DE102009008277A1 - Plastic pallet with reinforced runner - Google Patents

Abstract

The invention relates to a plastic pallet consisting of a deck, protruding from the deck, downwardly directed feet of an impact resistant material and located at the bottom of the feet, the feet interconnecting runners, the pallet separately manufactured runners from another, preferably stiffer, has material, the skids have an integrally molded hollow chamber profile with inner stiffening ribs, the runners in the receiving ribs are positively and releasably connected to the pallet feet and in this area have at least one corresponding undercut and the undercuts of the pallet skids are shaped so that the pallet skids solve at a vertical pressure load from above the pallet skids from the determined shaped projections of the pallet feet, without damaging the undercuts of the pallet skids and / or the protrusions of the pallet feet.

Description

The invention relates to a plastic pallet for reusable use in in-house and inter-company goods transport. Such pallets consist essentially of a cargo area having pallet deck and located on the pallet deck, downwardly directed feet and are made by injection molding of a polymer or lower requirements of a regenerated plastic or a plastic mixture. In addition, the undersides of the feet can be connected by plastic runners with each other, so that entry openings are formed for the tines of industrial trucks. A generic pallet is for example in the EP 1076011 B1 described.

At the In-house transport will be skid-covered plastic pallets transported by industrial trucks and / or roller and chain conveyors, the pallet being in one piece in a very common form produced with directly molded runners.

to Production of corresponding one-piece plastic pallets are usually relatively "soft" plastics or plastic blends used to high impact resistance to achieve the overall range. This will naturally the Stability of the skid reduced. When transporting loaded Pallets on roller and chain conveyors can Conveyor lines be sized so that the roles or chains not below the massive and relatively stable feet but in the area of relatively thin runners. The weight of the load makes the pallet skid at this point bent upwards, whereby the load can slip from the pallet and the pallet can no longer be conveyed due to the deformation is, and thus becomes unusable.

It is very beneficial when the pallet, especially in the field Pallet decks and pallet feet, a high Having impact resistance. This makes the pallet less sensitive against damage by tines of industrial trucks and falling objects or a fall from the high bay to a pallet corner. When transporting the pallets with industrial trucks it can happen that the tines not properly in the designated entry holes retract, but the pallet in the range of the pallet foot or of the pallet deck. Due to the high impact resistance of the material ensures that the pallet foot or the pallet deck is not damaged and the pallet can still be used.

to Improving the stability are the runners of plastic pallets strengthened by steel inserts. However, steel inserts are very detrimental to the recycling of plastic pallets, since they have to be removed beforehand.

Around to increase the stability of the pallet skid All or part of the pallets are made of materials have a high flexural rigidity and partially reinforced with fibers are. It is Z. As a palette known that a deck of an impact resistant Material and feet and skids made of a rigid Material possesses, whereby the feet are solvable or undetachably connected to the deck. However, reduced the impact strength increases with increasing flexural strength of the plastic material, so that the pallet is not resistant to Shock loads is, and thus only a short life in the "rough" work has.

Of the Invention is based on the object, a recycle-capable Plastic pallet of the type described in more detail designed so that the pallet deck and the pallet feet made of a "soft", impact-resistant material and the runners the highest possible stiffness exhibit. In addition, the runners are to be solvable be connected to the pallet body and without tools and easily detached from the pallet body without much effort can be as soon as a vertical compressive force on the Pallet skid works.

These The object is achieved according to the invention by a Claim 1 trained pallet solved.

The Subclaims include advantageous and expedient Further developments of the invention.

• • die Palette besitzt separat gefertigte Kufen aus einem anderen, vorzugsweise steiferen, Material,
• • die Kufen weisen ein einstückig gespritztes Hohlkammerprofil mit inneren Versteifungsrippen auf,
• • die Kufen sind im Bereich der Aufnahme-Stege formschlüssig und lösbar mit den Palettenfüßen verbunden und weisen in diesem Bereich mindestens einen entsprechenden Hinterschnitt auf und
• • die Hinterschnitte der Palettenkufen sind so ausgeformt, dass die Palettenkufen sich bei einer vertikalen Druckbelastung von oben auf die Palettenkufen aus den speziell ausgeformten Vorsprüngen der Palettenfüße lösen, ohne dass die Hinterschnitte der Palettenkufen und/oder die Vorsprünge der Palettenfüße beschädigt werden.

The object is achieved by a plastic pallet consisting of a deck, protruding from the deck and down facing feet of an impact-resistant material and located at the bottom of the feet, the feet interconnecting runners, comprising the following features:

• The pallet has separately manufactured skids made of another, preferably stiffer, material,
• The runners have an integrally molded hollow chamber profile with inner reinforcing ribs,
• • The runners are in the area of the receiving webs form-fitting and releasably connected to the pallet feet and have in this area at least one corresponding undercut and
• • The undercuts of the pallet runners are shaped so that the pallet runners release themselves from the specially shaped protrusions of the pallet feet when the pallet runners are pressed vertically from above, without damaging the undercuts of the pallet runners and / or the protrusions of the pallet feet.

Of the Pallet body made of an impact-resistant plastic material, z. As PE or PP, has projecting from the deck and down directed feet inside a cavity and have at the bottom receiving openings. The pallet For example, has nine feet, for example arranged in three rows at equal distances from each other are. The sample pallet contains three pallet feet each connected by a runner. The invention can also be applied to Pallets with a different foot count are applied. In certain applications, only certain feet, advantageous the outer feet, over Skids connected with each other. Can be useful the feet inside at least a partial ribbing exhibit. The feet have an approximate quadrangular cross-section. The outer feet can be compared to the middle feet have a smaller thickness. At least in the lower area the outer feet on at least one of its broad sides, preferably the outer one Broad side, specially shaped projections on the inner surface, which are dimensioned so that at least one corresponding surface the upturned footrests of skids with them latched and a positive connection between pallet feet and pallet skids is created.

These Corresponding surface can be advantageous as an undercut be executed.

The Skids are made separately from a composite that is as rigid as possible, z. B. PP with a certain glass fiber content, manufactured, wherein the composite of the same base polymer as the base material of the pallet body. This is especially advantageous for the recycling of the complete range, as the runners not separated from the pallet body and disposed of separately Need to become.

The Skid is as a one-piece molded hollow chamber profile with stiffening ribs inside and a closed upper and bottom executed. By the chosen Geometry is possible with minimal use of materials maximum bending stiffness. The achievable runner stability is comparable to that which is achieved by a corresponding skid made of solid material.

The Hollow chamber profile of the pallet skid is dimensioned so that it is in the range the openings completely and positively from the outsides of the outer feet the pallet body is covered so that no Pollution and can not collect water in the hollow chambers.

For the empty transport of the pallets, d. H. a stack of pallets is stacked transported without cargo, it must be ensured that the pallets do not slip off each other. This can advantageously ensured thereby Be sure the deck of the plastic pallet is at least two Points on which the runners of the pallet above standing, not protruding from the upper surfaces Have profilings. To better lock the above It can be advantageous for the standing pallet to be achieved Skids also with opposite the lower surfaces not above profilings are equipped, so that the Profiles when stacking unladen plastic pallets interlock positively. In other words, can it be beneficial for this purpose that the closed Bottom of the pallet skid at least partially with profilings is equipped, but not down over the stand out, planed areas of the skid base. Transporting on roller and chain conveyors is continue to be given. Also, these profiles make the readability the button installed on roller conveyors to query the pallets are in the area of the underside of the pallet skid, not impaired. It can also be provided that the areas that are queried by a button, no profiling exhibit. By profiling is also the slip resistance the range on roller and chain conveyors increased.

If a pallet produced according to claim 1 with an industrial truck to be transported, and the wheels of the truck are exactly on the pallet skids, the pallet is not at Lifting operation pressed apart by means of the lifting force, and can not be used due to the permanent deformation but the runners detach from a certain vertical pressure load independently and without damage the specially shaped protrusions of the pallet feet. The very rigid pallet skids are very advantageous because they do not bend under the vertical pressure load. The connection between pallet base and pallet skid can can only be solved simply and non-destructively, when the foot receiving ridges and the connecting portions of the skid do not change their geometry and are dimensionally stable.

In order to increase the stability and in particular the load-bearing capacity of the entire pallet, the pallet body may additionally be provided in the deck area with receiving means for reinforcing elements, e.g. B. steel, be equipped. When transporting goods inside and outside it may be advantageous if the pallet is equipped with one or more transponders for tracking the goods or the pallet. Therefore, the pallet can be advantageously provided with at least one receiving device for receiving transponders. The transponder can advantageously be fastened before connecting the runner to the pallet foot. There Through it is protected by the positive connection between the pallet base and pallet skid against environmental influences. In this case, the transponder permanently, z. B. by gluing, or only for a certain period, eg. B. by clamping, remain in the receiving device. To replace the transponder, the runner is released from the pallet body and the transponder is changed. This can be advantageous, for example, if the transponder is defective or the range of customers with different transponder systems is used in pool use.

in the The invention will be exemplified with reference to the drawings explained. It shows:

1 an isometric view of a plastic pallet according to the invention,

2 a perspective bottom view of a pallet center foot according to the invention without skid,

3 a perspective view of a pallet skid according to the invention,

4 a sectional view of a pallet skid according to the invention 3 .

5 a sectional view of the connection mechanism of the pallet 1 ,

In the 1 illustrated plastic pallet 1 consists of a deck designed as a horizontal surface 2 , nine from the deck 2 protruding and downward feet 3 and three runners 6 , The deck 2 and the feet 3 form the pallet body, are made in one piece and consist of an impact-resistant material, eg. B. PP.

According to 1 Form the layout of the deck 2 , the feet 3 and the runners 6 together the entry openings 7 for the tines of the industrial trucks.

The outer feet 4 and middle feet 5 each have an approximately quadrangular cross section. However, there are also other cross-sectional shapes, for. B. circular, possible. The outer feet 4 have in comparison to the middle feet 5 a reduced width. In other types of pallets, which may also have a different number of feet and / or runners, all feet may have the same width or there may be reverse width ratios. A skid 6 is form-fitting with three pallet feet each 3 connected. The outer edges of the outer feet 4 extend to the footprint of the pallet skid 6 , and are thus longer than the inner edges of the outer feet 4 , When connecting runners 6 and outside feet 4 becomes the hollow chamber web profile 17 (not shown) thereby form-fitting from the outer edges of the outer feet 4 Covered so that no dirt and no water in the hollow chamber profile 17 can accumulate.

As in 1 represented, owns the deck 2 on the top profilings 8th for better locking of generic pallets in the empty stack and is a closed, flat surface. The deck can also have a different structure, for example a grid structure, and / or different locking ribs at the edges or in the middle.

In 2 the metatarsus 5 the pallet 1 shown from below. The cavity of the metatarsus 5 forms the receiving area for the middle receiving bar 14 the pallet skid. The metatarsus 5 has a cross rib inside 10 , Advantageous is the rib 10 designed so that when connecting the skid 6 with the palette foot 5 positive fit on the rib 15 the skid 6 and thus the stability of the pallet 1 is increased in the loaded state. The cavity of the metatarsus 5 and / or the outer feet 4 can also be designed without ribs or with another rib structure. In addition, the metatarsus 5 on one broadside inside two protrusions 9 for detachable connection of the runner 6 with the metatarsus 5 on. The opposite inner broad side of the metatarsus 5 is not visible. For better locking of the skid 6 can also projections there 9 are located. The projections 9 are in the example provided with a radius, so that the connection between skid 6 and metatarsus 5 can be solved easily, but there are other geometries of the projections 9 , such as locking lugs, possible. Also, the projections can 9 over the entire length of the inner broad side of the middle palette foot 5 extend or consist of several interrupted sections. The projections 9 are analogous to at least one inner broad side of at least one outer foot 4 , It is also conceivable that the projections 9 in the metatarsus 5 or in the outer feet 4 have different geometries, because the geometries of the feet 3 are different.

Based 2 as well as in 1 , it is good to see that the final contour of the midfoot 5 exactly the contour of the top 11 the skid 6 adjusted to achieve the best possible fit.

In 3 becomes a pallet skid according to the invention 6 shown. The skid 6 consists of a closed top 11 and a closed, straight lying bottom 12 and has approximately a trapezoidal geometry. The skid 6 can also have other geometries. So the skid 6 better of industrial trucks can be driven over, it can be advantageous with so-called approach slopes ver be seen. At the two end regions is in each case an upwardly directed outer receiving web 13 that of a corresponding outside foot 4 a pallet body is received. In the middle of the runner is accordingly the middle take-up bar 14 , that of a corresponding metatarsus 5 a pallet body is received. Again, like the one in 2 metatarsus 4 a cross rib 15 present, leaving the cross rib of the skid 15 at the assembled pallet 1 exactly form-fitting at the cross rib 10 of the metatarsus 5 is applied, reducing the load capacity of the pallet 1 through the more stable middle feet 5 is increased.

At the front outer receiving bar 13 and at the middle intake bar 14 are in the upper part of the executed as undercuts Verrastungsbereiche 16 shown, which together with the corresponding projections 9 of the pallet feet 3 the detachable connection between the pallet body and runners 6 form. To ensure a connection that is as easy as possible, the geometry of the undercut must be ensured 16 on the geometry of the projections 9 in the palette foot 3 be coordinated. The skid 6 has a continuous hollow chamber web profile 17 , which in conjunction with the very rigid material maximum flexural rigidity is achieved. In the example, the hollow chamber profile 17 three bridges 18 on. The number of bars 18 may be different. It is important that the webs 18 are made stable and do not have too small a wall thickness. To the stability of the hollow chamber profile 17 To increase, additional transverse ribs can be introduced or the webs 18 can be in a different geometry, eg. B. as a bridge framework, running.

The outer receiving webs 13 have a slot in the middle 19 for receiving a corresponding rib 20 the outer feet 4 of the pallet body. Also, this will increase the carrying capacity and stability of the pallet 1 elevated.

4 represents a section through a blade according to the invention 6 dar. In the front area is the hollow chamber web profile 17 with three bars 18 shown. The bridges 18 make up together with the shell 11 and the lower part 12 approximately rectangular cavities, which, as shown here, may have rounded corner areas. In the area of the bottom 12 owns the skid 6 profiles 8th , for better locking on generic pallets 1 , In the rear area is an outer receiving bridge 13 shown. In the middle of the jetty 13 there is a slot 19 for receiving a corresponding rib 20 an outdoor foot 4 of the pallet body. For a better introduction of the bridge 13 in the foot 4 the web can be provided with radii or chamfers at the upper end.

5 sets the locking mechanism between pallet feet 3 and pallet skid 6 detailed. In the upper part of the picture is the skid 6 from below into the pallet feet 3 pushed. This will be the recording webs 13 . 14 the skid 6 in the corresponding receiving areas of the feet 3 introduced.

The second drawing already shows the positive connection between pallet feet 3 and skid 6 completed. The sectional view clearly shows that the undercuts 16 the receiving webs 13 . 14 positive fit on the projections 9 the feet 3 issue. In the area of the metatarsus 5 It is also clear that the rib 10 of the foot 5 exactly on the rib 15 the skid 6 rests. The outer edge of the outer foot 4 protrudes to the bottom 12 the skid 6 and forms part of the footprint.

The Invention is not on the illustrated embodiment limited. For example, the locking between Pallet base and skid be designed so that the receiving webs of the skid protuberances and the insides the feet have corresponding undercuts.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - EP 1076011 B1 [0001]

Claims (7)

Plastic pallet consisting of a deck, protruding from the deck, downwardly directed feet of an impact-resistant material and located at the bottom of the feet, the feet interconnecting runners, characterized in that • the pallet separately manufactured runners from another, preferably stiffer, has material, • the skids have an integrally molded hollow chamber profile with inner stiffening ribs, • the runners in the receiving webs are positively and releasably connected to the pallet feet and have at least one corresponding undercut in this area and • the undercuts of the pallet skids so are formed so that the pallet skids solve at a vertical pressure load from above the pallet skids from the determined shaped projections of the pallet feet, without damaging the undercuts of the pallet skids and / or the protrusions of the pallet feet. Plastic pallet according to claim 1, characterized that the skids are made of fiberglass reinforced plastic. Plastic pallet according to claim 1 or 2, characterized characterized in that the skids are made of the same polymer as the Base material of the pallet exist. Plastic pallet according to one or more of the preceding Claims, characterized in that the skids a closed top and at least partially profilings on have the closed bottom and the profiles after below not about the closed, planed areas of the Stand out skid bottom. Plastic pallet according to one or more of the preceding Claims, characterized in that the pallet the top at least partially profilings for locking of identical pallets on top of the pallet owns and the profiles compared to the upper surfaces do not protrude. Plastic pallet according to one or more of the preceding Claims, characterized in that the pallet in Deck area receiving means for reinforcing elements, z. B. steel. Plastic pallet according to one or more of the preceding Claims, characterized in that the pallet at least has a receiving device for a transponder.