JPH0752948A - Paper-made pallet - Google Patents

Abstract

PURPOSE:To enhance the integrality and strength of a paper-made pallet and especially improve the integrality between a deck board and a leg member. CONSTITUTION:A paper-made pallet 1 consists of a deck board 2 composed of a honeycomb structure member 21, and a leg member 3 composed of honeycomb structure members 31. The leg member 3 is wrapped with a rear sheet 5 and bonded on the deck board 2. The lower parts of side faces 22b and 22e of a surface sheet 22 of the deck board 2 and side faces 53a and 56a (hatched parts) of the rear sheet 5 are overlapped and bonded together. Tuck flaps 22f and 22g of the surface sheet 22 are folded under the rear of the rear sheet 5 and bonded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pallet used for carrying a load by a forklift or the like. More particularly, the present invention relates to paper pallets that have excellent strength and integrity.

[0002]

2. Description of the Related Art Pallets are used for loading and unloading trucks, ships, airplanes, etc., or for transporting luggage by these. Conventionally, wooden pallets are generally used. In addition, pallets made of steel, plastic, aluminum, etc. are also used. However, since pallets made of these materials are generally heavy,
For example, when carrying a large amount of luggage, the weight of the pallet itself may limit the amount of luggage that can be carried. Also, some of these pallets are expensive and are typically used repeatedly. In this case, after unloading the baggage at the destination, only the pallet needs to be sent back to the shipping place again, and the transportation fee for that purpose cannot be ignored. Further, in the case of repeated use, it is necessary to repair the damaged one at the time of use, and the cost for that is also increased. On the other hand, in recent years, the use of wood has been particularly shunned from the viewpoint of environmental resource protection, and the use of wooden pallets is not preferable also from this point. In addition, the current situation is that there is a problem in the disposal of wooden pallets.

In order to solve the problem of the pallet made of such a material, a lightweight, inexpensive and disposable paper pallet has been used in recent years. This paper pallet is recyclable and is a resource-saving product. Similar to a wooden pallet, a paper pallet is generally composed of a deck board portion on which luggage is loaded and leg portions forming a space for inserting a fork such as a forklift truck on the back surface thereof.

A problem with paper pallets is that they generally have lower strength and rigidity than wooden pallets. For this purpose, for example, Japanese Patent Laid-Open No. 61-28754.
In Japanese Patent Laid-Open Publication No. 1-58, it has been proposed to increase the strength of a deck board by using a honeycomb core. Further, in Japanese Utility Model Laid-Open No. 61-66126 and Japanese Utility Model Publication No. 58-1478, it is proposed to increase the strength of a pallet made of corrugated board by making the wave directions of the upper and lower corrugated boards orthogonal to each other. There is.

[0005]

As described above, various methods have been proposed for increasing the strength of the paper pallet. However, at present, no paper pallet having a strength comparable to or close to that of a wooden pallet has been proposed. In particular, in a paper pallet, each part constituting the pallet is adhered by an adhesive, but there is a high possibility that the adhered part is peeled off and the pallet is damaged. In particular, there is a high risk that the leg portion adhered to the back surface of the deck board will be peeled off from the deck board by the lateral force of the pallet.

In view of the above problems, an object of the present invention is to propose a paper pallet having sufficient strength and capable of enhancing the integrity of the deck board and the leg portion.

[0007]

In order to solve the above-mentioned problems, in the paper pallet of the present invention, the deck board and the leg material adhered to the back surface of the pallet are cored with a paper honeycomb structure. In addition to the material, one back sheet is adhered to the back side of the deck board while enclosing the back and side surfaces of the leg material.

When the paper pallet is constructed in this way, the strength of the deck board and the leg members can be made sufficient by the honeycomb structure. In addition, since the leg material is adhered to the back side of the deck board in the state of being wrapped in one back sheet, the joining strength between the deck board and the leg material is increased and the leg material does not come off from the deck board. .

In order to further increase the strength of the pallet, it is desirable to cover the surface of the deck board with a surface sheet. Furthermore, if the front surface sheet and the back surface sheet are overlapped and bonded to each other on the side surface of the deck board, the strength of the pallet can be further increased. Further, it is preferable to extend a part of the surface sheet to the back surface side of the deck board and adhere to it.

Corrugated plates can be used as the top sheet and the back sheet. In this case, the strength of the pallet can be increased by arranging the waves (flutes) so that the directions thereof are different directions, usually orthogonal directions.

Further, it is desirable that the surface sheet or the back sheet, or both of these sheets, be subjected to a surface treatment for enhancing the weather resistance, the friction property and the like. Instead of these, a water repellent base paper, a water resistant base paper, or the like may be used as these sheets.

Here, when constructing a two-way pallet to which the present invention is applied, at least three legs are
It may be arranged parallel to both sides and the center of the back surface of the deck board.

On the other hand, in order to construct a four-way insertion pallet, at least three independent pedestals are provided on both sides of the pallet thus constructed on the back surface of the pedestal. And by adhering to the center, these independent leg members may form a space for inserting a fork from an orthogonal direction. Instead of this, each leg is cut in at least two places at a height of approximately half its height in a direction orthogonal to this, with these notches providing a space for inserting the fork. You may form.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

First Embodiment FIGS. 1 to 6 show a two-sided paper pallet according to one embodiment of the present invention.

(Overall Structure) FIG. 1 is an external perspective view showing the entire paper pallet 1 of this example. As shown in this figure, a paper pallet 1 of this example includes a deck board 2 having a substantially square shape and a constant thickness, and three legs 3 (3-1, 3 having a rectangular cross section) attached to the back surface of the deck board 2. -2, 3-3).

FIG. 2 shows the components of the paper pallet 1 in a disassembled state. Explaining with reference to this figure, the deck board 2 of the paper pallet 1 of this example comprises a paper honeycomb structure 21 having a constant thickness, for example, a square, and a surface sheet 22 made of a corrugated plate adhered to the upper surface thereof. It is configured. The paper honeycomb structure 21 is composed of a honeycomb core material 21a, and an upper sheet 21b and a lower sheet 21c made of kraft paper and the like, which are adhered to the upper and lower sides of the honeycomb core material 21a.

The three legs 3 have the same structure and are formed from a rectangular paper honeycomb structure 31 having a constant thickness. The structure 31 is bonded to the honeycomb core member 31a and above and below it. It is composed of an upper sheet 31b and a lower sheet 31c made of kraft paper or the like. These legs 3 are
The upper sheet 31b is joined to the lower sheet 21c on the deck board 2 side with an adhesive. In this example, the three legs 3 are arranged in parallel on both sides and in the center of the back surface of the deck board 2, whereby a space into which a fork such as a forklift can be inserted in the direction indicated by the arrow A between them. 4 are formed.

Here, in the present example, these leg members 3
Is wrapped with one back sheet 5. The back sheet 5 is obtained by bending a single corrugated plate into the state shown in FIG.

(Shape of Top Sheet) The shape of the top sheet 22 will be described in detail with reference to FIG. Top sheet 22
Is a square main body portion 22a forming the surface of the deck board 2 and side surface portions 22b, 22 formed on the four sides.
It has c, 22d, and 22e. The side surface portion is set to have a width capable of completely covering the side surface of the honeycomb structure 21. A pair of ears 22f and 22g that can be bent toward the back surface of the back sheet 5 are formed at the edges of the side surface portions 22c and 22e on the side where the ends of the leg members 3 are located.

The sheet material cut out in such a shape from one corrugated plate is mountain-folded at a right angle at a mountain-folding position 22h shown by a dotted line in FIG.
The shape shown in can be formed. In this state, the honeycomb structure 21 can be housed inside, and the main body portion 22a
The upper surface and the side surface of the honeycomb structure 21 can be bonded to the back surface and the inner surface of the side surface portions 22b to 22e, respectively.

Further, as will be described later, after the leg material 3 and the back sheet 5 are adhered to the back surface of the deck board 2, the ears 22f and 22g are bent at right angles at the mountain folding positions 22i shown by the dotted lines. Can be bonded to the back surface side of the back sheet 5.

In the present example, this surface sheet 2
The direction of the wave of No. 2 is the direction shown by arrow B in FIG. In addition, the surface of the topsheet 22 is subjected to a water-repellent laminating process to enhance water resistance.

(Shape of Back Sheet) The shape of the back sheet 5 will be described with reference to FIGS. 2, 4 and 5. The back sheet 5 can be formed by bending a sheet material 51 made of a corrugated plate cut out in the shape shown in FIG. That is, as shown in FIG. 4, the sheet material 51 is
A rectangular main body portion 52, side surface portions 53, 54 continuously formed on both sides in the longitudinal direction, and three side surface portions 55 (55-55) continuously formed on both sides in the lateral direction.
1, 55-2, 55-3), 56 (56-1, 56-)
2, 56-3).

By bending this sheet material 51 along the mountain fold position shown by the dotted line in FIG. 4 and the valley fold position shown by the alternate long and short dash line, as shown in FIG.
Recesses 3a, 3b, 3c of rectangular cross section that can accommodate
Can be formed. Here, each side surface portion 53, 54, 55,
The width of 56 is set to be longer than the height of the leg member 3 by the amount shown by the diagonal lines. These shaded portions 53a, 54
For example, a, 55a, and 56a have a width corresponding to the thickness of the honeycomb structure 21 on the deck board 2 side, and can cover the side surface of the honeycomb structure 21 on the deck board 2 side. Therefore, these shaded portions can be adhered to the side surface of the honeycomb structure 21 on the deck board side, and the outer side surfaces thereof are overlapped with the side surface portions 22a to 22d on the side of the surface sheet 2 described above. Can be glued.

In this example, this back sheet 5
The direction of the wave is indicated by the arrow C in FIG.

(Assembled State) A state will be described in which the paper pallet 1 of the present example in which the respective parts are constructed in this way is combined with an adhesive. As shown in FIG.
When the back sheet 5 is bent and then these are stacked and adhered, a state as shown in FIG. 6 is obtained. That is, each leg member 3 has its back surface and both longitudinal side surfaces,
The back sheet 5 is wrapped and adhered to the inner surface of the back sheet 5. Further, the side surface portions 53, 54, 55, 56 of the back sheet 5 have slanted portions 53a to 56a (see FIG. 2) extending upward beyond the leg members 3, and these slanted portions are the decks. The side surface of the honeycomb structure 21 on the board 2 side is covered, and in this state, it is bonded to the side surface. Further, the side surface portions 22b to 22e of the topsheet 2 extend to the outer surface side of the shaded portions 53a to 56a bonded to the side surfaces of the honeycomb structure 21 as described above,
These are adhered in a state where they overlap each other. In addition to this, the ears 22f and 22g of the topsheet 22 are
It is adhered to the back surface side of the back sheet 5.

As described above, in the paper pallet 1 of this embodiment, each leg member 3 is wrapped by one back sheet 5, and in this state, it is adhered to the deck board 2 side. Therefore, there is an advantage that the integrity of the deck board 2 and the leg members 3 is excellent. Also, the top sheet 22
Of the back sheet 5 and the side surface of the back sheet 5 are adhered to each other in an overlapped state.
Since f and 22g are formed and these are adhered to the back surface side of the back sheet, the integrity of the entire paper pallet can be further enhanced. Furthermore, since the wave direction of the top sheet 22 and the wave direction of the back sheet 5 are orthogonal to each other, this also increases the strength of the paper pallet.

In this example, the surface of the topsheet 22 is water-repellent laminated. However, in addition to this, for example, abrasion resistance is provided so that a load placed on the topsheet 22 does not easily slip off. Needless to say, a surface treatment that enhances the surface treatment may be performed.

Second Embodiment FIGS. 7 and 8 show a modification of the first embodiment. In the examples shown in these figures, the paper pallet 1 of the first embodiment is a four-way pallet. Therefore, in this example, the leg members 3 of the paper pallet 1 shown in FIG. 1 are used.
Nine independent leg members 7 are bonded to the back side of the. FIG. 8 is a rear view of the paper pallet 10 to which the independent leg members 7 are attached in this manner. In the paper pallet 10 of this example, the fork can be inserted not only from the direction of arrow A but also from the direction shown by arrow D orthogonal to this.

Third Embodiment FIGS. 9 and 10 show another embodiment of a paper pallet for four-way insertion. The basic structure of the paper pallet 20 shown in these figures is the same as that of the pallet 1 of the first embodiment. However, in this example, the leg member 30 is formed to have a high height, for example, about 90 mm, and rectangular notches 31 having a height of, for example, about 50 mm are formed on these side surfaces. That is, after the pallet is manufactured as shown in FIG. 9, the hatched portion is cut away from the side to obtain a four-way pallet as shown in FIG.

Fourth Embodiment Next, FIGS. 11 and 12 show another modification of the first embodiment. The paper pallet 100 of this modified example is obtained by omitting the surface sheet 22 from the paper pallet 1 of the first embodiment. Since the topsheet 22 is omitted, the side surface portion of the backsheet 5 is extended to the length covering the four peripheral edges on the front surface side of the deck board 2 and adhered to the four peripheral edges. Even when the topsheet is omitted in this way, it is possible to realize an inexpensive pallet that has sufficient strength and can be used for carrying light loads, although it is inferior to the pallet of the first embodiment. In addition, in FIGS.
The parts corresponding to those of the pallet of the first embodiment are designated by the same reference numerals.

[0033]

As described above, in the paper pallet of the present invention, the deck board and legs are made of a paper honeycomb structure as a core material, and the legs are made of one back sheet. Adopted on the back side of the deck board in a wrapped state. Therefore, the integrity of the deck board and the leg material can be enhanced.

Further, since the side surface of the top sheet of the deck board and the side surface of the back sheet are superposed and adhered to each other, the integrity and strength of the entire pallet can be further enhanced.

Further, since a part of the topsheet is extended to the backside of the backsheet and adhered thereto, the integrity and strength of the pallet can be further enhanced.

In the paper pallet of the present invention, a pallet for four-way insertion can be easily prepared by adhering an independent leg member to the back side of the leg member or notching the high leg member. There is also an advantage that it can be manufactured.

[Brief description of drawings]

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

FIG. 2 is an exploded perspective view of the paper pallet shown in FIG.

FIG. 3 is a front view showing a developed surface sheet of the pallet of FIG.

FIG. 4 is a front view showing a developed back sheet of the pallet of FIG.

5 is an explanatory diagram for explaining a state in which the back sheet of FIG. 4 is folded.

6 is a cross-sectional view of the pallet of FIG.

FIG. 7 is an external perspective view showing a paper pallet according to a second embodiment of the present invention.

8 is a rear view of the pallet of FIG. 7.

FIG. 9 is an external perspective view showing the manufacturing process of the paper pallet according to the third embodiment of the present invention.

10 is an external perspective view of the pallet of FIG.

FIG. 11 is an external perspective view of a paper pallet according to a fourth embodiment of the present invention.

FIG. 12 is an exploded perspective view of the pallet of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Paper pallet 2 ... Deck board 21 ... Paper honeycomb structure 21a ... Honeycomb core material 21b, 21c ... Sheet 22 ... Surface sheet 22b, 22c, 22d, 22e. ..Side surface portions 22f, 22g ... Ear portions 3 ... Leg material 31 ... Honeycomb structure 31a ... Honeycomb core material 31b, 31c ... Sheet 5 ... Back sheet 53, 54, 55 , 56 ... Side portions 53a, 54a, 55a, 56a ... Shaded portions (overlapping portions)

Claims (9)

[Claims] 1. A deck board having a paper honeycomb structure as a core material, a leg material having a rectangular cross section having a paper honeycomb structure bonded to the back surface of the deck board as a core material, and the foot material. A pallet made of paper, which is adhered to the backside and both side surfaces of the deckboard and is adhered to at least the backside of the deck board. 2. The paper pallet according to claim 1, wherein the surface of the deck board is covered with a surface sheet adhered thereto. 3. The back sheet according to claim 2, wherein the back sheet has a side surface portion that covers at least a part of a side surface of the leg member and a side surface of the deck board,
The side surface portion is adhered to the side surface of the deck board, and the front surface sheet has a side surface portion that overlaps at least a part of the side surface portion of the back sheet, and the side surface portion is adhered to the side surface portion of the back surface sheet. Paper pallet characterized by being 4. The surface sheet according to claim 2 or 3, wherein the topsheet has an extension portion extending to the back surface side of the deck board, and the extension portion is adhered to the back surface of the deck board. Paper pallet to be used. 5. The paper pallet according to claim 2, 3 or 4, wherein the top sheet and the back sheet are corrugated plates, and the corrugated plates have different wave directions. 6. The surface sheet according to claim 2, wherein at least one of the top sheet and the back sheet is surface-treated to enhance weather resistance, friction resistance and the like. Alternatively, a paper pallet that is a sheet made of water-repellent base paper, water-resistant base paper, or the like. 7. The back surface of any one of claims 1 to 6, wherein at least three of the legs are arranged parallel to both sides and the center of the back side of the deck board. A two-way paper pallet characterized in that both sides are covered with one back sheet, and a fork can be inserted between these legs. 8. The leg member covered with the back sheet according to claim 7, wherein at least three independent leg members are provided on both sides of the leg member covered with the back sheet in the longitudinal direction. And the center are adhered.These leg members are constructed by using a paper honeycomb structure as a core member, and the independent leg members form a space for inserting a fork. Paper pallet for use. 9. The leg member covered with the back sheet according to claim 7, wherein at least two notches each having a height lower than the height of the leg member are oriented in a direction orthogonal to the leg member.
A paper pallet for four-way insertion characterized in that a space for inserting a fork is formed by the notch formed at a portion.