EP0285710A1 - Dispositif limitateur de portée et/ou de moment pour plates-formes élévatrices - Google Patents
Dispositif limitateur de portée et/ou de moment pour plates-formes élévatrices Download PDFInfo
- 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
- Authority
- 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
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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)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT1961187 | 1987-03-06 | ||
IT19611/87A IT1204913B (it) | 1987-03-06 | 1987-03-06 | Dispositivo limitatore di sbraccio e/o di momento per piataforme elevatrici |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0285710A1 true EP0285710A1 (fr) | 1988-10-12 |
Family
ID=11159562
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87201519A Ceased EP0285710A1 (fr) | 1987-03-06 | 1987-08-11 | Dispositif limitateur de portée et/ou de moment pour plates-formes élévatrices |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0285710A1 (fr) |
IT (1) | IT1204913B (fr) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0353099A2 (fr) * | 1988-07-29 | 1990-01-31 | Scimitar Instrumentation Limited | Système moniteur de la limite de charge par exemple d'une grue |
EP0364994A1 (fr) * | 1988-10-19 | 1990-04-25 | Man Ghh Krantechnik Gmbh | Commande de grue |
EP0387399A2 (fr) * | 1989-03-16 | 1990-09-19 | Ppm S.A. | Procédé et dispositif pour la commande des fonctions d'une grue mobile à flèche télescopique |
AU635856B2 (en) * | 1990-09-05 | 1993-04-01 | Morita Fire Pump Mfg. Co., Ltd. | Apparatus for automatically operating high-place working vehicles |
EP0535339A1 (fr) * | 1991-10-02 | 1993-04-07 | Jlg Industries, Inc. | Système indicateur de couple de charge |
DE29500194U1 (de) * | 1995-01-10 | 1996-03-21 | Jaresch u. Wegener Inhaber Dirk Jaresch, 44867 Bochum | Oberleitungsmontagewagen |
EP0786432A3 (fr) * | 1996-01-26 | 1998-10-07 | JLG Industries, Inc. | Dispositif et méthode de commande d'un élévateur à ciseaux |
EP1081089A1 (fr) * | 1999-08-20 | 2001-03-07 | Bison stematec, Maschinenbau- und Hubarbeitsbühnen Produktionsgesellschaft mbH | Procédé pour limiter automatiguement la portée de plateformes de travail élévatrices |
WO2002018264A1 (fr) * | 2000-08-30 | 2002-03-07 | Pat Gmbh | Systeme de securite redondant d'un vehicule |
EP1186568A1 (fr) * | 2000-09-12 | 2002-03-13 | Pinguely-Haulotte | Nacelle élévatrice et procédé de contrôle d'une charge embarquée sur une telle nacelle |
WO2005092778A1 (fr) * | 2004-02-26 | 2005-10-06 | Jlg Industries, Inc. | Vehicule elevateur a systeme de commande a enveloppes multiples et capacites multiples et procede associe |
EP1619161A1 (fr) * | 2004-07-22 | 2006-01-25 | J.C. Bamford Excavators Limited | Procédé et machine avec dispositif pour limiter la portée de flèche |
DE10032423B4 (de) * | 2000-07-04 | 2007-10-18 | Palfinger Europe Gmbh | Fahrbare Hubarbeitsbühne |
FR2908120A1 (fr) * | 2006-11-07 | 2008-05-09 | Haulotte Group Sa | Nacelle elevatrice et procede de surveillance d'une telle nacelle a l'arret |
FR2908119A1 (fr) * | 2006-11-07 | 2008-05-09 | Haulotte Group Sa | Nacelle elevatrice et procede de commande d'une telle nacelle |
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)
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 |
-
1987
- 1987-03-06 IT IT19611/87A patent/IT1204913B/it active
- 1987-08-11 EP EP87201519A patent/EP0285710A1/fr not_active Ceased
Patent Citations (10)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0353099A2 (fr) * | 1988-07-29 | 1990-01-31 | Scimitar Instrumentation Limited | Système moniteur de la limite de charge par exemple d'une grue |
EP0353099A3 (fr) * | 1988-07-29 | 1991-04-17 | Scimitar Instrumentation Limited | Système moniteur de la limite de charge par exemple d'une grue |
EP0364994A1 (fr) * | 1988-10-19 | 1990-04-25 | Man Ghh Krantechnik Gmbh | Commande de grue |
WO1990004564A1 (fr) * | 1988-10-19 | 1990-05-03 | Man Ghh Krantechnik Gmbh | Systeme de commande de grues |
EP0387399A2 (fr) * | 1989-03-16 | 1990-09-19 | Ppm S.A. | Procédé et dispositif pour la commande des fonctions d'une grue mobile à flèche télescopique |
EP0387399A3 (fr) * | 1989-03-16 | 1991-03-13 | Ppm S.A. | Procédé et dispositif pour la commande des fonctions d'une grue mobile à flèche télescopique |
AU635856B2 (en) * | 1990-09-05 | 1993-04-01 | Morita Fire Pump Mfg. Co., Ltd. | Apparatus for automatically operating high-place working vehicles |
EP0535339A1 (fr) * | 1991-10-02 | 1993-04-07 | Jlg Industries, Inc. | Système indicateur de couple de charge |
DE29500194U1 (de) * | 1995-01-10 | 1996-03-21 | Jaresch u. Wegener Inhaber Dirk Jaresch, 44867 Bochum | Oberleitungsmontagewagen |
EP0786432A3 (fr) * | 1996-01-26 | 1998-10-07 | JLG Industries, Inc. | Dispositif et méthode de commande d'un élévateur à ciseaux |
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 (fr) * | 1999-08-20 | 2001-03-07 | Bison stematec, Maschinenbau- und Hubarbeitsbühnen Produktionsgesellschaft mbH | Procédé pour limiter automatiguement la portée de plateformes de travail élévatrices |
DE10032423B4 (de) * | 2000-07-04 | 2007-10-18 | Palfinger Europe Gmbh | Fahrbare Hubarbeitsbühne |
WO2002018264A1 (fr) * | 2000-08-30 | 2002-03-07 | Pat Gmbh | Systeme de securite redondant d'un vehicule |
EP1186568A1 (fr) * | 2000-09-12 | 2002-03-13 | Pinguely-Haulotte | Nacelle élévatrice et procédé de contrôle d'une charge embarquée sur une telle nacelle |
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 (fr) * | 2004-02-26 | 2005-10-06 | Jlg Industries, Inc. | Vehicule elevateur a systeme de commande a enveloppes multiples et capacites multiples et procede associe |
EP1619161A1 (fr) * | 2004-07-22 | 2006-01-25 | J.C. Bamford Excavators Limited | Procédé et machine avec dispositif pour limiter la portée de flèche |
FR2908120A1 (fr) * | 2006-11-07 | 2008-05-09 | Haulotte Group Sa | Nacelle elevatrice et procede de surveillance d'une telle nacelle a l'arret |
EP1923347A1 (fr) * | 2006-11-07 | 2008-05-21 | Haulotte Group | Nacelle élévatrice et procédé de commande d'une telle nacelle |
FR2908119A1 (fr) * | 2006-11-07 | 2008-05-09 | Haulotte Group Sa | Nacelle elevatrice et procede de commande d'une telle nacelle |
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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Inventor name: BERTOLA, ALLESANDRO Inventor name: BELTRAMI, GIOVANNI Inventor name: BONETTI, GIANMARCO |