JP3987365B2 - palette - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin pallet which is provided with a fork insertion hole for inserting a fork of a forklift and is used for transporting a load such as a tile. More specifically, the present invention relates to a pallet configured to increase the strength of the pallet during transportation using a forklift.
[0002]
[Prior art]
Conventionally, this type of synthetic resin pallet includes, for example, a pair of upper and lower upper and lower decks formed in a square plate shape, and end girders and middle girders formed in a long rectangular tube shape. It has been known. In this synthetic resin pallet, a pair of end girders are erected along both side edges of the lower deck, and a middle girder is erected at the center of the both end girders so as to be parallel to the end girders. Further, upper end decks are supported on upper ends of these end girders and middle girders, and a pair of fork insertion holes are opened between the upper side decks, the lower side decks, and adjacent girders.
[0003]
A plurality of vertical ribs extending in the vertical direction with a predetermined interval project from the wall surface constituting the end beam. In addition, a plurality of partition plates extending in the short direction of the end girder are provided at predetermined intervals in the same girder, and the inside of the end girder is partitioned into a plurality of sections. These partition plates are provided so as to connect the long side walls facing the end girders in a direction orthogonal to the fork insertion holes and to connect the upper deck and the lower deck in the vertical direction. These vertical ribs and partition plates effectively receive the load applied to the end girders in the vertical direction, and the strength of the pallet is increased.
[0004]
[Problems to be solved by the invention]
However, since the vertical ribs and partition plates of the conventional synthetic resin pallet are both extended in the direction perpendicular to the fork insertion hole, they exhibit extremely high strength against the load applied in the extending direction. However, sufficient strength could not be exhibited with respect to a load applied in a direction shifted from the extending direction. For this reason, especially when a fork is inserted into the fork insertion hole and transported, loads are randomly applied to the end girders from various directions as compared to the middle girder sandwiched between the pair of forks. There were many cases, and it was difficult for these vertical ribs and partition plates to obtain sufficient strength against these loads.
[0005]
The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide a pallet configured to easily increase the strength of the pallet when the fork is inserted into the fork insertion hole and transported while reducing the weight.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the invention of the pallet according to claim 1 is formed in a substantially square plate shape by joining an upper deck member and a lower deck member made of synthetic resin, along both side edges. In a pallet configured to form a fork insertion hole between a pair of extending end girders and a middle girder extending parallel to the same side edge, a flat Y-shape is formed on the inner wall of the end girder in contact with the fork inserting hole. The formed Y-shaped rib protrudes, and the base end of the Y-shaped rib extends in a direction orthogonal to the inner wall of the end beam.
[0007]
The invention of the pallet according to claim 2 is constituted by an upper deck member made of synthetic resin formed in a substantially square plate shape, and a pair of end beams extending along both side edges, and extending in parallel with the side edges. In the pallet configured to form a fork insertion hole between the spar, a Y-shaped rib formed in a planar Y shape is projected on the inner wall of the end spar in contact with the fork insertion hole, and the Y The base end portion of the letter-shaped rib extends in a direction orthogonal to the inner wall of the end girder.
[0008]
The invention of the pallet according to claim 3 is the invention according to claim 1 or 2, wherein the end of the Y-shaped rib extends in parallel with the base end of the Y-shaped rib and the end beam. It is characterized in that it is joined to a reinforcing rib joined to the inner wall or the outer wall.
[0009]
The invention of the pallet according to claim 4 is the invention according to claim 3, wherein the reinforcing rib is joined to the inner wall of the end beam, and the reinforcing rib and the Y-shaped rib are connected to the upper and lower ends of the pallet. A reinforcing partitioning column is erected on the inner side of the end girder by the reinforcing rib, the inner wall of the end girder, and the Y-shaped rib.
[0010]
The invention of the pallet according to claim 5 is characterized in that, in the invention according to any one of claims 1 to 4, the tip of the Y-shaped rib is formed thin.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 2, the pallet 11 of the embodiment is formed in a substantially square plate shape (rectangular shape, planar square shape) from synthetic resin, and has a one-sided two-way configuration. That is, the pallet 11 is provided with a total of two (one pair) fork insertion holes 12 for inserting forks of forklifts and handlifts. After the upper deck member 13 and the lower deck member 14 are separately injection-molded, the pallet 11 is integrated by welding the lower end surface of the upper deck member 13 and the upper end surface of the lower deck member 14. The upper end surface of the pallet 11 is an upper surface deck 15 extending along a horizontal plane, and a pair of left and right forks opened on one side portion of the pallet 11 with a mounting object (not shown) placed on the upper surface deck 15 is inserted. A forklift or a handlift fork is inserted into the hole 12 and transported.
[0012]
As shown in FIGS. 1 to 5, a pair of left and right end girders 21 formed in the shape of a long rectangular column (substantially long rectangular tube shape) are provided on both sides of the pallet 11 along both side edges of the pallet 11. ing. At the center position between the two end beams 21, that is, at the center portion of the pallet 11, a middle beam 22 formed in a long rectangular column shape (substantially long rectangular tube shape) extends in parallel with the end beam 21 and the fork insertion hole 12. It is erected. The pair of left and right end girders 21 and middle girder 22 support the top deck 15 at a predetermined height while opening the fork insertion hole 12 in the pallet 11.
[0013]
Between the end beam 21 and the middle beam 22, a long rectangular plate-like upper bar 23 extending along the horizontal plane is provided so as to connect the upper ends of the beams 21 and 22. The upper surface deck 15 located above is comprised. At both the front and rear end portions and the central portion of the pallet 11, a long rectangular plate-like end lower frame 24a and a central lower frame 24b extending along the horizontal plane are connected so as to connect the lower ends of both girders 21 and 22. ing. A pair of left and right fork insertion ports 12a constituting an opening of the fork insertion hole 12 is formed at both front and rear ends of the pallet 11 by the end beam 21, the middle beam 22, the upper beam 23, and the lower edge beam 24a. . In addition, on the lower surface of the pallet 11, a deck surface of a lower deck formed in a bottom lattice shape (field shape) is formed by lower bars 24a and 24b connecting the adjacent beams 21 and 22 vertically and horizontally. .
[0014]
As shown in FIGS. 1, 4, and 5, the end girder 21 includes a long quadratic columnar (substantially long rectangular tube-shaped) upper girder member 31 suspended from both sides of the upper deck member 13, and a lower deck member 14. And a lower girder member 32 having a long rectangular column shape (substantially long rectangular tube shape) standing on both side portions. These upper and lower girder members 31 and 32 are both formed in the same size and shape, and are configured to be vertically symmetric with respect to a welding surface as a boundary surface between both girder members 31 and 32. .
[0015]
As shown in FIG. 1 (a), an upper cylinder 33 formed in the shape of a long rectangular tube extends vertically from the lower surface of the upper deck 15 to the lower end of the upper beam member 31 at the periphery of the upper beam member 31. Is drooping. 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 short direction of the upper girder member 31 so as to be parallel to the fork insertion hole 12. . The longitudinal ribs 34 extend so as to connect the front and rear end portions of the upper cylindrical body 33 and are suspended from the lower surface of the upper deck 15 so as to extend in the vertical direction. Further, the front and rear end portions of the longitudinal rib 34 are formed so as to connect the upper and lower end portions of the upper girder member 31, and the central portion is formed so as to reach the top or the upper end portion of the upper girder member 31. ing.
[0016]
A pair of front and rear short ribs 35 as a reinforcing rib extending in a direction perpendicular to the fork insertion hole 12 (a short direction of the upper girder member 31) and a partition at a central portion in the longitudinal direction of the upper girder member 31. A plate 36 is provided. The short ribs 35 and the partition plate 36 are extended so as to connect the left and right side portions of the upper cylindrical body 33 and are suspended from the lower surface of the upper surface deck 15 so as to extend in the vertical direction. The center part of the short rib 35 located on the outer side of the pallet 11 with respect to the center of the end girder 21 (longitudinal rib 34) is formed to be the height to the upper part or upper end part of the upper girder member 31, and the others The upper girder member 31 is formed so as to connect the upper and lower ends. The partition plate 36 is formed so as to connect the upper and lower end portions of the upper girder member 31 as a whole, and divides the girder member 31 into a plurality of sections.
[0017]
As shown in FIGS. 1A and 6, between the short rib 35 and the partition plate 36, the inner side wall 33 a (one long side wall) of the upper cylindrical body 33 in contact with the fork insertion hole 12 is from the inner side surface. A Y-shaped rib 41 projecting outward from the pallet 11 is provided. The Y-shaped rib 41 includes a long rectangular plate-like base plate 41a extending from the inner side surface of the inner side wall 33a of the upper cylindrical body 33, and a pair of branch plates extending while branching in an oblique direction from the leading edge of the base plate 41a. It is formed in the bottom Y-shape from 41b.
[0018]
The base plate 41a located at the base end portion of the Y-shaped rib 41 protrudes from the inner side surface of the inner side wall 33a of the upper cylindrical body 33 so as to extend in a direction orthogonal to the side wall 33a. The tip of is disposed at an intermediate position between the side wall 33 a and the longitudinal rib 34. Further, the base plate 41 a 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 end portions of the upper girder member 31.
[0019]
The pair of branch plates 41b located at the tip of the Y-shaped rib 41 includes a tip edge of the base plate 41a, a short rib 35 located near the long rib 34, or a central portion of one side of the partition plate 36. It is extended so that it may be connected diagonally. Further, the branch plate 41b is suspended from the lower surface of the upper deck 15 so as to extend in the vertical direction, and is formed in a long rectangular plate shape extending in the vertical direction so as to connect the upper and lower end portions of the upper girder member 31. ing.
[0020]
On the other hand, on the inner side of the upper girder member 31 close to the fork insertion hole 12, the Y-shaped rib 41, the inner side wall 33a of the upper cylindrical body 33 in contact with the Y-shaped rib 41, the short rib 35, and The partition plate 36 (inner end portion) forms a pair of adjacent reinforcing partitioning columns 42 formed in a substantially inverted B shape on the bottom surface. The reinforcing partitioning column 42 is erected on the inner 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 horizontal direction. ing. Further, the pair of reinforcing partitioning columns 42 arranged adjacent to each other are formed in a substantially inverted B-shaped plane cross section while sharing the base plate 41a, and with respect to loads applied in the vertical and lateral directions. Furthermore, it has a high reinforcing effect.
[0021]
The Y-shaped rib 41 located at the center of the pair of reinforcing partitioning columns 42 is provided to reinforce the upper girder member 31 when the pallet 11 is transported mainly using a forklift. The pair of branch plates 41b constituting each Y-shaped rib 41 are inclined at the same angle so as to be symmetrical 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 it can stably receive loads from various directions applied from a fork or a mounted object.
[0022]
Further, the distance between the adjacent short ribs 35 and the partition plate 36 is preferably 100 mm or less in order to stably receive the load from the various directions. For the same reason, the distance between the base plates 41a of the adjacent Y-shaped ribs 41 and the shortest distance between the tips of the pair of branch plates 41b in each Y-shaped rib 41 are preferably 100 mm or less. .
[0023]
On the other hand, in the Y-shaped rib 41, the thickness of the branch plate 41 b is configured to be thinner than the average thickness of the general part (including the base plate 41 a) constituting the pallet 11. Can be effectively reduced in weight. For example, the base plate 41a has a thickness of 4 mm, and the branch plate 41b has a thickness of 3.6 mm. The thickness of the branch plate 41b is preferably about 5 to 20%, more preferably about 10 to 15% thinner than the thickness of the general part of the pallet 11 such as the base plate 41a. It is good to be. When the thickness of the branch plate 41b is less than 80% of the thickness of the general part, the physical strength of the branch plate 41b is lowered, and it may be difficult to effectively receive the load by the branch plate 41b. There is. On the other hand, if it exceeds 95%, the pallet 11 may not be sufficiently lightened.
[0024]
The lower girder member 32 is formed in a long rectangular column shape (substantially long rectangular tube 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 cylinder 33 provided in the lower girder member 32 is the lower cylinder 43, and the other members including the inner wall 33a and the outer wall 33b are the same members. The name shall be used.
[0025]
As shown in FIGS. 1, 4 and 5, the middle girder 22 includes a second upper girder member 51 having a long rectangular column shape (substantially long rectangular tube shape) suspended from the center of the upper deck member 13, and a lower deck. The second lower girder member 52 having a long quadrangular prism shape (substantially long rectangular tube shape) is provided at the center of the member 14. These girder members 51 and 52 have substantially the same configuration except that the Y-shaped rib 41 in the girder members 31 and 32 is not provided.
[0026]
Next, the operation of the pallet 11 will be described.
The pallet 11 is manufactured by separately 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, This contributes to an increase in the welding area between the fourteen. The pallet 11 is inserted into the fork insertion hole 12 from a pair of left and right fork insertion openings 12a opened at the front end portion or the rear end portion thereof. It is transported while being lifted.
[0027]
At this time, loads in various directions applied from the mounted object and the fork are transmitted to the end beam 21 of the pallet 11 while changing through the upper surface deck 15. Among these various loads, a short rib 35 and a partition plate 36 extending in the same direction effectively catch the load applied in the short direction of the end beam 21 which is the largest and main load. . Further, a part of the load in the short direction of the end girder 21 is transmitted to the Y-shaped rib 41, and in a vertical plane passing through the base plate 41a with the base end portion or the center portion of the Y-shaped rib 41 as the center. It acts as a bending force that is invisible to the eye and is received by the tip of the Y-shaped rib 41 (branch plate 41b). That is, the bending force is received by the entire (virtual) fan-shaped wall surface of the top deck 15 having the upper ends of the pair of branch plates 41b as both side edges, and the lower ends of the branch plates 41b as both side edges. It can be received by the entire fan-shaped wall of the bottom deck.
[0028]
On the other hand, among the various loads, the Y-shaped rib 41, particularly the pair of branch plates 41b, mainly receives loads applied in directions other than the short direction of the end beam 21. That is, since the short rib 35 and the partition plate 36 are both extended only in the short direction of the end girder 21 (the direction orthogonal to the fork insertion hole 12), only the vertical surface on which the bending force acts is provided. A one-dimensional high reinforcing effect is exhibited. However, the reinforcing effect spreading along the top deck 15 (horizontal plane) can hardly be exhibited.
[0029]
On the other hand, the branch plate 41b has a reinforcing structure against the fan-shaped wall surface of the upper surface deck 15 and the lower surface deck while having the one-dimensional reinforcing effect, and thus has a two-dimensional reinforcing effect. The load applied in the direction other than the short direction of the end beam 21 can be received very effectively. In particular, when the fork is inserted into the fork insertion hole 12 and transported, a local twisting force is applied to the Y-shaped rib 41 in the vicinity of the upper beam 23 with which the front end and the base end of the fork come into contact. In many cases, the reinforcing effect of the Y-shaped rib 41 against such a twisting force is extremely high because it is two-dimensional.
[0030]
On the other hand, this pallet 11 also exhibits extremely high strength in the bending strength test based on JIS Z 0602. In addition, as a structure of the Y-shaped rib 41 for enhancing the reinforcing effect, as shown in FIG. 6, an angle α formed by a pair of branch plates 41b is preferably 90 ° or less, more preferably 60 to 90. °, more preferably 70 to 80 °.
[0031]
Next, the effect exhibited by the above embodiment will be described.
The pallet 11 of the embodiment is formed in a substantially square plate shape by welding an upper deck member 13 and a lower deck member 14 made of synthetic resin, and a pair of end girders 21 extending along both side edges The fork insertion hole 12 is formed between the side edge and the middle girder 22 extending in parallel. Further, the pallet 11 is provided with a Y-shaped rib 41 formed in a plane Y shape on the inner wall 33a of the end beam 21 in contact with the fork insertion hole 12, and a base portion of the Y-shaped rib 41. The plate 41 a extends in a direction orthogonal to the inner wall 33 a of the end beam 21.
[0032]
For this reason, since this pallet 11 is provided with the Y-shaped rib 41 on the inner side of the end beam 21, the upper beam 23 and the end beam 21 when the fork is inserted into the fork insertion hole 12 and conveyed. It is possible to easily increase the strength of the entire pallet 11 centering on the joint. Furthermore, since the Y-shaped rib 41 has a very simple and light configuration, the weight of the pallet 11 can be easily reduced without substantially contributing to an increase in weight.
[0033]
In particular, since the base plate 41a of the Y-shaped rib 41 is extended so as to coincide with the direction in which the largest load is applied during transportation using a forklift, the load can be received very effectively. . Furthermore, since the base plate 41a transmits the load to the pair of branch plates 41b very efficiently, the strength of the entire pallet 11 can be more easily increased. That is, the pair of branch plates 41b transmit the load to the upper deck 15 and the lower deck while branching in two opposite directions. For this reason, in this pallet 11, when the load propagated from the base plate 41a is propagated while branching to the pair of branch plates 41b, the load applied to each branch plate 41b is reduced to about half. Furthermore, since each branch plate 41b is disposed so as to distribute the reduced load to the outside of the pallet 11 and the front end portion or the rear end portion side, the reinforcing effect is extremely high. In addition, the pair of branch plates 41b of the Y-shaped rib 41 is configured to receive a load two-dimensionally on the entire upper surface deck 15 and the lower surface deck fan-shaped wall surfaces having both upper and lower ends as both side edges. Therefore, it is possible to very effectively receive a torsional force applied in a direction other than the extending direction of the base plate 41a.
[0034]
Therefore, the Y-shaped rib 41 provided on the inner side of the end beam 21 receives the base plate 41a for strongly receiving the most main load and the random (various) loads other than the main load. And a pair of branch plates 41b. Further, the base plate 41a can efficiently transmit the various loads to the branch plate 41b, and the branch plate 41b can receive the main load as an auxiliary. Can exhibit a synergistic reinforcing effect.
[0035]
The pallet 11 is configured such that the entire Y-shaped rib 41 continuously connects the upper and lower ends of the pallet 11 (end girder 21) vertically. For this reason, the pallet 11 can construct a two-dimensional reinforcing structure against the background of the fan-shaped wall surfaces of the upper deck 15 and the lower deck, and also three-dimensionally (three-dimensionally) connecting the upper and lower fan-shaped wall surfaces. Can be constructed at the same time. Further, the Y-shaped rib 41 can simultaneously build the two-dimensional and three-dimensional reinforcing structures between the inner wall 33a of the end beam 21 and the branch plate 41b. Can be remarkably increased in strength.
[0036]
In the pallet 11, the tip of the Y-shaped rib 41 extends in parallel with the base plate 41 a of the Y-shaped rib 41, and the inner wall 33 a or the outer wall 33 b of the end beam 21 (one of the end beams 21). It is joined to a pair of reinforcing ribs (the short rib 35 and the partition plate 36) joined to the long side wall. For this reason, the Y-shaped rib 41 has a strong two-dimensional reinforcing structure reinforced by a reinforcing rib between the branch plate 41b and the inner wall 33a or the outer wall 33b of the end beam 21. Therefore, it becomes possible to receive the load in a wider area.
[0037]
In particular, in the pallet 11, the pair of reinforcing ribs are joined to the outer wall 33 b of the end girder 21 extending along the outer edge of the pallet 11, so that the Y-shape extends from the inner wall 33 a of the end girder 21. The main load propagated through the rib 41 can be transmitted to the opposing outer wall 33b (entire). For this reason, since the outer wall 33b is not applied with an extremely large load, the force for receiving the load is significantly stronger than the inner wall 33a to which the main load is directly applied. Further, the outer side wall 33b has an advantage that a weak load distributed through the Y-shaped rib 41 can be received in a wide area.
[0038]
In this pallet 11, a reinforcing partition column 42 is erected on the inner side of the end beam 21 by the short rib 35 or the partition plate 36, the inner wall 33 a of the end beam 21, and the Y-shaped rib 41 (half). Has been. For this reason, the reinforcing partition column 42 formed in a substantially square cylindrical shape causes loads in all directions applied when the fork is inserted into the fork insertion hole 12 and transported, and loads applied in the vertical direction by the mounted object. Can be received very effectively. Further, a pair of reinforcing partitioning columns 42 adjacent to the inner side of the end beam 21 are erected by the short ribs 35, the partition plate 36, the inner wall 33a of the end beam 21 and the Y-shaped rib 41 (whole). Further, the strength of the pallet 11 can be remarkably increased.
[0039]
-By forming the branch plate 41b of the Y-shaped rib 41 to be thin, it is possible to easily and effectively reduce the weight of the pallet 11 while maintaining necessary and sufficient physical strength.
[0040]
-By making the distance between a pair of opposing tips of the Y-shaped ribs 41 100 mm or less, the pallet 11 can be made to have a light structure while sufficiently exerting the reinforcing effect of the Y-shaped ribs 41. It is easy to achieve both reinforcement and weight reduction. Furthermore, since it is easy to set the base plate 41a and the branch plate 41b to have appropriate lengths for maintaining the strength, it is possible to make it difficult to cause irreversible twisting and deformation of the Y-shaped rib 41. In addition, 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.
[0041]
The pallet 11 is provided with a longitudinal rib 34 as a second reinforcing rib extending in parallel with the fork insertion hole 12 in the end beam 21, and the second reinforcing rib and the reinforcing rib (short rib 35 or partition plate 36), The tip of the branch plate 41b of the Y-shaped rib 41 is joined in the vicinity of the intersection. Therefore, the load propagated to each branch plate 41 b is branched to the inner side of the pallet 11 and the front end portion or the rear end portion side, and a part of the load branched in the front-rear direction is received by the longitudinal ribs 34. Therefore, the strength of the pallet 11 can be easily increased.
[0042]
It should be noted that the present embodiment can be modified and embodied as follows.
-The pallet 11 may be configured to have a two-sided two-way insertion, a one-sided four-way insertion, a two-sided four-way insertion, a skid type (single-sided) two-way insertion, or a skid type four-way insertion. Even in the case of such a configuration, the same effect as the above embodiment is exhibited.
[0043]
The two-sided two-way pallet 11 is easily manufactured by preparing two upper deck members 13 of the above embodiment and welding the welding surfaces of the upper deck members 13 together. The skid type two-way pallet 11 is constituted only by the upper deck member 13 of the above embodiment, and the height of the end beam 21 and the middle beam 22 may be extended as necessary.
[0044]
On the other hand, the pallet 11 of single-sided four-way insertion, double-sided four-way insertion, and skid type four-way pallet 11 is manufactured in substantially the same manner as the two-way pallet 11. These four-way pallets 11 have corner girders as end girders at the corners of the pallet 11 and end girders at the center of each side of the pallet 11 instead of the end girders 21 and the middle girders 22 of the above embodiment. And a central girder as a middle girder in the center of the pallet 11, both of which are formed in a rectangular tube shape. Further, a Y-shaped rib 41 having the same configuration as that of the above-described embodiment protrudes from the inner surface of the inner wall 33a of the end beam (corner beam or intermediate beam). The tip of the branch plate 41b of the Y-shaped rib 41 extends in parallel with the base plate 41a and is connected to a pair of reinforcing ribs (short ribs 35 and partition plates) joined to the inner wall 33a or the outer wall 33b of the end beam. The same structure as that of No. 36) is preferable.
[0045]
-Adhering adjacent Y-shaped ribs 41. That is, the tip of one branch plate 41b of one Y-shaped rib 41 and the tip of one branch plate 41b of the other Y-shaped rib 41 are joined to the opposite side surfaces of the same reinforcing rib, respectively, and adjacent to each other. The side surfaces (short ribs 35 or partition plates 36) of the pair of reinforcing partitioning columns 42 are brought into close contact with each other.
[0046]
• omit the longitudinal ribs 34;
The base plate 41a may be formed to the same thickness as the branch plate 41b.
-Reinforcing ribs (short ribs 35 or partition plates 36) positioned on the inner side of the pallet 11 with respect to the center (longitudinal ribs 34) of the end beams 21 are arranged on the upper (upper end) and lower (lower end) of the end beams ) Only.
[0047]
Each branch plate 41b does not need to be extended along a straight line extending in an oblique direction when viewed from the plane or the bottom surface, for example, the center portion slightly bulges inward or outward of the pallet 11 It may be formed as follows.
[0048]
For example, as shown in FIG. 7, the lower surface of the Y-shaped rib 41 or the branch plate 41 b provided in the upper girder member 31 is formed so as to become higher toward the upper deck 15 side toward the distal end side. Furthermore, 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 become lower toward the lower deck side toward the front end side. The upper and lower surfaces do not need to be extended along a straight line extending obliquely when viewed from the front, and may be formed in an arc shape so as to bulge upward or downward. When comprised in this way, it becomes possible to achieve weight reduction of the pallet 11 still more easily, fully exhibiting the reinforcement effect by the Y-shaped rib 41. FIG.
[0049]
-The branch plate 41b is provided only on the upper part (upper end part) and the lower part (lower end part) of the end beam 21. Furthermore, the base plate 41a may be provided only on the upper and lower portions of the end beam 21.
[0050]
A reinforcing rib (short rib 35 or partition plate 36) is provided only on the outer side of the pallet 11 from the center (longitudinal rib 34) of the end beam 21. Further, the reinforcing rib (short rib 35 or partition plate 36) may be provided only on the inner side of the pallet 11 with respect to the center (longitudinal rib 34) of the end beam 21.
[0051]
Further, the technical idea that can be grasped from the embodiment will be described below.
The pallet according to any one of claims 1 to 5, wherein the entire Y-shaped rib is configured to connect between upper and lower ends of the pallet.
[0052]
The pallet according to any one of claims 1 to 5, wherein a distance between tips of the Y-shaped ribs is set to 100 mm or less.
The pallet according to any one of claims 1 to 5, wherein a base end portion of the Y-shaped rib is formed so as to connect between upper and lower end portions of an end beam.
[0053]
The pallet according to any one of claims 3 to 5, wherein the entire reinforcing rib is configured to connect between upper and lower ends of the pallet.
A second reinforcing rib extending in parallel with the fork insertion hole is provided in the end beam, and the tip of the Y-shaped rib is joined in the vicinity of the intersection of the second reinforcing rib and the reinforcing rib. The pallet according to any one of claims 3 to 5.
[0054]
・ It is formed in a substantially square plate shape by joining the upper deck member and the lower deck member made of synthetic resin, and it is provided with end girders and middle girders, and fork insertion holes are formed between adjacent girders. In the pallet, a Y-shaped rib formed in a planar Y-shape is projected on the inner wall of the end beam contacting the fork insertion hole, and the base end portion of the Y-shaped rib is connected to the inner wall of the end beam A pallet characterized by extending in the orthogonal direction. When comprised in this way, the intensity | strength of the pallet at the time of inserting and conveying a fork in a fork insertion hole can be raised easily, aiming at weight reduction.
[0055]
The fork is inserted in a pallet that is composed of an upper deck member made of synthetic resin formed in a substantially square plate shape, and that has end girders and middle girders so that a fork inserting hole is formed between adjacent girders. A Y-shaped rib formed in a plane Y-shape is projected on the inner wall of the end beam in contact with the hole, and the base end portion of the Y-shaped rib extends in a direction orthogonal to the inner wall of the end beam. A pallet characterized by that. When comprised in this way, the intensity | strength of the pallet at the time of inserting and conveying a fork in a fork insertion hole can be raised easily, aiming at weight reduction.
[0056]
【The invention's effect】
As described in detail above, the present invention has the following effects.
According to the pallet of the invention described in the first to fifth aspects, the strength of the pallet when the fork is inserted into the fork insertion hole and transported can be easily increased while reducing the weight.
[Brief description of the drawings]
FIG. 1A is a bottom view showing a part of an upper deck member of the embodiment, and FIG. 1B is a plan view showing a part of a lower deck member.
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.
4 is a front sectional view showing the pallet as viewed from line 4-4 in FIG. 1. 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 similarly seen from the line 5b-5b.
6 is a partially enlarged bottom view in which a part of the pallet in FIG. 1 (a) is enlarged. FIG.
FIG. 7 is a front sectional view showing a part of a pallet other than the embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Pallet, 12 ... Fork insertion hole, 13 ... Upper deck member, 14 ... Lower deck member, 21 ... End girder, 22 ... Middle girder, 33a ... Inner side wall of end girder, 33b ... Outer wall of end girder, 35 ... Short ribs as reinforcing ribs, 36: partition plates as reinforcing ribs, 41: Y-shaped ribs, 41a: base plates as base ends of Y-shaped ribs, 41b: as tip portions of Y-shaped ribs Branch plate, 42...

Claims (5)

The upper deck member made of synthetic resin and the lower deck member are joined together to form a substantially square plate shape, and between a pair of end girders extending along both side edges and a middle girder extending parallel to the same side edges. In the pallet configured to form a fork insertion hole,
A Y-shaped rib formed in a plane Y-shape is projected on the inner wall of the end beam contacting the fork insertion hole, and the base end of the Y-shaped rib is orthogonal to the inner wall of the end beam. Pallet characterized by extending. A fork insertion hole is formed between a pair of end girders that extend along both side edges and a middle girder that extends in parallel with the side edges, and is composed of a synthetic resin upper deck member formed in a substantially square plate shape. In the pallet configured as follows,
A Y-shaped rib formed in a planar Y-shape is projected on the inner wall of the end beam contacting the fork insertion hole, and the base end of the Y-shaped rib is orthogonal to the inner wall of the end beam. Pallet characterized by extending. 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 the inner wall or the outer wall of the end beam. Or the pallet of Claim 2. The reinforcing rib is joined to the inner wall of the end beam, and the reinforcing rib and the Y-shaped rib are formed so as to connect the upper and lower ends of the pallet,
The pallet according to claim 3, wherein a reinforcing partition column is erected on the inner side of the end beam by the reinforcing rib, the inner wall of the end beam, and the Y-shaped rib. The pallet according to any one of claims 1 to 4, wherein a tip end portion of the Y-shaped rib is formed thin.

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