Curved conveyor section having guide rails with adjustable spacing

1. Curved conveyor section for transporting articles guided between two guide rails and comprising means for adjusting the spacing between the two guide rails, characterised in that at least one of the two guide rails is elastically deformable, and in that the adjustment means have been designed to displace and deform this elastically deformable guide rail so as to provide it with a given curvature which depends on its position.

2. Curved conveyor section according to claim 1 , characterised in that the adjustment means comprise for a guide rail a deformation plate which is elastically deformable, and in that the guide rail is rigidly fixed to this deformation plate.

3. Curved conveyor section according to claim 2 , characterised in that the deformation plate is divided into several sectors connected by deformable joining zones.

4. Curved conveyor section according to claim 3 , characterised in that the deformation plate comprises at least one deformation slit extending in the direction of the width of the plate from one of the two longitudinal edges of the plate.

5. Curved conveyor section according to claim 1 , characterised in that one guide rail and the deformation plate associated with it each have the shape of and arc of a circle and in that the deformation plate is divided into at least three sectors including a central sector.

6. Curved conveyor section according to claim 5 , characterised in that one guide rail and the deformation plate associated with it each have the shape of a quarter circle and in that the deformation plate is divided into at least five sectors.

7. Curved conveyor section according to claim 1 , characterised in that the adjustment means comprise for a guide rail at least one fixed stop and means for displacing the guide rail with respect to this stop which allow the guide rail be deformed by resting on this stop.

8. Curved conveyor section according to claim 7 , characterised in that the fixed stop is passed through a slit made directly in the deformation plate or in a stopping plate fixed rigidly to the deformation plate.

9. Curved conveyor section according to claim 1 , characterised in that the adjustment means have been designed so as to displace a guide rail and exert mechanical deformation forces on this guide rail in a direction parallel to the bisector of the angular sector defined by the guide rail.

10. Curved conveyor section according to claim 1 , characterised in that the adjustment means comprises several jacks.

11. Curved conveyor section according to claim 5 , characterised in that the adjustment means comprises several jacks and each sector of a deformation plate, except possibly the central sector is connected to the rod of at least one jack.

12. Curved conveyor section according to claim 6 , characterised in that the adjustment means comprises several jacks and the rod of each jack is secured to the deformation plate by means of a link permitting a clearance in rotation along an approximately vertical axis of the rod with respect to the deformation plate.

13. Curved conveyor section according to claim 1 , characterised in that the two guide rails are elastically deformable, and in that the adjustment means have been designed to displace and deform each guide rail.

14. Conveyor for transporting articles and comprising several successive sections, characterised in that at least one of these sections is a curved section according to claim 1 .

15. Curved conveyor section according to claim 4 , characterised in that:

one guide rail and the deformation plate associated with it each have the shape of and arc of a circle and in that the deformation plate is divided into at least three sectors including a central sector;

one guide rail and the deformation plate associated with it each have the shape of a quarter circle and in that the deformation plate is divided into at least five sectors;

the adjustment means comprise for a guide rail at least one fixed stop and means for displacing the guide rail with respect to this stop which allow the guide rail be deformed by resting on this stop;

the fixed stop is passed through a slit made directly in the deformation plate or in a stopping plate fixed rigidly to the deformation plate;

the adjustment means have been designed so as to displace a guide rail and exert mechanical deformation forces on this guide rail in a direction parallel to the bisector of the angular sector defined by the guide rail;

the adjustment means comprise several jacks;

each sector of a deformation plate, except possibly the central sector is connected to the rod of at least one jack.

16. Curved conveyor section according to claim 12 , characterised in that the two guide rails are elastically deformable, and in that the adjustment means have been designed to displace and deform each guide rail.

17. Curved conveyor section according to claim 15 , characterised in that the two guide rails are elastically deformable, and in that the adjustment means have been designed to displace and deform each guide rail.

18. Conveyor for transporting articles and comprising several successive sections, characterised in that at least one of these sections is a curved section according to claim 13 .

19. Conveyor for transporting articles and comprising several successive sections, characterised in that at least one of these sections is a curved section according to claim 16 .

20. Conveyor for transporting articles and comprising several successive sections, characterised in that at least one of these sections is a curved section according to claim 17 .