Self-leveling lifting table for handling materials with reinforced base

Abstract

The invention relates to a lifting handling table with automatic level adjustment (1), comprising: - a platform (2); - a supporting structure (3) having first to third parallel longitudinal members (31, 32, 33) joined by first and second beams (34, 9), first and second openings (35, 36) being provided under the first beam (34) between the longitudinal members, third and fourth openings (95, 96) being provided under the second beam (9) between the first, second and third longitudinal members, the first to fourth openings being configured to allow the insertion of a forklift fork; - a vertical spring (41) having a first end acting on the platform (2) and a second end acting on the second longitudinal member, in which the first and / or second beam (34, 9) has a circular part extending horizontally around at least a part of the spring (41).Figure to be published with the abbreviation: Fig. 1.

Description

Title of the invention: Self-leveling lifting handling table with reinforced base

[0001] The invention relates to the field of handling packages or objects, and in particular to the field of lifting tables or leveling tables intended to collect or distribute these packages and designed to be stackable by forklifts or stackers.

[0002] Known lifting tables comprise a platform that slides vertically relative to a frame placed on the ground or transported by a trolley. The frame has a space beneath a supporting structure, allowing the passage of fixed lower forks and lifting forks of the trolley to raise the table and enable its movement, with or without a load. One or more vertical springs are interposed between the supporting structure and the platform to allow the platform's level to be adjusted according to its load through their progressive elastic deformation. Such a table is therefore particularly ergonomic for allowing operators to load and unload packages.

[0003] To limit bulk and facilitate stacking, these lifting tables may include basic parts in the form of stringers and crossbeams.

[0004] Given the loads that the lifting table must bear, the support parts of the load-bearing structure eventually deform during use, particularly due to horizontal stresses. Unfortunately, the size of the vertical spring(s) limits the possibilities for reinforcing the support parts of the load-bearing structure.

[0005] The invention aims to resolve one or more of these drawbacks. The invention thus relates to a lifting handling table with automatic leveling adjustment, characterized in that it comprises: -a platform; -a load-bearing structure comprising first, second, and third parallel longitudinal members extending along a longitudinal direction, comprising first and second beams extending along a transverse direction and connecting the first, second, and third longitudinal members at their first and second longitudinal ends respectively, first and second openings being provided under the first beam between the first and second longitudinal members on the one hand and between the second and third longitudinal members on the other hand, third and fourth openings being provided under the second beam between the first and second longitudinal members on the one hand and between the second and third longitudinal members on the other hand, the the first to fourth openings being configured to allow the insertion of a forklift fork; -at least one vertical spring having a first end acting on the platform and a second end acting on the second side member and housed within the second side member, in which the first and / or second beam (34, 9) has a circular part extending horizontally around at least a part of the spring.

[0006] The invention also relates to variants of the dependent claims. Those skilled in the art will understand that each of the features of the independent claims and of the description can be combined independently with the features of an independent claim, without thereby constituting an intermediate generalization.

[0007] According to one variant, the self-leveling lifting handling table comprises several vertical springs aligned along the longitudinal direction and having their second end bearing on the second spar and housed in the second spar, in which the first and second beams each have a circular portion extending horizontally around one of said springs.

[0008] According to yet another variant, said beam is in the form of two separate arms, one being anterior and the other being posterior to said spring.

[0009] According to another variant, said beam has a hollow profile shape.

[0010] According to yet another variant, said beam comprises on an underside, at least a receiving skid for a trolley fork.

[0011] According to another variant, the beams comprise U-shaped sections open at the bottom.

[0012] According to yet another variant, the second longeron has a U-shaped section open upwards.

[0013] According to another embodiment, the lifting table comprises at least one lateral scissor system guiding the sliding platform in the vertical direction

[0014] According to yet another variant, the lateral scissor system comprises, on each lateral side, two lateral arms each having a lower end fixed to a lateral stringer, characterized in that the lateral stringers have a U or L-shaped section open upwards housing the lower ends of the arms of the lateral scissors.

[0015] According to another variant, the first to third longitudinal members have a lower face intended to form a ground support surface.

[0016] Other features and advantages of the invention will become clear from the following description, which is by way of example and not limitation, with reference to the accompanying drawings, in which:

[0017] [Fig.1] is a perspective view of a lifting handling table with automatic level adjustment according to an embodiment of the invention;

[0018] [Fig.2] is a detailed perspective view of the lifting table of [Fig.1] at level of the top of the rear beam;

[0019] [Fig.3] is a detailed perspective view of the lifting table of [Fig.1] at level of the top of the front beam;

[0020] [Fig.4] is a perspective view illustrating the underside of the lifting table of the [Fig.l].

[0021] Figure 1 is a perspective view of a level 1 self-adjusting lifting handling table according to an embodiment of the invention. The table 1 comprises a platform 2, a supporting structure 3, and a vertical spring 4L

[0022] The supporting structure 3 comprises first, second and third parallel stringers 31 to 33. These stringers 31 to 33 extend along a longitudinal direction X. These stringers 31 to 33 serve where appropriate to form supports on the ground of the table 1, ensure its rigidity in bending around a transverse axis Y and ensure the connection between transverse beams.

[0023] In particular, the first, second, and third side members 31, 32, 33 have a hollow structure, for example, of the profiled type. The second side member 32 is in a central position and has an upward-opening U-shaped section. The vertical spring 41 has a first end acting on the platform 2 and a second end acting on the second side member 32. The elastic force provided by the spring 41 is proportional to the load applied to the platform 2 and allows the level to be automatically adjusted along the vertical direction Z of the platform 2 according to the load. This system therefore provides an ergonomic function, allowing an operator to load the platform 2 at a satisfactory level, regardless of the load already applied to the platform 2. The second end of the spring 41 is housed in the second side member 32 between the first and second openings 35 and 36, thanks to the upward-opening U-shaped section of this side member 32.The second end of the spring 41 is thus housed between the vertical sides of this longitudinal member 32, and part of the spring can therefore be positioned close to the ground, with forklift pockets on either side of the spring 4L. The vertical dimensions of the spring 41 can thus be reduced, allowing for greater travel for the platform 2 and thus enabling a larger load under good ergonomic conditions. Furthermore, the platform 2 can be lowered closer to the ground when loaded, ensuring greater stability.

[0024] In the example illustrated here, table 1 comprises several vertical springs 41, 42 and 43 aligned along the longitudinal direction X and having their second end acting on the second spar 32 and housed in the second spar between first and second openings 35 and 36 or between openings 95 and 96 (detailed below). This allows for greater spring stiffness and distribution of the elastic force along the longitudinal direction.

[0025] In the illustrated variant, the side rails 31, 33 have a hollow structure open upwards, more preferably with an L-shaped section with a lower blade and an internal blade.

[0026] The structure 3 comprises at least one beam 34 (referred to as the front beam) extending along the transverse direction Y and connecting the longitudinal members 31 to 33 at a first longitudinal end. First and second openings 35 and 36 are provided under the transverse beam 34 between the first and second longitudinal members 31 and 32 on one side, and between the second and third longitudinal members 32 and 33 on the other. The openings 35 and 36 serve to provide longitudinal passage for the forks of a forklift, allowing the table 1 to be moved to another location and enabling the passage of the lower forks during loading with a stacker. The transverse beam 34 serves both to connect the longitudinal members 31 to 33 and to form a lifting interface for the forks of a forklift or a stabilizing interface for the forks of a stacker.

[0027] Furthermore, the structure 3 includes a beam 9 (called rear) extending along the transverse direction Y and connecting the longitudinal members 31 to 33 at a second longitudinal end.

[0028] Figure 2 shows a detailed perspective view of the rear beam 9. This crossbeam 9 serves both to connect the longitudinal members 31 to 33 and to form a lifting interface for the forks of a forklift or a stabilizing interface for the forks of a stacker, on the side opposite the openings 35 and 36. To this end, openings 95 and 96 are provided under the crossbeam 9 between the first and second longitudinal members 31 and 32 on one side, and between the second and third longitudinal members 32 and 33 on the other. The openings 95 and 96 are, of course, left freely accessible so as not to interfere with the passage of forks.

[0029] The beam 9 here comprises vertical walls 93 and 98 attached to the stringer 33, vertical walls (only wall 92 is illustrated) attached to the stringer 32 and vertical walls (only wall 91 is illustrated) attached to the stringer 31.

[0030] The beam 9 is made in two portions 9a and 9b surrounding the spring 43 at the front and rear. The portion 9a (rear) comprises a first circular part 43a extending horizontally around a portion of the spring 43, here over more than the rear half of the spring 43. The portion 9b (front) comprises a second circular part 43b extending horizontally around a portion of the spring 43, here over less than the front half of the spring 43. The portions 9a and 9b are fixed together around the spring 43.

[0031] Portions 9a, 9b allow the structure 3 to be reinforced horizontally by using the maximum space around the springs 41, 43 while minimizing dead volumes.

[0032] In order to stiffen beam 9 and thus structure 3: -portion 9a comprises two vertical walls 93, 98 (and 91) in particular parallel to the Y and Z directions, each attached to a horizontal lower plate of the stringers 33 (and 31); -portion 9b includes a vertical wall 99, in particular parallel to the X and Z directions, attached to an internal vertical plate of the stringers 33 (and 31) parallel to the X and Z directions; -portions 9a and 9b each include a vertical plate 92, in particular parallel to the Y and Z directions, attached to a lower horizontal plate of the spar 32.

[0033] The same arrangement is preferably provided for the beam 34 opposite the spring 41, illustrated in [Fig.3].

[0034] Preferably, the beams 34, 9 comprise on an underside, pads 37 for receiving a trolley fork. These pads 37 prevent the fork from slipping and cushion the shocks of lifting the table by the trolley. These pads are illustrated in [Fig. 4].

[0035] In the illustrated embodiment, the lower end of the scissor arms is housed in the U-shaped or L-shaped recess of the side rails 31, 33. More precisely, the folded scissor arms are housed in the U-shaped or L-shaped recess of the side rails 31, 33. Thus, space savings are maximized in this embodiment when the table is folded. It can advantageously have a size of less than 20 cm in the folded position, in particular a minimum size of approximately 16 cm.

[0036] In the example illustrated here, the side members 31, 32, and 33 have a lower face intended to form a bearing surface on the ground. Preferably, the side members 31, 32, and 33 also have pads 38 (illustrated in [Fig. 4]). The pads 37 and 38 may be made of steel or an anti-slip material.

Claims

Demands

1. Automatic leveling lifting handling table (1), characterized in that it comprises: -a platform (2);-a load-bearing structure (3) comprising first (31), second (32) and third (33) parallel stringers extending along a longitudinal direction (X), comprising first and second beams (34, 9) extending along a transverse direction (Y) and connecting the first (31), second (32) and third (33) stringers at the level of the first and second longitudinal ends respectively, first and second openings (35, 36) being provided under the first beam (34) between the first (31) and second (32) stringers on the one hand and between the second (32) and third (33) stringers on the other hand, third and fourth openings (95, 96) being provided under the second beam (9) between the first (31) and second (32) stringers on the one hand and between the second (32) and third (33) stringers on the other hand, the first to fourth openings (34, 9, 35, 36) being configured to allow the insertion of a forklift fork;-at least one vertical spring (41, 43) having a first end acting on the plate (2) and a second end acting on the second spar and housed in the second spar (32), in which the first and / or second beam (34, 9) has a circular part (43a, 43b) extending horizontally around at least a part of the spring (41).;

2. Self-leveling lifting handling table (1) according to claim 1, comprising several vertical springs (41, 42) aligned along the longitudinal direction (X) and having their second end acting on the second spar (32) and housed in the second spar, wherein the first and second beams (34, 9) each have a circular portion extending horizontally around one of said springs (41, 42).

3. Self-leveling lifting handling table (1) according to claim 1 or 2, wherein said beam (34, 9) is in the form of two separate arms, one being anterior and the other being posterior to said spring (4).

4. Self-leveling lifting handling table (1) according to any one of the preceding claims, wherein said beam (34, 9) has a hollow profile shape.

5. Self-leveling lifting handling table (1) according to any one of the preceding claims, wherein said beam (34, 9) comprises on an underside face, at least one receiving pad (37) for a trolley fork.

6. Self-leveling lifting handling table (1) according to any one of the preceding claims, wherein the beams (34, 9) comprise downward-opening U-shaped sections.

7. Self-leveling lifting handling table (1) according to any one of the preceding claims, wherein the second longitudinal member (32) has an upwardly open U-shaped section.

8. Self-leveling lifting handling table (1) according to any one of the preceding claims, comprising at least one lateral scissor system (5) guiding the platform (2) in sliding along the vertical direction (Z).

9. Self-leveling lifting handling table (1) according to the preceding claim, wherein the lateral scissor system comprises, on each lateral side, two lateral arms each having a lower end fixed to a lateral stringer, characterized in that the lateral stringers have an upward-opening U or L-shaped section housing the lower ends of the lateral scissor arms.

10. Self-leveling lifting handling table (1) according to any one of the preceding claims, wherein the first to third stringers (31, 32, 33) have a lower face intended to form a ground support surface.

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