JP2002255176A - Two-way insertion type pallet made of synthetic resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the rigidity and the strength of a two-way insertion type pallet made of a synthetic resin, to extend the durable years of the two-way insertion type pallet made of the synthetic resin. SOLUTION: For this two-way insertion type pallet made of the synthetic resin, longer edge connecting ribs 14 and 18 which divide at least the insides of beams 11 and 12 are constituted of thicker sections 14a1 and 18a1, and thinner sections 14a2 and 18a2. In this case, for the thicker sections 14a1 and 18a1, the thickness extends under an approximately uniform state from a deck board 10 by a specified length. The thinner sections 14a2 and 18a2 are located between the thicker sections, and at the same time, for the thinner sections 14a2 and 18a2, the thickness which is thinner than the thicker sections extends under an approximately uniform state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-way synthetic resin pallet on which articles are placed for transportation, storage and the like.

[0002]

2. Description of the Related Art Conventionally, a deck board 1 having a placement surface 1a on which a load is placed, a tubular side girder portion 2a formed along one opposite side of the deck board 1, and a A skid S 'including a tubular intermediate girder 3a formed substantially in parallel with the side girder 2a at an intermediate portion of the side girder 2a.
Is manufactured by injection molding or the like, and welding the ends of the side girders 2a and the ends of the intermediate girders 3a of the two skids S 'having such a configuration. A two-way synthetic resin pallet as shown in FIG. 5 is known. 2 manufactured in this way
The side spar 2 is formed by the side spar 2a to which the ends are welded, and the side spar 2 is formed,
An intermediate girder 3 is formed by an intermediate girder portion 3a whose ends are welded together, and two fork insertion holes 4 are formed between the side girder 2 and the intermediate girder 3.

[0003] In the side girder 2 and the middle girder 3, along the longitudinal direction of the side girder 2 and the intermediate girder 3 (longitudinal direction of the fork insertion hole 4), the inside of the side girder 2 and the middle girder. In order to divide the inside of the girder 3, there are formed partition ribs 2 b and 3 b each having a slender, substantially rectangular cross section perpendicular to the length direction.

[0004]

The above-mentioned conventional two-way synthetic resin pallet has a rigidity and strength along the longitudinal direction of the side beam 2 and the intermediate beam 3 (the longitudinal direction of the fork insertion hole 4). There is a problem that the service life of the two-way synthetic resin pallet is short because it is not sufficient.

In the conventional two-way synthetic resin pallet, the thickness d1 of the leading end of the partition ribs 2b and rib 3b is larger than the thickness d1 of the deck board 1 in the skid S 'state.
2 is thick, the difference in shrinkage in the cooling process after injection molding is large, and therefore, there is a problem that the deck board 1 is deformed in a mountain-like manner.

Further, in order to reduce the weight of the synthetic resin pallet, it is common practice to reduce the thickness of the rib. However, when the thickness of the rib is reduced, the thickness of the synthetic resin pallet is reduced. There is a problem that the strength and rigidity of the pallet decrease.

An object of the present invention is to solve the problems of the above-mentioned conventional two-way synthetic resin pallet.

[0008]

According to the present invention, in order to achieve the above-mentioned object, in a two-way synthetic resin pallet, firstly, at least a long side connecting rib for partitioning the inside of a spar is provided on a deck. A thick portion extending from the board with a predetermined length and a substantially constant thickness, and a thin portion located between the thick portions and having a thickness smaller than the above thickness and extending in a substantially constant state. Secondly, the long side connecting rib portion formed in the girder portion has a thick wall extending from the deck board with a predetermined length and a substantially constant thickness. And a thin part extending from the center of the thick part, having a thinner thickness than the thick part, and having a thin part extending in a substantially constant state. It is manufactured by welding.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a two-way synthetic resin pallet of the present invention will be described with reference to FIGS. 1 to 3, but is not limited to this embodiment unless it exceeds the gist of the present invention. is not.

S is a skid in an injection molded state. Like the conventional skid S 'described above, the skid S
Are a deck board 10 and an elongated tubular side girder 11 formed along one of the opposite sides of the deck board 10.
a and the side girder 1 in the middle of the opposing side girder 11a.
1a, which has a cylindrical intermediate girder portion 12a which is also elongated and formed substantially in parallel to 1a.

The side girder 11a is formed of a peripheral wall 13a and a peripheral wall 13 connecting the opposite short sides 13a1 of the peripheral wall 13a.
A long side connecting rib portion 14a having the same height as a, and a peripheral wall portion 13a connecting the opposite long side 13a2 of the peripheral wall portion 13a.
And has short side connecting rib portions 15a arranged at a predetermined interval. In the present embodiment, one long-side connecting rib portion 14a is shown, but a plurality of long-side connecting rib portions 1a are provided at predetermined intervals.
4a can also be formed. In addition, 16a is a reinforcing rib portion having a low height formed as necessary along the short side connecting rib portion 15a on the peripheral wall 13aa located between the short side connecting rib portions 15a and the back surface of the deck board 10. It is.

The intermediate girder portion 12a is formed of a peripheral wall portion 17a and a peripheral wall portion 17 connecting the opposite short sides 17a1 of the peripheral wall portion 17a.
a, and has the same height as the peripheral wall portion 17a connecting the long side connecting rib portions 18a arranged at predetermined intervals and the opposite long side 17a2 of the peripheral wall portion 17a. And a short side connecting rib portion 19a arranged at an interval. In this embodiment,
Although two long side connecting ribs 18a are shown, three or more long side connecting ribs 18a may be formed. 20a is a reinforcing rib having a low height formed as necessary along the short side connecting rib portion 19a on the peripheral wall portion 17a located between the short side connecting rib portions 19a and the back surface of the deck board 10. Department.

On the back surface of the deck board 10 located between the side girder 11a and the intermediate girder 12a, reinforcing ribs 2 running vertically and horizontally and having a lower height than the peripheral walls 13a and 17a are provided.
1 are formed, and the side girder 11a and the intermediate girder 12a
The fork insertion opening 22 is formed by the concave portion 22a formed between the fork insertion hole 22 and the recess 22a. In addition, on the peripheral wall of the deck board 10 of the present embodiment, an overhanging portion 10a slightly protruding from the peripheral wall 13a of the side girder 11a and the peripheral wall 17a of the intermediate girder 12a is formed.

The ends of the side girders 11a of the two skids S having the above-described construction and the intermediate girders 1
By welding the ends of 2a, a two-way synthetic resin pallet as shown in FIG. 3 is manufactured. The pallet made of two-way synthetic resin manufactured in this manner is provided with side girders 11a whose ends are welded to each other.
A side girder 11 is formed, and an intermediate girder 12 is formed by an intermediate girder portion 12a whose ends are welded to each other. A fork insertion hole 22 is formed. In addition, the peripheral wall 13 of the side girder 11 composed of the peripheral wall portion 13a is formed by welding the ends of the side girder portions 11a of the two skids S to each other. By welding the ends of the intermediate girder portions 12a to each other, the peripheral wall 17 of the intermediate girder 12 composed of the peripheral wall portion 17a is formed.

The ends of the long side connecting ribs 14a formed in the side girders 11a of the two skids S are also welded together, and the ends of the long side connecting ribs 14a are welded together.
Long side connecting ribs 14 that define the inside of the side girders 11 are formed,
Similarly, the ends of the short side connecting ribs 15a of the two skids S are also welded together, and the short side connecting ribs 15a are welded to each other, and the short side connecting ribs 15a define the inside of the side girder 11. The rib 15 will be formed. In addition, a long side connecting rib portion 18 formed in the intermediate girder portion 12a of the two skids S
a are also welded to each other, and the long side connecting rib portion 18a
Are welded to each other to form the long side connecting ribs 18 for partitioning the inside of the intermediate girder 12. Similarly, the ends of the short side connecting rib portions 19a of the two skids S are also welded to each other. By welding the ends of the side connecting rib portions 19a, the intermediate girder 1
The short side connecting ribs 19 that partition the inside of the second 2 are formed.

In this embodiment, in the skid S state, the long side connecting rib portion 1 formed in the side beam portion 11a is formed.
4a is a thick portion 14a extending from the deck board 10 with a predetermined length (height direction) and a thickness d3 substantially constant.
1 and extending from the central portion of the thick portion 14a1,
The thickness d4 is smaller than the thick portion 14a1, and the thin portion 14a2 extends in a state where the thickness d4 is substantially constant. Similarly, in the skid S state, the intermediate girder 1
The long side connecting rib portion 18a formed in the inside 2a has a thick portion 18a1 extending from the deck board 10 with a predetermined length (height direction) and a thickness d5 substantially constant, and a thick portion 18a1.
And a thin portion 18a2 having a thickness d6 smaller than the thick portion 18a1 and extending in a substantially constant thickness d6. Accordingly, the long side connecting ribs 14 and the long side connecting ribs 18 which partition the inside of the side girders 11 of the synthetic resin pallet manufactured by welding the two skids S are formed by the deck board 10. Side thick ribs 14a1 and 18a1 and thin wall parts 14a2 and 18a2 located between the thick wall parts 14a1 and 18a1 located on the deck board 10 side. The cross-sectional shape perpendicular to the longitudinal direction of 18 is formed substantially in the shape of a drum. By adopting such a configuration, the section modulus and the second moment of area of the conventional two-way synthetic resin pallet are larger than those of the section ribs 2b and rib 3b having a long and narrow rectangular cross section, and therefore, The weight of the synthetic resin pallet is the same,
In addition, when the sectional areas of the conventional partition ribs 2b and 3b and the long side connecting ribs 14 and 18 of the present embodiment are the same, the two-way synthetic resin pallet is replaced with the conventional two-way synthetic resin pallet. The rigidity and strength of the side girder 11 and the intermediate girder 12 along the longitudinal direction are increased, and the service life of the two-way synthetic resin pallet is increased. In other words, if it is sufficient to have the same rigidity and strength as the conventional two-way synthetic resin pallet, the weight of the two-way synthetic resin pallet can be reduced.

As described above, the thickness d4 of the thin portion 14a2 located at the tip of the long side connecting rib portion 14a formed in the side girder portion 11a of the skid S is the same as that of the long side connecting rib portion 14a. Is formed thinner than the thickness d3 of the thick portion 14a1 located at the root portion of the thin portion 14a1, and the thickness d of the thin portion 14a2 is formed.
4 can be configured to be substantially the same as the thickness of the deck board 10, so that the thickness d2 at the tip of the partition rib 2b and the rib 3b is thicker than the thickness d1 of the deck board 1 in the skid S 'state. As in the case of a conventional two-way synthetic resin pallet, it is possible to prevent mountain-like deformation of the deck board 10 due to cooling of the skid after injection molding.

In the above-described embodiment, in addition to the configuration in which the cross-sectional shape of the long-side connecting ribs 14 that partition the inside of the side girder 11 and the long-side connecting ribs 18 that partition the inside of the intermediate girder 12 are substantially drum-shaped. Of the peripheral walls 13 of the side girders 11 formed by welding the ends of the side girders 11a of the two skids S to each other, the long side peripheral wall 13 'located on the fork insertion port 22 side.
The long side connecting rib 1 that defines the cross-sectional shape of
Similarly to the cross-sectional shape of the long side connecting rib 18 which partitions the inside of the fourth and intermediate girders 12, by forming it in a substantially drum shape,
The rigidity and strength of the pallet made of a synthetic resin can be increased. In addition, the intermediate portion 1 of the two skids S
Of the peripheral wall 17 of the intermediate girder 12 formed by welding the ends of 2 a, the cross-sectional shape of the long side peripheral wall 17 ′ located on the fork insertion port 22 side is changed to the long side that partitions the inside of the side girder 11. Similar to the cross-sectional shape of the connecting ribs 14 and the long side connecting ribs 18 that define the inside of the intermediate girder 12, the rigidity and strength of the two-way synthetic resin pallet can be further increased by forming the connecting ribs into a substantially drum shape. . Further, of the peripheral walls 13 of the side girders 11 formed by welding the ends of the side girders 11a of the two skids S to each other, the long side peripheral wall located on the opposite side to the fork insertion opening 22. 13 ”cross section
Similarly to the cross-sectional shape of the long side connecting ribs 14 that partition the inside 1 and the long side connecting ribs 18 that partition the inside of the intermediate girder 12, the rigidity and strength of the two-way synthetic resin pallet Can be further increased.

As described above, at least the digits 11, 1
Long-side connecting ribs 14 and 18 that define the inside of the inner wall 8 have thick portions 14a1 and 18a1 that extend from the deck board 10 in a predetermined length (height direction) and have substantially constant thicknesses d3 and d5.
The thin portions 14a2, 18a2 which are located between the thick portions 14a1, 18a1 and have thicknesses d4, d6 which are thinner than the thicknesses d3, d5 and extend in a substantially constant state are formed. It is shaped like a drum, so
The rigidity and strength of the plastic insert pallet increase,
Accordingly, the useful life of the two-way synthetic resin pallet is extended.

[0020]

Since the present invention has the above-described structure, the following effects can be obtained.

At least a long side connecting rib for partitioning the inside of the spar is located between a thick portion extending from the deck board with a predetermined length and a substantially constant thickness, and between the thick portions.
The rigidity and strength of the two-way synthetic resin pallet can be increased because the thin portion is formed from a thin portion having a thickness smaller than the above thickness and extending in a substantially constant state. The service life of the resin pallet can be extended.

Further, the thickness of the tip of the long side connecting rib formed in the girder of the skid is made thinner than the thickness of the root of the long side connecting rib, so that the cooling of the skid after injection molding is performed. This can prevent the deck board from being deformed in a mountain-like manner.

[Brief description of the drawings]

FIG. 1 is a perspective view of a skid constituting a two-way synthetic resin pallet of the present invention.

FIG. 2 is a partially enlarged perspective view of the skid shown in FIG.

FIG. 3 is a partial vertical sectional view orthogonal to a fork insertion hole of the two-way synthetic resin pallet of the present invention.

FIG. 4 is a partial vertical sectional view perpendicular to a fork insertion hole of a two-way synthetic resin pallet according to another embodiment of the present invention.

FIG. 5 is a perspective view of a conventional two-way synthetic resin pallet.

FIG. 6 is a vertical sectional view taken along the line II of FIG. 5;

[Explanation of symbols]

 S ············································· Semi-span ........... Long side connecting rib 14a, 18a

Claims (2)

[Claims] At least a long side connecting rib for partitioning the inside of a girder is located between a thick portion extending from a deck board with a predetermined length and a substantially constant thickness, and between the thick portions. With
A two-way synthetic resin pallet, wherein the pallet is formed from a thin portion having a thickness smaller than the above-mentioned thickness and extending in a substantially constant state. 2. A long-side connecting rib portion formed in a girder portion includes a thick portion extending from the deck board with a predetermined length and a substantially constant thickness, and a central portion of the thick portion. And a thinner portion extending in a state where the thickness is thinner than the thick portion and having a substantially constant thickness. Pallets made of synthetic resin.