Telescopic device with lifting platform

Abstract

The invention relates to a telescopic lifting platform device (1), said device (1) comprising a fixed frame (10) having a base (11), four vertical uprights (12) and two lateral crossbeams (14-1, 14-2), two lateral frames (21, 22), a movable frame (30) comprising a platform (31) mounted between the four vertical uprights (12) and the lateral frames (21, 22), a drive system comprising a winch (41) fixed to the fixed frame (10), drive pulleys (42) mounted on the lateral crossbeams (14-1, 14-2), two drive cables (43, 44) connected on one side to the winch (41) and on the other side to the two lateral frames (21, 22) via the drive pulleys (42), and a transmission system comprising a first transmission pulley (52) fixed on the first lateral frame (22),a first transmission cable (54-1) fixed on one side to the first lateral cross member (14-1) and on the other side to the platform (31) via said first transmission pulley (52), at least a second transmission pulley (52) fixed to the second lateral frame (22), at least a second transmission cable (54-2) fixed on one side to the second lateral cross member (14-2) and on the other side to the platform (31) via said second transmission pulley (52). Figure for the abbreviation: Figure 3,

Description

Title of the invention: Telescopic device with lifting platform technical field

[0001] The present invention relates to the field of handling and more particularly concerns a telescopic device with a lifting platform. Previous technique

[0002] In various fields of handling and work, it is common to need to lift or raise loads or people, for example to lift goods in order to store them at height or workers when they have to carry out work on an elevated part.

[0003] It is known to use specific equipment for each of these tasks, including forklifts, scaffolding, or ladders. However, these solutions do not allow for the lifting of both loads and personnel indiscriminately and present drawbacks in terms of safety, maneuverability, and setup time.

[0004] One solution to these drawbacks is to use a lifting device as shown in document CN214299146U. This device comprises a fixed frame and a movable frame. The movable frame includes a lifting platform at its end and is mounted around and above the fixed frame. The movable frame can move vertically relative to the fixed frame by means of a winch attached to the fixed frame and a set of cables and pulleys connecting the fixed frame to the movable frame. Thus, the movable frame can be raised to a controlled height by the action of the winch, which winds or unwinds the cables passing over the pulleys.

[0005] However, the position of the movable frame around the fixed frame implies a low position of the platform above the fixed frame. This configuration is disadvantageous because it requires that loads or personnel be raised above the device beforehand in order to be placed on the platform for lifting.

[0006] There is therefore a need for a simple and effective solution to remedy at least some of these drawbacks. Description of the invention

[0007] To this end, the invention first relates to a telescopic device with a lifting platform, said device comprising:

[0008] - a fixed frame configured to rest on the ground and comprising a base horizontal rectangular base from which extend vertically upwards, from the four corners of said base, four vertical uprights defining a front face, a rear face and two side faces, the fixed frame further comprising a a first horizontal lateral crossbar and a second horizontal lateral crossbar, parallel to each other and each connecting two vertical uprights at the level of each lateral face,

[0009] - a first lateral frame and a second lateral frame extending vertically parallel to each other, perpendicular to the base of the fixed frame between the two lateral crossbeams,

[0010] - a mobile frame comprising a platform mounted between the four uprights vertical and lateral frames,

[0011] - a drive system comprising a winch fixed to the fixed frame, at least a first drive pulley mounted on the first side cross member, at least one first drive cable connected on one side to the winch and on the other side to the first side frame via said first drive pulley, at least one second drive pulley mounted on the second side cross member and at least one second drive cable connected on one side to the winch and on the other side to the second side frame via said second drive pulley,

[0012] - a transmission system comprising a first transmission pulley fixed on the first side frame, a first transmission cable fixed on one side to the first side cross member and on the other side to the platform via said first transmission pulley, at least a second transmission pulley fixed on the second side frame, at least a second transmission cable fixed on one side to the second side cross member and on the other side to the platform via said second transmission pulley.

[0013] The telescopic lifting platform device thus makes it possible to raise and lower loads and / or people located on the platform of the mobile frame in a simple and efficient manner, without requiring physical effort and without presenting any risk of falling. Furthermore, the telescopic nature of the device, ensured by the lateral frames, allows it to reach significant heights while remaining stable and exhibiting uniform movement.

[0014] Preferably, the drive system comprises a single winch fixed to the fixed frame. The device is simpler and more compact, which facilitates its use, movement and maintenance.

[0015] In this preferred embodiment, the winch is controlled remotely by means of a remote control or a communication device worn by the user.

[0016] Alternatively, the drive system comprises two winches, a first winch and a second winch, fixed to the fixed frame, the first drive cable being connected to the first winch and the second drive cable being connected to the second winch.

[0017] Preferably in this embodiment, the two winches operate in a synchronized manner so that the winding and unwinding of the cables is uniform on both sides of the device according to the invention.

[0018] In an advantageous embodiment, the drive system comprises at least a third drive pulley, a fourth drive pulley, a fifth drive pulley and a sixth drive pulley, said third drive pulley being mounted on the fixed frame vertically above the first drive pulley, said fourth drive pulley being mounted on the fixed frame vertically above the first drive pulley, said fifth drive pulley being mounted on the first side rail, said sixth drive pulley being mounted on the second side rail, the first drive cable passing through the third drive pulley and the fifth drive pulley and the second drive cable passing through the fourth drive pulley and the sixth drive pulley.Using multiple pulleys multiplies the torque supplied by the winch, thus enabling the lifting of a larger payload in addition to the moving frame and side frames without requiring high winch performance.

[0019] Advantageously, the transmission system comprises at least one third transmission pulley fixed to the first lateral frame, a third transmission cable fixed on one side to the first lateral cross member and on the other side to the platform via said third transmission pulley, at least one fourth transmission pulley fixed to the second lateral frame, and at least one fourth transmission cable fixed on one side to the second lateral cross member and on the other side to the platform via said fourth transmission pulley. The presence of the additional transmission cables ensures uniform vertical translation of the moving frame during operation of the device.

[0020] In this advantageous embodiment, the first and third transmission cables are attached to the two ends of the first side cross member, and the second and fourth transmission cables are attached to the two ends of the second side cross member. The spacing on each side cross member provides increased stability to the moving armature during its vertical translation.

[0021] Preferably, the telescopic device comprises a third lateral frame and a fourth lateral frame extending vertically parallel to each other, perpendicular to the base of the fixed frame between the two lateral cross members, and on either side of the movable frame. The addition of these two lateral frames allows the device 1 to reach a greater height.

[0022] In this advantageous embodiment, the first and third lateral frames extend in the same plane and slide past each other by means of a sliding mechanism, and the second and fourth lateral frames extend in the same plane and slide past each other by means of a sliding mechanism. This embodiment allows for greater compactness of the device, thus leaving more space inside for the movable frame to extend, as well as increased robustness and support during the vertical translation of the movable frame.

[0023] Advantageously, the fixed frame includes a plurality of casters, which allow the device to be moved when not in use.

[0024] Preferably, the fixed frame of the telescopic lifting platform device according to the invention comprises at least one stabilizing foot attached to a vertical post. The stabilizing feet ensure the stability of the device during use to prevent it from tipping over. Brief description of the drawings

[0025] Other features and advantages of the invention will become apparent from the following description. This description is purely illustrative and should be read in conjunction with the accompanying drawings, in which:

[0026] [Fig.1] Fig.1 schematically illustrates a front view of the second embodiment of the device according to the invention in a folded configuration.

[0027] [Fig.2] Fig.2 schematically illustrates a perspective view of the second embodiment of the device according to the invention in a folded configuration.

[0028] [Fig.3] Fig.3 schematically illustrates a front view of the second embodiment of the device according to the invention in a configuration during deployment.

[0029] [Fig.4] Fig.4 schematically illustrates a front view of the second embodiment of the device according to the invention in a maximum deployment configuration. Description of the implementation methods

[0030] Fig. 1 schematically illustrates an example of a telescopic lifting platform device 1 according to the invention.

[0031] Telescopic lifting platform device 1

[0032] The device 1 comprises a fixed frame 10, a plurality of lateral frames, a movable frame 30, a drive system and a transmission system.

[0033] Fixed frame 10

[0034] As shown in Figures 1 to 4, the fixed frame 10 comprises a base 11, four vertical uprights 12 and two lateral crossbeams 14-1, 14-2, two longitudinal crossbeams 15, a plurality of casters 16 and a set of stabilizing feet 18. The four vertical uprights define a front face FA, a rear face ARR and two side faces FL1, FL2 of device 1, defined with reference to [Fig.1] which shows device 1 in front face.

[0035] Preferably, the base 11 is a metal frame and the four vertical uprights 12 are also metal and welded to the four corners of the base 11. Alternatively, the vertical uprights 12 can also be fixed by fastening means such as screws and clips.

[0036] The side cross members 14-1 and 14-2 are preferably metal cross members, each fixed to two vertical uprights 12 on one of the short sides of the base 11, preferably welded. As shown in [Fig. 1], the side cross member 14-1 forms part of the side face FL1 and the side cross member 14-2 forms part of the side face FL2.

[0037] As shown in the figures, each of the side cross members 14-1 and 14-2 is preferably mounted offset from the plane formed by the two vertical uprights 12 on which it is fixed, leaving a gap between the top of the vertical uprights 12 and the cross member 14-1, 14-2.

[0038] The longitudinal cross members 15 extend perpendicularly to the lateral cross members 14-1, 14-2 and each connects two vertical uprights 12. A longitudinal cross member 15 is therefore part of the front face FA, and a longitudinal cross member 15 is therefore part of the rear face ARR. The longitudinal cross members 15 are fixed to the vertical uprights 12, preferably welded, and are parallel to the base 11, as shown in Figures 1 to 4.

[0039] The longitudinal cross members 15 allow the vertical uprights 12 to be joined together with the lateral cross members 14-1, 14-2, so as to ensure the structural rigidity of the fixed frame 10 and to prevent the vertical uprights 12 from bending inwards or outwards under the weight of the load lifted.

[0040] The plurality of casters 16 is fixed under the base 11 and allows horizontal movement of the device 1.

[0041] In another embodiment, the movement of the device 1 could be ensured by means of movement such as skates, ball bearings etc.

[0042] As shown in the figures, the stabilizing feet 18 are each mounted on a vertical support 12 so as to be able to pivot about a vertical axis. The stabilizing feet 18 allow the device 1 to be locked and stabilized when it is in use.

[0043] Plurality of side frames

[0044] In a first embodiment not shown in the figures, the plurality of side frames comprises a first side frame 21 and a second side frame 22.

[0045] The frames of the plurality of side frames 21, 22 are substantially rectangular frames, which extend vertically from the base 11 and are preferably metallic, whose edges are welded together.

[0046] In a second embodiment shown in Figures 3 and 4, the plurality of side frames comprises a first side frame 21, a second side frame 22, a third side frame 23 and a fourth side frame 24.

[0047] In this embodiment, the upper edge of the first lateral frame 21 and the second lateral frame 22 is mounted offset from the plane formed by the two vertical edges.

[0048] Preferably also, the side frames 21, 22, 23, 24 include sliding means, such as rollers or rail guides, in order to slide in the vertical direction relative to each other and / or relative to the vertical uprights 12. The sliding means are not shown in the figures for clarity.

[0049] Preferably, as shown in the figures, the side frames 23 and 24 are connected to each other by two retaining cross members 25. The retaining cross members 25 extend perpendicularly to the side frames 23 and 24 and are fixed or welded to the side frames 23, 24.

[0050] The support crossbars 25 ensure the structural rigidity and safety of the device 1 when it is fully deployed.

[0051] In one embodiment where there are additional pairs of frames, the retaining cross members 25 extend between the innermost side frames relative to the base 11.

[0052] Movable armature 30

[0053] As shown in Figures 1 to 4, the movable frame 30 comprises a platform 31 and at least one railing 32. The movable frame 30 is mounted between the four vertical uprights 12 and the lateral frames 21, 22.

[0054] The railing 32 extends vertically from the platform 31 and is preferably solid as shown in the figures so that it can be held by people on the platform 31 to stabilize themselves and to block the movement of loads at height.

[0055] Drive system

[0056] The drive system includes a winch 41, a plurality of drive pulleys 42, a first drive cable 43 and a second drive cable 44.

[0057] Preferably, the first drive cable 43 and the second drive cable 44 are metal cables.

[0058] Alternatively, the first drive cable 43 and the second drive cable 44 could constitute a single drive cable which would be fixed in its middle to the winch 41.

[0059] The winch 41 is placed under the base 11 and allows the winding and unwinding of the first drive cable 43 and the second drive cable 44.

[0060] The winch 41 is preferably an electric winch whose operation is controlled by a user.

[0061] Advantageously, the operation is controlled remotely by a remote control type device or smartphone worn by the user.

[0062] The end not connected to the winch 41 of the first drive cable 43 is fixed to the first side frame 21 and the end not connected to the winch 41 of the second drive cable 44 is fixed to the second side frame 22.

[0063] Each drive cable 43, 44 passes through a portion of the pulleys of the plurality of drive pulleys 42. Preferably, as shown in [Fig.2], each drive cable 43, 44 passes through three drive pulleys 42, one fixed at the bottom of the side frame 21, 22 and two fixed to the corresponding side cross member 14-1, 14-2.

[0064] Transmission system

[0065] The transmission system includes a set of transmission pulleys 52 and a set of transmission cables 54.

[0066] Preferably, the transmission cables 54 are metallic cables.

[0067] In the first embodiment not shown in the figures, the transmission pulley assembly 52 comprises four transmission pulleys 52 and the transmission cable assembly 54 comprises four transmission cables 54-1, 54-2, 54-3, 54-4.

[0068] In this embodiment, the transmission pulleys 52 are fixed to the two upper corners of the first lateral frame 21 and to the two upper corners of the second lateral frame 22.

[0069] The transmission cable 54-1 and the transmission cable 54-3 are fixed on one side to the ends of the first lateral cross member 14-1 and on the other side to the platform 31 via respectively a first transmission pulley 52 and a third transmission pulley 52.

[0070] The transmission cable 54-2 and the transmission cable 54-4 are fixed on one side to the ends of the second lateral cross member 14-2 and on the other side to the platform 31 via respectively a second transmission pulley 52 and a fourth transmission pulley 52.

[0071] In the second embodiment shown in the figures, the transmission pulley assembly 52 comprises eight transmission pulleys 52 and the transmission cable assembly 54 comprises eight transmission cables 54-1, 54-2, 54-3, 54-4.

[0072] In this embodiment, the transmission pulleys 52 are fixed to the two upper corners of the first lateral frame 21, the second lateral frame 22, the third lateral frame 23 and the fourth lateral frame 24.

[0073] The transmission cable 54-1 and the transmission cable 54-3 are fixed on one side to the ends of the first lateral cross member 14-1 and on the other side to the bottom of the third lateral frame 23 via respectively a first transmission pulley 52 and a third transmission pulley 52.

[0074] The transmission cable 54-2 and the transmission cable 54-4 are fixed on one side to the ends of the second lateral cross member 14-2 and on the other side to the bottom of the fourth lateral frame 24 via respectively a second transmission pulley 52 and a fourth transmission pulley 52.

[0075] The transmission cable 54-5 and the transmission cable 54-7 are fixed on one side to the top of the first lateral frame 21 and on the other side to the platform 31, each via a transmission pulley 52.

[0076] The transmission cable 54-6 and the transmission cable 54-8 are fixed on one side to the top of the second lateral frame 22 and on the other side to the platform 31, each via a transmission pulley 52.

[0077] Example of implementation

[0078] When a user wants to use the device 1 to raise people, for example the user himself, or loads, he must first move the device 1 on its casters 16 and position the stabilizing feet 18 on either side of the fixed frame 10 in order to ensure the immobility of the device 1 during use.

[0079] The load or persons are mounted on the platform 31 and the user activates the winch 4L

[0080] This activation can be manual, by operating a switch, or preferably remotely, via a remote control for example.

[0081] In the event that the user wishes to raise the load or persons, the user operates the winch 41 so that the winch 41 winds the first drive cable 43 and the second drive cable 44.

[0082] The winding of the first drive cable 43 and the second drive cable 44 causes the upward pull of the first lateral frame 21 and the second lateral frame 22.

[0083] The drive system ensures that the traction is identical for the first lateral frame 21 and the second lateral frame 22 so that the first lateral frame 21 and the second lateral frame 22 are at all times parallel to each other and at the same height with respect to the base 11 of the fixed frame 10.

[0084] The first side frame 21 and the second side frame 22 each slide between two vertical uprights 12 and sliding means, such as rollers or a The rail system allows for the vertical translation of the first lateral frame 21 and the second lateral frame 22.

[0085] The various transmission pulleys 42 allow the torque exerted by the winch 41 to be converted into a multiplied pulling force of the first lateral frame 21 and the second lateral frame 22, which makes it possible to use the device 1 with large loads without requiring a high-power winch 41.

[0086] In the first embodiment not shown in the figures, there is only a first lateral frame 21 and a second lateral frame 22. The movement of the first lateral frame 21 caused by the winding of the drive cable 43 by winch 41 pushes the transmission cables 54-1 and 54-3, fixed between the first cross member 14-1 of the fixed frame 10 and the platform 31 of the moving frame 30.

[0087] Similarly, the movement of the second lateral frame 22 caused by the winding of the drive cable 44 by winch 41 pushes the transmission cables 54-2 and 54-4, fixed between the second cross member 14-2 of the fixed frame 10 and the platform 31 of the mobile frame 30.

[0088] Since the transmission cables 54-1, 54-2, 54-3, 54-4 have a constant length and are fixed immobile to the fixed frame 10, the identical displacement of the first lateral frame 21 against the transmission cables 54-1, 54-3 and of the second lateral frame 22 against the transmission cables 54-2, 54-4 causes the uniform elevation of the movable frame 30.

[0089] The transmission pulleys 52 ensure uniform movement and prevent the friction of the transmission cables 54-1, 54-3 against the first lateral frame 21 and of the transmission cables 54-2, 54-4 against the second lateral frame 22 from damaging the device 1.

[0090] The transmission cables 54-1, 54-2, 54-3 and 54-4 are dimensioned accordingly so that when the winding of the winch 41 reaches its maximum, the platform 31 of the movable frame 30 is at its highest.

[0091] To lower the platform 31 after use, the user activates the winch 4L in the same way, manually or remotely.

[0092] Conversely, the unwinding of the drive cables 43, 44 causes the descent of the first lateral frame 21 and the second lateral frame 22, and this descent of the lateral frames causes the descent of the platform 31 via the transmission cables 54-1, 54-2, 54-3, 54-4.

[0093] In the embodiment shown in Figures 3 and 4, there is a third lateral frame 23 and a fourth lateral frame 24 in addition to the first lateral frame 21 and the second lateral frame 22.

[0094] In this embodiment, when the winch 41 winds the first drive cable 43 and the second drive cable 44, the first lateral frame 21 pushes the transmission cables 54-1 and 54-3, fixed between the first lateral cross member 14-1 of the fixed frame 10 and the bottom of the third lateral frame 23, and the second lateral frame 21 pushes the transmission cables 54-2 and 54-4, fixed between the second lateral cross member 14-2 of the fixed frame 10 and the bottom of the fourth lateral frame 23.

[0095] Since the transmission cables 54-1, 54-2, 54-3, 54-4 have a constant length and are fixed immobile to the fixed frame, the displacement of the first lateral frame 21 against the transmission cables 54-1 and 53-3 causes the vertical translation of the third lateral frame 23 and the displacement of the second lateral frame 21 against the transmission cables 54-2 and 53-4 causes the vertical translation of the fourth lateral frame 24.

[0096] Just as the first lateral frame 21 and the second lateral frame 22 are at all times parallel and at the same height, the third lateral frame 23 and the fourth lateral frame 24 are at all times parallel and at the same height with respect to the base 11 of the fixed frame 10.

[0097] Preferably as shown in Figures 3 and 4, the third side frame 23 is fitted into the first side frame 21 and slides by means of sliding, such as rollers or a rail system, and the fourth side frame 24 is fitted into the second side frame 22 and slides by means of sliding, such as rollers or a rail system.

[0098] During this vertical translation, the third lateral frame 23 pushes the transmission cables 54-5 and 54-7, fixed between the top of the first lateral frame 21 and the movable armature, and the fourth lateral frame 24 pushes the transmission cables 54-6 and 54-8 fixed between the top of the second lateral frame 22 and the movable armature 30.

[0099] Since the transmission cables 54 have a constant length and are fixed immobile at the top of the first lateral frame 21 and the second lateral frame 22, the relative displacement of the third lateral frame 23 with respect to the first lateral frame 21 and of the fourth lateral frame 24 with respect to the second lateral frame 22 comes into contact with the transmission cables 54-5, 54-6, 54-7, 54-8 and causes the mobile armature 30 to rise.

[0100] The transmission pulleys 52 ensure uniform movement and prevent the friction of the transmission cables 54-5, 54-7 against the third lateral frame 23 and the friction of the transmission cables 54-6, 54-8 against the fourth lateral frame 24 from damaging the device 1.

[0101] The transmission cables 54-5, 54-6, 54-7, 54-8 are dimensioned accordingly so that when the winding of the winch 41 reaches its maximum, the platform 31 is at its highest.

[0102] To lower the platform 31 after use, the user activates the winch 41 in the same way, manually or remotely.

[0103] Conversely, the unwinding of the drive cables 43 and 44 causes the side frames 21, 22, 23, 24 to descend, and this descent of the side frames 21, 22, 23, 24 causes the platform 31 to descend.

[0104] Thus the user can lift loads by device 1 in a simple, efficient and safe manner, while being able to move heavy loads to high heights.

Claims

1. Demands Telescopic lifting platform device (1), said device (1) comprising: - a fixed frame (10) configured to rest on the ground and comprising a horizontal rectangular base (11) from which extend vertically upwards, from the four corners of said base (11), four vertical uprights (12) defining a front face (FA), a rear face (ARR) and two side faces (FL1, FL2), the fixed frame (10) further comprising a first horizontal lateral cross member (14-1) and a second horizontal lateral cross member (14-2), parallel to each other and each connecting two vertical uprights (12) at the level of each side face, - a first lateral frame (21) and a second lateral frame (22) extending vertically parallel to each other, perpendicular to the base (11) of the fixed frame (10) between the two lateral cross members (14-1, 14-2), - a mobile frame (30) comprising a platform (31) mounted between the four vertical uprights (12) and the lateral frames (21, 22), - a drive system comprising a winch (41) fixed to the fixed frame (10), at least one first drive pulley (42) mounted on the first lateral cross member (14-1), at least one first drive cable (43) connected on one side to the winch (41) and on the other side to the first lateral frame (21) via said first drive pulley (42), at least one second drive pulley (42) mounted on the second lateral cross member (14-2) and at least one second drive cable (44) connected on one side to the winch (41) and on the other side to the second lateral frame (22) via said second drive pulley (42), - a transmission system comprising a first transmission pulley (52) fixed to the first lateral frame (21), a first transmission cable (54-1) fixed on one side to the first lateral cross member (14-1) and on the other side to the platform (31) via said first pulley transmission (52), at least one second transmission pulley (52) fixed on the second side frame (14-2), at least one second transmission cable (54-2) fixed on one side to the second side cross member (14-2) and on the other side to the platform (31) via said second transmission pulley (52).

2. Telescopic lifting platform device (1) according to claim 1, wherein the drive system comprises a single winch (41) fixed to the fixed frame (10).

3. Telescopic lifting platform device (1) according to claim 1, wherein the drive system comprises two winches (41), a first winch (41) and a second winch (41), fixed to the fixed frame (10), the first drive cable (43) being connected to the first winch (41) and the second drive cable (44) being connected to the second winch (41).

4. A telescopic lifting platform device (1) according to any one of the preceding claims, wherein the drive system comprises at least one third drive pulley (42), one fourth drive pulley (42), one fifth drive pulley (42) and one sixth drive pulley (42), said third drive pulley (42) being mounted on the fixed frame (10) vertically above the first drive pulley (42), said fourth drive pulley (42) being mounted on the fixed frame (11) vertically above the first drive pulley (42), said fifth drive pulley (42) being mounted on the first side cross member (14-1), said sixth drive pulley (42) being mounted on the second side cross member (14-2),the first drive cable (43) passing through the third drive pulley (42) and the fifth drive pulley (42) and the second drive cable (44) passing through the fourth drive pulley (42) and the sixth drive pulley (42).

5. A telescopic lifting platform device (1) according to the preceding claims, wherein the transmission system comprises at least one third transmission pulley (52) fixed to the first lateral frame (21), a third transmission cable (54-3) fixed on one side to the first lateral cross member (14-1) and on the other part to the platform (31) via said third transmission pulley (52), at least one fourth transmission pulley (52) fixed on the second lateral frame (22), at least one fourth transmission cable (54-4) fixed on one side to the second lateral cross member (14-2) and on the other side to the platform (31) via said fourth transmission pulley (52).

6. Telescopic lifting platform device (1) according to the preceding claim, wherein the first transmission cable (54-1) and the third transmission cable (54-3) are fixed to the two ends of the first side cross member (14-1) and the second transmission cable (54-2) and the fourth transmission cable (54-4) are fixed to the two ends of the second side cross member (14-2).

7. Telescopic lifting platform device (1) according to any one of the preceding claims, comprising a third lateral frame (23) and a fourth lateral frame (24) extending vertically parallel to each other, perpendicular to the base (11) of the fixed frame (10) between the two lateral cross members (14-1, 14-2), and on either side of the movable frame (30).

8. Telescopic lifting platform device (1) according to the preceding claim, wherein the first lateral frame (21) and the third lateral frame (23) extend in the same plane and slide over each other by means of a sliding mechanism, and the second lateral frame (22) and the fourth lateral frame (24) extend in the same plane and slide over each other by means of a sliding mechanism.

9. Telescopic lifting platform device (1) according to any one of the preceding claims, wherein the fixed frame (10) comprises a plurality of rollers (16).

10. Telescopic lifting platform device (1) according to any one of the preceding claims, wherein the fixed frame (10) comprises at least one stabilizing foot (18) fixed to a vertical post (12).

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