EP0957040B1 - Transport system for a stack of vehicle tyres - Google Patents

Abstract

The system has a disc-shaped palette (2) to support the bottom tyre (3a) in the stack (3). The palette has lower projecting support feet (13), with channels between them for the insertion of the tines (10) of a trolley or fork lift truck. Also claimed is that the palette (2) is of plastics, and preferably polypropylene.

Description

The invention relates to a transport system for transportable in the form of stacks vehicle tires.

In tire stores, etc. tire stacks are usually formed. The measures provided for transporting such stack, two-wheel trolley have a recorded on the chassis frame with two spars and a projecting from the lower end of the spars approximately at right angles, sword-shaped boom. To pick up a stack of this boom is retracted until the start of the spars on the stack circumference under the respective male stack. Subsequently, the transport cart is tilted, so that the attacked by the boom and supported tire stack is placed with its circumference on the spars.

So far, the lowest tire of each stack is directly on the floor of the warehouse, etc., which, although a good, all-round accessibility for the trolley results. But it requires much force to push the boom under such a stack, or to bring him out of engagement with such a stack. It has therefore already helped to grease the sword-shaped boom. However, this only gives a short-term relief, since the lubricating film is consumed very quickly. In addition, this leads to undesirable lubrication on the tire. In order to allow the extraction of the boom, the previously used trolleys also have an attacking on its axis, pivoting pull rod, which requires a not inconsiderable additional construction costs.

FR-A 1464115 shows a wooden pallet for containing heavy loads such as metal wire bundles, paper rolls, etc. This known wooden pallet contains two parallel stringers on which a circular pickup table is accommodated. It is not possible to carry several of the known wooden pallets hanging on a suitable for transporting a tire stack transport cart. Apart from that, the known wooden pallets are not only expensive and problematic in disposal, but also have a high weight, which would make handling a tire stack transport system difficult. In addition, the parallel support beams only result in a continuous entry channel, so that the known wooden pallets can only be received from two sides which are opposite each other by 180 ° on a delivery arm of a transport device. This would make handling difficult in a tight tire warehouse with tightly packed tire stacks.

US-A-4,893,713 shows a device for receiving a single aircraft tire. This known device consists of a lower part and a herewith braced upper part. These parts can be clamped together by a central screw and adapted in cross-section to the tire cross-section, so that virtually the tires result from above and below comprehensive shells. An arrangement of this kind would be totally unsuitable for a tire stack transport system for handling car tires stored in a tire store, etc.

The US-A 4480 748 shows a rectangular plastic pallet, which is used as the top and bottom of stackable shipping containers use. Again, this is obviously not about a pallet for receiving a stack of tires, but for receiving heavy cargo units. But even a diminutive of the known heavy duty pallet would not lead to a pallet suitable for a tire stack transport system.

US-A-4 829 909 shows a plastic pallet of cruciform configuration for transporting heavy loads such as rolled metal strips, etc. This known heavy duty pallet includes annular center, from which four support arms protrude radially, which are provided on the outside with receiving means for tension straps, by means of which the charge can be clamped to the pallet. The said arms are provided in pairs with parallel entry channels. Again, a reduction would not lead to a suitable pallet for a tire stack transport system. The inclusion of the loaded pallet on the trolley of the tire stack transport system of the present invention in a narrow tire store would be difficult. The same applies to the handling of empty pallets. In addition, provided in the known arrangement four support arms lead to a static indefinite edition, which can lead to uncertainty in a tire stack that is not clamped to the pallet.

The invention has for its object to provide a tire stack transport system, which ensures a rational operation with high ease of use.

This object is achieved by claim 1.

In this way, a transport system for transportable in the form of stacks of vehicle tires comes in proposal, which includes a transport cart and disc-shaped pallets, on each of the lowest tire of an associated stack can be placed and in the loaded state on a comprehensive at least one sword boom arrangement of the transport cart and can be stacked in the empty state and so hanging on the trolley, with the pallets, which are formed as plastic thermoformed moldings and have a derived from a triangle configuration with slightly curved sides with Durchgriffsausnehmungen for hanging and arranged in the corners downwardly projecting , are provided an upwardly open, conically widening cross section having support legs, between which three on the circumference of the pallet repetitive entry channels are provided for the boom assembly of the transport cart.

The tire stack transport system according to the invention leads advantageously to a meaningful and rational operation in the handling of tires and pallets. Due to the fact that the pallet belonging to the tire stack transport system according to the invention comprises three directions and therefore practically universally accessible receiving channels for the boom arrangement of the transport cart associated with the tire stack transport system according to the invention, a pallet loaded with a tire stack can also be located in a narrow tire store in which the each tire stack are close together, well received or discontinued. The derived from a triangular shape configuration of the range ensures a reliable, statically determined recording of the associated tire stack. Since a plurality of empty pallets can be carried along hanging from the transport cart associated with the tire stack transport system, the handling of the empty pallets is also facilitated in an advantageous manner.

Advantageous embodiments and expedient developments of the higher-level measures are specified in the subclaims. Thus, the pallets may be expediently provided with at least one centering aid associated with its upper side.

A further advantageous measure may consist in that the empty pallets can be suspended on a console-like holding device of the transport cart.

Advantageously, the pallet may be formed as a plastic thermoforming molding. This advantageously makes it possible to achieve a comparatively large wall thickness, which is expediently 2 to 3 mm, and nevertheless ensures cost-effective production.

Further advantageous embodiments and expedient developments of the parent measures are specified in the remaining subclaims and from the following description of the example with reference to the drawing closer.

Figur 1

eine schematische Darstellung eines erfindungsgemäßen Reifenstapel-Transportsystems,

Figur 2

einen Schnitt durch die in Figur 1 verwendete Palette und

Figur 3

eine Ansicht eines weiteren Beispiels für eine erfindungsgemäße Palettte.

In the drawing described below:

FIG. 1

a schematic representation of a tire stack transport system according to the invention,

FIG. 2

a section through the pallet used in Figure 1 and

FIG. 3

a view of another example of a pallet according to the invention.

1 shows a trolley 1 with associated pallet 2, which is suitable for receiving a tire stack 3. Such stacks consisting of multiple, stacked tires 3a are formed, for example, in the manufacture or storage of tires.

The trolley 1, which is constructed in the manner of a two-wheeled sack truck, has a formed by an axle with two lateral wheels chassis 4, on which a support frame is received with two parallel bars 5. These are connected at their upper end and approximately at the handle height by bracket 6, 7, wherein the upper bracket 6 for tilting the trolley 1 and the lower bracket 7 for driving the trolley. 1 to be used. Between the spars 5, a curved wall 8 formed here by a perforated plate can be inserted, at the back of which a recording device 9 can be attached. In the example shown, this is a writing pad. It would also be conceivable to use an electronic device with its own intelligence.

The support frame accommodated on the chassis is further provided with a boom assembly containing two parallel spaced juxtaposed, sword-shaped boom 10 here. The booms 10 are mounted at the lower end of the spars so that they include a right angle with the bars 5, so rest on the floor at about vertical spar alignment. The cantilevers 10 may be tapered to their free end in width and / or thickness.

Each stack 3, which is formed by stacking of tires, a plate or disc-shaped pallet 2 is assigned, on which the lowest tire of the associated stack 3 is placed, as indicated by the arrow 11. For this purpose, the pallet 2 has a receiving bed 12 which extends annularly around here for the associated tire and support legs 13 projecting in a knob-shaped manner from the receiving bed 12, which result in a ground clearance of the receiving bed 12 indicated at a in FIG. In the example shown, the pallet 2 has a circular configuration. However, another configuration would be conceivable, e.g. a configuration represented by a polygon, such as a triangle.

Between the outgoing from the receiving bed 12 supporting feet 13 arise, as Figure 2 can be seen further, entry channels 14 for the sword-shaped boom 10 of the transport cart. The support legs 13 are arranged so that the retraction channels 14 repeat at the periphery of the pallet 2. This ensures that the trolley 1 with their arms 10 can be brought from several sides under the pallet 2 in position, as indicated in Figure 1 by the arrows 15.

In the example shown, four arranged with the same mutual angular distance, ie by 90 ° staggered support legs 13 are provided. It would also be conceivable to use fewer, e.g. three support feet or more, e.g. provide five support feet. In any case, these should be arranged evenly offset from each other. The indicated in Figure 2 at a, caused by the height of the support legs 13, clear height of the Einfahrkanäle 14 corresponds at least to the largest thickness of the boom 10 and has in contrast expedient slightly oversize. A dimension a in the range of 15 to 25 mm, preferably of about 20 mm, has proved to be useful.

In the example shown, the pallet 2, as Figure 2 further clearly shows, a central dome-shaped elevation 16 which is encompassed by the annular circumferential recording bed 12 and forms its radially inner boundary. The cross-sectional contour of the pallet 2 in the region of the receiving bed 12 may be flat or preferably adapted to the cross-sectional configuration of the tires to be picked up. In the example shown, a radially outer boundary of the receiving bed 12 is provided. This is formed by a completely circumferential cup rim 17 here. The survey 16 and / or the rim 17 ensure a reliable centering of the respective lowest tire of the associated tire stack 3. It is also possible to adapt each of the two Zentrierungshilfsmittel to another tire. For example, the diameter of the inner centering, here the survey 16, be adapted to the inside diameter of the rim bore of a smaller tire, while the diameter of the outer centering, here the plate rim 17, is tuned to the outer diameter of a larger tire. This ensures that one and the same range is usable for different tire sizes. The centering devices do not have to be formed circumferentially. However, it would also be conceivable to provide a non-circumferential outer boundary, for example in the form of claw-shaped projections.

The plate edge 17 and the peripheral edge of the elevation 16 are V-shaped inclined to each other, so that there is an upwardly expanding cross-section of the receiving bed 12. The support legs 13 are, as can be clearly seen from Figure 2, formed as upwardly open formations of the bottom of the receiving bed 12, which are also flared upwards. In this way, a stackable configuration of the pallet 2, i. several empty pallets 2 can be stacked inside each other, resulting in a comparatively low stack height.

Such a stack can be received on the transport cart 1, which may have a suitable holding device for this purpose. In the example shown, the trolley 1 is provided for this purpose with a protruding from the wall 8 to the rear bracket 18 to which one or more nested pallets 2 are suspended. The pallets 2 are provided with in the region of the lid of the survey 16 Durchgriffsausnehmungen 19 through which the console 18 can pass. In the example shown, two through a web 20 separate Durchgriffsausnehmungen 19 are provided. The here provided web 20 can act as a carrying handle, which facilitates handling.

The basic construction and operation of the underlying 3 of the figure pallet corresponds to the arrangement of Figures 1 and 2. For the same parts therefore use the same reference numerals.

The pallet 2 on which FIG. 3 is based has a triangle-derived configuration as already mentioned above, wherein the sides are slightly bent so that a cross-sectional shape of the piston of a rotary piston engine results in a similar configuration. The triangle-like configuration of the pallet 2 enables low-waste manufacturing and ensures a material-saving production. In the three corner regions of the pallet 2, three support legs 13 are provided. This results in a three-point pad, which ensures a wobble-free support even on uneven ground. End of the support legs 13 forming depressions or radially inwardly thereof is provided an inner centering aid 16a, here in the form of concentric with the center of the pallet, cam-shaped elevations. A circumferential, concentric to the center of the pallet web or a central, dome-shaped elevation would be conceivable. In the area of the outer pallet edge, no further centering aid is provided here, so that a flat support bed 12 results, which extends radially outwards from the inner centering aid 16a. The absence of the radially outer boundary of the receiving bed 12 facilitates the use of the present pallet 2 for different tire sizes, since there is the possibility that larger tires may project slightly beyond the pallet 2 in the radial direction. The present pallet 2 also has a Durchgriffsausnehmung 19, which is designed here as a centric hole. The present pallet 2 can therefore also be hung on the tire transport cart 1 without further ado.

The pallet 2 is expediently designed as a plastic product in each case. The use of polypropylene can prove to be particularly useful. The wall thickness is 2 to 3 mm. Such a large wall thickness can be realized particularly easily by forming corresponding plastic sheets in the deep-drawing process. The formation of the pallet 2 as a plastic deep-drawing mold also allows economical production even for smaller series.

Claims (9)

1. A transport system for transporting vehicle tyres which are transportable in the form of stacks (3), comprising a transport cart (1) and disc-shaped pallets (2) on each of which a bottom tyre (3a) of an associated stack (3) of tyres can be placed, which pallets (2) can in loaded condition be taken up by a cantilever arrangement (10) of the transport cart (1), comprising at least one arm, and are stackable into one another when not loaded and are in this way transportable in suspended mode on the transport cart (1), with the pallets (2), designed as deep drawn plastic mouldings and having a configuration which is derived from a triangle with slightly bent sides, being provided with reach-through recesses (19) for hanging up the said pallets (2) and with support feet (13) arranged in the corner areas and projecting downward, having a cross-section which is open towards the top and conically widening in an upward direction, between which feet provision is made for three repeated slide-in channels (14) arranged along the circumference of the pallets (2) for receiving the cantilever arrangement (10) of the transport cart (1).
2. A transport system according to Claim 1, characterized in that the pallets (2) are provided with at least one centring aid (16, 17; 16a) associated with their upper side.
3. A transport system according to any of the preceding Claims, characterized in that the pallets (2) are provided with at least one radially inner centring aid (16, 16a) preferably designed as a hump-like elevation radially inwardly limiting a surrounding ring-shaped receiving bed (12) which is preferably designed as a flat support surface.
4. A transport system according to any of the preceding Claims, characterized in that the pallets (2) are provided with at least one radially outer centring device (17) preferably designed in the form of a plate rim, such centring device (17) limiting the preferably flat, ring-shaped receiving bed (12) on its radially outer side.
5. A transport system according to Claim 2 or 3, characterized in that the centring devices (16, 16a and 17 respectively) do not extend along the entire circumference.
6. A transport system according to any of the preceding Claims, characterized in that the support feet (13) are designed as bulged-out portions of the bottom of the receiving bed (12).
7. A transport system according to any of the preceding Claims, characterized in that the pallets (2) are made of polypropylene and have a wall thickness of preferably 2 - 3 mm.
8. A transport system according to any of the preceding Claims, characterized in that the cantilever arrangement (10) of the transport cart (1) comprises two arms arranged side by side and spaced at a certain distance.
9. A transport system according to any of the preceding Claims, characterized in that the pallets (2) in an unloaded condition are attachable to a bracket-like holding device (18) on the transport cart (1).

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