JP2003291970A - Pallet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pallet for reducing the weight, enhancing the strength of the outer wall of an end girder exposed outside, and effectively preventing breakage by a fork butted thereto. <P>SOLUTION: The pallet is formed in a substantially square plate shape by welding an upper deck member 13 to a lower deck member 14, and a fork insertion hole 12 is formed between a pair of end girders 21 extending along both side edges and a middle girder 22 extending parallel to the side edges. A Y-shaped rib 41 is protruded from the outer wall 33a of the end girder 21 facing the fork insertion hole 12. A base plate 41a of the Y-shaped rib 41 extends in the direction orthogonal to the outer wall 33a of the end girder 21, and the tip of a branched plate 41b of the Y-shaped rib 41 is joined with reinforcement ribs (a short rib 35 and a partition 36) in an inclined manner at a predetermined angle. Each reinforcement rib extends parallel to the base plate 41a of the Y-shaped rib 41, and is joined with the outer wall 33a and the inner wall 33b of the end girder 21. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pallet made of synthetic resin, which has a fork insertion hole for inserting a fork of a forklift and is used for carrying a load such as a roof tile. More specifically, the present invention relates to a pallet configured to increase the strength of the outer portion of the end girder exposed to the outside, assuming that the tip of the fork is abutted.

[0002]

2. Description of the Related Art Conventionally, as a pallet of this type,
A synthetic resin pallet disclosed in JP-A-8-133285 is known. This pallet has fork insertion ports on two side surfaces, and is configured so that the forks can be inserted from two directions. Further, side plate portions of end girders located at both ends of a plurality of girders arranged along the fork insertion direction are formed on two side faces orthogonal to the two side faces on which the fork insertion port is formed. Has been done. At least a part of these side plate portions is provided with a plurality of reinforcing ribs inward from the side plate portion in a direction intersecting with the side plate portion. These reinforcing ribs are provided over the entire height of the end spar and over 1/10 or more of the width of the end spar.

Further, the tips of the reinforcing ribs are joined to connecting ribs extending in a direction orthogonal to the reinforcing ribs. In this synthetic resin pallet, the side plate portion is reinforced by the reinforcing ribs, so that the tip of the fork is brought into contact with the outer surface of the side plate portion so that the pallet can be smoothly rotated or moved. And the operability has been improved. As a modified example of the synthetic resin pallet, in addition to the reinforcing ribs connected to the side plate portion at a right angle, a pair of reinforcing ribs connected to the side plate portion at an angle of approximately 45 ° are simultaneously provided. Is also disclosed.

[0004]

However, in the above-mentioned conventional synthetic resin pallet, the reinforcing rib extends only from the side plate portion to the central portion of the end girder. It was configured to be received mainly by the inner side surfaces of the upper and lower deck boards provided at the upper and lower ends of the end girder. Furthermore, the connecting rib joined to the tip of the reinforcing rib extends in the direction orthogonal to the reinforcing rib, and is not configured to be oriented in the direction in which the impact is transmitted. Therefore, the impact is only locally and closedly transmitted to the lower surface of the upper deck board and the upper surface of the lower deck board, and it is almost expected from the structure that they are distributed to other reinforcing structures. could not. Therefore, when a strong impact is locally applied to the side plate portion from the tip of the fork, there is a high possibility that the impact point and the deck boards located in the vicinity thereof are locally deformed or damaged. .

Further, in the conventional synthetic resin pallet as a modified example, the reinforcing ribs extending obliquely hardly coincide with the impact direction applied to the impact point. If they match, the tip of the fork tends to slip on the surface of the side plate portion. Therefore, most of the impact is transmitted to the reinforcing ribs extending in the orthogonal direction to the side plate portion, and as described above, it is hardly expected that the impact is transmitted and received while being dispersed to the other reinforcing structure. .

The present invention has been made by paying attention to the problems existing in the prior art. The aim is to provide a pallet that is lighter in weight, more strengthens the outer wall of the girder exposed to the outside, and can effectively prevent breakage due to fork abutment. To do.

[0007]

In order to achieve the above object, the invention of a pallet as set forth in claim 1 is a substantially quadrangular plate shape by joining an upper deck member and a lower deck member made of synthetic resin. A pallet formed to form a fork insertion hole between a pair of end girders extending along both side edges and a middle girder extending parallel to the side edges,
A Y-shaped rib formed in a planar Y-shape is provided to project from an outer wall of the end girder opposite to the fork insertion hole, and a base end portion of the Y-shaped rib extends in a direction orthogonal to the outer wall of the end girder. The extension is provided, and the tip of the Y-shaped rib extends in parallel with the base end of the Y-shaped rib and is joined to a reinforcing rib joined to an outer wall or an inner wall of the end girder. It is a thing.

According to a second aspect of the present invention, there is provided a pallet invention comprising a synthetic resin upper deck member formed in a substantially rectangular plate shape, and a pair of end girders extending along both side edges and parallel to the side edges. In a pallet configured to have a fork insertion hole formed between it and a middle girder that extends in the direction of Y, a Y formed in a plane Y shape on the outer wall of the end girder facing the fork insertion hole.
A Y-shaped rib is projectingly provided, and a base end portion of the Y-shaped rib extends in a direction orthogonal to an outer wall of the end girder, and a tip end of the Y-shaped rib serves as a base end portion of the Y-shaped rib. The reinforcing ribs extend in parallel and are joined to the outer wall or the inner wall of the end girder.

The pallet invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the entire Y-shaped rib is configured to connect between upper and lower end portions of the pallet. To do.

The pallet invention according to claim 4 is the pallet invention according to claim 3, wherein the reinforcing rib is joined to an outer wall of the end girder and the reinforcing rib is connected between upper and lower end portions of the pallet. Thus, the reinforcing partition, the outer wall of the end girder and the Y-shaped rib are provided to stand up the reinforcing partition pillar on the outer side of the end girder.

The pallet invention according to claim 5 is characterized in that, in the invention according to any one of claims 1 to 4, the tip end portion of the Y-shaped rib is formed thin. is there.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. As shown in FIG. 2, the pallet 11 of the embodiment is formed of a synthetic resin in a substantially rectangular plate shape (a rectangular parallelepiped shape, a square shape in a plane), and has a two-sided single-sided configuration. That is, this pallet 1
1 has a total of 2 fork insertion holes 12 (one pair) for inserting forks of a forklift and a handlift.
It is provided. This pallet 11 is obtained by separately injection-molding an upper deck member 13 and a lower deck member 14,
The lower end surface of the upper deck member 13 and the upper end surface of the lower deck member 14 are welded to be integrated. The upper end surface of the pallet 11 is a top deck 1 extending along a horizontal plane.
5, a forklift or a handlift fork is inserted into a pair of left and right fork insertion holes 12 opened on one side of the upper deck 15 with an unillustrated object placed thereon. It is configured to be transported.

As shown in FIGS. 1 to 5, the pallet 11
A pair of left and right end girders 21 formed in the shape of a long quadrangular prism (substantially a long quadrangular cylinder) are erected on both sides of the pallet 11 along both side edges of the pallet 11. At a central position between the both-end girders 21, that is, at the center of the pallet 11, a middle girder 22 formed in a long quadrangular prism shape (substantially a long quadrangular cylinder shape) is provided.
It is erected so as to extend parallel to. The pair of left and right end girders 21 and the middle girder 22 support the upper deck 15 at a predetermined height while opening the fork insertion holes 12 in the pallet 11.

Between the end girder 21 and the middle girder 22, both girders 2
A long rectangular plate-shaped upper bar 23 extending along a horizontal plane is provided so as to connect the upper ends of the first and the second parts 22, and constitutes an upper deck 15 located above the fork insertion hole 12. At the front and rear end portions and the central portion of the pallet 11, a rectangular plate-shaped lower end rail 24a and a central lower rail 24b extending along a horizontal plane are installed so as to connect the lower ends of both girders 21 and 22. ing. These end girder 21, middle girder 2
2, the upper bar 23 and the lower end bar 24a form a pair of left and right fork insertion openings 12a that form an opening of the fork insertion hole 12 at both front and rear ends of the pallet 11. Also, on the lower surface of this pallet 11, adjacent girders 2
With the lower crosspieces 24a and 24b connecting the 1 and 22 vertically and horizontally,
The deck surface of the lower deck formed in a grid pattern (rice field shape) is formed.

As shown in FIG. 1, FIG. 4 and FIG.
Reference numeral 1 denotes an upper girder member 31 in the form of a long quadrangular prism (substantially long quadrangular cylinder) hung on both sides of the upper deck member 13, and a long quadrangular prism (substantially long quadrangular shape) standing on both sides of the lower deck member 14. And a lower girder member 32 having a tubular shape. The upper and lower girder members 31, 32 are formed in the same size and shape, and are vertically symmetrical with respect to a welding surface as a boundary surface between the both girder members 31, 32. .

As shown in FIG. 1A, the upper girder member 31
An upper cylindrical body 33 formed in the shape of an oblong square is hung from the lower edge of the upper deck 15 to the lower end of the upper girder member 31 so as to extend in the up-down direction. Upper girder member 31
A longitudinal rib 34 as a second reinforcing rib extending in the front-rear direction (longitudinal direction of the upper girder member 31) is provided at the center in the lateral direction of the so as to be parallel to the fork insertion hole 12. The longitudinal ribs 34 extend so as to connect the front and rear ends of the upper tubular body 33, and hang down from the lower surface of the upper deck 15 so as to extend in the vertical direction. Further, the front and rear ends of the longitudinal rib 34 are formed so as to connect the upper and lower ends of the upper girder member 31, and the central portion is formed so as to have a height to the upper portion or the upper end portion of the upper girder member 31. ing.

At the center of the upper girder member 31 in the longitudinal direction,
A pair of front and rear short ribs 35 and a partition plate 36 are provided as reinforcing ribs extending in a direction orthogonal to the fork insertion hole 12 (short side direction of the upper girder member 31) at predetermined intervals.
The short ribs 35 and the partition plate 36 are extended so as to connect the left and right side portions of the upper tubular body 33, and are hung so as to extend in the vertical direction from the lower surface of the upper deck 15. The center portion of the short rib 35 located on the inner side of the pallet 11 with respect to the center of the end girder 21 (longitudinal rib 34) is formed so as to have a height to the upper portion or the upper end portion of the upper girder member 31. It is formed so as to connect the upper and lower ends of the upper girder member 31. The partition plate 36 is formed so as to connect the upper and lower ends of the upper girder member 31 as a whole, and partitions the inside of the girder member 31. Further, between the short ribs 35 and the partition plate 36, an outer short rib 37 and an inner short rib extending from one side surface of the long rib 34 toward the outer side or the inner side of the pallet 11. Ribs 38 are provided.

As shown in FIGS. 1 (a) and 6, between the short ribs 35 and the partition plate 36, the pallet is formed from the inner surface of the outer wall 33a of the upper cylindrical body 33 constituting both sides of the pallet 11. A Y-shaped rib 41 is provided so as to project inward of the reference numeral 11. The Y-shaped rib 41 is provided on the upper cylindrical body 33.
Base plate 4 in the shape of a rectangular plate extending from the inner surface of the outer wall 33a of the
1a and a pair of branch plates 41b extending from the tip edge of the base plate 41a while branching in an oblique direction are formed into a bottom Y-shape.

A base plate 41a located at the base end of the Y-shaped rib 41 is provided so as to project from the inner side surface of the outer wall 33a of the upper cylindrical body 33 in a direction orthogonal to the side wall 33a. The tip of the base plate 41a is arranged at an intermediate position between the side wall 33a and the longitudinal rib 34. Further, the base plate 41a is suspended from the lower surface of the upper deck 15 so as to extend in the vertical direction so as to connect the upper and lower ends of the upper girder member 31.

The pair of branch plates 41b located at the tip of the Y-shaped rib 41 are connected to the tip edge of the base plate 41a.
Short ribs 35 or partition plates 3 located near the long ribs 34
6 is extended so as to connect diagonally with one side surface. Further, the branch plate 41b is hung from the lower surface of the upper deck 15 so as to extend in the vertical direction, and is formed in a rectangular plate shape extending in the vertical direction so as to connect the upper and lower ends of the upper girder member 31. ing.

On the other hand, the Y-shaped ribs 41 are provided on the outer sides of the upper girder members 31 located on both sides of the pallet 11.
And a pair of adjoining reinforcements formed in a substantially B shape on the bottom surface by the outer wall 33a of the upper cylindrical body 33, the short ribs 35, and the partition plate 36 (outer end portion) that are in contact with the Y-shaped rib 41. Partition columns 42 are formed. This reinforcing partition 42
Is erected on the outer side of the upper girder member 31 so as to form a columnar structure extending in the vertical direction, and has a high reinforcing effect against loads applied in the vertical direction and the lateral direction. Further, the pair of reinforcing partition columns 42 arranged adjacent to each other are formed in a substantially B-shaped cross section while sharing the base plate 41a, and further with respect to loads applied in the vertical direction and the horizontal direction. Has a high reinforcing effect.

The Y-shaped rib 41 located at the central portion of the pair of reinforcing partition columns 42 is used when the fork (tip portion) abuts against the outer wall 33a of the upper cylindrical body 33 constituting the outer portion of the pallet 11. It is provided to reinforce. The pair of branch plates 41b forming each Y-shaped rib 41 are inclined at the same angle so as to be bilaterally symmetric with respect to an extension line extending in the extending direction of the base plate 41a when viewed from the bottom surface. It is arranged so that the impact is evenly distributed when the fork is struck.

Further, the short rib 35 and the partition plate 36 which are adjacent to each other
The distance between and is preferably less than or equal to the lateral width of the fork (about 100 to 150 mm), and more preferably less than or equal to 100 mm, in order to receive the impact when the fork is abutted without leakage. For the same reason, the distance between the base plates 41a of the adjacent Y-shaped ribs 41 is preferably equal to or less than the lateral width of the fork (about 100 to 150 mm), more preferably 100 mm or less. Furthermore, each Y
In the character-shaped rib 41, the shortest distance between the tips of the pair of branch plates 41b is preferably 100 mm or less.

On the other hand, in the Y-shaped rib 41, the thickness of the branch plate 41b is configured to be thinner than the average thickness of the general part (including the base plate 41a) forming the pallet 11. The weight of the pallet 11 can be effectively reduced. For example, the thickness of the base plate 41a is 4 mm, and the thickness of the branch plate 41b is 3.6 mm. The thickness of the branch plate 41b is preferably about 5 to 20%, more preferably 10 to 15%, than the thickness of the general portion of the pallet 11 such as the base plate 41a.
It is good that it is configured to be thin. When the thickness of the branch plate 41b is less than 80% of the thickness of the general portion, the physical strength of the branch plate 41b decreases, and it becomes difficult for the branch plates 41b to effectively receive a large impact. There is a risk. On the other hand, if it exceeds 95%, it may not be possible to sufficiently reduce the weight of the pallet 11.

The lower girder member 32 is formed in a long quadrangular prism shape (substantially a long quadrangular cylinder shape) and is erected on both sides of the lower deck member 14. The lower girder member 32 is exactly the same as the upper girder member 31 except that the lower girder member 32 is configured to be upside down with respect to the upper girder member 31. Therefore,
In the following description, the member name of the structure corresponding to the upper cylindrical body 33 provided in the lower girder member 32 will be referred to as the lower cylindrical body 43, and other than that, the same member name will be used including the outer wall 33a and the inner side wall 33b. Shall be used.

As shown in FIG. 1, FIG. 4 and FIG.
Reference numeral 2 denotes a second upper girder member 51 having a long quadrangular prism shape (substantially a long quadrangular cylinder shape) hung at the central portion of the upper deck member 13 and a long quadrangular prism (substantially rectangular) erected at the central portion of the lower deck member 14. The second lower girder member 52 is in the form of a rectangular tube.
These girder members 51 and 52 have substantially the same configuration except that the Y-shaped rib 41 of the girder members 31 and 32 is not provided.

Next, the operation of the pallet 11 will be described. The pallet 11 is manufactured by separately injection-molding the upper deck member 13 and the lower deck member 14 and then welding the lower end surface of the upper deck member 13 and the upper end surface of the lower deck member 14. At this time, the lower end surface of the Y-shaped rib 41 provided on the upper deck member 13 and the upper end surface of the Y-shaped rib 41 provided on the lower deck member 14 are welded to each other, and the upper and lower deck members 13, 1
4 contributes to increase the welded area. This pallet 11 has two forks of a forklift or a handlift inserted into a fork insertion hole 12 through a pair of left and right fork insertion openings 12a opened at its front end or rear end, and then the forks are moved to a predetermined height. Be lifted and transported.

When the tip of the fork is intentionally or unintentionally abutted to one side of the pallet 11, first, the outer surfaces of the outer walls 33a of the upper and lower cylindrical bodies 33, 43 are locally attached. Impact is applied, and the side wall 33a is slightly pressed and deformed toward the inner side of the pallet 11. It should be noted that the deformation is used for the sake of convenience in explaining the propagation path of the impact, and it is a minute deformation that is almost invisible, and the original shape after the transient deformation is achieved. It is reversible. The slight reversible deformation caused by this impact is caused by the short ribs 3 located near the impact point.
5, partition plate 36, external short rib 37 or Y-shaped rib 41
Is transmitted to the base plate 41a.

When most of the slight reversible deformation due to the impact is transmitted to the short ribs 35, the fine reversible deformations are sequentially propagated to the short ribs 35 from the base end portion to the central portion. A part of it is transmitted to the upper deck 15 and the lower deck and attenuated. Further, the minute reversible deformation is further attenuated while slightly pulling the one branch plate 41b joined to the short rib 35 inward of the pallet 11. In addition, the ultrafine reversible deformation transmitted to the branch plate 41b is transmitted to the base plate 41a of the Y-shaped rib 41 and the outer walls 33a of the cylindrical bodies 33 and 43 and further attenuated. In addition, the ultrafine reversible deformation that has passed through the joint with the branch plate 41b is a huge structure (a wider area than the longitudinal ribs 34 etc.) that is likely to eventually receive impact and deformation. , 43, they are received by the inner side walls 33b, and then dispersed and disappear over the entire end beam 21. Also,
The same is true when most of the reversible deformation due to the impact is transmitted to the partition plate 36.

On the other hand, when most of the reversible deformation due to the impact is transmitted to the base plate 41a of the Y-shaped rib 41, fine reversible deformation is sequentially applied to the base plate 41a from the base end to the tip. While being transmitted, a part is transmitted to the upper deck 15 and the lower deck to be attenuated. Further, the minute reversible deformation branches off from the tip of the base plate 41a and is further attenuated while being transmitted to the left and right branch plates 41b. In addition, the ultra-fine reversible deformation transmitted to both the branch plates 41b causes the central portions of the short ribs 35 and the partition plates 36 joined to the tips of the respective branch plates 41b to the inner side of the pallet 11. It is further attenuated while pulling slightly. Moreover, the ultra-fine reversible deformation transmitted to the short ribs 35 and the partition plate 36 is transmitted to the outer side wall 33a and the inner side wall 33b of the cylindrical bodies 33 and 43, and then dispersed to the entire end girder 21. While disappearing.

In particular, when the impact is applied to the reinforcing partition post 42, in addition to the reinforcing structure centering on the short rib 35, the partition plate 36 or the base plate 41a, the entire reinforcing partition post 42. And the upper deck 15 and the lower deck located above and below the partition pillar 42 have a joint reinforcing effect. Further, the reinforcing effect of the upper deck 15 and the lower deck does not stop only at the upper and lower end portions of the reinforcing partition post 42, but from the base end side to the tip end side of the Y-shaped rib 41.
Furthermore, it also includes an element that can be received while being spread over a large area on the extension line. In particular, when the impact point substantially coincides with the base end portion of the base plate 41a, Y
From the base end side of the V-shaped rib 41 to both the tip end sides, along the pair of extension lines extending in a substantially V-shape in plan view, the deck area for receiving an impact can be further expanded.
As a structure of the Y-shaped rib 41 for enhancing the reinforcing effect, as shown in FIG. 6, an angle α formed by the pair of branch plates 41b is preferably 90 ° or less, more preferably 60 to 90. And more preferably 70-80 °.

Next, the effects exerted by the above embodiment will be described. The pallet 11 of the embodiment is formed into a substantially rectangular plate shape by welding the upper deck member 13 and the lower deck member 14 made of synthetic resin, and also includes a pair of end girders 21 extending along both side edges. , Girder 2 extending parallel to the same side edge
The fork insertion hole 12 is formed between the two. Further, the pallet 11 is provided with a Y-shaped rib 41 formed in a Y-shape in plan view on the outer wall 33a of the end girder 21 facing the fork insertion hole 12. in addition,
The base plate 41a of the Y-shaped rib 41 extends in a direction orthogonal to the outer wall 33a of the end girder 21, and the tip of the branch plate 41b of the Y-shaped rib 41 has a pair of reinforcing ribs (short ribs). 35 and the partition plate 36) while being inclined at a predetermined angle. Further, each of the reinforcing ribs extends in parallel with the base plate 41a of the Y-shaped rib 41, and the outer wall 33a or the inner wall 33 of the end girder 21 formed in the shape of a rectangular tube.
It is joined to b (one of the long side walls of the end beam 21).

For this reason, this pallet 11 has an end girder 21.
Since the Y-shaped rib 41 is provided on the outer side of the
The strength of the outer side wall 33a of the end girder 21 exposed to the outside can be easily increased, and irreversible deformation and damage of the side portion of the pallet 11 due to the fork abutment can be easily prevented. Further, since the Y-shaped rib 41 has an extremely simple and slight structure, it is possible to easily reduce the weight of the pallet 11 without substantially contributing to the weight increase.

Particularly, the base plate 41a of the Y-shaped rib 41 is
Since the extension is provided so as to coincide with the propagation direction of the impact when the fork is struck, the impact is greater than that of the reinforcing rib connected in the oblique 45 ° direction in the modification of the conventional synthetic resin pallet. Can be received very effectively, and the reinforcing effect is extremely high.

Further, the impact propagated to the base plate 41a is efficiently transmitted to the entire end girder 21 while branching in two opposite directions by a pair of branch plates 41b. That is, in this pallet 11, the vector of the impact force propagated from the base plate 41a is branched by the pair of branch plates 41b into the inner side of the pallet 11 and the both front and rear end sides. The impact force to be received by the plate 41b is reduced to about half that of the base plate 41a.
For this reason, unlike the case of the reinforcing rib of the conventional synthetic resin pallet which is propagated only to the inner side of the pallet, it is diffused and received on the inner side and both front and rear end sides of the pallet 11 to be received. The irreversible deformation and damage of the side of the pallet 11 due to the fork abutment can be suppressed more easily.

In addition, since the impact (vector) propagated to each of the branch plates 41b is directly transmitted to the cylindrical bodies 33 and 43 through the short ribs 35 and the partition plate 36, It is difficult to cause reversible deformation and damage of the girder 21. In particular, since the cylindrical bodies 33 and 43 are an integral structure having a larger area than the connecting ribs of the conventional synthetic resin pallet, the ability to receive an impact is remarkably high.

Since the short rib 35 and the partition plate 36 are joined to the inner side wall 33b of the end girder 21 which is in contact with the fork insertion hole 12, the lateral rib 33 passes through the Y-shaped rib 41 from the outer wall 33a of the end girder 21. The propagating shock can be transmitted to the inner wall 33b (whole) facing the shock point. Therefore, since the inner side wall 33b is not locally impacted, the outer side wall 33a located near the impact point.
Compared with, the force of receiving shock is significantly stronger. Further, since the inner side wall 33b can receive a weak impact dispersed through the Y-shaped rib 41 in a wide area, reversible deformation and breakage of the end girder 21 due to fork abutment can be extremely remarkably suppressed. You can

Further, this pallet 11 has short ribs 3
5 and the partition plate 36 are simultaneously joined to the outer side wall 33a of the end girder 21, the inner side wall 33b of the end girder 21.
In addition to the reinforcing effect of the outer wall 33a, the reinforcing effect of the outer wall 33a is simultaneously exhibited. Since the reinforcing effect of the both side walls 33a, 33b is due to the huge structure formed in the entire lateral direction of the end girder 21, it can be synergistically enhanced as the effect of receiving the impact.

・ The entire Y-shaped rib 41 is pallet 11
By configuring the upper and lower end portions of the (end girder 21) to be continuously connected vertically, the shock is integrally received by the entire upper and lower deck members 13, 14, and thus the end girder 21 exposed to the outside. The strength of the outer wall 33a can be significantly increased. That is, since the upper deck 15 and the lower deck located above and below the Y-shaped rib 41 are subjected to the impact at the same time, a remarkably high reinforcing effect can be exhibited as compared with the case where only one of them is applied.

In this pallet 11, short ribs 35
Alternatively, the partition wall 42, the outer wall 33a of the end girder 21, and the Y-shaped rib 41 (half) form the reinforcing partition post 42 on the outer side of the end girder 21. Therefore, the reinforcing partition post 42 formed in the substantially rectangular tube shape can remarkably increase the strength of the outer wall 33a of the end girder 21 exposed to the outside. Furthermore, a short rib 35, a partition plate 36, an end girder 2
The outer side wall 33a of the end girder 21 exposed to the outside is erected by vertically arranging the pair of reinforcing partition posts 42 adjacent to the outer side portion of the end girder 21 by the outer wall 33a of 1 and the Y-shaped rib 41 (whole). The strength can be increased significantly more remarkably.

By forming the branch plate 41b of the Y-shaped rib 41 thin, it is possible to easily and effectively reduce the weight of the pallet 11 while maintaining the necessary and sufficient physical strength.

By constructing the partition plate 36 as a whole so that the upper and lower ends of the pallet 11 are continuously connected in the vertical direction, the shock transmitted through the Y-shaped rib 41 can be very effectively received. It will be possible.

By setting the distance between the pair of tips of the Y-shaped ribs 41 (branch plates 41b) facing each other to 100 mm or less, it becomes easy to make the length of each branch plate 41b appropriate. It is possible to make it difficult to cause reversible deformation and breakage of the branch plates 41b. Further, in each Y-shaped rib 41, the shortest distance between the straight line connecting both ends of the branch plate 41b and the base end of the base plate 41a is preferably 100 mm or less for the same reason.

The Y-shaped rib 41 of the pallet 11 is configured so that the angle α formed by the pair of branch plates 41b is preferably 90 ° or less. When this angle α exceeds 90 °, the vector of the impact force transmitted from each branch plate 41b in the front-rear end direction of the pallet 11 becomes larger than the vector of the impact force transmitted inward of the pallet 11. The short ribs 35 or the partition plates 36 easily cause reversible deformation in the front and rear end directions of the pallet 11. On the other hand, if the angle α is less than 60 °, the impact damping effect due to the diffusion into the above-mentioned substantially V-shaped plane cannot be sufficiently exerted.

This pallet 11 is provided with long ribs 34 as second reinforcing ribs extending in parallel with the fork insertion holes 12 in the end girders 21, and the second reinforcing ribs and the reinforcing ribs (short rib 35 or partition plate). 36), the tip of the branch plate 41b of the Y-shaped rib 41 is joined near the intersection. Therefore, the vector of the impact force propagated to each branch plate 41b is
Since the longitudinal rib 34 receives the vector of the impact force that is branched into the inner side of the pallet 11 and the front end portion or the rear end portion side and is branched in the front-rear direction, the strength of the pallet 11 can be easily increased. It is possible.

The present embodiment may be modified and embodied as follows.・ Pallet 11 for 2-sided, 4-sided, 4-sided, skid type (single-sided)
It is also possible to adopt a four-way configuration of a side-by-side or skid type. Even in the case of such a configuration, the same effect as that of the above embodiment is exhibited.

It should be noted that the pallet 11 is a double-sided two-way insert.
Prepares two upper deck members 13 of the above embodiment,
It is easily manufactured by welding the welding surfaces of the upper deck members 13. Further, the skid type two-way pallet 11 is the upper deck member 1 of the above-described embodiment.
The height of the end girders 21 and the middle girders 22 may be extended if necessary.

On the other hand, the one-sided four-way pallet, the two-sided four-way pallet and the skid type four-way pallet 11 are manufactured in substantially the same manner as the two-way pallet 11. These four-way pallets 11 are the end beams 21 of the above embodiment.
Instead of the middle girder 22, corner girders as end girders at the corners of the pallet 11, intermediate girders as end girders at the center of each side of the pallet 11, and center girders as middle girders at the center of the pallet 11. The girders and the girders are erected, and both are formed in a rectangular tube shape. Further, at the end girder (corner girder or middle girder), the outer wall 3 provided along the outer peripheral edge of the pallet 11.
On the inner surface of 3a, a Y-shaped rib 41 having the same structure as that of the above-described embodiment is provided in a protruding manner. In addition, the tip of the branch plate 41b of the Y-shaped rib 41 extends in parallel with the base plate 41a, and the outer wall 33a or the inner wall 33b of the end girder.
A pair of reinforcing ribs (short ribs 35 and partition plate 3 joined to the
The same structure as 6) is joined.

• Adjacent Y-shaped ribs 41 adjacent to each other. That is, one branch plate 41b tip of one Y-shaped rib 41 and one branch plate 4 of the other Y-shaped rib 41.
The tip of 1b is joined to the opposite side surfaces of the same reinforcing rib, and the side surfaces (short rib 35 or partition plate 36) of the pair of adjacent reinforcing partition columns 42 are brought into close contact with each other.

O Omission of the longitudinal ribs 34. -The base plate 41a may be formed to have the same thickness as the branch plate 41b.・ Pallet 1 rather than the center of the girder 21 (longitudinal rib 34)
Reinforcing ribs (short ribs 35 or partition plates 36) located on the outer side of 1 should be provided only on the upper portion (upper end portion) and lower portion (lower end portion) of the end girder 21.

Each branch plate 41b does not need to be extended along a straight line that extends obliquely when viewed from the plane or the bottom surface. For example, the central portion is slightly inward or outward of the pallet 11. It may be formed so as to bulge out.

For example, as shown in FIG. 7, the lower surface of the Y-shaped rib 41 or the branch plate 41b provided in the upper girder member 31 is formed so that the tip end side becomes higher toward the upper surface deck 15 side. thing. Further, the upper surface of the Y-shaped rib 41 or the branch plate 41b provided in the lower girder member 32 is formed so as to be lower toward the lower deck side toward the tip side. The upper surface and the lower surface do not have to extend along a straight line extending in an oblique direction when viewed from the front, and may be formed in an arc shape so as to bulge upward or downward. When configured in this way, the pallet 1 can be sufficiently exerted while the reinforcing effect of the Y-shaped rib 41 is sufficiently exerted.
It is possible to further reduce the weight of item 1 more easily.

Provide the branch plates 41b only on the upper portion (upper end portion) and the lower portion (lower end portion) of the end girder 21. Further, the base plate 41a may be provided only on the upper and lower portions of the end beam 21.

Reinforcing ribs (short ribs 35 or partition plate 3
6) is provided only on the inner side of the pallet 11 with respect to the center (longitudinal rib 34) of the end girder 21. Further, the reinforcing rib (short rib 35 or partition plate 36) may be provided only on the outer side of the pallet 11 than the center (longitudinal rib 34) of the end girder 21.

Further, the technical idea which can be understood from the above embodiment will be described below. The pallet according to any one of claims 1 to 5, wherein the reinforcing rib is joined to an inner side wall of an end girder that is in contact with the fork insertion hole.

The pallet according to any one of claims 1 to 5, wherein the entire reinforcing rib is configured to connect upper and lower ends of the pallet. The pallet according to any one of claims 1 to 5, wherein the distance between the tips of the Y-shaped ribs is 100 mm or less.

The base end portion of the Y-shaped rib is formed so as to connect the upper and lower end portions of the end girder.
6. The pallet according to claim 5. A second reinforcing rib extending parallel to the fork insertion hole is provided in the end girder, and a tip portion of the Y-shaped rib is joined near an intersection of the second reinforcing rib and the reinforcing rib. The pallet according to any one of claims 1 to 5.

A synthetic resin upper deck member and a lower deck member are joined together to form a substantially rectangular plate shape, which is provided with end girders and middle girders, and fork insertion holes are formed between adjacent girders. In the pallet configured as described above, a Y-shaped rib formed in a planar Y-shape is provided on the outer wall of the end beam facing the fork insertion hole so as to project, and the base end of the Y-shaped rib is attached to the end beam of the end beam. The Y-shaped rib extends in a direction orthogonal to the outer wall, and the tip of the Y-shaped rib extends parallel to the base end of the Y-shaped rib and is joined to a reinforcing rib joined to the outer wall or inner wall of the end girder. A pallet characterized by that. With such a configuration, it is possible to increase the strength of the outer side wall of the end girder exposed to the outside while effectively reducing the weight, and to effectively prevent the fork from being damaged by abutting.

-It is composed of a synthetic resin upper deck member formed in a substantially square plate shape, and is provided with end girders and middle girders,
In a pallet configured to form a fork insertion hole between adjacent girders, a Y-shaped rib formed in a plane Y shape is projected on an outer wall of an end girder facing the fork insertion hole, and the Y A base end portion of the V-shaped rib extends in a direction orthogonal to the outer wall of the end girder, and a tip end of the Y-shaped rib extends parallel to the base end portion of the Y-shaped rib and an outer wall of the end girder. Alternatively, a pallet characterized by being joined to a reinforcing rib joined to the inner wall. With such a configuration, it is possible to increase the strength of the outer side wall of the end girder exposed to the outside while effectively reducing the weight, and to effectively prevent the fork from being damaged by abutting.

[0060]

As described in detail above, the present invention has the following effects. According to the pallet of the invention described in any one of claims 1 to 5, the weight of the pallet is reduced, the strength of the outer wall of the end girder exposed to the outside is increased, and the damage due to the abutment of the fork is effectively prevented. You can

[Brief description of drawings]

FIG. 1A is a bottom view showing a part of an upper deck member of an embodiment, and FIG. 1B is a plan view showing a part of a lower deck member of the same.

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

FIG. 3 is a bottom view showing a part of the lower deck member of the embodiment.

FIG. 4 is a front cross-sectional view showing the pallet seen from line 4-4 of FIG.

5A is a side sectional view showing the pallet seen from the line 5a-5a in FIG. 1, and FIG. 5B is a side sectional view showing the pallet seen from the line 5b-5b.

FIG. 6 is a partially enlarged bottom view showing an enlarged part of the pallet shown in FIG.

FIG. 7 is a front sectional view showing a part of a pallet other than the embodiment.

[Explanation of symbols]

11 ... Pallet, 12 ... Fork insertion hole, 13 ... Upper deck member, 14 ... Lower deck member, 21 ... End girder, 22 ...
Middle girder, 33a ... Outer side wall of end girder, 33b ... Inner side wall of end girder,
35 ... Short ribs as reinforcing ribs, 36 ... Partition plates as reinforcing ribs, 41 ... Y-shaped ribs, 41a ... Base plate as base end of Y-shaped ribs, 41b ... Tip of Y-shaped ribs Branch plate, 42 ... Reinforcing partition pillar.

Claims (5)

[Claims] 1. A substantially square plate shape is formed by joining an upper deck member and a lower deck member made of synthetic resin,
In a pallet configured to form a fork insertion hole between a pair of end girders extending along both side edges and a middle girder extending parallel to the side edges, an outer wall of the end girder facing the fork insertion hole. Y-shaped ribs formed in a planar Y-shape are projected on the base, and the base ends of the Y-shaped ribs are extended in a direction orthogonal to the outer wall of the end girder, and the tips of the Y-shaped ribs are attached. A pallet, which extends in parallel with a base end portion of the Y-shaped rib and is joined to a reinforcing rib joined to an outer wall or an inner wall of the end girder. 2. A fork between a pair of end girders formed along a side edge and formed of a synthetic resin upper deck member formed in a substantially square plate shape, and a middle girder extending parallel to the side edge. In a pallet configured to form an insertion hole, a Y-shaped rib formed in a planar Y shape is projected on an outer wall of an end girder facing the fork insertion hole, and a base end of the Y-shaped rib is formed. A portion extending in a direction orthogonal to the outer wall of the end girder, the tip of the Y-shaped rib extending parallel to the base end of the Y-shaped rib, and joined to the outer wall or inner wall of the end girder. A pallet characterized by being joined with reinforcing ribs. 3. The pallet according to claim 1, wherein the entire Y-shaped rib is configured to connect upper and lower end portions of the pallet. 4. The reinforcing rib is joined to the outer wall of the end spar, and the reinforcing rib is formed so as to connect between the upper and lower ends of the pallet, and the reinforcing rib, the outer wall of the end spar and the Y-shape. The pallet according to claim 3, wherein a reinforcing partition pillar is erected on the outer side of the end girder by a rib. 5. The pallet according to claim 1, wherein a tip portion of the Y-shaped rib is formed thin.