Lifting table for the repair and / or maintenance and / or inspection of rolling stock

Abstract

A lifting table (1) comprising a frame, wheels, two parallel coplanar platforms (2), two lifting devices (5) each associated with a platform (2) for raising and lowering said platforms (2), and a control unit (6), said control unit (6) being configured to control the synchronous operation of the lifting devices (5), each platform (2) extending longitudinally between two edges, respectively called the front (7) and rear (8) of said platform (2), and the lifting table (1) comprising, for each platform (2), two extensions (9) of the platform (2) that can be pivotally coupled, one to the front edge (7), the other to the rear edge (8) of the platform (2). Each platform (2) is formed of platform elements (10, 11, 12) mounted by sliding interlocking to form a telescopic platform (2) adjustable in length. Figure for the abbreviation: Fig. 7

Description

Title of the invention: Lifting table for the repair and / or maintenance and / or inspection of rolling stock

[0001] The present invention relates to a lifting table for the repair and / or maintenance and / or control of rolling stock.

[0002] It relates in particular to a lifting table for the repair and / or maintenance and / or control of rolling stock comprising a chassis and wheels for moving the chassis on the ground, said table comprising two parallel coplanar platforms each having a top face and a bottom face, two lifting devices each associated with a platform for moving said platforms up and down and a control unit, said control unit being configured to control synchronous operation of the lifting devices, each platform extending longitudinally between two edges respectively called front and rear of said platform and the lifting table comprising, for each platform, two pivotable extensions of the platform, one to the front edge, the other to the rear edge of the platform.

[0003] Inspection tables such as those described above exist and are currently used exclusively for four-wheeled vehicles. Today, legislation mandates technical inspections for both light two- and three-wheeled vehicles and four-wheeled vehicles. Companies specializing in technical inspections face the challenge of equipping themselves to handle a wide variety of vehicle types, particularly two-, three-, and four-wheeled vehicles. These companies are seeking versatile equipment.

[0004] One object of the invention is to provide a lifting table whose design allows the lifting of a large number of types of equipment without compromising the simplicity of the table.

[0005] To this end, the invention relates to a lifting table for the repair and / or maintenance and / or inspection of rolling stock comprising a chassis and wheels for moving the chassis on the ground, said table comprising two parallel coplanar platforms, each having a top face and a bottom face, two lifting devices, each associated with a platform, for raising and lowering said platforms, and a control unit, said control unit being configured to control the synchronous operation of the lifting devices, each platform extending longitudinally between two edges, respectively called the front and rear edges of said platform, and the lifting table comprising, for each platform, two pivotable extensions of the platform, one attached to the front edge and the other to the rear edge of the platform, characterized in that each platform is formed of tray elements mounted with sliding interlocking to form a so-called telescopic tray adjustable in length.

[0006] The table is a multi-purpose table suitable for lifting rolling equipment by means of support under the chassis or wheels of said equipment. This results in the possibility of lifting two- to four-wheeled vehicles. The presence of extendable platforms combined with extensions of said platforms allows adaptation to a large number of rolling vehicles. This design allows the extensions to fulfill, in addition to their extension function, the function of an access ramp to the platform.

[0007] According to one embodiment of the invention, the tray elements of a tray comprise a tray element called central and two tray elements called respectively front and rear, each capable of extending at least partially on either side of the central tray element and each coupled by sliding interlocking to the central tray element.

[0008] According to one embodiment of the invention, the central tabletop element is stationary and the front and rear tabletop elements are mounted independently for movement. Because the front and rear tabletop elements are mounted independently for movement, a large number of tabletop configurations are possible.

[0009] According to one embodiment of the invention, each front or rear tray element, coupled by sliding fit to the central tray element, and mounted movable relative to the central tray element between two extreme positions corresponding, one, to a position away from said central tray element, the other, to a position close to said central tray element in which it is arranged to cover the central tray element, is equipped with at least one locking member in each of said extreme positions.

[0010] According to one embodiment of the invention, the or at least one of the locking members of said front, or respectively rear, platter element, in one of the extreme positions is a pivoting hook open towards the front edge of the platter, the or at least one of the locking members of said front, or respectively rear, platter element, in the other of the extreme positions is a pivoting hook open towards the rear edge of said platter, and said locking members of the front, or respectively rear, platter element are configured to cooperate with a common complementary locking member carried by the central platter element.

[0011] According to one embodiment of the invention, the common complementary locking member carried by the central tray element is a pin extending in projection from a longitudinal edge of said central tray element.

[0012] According to one embodiment of the invention, each extension is mounted to pivotally move between a deployed position, in which it forms an angle of approximately 180° with the top face of the tabletop, and a folded position, in which it forms an angle of between 90° and 175° with the underside face of the tabletop, and said table includes, for each extension, a unlockable locking system for said extension at least in the deployed position.

[0013] According to one embodiment of the invention, the unlockable locking system for at least one of the extensions comprises two parallel support legs mounted at one of their pivoting ends on the platform around a transverse axis of said platform, said support legs being connected at their opposite ends by a connecting bar capable of coming into the locked configuration of said system in support against a stop provided on a face called the underside of the extension.

[0014] According to one embodiment of the invention, said table comprises two access ramps each of which can be pivotally coupled to one of the extensions, each ramp extending, in the state coupled to an extension, along an edge of the extension opposite the edge of the extension adjoining one of the edges of the tabletop.

[0015] According to one embodiment of the invention, each access ramp is equipped with at least one anti-rollover stop extending at least partially in projection from the receiving surface of a rolling vehicle formed by the platform / extensions / ramps assembly in at least one of the angular positions suitable for the ramp to form an obstacle to the movement of the vehicle on said surface.

[0016] According to one embodiment of the invention, the platform lifting device comprises a base, one or more pairs of parallel scissors carried by said base and extending between the base and the central platform element and at least one actuator, each scissor comprises two X-shaped arms coupled pivotally about an axis orthogonal to the plane of the X, one of the arms of one of the X and the arm opposite the other of the X of the or at least one of the pairs of scissors are connected by a spacer and one of the ends of the scissor arms of the pair of scissors coupled to the central platform element is mounted to slide along the central platform element in a direction parallel to the support plane formed by said platform.

[0017] According to one embodiment of the invention, the table includes at least one wheel vise that can be removably coupled to the front or rear tabletop element respectively.

[0018] According to one embodiment of the invention, the parallel plates are separated from each other by a distance of at least 500 mm and the distance between the most distant longitudinal edges, called external edges, of the plates is at most 2500 mm. Brief description of the drawings

[0019] The invention will be better understood upon reading the following description of exemplary embodiments, with reference to the accompanying drawings in which:

[0020] [Fig-1] represents a perspective view of a lifting table conforming to the invention in the position of the smallest length of the tabletop and not locked with the extensions, the table being in the lower position of the tabletop;

[0021] [Fig.2] represents a perspective view of a lifting table conforming to the invention in the shortest length position of the tabletop and locked extensions in the deployed position, the table being in the lowest position of the tabletop;

[0022] [Fig.3] represents a perspective view of a lifting table conforming to the invention in intermediate length position of the tabletop and not locked extensions with two wheel vises, the table being in the lower position of the tabletop and supporting a two-wheeled device;

[0023] [Fig.4] represents a perspective view of a lifting table conforming to the invention in the position of greatest length of the tabletop and not locked extensions, the table being in the lower position of the tabletop;

[0024] [Fig.5] represents a perspective view of a lifting table conforming to the invention in the longest position of the tabletop and locked extensions in the deployed position, the table equipped with ramps being in the lowest position of the tabletop;

[0025] [Fig.6] represents a perspective view of a lifting table conforming to the invention in the longest position of the tabletop and locked extensions in the deployed position, the table equipped with ramps and an added element being in the lower position of the tabletop and supporting a three-wheeled vehicle;

[0026] [Fig.7] represents a perspective view of a lifting table conforming to the invention in the longest position of the tabletop and locked extensions in the deployed position, the table equipped with ramps and an added element being in the upper position of the tabletop;

[0027] [Fig.8] represents a perspective view of a lifting table conforming to the invention in intermediate length position of the tabletop and unlocked from the extensions, the table being in high position of the tabletop and supporting a four-wheeled vehicle by a socket under chassis;

[0028] [Fig.9] represents a perspective view of a lifting table conforming to the invention in the shortest length position of the tabletop and locked extensions in the deployed position, the table being in the highest position of the tabletop;

[0029] [Fig. 10] represents a cross-sectional view of the entire platform / extensions / ramps of a lifting table according to the invention;

[0030] [Fig. 11] shows front views of the tabletop / extensions assembly of a table lifting device according to the invention during the lengthwise extension of the platform with a detailed view of a locking device for a platform element in the extreme position;

[0031] [Fig.12] represents partial perspective views of one end of the table for illustrate the transition from an extension of the folded position to the deployed position in which it is locked;

[0032] [Fig. 13] represents partial perspective views of one end of the table for illustrate the fixing of a ramp and the pivoting movement of said ramp;

[0033] [Fig. 14] represents an exploded view of a plate / extensions / assembly ramps with two detailed views.

[0034] As mentioned above, the invention relates to a lifting table 1 of the type shown in [Fig. 1]. This table 1 allows for the repair and / or maintenance and / or inspection of rolling vehicles 30, which may be three-wheeled vehicles, four-wheeled vehicles, as illustrated in Figures 6 and 8, and two-wheeled vehicles, as illustrated in [Fig. 3]. Such a vehicle 30 comprises a chassis 31 and wheels 32.

[0035] This table 1 comprises two parallel coplanar platforms 2. These platforms 2 are separated from each other by a distance of at least 500 mm to allow an operator to pass between them. The distance between the outermost longitudinal edges of the platforms is at most 2500 mm to provide a compact design. Each platform 2 has a top face 3 facing upwards in its operating configuration and a bottom face 4 facing downwards in its operating configuration. The table 1 includes, for each platform 2, a platform 2 lifting device extending along the bottom face 4 of the platform 2. The platform 2 has a front edge 7 and a rear edge 8 and extends longitudinally from the front edge 7 towards the rear edge 8.Table 1 also includes a control unit 6, this control unit 6 being configured to control synchronous operation of the lifting devices 5 for synchronous movement of the platforms 2 between a low position as illustrated in Figures 1 to 6 and a high position as illustrated in Figures 7 to 9.

[0036] The control unit is in the form of an electronic and / or computer system that includes, for example, a microprocessor and working memory. In one particular aspect, the control unit may be in the form of a programmable logic controller (PLC). In other words, the functions and steps described may be implemented as a computer program or via hardware components (e.g., programmable gate arrays). In particular, the functions and steps performed by the control unit or its modules may be carried out by instruction sets or computer modules implemented in a processor. or controller, or be implemented using dedicated electronic components or components such as field-programmable gate arrays (FPGAs) or application-specific integrated circuits (ASICs). It is also possible to combine computer and electronic components. When it is specified that the unit, or means or modules of said unit, are configured to perform a given operation, this means that the unit includes computer instructions and the corresponding execution means to perform said operation and / or that the unit includes corresponding electronic components.

[0037] As illustrated by the passage from [Fig.1] to [Fig.4] and the views of figures 10, 11 and 14, each plate 2 is formed of elements 10, 11, 12 of the plate mounted by sliding interlocking to form a plate 2 said to be telescopic adjustable in length.

[0038] The platform elements 10, 11, 12 of a platform 2 comprise a central platform element 10 and platform elements respectively called front 11 and rear 12 capable of extending each at least partially, on either side of the central platform element 10 and each coupled by sliding interlocking to the central platform element 10.

[0039] Ideally, the central tray element 10 is stationary and the front tray elements 11 and rear tray elements 12 are mounted independently when moving.

[0040] Thus, the platform 2 is capable of presenting several configurations, namely a configuration in which the front platform elements 11 and rear platform elements 12 are brought together until they touch, and the central platform element 10 is covered by these front platform elements 11 and rear platform elements 12, as illustrated in [Fig.1] or in the top view of [Fig.1 1], a configuration in which one of the platform elements is in a position close to the central platform element 10 and the other platform element is away from the central platform element 10, as illustrated for example in Figures 3 and 8, and a configuration in which the front platform elements 11 and rear platform elements 12 are in a position away from the central platform element 10, as illustrated in Figures 4 and 5, for example.

[0041] The length of each tray 2 can thus vary within a wide range, for example, between 1200 millimeters and 3000 mm. In the examples shown, each front or rear tray element can overlap by a maximum of half the length of the central tray element. Obviously, the dimensions of these overlap areas can vary.

[0042] For operational safety, each front platter element 11, or respectively rear platter element 12, coupled by sliding fit to the central platter element 10 and mounted to move relative to the central platter element 10 between two extreme positions, one corresponding to a position away from said central platter element 10, the other to a position closer to said central platter element 10 in which it is arranged with at least partial overlap of the central platter element 10, is equipped with at least one locking member in each of the extreme positions. These locking members, of which there are two per front or rear platter element, are shown for each front or rear platter element in Figures 131 and 132.

[0043] The locking member or members 131 of said front tray element 11, or respectively rear tray element 12, in one of the extreme positions, is a pivoting hook open towards the front edge 7 of the tray 2. The locking member or members 132 of said front tray element, or respectively rear tray element 12, in the other of the extreme positions, is a pivoting hook open towards the rear edge of the tray 2.

[0044] The locking members 131 and 132 of the front tray element 11, or respectively rear 12, are configured to cooperate with a common complementary locking member 14 carried by the central tray element 10. The common complementary locking member 14 carried by the central tray element 10 is a pin extending in projection from a longitudinal edge of said central tray element 10.

[0045] The swiveling hooks equipping the front tray element 11 and the rear tray element 12 are more particularly visible in figures 11 and 14.

[0046] The central platform element 10 comprises, along each of its longitudinal edges, a pin extending outward from the platform 2. This pin is adapted to slide within a slot fitted to the longitudinal edge of the front or rear platform element. Each front or rear platform element comprises, at each end of the slot, a pivoting hook mounted to pivot about an axis perpendicular to the longitudinal axis of the platform 2.

[0047] The hooks fitted to the longitudinal edge of a tray element are open in opposite directions. Thus, one of the hooks, corresponding to the locking member 131 in the figures, and open towards the front edge 7 of the tray 2, is active for the front tray element 11 when it is associated with the front tray element 11, in a position close to the front tray element 11 of the central tray element 10, to prevent the front tray element 11 from separating from the central tray element 10. Similarly, it is active for the rear tray element 12 when it is associated with the rear tray element 12, in a position away from the element of the rear tray of the central tray element 10, to prevent the rear tray element 12 from coming closer to the central tray element 10.

[0048] Similarly, one of the hooks, shown in 132 in the figures, and open towards the rear edge 8 of the tray 2 is active for the front tray element 11, in a position away from the front tray element 11 of the central tray element 10, to prevent the front tray element 11 from approaching the central tray element 10, and for the rear tray element 12, in a position away from the rear tray element 12 of the central tray element 10, to prevent the rear tray element 12 from moving away from the central tray element 10.

[0049] Obviously, the term "front tray element" means the tray element that adjoins the front edge of the tray, and the term "rear tray element" means the tray element that adjoins the rear edge of the tray 2.

[0050] The locking mechanisms of the same tray element are selectively activatable. In the active state, one locking mechanism engages with the complementary locking mechanism carried by the central tray element.

[0051] As mentioned above, the table 1 includes, for each platform 2, a lifting device 5 configured to allow the platform 2 to move from a low position close to the ground to a high position away from the ground. The lifting device 5 for a platform 2 comprises, as illustrated for example in [Fig. 8], a base 21, one or more pairs of parallel scissor arms 22 carried by said base 21 and extending between the base 21 and the central platform element 10, and at least one actuator 23.

[0052] The actuators 23 are here formed by hydraulic cylinders. The actuators 23 of one of the lifting devices 5 are in fluidic communication with the actuators of the other lifting devices 5 to allow synchronous operation.

[0053] In the example shown, a lifting device 5 comprises two parallel pairs of scissors 22. One end of each scissor arm of the first pair of scissors, referred to as the lower pair, is coupled to one end of an arm of a scissor arm of the second pair of scissors, referred to as the upper pair. The end of each scissor arm of the first pair of scissors opposite the end coupled to an arm of a scissor arm of the second pair of scissors is pivotally coupled, and, for the end of one of the arms, also slidably coupled, to the base 21. The end of each scissor arm of the second pair of scissors opposite the end coupled to an arm of a scissor arm of the first pair of scissors is pivotally coupled, and, for the end of one of the arms, pivotally and slidably coupled to the platform 2, in particular to the central platform element 10 of the platform 2.

[0054] The arms of the opposing scissors are, for reasons of synchronous movement and reinforcement, connected by crossbars. In addition, one of the arms 221 One of the X-shaped arms of the second, so-called upper, scissor arm(s) and the arm 221 opposite the other X-shaped arm of the second scissor arm(s) are connected by a spacer 24. The lifting device 5 also includes at least one connecting rod, in this case, generally, a pair of parallel connecting rods. The actuator(s) 23 extend between the base 21 and the connecting rod(s). The connecting rod(s) is connected at one of its ends to the actuator 23 or to one of the actuators 23 by a pivot joint with an axis parallel to the pivot axis of the X-shaped arms. The connecting rod(s) is also provided at its opposite end with a swiveling bearing or sliding element.Each connecting rod is pivotally coupled to at least one of the braced arms 221 of the X formed by one of the scissors of the second pair of scissors, i.e. the upper pair of scissors, by a pivot with an axis parallel to the pivot axis of the arms 221 of each X of the second pair of scissors to allow a displacement of the connecting rod in the driven state in pivotal movement by the actuator 23 between a position bearing against the brace 24 and a position away from the brace 24.

[0055] The connecting pivot of the or each connecting rod to a scissor 22 of one of the pairs of scissors extends between the bearing or friction member of the connecting rod and the end of the connecting rod coupled to the actuator 23.

[0056] Thus, the portion of the connecting rod(s) extending between the pivot and the bearing or friction element forms a lever. During the transition from the lower to the upper position of the plate 2, the connecting rod, which is supported on the base by its bearing or friction element, pivots around the pivot until it comes to rest against the spacer 24. At this stage, the forces of the actuator 23 are transmitted to the scissors 22 of the second pair of scissors.

[0057] The lifting table 1 further comprises extensions 9 of the platform 2, pivotally coupled, one to the front edge 7, the other to the rear edge 8 of the platform 2. Due to the nature of the platform 2, one of the extensions is pivotally coupled to the front platform element 11, while the other extension 9 is coupled to the rear platform element 12. Each extension 9 comprises a plate with folded edges. This extension 9 extends in line with the platform 2 and abuts the platform 2 along one of its edges, while the opposite edge of the extension 9 is free or coupled to a ramp 19, which will be described below. The longitudinal folded edges of each extension 9 have a triangular shape to form an edge whose height decreases from the area where the extension 9 connects to the platform 2 towards the free edge of said extension 9.Each extension 9 is mounted to pivot between an extended position in which it forms an angle of approximately 180° with the top face 3 of the plate 2, i.e. equal to 180° to within ± 4 degrees, and a folded position in which it forms an angle between 90 and 175° with the underside face of the plate 2.

[0058] The table 1 includes, for each extension 9, a lockable system 15 for locking said extension 9 at least in the deployed position. Details of the lockable locking system 15 for an extension 9 are shown in [Fig. 12]. This lockable locking system 15 comprises two parallel support legs 16 arranged on the underside of the table 2 and mounted at one of their pivoting ends on the table 2 about an axis transverse to the table 2. This axis extends parallel to the connecting axis of the X-shaped arms 22 of a scissor mechanism. This pivot joint extends between a platform element other than the central platform element 10 and the leg 16. The support legs 16 are connected at their end opposite to that coupled to the platform by a connecting bar 17 capable of coming into a locked configuration of said system 15 bearing against a stop 18 provided on a face called the underside of the extension 9.The leg 16 / linking bar 17 assembly is manually actuated to move the locking system 15 from a locked configuration in which the extension is in the deployed position and the linking bar 17 of the legs 16 is in contact with the stop 18, as illustrated in the lower view of [Fig. 12], to an unlocked configuration in which the extension 9 is free to pivot around an axis parallel to the pivot axis of the scissor arms of the lifting device 5 in the direction of lowering the extension to the folded position, as illustrated in the upper view of [Fig. 12].

[0059] The stop 18 can be formed by an elongated piece against which the connecting bar 17 of the support legs 16 is able to bear in the locked configuration of the locking system 15.

[0060] Thanks to the presence of these extensions 9, which increase the length of the platform and the overall dimensions of the table, a large number of configurations are possible: both front and rear extensions 9 in the deployed position, a single front or rear extension 9 in the deployed position, or no extension 9 in the deployed position. This design allows for the versatility of the lifting table 1, which is suitable for lifting a wheeled vehicle by means of a grip under the chassis 31 of the vehicle 30, as illustrated in [Fig. 8], where the wheels of the vehicle extend beyond the platforms 2, or a grip under the wheels of the vehicle, as illustrated in Figures 3 and 6, where the wheels of the vehicle are positioned above and vertically above at least one of the two platforms. This multiple positioning of the extensions, combined with a variation in the length of the platform, allows the table to accommodate vehicles with 2, 3, or 4 wheels.

[0061] In the case of under-chassis mounting, the method of lifting a rolling vehicle 30 using such a lifting table 1 may include a step of rolling the vehicle 30 to a vertical position on the platform 2 with the wheels of the vehicle 30 extending out of the platforms 2, and an actuation step of the lifting devices 5 for lifting the machine 30 by a grip under the chassis 31 of the machine 30 as illustrated in [Fig.8].

[0062] The lifting table 1 also allows for lifting the vehicle under its wheels, as illustrated in Figures 3 and 6. To facilitate this lifting, particularly for two- or three-wheeled vehicles, and possibly four-wheeled vehicles, the table 1 may include access ramps 19, visible in Figures 6 and 7, each of which can generally be removably coupled to one of the extensions 9. Thus, one of the ramps 19 is pivotally coupled to one of the extensions 9, and the other ramp 19 is pivotally coupled to the other extension 9, as illustrated in [Fig. 5]. Each ramp 19, when coupled to an extension 9, extends along an edge of the extension 9 opposite the edge of the extension 9 adjacent to one of the edges of the platform 2.

[0063] Each ramp 19 is presented here in the form of a plate with hooks on its underside that fit into slots in an extension 9 to allow, when the hooks are inserted in the slots, the ramp 19 to be positioned in line with an extension 9 as illustrated in the central view of [Fig. 13]. Each ramp 19 is pivotally coupled to an extension 9 in a free pivoting manner between an active position in which the platform is in the lower position and the ramp 19 forms an angle of approximately 165° with the upper face of the extension 9, and an inactive position in which the platform 2 is in the upper position and the ramp 19 forms an angle of approximately 90° with the underside of the extension. In this inactive position of the ramp 19, ramp stops come to rest on the underside face of the extension 9 to form end stops for the ramp 19 in the inactive position.In the active position, hooks and stops cooperate with each other and with the slots of the extensions 9 to ensure that the ramp 19 remains in the active position.

[0064] Each access ramp 19 is equipped with at least one rollover stop 20 extending at least partially beyond the receiving surface of a rolling vehicle formed by the platform / extensions / ramp assembly in at least one of the angular positions that the ramp can assume to form an obstacle to the movement of the vehicle on said surface. This rollover stop 20 is formed by a plate extending in line with the running surface defined by the ramp, on the edge side of the ramp that can be coupled to the extension. When the ramp is in the active position, the rollover stop 20 is inactive, as illustrated in [Fig. 6]. When the ramp 19 is in the inactive position, as illustrated in [Fig. 7], the rollover stop 20 is active.

[0065] The table 1 further includes at least one wheel vise 25 that can be removably coupled to at least one of the front 11 or rear 12 tabletop elements as illustrated in [Fig. 3]. The wheel vise or vises 25 can be coupled to a tabletop element other than the central tabletop element 10. It is also possible, as illustrated [Fig. 6] involves adding a plate-like element 26 between the two platforms 2 to fill the space between them. This added element 26 can be fitted with pins that fit into notches in the platforms 2. This configuration is particularly well-suited for three-wheeled vehicles.

[0066] In the case of a wheeled support, the method of lifting a vehicle 30 using a lifting table 1, as described above, possibly with at least one of the extensions 9 in the deployed position, comprises the following steps: - a positioning step for each of the wheels of the vehicle 30 resting on the support surface formed by at least one of the platforms and / or at least one of the extensions 9 if it is in the deployed position, and - an actuation step of the lifting device 5 for lifting the machine 30 by means of a grip under the wheels 32 of the machine 30.

[0067] Thanks to the many configurations offered by the table, depending on the length of the platform 2, the position (deployed or folded) of the extensions 9 and the presence or absence of ramps 19, all light vehicles with 2, 3 or 4 wheels weighing less than 3.5 tonnes can be accommodated by this table.

Claims

Demands

1. A lifting table (1) for the repair and / or maintenance and / or inspection of a rolling vehicle (30), comprising a chassis (31) and wheels (32) for ground movement of the chassis (31), said table (1) comprising two parallel coplanar platforms (2), each having a top face (3) and a bottom face (4), two lifting devices (5), each associated with a platform (2), for raising and lowering said platforms (2), and a control unit (6), said control unit (6) being configured to control the synchronous operation of the lifting devices (5), each platform (2) extending longitudinally between two edges, respectively referred to as the front (7) and rear (8) edges of said platform (2), and the lifting table (1) comprising, for each platform (2), two pivotable extensions (9) of the platform (2), one to the front edge (7) and the other to the rear edge (8) of the platform (2),characterized in that each tray (2) is formed of tray elements (10, 11, 12) mounted by sliding interlocking to form a tray (2) said to be telescopic and adjustable in length.

2. Lifting table (1) according to claim 1, characterized in that the platform elements (10, 11, 12) of a platform (2) comprise a central platform element (10) and two platform elements respectively front (11) and rear (12) capable of extending at least partially on either side of the central platform element (10) and each coupled by sliding interlocking to the central platform element (10).

3. Lifting table (1) according to the preceding claim, characterized in that the central platform element (10) is stationary and in that the front (11) and rear (12) platform elements are mounted independently in motion.

4. Lifting table (1) according to claim 2 or 3, characterized in that each front (11) or rear (12) platform element, coupled by sliding fit to the central platform element, and mounted movable relative to the central platform element (10) between two extreme positions, one corresponding to a position away from said central platform element (10), the other to a position closer to said central platform element (10) in which it is arranged overlapping the element of central plate (10), is equipped with at least one locking device (131, 132) in each of the said extreme positions.

5. Lifting table (1) according to the preceding claim, characterized in that the or at least one of the locking members (131, 132) of said front (11) or rear (12) platform element, in one of the extreme positions is a pivoting hook open towards the front edge (7) of the platform (2), in that the or at least one of the locking members (131, 132) of said front (11) or rear (12) platform element, in the other of the extreme positions is a pivoting hook open towards the rear edge of said platform (2), and in that said locking members (131, 132) of the front (11) or rear (12) platform element are configured to cooperate with a common complementary locking member (14) carried by the central platform element (10).

6. Lifting table (1) according to the preceding claim, characterized in that the common complementary locking member (14) carried by the central platform element (10) is a pin extending in projection from a longitudinal edge of said central platform element (10).

7. Lifting table (1) according to any one of the preceding claims, characterized in that each extension (9) is mounted movable to pivot between a deployed position, in which it forms, with the top face (3) of the platform (2), an angle close to 180°, and a folded position, in which it forms, with the bottom face (4) of the platform (2), an angle between 90° and 175°, and in that said table (1) comprises, for each extension (9), a unlockable system (15) for locking said extension (9) at least in the deployed position.

8. Lifting table (1) according to the preceding claim, characterized in that the unlockable locking system (15) of at least one of the extensions (9) comprises two parallel support legs (16) mounted at one of their pivoting ends on the platform (2) about an axis transverse to said platform (2), said support legs (16) being connected at their opposite ends by a connecting bar (17) capable of coming into the locked configuration of said system (15) bearing against a stop (20) provided on a face called the underside of the extension (9).

9. Lifting table (1) according to any one of claims 1 to 8, characterized in that said table (1) comprises two access ramps (19) each pivotally coupleable to one of the extensions (9), each ramp (19) extending, in the coupled state to an extension (9), along an edge of the extension (9) opposite the edge of the extension (9) adjoining one of the edges of the platform (2).

10. Lifting table (1) according to the preceding claim, characterized in that each access ramp (19) is equipped with at least one anti-tipping stop (20) extending at least partially in projection from the receiving surface of a rolling device formed by the assembly platform (2) / extensions (9) / ramps (19) in at least one of the angular positions suitable for the ramp (19) to form an obstacle to the movement of the device on said surface.

11. Lifting table (1) according to any one of claims 1 to 10, characterized in that the lifting device (5) for a platform (2) comprises a base (21), one or more pairs of parallel scissors (22) carried by said base (21) and extending between the base (21) and the central platform element (10) and at least one actuator (23), in that each scissor (22) comprises two X-shaped arms (221) pivotally coupled about an axis orthogonal to the plane of the X, in that one of the arms (221) of one of the X's and the arm (221) opposite the other of the X's of the or at least one of the pairs of scissors are connected by a spacer (24) and in that one of the ends of the arms (221) of the scissors (22) of the pair of scissors (22) coupled to the central tray element (10) is mounted to slide movablely along the central tray element (10) in a direction parallel to the support plane formed by said tray (2).

12. Lifting table (1) according to claim 2 or any one of claims 3 to 11 taken in combination with claim 2, characterized in that the table (1) comprises at least one wheel vise removably coupling to the front (11) or rear (12) table element respectively.

13. Lifting table (1) according to any one of claims 1 to 12, characterized in that the parallel platforms (2) are separated from each other by a distance of at least 500 mm and in that the distance between the most distant longitudinal edges, referred to as the external edges of the platforms (2), is at most 2500 mm.