JPS60240644A - Pallet made of synthetic resin - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a synthetic resin pallet.

More specifically, the present invention relates to a forklift pallet used for transporting, moving, and storing articles.

[Prior art]

Due to the inherent properties of synthetic resin, synthetic resin pallets have many advantages over wood and metal pallets in terms of hygiene, formability, etc., but they do have the disadvantage of being inferior in impact strength and bending strength compared to those commonly used. ing.

In particular, pallets are transported and transferred by inserting the fork of a forklift into the fork insertion hole of the pallet, so accidents such as the fork of a forklift coming into contact with the periphery of the pallet and destroying the pallet. is likely to occur.

For this reason, for example, as disclosed in Japanese Patent Publication No. Sho, F3-27336, it has been considered to provide lips closer to the periphery of the pallet than other parts to improve impact resistance against fore contact. It was done.

[Purpose of the invention]

The pallet of the present invention is manufactured by the above-mentioned Japanese Patent Publication No. 33-1987. This is an improvement on the pallet disclosed in No. 27336, and a pallet structure that takes advantage of the physical properties of a synthetic resin and improves impact resistance against fork contact is realized.

In other words, considering the physical properties of synthetic resins, synthetic resins have the advantage of being superior in elasticity, although they are inferior in absolute strength in terms of impact resistance and the like compared to wood and metal.The present invention makes full use of this excellent elasticity. to absorb the shock when the fork hits,
This improves impact resistance.

[Structure of the invention]

The gist of the present invention is that at least seven deck boards are arranged on each of the upper and lower deck boards, on both side edges and in the middle part of the upper deck board; FN with the space surrounded by the bottom deck board as a fork insertion hole.
M# resin pallet made of synthetic resin characterized by having a rib inclined with respect to the fork insertion direction near the edge of at least one deck board and facing the fork insertion hole. It resides in the palette.

An example of the pallet of the present invention will be explained in more detail below using the drawings.

FIG. 1 is a partial cross-sectional view of an example of the pallet of the present invention, FIG. 1 is a perspective view of the pallet shown in FIG. 1, FIG.
No.! The figure is a partial cross-sectional view showing another example of the edge structure.

In the figure, / is a pallet, 2 is a deck board, 3 is a girder, and g is an internal rib. All thermoplastic resins are used as synthetic resins for manufacturing the pallet of the present invention.

Examples include polyethylene, polypropylene, polyolefin resins such as ethylene-propylene copolymers, polystyrene, acrylonitrile-styrene copolymers, acrylonitrile-styrene-butadiene terpolymers, polyvinyl chloride, and the like. These synthetic resins may be used in the production of pallets as they are, but it is preferable to knead them with a known blowing agent such as a volatile blowing agent or a pyrolytic blowing agent. . A pallet manufactured from this composition is a foam with a low magnification, and the surface layer is a non-foamed layer, so it is most preferable in terms of both weight and strength of the pallet. In addition, upper g+-: Additives such as fillers, pigments, and plasticizers that are commonly used are added to the synthetic resin as necessary. Pallet molding members each having a shape are manufactured separately.The molding members are integrally formed with a deck board recognition member and a finger member of the molding member, and the finger members are formed at both end edges and the middle of the deck board λ. At least one of the molding members is provided with a large number of ribs, which are lower in height than the finger members of the molding member, integrally with the deck board. The rib'&
jU% It is composed of a peripheral rib j provided inside a pallet extending in a direction parallel to the fork insertion direction and in a direction inclined to the oak insertion direction.

The pallet of the present invention is manufactured by welding the pallet molding members thus obtained to each other using the finger members of the molding members. Therefore, when welding the molding members together, it is necessary that the welding surfaces of the finger members of the corresponding molding parts have the same shape. The most common method for +C welding both molding members is to bring the welding surfaces of the finger members of the molding members into contact with the surface of a heating plate, thereby melting the welding surfaces, and then removing the heating plate and melting. After the welded surfaces of the members are pressed together, they are cooled.

As the heating plate, for example, a metal plate coated with Teflon is used, and the temperature is maintained at a temperature higher than the melting point of the material for the molding member.

The present invention is characterized by the rib j provided near the edge of the deck board.

That is, as shown in FIGS. 1, 3, and 9, in the present invention, the edge tab is provided at an angle with respect to the fork insertion direction (but parallel to the deck board surface). There is. By providing the edge rib j in this way, when the fork comes into contact with the deck board λ when inserting the fork, the edge rib! deforms elastically to some extent, absorbs shock, and prevents the deck board from being destroyed.

If the edge ribs are provided parallel to the fork insertion direction, the rigid strength will certainly increase, but the elastic absorption of impact as in the present invention cannot be expected. fork! It is also effective to not make the internal ribs extending parallel to the insertion direction continuous from edge to edge, but to form a notch 6 in the vicinity of the center, which can effectively absorb elastic shock. done effectively.

[Effects of the present invention]

Edge ribs provided at the edge of the deck board of the pallet and inclined with respect to the fork insertion direction elastically absorb the impact applied to the deck board, thereby preventing the pallet from being destroyed.

[Brief explanation of the drawing]

Fig. 1 is a partial cross-sectional view of an example of the pallet of the present invention, Fig. 2 is a perspective view of the pallet shown in Fig. 1, Fig. 3, Fig. 9,
No.! The figure is a partial cross-sectional view showing another example of the edge structure. In the figure, / indicates a pallet, 2 indicates a deck board, 3 indicates a finger, G indicates an internal rib, j indicates an edge rib, O indicates a cutout, and 2 indicates a fork insertion hole. Applicant Mitsubishi Chemical Industries, Ltd. ↓ - Representative Patent Attorney Hase Yo - □' ・Shi (and 7 others)
' 11 diagram bud 20

Claims (1)

[Claims] (1) Consisting of upper and lower deck boards and girders that connect the upper and lower deck boards, with at least 7 girders arranged on each side edge and middle part of the upper and lower deck boards, adjacent girders and the upper surface , a synthetic resin pallet with fork insertion holes in the space surrounded by the lower deck board, with at least 10,000 holes located near the edge of the deck board and facing the fork insertion holes, relative to the fork insertion direction. A synthetic resin pallet characterized by having an inclined lip.