Support for moving cylindrical elements and method and conveyor using such supports

1. Support for rolling a cylindrical element, this support comprising first guide means capable of guiding the cylindrical element at a height z 1 , characterized in that downstream in the direction in which the cylindrical element rolls, the said support comprises second guide means capable of guiding the cylindrical element at a height z 2 higher than z 1 , wherein an amount of friction between the said second guide means and the cylindrical element is lower than an amount of friction between the first guide means and the cylindrical element and also the first guide means comprise a Vee shaped roller.

2. Support according to claim 1 , characterized in that the said second guide means are capable of authorizing a rotation of the cylindrical elements around an axis of these cylindrical elements.

3. Support according to claim 1 , characterized in that the second guide means comprise at least two ball bearings designed to be in contact with the said cylindrical elements.

4. Support according to claim 3 , characterized in that the said ball bearings are made of stainless steel.

5. Support according to claim 3 , characterized in that housings for the two ball bearings each are angled at 45° with respect to a main axis of the support, perpendicular to the direction in which the cylindrical elements roll.

6. Support according to claim 5 , characterized in that the two ball bearings are positioned such that one of them is situated upstream of the other, in the direction in which the cylindrical elements roll.

7. Support according to claim 1 , characterized in that the support comprises a lateral adjustment system for the assembly that moves the cylindrical element wherein the lateral adjustment system is formed by the first and the second guide means, as well as a vertical adjustment system for this same assembly formed by the first and the second guide means.

8. Support according to claim 1 , characterized in that the support comprises means capable of adjusting the difference between the height z 1 and the height z 2 .

9. Support according to claim 1 , characterized in that the difference between the height z 1 and the height z 2 is approximately 0.5 mm.

10. Cylindrical element transport device, characterized in that it comprises at least one support according to any of claims 1 to 9 , each support being capable of authorizing the rolling of the said cylindrical elements.

11. Method of transporting cylindrical elements on at least one support, according to any of claims 1 to 9 , characterized in that the cylindrical elements, when they pass on each support, undergo the following steps:

primary guiding with the aid of first guide means,

secondary guiding substituting the primary guiding with the aid of second guide means, the friction resulting from the secondary guiding being lower than the friction resulting from the primary guiding.