EP3013731B1 - Sicherheitseinrichtung für eine steuerstation einer hebebühne - Google Patents

Sicherheitseinrichtung für eine steuerstation einer hebebühne Download PDF

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Publication number
EP3013731B1
EP3013731B1 EP14734777.7A EP14734777A EP3013731B1 EP 3013731 B1 EP3013731 B1 EP 3013731B1 EP 14734777 A EP14734777 A EP 14734777A EP 3013731 B1 EP3013731 B1 EP 3013731B1
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EP
European Patent Office
Prior art keywords
safety bar
platform
operator
bar
lift according
Prior art date
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Active
Application number
EP14734777.7A
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English (en)
French (fr)
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EP3013731A1 (de
Inventor
Sebastian DITTUS
Christophe CARRILLO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Haulotte Group SA
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Haulotte Group SA
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Publication date
Application filed by Haulotte Group SA filed Critical Haulotte Group SA
Publication of EP3013731A1 publication Critical patent/EP3013731A1/de
Application granted granted Critical
Publication of EP3013731B1 publication Critical patent/EP3013731B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • 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

Definitions

  • the invention relates to a lifting platform or mobile elevating platform of personnel allowing an operator to work at height.
  • An aerial platform most often includes a chassis that is equipped with means for moving on the ground surface, such as wheels or tracks.
  • An aerial platform also comprises a mast supporting a platform provided with means for raising the latter relative to the chassis.
  • These elevation means generally comprise one or more mast deployment cylinders controlled by control means integrated into a control console.
  • some control panels are equipped with a safety bar which is mounted so as to tilt or slide on the console and which has the function of to control the operation of the control means of the displacement of the platform. Indeed, when a careless operator is hit by an obstacle, the operator is pressed against the control panel and causes in its movement the safety bar tilting or sliding. After a certain stroke, the safety bar inhibits the operation of the control means so that all movements of the platform are stopped. This safety bar therefore plays the role of a stop button which is mechanically actuated during a collision between the operator and an obstacle.
  • JP-U-64 12100 and WO-2009/037429 each discloses a platform platform lift which is suitable for work at height and which is provided with means for controlling the displacement of the platform.
  • These control means are integrated in a console on which is mounted, in a tilting manner, a safety bar. The application of a force on this safety bar, in particular due to the collision with an obstacle, engages a switch ensuring the complete stop of the movements of the platform.
  • JP-U-64 12100 a tilting of the safety bar causes a sudden cut of all the movements of the platform in order to limit the crash of the operator.
  • an untrained or inattentive operator takes support on the safety bar during the displacement of the platform when no danger is present. In this case, the displacement of the platform stops abruptly which can cause a loss of balance of the operator and cause injuries or even falls.
  • the platform disclosed in WO-2009/037429 incorporates a spring which is interposed between the console and the safety bar and which is strongly compressed so as to oppose the tilting of the bar. It thus prevents the displacement of the bar if the applied force is less than a predetermined value. It is therefore necessary that the operator undergoes a high thrust force to engage the contactor. In practice, it happens that the operator is often crushed by the obstacle even before the cut occurs.
  • Some control consoles such as the one integrated into the platform disclosed in GB-A-2,481,709 , are equipped with an electronic module in which is provided a filter of the signal emitted during the tilting of the safety bar.
  • This filter has the function, in a manner similar to a self-timer, to prevent the emergency stop of the platform until a certain time has elapsed.
  • the invention more particularly intends to remedy, by proposing an aerial platform that ensures better operator safety during work at height.
  • the invention relates to a lifting platform comprising a chassis equipped with means for moving on the ground surface, a mast, a platform supported by the mast and a control panel, mounted on the platform and comprising means for controlling the movements of the platform, and a safety bar mounted pivotally or slidably relative to the desk, intended to control the operation of the control means and provided to take a first rest position where the safety bar does not prevent operation control means, and a second position, wherein the safety bar inhibits the operation of the control means.
  • the safety bar during its tilting or sliding between the first position and the second position, takes an intermediate position where it does not prevent the operation of the control means and where it activates warning means .
  • the safety bar switches to the intermediate position and activates the warning means which warn the operator that, if he continues to press the safety bar, all movements of the platform will be cut off.
  • the platform movement control means are not inhibited, so that the operator is not likely to be surprised by the sudden stop of the displacement of the platform. As a result, the risk of the operator falling is greatly reduced.
  • a lifting platform 2 used to transport an operator O in height.
  • This aerial platform 2 comprises a chassis 4 equipped with means of displacement on the surface of the ground S. In this case, these moving means are wheels 6 but they can also be caterpillars.
  • On the chassis 4 is mounted a mast 8 supporting a platform 10.
  • the operator O positioned on the platform manipulates a console 14 fixed to a wall of the platform 10 and comprising a plurality of buttons and levers 16 which together form displacement control means
  • the means 16 control the wheels 6 and the mast 8, which makes it possible to move the platform 2 relative to the ground and the platform 10 relative to the chassis 4.
  • a safety bar 18 is hingedly mounted on the desk 14.
  • This security bar 18 is hollow and U-shaped, each branch of the U being connected to the desk 14.
  • the safety bar 18 is an opaque metal bar in which are formed three receiving holes d V light signaling members. These signaling elements are LEDs V which are respectively numbered 20, 22 and 24.
  • the indicator light 20 is green, the indicator light 22 is orange and the indicator light 24 is red.
  • the safety bar 18 is in a first position, or rest position, which means that the operator O can freely manipulate the control means 16 to move the platform 10.
  • the green indicator 20 is then lit.
  • the safety bar 18 is generally contained in a plane P18 and comprises, at its two ends 18A and 18B, detection means M1 and M2 of the tilting of the safety bar 18.
  • detection means M1 and M2 comprise sensors Hall effect proximity switches 36 and 38 which control the operation of the control means 16 and which are provided to detect the presence of a metal tip at a distance of less than 4mm in a Y18 direction perpendicular to the X18 axis in the P18 plane . They are therefore binary type sensors.
  • metal ferrules 28 and 40 are attached to respectively numbered cables 26A and 26B.
  • the cables 26A and 26B wind around a shaft substantially parallel to the axis X18 during the tilting of the safety bar 18 which causes the displacement of the metal ends 28 and 40 along the axis Y18, relative to to the sensors 36 and 38.
  • the signal emitted by the sensors 36 and 38 changes value depending on the presence or absence of a metal body in the measuring field.
  • a displacement of the metal tips 28 and 40 induces a change of the signal emitted by the sensors 36 and 38 and, if this movement causes the metal tips 28 and 40 to leave the field, the activation of the sensor springs 32 and 34 take respectively support metal ferrules 28 and 40 so that the latter are maintained in elastic load along the axis Y18 and in the direction respectively of the sensors 36 and 38.
  • the metal tips 28 and 40 are hollow to facilitate their attachment to the cables 26A and 26B and have a stepped shape adapted to bear on one end of the springs 32 and 34.
  • FIG 7 On the figure 7 is represented a situation of unintentional support of the operator O on the safety bar 18.
  • This support is represented at the figure 7 by an arrow F1 and causes the safety bar to tilt around axis X18 until it reaches an intermediate position represented at the figure 9 where it has tilted slightly from its idle state, represented at figure 6 .
  • P18 is then noted a plane in which is contained the safety bar 18 in this intermediate position.
  • the plane P18 ' is inclined relative to the plane P18 by an angle A1.
  • the angle A1 is between 5 ° and 20 °, in particular equal to 15 °.
  • the safety bar 18 does not prevent the operation of the control means 16.
  • the manipulation of the control means 16 still involves the displacement of the platform 10.
  • warning means which in the example boils down to the indicator 22, warn the operator O that the safety bar 18 has begun to rock and that if the movement continues, it is about to inhibit the operation of the control means 16, thus stopping any movement of the platform 10.
  • the orange indicator 22 is then lit.
  • the tilting of the safety bar 18 between the first position, or rest position and the intermediate position causes a tensile force on the cables 26A and 26B.
  • This tensile force represented by an arrow F4 to Figures 9 and 10 , causes the metal tips 28 and 40 to move against the action of the springs 32 and 34 and in a direction opposite to the sensors 36 and 38. In other words, the metal tips 28 and 40 move away from the sensors 36 and 38.
  • the spring 32 and 34 and the tension of the cables 26A and 26B do not oppose almost any resistance to the tilting of the bar 18 so that, unlike the safety bars known from the prior art, there is no need to apply a significant effort to move the bar 18.
  • the effort required to move the bar 18 is very small unlike the safety bars according to the prior art where it is necessary to apply a significant effort to for example compressing a spring directly opposing the movement of the bar.
  • the application of a force of the obstacle on the operator often implies that the operator is injured before triggering the emergency stop.
  • the safety bar 18 of the nacelle of the invention moves faster, which causes the emergency stop without the operator O is crushed beforehand.
  • the distance between the sensor 36 and the metal tip 28 is less than 1 mm, that is why it is not represented at the figure 11 , and the distance d1, visible at the figure 12 between the sensor 38 and the metal tip 40 is greater than 2 mm.
  • the detection means M1 and M2 are provided to activate when the distance between the sensor and the movable conductive part exceeds 4 mm. Thus, at rest the two detection means M1 and M2 are inactive.
  • a distance d3, visible at the figure 14 digs between the sensor 38 and the metal tip 40 at the level of the detection means M2.
  • This distance d3 being greater than 4mm, the detection means M2 therefore activates the warning means, namely the orange indicator 22, which lights up.
  • the detection means M2 is therefore a warning device.
  • the tensile force F3 of the cable 26 creates a distance d2, visible at the figure 13 , at the end 18A of the safety bar 18 between the sensor 36 and the metal tip 28.
  • This distance d2 is however less than 4 mm, so that the detection means M1 is not activated and the safety bar 18 does not prevent the operation of the control means 16. In other words, the displacement of the platform 20 is always possible.
  • the safety bar 18 is in a second position, or stop position in which it inhibits the operation of the control means 16, that is to say that they no longer cause the displacement of the platform 10. Otherwise formulated, an emergency stop signal is sent by the detection means M1 to an electronic unit control not shown, to block the displacement of the platform 10.
  • the safety bar 18 therefore operates as a stop button which involves a sudden stop of the platform 10 when actuated. This sudden stop is for example obtained by cutting off the power supply of the deployment cylinders of the mast 8 and the drive means of the wheels 6.
  • the detection means M1 is therefore a triggering means of a safety device.
  • the safety bar 18 is then contained in a plane P18 "which marks an angle A2 with the plane P18 in which the safety bar 18 is contained at rest
  • the angle A2 is between 20 ° and 60 ° , in particular equal to 30 ° C.
  • the sensor 36 and the metal tip 28 of the first detection means M1 are then separated by a distance d4 which is greater than 4 mm.
  • the detection means M1 send an emergency stop signal to the electronic control unit of the nacelle 2 so that the operator O does not suffer from the crushing between the beam P and the control means 16 In this position, the red indicator light 24 is on.
  • a tilting angle A1 makes it possible, from the rest position, to reach the intermediate position, whereas an angle tilting A2 makes it possible, from the rest position, to reach the off position. where the platform 10 is immobilized.
  • the safety bar 18 can continue its tilting beyond the angle A2.
  • the voltage of the cables 26A and 26B increases the distance between the sensors 36 and 38 and the metal tips 28 and 40.
  • the detection means M1 send an emergency stop signal and the platform 10 is immobilized.
  • the progressive switchover of safety bar 18 causes a warning then a stopping instruction.
  • the fact of being able to continue to switch the safety bar 18, even after activation of the emergency stop allows the operator to set the bar 18 against the desk and to disengage from the contact zone with the beam P
  • the safety bar does not hurt the operator by holding it against the obstacle.
  • the safety bar 18 accompanies the movement of the operator O to prevent it from being crushed between the bar 18 and the beam P.
  • the operator O releases the force applied on the safety bar 18, it then returns to its rest position by the action of the springs 32 and 34.
  • the springs 32 and 34 tend to pull the cables 26A and 26B so as to bring the metal tips 28 and 40 of the sensors 36 and 38 respectively detection means M1 and M2.
  • the springs 32 and 24 reduce vibrations and improve the stability of the bar 18.
  • the LEDs V are directly integrated in the console 14.
  • the security bar is made of a translucent material, in particular polymethyl methacrylate (Plexiglas, registered trademark) in order to be able to diffuse the light.
  • the security bar 18 may be a luminescent tube containing a set of light-emitting diodes arranged at regular intervals along its main axis.
  • the light signaling member is therefore the safety bar 18 as a whole which increases the visibility of the light signal.
  • several colors can be used for signaling, each color corresponding to a position of the bar 18. Thus, the operator easily makes a cognitive connection between the color of the safety bar 18 and its position.
  • only the indicator light 22 comes on when tilting bar 18 and remains on the rest of the race.
  • the safety bar 18 is slidably mounted relative to the panel 14.
  • the bar 18 can be depressed as a drawer in a housing of the desk when pressed.
  • the translational movement of the safety bar 18 first causes the triggering of the warning device M2 and the triggering of the safety device M1.
  • the warning means furthermore comprise or boil down to a buzzer, adapted to emit a predetermined sound when the safety bar 18 is in its intermediate position. Therefore, if the operator O does not have his eyes fixed on the security bar 18 and therefore does not see the orange indicator 22, he is still warned that he is pressing the security bar 18.
  • the safety bar 18 sends, when it reaches its intermediate position, a signal to the electronic control unit to slow down all the movements of the platform 10.
  • the speed of movement of the platform 10 can be divided by two. In this way, a collision between the beam P and the operator O first causes a slowing of the displacement of the platform 10 which limits the crash of the operator O in case of collision.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)

Claims (10)

  1. Hubarbeitsbühne (2), umfassend ein mit auf der Oberfläche des Bodens (S) angeordneten Fortbewegungsmitteln (6) versehenes Gestell (4), einen Mast (8), eine von dem Mast gestützte Plattform (10), ein auf der Plattform montiertes und Mittel (16) zum Steuern der Bewegungen der Plattform umfassendes Bedienpult (14) und einen Sicherheitsbügel (18), welcher bezogen auf das Bedienpult kippbar oder verschiebbar ist und zum Steuern des Betriebs der Steuermittel (16) und zum Einnehmen folgender Positionen ausgelegt ist:
    - eine erste Ruheposition, in der der Sicherheitsbügel (18) den Betrieb der Steuermittel (16) nicht unterbindet, und
    - eine zweite Position, in der der Sicherheitsbügel den Betrieb der Steuermittel hemmt,
    dadurch gekennzeichnet,
    dass der Sicherheitsbügel (18) während seines Kippens oder Verschiebens zwischen der ersten Position und der zweiten Position eine Zwischenposition einnimmt, in der er den Betrieb der Steuermittel (16) nicht unterbindet und Warnmittel (22) einschaltet.
  2. Hubarbeitsbühne nach Anspruch 1,
    dadurch gekennzeichnet,
    dass die Hubarbeitsbühne mindestens ein Signalisierungsmittel umfasst, insbesondere drei Kontrollleuchten (20, 22, 24), welche jeweils in einer Position des Sicherheitsbügels (18) eingeschaltet sind.
  3. Hubarbeitsbühne nach Anspruch 2,
    dadurch gekennzeichnet,
    dass eine erste Kontrollleuchte (20) in einer ersten Farbe eingeschaltet ist, wenn sich der Sicherheitsbügel (18) in seiner ersten Position befindet, eine zweite Kontrollleuchte (24) in einer zweiten Farbe eingeschaltet ist, wenn sich der Sicherheitsbügel in seiner zweiten Position befindet, und eine dritte Kontrollleuchte (22) in einer dritten Farbe, welche den Warnmitteln zugeordnet ist, eingeschaltet ist, wenn sich der Sicherheitsbügel in seiner Zwischenposition befindet.
  4. Hubarbeitsbühne nach Anspruch 2 oder 3,
    dadurch gekennzeichnet,
    dass die Kontrollleuchten (20, 22, 24) in dem Sicherheitsbügel (18) integriert sind.
  5. Hubarbeitsbühne nach Anspruch 4,
    dadurch gekennzeichnet,
    dass der Sicherheitsbügel (18) zumindest teilweise aus einem transparenten oder transluziden Material ausgebildet ist, insbesondere aus Polymethylmethacrylat.
  6. Hubarbeitsbühne nach Anspruch 2 oder 3,
    dadurch gekennzeichnet,
    dass die Kontrollleuchten (20, 22, 24) in dem Bedienpult (14) integriert sind.
  7. Hubarbeitsbühne nach einem der vorangehenden Ansprüche,
    dadurch gekennzeichnet,
    dass die Warnmittel einen Warntongeber aufweisen, welcher ausgelegt ist, einen vorbestimmten Ton zu erzeugen, wenn sich der Sicherheitsbügel (18) in seiner Zwischenposition befindet.
  8. Hubarbeitsbühne nach einem der vorangehenden Ansprüche,
    dadurch gekennzeichnet,
    dass die Bewegungen der Plattform (10) verlangsamt sind, wenn sich der Sicherheitsbügel (18) in seiner Zwischenposition befindet.
  9. Hubarbeitsbühne nach einem der vorangehenden Ansprüche,
    dadurch gekennzeichnet,
    dass der Sicherheitsbügel (18) U-förmig ausgebildet ist und dass die Kippbewegung (F1, F3) oder Verschiebebewegung des Sicherheitsbügels zwischen seiner ersten und seiner zweiten Position außerhalb der Plattform (10), bezogen auf den Standort eines für die Betätigung der Steuermittel (16) eingesetzten Bedieners (O), erfolgt.
  10. Hubarbeitsbühne nach einem der vorangehenden Ansprüche,
    dadurch gekennzeichnet,
    dass die Hubarbeitsbühne Mittel (M1, M2) zum Erfassen der Kippbewegung (F1, F3) oder der Verschiebebewegung des Sicherheitsbügels (18) aufweist, welche den Betrieb der Steuermittel (16) steuern.
EP14734777.7A 2013-06-25 2014-06-24 Sicherheitseinrichtung für eine steuerstation einer hebebühne Active EP3013731B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1356056A FR3007401B1 (fr) 2013-06-25 2013-06-25 Nacelle elevatrice a pupitre de commande securise
PCT/EP2014/063280 WO2014206982A1 (fr) 2013-06-25 2014-06-24 Nacelle elevatrice a pupitre de commande securise

Publications (2)

Publication Number Publication Date
EP3013731A1 EP3013731A1 (de) 2016-05-04
EP3013731B1 true EP3013731B1 (de) 2017-07-12

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Application Number Title Priority Date Filing Date
EP14734777.7A Active EP3013731B1 (de) 2013-06-25 2014-06-24 Sicherheitseinrichtung für eine steuerstation einer hebebühne

Country Status (7)

Country Link
US (1) US9656845B2 (de)
EP (1) EP3013731B1 (de)
CN (1) CN105339295B (de)
AU (1) AU2014301264B2 (de)
CA (1) CA2913959C (de)
FR (1) FR3007401B1 (de)
WO (1) WO2014206982A1 (de)

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CN105339295A (zh) 2016-02-17
AU2014301264B2 (en) 2018-11-15
CN105339295B (zh) 2017-06-13
AU2014301264A1 (en) 2015-12-24
WO2014206982A1 (fr) 2014-12-31
FR3007401A1 (fr) 2014-12-26
US9656845B2 (en) 2017-05-23
CA2913959C (fr) 2021-05-18
AU2014301264A2 (en) 2016-08-25
FR3007401B1 (fr) 2015-07-03
EP3013731A1 (de) 2016-05-04
US20160137471A1 (en) 2016-05-19
CA2913959A1 (fr) 2014-12-31

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