JPH1045131A - Pallet made of plastic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the strength of a connecting portion of a lower deck board with each support, lower the height of the lower deck board and make each fork insertion port larger by forming the connecting portion of the lower deck board facing each fork insertion port with each support into a thick-walled part and providing deformation-preventing holes in the thick-walled part. SOLUTION: An upper deck board 21 and a lower deck board 23 are connected to each other with supports 25 provided at four corners and intermediate supports 27 provided in intermediate positions among the supports 25, and a four-side insertable pallet 20 is formed in which each gap surrounded by the upper and lower deck boards 21, 23 and the supports 25, 27 are used as a fork insertion port 29. A specific range at the connecting portions of a lower deck board part 23a at the fork insertion port 29 with each support 25 and with each intermediate support 27 is formed into a thickwalled part 37, and, in order to prevent deformation at the molding time of the pallet, small circular holes 39 are provided in each thick-walled part 37. By this method, the height of the lower deck board part 23a can be made lower, and the height of each fork insertion port 29 can be made higher by that which corresponds to the lowering of the height of the lower deck board part 23a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic pallet for a forklift used for storing and transporting luggage, and more particularly to a plastic pallet suitable for use with a handlift.

[0002]

2. Description of the Related Art Conventionally, plastic pallets for storing and transporting luggage have been widely used because of their excellent corrosion resistance and contamination resistance. This kind of pallet connects the upper deck board and the lower deck board with the pillars of the hollow structure arranged at both ends and the intermediate part, and the space surrounded by the pillars and the upper and lower deck boards is used for the fork of the forklift. It has a fork insertion slot. FIG. 6 is a perspective view showing an example of a conventional four-sided pallet. The four-sided pallet 1 is provided with a pillar 7 at the four corners of the upper deck board 3 and the lower deck board 5 and an intermediate pillar 9 in the middle thereof. And

[0003] The upper deck board 3 of the plastic pallet 1 is entirely formed on a smooth surface for placing and storing luggage. However, a hand lift (a small manual forklift) or a pallet truck is used. In order to enable the use of the lower deck board 5, a relatively large opening 11 is provided in a portion surrounded by each of the pillars, and the lower deck board 5 is provided so as to connect the pillars vertically and horizontally.

[0004]

In such a pallet having a relatively large opening 11 in a portion surrounded by each of the columns, the height of the lower deck board is increased in order to facilitate insertion of a hand lift. It is desirable to be as low as possible. If the height of the lower deck board is reduced, the insertion of the hand lift becomes easy, and the carrying work by the hand lift can be efficiently performed. However, simply lowering the height of the lower deck board will reduce the strength of the lower deck board and, consequently, the strength of the entire pallet. Accordingly, the present invention provides a plastic pallet that can withstand the use of a hand lift.

[0005]

The present invention has the following configuration to achieve the above object. In other words, the plastic pallet according to claim 1 of the present invention is a four-sided pallet in which a separately molded upper part and a lower part are welded at the end face of a pillar part, and a pillar part is provided at four corners and an intermediate part thereof. The connecting portion of the lower deck board with the support portion is made thick with a constant width, and a hole for preventing deformation is provided in the thick portion. Further, in the plastic pallet according to the second aspect, the lower deck board facing the fork insertion port in one direction has a thick portion with a fixed width at a connection portion with the support portion, and the thick portion has The lower fork hole is formed higher than the height of the lower deck board in the other direction, and the height of the fork insertion hole is formed higher by the lower height of the lower deck board. I do. Further, the plastic pallet according to the third aspect is characterized in that protrusions protruding in the horizontal direction from the outer surfaces of the pillars are provided at the upper and lower edges of the pallet.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention. 1 is a front view of the pallet, FIG. 2 is a bottom view of the upper half, and a plan view of the lower half. FIG. 3 is a cross-sectional view taken along the line AA of FIG. 1 and FIG. 4 is a cross-sectional view taken along the line B-B of FIG. 5 is a cross-sectional view taken along the line CC of FIG. 2. The pallet 20 is formed by connecting the upper deck board 21 and the lower deck board 23 with four corner pillars 25 and an intermediate pillar 27 provided therebetween, and the upper and lower deck boards 21 and 23 and the pillar 25 and the pillar 27. This is a four-sided pallet in which the gap surrounded by the fork insertion port 29 is defined.
The pallet 20 includes an upper part having an upper deck board that is divided and formed in a horizontal direction at a substantially central portion of each pillar in advance,
A lower part having a lower deck board is butted and welded to a support part at a support part, and the support part has a hollow structure.

The upper deck board 21 includes a top plate 30 and reinforcing ribs 31 provided vertically and horizontally on the lower surface of the top plate 30. The lower deck board 23 is provided in a beam shape so as to connect the columns, and a portion surrounded by the columns has a large opening 33. Thus, opening 3
The provision of 3 makes it possible to use a hand lift. According to the present invention, in order to facilitate insertion of the hand lift, the lower deck board 23a at the front is made lower in height than the height of the lower deck board 23b at the side, and the lower deck board 23a has a structure having sufficient strength. The height of the fork insertion port 29 above the board 23a is increased by the amount by which the height of the lower deck board 23a is reduced.

That is, the lower deck board 23a has an upper surface which has a smooth curved surface in the fork insertion direction, and has a plurality of concave portions 35 provided on the lower surface. Recess 35
Has a rectangular shape, five rows in the fork insertion direction,
Four rows are provided in a direction orthogonal to the fork insertion direction. The size, number and arrangement of the recesses 35 are not particularly limited, and can be changed as appropriate.

Further, in the connection portion between the lower deck board 23a and the four pillars 25 and the intermediate pillars 27, a certain range is defined as the thick portion 37, and the thick portion 37 is deformed to prevent deformation during molding. A small circular hole 39 is provided as a hole for prevention. The circular hole 39 is provided to prevent deformation due to shrinkage of the thick portion 37 at the time of pallet molding. Therefore, the circular hole 39 is not necessarily limited to a circular shape, and may be an oval hole, a square, or a pentagon. And the like.

As described above, the connecting portion of the lower deck board 23a with the support portion is the thick portion 37 and the thick portion 37 is provided with the hole 39 for preventing deformation, so that the lower deck board 23a
Can be reduced, and the height of the fork insertion port can be increased by the lower deck board 23a. Therefore, the insertion of the hand lift is facilitated, and the strength of the lower deck board 23a and thus the strength of the entire pallet can be increased. The height of the lower deck board 23a is
Or less than half the height of

The lower deck board 23b is shown in FIGS.
As shown in (1), the upper surface has a smooth curved surface in the fork insertion direction, and the lower surface is provided with reinforcing ribs 40 vertically and horizontally. As is clear from FIGS. 3 and 5,
The lower deck board 23b is higher than the lower deck board 23a, and the height of the upper fork insertion port is lower.

The upper and lower edges of the pallet 20 are bordered by projecting portions 45 slightly horizontally projecting from the outer surfaces of the columns. in this way,
By fringing the periphery of the pallet with the protruding portion 45 that protrudes in the horizontal direction, the pallet is stored and transported in an upright state,
Alternatively, even if the ground is dragged, the outer surface of the column does not come into contact with the ground, so that there is no damage.

[0013]

According to the plastic pallet according to the present invention, the connecting portion of the lower deck board facing the fork insertion port in one direction with the support portion of the lower deck board has a thick portion, and a deformation preventing hole is formed in the thick portion. With the configuration, the strength of the connecting portion is improved, and the height of the lower deck board can be reduced. By lowering the height of the lower deck board, the fork insertion port becomes larger, and in combination with the lower height of the lower deck board, the insertion of the hand lift is further facilitated.

[Brief description of the drawings]

FIG. 1 is a front view of a pallet.

FIG. 2 is a bottom view of the upper half and a plan view of the lower half.

FIG. 3 is an enlarged sectional view taken along line AA of FIG. 2;

FIG. 4 is an enlarged cross-sectional view taken along a line BB in FIG. 2;

FIG. 5 is an enlarged cross-sectional view taken along line CC of FIG. 2;

FIG. 6 is a perspective view of a conventional four-sided pallet.

[Explanation of symbols]

 REFERENCE SIGNS LIST 20 pallet 21 upper deck board 23 lower deck board 25 four corner support parts 27 middle support part 29 fork insertion port 30 top plate 31 reinforcing rib 33 opening 35 reinforcing rib 37 thick part 39 deformation preventing hole 40 reinforcing rib 41 projecting Department

Claims (3)

[Claims] 1. A four-sided pallet in which an upper part and a lower part, which are separately formed, are welded to end surfaces of a pillar portion and pillar portions are provided at four corners and an intermediate portion thereof, and a connecting portion of the lower deck board to a pillar portion. A plastic pallet characterized by having a thick portion with a constant width and a hole for preventing deformation in the thick portion. 2. A lower deck board facing a fork insertion opening in one direction has a thick portion with a fixed width at a connecting portion with a support portion, and a hole for preventing deformation is provided in the thick portion. 2. The plastic according to claim 1, wherein the height of the lower deck board is formed lower than the height of the lower deck board in the other direction, and the height of the fork insertion port is formed higher by the lower height of the lower deck board. Pallets. 3. The plastic pallet according to claim 1, wherein projections projecting horizontally from the outer surfaces of the pillars are provided at the upper and lower edges of the pallet.