JP4334110B2 - Plastic pallet - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin pallet used for transportation, storage, etc. of articles, and more particularly to a synthetic resin pallet suitable for loading on a cargo bed of a vehicle such as a freight car or a truck.
[0002]
[Prior art]
Conventionally, after inserting a fork of a forklift into a fork insertion port of a synthetic resin pallet on which an article is placed, lifting the synthetic resin pallet and placing it on a loading platform of a vehicle such as a freight car or a truck, the synthetic resin pallet Pull out the fork from the fork insertion port, then press the tip of the fork against the ribs formed on the side of the synthetic resin pallet placed on the loading platform and the lower surface of the upper deck of the synthetic resin pallet, and A synthetic resin pallet suitable for transferring a synthetic resin pallet in which the pallet is pushed by a fork and moved to place the synthetic resin pallet at a desired position on the loading platform is known.
[0003]
[Problems to be solved by the invention]
In the conventional synthetic resin pallet described above, the ribs on the lower surface of the upper deck with which the tip of the fork abuts are not strong enough, and thus there are problems such as cracks running on the ribs and breakage. In addition, there is also known that a reinforcing triangular rib is formed on the back of the rib on the lower surface of the upper deck with which the tip of the fork abuts, but simply by forming such a reinforcing triangular rib However, the strength of the ribs was not sufficient, and there were still problems such as cracks running on the ribs and breakage.
[0004]
In addition, it is difficult to identify where the rib on the lower surface of the upper deck with which the tip of the fork is abutted, so there was a problem that the fork was inserted in the wrong position and the plastic pallet was damaged. .
[0005]
An object of the present invention is to solve the problems of the above-described conventional synthetic resin pallet.
[0006]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention firstly has a lower inter-girder connecting rib in a substantially central region between the corner beam portion and the intermediate beam portion on the lower surface of the upper deck board. Similarly, a fork-contacting inter-girder connecting rib higher than the low inter-girder connecting rib is formed by forming a low rib region consisting of low-interstitial orthogonal ribs having a low height, and a low girder is also provided. at both ends between the connecting ribs, the Sumiketa portion and the intermediate girder is obtained by forming an inclined portion extending to the lower end direction of the nearest digit between the orthogonal ribs, respectively, in the second, most of the peripheral wall A distant inter-girder connecting rib, a fork-contacting inter-girder connecting rib adjacent to the peripheral wall side with respect to the inter-girder connecting rib, and an inter-girder orthogonal rib closest to each of the corner and intermediate girders In the space to be formed, the parallel ribs are connected to the inter-girder connecting rib and the inter-girder orthogonal rib. By forming the ribs, which were provided with compartments which are finely partitioned, the third, fork abutment interdigit connecting rib, than other ribs, which formed a thick, Fourth , a fork insertion position can be confirmed on the peripheral wall of the upper deck board over a width substantially corresponding to the low rib region. A buffer block is disposed in a compartment located on the opening side of the fork insertion opening of the connecting rib.
[0007]
【Example】
First, the overall configuration of a synthetic resin pallet (hereinafter also simply referred to as a pallet) of the present invention as an example will be described with reference to FIGS. 1 and 2.
[0008]
The pallet is made of synthetic resin, and is formed by welding the upper skid S1 and the lower skid S2, which are semi-finished products that are integrally formed, at the girder. The upper skid S1 having a square planar shape has a corner girder portion 1a 'formed at the four corners, an intermediate girder portion 1b' formed at the middle of the corner girder portion 1a ', and a central girder portion formed at the center portion. Similarly, the lower skid S2 having a square 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 The pallets are formed by welding the end surfaces of the parts to each other.
[0009]
The pallet formed as described above includes an upper deck board p1 and a lower deck board p2, a cylindrical corner beam 1a composed of corner beam portions 1a ′ and 1a ″ formed at four corners, and a middle portion of the corner beam 1a. A cylindrical intermediate girder 1b composed of intermediate girder parts 1b 'and 1b''formed in a cylindrical girder composed of a central girder part (not shown) and a corner girder 1a A fork insertion slot p3 into which a fork of a forklift can be inserted is formed between the intermediate beam 1b and between the intermediate beam 1b and the central beam.
[0010]
On the lower surface of the upper deck board p1 positioned between the corner beam 1a and the intermediate beam 1b, a plurality of inter-beam connecting ribs 2 for connecting the corner beam 1a 'and the intermediate beam 1b', A plurality of orthogonal ribs 3 that are 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, a plurality of cross ribs 6a running vertically and horizontally also on the lower surface of the upper deck board p1 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'. 6b are suspended.
[0011]
Next, mainly using FIGS. 3 to 5, the inter-girder connecting rib 2 and the inter-girder orthogonal rib 3 formed on the lower surface of the upper deck board p <b> 1 positioned between the corner beam portion 1 a ′ and the intermediate beam portion 1 b ′. A more specific configuration will be described.
[0012]
As described above, on the lower surface of the upper deck board p1 located between the corner beam 1a and the intermediate beam 1b, a plurality of inter-beam connecting ribs 2 for connecting the corner beam portion 1a 'and the intermediate beam portion 1b', and the beam A plurality of inter-digit orthogonal ribs 3 orthogonal to the inter-connecting ribs 2 are provided so as to cross each other, but in this embodiment, the inter-digit connecting ribs 2a closest to the peripheral wall p1a of the upper deck board p1. And the inter-girder connecting rib 2c adjacent to the peripheral wall p1a side with respect to the inter-girder connecting rib 2b farthest from the peripheral wall p1a, the corner girder part 1a ', and the intermediate girder part 1b', respectively. The height of the inter-girder connecting rib 2 and the inter-girder orthogonal rib 3 positioned between the ribs 3a and 3b (the distance from the lower surface of the upper deck board p1 to the lower ends of the inter-girder connecting rib 2 and the inter-girder orthogonal rib 3). These are formed lower than the other inter-girder connecting ribs 2 and the inter-girder orthogonal ribs 3. Hereinafter, the inter-girder connecting ribs 2 formed low will be referred to as inter-girder connecting low ribs 2 and denoted by reference numeral 2d. In addition, it is referred to as an inter-digit orthogonal low rib and is denoted by reference numeral 3c. In this embodiment, as an example, an example in which two inter-girder connecting low ribs 2d and two inter-girder orthogonal low ribs 3c are formed is shown.
[0013]
As described above, the lower inter-girder connecting low ribs 2d and the inter-girder orthogonal low ribs 3c are formed in a substantially central region between the corner beam portion 1a 'and the intermediate beam portion 1b' on the lower surface of the upper deck board p1. Are formed to form a low rib area C composed of the low-girder connecting low ribs 2d and the inter-beam crossing low ribs 3c. By forming such a low rib area C, the fork F An inter-girder connecting rib 2c (hereinafter, this inter-girder connecting rib is referred to as a fork contacting inter-girder connecting rib) is formed. As described above, the low rib region C composed of the low inter-girder connection low rib 2d and the inter-beam orthogonal low rib 3c is formed on the peripheral wall p1a side of the upper deck board p1 of the fork contact inter-girder connection rib 2c. By doing so, the front end f1 of the fork F can be reliably brought into contact with the fork contacting inter-girder connecting rib 2c, and therefore the workability of the work of transferring the article to the desired position of the loading platform is improved. In this embodiment, at both ends of the inter-girder connecting low rib 2d, the corner girder portion 1a 'and the intermediate girder portion 1b' extend in the direction of the lower end of the inter-digit orthogonal ribs 3a, 3b, respectively. When the tip portion of the inserted fork F is in contact with the slope portion 2d ′, the tip portion of the inserted fork F is formed along the slope portion 2d ′. Is configured to be guided to the center of the low rib region C.
[0014]
7 is between the peripheral wall p1a of the upper deck board p1 and the inter-girder connection rib 2a closest to the peripheral wall p1a, and is orthogonal to the peripheral wall p1a and the inter-girder connection rib 2a, and from the peripheral wall p1a to the inter-girder connection rib 2a. It is the downward inclination rib which inclined below toward the direction. By forming the downward inclined rib 7 as described above, even when the front end f1 of the fork F comes into contact with the downward inclined rib 7 when the fork F is inserted into the fork insertion port p3, the front end of the fork F is also provided. f1 is guided along the downward inclined rib 7 to the fork insertion port p3, and the fork F can be smoothly inserted into the fork insertion port p3.
[0015]
The inter-girder connection rib 2b farthest from the peripheral wall p1a, the fork contact inter-girder connection rib 2c adjacent to the inter-girder connection rib 2b on the side of the peripheral wall p1a, the corner beam part 1a 'and the intermediate beam part 1b' In addition, in the space D formed by the nearest inter-spar orthogonal ribs 3a and 3b, the partition ribs 8a and 8b partitioning the space D are respectively connected to the inter-girder connecting ribs 2b and 2c and the inter-spar It is formed in parallel to the orthogonal ribs 3a and 3b. In this way, the space D behind the fork contacting inter-girder connecting rib 2c (close to the inside of the pallet) is finely divided by the partition ribs 8a and 8b, so that the fork contacting inter-girder connecting rib 2c is reinforced. Therefore, when the front end f1 of the fork F comes into contact with the fork F, it is possible to solve problems such as cracking or breakage of the fork contact connecting rib 2c.
[0016]
9 is a recess formed in the peripheral wall p1a of the upper deck board p1 over a width substantially corresponding to the above-described low rib region C. By forming such a recess 9, confirmation of the fork insertion position can be performed. Therefore, it is possible to prevent the pallet from being damaged due to the fork F being inserted in the wrong position.
[0017]
In the embodiment shown in FIG. 6, in order to further increase the strength of the fork abutment inter-spar connecting rib 2c of the above-described embodiment, the thickness of the fork abutting inter-girder connecting rib 2c is increased. is there. In this way, by increasing the thickness of the fork contacting inter-girder connecting rib 2c, damage to the fork contacting inter-spar connecting rib 2c can be prevented more reliably.
[0018]
The embodiment shown in FIG. 7 and FIG. 8 is the compartment 10 located on the opening p3 ′ side of the fork insertion port p3 of the fork contact inter-girder connecting rib 2c in the above-described embodiment, in other words, the fork Inter-girder connecting rib 2c, inter-girder connecting low rib 2d located on the opening p3 'side of the fork insertion port p3, and inter-digit orthogonal rib 3a closest to the corner beam portion 1a' and the intermediate beam portion 1b ' 3b and a buffer block 11 formed of rubber or soft synthetic resin is disposed in the compartment 10 surrounded by the inter-beam orthogonal low rib 3c. The thickness of the buffer block 11 is formed to be substantially the same as the height of the inter-beam connecting low rib 2d and the inter-beam crossing low rib 3c. In this embodiment, the buffer block 11 is disposed in the compartment 10 by fitting the projection 11a formed on the buffer block 11 into the through hole p4 formed in the upper deck board p1. Although an example is shown, it can also be attached using an appropriate adhesive without forming such a protrusion 11a. In addition, the buffer block 11 can also be arrange | positioned in all the compartments 10 located in the opening p3 'side of the fork insertion port p3 of the fork contact | connecting inter-girder connection rib 2c in an Example.
[0019]
As described above, by providing the buffer block 11 in the compartment 10 located on the side of the opening p3 ′ of the fork insertion port p3 of the fork contact inter-girder connection rib 2c, the fork contact inter-girder connection rib 2c prevents the upper deck board p1 from being damaged by the buffering action of the buffer block 11 even if the front end f1 of the fork F accidentally collides with the upper deck board p1. can do.
[0020]
In the above-described embodiment, the inter-girder connecting rib 2c adjacent to the peripheral wall p1a side with respect to the inter-girder connecting rib 2b farthest from the peripheral wall p1a of the upper deck board p1 is an inter-girder connecting rib for fork contact. However, the inter-girder connecting rib 2b at an appropriate position may be used as a fork contacting inter-girder connecting rib. Further, between the corner beam portion 1a "and the intermediate beam portion 1b" of the lower deck board p2, the fork contact beam connecting rib 2c as described above, the partition ribs 8a and 8b for partitioning the space portion D, and the like are formed. You can also
[0021]
In the above-described embodiment, by forming the low rib region C, the fork abutting inter-girder connecting rib 2c with which the front end f1 of the fork F can abut is formed at the fork insertion port p3 in two opposite directions. In this example, the fork abutment inter-girder connecting rib 2c can be formed in the other opposite fork insertion port p3 in two directions.
[0022]
Further, by narrowing the rib interval of the inter-beam connecting low ribs 2d formed in the low rib region C and the rib interval of the inter-beam crossing low ribs 3c, a large number of inter-beam connecting low ribs 2d and inter-beam crossing low ribs 3c are formed. By forming, the rigidity of the low rib area C can be increased. By narrowing the rib interval in this way, it is possible to compensate for the rigidity of the low rib region C that decreases due to the low ribs.
[0023]
【The invention's effect】
Since the present invention has the above-described configuration, the following effects can be achieved.
[0024]
A low rib region is formed in the substantially central region between the corner beam portion and the intermediate beam portion on the lower surface of the upper deck board, which is composed of a low height inter-girder connecting rib and a low height inter-girder orthogonal rib. As a result, the fork abutment inter-girder connection rib is formed higher than the low inter-girder connection rib and the inter-girder orthogonal rib. Therefore, the workability of the work of transferring the article to the desired position of the loading platform is improved.
[0025]
Since the partition chamber partitioned by the partition rib is arranged behind the connecting rib between the fork contacting beams, the connecting rib between the fork contacting beams is reinforced, and therefore, when the tip of the fork contacts, It is possible to solve the problem that the fork-contacting girder connecting rib is cracked or broken.
[0026]
Since the connecting ribs for fork contact are made thicker than the other ribs, the connecting ribs for fork contacts are further reinforced. It can prevent more reliably.
[0027]
Since the concave portion was formed in the peripheral wall of the upper deck board over the width corresponding to the low rib area, the fork insertion position can be confirmed, so the fork is inserted in the wrong position and the pallet is damaged. You can prevent it.
[0028]
Since the buffer block is installed in the compartment located on the opening side of the fork insertion opening of the fork contact beam connecting ribs, the fork contact between the fork contact beam connecting ribs may be mistaken. Even if the tip of the fork collides with the upper deck board, the upper deck board can be prevented from being damaged by the buffering action of the buffer block.
[Brief description of the drawings]
FIG. 1 is a perspective view of a synthetic resin pallet according to the present invention.
FIG. 2 is a perspective view of the upper skid constituting the synthetic resin pallet of the present invention as seen from the lower surface.
FIG. 3 is a partial perspective view seen from the bottom surface of the upper skid constituting the synthetic resin pallet of the present invention.
FIG. 4 is a partial vertical cross-sectional view of an intermediate portion between a corner beam and an intermediate beam of the synthetic resin pallet of the present invention.
FIG. 5 is a back view of the vicinity of a corner beam and a middle beam of the synthetic resin pallet of the present invention.
FIG. 6 is a back view of the vicinity of a corner beam and an intermediate beam of a synthetic resin pallet according to another embodiment of the present invention.
FIG. 7 is a partial perspective view seen from the bottom surface of the upper skid constituting the synthetic resin pallet of still another embodiment of the present invention.
8 is a partial vertical cross-sectional view of an intermediate portion between a corner beam and an intermediate beam of the synthetic resin pallet shown in FIG. 7. FIG.
[Explanation of symbols]
p1 ... upper deck board p2 ... lower deck board 2 ... girders Inter-connecting rib 2c ············· Inter-digit connecting rib 3 for fork contact ········· Rub rib 9 ·································· ......

Claims (5)

A low rib region is formed in the substantially central region between the corner beam portion and the intermediate beam portion on the lower surface of the upper deck board, which is composed of a low height inter-girder connecting rib and a low height inter-girder orthogonal rib. By forming a connecting rib for fork abutment that is higher than the connecting ribs with a low height, and at both ends of the connecting ribs with a low height, a corner girder part and an intermediate girder part, A synthetic resin pallet characterized in that an inclined portion extending in the direction of the lower end of the nearest inter-spar orthogonal rib is formed . The inter-girder connecting rib farthest from the peripheral wall, the inter-girder connecting rib adjacent to the peripheral wall side with respect to the inter-girder connecting rib, and the nearest girder in the corner and intermediate girder parts, respectively. In the space formed by the orthogonal ribs, the partition ribs that are finely partitioned are arranged by forming parallel partition ribs in the inter-girder connecting ribs and the inter-spar orthogonal ribs, respectively. The synthetic resin pallet according to claim 1. The synthetic resin pallet according to claim 1 or 2, wherein the fork contacting inter-girder connecting rib is formed to be thicker than other ribs. The recessed part which can confirm a fork insertion position is formed in the surrounding wall of an upper deck board over the width | variety substantially equivalent to a low rib area | region, The Claim 1 characterized by the above-mentioned. Synthetic resin pallet. The synthetic resin according to any one of claims 1 to 4, wherein a buffer block is disposed in a compartment located on the opening side of the fork insertion opening of the connecting rib for fork contact. Made pallet.

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