EP0365450A1 - Crossing with a movable point, and method for manufacturing such a crossing - Google Patents

Abstract

The present invention relates to a crossing block with a mobile point (1) for railway devices of very great length incorporated into the long welded rails, said crossing block comprising moreover a cradle (2) made of two elements (3 and 4), one cast and the other non-cast and a method for manufacturing such a crossing block. <??>Crossing block characterised in that the element (3) is made of cast steel, of which at least the two ends (3A and 3B) on the nose side and the two ends (3C and 3D) on the switch end side are shaped like a rail section, only the rail section of the two ends (3A and 3B), however, serving effectively for running, the non-cast element (4) being mainly constituted by pieces (5 and 5') which are made as a whole as rails and connected to the two ends (3C and 3D) on the switch end side of the cast piece (3), neither the rail section of the two ends (3C and 3D) nor the rail section of the pieces (5 and 5'), however, serving effectively as running surface, the mobile point (1) itself being made as a whole as rails, of which all the upper surfaces serve effectively as running surface. <IMAGE>

Description

The subject of the present invention is a crossing point with a moving point for very long railroad track apparatus incorporated in the long welded rails, said crossing point comprising, in addition, in particular a cradle in two elements, and a manufacturing method. of such a crossing heart.

We know that the increase in speed on railways, which today currently reaches 270 km / h and will soon reach 300 km / h, or even higher speeds, leads to the creation of very long track devices to ensure very high deflection speeds, of the order of 170 km / h to 220 km / h, or even more.

In these very long track devices, the crossings also have very long lengths and, at these speeds, it is known that it is preferable to use crossing hearts with a moving point, more comfortable than the hearts. of fixed point crossing, in which the counter-rails are at the origin of recalls of the axles of the vehicles, difficult to bear.

It is true that, for many years, crossing hearts with movable points have been built, but current constructions are not fully satisfactory.

Moving point crossing hearts generally have two basic elements:
- the cradle, in which the movable point is fixed in the heel and in which it moves when it is maneuvered;
- the movable tip proper.

The cradle is necessarily composed of several elements, because their respective length is limited by the current level of manufacturing means. We are therefore forced, to achieve the desired construction, to manufacture several elements, then to assemble them to form the cradle. As it is impossible, for constructive reasons, notably linked to a lack of space, to carry out this assembly by a conventional jointing which would keep the elements of the cradle inside and outside, an assembly is used by C-shaped pieces placed outside the elements of the cradle. However, such an assembly does not have the qualities of a jointing and even less the qualities of a weld, and whatever the care taken in the production of these C-shaped parts and in their assembly, this assembly will necessarily present, in the long term, holding difficulties.

In addition, the moving point, made of machined and assembled rails, is anchored in its heel in one of the elements of the cradle, like a console embedded in a wall.

Its flexibility thus allows it to rest on one of the tip elements of the cradle, in the right or left position, when it is operated by appropriate devices.

Due to the incorporation of these devices in the long welded rails, that is to say their connection to the framing rails, without expansion device, the anchoring of the movable point must ensure - in addition to the role of embedding from the console - a transfer of compression or tensile forces from each long welded rail from the movable point to the cradle.

Conventionally, the transfer of such forces is carried out by fishplates glued to the rail and to the core.

However, when a molded cradle element is used, the bonding of the parts making it possible to anchor the point in the cradle is certainly achievable on the movable point side, where there is a shape rail, but is not feasible on the cradle side due to its rigid box shape.

It is therefore necessary, to ensure the transfer of forces, to use a mechanical assembly whose reaction It requires a great deal of precision to reduce play and meet the constraints of incorporation into long welded rails.

We therefore find ourselves, in the current construction, in the presence of two mechanical adjustments which are difficult to carry out, which are liable to deteriorate in service and thus having a negative impact on the life of the product.

The general problem to be solved by the object of the present invention therefore consists in designing and manufacturing a crossing point with a moving point in which the drawbacks linked to these two mechanical assemblies are eliminated.

To this end, the subject of the present invention is a crossing point with a movable point for very long railroad tracks incorporated in the long welded rails, said crossing point further comprising in particular a cradle in two elements, one molded and the other not molded, crossing core characterized in that the molded element is made of steel, and comprises at least the two ends on the toe side and the two ends on the heel side shaped as a rail profile, but only the rail profile of the two ends on the toe side effectively used for rolling, the non-molded element mainly consisting of parts made entirely of rails and connected to the two ends on the heel side of the molded part, but neither the rail profile of the two ends on the heel side, nor the rail profile of the parts not actually serving as a rolling surface, the movable point being, in turn, produced integrally nt in rails of which all the upper faces effectively serve as a rolling surface.

• la figure 1 est une vue de dessus d'un coeur de croisement à pointe mobile, conforme à l'invention, ladite pointe étant située à droite :
• la figure 2 est une vue de face et en coupe, selon la ligne A-A de la figure 1 ;
• la figure 3 est une vue de face et en coupe, selon la ligne B-B de la figure 1 ;
• la figure 4 est une vue de face et en coupe, selon la ligne C-C de la figure 1 ;
• la figure 5 est une vue de dessus du coeur de croisement représenté figure 1, la pointe étant située à gauche, et où les deux pièces appartenant à l'élément non moulé et réalisées en rails sont en position écartée ;
• la figure 6 est une vue de face, à plus grande échelle, d un mode de liaison de l'élément moulé avec une pièce réalisée en profil de rail, appartenant à l'élément non moulé, et
• la figure 7 est une vue de face et en coupe, à plus grande échelle, selon la ligne D-D de la figure 6.

The invention will be better understood from the description below, which relates to a preferred embodiment, given by way of nonlimiting example, and explained with reference to the appended schematic drawings, in which:

• FIG. 1 is a top view of a crossing point with a moving point, in accordance with the invention, said point being located on the right:
• Figure 2 is a front view in section along the line AA of Figure 1;
• Figure 3 is a front view in section along the line BB of Figure 1;
• Figure 4 is a front view in section, along the line CC of Figure 1;
• Figure 5 is a top view of the crossing core shown in Figure 1, the tip being located on the left, and where the two parts belonging to the non-molded element and produced in rails are in the separated position;
• FIG. 6 is a front view, on a larger scale, of a mode of connection of the molded element with a part produced in rail profile, belonging to the non-molded element, and
• FIG. 7 is a front view and in section, on a larger scale, along the line DD of FIG. 6.

In accordance with the invention, and as shown in FIGS. 1 and 5 of the accompanying drawings, the crossing point with movable point 1 for very long railroad tracks incorporated in the long welded rails, furthermore comprises in particular a cradle 2 into two elements 3 and 4, one molded and the other not molded. Element 3 is made of cast steel, at least the two ends 3A and 3B on the toe side and the two ends 3C and 3D on the heel side are shaped as a rail profile, but only the rail profile of the two ends 3A and 3B effectively serving the bearing, the non-molded element 4 mainly consisting of parts 5 and 5 ′ made entirely of rails and connected to the two ends 3C and 3D on the heel side of the molded part 3, but neither the rail profile of the two ends 3C and 3D nor the rail profile of the parts 5 and 5 ′ not effectively serving as a rolling surface, the movable tip 1 being, in turn, made entirely of rails, all the upper faces of which effectively serve as a rolling surface.

According to the invention, the non-molded element 4 mainly consists of parts 5 and 5 ′ made entirely of rails and connected by welding or by an assembly not welded at the two ends 3C and 3D on the heel side of the molded element 3 ( see Figures 1 and 5 of the accompanying drawings).

According to a characteristic of the invention, the molded element 3 advantageously has all of its upper faces shaped as a rolling file.

It should be noted that a process is known for assembling by electrical welding crossing hearts made of austenitic hard manganese steel and rails made of carbon steel, by connecting them end to end, by means of a intermediate piece made of low carbon austenitic steel.

Thus, according to a preferred characteristic of the invention, the molded element 3 is made of austenitic manganese steel, the movable tip 1 and the parts 5 and 5 ′ being constituted by rails made of carbon steel.

It will therefore be possible to carry out the electrical welds, from the ends 3A and 3B of the molded element 3 to the running rails 7 of the intermediate connection path thanks to this known method. An intermediate piece made of austenitic steel will therefore be interposed between the ends 3A and 3B of the molded element 3 and the running rails 7.

According to another characteristic of the invention, and as shown in Figures 1 and 4 of the accompanying drawings, the parts 5 and 5 ′ in rail profile are two in number and are connected by gluing to the rails forming the movable point 1 by l 'intermediate of two spacers 8 and 8 ′ in splice profile.

As a result, the heel recess of the movable point 1 produced by the spacers 8 and 8 ′ glued, on the one hand, to the rails constituting the movable point 1 and, on the other hand, to the parts 5 and 5 ′ of the non-molded element 4 avoids the need for mechanical assembly and thus eliminates all the drawbacks associated with the use of such an assembly, in particular the longitudinal play.

As can be seen in FIGS. 2 to 4 of the appended drawings, the parts 5 and 5 ′ are secured, and the non-molded element 4 stiffened by means of plates 6.

The non-molded element 4, consisting of parts 5 and 5 ′ fixed to the ends 3C and 3D of the molded element 3 and rigidly connected by plates 6 therefore forms, with said molded element 3, a cradle 2 whose length n ' is more limited by foundry constraints.

According to an additional characteristic of the invention, the rails of the parts 5 and 5 ′ and of the movable tip can, for example, advantageously have a height of 172 mm.

Furthermore, according to a first variant, each part 5 and 5 ′ as well as the movable tip 1 could, for example, advantageously consist of a rail of profile UIC A 74. With regard to the movable tip 1, such a rail needle allows it to confer a significant vertical inertia.

However, it is also possible, according to a second variant, for each part 5 or 5 ′ to be able, for example, to advantageously consist of a rail of UIC profile 60, and the movable tip 1 of a needle rail of UIC profile A 74 , which also gives it a high vertical inertia.

The present invention also relates to a method of manufacturing a crossing point with a moving point 1.

According to the invention, and according to a first embodiment, the method of manufacturing a crossing point with a moving point essentially consists of welding, on the point side, the molded element 3 of the cradle 2 to the rolling rails 7 of the intermediate way of connection, and to be fixed on the molded element 3 of the cradle 2 of parts 5 and 5 ′ belonging to the non-molded element 4 of cradle 2, then to move said parts 5 and 5 ′ from their initial position towards the outside and keep them in the open position, insert between these pieces 5 and 5 ′ the moving tip 1, release the pieces 5 and 5 ′ so that they return to their initial position, then fix the pieces 5 and 5 ′ to the moving tip inserted between them, to stiffen the 'non-molded element 4, and finally to weld, if necessary, on the heel side, the movable point 1 to the running rails 9.

The manufacturing process takes place mainly as described below.

First, the tip side is welded, the molded element 3 from the cradle 2 to the running rails 7 of the intermediate connection path, as well as the two parts 5 and 5 ′, produced in rails, each in one 5A , 5′A of its two ends on one of the two ends 3C and 3D, heel side, also in rail profile, of the molded element 3. Each part 5 and 5 ′ consists of a rail to precisely allow welding with both ends 3C and 3D also in rail profile.

Then the molded element 3 is placed with its two parts 5 and 5 ′ and its two welded running rails 7, on an assembly table.

As shown in FIG. 5 of the accompanying drawings, the parts 5 and 5 ′ are then moved away from their initial position towards the outside, the parts 5 and 5 ′ being flexible from the weld zone with the molded element 3.

The parts 5 and 5 ′ are then maintained in the separated position (see FIG. 5) and the movable point 1 is lowered which is inserted into the cradle 2 formed by the elements 3 and 4, between the two parts 5 and 5 ′ in spread position. The movable point 1 is made of welded and assembled rails and is previously provided with two mounting spacers 8 and 8 ′ which are preferably fixed there by gluing. Then, the two parts 5 and 5 ′ are released to fix them to the spacers 8 and 8 ′ of the movable point, preferably by glued jointing.

Then plates 6 are fixed under the non-molded element 4, so as to secure the parts 5 and 5 ′ and thus to stiffen the non-molded element 4.

Finally, we descend the crossing core thus manufactured from the assembly table.

Subsequently, it will be possible, if necessary prior to mounting on the site, to weld the two ends 1B and 1C of the movable tip 1, opposite the pointed end 1A itself and shaped in a running file to the running rails 9.

On the site, such a crossing core can then be fixed to the sleepers and connected to the rails of the railway.

According to an additional characteristic of the invention, the welding, on the one hand, of the two ends 3A and 3B of the molded element 3 to the running rails 7 of the intermediate track of the connection and, on the other hand, of the two ends 5A, 5′A of the two parts 5 and 5 ′ at the two ends 3C and 3D of the molded element 3 is of the electrical type.

It will be possible to carry out, as indicated previously, the electrical welds, on the one hand, of the ends 5A and 5′A of the parts 5 and 5 ′ at the ends 3C and 3D of the molded element 3 and, on the other hand, of the ends 3A and 3B of the molded element 3 to the running rails 7 of the intermediate connection path using the known method. An intermediate part made of austenitic steel will therefore be interposed, on the one hand, between the ends 5A and 5′A of the parts 5 and 5 ′ and the ends 3C and 3D of the molded element 3 and, on the other hand, between the ends 3A and 3B of the molded element 3 and the running rails 7.

However, it is known, moreover, that the connection by welding of two rails to each other has the main advantage of eliminating the presence of a joint, this joint being detrimental to the strength of the railway under the effect of the shock of wheels on the surfaces of the rails ensuring the rolling. However, in the crossing core, object of the present invention, the two parts 5 and 5 ′ belonging to the non-molded element 4 of the cradle 2 and produced entirely in rails do not serve as a rolling surface. Under these conditions, the connection of these two parts 5 and 5 ′ to the molded element 3 of the cradle 2 can also be produced by an non-welded assembly, without having the drawback described above.

Consequently, according to an alternative embodiment of the method for manufacturing the crossing point with movable point 1, the parts 5 and 5 ′ belonging to the non-molded element 4 of the cradle 2 are connected to the molded element 3 of the cradle 2 by an unwelded assembly.

According to a second embodiment, in the manufacturing method according to the invention, the operations consisting in fixing on the molded element 3 of the cradle 2 parts 5 and 5 ′ belonging to the unmolded element 4 of the cradle 2, then to move said parts 5 and 5 ′ from their initial position towards the outside and to keep them in a separated position, to insert between these parts 5 and 5 ′ the movable tip 1, to release parts 5 and 5 ′ so that they return to their initial position, then to fix the parts 5 and 5 ′ to the movable point inserted between them and to stiffen the non-molded element 4, are replaced by the following operations:
- Attachment of parts 5 and 5 ′ to the movable tip 1 in order to form the non-molded element 4 of the cradle 2;
- stiffening of said non-molded element 4;
- Connection between them, by means of a non-welded assembly, of the two sub-assemblies thus formed, namely that formed by the molded element 3 welded to the running rails 7 and that formed by the non-molded element 4, -same formed by parts 5 and 5 ′ and the movable tip 1.

Consequently, firstly, the tip side is welded to the ends 3A and 3B of the molded element 3 of the cradle 2 the running rails 7 of the intermediate connection path. It will advantageously be a welding of the electric type.

Then the movable point 1 is placed on an assembly table and two movable spacers 8 and 8 ′ are fixed on the movable point 1, produced in machined and assembled rails, preferably by gluing. Then we fix the parts 5 and 5 ′ to the spacers 8 and 8 ′ of the movable point 1, preferably by glued jointing (the spacers 8 and 8 ′ are made up of joint profiles joined by welded bars; the joint profiles are glued, on the movable point side on said tip 1, and non-molded element side 4 to parts 5 and 5 ′, then bolted).

Then plates 6 are fixed under the non-molded element 4, so as to secure the parts 5 and 5 ′ and thus to stiffen the non-molded element 4.

The unmoulded element 4 thus produced is lowered from the mounting table.

The first subassembly is then placed, formed by the molded element 3 welded to the running rails 7 on an assembly table. The second sub-assembly, formed by the non-molded element 4, itself formed by the parts 5 and 5 ′ and the movable point 1, is, at this stage, approached the first sub-assembly by vertical transfer then longitudinal, or longitudinal then vertical, so as to end to end the molded element 3 of the cradle 2 to parts 5 and 5 ′ of the non-molded element 4 of the cradle 2.

Then we proceed to the assembly of the two ends 3C and 3D, heel side, in rail profile, of the molded element 3, respectively at the two ends 5A and 5′A of the two parts 5 made of rails.

This assembly connecting the two sub-assemblies together will be in the form of a bolted assembly, preferably a bonded joint. This, as well as all that follows, may also be valid in the variant of the first embodiment corresponding to 1 non-welded assembly of parts 5 and 5 ′ with the molded element 3.

Each end 5A or 5′A of the parts 5 or 5 ′ is therefore connected respectively to each end 3C or 3D of the molded element 3 by two ribs 10 joined by six bolts 11, three bolts 11 on the molded element side 3 and three bolts 11 on the part side 5 (see Figure 6 of the accompanying drawings).

These 10 ribs (four in total) will be glued in the jointing chambers by means of an adhesive consisting of a resin and a hardener each intervening for half in the composition of the adhesive. It may advantageously be the KLEBER E26-05 METALON glue manufactured by the company HENKEL. KLEBER resin and KLEBER hardener are thoroughly mixed before bonding.

In accordance with an additional characteristic of the invention, and as shown in FIG. 7 of the accompanying drawings, a glass cloth 12 is interposed between each splint 10 and, on the one hand, the ends 5A, 5′A of the parts 5 and 5 ′ and, on the other hand, the ends 3C and 3D of the molded element 3.

The ribs 10 will preferably be long enough so that the bonding surface, obtained from KLEBER glue and the glass cloth 12, allows the transfer of the tensile and compressive forces generated by the temperature variations in the long welded rails .

Finally, we descend the crossing core thus manufactured from the assembly table.

Subsequently, it will be possible, if necessary prior to mounting on the site, to weld the two ends 1B and 1C of the movable tip 1, opposite the pointed end 1A itself and shaped in a running file to the running rails 9.

On the site, such a crossing core can then be fixed to the sleepers and connected to the rails of the railway.

Of course, the invention is not limited to the embodiments described and shown in the accompanying drawings. Modifications remain possible, in particular from the point of view of the constitution of the various elements or by substitution of technical equivalents, without thereby departing from the scope of protection of the invention.

Claims (28)

1. Crossing point with movable point for very long railway tracks incorporated in the long welded rails, comprising, in addition, in particular a cradle (2) in two elements (3 and 4), one molded and the '' other unmolded, characterized in that the element (3) is made of cast steel, at least the two ends (3A and 3B) of the toe side and the two ends (3C and 3D) of the heel side are shaped as a rail profile, but only the rail profile of the two ends (3A and 3B) actually used for rolling, the non-molded element (4) mainly being made up of parts (5 and 5 ′) made entirely of rails and connected to the two ends (3C and 3D) heel side of the molded part (3), but neither the rail profile of the two ends (3C and 3D) nor the rail profile of the parts (5 and 5 ′) effectively serving as a rolling surface, the moving point (1) being, in turn, made entirely of rails d have all the upper faces effectively serve as a rolling surface. 2. Cross point with movable point, according to claim 1, characterized in that the molded element (3) advantageously has all of its upper faces shaped as a rail profile. 3. Cross point with movable point, according to any one of claims 1 and 2, characterized in that the parts (5 and 5 ′) in rail profile are two in number and are connected by gluing to the rails forming the movable point (1) by means of two spacers (8 and 8 ′) in joint profile. 4. Cross point with movable point, according to any one of claims 1 to 3, characterized in that the parts (5 and 5 ′) are secured, and the non-molded element (4) stiffened by means of plates (6). 5. Cross point with movable point, according to any one of claims 1 to 4, characterized in that that the molded element (3) is made of austenitic manganese steel, the movable tip (1) and the parts (5 and 5 ′) being constituted by rails made of carbon steel. 6. Cross point with movable point, according to any one of claims 1 to 5, characterized in that the rails of the parts (5 and 5 ′) and of the movable point (1) advantageously have a height of 172 mm. 7. Cross point with movable point, according to any one of claims 1 to 6, characterized in that each part (5 and 5 ′) as well as the movable point (1) advantageously consist of a UIC profile rail. A 74. 8. Cross point with movable point according to any one of claims 1 to 6, characterized in that each part (5 or 5 ′) advantageously consists of a UIC 60 profile rail. 9. Cross point with movable point according to any one of claims 1 to 6 or 8, characterized in that the movable point (1) advantageously consists of a needle rail with profile UIC A 74, in order to give it a significant vertical inertia. 10. A method of manufacturing a crossing point with movable point (1) according to any one of claims 1 to 9, for very long railroad tracks incorporated in long welded rails, said crossing heart comprising , in addition, in particular a cradle (2) in two elements (3 and 4), one molded and the other not molded, process characterized in that it consists essentially in welding, tip side, the molded element (3 ) from the cradle (2) to the running rails (7) of the intermediate connection path, and to fix on the molded element (3) of the cradle (2) parts (5 and 5 ′) belonging to the element not molded (4) from the cradle (2), then moving said parts (5 and 5 ′) away from their initial position towards the outside and keeping them in a separated position, inserting between these parts (5 and 5 ′) the point mobile (1), release the parts (5 and 5 ′) so that they return to their initial position, then fix the parts (5 and 5 ′) to the movable point inserted between them, to stiffen the non-molded element (4), and finally to weld, if necessary, on the heel side, the movable point (1) to the running rails (9). 11. The manufacturing method according to claim 10, characterized in that it consists in successively carrying out the following operations:
- welding, tip side, of the two ends (3A and 3B) of the molded element (3), shaped as a rail profile, to the running rails (7) of the intermediate connection path, and welding of two parts (5 and 5 ′) made of rails, each at one (5A, 5′A) of its two ends on one of the two ends (3C and 3D) on the heel side, also in rail profile, of the molded element (3);
- Installation of the molded element (3) with its two parts (5 and 5 ′) and its two running rails (7) welded, on an assembly table;
- spacing of the parts (5 and 5 ′) from their initial position towards the outside, the parts (5 and 5 ′) being flexible from the weld zone with the molded element (3);
- maintenance of the parts (5 and 5 ′) in the separated position;
- installation of the movable tip (1), made of machined and assembled rails, and previously provided with two mounting spacers (8 and 8 ′), by insertion between the two parts (5 and 5 ′) in the separated position ;
- loosening of the two parts (5 and 5 ′);
- fixing of the parts (5 and 5 ′) to the spacers (8 and 8 ′) of the movable tip (1);
- fixing of plates (6) under the non-molded element (4), so as to secure the parts (5 and 5 ′) and thus to stiffen the non-molded element (4);
- descent of the crossing core thus produced from the assembly table;
- Welding, if necessary, of the two ends (1B and 1C) of the movable tip (1) opposite the pointed end (1A) itself and shaped in a running file to the running rails (9). 12. Manufacturing method according to any one claims 10 and 11, characterized in that the welding, on the one hand, of the two ends (3A and 3B) of the molded element (3) to the running rails (7) of the intermediate connection path and, d 'other hand, the two ends (5A, 5′A) of the two parts (5 and 5 ′) at the two ends (3C and 3D) of the molded element (3) is of the electrical type. 13. The manufacturing method according to claim 11, characterized in that the mounting spacers (8 and 8 ′) are previously fixed to the movable tip (1) by gluing. 14. The manufacturing method according to claim 11, characterized in that the parts (5 and 5 ′) are fixed to the spacers (8 and 8 ′) by glued jointing. 15. The manufacturing method according to claim 10, characterized in that the parts (5 and 5 ′) belonging to the non-molded element (4) of the cradle (2) are connected to the molded element (3) of the cradle ( 2) by a non-welded assembly. 16. The manufacturing method according to claim 15, characterized in that the parts (5 and 5 ′) produced in rails are connected by a bolted connection, preferably in the form of a glued joint, each to one (5A, 5′A) of its two ends on one of the two ends (3C and 3D) on the heel side, also in rail profile, of the molded element (3). 17. The manufacturing method according to claim 10 modified in that the operations consisting in fixing on the molded element (3) of the cradle (2) parts (5 and 5 ′) belonging to the non-molded element (4) of the cradle (2), then moving said parts (5 and 5 ′) apart from their initial position towards the outside and keeping them in a separated position, inserting between these parts (5 and 5 ′) the movable point (1), to release the parts (5 and 5 ′) so that they return to their initial position, then to fix the parts (5 and 5 ′) to the movable point inserted between them and to stiffen the non-molded element (4), are replaced by the following operations:
- attachment of the parts (5 and 5 ′) to the movable tip (1) in order to form the unmolded element (4) of the cradle (2);
- stiffening of said non-molded element (4);
- Connection between them, by means of an unwelded assembly, of the two sub-assemblies thus formed, namely that formed by the molded element (3) welded to the running rails (7) and that formed by the element not molded (4), itself formed by the parts (5 and 5 ′) and the movable tip (1). 18. The manufacturing method according to claim 17, characterized in that the welding of the two ends (3A and 3B) of the molded element (3) to the running rails (7) of the intermediate connection path is of the electrical type. . 19. The manufacturing method according to claim 17, characterized in that the fixing of the parts (5 and 5 ′) to the movable tip (1) is effected by means of embedding spacers (8 and 8 ′). 20. The manufacturing method according to claim 17, characterized in that the stiffening of the non-molded element (4) of the cradle (2) is carried out using plates (6). 21. The manufacturing method according to claim 17, characterized in that the non-welded assembly connecting the two sub-assemblies together is a bolted assembly, preferably in the form of a glued joint. 22. Manufacturing process according to any one of claims 17 to 21, characterized in that it consists in carrying out the following operations:
- welding, tip side, of the two ends (3A and 3B) of the molded element (3), shaped as a rail profile, to the running rails (7) of the intermediate connection path;
- placing the movable point (1) on an assembly table;
- fixing on the movable point (1), made of machined and assembled rails, of two mounting spacers (8 and 8 ′);
- fixing of the parts (5 and 5 ′) to the spacers (8 and 8 ′) of the movable tip (1);
- fixing of plates (6) under the non-molded element (4), so as to secure the parts (5 and 5 ′) and thus to stiffen the non-molded element (4);
- descent of the unmoulded element (4) thus produced from the assembly table:
- Installation of the sub-assembly formed by the molded element (3) welded to the running rails (7) on an assembly table;
- vertical then longitudinal transfer, or vice versa, of the sub-assembly formed by the non-molded element (4) fixed to the parts (5 and 5 ′) and to the movable point (1) to the other sub-assembly formed by l 'molded element (3) welded to the running rails (7), so as to put them end to end;
- glued jointing of the two ends (3C and 3D), heel side, in rail profile, of the molded element (3), respectively at the two ends (5A and 5′A) of the two parts (5) made of rails;
- descent of the crossing core thus produced from the assembly table;
- Welding, if necessary, of the two ends (1B and 1C) of the movable tip (1) opposite the pointed end (1A) itself and shaped in a running file to the running rails (9). 23. The manufacturing method according to claim 20, characterized in that the embedding spacers (8 and 8 ′) are previously fixed to the movable tip (1) by gluing. 24. The manufacturing method according to claim 22, characterized in that the parts (5 and 5 ′) are fixed to the spacers (8 and 8 ′) by glued jointing. 25. Manufacturing process according to any one of claims 15, 16 and 22, characterized in that each end (5A or 5′A) of the parts (5 or 5 ′) is connected respectively to each end (3C or 3D ) of the molded element (3) by two ribs (10) joined by six bolts (11), three bolts (11) on the molded element side (3) and three bolts (11) on the part side (5). 26. The manufacturing method according to any one of claims 16 and 22, characterized in that the adhesive consists of a resin and a hardener. 27. The manufacturing method according to claim 26, characterized in that the resin and the hardener are each half involved in the composition of the adhesive. 28. Manufacturing process according to any one of claims 25 to 27, characterized in that a glass cloth (12) is interposed between each splint (10) and, on the one hand, the ends (5A, 5 ′ A) of the parts (5 and 5 ′) and, on the other hand, the ends (3C and 3D) of the molded element (3).

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