DESCRIPTION FIELD OF TECHNIQUE

The present invention relates to a mobile unit for the preliminary treatment for the recovery of OTR tires and to the operating method.

More specifically, the present invention relates to a mobile unit capable of treating large-sized OTR (off the road) tires , and therefore up to 63 inches in diameter of the rim.

STATE OF TECHNIQUE

It is known that in quarries and mines means of handling large materials are used, which are known under the English term of large mining trucks. Among these are for example mine dumpers, or vehicles equipped with a body that receives the extracted material from other dumpers of material handling.

Mining extractive sites are areas of great territorial extension in many cases greater than 100 km2, therefore these large vehicles must withstand very large- scale movements, covering considerable distances on rough terrain.

Therefore in the extractive sector the prescription is known of replacing tires - by default - approximately every 5/6 months, in order to guarantee the safety of operators and construction materials and equipment.

The transport of used and into disuse tires is a significant problem for the extraction sites, having such tires large size and considerable weight and considering that every means may provide annually a dozen of tires to be disposed of and therefore the problem is very relevant.

Such means may have a diameter of tires up to 4, 5 meters with a weight each up to 5 tons, and these measures make easily understandable the reason why it is relevant for the extractive sector the problem of disused tires to be disposed of.

In general, the disposal of disused tires represents a significant environmental problem, as their enormous size would entail at the final disposal sites all the related problems, such as poor biodegradability and ease of combustion. Systems and methods for recovering disused tires aimed at retreading new tires are known. Due to the industrial cutting and granulating processes of tires, it is possible to separate the various components (rubber, steel and fiber) so obtaining a material that can be used in multiple modes.

The mechanical recovery of the rubber consists in the reduction of the recovered material in homogeneous granulometries that allow the reuse of the same material in the compound used for the production of the new articles. The most consistent fraction of post-consumer recycled rubber comes from the recovery of the disused tires and it is for this reason that preliminary mechanical treatments are carried out on the discarded tire aimed at eliminating the metal component of the bead and reducing the volume of the tire and then sending the material to the mechanical shredding in order to obtain granules of reduced size.

The tire is a geometric figure almost toroidal, that is it is constituted by the revolution surface of a generating curve consisting of the section, in the case of the omega- shaped tire (the generator) , around a disjointed rotation axis from that curve. An equatorial plane is therefore understood to be a plane comprising the axes of symmetry of the omega-shaped section of the tire and therefore it is a plane that cuts the tire at the center line of the tread, so obtaining two equal halves or two species of circular hollow donuts (see fig. 6, 8, 9, 10). Finally, for an equatorial fraction of the tire 4 a cutting fraction is meant that corresponds to the cutting profile of the blade 24 in correspondence with the equatorial plane of the tire 4.

In general, the preliminary steps for a mechanical shredding currently include the following steps:

- first phase: bead removal : separation of metal rings supporting the bead, that is the part that is mounted on the wheel rim,

- second phase: division of the tire into two halves through the equatorial plane of the tire, resulting in two half tires,

- third phase: slice cutting of each half tire by subdividing them in slices easier to be handled and transported to the processing site for recovery or disposal. This procedure facilitates the reduction in weight and dimensions of the disused tires in such a way as to make it easy to move these materials to be recovered over long distances within the extraction site. However, the state of the art of the machinery used to carry out the aforementioned operating phases envisages a very complex and different operating machine for each of the three aforementioned phases, a circumstance which entails a considerable cost for the site operator.

A further disadvantage that will discussed concerning the known art is the poor operational efficiency in terms of time and human resources used for the assistance to the entire treatment process of the known systems.

With regard to the first step regarding the extraction of the bead, an operating machine is known on which the tire is loaded and which provides a pulling member passed inside the hole of the rim of the tire which engages both beads of the tire; the latter is maintained in abutment bound, and through a traction action the tie rod can rip from the body of the tire the beads, being such activity very dangerous considering that the beads of a tire are made by a weave of steel cables and those related to a 48-inch tire can weigh up to 90 kg. each. The weight and the elastic nature of the beads in fact oblige the operator of this machine according to the known art to remove one bead at a time for tires larger than 48 inches; in fact, after removing the first bead, the operator must remove the tire from the machine, rotate and insert it again in a working position and must remove the second bead, with just an average working operation by extracting beads and then for only the first phase of work of over 20 minutes, without considering the manipulation of an object that has an average weight of 4.500 kg. The human error factor is heavily present.

As far as the second operative phase of dividing the tire into two halves is concerned , the prior art involves working with a further machine called punch cutter, in which the tire is placed on a slightly inclined seat with respect to the vertical comprising a blade which rises and falls and cuts interspersed with a rotation of the tire for a corresponding distance. However, since the tire lies on its side during processing, the cutting process can create cutting imperfections due to an imperfect rotation of the tire which, due to the friction of the lateral surface on which it rests, can cause the tire to slightly turn back, contrasting the rotation and slowing down the operation of the machine.

Finally, as regards the third slicing phase, the prior art provides for the use of a third machine which provides for the horizontal positioning of a half tire and a shear that goes up and down by cutting the slices of this half, while the rotation of the half tire is made manually through a mechanical arm suitably maneuvered by an operator. Both cutting and rotation of the tire are carried out by the operator. Also in this case the operation is of poor economic efficiency and operational resources.

It should also be noted that the use of three different machines, one for each operation, entails the necessary handling of the material processed between one machine and the other, which penalizes the efficiency of the entire work flow in terms of time and resources employed.

Further types of machines for cutting the tires to be disposed of are known, mostly suitable for processing car or truck tires with standard sizes.

A first type of such machines is described in U.S: Patent n° 4,682,522 and comprises:

- means for compressing and flattening the tires to be treated, by applying a force on the peripheral circumference of the same;

- cutting means which receive the pressed and flattened tire for cutting it along its peripheral circumference through at least two turning blades, for obtaining two annular sectors; and

- second cutting means which receive in turn an annular sector for cutting it along axes perpendicular to the central axis of the tire and for dividing the same into four arched portions with a non homogeneous shape.

It is evident that, with a machine like the one described in such document, it is not possible to treat OTR tires. In fact, by pressing and flattening an OTR tire as the ones in question, by applying a force on the peripheral circumference of the same, compression powers would be necessary, which were completely uneconomical as also particular massive and heavy structures, in order to withstand the derived efforts. It is noted that OTR tires in question can ha a diameter up to 4,5 meters and even more, and a weight up to 5 tons each or greater.

Furthermore, by obtaining only four arched portions with a non homogeneous shape and from an annular sector of a tire, entails at least four cuts made on the bead of the same. At this point, it must be noted that for an OTR tire the bead can be made by weaving steel cables, with a total weight of 90 kg or more, and for the direct radial cutting of a bead of this kind, long lasting non automated and dangerous operations for the operators would be necessary. Therefore, the machine described in US 4,682,522 is not suitable for the treatment of OTR tires.

Another type of machine for the disposal of tires is described in US Patent N° 3,911,722 and it provides for a chute on which tires are dragged until reaching a cutting area provided with two blades and placed on the bed of a trailer. Such blades are of the single-effect type and are hinged to the trailer and rotate in order for cutting the tires in pieces or segments. By such machines the blades cut the tire in radial directions and also in this case the direct cutting of the bead is provided, which is impracticable in OTR tires for the reasons described above. Such cutting divides the tire along a plane perpendicular to the one described by its peripheral circumference, in order to obtain two half donuts destined to a cryogenic treatment.

The machines for the treatment of tires described in US Patent N° 4,682,522 and in US Patent N° 3,911,722 are suitable for processing car and truck tires of the most common sizes and weights, but their structure and design are not suitable for the treatment of OTR tires as considered in the present invention.

PURPOSES OF THE INVENTION

The purpose of the present invention is to overcome and obviate, at least partially, the drawbacks and operating limits of the prior art mentioned above. More particularly, a purpose of the present invention is to make available an integrated mobile unit entirely built in on a trailer able to implement the three operating phases automatically one after the other with only the need of an operator that monitors the functioning of the entire work cycle.

A further purpose of the present invention is to obtain a mobile unit capable of performing all the three work steps described in an automated way and which is easily transportable even for long distances, in order to reach the storage centers of the OTR tires located at the mining centers.

A further purpose of the present invention is to optimize by reducing the working times of the entire working cycle, by improving the safety of the individual working operations and minimizing the manual intervention of the operator. Another purpose is to provide a means with a high degree of reliability and resistance over time.

It is still a purpose of the present invention to implement an automatic processing method which makes the preliminary mechanical treatment process of OTR tires efficient and optimized and safer for obtaining parts of smaller size compared to the prior art.

BRIEF DESCRIPTION OF THE INVENTION

The object of the present invention is a mobile unit for the preliminary treatment for the recovery of OTR tires comprising a trailer on the platform of which a central unit is provided which is configured to carry out a first treatment step which alternates a cutting and rotation operation of the tire to be treated, said central unit being configured to cut the tire to be treated along the equatorial plane, said tire being previously housed vertically on said central unit so as to divide it into two tire halves when in use, a first treatment group being provided on the trailer in front with respect to the central unit and a second treatment group being provided on the trailer rearward of the central unit, said treatment groups being each configured to carry out a second treatment phase which alternates a radial cutting operation along a cutting axis and rotation of the tire halves to be treated, each of said treatment groups comprising means for receiving the corresponding tire half in a horizontal position and allowing the predetermined rotation of the corresponding tire half and a cutting unit comprising a rotating blade, in particular a shearing blade configured for cutting in a radial direction according to predetermined cutting axes and for simultaneously cutting a predetermined portion of bead of the corresponding tire half to be treated, by dividing the tire half into a plurality of slices when in use and further embodiments thereof described in the present invention.

A further object of the present invention entails a method of use of a unit for the pretreatment of OTR tires which provides for automatically carrying out the following work phases one after another:

- a first phase in which the tire to be treated is cut in two halves along its equatorial plane;

- a second phase in which a radial cut is carried out simultaneously on each tire half for the division of the tire half into slices and a circumferential cut made near a portion of the bead from each corresponding slice.

It must be noted that the mobile unit and the method of the present invention permit to obtain, starting from an OTR tire, a plurality of rubber slices of the tire, suitable to be shredded as being completely separated from the bead which remains integral and is immediately available for further recovery operations.

BRIEF DESCRIPTION OF THE FIGURES The constructive and functional characteristics of the mobile unit object of the present invention can be better understood from the detailed description that follows, in which reference is made to the attached drawing tables which represent some preferred and non-limiting embodiments, in which: figure 1 is a side view of the mobile unit object of the present invention during handling; figure 2 is a top view of the mobile unit object of the present invention during handling; figure 3 is a side view of the mobile unit object of the present invention during the first processing phase of an OTR tire; figure 4 is a section of the mobile unit object of the present invention during a first processing phase of an OTR tire; figure 5 is a view of the tire being cut during the first processing phase; figure 6 is a view of the tire cut in two halves at the end of the first processing phase; figure 7 is a side view of the mobile unit object of the present invention during a second processing phase of an OTR tire; figure 8 is a top view of the mobile unit object of the present invention during the second processing phase of an OTR tire; figure 9 is a top view of the tire at the beginning of the second processing phase 25 of an OTR tire; figure 10 is a top view of the tire at the end of the second processing phase of an OTR tire; figures 11 and 12 are side views of another embodiment of the mobile unit object of the present invention during a first processing phase of a respective r ^r irniv me, figures 13 and 14 are top views of a portion of the mobile unit of figures 11 and 12 during the second processing phase of respective OTR tires; figures 15 and 16 are detailed views of a portion of the mobile unit of figures 11-14 in respective operating conditions. To facilitate understanding, the same reference numbers where used wherever possible, in order to identify the same common elements in the figures ft is noted that elements and features of embodiments can be conveniently combined or integrated within other embodiments without further clarification.

DESCRIPTION OF EMBODIMENTS

Reference is now made in detail to possible embodiments of the invention, one or more examples of which are shown in the annexed figures in an exemplary and non- limitative way. Also phrases and terms herein used are made for exemplary and non-limitative purposes.

With reference to Figures 1 to 10, embodiments are described with some variant details of a mobile unit, in accordance with the present invention.

In figure 1 and 2 the mobile unit of the present invention is illustrated during handling; it includes a trailer 1, preferably of the swan-neck type then equipped with a suitably dimensioned lowered bed to support the load. As can be seen from the figures, the overall dimensions easily allow the movement of the unit on any type of road or path, as in fact during the movement the unit is completely closed, since all the structures/equipment can be included within the overall dimensions both in width and in height of the drive unit, without the need to carry out exceptional or special transports in a safety way.

The mobile unit object of the invention substantially foresees two automatic working phases one after the other:

- a first phase (figs. 5 and 6) in which the tire 4 to be treated is cut in two halves along its equatorial plane;

- a second phase (figs. 9 and 10) in which on each half tire 42 two cutting operations are simultaneously carried out, a radial cut for the subdivision of the half in spices and a circumferential cut for cutting a bead portion of the relative slice. In other words, such circumferential cutting separates a bead portion 40 from a tire half 42 and at the end of said second phase the bead 40 is integral, without being divided or radially cut, and is completely separated from the respective tire half 42 divided in slices.

As can be seen in figures 1, 2, 3, 11, 12, 13, 14 above the trailer 1 a central unit 2 is provided, which has two hinged arms 20, one placed frontally with respect to the trailer 1 and the other one placed at the rear with respect to the trailer 1. Each arm 20 can be hinged to a respective support structure which in some embodiments is mounted in a sliding manner on a guide integral with the trailer 1. On each support structure at least one hydraulic jack can act, or another suitable linear hydraulic actuator, in order to move the same along the guide and hence along the trailer 1. Furthermore, to each support structure means for detecting the position of the support structure can be associated, for example with respect to a fixed point of the trailer 1. Such structure permits to move in a selective way the support structures of the arms 20 and hence the arms 20 horizontally along the trailer 1, for example at least as a function of the size of the tire 4 to be treated.

In some embodiments, each arm 20 is provided with a roller 21, freely rotatable about its own axis and the position of which with respect to the corresponding arm 20 is variable along the longitudinal direction of the arm 20 itself at least depending on the size of the tire to be treated. In this embodiments, the central unit 2 also has possibly motorized rollers 23, preferably two, located on the sides of a preferably concave seat 22 (see fig. 4), said seat 22 being suitable for receiving and resting the tire to be treated in a stable vertical position.

In other embodiments, with reference to figures 11 to 16, each arm 20 is provided with a motorized head 50, comprising pick-up means 51 suitable for catching the tire 4 by acting on the inner circumference at the bead 40 of the same. In particular, such pick-up means 51 can comprise an expansion gripper, comprising one or more jaws 52 selectively moved towards opposite directions and shaped in order to catch the inner circumference of the bead 40 (figures 11, 15 and 16). In this embodiments, each motorized head 50 is rotated about its own rotation axis R through suitable motor means (not shown). Furthermore, in this case the seat 22 on which the tire 4 is placed is selectively moved in a substantially vertical direction, for example according to the size of the tire 4 to be treated. In particular, such structure permits to bring the tire 4 to be treated up to a suitable height for aligning its center with a rotation axis R of the motorized heads 50 of each arm 20. In a purely exemplary way, with reference to figures 11 to 14, should a first tire 4 be treated, the seat 22 is moved in the vertical direction (upwards or downwards) until reaching a height suitable for aligning the center of said tire 4 with the rotation axis R of each motorized head 50 (figs. 11 and 13). Therefore when a second tire is treated, for example with a size lower than that of the first tire, the seat 22 is moved upwards until reaching a height suitable for aligning the center of the second tire 4 with the rotation axis of each motorized head 50 (figs. 12 and 14).

In embodiments, the central unit 2 can further comprise one or more safety arms 60 placed in front and rear of the seat 22. These safety arms 60 can be selectively moved by means of one or more hydraulic jacks to bring them from a position of rest at a gripping position in which they contact the tire 4 to be treated at the bottom lying on the seat 22. The central unit 2 also provides a blade 24 which during the operation rises and falls and therefore moves along a vertical direction perpendicular to the platform of the trailer 1 and suitable for cutting the tire to be treated along the equatorial plane during the first processing phase.

Once the mobile unit is placed in working condition, i.e. with the stabilization cylinders of the trailer 2 lowered, the work cycle can be carried out.

The first processing phase (figs. 3 to 6) provides for the vertical positioning of the tire 4 to be treated above the seat 22 and of the rollers 23 in such a way that the equatorial plane of the tire 4 is perpendicular to the rollers 23 and in particular that the center line of the tread 41 and therefore the equatorial plane of the tire 4 is in correspondence with the blade 24. Subsequently the arms 20 are raised being hinged to the central unit 1 until they contain the tire 4 to be treated laterally.

In embodiments, each idle roller 21 is positioned in contact with the circumference defined by the corresponding bead at its lowest point.

In other embodiments, each motorized head 50 is positioned inside the circumference of the bead 40 of tire 4 to be treated which is grabbed by means of grabbing means 51. In particular, in embodiments, the jaws 52 are moved in order to fasten the tire 4 to the respective motorized head 50.

Finally, the raising of the blade 24 is actuated for cutting a corresponding equatorial portion of the tire 4 and subsequently it is lowered to the rest position, in such a way that it can actuate for a predetermined time the corresponding motorized rotation of the tire.

In some embodiments, said rotation can occur through the rollers 23 of the central unit 2, if motorized.

On the other hand, in other embodiments this rotation takes place through the rotation of the motorized heads 50 provided on the arms 20 and which grip the tire 4 around the respective rotation axes R. In particular, in this first processing phase the rotation axes R of the motorized heads 50 are coincident and said motorized heads 50 rotate in a coordinated manner to cause rotation of the tire 4 in one direction or the other.

Said rotation takes place in such a way as to propose a subsequent equatorial portion still to be cut of the tire 4. The alternating rotation and cutting process ends when the entire tire 4 has been cut along its equatorial plane, and then the tire is made divisible into two tire halves 42.

The operator actuates all the cutting phases of the tire 4 with a remote control console (not visible in the drawings), then at a safe distance.

To implement the second processing phase (figs. 7 to 10) treatment groups 3 are mainly used and also located above the bed of the trailer 1 at the opposite sides of the central unit 2

In particular, in embodiments a first treatment group 3 is provided on the trailer 1 in front of the central unit 2 and a second treatment group 3 is provided on the trailer 1 behind the central unit 2.

Each treatment group 3 provides a roller support structure 302 configured to support means 30 to receive the corresponding tire half 42 in a horizontal position and allows its predetermined rotation. Said means 30 preferably consist of two rollers sets 30, the one opposite to the other with respect to the roller support structure 302, as well as translation means 32 which allow the reciprocal approach of the roller sets 30 when the mobile unit object of the invention is in motion to be transported to a work site, and which allow its mutual removal when the treatment group 3 is in working conditions. Connected to the roller support structure 302 is a cutting unit 33 comprising a housing structure 332 also positioned on the bed of the trailer 1.

Said housing structure 332 comprises a rotating blade, for example a shear 330 and a fixed counter-blade 331 arranged at such a height to be placed below the tire half 42 to be cut into slices 43 during its working phase. In embodiments, the roller sets 30 provide a plurality of motorized rollers 300 parallel to each other and some directional rollers 301 are also possibly motorized and angled relative to the rollers 300 and allow the rotation of the tire half 42 to be machined by lying it onto the corresponding pair of roller sets 30 as shown in figure 8.

In other embodiments, the roller sets 30 have a plurality of idle rollers 300 possibly angled to each other and which allow the rotation of the tire half 42 to be processed lying onto the corresponding pair of roller sets 30 as visible in Figures 13 and 14. The shear blade 330, hinged to rotate for cutting operations around axis 333, has a "T" shape and provides a concave profile blade for heel separation 3300 to conform to the curvature of the bead 40 and therefore to make a circumferential cut, which moves near a portion of bead 40, and a blade for cutting slices 3301 with a straight profile and perpendicular to the blade for cutting the bead 3300 to make a radial cut, as visible in figures 9 and 10.

The blade for cutting the bead 3300 can have a height greater than the blade for cutting the slices 3301 as it during the cutting operation must move near the bead 40 at the same time as the cutting blade 3301 reaches the edge of the tread half 41 when in use.

In preferred embodiments, each housing structure 332 is selectively movable along the trailer 1. For example, the housing structure 332 can be slidably mounted on a guide integral with the trailer 1 and can slide thereon, moved by selectively actuable hydraulic jacks.

Furthermore, each treatment unit 3 can comprise means for detecting the position of the housing structure 332, for example with respect to a fixed point of the bed 1 or with respect to the rotation axis R of a respective motorized head 50. This configuration allows to position correctly the shear blade 330 along the trailer 1 in relation to the size of the tire 4 to be treated so that the blade for bead separation 3330, in use and during a circumferential cut, moves near the bead 40 of the tire half 42 (see figure 13 and 14). In this way, the correct separation of the bead 40 from the tire half 42 is guaranteed without cutting it cleanly in the radial direction.

The second processing phase involves the positioning each of the two tire halves 42 in a horizontal position, due to the progressive lowering of the arms 20, above the corresponding roller sets 30 which in turn are in the working position or are at a maximum distance between them due to the translation means 32.

In embodiments, in this position the idle roller 21 remains in contact with the corresponding bead 40 of the tire half 4 to be treated, so guiding the rotation of the tire half 42 correctly.

In other embodiments, in this position the motorized head 50 remains in contact, or in engagement, with the corresponding bead 40 of the tire half 42 to be treated by means of the gripping means 51 , guiding in the correct way the rotation of the tire half 42

In fact, it should be noted that each arm 20 has the additional function of containing the tire 4 to be treated laterally not only during the first working phase, but also to allow the corresponding tire half 42 to be positioned safely in a horizontal position on the corresponding means 30/roller sets 30 when in use.

In fact, as already mentioned, each arm 20 provides either an idle roller 21 or alternatively a motorized head 50, capable of coming into contact with at least one point of the circumference defined by the corresponding bead 40 of the tire 4 placed in a vertical position above the central unit 1 during the first working phase.

For example, said roller 21 being slid along the arm 20 can further come into contact with the upper point of the circumference defined by the corresponding bead 40 of the tire 4 placed in a vertical position above the central unit 1 before the start of the second working phase.

Or again, said motorized head 50, having gripping means 51, grasps the internal circumference at the bead 40 of the tire half 42 placed in a vertical position above the central unit 2 before the start of the second working phase. The lowering of the shear blade 330 is then activated, by rotating it downwards, along a first cutting axis 44, by making the cut through the mutual action of said shear blade 330 and of the fixed counter-blade 331.

In embodiments, said rotation occurs by activating a hydraulic jack, or similar hydraulic actuator, hinged on one side to the housing structure 332 and on the other to the shear blade 330 which in turn is hinged to said housing structure 332.

Once the cut has been made, a cut of a first side of a slice 43 along the cutting axis 44 is obtained in a radial direction and the separation from said slice 43 of a portion of the bead 40 corresponding to the length of the profile of the blade for bead cutting 3300 will be obtained. Then the tire half 42 of a predetermined portion corresponding to a second cutting axis 44 is rotated.

In embodiments, such rotation occurs due to the effect of the rollers 300 and of the directional rollers 301 which can be motorized.

Alternatively, this rotation takes place by means of rotation about a respective rotation axis R of each motorized head 50 gripping the internal circumference at the bead 40 of the respective tire half 42 (figs. 13 and 14).

Once such rotation has occurred , the shear blade 330 is again actuated in order to perform the cut along the second cutting axis 44, so creating the first slice of tire 43. The alternate rotation and cutting procedure ends when the entire or half tire 42 is completely divided into slices 43 of a predetermined size, separated from the bead 40 which remains integral, and ready to be transported by other means for subsequent treatments.

In some embodiments, upstream of said first work phase and of said second work phase a regulation phase can be provided, in which the operator communicates to the mobile unit the size of the tire 4 to be treated and according to such size arms 20, seat 22 and housing structures 332 are automatically moved along their respective directions of motion in order to permit the correct execution of the subsequent (first and second) work phases. Furthermore, the size of the slices 43 is predetermined or in any case can be set, at least as a function of the dimension or size of the tire to be treated and can be set by the operator on the software that manages the mobile unit object of the invention at the beginning of the processing, by the use of the flexible mobile unit as it is suitable for reducing the tires of wheel loaders, large agricultural tires and small mine dumpers.

The processing time of each single tire was calculated on the basis of the largest production tire of 63", with the minimum reduction in terms of slices 43 and has a duration of around 20 min for the complete working cycle for each tire, thus preparing approximately 9,000 kg of rubber slices 43 for each working hour, ready for grinding. The three prior art machines can be used for times longer than 20 minutes just for the subdivision of the tire in two halves. The mobile unit object of the invention provides an external power supply unit, preferably not less than 200KVa.

Although the invention has been described above with particular reference to some preferred embodiments, given by way of example and without limitative purposes, numerous modifications and variants will be apparent to a person skilled in the art in light of the above description. The present invention therefore intends to comprise all the modifications and variants falling within the spirit and protective scope of the following claims.

In the claims that follow, references among parentheses have the only aim to facilitate the reading and must not be considerd as limitative factors regarding the protection field comprised within the specific claims.

LIST OF REFERENCE NUMBERS

1 trailer,

2 central unit, 20 arm, 21 roller, 22 seat, 23 motorized rollers, 24 blade

3 treatment groups , 30 roller sets, 300 rollers, 301 directional rollers, 302 roller support structure, 32 travel means, 33 cutting unit, 330 shear blade, 331 counter blade, 332 housing structure, 333 axis, 3300 blade for bead cutting, 3301 blade for cutting slices.

4 tire, 40 bead, 41 tread, 42 half tire, 43 tire slices, 44 cutting axle.

50 motorized head, 51 gripping means, 52 jaws

60 safety arms R rotation axis