JPH0132100B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a deck board made of synthetic resin, which is formed by joining a supporting leg to a deck board, which has ribs formed on the back surface that extend continuously radially from the center to the outer edge by blow molding. Regarding palettes.

Conventional technology Synthetic resin pallets usually have a structure in which two boards constituting a deck board are joined at both ends and in the middle with mutually parallel girders, compared to conventional wooden or metal pallets. It is lighter than other deck boards and has excellent chemical resistance and moisture resistance due to its synthetic resin properties, but if the deck board has low bending rigidity, ribs etc. are provided on the deck board to reinforce it. .

Problems to be Solved by the Invention Among this type of synthetic resin pallets, so-called skid type pallets with legs have embossed ribs on the back of the deck board that are integrally molded in the same mold as the supporting legs, so the ribs are part of the supporting legs. When interrupted and loaded, the amount of deflection of the interrupted portion of the rib increases and deforms. Furthermore, since the ribs are installed in one direction, there is a directional difference in rigidity, and the insertion direction of the fork is limited to one direction, that is, it is limited to two-way insertion, and four-way insertion cannot be applied due to the rigidity balance. In addition, the supporting legs are easily damaged by the forks, and in this case, they cannot be replaced and the life of the pallet is short.

Means for Solving the Problems The object of the present invention is to provide an excellent pallet that retains the effects of synthetic resin pallets and eliminates the above-mentioned problems. A deck board made of synthetic resin, which has ribs on the back surface formed by molding, each consisting of a plurality of sealed hollow parts extending radially continuously from the center to the outer edge, and separate supporting legs molded separately and joined to each other. Regarding palettes.

To explain the embodiment of the present invention shown in the drawings, the pallet of the present invention, as shown in FIG. A fork is inserted into the gap C between the ground plane G and the ground plane G from the direction A or B or the opposite direction. As shown in FIG. 2, the back surface of the deck board 1 is alternately formed with hollow ribs 4 that continuously extend radially from the center to the outer edge, and groove portions 5. It is arranged by being screwed together.

The above-mentioned deck board 1 is formed by a hollow molding method so that the upper surface is shaped like a flat plate, a grid, or a drainboard, and the ribs 4 on the back surface have voids 6 as shown in FIG.
However, the cross section of the rib 4 is not limited to the one shown in the drawings, but may have a shape as shown in FIG. 7a or b. The thickness of the ribs 4 is approximately determined by the set weight of the pallet, and the number of ribs to be formed is preferably as large as possible within the moldable range.

Next, the supporting leg 2 is screwed together with the rib 4 and the threaded portion 3 provided on the supporting leg 2, as shown in Fig. 4, but the joining method is not limited to screwing, but fitting parts of matching shapes are used. It may be a fitted or bolted connection, but is preferably a threaded connection. In addition, supporting leg 2
The shape is not limited to that shown in the drawings, and may be, for example, cylindrical, truncated cone, polygon, ellipse, digit shape, etc., and the material may be plastic, wood, metal, etc., but hollow molding or Plastics that can be processed by injection molding are preferred, especially for the support legs 2.
In order to obtain a special cushion in which the voids 7 are filled with air or polyurethane foam, it is preferable to use plastic by blow molding. Further, the supporting leg 2 is replaced with a supporting leg 2' having threaded portions 3' on the upper and lower sides in which the upper and lower screw directions are reversed as shown in FIG.
By screwing these together, it is possible to create a pallet using both upper and lower flat plates as shown in FIG.

Further, the pallet of the present invention can be joined between the back surface of the deck board 1 and the support leg 2 via a reinforcing material 8 (FIGS. 9a and 9b). The reinforcing material may be anything that is lightweight and highly rigid; for example, it may be made of wood including plywood, hard urethane foam, hard polyvinyl chloride, etc. It can be installed on the entire back surface or around the supporting legs, or it can be installed on the entire back surface or around the supporting legs, or It can be installed in a strip like this. The installation of this reinforcing material further improves the rigidity of the deck board.

Examples of the synthetic resins used in the pallets of the present invention include polyolefin resins such as high density polyethylene, low density polyethylene, polypropylene, and ethylene-propylene copolymers; vinyl chloride resins such as polyvinyl chloride and polyvinylidene chloride;
Examples include styrene resins such as polystyrene, acrylonitrile-styrene copolymer, acrylonitrile-butadiene-styrene copolymer, polyamide resins, and polyester resins, but polyolefin resins, especially polyolefin resins, are preferred from the viewpoint of physical properties of pallets and economic efficiency. High density polyethylene is preferred. In addition,
These resins may contain antioxidants, ultraviolet absorbers, blowing agents, dyes, pigments, and organic or inorganic fillers, if necessary.

Effects of the Invention As described above, in the synthetic resin pallet of the present invention, even if the deck board is formed into a hollow shape, the supporting legs are attached separately to this, so that the reinforcing ribs on the back side are attached to the supporting legs. It will not be interrupted at this part. Moreover, since these ribs are arranged radially from the center of the deck board, uniform load-bearing strength is obtained no matter which direction the fork is inserted, and it greatly adds resistance to bending of the deck board when inserted in all directions. This increases bending rigidity and prevents deformation due to load. Further, since the support legs can be made detachable, the life of the pallet is extended because the support legs can be replaced if they are damaged by a fork or the like. Further, since the upper surface of the deck board can be made flat without forming ribs, in this case, dirt and the like will not accumulate there, making it sanitary. Furthermore, the deck board is formed by blow molding, which is economical because the mold is lighter and easier to manufacture than injection molding, and the molding pressure is lower.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention. Figure 1 is a perspective view of the pallet of the present invention, Figure 2 is a plan view of the back of the deck board, and the left half of Figure 3 is a front view of Figure 1 (A
or B direction), the right half is a cross-sectional view taken along the line X-X in Figure 2, Figure 4 is an enlarged cross-sectional view of the threaded joint of the support leg, Figure 5 is an enlarged cross-sectional view of the upper and lower screwed joints, and Figure 6 7 is a sectional view of the ribs on the back of the deck board, FIG. 8 is a plan view of the deck board with reinforcing material installed, and FIG. 9 a,
b is a cross-sectional view of the supporting leg mode in which a reinforcing member is installed. In addition, 1 and 1' are deck boards, 2 and 2' are supporting legs, 3 and 3' are threaded parts, 4 and 4' are ribs, 5 is a groove on the back of the deck board, and 6 and 6' are gaps in the ribs.
Reference numerals 7 and 7' indicate spaces between the supporting legs, and 8 indicates a reinforcing member.

Claims (1)

[Claims] 1. A deck board molded by the hollow molding method and having ribs on the back surface consisting of a plurality of sealed hollow parts that extend radially continuously from the center to the outer edge, molded separately, and connected to each independent support leg. A pallet made of synthetic resin.