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EP4444651B1 - Aerial lift for persons working at height - Google Patents

Aerial lift for persons working at height

Info

Publication number
EP4444651B1
EP4444651B1 EP22835092.2A EP22835092A EP4444651B1 EP 4444651 B1 EP4444651 B1 EP 4444651B1 EP 22835092 A EP22835092 A EP 22835092A EP 4444651 B1 EP4444651 B1 EP 4444651B1
Authority
EP
European Patent Office
Prior art keywords
arm
damping device
working platform
aerial lift
piston
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP22835092.2A
Other languages
German (de)
French (fr)
Other versions
EP4444651A1 (en
EP4444651C0 (en
Inventor
Arnaud Sochas
Guillaume Gabillard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Manitou BF SA
Original Assignee
Manitou BF SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Manitou BF SA filed Critical Manitou BF SA
Publication of EP4444651A1 publication Critical patent/EP4444651A1/en
Application granted granted Critical
Publication of EP4444651B1 publication Critical patent/EP4444651B1/en
Publication of EP4444651C0 publication Critical patent/EP4444651C0/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • B66F11/044—Working platforms suspended from booms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
    • B66F17/006—Safety devices, e.g. for limiting or indicating lifting force for working platforms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • B66F9/24—Electrical devices or systems

Definitions

  • the present invention relates to a lifting platform for working in the elevating of people.
  • Lifting cradles are well known to those skilled in the art, as illustrated, for example, by the request for patent WO2019/158869 or the patent US11007838 , which discloses the preamble of claim 1. Manufacturers of such cradles are constantly seeking to improve the comfort of the operator located in the basket without harming the safety of said operator or the quality of the work carried out.
  • An aim of the invention is therefore to propose a lifting platform whose design allows increased comfort for the operator of the platform without compromising the quality of the work that can be carried out from the platform.
  • Said nacelle therefore has two operating modes depending at least on the angular position of the arm within the angular range defined by the extreme high and low positions of the arm, namely an operating mode in transport configuration automatically activated when the arm is in the extreme low position, and in which the maximum speed of movement of the chassis is greater than the maximum speed of the chassis in operating mode in work configuration and an operating mode in work configuration automatically activated when the arm occupies a position other than the extreme low position and in which the maximum speed of movement of the chassis is lower than the maximum speed of the chassis in operating mode in transport configuration.
  • This design makes it possible to avoid high-speed ground movement of the chassis in the operating mode in work configuration in which the arm occupies a position other than the extreme low position. In work configuration, the arm is potentially in the raised position.
  • the damping device can be activated or deactivated depending on the activated operating mode.
  • the damping device is activated, i.e. in the active state, in the operating mode. operation in transport configuration and deactivatable when switching from the transport configuration operating mode to the work configuration operating mode.
  • the damping device can thus be in the inactive state in the work configuration operating mode. Thanks to the fact that the damping device is activated in the transport configuration operating mode, it is possible for the operator seated in the basket to have driving comfort during the rolling phases which take place essentially in the transport configuration operating mode.
  • This damping device makes it possible to directly or indirectly dampen the oscillating movements of the basket when raising and lowering observed in particular when the chassis is traveling at a high speed on uneven ground.
  • the deactivation of the damping device when switching from the transport configuration operating mode to the work configuration operating mode allows the operator, in the work configuration operating mode, not to be disturbed by a possibility of movement of the basket floor which could impair the precision of the operator's movements.
  • the damping device is in the active state in the operating mode in the transport configuration of the nacelle and the control unit is configured to control the deactivation of the damping device in the activated state of the operating mode in the work configuration of the nacelle.
  • the damping device is in the active state in the operating mode in the transport configuration of the nacelle and the control unit is configured to control the deactivation of the damping device, when the arm is angularly moved away from the extreme low position.
  • the control unit is therefore configured to control the transition from the active state to the inactive state of the damping device, depending on the angular position occupied by the arm between the extreme low and high positions.
  • transition of the nacelle from the operating mode in transport configuration to the operating mode in work configuration is accompanied by a deactivation of the damping device and the transition of the nacelle from the operating mode in work configuration to the operating mode in transport configuration is accompanied by an activation of the damping device.
  • the or at least one of the damping devices comprises at least one hydraulic cylinder, the or at least one of the cylinders comprising a body and a piston, the body and the piston being movable relative to each other, said piston separating said body into two chambers.
  • the two chambers are connected to each other by a fluid circuit equipped with a closure member mounted to move between an open position corresponding to the active state of the damping device and a closed position, corresponding to the inactive state of the damping device, in which any transfer of fluid between said chambers is prevented, each chamber housing at least one elastically deformable member for returning the piston towards the other chamber.
  • the body and the piston of the jack can be arranged on the movement transmission chain between the upper end of the arm and the location for receiving an operator of the basket and can be interposed between two separate parts of the nacelle mounted to move relative to each other, the movement of fluid between said chambers of the jack making it possible to dampen this relative movement of said parts between them.
  • the basket comprises a bottom and side walls surrounding said bottom, the floor extends above said bottom and the or at least one of the damping devices which is an activatable/deactivatable device arranged between the receiving location of an operator of the basket and the upper end of the arm extends between the floor and the bottom of the basket, the floor and the bottom being mounted to move in the direction of moving towards or away from each other in the active state of the damping device.
  • This arrangement makes it possible to dampen the oscillating movements of the floor as close as possible to the floor, particularly when the chassis is moving over uneven ground at high speed, so that the comfort of the operator in the basket is increased.
  • the body of the cylinder of the damping device is coupled to the bottom of the basket and the piston of said cylinder is coupled to the floor or vice versa and the piston and the body are mounted to move relative to each other in the driven state in relative displacement of the floor and the bottom in the direction of moving towards or away from each other in the active state. of the damping device.
  • the inactive state of the damping device any relative movement of the floor and the bottom in the direction of moving towards or away from each other is prevented.
  • the floor and the bottom are mounted fixed in the inactive state of the damping device.
  • the or at least one of the damping devices which is an activatable/deactivatable device arranged between the receiving location of an operator of the basket and the upper end of the arm extends between two basket parts, and said basket parts are mounted to move relative to each other in the active state of the damping device.
  • one of the basket parts is coupled to the upper end of the arm by the articulated connection coupling the upper end of the arm to the basket, this articulated connection comprising at least one pivoting connection with a so-called vertical axis, said axis extending orthogonally to the floor and the body of the cylinder of the damping device is coupled to one of the basket parts and the piston of said cylinder is coupled to the other of the basket parts and the piston and the body are, in the active state of the damping device, mounted to move relative to each other in the driven state in relative displacement of said basket parts.
  • the nacelle being of the type in which the upper end of the arm for driving the basket in movement is coupled to the basket by an articulated connection comprising at least one structure with a parallelogram deformable to the basket, the structure with a deformable parallelogram is connected to the upper end of the arm by a pivot connection with a so-called horizontal pivot axis perpendicular to the longitudinal axis of the arm, and the or at least one of the damping devices which is an activatable/deactivatable device arranged between the location for receiving an operator of the basket and the upper end of the arm extends between the upper end of the arm and the structure with a deformable parallelogram.
  • the or at least one of the damping devices comprising at least one hydraulic cylinder with a body and a piston separating said body into two chambers, the body of the cylinder is coupled to the arm and the piston of said cylinder is coupled to the deformable parallelogram structure or vice versa, the deformable parallelogram structure is mounted movably around the pivot axis of the pivot connection coupling the arm and the deformable parallelogram structure in the driven state in axial displacement of the piston inside the body and the damping device comprises a hydraulic accumulator in fluid communication with one of the chambers of the cylinder by a closable connection open in the active state of the damping device.
  • This design is characterized by its simplicity.
  • This design allows the use of the existing cylinder used as a cylinder for correcting the horizontality of the basket floor as a damping device by associating it with a hydraulic accumulator, this damping device being activated when the closable fluid connection between the accumulator and the cylinder is open. This results in a simplified design of the nacelle.
  • the device for determining a parameter representative of the angular position of the arm comprises at least one inductive sensor for detecting the lowest extreme position of the arm.
  • This inductive sensor can enable the detection of the arm in abutment on the chassis in the lowest extreme position.
  • the elevation of the arm and the resulting absence of contact of the arm with the stop can be detected by the inductive sensor.
  • This detection information can be transmitted to the control unit.
  • the device can comprise an angular sensor for measuring the angular position of the arm relative to one of the extreme positions. These necessary conditions can be supplemented by other conditions, in particular when the arm is a telescopic arm.
  • the lowest extreme position is also defined in this case by a retracted position of the arm.
  • said nacelle comprises a forced activation member of the damping device, this forced activation member being a manually operated activation member for controlling forcedly switching from the inactive state to the active state of the damping device to the stressed state of said activation member.
  • the basket when said deformable parallelogram structure is present, the basket is coupled to the deformable parallelogram structure by a pivoting connection with a so-called vertical axis, said axis extending orthogonally to the floor.
  • the basket when the upper end of the arm is coupled to the basket by an articulated connection comprising at least one deformable parallelogram structure, the basket is coupled to the deformable parallelogram structure by a pivoting connection with a so-called vertical axis, said axis extending orthogonally to the floor.
  • the platform 1 is a platform for working in personnel elevation.
  • This platform 1 includes a self-propelled rolling chassis 6.
  • This rolling chassis 6 is, for example, equipped with a thermal engine connected to the wheels of the machine by a transmission to drive the wheels of the machine in rotation.
  • the wheels could have been replaced by tracks in an equivalent manner.
  • This nacelle 1 also comprises a basket 2 which can be coupled to the self-propelled chassis 6.
  • This basket 2 comprises a control station 3 formed here by a control console equipped in particular with an articulated control lever called a joystick.
  • This control lever makes it possible, in a manner known per se, to control the elevation of the basket 2 which will be described below and the movement of the self-propelled chassis 6.
  • the control station 3 is therefore equipped with controls for moving the chassis 6 and for raising the basket 2.
  • This basket 2 comprises a floor 4 surmounted at least partially by a location 5 for receiving an operator inside which the operator takes a seat and can stand on the floor 4.
  • This reception location 5 is delimited by railings or guardrails which form the side walls 15 of the basket 2.
  • An access door can be provided in these side walls 15.
  • the basket 2 further comprises a base 14 extending under the floor 4 or merging with the floor 4 depending on the design of the basket 2.
  • the nacelle 1 also comprises, for coupling the basket 2 to the self-propelled chassis 6, an arm 91 for driving the basket 2 to move.
  • This arm 91 which can be a simple arm, a telescopic arm, or an articulated arm as in the example shown in Figure 1A , is a pivoting arm.
  • This arm 91 is coupled at one of its ends, called lower, to the chassis 6 by a pivot axis pivot connection, called horizontal, that is to say extending substantially horizontally to within ⁇ 15 degrees, in the positioned state of the self-propelled chassis 6 on a horizontal flat surface.
  • One or more jacks, called lifting jacks, of the arm 91 which, depending on the design of the arm, extend between the chassis 6 and the arm 91 and possibly between sections of the arm, when the arm is, as shown, an articulated arm, are provided.
  • the or at least one of the lifting cylinders is controllable from the control station 3 of the basket 2. This or these lifting cylinders allow, in a manner known per se, a movement of the arm 91 between an extreme low position close to the ground and an extreme high position away from the ground.
  • the opposite end, called the upper end, of the arm 91 is coupled to the basket 2, either directly, that is to say by a rigid connection in the simplest version, or by an articulated connection 21.
  • This articulated connection 21 can have a large number of forms.
  • this articulated connection 21 comprises a structure 92 with a deformable parallelogram called a pendulum structure.
  • This structure 92 with a deformable parallelogram is well known to those skilled in the art. It will not be described in more detail below.
  • this structure 92 with a deformable parallelogram is coupled to the upper end of the arm 91 by a pivot link 13 with a pivot axis, called horizontal, perpendicular to the longitudinal axis of the arm.
  • the pivot axis, called horizontal extends substantially parallel to the ground support plane of the chassis 6 in the positioned state of the chassis 6 on a horizontal flat surface.
  • the basket 2 is coupled to the structure 92 with a deformable parallelogram by a pivot link 18 with a so-called vertical axis, said axis extending orthogonally to the floor 4.
  • the structure 92 with deformable parallelogram is removed and the connection 18 with pivoting of so-called vertical axis is maintained.
  • a cylinder-type actuator i.e. formed by a cylinder, is arranged between the upper end of the arm 91 and said deformable parallelogram structure 92.
  • This actuator called a slave, represented at 20 in the figures, is generally in fluid communication with an actuator, called a master, also formed by a cylinder.
  • This master actuator is arranged between the arm 91 and the frame 6.
  • fluid communication it is meant that one of the chambers of the cylinder constituting the master actuator is connected by a first fluid circuit to one of the chambers of the cylinder constituting the slave actuator 20 and that the other chamber of the cylinder constituting the master actuator is connected by a second circuit to the other chamber of the cylinder of the slave actuator 20.
  • This cylinder constituting The slave actuator can also have its own control as shown in figure 2 .
  • this cylinder can be both a slave cylinder and an autonomous cylinder with its own control or exclusively a slave cylinder or exclusively an autonomous cylinder without departing from the scope of the invention.
  • this cylinder is a slave cylinder
  • the movement of the arm 91 under the action of the lifting cylinder(s) generates in parallel a movement of the master actuator and consequently of the slave actuator in fluid communication with the master actuator.
  • This assembly makes it possible to maintain the horizontality of the floor 4 of the basket 2 at least during a pivoting movement of the arm 91.
  • the nacelle 1 comprises a device 8 for determining a parameter representative of the angular position of the arm 91 relative to the extreme low and high positions of the arm 91.
  • This device 8 for determining a parameter representative of the angular position of the arm 91 can take a large number of forms.
  • This device 8 for determining a parameter representative of the angular position of the arm 91 can comprise at least one angular sensor arranged at the pivoting connection of the arm 91 to the chassis 6. This angular sensor allows the measurement of the angle formed by the arm with a plane passing through the longitudinal axis of the arm in the extreme low position of said arm.
  • the device 8 for determining a parameter representative of the angular position of the arm can be formed by a sensor, for example an inductive sensor, for detecting the extreme low position of the arm, the lifting of the arm from this extreme low position in which the arm is in abutment on the chassis being detected by said sensor.
  • a sensor for example an inductive sensor
  • additional sensors are provided at each section of the articulated arm and/or at the extended or retracted position of the telescope to reliably identify the extreme low position of the arm.
  • the extreme low position corresponds to an extreme low position of the arm or arm sections when the arm is articulated and, in addition, to the retraction of the telescope when the arm is a telescopic arm.
  • the nacelle 1 also comprises a control unit 10.
  • This control unit 10 is configured to acquire data from the device 8 for determining a parameter representative of the angular position of the arm 91.
  • This control unit 10 is in the form of an electronic and computer system which comprises, for example, a microprocessor and a working memory.
  • the control unit is in the form of an electronic and computer system which comprises, for example, a microprocessor and a working memory.
  • the control unit may be in the form of a programmable controller.
  • the functions and steps described may be implemented in the form of a computer program or via hardware components (e.g., programmable gate arrays).
  • control unit or its modules may be performed by computer instruction sets or modules implemented in a processor or controller or may be performed by dedicated electronic components or components of the programmable logic circuit type (or FPGA which is the acronym for field-programmable gate array) or of the application-specific integrated circuit type (or ASIC which is the acronym for application-specific integrated circuit). It is also possible to combine computer parts and electronic parts.
  • the unit or means or modules of said unit are configured to perform a given operation, this means that the unit comprises computer instructions and the corresponding execution means which make it possible to perform said operation and/or that the unit comprises corresponding electronic components.
  • the unit or means or modules of said unit are configured to perform a given operation, this means that the unit comprises computer instructions and the corresponding execution means which make it possible to perform said operation and/or that the unit comprises corresponding electronic components.
  • This control unit 10 may comprise a memory for storing a threshold value corresponding to the value of the angle formed by the arm in its extreme low position. Alternatively or additionally, this control unit 10 may also receive as input a signal from the inductive sensor described above corresponding to the fact that the arm 91 is no longer in stop and has been driven in movement in the direction of lifting, this signal being representative of the passage of the arm from the extreme low position to a position other than the extreme low position when the arm is not articulated.
  • the nacelle 1 also has two operating modes, one called operating mode in work configuration, the other called operating mode in transport configuration. These operating modes can be selectively activated depending on the data provided by the device 8 for determining a parameter representative of the angular position of the arm 91.
  • the control unit 10 is configured to control the activation of the operating mode in transport configuration when the arm 91 is in the extreme low position as defined above.
  • the control unit 10 is configured to control the activation of the operating mode in work configuration when the arm 91 moves from the extreme low position to another position. The activation of one or other of the operating modes therefore takes place automatically.
  • the operating modes in work configuration and in transport configuration are each defined at least by a maximum ground travel speed of the self-propelled chassis 6.
  • the maximum ground travel speed of the chassis 6 of the nacelle 1 is of the order of 0.6 km/h, while in the operating mode in transport configuration, the maximum ground travel speed of the chassis 6 of the nacelle can be at least 5 km/h.
  • the maximum travel speed of the self-propelled chassis 6 in the working configuration operating mode is lower than the maximum travel speed of the self-propelled chassis 6 in the transport configuration operating mode to avoid any risk accident when the arm is in the high position, i.e. in the working configuration operating mode.
  • the maximum travel speed of the self-propelled chassis 6 in the transport configuration operating mode is lower than the maximum travel speed of the self-propelled chassis 6 in the transport configuration operating mode to avoid any risk accident when the arm is in the high position, i.e. in the working configuration operating mode.
  • the nacelle 1 comprises at least one device 11 for damping the oscillation movements of the basket 2 when moving up and down, these oscillation movements being capable of occurring in particular when the rolling chassis 6 moves on the ground over uneven terrain. There is a risk of the operator being expelled from the basket 2 if these movements are of too great an amplitude. In addition, these oscillations place a great deal of strain on the operator, who must dampen these movements with his knees by constantly remaining flexed. This results in muscular fatigue for the operator.
  • This damping device 11 is an activatable/deactivatable device which is arranged between the location 5 for receiving the operator in the basket 2 and the upper end of the arm 91. This damping device 11 can affect a large number of shapes.
  • the damping device 11 comprises at least one hydraulic cylinder 12, as in the example shown in figure 2 , or several hydraulic cylinders in parallel as illustrated in figures 6 And 7 .
  • the or each hydraulic cylinder 12 comprises a body 121 and a piston 122 capable of sliding axially inside the body and separating said body into two chambers 123.
  • the chambers 123 are connected to each other by a fluid circuit 124 equipped with a closure member 125.
  • This closure member 125 is here formed by a solenoid valve.
  • This closure member 125 is mounted to move between an open position corresponding to the active state of the damping device 11 and a closed position corresponding to the inactive or deactivated state of the damping device 11 in which the transfer of fluid between said chambers 123 is prevented.
  • Each chamber contains an elastically deformable member 128, such as a spring, for returning the piston towards the other chamber.
  • the damping device 11 comprises two jacks 12 mounted in parallel and each arranged between the floor 4 and the bottom 14 of the basket 2.
  • the floor 4 and the bottom 14 are mounted to move in the direction of moving towards or away from each other in the activated state of the damping device 11.
  • each cylinder 12 of the damping device 11 is coupled to the bottom 14 of the basket 2 and the piston 122 of the cylinder 12 is coupled to the floor 4.
  • the piston 122 of each cylinder 12 is axially movable inside the body 121 in the driven state in relative displacement of the floor 4 and the bottom 14 in the direction of a move towards or away from each other in the active state of the damping device 11. This axial displacement of the piston 122 is damped by the passage of fluid from one chamber to another of the cylinder. In the deactivated or inactive state of the damping device 11, corresponding to the closed state of the closure member 125, any passage of fluid from one chamber to another is prevented and the floor 4 is then fixed relative to the bottom 14 of the basket 2.
  • the damping device 11 extends between two parts 161 and 162 of the basket, said parts of the basket being mounted to move relative to each other in the active state of the damping device 11.
  • the body of the cylinder of the damping device 11 is coupled to one of the parts and the piston of the cylinder to the other part.
  • one of the parts namely here the basket part 162 is coupled to the upper end of the arm 91 by the articulated connection 21, said articulated connection 21 comprising at least one pivoting connection 18 of so-called vertical axis, said axis extending orthogonally to the floor 4 of the basket 2 and the body 121 of the jack 12 of the damping device 11 is coupled to said part 162 of basket 2.
  • the piston 122 of said jack 12 is coupled to the other of the basket parts, namely the basket part 161 which extends between the basket part 162 described previously and the basket 2.
  • the piston 122 and the body 121 of the jack 12 are, in the active state of the damping device 11, mounted to move relative to each other in the driven state in relative displacement of said parts 161,162 basket.
  • This relative displacement of the basket parts 161 and 162 corresponds to a relative displacement of the basket parts 161 and 162 in a direction parallel to the axis of the pivot connection 18 of one of the basket parts to the arm 91.
  • control unit 10 is configured to control the passage of the closure member 125 from the open position to the closed position or vice versa depending on the active or inactive state of the desired damping device 11.
  • the control unit 10 is configured to control the activation or deactivation of the damping device 11 at least as a function of the data provided by the device 8 for determining a parameter representative of the angular position of the arm.
  • the damping device 11 is in the active state in the operating mode in the transport configuration of the nacelle and the control unit is configured to control the deactivation of the damping device 11, that is to say the transition of the damping device 11 from the active state to the inactive state when the arm 91 is moved away from the extreme low position due to an elevation by pivoting movement towards the extreme high position and/or an extension of the telescope in the case of a telescopic arm.
  • the transition of the nacelle from the operating mode in transport configuration to the operating mode in work configuration is accompanied by a deactivation of the damping device 11 and the transition of the nacelle from the operating mode in work configuration to the operating mode in transport configuration is accompanied by an activation of the damping device 11.
  • the damping device 11 can be positioned in various locations on the nacelle 1.
  • the damping device 11 extends between the upper end of the arm 91 and the deformable parallelogram structure 92 of the articulated connection 21 of the upper end of the arm 91 to the basket.
  • the nacelle 1 is of the type in which the upper end of the arm 91 for driving the basket 2 in movement is coupled to the basket by an articulated connection 21 comprising a deformable parallelogram structure 92.
  • the deformable parallelogram structure 92 is connected to the upper end of the arm 91 by a pivot connection 13 with a so-called horizontal pivot axis perpendicular to the longitudinal axis of the arm 91, and the or at least one of the damping devices 11 which is an activatable/deactivatable device arranged between the location 5 for receiving an operator of the basket 2 and the upper end of the arm 91 extends between the upper end of the arm 91 and the structure 92 with a deformable parallelogram.
  • the damping device 11 comprises a hydraulic cylinder 12 with a body 121 and a piston 122 separating said body 121 into two chambers 123.
  • the body 121 of the cylinder 12 is coupled to the arm 91 and the piston 122 of the cylinder 12 is coupled to the deformable parallelogram structure 92.
  • the reverse is also possible.
  • the deformable parallelogram structure 92 is mounted to move around the pivot axis of the pivot connection 13 coupling the arm 91 and the deformable parallelogram structure 92 in the driven state in axial displacement of the piston 122 inside the body 121 and the damping device 11 comprises a hydraulic accumulator 127 produced here in the form of a membrane accumulator in fluid communication with one of the chambers 123 of the cylinder 12 by a closable connection open in the active state of the damping device 11.
  • the shut-off member of the fluid connection is again a solenoid valve controlled in displacement by the control unit for the transition of the fluid connection from the open state to the closed state.
  • the chamber 123 arranged on the bottom side of the cylinder can allow, by its fluid connection with the hydraulic accumulator, in the open state of the connection, an evacuation of the contents of said chamber towards the hydraulic accumulator, this energy then being restitutable.
  • the basket 2 is coupled to the deformable parallelogram structure 92 by a pivoting connection 18 with a so-called vertical axis, said axis extending orthogonally to the floor 4.
  • the cylinder 12 has a body 121 and a piston 122 common with the slave actuator described above.
  • the piston 122 of the cylinder 12 can move axially inside the body 121 under the effect of a movement of the master actuator itself driven in movement under the action of the lifting cylinder. This results in simplicity of construction.
  • the nacelle may comprise a member 17 for forced activation of the damping device 11.
  • This activation member 17 is a manually actuated activation member for forcibly controlling the transition from the inactive state to the active state of the damping device 11 to the stressed state of said activation member 17.
  • This activation member 17 may be arranged at the level of the cockpit 3 and be formed by a button.
  • the operation is always similar.
  • the operating mode in transport configuration is activated and the damping device 11 is in the active state, i.e. the closure member 125 or 126 is in the open position.
  • the control unit receives as input the data from the device 8 for determining a parameter representative of the angular position of the arm and processes them.
  • the operating mode in work configuration is activated and the damping device 11 is deactivated, i.e. made inactive, by closing the closure member 125 or 126.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Civil Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Description

La présente invention concerne une nacelle élévatrice pour le travail en élévation de personne.The present invention relates to a lifting platform for working in the elevating of people.

Elle concerne en particulier une nacelle élévatrice pour le travail en élévation de personne comprenant :

  • un panier comprenant un poste de pilotage et un plancher surmonté au moins partiellement d'un emplacement de réception d'un opérateur,
  • un châssis automoteur,
  • un bras d'entraînement en déplacement du panier dont l'une des extrémités, dite inférieure, est reliée à pivotement au châssis pour un déplacement angulaire du bras entre une position extrême basse rapprochée du sol et une position extrême haute écartée du sol et dont l'extrémité opposée, dite supérieure, est couplée directement ou par une liaison articulée, au panier,
  • un dispositif de détermination d'un paramètre représentatif de la position angulaire du bras, et
  • une unité de pilotage configurée pour acquérir des données du dispositif de détermination d'un paramètre représentatif de la position angulaire du bras,
  • ladite nacelle présentant au moins deux modes de fonctionnement sélectivement activables, un mode de fonctionnement, dit en configuration transport, dans lequel le bras est en position extrême basse et un mode de fonctionnement, dit en configuration travail, activé lorsque le bras occupe une position autre que la position extrême basse, et l'unité de pilotage étant configurée pour commander l'activation de l'un ou l'autre des modes de fonctionnement de la nacelle au moins en fonction des données fournies par le dispositif de détermination d'un paramètre représentatif de la position angulaire du bras, les modes de fonctionnement en configuration travail et en configuration transport étant définis chacun au moins par une vitesse maximale de déplacement du châssis automoteur, la vitesse maximale de déplacement du châssis automoteur dans le mode de fonctionnement en configuration travail étant inférieure à la vitesse maximale de déplacement du châssis automoteur dans le mode de fonctionnement en configuration transport..
It relates in particular to a lifting platform for working in the elevation of people comprising:
  • a basket comprising a cockpit and a floor at least partially surmounted by a location for receiving an operator,
  • a self-propelled chassis,
  • a basket movement drive arm, one of whose ends, called the lower end, is pivotally connected to the chassis for angular movement of the arm between an extreme low position close to the ground and an extreme high position away from the ground and the opposite end, called the upper end, is coupled directly or by an articulated connection to the basket,
  • a device for determining a parameter representative of the angular position of the arm, and
  • a control unit configured to acquire data from the device for determining a parameter representative of the angular position of the arm,
  • said nacelle having at least two selectively activatable operating modes, an operating mode, called transport configuration, in which the arm is in the extreme low position and an operating mode, called work configuration, activated when the arm occupies a position other than the extreme low position, and the control unit being configured to control the activation of one or other of the operating modes of the nacelle at least as a function of the data provided by the device for determining a parameter representative of the angular position of the arm, the operating modes in work configuration and in transport configuration each being defined at least by a maximum speed of movement of the self-propelled chassis, the maximum speed of movement of the self-propelled chassis in the operating mode in work configuration being lower than the maximum travel speed of the self-propelled chassis in the transport configuration operating mode.

Les nacelles élévatrices sont bien connues à ceux versés dans cet art comme l'illustre par exemple la demande de brevet WO2019/158869 ou le brevet US11007838 , qui divulgue le préambule de la revendication 1. Les fabricants de telles nacelles sont à la recherche permanente d'une amélioration du confort de l'opérateur situé dans le panier sans nuire à la sécurité dudit opérateur ou à la qualité du travail réalisé.Lifting cradles are well known to those skilled in the art, as illustrated, for example, by the request for patent WO2019/158869 or the patent US11007838 , which discloses the preamble of claim 1. Manufacturers of such cradles are constantly seeking to improve the comfort of the operator located in the basket without harming the safety of said operator or the quality of the work carried out.

Un but de l'invention est donc de proposer une nacelle élévatrice dont la conception permet un confort accru pour le conducteur de la nacelle sans nuire à la qualité du travail pouvant être réalisé à partir de la nacelle.An aim of the invention is therefore to propose a lifting platform whose design allows increased comfort for the operator of the platform without compromising the quality of the work that can be carried out from the platform.

A cet effet, l'invention a pour objet une nacelle élévatrice pour le travail en élévation de personne, ladite nacelle comprenant :

  • un panier comprenant un poste de pilotage et un plancher surmonté au moins partiellement d'un emplacement de réception d'un opérateur,
  • un châssis automoteur,
  • un bras d'entraînement en déplacement du panier dont l'une des extrémités, dite inférieure, est reliée à pivotement au châssis pour un déplacement angulaire du bras entre une position extrême basse rapprochée du sol et une position extrême haute écartée du sol et dont l'extrémité opposée, dite supérieure, est couplée directement ou par une liaison articulée, au panier,
  • un dispositif de détermination d'un paramètre représentatif de la position angulaire du bras, et
  • une unité de pilotage configurée pour acquérir des données du dispositif de détermination d'un paramètre représentatif de la position angulaire du bras,
  • ladite nacelle présentant au moins deux modes de fonctionnement sélectivement activables, un mode de fonctionnement, dit en configuration transport, dans lequel le bras est en position extrême basse et un mode de fonctionnement, dit en configuration travail, activé lorsque le bras occupe une position autre que la position extrême basse, l'unité de pilotage étant configurée pour commander une activation de l'un ou l'autre des modes de fonctionnement de la nacelle au moins en fonction des données fournies par le dispositif de détermination d'un paramètre représentatif de la position angulaire du bras, les modes de fonctionnement en configuration travail et en configuration transport étant définis chacun au moins par une vitesse maximale de déplacement du châssis automoteur, la vitesse maximale de déplacement du châssis automoteur dans le mode de fonctionnement en configuration travail étant inférieure à la vitesse maximale de déplacement du châssis automoteur dans le mode de fonctionnement en configuration transport, caractérisée en ce que la nacelle comprend au moins un dispositif d'amortissement de mouvements d'oscillation en monte-et-baisse du plancher du panier, en ce que ce dispositif d'amortissement est un dispositif activable/désactivable disposé entre l'emplacement de réception d'un opérateur du panier et l'extrémité supérieure du bras et en ce que l'unité de pilotage est configurée pour commander l'activation ou la désactivation du dispositif d'amortissement au moins en fonction des données fournies par le dispositif de détermination d'un paramètre représentatif de la position angulaire du bras.
To this end, the invention relates to a lifting platform for working in the elevation of people, said platform comprising:
  • a basket comprising a cockpit and a floor at least partially surmounted by a location for receiving an operator,
  • a self-propelled chassis,
  • a basket movement drive arm, one of whose ends, called the lower end, is pivotally connected to the chassis for angular movement of the arm between an extreme low position close to the ground and an extreme high position away from the ground and the opposite end, called the upper end, is coupled directly or by an articulated connection to the basket,
  • a device for determining a parameter representative of the angular position of the arm, and
  • a control unit configured to acquire data from the device for determining a parameter representative of the angular position of the arm,
  • said nacelle having at least two selectively activatable operating modes, an operating mode, called in transport configuration, in which the arm is in the extreme low position and an operating mode, called in work configuration, activated when the arm occupies a position other than the extreme low position, the control unit being configured to command an activation of one or other of the operating modes of the nacelle at least as a function of the data provided by the device for determining a parameter representative of the angular position of the arm, the operating modes in work configuration and in transport configuration each being defined at least by a maximum speed of movement of the self-propelled chassis, the maximum speed of movement of the self-propelled chassis in the operating mode in work configuration being lower than the maximum speed of movement of the self-propelled chassis in the operating mode in transport configuration, characterized in that the nacelle comprises at least one device for damping oscillation movements in raising and lowering of the floor of the basket, in that this damping device is an activatable/deactivatable device arranged between the location for receiving an operator of the basket and the upper end of the arm and in that the control unit is configured to control the activation or deactivation of the damping device at least as a function of the data provided by the device for determining a parameter representative of the angular position of the arm.

Ladite nacelle présente donc deux modes de fonctionnement en fonction au moins de la position angulaire du bras à l'intérieur de la plage angulaire définie par les positions extrêmes haute et basse du bras, à savoir un mode de fonctionnement en configuration transport automatiquement activé lorsque le bras est en position extrême basse, et dans lequel la vitesse maximale de déplacement du châssis est supérieure à la vitesse maximale du châssis en mode de fonctionnement en configuration travail et un mode de fonctionnement en configuration travail automatiquement activé lorsque le bras occupe une position autre que la position extrême basse et dans lequel la vitesse maximale de déplacement du châssis est inférieure à la vitesse maximale du châssis en mode de fonctionnement en configuration transport. Cette conception permet d'éviter un déplacement au sol à grande vitesse du châssis dans le mode de fonctionnement en configuration travail dans lequel le bras occupe une position autre que la position extrême basse. En configuration travail, le bras est potentiellement en position élevée. Ces deux modes de fonctionnement sont sélectivement activables, c'est-à-dire que quand l'un des modes de fonctionnement est actif, l'autre des modes de fonctionnement est inactif et inversement. Le dispositif d'amortissement peut être activé ou désactivé en fonction du mode de fonctionnement activé. Généralement, le dispositif d'amortissement est activé, c'est-à-dire à l'état actif, dans le mode de fonctionnement en configuration transport et désactivable lors du passage du mode de fonctionnement en configuration transport au mode de fonctionnement en configuration travail. Le dispositif d'amortissement peut ainsi être à l'état inactif dans le mode de fonctionnement en configuration travail. Grâce au fait que le dispositif d'amortissement est activé dans le mode de fonctionnement en configuration transport, il est possible pour l'opérateur ayant pris place dans le panier de disposer d'un confort de conduite pendant les phases de roulage qui ont lieu essentiellement dans le mode de fonctionnement en configuration transport. Ce dispositif d'amortissement permet d'amortir de manière directe ou indirecte des mouvements d'oscillation en monte-et-baisse du panier observés en particulier lorsque le châssis roule à une vitesse élevée sur un sol irrégulier. La désactivation du dispositif d'amortissement lors du passage du mode de fonctionnement en configuration transport au mode de fonctionnement en configuration travail, permet à l'opérateur, dans le mode de fonctionnement en configuration travail, de ne pas être perturbé par une possibilité de déplacement du plancher du panier qui pourrait altérer la précision des gestes de l'opérateur.Said nacelle therefore has two operating modes depending at least on the angular position of the arm within the angular range defined by the extreme high and low positions of the arm, namely an operating mode in transport configuration automatically activated when the arm is in the extreme low position, and in which the maximum speed of movement of the chassis is greater than the maximum speed of the chassis in operating mode in work configuration and an operating mode in work configuration automatically activated when the arm occupies a position other than the extreme low position and in which the maximum speed of movement of the chassis is lower than the maximum speed of the chassis in operating mode in transport configuration. This design makes it possible to avoid high-speed ground movement of the chassis in the operating mode in work configuration in which the arm occupies a position other than the extreme low position. In work configuration, the arm is potentially in the raised position. These two operating modes are selectively activatable, that is to say that when one of the operating modes is active, the other of the operating modes is inactive and vice versa. The damping device can be activated or deactivated depending on the activated operating mode. Generally, the damping device is activated, i.e. in the active state, in the operating mode. operation in transport configuration and deactivatable when switching from the transport configuration operating mode to the work configuration operating mode. The damping device can thus be in the inactive state in the work configuration operating mode. Thanks to the fact that the damping device is activated in the transport configuration operating mode, it is possible for the operator seated in the basket to have driving comfort during the rolling phases which take place essentially in the transport configuration operating mode. This damping device makes it possible to directly or indirectly dampen the oscillating movements of the basket when raising and lowering observed in particular when the chassis is traveling at a high speed on uneven ground. The deactivation of the damping device when switching from the transport configuration operating mode to the work configuration operating mode allows the operator, in the work configuration operating mode, not to be disturbed by a possibility of movement of the basket floor which could impair the precision of the operator's movements.

Selon un mode de réalisation de l'invention, le dispositif d'amortissement est à l'état actif dans le mode de fonctionnement en configuration transport de la nacelle et l'unité de pilotage est configurée pour commander la désactivation du dispositif d'amortissement à l'état activé du mode de fonctionnement en configuration travail de la nacelle. En d'autres termes, le dispositif d'amortissement est à l'état actif dans le mode de fonctionnement en configuration transport de la nacelle et l'unité de pilotage est configurée pour commander la désactivation du dispositif d'amortissement, lorsque le bras est écarté angulairement de la position extrême basse. L'unité de pilotage est donc configurée pour commander le passage de l'état actif à l'état inactif du dispositif d'amortissement, en fonction de la position angulaire occupée par le bras entre les positions extrêmes basse et haute. Le passage de la nacelle du mode de fonctionnement en configuration transport au mode de fonctionnement en configuration travail s'accompagne d'une désactivation du dispositif d'amortissement et le passage de la nacelle du mode de fonctionnement en configuration travail au mode de fonctionnement en configuration transport s'accompagne d'une activation du dispositif d'amortissement.According to one embodiment of the invention, the damping device is in the active state in the operating mode in the transport configuration of the nacelle and the control unit is configured to control the deactivation of the damping device in the activated state of the operating mode in the work configuration of the nacelle. In other words, the damping device is in the active state in the operating mode in the transport configuration of the nacelle and the control unit is configured to control the deactivation of the damping device, when the arm is angularly moved away from the extreme low position. The control unit is therefore configured to control the transition from the active state to the inactive state of the damping device, depending on the angular position occupied by the arm between the extreme low and high positions. The transition of the nacelle from the operating mode in transport configuration to the operating mode in work configuration is accompanied by a deactivation of the damping device and the transition of the nacelle from the operating mode in work configuration to the operating mode in transport configuration is accompanied by an activation of the damping device.

Selon un mode de réalisation de l'invention, le ou au moins l'un des dispositifs d'amortissement comprend au moins un vérin hydraulique, le ou au moins l'un des vérins comprenant un corps et un piston, le corps et le piston étant mobiles l'un par rapport à l'autre, ledit piston séparant ledit corps en deux chambres.According to one embodiment of the invention, the or at least one of the damping devices comprises at least one hydraulic cylinder, the or at least one of the cylinders comprising a body and a piston, the body and the piston being movable relative to each other, said piston separating said body into two chambers.

Selon un mode de réalisation de l'invention, les deux chambres sont reliées entre elles par un circuit fluidique équipé d'un organe d'obturation monté mobile entre une position ouverte correspondant à l'état actif du dispositif d'amortissement et une position fermée, correspondant à l'état inactif du dispositif d'amortissement, dans laquelle tout transfert de fluide entre lesdites chambres est empêché, chaque chambre logeant au moins un organe élastiquement déformable de rappel du piston en direction de l'autre chambre. En pratique, le corps et le piston du vérin peuvent être disposés sur la chaine de transmission de mouvement entre l'extrémité supérieure du bras et l'emplacement de réception d'un opérateur du panier et sont interposables entre deux parties distinctes de la nacelle montées déplaçables de manière relative l'une par rapport l'autre, le déplacement de fluide entre lesdites chambres du vérin permettant d'amortir ce déplacement relatif desdites parties entre elles.According to one embodiment of the invention, the two chambers are connected to each other by a fluid circuit equipped with a closure member mounted to move between an open position corresponding to the active state of the damping device and a closed position, corresponding to the inactive state of the damping device, in which any transfer of fluid between said chambers is prevented, each chamber housing at least one elastically deformable member for returning the piston towards the other chamber. In practice, the body and the piston of the jack can be arranged on the movement transmission chain between the upper end of the arm and the location for receiving an operator of the basket and can be interposed between two separate parts of the nacelle mounted to move relative to each other, the movement of fluid between said chambers of the jack making it possible to dampen this relative movement of said parts between them.

Selon un mode de réalisation de l'invention, le panier comprend un fond et des parois latérales entourant ledit fond, le plancher s'étend au-dessus dudit fond et le ou au moins l'un des dispositifs d'amortissement qui est un dispositif activable/désactivable disposé entre l'emplacement de réception d'un opérateur du panier et l'extrémité supérieure du bras s'étend entre le plancher et le fond du panier, le plancher et le fond étant montés mobiles dans le sens d'un rapprochement ou d'un écartement l'un de l'autre à l'état actif du dispositif d'amortissement. Cette disposition permet d'amortir au plus près du plancher les mouvements d'oscillation du plancher en particulier lorsque le châssis se déplace sur un sol irrégulier à grande vitesse de sorte que le confort de l'opérateur se trouvant dans la nacelle est accru.According to one embodiment of the invention, the basket comprises a bottom and side walls surrounding said bottom, the floor extends above said bottom and the or at least one of the damping devices which is an activatable/deactivatable device arranged between the receiving location of an operator of the basket and the upper end of the arm extends between the floor and the bottom of the basket, the floor and the bottom being mounted to move in the direction of moving towards or away from each other in the active state of the damping device. This arrangement makes it possible to dampen the oscillating movements of the floor as close as possible to the floor, particularly when the chassis is moving over uneven ground at high speed, so that the comfort of the operator in the basket is increased.

Selon un mode de réalisation de l'invention, le corps du vérin du dispositif d'amortissement est couplé au fond du panier et le piston dudit vérin est couplé au plancher ou inversement et le piston et le corps sont montés mobiles l'un par rapport à l'autre à l'état entraîné en déplacement relatif du plancher et du fond dans le sens d'un rapprochement ou d'un écartement l'un de l'autre à l'état actif du dispositif d'amortissement. A l'état inactif du dispositif d'amortissement, tout déplacement relatif du plancher et du fond dans le sens d'un rapprochement ou d'un écartement l'un de l'autre est empêché. En d'autres termes, le plancher et le fond sont montés fixes à l'état inactif du dispositif d'amortissement. Ainsi, le travail de l'opérateur n'est pas perturbé par une quelconque oscillation du plancher à l'état inactif du dispositif d'amortissement.According to one embodiment of the invention, the body of the cylinder of the damping device is coupled to the bottom of the basket and the piston of said cylinder is coupled to the floor or vice versa and the piston and the body are mounted to move relative to each other in the driven state in relative displacement of the floor and the bottom in the direction of moving towards or away from each other in the active state. of the damping device. In the inactive state of the damping device, any relative movement of the floor and the bottom in the direction of moving towards or away from each other is prevented. In other words, the floor and the bottom are mounted fixed in the inactive state of the damping device. Thus, the operator's work is not disturbed by any oscillation of the floor in the inactive state of the damping device.

Selon un mode de réalisation de l'invention, le ou au moins l'un des dispositifs d'amortissement qui est un dispositif activable/désactivable disposé entre l'emplacement de réception d'un opérateur du panier et l'extrémité supérieure du bras s'étend entre deux parties de panier, et lesdites parties de panier sont montées mobiles l'une par rapport à l'autre à l'état actif du dispositif d'amortissement.According to one embodiment of the invention, the or at least one of the damping devices which is an activatable/deactivatable device arranged between the receiving location of an operator of the basket and the upper end of the arm extends between two basket parts, and said basket parts are mounted to move relative to each other in the active state of the damping device.

Selon un mode de réalisation de l'invention, l'une des parties de panier est couplée à l'extrémité supérieure du bras par la liaison articulée couplant l'extrémité supérieure du bras au panier, cette liaison articulée comprenant au moins une liaison à pivotement d'axe dit vertical, ledit axe s'étendant orthogonalement au plancher et le corps du vérin du dispositif d'amortissement est couplé à l'une des parties de panier et le piston dudit vérin est couplé à l'autre des parties de panier et le piston et le corps sont, à l'état actif du dispositif d'amortissement, montés mobiles l'un par rapport à l'autre à l'état entraîné en déplacement relatif desdites parties de panier.According to one embodiment of the invention, one of the basket parts is coupled to the upper end of the arm by the articulated connection coupling the upper end of the arm to the basket, this articulated connection comprising at least one pivoting connection with a so-called vertical axis, said axis extending orthogonally to the floor and the body of the cylinder of the damping device is coupled to one of the basket parts and the piston of said cylinder is coupled to the other of the basket parts and the piston and the body are, in the active state of the damping device, mounted to move relative to each other in the driven state in relative displacement of said basket parts.

Selon un mode de réalisation de l'invention, la nacelle étant du type dont l'extrémité supérieure du bras d'entraînement en déplacement du panier est couplée au panier par une liaison articulée comprenant au moins une structure à parallélogramme déformable au panier, la structure à parallélogramme déformable est reliée à l'extrémité supérieure du bras par une liaison pivot d'axe pivot dit horizontal perpendiculaire à l'axe longitudinal du bras, et le ou au moins l'un des dispositifs d'amortissement qui est un dispositif activable/désactivable disposé entre l'emplacement de réception d'un opérateur du panier et l'extrémité supérieure du bras s'étend entre l'extrémité supérieure du bras et la structure à parallélogramme déformable.According to one embodiment of the invention, the nacelle being of the type in which the upper end of the arm for driving the basket in movement is coupled to the basket by an articulated connection comprising at least one structure with a parallelogram deformable to the basket, the structure with a deformable parallelogram is connected to the upper end of the arm by a pivot connection with a so-called horizontal pivot axis perpendicular to the longitudinal axis of the arm, and the or at least one of the damping devices which is an activatable/deactivatable device arranged between the location for receiving an operator of the basket and the upper end of the arm extends between the upper end of the arm and the structure with a deformable parallelogram.

Selon un mode de réalisation de l'invention, le ou au moins l'un des dispositifs d'amortissement comprenant au moins un vérin hydraulique avec un corps et un piston séparant ledit corps en deux chambres, le corps du vérin est couplé au bras et le piston dudit vérin est couplé à la structure à parallélogramme déformable ou inversement, la structure à parallélogramme déformable est montée mobile autour de l'axe pivot de la liaison pivot couplant le bras et la structure à parallélogramme déformable à l'état entraîné en déplacement axial du piston à l'intérieur du corps et le dispositif d'amortissement comprend un accumulateur hydraulique en communication fluidique avec l'une des chambres du vérin par une liaison obturable ouverte à l'état actif du dispositif d'amortissement. Cette conception se caractérise par sa simplicité. Cette conception permet d'utiliser le vérin déjà présent et utilisé comme vérin de correction de l'horizontalité du plancher du panier comme dispositif d'amortissement en lui associant un accumulateur hydraulique, ce dispositif d'amortissement étant activé lorsque la liaison fluidique obturable entre l'accumulateur et le vérin est ouverte. Il en résulte une conception simplifiée de la nacelle.According to one embodiment of the invention, the or at least one of the damping devices comprising at least one hydraulic cylinder with a body and a piston separating said body into two chambers, the body of the cylinder is coupled to the arm and the piston of said cylinder is coupled to the deformable parallelogram structure or vice versa, the deformable parallelogram structure is mounted movably around the pivot axis of the pivot connection coupling the arm and the deformable parallelogram structure in the driven state in axial displacement of the piston inside the body and the damping device comprises a hydraulic accumulator in fluid communication with one of the chambers of the cylinder by a closable connection open in the active state of the damping device. This design is characterized by its simplicity. This design allows the use of the existing cylinder used as a cylinder for correcting the horizontality of the basket floor as a damping device by associating it with a hydraulic accumulator, this damping device being activated when the closable fluid connection between the accumulator and the cylinder is open. This results in a simplified design of the nacelle.

Selon un mode de réalisation de l'invention, le dispositif de détermination d'un paramètre représentatif de la position angulaire du bras comprend au moins un capteur inductif de détection de la position extrême basse du bras. Ce capteur inductif peut permettre la détection du bras en butée sur le châssis en position extrême basse. L'élévation du bras et l'absence de contact du bras avec la butée qui en résulte peuvent être détectées par le capteur inductif. Cette information de détection peut être transmise à l'unité de pilotage. En variante ou en complément, le dispositif peut comprendre un capteur angulaire de mesure de la position angulaire du bras par rapport à l'une des positions extrêmes. Ces conditions nécessaires peuvent être complétées d'autres conditions en particulier lorsque le bras est un bras télescopique. La position extrême basse se définit dans ce cas également par une position rentrée du bras.According to one embodiment of the invention, the device for determining a parameter representative of the angular position of the arm comprises at least one inductive sensor for detecting the lowest extreme position of the arm. This inductive sensor can enable the detection of the arm in abutment on the chassis in the lowest extreme position. The elevation of the arm and the resulting absence of contact of the arm with the stop can be detected by the inductive sensor. This detection information can be transmitted to the control unit. Alternatively or additionally, the device can comprise an angular sensor for measuring the angular position of the arm relative to one of the extreme positions. These necessary conditions can be supplemented by other conditions, in particular when the arm is a telescopic arm. The lowest extreme position is also defined in this case by a retracted position of the arm.

Selon un mode de réalisation de l'invention, ladite nacelle comprend un organe d'activation forcée du dispositif d'amortissement, cet organe d'activation forcée étant un organe d'activation à actionnement manuel pour commander de manière forcée le passage de l'état inactif à l'état actif du dispositif d'amortissement à l'état sollicité dudit organe d'activation.According to one embodiment of the invention, said nacelle comprises a forced activation member of the damping device, this forced activation member being a manually operated activation member for controlling forcedly switching from the inactive state to the active state of the damping device to the stressed state of said activation member.

Selon un mode de réalisation de l'invention, lorsque ladite structure à parallélogramme déformable est présente, le panier est couplé à la structure à parallélogramme déformable par une liaison à pivotement d'axe dit vertical, ledit axe s'étendant orthogonalement au plancher.According to one embodiment of the invention, when said deformable parallelogram structure is present, the basket is coupled to the deformable parallelogram structure by a pivoting connection with a so-called vertical axis, said axis extending orthogonally to the floor.

Selon un mode de réalisation de l'invention, lorsque l'extrémité supérieure du bras est couplée au panier par une liaison articulée comprenant au moins une structure à parallélogramme déformable, le panier est couplé à la structure à parallélogramme déformable par une liaison à pivotement d'axe dit vertical, ledit axe s'étendant orthogonalement au plancher.According to one embodiment of the invention, when the upper end of the arm is coupled to the basket by an articulated connection comprising at least one deformable parallelogram structure, the basket is coupled to the deformable parallelogram structure by a pivoting connection with a so-called vertical axis, said axis extending orthogonally to the floor.

Brève description des dessinsBrief description of the drawings

L'invention sera bien comprise à la lecture de la description suivante d'exemples de réalisation, en référence aux dessins annexés dans lesquels :

  • [Fig. 1A] représente une vue en perspective d'une nacelle conforme à l'invention en mode de fonctionnement en configuration transport,
  • [Fig. 1B] représente une vue en perspective d'une nacelle conforme à l'invention en mode de fonctionnement en configuration travail,
  • [Fig. 2] représente une vue partielle de la nacelle à l'état actif du dispositif d'amortissement,
  • [Fig. 3] représente une vue partielle de la nacelle à l'état inactif du dispositif d'amortissement,
  • [Fig. 4] représente une vue partielle de la nacelle à l'état inactif du dispositif d'amortissement,
  • [Fig. 5] représente une vue partielle de la nacelle à l'état actif du dispositif d'amortissement,
  • [Fig. 6] représente une vue partielle de la nacelle à l'état inactif du dispositif d'amortissement,
  • [Fig. 7] représente une vue partielle de la nacelle à l'état actif du dispositif d'amortissement.
The invention will be clearly understood upon reading the following description of exemplary embodiments, with reference to the appended drawings in which:
  • [ Fig. 1A ] represents a perspective view of a nacelle according to the invention in operating mode in transport configuration,
  • [ Fig. 1B ] represents a perspective view of a nacelle according to the invention in operating mode in work configuration,
  • [ Fig. 2 ] represents a partial view of the nacelle in the active state of the damping device,
  • [ Fig. 3 ] represents a partial view of the nacelle in the inactive state of the damping device,
  • [ Fig. 4 ] represents a partial view of the nacelle in the inactive state of the damping device,
  • [ Fig. 5 ] represents a partial view of the nacelle in the active state of the damping device,
  • [ Fig. 6 ] represents a partial view of the nacelle in the inactive state of the damping device,
  • [ Fig. 7 ] represents a partial view of the nacelle in the active state of the damping device.

Comme mentionné ci-dessus, la nacelle 1 est une nacelle pour le travail en élévation de personne. Cette nacelle 1 comprend un châssis 6 roulant automoteur.As mentioned above, the platform 1 is a platform for working in personnel elevation. This platform 1 includes a self-propelled rolling chassis 6.

Ce châssis 6 roulant est, par exemple, équipé d'un moteur thermique relié aux roues de l'engin par une transmission pour entraîner en rotation les roues de l'engin. Les roues auraient pu de manière équivalente être remplacées par des chenilles.This rolling chassis 6 is, for example, equipped with a thermal engine connected to the wheels of the machine by a transmission to drive the wheels of the machine in rotation. The wheels could have been replaced by tracks in an equivalent manner.

Cette nacelle 1 comprend encore un panier 2 couplable au châssis 6 automoteur. Ce panier 2 comprend un poste 3 de pilotage formé ici d'un pupitre de commande équipé notamment d'un levier de commande articulé appelé joystick. Ce levier de commande permet de manière en soi connue de commander l'élévation du panier 2 qui sera décrit ci-après et le déplacement du châssis 6 automoteur. Le poste 3 de pilotage est donc équipé de commandes en déplacement du châssis 6 et en élévation du panier 2. Ce panier 2 comprend un plancher 4 surmonté au moins partiellement d'un emplacement 5 de réception d'un opérateur à l'intérieur duquel l'opérateur prend place en pouvant se tenir debout sur le plancher 4. Cet emplacement 5 de réception est délimité par des rambardes ou garde-corps qui forment les parois 15 latérales du panier 2. Une porte d'accès peut être ménagée dans ces parois 15 latérales. Le panier 2 comprend encore un fond 14 s'étendant sous le plancher 4 ou confondu avec le plancher 4 selon la conception du panier 2.This nacelle 1 also comprises a basket 2 which can be coupled to the self-propelled chassis 6. This basket 2 comprises a control station 3 formed here by a control console equipped in particular with an articulated control lever called a joystick. This control lever makes it possible, in a manner known per se, to control the elevation of the basket 2 which will be described below and the movement of the self-propelled chassis 6. The control station 3 is therefore equipped with controls for moving the chassis 6 and for raising the basket 2. This basket 2 comprises a floor 4 surmounted at least partially by a location 5 for receiving an operator inside which the operator takes a seat and can stand on the floor 4. This reception location 5 is delimited by railings or guardrails which form the side walls 15 of the basket 2. An access door can be provided in these side walls 15. The basket 2 further comprises a base 14 extending under the floor 4 or merging with the floor 4 depending on the design of the basket 2.

La nacelle 1 comprend encore, pour le couplage du panier 2 au châssis 6 automoteur, un bras 91 d'entraînement en déplacement du panier 2. Ce bras 91, qui peut être un simple bras, un bras télescopique, ou un bras articulé comme dans l'exemple représenté à la figure 1A, est un bras pivotant. Ce bras 91 est couplé à l'une de ses extrémités, dite inférieure, au châssis 6 par une liaison pivot d'axe pivot, dit horizontal c'est-à-dire s'étendant sensiblement à l'horizontale à ± 15 degrés près, à l'état positionné du châssis 6 automoteur sur une surface plane horizontale.The nacelle 1 also comprises, for coupling the basket 2 to the self-propelled chassis 6, an arm 91 for driving the basket 2 to move. This arm 91, which can be a simple arm, a telescopic arm, or an articulated arm as in the example shown in Figure 1A , is a pivoting arm. This arm 91 is coupled at one of its ends, called lower, to the chassis 6 by a pivot axis pivot connection, called horizontal, that is to say extending substantially horizontally to within ± 15 degrees, in the positioned state of the self-propelled chassis 6 on a horizontal flat surface.

Un ou plusieurs vérins, dits de levage, du bras 91 qui selon la conception du bras s'étendent entre le châssis 6 et le bras 91 et éventuellement entre des sections du bras, lorsque le bras est comme représenté un bras articulé, sont prévus. Le ou au moins l'un des vérins de levage est commandable à partir du poste 3 de pilotage du panier 2. Ce ou ces vérins de levage permettent de manière en soi connue un déplacement du bras 91 entre une position extrême basse rapprochée du sol et une position extrême haute écartée du sol. L'extrémité opposée dite supérieure du bras 91 est quant à elle couplée au panier 2, soit directement, c'est-à-dire par une liaison rigide dans la version la plus simple, soit par une liaison 21 articulée. Cette liaison 21 articulée peut avoir un grand nombre de formes. Dans l'exemple de la figure 2, cette liaison 21 articulée comprend une structure 92 à parallélogramme déformable appelée structure pendulaire. Cette structure 92 à parallélogramme déformable est bien connue à ceux versés dans cet art. Elle ne sera pas décrite plus en détail ci-après.One or more jacks, called lifting jacks, of the arm 91 which, depending on the design of the arm, extend between the chassis 6 and the arm 91 and possibly between sections of the arm, when the arm is, as shown, an articulated arm, are provided. The or at least one of the lifting cylinders is controllable from the control station 3 of the basket 2. This or these lifting cylinders allow, in a manner known per se, a movement of the arm 91 between an extreme low position close to the ground and an extreme high position away from the ground. The opposite end, called the upper end, of the arm 91 is coupled to the basket 2, either directly, that is to say by a rigid connection in the simplest version, or by an articulated connection 21. This articulated connection 21 can have a large number of forms. In the example of the figure 2 , this articulated connection 21 comprises a structure 92 with a deformable parallelogram called a pendulum structure. This structure 92 with a deformable parallelogram is well known to those skilled in the art. It will not be described in more detail below.

Dans l'exemple représenté par exemple à la figure 2, cette structure 92 à parallélogramme déformable est couplée à l'extrémité supérieure du bras 91 par une liaison 13 pivot d'axe pivot, dit horizontal, perpendiculaire à l'axe longitudinal du bras. L'axe pivot, dit horizontal, s'étend sensiblement parallèlement au plan d'appui au sol du châssis 6 à l'état positionné du châssis 6 sur une surface plane horizontale. Le panier 2 est couplé à la structure 92 à parallélogramme déformable par une liaison 18 à pivotement d'axe dit vertical, ledit axe s'étendant orthogonalement au plancher 4. Dans une version plus simple de la liaison 21 articulée, comme illustrée par exemple à la figure 6, la structure 92 à parallélogramme déformable est supprimée et la liaison 18 à pivotement d'axe dit vertical est maintenue.In the example shown for example in the figure 2 , this structure 92 with a deformable parallelogram is coupled to the upper end of the arm 91 by a pivot link 13 with a pivot axis, called horizontal, perpendicular to the longitudinal axis of the arm. The pivot axis, called horizontal, extends substantially parallel to the ground support plane of the chassis 6 in the positioned state of the chassis 6 on a horizontal flat surface. The basket 2 is coupled to the structure 92 with a deformable parallelogram by a pivot link 18 with a so-called vertical axis, said axis extending orthogonally to the floor 4. In a simpler version of the articulated link 21, as illustrated for example in figure 6 , the structure 92 with deformable parallelogram is removed and the connection 18 with pivoting of so-called vertical axis is maintained.

Un actionneur de type vérin, c'est-à-dire formé par un vérin, est disposé entre l'extrémité supérieure du bras 91 et ladite structure 92 à parallélogramme déformable. Cet actionneur, dit esclave, représenté en 20 aux figures, est en général, en communication fluidique avec un actionneur, dit maître, également formé par un vérin. Cet actionneur maître est disposé entre le bras 91 et le châssis 6. Par "communication fluidique", on entend que l'une des chambres du vérin constitutif de l'actionneur maître est reliée par un premier circuit de fluide à l'une des chambres du vérin constitutif de l'actionneur esclave 20 et que l'autre chambre du vérin constitutif de l'actionneur maître est reliée par un second circuit à l'autre chambre du vérin de l'actionneur esclave 20. Ce vérin constitutif de l'actionneur esclave peut également disposer de sa propre commande comme illustré à la figure 2. Ainsi, ce vérin peut être à la fois un vérin esclave et un vérin autonome avec sa propre commande ou exclusivement un vérin esclave ou exclusivement un vérin autonome sans sortir du cadre de l'invention.A cylinder-type actuator, i.e. formed by a cylinder, is arranged between the upper end of the arm 91 and said deformable parallelogram structure 92. This actuator, called a slave, represented at 20 in the figures, is generally in fluid communication with an actuator, called a master, also formed by a cylinder. This master actuator is arranged between the arm 91 and the frame 6. By "fluid communication", it is meant that one of the chambers of the cylinder constituting the master actuator is connected by a first fluid circuit to one of the chambers of the cylinder constituting the slave actuator 20 and that the other chamber of the cylinder constituting the master actuator is connected by a second circuit to the other chamber of the cylinder of the slave actuator 20. This cylinder constituting The slave actuator can also have its own control as shown in figure 2 . Thus, this cylinder can be both a slave cylinder and an autonomous cylinder with its own control or exclusively a slave cylinder or exclusively an autonomous cylinder without departing from the scope of the invention.

Dans le cas où ce vérin est un vérin esclave, le déplacement du bras 91 sous l'action du ou de l'un des vérins de levage génère en parallèle un déplacement de l'actionneur maître et par suite de l'actionneur esclave en communication fluidique avec l'actionneur maître. Ce montage permet de conserver l'horizontalité du plancher 4 du panier 2 au moins lors d'un déplacement à pivotement du bras 91.In the case where this cylinder is a slave cylinder, the movement of the arm 91 under the action of the lifting cylinder(s) generates in parallel a movement of the master actuator and consequently of the slave actuator in fluid communication with the master actuator. This assembly makes it possible to maintain the horizontality of the floor 4 of the basket 2 at least during a pivoting movement of the arm 91.

La nacelle 1 comprend un dispositif 8 de détermination d'un paramètre représentatif de la position angulaire du bras 91 par rapport aux positions extrêmes basse et haute du bras 91.The nacelle 1 comprises a device 8 for determining a parameter representative of the angular position of the arm 91 relative to the extreme low and high positions of the arm 91.

Ce dispositif 8 de détermination d'un paramètre représentatif de la position angulaire du bras 91 peut affecter un grand nombre de formes. Ce dispositif 8 de détermination d'un paramètre représentatif de la position angulaire du bras 91 peut comprendre au moins un capteur angulaire disposé au niveau de la liaison à pivotement du bras 91 au châssis 6. Ce capteur angulaire permet la mesure de l'angle formé par le bras avec un plan passant par l'axe longitudinal du bras en position extrême basse dudit bras. En variante ou en complément, le dispositif 8 de détermination d'un paramètre représentatif de la position angulaire du bras peut être formé par un capteur par exemple inductif de détection de la position extrême basse du bras, le soulèvement du bras depuis cette position extrême basse dans laquelle le bras est en butée sur le châssis étant détectée par ledit capteur. Dans le cas d'un bras articulé et/ou télescopique, des capteurs supplémentaires sont prévus au niveau de chaque section du bras articulé et/ou au niveau de la position sortie ou rentrée du télescope pour identifier de manière sûre la position extrême basse du bras. Ainsi la position extrême basse correspond à une position extrême basse du bras ou des sections de bras lorsque le bras est articulé et, en sus, à la rentrée du télescope lorsque le bras est un bras télescopique.This device 8 for determining a parameter representative of the angular position of the arm 91 can take a large number of forms. This device 8 for determining a parameter representative of the angular position of the arm 91 can comprise at least one angular sensor arranged at the pivoting connection of the arm 91 to the chassis 6. This angular sensor allows the measurement of the angle formed by the arm with a plane passing through the longitudinal axis of the arm in the extreme low position of said arm. Alternatively or in addition, the device 8 for determining a parameter representative of the angular position of the arm can be formed by a sensor, for example an inductive sensor, for detecting the extreme low position of the arm, the lifting of the arm from this extreme low position in which the arm is in abutment on the chassis being detected by said sensor. In the case of an articulated and/or telescopic arm, additional sensors are provided at each section of the articulated arm and/or at the extended or retracted position of the telescope to reliably identify the extreme low position of the arm. Thus the extreme low position corresponds to an extreme low position of the arm or arm sections when the arm is articulated and, in addition, to the retraction of the telescope when the arm is a telescopic arm.

La nacelle 1 comprend encore une unité 10 de pilotage. Cette unité 10 de pilotage est configurée pour acquérir des données du dispositif 8 de détermination d'un paramètre représentatif de la position angulaire du bras 91.The nacelle 1 also comprises a control unit 10. This control unit 10 is configured to acquire data from the device 8 for determining a parameter representative of the angular position of the arm 91.

Cette unité 10 de pilotage se présente sous la forme d'un système électronique et informatique qui comprend par exemple un microprocesseur et une mémoire de travail. Selon un aspect particulier, l'unité de pilotage se présente sous la forme d'un système électronique et informatique qui comprend par exemple un microprocesseur et une mémoire de travail. Selon un aspect particulier, l'unité de pilotage peut se présenter sous la forme d'un automate programmable. Autrement dit, les fonctions et étapes décrites peuvent être mises en œuvre sous forme de programme informatique ou via des composants matériels (p. ex. des réseaux de portes programmables). En particulier, les fonctions et étapes opérées par l'unité de pilotage ou ses modules peuvent être réalisées par des jeux d'instructions ou modules informatiques implémentés dans un processeur ou contrôleur ou être réalisées par des composants électroniques dédiés ou des composants de type circuit logique programmable (ou FPGA qui est l'acronyme de l'anglais field-programmable gate array, ce qui correspond littéralement à réseau de portes programmable in-situ) ou de type circuit intégré propre à une application (ou ASIC qui est l'acronyme de l'anglais application-specific integrated circuit, ce qui correspond littéralement à circuit intégré spécifique à une application). Il est aussi possible de combiner des parties informatiques et des parties électroniques. Lorsqu'il est précisé que l'unité ou des moyens ou modules de ladite unité sont configurés pour réaliser une opération donnée, cela signifie que l'unité comprend des instructions informatiques et les moyens d'exécution correspondants qui permettent de réaliser ladite opération et/ou que l'unité comprend des composants électroniques correspondants.This control unit 10 is in the form of an electronic and computer system which comprises, for example, a microprocessor and a working memory. According to a particular aspect, the control unit is in the form of an electronic and computer system which comprises, for example, a microprocessor and a working memory. According to a particular aspect, the control unit may be in the form of a programmable controller. In other words, the functions and steps described may be implemented in the form of a computer program or via hardware components (e.g., programmable gate arrays). In particular, the functions and steps performed by the control unit or its modules may be performed by computer instruction sets or modules implemented in a processor or controller or may be performed by dedicated electronic components or components of the programmable logic circuit type (or FPGA which is the acronym for field-programmable gate array) or of the application-specific integrated circuit type (or ASIC which is the acronym for application-specific integrated circuit). It is also possible to combine computer parts and electronic parts. When it is specified that the unit or means or modules of said unit are configured to perform a given operation, this means that the unit comprises computer instructions and the corresponding execution means which make it possible to perform said operation and/or that the unit comprises corresponding electronic components.

Il est aussi possible de combiner des parties informatiques et des parties électroniques. Lorsqu'il est précisé que l'unité ou des moyens ou modules de ladite unité sont configurés pour réaliser une opération donnée, cela signifie que l'unité comprend des instructions informatiques et les moyens d'exécution correspondants qui permettent de réaliser ladite opération et/ou que l'unité comprend des composants électroniques correspondants.It is also possible to combine computer parts and electronic parts. When it is specified that the unit or means or modules of said unit are configured to perform a given operation, this means that the unit comprises computer instructions and the corresponding execution means which make it possible to perform said operation and/or that the unit comprises corresponding electronic components.

Cette unité 10 de pilotage peut comprendre une mémoire de stockage d'une valeur seuil correspondant à la valeur de l'angle formé par le bras dans sa position extrême basse. En variante ou en complément, cette unité 10 de pilotage peut également recevoir en entrée un signal du capteur inductif décrit ci-dessus correspondant au fait que le bras 91 n'est plus en butée et a été entraîné en déplacement dans le sens d'un soulèvement, ce signal étant représentatif du passage du bras de la position extrême basse à une position autre que la position extrême basse lorsque le bras n'est pas articulé.This control unit 10 may comprise a memory for storing a threshold value corresponding to the value of the angle formed by the arm in its extreme low position. Alternatively or additionally, this control unit 10 may also receive as input a signal from the inductive sensor described above corresponding to the fact that the arm 91 is no longer in stop and has been driven in movement in the direction of lifting, this signal being representative of the passage of the arm from the extreme low position to a position other than the extreme low position when the arm is not articulated.

La nacelle 1 présente encore deux modes de fonctionnement appelés, l'un, mode de fonctionnement en configuration travail, l'autre, mode de fonctionnement en configuration transport. Ces modes de fonctionnement sont sélectivement activables en fonction des données fournies par le dispositif 8 de détermination d'un paramètre représentatif de la position angulaire du bras 91.The nacelle 1 also has two operating modes, one called operating mode in work configuration, the other called operating mode in transport configuration. These operating modes can be selectively activated depending on the data provided by the device 8 for determining a parameter representative of the angular position of the arm 91.

L'unité 10 de pilotage est configurée pour commander l'activation du mode de fonctionnement en configuration transport lorsque, le bras 91 est dans la position extrême basse telle que définie ci-dessus.The control unit 10 is configured to control the activation of the operating mode in transport configuration when the arm 91 is in the extreme low position as defined above.

L'unité 10 de pilotage est configurée pour commander l'activation du mode de fonctionnement en configuration travail lorsque le bras 91 passe de la position extrême basse à une autre position. L'activation de l'un ou l'autre des modes de fonctionnement s'opère donc automatiquement.The control unit 10 is configured to control the activation of the operating mode in work configuration when the arm 91 moves from the extreme low position to another position. The activation of one or other of the operating modes therefore takes place automatically.

Les modes de fonctionnement en configuration travail et en configuration transport sont définis chacun au moins par une vitesse maximale de déplacement au sol du châssis 6 automoteur.The operating modes in work configuration and in transport configuration are each defined at least by a maximum ground travel speed of the self-propelled chassis 6.

En pratique, généralement, dans le mode de fonctionnement en configuration travail, la vitesse maximale de déplacement au sol du châssis 6 de la nacelle 1 est de l'ordre de 0,6 km/h , tandis que dans le mode de fonctionnement en configuration transport, la vitesse maximale de déplacement au sol du châssis 6 de la nacelle peut être égale au moins à 5km/h .In practice, generally, in the operating mode in work configuration, the maximum ground travel speed of the chassis 6 of the nacelle 1 is of the order of 0.6 km/h, while in the operating mode in transport configuration, the maximum ground travel speed of the chassis 6 of the nacelle can be at least 5 km/h.

On note donc que la vitesse maximale de déplacement du châssis 6 automoteur dans le mode de fonctionnement en configuration travail est inférieure à la vitesse maximale de déplacement du châssis 6 automoteur dans le mode de fonctionnement en configuration transport pour éviter tout risque d'accident lorsque le bras est en position haute, c'est-à-dire dans le mode de fonctionnement en configuration travail. En effet, il existerait, en cas de vitesse élevée dans ce mode de fonctionnement, un risque d'une expulsion de l'opérateur du panier 2.It is therefore noted that the maximum travel speed of the self-propelled chassis 6 in the working configuration operating mode is lower than the maximum travel speed of the self-propelled chassis 6 in the transport configuration operating mode to avoid any risk accident when the arm is in the high position, i.e. in the working configuration operating mode. In fact, in the event of high speed in this operating mode, there would be a risk of the operator being ejected from the basket 2.

Pour parfaire l'ensemble, la nacelle 1 comprend au moins un dispositif 11 d'amortissement des mouvements d'oscillation en monte-et-baisse du panier 2, ces mouvements d'oscillation étant aptes à se produire en particulier lorsque le châssis 6 roulant se déplace au sol sur un terrain irrégulier. Il existe un risque d'expulsion de l'opérateur du panier 2 si ces mouvements sont d'amplitude trop importante. En outre, ces oscillations sollicitent énormément l'opérateur qui doit amortir ces mouvements avec ses genoux en se maintenant constamment en flexion. Il en résulte une fatigue musculaire de l'opérateur.To complete the assembly, the nacelle 1 comprises at least one device 11 for damping the oscillation movements of the basket 2 when moving up and down, these oscillation movements being capable of occurring in particular when the rolling chassis 6 moves on the ground over uneven terrain. There is a risk of the operator being expelled from the basket 2 if these movements are of too great an amplitude. In addition, these oscillations place a great deal of strain on the operator, who must dampen these movements with his knees by constantly remaining flexed. This results in muscular fatigue for the operator.

Ce dispositif 11 d'amortissement est un dispositif activable/désactivable qui est disposé entre l'emplacement 5 de réception de l'opérateur dans le panier 2 et l'extrémité supérieure du bras 91. Ce dispositif 11 d'amortissement peut affecter un grand nombre de formes.This damping device 11 is an activatable/deactivatable device which is arranged between the location 5 for receiving the operator in the basket 2 and the upper end of the arm 91. This damping device 11 can affect a large number of shapes.

Dans les exemples représentés, le dispositif 11 d'amortissement comprend au moins un vérin 12 hydraulique, comme dans l'exemple représenté à la figure 2, ou plusieurs vérins hydrauliques en parallèle comme illustré aux figures 6 et 7.In the examples shown, the damping device 11 comprises at least one hydraulic cylinder 12, as in the example shown in figure 2 , or several hydraulic cylinders in parallel as illustrated in figures 6 And 7 .

Le ou chaque vérin 12 hydraulique comprend un corps 121 et un piston 122 apte à coulisser axialement à l'intérieur du corps et séparant ledit corps en deux chambres 123. Dans les exemples des figures 5 à 7, les chambres 123 sont reliées entre elles par un circuit 124 fluidique équipé d'un organe 125 d'obturation. Cet organe 125 d'obturation est ici formé par une électrovanne. Cet organe 125 d'obturation est monté mobile entre une position ouverte correspondant à l'état actif du dispositif d'amortissement 11 et une position fermée correspondant à l'état inactif ou désactivé du dispositif d'amortissement 11 dans laquelle le transfert de fluide entre lesdites chambres 123 est empêché. Chaque chambre renferme un organe 128 élastiquement déformable, tel qu'un ressort, de rappel du piston, en direction de l'autre chambre.The or each hydraulic cylinder 12 comprises a body 121 and a piston 122 capable of sliding axially inside the body and separating said body into two chambers 123. In the examples of figures 5 to 7 , the chambers 123 are connected to each other by a fluid circuit 124 equipped with a closure member 125. This closure member 125 is here formed by a solenoid valve. This closure member 125 is mounted to move between an open position corresponding to the active state of the damping device 11 and a closed position corresponding to the inactive or deactivated state of the damping device 11 in which the transfer of fluid between said chambers 123 is prevented. Each chamber contains an elastically deformable member 128, such as a spring, for returning the piston towards the other chamber.

Dans l'exemple représenté aux figures 6 et 7, le dispositif d'amortissement 11 comprend deux vérins 12 montés en parallèle et disposés chacun entre le plancher 4 et le fond 14 du panier 2. Dans ce mode de réalisation, le plancher 4 et le fond 14 sont montés mobiles dans le sens d'un rapprochement ou d'un écartement l'un de l'autre à l'état activé du dispositif d'amortissement 11.In the example shown in figures 6 And 7 , the damping device 11 comprises two jacks 12 mounted in parallel and each arranged between the floor 4 and the bottom 14 of the basket 2. In this embodiment, the floor 4 and the bottom 14 are mounted to move in the direction of moving towards or away from each other in the activated state of the damping device 11.

Le corps 121 de chaque vérin 12 du dispositif d'amortissement 11 est couplé au fond 14 du panier 2 et le piston 122 du vérin 12 est couplé au plancher 4. Le piston 122 de chaque vérin 12 est déplaçable axialement à l'intérieur du corps 121 à l'état entraîné en déplacement relatif du plancher 4 et du fond 14 dans le sens d'un rapprochement ou d'un écartement l'un de l'autre à l'état actif du dispositif d'amortissement 11. Ce déplacement axial du piston 122 est amorti par le passage du fluide d'une chambre à une autre du vérin. A l'état désactivé ou inactif du dispositif d'amortissement 11, correspondant à l'état fermé de l'organe 125 d'obturation, tout passage de fluide d'une chambre à une autre est empêché et le plancher 4 est alors fixe par rapport au fond 14 du panier 2.The body 121 of each cylinder 12 of the damping device 11 is coupled to the bottom 14 of the basket 2 and the piston 122 of the cylinder 12 is coupled to the floor 4. The piston 122 of each cylinder 12 is axially movable inside the body 121 in the driven state in relative displacement of the floor 4 and the bottom 14 in the direction of a move towards or away from each other in the active state of the damping device 11. This axial displacement of the piston 122 is damped by the passage of fluid from one chamber to another of the cylinder. In the deactivated or inactive state of the damping device 11, corresponding to the closed state of the closure member 125, any passage of fluid from one chamber to another is prevented and the floor 4 is then fixed relative to the bottom 14 of the basket 2.

Les figures 4 et 5 illustrent une autre possibilité de positionnement du dispositif d'amortissement 11. Dans ces figures, le dispositif d'amortissement 11 s'étend entre deux parties 161 et 162 du panier, lesdites parties du panier étant montées mobiles l'une par rapport à l'autre à l'état actif du dispositif d'amortissement 11. A nouveau, le corps du vérin du dispositif d'amortissement 11 est couplé à l'une des parties et le piston du vérin à l'autre partie.THE figures 4 And 5 illustrate another possibility of positioning the damping device 11. In these figures, the damping device 11 extends between two parts 161 and 162 of the basket, said parts of the basket being mounted to move relative to each other in the active state of the damping device 11. Again, the body of the cylinder of the damping device 11 is coupled to one of the parts and the piston of the cylinder to the other part.

Ainsi, l'une des parties, à savoir ici la partie 162 de panier est couplée à l'extrémité supérieure du bras 91 par la liaison 21 articulée, ladite liaison 21 articulée comprenant au moins une liaison à pivotement 18 d'axe dit vertical, ledit axe s'étendant orthogonalement au plancher 4 du panier 2 et le corps 121 du vérin 12 du dispositif d'amortissement 11 est couplé à ladite partie 162 de panier 2. Le piston 122 dudit vérin 12 est couplé à l'autre des parties de panier, à savoir la partie 161 de panier qui s'étend entre la partie 162 de panier décrite précédemment et le panier 2. Le piston 122 et le corps 121 du vérin 12 sont, à l'état actif du dispositif d'amortissement 11, montés mobiles l'un par rapport à l'autre à l'état entraîné en déplacement relatif desdites parties 161,162 de panier.Thus, one of the parts, namely here the basket part 162, is coupled to the upper end of the arm 91 by the articulated connection 21, said articulated connection 21 comprising at least one pivoting connection 18 of so-called vertical axis, said axis extending orthogonally to the floor 4 of the basket 2 and the body 121 of the jack 12 of the damping device 11 is coupled to said part 162 of basket 2. The piston 122 of said jack 12 is coupled to the other of the basket parts, namely the basket part 161 which extends between the basket part 162 described previously and the basket 2. The piston 122 and the body 121 of the jack 12 are, in the active state of the damping device 11, mounted to move relative to each other in the driven state in relative displacement of said parts 161,162 basket.

Ce déplacement relatif des parties 161 et 162 de panier correspond à un déplacement relatif des parties 161 et 162 de panier suivant une direction parallèle à l'axe de la liaison à pivotement 18 de l'une des parties de panier au bras 91.This relative displacement of the basket parts 161 and 162 corresponds to a relative displacement of the basket parts 161 and 162 in a direction parallel to the axis of the pivot connection 18 of one of the basket parts to the arm 91.

Indépendamment du mode de réalisation du dispositif d'amortissement, tel qu'illustré aux figures 4 à 7, l'unité 10 de pilotage est configurée pour commander le passage de l'organe 125 d'obturation de la position ouverte à la position fermée ou inversement en fonction de l'état actif ou inactif du dispositif 11 d'amortissement souhaité.Regardless of the embodiment of the damping device, as illustrated in figures 4 to 7 , the control unit 10 is configured to control the passage of the closure member 125 from the open position to the closed position or vice versa depending on the active or inactive state of the desired damping device 11.

L'unité 10 de pilotage est configurée pour commander l'activation ou la désactivation du dispositif 11 d'amortissement au moins en fonction des données fournies par le dispositif 8 de détermination d'un paramètre représentatif de la position angulaire du bras.The control unit 10 is configured to control the activation or deactivation of the damping device 11 at least as a function of the data provided by the device 8 for determining a parameter representative of the angular position of the arm.

En particulier, le dispositif d'amortissement 11 est à l'état actif dans le mode de fonctionnement en configuration transport de la nacelle et l'unité de pilotage est configurée pour commander la désactivation du dispositif d'amortissement 11, c'est-à-dire le passage du dispositif d'amortissement 11 de l'état actif à l'état inactif lorsque le bras 91 est écarté de la position extrême basse du fait d'une élévation par déplacement à pivotement en direction de la position extrême haute et/ou d'une sortie du télescope dans le cas d'un bras télescopique.In particular, the damping device 11 is in the active state in the operating mode in the transport configuration of the nacelle and the control unit is configured to control the deactivation of the damping device 11, that is to say the transition of the damping device 11 from the active state to the inactive state when the arm 91 is moved away from the extreme low position due to an elevation by pivoting movement towards the extreme high position and/or an extension of the telescope in the case of a telescopic arm.

Ainsi, le passage de la nacelle du mode de fonctionnement en configuration transport au mode de fonctionnement en configuration travail s'accompagne d'une désactivation du dispositif d'amortissement 11 et le passage de la nacelle du mode de fonctionnement en configuration travail au mode de fonctionnement en configuration transport s'accompagne d'une activation du dispositif d'amortissement 11. Le dispositif d'amortissement 11 peut être positionné en divers emplacements sur la nacelle 1.Thus, the transition of the nacelle from the operating mode in transport configuration to the operating mode in work configuration is accompanied by a deactivation of the damping device 11 and the transition of the nacelle from the operating mode in work configuration to the operating mode in transport configuration is accompanied by an activation of the damping device 11. The damping device 11 can be positioned in various locations on the nacelle 1.

Dans l'exemple représenté aux figures 2 et 3, le dispositif d'amortissement 11 s'étend entre l'extrémité supérieure du bras 91 et la structure 92 à parallélogramme déformable de la liaison 21 articulée de l'extrémité supérieure du bras 91 au panier. En effet, dans cet exemple, la nacelle 1 est du type dont l'extrémité supérieure du bras 91 d'entraînement en déplacement du panier 2 est couplée au panier par une liaison 21 articulée comprenant une structure 92 à parallélogramme déformable. La structure 92 à parallélogramme déformable est reliée à l'extrémité supérieure du bras 91 par une liaison pivot 13 d'axe pivot dit horizontal perpendiculaire à l'axe longitudinal du bras 91, et le ou au moins l'un des dispositifs d'amortissement 11 qui est un dispositif activable/désactivable disposé entre l'emplacement 5 de réception d'un opérateur du panier 2 et l'extrémité supérieure du bras 91 s'étend entre l'extrémité supérieure du bras 91 et la structure 92 à parallélogramme déformable.In the example shown in figures 2 And 3 , the damping device 11 extends between the upper end of the arm 91 and the deformable parallelogram structure 92 of the articulated connection 21 of the upper end of the arm 91 to the basket. Indeed, in this example, the nacelle 1 is of the type in which the upper end of the arm 91 for driving the basket 2 in movement is coupled to the basket by an articulated connection 21 comprising a deformable parallelogram structure 92. The deformable parallelogram structure 92 is connected to the upper end of the arm 91 by a pivot connection 13 with a so-called horizontal pivot axis perpendicular to the longitudinal axis of the arm 91, and the or at least one of the damping devices 11 which is an activatable/deactivatable device arranged between the location 5 for receiving an operator of the basket 2 and the upper end of the arm 91 extends between the upper end of the arm 91 and the structure 92 with a deformable parallelogram.

A nouveau, le dispositif 11 d'amortissement comprend un vérin 12 hydraulique avec un corps 121 et un piston 122 séparant ledit corps 121 en deux chambres 123. Le corps 121 du vérin 12 est couplé au bras 91 et le piston 122 du vérin 12 est couplé à la structure 92 à parallélogramme déformable. L'inverse est également possible. La structure 92 à parallélogramme déformable est montée mobile autour de l'axe pivot de la liaison pivot 13 couplant le bras 91 et la structure 92 à parallélogramme déformable à l'état entraîné en déplacement axial du piston 122 à l'intérieur du corps 121 et le dispositif d'amortissement 11 comprend un accumulateur 127 hydraulique réalisé ici sous forme d'un accumulateur à membrane en communication fluidique avec l'une des chambres 123 du vérin 12 par une liaison obturable ouverte à l'état actif du dispositif d'amortissement 11.Again, the damping device 11 comprises a hydraulic cylinder 12 with a body 121 and a piston 122 separating said body 121 into two chambers 123. The body 121 of the cylinder 12 is coupled to the arm 91 and the piston 122 of the cylinder 12 is coupled to the deformable parallelogram structure 92. The reverse is also possible. The deformable parallelogram structure 92 is mounted to move around the pivot axis of the pivot connection 13 coupling the arm 91 and the deformable parallelogram structure 92 in the driven state in axial displacement of the piston 122 inside the body 121 and the damping device 11 comprises a hydraulic accumulator 127 produced here in the form of a membrane accumulator in fluid communication with one of the chambers 123 of the cylinder 12 by a closable connection open in the active state of the damping device 11.

L'organe d'obturation de la liaison fluidique, représentée en 126, est à nouveau une électrovanne commandée en déplacement par l'unité de pilotage pour le passage de la liaison fluidique de l'état ouvert à l'état fermé. Ainsi, lorsque la liaison est ouverte, un amortissement est possible. La chambre 123 disposée côté fond du vérin peut permettre, par sa liaison fluidique avec l'accumulateur hydraulique, à l'état ouvert de la liaison, une évacuation du contenu de ladite chambre vers l'accumulateur hydraulique, cette énergie étant ensuite restituable.The shut-off member of the fluid connection, shown at 126, is again a solenoid valve controlled in displacement by the control unit for the transition of the fluid connection from the open state to the closed state. Thus, when the connection is open, damping is possible. The chamber 123 arranged on the bottom side of the cylinder can allow, by its fluid connection with the hydraulic accumulator, in the open state of the connection, an evacuation of the contents of said chamber towards the hydraulic accumulator, this energy then being restitutable.

Dans ce mode de réalisation, où ladite structure 92 à parallélogramme déformable est présente, le panier 2 est couplé à la structure 92 à parallélogramme déformable par une liaison à pivotement 18 d'axe dit vertical, ledit axe s'étendant orthogonalement au plancher 4.In this embodiment, where said deformable parallelogram structure 92 is present, the basket 2 is coupled to the deformable parallelogram structure 92 by a pivoting connection 18 with a so-called vertical axis, said axis extending orthogonally to the floor 4.

On note que dans l'exemple représenté, le vérin 12 présente un corps 121 et un piston 122 communs avec l'actionneur esclave décrit ci-dessus. Le piston 122 du vérin 12 peut se déplacer axialement à l'intérieur du corps 121 sous l'effet d'un déplacement de l'actionneur maître lui-même entraîné en déplacement sous l'action du vérin de levage. Il en résulte une simplicité de la construction.It is noted that in the example shown, the cylinder 12 has a body 121 and a piston 122 common with the slave actuator described above. The piston 122 of the cylinder 12 can move axially inside the body 121 under the effect of a movement of the master actuator itself driven in movement under the action of the lifting cylinder. This results in simplicity of construction.

Enfin, la nacelle peut comprendre un organe 17 d'activation forcée du dispositif 11 d'amortissement. Cet organe 17 d'activation est un organe d'activation à actionnement manuel pour commander de manière forcée le passage de l'état inactif à l'état actif du dispositif d'amortissement 11 à l'état sollicité dudit organe 17 d'activation. Cet organe 17 d'activation peut être disposé au niveau du poste 3 de pilotage et être formé par un bouton.Finally, the nacelle may comprise a member 17 for forced activation of the damping device 11. This activation member 17 is a manually actuated activation member for forcibly controlling the transition from the inactive state to the active state of the damping device 11 to the stressed state of said activation member 17. This activation member 17 may be arranged at the level of the cockpit 3 and be formed by a button.

Indépendamment de la position du dispositif d'amortissement 11 sur la nacelle 1, le fonctionnement est toujours similaire. Au démarrage du moteur de la nacelle 1, le mode de fonctionnement en configuration transport est activé et le dispositif d'amortissement 11 est à l'état actif, c'est-à-dire que l'organe d'obturation 125 ou 126 est en position ouverte. L'unité de pilotage reçoit en entrée les données du dispositif 8 de détermination d'un paramètre représentatif de la position angulaire du bras et les traite. Lorsqu'il résulte du traitement des données que le bras 91 n'est plus en position extrême basse, et est donc dans une position autre que la position extrême basse, le mode de fonctionnement en configuration travail est activé et le dispositif d'amortissement 11 est désactivé, c'est-à-dire rendu inactif, par fermeture de l'organe 125 ou 126 d'obturation. Ces conditions sont maintenues jusqu'à ce que le traitement des données fournies par le dispositif 8 de détermination d'un paramètre représentatif de la position angulaire à l'unité de pilotage du bras corresponde au cas où le bras 91 est de nouveau en position extrême basse. L'unité 10 de pilotage commande alors à nouveau l'activation du mode de fonctionnement en configuration de transport et l'activation du dispositif d'amortissement 11. Bien évidemment, dans chaque mode de fonctionnement de la nacelle 1, la vitesse maximale de déplacement du châssis 6 automoteur est adaptée et contrôlée par l'unité 10 de pilotage.Regardless of the position of the damping device 11 on the nacelle 1, the operation is always similar. When the engine of the nacelle 1 is started, the operating mode in transport configuration is activated and the damping device 11 is in the active state, i.e. the closure member 125 or 126 is in the open position. The control unit receives as input the data from the device 8 for determining a parameter representative of the angular position of the arm and processes them. When it results from the processing of the data that the arm 91 is no longer in the extreme low position, and is therefore in a position other than the extreme low position, the operating mode in work configuration is activated and the damping device 11 is deactivated, i.e. made inactive, by closing the closure member 125 or 126. These conditions are maintained until the processing of the data supplied by the device 8 for determining a parameter representative of the angular position to the arm control unit corresponds to the case where the arm 91 is again in the extreme low position. The control unit 10 then again commands the activation of the operating mode in transport configuration and the activation of the damping device 11. Obviously, in each operating mode of the nacelle 1, the maximum speed of movement of the self-propelled chassis 6 is adapted and controlled by the control unit 10.

Claims (13)

  1. Aerial lift (1) for persons working at height, said aerial lift (1) comprising:
    - a working platform (2) comprising a control station (3) and a deck (4) at least partially surmounted by a location (5) for receiving an operator,
    - an automotive chassis (6),
    - an arm (91) for moving the working platform (2), one of the ends of which, referred to as lower end, is pivotably connected to the chassis (6) for an angular movement of the arm between a lowermost position close to the ground and an uppermost position away from the ground, and the opposite end of which, referred to as upper end, is coupled directly or by an articulated connection (21) to the working platform (2),
    - a device (8) for determining a parameter representative of the angular position of the arm (91), and
    - a control unit (10) configured to acquire data from the device (8) for determining a parameter representative of the angular position of the arm (91),
    - said aerial lift (1) having at least two selectively activatable operating modes: an operating mode, referred to as transport configuration operating mode, in which the arm (91) is in the lowermost position and an operating mode, referred to as working configuration operating mode, activated when the arm (91) occupies a position other than the lowermost position, the control unit (10) being configured to command activation of one or the other of the operating modes of the aerial lift (1) at least on the basis of the data provided by the device (8) for determining a parameter representative of the angular position of the arm (91), the working configuration and transport configuration operating modes each being defined at least by a maximum speed of movement of the automotive chassis (6), the maximum speed of movement of the automotive chassis (6) in the working configuration operating mode being lower than the maximum speed of movement of the automotive chassis (6) in the transport configuration operating mode, characterized in that the aerial lift (1) comprises at least one damping device (11) for damping upward and downward oscillating movements of the deck (4) of the working platform (2), in that this damping device (11) is an activatable/deactivatable device arranged between the location (5) for receiving an operator of the working platform (2) and the upper end of the arm (91), and in that the control unit (10) is configured to command the activation or deactivation of the damping device (11) at least on the basis of the data provided by the device for determining a parameter representative of the angular position of the arm (91).
  2. Aerial lift (1) according to Claim 1, characterized in that the damping device (11) is in the active state when the aerial lift (1) is in the transport configuration operating mode, and the control unit (10) is configured to command the deactivation of the damping device (11) in the activated state when the aerial lift (1) is in the working configuration operating mode.
  3. Aerial lift (1) according to either of Claims 1 and 2, characterized in that the or at least one of the damping devices (11) comprises at least one hydraulic cylinder (12), the or at least one of the cylinders comprising a body (121) and a piston (122), the body (121) and the piston (122) being able to move with respect to one another, said piston (122) separating said body (121) into two chambers (123).
  4. Aerial lift (1) according to Claim 3, characterized in that the two chambers (123) are connected to one another by a fluidic circuit (124) equipped with a closure unit (125) mounted so as to be able to move between an open position corresponding to the active state of the damping device (11) and a closed position, corresponding to the inactive state of the damping device (11), in which any transfer of fluid between said chambers (123) is prevented, each chamber (123) housing at least one elastically deformable member (128) for returning the piston (122) towards the other chamber (123).
  5. Aerial lift (1) according to one of Claims 1 to 4, characterized in that the working platform (2) comprises a bottom (14) and side walls (15) surrounding said bottom (14), in that the deck (4) extends above said bottom (14), and in that the or at least one of the damping devices (11), which is an activatable/deactivatable device arranged between the location (5) for receiving an operator of the working platform (2) and the upper end of the arm (91), extends at least partially between the deck (4) and the bottom (14) of the working platform (2), the deck (4) and the bottom (14) being mounted so as to be able to move towards or away from one another when the damping device (11) is in the active state.
  6. Aerial lift (1) according to Claim 5 in combination with either of Claims 3 and 4, characterized in that the body (121) of the cylinder (12) of the damping device (11) is coupled to the bottom (14) of the working platform (2), and the piston (122) of said cylinder (12) is coupled to the deck (4) or vice versa, and in that the piston (122) and the body (121) are mounted so as to be able to move with respect to one another when the deck (4) and the bottom (14) are moved relative to one another, towards or away from one another, when the damping device (11) is in the active state.
  7. Aerial lift (1) according to one of Claims 1 to 6, characterized in that the or at least one of the damping devices (11), which is an activatable/deactivatable device arranged between the location (5) for receiving an operator of the working platform (2) and the upper end of the arm (91), extends between two parts (161, 162) of the working platform (2), and in that said parts (161, 162) of the working platform (2) are mounted so as to be able to move with respect to one another when the damping device (11) is in the active state.
  8. Aerial lift (1) according to Claim 7 in combination with either of Claims 3 and 4, characterized in that one of the parts (161, 162) of the working platform is coupled to the upper end of the arm (91) by the articulated connection (21) coupling the upper end of the arm (91) to the working platform (2), this articulated connection (21) comprising at least one pivot connection (18) with an axis referred to as vertical axis, said axis extending orthogonally to the deck (4), and in that the body (121) of the cylinder (12) of the damping device (11) is coupled to one of the parts of the working platform (2) and the piston (122) of said cylinder (12) is coupled to the other of the parts of the working platform, and in that the piston (122) and the body (121) are, when the damping device (11) is in the active state, mounted so as to be able to move with respect to one another when said parts (161, 162) of the working platform are moved relative to one another.
  9. Aerial lift (1) according to one of Claims 1 to 3, characterized in that the aerial lift (1) is of the type in which the upper end of the arm (91) for moving the working platform (2) is coupled to the working platform (2) by an articulated connection (21) comprising at least one deformable parallelogram structure (92), the deformable parallelogram structure (92) is connected to the upper end of the arm (91) by a pivot connection (13) with a pivot axis, referred to as horizontal pivot axis, perpendicular to the longitudinal axis of the arm (91), and in that the or at least one of the damping devices (11), which is an activatable/deactivatable device arranged between the location (5) for receiving an operator of the working platform (2) and the upper end of the arm (91), extends between the upper end of the arm (91) and the deformable parallelogram structure (92).
  10. Aerial lift (1) according to Claim 9, characterized in that the or at least one of the damping devices (11) comprises at least one hydraulic cylinder (12) with a body (121) and a piston (122) separating said body (121) into two chambers (123), the body (121) of the cylinder (12) is coupled to the arm (91) and the piston (122) of said cylinder (12) is coupled to the deformable parallelogram structure (92) or vice versa, in that the deformable parallelogram structure (92) is mounted so as to be able to move about the pivot axis of the pivot connection (13) coupling the arm (91) and the deformable parallelogram structure (92) when the piston (122) is moved axially inside the body (121), and in that the damping device (11) comprises a hydraulic accumulator (127) in fluidic communication with one of the chambers (123) of the cylinder (12) via a closable connection that is open when the damping device (11) is in the active state.
  11. Aerial lift (1) according to one of Claims 1 to 10, characterized in that the device (8) for determining a parameter representative of the angular position of the arm (91) comprises at least one inductive sensor for detecting the lowermost position of the arm (91).
  12. Aerial lift (1) according to one of Claims 1 to 11, characterized in that said aerial lift (1) comprises a member (17) for forced activation of the damping device (11), this forced activation member (17) being a manually actuated activation member for forcibly commanding the damping device (11) to pass from the inactive state to the active state when said activation member (17) is in the loaded state.
  13. Aerial lift (1) according to one of Claims 1 to 12, characterized in that, when the upper end of the arm (91) is coupled to the working platform (2) by an articulated connection (21) comprising at least one deformable parallelogram structure (92), the working platform (2) is coupled to the deformable parallelogram structure (92) by a pivot connection (18) with an axis referred to as vertical axis, said axis extending orthogonally to the deck (4).
EP22835092.2A 2021-12-09 2022-12-02 Aerial lift for persons working at height Active EP4444651B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2113198A FR3130263B1 (en) 2021-12-09 2021-12-09 Aerial platform for lifting people
PCT/FR2022/052223 WO2023105141A1 (en) 2021-12-09 2022-12-02 Aerial lift for persons working at height

Publications (3)

Publication Number Publication Date
EP4444651A1 EP4444651A1 (en) 2024-10-16
EP4444651B1 true EP4444651B1 (en) 2025-09-17
EP4444651C0 EP4444651C0 (en) 2025-09-17

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP22835092.2A Active EP4444651B1 (en) 2021-12-09 2022-12-02 Aerial lift for persons working at height

Country Status (3)

Country Link
EP (1) EP4444651B1 (en)
FR (1) FR3130263B1 (en)
WO (1) WO2023105141A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2062258B (en) * 1979-11-01 1983-11-16 Simon Eng Dudley Ltd Safe load indicator
US4653654A (en) * 1984-04-05 1987-03-31 Fmc Corporation Hydraulic crane aerial platform attachment
GB2560328B (en) * 2017-03-07 2021-12-15 Niftylift Ltd Base unit for a vehicle
FR3078062B1 (en) 2018-02-16 2020-02-21 Manitou Bf LIFT PLATFORM FOR LIFTING PEOPLE AND WORKING AT THE HEIGHT OF SAID PEOPLE

Also Published As

Publication number Publication date
EP4444651A1 (en) 2024-10-16
FR3130263B1 (en) 2023-11-03
EP4444651C0 (en) 2025-09-17
FR3130263A1 (en) 2023-06-16
WO2023105141A1 (en) 2023-06-15

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