EP0285710A1 - Vorrichtung zur Begrenzung der Reichweite des Armes und/oder des Moments für Hebebühnen - Google Patents

Vorrichtung zur Begrenzung der Reichweite des Armes und/oder des Moments für Hebebühnen Download PDF

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Publication number
EP0285710A1
EP0285710A1 EP87201519A EP87201519A EP0285710A1 EP 0285710 A1 EP0285710 A1 EP 0285710A1 EP 87201519 A EP87201519 A EP 87201519A EP 87201519 A EP87201519 A EP 87201519A EP 0285710 A1 EP0285710 A1 EP 0285710A1
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EP
European Patent Office
Prior art keywords
values
maximum
machine
sensors
electronic unit
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.)
Ceased
Application number
EP87201519A
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English (en)
French (fr)
Inventor
Allesandro Bertola
Gianmarco Bonetti
Giovanni Beltrami
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.)
3B6 sistemi elettro-idraulici SNC
Original Assignee
3B6 sistemi elettro-idraulici SNC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 3B6 sistemi elettro-idraulici SNC filed Critical 3B6 sistemi elettro-idraulici SNC
Publication of EP0285710A1 publication Critical patent/EP0285710A1/de
Ceased 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
    • 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 present invention refers to a device for limiting arm range and moment on elevator platforms.
  • limiting devices that include a central electronic unit which can: - identify by means of sensors the lengths and angles of the arms supporting the platform and/or the overtur­ning moment to which the structure is subjected be­cause of its geometrical form and load conditions; - compare the values so identified with previously sto­red maximum values to enable automatic action to be taken on the controls of the machine once the latter values are reached.
  • the invention here described aims at overcoming the above drawbacks.
  • One of its advantages is that sensors can be set and maximum working curves memorized directly with the machine in working conditions by simple operations requiring no instruments.
  • Another advantage is that the limiting device can be designed without reference to the characteristics of the machine on which it is to be installed so that it can be applied to any machine whatever its geometrical configurations (arm length and angles) and its permessible working modes (permessible loads and working positions) may be.
  • the device comprises a central electronic unit able to: - store data of the maximum working curves; - process signals recerved from the sensors placed to identify the working conditions of the machine, especially length and angular positions of the arms and the overturning moment; - process and compare the above signals with the maximum tolerable values, calculated through the maximum curves already stored; - control the machine in accordance with the results of these comparisons.
  • the same device is characterized by the fact that: - the electronic unit is equipped with a control device that records, in a non-destructive redout memory, the values of signals received from the above sensors, these values being recorded as the maximum operational values the machine can withstand; - storage of maximum curve values in the electronic unit is done by placing the machine in a sufficient number of critical working positions and then, for each critical position and using the above control device, storing the corresponding critical values indicated by the sensors.
  • Fig.1 shows an elevator platform of the truck-mounted type on which a limiting device for arm range and moment is installed. Electrical connections between the device's central electronic unit and the outlying units linked to it are seen in Fig.2 .
  • the meaning of the coponent parts indicated in these two figures are explained below:
  • A. central electronic unit (usually encased in a shock and dust-proof container) the purpose of which is to store data concerning the machine's maximum operation curves, process signals received from the sensors and carry out automatic control of functions;
  • arm extension and inclination sensors (usually housed in a single container) for measuring the extension of arm I and its inclination during operations (the extension sensor is substantially sensitive to rotation of the supporting pin of a servo-assisted cable coiler which keeps the unwound part of cable H under constant tension and coils or uncoils said part as the extension of arm I varies; the inclination sensor measures inclination of arm I in relation to rotation of a pin - held constantly in place by the force of gravity - during the various inclining movements made by the arm;
  • G hoisting cylinder for regulating arm angle when the machine is working
  • D. pin-type loading sensor used to determine the thrust exercized by the hoisting cylinder and which replaces the upper or lowre articulation pin (see dotted line in Fig.1) of said cylinder;
  • E differential pressure transducer which can be used as an alternative to sensor D to detect, by means of the hydraulic pressures present in the chamber of the cylinder (misured at the ends of the same), the degree of thrust exerted by said cylinder;
  • F. panel (installed if required on the platform) for checking and visualizing working conditions (warning and machine-locking light, acoustic warning, moment and arm range visualizer);
  • Fig.3 shows an example of maximum operational curves (diagram of prmitted arm range) supplied by the makers of elevator platforms.
  • Curve D ⁇ C ⁇ B ⁇ A ⁇ G ⁇ diagrammatically represents permitted arm range under a platform load of 200 Kg; curve D ⁇ B ⁇ F ⁇ represents permitted arm range under a load of 300 Kg, and curve D ⁇ C ⁇ E ⁇ represents permitted arm range under a load of 400 Kg.
  • These diagrams apply to any position assumed by the turret (for rotation round its own axis) as long as the supporting base of the machine can be considered substantially symmetrical to said axis. If not, the maximum working curves vary not only with changes in load but also with variations to the supporting base of the machine (the degree to which stabilizing transoms placed at the base of the machine are pushed in or pulled out) and to turret orientation.
  • the number of maximum operational curves needed must suit the machine's possible working conditions (turret orientation, permitted load, transom positions). Each time there is a change in conditions, the relevant maximum curve is automatically chosen by means of microswitches - sensitive to these changes - mounted on the machine.
  • Fig.4 illustrates a possible configuration of the central electronic unit according to the invention, the blocks being placed to represent:
  • Limiting device operation may be described as follows. When this device is adjusted for the first time, with the machine in working conditions, the operations of monitoring and storage are first put into effect by activating the microswitches present in 19.
  • initial sensor setting is car­ried out as follows: taking the inclination sensor as an example, the arm is first inclined at its minimum angle.
  • the setting control is then actuated (by rotating the related transducer) until the signal emitted by the in­clination sensor reaches a value conventionally assumed by the electronic unit as zero, and this is shown in 19 by a LED (minimum LED) lighting up.
  • the setting control is then locked in this conventional zero position.
  • the arm is next moved to its maximum angle of inclination and in that position a button switch in 19 is depressed to allow the output signal from the sensor to be stored (in 4) as the maximum angle value.
  • Storage procedure consists simply of making the arm do the maximum range curve under actual load conditions (it being possible to identify this curve by noting how arm movement affects the stabilizing transoms).
  • Data so stored form a chart identifiable in store by a univocal configuration of limit stop signals originated in the above-mentioned microswitches used for identifying the various operating conditions (turret position, permitted load, position of the stabilizers) and, in this way, a set of charts can be prepared and called up automatically when certain working conditions cause these microswitches to be actyated.
  • the following operations can be carried out during the storage process: - storing values of maximum arm extension or of moment; - storing pre-alarm values of arm extension or of moment; - a step-by-step check on stored values; - cancellation of each step or of the whole chart.
  • controlling action by the device may be described as follows: signals relating to arm inclination, arm extension ant the moment, continuously identified by the sensors, arrive at the central processing unit. According to the value of the angle signal this unit chooses a pair of angular values stored in 4 which include the angle identified. Pre-sto­ red values for maximum arm extension, maximum moment and pre-alarm correspond to these angular stored values; by means of linear interpolation the control function then works out the corresponding intermediate arm extension value permitted and the related pre-alarm value.
  • the device operates a pre-alarm relay when arm extension lies between the pre-alarm (slow-down) value and the maximum admitted value (which locks the machine) while, when arm extension exceeds the maximum permitted value, the device operates the locking relay.
  • Reliability of the device is increased by the presence of a circuit for diagnosing possible malfunctioning or errors.
  • a circuit for diagnosing possible malfunctioning or errors In fact by means of unit 18, in Fig.4, any dis­crepancies in values of feed voltage to the electronic circuits can be identified and a warning given.
  • the signaler/time 10 makes it possible to locate malfunctioning in the processing circuit causing the machine to lock.
  • the system is made ven more reliable by internal soft­ware for diagnosis that maintains a watch on the inter­nal circuits and on the sensors mounted on the machine, to make sure they work efficiently.
  • the values of sig­nals received from the angle sensor are checked at regu­lar intervals to ensure their remaining within the li­mits of tolerance: if damage occurs to any connecting cables or to the transducer itself, the locking system comes into effect.
  • the same kind of control is main­tained on the signal from the arm extension sensor.
  • a further check to see that recorded data are correct is made each time the central electronic unit is switched on, and at regular intervals during work, by means of a specially devised check-sum routine; if any discrepancies emerge the machine is immediately locked.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Jib Cranes (AREA)
EP87201519A 1987-03-06 1987-08-11 Vorrichtung zur Begrenzung der Reichweite des Armes und/oder des Moments für Hebebühnen Ceased EP0285710A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT19611/87A IT1204913B (it) 1987-03-06 1987-03-06 Dispositivo limitatore di sbraccio e/o di momento per piataforme elevatrici
IT1961187 1987-03-06

Publications (1)

Publication Number Publication Date
EP0285710A1 true EP0285710A1 (de) 1988-10-12

Family

ID=11159562

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87201519A Ceased EP0285710A1 (de) 1987-03-06 1987-08-11 Vorrichtung zur Begrenzung der Reichweite des Armes und/oder des Moments für Hebebühnen

Country Status (2)

Country Link
EP (1) EP0285710A1 (de)
IT (1) IT1204913B (de)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0353099A2 (de) * 1988-07-29 1990-01-31 Scimitar Instrumentation Limited System zur Überwachung der Tragfähigkeit z.B. bei einem Kran
EP0364994A1 (de) * 1988-10-19 1990-04-25 Man Ghh Krantechnik Gmbh Kransteuerung
EP0387399A2 (de) * 1989-03-16 1990-09-19 Ppm S.A. Verfahren und Vorrichtung zur Steuerung der Kranfunktionen eines mobilen Teleskopauslegerkrans
AU635856B2 (en) * 1990-09-05 1993-04-01 Morita Fire Pump Mfg. Co., Ltd. Apparatus for automatically operating high-place working vehicles
EP0535339A1 (de) * 1991-10-02 1993-04-07 Jlg Industries, Inc. Lastmomentanzeigevorrichtung
DE29500194U1 (de) * 1995-01-10 1996-03-21 Jaresch u. Wegener Inhaber Dirk Jaresch, 44867 Bochum Oberleitungsmontagewagen
EP0786432A3 (de) * 1996-01-26 1998-10-07 JLG Industries, Inc. Gerät und Verfahren zum Steuern eines Scherenhebers
EP1081089A1 (de) * 1999-08-20 2001-03-07 Bison stematec, Maschinenbau- und Hubarbeitsbühnen Produktionsgesellschaft mbH Verfahren zur automatischen Reichweitenbegrenzung bei Hubarbeitsbühnen
WO2002018264A1 (de) * 2000-08-30 2002-03-07 Pat Gmbh Redundantes sicherheitssystem eines fahrzeuges
EP1186568A1 (de) * 2000-09-12 2002-03-13 Pinguely-Haulotte Hubarbeitsbühne und Verfahren zum Steuern einer sich darauf befindenden Last
WO2005092778A1 (en) * 2004-02-26 2005-10-06 Jlg Industries, Inc. Lift vehicle with multiple capacity envelope control system and method
EP1619161A1 (de) * 2004-07-22 2006-01-25 J.C. Bamford Excavators Limited Verfahren zur und Maschine mit Vorrichtung zur Begrenzung der Reichweite des Auslegers
DE10032423B4 (de) * 2000-07-04 2007-10-18 Palfinger Europe Gmbh Fahrbare Hubarbeitsbühne
FR2908119A1 (fr) * 2006-11-07 2008-05-09 Haulotte Group Sa Nacelle elevatrice et procede de commande d'une telle nacelle
FR2908120A1 (fr) * 2006-11-07 2008-05-09 Haulotte Group Sa Nacelle elevatrice et procede de surveillance d'une telle nacelle a l'arret
RU2500608C2 (ru) * 2011-05-03 2013-12-10 Камиль Мамаевич Мамаев Способ автоматической защиты автокрана от опрокидывания и перегрузок с управлением скоростями приводов и устройство для его реализации
CN115321438A (zh) * 2022-08-30 2022-11-11 北谷电子有限公司 一种高空作业平台的超载检测方法和高空作业平台

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1756844A1 (de) * 1968-05-27 1970-08-20 Schwermaschb S M Kirow Veb Justageeinrichtung fuer Lastmomentensicherungen und Pruefbelastungen an ortsveraenderlichen Drehkranen
DE2013388A1 (de) * 1969-11-20 1971-11-04 Ludwig Pietzsch Verfahren und Vorrichtung zur Überprüfung einer Überlastsicherung für Auslegerkrane, insbesondere Teleskopkrane
DE2032968A1 (de) * 1970-07-03 1972-01-13 Krupp Gmbh Einrichtung zur Lastmomentbegrenzung
FR2256101A1 (en) * 1973-12-28 1975-07-25 Biron Didier Telescopic jib crane overload protection system - compares jib angle derricking force with permissible maxima
FR2320894A1 (fr) * 1975-08-14 1977-03-11 Forney International Dispositif de mesure et d'affichage de charge pour une grue a bras de longueur variable
FR2351395A1 (fr) * 1976-05-14 1977-12-09 Pye Electronic Prod Ltd Systeme indicateur de charge
DE2641082A1 (de) * 1976-09-11 1978-03-16 Krupp Gmbh Mobilkranlastmomentbegrenzungseinrichtung
DE2910057A1 (de) * 1979-03-14 1980-09-25 Pietzsch Ludwig Lastmomentbegrenzer fuer einen kran
DE3341287A1 (de) * 1982-12-02 1984-06-07 Krüger GmbH & Co KG, 4300 Essen Lastueberwachungseinrichtung fuer einen auslegerkran
DE3420596A1 (de) * 1984-06-01 1985-12-05 Dr.-Ing. Ludwig Pietzsch Gmbh & Co, 7505 Ettlingen Ueberwachungs- und steuersystem fuer auslegerkrane

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1756844A1 (de) * 1968-05-27 1970-08-20 Schwermaschb S M Kirow Veb Justageeinrichtung fuer Lastmomentensicherungen und Pruefbelastungen an ortsveraenderlichen Drehkranen
DE2013388A1 (de) * 1969-11-20 1971-11-04 Ludwig Pietzsch Verfahren und Vorrichtung zur Überprüfung einer Überlastsicherung für Auslegerkrane, insbesondere Teleskopkrane
DE2032968A1 (de) * 1970-07-03 1972-01-13 Krupp Gmbh Einrichtung zur Lastmomentbegrenzung
FR2256101A1 (en) * 1973-12-28 1975-07-25 Biron Didier Telescopic jib crane overload protection system - compares jib angle derricking force with permissible maxima
FR2320894A1 (fr) * 1975-08-14 1977-03-11 Forney International Dispositif de mesure et d'affichage de charge pour une grue a bras de longueur variable
FR2351395A1 (fr) * 1976-05-14 1977-12-09 Pye Electronic Prod Ltd Systeme indicateur de charge
DE2641082A1 (de) * 1976-09-11 1978-03-16 Krupp Gmbh Mobilkranlastmomentbegrenzungseinrichtung
DE2910057A1 (de) * 1979-03-14 1980-09-25 Pietzsch Ludwig Lastmomentbegrenzer fuer einen kran
DE3341287A1 (de) * 1982-12-02 1984-06-07 Krüger GmbH & Co KG, 4300 Essen Lastueberwachungseinrichtung fuer einen auslegerkran
DE3420596A1 (de) * 1984-06-01 1985-12-05 Dr.-Ing. Ludwig Pietzsch Gmbh & Co, 7505 Ettlingen Ueberwachungs- und steuersystem fuer auslegerkrane

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0353099A2 (de) * 1988-07-29 1990-01-31 Scimitar Instrumentation Limited System zur Überwachung der Tragfähigkeit z.B. bei einem Kran
EP0353099A3 (de) * 1988-07-29 1991-04-17 Scimitar Instrumentation Limited System zur Überwachung der Tragfähigkeit z.B. bei einem Kran
EP0364994A1 (de) * 1988-10-19 1990-04-25 Man Ghh Krantechnik Gmbh Kransteuerung
WO1990004564A1 (de) * 1988-10-19 1990-05-03 Man Ghh Krantechnik Gmbh Kransteuerung
EP0387399A2 (de) * 1989-03-16 1990-09-19 Ppm S.A. Verfahren und Vorrichtung zur Steuerung der Kranfunktionen eines mobilen Teleskopauslegerkrans
EP0387399A3 (de) * 1989-03-16 1991-03-13 Ppm S.A. Verfahren und Vorrichtung zur Steuerung der Kranfunktionen eines mobilen Teleskopauslegerkrans
AU635856B2 (en) * 1990-09-05 1993-04-01 Morita Fire Pump Mfg. Co., Ltd. Apparatus for automatically operating high-place working vehicles
EP0535339A1 (de) * 1991-10-02 1993-04-07 Jlg Industries, Inc. Lastmomentanzeigevorrichtung
DE29500194U1 (de) * 1995-01-10 1996-03-21 Jaresch u. Wegener Inhaber Dirk Jaresch, 44867 Bochum Oberleitungsmontagewagen
EP0786432A3 (de) * 1996-01-26 1998-10-07 JLG Industries, Inc. Gerät und Verfahren zum Steuern eines Scherenhebers
AU710364B2 (en) * 1996-01-26 1999-09-16 Jlg Industries, Inc. Scissor lift control apparatus and method
US5992562A (en) * 1996-01-26 1999-11-30 Jlg Industries, Inc. Scissor lift control apparatus
US6330933B1 (en) 1996-01-26 2001-12-18 Jlg Industries, Inc. Scissor lift control apparatus and method
EP1081089A1 (de) * 1999-08-20 2001-03-07 Bison stematec, Maschinenbau- und Hubarbeitsbühnen Produktionsgesellschaft mbH Verfahren zur automatischen Reichweitenbegrenzung bei Hubarbeitsbühnen
DE10032423B4 (de) * 2000-07-04 2007-10-18 Palfinger Europe Gmbh Fahrbare Hubarbeitsbühne
WO2002018264A1 (de) * 2000-08-30 2002-03-07 Pat Gmbh Redundantes sicherheitssystem eines fahrzeuges
EP1186568A1 (de) * 2000-09-12 2002-03-13 Pinguely-Haulotte Hubarbeitsbühne und Verfahren zum Steuern einer sich darauf befindenden Last
FR2813875A1 (fr) * 2000-09-12 2002-03-15 Pinguely Haulotte Nacelle elevatrice et procede de controle d'une charge embarquee sur une telle nacelle
US8622170B2 (en) 2004-02-26 2014-01-07 Jlg Industries, Inc. Lift vehicle with multiple capacity envelope control system and method
WO2005092778A1 (en) * 2004-02-26 2005-10-06 Jlg Industries, Inc. Lift vehicle with multiple capacity envelope control system and method
EP1619161A1 (de) * 2004-07-22 2006-01-25 J.C. Bamford Excavators Limited Verfahren zur und Maschine mit Vorrichtung zur Begrenzung der Reichweite des Auslegers
FR2908119A1 (fr) * 2006-11-07 2008-05-09 Haulotte Group Sa Nacelle elevatrice et procede de commande d'une telle nacelle
EP1923347A1 (de) * 2006-11-07 2008-05-21 Haulotte Group Hebebühne und Verfahren zur Steuerung einer solchen Hebebühne
FR2908120A1 (fr) * 2006-11-07 2008-05-09 Haulotte Group Sa Nacelle elevatrice et procede de surveillance d'une telle nacelle a l'arret
RU2500608C2 (ru) * 2011-05-03 2013-12-10 Камиль Мамаевич Мамаев Способ автоматической защиты автокрана от опрокидывания и перегрузок с управлением скоростями приводов и устройство для его реализации
CN115321438A (zh) * 2022-08-30 2022-11-11 北谷电子有限公司 一种高空作业平台的超载检测方法和高空作业平台
CN115321438B (zh) * 2022-08-30 2024-06-11 北谷电子股份有限公司 一种高空作业平台的超载检测方法和高空作业平台

Also Published As

Publication number Publication date
IT8719611A0 (it) 1987-03-06
IT1204913B (it) 1989-03-10

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