JP3961867B2 - 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 outer portion of the end beam exposed to the outside, assuming that the tip of the fork is abutted.
[0002]
[Prior art]
Conventionally, as this kind of pallet, a synthetic resin pallet disclosed in JP-A-8-133285 is known. This pallet has a fork insertion port on two side surfaces, and is configured so that the fork can be inserted from two directions. Furthermore, side plates of end girders located at both ends of a plurality of girders arranged along the fork inserting direction are formed on two side surfaces in a direction orthogonal to the two side surfaces on which the fork insertion port is formed. Has been. 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 the same side plate portion. These reinforcing ribs are provided over the entire height of the end beam and over 1/10 or more of the width of the end beam.
[0003]
Furthermore, the front end of the reinforcing rib is joined to a connecting rib extending in a direction orthogonal to the reinforcing rib. In this synthetic resin pallet, the side plate portion is reinforced by the reinforcing rib, so that the tip of the fork abuts against the outer surface of the side plate portion so that the pallet can be smoothly rotated or moved. Therefore, operability is improved. Further, as a modified example of the synthetic resin pallet, in addition to a reinforcing rib connected at right angles to the side plate portion, a pair of reinforcing ribs connected to the side plate portion at an angle of substantially 45 ° is provided at the same time. Is also disclosed.
[0004]
[Problems to be solved by the invention]
However, in the conventional synthetic resin pallet, since the reinforcing rib extends only from the side plate portion to the center portion of the end beam, impact due to the butting of the tip of the fork is mainly provided at the upper and lower ends of the end beam. It was configured to be received on the inner side of the upper and lower deck boards. Furthermore, the connecting rib joined to the tip of the reinforcing rib extends in a direction orthogonal to the reinforcing rib, and is not configured to be oriented in the direction in which the impact is transmitted. For this reason, the shock 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 is almost expected to be transmitted to other reinforcing structures in a distributed manner. could not. For this reason, when a strong impact was locally applied from the tip of the fork to the side plate portion, there was a high possibility that local deformation or damage would occur on the deck board located in the vicinity of the impact point. .
[0005]
Furthermore, in the synthetic resin pallet as the conventional modified example, the reinforcing rib extending in the oblique direction hardly coincides with the impact direction applied to the impact point. If they coincide, the fork tip tends to slide on the surface of the side plate. For this reason, most of the impact is transmitted to the reinforcing ribs extending in the orthogonal direction to the side plate portion, and it can hardly be expected to be transmitted and received while being distributed to other reinforcing structures as described above. .
[0006]
The present invention has been made paying attention to such problems existing in the prior art. The purpose is to provide a pallet that is designed to reduce the weight, increase the strength of the outer wall of the exposed end beam, and effectively prevent damage caused by the fork hitting. There is to do.
[0007]
[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 in parallel with the side edge, a flat Y-shape is formed on the outer wall of the end girder facing the fork inserting hole. A Y-shaped rib formed on the Y-shaped rib is protruded, a base end portion of the Y-shaped rib extends in a direction perpendicular to the outer wall of the end beam, and a tip of the Y-shaped rib is extended to the Y-shaped rib. It extends in parallel with the base end portion of the steel frame and is joined to a reinforcing rib joined to the outer wall or inner wall of the end beam.
[0008]
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 a 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 outer wall of the end spar facing the fork insertion hole, and the Y A base end portion of the letter-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 part of the Y-shaped rib and the outer wall of the end girder Or it is made to join with the reinforcement rib joined to the inner wall.
[0009]
The invention of the pallet according to claim 3 is characterized in that, in the invention according to claim 1 or claim 2, the entire Y-shaped rib is configured to connect the upper and lower ends of the pallet. is there.
[0010]
The invention of the pallet according to claim 4 is the invention according to claim 3, wherein the reinforcing rib is joined to the outer wall of the end beam and the reinforcing rib is formed so as to connect the upper and lower ends of the pallet. In addition, a reinforcing partition column is erected on the outer side of the end beam by the reinforcing rib, the outer wall of the end beam, and the Y-shaped rib.
[0011]
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.
[0012]
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.
[0013]
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.
[0014]
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. .
[0015]
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. .
[0016]
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.
[0017]
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 central 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 to be the height up to the upper or upper end portion of the upper girder member 31. 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 ends of the upper girder member 31 as a whole, and partitions the girder member 31. Further, between the short ribs 35 and the partition plate 36, an external short rib 37 and an internal short hand 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.
[0018]
As shown in FIG. 1A and FIG. 6, between the short rib 35 and the partition plate 36, the inner side of the pallet 11 from the inner side surface of the outer wall 33 a of the upper cylinder 33 constituting both sides of the pallet 11. A Y-shaped rib 41 projecting in the direction is provided. The Y-shaped rib 41 includes a long square plate-like base plate 41a extending from the inner side surface of the outer wall 33a of the upper cylindrical body 33, and a pair of branch plates extending while branching obliquely from the leading edge of the base plate 41a. It is formed in the bottom Y-shape from 41b.
[0019]
The base plate 41a located at the base end portion of the Y-shaped rib 41 protrudes from the inner side surface of the outer wall 33a of the upper cylindrical body 33 so as to extend in a direction orthogonal to the side wall 33a, and the base plate 41a. 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.
[0020]
The pair of branch plates 41b located at the tip of the Y-shaped rib 41 is between the tip edge of the base plate 41a and one side surface of the short rib 35 or the partition plate 36 located near the long rib 34. Are extended so as to connect in an oblique direction. 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.
[0021]
On the other hand, on the outer side of the upper girder member 31 located on both sides of the pallet 11, the Y-shaped rib 41, the outer wall 33a of the upper cylindrical body 33 in contact with the Y-shaped rib 41, and the short rib 35 and the partition plate 36 (outer end portion) form a pair of adjacent reinforcing partition columns 42 formed in a substantially B-shaped bottom surface. The reinforcing partitioning column 42 is erected so as to form a columnar structure extending in the vertical direction on the outer side of the upper girder member 31, 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 while being adjacent to each other are formed in a substantially B-shaped plane cross section while sharing the base plate 41a, and further against the load applied in the vertical and lateral directions. Has a high reinforcing effect.
[0022]
The Y-shaped rib 41 located at the center of the pair of reinforcing partitioning columns 42 reinforces the fork (tip portion) against the outer wall 33a of the upper cylindrical body 33 constituting the outer portion of the pallet 11. Provided to do. 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. The impact is distributed evenly when the fork is abutted.
[0023]
Further, the distance between the adjacent short ribs 35 and the partition plate 36 is preferably equal to or less than the lateral width of the fork (about 100 to 150 mm), more preferably, in order to receive the impact at the time of butting the fork without leakage. It is good that it is 100 mm or less. For the same reason, the distance between the base plates 41a of the adjacent Y-shaped ribs 41 is preferably not more than the lateral width of the fork (about 100 to 150 mm), more preferably not more than 100 mm. Further, in each Y-shaped rib 41, the shortest distance between the tips of the pair of branch plates 41b is preferably 100 mm or less.
[0024]
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 is difficult to effectively receive a large impact by the branch plate 41b. There is a fear. On the other hand, if it exceeds 95%, the pallet 11 may not be sufficiently lightened.
[0025]
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 are the same including the outer wall 33a and the inner wall 33b. The name shall be used.
[0026]
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.
[0027]
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 lifted and transported.
[0028]
Now, when the tip of the fork is intentionally or unintentionally abutted against one side of the pallet 11, first, a local impact is applied to the outer surface of the outer wall 33a of the upper and lower cylinders 33, 43. The side wall 33a is slightly pressed and deformed toward the inner side of the pallet 11. The deformation is used for the sake of convenience to explain the propagation path of the shock, and is a deformation that is almost invisible to the naked eye. It is reversible. The slight reversible deformation due to the impact is transmitted to the base plate 41 a of the short rib 35, the partition plate 36, the external short rib 37, or the Y-shaped rib 41 located near the impact point.
[0029]
When most of the slight reversible deformation caused by the impact is transmitted to the short rib 35, the fine reversible deformation is sequentially propagated to the short rib 35 from the base end portion toward the central portion, Is transmitted to the upper deck 15 and the lower deck and attenuated. Further, the fine reversible deformation is further damped while slightly pulling one branch plate 41b joined to the short rib 35 toward the inside of the pallet 11. In addition, the ultra-fine reversible deformation transmitted to the branch plate 41 b is transmitted to the base plate 41 a of the Y-shaped rib 41 and the outer wall 33 a of the cylindrical bodies 33 and 43 and further attenuated. Moreover, the ultra-fine reversible deformation that has passed through the joint with the branch plate 41b is a huge structure (an area wider than the longitudinal ribs 34) that is finally susceptible to impact and deformation. , 43 are received by the inner side wall 33b and then disappeared while being dispersed throughout the end beam 21. The same applies when most of the reversible deformation caused by the impact is transmitted to the partition plate 36.
[0030]
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, the fine reversible deformation is propagated to the base plate 41a sequentially from the base end portion to the tip end portion. However, a part is transmitted to the upper deck 15 and the lower deck and attenuated. Furthermore, the fine reversible deformation is further attenuated while branching from the tip of the base plate 41a and being transmitted to the left and right branch plates 41b. In addition, the ultra-fine reversible deformation transmitted to the two branch plates 41b causes the short ribs 35 and the central portions of the partition plates 36 joined to the tips of the respective branch plates 41b to move toward the inside of the pallet 11. It is further damped while pulling slightly. In addition, the ultra-fine reversible deformation transmitted to the short ribs 35 and the partition plate 36 is distributed to the entire end beam 21 after being transmitted to the outer wall 33a and the inner wall 33b of the cylinders 33 and 43. Disappears.
[0031]
In particular, when the impact is applied to the reinforcing partitioning column 42, in addition to the reinforcing structure centered on the short rib 35, the partition plate 36 or the base plate 41a, the entire reinforcing partitioning column 42 is the same. A joint reinforcing effect with the upper surface deck 15 and the lower surface deck positioned above and below the partitioning column 42 is exhibited. Further, the reinforcing effect by the upper surface deck 15 and the lower surface deck is not limited to the upper and lower ends of the reinforcing partition column 42, but from the base end side of the Y-shaped rib 41 to the tip end side, and further to the extension line thereof. It also includes elements that can be received while being spread over a large area. In particular, when the impact point substantially coincides with the base end portion of the base plate 41a, a pair of extension lines extending in a substantially V-shaped plane from the base end side of the Y-shaped rib 41 to both tip end sides. The deck area for spreading along the way and catching the impact can be further expanded. 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 °.
[0032]
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 planar Y shape on the outer wall 33 a of the end beam 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 beam 21, and the tip of the branch plate 41b of the Y-shaped rib 41 has a pair of reinforcing ribs ( It is joined to the short rib 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 33b of the end girder 21 formed in a long rectangular tube shape (one of the end girders 21). Long side wall).
[0033]
For this reason, the pallet 11 is provided with the Y-shaped rib 41 on the outer side of the end beam 21, so that the strength of the outer wall 33a of the end beam 21 exposed to the outside can be easily increased. Therefore, irreversible deformation and breakage of the side of the pallet 11 due to the abutment can be easily prevented. 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.
[0034]
In particular, since the base plate 41a of the Y-shaped rib 41 is extended so as to coincide with the direction of propagation of the impact at the time of fork butting, the oblique 45 ° direction in the modified example of the conventional synthetic resin pallet Compared with the reinforcing ribs connected to, the impact can be received very effectively, and the reinforcing effect is remarkably high.
[0035]
Further, the impact propagated to the base plate 41a is efficiently transmitted to the entire end beam 21 while branching in two opposite directions by the 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 to the inner side of the pallet 11 and the front and rear ends by a pair of branch plates 41b. 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 dispersed and received while diffusing to the inner side of the pallet 11 and the front and rear ends. Further, irreversible deformation and breakage of the side of the pallet 11 due to the fork butting can be more easily suppressed.
[0036]
In addition, the impact (vector) propagated to each of the branch plates 41b is directly transmitted to the cylinders 33 and 43 via the short ribs 35 and the partition plate 36. Less likely to cause reversible deformation or breakage. 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 impact is remarkably high.
[0037]
Since the short rib 35 and the partition plate 36 are joined to the inner wall 33b of the end beam 21 in contact with the fork insertion hole 12, it is propagated from the outer wall 33a of the end beam 21 through the Y-shaped rib 41. Can be transmitted to the inner wall 33b (entire) facing the impact point. For this reason, since the local impact is not applied to the inner side wall 33b, the force for receiving the impact is remarkably stronger than the outer side wall 33a located in the vicinity of the impact point. Further, since the inner wall 33b can receive a weak impact distributed through the Y-shaped rib 41 over a wide area, the reversible deformation and breakage of the end beam 21 due to the fork butting are extremely remarkably suppressed. Can do.
[0038]
Further, since the short rib 35 and the partition plate 36 are simultaneously joined to the outer wall 33a of the end beam 21, the pallet 11 has an outer wall in addition to the reinforcing effect by the inner wall 33b of the end beam 21. The reinforcement effect by 33a is also demonstrated simultaneously. Since the reinforcing effect by these side walls 33a and 33b is due to the huge structure consisting of the entire lateral direction of the end beam 21, it can be synergistically enhanced as an effect of receiving the impact.
[0039]
-By constructing the entire Y-shaped rib 41 so as to continuously connect the upper and lower ends of the pallet 11 (end girder 21) in the vertical direction, the entire upper and lower deck members 13 and 14 can receive impact integrally. Accordingly, the strength of the outer wall 33a of the end beam 21 exposed to the outside can be remarkably increased. That is, since an impact is simultaneously applied to the upper surface deck 15 and the lower surface deck positioned above and below the Y-shaped rib 41, a remarkably high reinforcing effect can be exhibited as compared with the case where it is applied to only one of them.
[0040]
In this pallet 11, a reinforcing partition column 42 is erected on the outer side of the end beam 21 by the short rib 35 or the partition plate 36, the outer wall 33 a of the end beam 21, and the Y-shaped rib 41 (half). Has been. Therefore, the strength of the outer wall 33a of the end beam 21 exposed to the outside can be remarkably increased by the reinforcing partitioning column 42 formed in the substantially square tube shape. Further, a pair of reinforcing partition columns 42 adjacent to the outer side of the end beam 21 are erected by the short ribs 35, the partition plate 36, the outer wall 33a of the end beam 21 and the Y-shaped rib 41 (whole). Further, the strength of the outer wall 33a of the end beam 21 exposed to the outside can be remarkably increased.
[0041]
-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.
[0042]
-By configuring the entire partition plate 36 so as to continuously connect the upper and lower ends of the pallet 11 up and down, it is possible to very effectively receive the impact propagated through the Y-shaped rib 41. .
[0043]
-By making the distance between a pair of opposing tips of the Y-shaped rib 41 (branch plate 41b) 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 41b. 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.
[0044]
The Y-shaped rib 41 of the pallet 11 is configured such 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 toward the front and rear ends of the pallet 11 becomes larger than the vector of the impact force transmitted inward of the pallet 11. The short rib 35 or the partition plate 36 tends to cause a reversible deformation in the front and rear end direction of the pallet 11. On the other hand, when the angle α is less than 60 °, the impact attenuation effect due to the diffusion into the substantially plane V shape is not sufficiently exhibited.
[0045]
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. For this reason, the vector of the impact force propagated to each branch plate 41b is branched to the inner side of the pallet 11 and the front end portion or the rear end portion side, and the impact force vector branched in the front-rear direction is the longitudinal rib. Therefore, the strength of the pallet 11 can be easily increased.
[0046]
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.
[0047]
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.
[0048]
On the other hand, the pallet 11 of single-sided 4-way insertion, double-sided 4-way insertion, and skid type 4-way insertion 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, on the inner side surface of the outer wall 33a provided along the outer peripheral edge of the pallet 11 in the end girder (corner girder or intermediate girder), a Y-shaped rib 41 having the same configuration as in the above embodiment is provided. Projected. In addition, the tip of the branch plate 41b of the Y-shaped rib 41 has a pair of reinforcing ribs (short ribs 35 and partition walls) extending in parallel with the base plate 41a and joined to the outer wall 33a or inner wall 33b of the end beam. The same structure as that of the plate 36).
[0049]
-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.
[0050]
• 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 outer side of the pallet 11 with respect to the center (longitudinal rib 34) of the end beam 21 are connected to the upper (upper end) and lower portion (lower end) ) Only.
[0051]
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.
[0052]
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.
[0053]
-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.
[0054]
A reinforcing rib (short rib 35 or partition plate 36) is provided only on the inner side of the pallet 11 from the center (longitudinal rib 34) of the end beam 21. Further, a reinforcing rib (short rib 35 or partition plate 36) may be provided only on the outer side of the pallet 11 with respect to the center (longitudinal rib 34) of the end beam 21.
[0055]
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 reinforcing rib is joined to an inner wall of an end girder in contact with the fork insertion hole.
[0056]
The pallet according to any one of claims 1 to 5, wherein the entire reinforcing rib is configured to connect the upper and lower ends of the pallet.
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.
[0057]
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.
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 1 to 5.
[0058]
・ 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 outer wall of the end beam facing the fork insertion hole, and the base end portion of the Y-shaped rib is connected to the outer wall of the end beam Extending in the orthogonal direction, extending the tip of the Y-shaped rib in parallel with the base end of the Y-shaped rib and joining the reinforcing rib joined to the outer wall or inner wall of the end beam A featured pallet. When comprised in this way, the intensity | strength of the outer side wall of the end beam exposed outside can be heightened, aiming at weight reduction, and the damage by the fork butting can be prevented effectively.
[0059]
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 planar Y shape is projected on the outer wall of the end beam facing the hole, and the base end of the Y-shaped rib extends in a direction perpendicular to the outer wall of the end beam. The pallet is characterized in that the tip end of the Y-shaped rib extends in parallel with the base end portion of the Y-shaped rib and is joined to a reinforcing rib joined to the outer wall or inner wall of the end beam. When comprised in this way, the intensity | strength of the outer side wall of the end beam exposed outside can be heightened, aiming at weight reduction, and the damage by the fork butting can be prevented effectively.
[0060]
【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 any one of claims 1 to 5, while reducing the weight, the strength of the outer wall of the end beam exposed to the outside is increased, and the damage due to the butting of the fork is effectively prevented. Can do.
[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 ... Outer 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 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,
Protruding a Y-shaped rib formed in a flat Y-shape on the outer wall of the end beam facing the fork insertion hole,
The base end of the Y-shaped rib extends in a direction orthogonal to the outer wall of the end beam,
A pallet characterized in that 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 outer wall or inner wall of the end beam. 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,
Protruding a Y-shaped rib formed in a flat Y-shape on the outer wall of the end beam facing the fork insertion hole,
The base end of the Y-shaped rib extends in a direction orthogonal to the outer wall of the end beam,
A pallet characterized in that 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 outer wall or inner wall of the end beam. The pallet according to claim 1 or 2, wherein the entire Y-shaped rib is configured to connect the upper and lower ends of the pallet. The reinforcing rib is joined to the outer wall of the end beam, and the reinforcing rib is 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 outer side of the end beam by the reinforcing rib, the outer 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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