CONVEYOR SYSTEM CHANGER USING A TUBULAR LINEAR INDUCTION MOTOR FIELD OF THE INVENTION The present invention is directed to a conveyor system via changer for controlling the movement of the conveyor between two movement paths, and, in particular, to a changer of track that employs a tubular linear induction motor to move the mechanism of the track changer. BACKGROUND OF THE INVENTION Conveyor systems, such as power and free systems, typically have multiple paths that are connected together, wherein a track changer plate is used that travels between a first position and a second position to direct a Article transported from one path to another. The track changer plates typically comprise a rotary-way changer member having upper and lower tabs at one end, and a pulse arm at the other end, wherein the upper and lower tabs are adapted to abut flanges of inferior and superior trajectory to cause an article to be diverted to the appropriate trajectory. In this way, the track changer plate operates to move between a first position and a second position, to deflect the transported article from one path to another, similar to a maneuvering plate in a railway system. Various types of conveyor belt changer, such as that described above, have been used in conveyor systems in the past, including the type shown in US Patent No. 4,542,698. This patent discloses a track changer driven by a hydraulic device. A problem with previous systems of this type, however, is the complexity of the pipe, supply systems and compressors for the operation. Another problem is the large amount of maintenance required to keep such systems in operation. In view of the disadvantages of prior conveyor trackchangers of the type described above, the need to provide an improved track changer has been developed. The present invention solves the problems mentioned above through the use of a tubular linear induction motor as the via changer device. The present invention also contemplates using an assembly and / or connecting means to provide precise arc-shaped movement of the changer member by rotating it. SUMMARY OF THE INVENTION The present invention represents an improvement over prior conveyor trackchangers, and in particular, conveyor trackchangers such as those directing a conveyor component in motion between two motion paths, the changer includes a changer tongue moved between a first position and a second position by a changer device. As in prior conveyor track exchangers, the present invention functions to divert conveyor components such as carts, to one of two paths, wherein a rotary member of the track changer has upper and lower members for engaging in upper and lower flanges of the path provided to cause the conveyor components to be diverted. In one aspect, the present invention represents an improvement over the previous designs of a track changer as it comprises a tubular linear induction motor as a track changer device for moving the changer member between a first position and a second position. The linear induction motor preferably comprises a stationary primary, which can be provided with fins for better heat dissipation, and a mobile secondary, such as a metal rod, which extends linearly within the stationary primary. In this regard, the linear movement of the bar through the primary, from the retracted position to an extended position, and vice versa, is preferably induced by a magnetic sweep field along the primary, where the magnetic field interacts with currents induced within the secondary to provide a force of rod movement. By reversing the sweep of the field, the direction of movement of the bar can be reversed. The linear induction motor has fewer moving parts, is easier to maintain and avoids the need for complicated hydraulic or pneumatic piping systems. The induction motor of the present invention may also be provided with one or more retention windings which may be employed to retain the secondary in a given position. For example, the rebound winding can be used on one side of the primary to hold the secondary in the extended position, where the tongue members would be placed to cause the article to move along a path. Another rebound winding can also be supplied on the other side of the primary to hold the reed members in the retracted position, where the reed members would then cause the article to move along another path. The rewind windings make it possible so that the linear induction motor does not have to be continuously energized. Energizing the linear induction motor for a short period of time only, the life of the linear induction motor is increased and the heat generation of the motor is decreased. The track changer member may also include control components for interconnecting the track changer with other components of the conveyor system and the respective control features. The track changer member of the present invention preferably rotates around a single point. Therefore, the link between the track changer member and its movement mechanism moves along a precise path, which is in contrast to the linear movement of the drive rod moving between the extended and closed positions. retracted In this regard, the track changer of the invention is preferably adapted so that precise movement of the link is ensured for one of several mounting and / or connecting means, where the lateral load of the impulse bar can be avoided (which can cause abnormal wear to occur when the track changer is activated repeatedly). In one embodiment, the track changer engine is allowed to rotate as the thrust rod moves between the extended position and the retracted position. In this regard, the motor is preferably mounted on a plate having a pivot bolt extending therefrom, wherein the pivot bolt is connected to a mounting frame with a low friction plate extending between them. . In this embodiment, the pivot bolt preferably has its vertical axis extending through the center of the thrust rod, so that no eccentricity is created between the pivot bolt and the rod when the engine rotates. In another embodiment, the track changer motor is mounted on a vertical pivot with the pivot pins extending over and under the motor to allow the motor to rotate. The entire motor together with the pivot tube is allowed to rotate in response to the actuation movements of the track changer motor. The pivot pins of this embodiment also have their vertical axis extending through the center of the impulse rod for similar reasons. In another embodiment, the impulse bar is provided with a coupling that allows the distal end of the bar to move freely relative to the rest of the bar. In this regard, the coupling is able to separate the movement of the link from the bar, so that as long as the portion of the impulse bar within the primary moves linearly, the end of the bar connected to the link can be moved along of a course of action. In another modality, the track changer motor is mounted in a mounting frame, and a guide bar is provided to maintain the drive rod along a path of movement. The connection between the pulse bar and the track changer member is preferably provided with a slot, to allow the link to move relative to the bar, so that the link can follow the actuation path, while the link bar follows a linear path. The four modes mentioned above are examples of how the link actuating movements can be considered in the present invention. Another form, not mentioned therein, which provide similar functions, are also contemplated within the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIGURE 1 shows a distribution of the conveyor paths and the track changer member and the motor of the present invention; FIGURE 2 shows a side view of the track changer assembly of Figure 1 ved from the tracks to show more details; FIGURE 3 shows the tubular linear induction motor of Figure 1 with more details in perspective; FIGURES 4 (a) and (b) show a plan view and side view, respectively, of a first mounting embodiment of the present invention for accommodating the arcuate movement of the track changer member; FIGURES 5 (a), (b) and (c) show a plan view, side view and front view, respectively, of a second embodiment of the present invention for accommodating the arcuate movement of the track changer member; FIGURES 6 (a) and (b) show a plan view and a side view, respectively, of a third embodiment of the present invention for accommodating the arcuate movement of the track changer member; and FIGURES 7 (a), (b) and (c) show a plan view, a side view and a front view, respectively, of a fourth embodiment of the present invention for accommodating the arched movement of the changer member. of track. DETAILED DESCRIPTION OF THE INVENTION Figure 1 shows the track changer assembly 10 for an inverted free power system illustrating one embodiment of the present invention. In general, these systems comprise a power path and a free path. A chain moves in the power path and conveyors that support a transported article, for example, a skate or carrier for a car body, etc., move in the free path. The chain is moved by a motor, the chain, in turn, moves the conveyors by means of a chain clamping piece. Power and carrier-free systems are well known in the art and a detailed description thereof is not considered necessary for the understanding of the present invention. While the track changer of the invention is exemplified for an inverted free and power system, it should be understood that the present invention is not limited to use in such systems. The higher power and free systems can also use the track changer, as it can in other conveyor systems, whereby a conveyor component travels in a path, for example, a rail, or the like, and requires redirection to another path or rail. Figure 1 shows an embodiment of a first path 1 extending substantially linearly, and a second path 3 connecting and extending tangentially to the first path 1. Paths 1 and 3 define three paths of movement. The first path, 5, extends along path 1, and is oriented to the left of the track changer assembly 10. This is the path in which the transported article travels before it arrives and is diverted by the assembly. of track changer 10. The second path, 7, also extends along path 1, but is oriented to the right of the track changer assembly 10. This is the path taken by the transported article after the The track changer assembly 10 has been moved to the position shown in shot in Figure 1. The third track, 9, extends along the track 3, and is oriented to the right of the track changer assembly 10. This is the path taken by the article transported after the track changer assembly 10 has been moved to the position shown with solid lines in Figure 1. Tracks 1 and 3 themselves are of conventional design. and preferably and preferably comprise two channel-like structures, 17, 19, positioned on the sides, with the face openings to each other. In this way, the conveyors having rollers are preferably supported by and travel within the spaces between the opposed channels., 19, being this, along the free path. At the intersection of trajectories 1 and 3, flange 40 of channel 19 (or path 1) and flange 2 of channel 17 (or path 3) are preferably cut at 44,46 to allow conveyors traveling at length of the first path 5 to be diverted either to the second path 7, or to the third path 9. The cutting areas 44, 46 of the flanges 40, 42 allow the conveyors to travel past the intersection, to any path, as is determined by the track changer assembly 10. Again, this is only an example of a track system in which the present invention can be used. The track changer assembly 10 comprises a track changer tab 11 having an upper tab portion 21 and a lower tab portion 22. These tab portions 21, 22 are adapted to abut the top and bottom flanges of the channels 17 and 19 in the path 1, along the first path 5, to replace the trimmed areas 44 or 46, so that when the conveyors reach the track changer assembly 10 they are deflected by the tongue portions 21 and 22 either to the second path 7, the third path 9, depending on which position the track changer assembly occupies 10. As indicated above, when the track changer assembly 10 is in the position shown by solid lines, the conveyors they automatically deviate to the third path 9. And when the track changer assembly 10 is in the position shown in shot, the conveyors are automatically they go to the second path 7. The tongue of the track changer 11 is part of a total track changer member 13, shown in Figure 2, capable of being rotatably mounted at the pivot point 14. The track changer member 13 is preferably secured by an odo that substantially rotates substantially from a horizontal plane. This ensures that the tongue portions 21 and 22 properly face the appropriate channel flanges to allow the conveyors to be properly deflected. At the other end of the track changer member 13, which extends out of the tongue of the track changer 11, this being, on the other side of the pivot point 14, is an extended pulse arm 25 which acts as an arm at the moment to allow the track changer member 13 to be rotated. Preferably, a distal end 35 of the pulse arm 25 extends a predetermined distance from the pivot point 14, so that the moment arm can easily rotate the track changer member when a force is applied to it. The distal end 35 of the pulse arm 25 is preferably linked to the pulse assembly 27 to drive the movement of the forward changer member 13. Preferably, the pulse assembly 27 comprises a tubular linear induction motor 29, as shown in FIG. shown in Figure 3, which acts as the driver of the track changer to move the track changer member 13 between the first and second positions. The linear induction motor 29 comprises a stationary primary 31 and a moving secondary 33. The stationary primary 31 is preferably made from a series of interconnected coils housed in an assembly, such as one manufactured from cold-rolled steel, wherein the coils of the motor are wound on coils. The stationary primary 31 may be provided with fins 48 for better heat dissipation if desired. The movable secondary 33 may be a metal bar, such as copper-coated steel, and preferably extends linearly within the primary 31, and is capable of moving therein. The tubular linear induction motor 29 operates preferably under the principles of electromagnetic induction. The linear movement of the movable secondary 33, between the extended position and the retracted position, is induced by a magnetic swept field along the coils. The magnetic field interacts with induced currents within the secondary 33 to provide a driving force therein. Reversing the sweep of the field reverses the direction of movement of the secondary 33. The secondary 33 is preferably moved relatively quickly, silently and powerfully between the retracted and extended positions, to the activation of the motor 29, using any conventional type of control connected to the engine. The movable secondary 33 is preferably operatively coupled to the distal end 35 of the driving arm 25 via the link 18 (and a stirrup-shaped part 61 as shown in Figures 4 to 7). Accordingly, by activating the motor 29 and causing the secondary 33 to move linearly within the primary 31, between the retracted and extended positions, the member of the track changer 13 is moved from a first position to a second position, and vice versa. In this manner, the track changer member 13 can be used to deflect the component of the conveyor, so that it moves either on the second path 7, or the third path 9, as determined by the track changer. As shown in Figure 1, with the secondary 33 in the extended position, the track changer member 13 allows movement of the conveyor component, eg, a conveyor, along the first path and the third path. The fact of retracting the movable secondary 33 within the stationary primary 31, however, allows movement of the conveyor component along the first 5 and second paths 7. The tubular induction motor 29 may be provided with one or more rewind windings that can be employed to retain the secondary 33 in a given position. For example, a retention spool can be used on one side of the primary 31 to hold the secondary 33 in the extended position, where, in the embodiment shown, the tongue members 21, 22 would be held in the first position (shown with lines solid) to cause the article to move along the third path 9 shown in Figure 1. Another retention coil can also be provided on the other side of the primary 31 to hold the tongue members 21, 22 in position retracted, wherein the tongue members 21, 22 would be held in the second position (shown in shading) to cause the article to travel along the second path 7 shown in Figure 1. Since the moving secondary 33 can be extended or retracted when the motor 29 is activated, these retention coils make it possible for the induction motor not to be continuously activated in order to retain the secondary 33 in a given position . Activating the engine only for a short period of time, the life of the engine is increased and the generation of heat in the engine is minimized. Because the track changer member 13 of the present invention revolves around a single point 14, and moves along a horizontal plane, the link 18 between the track changer member 13 and its drive mechanism 27 travels along an "arched" path, as shown in Figures 4 to 7. On the other hand, the motor of the track changer, which in this case is the linear induction motor 29, comprises a bar impulse 33 that moves "linearly" between the extended and retracted positions. For this reason, the present invention is preferably adapted so that the arched movement of the link 18 (connecting the impulse bar 33 with the track changer member 13) is due to one of the connecting and / or mounting means . In this regard, the present invention is preferably adapted to take into account the different ways in which the track changer member 13 and the driving rod 33 move, so that the lateral loading of the driving rod 33 ( which can cause abnormal wear to occur) can be avoided. In the first mounting mode shown in Figures 4 (a) and (b), the motor of the track changer 29 is rotatably mounted so that the entire motor 29 is allowed to rotate as the push rod 33 moves between the extended and retracted positions. The motor 29 is preferably mounted directly on a plate 60, such as one made of steel, and a post 62 preferably extends below it, wherein the pivot post 62 is rotatably connected to a mounting frame 64. , preferably using a lock nut and washer with nylon insert 66. A low friction slide plate 68, such as one made of UHM, also preferably extends
'between the plate 60 and the frame 64, to allow the surfaces to slide together. In this embodiment, the pivot post 62 preferably has its vertical axis extending upwardly through the center of the push rod 33, where no eccentricity would be created between the pivot post 62 and the impulse rod 33. when the motor 29 is rotated. The link 18 is also preferably extended along a vertical axis and rotatably positioned within the bracket 61 extending from the bar 33 to allow the distal end 35 of the pulse arm 25 to rotate (along a horizontal plane) in relationship with the push rod 33. In the second mounting mode shown in Figures 5 (a), (b) and (c), the motor of the track changer 29 is mounted on a shaft tube 70 with bolts 71 that they extend above and below the tube 70 to allow the motor 29 to rotate. The bolts 71 are rotatably mounted on mounting frames 72 on and below the engine 29 using pivot nozzles 73. the engine 29 is preferably secured within the axle tube 70 by means of the mounting plate 74, and the entire engine 29 (with the axle tube 70 therearound) it is allowed to rotate in response to the movement of the link along the arcuate path shown in Figure 5. The axle pins 71 in this embodiment also preferably have their vertical axes extending through the center of the push bar 33, and the link 18 also extends along a vertical axis to allow the distal end 25 to rotate relative to the push rod 33. In the third embodiment shown in FIGS. Figures 6 (a) and (b), linear path of bar 33), as the member moves
the track changer motor is mounted directly on a mounting frame 80, but the push rod 33 is provided with a coupling 81 extending near its distal end 82 (which is connected to the link 18). Coupling 81 is preferably what is often referred to as misaligned coupling which allows a predetermined degree of movement between a member (to which it is connected at one end), and a second member (to which it is connected at the other end). In this case, the coupling 81 is connected between the distal end 82 of the push rod 33 and the base of the push rod 33, so that the distal end 82 can move operatively relative to the base. The coupling 81 is able to allow the link 18 to move relative to the push rod 33, so that the base portion of the push rod 33 can be moved linearly, while the distal end 82 can be moved to along the arched path. The degree to which the coupling 81 is allowed to move along the horizontal plane depends on the length of the pulse arm 25 (this being the radius of the arcuate path), and the degree to which the changer member rotates. track 13 along a horizontal plane. The distance "x" shown in Fisnra 6 (a.P. la di stapri a rme > p > 1 extended). Slot 92 is large enough to allow link 18 to move a sufficient distance to allow link 18 to follow the arcuate path, while bar 33 follows a linear path along guide bar 90. These modes represent shapes examples in which the present invention can be carried out for the arcuate movement of the track changer member 13. It should be understood, however, that other shapes are possible, which are not specifically disclosed herein, which provide similar functions, and which are within the scope of the present invention. The track changer of the present invention offers significant improvements to the existing track changer for conveyor systems, particularly those that employ pneumatic and hydraulic components. First, the need for complicated water and air systems is eliminated. Second, an electric actuator, such as the one of the present invention, is ideally suited for many conveyor systems, since the systems themselves typically have electrical power (and not hydraulically or pneumatically). Third, the use of the tubular linear induction motor eliminates the need for components to convert the rotary movement of an electric motor to linear motion. Fourth, electric motor 29 has no moving parts other than secondary 33 so maintenance requirements are reduced. Fifth, the motor 29 is relatively quiet during operation (compared to pneumatic actuators which are relatively noisy). Sixth, the holding coils can hold the secondary 33 in a given position without having to expend power to hold it in place. Seventh, the linear movements of the secondary 33 in relation to the arcuate movement of the track changer member 13 will not result in lateral loading of the secondary. The present invention provides a novel conveyor track changer and has been disclosed in terms of preferred embodiments thereof. However, several changers, modifications and alterations in the disclosures of the present invention may be contemplated by those skilled in the art without departing from the scope of the present invention.