JPS6028577Y2 - Structure of welded parts of synthetic resin pallets - Google Patents

Description

[Detailed description of the invention] The present invention relates to a pallet for transporting cargo, and in particular, a synthetic resin pallet using a manufacturing method in which each divided piece is manufactured in advance and the divided pieces are welded together to complete the pallet. The purpose is to obtain a strong weld structure in the process.

In recent years, synthetic resin pallets have been used as they have superior durability and stain resistance compared to wooden and metal pallets. Due to the nature of synthetic resin, there are difficulties in strength and moldability, and to solve this problem, the pallet is manufactured by dividing it into several pieces, and then each piece is welded together to complete the pallet body. In many cases, manufacturing methods are used.

Moreover, in order to improve the strength, each divided piece has a hollow double structure, and this hollow part is reinforced by appropriately provided vertical ribs.

However, as shown in FIG. 1, when a load W is applied from above to the welded surface A, a tensile force is generated on the welded surface, causing damage or peeling of the welded surface.

Measures to prevent these include increasing the thickness of the vertical ribs and/or horizontal ribs, or increasing the number of ribs, but all of these methods increase the weight of the product and reduce formability.
Furthermore, there is a problem in that this causes an increase in the unit price of the product.

The present invention aims to provide a structure of a welded part that solves the above-mentioned problems.The embodiment shown below will be explained below. Figure 2 shows an example of the structure of the welded part of the present invention before welding assembly. FIG. 3 and FIG. 4 are an enlarged front view and a cross-sectional view of the main parts.

The pallet is divided by cutting planes parallel to and perpendicular to the frontage XX direction, with beams 1 and 1' on both sides, intermediate beams 2,
It consists of five welded parts: 2' and central beam 3.

Both side beams 1, 1' have upper and lower deck board parts 4, 4',
A central block 5 and both side blocks 6 and 6' are provided with open fork insertion holes 7 and 7' between them, and inside each deck board section and each block is a small compartment 8 that is open to the inside.
is formed by vertical ribs 9, 9'.

As shown in the figure, in the present invention, the same
It is characterized by the provision of an auxiliary rib 10 which forms a welding surface.It is desirable that the dimensions of the height h and depth 1 of the auxiliary rib 10 be equal to or less than half the height H of the small compartment 8.

The above description has been made regarding an embodiment in which the auxiliary ribs 10 are provided in the small compartments 8 of the lower deck board parts 4' of both side beams, but the auxiliary ribs 10 can also be provided in the small compartments of the upper deck board part 4 and each block. Of course.

Similarly, auxiliary ribs 10' are also provided in the sub-chambers 8' of the intermediate beams 2, 2', and may be provided in the sub-chambers of the central beam 3 if necessary.

As described above, the present invention provides an auxiliary rib inside the compartment, which not only increases the welding area and improves the strength of the welded part, but also allows the auxiliary rib and the outer wall (or horizontal rib) 11 to form a T-shape. , the force applied to the welded surface is reduced, and peeling and damage of the welded surface can be prevented.

Further, since the thickness of the vertical ribs and horizontal ribs is not increased by merely providing the auxiliary ribs, the weight of the product does not increase or the moldability decreases.

Furthermore, since the pitch of the auxiliary ribs can be narrowed, it has great practical effects, such as strengthening the strength against impacts and concentrated loads.

[Brief explanation of the drawing]

Fig. 1 is a front view of a synthetic resin pallet, Fig. 2 is a perspective view showing the structure of the welded parts of the divided pieces before welding and joining, Fig. 3 is an enlarged partial front view of the main parts, and Fig. 4 is the third It is a sectional view taken along the line A-A. 4.4'...Deck board section, 5...
Center block, 6, 6'...Both sides blocks, 7
,7'...0. Fork insertion hole, 8...small compartment, 9,9'...surrounding rib, 10...auxiliary rib.

Claims (1)

[Scope of utility model registration request] In a synthetic resin pallet in which a plurality of divided welded parts having small compartments are integrally welded and the small compartments are formed into a hollow body, auxiliary ribs are provided at least in the lower deck board part or in the small compartments of each block. The structure of the welded part of a synthetic resin pallet is characterized by: