BE1026784B1 - LIFTING TABLE - Google Patents

Abstract

The present invention relates to a lifting table (1) which can pass from a folded position to an unfolded position, and vice versa, comprising a sub-frame (2) comprising two first sections (6, 7) arranged parallel to one another. 'other, and connected to each other by at least one transverse element (8), a frame (3) intended to support a plate and comprising two second sections (9, 10) arranged parallel to one other and relative to said first sections (6, 7) of said subframe (2), means (4) for vertical displacement of said chassis (3) relative to said subframe (2) comprising two series (13, 14) lifting arms (131, 132, 141, 142) pivotally connected to each other with respect to an axis AA 'and comprising an end movable in translation on or in said first elements (6, 7 ) or under or in said second sections (9, 10), and an end pivotally mounted relative to said sub-frame (2) or to said frame (3), means (5) for driving ement of said displacement means (4) comprising one end pivotally fixed to said transverse element (8) and the other end comprising first support means (16) bearing and moving on first pushing means (17) , said first thrust means (17) being pivotally mounted along said axis A-A 'and being connected, via a crosspiece (173), to the upper part of the lifting arms (131, 141) which are movable in translation under or in said second profiles (9, 10)

Description

LIFTING TABLE

Object of the invention

The present invention relates to a lifting table, in particular a veterinary lifting table, intended for the movement of large and heavy animals, said veterinary lifting table comprising scissor arms, and which is of small footprint.

State of the art

In the medical field, in particular veterinary, consultation tables, examination or surgery, are well known devices, allowing the nursing staff to be able to intervene at breast height. They generally consist of a stainless steel tray, supported by four horizontal feet. For mobile tables, the lower end of the legs is fitted with castors

Such veterinary tables have the disadvantage of requiring the employment of several people to lift the animal, which can be a large animal, possibly sedated, in order to install it on the table. In addition, not only is such a table bulky, but it also has the disadvantage of not being adjustable in height to adapt to the size of the nursing staff.

This is why, lifting tables have been proposed which make it possible to raise the animal at breast height.

For example, US Patent US 2,794,694 describes an operating table comprising a horizontal subframe, from the center of which extends a hydraulic piston supporting at its free end a horizontal plate.

American patent US2007125314 describes a mobile veterinary preparation table, adjustable in height, comprising inclined edges and one end of which includes four round joints sliding on two vertical tubular columns of a vertical frame, and set in motion by a piston arranged vertically in this vertical frame.

DE 8 914 070 describes a height-adjustable hospital bed comprising a scissor lifting mechanism comprising two pairs of lifting arms pivotally connected to each other at a pivot point , called scissor arms, and set in motion by a piston, fixed on the upper part of one of the

BE2018 / 5799 arm, and one end of which comprises rollers interacting with the convex shape of the lower portion of the scissor arm.

Lifting tables are also known in non-medical or veterinary fields.

For example, patent application CN103508372 describes a lifting table with scissor arms, set in motion by the action of two pistons, one per pair of scissor arms, fixed to the lower portion of one of the arms. scissors, and comprising at their end rollers engaging the inside of the upper end of the scissor arm having a convex shape.

The international patent application WO8805759 describes a lifting table for a vehicle comprising two pairs of scissor arms having a "U" section, two of the arms each of which comprises a piston, the free end of which comprises two rollers moving in the arm section and engaging a straight ramp arranged in the bottom of the arm section and a convex ramp facing the straight ramp and arranged in the bottom of the complementary scissor arm section.

Patent application FR 1 343 743 describes a lifting table comprising scissor arms, deployed by means of a piston, the free end of which comprises a beam, each of the ends of which comprises a roller engaging a first ramp. convex, disposed on the side member of the subframe of a lifting table, and a second convex ramp forming an integral part of the lower portion of a scissor arm, and facing the first ramp.

Objects of the invention

The present invention aims to provide a lifting table which does not have the drawbacks of the state of the art.

A preferred object of the present invention is to provide a veterinary lifting table having a reduced size, and whose deployment and folding is done constantly, smoothly.

Summary of the invention

The present invention relates to a lifting table which can pass from a folded position to an unfolded position, and vice versa, comprising

- a sub-frame, forming the base of the table and intended to rest on the ground, said sub-frame comprising two first sections arranged in parallel

BE2018 / 5799 to each other, and connected to each other by at least one transverse element, preferably forming the front of the lifting table,

- a frame intended to support a plate and comprising two second sections arranged parallel to one another and with respect to the first sections of the sub-frame,

means of vertical displacement of the chassis with respect to the sub-chassis (that is to say a vertical displacement of the chassis with respect to the sub-chassis when the sub-chassis rests on the ground), these means of displacement of said chassis comprising two series of lifting arms pivotally connected to each other with respect to an axis A-A 'and comprising a movable end in translation on or in the first profiles or under or in the second profiles, and a mounted end swivel relative to the subframe or chassis, and

- drive means and displacement means comprising one end pivotally attached to the transverse element and another end comprising first support means bearing and moving on first pushing means of said first support means, said first thrust means being pivotally mounted along the axis A-A 'and being connected, via a cross member, to the upper part of the lifting arms which are movable in translation under or in said second profiles.

According to particular modes of the invention, the lifting table according to the invention comprises at least one, or any suitable combination, of the following preferred characteristics:

the first support means comprise or consist of two rollers arranged at the end of an axis, said axis being oriented perpendicular to the axis of the drive means and of displacement means,

- The first pushing means of said first support means, comprise or consist of a first portion having a surface with a convex curvature, on which move said first support means and in a second portion, adjacent to the first portion thrust elements of said first support means, which is longitudinal and at the end of which the crosspiece engages

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- The lifting table further comprises second support means mounted pivoting along the axis AA 'and being linked, via a cross member, to the upper part of the lifting arms movable in translation on or in the elements of the sub-frame, the second support means comprise or consist of two rollers arranged on the axis carrying the first support means,

the pushing means of the second support means comprise or consist of cams, a first portion of which comprises a surface having a convex curvature on which the second support means move,

- the convex curvature of the pushing means has a convexity directed towards the frame, when the lifting table is folded and has a convexity directed substantially towards the front of the lifting table, when the lifting table is unfolded,

- the axis carrying the support means is fixed to the drive means via a sectional housing in the shape of a "U", comprising or consisting of two vertical edges between which are placed spacers arranged parallel audits vertical edges, possibly also a longitudinal reinforcement and / or two longitudinal axes arranged substantially in position parallel to the axis,

- the means for driving the displacement means comprise or consist of an electric actuator,

- the lifting table also comprises a plate arranged on the chassis,

- the profiles of the chassis and / or the plate comprise means for fixing an extension of the plate,

- The profiles of the chassis and / or the plate comprise means for attaching accessories.

- the subframe of the table further comprises at least one second transverse element connecting the two first sections and preferably forming the rear of the lifting table, the second element being able to serve as the basis for an electric transformer.

Preferably, the lifting table is used for medical use, in particular veterinary use.

BE2018 / 5799

The present invention will be described below in detail, with reference to the figures and in an embodiment presented by way of non-limiting illustration of the invention.

Brief description of the figures

Figure 1 is a schematic representation of a side perspective view of the lifting table according to the invention which is unfolded.

Figure 2 is a schematic representation of a perspective view of another side of the lifting table according to the invention which is unfolded.

Figure 3 is a schematic representation of a perspective view from above of the lifting table according to the invention which is deployed.

Figure 4 is a schematic representation of a side perspective view of the lifting table according to the invention which is folded.

Figure 5 is a schematic representation of a perspective view from above of the lifting table according to the invention which is folded.

Figure 6 is a schematic representation of a side view of a first pusher element.

Figure 7 is a schematic representation of a side view of a second pusher element.

Figure 8 is a schematic representation of a side view in perspective of the housing housing the axis supporting the support elements.

Detailed description of the invention

In the following description and claims, the terms "top" and "bottom", "front" and "rear", "above" and "below", "upper" and "lower", "Vertical" and "horizontal" refer to the normal position of use of the device according to the invention, in particular to the position as shown in Figures 1 to 8.

By way of nonlimiting example, the lifting table 1 according to the invention will be described for medical use, in particular veterinary, of generally parallelepiped shape. However, such a lifting table 1 can have all the appropriate shapes and dimensions and be used in other technical fields, in particular non-medical fields.

The lifting table 1 comprises a subframe 2, a chassis 3 intended to support a tray, means 4 for vertical movement of the chassis 3 by

BE2018 / 5799 relative to the sub-frame 2, means 5 for driving the means 4 for movement and possibly a plate.

Preferably, the subframe 2 has a section in the horizontal plane of the ground, in the X-Y plane, in the shape of "U" (Figure 1). It comprises or consists of at least two first sections 6 and 7 which are parallel, or substantially parallel, with respect to one another. Preferably, these are the first two sections, paths or rails, of section in the XZ plane in the shape of a "U", the opening of which faces the upper part of the lifting table 1. The sections 6 and 7 are connected to each other by at least a first element or transverse rail 8, arranged perpendicular to said first profiles 6 and 7, preferably at one of the ends of the first profiles 6 and 7. This first element or rail transverse 8 forms an axis of articulation for the means 5 for driving the means 4 for vertical displacement of the chassis 3. It also defines what will be considered in the following description as the front of the sub-chassis 2 of the lifting table 1, while the rear is formed by the side opposite to this element or transverse rail 8, in particular by the opening of the "U" of the XY section. Advantageously, the sub-frame 2 also includes a second, a third and / or a fourth element or transverse rail (not shown) capable of strengthening the sub-chassis 2 and capable of serving as a support or reinforcing a base for an electrical element, such as a transformer.

Preferably, the elements 6, 7 and 8 of the subframe 2 are in contact with the ground or a base on which it rests; however, the subframe 2 may include displacement means, making it possible to make the lifting table 1 mobile. It may be, for example, wheels or casters, advantageously arranged under the first parallel sections 6 and 7 and / or under the element or transverse rail 8, wheels or casters possibly provided with brake means.

The frame 3 of the lifting table 1 of the invention is intended to support a tray. Preferably, it comprises two second sections 9 and 10, substantially parallel to one another, and substantially parallel respectively to the first sections 6 and 7 of the subframe 2, and form paths or rails. Each second section 9,10 has at least one portion having a section in the XZ plane, in the shape of an "L" or partially of an inverted "U", their opening being directed towards the bottom of the lifting table 1, therefore facing the subframe 2. The second sections 9, and 10

BE2018 / 5799 are connected by a first cross member or rail 11, arranged and forming the front of the chassis 3 and therefore of the lifting table 1, preferably two cross members 11 and 12.

The plate, supported by the chassis 3, is any rigid support that can receive a load. In the case of a veterinary lifting table 1, the platform must be able to support, without bending, the weight of an animal, for example of about 80 kg or more (preferably for a load of less than 100 kg). Preferably, the tray is made of stainless steel or plastic, that is to say a light and easily cleanable material, such as polyethylene or polypropylene and includes flanges, of about 1 to 2 cm for example, each of these edges to avoid the flow of fluids along the edges or ends of this tray. Advantageously, the plate comprises means for recovering fluids which may be there, and these means for recovering fluids cooperate with means for removing these fluids.

The second profiles 9, 10 and / or the tray can also include means for fixing an extension of the tray, for example orifices forming fixing points, the extension can be arranged under the tray, on or between the second sections 9, 10, and possibly be mobile.

The second sections 9 and 10 and / or the tray can also include means for attaching accessories to the lifting table 1, such as for example link fixings, an infusion holder, a support for supporting the anesthesia tube , a support for fixing a member of the animal. Preferably, these fixing means can be movable along the second sections 9 and 10 and / or the plate. These means can be or include rails arranged around the plate.

The means 4 for vertical displacement of the chassis 3 make it possible to move the chassis 3, and therefore the plate supported by the chassis 3, from a position called "low" or "folded", in which the chassis 3 is close to the sub chassis 2, and therefore of the ground on which the sub-chassis or its wheels rests (figure 4), in a so-called "high" or "unfolded" position in which the chassis 3 is distant from the sub-chassis 2, therefore from the ground (figure 1), and vice versa.

These vertical displacement means 4 comprise a first series 13 of two lifting arms 131 and 132, forming a first side of the lifting table 1 when the latter is in the high position, and a second series 14, of two lifting arms lifting 141 and 142, forming a second side of the lifting table 1, opposite the

BE2018 / 5799 first side. The lifting arms 131, 132, 141 and 142, in the unfolded position, thus define an internal space 15 of the lifting table 1.

The lifting arms 131 and 132 of the first series 13, like the lifting arms 141 and 142 of the second series 14, are said arms "of scissors", because each complementary arm of a series, the arms 131 and 132 on the one hand, and the arms 141 and 142 on the other hand, are linked to each other in a pivoting manner, each series of arms relative to a determined pivot point, respectively A and A ' , preferably located equidistant from the ends of each lifting arm 131, 132, 141 and 142. Through the pivot points A and A ', passes a pivot axis A-A' relative to which the lifting arms 131 , 132, 141 and 142 fold and unfold (Figure 2).

Preferably, the axis A-A ’engages the lifting arms 131, 132, 141 and 142 by means of a metal ring, preferably a ring made of bronze, in order to limit friction.

Each complementary lifting arm 131 and 132 or 141 and 142 includes a so-called "upper" part, located above the axis A-A ', and therefore between the axis A-A' and the chassis 3, and a so-called “lower” part, located below the axis A-A 'and therefore between the axis A-A' and the subframe 2.

Each complementary lifting arm 131 and 132 or 141 and 142 includes an end movable in translation relative to the sub-frame 2 or to the frame 3, and a fixed end, namely not movable in translation, but articulated, namely swivel, relative to subframe 2 or to chassis 3.

The arms 131 and 141 include a fixed lower end, but pivotally articulated, relative to the subframe 2, preferably to the element or transverse rail 8 and an upper end respectively engaging the second sections 10 and 9 of mobile in translation. Preferably, this upper end comprises a roller or a caster engaging and able to move in, the second profile 9 or the second profile 10. The arms 132 and 142 include an upper end pivotally fixed to the frame 3, preferably at the second sections 9 and 10, advantageously also at the cross member 11, and a lower end respectively engaging the first sections 7 and 6, so as to be movable in translation. Preferably, this lower end comprises a roller or an engaging roller, which can move in or on the first profile 6 or 7.

BE2018 / 5799

The lifting arms 131, 132, 141 and 142 take any shape, have any suitable dimensions and are made of all suitable materials. Preferably, these are tubular metal elements.

The means 5 for driving the displacement means 4 allow the unfolding and folding of the lifting arms 131, 132, 141 and 142 and therefore the raising and lowering of the chassis 3 and therefore of the platform. These drive means 5 are, or comprise, at least one jack or piston, hydraulic or electric, capable of lifting the plate, provided with its load, from its low position to its high position, and vice versa. They understand or cooperate with means for supplying electricity and means for controlling the drive means.

A first end of the drive means 5 is fixed to the subframe 2 pivotally, but not movable in translation, preferably in front of the subframe 2 and therefore of the lifting table, advantageously to the element transverse 8, the second end of these means 5 comprising first support means 16 cooperating with first pushing means 17 of said first support means 16.

Preferably, the actuator is electric. It is arranged in the space 15 of the lifting table 1, the movable element of the jack, the piston, being disposed near the subframe 2, in particular of the transverse element 8, and its motor is arranged near the 'axis A-A' of the lifting arms 131, 132, 141 and 142. This has the advantage of obtaining a compact lifting table 1 once folded.

The means 5 for driving the displacement means 4 comprise at least first support means 16 cooperating with the first thrust means 171 and 172 of these first support means 16.

The first support means 16 comprise or consist of one, preferably two rollers or wheels 161 and 162, arranged at the end of an axis 163, which is oriented perpendicular to the axis of the means 5 of training.

Preferably, the ends of the axis 163 each comprise or consist of a connecting member 164 with a cross member 165, making it possible to stiffen the axis 163 and to provide a support on which the pushing means 17 come to bear and move.

BE2018 / 5799

Preferably, the rollers 161 and 162 are sealed bearings, mounted on the shaft 163 by means of metal rings, preferably rings made of bronze.

The roller 161 or the roller 162 will bear and moves on the pushing means 17 which are linked to the lifting arms 131, 141, preferably at the upper part of the lifting arms 131 and 141, the end of which lower is fixed to the subframe 2, but pivotally movable, and the upper end of which is movable in the second sections 9 and 10 of the chassis 3.

The pushing means of the support means are not, and do not form an integral part of the lifting arms 131, 141, 132 and 142. These are separate means, arranged near the lifting arms 131 , 141, 132 and 142, but to which they are physically linked.

When the lifting table 1 is folded, the roller 161 or 162 engages the end of an element 171 or 172 capable of generating a thrust of the first support means 16, having a surface comprising a convex curvature 174. [ When the drive means 5 are implemented, namely when the piston lengthens, the rollers 161, 162 move on the surface of the curved part of the elements 171 and 172 capable of generating a thrust on the first support means 16 from bottom to top, which allows the deployment of the lifting arms 131 and 141, their movable ends moving under the chassis 3, and when the piston shortens the lifting arms 131 and 141, fold back .

The convexity of the curvature of the surface of the elements 171 and 172 capable of generating a thrust on the support means 16, is directed upwards or substantially upwards, from the lifting table 1, towards the chassis 3 and the tray, when the lifting table 1 is folded (Figure 4) and it is directed towards the front, or substantially forward, of the lifting table 1 when the latter is unfolded (Figures 1 and 2).

The dimensions of the convex curvature 174 of the elements 171 and 172 of the thrust of the support elements 16, are chosen so as to allow the deployment and the folding of the lifting arms 131 and 141 at the determined height (s), allowing the user to access the animal on the table at breast height. The convex curvature 174 can also be variable along the

BE2018 / 5799 elements 171 and 172 of thrust of the support elements 16, in order to allow a variable speed of deployment and folding of the lifting arms 131 and 141.

Preferably, the elements 171 and 172 of the thrust of the support elements, have a portion, adjacent to the portion comprising the convex curvature 174, which is non-curved, advantageously longitudinal, at the end of which the elements 171 and 172 are linked to the lifting arms 131 and 141, via a cross member 173, fixed to the lifting arms 131 and 141.

Preferably, each element 171 or 172 of the thrust of the support elements 16 comprises or consists of means of connection with the other ramp 171 or 172, comprising an opening 175 in which a crosspiece 176 engages, preferably of square section, means of connection with the axis A-A ', for example an opening consisting of a through hole 177, into which the axis A-A' engages, and means in which s' engages the crossmember 173 for connection to the lifting arms 131 and 141, for example an opening consisting of a through hole 178 (FIG. 6). The support means 16 and its thrust means 171 and 172 have the advantage of regularly transmitting the thrust of the jack to the lifting arms 131 and 141 and thus have the advantage of allowing their unfolding and folding constant, that is to say smoothly.

Preferably, the means 5 for driving the displacement means 4 further comprise second support means 18 cooperating with second means 19 for pushing these second support means 18, and these are advantageously arranged at the second end of the drive means 5.

The second support means 18 comprise or consist of one, preferably two rollers or wheels 181 and 182, arranged (s) on the axis 163, between the rollers 161 and 162, preferably arranged equidistant from the rollers 161 and 162, advantageously essentially at the center of the axis 163.

Preferably, the rollers 181 and 182 are sealed bearings, mounted on the axis 163 by means of metal rings, preferably rings made of bronze.

The rollers 181 and 182 are supported and move on means 19 for pushing support means 18, which are linked to the lifting arms 132 and 142, preferably at the top of the lifting arms 132 and 142 , whose end

BE2018 / 5799 lower is movable on the elements 6, 7 of the subframe 2, and the upper end of which is pivotally attached to the chassis 3, preferably to the sections 9 and 10 and advantageously to the cross member 11.

The second means 19 for pushing the second support means 18, are not, and do not form an integral part of the lifting arms 131 and 141 as well as 132 and 142. These are separate means, arranged at near the lifting arms 131, 141, 132 and 142, but to which they are physically linked.

When the lifting table 1 is unfolded, the roller or rollers 181 and 182 engage the end of a cam 191 or 192 of said second means 19 for pushing second support means, having a surface comprising a convex curvature 194 .

When the drive means 5 are implemented, namely when the piston lengthens, the rollers 181 and 182 move on the curved part of the cams 191 and 192, which are linked to the lifting arms 132 and 142 by means of a cross-member 193, which allows the deployment of the lifting arms 132 and 142, their movable ends moving on the sub-frame 2, and when the piston shortens the lifting arms 132 and 142, fall back.

The convexity of the convex curvature 194 of the surface of the cams 191 and 192 is directed downwards, or substantially downwards, from the lifting table 1, towards the subframe 2, when the lifting table 1 is folded ( Figure 4), and the convexity of the curvature 194 will be directed towards the front, or substantially forward, of the lifting table 1, when the latter is unfolded (see Figures 1 and 2).

The dimensions of the convex curvature 194 of the cams 191 and 192 are chosen so as to allow the deployment and folding of the lifting arms 132 and 142 at the determined height (s). The shape and dimensions of the convex curvature 194 are in particular adapted to the position of the rollers 181 and 182 on the axis 163, to the position of the cross-member 193 connecting the cams 191 and 192 to the lifting arms 132 and 142 and to the convex curvature 174 of the elements 171 and 172, as well as at the position of the cross-member 173. The convex curvature 194 can also be variable along the cams 191 and 192, in order to allow a variable speed of deployment and folding of the arms 132 and 142.

The second support means 18 and its second thrust means 19, not only allow the deployment of the lifting arms 132 and 142, but they

BE2018 / 5799 have the advantage of facilitating the deployment of the lifting arms 131 and 141. In fact, these means make it possible to distribute the force provided by the drive means 5, the jack, for deployment and folding, the latter s 'then find more constant, without imbalance between the lifting arms 132 and 142 and the lifting arms 131 and 141, and therefore without imbalance of the plate.

Preferably, the cams 191 and 192 have a portion, adjacent to the portion comprising the convex curvature 194, which is not curved, which is advantageously an essentially longitudinal portion, at the end of which the cams 191 and 192 of the means of connection with the axis A-A '. For example, the connection can be obtained via an opening 195, in which the axis A-A 'engages, and by means in which the crosspiece 193 connecting to the lifting arms 132 and 142 engages, for example via a notch 196 present at the end of the cams 191 and 192, preferably present on the surface which is opposite to the surface carrying the convex curvature 194 (FIG. 7).

Preferably, the axis 163 supporting the first support means 16, and the second support means 18 if they are present, is fixed to the second end of the drive means 5 via d 'a housing 20 (Figure 4).

Preferably, and as shown in Figure 8, the housing 20 has a substantially parallelepiped shape and has a section in the XY plane when the lifting table 1 is folded (Figure 4), and in the XZ plane when the table elevator 1 is folded (FIG. 1), in the shape of a "U", comprising two vertical edges 21, 22 connected by a horizontal portion 23. This horizontal portion 23 comprises means 24 for fixing the housing 20 to the drive means 5 and displacement means 4, preferably to the cylinder motor housing. Preferably, these fixing means 24 comprise, or are, openings. Preferably, the housing 20 further comprises at least one, advantageously two spacer (s) 25 or 26.

The vertical edges 21 and 22 and the spacers 25 and 26, if they are present, include means 27 for engaging the axis 163, for example at least one opening opening receiving the axis 163, preferably several openings which are preferably arranged so that the pin 163 is disposed in the upper part of the housing 20.

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Preferably, the housing comprises or consists of a longitudinal reinforcement 28, disposed behind the housing 20 and engaging the edges 21 and 22 and the spacers 25 and 26, if they are present, and possibly also one, preferably two longitudinal axes 29, 30, arranged substantially parallel to axis 163, and engaging through holes made in edges 21 and 22 and spacers 25 and 26. The axis or axes 29 and 30 are preferably arranged offset one relative to the other, and advantageously in front of the housing, and slightly in the low position, in order to advantageously stiffen the housing 20.

Preferably, the components of the housing 20 have all adequate dimensions and are made of all suitable materials. Preferably, these are metallic elements.

For example, the lifting table 1 for veterinary use has a thickness, namely a distance from the ground to the top of the tray, in the low position, of about 10 cm and in the high position of about 140 cm. . This type of table weighs approximately 80 kg and supports a maximum load of approximately 100 kg. The time required to go from its low position to its high position, and vice versa, is between 25 seconds and 30 seconds. The tray has a length of about 140 cm, for a width of about 60 cm and a thickness of about 10 cm. This tray is preferably made of stainless steel or a plastic material such as polyethylene or polypropylene and its upper surface is slightly hollowed out, sloping, for example about 1 cm per meter, to facilitate the evacuation of fluids to a discharge hole of about 2.5 cm in diameter, provided with a discharge neck, or to a transverse slot of about 1 cm wide, comprising a flange. The tray further comprises three rails, or slides, surrounding the lifting table 1, for fixing accessories. The fourth side, the rear of the lifting table 1 includes two lock-shaped holes for attaching an extension and / or a fluid collection tank, the latter can adopt a form of grating. The lifting arms 131, 132, 141 and 142 are tubular elements made of stainless steel or aluminum. They are set in motion using an electric jack, which is controlled by a control, a fixed pedal on the ground or a push button. The cylinder is for example a model SMPS30 from the company LINAK ^® . Its motor has a thickness of around 107 mm, and develops a growth of

BPMANS0001EP00 15

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8000 N. The piston has a stroke of about 260 mm and the cylinder has a closed length of about 175 mm.

Claims (15)

1. Lift table (1) which can pass from a folded position to an unfolded position, and vice versa, comprising - a sub-frame (2) comprising two first sections (6 and 7) arranged parallel to one another, and connected to each other by at least one transverse element (8), - a frame (3) intended to support a plate and comprising two second sections (9, 10) arranged parallel to each other and relative to the first sections (6, 7) of said sub-frame (2), - Means (4) for vertical displacement of said chassis (3) relative to said sub-chassis (2) comprising two series (13, 14) of lifting arms (131, 132, 141 and 142) linked one to the other pivotally with respect to an axis A-A 'and comprising an end movable in translation on or in said first profiles (6, 7) or under or in said second profiles (9, 10), and one end pivotally mounted by report to said subframe (2) or to said chassis (3), - Means (5) for driving said displacement means (4) comprising one end pivotally fixed to said transverse element (8) and another end comprising first support means (16) which take support and move on first means (171 and 172) of pushing the support means (16) said pushing means (171 and 172) being pivotally mounted along said axis A-A 'and being linked, by means of a crosspiece (173 ), to an upper part of the lifting arms (131 and 141) which are movable in translation under or in said second sections (9, 10). 2. The lifting table (1) according to claim 1, in which the first support means (16) comprise two rollers (161 and 162) arranged at the end of an axis (163), said axis (163) being oriented perpendicular to the axis of the drive means (5) and the displacement means (4). 3. The lifting table (1) according to any one of claims 1 or 2, wherein the first means (171 and 172) of pushing the first support means (16), comprise a first portion having a surface with a BE2018 / 5799 convex curvature (174), on which the first support means (16) move and a second portion, adjacent to the first portion, which is longitudinal and at the end of which the crosspiece engages (173 ). 4. The lifting table (1) according to claim 3, wherein the convex curvature (174) of the first pushing means (171 and 172) has a convexity directed towards the frame (3), when said lifting table (1) is folded and a convexity directed substantially towards the front of said lifting table (1), when said lifting table (1) is unfolded. 5. The lifting table (1) according to any one of the preceding claims, further comprising second support means (18) pivotally mounted along said axis A-A 'and being linked, via a cross member (193), at the upper part of the lifting arms (132 and 142) movable in translation on or in the first sections (6, 7) of the subframe (2). 6. The lifting table (1) according to claim 5, in which the second support means (18) comprise two rollers (181 and 182) disposed on the axis (163) carrying the first support means (16) . 7. The lifting table (1) according to claim 5 or claim 6, comprising second means for pushing second support means (18) which are cams (191 and 192), a first portion of which comprises a surface having a convex curvature (194) on which the second support means (18) move. 8. The lifting table (1) according to claim 7, in which the convex curvature (194) of the cams (191 and 192) has a convexity directed towards the sub-frame (2), when said lifting table (1) is folded, and has a convexity directed substantially towards the front of said lifting table (1), when it is unfolded. 9. The lifting table (1) according to any one of the preceding claims, in which the axis (163) is fixed to the drive means (5) by means of a housing (20) of shaped section. of "U", comprising two vertical edges (21, 22) between which are placed spacers (25, 26) arranged parallel to said vertical edges (21 and 22), and possibly also a longitudinal reinforcement (28) and / or two axes (29 and 30) longitudinal arranged substantially in a position parallel to said axis (163). BE2018 / 5799 10. The lifting table (1) according to any one of the preceding claims in which the means (5) for driving the means (4) for movement, comprise an electric actuator. 11. The lifting table (1) according to any one of the preceding claims, 5 further comprising a plate disposed on the frame (3). 12. The lifting table (1) according to any one of the preceding claims, in which the profiles (9 and 10) of the chassis (3) and / or the plate comprise means for fixing an extension of said plate. 13. The lifting table (1) according to any one of the preceding claims, 10 the profiles (9 and 10) of the frame (3) and / or the tray comprise means for attaching accessories. 14. The lifting table (1) according to any one of the preceding claims, comprising at least a second transverse element connecting the first sections (6, 7) of the subframe (2) and capable of serving as a support for an electric transformer . 15. Use of the lifting table (1) according to any one of the preceding claims for veterinary use.