JP2005219754A - Synthetic resin-made pallet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a synthetic resin-made pallet capable of enhancing the strength and the rigidity of a connection part of an easily-deformable intermediate girder to an upper connection sash part of a center girder of the intermediate girder by increasing the wall thickness of a connection sash to constitute the upper connection sash part of the center girder of the intermediate girder to connect an upper end of the intermediate girder to an upper end of the center girder, and accordingly, capable of enhancing the strength and the rigidity of the synthetic resin-made pallet. <P>SOLUTION: In the synthetic resin-made pallet having corner girders 1 arranged at four corners of the synthetic resin-made pallet, intermediate girders 2 arranged at intermediate parts of the corner girders, and a center girder 3 arranged at a center part of the synthetic resin-made pallet, a connection sash 6c to constitute an upper connection sash part 6 of the center girder of the intermediate girders to connect an upper end of the intermediate girder to an upper end of the center girder has the wall thickness 6c2'. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to an integrally formed synthetic resin pallet used for transportation, transfer, storage, etc. of articles.

Conventionally, as shown in FIG. 21, both ends of the synthetic resin pallet P along the fork insertion passage p <b> 1 are placed on a shelf S or a conveyor arranged at a predetermined interval such as an automatic warehouse. Things have been done. In this way, when the synthetic resin pallet P is placed so as to straddle the shelves S, conveyors, etc. arranged at predetermined intervals, as shown in FIG. 21, the synthetic resin pallet P may bend downward. In order to prevent such downward bending deformation of the synthetic resin pallet P, a welded type composite in which a part of a lattice-like portion positioned in the vertical direction of the fork insertion path is reinforced and the same shaped skid is welded. A resin pallet is disclosed in Patent Document 1. Also, in an integrally molded synthetic resin pallet, for the sake of weight reduction, the upper and lower ribs connecting the middle beam and the central beam are cut out at a low height. A molded synthetic resin pallet is disclosed in Patent Document 2.
Japanese Utility Model Publication No. 54-31478 JP-A-6-122448

In the welding-type synthetic resin pallet disclosed in Patent Document 1 described above, a synthetic resin is used to reinforce part of the lattice-like portion positioned in the vertical direction of the fork insertion path of the pair of skids to be welded. There was a problem that the weight of the pallet made increased.

In addition, by reinforcing a part of the grid-like portion located in the vertical direction of the fork insertion path of the skid, it is possible to prevent the plastic resin pallet from being bent downward to some extent, but the fork insertion path is formed. There is a problem that loads are concentrated on the girders and the girders forming the fork insertion path are damaged together with the grid-like portions positioned in the vertical direction of the fork insertion path.

Further, a corner girder / intermediate girder connecting beam part for connecting the corner girder and the intermediate girder, and an intermediate girder / central girder beam part for connecting the intermediate girder and the central girder, which are opposed to the corner girder / intermediate girder connecting beam part, Since the strength and rigidity of the upper deck region surrounded by the material are not sufficient, there is a problem that the synthetic resin pallet is easily bent and deformed.

Furthermore, when the synthetic resin pallet P is placed so as to straddle the shelves S and the conveyors arranged at a predetermined interval, the circular portion C1 indicated by a single solid line in FIG. Since the circular portion C2 indicated by the double solid line, the circular portion C3 indicated by the single broken line, and the circular portion C4 indicated by the double broken line are deformed, this portion is reinforced. By doing so, it is conceivable to prevent downward deformation of the synthetic resin pallet P. However, if all such parts are reinforced, the weight of the synthetic resin pallet will be greatly increased.

In FIG. 21, a circle portion C1 indicated by a single solid line is a connecting portion between a corner girder and a corner girder / intermediate girder upper coupling bar described later or a middle girder and a middle girder / center girder upper coupling described later A circular portion C2 showing a connecting portion with a crosspiece and indicated by a double solid line is a connecting portion between a middle girder and a corner girder / intermediate girder lower connecting crosspiece described later or a middle girder and a middle described later A circular portion C3 showing a connecting portion with the lower connecting beam portion of the girder / center girder, and a circle portion C3 indicated by a single broken line is a connecting portion or a center between the intermediate beam and a later-described corner beam / intermediate beam upper connecting beam portion. A circular portion C4 indicated by a double broken line indicates a connecting portion between a girder and a middle girder / center girder upper connecting beam described later. The connecting part of the connecting part or the intermediate girder and the connecting part of the intermediate girder / center girder lower connecting bar described later It is.

An object of the present invention is to solve the problems of the above-described conventional synthetic resin pallets while minimizing the increase in the weight of the synthetic resin pallets.

In order to achieve the above-mentioned object, the present invention is arranged at the corner girder arranged at the four corners of the synthetic resin pallet, the intermediate girder arranged at the middle part of the corner girder, and the central part of the synthetic resin pallet. In the synthetic resin pallet having a central girder, first, there is provided a connecting bar that constitutes an intermediate girder / center girder upper connecting bar part that connects the upper end part of the intermediate girder and the upper end part of the central girder. Second, only the lower part of the connecting bar is made thicker, and third, only the part located on the intermediate beam side of the connecting bar is made thicker. Fourthly, a lower horizontal edge extending in the direction of the connecting beam is formed at the lower end of the adjacent connecting beam adjacent to the intermediate beam / center beam upper connecting beam, In the middle girder and middle girder lower part connecting the lower end of the middle girder and the lower end of the middle girder Is obtained by the connection bars constituting the crosspiece and thickness, the sixth, only the portion located on the central beam side of the connecting bar is obtained by the thickness.

The connecting beam that forms the middle beam / middle beam upper connecting beam portion connecting the upper end portion of the intermediate beam and the upper edge portion of the middle beam is made thick, so the intermediate beam and the intermediate beam / middle beam upper connecting beam that are easily deformed. The strength and rigidity of the connecting portion with the part can be increased, and as a result, the strength and rigidity of the synthetic resin pallet can be increased.

Since only the lower part of the connecting beam is made thicker, the strength and rigidity of the connecting part between the intermediate beam and the intermediate beam / middle beam upper connecting beam, which are easy to deform, are effectively suppressed while suppressing the increase in the weight of the synthetic resin pallet. Thus, the strength and rigidity of the synthetic resin pallet can be increased.

Since only the part located on the middle girder side of the connecting beam is made thick, the connecting part between the intermediate beam and the middle beam / middle girder upper connecting beam part that is easy to deform while suppressing the increase in the weight of the synthetic resin pallet. The strength and rigidity can be increased more effectively.

Since the lower edge of the adjacent connecting bar adjacent to the upper and lower middle connecting bars of the middle and middle girders is formed with a lower horizontal edge extending in the direction of the connecting bars, the intermediate beam and the upper connecting bars of the middle and middle girders are connected. The strength and rigidity of the portion can be further increased, and as a result, the strength and rigidity of the synthetic resin pallet can be increased.

Since the connecting beam that forms the intermediate beam / lower central beam connecting frame connecting the lower end of the intermediate beam and the lower end of the central beam is made thick, the intermediate beam that is easily deformed and the intermediate beam / lower central beam connection The strength and rigidity of the connecting portion with the crosspiece can be increased, and as a result, the strength and rigidity of the synthetic resin pallet can be increased.

Since only the part located on the side of the central beam of the connecting beam is thickened, the connecting part of the intermediate beam that is easy to deform and the lower beam of the intermediate beam and the central beam is suppressed while suppressing the increase in the weight of the plastic pallet. The strength and rigidity can be effectively increased, and as a result, the strength and rigidity of the synthetic resin pallet can be further increased.

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.

First, the overall configuration of a synthetic resin pallet integrally formed of synthetic resin will be described with reference to FIGS.

1 is a corner girder arranged at the four corners of the synthetic resin pallet, 2 is an intermediate girder arranged at the middle part of the corner girder 1, and 3 is arranged at the central part of the synthetic resin pallet. The middle digit.

An upper end portion of the corner beam 1 and an upper end portion of the intermediate beam 2 are connected by a later-described corner beam / intermediate beam upper connecting beam 4, and a lower end portion of the corner beam 1 and a lower end portion of the intermediate beam 2 are connected to each other. Are connected by a corner girder / intermediate girder lower coupling bar 5 described later. Further, the upper end portion of the intermediate beam 2 and the upper end portion of the central beam 3 are connected by an intermediate beam / central beam upper connecting beam 6 which will be described later, and the lower edge of the intermediate beam 2 and the lower edge of the central beam 3 are connected. These parts are connected to each other by an intermediate beam / center beam lower connecting beam 7 described later.

The planar shape surrounded by the two substantially crossed corner and middle girder upper connecting bars 4 and the two middle and middle girder upper connecting bars 6 that are substantially orthogonal to each other is a rectangular area. The upper corner beam / intermediate beam upper coupling beam portion 4 and the upper middle beam / center beam upper coupling beam portion 6 are connected to each other by an upper auxiliary beam portion 8. In this embodiment, the upper auxiliary crosspiece 8 is formed by a plurality of ribs 8a parallel to one corner girder / intermediate girder upper connecting crosspiece 4 and a plurality of ribs 8b intersecting the ribs 8a substantially at right angles. Has been.

The area where the back surface shape surrounded by the two substantially perpendicular corner beam / intermediate girder lower connecting beam portions 5 and the two intermediate beam / middle beam lower connecting beam portions 7 is substantially rectangular is described above. Such an auxiliary crosspiece 8 is not formed, and an opening 9 is formed. A fork insertion passage 10 is formed between the corner beam 1 and the intermediate beam 2 and between the intermediate beam 2 and the central beam 3.

Next, the corner beam 1 will be described mainly with reference to FIGS.

The corner girder 1 has a substantially rectangular tube-shaped tube portion 1a. The tube portion 1a is located on the fork insertion passage 10 side, and is substantially parallel to the two inner walls 1a1 and the fork insertion passage 10 side. It is formed from two outer walls 1a2 which are not positioned at substantially perpendicular to each other. Further, in the inside of the cylindrical portion 1a, a diagonal is formed from the outer corner portion 1b formed by the two outer walls 1a2 substantially orthogonal to the direction of the inner corner portion 1c formed by the two inner walls 1a1 substantially orthogonal. A diagonal partition wall 1d extending in the direction and having substantially the same height as the cylindrical portion 1a is formed. Furthermore, from the upper end of each inner wall 1a1 located in the vicinity of the inner corner 1c, it extends to the upper end of the diagonal partition wall 1d substantially perpendicular to the inner wall 1a1, and one of the vertical ends thereof is a pair. A pair of upper ribs 1e near the inner wall are formed on the corner partition wall 1b so as to match each other. Furthermore, from the upper end of each inner wall 1a1 located in the vicinity of the outer corner 1b, it extends to the upper end of the diagonal partition wall 1d substantially perpendicular to the inner wall 1a1, and one vertical end thereof is A pair of upper ribs 1f near the outer wall are formed on the diagonal partition wall 1b so as to coincide with each other. Still further, the upper end of each inner wall 1a1 located in the middle between the inner wall-side upper rib 1e and the outer wall-side upper rib 1f extends substantially perpendicularly to the inner wall 1a1 to the upper end of the diagonal partition wall 1d. In addition, a pair of central upper ribs 1g are formed so that one of the vertical ends thereof is aligned with each other in the diagonal partition wall 1b.

As shown in FIG. 7 and the like, an upper belt-like body 1e1 extending along the inner wall-side upper rib 1e is formed at the upper end of the above-described inner wall-side upper rib 1e, and is located near the inner wall 1a1. The width w1 of the upper band 1e1 is formed wider than the width w2 of the upper band 1e1 located on the diagonal partition wall 1b side. Similarly, an upper strip 1g1 extending along the central upper rib 1g is formed at the upper end of the above-described central upper rib 1g, and the width w3 of the upper strip 1g1 located near the inner wall 1a1 is as follows. The upper band 1g1 located on the diagonal partition wall 1b side is formed wider than the width w4. Thus, of the widths of the upper strips 1e1 and 1g1 formed at the upper ends of the upper ribs 1e and 1g formed on the corner beam 1, the upper band 1e1 located on the corner beam / intermediate beam upper connecting beam 4 side. 1g1 widths w1 and w3 are wider than the widths w2 and w4 of the other upper strips 1e1 and 1g1, so the connecting portion between the easily-deformable corner beam 1 and the corner beam / intermediate beam upper connection beam 4 The strength and rigidity of the pallet made of synthetic resin can be increased. In this embodiment, in the vicinity of the inner wall 1a1, an upper band 1e1 extending along the inner wall upper rib 1e and an upper band 1g1 extending along the central upper rib 1g are connected. Examples are shown, but they can be separated.

When the synthetic resin pallet P is placed so as to straddle the shelves S, conveyors, etc. arranged at a predetermined interval, the portions indicated by solid and broken circles in FIG. 21 are deformed. However, in particular, the portion C1 indicated by a single solid line in FIG. 21, that is, the connecting portion between the corner beam 1 and the corner beam / intermediate beam upper connecting beam portion 4 is greatly deformed. As described above, of the widths of the upper strips 1e1 and 1g1 formed at the upper ends of the upper ribs 1e and 1g formed on the corner beam 1, the upper strips 1e1 positioned on the corner beam / intermediate beam upper connecting beam 4 side, By forming the width w1 and w3 of 1g1 wider than the widths w2 and w4 of the other upper strips 1e1 and 1g1, corners that are easily deformed effectively while suppressing an increase in the weight of the synthetic resin pallet. Deformation of the connecting part between the girder 1 and the middle girder / center girder upper connecting beam 4 It is possible to prevent.

In the vicinity of the outer wall 1a2 of the cylindrical portion 1a constituting the corner beam 1, it extends substantially parallel along the outer wall 1a2, and connects the lower end portion of the inner wall 1a1 and the lower end portion of the diagonal partition wall 1d, and A pair of lower ribs 1h closer to the first outer wall are formed so that one of the vertical ends thereof coincides with the diagonal partition wall 1b. Similarly, the lower end of the inner wall 1a1 is connected to the lower end of the diagonal partition wall 1d along the lower rib 1h near the first outer wall, and one vertical end thereof is connected to the diagonal partition wall 1b. A pair of lower ribs 1i closer to the second outer wall are formed so as to match.

A lower surface plate 1j is formed in a region surrounded by the lower end of the inner wall 1a1, the lower end of the diagonal partition wall 1d, the lower end of the lower rib 1h near the first outer wall, and the lower end of the lower rib 1i near the second outer wall, A through hole 1j1 is formed in the bottom plate 1j for weight reduction and the passage of rainwater and cleaning liquid. Further, in the vicinity of the inner corner 1c, a substantially rectangular lower surface plate 1k that connects the lower ends of the pair of inner walls 1a1 is formed. The lower surface plate 1k has a light weight and allows passage of rainwater and cleaning liquid. Therefore, an appropriate number of through holes 1k1 are formed.

An upper surface plate 1m is formed in a region surrounded by the upper end of the outer wall 1a2, the upper end of the inner wall 1a1, and the upper end of the upper rib 1f near the outer wall, and the upper surface plate 1m has a weight reduction, rainwater, and cleaning liquid. An appropriate number of through-holes 1m1 are drilled for the passage of.

Next, the intermediate beam 2 will be described mainly with reference to FIGS. 9 and 10.

Similarly to the corner beam 1, the intermediate beam 2 also has a substantially rectangular tube portion 2a. The tube portion 2a has three inner walls positioned on the fork insertion passage 10 side, that is, opposite corner beams. It has a side inner wall 2a1 and a central girder side inner wall 2a2, and a single outer wall 2a3 facing the central girder side inner wall 2a2. Inside the cylindrical portion 2a, a substantially central portion of the central girder-side inner wall 2a2 and a substantially central portion of the outer wall 2a3 are connected, and a single partition wall 2b having substantially the same height as the cylindrical portion 2a is formed. In addition, in the vicinity of the central girder side inner wall 2a2, a single partition wall that is substantially parallel to the central girder side inner wall 2a2 and that connects the opposite corner girder side inner wall 2a1 and has substantially the same height as the cylindrical portion 2a. 2c is formed, and an appropriate number of bridging partition walls 2d having substantially the same height as the cylindrical portion 2a are formed between the central girder side inner wall 2a2 and the partition wall 2c.

The upper ends of the opposite corner beam side inner walls 2a1 are connected by a plurality of upper ribs 2e that connect the upper ends of the opposite corner beam side inner walls 2a1. Similarly, the lower end portion of the opposite corner beam inner wall 2a1 is also connected by a plurality of lower ribs 2f substantially parallel to the outer wall 2a3.

At the upper end of the upper rib 2e described above, an upper belt-like body 2e1 is formed that extends along the upper rib 2e and connects the opposite corner girder inner walls 2a1, and is formed in the vicinity of the opposite corner girder inner wall 2a1. The width w5 of the upper band-shaped body 2e1 positioned, in other words, the width w5 of both ends of the upper band-shaped body 2e1 is formed wider than the width w6 of the central part of the upper band-shaped body 2e. By configuring in this way, it is possible to increase the strength and rigidity of the connecting portion between the intermediate girder 2 that is easily deformed and the intermediate girder / center girder upper connecting beam portion 4, and consequently the strength and rigidity of the synthetic resin pallet. Can be increased.

An upper surface plate 2j is formed in a region surrounded by the upper end of the outer wall 2a3 and the upper end of the upper wall 2a1 facing the outer wall 2a3 and the upper end of the corner-girder side inner wall 2a1. 2j has an appropriate number of through holes 2j1 for weight reduction and the passage of rainwater and cleaning liquid. Further, a lower plate 2k is formed at the lower end of the lower rib 2f along the lower rib 2f and bridging the opposite corner beam side inner walls 2a1.

Next, the central girder 3 will be described mainly with reference to FIGS. 11 and 12.

Similarly to the corner beam 1 and the intermediate beam 2, the central beam 3 also has a substantially rectangular tube-shaped tube portion 3 a, and the tube portion 3 a has four sheets facing the center beam side inner wall 2 a 2 of the intermediate beam 2. It is comprised by the surrounding wall 3a1. A pair of diagonal partition walls 3b, which connect opposite corners and have substantially the same height as the cylinder part 3a, are formed inside the cylinder part 3a so as to intersect at the vertical center part thereof. In addition, an appropriate number of upper ribs 3c extending from the upper end of each peripheral wall 3a1 to the diagonal partition wall 3b substantially perpendicular to each peripheral wall 3a1 are formed. Furthermore, an appropriate number of lower ribs 3d are formed from the lower end of each peripheral wall 3a1 so as to be substantially perpendicular to each peripheral wall 3a1 and extend to the diagonal partition wall 3b.

Next, a corner girder / intermediate girder upper coupling beam 4 that couples the upper end of the corner girder 1 and the upper end of the intermediate girder 2, and a corner girder that couples the lower end of the corner girder 1 and the lower end of the intermediate girder 2 The intermediate girder lower connecting beam 5 and the intermediate beam connecting the upper end of the intermediate beam 2 and the upper end of the central beam 3 will be described. .

First, the corner girder / intermediate girder upper connecting beam 4 that couples the upper end of the corner girder 1 and the upper end of the intermediate girder 2 will be described mainly with reference to FIGS. 5, 13, and 14.

A corner girder / intermediate girder upper connecting frame 4 that connects the upper end of the corner girder 1 and the upper end of the intermediate girder 2 is formed between the upper end of the inner wall 1a1 that forms the cylindrical portion 1a of the corner girder 1 and the intermediate girder 2 While connecting with the upper end part of the center girder side inner wall 2a2 which forms the cylinder part 2a, it has the inner wall connection crosspiece 4a substantially orthogonal to the corner girder side inner wall 2a1. Further, the corner beam / intermediate beam upper connecting beam portion 4 is positioned above the inlet portion of the fork insertion passage 10 and is opposed to the inner wall 1a1 and the upper end portion of the inner wall 1a1 that forms the cylindrical portion 1a of the corner beam 1. An edge bar 4b is provided to connect the upper end of the corner beam side inner wall 2a1. The edge rail 4b includes an upper horizontal portion 4b1, a lower horizontal portion 4b2 narrower than the upper horizontal portion 4b1, and a vertical portion 4b3 connecting the inner end of the upper horizontal portion 4b1 and the inner end of the lower horizontal portion 4b2. The cross-sectional shape formed along the inner wall 1a1 that forms the cylindrical portion 1a of the corner beam 1 is formed in a substantially C shape, and within the substantially C-shaped edge bar 4b, a predetermined interval is formed. And a substantially trapezoidal plate-like reinforcing rib 4b4 is formed (see FIGS. 1 and 3).

Further, the corner beam / intermediate beam upper connecting beam 4 includes an upper end portion of the inner wall 1a1 and a tube of the intermediate beam 2 forming a tube portion 1a of the corner beam 1 positioned between the inner wall connecting beam 4a and the edge beam 4b. An appropriate number of intermediate connecting bars 4c for connecting the upper end of the corner-girder-side inner wall 2a1 forming the portion 2a is provided. In this embodiment, an example in which four intermediate connecting bars 4c are formed is shown. Further, the inner wall connecting bar 4a, the edge bar 4b, and the intermediate connecting bar 4c are connected by an appropriate number of intersecting bars 4d that intersect with these bars 4a, 4b, and 4c.

The above-mentioned upper rib 1e near the inner wall formed in the cylindrical portion 1a of the corner beam 1 and the predetermined intermediate connection beam 4c of the corner beam / intermediate beam upper connection beam portion 4 are connected in a substantially straight line. The central upper rib 1g formed in the cylindrical portion 1a of the corner beam 1 and the predetermined upper rib 2e formed in the cylindrical portion 2a of the intermediate beam 2 are It is connected in a substantially straight line via a predetermined intermediate connecting bar 4c. Further, an upper rib 1f near the outer wall formed in the cylindrical portion 1a of the corner girder 1 and a predetermined upper rib 2e formed in the cylindrical portion 2a of the intermediate girder 2 are vertical portions 4b3 forming an edge bar 4b. Are connected in a substantially straight line.

Mainly, as shown in FIGS. 5, 13 and 15, a predetermined upper rib 2e formed in the cylindrical portion 2a of the intermediate beam 2 and a predetermined upper portion of the corner beam / intermediate beam upper connecting beam 4 The height h1 of the portion near the inner wall 1a1 of the central upper rib 1g formed in the cylindrical portion 1a of the corner beam 1 that is connected in a substantially straight line via the intermediate connecting bar 4c is a predetermined height from the inner wall 1a1. The length of the upper rib 1e near the inner wall is higher than the height h2 of the portion near the diagonal partition wall 1d. In addition, a predetermined upper rib 2e formed in the cylindrical portion 2a of the intermediate beam 2 and a vertical portion 4b3 of the edge beam 4b forming the corner beam / intermediate beam upper connecting beam portion 4 are substantially straight. The height h3 of the connected portion near the inner wall 1a1 of the upper rib 1f near the outer wall formed in the cylindrical portion 1a of the corner beam 1 extends from the inner wall 1a1 to a predetermined length of the upper rib 1f near the outer wall. The height h4 of the portion closer to the diagonal partition wall 1d is configured. The predetermined upper rib 2e formed in the cylindrical portion 2a of the intermediate beam 2 is not connected in a substantially straight line through the predetermined intermediate connection beam 4c of the corner beam / intermediate beam upper connection beam portion 4. However, the inner wall of the upper rib 1e near the inner wall formed in the cylindrical portion 1a of the corner beam 1 is connected to the predetermined intermediate connection beam 4c of the corner beam / intermediate beam upper connection beam portion 4 in a substantially straight line. The height h5 of the portion closer to 1a1 can be configured to be higher than the height h6 of the portion closer to the diagonal partition wall 1d of the upper rib 1e closer to the inner wall over a predetermined length from the inner wall 1a1.

As described above, a predetermined upper rib 2e formed in the cylindrical portion 2a of the intermediate beam 2 and a predetermined intermediate connection beam 4c of the corner beam / intermediate beam upper connection beam portion 4 are connected in a substantially straight line. The height h1 of the portion near the inner wall 1a1 of the central upper rib 1g in the cylindrical portion 1a of the corner beam 1 is made higher than the height h2 of the portion near the diagonal partition wall 1d, thereby The strength and rigidity of the connecting portion with the corner beam / intermediate beam upper connecting beam portion 4 can be increased. Similarly, a predetermined upper rib 2e formed in the cylindrical portion 2a of the intermediate beam 2 and a vertical portion 4b3 of the edge beam 4b that forms the corner beam / intermediate beam upper connecting beam portion 4 are substantially straight. By making the height h3 of the portion near the inner wall 1a1 of the upper rib 1f near the outer wall in the cylindrical portion 1a of the corner beam 1 higher than the height h4 of the portion near the diagonal partition wall 1d, The strength and rigidity of the connecting portion between 1 and the corner beam / intermediate beam upper connecting beam portion 4 can be further increased. Further, if necessary, the inner wall of the upper rib 1e near the inner wall in the cylindrical portion 1a of the corner beam 1 is connected to the predetermined intermediate connection beam 4c of the corner beam / intermediate beam upper connection beam portion 4 in a substantially straight line. By making the height h5 closer to 1a1 higher than the height h6 closer to the diagonal partition wall 1d, the strength and rigidity of the connecting portion between the corner beam 1 and the corner beam / intermediate upper beam connecting portion 4 are further increased. It can be increased.

Further, the height h1 of the portion near the inner wall 1a1 of the central upper rib 1g formed in the cylindrical portion 1a of the corner beam 1 that is configured to be higher than the height h2 of the portion near the diagonal partition wall 1d is the corner beam. It is formed higher than the height h1 ′ of the lower rib 1i near the second outer wall and the height of the lower rib 1h near the first outer wall located at the lower end in the one cylindrical portion 1a. In this way, by reducing the height h1 ′ of the second outer wall-side lower rib 1i and the first outer wall-side lower rib 1h, etc., which are located at the lower end in the cylindrical portion 1a of the corner beam 1, the synthetic resin is reduced. The synthetic resin pallet can be effectively reduced in weight without greatly reducing the strength and rigidity of the pallet made.

When the synthetic resin pallet P is placed so as to straddle the shelves S, conveyors, etc. arranged at a predetermined interval, the portions indicated by solid and broken circles in FIG. 21 are deformed. However, in particular, the portion C1 indicated by a single solid line in FIG. 21, that is, the connecting portion between the corner beam 1 and the corner beam / intermediate beam upper connecting beam portion 4 is greatly deformed. As described above, the height h1 of the central upper rib 1g near the inner wall 1a1 formed in the cylindrical portion 1a of the corner girder 1 is diagonally opposite the inner wall upper rib 1e from the inner wall 1a1 over a predetermined length. The height h3 of the portion closer to the inner wall 1a1 of the upper rib 1f closer to the outer wall formed in the cylindrical portion 1a of the corner girder 1 is formed higher than the height h2 of the portion closer to the partition wall 1d. The diagonal partition wall of the upper rib 1f near the outer wall over a predetermined length The height h5 of the portion near the inner wall 1a1 of the upper rib 1e near the inner wall formed in the cylindrical portion 1a of the corner beam 1 is set higher than the height h4 of the portion closer to d from the inner wall 1a1. By forming it higher than the height h6 of the portion closer to the diagonal partition wall 1d of the upper rib 1e near the inner wall over the length, the weight of the synthetic resin pallet is effectively suppressed and easily deformed. Deformation of the connecting portion between the corner beam 1 and the intermediate beam / center beam upper connecting beam portion 4 can be prevented.

Further, as shown in FIG. 5 and FIG. 13, among the intermediate connection bars 4 c forming the corner beam / intermediate beam upper connection beam part 4, the intermediate beam 1 c is connected to the inner wall 1 a 1 of the cylindrical part 1 a of the corner beam 1. The thickness t1 of the part is formed to be thicker than the thickness t2 of the other part over a predetermined length. Similarly, the thickness t3 of the portion connected to the inner wall 1a1 of the cylindrical portion 1a of the corner beam 1 in the vertical portion 4b3 of the edge beam 4b that forms the corner beam / intermediate beam upper connection beam portion 4 is also set to a predetermined value. Is formed thicker than the thickness t4 of the other part. In this way, by forming a thick portion over a predetermined length in the intermediate connecting bar 4c on the inner wall 1a1 side of the cylindrical part 1a of the corner beam 1 and the vertical part 4b3 of the edge beam 4b, the corner beam is formed. The strength and rigidity of the connecting portion between 1 and the corner beam / intermediate beam upper connecting beam portion 4 can be increased. In the present embodiment, the thickness t1 of the intermediate connecting bar 4c located between the inner wall 1a1 of the cylindrical part 1a of the corner beam 1 and the crossing bar 4d closest to the inner wall 1a1 is the other part. An example in which the wall thickness t2 is formed thicker is shown, and similarly, an edge portion located between the inner wall 1a1 of the cylindrical portion 1a of the corner beam 1 and the cross beam 4d closest to the inner wall 1a1. Although an example in which the thickness t3 of the vertical portion 4b3 of the crosspiece 4b is formed to be thicker than the thickness t4 of other portions is shown, it is not limited to such an embodiment.

As described above, when the synthetic resin pallet P is placed so as to straddle the shelves S, conveyors, etc. arranged at predetermined intervals, it is indicated by solid and broken circles in FIG. In particular, the portion C1 shown by the single solid line in FIG. 21, that is, the connecting portion between the corner beam 1 and the upper connecting beam portion 4 of the corner beam / intermediate beam is greatly deformed. Therefore, as described above, the thickness t1 of the portion connected to the inner wall 1a1 of the cylindrical portion 1a of the corner beam 1 of the intermediate connection beam 4c forming the corner beam / intermediate beam upper connection beam portion 4 is determined. The vertical portion 4b3 of the edge beam 4b that is formed to be thicker than the thickness t2 of the other part over a predetermined length and / or forms the corner beam / intermediate beam upper connecting beam portion 4 Among these, the thickness t3 of the portion connected to the inner wall 1a1 of the cylindrical portion 1a of the corner beam 1 is set to a predetermined length. Therefore, by forming it thicker than the thickness t4 of the other part, the corner girder 1 and the upper part of the corner girder / intermediate girder which are more easily deformed while suppressing the increase in the weight of the synthetic resin pallet. Deformation of the connecting portion with the connecting bar portion 4 can be prevented.

Next, the corner girder / intermediate girder lower connecting beam 5 that couples the lower end of the corner girder 1 and the lower end of the intermediate girder 2 will be described with reference to FIGS. 5, 9, 10, and 19.

A corner girder / intermediate girder lower connecting bar 5 that couples the lower end of the corner girder 1 and the lower end of the intermediate girder 2 includes a lower end of the inner wall 1a1 that forms the cylindrical portion 1a of the corner girder 1, and the inner wall 1a1. An appropriate number of connecting bars 5a for connecting the opposite ends of the inner wall 2a1 of the corner beam side forming the cylindrical part 2a of the intermediate beam 2 and an appropriate number of intersecting bars 5b intersecting the connecting bars 5a substantially at right angles. It is configured. Of the connecting bars 5a, the connecting bar 5a1 positioned on the inlet side of the fork insertion passage 10 is formed so that the inlet side of the fork insertion path 10 is low, and the connecting bar 5a1 is positioned on the inlet side of the fork insertion path 10. The crosspiece 5a1 is formed with an inclined surface 5a2 that is inclined upward toward the central beam 3. With this configuration, the wheel of the hand forklift that is inserted into the fork insertion passage 10 can be easily passed over the corner girder / intermediate girder lower link bar 5.

The thickness t5 of the portion connected to the corner-girder side inner wall 2a1 of the intermediate beam 2 out of the connection beam 5a forming the corner beam / intermediate beam lower connection beam portion 5 extends over a predetermined length, and so on. It is formed thicker than the thickness t6 of the portion. In this way, the thickness t5 of the portion connected to the inner side wall 2a1 of the intermediate beam 2 in the connecting beam 5a is made thicker than the thickness t6 of the other portion over a predetermined length. By forming the intermediate girder 2, the strength and rigidity of the connecting portion between the intermediate beam 2 and the corner beam / intermediate beam lower connecting beam portion 5 can be increased. In this embodiment, the wall thickness t5 of the connecting beam 5a located between the corner beam inner wall 2a1 of the intermediate beam 2 and the cross beam 5b closest to the corner beam inner wall 2a1 is the other portion. Although an example in which the thickness is greater than the thickness t6 is shown, it is not limited to such an embodiment.

As described above, when the synthetic resin pallet P is placed so as to straddle the shelves S, conveyors, etc. arranged at predetermined intervals, it is indicated by solid and broken circles in FIG. In particular, the portion C2 indicated by the double solid line in FIG. 21, that is, the connecting portion between the intermediate beam 2 and the corner beam / intermediate beam lower connecting beam portion 5 is greatly deformed. Therefore, as described above, the thickness t5 of the portion connected to the inner wall 2a1 of the intermediate beam 2 of the connecting beam 5a forming the lower beam beam 5 of the corner beam / intermediate beam, An intermediate girder 2 that is more easily deformed while suppressing the increase in the weight of the synthetic resin pallet by forming it thicker than the thickness t6 of the other part over a predetermined length. Deformation of the connecting portion with the corner beam / intermediate beam lower connecting beam portion 5 can be prevented.

Next, with reference to FIGS. 9, 11, and 16 to 18, the intermediate girder / central girder upper connecting beam 6 that connects the upper end of the intermediate girder 2 and the upper end of the central girder 3 will be described. .

An intermediate girder / center girder upper connecting beam 6 that connects the upper end of the intermediate girder 2 and the upper end of the central girder 3 includes an upper end of a corner girder inner wall 2a1 that forms a cylindrical portion 2a of the intermediate girder 2, A pair of opening side connecting bars 6a that connect the corner girder side inner wall 2a1 and the upper end portion of the peripheral wall 3a1 that forms the cylindrical portion 3a of the central girder 3 positioned in the same virtual plane are provided. The intermediate girder / center girder upper connecting bar 6 has a pair of adjacent connecting bars 6b extending substantially parallel to the opening side connecting bar 6a at a predetermined interval from the opening side connecting bar 6a. Furthermore, a plurality of inverted U-shaped connecting bars 6c each having a substantially inverted U-shaped side sectional shape perpendicular to the length direction are formed between the adjacent adjacent connecting bars 6b. . The inverted U-shaped connecting bar 6c is formed by a horizontal portion 6c1 and an opposing vertical portion 6c2 extending downward from both edges of the horizontal portion 6c1. In this embodiment, as an example, the intermediate beam / center beam upper connecting beam 6 is positioned adjacent to the two opening-side connecting beams 6a located at both ends and the opening-side connecting beam 6a. An example is shown in which two adjacent connecting bars 6b and two inverted U-shaped connecting bars 6c located between the adjacent connecting bars 6b are formed.

Between the opening-side connecting bar 6a and the adjacent connecting bar 6b described above, a thin plate-like bridging portion 6d is provided at a predetermined interval so as to be orthogonal to the opening-side connecting bar 6a and the adjacent connecting bar 6b. In addition, partition ribs can be formed inside the inverted U-shaped connecting bar 6c at predetermined intervals so as to be orthogonal to the longitudinal direction of the inverted U-shaped connecting bar 6c. The horizontal portion 6c1 constituting the inverted U-shaped connecting bar 6c is provided with an appropriate number of through holes 6c3 for weight reduction and the passage of rainwater and cleaning liquid.

As shown in FIG. 16, the lower thick portion 6c2 having a thickness t8 larger than the upper thickness t7 is provided below the vertical portion 6c2 constituting the inverted U-shaped connecting bar 6c. 'Is formed. The lower thick part 6c2 ′ of the vertical part 6c2 is opposed to the central girder side inner wall 2a2 from the central girder side inner wall 2a2 that forms the cylindrical part 2a of the intermediate girder 2 over the entire length of the vertical part 6c2. The lower thick portion 6c2 ′ of the vertical portion 6c2 can be formed over the entire length up to the inner wall 3a1 forming the cylindrical portion 3a of the central girder 3 in consideration of the weight reduction of the synthetic resin pallet. It is preferable to form only a predetermined length from the central girder side inner wall 2a2 forming the cylindrical portion 2a of the intermediate girder 2 without forming it over the entire length of the vertical portion 6c2. In this way, the inverted U-shaped connecting bar 6c is connected to the central girder side inner wall 2a2 forming the cylindrical portion 2a of the intermediate girder 2 in the direction of the central girder 3 over a predetermined length or over the entire length. By making the lower part of the vertical part 6c2 constituting the lower thick part 6c2 ′ thicker than the upper part of the vertical part 6c2, the strength of the connecting part between the intermediate beam 2 and the intermediate beam / middle beam upper connecting beam part 6 can be increased. Stiffness can be increased.

When the inverted U-shaped connecting bar 6c constituting the intermediate girder / center girder upper connecting bar part 6 that connects the upper end part of the intermediate girder 2 and the upper end part of the central girder 3 is injection-molded, the reverse U-shaped connection The mold for forming the inner surface of the crosspiece 6c moves downward, and the mold for forming the outer surface of the inverted U-shaped connection crosspiece 6c moves upward, so that the inner surface of the vertical portion 6c2 is flat. The lower thick portion 6c2 ′ is formed by expanding the lower outer surface of the vertical portion 6c2 outward.

In the above-described embodiment, the lower thick portion 6c2 ′ formed in the lower portion of the vertical portion 6c2 constituting the inverted U-shaped connecting bar 6c and the upper thin portion positioned above the lower thick portion 6c2 ′. Although an example in which a step is formed between 6c2 ″ is shown, as shown in FIG. 16, the thickness of the vertical portion 6c2 is set to be vertical so that such a step does not occur. It can also be configured such that the thickness gradually increases from the upper end to the lower end of the portion 6c2.

Further, as shown in FIG. 18, among the inverted U-shaped connecting bars 6 c constituting the intermediate girder / center girder upper connecting bar 6, the central girder-side inner wall 2 a 2 forming the cylindrical part 2 a of the intermediate girder 2. The entire reverse U-shaped connecting bar 6c is formed in the thick part 6c 'by a predetermined length from the first or only the vertical part 6c2 is formed in the thick part 6c' over its entire height. As shown in FIG. 16, a lower thick portion 6c2 ′ can be formed in the vertical portion 6c2 of the inverted U-shaped connecting bar 6c extending from the portion 6c ′ to the peripheral wall 3a1 of the central girder 3. An inclined surface 6c ″ is preferably formed between the outer surface of the thick portion 6c ′ and the outer surface of the vertical portion 6c2. Further, the inclined surface 6c ″ is formed below the vertical portion 6c2 of the inverted U-shaped connecting bar 6c. The formed lower thick part 6c2 ′ is not formed up to the peripheral wall 3a1 of the central girder 3, and the lower thick part 6c2 ′ is not formed for a predetermined length portion on the peripheral wall 3a1 side of the central girder 3. With such a configuration, it is possible to reduce the weight of the synthetic resin pallet while increasing the strength and rigidity of the connecting portion between the intermediate beam 2 and the intermediate beam / center beam upper connecting beam portion 6.

As described above, when the synthetic resin pallet P is placed so as to straddle the shelves S, conveyors, etc. arranged at predetermined intervals, it is indicated by solid and broken circles in FIG. In particular, the portion C1 indicated by a single solid line in FIG. 21, that is, the connecting portion between the intermediate beam 2 and the intermediate beam / center beam upper connecting beam portion 6 is greatly deformed. Therefore, as described above, out of the inverted U-shaped connecting bars 6c constituting the intermediate girder / center girder upper connecting bar 6, the central girder side inner wall 2a2 forming the cylindrical part 2a of the intermediate girder 2 has a predetermined length. The weight of the synthetic resin pallet can be reduced by forming the entire inverted U-shaped connecting bar 6c as the thick part 6c 'and / or forming the lower thick part 6c2' in the vertical part 6c2. Middle girder 2 and middle girder / center which are more easily deformed while suppressing increase It is possible to prevent the deformation of the connecting portion between the upper connecting rail 6.

Further, a lower end horizontal edge 6b1 extending in the direction of the inverted U-shaped connecting bar 6c is provided at the lower end of the adjacent connecting bar 6b over the entire length of the adjacent connecting bar 6b. It is formed over the entire length from the central girder side inner wall 2a2 that forms 2a to the inner wall 3a1 that forms the cylindrical portion 3a of the central girder 3 that faces the central girder side inner wall 2a2. In this way, the lower end horizontal edge 6b1 extending in the direction of the inverted U-shaped connecting bar 6c is formed at the lower end of the adjacent connecting bar 6b. The strength and rigidity of the connecting portion can be further increased.

As shown in FIG. 5 and FIG. 6, an inner wall connecting bar 4 a constituting one corner girder / intermediate girder upper connecting bar part 4 that connects the upper end part of the corner beam 1 and the upper end part of the intermediate beam 2, An inner wall connection is formed at a corner formed by the inner wall connection beam 4a constituting the other corner beam / intermediate beam upper connection beam part 4 orthogonal to the one corner beam / intermediate beam upper connection beam part 4. Corner connecting ribs 11 that connect the crosspieces 4a are formed. Further, between the inner wall connecting bar 4a and the intermediate connecting bar 4c 'closest to the inner wall connecting bar 4a between the inner wall connecting bar 4a and the intermediate connecting bar 4c. Thus, a bridging rib 12 is formed which is substantially vertical and connected to both ends of the corner connecting rib 11. Thus, by forming the corner connecting rib 11 and the bridging rib 12, one corner beam / intermediate beam upper connecting beam portion 4 that connects the upper end portion of the corner beam 1 and the upper end portion of the intermediate beam 2 is configured. Connecting the inner wall connecting bar 4a to the upper end of the corner beam 1 and the upper end of the intermediate beam 2, and perpendicular to the one corner beam / middle beam upper connecting beam 4 and the other corner beam / middle. At the corner formed by the inner wall connecting bar 4a constituting the upper girder connecting bar part 4, an intermediate connecting bar 4c 'closest to the inner wall connecting bar 4a constituting one corner girder / intermediate girder upper connecting bar part 4 is formed. The intermediate connecting bar 4c 'closest to the inner wall connecting bar 4a constituting the other corner beam / intermediate beam upper connecting bar part 4, the corner connecting rib 11, the pair of bridging ribs 12, and the corner beam 1 Since a substantially hexagonal annular rib R formed by the inner corner 1c is formed, the corner beam 1 and the corner beam It is possible to further enhance the strength and rigidity of the connecting portion between the intermediate girder upper connecting rail 4.

Next, the intermediate girder / center girder lower connecting beam portion 7 that couples the lower end portion of the intermediate girder 2 and the lower end portion of the central girder 3 will be described mainly with reference to FIGS. 9, 11, 19, and 20.

The middle beam / center beam lower connecting beam 7 connecting the lower end of the intermediate beam 2 and the lower beam of the central beam 3 is provided on both sides of the central beam 7a with a predetermined distance from the central beam 7a and the central beam 7a. It is formed from an inclined bar 7b. The central crosspiece 7a is formed by a horizontal plate portion 7a1 and a vertical plate portion 7a2 extending upward from at least both ends of the horizontal plate portion 7a1. The inclined bar 7b is formed of an inclined plate part 7b1 inclined upward toward the central bar 7a, and a vertical plate part 7b2 extending downward from both ends of the inclined plate part 7b1. Further, the horizontal plate-like portion 7a1 constituting the central beam 7a can be provided with a through hole 7a1 'for weight reduction and the passage of rainwater and cleaning liquid, and similarly, the inclined beam 7b is constituted. The inclined plate portion 7b1 can also be provided with a through-hole for reducing the weight and passing rainwater or cleaning liquid as necessary. In the present embodiment, an example is shown in which a vertical plate portion 7a2 extending upward is also erected at the central portion of the horizontal plate-like portion 7a1 constituting the central rail 7a. An appropriate number of vertical plate portions 7a2 can be erected. In addition, an appropriate number of intersecting portions 7a3 connecting the vertical plate portions 7a2 are formed on the central rail 7a at a predetermined interval.

As shown in FIG. 20, both ends of the horizontal plate-like portion 7a1 constituting the central beam 7a of the intermediate beam / center beam lower connecting beam portion 7 for connecting the lower end portion of the intermediate beam 2 and the lower edge portion of the center beam 3. The upper part of the vertical plate portion 7a2 extending upward from the peripheral wall 3a1 of the central beam 3 toward the inner wall 2a2 of the intermediate beam 2 has a thickness t9 of the lower part over a predetermined length. In comparison, an upper thick portion 7a2 'having a thick thickness t10 is formed. The upper thick part 7a2 ′ is not formed over the entire section from the peripheral wall 3a1 of the central girder 3 to the central girder side inner wall 2a2 of the intermediate girder 2, and has a predetermined length from the peripheral wall 3a1 of the central girder 3 It is formed only throughout. Thus, by forming the upper thick part 7a2 'only from the peripheral wall 3a1 of the central girder 3 over a predetermined length, the central girder 3 and the intermediate girder are reduced while reducing the weight of the synthetic resin pallet. -Strength and rigidity of the connecting part with the central girder lower connecting bar part 7 can be increased. In this embodiment, the thickness t10 of the vertical plate portion 7a2 located between the peripheral wall 3a1 of the central girder 3 and the intersecting portion 7a3 closest to the peripheral wall 3a1 is larger than the thickness t9 of other portions. Although an example in which the thickness is formed is shown, the present invention is not limited to such an example.

The upper thick portion 7a2 formed on the upper portion of the vertical plate portion 7a2 constituting the central beam 7a of the intermediate beam / center beam lower connecting beam portion 7 for connecting the lower end portion of the intermediate beam 2 and the lower edge portion of the center beam 3 described above. A thick portion like 'can also be provided in the vertical plate portion 7b2 of the inclined beam 7b formed by the intermediate beam / center beam lower connection beam portion 7.

When the synthetic resin pallet P is placed so as to straddle the shelves S, conveyors, etc. arranged at a predetermined interval, the portions indicated by solid and broken circles in FIG. 21 are deformed. However, in particular, the portion C2 indicated by the double solid line in FIG. 21, that is, the connecting portion between the central girder 3 and the middle girder / center girder lower connecting beam 7 is greatly deformed. An upper thick part 7a2 'is formed over a predetermined length from the peripheral wall 3a1 of the central beam 3 on the vertical plate 7a2 constituting the central beam 7a of the intermediate beam / center beam lower connecting beam 7 Thus, it is possible to effectively prevent deformation of the connecting portion between the central girder 3 and the middle girder / center girder lower connecting bar portion 7 which are easily deformed while suppressing an increase in the weight of the synthetic resin pallet.

When injection molding the central beam 7a constituting the intermediate beam / center beam lower connecting beam portion 7 for connecting the lower end portion of the intermediate beam 2 and the lower edge portion of the center beam 3, a mold for forming the inner surface of the center beam 7a Is moved upward, and the mold for forming the outer surface of the central rail 7a is configured to move downward. Therefore, the inner surface of the central rail 7a is formed flat, and the upper thick portion 7a2 ' It is formed by bulging the upper outer surface of the vertical plate portion 7a2 outward.

In the above-described embodiment, an example is shown in which the upper thick portion 7a2 ′ thicker than the lower portion of the vertical plate portion 7a2 is formed on the upper portion of the vertical plate portion 7a2 constituting the central rail 7a. The thickness of the vertical plate portion 7a2 can be configured to gradually increase from the lower end to the upper end of the vertical plate portion 7a2.

Further, as shown in FIGS. 10 and 15, in the cylindrical portion 2 a of the intermediate beam 2, which is connected to the predetermined connection beam 5 a of the corner beam / intermediate beam lower connection beam portion 5 substantially in a straight line. The height h7 of the portion near the corner girder inner wall 2a1 connected to the corner girder inner wall 2a1 of the predetermined lower rib 2f is a height h8 at the center of the lower rib 2f over a predetermined length. Configured higher. In this way, the corner beam of the predetermined lower rib 2f formed in the cylindrical portion 2a of the intermediate beam 2 is connected to the predetermined connection beam 5a of the lower beam beam 5 of the corner beam / intermediate beam. By configuring the height h7 of the portion near the corner girder side inner wall 2a1 connected to the side inner wall 2a1 to be higher than the height h8 of the central portion of the lower rib 2f, the intermediate girder 2 and the corner girder / intermediate girder lower connecting beam The strength and rigidity of the connecting portion with the portion 5 can be increased.

Of the lower ribs formed in the cylindrical portion 2a of the intermediate beam 2 that are not connected to the predetermined connection beam 5a of the corner beam / intermediate beam lower connection beam 5 in a straight line, the inner wall 2a1 on the corner beam side. It is also possible to configure the height of the portion connected to the upper portion to be higher than the height of the central portion of the lower rib over a predetermined length. By comprising in this way, the intensity | strength and rigidity of the connection part of the intermediate beam 2 and the corner beam / intermediate beam lower connection beam part 5 are further improved.

The height h7 of the lower rib 2f near the corner girder inner wall 2a1, which is formed higher than the height h8 of the central portion of the lower rib 2f described above, is a predetermined value that forms the corner girder / intermediate girder upper link 4 It is formed higher than the height h7 ′ of the upper rib 2e. That is, the height h7 ′ of the predetermined upper rib 2e forming the corner beam / intermediate girder upper connecting beam portion 4 is closer to the inner wall 2a1 of the lower rib 2f constituting the corner beam / middle beam lower connecting beam portion 5 The height of the portion is lower than h7. As described above, the height h7 ′ of the predetermined upper rib 2e forming the corner beam / intermediate girder upper connecting beam 4 is set to the inner wall of the plurality of lower ribs 2f substantially parallel to the outer wall 2a3 of the intermediate beam 2. By forming the height lower than the height h7 of the portion near the corner girder inner wall 2a1 connected to 2a1, the synthetic resin pallet is effectively reduced in weight without significantly reducing the strength and rigidity of the synthetic resin pallet. be able to.

As described above, when the synthetic resin pallet P is placed so as to straddle the shelves S, conveyors, etc. arranged at predetermined intervals, it is indicated by solid and broken circles in FIG. 21 will be deformed, in particular, the portion C2 shown by the double solid line in FIG. 21, that is, the connecting portion between the connecting portion between the intermediate beam 2 and the corner beam / intermediate beam lower connecting beam portion 5 Therefore, as described above, the portion near the corner girder inner wall 2a1 connected to the corner girder inner wall 2a1 of the predetermined lower rib 2f formed in the cylindrical portion 2a of the intermediate girder 2 is formed. By forming the height h7 higher than the height h8 of the central portion of the lower rib 2f over a predetermined length, the weight of the synthetic resin pallet can be effectively and easily deformed while suppressing an increase. Prevents deformation of the connecting part between the intermediate beam 2 and the corner beam / intermediate beam lower connecting beam 5 Rukoto can.

Further, as shown in FIG. 12, in the central girder 3, there is a lower rib 3d extending from the lower end of each peripheral wall 3a1 to the diagonal partition wall 3b substantially perpendicular to each peripheral wall 3a1. Although an appropriate number is formed, the height h9 of the lower rib 3d is substantially constant from the diagonal partition wall 3b to the vicinity of the peripheral wall 3a1, but the height h10 from the vicinity of the peripheral wall 3a1 to the peripheral wall 3a1. Is formed higher than the height h9 from the diagonal partition wall 3b to the vicinity of the peripheral wall 3a1. In the present embodiment, the triangular portion 3d2 is formed at the corner formed by the lower rib portion 3d1 and the peripheral wall 3a1 having a substantially constant height h9 from the diagonal partition wall 3b to the vicinity of the peripheral wall 3a1. Accordingly, the height h10 of the lower rib 3d from the vicinity of the peripheral wall 3a1 to the peripheral wall 3a1 is configured to be higher than the height h9 from the diagonal partition wall 3b to the vicinity of the peripheral wall 3a1.

As described above, when the synthetic resin pallet P is placed so as to straddle the shelves S, conveyors, etc. arranged at predetermined intervals, it is indicated by solid and broken circles in FIG. In particular, the portion C2 shown by the double solid line in FIG. 21, that is, the connecting portion between the central girder 3 and the connecting portion between the middle girder and the middle girder lower connecting beam 7 is shown. As described above, the height h10 from the vicinity of the peripheral wall 3a1 to the peripheral wall 3a1 of the lower rib 3d formed in the central girder 3 is set from the diagonal partition wall 3b to the vicinity of the peripheral wall 3a1 as described above. By forming the height higher than the height h9, deformation of the connecting portion between the central beam 3 and the intermediate beam / center beam lower connecting beam portion 7 can be prevented. Further, the lower rib 3d is substantially aligned with the central beam 7a and / or the inclined beam 7b forming the intermediate beam / center beam lower connection beam 7 for connecting the lower end of the intermediate beam 2 and the lower end of the center beam 3. It is preferable to form in a shape. By comprising in this way, a deformation | transformation of the connection part of the center girder 3 and a middle girder | midgirder / center girder lower connection crosspiece 7 can be prevented more reliably.

Further, the height h9 ′ of the upper rib portion 3c1 corresponding to the lower rib portion 3d1 having a substantially constant height h9 from the diagonal partition wall 3b of the lower rib 3d to the vicinity of the peripheral wall 3a1 is the height of the lower rib 3d. The lower rib portion 3d1 having a substantially constant height is formed lower than the height h9. By comprising in this way, a synthetic resin pallet can be reduced in weight effectively, without reducing the intensity | strength and rigidity of a synthetic resin pallet largely.

FIG. 1 is a perspective view of a synthetic resin pallet according to the present invention. FIG. 2 is a plan view of the synthetic resin pallet of the present invention. FIG. 3 is a rear perspective view of the synthetic resin pallet of the present invention. FIG. 4 is a back view of the synthetic resin pallet of the present invention. FIG. 5 is an enlarged perspective view of a corner beam constituting the synthetic resin pallet of the present invention and its vicinity. FIG. 6 is an enlarged back perspective view of a corner beam and its vicinity constituting the synthetic resin pallet of the present invention. FIG. 7 is an enlarged plan view of a corner beam and its vicinity constituting the synthetic resin pallet of the present invention. FIG. 8 is an enlarged back view of a corner beam and its vicinity constituting the synthetic resin pallet of the present invention. FIG. 9 is an enlarged perspective view of an intermediate beam constituting the synthetic resin pallet of the present invention and its vicinity. FIG. 10 is an enlarged rear perspective view of the intermediate beam constituting the synthetic resin pallet of the present invention and the vicinity thereof. FIG. 11 is an enlarged perspective view of the central beam constituting the synthetic resin pallet of the present invention and the vicinity thereof. FIG. 12 is a rear enlarged perspective view including a central girder constituting the synthetic resin pallet of the present invention and a partial cross section in the vicinity thereof. FIG. 13 is a partially enlarged plan view of the synthetic resin pallet of the present invention. FIG. 14 is a partially enlarged plan view including an intermediate girder and a central girder constituting the synthetic resin pallet of the present invention. FIG. 15 is a vertical cross-sectional view along the crosspiece connecting the corner beam and the intermediate beam, including the corner beam and the intermediate beam constituting the synthetic resin pallet of the present invention. FIG. 16 is a vertical cross-sectional view of a connecting beam that forms a beam portion that connects the intermediate beam and the central beam that constitute the synthetic resin pallet of the present invention. FIG. 17 is a vertical sectional view of another embodiment of the connecting bar shown in FIG. FIG. 18 is a partial perspective view of still another embodiment of the connecting bar shown in FIG. FIG. 19 is a partially enlarged back view of the synthetic resin pallet of the present invention. FIG. 20 is a vertical sectional view of a connecting beam that forms a beam portion that connects the intermediate beam and the central beam that constitute the synthetic resin pallet of the present invention. FIG. 21 is a front view of a synthetic resin pallet or the like for explaining problems of a conventional synthetic resin pallet.

Explanation of symbols

1 ... Corner Girder 2 ... Intermediate Girder 3 ... Center Girder 4 ·······································································································································・ ・ ・ ・ ・ ・ ・ ・ Intermediate girder / middle girder upper connecting beam 7 ・ ・ ・ ・ ・ ・ ・ ・ middle girder / middle girder lower connecting beam

Claims (6)

In the synthetic resin pallet having a corner girder arranged at the four corners of the synthetic resin pallet, an intermediate girder arranged in the middle part of the corner girder, and a central girder arranged in the central part of the synthetic resin pallet, A synthetic resin pallet characterized in that the connecting beam constituting the intermediate beam / center beam upper connecting beam portion connecting the upper end portion of the intermediate beam and the upper end portion of the center beam is made thick. 2. The synthetic resin pallet according to claim 1, wherein only the lower part of the connecting bar is thickened. 2. The synthetic resin pallet according to claim 1, wherein only a portion located on the intermediate beam side of the connecting bar is thickened. The lower end horizontal edge part extended in the direction of the said connection cross was formed in the lower end of the adjacent connection cross adjacent to the said intermediate | middle girder / center-girder upper connection cross part, The Claim 1 characterized by the above-mentioned. 2. A synthetic resin pallet described in item 1. 5. The connecting beam constituting the intermediate beam / center beam lower connecting beam portion connecting the lower end portion of the intermediate beam and the lower end portion of the center beam is made thick. 2. A synthetic resin pallet according to item 1. The pallet made of synthetic resin according to claim 5, wherein only a portion located on the side of the central beam of the connecting bar is thickened.

Images