Device for assembling-disassembling a support ring in or from a tyre, as well as machine comprising such a device

1. A device for assembling a support ring within a tire comprising:

a base;

a column rising from said base;

a support arm mounted on said column;

a group for gripping and releasing a support ring, wherein said group for gripping and releasing is articulated to said support arm in order to be angularly movable with respect thereto, wherein said group for gripping and releasing comprises:

two engagement ends for engaging respective portions within a central hole of said support ring; and

an actuator for approaching and moving apart said engagement ends along a direction of elongation-shortening between a first engagement position, wherein said group is able to stretch the support ring along said direction so as to impart to said support ring a substantially elongated configuration, and a second release position for the support ring,

wherein the device further comprises a tensioning apparatus configured to enlarge a central hole delimited by the tire in order to facilitate an insertion of the support ring, wherein said tensioning apparatus comprises at least one rope, at least one constrain component supported at a respective end of the rope, and a traction component of the rope.

2. The device for assembling according to claim 1 , wherein said support arm is slidably mounted on said column and said device comprises means for dislocating said support arm along said column.

3. The device according to claim 1 , wherein said column is pivotably connected to said base and said device comprises means for angularly moving said column around a pivot axis.

4. The device according to claim 1 , wherein said group for gripping and releasing is articulated to said arm so as to be angularly movable, in use or during assembly of said support ring, with respect to said arm as a function of a reaction force imparted to said group for gripping and releasing by said support ring.

5. The device according to claim 4 , wherein said group for gripping and releasing is articulated to said arm so as to be angularly movable, in use or during the assembly of said support ring, with respect to said arm as a function of the reaction force imparted to said group for gripping and releasing by said support ring, while driving or controlling the movement of said arm with respect to said column or of said column with respect to said base.

6. The device according to claim 1 , wherein said two engagement ends of said group for gripping and releasing comprise a first end that is C-shaped or V-shaped and intended to be inserted and wrap from an inside of the support ring.

7. The device according to claim 6 , wherein said first end has a bar component fixed to or integral with a component of the actuator for approaching and moving apart said engagement ends as well as a pair of plates, each fixed to a respective end of said bar component, so as to delimit therewith a cradle zone.

8. The device according to claim 7 , wherein said first end comprises a guide rod slidably mounted within a hole delimited by a shelf component rising from said actuator.

9. The device according to claim 1 , wherein said at least one constrain component comprises a sheet shaped so as to delimit a zone for the housing and sliding of a respective portion of a bead of the tire, and wherein the traction component comprises a winch.

10. The device according to claim 1 , wherein each constrain component can be adjustably positioned with respect to said at least one rope.

11. A device for disassembling a support ring from a tire comprising:

a base;

a column rising from said base;

a group of extraction for extracting the support ring from the tire, said group of extraction comprising:

an actuator articulated to said column so as to be angularly movable with respect to said column, wherein said actuator comprises a constrain end; and at least one belt component supported at the constrain end of said actuator and configured to be wrapped around or to enclose a portion of the support ring, so as to be able to drag the support ring out of an inner channel of the tire,

wherein said actuator comprises a stem, said stem being movable relative to a respective cylinder, said cylinder being articulated to said column and wherein said constrain end comprises a free end of said stem.

12. The device for disassembling according to claim 11 , wherein said actuator is articulated to said column so as to be angularly movable, in use or during the disassembly of the support ring, with respect to said column as a function of a reaction force imparted to said belt component by said support ring and/or by said tire.

13. An assembly-disassembly unit comprising the device for assembling according to claim 1 and the device for disassembling according to claim 11 , wherein said device for assembling and said device for disassembling share the same one base and the same one column and wherein said group of extraction is mounted on said column in a position above said group for gripping and releasing.

14. A machine for assembling and/or disassembling a support ring within and/or from a tire comprising a device according to claim 1 as well as a second column and a support group of said tire, said support group being slidably mounted on said second column and movable with respect thereto by means of a second actuator, said support group comprising at least one claw.

15. A machine for assembling and/or disassembling a support ring within and/or from a tire comprising a device according to claim 11 as well as a second column and a support group of said tire, said support group being slidably mounted on said second column and movable with respect thereto by means of a motor.

16. The machine according to claim 14 , wherein said second column is slidably mounted on said base and movable with respect thereto by means of an activating actuator.

17. The machine according to claim 15 , wherein said second column is slidably mounted on said base and movable with respect thereto by means of an activating actuator.

18. The machine according to claim 14 , wherein said support group comprises at least one claw for engaging a bead of the tire, so as to define a zone of gripping or support of the tire facing upwards and towards sides of said support group and defining a free zone facing a bottom of said support group that is lacking claws.

19. The machine according to claim 15 , wherein said support group comprises at least one claw for engaging a bead of the tire, so as to define a zone of gripping or support of the tire facing upwards and towards sides of said support group and defining a free zone facing a bottom of said support group that is lacking claws.