阅读说明：本技术 用于固定铁路设备的装置 (Device for fixing railway equipment ) 是由 M-H·埃伦伯格 于 2019-01-15 设计创作，主要内容包括：一种用于固定铁路设备的装置(22),所述装置支撑平台(24)和用于所述铁路设备固定在支撑平台(24)上的机构(30),固定机构(30)包括：-至少一个在纵向方向延伸的导向滑轨(32),其由支撑平台(24)支撑；以及-用于将所述设备连接到平台(24)的构件(34),其能够沿着导向滑轨(32)移动。所述固定机构(30)还包括支撑导向滑轨(32)的上梁(27)和下梁(26),上梁(27)和下梁(26)通过连接构件(31)连接,从而使得可在垂直于导向滑轨(32)的纵向方向的方向上移动。此外,固定机构(30)还包括锁定装置(52),其构造成防止上梁(27)相对于下梁(26)在所述垂直方向移动。(An apparatus (22) for securing railway equipment, said apparatus supporting a platform (24) and a mechanism (30) for securing said railway equipment to the supporting platform (24), the securing mechanism (30) comprising: -at least one guide slide (32) extending in a longitudinal direction, supported by the support platform (24); and-means (34) for connecting the device to the platform (24), which are movable along the guide slide (32). The fixing mechanism (30) further comprises an upper beam (27) and a lower beam (26) supporting the guide rail (32), the upper beam (27) and the lower beam (26) being connected by a connecting member (31) so as to be movable in a direction perpendicular to the longitudinal direction of the guide rail (32). Furthermore, the securing mechanism (30) comprises a locking device (52) configured to prevent the upper beam (27) from moving in said vertical direction with respect to the lower beam (26).)

1. An arrangement (22) for securing railway equipment (12), the arrangement comprising a support platform (24) for the railway equipment (12) and at least one mechanism (30) for securing the railway equipment (12) on the support platform (24), the securing mechanism being movable from a locked position to an unlocked position and vice versa, the securing mechanism (30) comprising:

-at least one guide rail (32) extending in a longitudinal direction;

-at least one member (31) for connecting the railway equipment (12) to the supporting platform (24), said member being movable along a guide slide (32); and

characterized in that said fixing means (30) further comprise:

-an upper beam (27) supporting a guide slide (32); and

-a lower beam (26) connected to the support platform (24);

the upper beam (27) and the lower beam (26) are connected by at least one connecting member, the at least one connecting member (31) being configured such that the upper beam (27) is movable relative to the lower beam (26) in a direction perpendicular to the longitudinal direction of the guide slide (32),

and in that the fixing mechanism (30) comprises means (52) for locking the at least one connecting member (31), the locking means being configured to prevent the upper beam (27) from moving relative to the lower beam (26).

2. Fixing device (22) according to claim 1, wherein the at least one connecting member (31) is an assembly forming an articulated parallelogram (58), which assembly comprises at least one transmission rod (62) and a transmission rod (60a), wherein the at least one transmission rod (62) is connected to the upper beam (27) and the transmission rod (60a) is connected to the lower beam (26) and controlled by a screw and nut assembly (64) or a cylinder, such that the movement of the upper beam (27) is kinematically linked to the movement of a screw (65) in a nut (67) or correspondingly to the movement of a piston rod in a cylinder body.

3. Fixing device (22) according to claim 1, wherein the at least one connecting member (31) is a screw and nut assembly (52), for example trapezoidal, the screw (54) of which is carried by the lower beam (26) and the nut (56) of which is carried by the upper beam (27), so that the movement of the upper beam (27) is kinematically linked to the movement of the nut (56) along the screw (54) and the locking is ensured by the tightening torque of the screw and nut assembly (52).

4. Fixing device (22) according to any of the previous claims, wherein said at least one connection member (31) is a cylinder (52), for example a hydraulic cylinder, the body of which is carried by said lower beam (26) and a rod (56) is carried by the upper beam (27), so that the displacement of the upper beam (27) is kinematically linked to the movement of the cylinder within the cylinder body, so that the locking (52) is ensured by a system for locking the rod (56).

5. A fixture (22) according to claim 2 or 3, wherein the upper beam (27) has a stroke of at least 130mm relative to the lower beam (26).

6. Fixing device (22) according to one of the preceding claims, wherein the fixing mechanism (30) comprises two upper beams (27a, 27b) connected to the lower beam (26), two guide runners (32a, 32b) and two connecting members (31a, 31b), the two connecting members (31a, 31b) connecting the upper beams (27a, 27b) to the lower beam (26), respectively, the connecting members (31a, 31b) being independently controllable.

7. Fixing device (22) according to one of the preceding claims, wherein the attachment device (34) is moved along the guide rail (32) by a drive mechanism (36) which is preferably self-locking.

8. A fixture (22) according to claim 7, wherein the drive mechanism (36) comprises a movable chain (38) movable along the guide slide (32), which chain is driven by at least two sprockets (40) such that the movable chain (38) forms a loop.

9. A fixture (22) according to claim 8, wherein at least one of the chain wheels (40) is provided as a drive wheel (42), the chain wheel (40) being provided with a drive shaft (44), the drive shaft (44) being connected to a motor (46) for driving the drive wheel (42) in rotation about the drive shaft (44).

10. A fixation device (22) according to claim 9, wherein the drive wheel (42) is provided with a braking system (48) for preventing rotation of the drive wheel (42) about its drive shaft (44).

11. The fixture (22) according to claim 10, wherein the braking system (48) is fail-safe and includes, for example, a pair of brake discs (50).

12. Fixing device (22) according to one of the preceding claims, wherein the support platform (24) is movable between a loading position and an inclined transport position, preferably by rotating about at least one horizontal pivot axis.

13. A fixture (22) according to any one of the preceding claims, wherein the fixture is controlled by a remote control or an emergency remote control in case of a failure of the master remote control.

14. The fixture (22) according to one of the preceding claims, wherein the attachment mechanism (30) is configured to pivot about an axis perpendicular to the plane of the support platform (24), the pivoting of the attachment mechanism (30) being provided, for example, by a drive arrangement comprising a pivoting cylinder (77).

15. Vehicle (10) for transporting railway equipment (12), in particular a truck (10) for transporting railway equipment (12), characterized in that it comprises a fixing device (22) according to one of the preceding claims, said fixing device (22) being mounted on a transport chassis supported by a transmission.

Technical Field

The invention relates to a device for fixing railway equipment, in particular to a switch. It also relates to a transport vehicle, in particular a truck, with such a fixing device.

Background

Document FR3024470 describes a wagon for transporting railway equipment, comprising a support platform for the railway equipment, which has a support surface for the railway equipment, which support platform is movable between a horizontal loading position and an inclined transport position. The railway equipment is connected to the supporting platform by means of fixing means formed by respective flanges distributed over the railway equipment and arranged between the railway equipment sleepers and said platform.

However, a disadvantage of this particularly simple connection method is that manual tightening of the flanges into the loading platform is required, for example, before the railway equipment is fixed. Therefore, special precautions are required to ensure personnel safety during the loading and unloading phases.

In order to enable railway equipment to be connected to a platform without the need to access the platform, the company MATISA SA has marketed, since 2006, at least one railway equipment fixing mechanism comprising a connecting rod with a hook at one end for engaging a portion of the rail bottom of the railway equipment. Each bar is slidably mounted in a sleeve hinged to the platform so as to pivot about a longitudinal axis perpendicular to the bar. Thus, the operator can manipulate the rod in a lever-like manner, holding it by its free end opposite the hook, pivoting it until the hook approaches the rail bottom, while adjusting the effective length of the rod by sliding it into the sleeve. Once the hook engages the rail base, all that remains is to prevent the rod from sliding in the sleeve to lock the hook and the railway equipment in position relative to the platform. The length of the bar allows the operator to operate while maintaining a certain distance from the hook to the side of the platform. The system thus described is very similar to that shown in document WO2014154624a 1. This is effective but does not provide a large clamping force between the hook and the railway equipment, particularly because the force applied by the hook to the bottom of the rail during installation and fixing is in the general direction of the bar which is slightly inclined to the horizontal and therefore has a large horizontal component which tends to cause the railway equipment to slide on the platform. Such devices are also difficult to motorize.

In order to overcome this problem, document FR1653185 proposes a railway equipment fixing device comprising a supporting platform whose fixing mechanism comprises a carriage guided by a guide slide, means for blocking the carriage with respect to the rail, and means for locking the guide slide with respect to the platform. The locking member in particular comprises a bevel shim which engages with a corresponding inclined wall of a locking cavity formed in the support platform. Such a device is easy to motorize and allows safe operation of the railway equipment, since the oblique angular shape of the shim allows the movement of the attachment member to be decomposed into at least two components, namely a horizontal movement and a vertical movement. However, the construction of the bevel angle shim and associated locking cavity can be complex.

Disclosure of Invention

The object of the present invention is to overcome the drawbacks of the prior art by proposing a device for fixing railway equipment which allows simple and safe operation of the railway equipment, and which is easy to mechanise and easy to construct. Another object of the invention is to precisely adjust the height of the attachment mechanism to accommodate different tie heights, such as wooden ties (short) or concrete ties (taller).

To this end, the invention relates to a device for fixing railway equipment, comprising a support platform for the railway equipment and at least one mechanism for fixing the railway equipment on the support platform, the fixing mechanism being movable from a locking position to an unlocking position and vice versa, the fixing mechanism comprising:

-at least one guide rail extending in a longitudinal direction;

-at least one member for attaching the railway equipment to the supporting platform, said member being movable along the guide slide;

characterized in that, the fixed establishment still includes:

-an upper beam supporting the guide slide; and

-a lower beam connected to the support platform,

the upper and lower beams are connected by at least one connecting member configured such that the upper beam is movable relative to the lower beam in a direction perpendicular to the longitudinal direction of the guide slide,

and in that the securing mechanism comprises means for locking the at least one connecting member, the locking means being configured to prevent movement of the upper beam relative to the lower beam.

Thanks to the invention, the movement of the attachment member is always decomposed into at least two components, namely the movement of the connecting member in the longitudinal direction of the slide rail and the movement of the upper beam in a direction perpendicular to the longitudinal direction of the slide rail. However, unlike the prior art, mechanisms that allow the motion to be broken down into two components are easier to manufacture and use. In fact, two separate mechanisms allow these movements in two different directions, not just one as in the prior art.

Furthermore, since it is the upper beam that supports the guide rails along which the attachment member moves, the height of the attachment mechanism can be easily adjusted precisely to accommodate different tie heights.

According to a particular embodiment of the invention, the connecting member is an assembly forming an articulated parallelogram, said assembly comprising at least one transmission rod connected to the upper beam and a transmission rod connected to the lower beam and controlled by a screw and nut assembly or a cylinder, so that the movement of the upper beam is kinematically linked to the movement of the screw in the nut or, respectively, the piston rod in the cylinder body. This choice of connecting elements makes it possible to limit the overall dimensions and to obtain a good distribution of forces between the lower and upper beams.

According to another embodiment of the invention, the connecting member is a screw and nut assembly, for example trapezoidal, carried by the upper beam, the screw of which is carried by the lower beam, and the nut of which is carried by the upper beam, so that the movement of the upper beam is kinematically linked to the movement of the nut along the screw, and the locking is ensured by the tightening torque of the screw and nut assembly. Screws or cylinders are in fact inexpensive and particularly simple connecting elements. Movement of the screw in the nut or the cylinder in the cylinder body can also precisely control movement of the upper beam.

In order to be able to absorb the height differences of different types of concrete or wooden railway equipment with the fixing device, the travel of the upper beam is at least 130 mm.

Preferably, the fixing mechanism comprises two upper beams connected to the lower beam, two guide runners and two connecting members connecting the upper beams to the lower beam, respectively, said connecting members being independently controllable. Thus, the two ends can be hooked independently, avoiding overhang, and the clamping force of the hook is constant regardless of the position of the hook in the guide rail. This alleviates the user from additional concerns and allows him to consume less attention. This therefore increases the operational safety.

To facilitate use of the device, the attachment member is moved along the guide rail by a drive mechanism, which is preferably self-locking, providing additional safety to the device.

According to a preferred embodiment of the invention, the drive mechanism comprises a movable chain movable along the guide slide, which chain is driven by at least two chain wheels, such that said movable chain forms a loop. By the drive of the movable chain a natural self-locking mechanism is obtained, which is easy to manufacture and implement.

According to a particular embodiment, at least one of said sprockets acts as a driving wheel, which has the advantage of being easy to use and is provided with a driving shaft, which is connected to an electric motor so as to drive the driving wheel in rotation about the driving shaft.

According to a preferred embodiment of the invention, in order to provide additional safety to the device, the driving wheel is provided with a braking system for preventing the driving wheel from rotating about its driving shaft.

According to a preferred embodiment of the invention, the braking system is fail-safe and comprises, for example, a pair of brake discs. Thus, by default, i.e. in the absence of power, the braking system prevents the drive wheel from rotating about its drive shaft. Therefore, the brake system must be energized to release the brake disc.

According to a preferred embodiment of the invention, which is easy to implement and use for the operator, the support platform is movable between the loading position and the inclined transport position, preferably by rotating about at least one horizontal pivot axis.

According to a preferred embodiment of the invention, in order to eliminate any physical effort on the operator, the securing means are controlled by the remote control or by an emergency remote control in case of a malfunction of the master remote control.

Preferably, the attachment mechanism is configured to pivot about an axis perpendicular to the plane of the support platform, the pivoting of the attachment mechanism being provided by a drive arrangement comprising a pneumatic cylinder, for example. This allows the position of the attachment mechanism to be adjusted to compensate for possible misalignment.

The invention also relates to a truck for transporting railway equipment, in particular for transporting railway equipment, characterized in that it comprises a fixing system according to the invention mounted on a transport chassis supported by a transmission.

Drawings

Further features and advantages of the invention will become apparent from the following description, given with reference to the accompanying drawings, in which:

figure 1 shows a truck for transporting railway equipment, comprising a device for fixing railway equipment according to an embodiment of the invention, said device for fixing railway equipment being in a transport position;

FIG. 2 is a sectional view according to line II-II of FIG. 1;

FIG. 3 is a view similar to FIG. 2 of the fixture of FIG. 1 with its upper beam in a first position;

figure 4 is a plan view of a detail of the fixing device of figure 1, with the chain omitted;

figure 5 is a view similar to figure 3, showing different positions of the connecting member of the fixing device according to the invention;

figure 6 is a view similar to figure 3, showing different positions of the connecting member of the fixing device according to the invention, with the upper beam in a second position;

figures 7 to 9 are detail views of figure 3, showing different positions of the connecting member of the fixing device;

figure 10 is a view similar to figure 3 of a fixing device according to a second embodiment of the invention in a first position;

fig. 11 is a view similar to fig. 10 of a fixing device according to a second embodiment of the invention in a second position; and

fig. 12 is a plan view of a truck for transporting the railway equipment according to fig. 1.

Detailed Description

Fig. 1 shows a transport wagon 10 loaded with large-sized railway equipment 12 (see fig. 3), in particular with a width greater than the clearance margin 14 prescribed for railway transport. The railway equipment 12 is, for example, a switch as shown in fig. 3, including a track 16 and switch ties 18.

As can be seen in particular in fig. 2, the transport wagon 10 has a chassis 20 whose width is less than or equal to the width of the clearance margin 14. The fixing of the railway equipment 12 to the transport wagon is ensured by a fixing device 22, said fixing device 22 comprising a supporting platform 24 of the railway equipment 12, said supporting platform 24 being hinged to the chassis 20 by a joint 25, said joint 25 allowing pivoting about a horizontal axis parallel to the longitudinal axis ZZ of the chassis 20, which horizontal axis is itself perpendicular to the plane of fig. 2.

In fig. 1 and 2, the support platform 24 is inclined with respect to a reference plane parallel to the plane of the track on which the transport wagon 10 travels. One or more hydraulic cylinders (not shown) or any other type of electric actuator is used to pivot the tiltable support platform 24 between a loading position, shown in fig. 3, in which the support platform 24 lies in a loading plane P (shown in phantom in fig. 3 and 5-11, and corresponding to the plane in fig. 4), and an inclined transport position, shown in fig. 1 and 2.

The support platform 24 is preferably two or more parts to make the structure of the fixture 22 less rigid. In this case, the support platform 24 is preferably a mechanically welded structure. It comprises longitudinal beams 24a and transverse beams 24b, the transverse beams 24b being provided with at least one fixing mechanism 30. The complete assembly can be in a raised position (fig. 2) and can be pivoted about joint 25 to a horizontal position for loading and unloading. The fixture 22 further includes a fixture mechanism 30, the fixture mechanism 30 including a lower beam 26 and an upper beam 27 connected to the support platform 24. The securing mechanism 30 is designed to secure the railway equipment 12 to the support platform 24.

In the embodiments shown in the figures, and in particular in fig. 1 to 9, the fixing device 22 comprises four fixing means 30. It should be noted that the fixture 22 may include fewer or more securing mechanisms as desired, depending on the number and size of the railroad equipment to be transported.

The fastening means 30 can be moved independently of one another on the platform 24 along the longitudinal axis ZZ of the chassis 20. This makes it possible to adapt it to various loading or transport requirements, as well as to the size or shape of the railway equipment to be transported.

The upper beam 27 and the lower beam 26 are connected by at least one connecting member 31. The connecting member 31 is configured such that the upper beam 27 is movable with respect to the lower beam 26 in a direction N perpendicular to the longitudinal direction L of a guide slide 32 carried by the upper beam 27, as will be described later. In particular, the upper beam 27 and the lower beam 26 are connected by two connecting members 31 arranged on either side of a plane of symmetry S of the support platform 24, which plane of symmetry S is perpendicular to the load plane P.

As will be described in detail below, each securing mechanism 30 is movable between a locked position, in which the railway equipment 12 is securely secured to the support platform 24, and an unlocked position, in which the railway equipment 12 may be released from the support platform 24.

For this purpose, each fixing mechanism 30 comprises a guide slide 32, which guide slide 32 is supported by the upper beam 27, extends in the longitudinal direction L, and is supported by the support platform 24. In particular, when the support platform 24 is in the loading position, the longitudinal direction L of the guide slide 32 is perpendicular to the longitudinal or rail axis of the chassis 20, while being comprised in the free plane formed by the support platform 24.

Each securing mechanism 30 also includes an attachment member 34 for connecting the railway equipment 12 to the support platform 24, wherein the connecting member is movable along the guide rails 32. In the embodiment shown in the figures, the attachment members 34 are hooks.

As shown in fig. 3, each attachment member 34 or hook has a hooking zone 35, said hooking zone 35 being intended to engage with the bottom 18a of one of the tracks 18 of the switch 16.

A drive mechanism 36 is associated with each attachment member 34 and allows it to move along the associated guide slide 32. The drive mechanism 36 is preferably self-locking to prevent any inadvertent movement of the attachment member 34, particularly when the transport cart 10 is moving.

In the embodiment shown in the figures, and as can be seen in particular in fig. 3 and 4, each drive mechanism 36 here comprises a movable chain 38, said movable chain 38 being movable along the guide slide 32, wherein the attachment member 34 is connected to said movable chain 38. In particular, each chain 38 is guided by the associated guide slide 32 such that the attachment member 34 can move along the guide slide 32. Thus, the guide slide 36 defines a linear and preferably rectilinear path for the attachment member 34. The path is included in the loading plane P. In practice, the slide rail 36 here consists of a rail which is substantially U-shaped in cross section, forming a groove along which the chain 38 can move.

Each chain 38 is driven by at least two sprockets 40, in particular such that the chains 38 form loops. In the embodiment shown in the drawings, there are six sprockets 40. Two sprockets 40 are disposed at a first end 38a of the loop nearest the center of the platform 24, and four sprockets 40 are disposed at an opposite end 38e of the loop nearest the free end 32a of the guide slide 32.

One of these sprockets 40 serves as a drive wheel 42, which is provided with a drive shaft 44 connected to a motor 46 (e.g., a hydraulic motor) so that the drive wheel 42 is driven to rotate about the drive shaft 44. The drive wheel 42 has a larger diameter than the other sprockets 40 to facilitate driving by the motor 46.

The drive wheel 42 is here arranged at the end 38e of the loop and is also arranged lower than the other chain wheels 40, i.e. closer to the track on which the carriage 10 travels in the loading position. It should be noted that the arrangement and number of sprockets 40 can of course vary. For example, it is envisioned that there is only one sprocket 40 at each end of the loop formed by the chain 38. The drive wheel 42 could also be placed at the end 38a of the loop instead of the end 38 e.

The drive wheel 42 is equipped with a braking system 48 to prevent the drive wheel 42 from rotating about its drive shaft 44. Preferably, the braking system 48 is fail-safe and includes, for example, a pair of brake disks 50. As shown in fig. 4, the brake discs are arranged on both sides of the drive wheel 42, wherein the chain 36 is omitted for clarity.

In the absence of power, the braking system 48 is configured to prevent rotation of the drive wheel 42 about its axis. In other words, the brake system 48 must be energized to release the brake disc 50. Since brake systems of this type are known per se to the person skilled in the art, they will not be described in detail here.

Since the fixing mechanism 30 is self-locking, the position of the attachment member 34 is blocked in the longitudinal direction of the guide rail 32. Thus, it is prevented from moving in the first direction. More specifically, on the one hand, the chain 38 cannot move along the guide slide 32 without releasing the braking system 50 and, on the other hand, without driving the drive wheel 45 by means of the motor 46. Thus, a double locking protection is provided for preventing the attachment member 34 from moving in the longitudinal direction of the guide rail 32.

The securing mechanism 30 further includes a locking device 52 of the connecting member 31 configured to prevent the upper beam 27 from moving relative to the lower beam 26.

Preferably, as shown in fig. 3 to 9, the connecting member 31 is a screw and nut assembly 52, for example with a trapezoidal cross section, carried by the upper beam 27, so that the movement of the upper beam 27 is kinematically linked to the movement of the nut 56 along the screw 54 and the locking is ensured by the tightening torque of the screw and nut assembly 52. Thus, in this particular embodiment, the locking device 52 is formed by tightening a screw 54 into a nut 56 carried by the lower beam 26. Of course, the cross-sectional shape of the screw 54 may be different.

By tightening the screw and nut assembly 52, the upper beam 27 is prevented from moving relative to the lower beam 26 in a direction perpendicular to the guide slide 32, which is also perpendicular to the loading plane defined by the free surface of the support platform 24 (this plane is schematically shown by the dashed line P in fig. 3). Since the hooking zone 35 of the attachment member 34 is in contact with the bottom plane of the rail 16a on a plane perpendicular to this direction, the position of the attachment member 34 is locked in a second direction perpendicular to the longitudinal direction of the guide slide.

The displacement and tightening of the screw and nut assembly 52 can be performed by driving means known per se to the person skilled in the art, in particular by means of an electric motor. Therefore, it will not be described in detail here.

Another advantage of selecting the screw and nut assembly 52 as the connecting member 31 is that the nut 56 is selectable along the run of the screw 54, i.e. its height is adjustable. Thus, as shown in fig. 5 for different heights of the sleeper 18, and in fig. 6 for two different positions of the screw 52 in the thread 54, the hooking zone 35 can be located at different heights above the lower beam 26 in the connection position. This allows the mechanism to be used equally well with railway equipment having wooden ties 18 (short) or concrete ties 18 (taller). For example, in view of the typical height of concrete and wooden sleepers 18, in this particular embodiment, the travel of the upper beam 27, i.e., the travel of the nut 56 along the screw 54, is selected to be at least 130 millimeters.

In a variant not shown in the figures, the screws are replaced by cylinders and the threads are replaced by cylinder bodies.

Due to the self-locking function of the fixing mechanism 30 on the one hand and due to the presence of the locking means 52 of the connecting member 31 on the other hand, a movement of the attachment member 34 in the longitudinal direction of the guide rail 32 and, correspondingly, a movement of the attachment member 34 in a direction N perpendicular to this longitudinal direction is prevented. The sturdiness of the support platform 24, which fixes the railway equipment 12 to the fixing means 22, is therefore ensured in a simple and reliable manner, as will now be described according to the sequence illustrated in figures 7 to 9.

As shown in fig. 12, the securing mechanism 30 is configured to pivot about an axis perpendicular to the plane of the support platform 24, wherein pivoting of the securing mechanism 30 is provided, for example, by a drive arrangement including a pivot cylinder 76. The stroke of the cylinder 76 is in the plane of the platform 24, transverse to the longitudinal axis ZZ of the truck 10 (i.e. perpendicular to the longitudinal axis ZZ).

In fig. 7, the railroad equipment 12 with the visible track 18 has been placed on the support platform 24. As schematically shown by the dashed line P in fig. 7, the attachment members 34 are retracted so that they are below the loading plane, thereby avoiding any interference of the attachment members 34 with the railway equipment 12 during operation.

To secure the railway equipment 16 to the platform 24, the operator adjusts the position of the screw 54 in the thread 56 by controlling the associated motor based on the height of the tie 18, thereby bringing the securing mechanism 30 into contact with the bottom of the securing device 30 in contact with the rail 16 a.

The operator then unlocks the brake system 48 and controls the motor 46 to allow the drive wheel 42 to be driven, thereby allowing the chain 36 to move along the guide slide 32. The operator then adjusts the position of the attachment members 34 so that they engage the bottom of the rails 18a of the railway equipment 12. At the end of this operation, the securing mechanism 30 is in the transitional position shown in fig. 8.

Finally, the operator adjusts the position of the screw 54 in the nut 56 by controlling the associated motor until the attachment member 34 exerts a sufficient tightening force on the bottom of the rail 16a, preferably with an indicator light indicating that the clamping force has been reached.

Once the railway equipment 12 is secured to the support platform 24 in this manner, the support platform may be lifted to the position shown in fig. 1 and 2 for transport.

The unload operation is performed in the reverse order of the load operation.

If desired, only one of the two attachment members 34 may be positioned to engage one of the rails 18 of the railway equipment 12 while the other attachment member 34 remains in a free position along the guide slide 32. Preferably, as shown, two fixing means 30 are provided, the fixing members 34 of which rotate transversely to each other, i.e. in such a way that the hooking zones 35 face each other. With this arrangement, the railway equipment is laterally locked when the two attachment members 34 are engaged.

In the second embodiment of the invention shown in fig. 10 and 11, the fixing mechanism 30 differs in that the connecting member 31 is an articulated parallelogram assembly 58 comprising at least one transmission rod 62 and a transmission rod 60, the transmission rod 62 being connected to the upper beam 27, and the transmission rod 60 being connected to the lower beam 29 and being controlled by a screw and nut assembly 64, so that the movement of the upper beam 27 is kinematically related to the displacement of the screw 65 in the nut 67.

More precisely, in the embodiment shown in the figures, the parallelogram assembly 58 comprises a transmission rod 62 of longitudinal form, said transmission rod 62 extending in a direction substantially parallel to the direction of extension of the upper and lower beams 27, 29. The drive link 62 is preferably thinned at its center to make it light. The transmission rod 62 is connected to two transmission rods 60a, 60b, one on each free end 62a, 62b of the transmission rod 62. This connection is made, for example, by two pins 68 which pass through the transmission rod 62 and the transmission rods 60a, 60b and extend in a direction perpendicular to the longitudinal direction of the transmission rod 62, i.e. in a plane perpendicular to fig. 10 and 11.

A first transmission rod 60a having a C-shape or boomerang shape is connected to a first end of a screw and nut assembly 64 by a pin 66 extending perpendicular to the longitudinal direction of the transmission rod 62 (i.e., in a plane perpendicular to fig. 10 and 11). The screw and nut assembly 64 is connected to the upper beam 27 in such a way that movement of the screw 65 in the nut 67 moves the transmission rod 60a in the direction of the upper beam 27. Since the transmission lever 62 is connected to the transmission lever 60a, the transmission lever 62 also moves upward in the drawing.

Furthermore, the transmission rod 62 is again connected at its end 62a to the upper beam 27 via the transmission rod 60a, since the transmission rod 60a is connected at its free end to the upper beam 27, which is opposite the location of the connection to the transmission rod 62. This connection is achieved by means of a pin 70, said pin 70 also extending perpendicularly to the longitudinal direction of the transmission rod 62 passing through the transmission rod 60a, the pin 70 itself being connected to a pin 72 passing through the upper beam 27, the two pins 70 and 72 being connected together by means of a tube 74. It should be noted that the connection of the two pins 70 and 72 is optionally in the form of a tube to reinforce the structure, but it may be in another form.

Symmetrically, the transmission rod 62 is also connected to the upper beam 27 at its other end 62b by a transmission rod 60b (also C-shaped), since the transmission rod 60b is also connected to the upper beam 27 by a pin 70, the pin 70 also extending perpendicularly to the longitudinal direction of the transmission rod 62 and through the transmission rod 60a, the transmission rod 60a in turn being connected to a pin 72 through the upper beam 27, the two pins 70 and 72 being connected by a tube 74.

In a variant of this second embodiment, not shown in the drawings, the screw and nut assembly is replaced by a cylinder and cylinder body assembly.

Furthermore, in the second embodiment shown in fig. 10 and 11, the fixing mechanism 30 comprises two upper beams 27a, 27b connected to the lower beam 26, two guide runners 32 and two connecting members 31, the two connecting members 31 connecting the upper beams 27a, 27b to the lower beam 26, respectively, said connecting members 31 being independently controllable. More precisely, the length of each of the two upper beams 27a, 27b preferably corresponds to half the length of the upper beam 27 shown in the previous embodiment.

Thus, since the clamping force of each hook is constant irrespective of the position of the hook in the guide rail, both ends can be hooked independently, thereby avoiding overhang. This relieves the user of additional vigilance and allows him to consume less attention. This increases the operational safety.

Naturally, the examples shown in the figures and discussed above are for illustrative purposes only and are not exhaustive. Various variations are possible.

In particular, the loading and unloading positions of the platform are not necessarily horizontal, but may be inclined, naturally lower than the transport position.

Furthermore, in practice, the same transport wagon may be equipped with a different number of fixing means than those described, distributed over the length of the platform, so as to locally adapt to the configuration of the railway assembly.

Other means for driving the attachment member may also be provided, such as a carriage guided by a guide rail, the carriage being provided with a raceway on which rollers or balls associated with the carriage roll, or a slideway formed on the carriage for the bottom.

It is explicitly specified that the different embodiments shown may be combined into other embodiments presented.

It is emphasized that all features derived from the description, drawings and appended claims, even if in practice only described in connection with other specified features (either individually or in any combination), may be used in combination with other features or groups of features disclosed herein, unless expressly excluded or a technical condition makes such combination impossible or meaningless.