Conveyor means with concave belt

1. A conveyor means with an elastic load-bearing means guided between a drive and a return roller which are spaced apart parallel to and opposite one another, wherein said load-bearing means circulates endlessly in a carrying run and a lower run, is flexible in all directions and is configured to receive articles to be conveyed, and which can be driven in a conveying direction by means of drive trains disposed on longitudinal edges of said load-bearing means, characterised in that a support means for the carrying run is located between the carrying run and the lower run, wherein the drive trains are stretched to a greater extent than a region of the load-bearing means located between them.

2. The conveyor means as claimed in claim 1 , characterised in that the support means is given a concave shape when seen in the direction of the carrying run.

3. The conveyor means as claimed in claim 1 , characterised in that the support means is curved one-dimensionally and has a linear or flat deepest region between and parallel to the drive and return rollers.

4. The conveyor means as claimed in claim 1 , characterised in that the support means is curved two-dimensionally and has a deepest region over a certain area or at a point between the drive and return rollers and between the longitudinal edges of the load-bearing means.

5. The conveyor means as claimed in claim 1 , characterised in that the support means has one or two supporting region(s) adjacent to one or both drive and return roller(s).

6. The conveyor means as claimed in claim 1 , characterised in that the support means has one or two supporting edge region(s) adjacent to one or both longitudinal edges of the load-bearing means.

7. The conveyor means as claimed in claim 1 , characterised in that, in the unloaded state, the load-bearing means does not touch the support means.

8. The conveyor means as claimed in claim 1 , characterised in that, in the unloaded state, some regions of the load-bearing means rest on the support means.

9. The conveyor means as claimed in claim 1 , characterised in that when the load-bearing means is in an unloaded state, the drive trains are guided between the drive and return rollers with a predetermined or adjustable biasing force.

10. The conveyor means as claimed in claim 1 , characterised in that a lower support means is disposed beneath the lower run of the load-bearing means in order to limit or eliminate the sag of the lower run.

11. The conveyor means as claimed in claim 1 , characterised in that the drive trains are toothed belts fixed on the inside to the longitudinal edges of the load-bearing means.

12. The conveyor means as claimed in claim 1 , characterised in that the load-bearing means has a greater deflection radius on at least one of the drive and return rollers in the region of the drive trains than in a region located between them.

13. The conveyor means as claimed in claim 1 , characterised in that the drive and return rollers have a plurality of zones of different diameters along their axial length, through which zones with different degrees of stretching are formed in the load-bearing means.

14. A vehicle with a conveyor means as claimed in claim 1 , wherein a conveying direction of the conveyor means is transverse to a direction of travel of the vehicle, especially configured as a car of a load item conveyor which is connected mechanically or in a controlled manner to further vehicles of the same kind and is rail-mounted or is configured as a driverless transport system.