EP1186568B1 - Hubarbeitsbühne und Verfahren zum Steuern einer sich darauf befindenden Last - Google Patents

Hubarbeitsbühne und Verfahren zum Steuern einer sich darauf befindenden Last Download PDF

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Publication number
EP1186568B1
EP1186568B1 EP01420193A EP01420193A EP1186568B1 EP 1186568 B1 EP1186568 B1 EP 1186568B1 EP 01420193 A EP01420193 A EP 01420193A EP 01420193 A EP01420193 A EP 01420193A EP 1186568 B1 EP1186568 B1 EP 1186568B1
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EP
European Patent Office
Prior art keywords
platform
pressure
work platform
parameter
values
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.)
Expired - Lifetime
Application number
EP01420193A
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English (en)
French (fr)
Other versions
EP1186568A1 (de
Inventor
Salah Beji
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.)
Pinguely Haulotte SA
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Pinguely Haulotte SA
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Publication date
Application filed by Pinguely Haulotte SA filed Critical Pinguely Haulotte SA
Publication of EP1186568A1 publication Critical patent/EP1186568A1/de
Application granted granted Critical
Publication of EP1186568B1 publication Critical patent/EP1186568B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B66F11/042—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 actuated by lazy-tongs mechanisms or articulated levers
    • 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

Definitions

  • the invention relates to a lifting platform and to a method of controlling the mass of an onboard load on the platform of such a nacelle.
  • the adjectives "lower”, “superior”, “horizontal” and “vertical” refer to orientations of the various constituent elements of a nacelle resting on a generally horizontal surface.
  • the invention it is possible to carry out a measurement of pressure at a given height and the comparison of values of pressure at different points of the elevation stroke of platform of the nacelle, the reference values which is compared this pressure may be different according to the points considered. It is thus possible to take into account pressure variations during the establishment reference values, which allows precise control of the force exerted by the load displaced by the platform.
  • the nacelle of the invention makes it possible to exercise control effective on the entire run of the platform while the previous systems were generally effective only in the vicinity of the high position of the platform run. The safety of the nacelle of the invention is therefore greatly improved compared to known nacelles.
  • the method comprises a prior acquisition step reference values during which the nacelle is moved with a known mass load, the value of the operating fluid pressure of the hydraulic means is measured at several points of the elevation stroke of this platform and the measured values are stored, as reference values for each point in a memory.
  • This stage of the process thus makes it possible to create all the reference values according to the exact kinematics of the nacelle considered.
  • the nacelle 1 shown in Figure 1 comprises a frame 2 resting by four wheels 3 on the surface S of the ground.
  • the nacelle also comprises a platform 4 on which an operator can be held when work at height must be carried out.
  • This platform comprises a floor 41 surmounted by a railing 42.
  • the floor is extensible in a generally horizontal direction represented by the arrow F 1 , which increases its useful area.
  • a structure 5 commonly known as “scissors” is installed between the frame 2 and the platform 4 and comprises arms 51 hinged together about pivots 52 and allowing, depending on the relative orientation of the arms 51, to subject at the platform 4 an upward movement relative to the frame 2, this movement being represented by the arrow F 2 .
  • Controlling the lifting movement F 2 is obtained by means of one or more hydraulic cylinders 53 whose ends 53 a and 53 b are articulated on supports 54 a and 54 b fixed to the arm 51.
  • the scissors structure 5 raises more or less platform 4 whose height H is noted with respect to the surface of the ground S.
  • an intensity control module 6 of the E force generated by the cylinder 53 on the legs 54 a and 54 b is installed near the cylinder as is shown in Figure 2.
  • This module comprises a housing 61 in which are installed a sensor 62 of the length L of the cylinder 63 and a sensor 63 of the oil pressure P in the cylinder 53.
  • the signals S 62 and S 63 generated by the sensors 62 and 63 are transmitted to a comparator 64 which accesses a memory 65 in which are stored, in the form of a curve C, different normal values P 0 of the pressure of the cylinder 53 as a function of the length L, between a corresponding value L 0 at the low position of the platform and a value L max corresponding to its high position.
  • the operation is as follows: During an upward movement of the nacelle, the value of the parameters L and P is measured continuously by the sensors 62 and 63 and, for each value of the length L, the pressure value P measured by the sensor 62 is compared with the corresponding value P 0 (L) appearing on the curve C.
  • a signal S 6 is supplied to a unit 7 for controlling the operation of the nacelle 1, this unit being able in practice to be supported by the frame 2.
  • Curve C is established with a known mass load corresponding to the maximum permissible mass for the carrycot 1, for example 1000 kg.
  • the signal S 6 is an overload signal if, for a given length L, the pressure P measured by the sensor 62 is greater than the corresponding pressure P 0 (L) appearing on the curve C.
  • Curve C is obtained by operating platform 1 after having loaded platform 4 with a mass M of predetermined weight, for example 1000 kg.
  • the values of the length L and of the pressure P are measured, continuously or in several points of the lifting stroke of the platform 4, and these values are recorded as reference values P 0 (L). in the form of a correspondence table or a curve, as represented by the arrows S '62 and S' 63 in FIG.
  • the nacelle can be planned to be used with a load of 1000 kg indoors and 800 kg outdoors, in which case two reference curves will be the subject of a prior acquisition procedure, the value of the pressure measured during operation being compared to the reference values of one of these two curves in according to the place of use of the platform.
  • the same nacelle can withstand a mass of 1000 kg up to, for example, 3 meters, then a mass of 800 kg up to about 6 meters and a mass of 400 kg up to about 10 meters.
  • the set of reference values P 0 used may vary according to the final height of use of the nacelle, the comparison module can automatically use several curves of reference values from one to the other. other.
  • the elements similar to those of the first embodiment carry references identical numbers increased by 100.
  • the nacelle 101 also includes a frame 102 and a platform 104 interconnected thanks to a scissors structure 105.
  • An actuator 153 is also used and, as is parameter representative of the height H of the platform 104 relative to the ground, the angle ⁇ of inclination of the jack 53 by report horizontally.
  • a load control module 106 exerted on the platform 4 is integrated in a housing 161 which encloses a sensor 162 for measuring the angle ⁇ and a sensor 163 for measuring the oil pressure P in the cylinder 153. These sensors are connected, inside the housing 161, to a comparator 164 which accesses a memory 165 in which are stored one or more curves C of reference values P 0 of the pressure as a function of the angle ⁇ . Depending on the result of the comparison, the comparator 164 sends a signal S 106 to a control unit 107 of the nacelle 101.
  • the one or more curves C can be determined by operating the basket 101 with a pre-determined mass load.
  • the value of the angle ⁇ is influenced by the orientation of the soil on which lies nacelle 101. In order not to distort the measurement of this angle, the attitude of the frame 102 is measured and the result of this measure is used to correct, where appropriate, the value of the angle ⁇ determined.
  • the invention has been described with a method in which the curves C are substantially continuous, in that the reference pressures P 0 are established for a large number of positions of the platform 4 or 104 on its elevation stroke . It is also possible to provide an acquisition and verification of these values in a discrete number of points, for example every 10 or 50 cm.
  • the invention has been shown with a scissor lift. However, it is applicable with a platform extensible equipped with one or more hydraulic cylinders for carry out the height displacement of the platform.
  • the invention has been shown in the case where the height measured is the height H of the platform 4 with respect to ground.
  • the height of the platform can be measured relative to chassis 2 or another elevation part known from the ground.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Wind Motors (AREA)

Claims (10)

  1. Hubarbeitsbühne mit einem Chassis und einer Plattform, die ausgebildet ist, in Bezug auf das Chassis durch hydraulische Mittel angehoben zu werden,
    Mitteln (62, 63; 162, 163) zum Messen des Drucks (P) der Betätigungsflüssigkeit der hydraulischen Mittel (53; 153) und eines Parameters (L; α), der für die Position (H) der Plattform in Bezug auf den Boden (S) oder des Chassis (2; 102) der Arbeitsbühne (1; 101) repräsentativ ist, an mehreren Punkten des Hubweges der Plattform (4; 104), dadurch gekennzeichnet, dass sie umfasst:
    einen Speicher (65; 165) zum Speichern von Referenzwerten (P0) des Drucks in Abhängigkeit des Parameters an den betrachteten Punkten und
    Mittel (6; 106) zum Vergleich der gemessenen (P) und der in dem Speicher (65; 165) gespeicherten (P0). Druckwerte an den betrachteten Punkten, wobei die Mittel in der Lage sind, ein Signal (S6; S106) in Abhängigkeit von dem Ergebnis dieses Vergleichs zu erzeugen.
  2. Arbeitsbühne nach Anspruch 1, dadurch gekennzeichnet, dass die Messmittel (62, 63; 162, 163), der Speicher (65; 165) und die Vergleichsmittel (6; 106) in einem Gehäuse (61; 161) integriert sind, das an eine Steuereinheit (7; 107) der Arbeitsbühne (1; 101) angeschlossen ist.
  3. Arbeitsbühne nach Anspruch 2, dadurch gekennzeichnet, dass das Gehäuse (61; 161) an der Arbeitsbühne (1; 101) in der Nähe der hydraulischen Mittel (53; 153) befestigt ist.
  4. Arbeitsbühne nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Messmittel (62, 63; 162, 163) in der Lage sind, die in dem Speicher (65; 165) zu speichernden Messwerte als Referenzwerte (P0) zu übertragen (S'62, S'63).
  5. Arbeitsbühnen nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die hydraulischen Mittel mindestens einen Zylinder (53; 153) umfassen, dessen Länge (L) und/oder Neigungswinkel (α) in Bezug auf eine Referenzstellung als für die Position (H) der Plattform repräsentativer Parameter verwendet wird.
  6. Verfahren zur Steuerung einer sich auf der Plattform einer Hubarbeitsbühne befindenden Last, wobei die Plattform geeignet ist, durch hydraulische Mittel in Bezug auf ein Chassis der Arbeitsbühne angehoben zu werden, dadurch gekennzeichnet, dass es die Schritte umfasst, die darin bestehen:
    an mehreren Punkten des Hubweges der Plattform den Druck .(P) der Betätigungsflüssigkeit der hydraulischen Mittel (53; 153) und einen Parameter (L; α), der repräsentativ für die Position (H) der.Plattform (4; 104) in Bezug auf den Boden (S) oder des Chassis (2; 102).ist zu messen (S62, S63) ;
    an jedem Punkt, an dem der repräsentative Parameter (L; α) gemessen wurde, den gemessenen Druckwert (P) mit einem Referenzwert (P) zu vergleichen (6; 106) und
    ein Ausgangssignal in Abhängigkeit des Ergebnisses des Vergleichs der Druckwerte (P, P0) zu erzeugen.
  7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass es darin besteht, als repräsentativen Parameter der Position (H) der Plattform (4; 104) die Länge (L) oder die Neigung (α) eines Verschiebungszylinders (53; 153) der Plattform zu verwenden.
  8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass in dem Fall, in dem der verwendete Parameter die Neigung (α) der Verschiebungszylinders (153) der Plattform (104) ist, eine Korrektur für diesen Parameter in Abhängigkeit von der Lage des Chassis (102) durchgeführt wird.
  9. Verfahren nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass es einen vorherigen Schritt der Gewinnung (S'62, S'63) der Referenzwerte (P0) umfasst, während dem die Arbeitsbuhne (4; 104) mit einer bekannten Last (M) verschoben wird, wobei der Druckwert (P) des Betätigungsfluids der hydraulischen Mittel an verschiedenen Punkten des Hubweges der Plattform gemessen wird und die gemessenen Werte als Referenzwerte (P0) für jeden Punkt in einem Speicher (65; 165) gespeichert werden.
  10. Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass es darin besteht, mehrere vorherige Schritt der Gewinnung mit unterschiedlichen Lasten (M) zu verwenden, mehrere Sätze von Referenzwerten (P0) zu speichern (S'62, S'63) und abhängig von den Benutzungsbedingungen der Arbeitsbühne, den Satz (C) an Referenzwerten auszuwählen, die für den Vergleich verwendet werden.
EP01420193A 2000-09-12 2001-09-11 Hubarbeitsbühne und Verfahren zum Steuern einer sich darauf befindenden Last Expired - Lifetime EP1186568B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0011610A FR2813875B1 (fr) 2000-09-12 2000-09-12 Nacelle elevatrice et procede de controle d'une charge embarquee sur une telle nacelle
FR0011610 2000-09-12

Publications (2)

Publication Number Publication Date
EP1186568A1 EP1186568A1 (de) 2002-03-13
EP1186568B1 true EP1186568B1 (de) 2004-03-24

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EP01420193A Expired - Lifetime EP1186568B1 (de) 2000-09-12 2001-09-11 Hubarbeitsbühne und Verfahren zum Steuern einer sich darauf befindenden Last

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EP (1) EP1186568B1 (de)
AT (1) ATE262478T1 (de)
DE (1) DE60102424T2 (de)
FR (1) FR2813875B1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7493987B2 (en) * 2002-09-09 2009-02-24 Jlg Industries, Inc. Platform load sensing for vertical lifts
FR2908120B1 (fr) * 2006-11-07 2009-07-03 Haulotte Group Sa Nacelle elevatrice et procede de surveillance d'une telle nacelle a l'arret
CN110799447B (zh) 2017-01-25 2021-03-16 Jlg工业公司 基于压力的载荷传感系统
CN114572911A (zh) * 2022-03-10 2022-06-03 浙江鼎力机械股份有限公司 一种剪叉式高空作业平台及其剪叉起升总成

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4456093A (en) * 1981-06-16 1984-06-26 Interstate Electronics Corp. Control system for aerial work platform machine and method of controlling an aerial work platform machine
IT1204913B (it) * 1987-03-06 1989-03-10 3B6 Sistemi Elettro Idraulici Dispositivo limitatore di sbraccio e/o di momento per piataforme elevatrici
JPH054798A (ja) * 1991-06-26 1993-01-14 Showa Aircraft Ind Co Ltd リフト装置の荷重測定方法
JP2000128498A (ja) * 1998-10-22 2000-05-09 Aichi Corp 高所作業車の過積載防止装置

Also Published As

Publication number Publication date
FR2813875B1 (fr) 2002-11-29
ATE262478T1 (de) 2004-04-15
DE60102424T2 (de) 2005-03-10
DE60102424D1 (de) 2004-04-29
EP1186568A1 (de) 2002-03-13
FR2813875A1 (fr) 2002-03-15

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