JP2000255569A - Pallet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pallet with which an item placed on the pallet can be transported with or without the pallet depending on a purpose, and which is strengthened while made lighter. SOLUTION: A pallet 11 is formed integrally with synthetic resin, and is provided with a plurality of bottom sash bars 12 crosswise and above them with a plurality of top sash bars 13 lengthwise. A beam 14 between the top and bottom sash bars 12, 13 connects the same. A fork insertion hole is formed by each sash bar 12, 13 and beam 14. The top wall 14b and the bottom wall of the beam 14 are provided with an upward recess 15 and a downward recess vertically alternatively. On the end edge facing the upward recess 15 from the top wall 14b of the beam 14, a top reinforcing rib 18 is extended downward, and the reinforcing rib 18 is formed in a flat triangular shape at the corner and the center of the pallet 11 and in a flat rectangular shape in other parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pallet used for transporting a load such as a roof tile using a forklift. More specifically, the present invention relates to a pallet capable of carrying a load placed on a pallet together with the pallet on a fork of a forklift and carrying only the load on a fork.

[0002]

2. Description of the Related Art Conventionally, this type of pallet has been
A double-sided pallet disclosed in Japanese Utility Model Publication No. 47-41793 is known. In this pallet, an appropriate number of back deck boards are arranged vertically at predetermined intervals, and above the pallets, an appropriate number of front deck boards are arranged laterally at predetermined intervals. A pedestal consisting of a square pipe is provided between the intersections of the two deck boards. Further, a pair of fittings which are fitted at different angles of 90 ° are interposed above and below the pillars to hold both the front and rear deck boards, and to penetrate the intersection of the two deck boards. The screw is tightened by the screw.

[0003] Therefore, this double-sided pallet is constructed such that both sides are symmetrical. Furthermore, when the fork of the forklift is inserted in the vertical direction, the pallet can be transported along with the pallet with the load on the pallet loaded.In addition, when the fork of the forklift is inserted in the horizontal direction Can carry only the load on the pallet.

[0004]

However, in the conventional double-sided pallet, the deck board is made of wood, and the pillars and fittings are made of metal. While the height of the pallet can be increased, the weight of the pallet becomes heavy, and it is very difficult to further reduce the weight.

The present invention has been made by paying attention to such problems existing in the prior art. According to the purpose, the load on the pallet can be transported for each pallet or only the load can be transported in accordance with the purpose of use, and the weight can be reduced while increasing the strength. Provide pallets.

[0006]

According to a first aspect of the present invention, there is provided a pallet comprising a plurality of long plate-like bars arranged at a predetermined interval in a vertical direction, Arrange a plurality of bars in the horizontal direction at a predetermined interval above
The upper and lower crosspieces are connected by a girder,
A space between the girders is a fork insertion hole into which a fork of a forklift is inserted, and the crosspiece and the girders are integrally formed, and upper and lower walls of the girders are provided with recesses alternately up and down, and an upper wall of the girders And a reinforcing rib formed on an edge facing the recess from the bottom wall.

According to a second aspect of the present invention, there is provided the pallet according to the first aspect, wherein the reinforcing ribs are formed obliquely at corners. According to a third aspect of the present invention, in the pallet according to the first or second aspect, the reinforcing ribs are formed at both ends of each bar in a vertical or horizontal direction.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1, the pallet 11 is integrally formed of a synthetic resin, and is formed so that upper and lower surfaces thereof are substantially symmetric. FIG.
As shown in FIG. 2, the four lower rails 12 are each formed in a rectangular plate shape, and are provided so as to extend in parallel at a predetermined interval. Further, the four upper bars 13 are formed in a rectangular plate shape like the lower bar 12, and are provided above the lower bar 12 so as to extend in a direction orthogonal to the lower bar 12 at a predetermined interval. .

As shown in FIGS. 1, 3 (a) and 3 (b), the spar 14 is formed in the shape of a square tube and is formed so as to connect the lower beam 12 and the upper beam 13 in the vertical direction. Each of these bars 12 and 13 forms a bottom wall 14a and an upper wall 14b of the girder 14. Further, the outer peripheral surface of each spar 14 is chamfered.

An upward recess 15 provided on an upper wall 14b of a spar 14 located at a corner portion and a central portion of the pallet 11
Are formed by perforating the upper wall 14b of each spar 14 in a planar triangular shape. In addition, the upward recess 15 provided on the upper wall 14b of the other spar 14 is formed by piercing the upper wall 14b of each spar 14 into a planar rectangular shape.

Similarly, the downward recess 16 provided on the bottom wall 14a of the spar 14 located at the corner and the center of the pallet 11 is formed by drilling the bottom wall 14a of each spar 14 in a triangular plane. Is formed. In addition, digit 1 other than the above
4 is provided on the bottom wall 14a.
4 is formed by piercing the bottom wall 14a into a flat rectangular shape. Further, the upward recesses 15 formed in the upper rail 13 and the downward recesses 16 formed in the lower rail 12 are formed so as to be staggered in the vertical direction.

As shown in FIGS. 4B and 4C, the digit 1
The upper reinforcing rib 18 hanging from the edge facing the upward recess 15 of the upper wall 14b of the fourth 4 is formed in a rectangular plate shape. The lower reinforcing ribs 19 are formed in a rectangular plate shape like the upper reinforcing ribs 18 and the bottom wall 1 of the spar 14 is formed.
4a is vertically provided from the edge facing the downward recess 16.
The upper reinforcing rib 18 and the lower reinforcing rib 19
The upper wall 14b, the bottom wall 14a, and the spar 14
It can maintain its own strength.
Further, as shown by a two-dot chain line in FIGS. 4B and 4C, the outer surface of the upper reinforcing rib 18 located above is positioned perpendicular to the outer surface of the lower reinforcing rib 19 located below it. are doing.

As shown in FIG. 1 and FIG. 4 (c), the drain hole 20 is formed by forming a circular hole substantially at the center of the upper wall 14b and the bottom wall 14a of the spar 14, and the upward recess 15 is formed.
Alternatively, it is possible to prevent rainwater or the like from accumulating in the downward recess 16.

The upper bar 13 and the lower bar 12 are provided with a large number of rectangular holes 21 extending in the length direction of the bars 12, 13 and formed in rows and columns.
Furthermore, these long holes 21
It is formed between the girders 14.

Side ribs 22 provided along both widthwise edges of the upper beam 13 and the lower beam 12 project downwardly or upwardly in a rectangular plate shape. Can be held.

The locking ribs 23 suspended from the lower surface of the upper beam 13 and the upper surface of the lower beam 12 are formed in a rectangular plate shape, and the length direction thereof is in the length direction of each of the bars 12 and 13. Extending. Furthermore, both ends in the length direction of the locking rib 23 are connected to the outer peripheral surface of the girder 14 so that the strength of each of the bars 12 and 13 can be maintained. In addition, as shown in FIG. 4A, the height of the locking rib 23 is formed higher than the height of the side rib 22.

As shown in FIGS. 1 and 4 (a), the engaging ribs 24 suspended from the lower surface of the upper beam 13 and the upper surface of the lower beam 12 are formed in a substantially rectangular plate shape. The length direction extends in the width direction of each of the bars 12 and 13. Further, the engaging ribs 24 extend so as to be orthogonal to the plurality of locking ribs 23, and both ends thereof are integrated with the locking ribs 23 and the side ribs 22, so that the strength of the bars 12, 13 is maintained high. You can do it.

An engaging rib 24 connected to the side rib 22
The upper end surface or the lower end surface is cut in an oblique direction to form an inclined surface 25, and the inclined surface 25 linearly connects the locking rib 23 and the side rib 22 located at both ends. I have.

Next, a method of manufacturing the pallet 11 will be described. The pallet 11 configured as described above is
It is manufactured by integrally molding by an injection molding method. That is, although not shown, the mold for injection molding is composed of an upper mold and a lower mold, and can be closed and opened in the vertical direction. A cavity in the shape of the pallet 11 is formed on a mold splitting surface (PL surface) between the upper die and the lower die.

The upward recess 15 of the spar 14 is formed by an upper mold, and the downward recess 16 is formed by a lower mold. In this case, the upper reinforcing rib 18 and the lower reinforcing rib 19
Is provided at a position that does not overlap in the vertical direction, so that the upper and lower dies are closed and opened in the vertical direction, so that the peripheral wall of the spar 14, the upper wall 14b and the upper reinforcing ribs 18,
In addition, the bottom wall 14a and the lower reinforcing rib 19 of the spar 14 can be formed simultaneously.

Then, the upper mold is set at 2500-3 with respect to the lower mold.
In a state where the mold is clamped at a pressure of about 000 tons, the synthetic resin melted by heating is injected into the cavity, and then cooled and opened to form the target pallet 11.

Next, the pallet 1 constructed as described above
The method of using No. 1 will be described. As shown in FIG. 5A, the load 31 indicated by a two-dot chain line placed on the upper rail 13 of the pallet 11 is placed on the pallet 11 and two forks 32 are provided for each pallet 11. When transported by a forklift equipped with a forklift, the transport is performed as follows.

First, a pair of forks 32 of a forklift are inserted in parallel into the fork insertion holes 26 located at both ends of the three fork insertion holes 26 surrounded by the upper crosspiece 13 and the two girders 14 adjacent thereto. At the same time, the fork 32 is disposed so as to pass through the fork insertion hole 26. Next, the forklift fork 32
Is lifted upward, and the engaging surface 27 formed by the locking rib 23 and the engaging rib 24 of the pallet 11 is brought into contact with the upper surface of the fork 32. By further lifting the fork 32, the pallet 11 is lifted with the engagement surface 27 placed on the upper surface of the fork 32, and can be transported by a forklift.

As shown in FIG. 5 (b), the load 31 indicated by a two-dot chain line placed on the upper rail 13 of the pallet 11 When transporting with a forklift equipped with three forks 32, the three forks 32 of the forklift can be inserted in parallel into the three fork insertion holes 26 and transported in the same manner as described above.

As shown in FIG. 6 (a), the load 3 indicated by a two-dot chain line is placed on the upper rail 13 of the pallet 11.
When only 1 is carried by a forklift equipped with two forks 32, it is carried as follows.

First, a pair of forks 32 of a forklift are placed in parallel between the load 31 and the fork insertion holes 26 located at both ends of the three fork insertion holes 26 located at the top of the pallet 11. At the same time, the fork 32 is arranged so as to pass through the fork insertion hole 26. Next, the fork 32 of the forklift is lifted upward, and the upper surface thereof is brought into contact with the lower surface of the load 31.
By further lifting the fork 32, the load 3
1 is lifted while being supported on the upper surface of the fork 32, and can be carried by a forklift.

As shown in FIG. 6 (b), only the load 31 indicated by the two-dot chain line placed on the upper rail 13 of the pallet 11 is carried by a forklift equipped with three forks 32. In this case, three forks 32 of a forklift can be inserted in parallel into the three fork insertion holes 26 and transported in the same manner as described above.

When the load 31 placed on the upper surface of the fork 32 of the forklift is to be loaded on the pallet 11, the lower surface of the fork 32 is aligned with the fork insertion hole 26 on the upper surface of the pallet 11. 32, the fork 32 is inserted into the fork insertion hole 26.
Insert inside. Then, the upper surface of the fork 32 and the load 3
After confirming that the lower surface of the fork 3 is separated from the fork 3,
2 is pulled out of the fork insertion hole 26 in parallel.

Since the pallet 11 is formed so that the upper and lower surfaces are substantially symmetrical, the pallet 11
Can be used in the same manner even if they are arranged upside down. Next, effects exerted by the above embodiment will be described.

The pallet 11 is provided such that a plurality of lower rails 12 extend in parallel at a predetermined interval, and a plurality of upper rails 13 are provided above the lower rail 12 at a predetermined interval.
It is provided so as to extend in a direction orthogonal to the vertical direction, and is formed so as to be vertically connected by a girder 14 between the lower beam 12 and the upper beam 13. For this reason, both the upper surface and the lower surface of the pallet 11
Since 6 is formed, the load 31 on the pallet 11 can be transported for each pallet 11 or only the load 31 can be transported according to the purpose of use.

In forming the pallet 11 of the present invention, since means for forming the pallet 11 without using a special slide core or the like is used, it is possible to reduce the cost of the mold. Therefore, the pallet 11 can be manufactured at low cost by integral molding.

Since the spar 14 of the pallet 11 is formed in the shape of a square tube, the strength of the spar 14 can be maintained and the weight can be significantly reduced. Furthermore, since the upper wall 14b and the bottom wall 14a are provided alternately on each girder 14, the strength of the girder 14 can be maintained high.

The pallet 11 has a triangular upward recess 15 and a downward recess 16 on the upper wall 14b and the bottom wall 14a of the spar 14 located at the corners and the center of the pallet 11, and is located at other positions. An upward recess 15 and a downward recess 16 are provided on the upper wall 14b and the bottom wall 14a of the spar 14, and the upward recess 1 provided in each spar 14 is provided.
5 and the downward recess 16 are formed alternately up and down. Therefore, the strength of the pallet 11 can be kept high against external forces applied to the pallet 11 from various directions.

An upward recess 15 of the upper wall 14b of the spar 14
The upper reinforcing ribs 18 and the lower reinforcing ribs 19 are suspended from the edges facing the downwardly facing recesses 16 and the bottom wall 14a of the spar 14, so that the upper wall 14b, the bottom wall 14a, and the spar 14 of the spar 14 are provided. The strength of itself can be further increased.

The outer surface of the pallet 11 is formed by the outer surfaces of the upper beam 12, the lower beam 13 and the spar 14, and the forklift of the forklift is mounted on the outer surface of the pallet 11 because members such as protrusions that can be easily hooked do not protrude. 32 can be prevented from being hooked, and the pallet 11 can be easily handled. Further, since the outer peripheral surface of the spar 14 is chamfered, the fork 32 of the forklift can be hardly hooked on the outer peripheral surface of the spar 14 constituting the fork insertion hole 26 of the pallet 11,
Pallet handling can be further facilitated. Further, since the outer surface of the pallet 11 has a rounded shape, even when the load 31 or the like comes into contact with the pallet 11, it is possible to prevent the pallet 11 from being locally damaged.

An engagement surface 27 composed of a locking rib 23 and an engagement rib 24 is formed on the lower surface of the upper beam 13 and the upper surface of the lower beam 12, and the fork 32 of the forklift is engaged with the engagement surface 27. It is configured so that they can be combined. For this reason, the locking ribs 23 and the engaging ribs 24 formed in a mesh shape in the vertical and horizontal directions reduce the weight,
The strength of the upper beam 13 and the lower beam 12 is increased, and the pallet 11
And the load by the load 31 can be reliably supported, and the forklift fork 32 and the engagement surface 2
7 can be prevented from slipping.

Since the plurality of long holes 21 are formed in the upper beam 13 and the lower beam 12, the strength of the pallet 11 can be maintained and the weight can be reduced. Further, since the side ribs 22, the locking ribs 23, and the engaging ribs 24 are provided vertically along the periphery of the long hole 21, the strength of each of the bars 12, 13 can be further increased.

Since the upper and lower surfaces of the pallet 11 are formed so as to be substantially symmetrical, the pallet 11 can be used by being arranged upside down.
Even when the pallet 11 is lost, the pallet 11 can be used for a longer period of time by arranging it upside down and using the engagement surface 27 of the lower bar 12.

Since the height of the side ribs 22 of the pallet 11 is formed lower than the locking ribs 23 and the inclined surfaces 25 are formed on the engagement ribs 24, the fork 32 of the forklift and the side ribs 22 are formed. The fork 32 can be easily inserted into the fork insertion hole 26.

Since the load 31 and at least one of the pallets 11 can be transported by using a forklift having three forks 32, the load 31
And at least one lower surface or engagement surface 2 of pallet 11
7 can be dispersed. For this reason, the heavier load 31 can be transported, and the load 31 or the pallet 11 can be prevented from being damaged during the transport.

The present embodiment can be embodied with the following modifications. In the pallet 11 of the embodiment, the number of the upper rails 13 is set to two, three or five or more, and the lower rails 1
The number of 2 must be 2, 3, or 5 or more.

Even in the case of such a configuration, substantially the same effects as in the above embodiment can be exerted. Further, when the number of the bars 12 and 13 is two or three, the configuration of the pallet 11 can be simplified.

Conversely, when the number of the bars 12 and 13 is five or more, the strength of the pallet 11 can be increased, and the load can be increased by using a forklift having four or more forks 32. Since it is possible to carry at least one of the pallet 31 and the pallet 11, it is possible to carry the heavier load 31 and to prevent the load 31 or the pallet 11 from being damaged during the transportation. it can. Further, since the pallet 11 can be made even larger, a larger load 3
1 can be transported.

In the pallet 11 of the embodiment, the upward recesses 15 and the downward recesses 16 do not need to be limited to the configuration of the above-described embodiment. For example, the upward recesses formed in the center spar 14 15 may be formed in a planar rectangular shape. Further, the upward recesses 15 and the downward recesses 16 formed in all the beams 14 may be formed in a planar triangular shape or a planar rectangular shape.

In the pallet 11 of the embodiment, the upward recesses 15 and the downward recesses 16 do not need to be limited to the configuration of the above-described embodiment shown in FIG. The upward recess 15 having a flat rectangular shape may be formed so that its length direction extends in the width direction of the upper crosspiece 13. Similarly, pallet 1
The upward recess 15 having a plane triangular shape formed at one corner may be formed at a position rotated clockwise or counterclockwise by 90 ° from the state shown in FIG.

In the pallet 11 of the embodiment, the elongated holes 21 are formed in the upper wall 14 b and the bottom wall 14 a of the spar 14, and the locking ribs 23 and 24 are projected along the periphery of the elongated hole 21. To set up.

With this structure, the strength of the upper and lower bars 13 and 12 can be increased, and the weight of the pallet 11 can be reduced. Furthermore, when the pallet 11 is used outdoors, the upward recess 15
Alternatively, it is possible to prevent rainwater or the like from accumulating in the downward recess 16.

In the pallet 11 of the embodiment, at least the upper reinforcing ribs 18, the lower reinforcing ribs 19, the drain holes 20, the long holes 21, the side ribs 22, the locking ribs 23, the engaging ribs 24, and the inclined surfaces 25. To be formed by omitting one kind.

With such a configuration, substantially the same effects as in the above embodiment can be exhibited, and the configuration of the pallet 11 can be further simplified. In the pallet 11 of the embodiment, the number of at least one of the long holes 21, the locking ribs 23, and the engaging ribs 24 is changed to form an arbitrary number.

Even with such a configuration, it is possible to exhibit substantially the same effects as in the above embodiment, and it is possible to form the pallet 11 corresponding to the weight of the load 31 to be loaded. is there.

In the pallet 11 of the embodiment, the shape of the long holes 21 is not limited to a rectangular shape, and may be, for example, a polygonal shape such as a square shape, a hexagonal shape, an octagonal shape, a circular shape, or an elliptical shape.

In the pallet 11 of the embodiment, the height of the side ribs 22 is the same as the height of the locking ribs 23 and the engaging ribs 24. Further, technical ideas that can be grasped from the embodiment will be described below.

(1) The pallet according to claim 1 or 2, wherein the recess is formed in at least one of a planar triangular shape and a quadrangular shape. In this case, the structure of the pallet can be simplified, and the strength of the pallet can be kept high.

(2) The spar is formed in a cylindrical shape, a plurality of holes are formed in each crosspiece, and a connecting portion between the holes is engaged with a fork of the forklift. A pallet according to any one of claims 1, 2 and (1).

With such a configuration, it is possible to reduce the weight while maintaining the strength of the pallet high. (3) The outer peripheral portion is formed by the upper and lower crosspieces and the girder, and the outer peripheral surface of the girder is chamfered. Palette.

With this configuration, the fork of the forklift can be prevented from being caught on the outer peripheral portion of the pallet and the outer peripheral surface of the girder forming the fork insertion hole, so that the pallet can be handled more easily. can do.

(4) The pallet according to any one of (1), (2) and (1) to (3), wherein both upper and lower surfaces can be used. In such a configuration, handling of the pallet can be facilitated. Furthermore, it can be used for a long time.

[0058]

As described above in detail, according to the present invention, the following effects can be obtained. According to the pallet according to the first aspect of the present invention, the load on the pallet can be transported for each pallet, or only the load can be transported according to the purpose of use. Can be achieved.

According to the pallet of the second aspect, in addition to the effects of the first aspect, the strength of the pallet can be improved. According to the invention of the pallet according to the third aspect, in addition to the effect of the invention according to the first or second aspect, the strength of the pallet can be further improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a pallet according to an embodiment.

FIG. 2 is a plan view showing the pallet of the embodiment.

FIG. 3A is a front view showing a pallet according to the embodiment,
(B) is a side view which shows the pallet of embodiment.

4A is a sectional view showing a pallet taken along line 4a-4a in FIG. 2, FIG. 4B is a sectional view showing a pallet taken along line 4b-4b in FIG. 2, and FIG. 4C is a sectional view taken along line 4c-4c in FIG. Sectional drawing which shows the pallet in a line.

FIGS. 5A and 5B are perspective views showing a state in which the pallet of the embodiment is used.

FIGS. 6A and 6B are perspective views showing a state in which the pallet of the embodiment is used.

[Explanation of symbols]

11: Pallet, 12: Lower beam as a beam, 13: Upper beam as a beam, 14: Girder, 14a: Bottom wall of girder, 14b ...
Upper wall of girder, 15: upward recess as a recess, 16: downward recess as a recess, 18: upper reinforcing rib as a reinforcing rib, 19 ... lower reinforcing rib as a reinforcing rib, 26 ... fork insertion hole , 32 ... Fork of the forklift.

Claims (3)

[Claims] 1. A plurality of long plate-like bars are arranged in a vertical direction at a predetermined interval, and a plurality of bars are arranged in a horizontal direction at a predetermined interval above the bars to be positioned at the top and bottom. The bars are connected by a girder, and the girder is a fork insertion hole into which a fork of a forklift is inserted, and the bars and the girder are integrally formed. A pallet provided with a concave portion and reinforcing ribs formed at edges facing the concave portion from the upper wall and the bottom wall of the spar. 2. The pallet according to claim 1, wherein the reinforcing rib is formed obliquely at a corner. 3. The pallet according to claim 1, wherein the reinforcing ribs are formed at both ends of each bar in a vertical or horizontal direction.