Deployable skate for work platform at height

Abstract

Height access device comprising a front base, a rear base and a floor, the front base defining a climbing plane comprising at least one step extending in a space delimited by two side members, the front base comprising two ground support feet, each foot being provided with a stabilizer (40, 41) movable in rotation between a storage position and a substantially horizontal deployed ground support position, each stabilizer comprising a fixed part (50) and a movable part (51), the fixed part being mounted on a foot of the front base, the movable part being mounted in rotation relative to the fixed part about an axis (54), outside the space delimited by the side members of the front base, between a deployed position and a folded position, the front base comprising wheels mounted on elastic means,the stabilizers of the front base being at a distance from the ground and the wheels being supported on the ground as long as a user does not climb onto the ascent plane, locking means (52) being capable of maintaining the mobile part of each stabilizer in the deployed position. Figure 2,

Description

Title of the invention: Deployable skate for a working platform at height

[0001] The invention relates to height access devices, in particular of the platform type.

[0002] The term "platform" here refers in particular to mobile ladders with a platform, and more precisely to mobile ladders with a work platform with a maximum surface area of ​​1 m2 and a maximum height of 5 m, designed to be used by a single person at a time. Such platforms are presented in standard NF EN 131-7.

[0003] The invention relates in particular to individual rolling platforms (PIR) or light individual rolling platforms (PIRL).

[0004] A rolling individual platform is conventionally a secure workstation conforming to standard NF P 93-352. A rolling individual platform is then a platform used for work at height, which can be carried and / or handled by crane in construction work by a single operator, working on a floor at a maximum height of 2.5 m above the ground. PIRs have a means of movement, a means of immobilization and a means of access to the workstation. Portable PIRs have a mass of less than 50 kg and can be folded without dissociating their elements. PIRs are equipped with two wheels to allow their handling in the closed position. PIRs have a floor protected on three sides by means of protection against falls from a height. These means of protection against falls include a plinth, extending on three sides of the floor.When the user is at the workstation, the fall protection means include a rail extending to the height of the user's torso, and a sub-rail extending to the height of the user's legs. A mobile closure of access to the workstation is provided. The presence of the operator on the platform must not be an obstacle to the closure of access to the workstation. When the workstation opens outwards, standard NF P 93-352 stipulates that a locking system for the mobile closure is mandatory.

[0005] Document FR2914683 shows an example of PIR.

[0006] A lightweight rolling individual platform is conventionally a secure workstation that complies with standard NF P 93-353. A lightweight rolling individual platform is then a platform used for work at height, which can be carried and / or handled by crane in construction work by a single operator, working on a floor at a maximum height of 1.5 m above the ground. PIRLs have a means of movement, a means of immobilization and a means of access to the workstation. PIRLs have a mass of less than 50 kg and can be folded without separating their elements. PIRLs are equipped with wheels to allow them to be handled in the closed position. PIRLs have a floor protected on three sides by means of protection against falls from a height. These means of protection against falls include a toeboard, extending on three sides of the floor. When the user is at the workstation, the means of protection against falls include a rail extending to the height of the user's torso, and a sub-rail extending to the height of the user's legs. A mobile closure of access to the workstation is provided. The presence of the operator on the platform must not be an obstacle to the closure of access to the workstation.When the workstation opens outwards, standard NF P 93-353 stipulates that a mobile closure locking system is mandatory.

[0007] Document FR3023571 shows an example of PIRL.

[0008] Telescopic stabilizers are known, extending transversely relative to the ascent plane, between a retracted position for transporting the platform, and a deployed position for supporting the ground. An example is given in document FR2764320.

[0009] Such a design has disadvantages. In particular, the extension of the stabilizers requires manual operation. Locking in the extended position also requires manual operation, most often the actuation of a lever.

[0010] Stabilizers forming crutches are known, placed fixedly on each of the two side members of the ascent plane. Such a design increases the bulk of the step or platform, which can hinder or even make it impossible to put it in place or pass through a corridor or doorway.

[0011] Telescopic legs are known with respect to the side members of the ascent plane, the legs being provided, in the lower part, with a projection which extends transversely with respect to the ascent plane. An example is given in document FR2850703.

[0012] Such a design has drawbacks. Firstly, the transversely projecting part for the feet increases the size of the step or platform, which can hinder or even make it impossible to install it in a corridor or door frame.

[0013] Document FR3121166 describes a height access device comprising a front base, a rear base and a floor, the front base comprising two ground support feet, each foot being provided with a stabilizer movable in rotation between a storage position and a substantially horizontal deployed position for ground support, the angle defined between the storage position and the deployed position of each stabilizer of the front base being at least 180°.

[0014] The structure described in document FR3121166 has several drawbacks.

[0015] Firstly, to place the stabilizer in its deployed position, the user must lift the platform base, rotate the stabilizer, with his foot, more than 180°, and then replace the base. The sequence of these three steps is mandatory, and requires good coordination of arm and foot movements. These maneuvers are tedious and tiring, especially since they must be carried out on each base.

[0016] Secondly, the stabilizers are held in the deployed and folded positions by elastic washers. The effectiveness of these means is unsatisfactory and decreases over time, particularly due to wear due to friction.

[0017] Third, in the folded position, the stabilizers extend vertically between the two side members of the climbing plane. The stabilizers thus obstruct the passage when the user climbs the climbing plane.

[0018] Fourthly, whether the stabilizers are in the deployed or folded position, the platform rests on the ground by its four feet, each provided with a non-slip pad. Moving the platform is therefore tiring and restrictive, as the user must face the ascent plane. To move the platform, it is in fact necessary to lift the front base, to put two rear wheels in contact with the ground.

[0019] The invention aims in particular to overcome the drawbacks of the prior art, by proposing a new stabilization structure adapted to platforms, in particular PIR or PIRL, or to platforms used for placing products on shelves.

[0020] For these purposes, the invention relates, according to a first aspect, to a height access device comprising a front base, a rear base and a floor, the front base defining a climbing plane comprising at least one step extending in a space delimited by two side members, the front base comprising two ground support feet, each foot being provided with a stabilizer movable in rotation between a storage position and a substantially horizontal deployed position for support on the ground, each stabilizer comprising a fixed part and a movable part, the fixed part being mounted on a foot of the front base, the movable part being mounted in rotation relative to the fixed part about an axis, outside the space delimited by the side members of the front base, between a deployed position and a folded position, the front base comprising wheels mounted on elastic means,the stabilizers of the front base being at a distance from the ground and the wheels being supported on the ground as long as a user does not climb onto the ascent plane, locking means being capable of maintaining the mobile part of each stabilizer in the deployed position.

[0021] The stabilizers are thus mobile in a space separate from the internal space delimited by the side members of the climb plane. The stabilizers, in the deployed position or in the folded position of the mobile part, thus do not cause any discomfort for the feet of a user wanting to climb or descend the front base.

[0022] The stabilizers do not hinder the movement of the front base, the stabilizers being at a distance from the ground and the device being supported on the ground by wheels, as long as a user is not on the ascent plane. It is thus possible for a user to control the rotation of the mobile part of the stabilizers, advantageously with the foot, without having to lift the front base.

[0023] Advantageously, when the stabilizers of the climbing plane are in the deployed position, the locking means of each stabilizer comprise a section extending between the mobile part and the fixed part, the weight of a user climbing onto the climbing plane causing the stabilizers of the climbing plane to press against the ground and a tightening of the locking means. After deployment, an unexpected retraction of the stabilizers is thus excluded, as soon as a user climbs onto the climbing plane.

[0024] Advantageously, the fixed part of each stabilizer of the ascent plane is mounted outside the space delimited by the side members of the front base. The stabilizers thus do not cause any hindrance to the feet of a user wishing to climb or descend the ascent plane.

[0025] Advantageously, for each stabilizer of the climb plane, the locking means are mounted to be able to rotate on the fixed part, between a position for holding the mobile part of the stabilizer in the deployed position and a position for releasing the mobile part of the stabilizer. A return means is capable of causing the movement of the mobile part, from its deployed position to its folded position, when the locking means are in the released position. The return to the folded, compact position of the stabilizers is thus obtained without user intervention.

[0026] Advantageously, the movement of the locking means from their holding position to their release position is carried out against a return means. The risks of accidental actuation of the locking means are thus reduced.

[0027] In certain implementations, the return means of the locking means is an elastic blade, preferably made of spring steel.

[0028] In some implementations, the return means of the movable part comprises a torsion spring, mounted on the rotation axis of the movable part.

[0029] In certain embodiments, the rear base forms a stand comprising at least one crosspiece extending in a space delimited by two side members, the rear base comprising two ground support feet, each foot being provided with a stabilizer movable in rotation between a storage position and a substantially horizontal deployed ground support position, each stabilizer comprising a fixed part and a movable part, the fixed part being mounted on a foot of the rear base, the movable part being mounted in rotation relative to the part fixed around an axis, outside the space delimited by the side members of the rear base, between a deployed position and a folded position, the rear base comprising wheels mounted on elastic means, the stabilizers of the rear base being at a distance from the ground and the wheels being supported on the ground as long as a user does not climb onto the ascent plane, locking means being capable of maintaining the mobile part of each stabilizer of the rear base in the deployed position.

[0030] The stabilizers of the rear plane thus do not hinder the movement of the rear base, the stabilizers being at a distance from the ground and the device being supported on the ground by wheels, as long as a user is not on the ascent plane. It is thus possible for a user to control the rotation of the mobile part of the stabilizers, advantageously with the foot, without having to lift the rear base.

[0031] Advantageously, when the stabilizers of the rear base are in the deployed position, the locking means of each stabilizer comprise a section extending between the mobile part and the fixed part, the weight of a user climbing onto the ascent plane causing the stabilizers of the rear base to press against the ground and tightening of the locking means. After deployment, an unexpected folding of the stabilizers is thus excluded, as soon as a user climbs onto the ascent plane.

[0032] Advantageously, the fixed part of each stabilizer of the rear base is mounted outside the space delimited by the side members of the rear base.

[0033] Advantageously, for each stabilizer of the rear base, the locking means are mounted to be able to rotate on the fixed part, between a position for holding the mobile part of the stabilizer in the deployed position and a position for releasing the mobile part of the stabilizer. A return means is capable of causing the movement of the mobile part, from its deployed position to its folded position, when the locking means are in the released position. The return to the folded, compact position of the stabilizers is thus obtained without user intervention.

[0034] In certain implementations, the movement of the locking means from their holding position to their release position is carried out against a return means. The risks of accidental actuation of the locking means are thus reduced.

[0035] In certain embodiments, the return means of the locking means is an elastic blade, preferably made of spring steel.

[0036] In certain embodiments, the return means of the movable part comprises a torsion spring, mounted on the rotation axis of the movable part.

[0037] Advantageously, the device comprises a guardrail mounted on the front plane, this guardrail comprising a pair of side barriers, each mounted articulated on a side member between a deployed position in which each barrier extends sens- possibly perpendicular to the front plane, and a folded position.

[0038] According to another aspect, there is provided a device as presented above, the device being of the PIR individual rolling platform type, or lightweight individual rolling platform.

[0039] Other objects and advantages of the invention will appear in the light of the description of embodiments, given below with reference to the appended drawings in which:

[0040] [Fig.l] is a perspective view of a platform, according to one embodiment, the ascent plane being placed towards the front;

[0041] [Fig.2] is a perspective view of a stabilizer, in the deployed position;

[0042] [Fig.3] is a perspective view of the stabilizer shown in [Fig.2], in position folded;

[0043] [Fig.4] is a perspective view of the stabilizer shown in [Fig.2], in position deployed, the stabilizer being mounted on a spar foot of a base.

[0044] In the remainder of this description, the terms “horizontal”, “vertical”, “up”, “down”, are used in reference to the platform in the deployed position, resting on the ground, as shown in [Fig.l], and the terms “left” “right” are used in reference to a person placed in front of the platform, and looking at the ascent plane.

[0045] We first refer to [Fig.l] which represents a platform 1, according to one embodiment, the platform 1 being represented in perspective.

[0046] Platform 1 comprises two bases.

[0047] In the embodiment shown, the platform has easy access, a first base 2 forming a climbing surface, the second base 3 forming a stand.

[0048] In other embodiments, not shown, the platform has dual access, and comprises two legs each forming a climbing plane.

[0049] In the embodiment shown in [Fig.l], the climbing plane comprises two side members 4, 5 and rungs forming steps 6, 7. The steps 6, 7 advantageously comprise a non-slip support surface, this surface being for example embossed, ribbed, perforated. According to various embodiments, the steps 6, 7 comprise an element in the form of a grid, a grating, expanded metal or perforated metal. The steps 6, 7 may be made of metal, in particular aluminum alloy or steel, or composite material.

[0050] In the embodiment shown, the second base 3 comprises two side members 8, 9 and two crosspieces 10. The crosspieces 10 are in the form of a substantially horizontal bar.

[0051] In the embodiment shown, the ascent plan comprises three steps and the platform is for example intended for placing products on shelves, in particular in large-scale distribution (large food stores, large supermarkets DIY).

[0052] In other embodiments, not shown, the climbing plane comprises one step, two steps or more than three steps. The platform comprises, for example, five to seven steps, the maximum working height then being of the order of three to four meters.

[0053] In certain embodiments, the second base comprises a lower crosspiece in the form of a bent or curved tube, forming a U-shape opening towards the ground. This arrangement allows the platform to be used above an obstacle such as, for example, a toilet bowl.

[0054] In the embodiment shown in [Fig. 1], the ascent plane is of fixed height and comprises three steps.

[0055] In certain embodiments, not shown, the lifting plane is of adjustable height, and comprises for example two telescopic assemblies, the second base also being of adjustable height.

[0056] In the embodiment shown in [Fig.l], each of two side members 4, 5 of the ascent plane 2 carries a wheel 15, 16. When a user wishes to move the platform 1, in the deployed position or in the folded position, the wheels 15, 16 are advantageously in contact with the ground. It is thus possible to move the platform 1 manually and without effort.

[0057] In the embodiment shown, each of the two side members 8, 9 of the stand carries a wheel 17, 18, allowing the platform to be moved, in the deployed position for use or in the compact folded position for transport.

[0058] In the embodiment shown, the movement wheels are neither steerable nor load-bearing in the working position of the platform.

[0059] The two legs 1, 2 are mounted articulated to each other, between a compact storage position, in which the two legs are in contact and parallel to each other, and a position of use of the platform, as shown in [Fig.l].

[0060] In certain implementations, the platform comprises a device for locking the side members of the ascent plane, when the platform 1 is in the compact folded position. In one implementation, the locking device comprises deformable tabs forming an elastic hook. When the platform 1 is folded, the side members 4, 5 of the ascent plane 2 move closer to those of the stand 3 and open the elastic hooks. The locking of the side members 4, 5 of the ascent plane 2 is for example obtained by snap-fastening.

[0061] Platform 1 comprises a horizontal floor 19.

[0062] This floor 19 is advantageously non-slip and is for example with an embossed, ribbed, or perforated surface.

[0063] The floor may be made of metal, in particular aluminum alloy or steel, or else of composite material, for example with a polymer matrix and fiberglass reinforcement.

[0064] A plinth delimits the floor 19, this plinth comprising three sections substantially perpendicular to the floor 19, namely two lateral sections 20, 21 and a junction section 22, opposite the rising plane.

[0065] This plinth limits the risk of objects such as tools falling onto the floor. This plinth forms a stop for the user's feet, reducing the risk of falling.

[0066] The height of the plinth is advantageously ten centimeters or more than ten centimeters.

[0067] In one implementation, the floor and the plinth are made in one piece, for example by injection molding. In other implementations, the plinth is fixed to the floor. In certain particular embodiments, the plinth is hinged to the floor between a deployed position for use and a compact folded position for storage or transport of the platform.

[0068] The width of the floor is advantageously forty centimeters, and its length less than one meter. The platform is thus suitable for interior work, and can be moved into openings such as doors, or into building staircases.

[0069] Platform 1 includes a guardrail.

[0070] In the embodiment shown, the guardrail comprises a pair of side barriers, each formed by a folded or curved tube.

[0071] In other embodiments, not shown, one of the side barriers or both side barriers comprise a fabric net or a solid or perforated plate, for example made of expanded metal or perforated metal.

[0072] The tubes forming the side barriers and the profiles forming the bases may in particular be made of aluminum alloy or steel.

[0073] When the platform is intended for electrical work, the tubes forming the side barriers and the profiles forming the legs are advantageously made of insulating material, such as a composite material, for example with a polymer matrix and glass fiber or flax fiber.

[0074] Each side barrier is mounted articulated on a side member 4, 5 between a deployed position, shown in [Fig.l], in which each barrier extends substantially perpendicular to the front plane of ascent, and a folded position.

[0075] Advantageously, in the folded position, each side barrier extends substantially parallel to the ascent plane. The platform is thus compact, for storage or transport.

[0076] Each side barrier is hinged to its support beam by an upper hinge and a lower hinge.

[0077] Advantageously, locking means allow each side barrier to be held in its deployed position, or in its folded position. These means comprise, for example, a safety pin.

[0078] Each side barrier comprises an upper rail section 23, a ramp 24 and a lower rail section 25.

[0079] Advantageously, when the side barriers are in the deployed position, the upper rail section 23 extends, at least in part, substantially horizontally, at the height of the torso of a user whose feet are resting on the floor 19.

[0080] Advantageously, when the side barriers are in the deployed position, the lower rail section 25 extends substantially at the height of the legs of a user whose feet are resting on the floor 19.

[0081] In the embodiment shown, the two barriers are of similar structure and mirror each other with respect to a vertical plane.

[0082] Advantageously, the two lateral barriers are formed by cutting, folding, bending, and assembly, from the same metal tube, for example an aluminum alloy tube with a round section, or from a composite tube, for example from pultrusion.

[0083] The side members 4, 5 of the ascent plane 1 have a length greater than the side members 8, 9 of the stand 2, and the platform 1 carries a shelf 26, fixed at the upper end of the side members 4, 5 of the ascent plane.

[0084] In certain implementations, this tablet 26 is made of polymer material or composite material.

[0085] The functions of the tablet 26 are adaptable to the desired uses for the platform 1, the tablet being able to serve as a tool holder, and / or as a support for a flexible or rigid tool box, and / or as a support for a container, for example a paint pot.

[0086] In the embodiment shown, the tablet 26 forms a smooth bearing surface. In other implementations, not shown, the tablet comprises one or more grooves or housings, for example for tools.

[0087] Depending in particular on the loads in service, the fixing of the shelf 26 on the side members 4, 5 of the ascent plane can be carried out by force mounting, or by screwing or riveting.

[0088] The two side members 4, 5 of the ascent plane 2 delimit a circulation space for the user's body, during his ascent and descent from the platform 1.

[0089] A work space is delimited laterally by the upper sections of the side members 4, 5 of the ascent plane, and the upper sections of the side members 8, 9 of the rear stand.

[0090] This work space is secured, in particular with regard to the risks of falling, at different heights of the body of a user whose feet are resting on the floor 19.

[0091] A first safety feature, at the height of the user's feet, is provided by the three sections 20-22 of the plinth.

[0092] A second safety feature, at the height of the user's legs, is provided by the lower sections 25 of the side barriers, and by a strip or strap 28, forming the lower rail of the guardrail.

[0093] A third safety feature, at the height of the user's torso, is provided by the upper sections 23 and by an upper bar 29 mounted hinged to a side barrier.

[0094] In the embodiment shown, the upper bar 29 is mounted in an articulated pivoting manner to the side barrier arranged to the left of the ascent plane.

[0095] It is understood that the upper bar 29 could be mounted pivotally to the side barrier arranged to the right of the ascent plane.

[0096] Advantageously, the upper bar 29 is rigid, and is for example made of steel, aluminum alloy or composite material.

[0097] The lower 23 and upper 24 sections of the side barriers provide safety to the user against lateral tilting of the platform.

[0098] Safety with respect to the forward tilting of the platform 1 is ensured by the presence of the tablet 26 at the height of the user's torso, and by the presence of a crosspiece 30 connecting the side members 8, 9 of the stand, at the height of the user's legs.

[0099] Advantageously, a crosspiece is arranged under the shelf 26, this crosspiece being assembled to the side members 4, 5, this crosspiece being able to serve as a support for the shelf 26 and reinforcing the safety with regard to the forward tilting of the platform.

[0100] Safety with respect to the platform 1 tipping backwards is ensured by the presence of the upper bar 29, at the rear of the workstation, at the height of the user's torso, and by the presence of the lower band or strap 28, at the height of the user's legs.

[0101] Complete 360° security of the workspace is thus provided to the user of the platform.

[0102] Advantageously, the platform is provided with means preventing the workstation from accidentally opening outwards, for example when the user present in the workspace leans on the upper bar 29 or on the lower strip 28.

[0103] In the embodiment shown in [Fig. 1], no organ of the platform projects above the upper sections 23 of the guardrail. The user present in the space The worker thus benefits from 360° safety, with no part of the platform obstructing their view or arm movements.

[0104] Advantageously, the surface of the floor 19 is included in the support polygon of the platform 1. These arrangements greatly reduce the risks of the platform tipping over during its use.

[0105] The bar 29 forms the upper smooth part for the guardrail.

[0106] Advantageously, the manual opening of the guardrail, by pivoting the bar 29, is only possible when a vertical manual force is applied to the bar 29, from bottom to top.

[0107] In some implementations, this force is exerted against a return means.

[0108] The orientation of such an effort excludes it from occurring involuntarily. The stiffness of the possible return means is advantageously relatively high, eliminating any risk of accidental opening of the gate.

[0109] Advantageously, the upward pivoting travel of the bar 29 is limited to less than 30°, and even more advantageously to less than 20°, relative to the horizontal position of the bar 29, this horizontal position being that of closing the workstation.

[0110] This limited upward travel of the bar 29 does not allow the user of the platform 1 to leave the workstation, and is only used to unhook the bar 29 from its support.

[0111] When the bar 29 has been unhooked from its support, a manual pivoting movement of the bar is possible, by pivoting downwards, in a clockwise direction, for an observer placed opposite the ascent plane.

[0112] When the user wishes to leave the workstation at height, the bar 29 must be manually maneuvered in a clockwise direction.

[0113] This downward pivoting movement, in a clockwise direction, is advantageously carried out to a storage position, in which the bar 29 is substantially vertical.

[0114] This maneuver is facilitated by the weight of the bar 29.

[0115] In some implementations, this clockwise pivoting movement is performed against a return means, for example a torsion spring. These arrangements make it possible to avoid a sudden movement of the bar 29.

[0116] Advantageously, the pivoting of the bar 29 around its axis does not take place along a vertical plane, and includes a horizontal component.

[0117] The presence of this horizontal component reduces the risks of accidental unhooking of the bar: the user must exert a horizontal force, then a horizontal force vertically upwards, then move the bar downwards to bring the bar from its deployed horizontal position to its vertical storage position.

[0118] The strap or band 28 is provided with means for fixing on the two side barriers. Advantageously, the strap 28 is permanently fixed to one of the side barriers, for example the left side barrier, and the strap 28 is provided with means for mounting and dismounting on the second side barrier.

[0119] In some embodiments, the strap 28 is slightly elastically deformable. In other implementations, the strap 28 has a high stiffness and is slightly elastically deformable.

[0120] The strap is for example made of coated fabric, or of polymer material such as polyester or aramid, or even of leather.

[0121] In the embodiment shown in [Fig.l], the platform 1 comprises a lower shelf 27, at the height of the legs of a user whose feet are on the floor 19. This shelf 27 can, for example, serve as a support for a bucket such as a paint pot.

[0122] The platform advantageously comprises stabilizers, on the climbing plane and / or on the second base.

[0123] In the embodiment shown in [Fig.l], the platform 1 comprises two stabilizers 40, 41 on the ascent plane 2, and two stabilizers 42, 43 on the second base 3, the stabilizers 40-43 being advantageously foldable.

[0124] In the embodiment shown, the two stabilizers 40, 41 fixed on the lifting plane 2 are substantially identical to the two stabilizers 42, 43 fixed on the second base 3.

[0125] In other embodiments, not shown, the stabilizers fixed on the climbing plane define a ground support surface of different extent from that defined by the stabilizers fixed on the second base.

[0126] In the remainder of this description, the structure of a stabilizer 40-43 will be detailed with reference to FIGS. 2 to 4.

[0127] When a user is facing the ascent plane, the right-hand spar of the ascent plane carries a stabilizer whose unfolding movement is obtained by a rotation in a clockwise direction. The left-hand spar of the ascent plane carries a stabilizer whose unfolding movement is obtained by a rotation in a counterclockwise direction.

[0128] The side members 4, 5 delimiting a space inside the ascent plane, the unfolding of the stabilizers 40, 41 is obtained in a space outside the ascent plane.

[0129] Conversely, the folding movement of the stabilizer carried by the right spar of the climb plane is obtained by a counterclockwise rotation. The folding movement of the stabilizer carried by the left spar of the climb plane is obtained by a clockwise rotation.

[0130] The folding of the stabilizers 40, 41 of the climb plane is obtained in a space outside the climb plane.

[0131] What has just been said for the stabilizers 40, 41 of the ascent plane 2 also applies advantageously to the stabilizers 42, 43 fixed on the second base 3.

[0132] The unfolding allows the extension of a stabilizer 40-43, its deployment, its opening, its spreading, the unfolded stabilizer being arranged opposite a larger surface of the ground than in the folded, folded state of the stabilizer.

[0133] The stabilizer is thus mobile between a compact position, for storing or transporting the platform, and an extended position for using the platform.

[0134] In the compact position of the stabilizers, the platform has a reduced footprint.

[0135] Advantageously, the width of the climbing plane and the second base is less than 750 mm, preferably less than 700 mm, and even more advantageously less than 630 mm, when the stabilizers are in the folded position. The platform is thus able to pass through the openings of interior residential doors.

[0136] In the extended position of the stabilizers, the platform has great stability.

[0137] Advantageously, the width of the rising plane and of the second base is greater than 850 mm, even more advantageously greater than 890 mm, when the stabilizers are in the deployed position. The platform thus has great resistance to tipping.

[0138] In the embodiment shown, each stabilizer 40-43 comprises a first part, called fixed part 50, a second part, called mobile part 51, a locking means 52 and at least one return means 53.

[0139] The fixed part 50 is provided with means for mounting the stabilizer 40-43 on a spar 4, 5 of the climbing plane 2 or a spar 6, 7 of the second base 3.

[0140] The mobile part 51 is mounted movably on the fixed part 50, between a deployed position and a compact position of the stabilizer 40-43.

[0141] In the embodiment shown, the mobile part 51 is mounted to be able to rotate about a substantially horizontal axis 54, over a travel of the order of 130°. The rotation axis 54 is arranged at a low height relative to the ground.

[0142] The locking means 52 is capable of maintaining the mobile part 51 in the deployed position, as long as the user does not request the folding of the stabilizer 40-43.

[0143] In the embodiment shown, the locking means 52 is mounted to move in rotation, on the fixed part 50, around a substantially horizontal axis 55, over a travel of a few degrees.

[0144] The locking means 52 is movable between a holding position and a release position, against a return means, such as a spring steel blade 80.

[0145] In the embodiment shown, in the holding position seen in [Fig.2] and 3, a section of the locking means 52 is inserted between the fixed part 50 and the movable part 51 and blocks the rotation of the movable part 51. The stabilizer 40-43 is thus maintained in its deployed state.

[0146] In the embodiment shown, in the release position of the locking means 52, shown in [Fig.4], the movable part 51 is free to pivot around the axis 54 relative to the fixed part 50, in a clockwise direction or in an anticlockwise direction.

[0147] The return means 53 is capable of automatically causing the movement of the mobile part 51, from its deployed position to its compact position, when the user requests the folding of the stabilizer 40-43.

[0148] In the embodiment shown, the return means 53 is a torsion spring, the turns of which are mounted on the rotation axis 54 of the movable part 51. One end of the torsion spring bears on the movable part 51.

[0149] In certain implementations, the other end of the torsion spring bears on the locking means 52.

[0150] In the embodiment shown, when the stabilizer 40-43 is in the deployed position, the stabilizer is retracted by pressure on the locking means 52 and vertical pressure, downwards, on the movable part 51 of the stabilizer.

[0151] Advantageously, the platform 1 comprises wheels 15-18 mounted on elastic means, such as compression springs. Thus, as long as the user does not climb the ascent plane, the stabilizers 40, 41 of the ascent plane are placed at a distance from the ground, the wheels 15, 16 being supported on the ground. Similarly, as long as the user does not exert force on the crosspieces of the second base 3, the stabilizers 42-43 of the second base 3 are placed at a distance from the ground, the wheels 17-18 being supported on the ground.

[0152] As an indication, the stabilizers are then at a distance of a few millimeters from the ground, for example of the order of 20 mm, in particular 18 mm.

[0153] It is thus possible to easily move the platform. A user can control the deployment of the stabilizers, without having to lift the front base or the rear base.

[0154] Conversely, when a user climbs onto or descends from the ascent plane, or when a user has his feet on the floor 19 for working at height, the elastic means of the wheel supports 15-18 are compressed and the platform 1 is supported on the ground, by the stabilizers 40-43.

[0155] Advantageously, each of the stabilizers 40-43 carries non-slip pads 60-62, for example made of elastomer.

[0156] The lower surface of the pads 60-62 is advantageously provided with reliefs.

[0157] In the embodiment shown, two anti-slip pads 60-61 are assembled on the fixed part 50 and one anti-slip pad 62 is assembled on the movable part 51 of each stabilizer 40-43.

[0158] The pads 60, 61 advantageously protrude from a single piece, mounted on the fixed part 50.

[0159] The fixing of the pads 60-62 is for example obtained by screwing.

[0160] In other embodiments, the fixing of the pads 60-62 is obtained by force fitting.

[0161] When a user steps onto the platform 1 in the deployed position as shown in [Fig.l], the platform 1 rests on the ground on the non-slip pads 60-62.

[0162] In a first configuration, the stabilizers 40-43 are folded, and the platform 1 rests on the pads 60-61 of the fixed part 50 of each stabilizer 40-44. The support polygon of the platform, defined by the pads 60, 61 of the stabilizers 40-43, thus has an optimized surface.

[0163] Advantageously, in a reinforced safety configuration, the stabilizers 40-43 are deployed, and the platform 1 rests on the pads 60-61 of the fixed part 50 and on the pads 62 of the mobile part 51 of each stabilizer 40-43.

[0164] The user can deploy all four stabilizers 40-43, or only certain stabilizers, depending on the needs and / or the space available.

[0165] When the user has descended from the platform 1, the skates 60-62 are advantageously at a distance from the ground, and the user can control the pivoting of the mobile part 51, by pressing on the locking means 52 and vertical pressure on the mobile part 51, against the return means 53. Releasing the pressure on the mobile part 51, the user then lets the mobile part 51 automatically come to bear against the fixed part 50, by a rotation movement of approximately 130°, in the embodiment shown.

[0166] In the folded position, the movable part 51 of the stabilizer 40-43 bears against the locking means 52, this support being maintained by a return means. The pad 62 carried by the movable part 51 is oriented upwards.

[0167] To deploy the stabilizer 40-43, the user advantageously uses his foot, and pivots the mobile part 51 to the deployed state shown in [Fig.2].

[0168] The fixing of the stabilizer 40-43 on a spar 4, 5 of the ascent plane or a spar 8, 9 of the stand is for example obtained by screwing.

[0169] In certain embodiments, the fixed part 50 of the stabilizer 40-43 is provided with a lateral groove of a shape complementary to that of the base of the spar 4, 5; 8, 9 on which the stabilizer 40-43 is fixed. The fixed part 50 is made of metal alloy, for example steel or aluminum alloy, or polymer material or composite material.

[0170] In the embodiment shown, the fixed part 50 is provided with tabs on which holes 70, 71 are provided for passage of members for fixing to the side members, for example screws.

[0171] The invention has numerous advantages.

[0172] The stabilizers 40-44 advantageously extend outwards from the side members 4, 5, and thus do not form an obstacle for the user's feet when climbing to the workstation.

[0173] The unfolding movement of the stabilizers can be carried out using the foot, the user not having to bend down.

[0174] The folding movement of the stabilizers can be controlled using the foot, and the user does not have to bend down.

[0175] The return of the stabilizers to the folded position, after user command, is automatic, without user intervention.

[0176] Once the stabilizer is deployed, when the user climbs onto the ascent plane, the pads 60-62 come into contact with the ground and the user's weight generates a substantially vertical reaction force on the pad 62 of the mobile part 51. This reaction force advantageously causes the locking means 52 to tighten between the mobile part 51 and the fixed part 50. The locking means 52 is thus firmly held, preventing any release of the mobile part 51 and excluding any folding of the mobile part 51. The stabilizer 40-44 cannot fold when the user climbs onto the platform or is in the work station at height secured by the platform.

[0177] The platform has a reduced footprint, both in the deployed position for use and in the folded position for storage or transport.

[0178] In the folded position, the side barriers are arranged substantially parallel to the ascent plane, in a compact position for storing or transporting the platform.

[0179] The invention finds application for steps or platforms, in particular individual rolling platforms or lightweight individual rolling platforms.

Claims

Claims

1. Height access device comprising a front base (2), a rear base (3) and a floor (19), the front base (2) defining a climbing plane comprising at least one step (6, 7) extending in a space delimited by two side members (4, 5), the front base (2) comprising two ground support feet, each foot being provided with a stabilizer (40, 41) movable in rotation between a storage position and a substantially horizontal deployed ground support position, each stabilizer (40, 41) comprising a fixed part (50) and a movable part (51), the fixed part (50) being mounted on a foot of the front base (2), the movable part (51) being mounted in rotation relative to the fixed part (50) around an axis (54), outside the space delimited by the side members (4, 5) of the base front (2), between a deployed position and a folded position, the device being characterized in that the front base (2) comprises wheels (15,16) mounted on elastic means, the stabilizers (40, 41) of the front base being at a distance from the ground and the wheels (15, 16) being supported on the ground as long as a user does not climb onto the ascent plane, locking means (52) being capable of maintaining the mobile part (51) of each stabilizer (40, 41) in the deployed position.,

2. Device according to claim 1, characterized in that, when the stabilizers (40, 41) of the climbing plane (2) are in the deployed position, the locking means (52) of each stabilizer (40, 41) comprise a section extending between the movable part (51) and the fixed part (50), the weight of a user climbing onto the climbing plane (2) causing the stabilizers (40, 41) of the climbing plane (2) to press against the ground and a tightening of the locking means (52).

3. Device according to claim 1 or 2, characterized in that the fixed part (50) of each stabilizer (40, 41) of the ascent plane (2) is mounted outside the space delimited by the side members (4, 5) of the front base (2).

4. Device according to any one of claims 1 to 3, characterized in that for each stabilizer (40, 41) of the ascent plane (2), the locking means (52) are mounted to be able to rotate on the fixed part (51), between a position for holding the mobile part (51) of the stabilizer (40, 41) in the deployed position and a position for releasing the mobile part (51) of the stabilizer (40, 41).

5. Device according to claim 4, characterized in that a return means is capable of causing the movement of the movable part (51), from its deployed position to its folded position, when the locking means (52) are in the release position.

6. Device according to claim 4 or 5, characterized in that movement of the locking means (52) from their holding position to their release position is carried out against a return means.

7. Device according to claim 6, characterized in that the return means of the locking means is an elastic blade (80), preferably made of spring steel.

8. Device according to any one of claims 5 to 7, characterized in that the return means of the movable part comprises a torsion spring, mounted on the axis (54) of rotation of the movable part (51).

9. Device according to any one of claims 1 to 8, characterized in that the rear base (3) forms a stand comprising at least one crosspiece (10) extending in a space delimited by two side members (8, 9), the rear base (3) comprising two ground support feet, each foot being provided with a stabilizer (42, 43) movable in rotation between a storage position and a substantially horizontal deployed position for support on the ground, each stabilizer (42, 43) comprising a fixed part (50) and a movable part (51), the fixed part (50) being mounted on a foot of the rear base (3), the movable part (51) being mounted in rotation relative to the fixed part (50) around an axis (54), outside the space delimited by the side members (8, 9) of the rear base (3), between a deployed position and a folded position, the rear base (3) comprises wheels (17, 18) mounted on elastic means, the stabilizers (42,43) of the rear base (3) being at a distance from the ground and the wheels (17, 18) being supported on the ground as long as a user does not climb onto the ascent plane (2), locking means (52) being capable of maintaining the movable part (51) of each stabilizer (42, 43) of the rear base (3) in the deployed position.,

10. Device according to claim 9, characterized in that, when the stabilizers (42, 43) of the rear base (3) are in the deployed position, the locking means (52) of each stabilizer (42, 43) comprise a section extending between the movable part (51) and the fixed part (50), the weight of a user climbing onto the ascent plane (2) causing the stabilizers (42, 43) of the rear base to rest on the ground. (3) and a tightening of the locking means (52).

11. Device according to claim 9 or 10, characterized in that the fixed part (51) of each stabilizer (42, 43) of the rear base (3) is mounted outside the space delimited by the side members (8, 9) of the rear base (3).

12. Device according to any one of claims 9 to 11, characterized in that for each stabilizer (42, 43) of the rear base (3), the locking means (52) are mounted to be able to rotate on the fixed part (51), between a position for holding the mobile part (51) of the stabilizer (42, 43) in the deployed position and a position for releasing the mobile part (51) of the stabilizer (42, 43).

13. Device according to claim 12, characterized in that a return means is capable of causing the movement of the movable part (51), from its deployed position to its folded position, when the locking means (52) are in the release position.

14. Device according to claim 12 or 13, characterized in that movement of the locking means (52) from their holding position to their release position is carried out against a return means.

15. Device according to claim 14, characterized in that the return means of the locking means (52) is an elastic blade (80), preferably made of spring steel.

16. Device according to any one of claims 13 to 15, characterized in that the return means of the movable part (51) comprises a torsion spring, mounted on the axis of rotation of the movable part.

17. Device according to any one of claims 1 to 16, characterized in that it comprises a guardrail mounted on the front plane (2), this guardrail comprising a pair of lateral barriers, each mounted articulated on a side member (4, 5) between a deployed position in which each barrier extends substantially perpendicular to the front plane (2), and a folded position.

18. 18. Device according to any one of claims 1 to 17, the device being a PIR individual rolling platform, or a lightweight individual rolling platform.

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