EP3386901B1 - Control station for work platform of an aerial lift - Google Patents
Control station for work platform of an aerial lift Download PDFInfo
- Publication number
- EP3386901B1 EP3386901B1 EP16819975.0A EP16819975A EP3386901B1 EP 3386901 B1 EP3386901 B1 EP 3386901B1 EP 16819975 A EP16819975 A EP 16819975A EP 3386901 B1 EP3386901 B1 EP 3386901B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cover
- console
- control station
- longitudinal element
- control
- 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.)
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Images
Classifications
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- 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
- 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
- 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
- B66F11/046—Working platforms suspended from booms of the telescoping type
-
- 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
- B66F9/07513—Details concerning the chassis
- B66F9/07527—Covers for, e.g. engines or batteries
-
- 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
- B66F9/0759—Details of operating station, e.g. seats, levers, operator platforms, cabin suspension
Definitions
- the present invention relates to the field of mobile lifting platforms for personnel (also known by the acronym PEMP) also commonly called lifting platforms. It relates more particularly to the control station arranged on the working platform of the lifting lifts.
- PEMP mobile lifting platforms for personnel
- Lifting cradles are machines designed to allow one or more people to work at height.
- they include a work platform designed to receive people.
- the working platform is supported by a lifting mechanism which allows it to be raised from a lowered position on the chassis of the lifting platform to the desired working position in height.
- the lifting mechanism may include an articulated and / or telescopic mast at the end of which is mounted the platform and hydraulic jacks to deploy it relative to the chassis.
- the lifting mechanism is often arranged on a turret which is pivotally mounted on the chassis, which makes it possible to change the orientation of the lifting mechanism - and therefore of the platform - relative to the chassis.
- the chassis is generally equipped with wheels or tracks making it possible to move the lifting platform to the ground. It is most often motorized to allow an autonomous movement on the ground of the lifting platform.
- the platform is equipped with a control station allowing an operator on board the platform to cause the movement of the platform to reach the desired working position. It includes for this a console provided with control members allowing the operator to actuate the lifting mechanism, even the pivoting of the turret and possibly also the movement of the nacelle on the ground.
- WO 2011/015815 A1 teaches to mount the control console to the railing with a possibility of pivoting against return springs.
- the crushing of the operator against the console causes it to pivot against the return springs and a proximity sensor detects the pivoting to stop the movement of the platform.
- a disadvantage of this solution is related to the fact that the operator can exert in normal times significant forces on the console for example by retaining the control members to avoid being unbalanced by the movements of the platform.
- the return springs must have a high stiffness. Consequently, the crushing is detected only if the force of crushing of the operator against the desk is very important which risks thereby being injured.
- control station generally includes a protective cover which can be folded down on the control console. When open, it allows the operator to access the control elements of the control console. When closed, it covers the control panel to protect the control elements as well as any signaling devices and the instructions affixed to the control panel against dirt and shocks during work carried out by persons on board the platform.
- a control station comprising a protective cover is disclosed by JP H05 124800 A which corresponds to the preamble of claim 1.
- the cover when the cover is closed, it generally does not cover the safety bar which extends above the protective cover and remains exposed to shocks during work on board the platform.
- the presence of the safety bar above the protective cover generally hinders the handling of the protective cover to move it between the open and closed position.
- the object of the present invention is to at least partially overcome the aforementioned drawbacks.
- the invention aims more particularly to ensure that the safety bar, or other element fulfilling the same function, is less hindering the handling of the protective cover of the control console when it is opened or closed, and is less exposed to shocks during work carried out by people on board the work platform.
- the control station When installed on board the working platform of an aerial work platform, the control station is provided to order the movement of the working platform. More precisely, when the cover is in the open position, it allows an operator standing in front of the control desk - that is to say in front of the front side thereof - to manipulate the control members to move the platform -work form.
- the longitudinal element is then positioned between it and the control desk without preventing the operator from handling and seeing the control members. In this way, if the operator is struck from behind by an obstacle to which he did not pay attention when moving the work platform, he will be pushed towards the desk and therefore come to press on the longitudinal element which it then urges towards the console.
- the thrust exerted by the operator on the longitudinal element is detected by the detection means.
- control station In cooperation with the control circuit of the various means of moving the platform, they can then cause, for example, the stopping of the movement in progress of the platform in order to avoid crushing of the operator against the desk. and possibly trigger a light and / or audible alarm signal.
- detection threshold appropriately to usefully protect the operator from being overwritten.
- control station is designed so that the external thrust of the longitudinal element towards the console - which is detected by the means of detection to protect the operator against the risk of crushing - does not cause the cover to close. It suffices for this that the closing of the cover is done by an external stress in a different direction.
- the cover when the cover is in the closed position, it protects the control panel against dirt and shocks. Since it moves together with the protective cover between the first and second positions, the longitudinal element is no longer in the projecting position relative to the front side of the control console when the cover is closed, but in a position away. This is acceptable because it is not useful that the operator's crush protection against the desk is active in this case.
- the cover when the cover is closed, the operator generally does not have access to the console control members. This situation therefore does not correspond to a phase of maneuvering of the platform by an operator on board it. However, this situation may correspond to a phase of work carried out by the people on board the platform which is stopped. Due to its positioning away, the longitudinal element is less exposed to shocks during work carried out by people on board the platform. Furthermore, the manipulation of the cover to move it from the open position to the closed position and vice versa is no longer hampered or less due to their joint movement.
- the longitudinal member can be rigid. In this case, it can advantageously serve as a means of gripping the cover to move it between the open and closed positions. It is preferably straight, but it can have a different shape, for example arched.
- the longitudinal element can also be flexible, for example in the form of a cord stretched between two side bars fixedly arranged on the protective cover, the detection means operating with respect to the tension applied to the cord similar to the technology disclosed in EP 2,096,078 A1 .
- the control station is preferably designed and intended to be installed on board the working platform of a lifting platform so that an operator can manipulate and see the controls of the control console when standing upright standing in front of the control console and the protective cover is open. It will also be understood that the control station is preferably designed so that in the aforementioned position of the cover and of the operator in front of the desk, it is with the bust or the waist that the operator pushes on the longitudinal element when it is pushed towards the desk by an obstacle striking it from the rear.
- the operator is understood to be a normally proportioned reference person with a height chosen between 1.70 m and 1.90 m.
- the longitudinal element when the cover is in the second position, the longitudinal element is arranged to move towards the rear side of the console when subjected to an external urge to push towards the console, the detection means operating by detecting the displacement of the longitudinal element towards the rear side of the console.
- This displacement of the longitudinal element makes it possible to limit or eliminate the crushing force applied to the operator when it is struck from behind by an obstacle during the movement of the platform.
- the detection of the displacement of the longitudinal element is simple to implement, for example using a position sensor of any suitable technology: roller contactor, inductive sensor, optical sensor, etc.
- the detection means operate by detecting the displacement of the longitudinal element beyond a predetermined position towards the rear side of the desk, the longitudinal element being able to move towards the rear side of the desk beyond this predetermined position.
- the over-displacement of the longitudinal element beyond this predetermined position limits the force applied to the operator in the event that despite the stop command caused by the detection means, the platform continues to move by inertia effect.
- the detection means operate by detection of exceeding the threshold of the external urging force from the longitudinal element towards the console.
- the detection threshold appropriately to usefully protect the operator from being overwritten. It is preferably fixed at a value less than or equal to 40 daN and even more preferably less than or equal to 20 daN.
- the detection threshold is high enough to avoid inadvertent triggering of the detection means in the event of the operator's involuntary action on the longitudinal element in the absence of risk of crushing. It is chosen in consideration in particular of the fact that the detection means operate with respect to a displacement of the longitudinal element or not, as well as the importance and the methods of its displacement if necessary. If they do not operate relative to a displacement of the longitudinal element, the detection threshold is preferably fixed at least 10 daN.
- the longitudinal element when the cover is in the second position, the longitudinal element is held in position vis-à-vis an external urging urge of the latter towards the music rest to a given level of pushing force beyond which the longitudinal member moves to the rear side of the music rest.
- This displacement of the longitudinal element makes it possible to limit or eliminate the crushing force applied to the operator when it is struck from behind by an obstacle during the movement of the platform.
- This maintenance in position makes it possible to avoid inadvertent triggering of the detection means in the event of the operator's involuntary action on the longitudinal element in the absence of risk of crushing.
- a person skilled in the art chooses this given level of pushing force appropriately to usefully protect the operator from being crushed.
- the detection means operate by detection of exceeding the threshold of the external urging force from the longitudinal element towards the console independently of the displacement of the longitudinal element towards the rear of the console, it is preferable to coordinate the detection threshold and the level of thrust force given so as to effectively fulfill the operator's safety role.
- the detection threshold is chosen to be lower than the given thrust force level so that the detection means trigger and cause the movement of the platform to stop before the movement of the longitudinal element.
- This case may correspond to a longitudinal element produced in the form of a rigid bar sensitive to the force as disclosed in GB 2 481 709 A which can be arranged for example fixedly on the protective cover, the latter being mounted displaceable towards the rear side of the console to provide the ability to move the bar in this direction.
- the longitudinal element is thus held in position by return means developing a return effort, preferably elastic, of the longitudinal element throughout its movement towards the rear side of the desk. Therefore, when the external thrust stress of the longitudinal element ceases, it is returned to its rest position.
- the detection means to operate by detecting the displacement of the longitudinal element beyond a predetermined position towards the rear side of the desk and that, on the one hand, the distance measured online. right between the predetermined position of detection of the displacement of the longitudinal element and the position of the longitudinal element in the absence of external urging urge towards the desk on it - i.e. its rest position - when the cover is in the second position, either greater than or equal to 2 cm, and, on the other hand, that the pushing force required to move the longitudinal element to its predetermined detection position is less than or equal to 10 daN.
- the pushing force required to move the longitudinal element to its predetermined detection position is chosen to be greater than or equal to 2 daN to avoid excessive trigger sensitivity, in particular with regard to acceleration of the platform.
- the pushing force required to move the longitudinal element up to at its predetermined detection position is preferably chosen at least 10 daN.
- the displacement of the cover between the first position and the second position is effected by tilting or even more precisely by pivoting. This allows a separation of the longitudinal element particularly adapted to protect it from shocks and dirt when the cover is in the closed position.
- the swivel mounting is particularly reliable and simple to implement.
- the longitudinal element is fixedly arranged on the cover.
- This embodiment is particularly advantageous regardless of the advantage of setting aside the longitudinal element to protect it from impacts and dirt when the cover is closed. Indeed, it simplifies the mounting of the cover and of the longitudinal element on or around the control console since it makes it possible to do without mounting elements specific to the longitudinal element for this purpose and its fixed arrangement at the hood is simple to implement.
- the longitudinal element is movable towards the rear side of the desk, it avoids the risk of interference between the longitudinal element or of the elements supporting it - as well as of the operator's fingers if he holds these - with the cover since they then move together.
- the detection means operate by detecting the displacement of the longitudinal element towards the rear side of the desk, it will be understood that this detection can be implemented with any suitable sensor cooperating with the cover to detect the displacement of the latter since the two move together, which is advantageously simple to implement.
- the longitudinal element is the front edge of the cover, or a bar arranged on the cover at a distance from the front edge of the cover to define at least one free space between the bar and the front edge of the cover.
- cover it being specified that the front edge of the cover is the edge of the cover located towards the front side of the console when the cover is in the second position.
- the cover may have a area adjacent to the front edge which is made of transparent or translucent material through which the console control members are visible when the cover is in the second position. Provision may also be made for the console control members to be visible through the at least one free space between the bar and the front edge of the cover when the cover is in the second position.
- the cover may be mounted relative to the console by a pivoting and sliding connection for moving the cover, on the one hand, by pure pivoting between the first position and the second position, and, on the other hand , by sliding towards the rear side of the console from the second position of the cover when the longitudinal element is subjected to an external urging urge towards the console.
- a pivoting and sliding connection for moving the cover, on the one hand, by pure pivoting between the first position and the second position, and, on the other hand , by sliding towards the rear side of the console from the second position of the cover when the longitudinal element is subjected to an external urging urge towards the console.
- FIG. 1 illustrates a lifting platform whose working platform 10 is equipped with a control station 20 according to the invention.
- the lifting platform comprises a chassis 2 equipped with wheels 6 for moving it on the ground.
- the chassis 2 is equipped with tracks for the same purpose.
- the chassis 2 is preferably motorized to ensure the autonomous movement of the lifting platform on the ground.
- the platform 10 is designed to receive one or more people on board, as well as the tools and materials useful for work to be carried out at height. It is supported by a lifting mechanism 8 to raise it from a lowered position on the chassis 2 of the lifting platform to the desired working position in height.
- a lifting mechanism 8 to raise it from a lowered position on the chassis 2 of the lifting platform to the desired working position in height.
- it comprises an articulated and telescopic mast at the end of which is mounted the platform 10 and hydraulic jacks for deploying it relative to the chassis 2.
- the lifting mechanism 8 is arranged on a motorized turret 4 allowing the rotate about a vertical axis relative to the chassis 2. The turret 4 thus makes it possible to change the orientation of the lifting mechanism 8 - and therefore of the platform 10 - relative to the chassis 2.
- the control station 20 allows an operator O on board the platform 10 to cause the movement of the platform 10 to reach the desired working position. It can thus actuate the lifting mechanism 8 and the pivoting of the turret 4. It can be provided that it can also cause the displacement of the lifting platform on the ground.
- a control station according to the invention can be mounted on the working platform of lifting lifts having a different constitution, for example which have another type of lifting mechanism 8 or which are devoid of turret 4 in which case the lifting mechanism is mounted directly on the chassis.
- the figure 2 shows the working platform 10. It includes a ground 12 surrounded by a body-guard 14. An opening 17 between two uprights 17a, 17b of the body-guard 14 allows people to access the platform 10.
- the control station 20 includes a protective cover 40.
- the cover 40 is shown in the closed position while it is shown in the open position on the figure 4 .
- the control station 20 includes a control console 22 visible on the Figures 4 and 5 . It is equipped with control members 24 intended to be manipulated by the operator O to allow him to move the platform 10 to the desired position for working at height.
- the control desk 22 is preferably mounted fixedly with respect to the railing 14. In this case, it is mounted on support plates 74 welded to a bar 70 which is fixed to two vertical uprights 18a, 18b of the guardrail 14 by means of a respective intermediate piece 70a, 70b.
- the passage between the open and closed positions of the cover 40 is made by pivoting around a fictitious axis parallel to the front edge of the control console 22.
- the front edge of the console 22, as well as its front side, are conventionally defined as being those corresponding to the side of the console in front of which the operator O stands on board the platform 10 for manipulating the control members 24.
- the rear side of the console 22 is the opposite side and which is generally towards the outside of the platform 10.
- the cover 40 When the cover 40 is closed, it covers the control panel 22 and protects it against dirt and shocks during work carried out by the people on board the platform 10. In this position, the control members 24 are not not accessible to the operator O. Consequently, he does not have the possibility of moving the platform 10.
- a bar 42 is fixedly arranged on the cover 40. It can for example be made in one piece with the cover 42 by molding of plastic or composite material or be attached to the cover 40 by any suitable means such as screwing or welding depending on the material of the cover 40.
- the bar 42 is in this case straight and extends horizontally and at a distance from the front edge of the cover 40 while being parallel to the latter.
- the bar 42 is continued at its ends by two uprights giving an overall U shape and serving to arrange the bar 42 to the cover 40.
- an upright can be arranged centrally at the bar 42 to give an overall T-shape, the bar 42 being arranged on the cover 40 by means of this upright.
- the bar 42 may have a generally arcuate shape and be arranged directly on the cover 40 by its two opposite ends.
- the bar 42 acts as a safety bar against the crushing of the operator on the desk 22. It is then parallel to the front edge of the desk 22 and extends all along the front edge the console 22 at a distance therefrom. It projects from the front side of the desk 22 in this case above the desk 22. It is thus positioned between the bust of the operator O and the desk 22 as can be seen on the figure 7 .
- the space between the front edge of the cover 40 and the bar 42 is free of material, which allows the operator O to see the control members 24 when the cover 40 is open. The operator O accesses the control members 24 by passing their hands below the bar 42.
- the figure 8 illustrates the actuation of the bar 42 by the bust of the operator O which is pushed - cf. arrow F 2 - towards the desk 22 by an obstacle C striking it from the rear when the platform 10 is displaced in accordance with arrow F 1 .
- the force exerted on the bar 42 if it exceeds a given level, has the effect of moving the cover 40 towards the rear side of the desk 22 and this movement is detected to automatically stop the movement in progress of the platform 10 in order to protect the operator O from being crushed against the console 22.
- the Figures 9 to 13 illustrate the mounting of the cover 40 relative to the railing 14. More particularly, the cover 40 is mounted on each lateral side to a vertical support 30 arranged fixed with respect to the railing 14.
- the Figures 9 to 13 show its mounting for a lateral side, it being specified that it is identical for the other lateral side of the cover 40.
- a cover 38 covering the support 30 has been omitted in these figures in order to show the mounting detail.
- This cover is preferably screwed onto the support 30, for example at the points 36 and the stud 32 visible on the figure 13 .
- the lateral support 30 is in this case welded to the bar 70.
- the lateral supports 30 are arranged perpendicular to the front edge of the desk 22 and are mutually parallel.
- the cover 40 has on each lateral side a pin 44.
- the two pins 44 are coaxial around a fictitious axis which is parallel to the bar 42.
- Each pin 44 is inserted into a slot 34 formed in the corresponding vertical support 30.
- the two slots 34 are parallel to each other and extend towards the rear side of the desk 22. Their dimensioning is suitable to allow both the pivoting and the sliding of the pins 44 in the slots 34.
- the pins 44 are elastically biased towards the 'front end of the slots 34. In this case, the elastic stress is produced by means of a respective tension spring 60, one end of which is linked to the pin 44 and the other is fixed to the stud 32 of the support 30.
- the cover 40 rests by gravity in abutment on a horizontal bar 16 of the railing 14, in this case by grooves 46 formed in the lateral parts of the cover 40.
- the grooves 46 in cooperation with the bar 16 also exclude that the cover 40 can be accidentally pushed back towards the rear side of the console 22.
- the bar 42 is positioned downward, at a level below the console 22 and backward with respect to the front edge of the cover 40. The bar 42 is thus protected against dirt and shocks during work carried out by people on board platform 10.
- the operator O rotates it in the direction indicated by the arrow F3, that is to say by tilting the cover 40 above the console 20 in the front to rear direction. He can carry out this operation by using the bar 42 as a gripping means.
- the passage from the closed position to the open position is done by pure pivoting because the springs 60 hold the pins against the front end of the slots 34. The springs 60 do not oppose the pivoting, since they stress the pins 44 only sliding. Arrived in the open position, the pivoting of the cover 40 is stopped by its rear edge 48 which abuts against the bar 70.
- two elastic blades 72 fixedly arranged on the bar 70 cooperate with the rear edge 48 of the cover 4 to avoid that it cannot accidentally pivot to the closed position.
- these elastic blades 72 are omitted and the cover 40 is kept in the open position under the effect of its weight.
- the passage of the cover 40 from the open position to the closed position is carried out in a similar manner by pure pivoting in the opposite direction after having overcome the effort of elastic retention of the blades 72.
- the bar 42 can be used as a gripping means to close the cover.
- the figures 4, 5 and 10 represent the cover 40 in the open position at rest, that is to say in the absence of an external pushing force on the bar 42 towards the console 22.
- the operator O in the case where the operator O is standing in front the control panel 22 as illustrated in figure 7 and an obstacle C occurs hitting it from behind as illustrated in figure 8 , it will be pushed towards the desk 22 - cf. arrow F 2 - and will press in this case with its bust against the bar 42.
- This effort tends to pivot the cover 40 around the pins 44 in the direction of arrow F 3 shown in the figure 9 , but this pivoting is stopped by the rear edge 48 of the cover 40 which abuts against the vertical wall of the bar 70.
- a sensor detects the movement of the cover 40 - and therefore of the bar 42 - towards the rear side of the desk 22.
- it is an inductive sensor 35 fixedly mounted on the support 30 which cooperates with a disc 45 mounted coaxial with the pin 44.
- the sensor 35 faces the disc 45. This is therefore the case in the closed position of the cover 40 illustrated in the figure 9 and in its open position illustrated in the figure 10 and in any intermediate pivoting position between these two positions when the cover 40 is opened or closed.
- the pin 44 slides in the slot 34 backwards beyond a given position, the sensor 35 no longer faces disk 45 as can be seen on the figure 11 .
- the sensor 35 is connected to the electronic circuit of the control station 20 which stops the movement in progress of the platform 10 at the moment when the exceeding of this position is detected by the sensor 35.
- the detection of the exceeding of this position amounts in fact to detecting that the crushing force applied to the bar 42 towards the console 22 has exceeded a given threshold which corresponds to the restoring force developed by the springs 60 at this position of the pawns 44.
- hood movement detection system 40 can be implemented only for one of the two pawns 44, but it is better to do it for both for reasons of reliability and security redundancy.
- the pin 44 has the possibility of sliding in the slot 34 towards the rear side of the desk 22 beyond this given position of detection of the displacement of the pin 44. This makes it possible to continue to limit the crushing force undergone by the operator O if the platform 10 continues to move by inertia effect.
- the springs 60 are chosen to develop an adequate return force in order to both effectively protect the operator O and to avoid an untimely triggering of the effort overrun detection system. Preferably, they are chosen so that the external pushing force of the bar 42 required to move the bar 42 to the position of detection of the displacement by the sensor (s) 35 is less than or equal to 10 daN and greater than or equal at 2 daN, while the detection of the displacement of the bar 42 by the sensor or sensors 35 preferably takes place for a displacement of the latter of at least 2 cm measured in a straight line from its rest position when the cover is open.
- the figure 14 shows a perspective view of a control station 120 according to a variant of the control station 20 of the Figures 1 to 13 , the protective cover 140 being shown in the open position at rest.
- Identical elements have the same reference numbers.
- the bar 142 corresponds to the bar 42 of the control station 20.
- the only difference with the control station 20 lies in the fact that the window which was defined between the bar 42 and the front edge of the cover 40 is no longer free to material, but provided with a transparent or translucent screen 141.
- the screen 141 allows the operator to see through the control members 24 when the cover 140 is open while they remain accessible for manipulation by passing the hands under the bar 142 as in the case of the control station 20
- the bar 142 then defines the front edge of the cover 140.
- the figures 15 to 18 schematically illustrate an embodiment of the control station 220 which is a variant of the control station 20 of the Figures 1 to 13 .
- the identical elements have the same references while the modified elements have the same numbers increased by 200.
- the difference with respect to the control station 20 lies in the fact that the passage between the open and closed positions of the cover 240 is carried out in the opposite direction. relative to the cover 40 of the control station 20.
- the passage from the closed position - shown to Figures 15 and 16 - to the open position - shown to Figures 17 and 18 - Is done by pivoting in the direction shown by the arrow F 6 , that is to say by tilting under the desk 22 from the front of the desk to the rear of the desk.
- the safety bar 242 which is fixedly arranged to the cover 240, is positioned on the rear side of the desk 22 and oriented downwards thereof. The safety bar is then protected against dirt and shocks during work carried out by the people on board the platform.
- the cover 240 may have a relief or an opening forming a grip handle in a zone of the cover which is situated towards the front side of the desk 22 when it is in the closed position.
- the cover 240 has a longitudinal rib 280 for this purpose.
- the bar 242 projects from the front side of the desk 22. It is then interposed between the desk 22 and the operator who stands in front of the desk 22. The bar 242 then plays the role of safety bar against crushing of the operator on the console 22 similar to the case of the bar 42 of the control station 20. In this case, the operator - having a stature as already mentioned - comes into contact with the bar 242 rather with the waist than the bust because the bar 242 is located at a lower level than the bar 42 of the control station 20. If it presses hard enough on the bar 242 - cf. arrow F 7 -, it will cause the cover 240 to slide towards the rear side of the console 22: cf. arrow F 8 .
- the mounting of the cover 240 to the railing can be carried out in a similar manner to the case of the cover 40, that is to say by pins cooperating with slots made in vertical supports fixed to the railing - similar to the supports 30 , but not visible in this case because covered by covers 238 - and biased by return springs to provide the possibilities of pivoting and sliding of the cover 240. Therefore, the assembly is not detailed again.
- the detection of the sliding of the pins can be carried out in the same way. Adaptations are made to allow tilting of the cover 240 under the console 22. In particular, the bars 16 and 70 are eliminated and the supports of the console 22 - not visible - are adapted and fixed laterally to the uprights 18a, 18b.
- the stop function of the cover 240 in the closed position of the bar 16 can be exerted by a stop fixed on the supports of the desk 22 or on the above-mentioned vertical supports.
- the stop function stopping the pivoting of the cover 240 in the open position and stopping its pivoting in the event of a push on the bar 242 towards the desk 22 in accordance with the arrow F 7 is suitable and can be carried out in cooperation with the lateral sides of the cover 240.
- the elastic blades 72 can be eliminated or replaced by elastic blades arranged on the above-mentioned vertical supports linked to the railing and cooperating with the lateral sides of the cover 240.
- the present invention is not limited to the examples and to the embodiments described and shown, but it is susceptible of numerous variants accessible to those skilled in the art.
- the bar 42 may not be arranged fixedly to the cover 40, but nevertheless be linked to the cover so as to move jointly between the open and closed positions of the cover.
- the cover and the bar can be mounted on each lateral side in pure pivoting around the same fictitious axis relative to the railing of the platform and be linked to each other at the level of the pivoting connections by springs of torsion.
- one end of the torsion spring bears on a first stop formed on the lateral side of the cover while the other end of the spring bears on the lateral upright of the U-shaped bar so as to elastically urge this upright against another stop formed on the lateral side of the cover and which is angularly offset relative to the first stop.
- the stiffness of the spring is chosen to be sufficient to avoid or limit the pivoting of the bar relative to the hood during the hood opening operation. In the open position, the cover is in abutment against a fixed stop linked to the railing of the platform preventing it from pivoting beyond this position.
- the bar can continue to pivot in the same direction - that is to say the direction towards the opening of the cover - by overcoming the elastic force of the torsion spring.
- This additional pivoting of the bar after the hood is stopped in the open position can be detected by an appropriate sensor to determine a situation of crushing of the operator against the bar.
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Description
La présente invention concerne le domaine des plates-formes élévatrices mobiles de personnel (désignées aussi par l'acronyme PEMP) encore communément appelées nacelles élévatrices. Elle concerne plus particulièrement le poste de commande agencé sur la plate-forme de travail des nacelles élévatrices.The present invention relates to the field of mobile lifting platforms for personnel (also known by the acronym PEMP) also commonly called lifting platforms. It relates more particularly to the control station arranged on the working platform of the lifting lifts.
Les nacelles élévatrices sont des machines destinées à permettre à une ou plusieurs personnes de travailler en hauteur. Pour cela, elles comprennent une plate-forme de travail prévue pour recevoir les personnes. La plate-forme de travail est supportée par un mécanisme de levage qui permet de l'élever depuis une position abaissée sur le châssis de la nacelle élévatrice jusqu'à la position de travail souhaitée en hauteur. En particulier, le mécanisme de levage peut comprendre un mât articulé et/ou télescopique à l'extrémité duquel est montée la plateforme et des vérins hydrauliques pour le déployer par rapport au châssis.Lifting cradles are machines designed to allow one or more people to work at height. For this, they include a work platform designed to receive people. The working platform is supported by a lifting mechanism which allows it to be raised from a lowered position on the chassis of the lifting platform to the desired working position in height. In particular, the lifting mechanism may include an articulated and / or telescopic mast at the end of which is mounted the platform and hydraulic jacks to deploy it relative to the chassis.
Le mécanisme de levage est souvent agencé sur une tourelle qui est montée pivotante sur le châssis, ce qui permet de changer l'orientation du mécanisme de levage - et donc de la plate-forme - par rapport au châssis. Enfin, le châssis est généralement équipé de roues ou chenilles permettant de déplacer la nacelle élévatrice au sol. Il est le plus souvent motorisé pour permettre un déplacement au sol autonome de la nacelle élévatrice.The lifting mechanism is often arranged on a turret which is pivotally mounted on the chassis, which makes it possible to change the orientation of the lifting mechanism - and therefore of the platform - relative to the chassis. Finally, the chassis is generally equipped with wheels or tracks making it possible to move the lifting platform to the ground. It is most often motorized to allow an autonomous movement on the ground of the lifting platform.
La plate-forme est équipée d'un poste de commande permettant à un opérateur à bord de la plate-forme de provoquer le déplacement de la plate-forme pour atteindre la position de travail souhaitée. Il comprend pour cela un pupitre muni d'organes de commande permettant à l'opérateur d'actionner le mécanisme de levage, voire le pivotement de la tourelle et éventuellement aussi le déplacement de la nacelle au sol.The platform is equipped with a control station allowing an operator on board the platform to cause the movement of the platform to reach the desired working position. It includes for this a console provided with control members allowing the operator to actuate the lifting mechanism, even the pivoting of the turret and possibly also the movement of the nacelle on the ground.
Lors du déplacement de la plate-forme provoqué par un opérateur au pupitre de commande de la plate-forme, il existe le risque que l'opérateur se fasse écraser contre le pupitre de commande par un obstacle extérieur - par exemple une partie d'un bâtiment, d'un ouvrage d'art ou une branche d'arbre - le heurtant par derrière.When the platform is moved by an operator to the platform console, there is a risk that the operator will be crushed against the console by an external obstacle - for example part of a building, structure or tree branch - hitting it from behind.
Pour protéger l'opérateur contre ce risque,
Il est aussi connu de disposer au niveau du pupitre de commande une barre de sécurité de manière à être interposée entre l'opérateur se tenant devant le pupitre de commande et ce dernier. Dans le cas où un obstacle extérieur le heurte par derrière lors du déplacement de la plate-forme, l'opérateur, poussé par l'obstacle vers le pupitre de commande, vient appuyer contre la barre de sécurité laquelle provoque alors l'arrêt du déplacement de la plate-forme. Un exemple d'une telle barre de sécurité est divulgué par
Par ailleurs, le poste de commande comprend généralement un capot de protection rabattable sur le pupitre de commande. Lorsqu'il est ouvert, il permet à l'opérateur d'accéder aux organes de commande du pupitre de commande. Lorsqu'il est fermé, il recouvre le pupitre de commande afin de protéger les organes de commande ainsi que ses éventuels organes de signalisation et les instructions apposées sur le pupitre contre les salissures et les chocs lors des travaux exécutés par les personnes à bord de la plate-forme. Un exemple de poste de commande comprenant un capot de protection est divulgué par
De tels postes de commande équipés d'une barre de sécurité et d'un capot de protection rabattable présentent cependant un certain nombre d'inconvénients.However, such control stations equipped with a safety bar and a folding protective cover have a certain number of drawbacks.
Ainsi, lorsque le capot est fermé, celui-ci ne recouvre généralement pas la barre de sécurité laquelle s'étend au-dessus du capot de protection et reste exposée aux chocs lors des travaux à bord de la plate-forme.Thus, when the cover is closed, it generally does not cover the safety bar which extends above the protective cover and remains exposed to shocks during work on board the platform.
De plus, le fait qu'aussi bien la barre de sécurité et le capot soient déplaçables par rapport au pupitre complexifie la conception du poste de commande, compte tenu du fait que chacun dispose de ses propres moyens de montage qu'il convient de loger dans un espace restreint sur le pupitre de commande ou autour de celui-ci.In addition, the fact that both the safety bar and the cover are movable relative to the console complicates the design of the control station, taking into account the fact that each has its own mounting means which should be accommodated in limited space on or around the control console.
Par ailleurs, la présence de la barre de sécurité au-dessus du capot de protection gêne généralement la manipulation du capot de protection pour le déplacer entre la position ouverte et fermée.Furthermore, the presence of the safety bar above the protective cover generally hinders the handling of the protective cover to move it between the open and closed position.
Le but de la présente invention est de pallier au moins partiellement les inconvénients précités.The object of the present invention is to at least partially overcome the aforementioned drawbacks.
Selon un aspect, l'invention vise plus particulièrement à faire en sorte que la barre de sécurité, ou autre élément remplissant la même fonction, gêne moins la manipulation du capot de protection du pupitre de commande lors de son ouverture ou fermeture et soit moins exposée aux chocs lors des travaux exécutés par les personnes à bord de la plate-forme de travail.In one aspect, the invention aims more particularly to ensure that the safety bar, or other element fulfilling the same function, is less hindering the handling of the protective cover of the control console when it is opened or closed, and is less exposed to shocks during work carried out by people on board the work platform.
A cette fin, la présente invention propose un poste de commande pour plateforme de travail de nacelle élévatrice, comprenant :
- un pupitre de commande sur lequel sont agencés des organes de commande ;
- un capot de protection du pupitre de commande monté de manière déplaçable entre :
- ∘ une première position dans laquelle le capot est fermé pour recouvrir le pupitre de commande, et
- ∘ une deuxième position dans laquelle le capot est ouvert pour permettre la manipulation des organes de commande depuis le côté avant du pupitre ;
- un élément longitudinal lié au capot pour se déplacer conjointement entre la première position et la deuxième position lequel élément longitudinal, lorsque le capot est dans la deuxième position, s'étend à distance le long du côté avant du pupitre en faisant saillie par rapport au côté avant du pupitre ; et
- des moyens de détection d'une sollicitation extérieure de poussée de l'élément longitudinal vers le pupitre lorsque le capot est dans la deuxième position.
- a control desk on which control members are arranged;
- a protective cover for the control console which can be moved between:
- ∘ a first position in which the cover is closed to cover the control console, and
- ∘ a second position in which the cover is open to allow manipulation of the control members from the front side of the console;
- a longitudinal element linked to the cover to move jointly between the first position and the second position which longitudinal element, when the cover is in the second position, extends at a distance along the front side of the console projecting from the side front of the desk; and
- means for detecting an external urging urge from the longitudinal element towards the console when the cover is in the second position.
Lorsqu'il est installé à bord de la plate-forme de travail d'une nacelle élévatrice, le poste de commande est prévu pour ordonner le déplacement de la plate-forme de travail. Plus précisément, lorsque le capot est en position ouverte, il permet à un opérateur se tenant devant le pupitre de commande - c'est-à-dire devant le côté avant de celui-ci - de manipuler les organes de commande pour déplacer la plate-forme de travail. L'élément longitudinal est alors positionné entre lui et le pupitre de commande sans empêcher la manipulation et la vision des organes de commande par l'opérateur. De cette façon, si l'opérateur est heurté par l'arrière par un obstacle auquel il n'a pas prêté attention lors du déplacement de la plate-forme de travail, il va être poussé vers le pupitre et donc venir appuyer sur l'élément longitudinal qu'il sollicite alors en poussée vers le pupitre. La poussée exercée par l'opérateur sur l'élément longitudinal est détectée par les moyens de détection. En coopération avec le circuit de commande des différents moyens de déplacement de la plate-forme, ils peuvent alors provoquer par exemple l'arrêt du déplacement en cours de la plate-forme afin d'éviter l'écrasement de l'opérateur contre le pupitre de commande et éventuellement enclencher un signal d'alarme lumineux et/ou sonore. L'homme du métier choisit le seuil de détection de manière appropriée pour protéger utilement l'opérateur contre l'écrasement. Il est préférable que le poste de commande soit conçu pour que la sollicitation extérieure de poussée de l'élément longitudinal vers le pupitre - qui est détectée par les moyens de détection pour protéger l'opérateur contre le risque d'écrasement - ne provoque pas la fermeture du capot. Il suffit pour cela que la fermeture du capot se fasse par une sollicitation extérieure suivant une direction différente.When installed on board the working platform of an aerial work platform, the control station is provided to order the movement of the working platform. More precisely, when the cover is in the open position, it allows an operator standing in front of the control desk - that is to say in front of the front side thereof - to manipulate the control members to move the platform -work form. The longitudinal element is then positioned between it and the control desk without preventing the operator from handling and seeing the control members. In this way, if the operator is struck from behind by an obstacle to which he did not pay attention when moving the work platform, he will be pushed towards the desk and therefore come to press on the longitudinal element which it then urges towards the console. The thrust exerted by the operator on the longitudinal element is detected by the detection means. In cooperation with the control circuit of the various means of moving the platform, they can then cause, for example, the stopping of the movement in progress of the platform in order to avoid crushing of the operator against the desk. and possibly trigger a light and / or audible alarm signal. Those skilled in the art choose the detection threshold appropriately to usefully protect the operator from being overwritten. It is preferable that the control station is designed so that the external thrust of the longitudinal element towards the console - which is detected by the means of detection to protect the operator against the risk of crushing - does not cause the cover to close. It suffices for this that the closing of the cover is done by an external stress in a different direction.
Au contraire, lorsque le capot est dans la position fermée, il protège le pupitre de commande contre les salissures et les chocs. Etant donné qu'il se déplace conjointement avec le capot de protection entre les première et deuxième positions, l'élément longitudinal ne se trouve plus dans la position en saillie par rapport au côté avant du pupitre de commande lorsque le capot est fermé, mais dans une position à l'écart. Cela est acceptable car il n'est pas utile que la sécurité contre l'écrasement de l'opérateur contre le pupitre soit active dans ce cas. En effet, lorsque le capot est fermé, l'opérateur n'a généralement pas accès aux organes de commande du pupitre. Cette situation ne correspond donc pas à une phase de manœuvre de la plate-forme par un opérateur à bord de celui-ci. En revanche, cette situation peut correspondre à une phase de travaux exécutés par les personnes à bord de la plate-forme qui est à l'arrêt. Du fait de son positionnement à l'écart, l'élément longitudinal est moins exposé aux chocs lors des travaux réalisés par les personnes à bord de la plate-forme. Par ailleurs, la manipulation du capot pour le faire passer de la position ouverte à la position fermée et réciproquement n'est plus gênée ou moins du fait de leur déplacement conjoint.On the contrary, when the cover is in the closed position, it protects the control panel against dirt and shocks. Since it moves together with the protective cover between the first and second positions, the longitudinal element is no longer in the projecting position relative to the front side of the control console when the cover is closed, but in a position away. This is acceptable because it is not useful that the operator's crush protection against the desk is active in this case. In fact, when the cover is closed, the operator generally does not have access to the console control members. This situation therefore does not correspond to a phase of maneuvering of the platform by an operator on board it. However, this situation may correspond to a phase of work carried out by the people on board the platform which is stopped. Due to its positioning away, the longitudinal element is less exposed to shocks during work carried out by people on board the platform. Furthermore, the manipulation of the cover to move it from the open position to the closed position and vice versa is no longer hampered or less due to their joint movement.
L'élément longitudinal peut être rigide. Dans ce cas, il peut avantageusement servir de moyen de préhension du capot pour le déplacer entre les positions ouverte et fermée. Il est de préférence droit, mais il peut avoir une forme différente par exemple arquée. L'élément longitudinal peut également être souple, par exemple sous la forme d'un cordon tendu entre deux barres latérales agencées fixement sur le capot de protection, les moyens de détection opérant par rapport à la tension appliquée sur le cordon similairement à la technologie divulguée dans
Le poste de commande est préférentiellement conçu et prévu pour être installé à bord de la plate-forme de travail d'une nacelle élévatrice de manière qu'un opérateur puisse manipuler et voir les organes de commandes du pupitre de commande lorsqu'il se tient droit debout devant le pupitre de commande et que le capot de protection est ouvert. L'on comprendra aussi que le poste de commande est préférentiellement conçu pour que dans la position précitée du capot et de l'opérateur devant le pupitre, ce soit avec le buste ou la taille que l'opérateur pousse sur l'élément longitudinal lorsqu'il est poussé vers le pupitre par un obstacle le heurtant par l'arrière. L'opérateur s'entend comme étant une personne de référence normalement proportionnée ayant une stature choisie entre 1,70 m et 1,90 m.The control station is preferably designed and intended to be installed on board the working platform of a lifting platform so that an operator can manipulate and see the controls of the control console when standing upright standing in front of the control console and the protective cover is open. It will also be understood that the control station is preferably designed so that in the aforementioned position of the cover and of the operator in front of the desk, it is with the bust or the waist that the operator pushes on the longitudinal element when it is pushed towards the desk by an obstacle striking it from the rear. The operator is understood to be a normally proportioned reference person with a height chosen between 1.70 m and 1.90 m.
Selon un mode de réalisation préféré, lorsque le capot est dans la deuxième position, l'élément longitudinal est agencé pour se déplacer vers le côté arrière du pupitre lorsqu'il est soumis à une sollicitation extérieure de poussée vers le pupitre, les moyens de détection opérant par détection du déplacement de l'élément longitudinal vers le côté arrière du pupitre. Ce déplacement de l'élément longitudinal permet de limiter ou supprimer l'effort d'écrasement appliqué à l'opérateur lorsqu'il est heurté par derrière par un obstacle lors du déplacement de la plate-forme. De plus, la détection du déplacement de l'élément longitudinal est simple à mettre en œuvre par exemple à l'aide d'un capteur de position d'une technologie appropriée quelconque : contacteur à galet, capteur inductif, capteur optique, etc.According to a preferred embodiment, when the cover is in the second position, the longitudinal element is arranged to move towards the rear side of the console when subjected to an external urge to push towards the console, the detection means operating by detecting the displacement of the longitudinal element towards the rear side of the console. This displacement of the longitudinal element makes it possible to limit or eliminate the crushing force applied to the operator when it is struck from behind by an obstacle during the movement of the platform. In addition, the detection of the displacement of the longitudinal element is simple to implement, for example using a position sensor of any suitable technology: roller contactor, inductive sensor, optical sensor, etc.
Dans ce mode de réalisation, il peut avantageusement être prévu que les moyens de détection opèrent par détection du déplacement de l'élément longitudinal au-delà d'une position prédéterminée vers le côté arrière du pupitre, l'élément longitudinal étant apte à se déplacer vers le côté arrière du pupitre au-delà de cette position prédéterminée. En effet, le surdéplacement de l'élément longitudinal au-delà de cette position prédéterminée limite l'effort appliqué sur l'opérateur dans le cas où malgré la commande d'arrêt provoquée par les moyens de détection, la plate-forme continue à se déplacer par effet d'inertie.In this embodiment, it can advantageously be provided that the detection means operate by detecting the displacement of the longitudinal element beyond a predetermined position towards the rear side of the desk, the longitudinal element being able to move towards the rear side of the desk beyond this predetermined position. In fact, the over-displacement of the longitudinal element beyond this predetermined position limits the force applied to the operator in the event that despite the stop command caused by the detection means, the platform continues to move by inertia effect.
Selon un autre mode de réalisation préféré qui peut être mis en œuvre indépendamment ou en combinaison avec le précédent, les moyens de détection opèrent par détection de dépassement de seuil de la force de sollicitation extérieure de poussée de l'élément longitudinal vers le pupitre. L'homme du métier choisit le seuil de détection de manière appropriée pour protéger utilement l'opérateur contre l'écrasement. Il est de préférence fixé à une valeur inférieure ou égale à 40 daN et encore plus préférablement inférieure ou égale à 20 daN. Néanmoins, il est préférable que le seuil de détection soit suffisamment élevé pour éviter un déclenchement intempestif des moyens de détection en cas d'action involontaire de l'opérateur sur l'élément longitudinal en l'absence de risque d'écrasement. Il est choisi en considération notamment du fait que les moyens de détection opèrent par rapport à un déplacement de l'élément longitudinal ou non, ainsi que de l'importance et des modalités de son déplacement le cas échéant. S'ils n'opèrent pas par rapport à un déplacement de l'élément longitudinal, le seuil de détection est de préférence fixé à au moins 10 daN.According to another preferred embodiment which can be implemented independently or in combination with the previous one, the detection means operate by detection of exceeding the threshold of the external urging force from the longitudinal element towards the console. Those skilled in the art choose the detection threshold appropriately to usefully protect the operator from being overwritten. It is preferably fixed at a value less than or equal to 40 daN and even more preferably less than or equal to 20 daN. However, it is preferable that the detection threshold is high enough to avoid inadvertent triggering of the detection means in the event of the operator's involuntary action on the longitudinal element in the absence of risk of crushing. It is chosen in consideration in particular of the fact that the detection means operate with respect to a displacement of the longitudinal element or not, as well as the importance and the methods of its displacement if necessary. If they do not operate relative to a displacement of the longitudinal element, the detection threshold is preferably fixed at least 10 daN.
Quel que soit le mode de réalisation précité, il peut être avantageusement prévu que, lorsque le capot est dans la deuxième position, l'élément longitudinal soit maintenu en position vis-à-vis d'une sollicitation extérieure de poussée de celui-ci vers le pupitre jusqu'à un niveau de force de poussée donné au-delà duquel l'élément longitudinal se déplace vers le côté arrière du pupitre. Ce déplacement de l'élément longitudinal permet de limiter ou supprimer l'effort d'écrasement appliqué à l'opérateur lorsqu'il est heurté par derrière par un obstacle lors du déplacement de la plate-forme. Ce maintien en position permet d'éviter un déclenchement intempestif des moyens de détection en cas d'action involontaire de l'opérateur sur l'élément longitudinal en l'absence de risque d'écrasement. L'homme du métier choisit ce niveau de force de poussée donné de manière appropriée pour protéger utilement l'opérateur contre l'écrasement. Il est préférablement fixé à une valeur inférieure ou égale à 40 daN, plus préférablement inférieure ou égale à 20 daN, voire plus préférablement encore inférieure ou égale à 10 daN. Dans le cas où les moyens de détection opèrent par détection de dépassement de seuil de la force de sollicitation extérieure de poussée de l'élément longitudinal vers le pupitre indépendamment du déplacement de l'élément longitudinal vers l'arrière du pupitre, il est préférable de coordonner le seuil de détection et le niveau de force de poussée donné de manière à remplir efficacement le rôle de sécurisation de l'opérateur. Pour cela, le seuil de détection est choisi inférieur au niveau de force de poussée donné afin que les moyens de détection déclenchent et provoquent l'arrêt du déplacement de la plate-forme avant le déplacement de l'élément longitudinal. En conséquence, si la plate-forme continue à se déplacer par effet d'inertie, l'élément longitudinal se déplacera vers le côté arrière du pupitre dès que le niveau de force de poussée donné est dépassé à son tour, ce qui soulagera avantageusement l'opérateur. Ce cas peut correspondre à un élément longitudinal réalisé sous la forme d'une barre rigide sensible à l'effort telle que divulguée dans
Il est avantageux que l'élément longitudinal soit ainsi maintenu en position par des moyens de rappel développant un effort de rappel, de préférence élastique, de l'élément longitudinal tout au long de son déplacement vers le côté arrière du pupitre. De ce fait, lorsque la sollicitation extérieure de poussée de l'élément longitudinal cesse, il est ramené dans sa position de repos.It is advantageous that the longitudinal element is thus held in position by return means developing a return effort, preferably elastic, of the longitudinal element throughout its movement towards the rear side of the desk. Therefore, when the external thrust stress of the longitudinal element ceases, it is returned to its rest position.
Dans ce cas, il est encore avantageux que les moyens de détection opèrent par détection du déplacement de l'élément longitudinal au-delà d'une position prédéterminée vers le côté arrière du pupitre et que, d'une part, la distance mesurée en ligne droite entre la position prédéterminée de détection du déplacement de l'élément longitudinal et la position de l'élément longitudinal en l'absence de sollicitation extérieure de poussée vers le pupitre sur celui-ci - c'est-à-dire sa position de repos - lorsque le capot est dans la deuxième position, soit supérieure ou égale à 2 cm, et, d'autre part, que la force de poussée requise pour déplacer l'élément longitudinal jusqu'à sa position prédéterminée de détection soit inférieure ou égale 10 daN. En effet, ces mesures procurent une protection très efficace de l'opérateur contre l'écrasement en raison du faible effort d'actionnement requis tout en évitant un déclenchement intempestif des moyens de détection en raison de la distance de déplacement requise de la part de l'élément longitudinal dans le cas où l'opérateur appuie involontairement sur celui-ci en dehors d'une situation de risque d'écrasement. Cependant, il est préférable que la force de poussée requise pour déplacer l'élément longitudinal jusqu'à sa position prédéterminée de détection soit choisie supérieure ou égale à 2 daN pour éviter une trop grande sensibilité de déclenchement notamment vis-à-vis des accélérations de la plate-forme. En revanche, si la distance précitée entre la position prédéterminée de détection du déplacement de l'élément longitudinal et sa position de repos lorsque le capot est ouvert est inférieure à 2 cm, alors la force de poussée requise pour déplacer l'élément longitudinal jusqu'à sa position prédéterminée de détection est de préférence choisie à au moins 10 daN.In this case, it is also advantageous for the detection means to operate by detecting the displacement of the longitudinal element beyond a predetermined position towards the rear side of the desk and that, on the one hand, the distance measured online. right between the predetermined position of detection of the displacement of the longitudinal element and the position of the longitudinal element in the absence of external urging urge towards the desk on it - i.e. its rest position - when the cover is in the second position, either greater than or equal to 2 cm, and, on the other hand, that the pushing force required to move the longitudinal element to its predetermined detection position is less than or equal to 10 daN. Indeed, these measures provide a very effective protection of the operator against crushing in due to the low actuation force required while avoiding inadvertent triggering of the detection means due to the required distance of movement on the part of the longitudinal element in the case where the operator involuntarily presses it outside d '' a risk of crushing situation. However, it is preferable that the pushing force required to move the longitudinal element to its predetermined detection position is chosen to be greater than or equal to 2 daN to avoid excessive trigger sensitivity, in particular with regard to acceleration of the platform. On the other hand, if the aforementioned distance between the predetermined position for detecting the displacement of the longitudinal element and its rest position when the cover is open is less than 2 cm, then the pushing force required to move the longitudinal element up to at its predetermined detection position is preferably chosen at least 10 daN.
Selon un mode de réalisation, le déplacement du capot entre la première position et la deuxième position se fait par basculement ou encore plus précisément par pivotement. Cela permet une mise à l'écart de l'élément longitudinal particulièrement adaptée à le protéger des chocs et des salissures lorsque le capot est en position fermée. De plus, le montage pivotant est particulièrement fiable et simple à mettre en œuvre.According to one embodiment, the displacement of the cover between the first position and the second position is effected by tilting or even more precisely by pivoting. This allows a separation of the longitudinal element particularly adapted to protect it from shocks and dirt when the cover is in the closed position. In addition, the swivel mounting is particularly reliable and simple to implement.
Selon un mode de réalisation, l'élément longitudinal est agencé fixement au capot. Ce mode de réalisation est particulièrement avantageux indépendamment de l'intérêt de la mise à l'écart de l'élément longitudinal pour le protéger des chocs et des salissures lorsque le capot est fermé. En effet, il simplifie le montage du capot et de l'élément longitudinal sur le pupitre de commande ou autour de lui puisqu'il permet de se passer d'éléments de montage propres à l'élément longitudinal à cette fin et son agencement fixe au capot est simple à mettre en œuvre. De plus, dans le cas où l'élément longitudinal est déplaçable vers le côté arrière du pupitre, il évite le risque d'interférence entre l'élément longitudinal ou des éléments le supportant - ainsi que des doigts de l'opérateur s'il tient ces derniers - avec le capot puisqu'ils se déplacent alors conjointement. Par ailleurs, si les moyens de détection opèrent par détection du déplacement de l'élément longitudinal vers le côté arrière du pupitre, l'on comprendra que cette détection peut être mise en œuvre avec un capteur quelconque approprié coopérant avec le capot pour détecter le déplacement de ce dernier puisque les deux se déplacent conjointement, ce qui est avantageusement simple à mettre en œuvre.According to one embodiment, the longitudinal element is fixedly arranged on the cover. This embodiment is particularly advantageous regardless of the advantage of setting aside the longitudinal element to protect it from impacts and dirt when the cover is closed. Indeed, it simplifies the mounting of the cover and of the longitudinal element on or around the control console since it makes it possible to do without mounting elements specific to the longitudinal element for this purpose and its fixed arrangement at the hood is simple to implement. In addition, in the case where the longitudinal element is movable towards the rear side of the desk, it avoids the risk of interference between the longitudinal element or of the elements supporting it - as well as of the operator's fingers if he holds these - with the cover since they then move together. Furthermore, if the detection means operate by detecting the displacement of the longitudinal element towards the rear side of the desk, it will be understood that this detection can be implemented with any suitable sensor cooperating with the cover to detect the displacement of the latter since the two move together, which is advantageously simple to implement.
Dans ce mode de réalisation, il est avantageux que l'élément longitudinal soit le bord avant du capot, soit une barre agencée sur le capot à distance du bord avant du capot pour définir au moins un espace libre entre la barre et le bord avant du capot, étant précisé que le bord avant du capot est le bord du capot situé vers le côté avant du pupitre lorsque le capot est dans la deuxième position. Dans ce cas, le capot peut présenter une zone adjacente au bord avant qui est réalisée en matière transparente ou translucide au travers de laquelle les organes de commande du pupitre sont visibles lorsque le capot est dans la deuxième position. Il peut aussi être prévu que les organes de commande du pupitre soient visibles au travers de l'au moins un espace libre entre la barre et le bord avant du capot lorsque le capot est dans la deuxième position.In this embodiment, it is advantageous that the longitudinal element is the front edge of the cover, or a bar arranged on the cover at a distance from the front edge of the cover to define at least one free space between the bar and the front edge of the cover. cover, it being specified that the front edge of the cover is the edge of the cover located towards the front side of the console when the cover is in the second position. In this case, the cover may have a area adjacent to the front edge which is made of transparent or translucent material through which the console control members are visible when the cover is in the second position. Provision may also be made for the console control members to be visible through the at least one free space between the bar and the front edge of the cover when the cover is in the second position.
Par ailleurs, il peut être prévu que le capot soit monté par rapport au pupitre par une liaison pivotante et coulissante pour déplacer le capot, d'une part, par pivotement pur entre la première position et la deuxième position, et, d'autre part, par coulissement vers le côté arrière du pupitre à partir de la deuxième position du capot lorsque l'élément longitudinal est soumis à une sollicitation extérieure de poussée vers le pupitre. Le fait d'utiliser des liaisons différentes pour l'ouverture et la détection d'écrasement permet de mettre au point ces deux fonctions de manière séparée pour optimiser leur fonctionnement.Furthermore, provision may be made for the cover to be mounted relative to the console by a pivoting and sliding connection for moving the cover, on the one hand, by pure pivoting between the first position and the second position, and, on the other hand , by sliding towards the rear side of the console from the second position of the cover when the longitudinal element is subjected to an external urging urge towards the console. The fact of using different links for opening and crushing detection makes it possible to develop these two functions separately to optimize their operation.
L'invention porte aussi sur une nacelle élévatrice, comprenant :
- une plate-forme de travail ;
- un mécanisme de levage de la plate-forme de travail ; et
- un poste de commande selon l'invention telle que décrit précédemment lequel est agencé sur la plate-forme de travail ;
- le poste de commande permet à un opérateur de provoquer le déplacement de la plate-forme de travail ; et
- les moyens de détection du poste de commande provoquent l'arrêt du déplacement en cours de la plate-forme de travail en cas de détection d'une sollicitation extérieure de poussée de l'élément longitudinal en direction du pupitre de commande lorsque le capot est dans la deuxième position.
- a work platform;
- a lifting mechanism for the working platform; and
- a control station according to the invention as described above which is arranged on the work platform;
- the control station allows an operator to cause the movement of the work platform; and
- the detection means of the control station cause the movement of the working platform to stop in the event of detection of an external thrust of the longitudinal element in the direction of the control console when the cover is in the second position.
D'autres aspects, caractéristiques et avantages de l'invention apparaîtront à la lecture de la description qui suit d'un mode de réalisation préféré de l'invention, donnée à titre d'exemple et en référence au dessin annexé.
- La
figure 1 représente une vue en perspective d'une nacelle élévatrice dont la plate-forme de travail est équipée d'un poste de commande selon un premier mode de réalisation de l'invention. - Les
figure 2 et 4 représentent chacune une vue en perspective de la plate-forme de travail de la nacelle élévatrice de lafigure 1 , le capot de protection du poste de commande étant respectivement en position fermée et en position ouverte. - Les
figures 3 et5 représentent un agrandissement local de lafigure 2 , respectivement de lafigure 4 , au niveau du poste de commande. - Les
figures 6 et 7 représentent respectivement une vue de face et une vue de côté de la plate-forme de travail de lafigure 1 avec un opérateur debout devant le poste de commande. - La
figure 8 représente une vue de côté de la plate-forme de travail de lafigure 1 avec l'opérateur debout devant le poste de commande et poussé contre celui-ci par un obstacle extérieur. - Les
figures 9, 10 et 11 représentent à chaque fois une vue de côté du poste de commande de lafigure 1 montrant la façon de monter le capot de protection à des supports de montage, le capot de protection étant respectivement en position fermée, en position ouverte au repos et en position ouverte, repoussée par l'opérateur vers le côté arrière du pupitre de commande. - La
figure 12 représente une vue en perspective du poste de commande de lafigure 1 observé depuis l'arrière de celui-ci, le capot de protection étant en position ouverte au repos. - La
figure 13 est un agrandissement local de lafigure 12 au niveau du côté latéral du poste de commande. - La
figure 14 représente une vue en perspective d'un poste de commande selon une variante à celui desfigures 1 à 13 , le capot de protection étant en position ouverte au repos. - Les
figure 15 et17 représentent chacune une vue en perspective d'une plate-forme de travail similaire à celle de lafigure 1 , mais équipée d'un poste de commande selon un autre mode de réalisation, son capot de protection étant respectivement en position fermée et en position ouverte. - Les
figures 16 et18 représentent chacune une vue de côté du poste de commande desfigures 15 et 17 , le capot de protection étant respectivement en position fermée et en position ouverte au repos.
- The
figure 1 shows a perspective view of a lifting platform whose working platform is equipped with a control station according to a first embodiment of the invention. - The
figure 2 and4 each represent a perspective view of the working platform of the lifting platform of thefigure 1 , the protective cover of the control station being respectively in the closed position and in the open position. - The
figures 3 and5 represent a local enlargement of thefigure 2 , respectively from thefigure 4 , at the command post. - The
Figures 6 and 7 respectively represent a front view and a side view of the work platform of thefigure 1 with an operator standing in front of the control station. - The
figure 8 represents a side view of the work platform of thefigure 1 with the operator standing in front of the control station and pushed against it by an external obstacle. - The
Figures 9, 10 and 11 each time represent a side view of the control station of thefigure 1 showing how to mount the protective cover to mounting brackets, the protective cover being respectively in the closed position, in the open position at rest and in the open position, pushed by the operator towards the rear side of the control console. - The
figure 12 represents a perspective view of the command post of thefigure 1 observed from the rear of the latter, the protective cover being in the open position at rest. - The
figure 13 is a local extension of thefigure 12 at the side of the control station. - The
figure 14 represents a perspective view of a control station according to a variant to that ofFigures 1 to 13 , the protective cover being in the open position at rest. - The
figure 15 and17 each represent a perspective view of a work platform similar to that of thefigure 1 , but equipped with a control station according to another embodiment, its protective cover being respectively in the closed position and in the open position. - The
figures 16 and18 each represents a side view of thefigures 15 and17 , the protective cover being respectively in the closed position and in the open position at rest.
Un premier mode de réalisation de l'invention est décrit maintenant en référence aux
La nacelle élévatrice comprend un châssis 2 équipé de roues 6 pour la déplacer au sol. Alternativement ou en combinaison, le châssis 2 est équipé de chenilles aux mêmes fins. Le châssis 2 est de préférence motorisé pour assurer le déplacement autonome de la nacelle élévatrice au sol.The lifting platform comprises a
La plate-forme 10 est prévue pour recevoir une ou plusieurs personnes à bord, ainsi que les outils et matériaux utiles aux travaux à réaliser en hauteur. Elle est supportée par un mécanisme de levage 8 pour l'élever depuis une position abaissée sur le châssis 2 de la nacelle élévatrice jusqu'à la position de travail souhaitée en hauteur. En l'occurrence, il comprend un mât articulé et télescopique à l'extrémité duquel est montée la plateforme 10 et des vérins hydrauliques pour le déployer par rapport au châssis 2. Le mécanisme de levage 8 est agencé sur une tourelle 4 motorisée permettant de la faire pivoter autour d'un axe vertical par rapport au châssis 2. La tourelle 4 permet ainsi de changer l'orientation du mécanisme de levage 8 - et donc de la plate-forme 10 - par rapport au châssis 2.The
Le poste de commande 20 permet à un opérateur O à bord de la plate-forme 10 de provoquer le déplacement de la plate-forme 10 pour atteindre la position de travail souhaitée. Il peut ainsi actionner le mécanisme de levage 8 et le pivotement de la tourelle 4. Il peut être prévu qu'il puisse aussi provoquer le déplacement de la nacelle élévatrice au sol.The
L'on comprendra qu'un poste de commande selon l'invention peut être montée sur la plate-forme de travail de nacelles élévatrices ayant une constitution différente, par exemple qui ont un autre type de mécanisme de levage 8 ou encore qui sont dépourvues de tourelle 4 auquel cas le mécanisme de levage est monté directement sur le châssis.It will be understood that a control station according to the invention can be mounted on the working platform of lifting lifts having a different constitution, for example which have another type of lifting mechanism 8 or which are devoid of
La
Le poste de commande 20 comprend un capot de protection 40. Le capot 40 y est représenté en position fermée tandis qu'il est représenté en position ouverte sur la
Le poste de commande 20 comprend un pupitre de commande 22 visible sur les
Comme nous le verrons plus en détail plus loin, le passage entre les positions ouverte et fermée du capot 40 se fait par pivotement autour d'un axe fictif parallèle au bord avant du pupitre de commande 22. Le bord avant du pupitre 22, ainsi que son côté avant, sont définis conventionnellement comme étant ceux correspondant au côté du pupitre devant lequel se tient l'opérateur O à bord de la plate-forme 10 pour manipuler les organes de commande 24. Au contraire, le côté arrière du pupitre 22 est le côté opposé et qui est généralement vers l'extérieur de la plate-forme 10.As we will see in more detail below, the passage between the open and closed positions of the
Lorsque le capot 40 est fermé, il recouvre le pupitre de commande 22 et le protège contre les salissures et les chocs lors des travaux effectués par les personnes à bord de la plate-forme 10. Dans cette position, les organes de commande 24 ne sont pas accessibles à l'opérateur O. En conséquence, il n'a pas la possibilité de faire déplacer la plate-forme 10.When the
Une barre 42 est agencée fixement sur le capot 40. Elle peut par exemple être réalisée monobloc avec le capot 42 par moulage de matière plastique ou composite ou être rapportée sur le capot 40 par tout moyen approprié tel que vissage ou soudage selon la matière du capot 40. La barre 42 est en l'occurrence droite et s'étend horizontalement et à distance du bord avant du capot 40 tout en étant parallèle à celui-ci. La barre 42 se poursuit à ses extrémités par deux montants conférant une forme d'ensemble en U et servant à agencer la barre 42 au capot 40. Mais différentes variantes sont possibles. Par exemple, un montant peut être agencé centralement à la barre 42 pour conférer une forme globale en T, la barre 42 étant agencée sur le capot 40 par le biais de ce montant. Selon une autre variante, la barre 42 peut avoir une forme globalement arquée et être agencée directement sur le capot 40 par ses deux extrémités opposées.A
Lorsque le capot 40 est ouvert, la barre 42 joue le rôle de barre de sécurité contre l'écrasement de l'opérateur sur le pupitre 22. Elle est alors parallèle au bord avant du pupitre 22 et s'étend tout le long du bord avant du pupitre 22 à distance de celui-ci. Elle fait saillie par rapport au côté avant du pupitre 22 en l'occurrence au-dessus du pupitre 22. Elle est ainsi positionnée entre le buste de l'opérateur O et le pupitre 22 comme cela est visible sur la
La
Les
Le support latéral 30 est en l'occurrence soudé sur la barre 70. Les supports latéraux 30 sont agencés perpendiculairement au bord avant du pupitre 22 et sont parallèles entre eux. Le capot 40 présente de chaque côté latéral un pion 44. Les deux pions 44 sont coaxiaux autour d'un axe fictif qui est parallèle à la barre 42. Chaque pion 44 est inséré dans une fente 34 ménagée dans le support vertical 30 correspondant. Les deux fentes 34 sont parallèles entre elles et s'étendent vers le côté arrière du pupitre 22. Leur dimensionnement est approprié pour permettre à la fois le pivotement et le coulissement des pions 44 dans les fentes 34. Les pions 44 sont sollicités élastiquement vers l'extrémité avant des fentes 34. En l'occurrence, la sollicitation élastique est réalisée au moyen d'un ressort de traction 60 respectif dont une extrémité est liée au pion 44 et l'autre est fixée sur le plot 32 du support 30.The
Dans la position fermée qui est illustrée par la
Pour passer le capot 40 de la position fermée de la
Le passage du capot 40 de la position ouverte à la position fermée se fait de manière similaire par pivotement pur en sens inverse après avoir surmonter l'effort de maintien élastique des lames 72. A nouveau, la barre 42 peut être utilisée comme moyen de préhension pour fermer le capot.The passage of the
Les
Un capteur détecte le déplacement du capot 40 - et donc de la barre 42 - vers le côté arrière du pupitre 22. En l'occurrence, il s'agit d'un capteur inductif 35 monté fixe sur le support 30 qui coopère avec un disque 45 monté coaxial avec le pion 44. Lorsque le pion 44 est à l'extrémité avant de la fente 34, le capteur 35 fait face au disque 45. Ceci est donc le cas dans la position fermée du capot 40 illustrée à la
Le capteur 35 est relié au circuit électronique du poste de commande 20 qui arrête le déplacement en cours de la plate-forme 10 au moment où le dépassement de cette position est détecté par le capteur 35. Par arrêt du déplacement en cours de la plate-forme 10, il faut comprendre l'arrêt de tout mouvement en cours ordonné par l'opérateur O à partir du pupitre 22 du mécanisme de levage 8 et de la tourelle 4, ainsi que le cas échéant le déplacement de la nacelle élévatrice au sol. La détection du dépassement de cette position revient en fait à détecter que l'effort d'écrasement appliqué à la barre 42 vers le pupitre 22 a dépassé un seuil donné qui correspond à l'effort de rappel développé par les ressorts 60 à cette position des pions 44.The
L'on comprendra que d'autres capteurs peuvent être utilisés à la place des capteurs inductifs 35 tels que des capteurs à galet ou des capteurs optiques. Ce système de détection du déplacement du capot 40 peut être mis en œuvre que pour un des deux pions 44, mais il est préférable de le faire pour les deux pour des raisons de fiabilité et de redondance de la sécurité.It will be understood that other sensors can be used in place of
Comme cela est visible sur la
Lorsque l'action sur la barre 42 cesse, les ressorts de rappel 60 tirent les pions 44 jusqu'à l'extrémité avant des fentes 34 et ramènent donc le capot 40 - et la barre 42 - vers la position de repos en position ouverte de la
Les ressorts 60 sont choisis pour développer un effort de rappel adéquat pour à la fois protéger efficacement l'opérateur O et éviter un déclenchement intempestif du système de détection de dépassement d'effort. De préférence, ils sont choisis pour que l'effort extérieur de poussée de la barre 42 requis pour déplacer la barre 42 jusqu'à la position de détection du déplacement par le ou les capteurs 35 soit inférieur ou égal à 10 daN et supérieur ou égal à 2 daN, tandis que la détection du déplacement de la barre 42 par le ou les capteurs 35 intervient préférablement pour un déplacement de celle-ci d'au moins 2 cm mesuré en ligne droite à partir de sa position de repos lorsque le capot est ouvert.The
La
Les
Lorsque le capot 240 est ouvert, la barre 242 fait saillie par rapport au côté avant du pupitre 22. Elle est alors interposée entre le pupitre 22 et l'opérateur qui se tient debout devant le pupitre 22. La barre 242 joue alors le rôle de barre de sécurité contre l'écrasement de l'opérateur sur le pupitre 22 similairement au cas de la barre 42 du poste de commande 20. Dans ce cas, l'opérateur - ayant une stature telle que déjà mentionnée - vient en contact avec la barre 242 plutôt avec la taille que le buste car la barre 242 se situe à un niveau plus bas que la barre 42 du poste de commande 20. S'il appuie suffisamment fort sur la barre 242 - cf. flèche F7 -, il va provoquer le coulissement du capot 240 vers le côté arrière du pupitre 22 : cf. flèche F8.When the
Le montage du capot 240 au garde-corps peut être réalisé de manière similaire au cas du capot 40, c'est-à-dire par des pions coopérant avec des fentes ménagées dans des supports verticaux fixés au garde-corps - similaires aux supports 30, mais non visibles en l'occurrence car couverts par des caches 238 - et sollicités par des ressorts de rappel afin de procurer les possibilités de pivotement et de coulissement du capot 240. De ce fait, le montage n'est pas détaillé à nouveau. La détection du coulissement des pions peut être réalisée de la même manière. Des adaptations sont apportées pour permettre le basculement du capot 240 sous le pupitre 22. En particulier, les barres 16 et 70 sont supprimées et les supports du pupitre 22 - non visibles - sont adaptés et fixés latéralement aux montants 18a, 18b. La fonction de butée du capot 240 en position fermée de la barre 16 peut être exercée par une butée fixée sur les supports du pupitre 22 ou sur les supports verticaux précités. De même, la fonction de butée arrêtant le pivotement du capot 240 en position ouverte et stoppant son pivotement en cas de poussée sur la barre 242 vers le pupitre 22 conformément à la flèche F7 est adaptée et peut être réalisée en coopération avec les côtés latéraux du capot 240. Les lames élastiques 72 peuvent être supprimées ou remplacées par des lames élastiques agencées sur les supports verticaux précités liés au garde-corps et coopérant avec les côtés latéraux du capot 240.The mounting of the
Bien entendu, la présente invention n'est pas limitée aux exemples et aux modes de réalisation décrits et représentés, mais elle est susceptible de nombreuses variantes accessibles à l'homme de l'art. Ainsi, la barre 42 peut ne pas être agencée fixement au capot 40, mais néanmoins être liée au capot de manière à se déplacer conjointement entre les positions ouverte et fermée du capot. Par exemple, le capot et la barre peuvent être montés par chaque côté latéral en pivotement pur autour d'un même axe fictif par rapport au garde-corps de la plate-forme et être lié entre eux au niveau des liaisons pivotantes par des ressorts de torsion. Plus précisément, une extrémité du ressort de torsion prend appui sur une première butée ménagée sur le côté latéral du capot tandis que l'autre extrémité du ressort prend appui sur le montant latéral de la barre en forme de U de manière à solliciter élastiquement ce montant contre une autre butée ménagée sur le côté latéral du capot et qui est décalée angulairement par rapport à la première butée. De la sorte, le capot et la barre pivotent conjointement lors du passage entre la position ouverte et fermée. La raideur du ressort est choisie suffisante pour éviter ou limiter le pivotement de la barre par rapport au capot lors de l'opération d'ouverture du capot. Dans la position ouverte, le capot est en appui contre une butée fixe liée au garde-corps de la plate-forme l'empêchant de pivoter au-delà de cette position. En revanche, la barre peut continuer à pivoter dans le même sens - c'est-à-dire le sens vers l'ouverture du capot - en surmontant l'effort élastique du ressort de torsion. Ce pivotement additionnel de la barre après que le capot soit arrêté en position ouverte peut être détecté par un capteur approprié pour déterminer une situation d'écrasement de l'opérateur contre la barre.Of course, the present invention is not limited to the examples and to the embodiments described and shown, but it is susceptible of numerous variants accessible to those skilled in the art. Thus, the
Claims (13)
- A control station (20; 120; 220) for a work platform (10) of an aerial work platform, comprising:- a control console (22) whereon control members (24) are arranged;- a cover (40; 140; 240) for protecting the control console moveably mounted between:characterized in that the control console further comprises:∘ a first position in which the cover is closed to cover the control console, and∘ a second position in which the cover is open to make it possible to manipulate the control members from the front side of the console;- a longitudinal member (42; 142; 242) linked to the cover to simultaneously move between the first position and the second position, which longitudinal member extends at a distance along the front side of the console and protrudes with respect to the front side of the console when the cover is in the second position; and- means (35, 45) for detecting an external action (F4) pushing the longitudinal member toward the console when the cover is in the second position.
- A control station according to claim 1, wherein when the cover is in the second position, the longitudinal member (42; 142; 242) is arranged to move toward the rear side of the console when subjected to an external action pushing same toward the console, with the detecting means operating by detecting the movement of the longitudinal member toward the rear side of the console.
- A control station according to claim 2, wherein the detecting means operate by detecting the movement of the longitudinal member beyond a predetermined position toward the rear side of the console, with the longitudinal member being adapted to move toward the rear side of the console beyond said predetermined position.
- A control station according to any one of claims 1 to 3, wherein the detecting means operate by detecting that a threshold of the force (F4) of the external pushing action pushing the longitudinal element toward the console has been exceeded.
- A control station according to any one of claims 1 to 4, wherein, when the cover is in the second position, the longitudinal element is held in position against an external action (F4) pushing the longitudinal element toward the console up to a given level of pushing force beyond which the longitudinal element moves toward the rear side of the console.
- A control station according to claim 5, wherein the longitudinal element is thus held in position by return means developing a preferably elastic returning force onto the longitudinal element throughout the movement of the longitudinal element toward the rear side of the console.
- A control station according to any one of claims 1 to 6, wherein the cover moves by tilting or pivoting (44) between the first position and the second position.
- A control station according to any one of claims 1 to 7, wherein the longitudinal element (42; 142; 242) is fixedly arranged on the cover.
- A control station according to claim 8, wherein the longitudinal element is:- either the front edge (142) of the cover,- or a bar (42; 242) arranged on the cover at a distance from the front edge of the cover to define at least one free space between the bar and the front edge of the cover,with the front edge of the cover being the edge of the cover toward the front side of the console when the cover is in the second position.
- A control station according to claim 9, wherein the cover (140) has an area adjacent the front edge which is made of transparent or translucent material (141) through which the control members (24) of the console (22) are visible when the cover is in the second position.
- A control station according to claim 9 or 10, wherein the control members (24) of the console (22) are visible through the at least one free space between the bar (42; 242) and the front edge of the cover (40; 240) when the cover is in the second position.
- A control station according to any one of claims 1 to 11, wherein the cover (40) is mounted relative to the console through a pivoting (44) and sliding (34) connection for moving the cover:- by merely pivoting between the first position and the second position;- and by sliding toward the rear side of the console (22) from the second position on of the cover when the longitudinal element is subjected to an external action (F4) pushing the longitudinal element toward the console.
- An aerial work platform, comprising:- a work platform (10);- a mechanism (8) for lifting the work platform; and- a control station (20) according to any one of claims 1 to 12 which is arranged on the work platform;wherein:- the control station makes it possible for an operator to cause the work platform to move; and- the detecting means (35, 45) of the control station stop the current movement of the work platform (10) upon detecting an external action (F4) pushing the longitudinal element (42; 142; 242) toward the control console (22) when the cover (40; 140; 240) is in the second position.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1562021A FR3044652B1 (en) | 2015-12-08 | 2015-12-08 | CONTROL STATION FOR WORK PLATFORM OF LIFT PLATFORM |
PCT/FR2016/053201 WO2017098120A1 (en) | 2015-12-08 | 2016-12-03 | Control station for work platform of an aerial lift |
Publications (2)
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EP3386901A1 EP3386901A1 (en) | 2018-10-17 |
EP3386901B1 true EP3386901B1 (en) | 2020-02-05 |
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Application Number | Title | Priority Date | Filing Date |
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EP16819975.0A Active EP3386901B1 (en) | 2015-12-08 | 2016-12-03 | Control station for work platform of an aerial lift |
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US (1) | US10926986B2 (en) |
EP (1) | EP3386901B1 (en) |
CN (1) | CN108367902B (en) |
AU (1) | AU2016365783B2 (en) |
CA (1) | CA3007572A1 (en) |
FR (1) | FR3044652B1 (en) |
WO (1) | WO2017098120A1 (en) |
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CN108367902A (en) | 2018-08-03 |
FR3044652B1 (en) | 2018-01-05 |
AU2016365783A1 (en) | 2018-06-28 |
CA3007572A1 (en) | 2017-06-15 |
EP3386901A1 (en) | 2018-10-17 |
CN108367902B (en) | 2020-03-06 |
FR3044652A1 (en) | 2017-06-09 |
US20200198951A1 (en) | 2020-06-25 |
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