JP4577858B2 - Plastic pallet - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin pallet used for transportation and storage of luggage, and more particularly to a synthetic resin pallet having a rectangular planar shape and capable of four-way insertion.
[0002]
[Prior art]
Conventionally, in a synthetic resin pallet having a rectangular planar shape and capable of four-way insertion, ribs that run substantially parallel to the long side and the short side of the synthetic resin pallet are formed on the back surface of the deck surface, respectively. What is known. The pitch of the ribs that run substantially parallel to the long side of the synthetic resin pallet and the pitch of the ribs that run substantially parallel to the short side are formed at substantially equal pitches. For example, in the case of a synthetic resin pallet having a long side length of 1200 mm and a short side length of 1000 mm, the pitch of ribs running substantially parallel to the long side and the pitch of ribs running substantially parallel to the short side Is about 25-50 mm.
[0003]
[Problems to be solved by the invention]
As shown in FIG. 4, two forks f of a forklift are inserted into a fork insertion port p2 formed on the short side p1 side of a conventional synthetic resin pallet, and a load C is placed thereon. After the synthetic resin pallet is transported, the next synthetic resin pallet may be transported by inserting the fork f into the fork insertion port p4 formed on the long side p3 side. In such a case, the work of widening the interval of the forks f is performed in accordance with the fork insertion port p4 formed on the long side p3 side, but it is erroneously inserted into the fork insertion port p2 formed on the short side p1 side. When the fork f having the gap as it is is inserted into the fork insertion port p4 formed on the long side p3 side, the length X of the portion located outside the fork f of the synthetic resin pallet is increased. 5, the synthetic resin pallet is bent upward as indicated by a two-dot chain line due to the weight of the load C placed on the portion located outside the fork f. There was a problem that the luggage placed on the synthetic resin pallet dropped.
[0004]
In addition, in order to increase the rigidity of the synthetic resin pallet and reduce the amount of bending, it is conceivable to increase the number of ribs formed on the back surface of the deck surface over the entire back surface. While the weight of the pallet increases unnecessarily, the cost of the synthetic resin pallet increases, and there is a problem that the rigidity cannot be increased effectively.
[0005]
An object of the present invention is to solve the problems of the conventional synthetic resin pallet as described above.
[0006]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention has corner girders, intermediate girders, and central girders, and a plurality of inter-girder connecting ribs for connecting the corner girders and the intermediate girders on the bottom surface of the deck board. A plurality of inter-girder orthogonal ribs perpendicular to the inter-girder connecting ribs are provided so as to cross each other. A plurality of orthogonal ribs orthogonal to the inter-girder connecting ribs are provided so as to intersect with each other, and the deck board other than the region located between the corner beam and the intermediate beam and between the intermediate beam and the central beam is provided. The rib pitch of the inter-girder connecting ribs connecting the corner girders and the intermediate girders formed along the long side in a four-sided synthetic resin pallet with rectangular cross-sections with cross ribs on the bottom. And a girder that connects the middle girder and the middle girder formed along the long side The rib pitch of the connecting rib, none, is formed along the short side, it is formed along the rib pitch and short sides of the inter-digit connecting ribs connecting the Sumiketa intermediate girder, an intermediate girder and the central beam It is formed narrower than the rib pitch of the inter-girder connecting ribs to be connected.
[0007]
【Example】
Examples of the present invention will be described below. However, the present invention is not limited to these examples as long as the gist of the present invention is not exceeded.
[0008]
A synthetic resin pallet as an example of the present invention (hereinafter also simply referred to as a pallet).
) Is a synthetic resin, and is formed by welding the upper skid S1 and the lower skid S2, which are integrally molded, at the girder. In this embodiment, the upper skid S1 and the lower skid S2 are formed in the same shape, but are not necessarily formed in the same shape.
[0009]
The upper skid S1 having a rectangular planar shape includes a corner girder 1a 'formed at the four corners, an intermediate girder 1b' formed in the middle of the corner girder 1a ', and a central girder formed at the center. Similarly, the lower skid S2 having a rectangular planar shape has a corner beam portion 1a "formed at the four corners and an intermediate beam portion 1b" formed between the corner beam portions 1a ". And a central girder portion (not shown) formed in the central portion, and the upper skid S1 and the lower skid S2 are each integrally formed of a synthetic resin. End face of corner girder 1a 'of skid S1, end face of intermediate girder 1b' and end face of central girder 1c ', end face of corner girder 1a "of lower skid S2, end face of middle girder 1b" and center girder A pallet is formed by welding the end faces of the portion 1c ′ to each other. . The planar shape of the thus pallet made in is formed in a rectangular shape having an opposite long side A and opposite short sides B.
[0010]
The pallet formed as described above is formed between an upper deck board and a lower deck board, a cylindrical corner beam 1a including corner beams 1a ′ and 1a ″ formed at four corners, and a corner beam 1a. A cylindrical intermediate girder 1b composed of intermediate girder portions 1b ', 1b "and a cylindrical central girder composed of a central girder portion (not shown), and a corner girder 1a and intermediate girder A fork insertion slot h into which a fork of a forklift can be inserted is formed between 1b and the intermediate beam 1b and the central beam, so-called a four-way pallet having two fork insertion ports h on each side surface. Is formed.
[0011]
On the lower surface of the upper deck board located between the corner beam 1a and the intermediate beam 1b, a plurality of inter-girder connection ribs 2 for connecting the corner beam 1a 'and the intermediate beam 1b', and the beam connection rib 2 A plurality of inter-digit orthogonal ribs 3 orthogonal to each other are suspended so as to cross each other. Similarly, a plurality of inter-girder connecting ribs 4 for connecting the intermediate beam portion 1b 'and the central beam portion 1c' to the lower surface of the upper deck board p1 located between the intermediate beam portion 1b 'and the central beam portion 1c'. A plurality of inter-digit orthogonal ribs 5 orthogonal to the inter-digit connecting ribs 4 are provided so as to cross each other. Furthermore, the upper deck board other than the region located between the corner beam portion 1a ′ and the intermediate beam portion 1b ′ and between the intermediate beam portion 1b ′ and the central beam portion 1c ′ (this region is simply referred to as the “outer beam space region” hereinafter). A plurality of cross ribs 6a and 6b that run vertically and horizontally are also suspended from the lower surface of p1.
[0012]
In the present embodiment, among the ribs formed along the long side A, the rib pitch (the distance between the rib centers of adjacent ribs) of the inter-girder connecting ribs connecting the girders is formed along the short side B. Among the ribs, the rib pitch is narrower than the pitch of the inter-girder connecting ribs that connect the girders. More specifically, it is formed along the rib pitch d1 and the long side A of the inter-girder connecting rib 2 that is formed along the long side A and connects the corner beam portion 1a ′ and the intermediate beam portion 1b ′. The rib pitch d2 of the inter-girder connecting rib 4 that connects the intermediate girder part 1b 'and the central girder part 1c' connects the corner girder part 1a 'and the intermediate girder part 1b' formed along the short side B. The rib pitch d3 of the inter-girder connection rib 2 and the rib pitch d4 of the inter-girder connection rib 4 formed along the short side B and connecting the intermediate girder portion 1b 'and the central girder portion 1c' are formed narrower. It should be noted that the rib pitch of the inter-spar orthogonal ribs 3 and 5 orthogonal to the inter-spar connecting ribs 2 and 4 and the rib pitch of the cross ribs 6a and 6b located in the inter-spar outer region are both formed along the long side A. The intermediate girder part 1b 'and the central girder part 1c' formed along the rib pitch d1 and the long side A of the inter-girder connecting rib 2 for connecting the corner girder part 1a 'and the intermediate girder part 1b' are coupled. The inter-girder connecting rib 4 is formed wider than the rib pitch d2.
[0013]
As described above, the intermediate pitch formed along the long side A and the rib pitch d1 of the inter-girder connecting rib 2 connecting the corner beam 1a 'and the intermediate beam 1b' formed along the long side A. Girder connecting the corner girder part 1a 'and the intermediate girder part 1b' formed along the short side B with the rib pitch d2 of the inter-girder connecting rib 4 connecting the girder part 1b 'and the central girder part 1c'. By forming narrower than the rib pitch d4 of the inter-girder connecting rib 4 connecting the intermediate girder portion 1b 'and the central girder portion 1c' formed along the rib pitch d3 and the short side B of the inter-connecting rib 2, the pallet The rigidity in the long side A direction is increased. Therefore, even when the fork f having a gap as it is inserted into the fork insertion port h formed on the short side B side is inserted into the fork insertion port h formed on the long side A side, the pallet is Due to the weight of the load C placed on the portion located outside, the bag is not bent upward and the load placed on the pallet is not dropped.
[0014]
For example, in the case of a synthetic resin pallet having a long side length of 1200 mm and a short side length of 1000 mm, the corner beam portion 1a ′ and the intermediate beam portion 1b ′ formed along the long side A The rib pitch d1 of the inter-girder connecting rib 2 is 15 to 30 mm, and is formed along the long side A. The inter-girder connecting the intermediate girder portion 1b ′ and the central girder portion 1c ′. The rib pitch d2 of the connecting rib 4 is 10 to 20 mm. And the rib pitch d3 of the inter-girder connecting rib 2 formed along the short side B and connecting the corner girder portion 1a 'and the intermediate girder portion 1b' is formed to be 40 to 60 mm. The rib pitch d4 of the inter-girder connecting rib 4 that connects the intermediate girder portion 1b 'and the central girder portion 1c' formed along the same is also formed to be 40 to 60 mm. The rib pitches d5 and d6 of the crossed ribs 6a and 6b are 50 to 70 mm.
[0015]
In the above-described embodiment, the pallet is formed by the upper skid S1 and the lower skid S2 having the same shape and is used on both sides. However, the pallet is along the long side A, which is a feature of the present invention. Among the ribs formed, the rib pitch of the inter-girder connecting ribs connecting the girders is narrower than the rib pitch of the inter-girder connecting ribs connecting the girders among the ribs formed along the short side B. In the case of a single-sided pallet, it should be applied at least to the ribs suspended from the lower surface of the upper deck board, and not necessarily applied to the ribs erected on the upper surface of the lower deck board. Absent.
[0016]
The above-described characteristic configuration of the present invention can be applied to various synthetic resin pallets such as when the width of the fork insertion port is wide, when the height of the fork insertion port is high, or when the deck is thin. it can.
[0017]
【The invention's effect】
Since the present invention has the above-described configuration, the following effects can be achieved.
[0018]
Of the ribs formed along the long side, the rib pitch of the inter-girder connecting rib connecting the girders is made narrower than the rib pitch of the inter-girder connecting rib connecting the girders among the ribs formed along the short side. Thereby, the rigidity of the long side direction of a synthetic resin pallet is improved. Therefore, even when a fork having a gap as it is inserted into the fork insertion port formed on the short side is inserted into the fork insertion port formed on the long side, the synthetic resin pallet remains on the outside of the fork. Due to the weight of the load placed on the position, the bag is not bent upward, and the load placed on the synthetic resin pallet is not dropped.
[0019]
Of the ribs formed along the long side, the rib pitch of the inter-girder connecting ribs connecting the girders is narrowed, effectively suppressing the increase in the weight of the synthetic resin pallet and effectively making the synthetic resin pallet The amount of bending can be reduced by increasing the rigidity of the. Further, the rib pitch can be widened in the direction where the amount of bending is small, and an increase in the weight of the synthetic resin pallet can be further suppressed.
[Brief description of the drawings]
FIG. 1 is a perspective view of a synthetic resin pallet according to the present invention.
FIG. 1 is a rear perspective view of an upper skid constituting the synthetic resin pallet of the present invention.
FIG. 3 is a partial rear perspective view of an upper skid constituting the synthetic resin pallet of the present invention.
FIG. 4 is a plan view of a conventional synthetic resin pallet or the like.
FIG. 5 is a partial front view of a conventional synthetic resin pallet or the like.
[Explanation of symbols]
A ······ Long side B ··· Short side h ······ Fork insertion slot 2, 4, ······ Connection rib 3, 5・ ・ ・ ・ ・ ・ Random cross rib

Claims (1)

There are corner girders, intermediate girders, and central girders. On the bottom surface of the deck board, there are a plurality of inter-digit connecting ribs that connect the corner girders and the intermediate girders, and a plurality of inter-digit orthogonal members that are orthogonal to the inter-girder connecting ribs. Ribbed so that the ribs cross each other, and on the lower surface of the deck board, there are a plurality of inter-girder connecting ribs that connect the intermediate and central girders, and a plurality of inter-digit orthogonal members that are orthogonal to the inter-girder connecting ribs. A plane in which ribs are suspended so that they intersect with each other, and cross ribs are also suspended on the bottom surface of the deck board other than the area located between the corner and middle girders and between the middle and middle girders. In the synthetic resin pallet of rectangular four-sided shape, the intermediate girder formed along the rib pitch of the inter-girder connecting rib connecting the corner girder and the intermediate girder formed along the long side and the long side rib pitch interdigit connecting rib connecting the middle digit, either short side Along formed, is formed along the rib pitch and short sides of the inter-digit connecting ribs connecting the Sumiketa intermediate girder is narrower than the rib pitch of digits between connecting rib connecting the middle digit and the central beam plastic pallet, characterized by that.

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