WO2007118917A1

WO2007118917A1 - Cardboard pad for pallet

Info

Publication number: WO2007118917A1
Application number: PCT/ES2007/000229
Authority: WO
Inventors: Greger Norrby
Original assignee: Cartopal Packaging Systems, S.L.
Priority date: 2006-04-17
Filing date: 2007-04-16
Publication date: 2007-10-25
Also published as: EP1847466A3; EP1847466A2; CL2007001017U1; DE602007005182D1; ES1062739U; ES1062739Y; PT1847466E; EP1847466B1; ATE460348T1; ES2340624T3

Abstract

This is formed by means of a perimeter profile (3) surrounding a plurality of support blocks (2), to which it is joined by means of adhesive bonding, having preferably a 'C' or 'U' section, and, in its central branch (4), a number of transverse fold lines or scorings (5) that end in angular cuts or notches (7) in the flanges (6) of the perimeter profile (3). Additionally, it may have a reinforcement lining (13). Advantageously, the ends (11) (11´) of the perimeter profile (3) are joined on the central zone of one of the support blocks (2). The pads thus configured, arranged parallel to one another, are adhesively bonded to a loading platform (1) in order to form a pallet. In this way, the surface for adhesively bonding the pads to the loading platform (1) is considerably increased at the same time as the rigidity of the whole assembly is improved.

Description

PALLET CARTON

D E S C R I P C I Ó N

OBJECT OF THE INVENTION

The present invention relates to a cardboard skate for pallets of those participating in pallets as a means of supporting the platform thereof with respect to the ground, specifically pallets in which independent of the material used in said platform the skates are made of fiber of paper or cardboard, recycled or not recycled.

The object of the invention is to achieve skates capable of withstanding significant efforts, especially in terms of resistance to bending, without the deterioration of the skates themselves or the decoupling thereof with respect to the loading platform.

BACKGROUND OF THE INVENTION There is a wide variety of cardboard pallets, with large differences in terms of resistance and behavior. The cardboard pallets that are constructed as an integrated unit, that is, the skates are joined by the integral structure of the pallet, tend to be more stable but extremely inflexible in relation to sizes, which is why cardboard pallets are more frequent than they consist of alignments of individual skates, glued to an upper plate that constitutes the pallet loading platform, since these are much more versatile.

However, this second solution involves a certain risk of the uncoupling of any of the legs against a lateral effort suffered by them, such as dragging the pallet on the ground.

The applicant himself is the holder of the utility model ES 1 052 138 U, which describes a reinforcement for the legs of this type of pallets, reinforcement consisting of a ribbed profile, of section "U", lower extremity of each leg or each pallet leg alignment, improving considerably the mechanical resistance and the rigidity of the pallet as a whole. However, the utility model ES 1 052 138 U presents a series of weaknesses that this new invention intends to solve.

Frequently, the rough handling of the forklift causes damage to the support blocks, between the platform and the reinforcement described in the utility model ES 1 052 T38 U, when the fork of the truck incorrectly hits such blocks. An incident of this type can give off the block of the corresponding "U" profile and / or of the upper platform. An additional problem is that the area and the surface for gluing is reduced between the skate of the pallet and the upper platform, so that heavy and abrupt movements can separate the skate from the pallet of the platform.

It is also possible that by introducing a manual forklift, known as a pallet truck, in a pallet equipped with the reinforcements of said utility model, the lateral branches, that is to say the vertical walls of the "U" profile can be easily damaged by the wheels of the pallet truck In addition, the need to have blocks between the loading platform and the "U" reinforcement profile, prevent the use of this type of skates for the so-called pallet-media, which measure 800 or 600 millimeters, due to the lack of space for the fork of the truck or pallet truck.

DESCRIPTION OF THE INVENTION

The new cardboard skate for pallets that the invention proposes solves in a fully satisfactory manner the above-mentioned problem, that is, it stiffens very considerably the cardboard pallet skates, while also considerably increasing the fixing surface of the block to the perimeter structure or skate and from this to the platform itself.

To do this and more specifically, the cardboard pallet skate that is recommended contains the following components: (i) A "C" or preferably "U" profile, that is, a profile whose wings are less than or equal to the length of its base or middle branch, commonly referred to as a "U" profile, made on the basis of laminated cardboard, preferably single piece and perimeter that may incorporate angular cuts in its wings, preferably at 90 ^a , and in correspondence with these, two transverse grooves as folding lines that affect its middle branch, said profile being able to preferably define four or five sectors.

(ii) LJn, preferably lined with corrugated cardboard, honeycomb sheets or similar, of similar dimensions to the base or middle branch of the perimeter profile and adhered thereto by suitable fixing means, preferably by gluing or adhesive, sandwiched between the blocks in polypropylene arrangement or in single-piece arrangement with die-cut to fit the blocks.

(iii) Conventional support blocks, preferably hollow cylindricals that are sandwiched between the upper sector and the lower sector of the perimeter profile, preferably resting on the profile, that is, directly glued to the internal middle branches of the profile.

In this way, starting from an envelope or perimeter profile of section in "C" or preferably in "U", made of laminated cardboard, and preferably single piece, they are arranged, in order to obtain a perimetric structure, a series of slits or transverse folding lines that will allow folding of the assembly, being arranged in correspondence with these grooves two angular cuts, preferably at 90 °, so that once the assembly is folded and the perimeter structure is formed, the cut surface is aligned and come into contact. of the branch or wing of one sector with that of another.

Additionally, a lining that can cover the internal base of the profile can be incorporated. This lining will preferably be cardboard corrugated, honeycomb plates or the like, adhered to the perimeter profile preferably by adhesive glue. In the cases in which the lining is single piece, angular cuts will be arranged to facilitate its folding and subsequent assembly and in correspondence with the grooves and cuts of the perimeter profile and may be stamped to accommodate the blocks. In cases where the lining is not single piece, it will be sandwiched between the blocks. With this lining it is intended to prevent the wheels of a pallet truck from breaking the vertical walls or wings of the profile and that they are not damaged by lifting the pallet with the pallet truck or trucks. Both the formation of slits or fold line and the angular cuts may be performed once the perimeter profile and lining assembly is assembled or separately.

Once the crevices or folding lines are arranged according to the final structure designed or designated, one or more support blocks corresponding to the structure on one of the sectors will be placed and glued, in particular the lower support blocks are fixed in profile. U preferably by adhesive glue in the angular cut of the U profile and in its lining. Then, the final structure will be closed and shaped. The remaining sector will preferably be located on one of the blocks, either a side block or a central block, so as to give greater consistency to the joint.

DESCRIPTION OF THE DRAWINGS

To complement the description that is being made, and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical implementation thereof, a set of drawings is accompanied as an integral part of said description. where, for illustrative and non-limiting purposes, the following has been represented: Figure 1, - Shows a schematic representation on the lower floor of a skate with a single support block and the reinforcement corresponding to the utility model ES 10520138U, in which a hit with the fork of the truck for heavy and sudden movements may separate the skate from the pallet of the platform. Figure 2.- Shows a schematic representation in plan bottom of a conventional pallet provided with three longitudinal alignments of support blocks, with three blocks in each alignment. The contact surface for gluing between the support block and the platform is reduced to the surface of the block itself and, therefore, the fixing of the skate to the platform could fail due to heavy and abrupt movements.

Figure 3.- It shows a "U" profile in which the folding lines or slits and the cuts are arranged at the points where it will be folded to form the perimeter envelope structure. Thanks to the lines and folding or crevices, any click of the area to be folded will be avoided.

Figure 4.- Shows, again, the "U" profile, according to figure 3, with the lining incorporated within the middle branch of the profile. With this lining it is intended to avoid that the wheels of a pallet truck break the vertical walls or wings of the profile and that they are not damaged by lifting the pallet with the pallet truck or trucks.

Figure 5.- Shows, according to a perspective view, a skate provided for large pallets, such as 800 x 1200 mm. or 10Ox 1200 mm. , carried out in accordance with the object of the present invention.

Figure 6 - Shows, again, the skate before closing and forming the perimeter structure and the end point of the "U" profile on one of the blocks is appreciated.

Figure 7.- Shows a skate with the perimeter structure pallets of smaller size, such as 800 x 600 mm. On the sides there are no support blocks due to lack of space, but thanks to the resistance of the U profile in a vertical position, it assumes the function of the side blocks.

Figure 8.- Shows a schematic representation on the lower floor of the arrangement of the new skates and how the contact surface for gluing between the skate and the platform increases with the perimeter structure of the skate. This increase in contact surface of gluing guarantees a much higher fixation of the skate to the platform.

PREFERRED EMBODIMENT OF THE INVENTION As it has just been said, Figure 2 has presented a Conventional cardboard pallet in which a loading platform (1) participates on whose underside are fixed a plurality of support blocks (2), binoculars that can form two, three or more preferably parallel alignments, of one, two, three or more units each and that constitute the distance means of said loading platform

(1) with respect to the ground, in order to allow passage between said blocks

(2) of the fork of a forklift or similar.

Well, according to the invention, the cardboard skate for pallets that is recommended is constituted by a combination of one or several support blocks (2) and a perimeter profile (3) of laminated cardboard, which adopts a configuration in "C" or preferably "U", in whose middle branch (4) crevices or folding lines (5) are established, the lateral branches (6) of said corrugated perimeter profile (3) being provided, corresponding to the ends of each folding line (5), of recesses or angular cuts, preferably at 90 ° (7), which allow the corrugated and rectilinear perimeter profile of Figure 2 to be transformed into a perimeter perimeter structure.

Preferably, the embodiment of Figures 3 and 4, in

Ia that a profile in "C" or "U" (3) preferably single piece, similar to the previous one, is sized to simultaneously embrace one, two three or more support blocks (2) that form the skate that is recommended, of in such a way that in the event that the skate is constituted by a single block it will be located in the center of the formed skate itself, in the event that the skate constituted by two blocks, these will be located at the ends of the skate itself, in the assumption that the skate consists of three blocks, these will be located two at the ends and one in the center and in the cases of having more than three blocks these will preferably be located with two blocks at the ends of the skate and the rest distributed at equal distances from each other.

The perimeter profile "C" or "U" (3) may be constituted preferably by one piece, being able to configure two or more pieces that will join either in any of the vertices (10) of the set, or on the extreme blocks (12) and (12 ') or in the middle zone side of these blocks.

Additionally, a liner (13) may be incorporated, which may cover the internal base of the profile (4) in "C" or "U". This lining will preferably be of corrugated cardboard, honeycomb sheets or the like, adhered to the perimeter profile preferably by adhesive glue. In the cases in which the lining is single piece, angular cuts will also be arranged to facilitate folding and subsequent assembly and in correspondence with the grooves and cuts of the perimeter profile and die-cut areas where the corresponding blocks will fit. In the cases in which the lining is not single-piece, this will be placed in the sections between blocks, just in the area where it is provided that between the wheels and / or skates of the pallet truck or truck and the surface covering the lifting fork .

In the preferred embodiment of the invention, it is provided that the perimeter perimeter profile (3) is preferably closed over the upper middle area of no of the blocks (2), as shown in Figures 3 and 4, so that in said profile corrugated (3) instead of having four transverse folding lines (5) that determine four layered sectors, there are four folding lines that determine five sectors, as can also be seen in the cited figures 6 and 7.

Claims

1.- Cardboard skate for pallets, of the type that materialize in a perimetric structure, one or several support blocks, is characterized in that using said support block as a core incorporates a perimeter profile, preferably a single-piece section of section in "C "or preferably in" U "of laminated cardboard, with wings preferably between 10 and 20 mm. in length, in which a series of transverse creases or folding lines are defined that affect its middle base, and that in correspondence with these grooves, angular cuts, preferably at 90 ^to -, are established on its vertical walls or wings, and that Once folded and glued with one or several support blocks, this perimeter profile is formed in an enveloping structure in which one, two, three or more support blocks are perfectly integrated and embraced, the lower outer face of the perimeter profile being support means of the skate on the ground, and the upper outer face facing and glued with the loading platform, thus achieving a notable stiffening of the skate.

2.- Cardboard skate for pallets, of the type that materialize in a perimetric structure, one or several support blocks, according to previous claim, is characterized in that, the union of the ends of the perimeter profile, on skates of two or more blocks, it will preferably be located in the upper lateral area of the skate itself so that this joint can rest and be glued to the support block located on one of the inner sides of the perimeter perimeter profile.

3. Cardboard skate for pallets, of the type that materialize in a perimeter structure, one or more support blocks, according to previous claims, is characterized in that the union of the ends of the perimeter profile, on skates of one or more blocks , it will preferably be located in the upper central area of the skate itself so that this joint can rest and be glued to the support block located in the center of the surrounding perimeter profile itself.

4. Cardboard skate. For pallets, of the type that materialize in a perimeter structure, one or several blocks of support, according to previous claims, is characterized in that, additionally, it may be incorporated internally of the "C" or "U" profile, adhered to the perimeter profile preferably by means of adhesive glue that may incorporate slits or fold lines with their corresponding cuts angular to facilitate folding and subsequent assembly and in correspondence with the grooves and cuts of the perimeter profile, with a thickness preferably equal to the height of the wings of the perimeter profile.

5.- Cardboard skate for pallets, of the type that materialize in a perimeter structure, one or more prismatic support blocks, according to previous claims, is characterized in that five sectors determined by four slits or lines are preferably defined in said profile of folding, in which the first and the last sector will comprise the ends of the perimeter profile, which will be joined later, whose length once joined will be the same as the intermediate sector of the profile, and whose interior width will preferably coincide with the width of the or of the support blocks in such a way that there is a perfect fit and gluing of these blocks inside the perimeter profile.

6.- Cardboard skate for pallets, of the type that materialize in a perimeter structure, one or more prismatic load bearing blocks, according to previous claims, characterized in that, in said profile four sectors determined by four slits are defined or folding lines, whose point of attachment will be located in any of the vertices of the structure, preferably in the upper ones, whose interior width will preferably be coincident with the width of the support block (s) in such a way that a fitting and Perfect gluing of these blocks inside the perimeter profile.