recess 17a, and the lower edge thereof is in contact with the bottom of the recess 19a of the upper surface member 19. Thus, the load applied to the upper plate member 12 is supported by the horizontal beam members 16, and the bending of the upper plate member 12 can be effectively prevented.

Next, the operation of the present embodiment will be described. In use, first, a predetermined luggage is mounted on the upper plate member 12, and the luggage is secured to the paper pallet 11 as necessary. Then, the fork of the forklift is inserted into each fork pocket 25, and the load is lifted via the paper pallet 11.

At this time, each fork pocket 25
Of the upper plate member 12 is substantially flush with the lower surface of the lower surface member 17 of the upper plate member 12, so that the fork of the forklift inserted into the fork pocket 25 can lift the pallet 11 made of paper. Of the lower surface member 17 as well as the upper edge of the lower surface member 17. Therefore, the paper pallet 11 can be brought into contact with the fork of the forklift in a wide area.

When a fork of a forklift is inserted into each fork pocket 25, the load of the paper pallet 11 in the direction in which the fork extends, that is, in the direction in which the longitudinal beam 15 extends, is supported by the fork of the forklift. So there is little problem.

On the other hand, with respect to the bending of the paper pallet 11 in the direction perpendicular to the extending direction of the fork, that is, in the extending direction of the cross beam 16, the load is supported by the paper pallet 11 itself. This is a big problem.

However, in the present embodiment, the lower surface member 17 of the upper plate member 12 and the upper surface member 19 of the lower plate member 13 are provided.
Since each of the concave and convex shapes extends in the same direction as the horizontal beam members 16, it is possible to effectively prevent the paper pallet 11 from bending in this direction.

FIG. 6 shows a second embodiment of the present invention, in which a lower surface member 17 of an upper plate member 12 and a lower plate member 13 are provided.
In each of the concave and convex portions of the upper surface member 19, a deformation preventing member 30 made of a corrugated cardboard having a V shape or a mountain shape is inserted and arranged. In other respects, the configuration is the same as that of the first embodiment, and the operation is the same.

Since the deformation preventing member 30 is inserted and arranged in each of the convex portions of the lower surface member 17 and the upper surface member 19, each of the convex portions is prevented from being crushed by a load.
The strength and rigidity of the paper pallet 11 can be further improved.

In the above embodiments, the lower surface member 17 of the upper plate member 12 and the upper surface member 19 of the lower plate member 13 are used.
However, although the description has been given of the case where each of the recesses has ten recesses 17a and 19a, the number is not limited. Further, the numbers and the arrangement positions of the vertical girder members 15 and the horizontal girder members 16 are not particularly limited, and can be appropriately changed according to the purpose of use.

In the above-described embodiments, the lower plate member 13 also has a rectangular wavy upper surface member 1 like the upper plate member 12.
The case where the lower plate member 13 is composed of only the lower surface member 20 is described as long as sufficient strength can be obtained only with the upper surface member 12. The entire lower plate member 13 may be omitted.

In the above-described embodiments, the case where the fork pocket 25 is provided only in the horizontal girder member 16 has been described. At this time, the lower plate member 13 is rotated 90 degrees around the vertical axis so that the extending direction of the uneven shape of the upper surface member 19 is orthogonal to the extending direction of the uneven shape of the lower surface member 17 of the upper plate member 12. It may be.

Although not particularly described in the above embodiments, a plastic film is laminated on the surface of each component of the paper pallet 11 or silicon or the like is coated on the outer surface of the paper pallet 11. Alternatively, the paper pallet 11 may be made water-resistant. Thus, even when the paper pallet 11 is used outdoors in rainy weather, sufficient strength and shape stability can be ensured.

[0041]

As described above, according to the present invention, a girder member formed by making any number of vertical girder members and horizontal girder members orthogonal to the plate thickness direction and a top surface side of the girder member are provided. An upper plate member arranged and fixed is provided, a fork pocket for inserting a fork of a forklift is provided in at least one of the two girder members, and an upper edge of the fork pocket is connected to a lower surface of the upper plate member. The upper plate member is supported from the lower surface side by the girder member formed by framing the vertical girder member and the horizontal girder member in a lattice shape because they are made substantially flush. For this reason, sufficient strength and shape stability can be secured only with paper material without reinforcing with metal material, and since the upper plate member is reinforced with the girder member, it is configured with a small amount of material and light weight. be able to.

According to the present invention, the upper plate member is constituted by a lower surface member obtained by bending a flat plate material into a rectangular wave shape and a flat upper surface member fixed to the upper surface of the lower surface member. The member itself can have sufficient strength and shape stability.

According to the present invention, since an arbitrary number of engagement projections corresponding to the concave and convex shape of the lower surface of the lower surface member are provided on the upper edge of the vertical girder member, a load is obliquely applied to the upper plate member. Even in this case, it is possible to stabilize the shape of the rectangular wave-shaped lower surface member, and to prevent a reduction in strength as a pallet.

According to the present invention, the cross beam is disposed at the concave position above the lower surface of the lower surface member, and the upper edge thereof is brought into contact with the lower surface material. It is supported by the horizontal girder material, whereby the bending of the upper plate member can be more effectively prevented, and the integral strength of the girder member and the upper plate member can be improved.

According to the present invention, since the lower plate member is arranged and fixed on the lower surface side of the spar member, the spar member is sandwiched from above and below by the two plate members, and the strength and shape stability as a pallet are obtained. In addition, it is possible to further improve the properties and stabilize the framework state of the vertical beam members and the horizontal beam members.

According to the present invention, the lower plate member is constituted by an upper surface member obtained by bending a flat plate material into a rectangular wave shape and a flat lower surface member fixed to the lower surface of the upper surface member. The plate member can also have sufficient strength and shape stability.

According to the present invention, since an arbitrary number of engagement projections corresponding to the uneven shape of the upper surface of the upper surface member are provided on the lower edge of the vertical girder member, a load is obliquely applied to the lower plate member. Even in this case, it is possible to stabilize the shape of the rectangular wave-shaped upper surface material and prevent the strength of the pallet from lowering.

According to the present invention, since the horizontal beam is disposed at the concave position below the upper surface of the upper member and the lower edge thereof is brought into contact with the upper member, the integral strength of the lower plate member and the beam member is improved. And the deflection of the pallet can be more completely prevented.

Further, in the present invention, since the constituent members of the pallet are made water-resistant, sufficient strength and shape stability can be ensured even when used outdoors in rainy weather.

[Brief description of the drawings]

FIG. 1 is a front view showing a paper pallet according to a first embodiment of the present invention.

FIG. 2 is an exploded view of FIG.

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is an exploded view of FIG.

FIG. 5 is a structural view of the girder member as viewed from above in FIG. 1;

FIG. 6 is a main part configuration diagram showing a second embodiment of the present invention.

FIG. 7 is a front view showing a conventional paper pallet.

FIG. 8 is a plan view of FIG. 7;

[Explanation of symbols]

 Reference Signs List 11 paper pallet 12 upper plate member 13 lower plate member 14 girder member 15 vertical girder member 16 horizontal girder member 17, 20 lower surface member 17a, 19a recessed part 18, 19 upper surface member 22, 23 engagement protrusion 25 fork pocket 30 deformation prevention member

Claims (9)

[Claims] 1. A girder member composed of an arbitrary number of vertical girder members and horizontal girder members orthogonal to the plate thickness direction, and an upper plate member arranged and fixed on the upper surface side of the girder member. At least one of the two beam members has a fork pocket for inserting a fork of a forklift, and an upper edge of the fork pocket is substantially flush with a lower surface of the upper plate member. A paper pallet characterized by the following. 2. An upper plate member comprising: a lower surface member obtained by bending a flat plate material into a rectangular wave shape; and a flat upper surface member fixed to an upper surface of the lower surface member. Paper pallet. 3. The paper pallet according to claim 2, wherein the vertical girder member has an arbitrary number of engagement projections on the upper edge thereof corresponding to the uneven shape of the lower surface of the lower surface member. 4. The paper pallet according to claim 2, wherein the cross beam is disposed at a concave position above the lower surface of the lower surface material, and an upper edge thereof is in contact with the lower surface material. 5. The girder member includes a lower plate member disposed and fixed on a lower surface side thereof.
The paper pallet according to 3 or 4. 6. The lower plate member according to claim 5, wherein the lower plate member includes an upper surface member obtained by bending a flat plate member into a rectangular wave shape, and a flat lower surface member fixed to a lower surface of the upper surface member. Paper pallet. 7. The paper pallet according to claim 6, wherein the longitudinal beam has an arbitrary number of engaging projections on the lower edge thereof corresponding to the uneven shape of the upper surface of the upper material. 8. The paper pallet according to claim 6, wherein the cross beam is disposed at a recessed position below the upper surface of the upper surface material, and a lower edge thereof is in contact with the upper surface material. 9. The pallet according to claim 1, wherein each component is made water-resistant.
Or a paper pallet according to 8.