JP4216381B2 - Plastic pallet - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin pallet on which articles are placed for transportation, storage and the like.
[0002]
[Prior art]
Conventionally, in order to reduce the weight of the synthetic resin pallet, the thickness of the deck board is reduced, while from the viewpoint of increasing the strength, the thickness of the girders connecting the upper and lower deck boards is increased. A synthetic resin pallet is known in which ribs are formed along diagonal lines in a corner beam located at a corner of the pallet.
[0003]
[Problems to be solved by the invention]
When a synthetic resin pallet falls for some reason, it often falls from the corner. However, in the above-mentioned conventional synthetic resin pallet, the thickness of the deck board is thin, so it is made of synthetic resin. When the pallet falls, there is a problem that the deck board of the corner girder portion of the synthetic resin pallet breaks.
[0004]
Further, in the above-described conventional synthetic resin pallet, since the thickness of the deck board is thin, in particular, to the gap portion of the mold that forms the deck board of the corner beam portion located at the corner of the synthetic resin pallet. It was difficult to fill the molten resin, and there was a problem that voids and welds were formed in this part, and that a thinner part was formed in this part.
[0005]
An object of the present invention is to solve the problems of the conventional synthetic resin pallet described above and to provide a synthetic resin pallet that achieves both weight reduction and strength.
[0006]
[Means for Solving the Problems]
In order to achieve the above-described object, the present invention is directed to inwardly only the upper and lower deck boards positioned at the corners of the corner beams, surrounded by the peripheral wall and the predetermined ribs positioned in the corner beams . respectively by a uniform wall thickness of the thick, up and down the deck board positioned on the corners of Sumiketa, in part, in which, respectively, form a uniform thickness portion of the thickness.
[0007]
【Example】
First, a synthetic resin pallet P as an example will be described with reference to FIG.
[0008]
Reference numeral 1 denotes an upper deck board, and 1 'denotes a lower deck board, which are formed in the same shape by injection molding or the like. The half-girder parts 1a, 1a 'of the upper deck board 1 and the lower deck board 1', and the half-girder parts 1b, 1b 'of the intermediate girder located between the half-girder parts 1a, 1a' of the corner girder, A cylindrical corner girder p1, a cylindrical intermediate girder p2, and a central girder (not shown) are provided by melting and joining the half parts of the central girder located in the central part at the respective end faces. A synthetic resin pallet P is formed. A fork insertion port p3 is formed between the corner beam p1 and the intermediate beam p2. Hereinafter, the upper deck board 1 and the lower deck board 1 ′ are simply referred to as a deck board p4.
[0009]
p5 and p6 are partition ribs extending from the substantially central portion of the cylindrical corner beam p1 to the upper and lower deck boards p4, and p7 is perpendicular to the deck board p4 surface in the corner beam p1. In addition, the rib is a low rib extending vertically and horizontally, and p8 is a rib having a low height extending in the vertical direction on the inner peripheral wall of the cylindrical corner beam p1. p9 and p10 are cross ribs formed vertically and horizontally on the inner surface of the deck board p4 other than the corner beam p1, the intermediate beam p2, and the central beam.
[0010]
p11 is a thick part of the deck board p4 formed at the corner where the corner beam p1 of the synthetic resin pallet P is located. In this embodiment, the peripheral wall p12, the partition rib p5, and the peripheral wall p12 of the deck board p4. When the portion of the deck board p4 surrounded by the extension line of the rib 8 closest to is thickened inward, a thick portion p11 is formed. Thus, by forming the thick portion p11 on the deck board p4 located at the corner of the synthetic resin pallet P, the impact strength of the corner of the synthetic resin pallet P can be improved.
[0011]
2, when there is one of a plurality of molten resin gates of the injection molding machine at a position indicated by G, the molten resin injected from the gate G into the mold is centered on the gate G. However, the corner of the deck board p4 is far from the gate G, and the thickness of the deck board p4 in this portion is conventionally thin. However, the molten resin is difficult to reach, and there are problems such as formation of voids and formation of thinner portions in this portion, and the impact strength of the corner portion of the synthetic resin pallet P is made weaker. However, as in the present invention, in order to form the thick portion p11 on the deck board p4 located at the corner of the synthetic resin pallet P, the molten resin injected from the gate G by widening the mold gap. However, this part is surely spread and the moldability of the synthetic resin pallet P by injection molding is improved. In addition, since the molten resin may be difficult to reach because the portion located between the plurality of gates is separated from any of the gates, it is possible to inject from the gate G by widening the mold gap in such a portion. The molten resin thus spread can be surely spread over this portion, and the moldability of the synthetic resin pallet P by injection molding can be improved.
[0012]
【The invention's effect】
Since the present invention has the above-described configuration, the following effects can be achieved.
[0013]
The impact strength of the corners of the synthetic resin pallet can be improved, and the moldability of the synthetic resin pallet by injection molding is improved.
[Brief description of the drawings]
FIG. 1 is a perspective view of a synthetic resin pallet according to the present invention.
FIG. 2 is a plan view of a lower deck board constituting the synthetic resin pallet of the present invention.
FIG. 3 is a vertical sectional view of the synthetic resin pallet along the line II in FIG. 2;
[Explanation of symbols]
P ... Plastic plastic pallet p4 ... Deckboard p11 ... Thick part

Claims (1)

By making only the upper and lower deck boards located at the corners of the corner girders, surrounded by the peripheral wall and the predetermined ribs located in the corner girders , inward, with a uniform thickness A synthetic resin pallet characterized in that a thick part having a uniform thickness is partially formed on the upper and lower deck boards located at the corners of the corner beam.

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