DE202007003691U1 - Multi-part plastic pallet has upper and lower parts and sidewall with the upper and lower parts being free from milling lines - Google Patents

Abstract

A multi-part plastic pallet comprises an upper cover (4) part (2), a lower part (3) comprising runner (6) and foot (5) and a surrounding sidewall. The upper and lower parts are joined together and comprise a seam along the joint line and the pallet has a milling line along the sidewall. Either the upper or lower part is essentially free from a milling line.

Description

The Innovation relates to a pallet according to the preamble of the claim 1.

such Pallets are known from practice. When the deck is closed area such pallets are also called "closed Pallet ", that can be used there, where increased Requirements for hygienic conditions are made. Out economical reasons The pallets often have cavities on.

at the production of upper and lower parts require the used Materials and colors a shrinkage and / or a delay of manufactured parts. As a result, the top and bottom often do not close along their seam congruent to each other. To avoid disturbing edges and heels, a milling line is created along the seam on the side walls, the one flush transition from Upper part causes the lower part on the outer surface of the side wall. Although they are so disturbing Edge removed, but then the wall thickness of the side wall reduced and the sidewall thus mechanically weakened.

In In practice, the problem arises that in handling the pallet with the help of industrial trucks the forks or their individual prongs may not be correct to the entry openings aligned with the pallet so that there is a risk that the tines can be pushed against the seam of the pallet. In In this area, however, the pallet is due to the caused by the Fräslinie material weakening relatively sensitive, so that in such contacts undesirably large damage Kings can result in the pallet. Especially when a hole has been pushed into the side wall is through the opening of the Pallet cavity the pallet unusable from a hygienic point of view

Of the Innovation is the object of a generic pallet To improve that they can be produced as inexpensively as possible and as possible stable and against damage as possible through the tines of an industrial truck well protected is.

These Task is through a pallet with the features of the claim 1 solved.

The Innovation beats in other words, either the top or the bottom essentially free from the milling line to leave. "In the essential "means in the context of the present proposal that the seam itself, if they are z. B. is configured as an adhesive or weld and a outward forming protruding bead on the side wall of the pallet, in the milling line can lie, so that the proportion of the seam, which in itself the milling line free upper or lower part is to be removed by milling without departing from the present proposal.

Proposal accordingly can advantageous in each case the other, namely to be milled component of the pallet deliberately oversized its production become, so that a supernumerary Edge, if both components, ie the upper part and the lower part, together become. The ensuing milling remove the excess, protruding Edge of the oversized Component and, if desired if necessary, the welding or glue bead of the seam. The material thickness of the other, ungrastened component So remains as designed, so that a material weakening in avoided the side wall of the pallet and in particular in the seam is.

Advantageous can the seam from the outer peripheral edge the pallet offset towards the center, in particular from the outside top down to the middle. This will increase the stability of the pallet improved, because the mentioned Impact forces that by tines or an entire fork of an industrial vehicle with a lateral Push on the palette can act, burden the pallet and in particular its seam between upper and lower part not on shear. Rather, the interior supports where z. Ribs, fillers or reinforcing elements can be provided the margin at a horizontally directed towards the center of the pallet Kick off, so that the seam load is significantly reduced.

Different connection options between the upper and lower part are conceivable, so that these two parts can be welded or glued together, for example, or even clipped, so it can be locked. In particular, two types of connection can be used simultaneously, for example, first a latching and secondly a bonding or welding, so that a particularly reliable connection between the upper and lower part is guaranteed. The not only lying in a plane course of the seam requires the welding or gluing of the two upper and lower parts of the pallet increased attention or more complex manufacturing facilities. Surprisingly, however, it has been found that by the proposed achievable stability of the range, the production of the pallet can otherwise be done more economically, for example, by lower material thicknesses, so that the improved stability of the proposed range even in a economically manufacturable range is achievable.

Advantageous can be provided that the seam on the outer peripheral edge of the pallet about at height the top runs. Thus, economically advantageous upper part only rich in Be a comparatively thin one Plate, which forms the deck of the pallet, be dimensioned larger than the lower part. Accordingly, less material must be removed during milling and recycled as if a larger portion of the sidewall correspondingly oversized would be and subsequently milled away would have to be.

Advantageous the connection of the individual pallet parts is permanent executed so as non-releasable Connection. This improves the stability of the pallet. Especially if the unresolvable Connection tight is, for example, by gluing or welding the Pallet parts together, also the hygiene of the pallet will be advantageous influenced, since the penetration of liquids into cavities of the Pallet, or even the escape of gases from the cavities avoided can be.

Advantageous can on the deck or in the feet of the Pallet cavities be provided so that a particularly lightweight and material-saving, in turn, a particularly economically producible range can be created. The mentioned cavities are provided with stiffening elements by the foaming of the cavities or by material uniformly formed by the pallet parts ribs or formed by separate stiffening profiles, for example metal profiles are. The proposed pallets can advantageously have upper and lower parts made by injection molding are. This can be reasonably priced the pallets in big quantity produce.

Advantageous The pallet can be on its top, ie on the deck or on the underside, so below at least one runner, with a be provided slip-resistant covering, so that in the sense of an improved Load securing the pallet against unwanted sliding movements as well the cargo on the pallet is secured against unwanted slipping could be.

Advantageous can automate the collection of pallets or their transported Goods by it carried out so that the pallet can be detected electronically. For this can For example, the known per se transponder or RFID tags Find use. these can optimally against weather influences and protected against mechanical influences in the Pallet to be integrated, d. H. So either in a cavity of Pallet be provided there be glued, for example, or you can be injected into the pallet material.

On the deck can advantageous locks for the goods to be transported be attached. So can For example, Aufkantungen provided in the form of angles or points be, which the stable arrangement of transported on the pallet Support goods. So can for example outside around the edge of the pallet, a corresponding upstand or be provided with a correspondingly molded circumferential collar, which secures both the load on the pallet and the stacking supports several similar pallets by providing a stable Bond between these over each other creates pallets.

One embodiment a proposed range is explained in more detail below with reference to the purely schematic representations. It shows

1 to 3 Cross sections through a pallet according to the proposal during production, the upper and lower parts being located in three different arrangements relative to one another due to production engineering,

4 to 6 the 1 to 3 compared the respective pallet after generation of the milling line,

7 and 8th a prior art pallet, in two idealized views during manufacture and after completion, and

9 and 10 a prior art pallet, in two practical views during manufacture and after completion.

In the drawings is with 1 altogether a pallet designates the one as upper part 2 designated injection molded part and a lower part 3 having designated injection molded part. The top 2 forms a closed deck 4 the pallet 1 so that a hygienically closed pallet surface is achieved. Purely by way of example is an upward, circumferential upstand 11 at the edge of the deck 4 intended. feet 5 are arranged in a known per se and therefore not shown manner in three parallel rows, each with three feet 5 through longitudinal runners 6 connected to each other.

A seam 7 results from the separation points where the upper part 2 to the lower part 3 borders. As in 7 shown, the seam runs 7 in a manufactured according to the prior art range 1 on the outer circumference of the pallet 1 , in about half above the height of their side walls. The connection of the upper and lower parts 2 and 3 is done by welding, taking along the seam 7 gives a bead both on the inside and on the outside of the side wall. In order to remove this disturbing bead, it becomes according to 8th removed by a milling operation, so that there is a Fräslinie, which reduces the wall thickness of the side wall slightly and does not represent a problematic mechanical weakening of the side wall.

The 7 and 8th show an ideal state of a pallet according to the prior art. In practice, however, often results in an offset between the upper part 2 and the lower part 3 due to different shrinkage or distortion during the production of the respective parts. It can therefore happen that, as in the 9 and 10 shown, the side wall portions of the shell 2 and the lower part 3 not flush with each other. By the in 9 recognizable offset leads the introduction of the milling line to that in the lower part 3 a particularly strong lead is created, which in itself, however, does not have to be problematic. For example, the lower part 2 have the standardized dimensions, so that the lower part 3 With this clearly visible projection not impermissible dimensions. The problem, however, is that the side wall is considerably weakened in the milling line, since it has a significantly smaller wall thickness than intended there. For the regular treatment of the pallet 1 this does not necessarily mean a disadvantage. Will the palette 1 however, handled in an unintended manner, for example by moving from a certain height with a corner of the pallet 1 falling on a hard ground, or if an industrial truck accidentally does not fall into the entrance pockets of the pallet 1 but against the side wall of the pallet 1 is guided, in the area in which this material weakening, so the side wall can be damaged so that an opening to the pallet interior, ie in the cavity of the pallet 1 is created.

According to the proposal, the seam is from the middle region of the side wall up to the deck 4 of the top 2 shifted, like that 1 to 6 demonstrate: 1 shows here also an idealized representation, in which the upstand 11 exactly with the side wall of the base 3 flees. 4 shows the corresponding finished pallet: By creating a milling line is the protruding edge area 10 as well as the outer bead of the seam 7 away. The lower part 3 was therefore left free of a milling line, except for the minor part, namely where the bead of the seam 7 on the outside of the base 2 was present. Based on the entire cross-sectional area of the side wall, as far as the side wall of the lower part 3 is formed, this amount of material, the lower part 3 has been removed by the milling line, negligible. In particular, is off 4 recognizable that the wall thickness of the side wall at the bottom 3 it has not been noticeably reduced and, accordingly, the constructively provided stability of the pallet 1 is not affected by a reduction in sidewall thickness.

2 shows the basically same palette 1 as 1 , but in a practice typical first variant: By appropriate shrinkage is the top 2 smaller than in the idealized representation of the 1 failed, leaving the upstand 11 opposite the side wall of the base 3 is arranged offset inwards. The laterally protruding edge area 10 of the top 2 falls therefore opposite 1 correspondingly smaller.

Again, however, results after the milling an undiminished stability of the pallet 1 as based on 5 becomes clear: Although now lies the upstand 11 something from the outer edge area of the pallet 1 removed further inside, the mechanical stability in the area of the seam 7 and in particular the wall thickness of the side wall is as undisturbed as it is in the ideal conditions of the 1 and 4 the case is.

3 shows the same palette of 1 and 2 , but in a typical practice typical variant: The upper part 2 in this case is larger than the lower part 3 so that the upstand 11 opposite the side wall of the base 3 is offset to the outside and the edge area 10 of the upper part particularly far over the side wall of the lower part 3 protrudes.

6 shows this variant of the pallet 1 after the milling process: The milling line not only has the protruding edge area 10 removed, but also the wall thickness of the upstand 11 reduced. This is the stability of the pallet 1 not affected and in particular is the range 1 through this reduced wall strength of the upstand 11 not become sensitive to the unwanted generation of openings to the inner cavity of the pallet.

From a hygienic point of view is therefore the range 1 also in the practice typical dimensional variations, as the 2 and 5 such as 3 and 6 show just as beneficial as the ideal palette of 1 and 4 ,

On the outsides of the pallet 1 the seam runs 7 at the bottom of the deck 4 , Inside the pallet 1 however, the seam runs 7 deeper, namely where two ribs 8th and 9 abut each other and collide, leaving the seam 7 from the outer circumference of the pallet 1 to the middle of the Pa Latvian 1 going downhill. Ribs 8th be from the top 2 and the ribs 9 from the lower part 3 educated.

Claims (17)

Plastic multi-part pallet comprising a top forming an upper surface also called a deck, and a lower part forming runners and feet, and having a circumferential side wall, the upper and lower parts being joined together and seamed along their joining line, and along the pallet the side wall has a milling line, characterized in that either the upper part ( 2 ) or the lower part ( 3 ) is substantially free of the milling line. Pallet according to claim 1, characterized in that the cutting line extends over the seam ( 7 ). Pallet according to claim 1 or 2, characterized in that the seam ( 7 ) on the outer peripheral edge of the pallet ( 1 ) is higher than in the middle. Pallet according to one of the preceding claims, characterized in that the seam ( 7 ) on the outer peripheral edge of the pallet ( 1 ) at about the level of the deck ( 4 ) runs. Pallet according to one of the preceding claims, characterized in that the upper part ( 2 ) with the lower part ( 3 ) is welded. Pallet according to one of the preceding claims, characterized in that the upper part ( 2 ) with the lower part ( 3 ) is glued. Pallet according to one of the preceding claims, characterized in that the upper part ( 2 ) with the lower part ( 3 ) is locked. Pallet according to one of the preceding claims, characterized in that the deck ( 4 ) has at least one cavity and in the deck ( 4 ) Stiffening elements are provided. Pallet according to one of the preceding claims, characterized in that in the feet ( 5 ) formed cavities stiffening elements are provided. Pallet according to claim 8 or 9, characterized that the cavities are foamed. Pallet according to one of claims 8 to 10, characterized in that the upper part ( 2 ) and / or the lower part ( 3 ) Ribs ( 8th . 9 ), which extend into the cavities. Pallet according to one of claims 8 to 11, characterized that in the cavities Metal profiles are used. Pallet according to one of the preceding claims, characterized in that the upper part ( 2 ) and / or the lower part ( 3 ) is manufactured as an injection molded part. Pallet according to one of the preceding claims, characterized in that the deck ( 4 ) is provided with an anti-slip coating. Pallet according to one of the preceding claims, characterized in that the underside of at least one runner ( 6 ) is provided with an anti-slip coating. Pallet according to one of the preceding claims, characterized in that in the pallet ( 1 ) at least one also called RFID tag transponder is integrated. Pallet according to one of the preceding claims, characterized in that the deck ( 4 ) is designed as a closed surface.