JP2001341742A - Pallet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pallet which can improve strength while suppressing an increase in weight. SOLUTION: The pallet 10 is formed by vertically placing deck boards 11 at a predetermined distance and coupling both boards 11 with each other via an end beam 12, an intermediate beam 13 and a center beam 14. A plurality of first reinforcing ribs 30 are provided between the intermediate beam 13 and the center beam 14, and between the end beam 12 and the intermediate beam 13 which are adjacent to a longitudinal direction of the board 11 so that external surfaces of peripheral walls of the respective beams 12, 13 and 14 are connected. The first reinforcing ribs 30 include dense intervals and coarse intervals, wherein dense portions hold the pallet 10 with high strength and coarse portions suppress an increase in weight of the pallet 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pallet used when carrying or moving a plurality of loads by a forklift.

[0002]

2. Description of the Related Art Conventionally, when carrying or moving a plurality of loads to a warehouse or the like by a forklift, a rectangular pallet made of a synthetic resin is used. This pallet is composed of a pair of upper and lower plates in the form of a square plate, and a plurality of tubular girder portions provided between the two plate portions and connecting them. Fork insertion hole.

[0003] Between adjacent girders, reinforcing ribs protrude from the inner surfaces of both plate portions so as to form a lattice. These reinforcing ribs are arranged in parallel at equal intervals in the vertical and horizontal directions of the plate portion, and receive a force such as a twist applied to the pallet to prevent deformation.
Further, a through hole is provided in the plate portion inside the portion surrounded by the reinforcing ribs, thereby reducing the weight of the pallet.

[0004]

However, in order to improve the strength of the conventional pallet, the interval between the reinforcing ribs is reduced so that more reinforcing ribs are provided on the inner surface of the plate portion. However, in this case, the weight of the pallet increases, making it difficult to move the pallet. Therefore, there is a problem that it is difficult to achieve both improvement in strength and reduction in weight.

The present invention has been made by paying attention to such problems existing in the prior art. It is an object of the present invention to provide a pallet capable of improving strength while suppressing an increase in weight.

[0006]

According to a first aspect of the present invention, there is provided a pallet according to the first aspect, wherein a plurality of plate members arranged vertically are connected by a plurality of tubular girders, A pallet having a fork insertion hole into which a fork of a forklift is inserted between each of the girders, wherein the girders are located at least on the inner surface of the plate-like member at positions corresponding to the ends of the peripheral walls of adjacent girders. A plurality of reinforcing ribs are provided to connect between the reinforcing ribs, and a dense portion and a sparse portion are provided between the reinforcing ribs.

According to a second aspect of the present invention, there is provided a pallet in which plate members arranged vertically are connected by a plurality of tubular girders, and a fork of a forklift is inserted between the girders. A pallet provided with an insertion hole,
On the inner surface of the plate-like member, a girder reinforcement rib is provided inside the girder, and at least a plurality of reinforcement ribs connecting the girders are provided at positions corresponding to between the girder reinforcement ribs inside the adjacent girder. A dense portion and a sparse portion are provided in the interval between the reinforcing ribs.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIGS. 1 and 2, the pallet 10 includes a pair of upper and lower decks 10a divided into two parts at the center in the height direction. These decks 10a are molded in the same shape. The mounting plate 11 as a plate-like member constituting the deck 10a is formed in a substantially rectangular shape by a synthetic resin. At the four corners of the mounting plate 11, end beams 12 each having a substantially rectangular tube shape are formed. On both sides of the long side and the short side of the mounting plate 11, an intermediate girder 13 having a substantially long rectangular cylindrical shape is formed at the center between the end girder 12. At the center of the mounting plate 11, a substantially square tubular center girder 14 is formed.

The decks 11 are arranged vertically with one deck 10a facing upward and the other deck 10a facing downward with the mounting plates 11 separated from each other by a predetermined distance. And the two plates 11 are connected to each other by heat welding.
0 is formed. In this state, each end girder 12 and intermediate girder 1
Fork insertion holes 15 are provided between the three pallets 3, respectively, and a space in the pallet 10 which is deeper from the fork insertion holes 15 is a fork insertion portion 15a. A fork of a forklift (not shown) is inserted into the fork insertion portion 15a from the fork insertion hole 15.

As shown in FIGS. 1 and 4, an end girder 12, an intermediate girder 13 and a center girder 14 are provided on the inner surface of the mounting plate 11.
Square ribs 21 are provided on the inner surfaces of the four corners,
13 and 14 are formed so as to extend obliquely inward.

A pair of first main ribs 22 provided at the center of the inside of the center girder 14 are formed in a direction orthogonal to each other, that is, in a cross shape when viewed from a plane, and are arranged so as to connect the inner surfaces of the opposed side walls of the center girder 14. Have been. Mounting plate 11
Plurality of first sub-ribs 23 extending in the longitudinal direction and the width direction
Are provided at substantially equal intervals in parallel with the first main ribs 22 so as to connect the inner surfaces of the opposed side walls of the center girder 14.

A second main rib 24 provided inside the intermediate girder 13 is arranged at the center in the longitudinal direction of the intermediate girder 13 and extends in the width direction of the intermediate girder 13 so as to connect the inner surfaces of the opposed side walls. The plurality of second sub-ribs 25 extending in parallel with the second main rib 24 are provided at substantially equal intervals in parallel with the second main rib 24 so as to connect the inner surfaces of the side walls of the intermediate girder 13 facing each other. The second main rib 24 and a plurality of second ribs
Third sub-rib 26 extending in a direction orthogonal to sub-rib 25
Are intermediate girders 13 located on both long sides of the mounting plate 11.
In this example, one of the intermediate girders 13 is arranged at the center in the width direction,
In the intermediate girder 13 located on the both side edges on the short side of 1, the intermediate girder 1
3 are arranged side by side in the middle in the width direction.

The third main rib 27 provided inside the end spar 12 is formed in a horizontal L-shape when viewed from the top, and its bent portion is located at a corner of the mounting plate 11. 21 and are integrated. The fourth sub-rib 28 extending in the width direction of the end spar 12 is disposed closer to the inside of the mounting plate 11 than the longitudinal center of the end spar 12.

The girder portion is reinforced by the above-mentioned square rib 21, the first, second and third main ribs 22, 24 and 27, and the first, second, third and fourth sub-ribs 23, 25, 26 and 28. A rib 20 is configured. And the girder reinforcement rib 2
The strength of each digit 12, 13, 14 can be maintained by 0.

As shown in FIGS. 3A and 3B, in the girder reinforcing rib 20, the square rib 21 and each main rib 2 are provided.
2, 24, 27 have heights of respective digits 12, 13,
It is formed to have the same height as 14. Thus, when the pair of decks 10a are thermally welded, the square ribs 21 and the main ribs 22, 24, and 27 are vertically integrated to form a single plate, and each of the beams 12, 13, and 14 has high strength. To hold. In addition, each sub rib 23, 25, 26,
28 is cut out so that both ends are at the same height as the respective girders 12, 13 and 14, and the middle part is lower than both ends so as to maintain the strength of the girders 12, 13 and 14 while maintaining the strength of the girders 10. The weight has been reduced.

As shown in FIG. 4, an intermediate girder 1 is provided between an intermediate girder 13 and a center girder 14 adjacent to the mounting plate 11 in the longitudinal direction.
A connecting rib 31 protrudes from the inner surface of the mounting plate 11 so as to connect the ends of the side walls 13a and 14a extending in the longitudinal direction of the mounting plate 11 among the four side walls forming the 3 and the center girder 14. Have been. A second sub-rib 25 and a first sub-rib 23 disposed inside each of the beams 13, 14;
The connecting ribs 31 of the second main rib 24 and the first main rib 22 are connected so as to connect the ends thereof.
Is provided. In addition to the connecting ribs 31, a plurality of auxiliary ribs 32 project from the intermediate girder 13 and the center girder 14 adjacent to the mounting plate 11 in the longitudinal direction so as to extend in parallel with the connecting ribs 31. 13 and center girder 14
The outer surface of the surrounding wall is connected.

The connecting rib 31 and the auxiliary rib 32 constitute a first reinforcing rib 30. These first reinforcing ribs 30 are provided with a dense portion and a sparse portion at the interval. In particular, the interval between the connecting rib 31 and the auxiliary rib 32 extending in parallel in the immediate vicinity of the connecting rib 31 is close, and the pallet 1
0 is maintained at high strength. Then, the first reinforcing rib 30
By providing sparsely spaced portions, the increase in the weight of the pallet 10 is suppressed.

The interval between the sparse portions is 2 to 5 times the interval between the dense portions. In the first reinforcing rib 30, the width of the connecting rib 31 and the width of the auxiliary rib 32 are substantially the same. Further, the widths of the connecting rib 31 and the auxiliary rib 32 are the first main rib 22, the first sub-rib 23,
The length is almost the same as the width of the second main rib 24 and the second sub rib 25. In addition, the closely-spaced parts are 3 to 5
It is constituted by the auxiliary ribs 32 of the book.

As shown in FIG. 1, between the end girders 12 and the intermediate girders 13 which are adjacent to each other in the longitudinal direction of the deck 10a, there are also provided the same number of closely spaced portions and sparsely spaced portions as described above. 1
A reinforcing rib 30 is provided. The connecting ribs 31 constituting the first reinforcing ribs 30 here are provided at the end girders 12 and the intermediate girders 13 with the ends of the side walls 12 a and 13 a extending in the longitudinal direction of the mounting plate 11, the third main rib 27 and Third
The sub rib 26 is connected. A sparsely spaced portion is provided at substantially the center in the width direction of the end spar 12 and the intermediate spar 13, and a densely spaced portion is provided at other locations.

Since the first reinforcing rib 30 is located in the fork insertion portion 15a, the height thereof is set to each of the spar 12,
It is formed to be lower than 13 and 14. A second reinforcing rib 40 formed in a grid pattern by a plurality of vertical ribs 41 and horizontal ribs 42 is provided between the beams 12, 13 and 14 adjacent to the mounting plate 11 in the width direction. These second
Among the reinforcing ribs 40, several vertical ribs 41 are provided so as to connect the girder reinforcing ribs 20 extending in the width direction of the mounting plate 11, thereby holding the pallet 10 with high strength.
A fork rib 51 in the form of a lattice is provided in an inner portion surrounded by the first reinforcing rib 30 and the second reinforcing rib 40, and holds the mounting plate 11 forming the peripheral wall of the fork insertion portion 15a with high strength. are doing.

The above-mentioned first reinforcing ribs 30 and second reinforcing ribs 4
The plate portion reinforcing rib 50 is constituted by the 0 and the fork rib 51. In this plate portion reinforcing rib 50, the mounting plate 1
The ribs 30, 40, and 51 extending in the same direction in the longitudinal direction and the width direction are substantially integrally formed by being disposed on the same line, and hold the mounting plate 11 with higher strength. are doing. The weight of the pallet 10 is reduced by penetrating through holes 60 in the mounting plate 11 in the inner portion surrounded by the plate portion reinforcing ribs 50.

The operation of the pallet 10 will be described below. When the pallet 10 as shown in FIG. 2 is used, first, a load is placed on the placing plate 11, and in this state, the fork of the forklift is inserted into the fork located on the long side of the pallet 10. The fork is inserted into the fork insertion portion 15a from the hole 15, and is lifted upward. Then, the load is transported together with the pallet 10 to the destination.

In this state, the long side of the mounting plate 11 is bent downward due to the weight of the load, and a plurality of sets of the first reinforcing ribs 30 to which the upper surface of the fork is abutted follow this. At this time, several connecting ribs 31 extending in the longitudinal direction
Are the side walls 12a, 13a, 14a of the respective girders 12, 13, 14.
Since it is arranged on the same line as and is integrally formed,
The pallet 1 has high resistance to the bending of the mounting plate 11.
0 is kept high. In addition, the connecting ribs 31 and the auxiliary ribs 3 arranged in parallel at close intervals among the first reinforcing ribs 30 are also provided.
By dispersing and receiving the force applied via the mounting plate 11, the force is prevented from being concentrated only on a specific portion of the first reinforcing rib 30.

Further, several connecting ribs 31 are connected to each girder 12,
They are arranged on the same line as the direction in which the girder reinforcing ribs 20 provided inside 13 and 14 extend, and are integrally formed. For this reason, the first reinforcing rib 30 and the girder reinforcing rib 20
The pallet 10 is held with high strength by receiving a force on the entire rib extending over the entire longitudinal direction of the mounting plate 11 with which the pallet 10 is combined, and the bending is suppressed. In addition, of the girder reinforcing ribs 20, each of the main ribs 22, 24, and 27 is a respective girder 1
The pallet 10 is formed so as to extend over the entire height of the pallet 2, 13 and 14, and is thermally welded up and down to form a single plate.

The pallet 10 having been transported to the destination and having the load unloaded is stored in a dedicated storage place by an operator or moved to the next destination. At this time,
By providing the through holes 60 in the mounting plate 11 in the inner part surrounded by the connecting ribs 31 and the auxiliary ribs 32, the weight of the pallet 10 is reduced, and the pallet 10 can be easily moved by an operator.

It is also possible to insert and use a fork from a fork insertion hole 15 provided on the short side of the pallet 10. In this case, the deformation of the pallet 10 due to the weight of the load is suppressed by the second reinforcing rib 40.
In addition, among the second reinforcing ribs 40, several vertical ribs 41 are provided so as to connect the girder reinforcing ribs 20 extending in the width direction of the mounting plate 11, and are integrally configured, so that 2 The deformation of the reinforcing rib 40 itself is suppressed, and the pallet 10 is held with high strength.

Since the pallet 10 has the same shape as the front and back sides, the method of use is the same as described above even when the pallet 10 is used upside down, and it is possible to place and use the load on both sides.

The effects exerted by the above embodiment will be described below. A first reinforcing rib 30 having a connecting rib 31 formed integrally with the end wall of each of the girders 12, 13, and 14 and a plurality of auxiliary ribs 32 arranged in parallel with the connecting rib 31 at a close interval; Since the bending of the mounting plate 11 is effectively suppressed and the pallet 10 is held at a high strength, the strength of the pallet 10 can be improved. In addition, since the first reinforcing ribs 30 have sparsely spaced portions, the first reinforcing ribs 30
The increase in weight due to the increase of the number is suppressed.

A connecting rib 31 formed integrally with the girder reinforcing ribs 20 so as to connect the girder reinforcing ribs 20 formed inside the adjacent girders 12, 13, 14;
And the first reinforcing ribs 30 having a plurality of auxiliary ribs 32 arranged in parallel with the connecting ribs 31 at close intervals, effectively suppressing the bending of the mounting plate 11 and holding the pallet 10 with high strength. Therefore, the strength of the pallet 10 can be improved.

The present embodiment can be embodied with the following modifications. As shown in FIG. 5, in the square pallet 10, the peripheral wall of each of the girders 13 and 14 and the girder reinforcing ribs 2 between the central girder 14 and the middle girder 13 adjacent in the vertical and horizontal directions.
The first reinforcing ribs 30 including the connecting ribs 31 connecting the first and second connecting ribs 31 and the auxiliary ribs 32 arranged in parallel with the connecting ribs 31 may be provided so as to have a dense portion and a sparse portion at the interval. With this configuration, it is possible to improve the strength of the pallet 10 while suppressing an increase in weight.

The pallet 10 may be formed in a different shape from the front and back by using a bottom plate instead of the mounting plate 11 for the lower plate-like member, so that only one side is used. In the embodiment, a pair of fork insertion holes 15 is provided on each of the long side and the short side of the pallet 10, but it may be provided on only one of them.

Further, a technical idea which can be grasped from the above embodiment will be described below. The pallet according to claim 1, wherein the spar has a substantially rectangular cylindrical shape, and one of the ribs constituting the reinforcing rib is arranged on the same line as the extending direction of the peripheral wall forming the spar. In the case of such a configuration, the peripheral wall of the girder and the reinforcing rib are integrated,
The strength of the pallet can be further improved.

The pallet according to claim 2, wherein one of the ribs constituting the reinforcing rib is disposed on the same line as the direction in which the spar reinforcing rib extends. With this configuration, the girder reinforcing ribs and the reinforcing ribs are integrated, and the strength of the pallet can be further improved.

The spar has a substantially quadrangular cylindrical shape, and a reinforcing rib is provided on an extension of a side wall of the spar, and a space between the reinforcing rib and a reinforcing rib disposed immediately adjacent to the reinforcing rib is set as a dense portion. The pallet according to claim 1. In the case of such a configuration, the side wall of the spar and the reinforcing rib are integrated, and the strength of the pallet can be further improved.

The pallet according to claim 2, wherein a reinforcing rib is provided on an extension line of the girder reinforcing rib, and a space between the reinforcing rib and the reinforcing rib disposed immediately adjacent to the reinforcing rib is a dense portion. With this configuration, the girder reinforcing ribs and the reinforcing ribs are integrated, and the strength of the pallet can be further improved.

The pallet according to claim 2, wherein a plurality of the girder reinforcing ribs are provided, and at least one of the plurality of girder reinforcing ribs is formed to have the same height as the girder. With this configuration, it is possible to suppress deformation of the girder reinforcing ribs and further improve the strength of the pallet.

The pallet according to claim 1 or 2, wherein a through-hole is provided in a plate-like member at an inner portion surrounded by each rib constituting the reinforcing rib. With this configuration,
The pallet can be further reduced in weight.

[0038]

As described above in detail, according to the present invention, the following effects can be obtained. According to the pallet of the first or second aspect of the invention, it is possible to improve the strength of the pallet while suppressing an increase in weight.

[Brief description of the drawings]

FIG. 1 is a plan view showing a state where a deck of a pallet is viewed from an inner surface side.

FIG. 2 is a perspective view showing a pallet according to the embodiment.

FIG. 3A is a sectional view showing an intermediate girder and a center girder,
(B) is sectional drawing which shows an intermediate girder and an end girder.

FIG. 4 is a partially enlarged plan view showing an intermediate girder and a center girder.

FIG. 5 is a plan view showing a state in which another type of deck is viewed from the inner surface side.

[Explanation of symbols]

10 pallet, 11 mounting plate as plate member, 12
... End girder forming a girder, 13... Middle girder forming a girder, 1
4 ... Center girder forming a girder, 15 ... Fork insertion hole, 20
... Girder part reinforcement ribs, 31 ... Connection ribs constituting reinforcement ribs,
32 ... Auxiliary ribs constituting reinforcing ribs.

Claims (2)

[Claims] 1. A pallet in which plate members arranged vertically are connected by a plurality of cylindrical girders, and a fork insertion hole into which a fork of a forklift is inserted is provided between the girders. On the inner surface of the plate-like member, a plurality of reinforcing ribs are provided to connect between the girders at least at positions corresponding to the end portions of the peripheral wall of the adjacent girders, and a part densely spaced at intervals between these reinforcing ribs and Pallet with parts. 2. A pallet in which plate members arranged vertically are connected by a plurality of cylindrical girders, and fork insertion holes into which forks of a forklift are inserted are provided between the girders. On the inner surface of the plate-like member, a girder reinforcing rib is provided inside the girder, and a plurality of reinforcing ribs connecting the girders are provided at least at positions corresponding to the positions between the girder reinforcing ribs inside the adjacent girder. In addition, a pallet provided with a dense part and a sparse part in the space between these reinforcing ribs.