EP1466862B1 - Levelling device and levelling method for a workbasket of an elevating work platform - Google Patents
Levelling device and levelling method for a workbasket of an elevating work platform Download PDFInfo
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- EP1466862B1 EP1466862B1 EP03008176A EP03008176A EP1466862B1 EP 1466862 B1 EP1466862 B1 EP 1466862B1 EP 03008176 A EP03008176 A EP 03008176A EP 03008176 A EP03008176 A EP 03008176A EP 1466862 B1 EP1466862 B1 EP 1466862B1
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- Prior art keywords
- basket
- working
- rotary
- inclination
- jib
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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
- 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
Definitions
- the invention relates to a method for leveling a work platform of an aerial work platform and a mobile or non-mobile working platform comprising a leveling device for carrying out the method.
- US-A-4 476 955 describes a leveling device for a working platform of a mobile working platform.
- the work basket is attached to a basket carrier, which is movably connected via a rotary joint with a Korbarm.
- a leveling cylinder is arranged, wherein the leveling cylinder is connected to a chain drive for moving a guide roller and the deflection roller is in operative connection with the pivot, such that is moved by the control of the leveling cylinder of the basket carrier and the work basket in approximately horizontal and / or vertical orientation is maintained.
- DE 34 46 491 C2 discloses an aerial work platform with a hydraulic leveling device in which a hinged platform is pivotally mounted relative to a hinged platform with a leveling device.
- the leveling device comprises a hydraulic cylinder connected to the working platform with safety valves and a reserve auxiliary pump for the hydraulic medium that can be connected to it.
- the leveling device has the task regardless of the respective inclination of the boom to hold the platform for the safety of the persons therein horizontal, with a maximum inclination of 5 ° relative to the horizontal plane is permitted.
- basket leveling systems are known for mobile aerial work platforms with at least two boom systems.
- a basket carrier may be arranged on the arms so-called parallel linkage, which are connected to a basket carrier and on the actuation of the work basket in the horizontal position is held.
- cantilever systems are not telescopic.
- telescopic boom systems of aerial work platforms leveling systems are known in which a leveling cylinder is directly connected to a pivot of a basket carrier. By actuating the leveling cylinder, a corresponding horizontal alignment of the basket carrier and the attached working basket.
- a disadvantage of this solution is that relatively small rotation angle are achieved and the motion compensation is unevenly carried out by corresponding non-uniform cylinder movements.
- leveling systems are known in which the rotary transmission is controlled directly, whereby by the rotation of the rotary gear a corresponding horizontal alignment of the basket carrier and the corresponding working basket done.
- a sensor arranged on the working basket determines the deviation from the horizontal position and outputs corresponding control signals to a control device which controls either the leveling cylinder or the rotary gear.
- a disadvantage of the known leveling is that on the one hand only very small rotation angle to compensate for the inclination of the working basket can be realized from the horizontal and on the other hand, the compensating movements take place unevenly.
- An inventive method for leveling a working basket of an aerial work platform with respect to a Korbarm at one end of the work basket is movably mounted, and / or against a boom comprises the following steps: a) detecting the inclination of the working basket relative to the horizontal and / or vertical by means of at least a tilt sensor arranged on the work basket and / or b) detecting the inclination of the work basket relative to the horizontal and / or the vertical by means of a first rotary sensor arranged between a turret and the arm and by means of a second rotary sensor arranged between the arm and the basket for determining the respective one Angle between the turret and the boom and the boom and the Korbarm, wherein the addition of the angle represents the inclination of the working basket relative to the horizontal and / or the vertical; c) transmission of the signals or data determined by the inclination sensor and / or the rotation sensors by means of one or more signal or data lines to at least one evaluation and control unit and d) control of at least one
- the first inclination sensor and / or the rotation sensors and / or the evaluation and control unit outputs a signal for switching off the working platform and / or a warning signal when a predefined inclination of the working basket and / or the telescopic boom is exceeded.
- a mobile or non-mobile aerial work platform comprising a leveling device for performing the above-mentioned leveling and a work cage at least one leveling cylinder is arranged within a Korbarms, wherein the leveling cylinder is connected to at least one chain drive for moving a first guide roller and the first guide roller with a hinge is operatively connected to move a basket carrier, such that is moved over the control of the leveling cylinder of the basket carrier and the work basket is held in approximately horizontal and / or vertical orientation.
- this construction allows rotation angles of up to 270 °. This advantageously results in a very large compensation area for the work basket. It is also ensured that the same leveling cylinder forces attack at the same basket load in all Drehwinkeignaen.
- at least one inclination sensor for detecting the inclination of the working basket relative to the horizontal and / or the vertical can be arranged on the work basket, wherein the inclination sensor is connected via a signal or data line with an evaluation and control unit and the evaluation and control unit in dependence from the signals or determined data of the inclination sensor control signals transmitted to the leveling cylinder, such that the work basket is held by means of the leveling cylinder and the chain drive in the approximately horizontal and / or vertical orientation.
- the arrangement of the tilt sensor on the work basket allows the determination of the current tilt angle of the work basket and the corresponding correction by the leveling device. But it is also possible that between a turret and a boom of the aerial work platform, a first rotation sensor and between the boom and the Korbarm a second rotation sensor for determining the respective angle between the turret and the boom and the boom and the Korbarm are arranged. In this case, the addition of the angle represents the inclination of the working basket relative to the horizontal and / or the vertical.
- the rotational sensors are in each case via a signal or data line connected to an evaluation and control unit, wherein the evaluation and control unit transmits control signals to the leveling cylinder as a function of the signals or determined data of the rotary sensors, such that the Azbeitskorb means of the leveling cylinder and the chain drive in the approximately horizontal and / or vertical orientation is held.
- the leveling device has a combination of said tilt sensor on the work basket as well as the two rotary sensors.
- the tilt sensor and / or the rotation sensors and / or the evaluation and control unit when exceeding a predefined slope of the working basket and / or the jib and / or the Korbarms are a control signal for switching off Lifting platform and / or a warning signal.
- the chain drive has at least one chain tensioning device.
- FIG. 1 shows a schematic representation of a leveling device 10 for a working cage 56 of a mobile or non-mobile working platform.
- the work basket 56 is attached to a basket carrier 24, wherein the basket carrier 24 is connected via a pivot joint 26 with a Korbarm 16 movable.
- a leveling cylinder 38 is arranged and the leveling cylinder 38 is connected to a chain drive for moving a first deflection roller via a connecting element 40.
- the chain drive 34 runs around between the first deflection roller 28 and a third deflection roller 32, which is likewise arranged within the cage 16.
- a second deflection roller 30 is arranged, which serves as a guide and tensioning roller.
- first deflecting roller 28 is operatively connected to the pivot 26, such that, via the control of the leveling cylinder 38, the basket carrier 24 is moved and the working basket 56 is held in approximately horizontal and / or vertical orientation.
- the resulting there in this construction maximum rotation angle ⁇ max is about 270 °.
- the Korbarm 16 is telescopically formed and from an outer first Korbarm 18, an inner running second Korbarm 20 and disposed within the second Korbarms 20 third Korbarm 22, is formed at the end of the pivot joint 26 is formed (see also Figure 2).
- a tilt sensor 42 for detecting the inclination of the working basket 56 relative to the horizontal and / or the vertical is arranged.
- the inclination sensor 42 is connected via a signal or data line (not shown) to an evaluation and control unit (not shown).
- the evaluation and control unit transmits control signals to the leveling cylinder 38 as a function of the signals or determined data of the tilt sensor 42, such that the work basket 56 is held in approximately horizontal and / or vertical alignment by means of the leveling cylinder 38 and the chain drive 34.
- FIG. 1 The construction of a mobile or non-mobile working platform illustrated in FIG. 1 shows a turret 12, which is movably connected via a first articulated connection 52 to a telescopic arm 14 consisting of a first arm 48 and an inner second arm 50.
- the boom 14 is connected via a second articulated connection with the Korbarm 16, which is also telescopic, movably connected.
- FIG. 3 shows a schematic representation of a leveling device 10 according to a second embodiment. It can be seen that between the turret 12 and the boom 14 of the aerial work platform, a first rotation sensor 44 and between the boom 14 and the Korbarm 16, a second rotation sensor 46 for determining the respective angle ⁇ 1, ⁇ 2 between the turret 14 and the boom 14 and the boom 14 and the basket bar 16 are arranged. The addition of the angle ⁇ 1, ⁇ 2 results in the inclination of the working basket 56 with respect to the horizontal and / or the vertical.
- the rotation sensors 44, 46 are each connected via a signal or data line to an evaluation and control unit (not shown).
- the evaluation and control unit transmits corresponding control signals to the leveling cylinder 38 as a function of the signals or determined data of the rotation sensors 44, 46 such that the work basket 56 is held in approximately horizontal and / or vertical alignment by means of the leveling cylinder 38 and the chain drive 34 becomes.
- the chain drive 34 is in turn connected via a connecting element 40 with the leveling cylinder 38.
- the boom 14 and the Korbarm 16 are in turn made telescopic.
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Abstract
Description
Die Erfindung betrifft ein Verfahren zur Nivellierung eines Arbeitskorbs einer Hubarbeitsbühne und eine fahrbare oder nicht-fahrbare Hubarbeitsbühne umfassend eine Nivelliervorrichtung zur Durchführung des Verfahrens.The invention relates to a method for leveling a work platform of an aerial work platform and a mobile or non-mobile working platform comprising a leveling device for carrying out the method.
Hubarbeitsbühnen mit Nivelliervorrichtungen und entsprechende Verfahren sind zum Beispiel aus der WO-A-02 18264 oder der US-A-4 476 955 bekannt. So beschreibt die US-A-4 476 955 eine Nivelliervorrichtung für einen Arbeitskorb einer fahrbaren Hubarbeitsbühne. Der Arbeitskorb ist dabei an einem Korbträger angebracht, wobei dieser über ein Drehgelenk mit einem Korbarm beweglich verbunden ist. Innerhalb des Korbarms ist ein Nivellierzylinder angeordnet, wobei der Nivellierzylinder mit einem Kettentrieb zum Bewegen einer Umlenkrolle verbunden ist und die Umlenkrolle mit dem Drehgelenk in Wirkverbindung steht, derart, dass über die Steuerung des Nivellierzylinders der Korbträger bewegt wird und der Arbeitskorb in ungefähr horizontaler und/oder senkrechter Ausrichtung gehalten wird. Die DE 34 46 491 C2 offenbart eine Hubarbeitsbühne mit hydraulischer Nivelliervorrichtung bei der an einem neigungsverstellbaren Ausleger relativ dazu schwenkbar eine angelenkte Arbeitsbühne mit einer Nivelliervorrichtung angeordnet ist. Die Nivelliervorrichtung umfasst dabei einen mit der Arbeitsbühne verbundenen Hydraulikzylinder mit Sicherungsventilen sowie eine damit verbindbare Reserve-Hilfspumpe für das Hydraulikmittel. Die Nivelliervorrichtung hat die Aufgabe, unabhängig von der jeweiligen Neigung des Auslegers die Arbeitsbühne zur Sicherheit der darin befindlichen Personen horizontal zu halten, wobei eine maximale Neigung von 5° relativ zur Horizontalebene zulässig ist. Des Weiteren sind Systeme zur Korbnivellierung bei fahrbaren Hubarbeitsbühnen mit mindestens zwei Auslegersystemen bekannt. Zum Beispiel können an den Auslegern sogenannte Parallelgestänge angeordnet sein, die mit einem Korbträger verbunden sind und über deren Betätigung der Arbeitskorb in der horizontalen Stellung gehalten wird. Hierbei ist jedoch nachteilig, dass derartige Auslegersysteme nicht teleskopierbar sind. Bei teleskopierbaren Auslegersystemen von Hubarbeitsbühnen sind Nivelliersysteme bekannt, bei denen ein Nivellierzylinder direkt mit einem Drehgelenk eines Korbträgers verbunden ist. Durch die Betätigung des Nivellierzylinders erfolgt eine entsprechende horizontale Ausrichtung des Korbträgers und des daran befestigten Arbeitskorbes. Nachteilig an dieser Lösung ist jedoch, dass relativ kleine Drehwinkel erreicht werden und der Bewegungsausgleich ungleichmäßig durch entsprechende ungleichmäßige Zylinderbewegungen erfolgt. Zudem sind Nivelliersysteme bekannt, bei denen das Drehgetriebe direkt angesteuert wird, wobei durch die Drehung des Drehgetriebes eine entsprechende horizontale Ausrichtung des Korbträgers und des entsprechenden Arbeitskorbes erfolgen. Bei den beiden zuletzt genannten bekannten Systemen ermittelt ein am Arbeitskorb angeordneter Sensor die Abweichung von der waagerechten Stellung und gibt entsprechende Steuersignale an eine Steuervorrichtung ab, die entweder den Nivellierzylinder oder das Drehgetriebe steuert.Lifting platforms with leveling devices and corresponding methods are known, for example, from WO-A-02 18264 or US-A-4 476 955. Thus, US-A-4 476 955 describes a leveling device for a working platform of a mobile working platform. The work basket is attached to a basket carrier, which is movably connected via a rotary joint with a Korbarm. Within the Korbarms a leveling cylinder is arranged, wherein the leveling cylinder is connected to a chain drive for moving a guide roller and the deflection roller is in operative connection with the pivot, such that is moved by the control of the leveling cylinder of the basket carrier and the work basket in approximately horizontal and / or vertical orientation is maintained. DE 34 46 491 C2 discloses an aerial work platform with a hydraulic leveling device in which a hinged platform is pivotally mounted relative to a hinged platform with a leveling device. The leveling device comprises a hydraulic cylinder connected to the working platform with safety valves and a reserve auxiliary pump for the hydraulic medium that can be connected to it. The leveling device has the task regardless of the respective inclination of the boom to hold the platform for the safety of the persons therein horizontal, with a maximum inclination of 5 ° relative to the horizontal plane is permitted. Furthermore, basket leveling systems are known for mobile aerial work platforms with at least two boom systems. For example, may be arranged on the arms so-called parallel linkage, which are connected to a basket carrier and on the actuation of the work basket in the horizontal position is held. However, it is disadvantageous that such cantilever systems are not telescopic. In telescopic boom systems of aerial work platforms leveling systems are known in which a leveling cylinder is directly connected to a pivot of a basket carrier. By actuating the leveling cylinder, a corresponding horizontal alignment of the basket carrier and the attached working basket. A disadvantage of this solution, however, is that relatively small rotation angle are achieved and the motion compensation is unevenly carried out by corresponding non-uniform cylinder movements. In addition, leveling systems are known in which the rotary transmission is controlled directly, whereby by the rotation of the rotary gear a corresponding horizontal alignment of the basket carrier and the corresponding working basket done. In the two last-mentioned known systems, a sensor arranged on the working basket determines the deviation from the horizontal position and outputs corresponding control signals to a control device which controls either the leveling cylinder or the rotary gear.
Nachteilig an den bekannten Nivellierverfahren ist jedoch, dass einerseits nur sehr kleine Drehwinkel zum Ausgleich der Schrägstellung des Arbeitskorbes aus der Horizontalen verwirklicht werden können und andererseits die Ausgleichsbewegungen ungleichmäßig erfolgen.A disadvantage of the known leveling, however, is that on the one hand only very small rotation angle to compensate for the inclination of the working basket can be realized from the horizontal and on the other hand, the compensating movements take place unevenly.
Es ist daher Aufgabe der vorliegenden Erfindung, ein Nivellierverfahren und eine fahrbare oder nicht-fahrbare Hubarbeitsbühne umfassend eine Nivelliervorrichtung zur Durchführung des Verfahrens der eingangs genannten Art bereitzustellen, welche einerseits große Drehwinkel für den Ausgleich von Abweichungen aus der Horizontalen und/oder der Senkrechten eines Arbeitskorbes der Hubarbeitsbühne bereitstellen und bei denen andererseits die Ausgleichsbewegungen gleichmäßig erfolgen.It is therefore an object of the present invention to provide a leveling method and a mobile or non-mobile working platform comprising a leveling device for carrying out the method of the type mentioned, on the one hand large rotation angle for the compensation of deviations from the horizontal and / or the vertical of a work basket provide the working platform and on the other hand, the compensating movements are made evenly.
Gelöst wird diese Aufgabe durch ein gattungsgemäßes Verfahren und eine fahrbare oder nicht-fahrbare Hubarbeitsbühne gemäß den Merkmalen der Ansprüche 1 und 3.This object is achieved by a generic method and a mobile or non-mobile aerial work platform according to the features of claims 1 and 3.
Vorteilhafte Ausgestaltungen sind in den Unteransprüchen beschrieben.Advantageous embodiments are described in the subclaims.
Ein erfindungsgemäßes Verfahren zur Nivellierung eines Arbeitskorbes einer Hubarbeitsbühne gegenüber einem Korbarm, an dessen einem Ende der Arbeitskorb beweglich befestigt ist, und/oder gegenüber einem Ausleger umfasst folgende Schritte: a) Erfassen der Neigung des Arbeitskorbes gegenüber der Horizontalen und/oder der Vertikalen mittels mindestens einem am Arbeitskorb angeordneten Neigungssensor und/oder b) Erfassen der Neigung des Arbeitskorbes gegenüber der Horizontalen und/oder der Vertikalen mittels einem zwischen einem Drehturm und dem Ausleger angeordneten ersten Drehsensor und mittels einem zwischen dem Ausleger und dem Korbarm angeordneten zweiten Drehsensor zur Ermittelung der jeweiligen Winkel zwischen dem Drehturm und dem Ausleger sowie dem Ausleger und dem Korbarm, wobei die Addition der Winkel die Neigung des Arbeitskorbes gegenüber der Horizontalen und/oder der Vertikalen darstellt; c) Übermittelung der durch den Neigungssensor und/oder die Drehsensoren ermittelten Signale beziehungsweise Daten mittels einer oder mehrerer Signal- beziehungsweise Datenleitungen an mindestens eine Auswerte- und Steuereinheit sowie d) Steuerung von mindestens einem Nivellierzylinder mit Hilfe der Auswerte- und Steuereinheit in Abhängigkeit von den Signalen beziehungsweise ermittelten Daten des Neigungssensors und/oder der Drehsensoren, wobei der Nivellierzylinder mit mindestens einem Kettentrieb zum Bewegen einer ersten Umlenkrolle verbunden ist und die erste Umlenkrolle mit einem Drehgelenk in Wirkverbindung steht, derart, dass über die Steuerung des Nivellierzylinders ein Korbträger des Arbeitskorbes bewegt wird und der Arbeitskorb in ungefähr horizontaler und/oder senkrechter Ausrichtung gehalten wird.An inventive method for leveling a working basket of an aerial work platform with respect to a Korbarm at one end of the work basket is movably mounted, and / or against a boom comprises the following steps: a) detecting the inclination of the working basket relative to the horizontal and / or vertical by means of at least a tilt sensor arranged on the work basket and / or b) detecting the inclination of the work basket relative to the horizontal and / or the vertical by means of a first rotary sensor arranged between a turret and the arm and by means of a second rotary sensor arranged between the arm and the basket for determining the respective one Angle between the turret and the boom and the boom and the Korbarm, wherein the addition of the angle represents the inclination of the working basket relative to the horizontal and / or the vertical; c) transmission of the signals or data determined by the inclination sensor and / or the rotation sensors by means of one or more signal or data lines to at least one evaluation and control unit and d) control of at least one leveling cylinder with the aid of the evaluation and control unit in dependence on the Signals or determined data of the inclination sensor and / or the rotary sensors, wherein the leveling cylinder is connected to at least one chain drive for moving a first guide roller and the first guide roller is in operative connection with a rotary joint, such that moves a basket carrier of the working basket via the control of the leveling cylinder and the work basket is held in approximately horizontal and / or vertical orientation.
In einer vorteilhaften Ausgestaltung des erfindungsgemäßen Verfahrens gibt der erste Neigungssensor und/oder die Drehsensoren und/oder die Auswerte- und Steuereinheit beim Überschreiten einer vordefinierten Neigung des Arbeitskorbes und/oder des Teleskopauslegers ein Signal zum Abschalten der Hubarbeitsbühne und/oder ein Warnsignal ab.In an advantageous embodiment of the method according to the invention, the first inclination sensor and / or the rotation sensors and / or the evaluation and control unit outputs a signal for switching off the working platform and / or a warning signal when a predefined inclination of the working basket and / or the telescopic boom is exceeded.
Bei einer fahrbaren oder nicht-fahrbaren Hubarbeitsbühne umfassend eine Nivelliervorrichtung zur Durchführung des oben genannten Nivellierverfahrens und einen Arbeitskorb ist innerhalb eines Korbarms mindestens ein Nivellierzylinder angeordnet, wobei der Nivellierzylinder mit mindestens einem Kettentrieb zum Bewegen einer ersten Umlenkrolle verbunden ist und die erste Umlenkrolle mit einem Drehgelenk zur Bewegung eines Korbträgers in Wirkverbindung steht, derart, dass über die Steuerung des Nivellierzylinders der Korbträger bewegt wird und der Arbeitskorb in ungefähr horizontaler und/oder senkrechter Ausrichtung gehalten wird. Durch diese Anordnung ist gewährleistet, dass es zu einer gleichförmigen Drehbewegung des Drehgelenkes bei gleicher Ausschub- und/oder Einschubgeschwindigkeit des Nivellierzylinders kommt. Ruckartige Lageänderungen des Arbeitskorbes werden dadurch sicher vermieden. Zudem erlaubt diese Konstruktion Drehwinkel von bis zu 270°. Dadurch ergibt sich vorteilhafterweise ein sehr großer Ausgleichsbereich für den Arbeitskorb. Es ist zudem gewährleistet, dass gleiche Nivellierzylinderkräfte bei gleicher Korbbelastung in allen Drehwinkeistellungen angreifen. Dabei kann an dem Arbeitskorb mindestens ein Neigungssensor zum Erfassen der Neigung des Arbeitskorbes gegenüber der Horizontalen und/oder der Vertikalen angeordnet sein, wobei der Neigungssensor über eine Signal- beziehungsweise Datenleitung mit einer Auswerte- und Steuereinheit verbunden ist und die Auswerte- und Steuereinheit in Abhängigkeit von den Signalen beziehungsweise ermittelten Daten des Neigungssensors Steuersignale an den Nivellierzylinder übermittelt, derart, dass der Arbeitskorb mittels dem Nivellierzylinder und dem Kettentrieb in der ungefähr horizontalen und/oder senkrechten Ausrichtung gehalten wird. Die Anordnung des Neigungssensors an dem Arbeitskorb ermöglicht die Feststellung des aktuellen Neigungswinkels des Arbeitskorbes und die entsprechende Korrektur durch die Nivelliervorrichtung. Es ist aber auch möglich, dass zwischen einem Drehturm und einem Ausleger der Hubarbeitsbühne ein erster Drehsensor und zwischen dem Ausleger und dem Korbarm ein zweiter Drehsensor zur Ermittlung der jeweiligen Winkel zwischen dem Drehturm und dem Ausleger sowie dem Ausleger und dem Korbarm angeordnet sind. Dabei stellt die Addition der Winkel die Neigung des Arbeitskorbes gegenüber der Horizontalen und/oder der Vertikalen dar. Die Drehsensoren sind dabei jeweils über eine Signal- beziehungsweise Datenleitung mit einer Auswerte- und Steuereinheit verbunden, wobei die Auswerte- und Steuereinheit in Abhängigkeit von den Signalen beziehungsweise ermittelten Daten der Drehsensoren Steuersignale an den Nivellierzylinder übermittelt, derart, dass der Azbeitskorb mittels dem Nivellierzylinder und dem Kettentrieb in der ungefähr horizontalen und/oder senkrechten Ausrichtung gehalten wird. Durch eine derartige Ausgestaltung zweier Drehsensoren ist eine indirekte Messung der möglichen Neigung des Arbeitskorbes gegenüber der Horizontalen und/oder Senkrechten möglich. Es ist aber auch möglich, dass die Nivelliervorrichtung eine Kombination aus dem genannten Neigungssensor am Arbeitskorb wie auch den beiden Drehsensoren aufweist.In a mobile or non-mobile aerial work platform comprising a leveling device for performing the above-mentioned leveling and a work cage at least one leveling cylinder is arranged within a Korbarms, wherein the leveling cylinder is connected to at least one chain drive for moving a first guide roller and the first guide roller with a hinge is operatively connected to move a basket carrier, such that is moved over the control of the leveling cylinder of the basket carrier and the work basket is held in approximately horizontal and / or vertical orientation. By this arrangement it is ensured that there is a uniform rotational movement of the rotary joint at the same Ausschub- and / or insertion speed of the leveling cylinder. Jerky changes in position of the working basket are thereby safely avoided. In addition, this construction allows rotation angles of up to 270 °. This advantageously results in a very large compensation area for the work basket. It is also ensured that the same leveling cylinder forces attack at the same basket load in all Drehwinkeistellungen. In this case, at least one inclination sensor for detecting the inclination of the working basket relative to the horizontal and / or the vertical can be arranged on the work basket, wherein the inclination sensor is connected via a signal or data line with an evaluation and control unit and the evaluation and control unit in dependence from the signals or determined data of the inclination sensor control signals transmitted to the leveling cylinder, such that the work basket is held by means of the leveling cylinder and the chain drive in the approximately horizontal and / or vertical orientation. The arrangement of the tilt sensor on the work basket allows the determination of the current tilt angle of the work basket and the corresponding correction by the leveling device. But it is also possible that between a turret and a boom of the aerial work platform, a first rotation sensor and between the boom and the Korbarm a second rotation sensor for determining the respective angle between the turret and the boom and the boom and the Korbarm are arranged. In this case, the addition of the angle represents the inclination of the working basket relative to the horizontal and / or the vertical. The rotational sensors are in each case via a signal or data line connected to an evaluation and control unit, wherein the evaluation and control unit transmits control signals to the leveling cylinder as a function of the signals or determined data of the rotary sensors, such that the Azbeitskorb means of the leveling cylinder and the chain drive in the approximately horizontal and / or vertical orientation is held. By such a configuration of two rotary sensors, an indirect measurement of the possible inclination of the working basket with respect to the horizontal and / or vertical is possible. But it is also possible that the leveling device has a combination of said tilt sensor on the work basket as well as the two rotary sensors.
In einer weiteren vorteilhaften Ausgestaltung der fahrbaren oder nicht-fahrbaren Hubarbeitsbühne gibt der Neigungssensor und/oder die Drehsensoren und/oder die Auswerte- und Steuereinheit beim Überschreiten einer vordefinierten Neigung des Arbeitskorbes und/oder des Auslegers und/oder des Korbarms ein Steuersignal zum Abschalten der Hubarbeitsbühne und/oder ein Warnsignal ab. Dadurch ist gewährleistet, dass die Hubarbeitsbühne vor Erreichen einer extremen und nicht mehr ausgleichbaren Stellung des Arbeitskorbes oder anderer Elemente der Hubarbeitsbühne abgeschaltet wird. Auch der manuelle rechtzeitige Eingriff wird durch die Abgabe des Warnsignals ermöglicht. In einer weiteren vorteilhaften Ausgestaltung der fahrbaren oder nicht-fahrbaren Hubarbeitsbühne weist der Kettentrieb mindestens eine Kettenspannvorrichtung auf. Dadurch ist eine gleichmäßige und gleichbleibende Kraftübertragung von dem Nivellierzylinder auf das Drehgetriebe möglich, da der Kettentrieb beziehungsweise die Spannung des Kettentriebs regulierbar ist.In a further advantageous embodiment of the mobile or non-mobile working platform, the tilt sensor and / or the rotation sensors and / or the evaluation and control unit when exceeding a predefined slope of the working basket and / or the jib and / or the Korbarms are a control signal for switching off Lifting platform and / or a warning signal. This ensures that the aerial work platform is switched off before reaching an extreme and irreconcilable position of the working basket or other elements of the aerial work platform. Also the manual timely intervention is made possible by the delivery of the warning signal. In a further advantageous embodiment of the mobile or non-mobile working platform, the chain drive has at least one chain tensioning device. As a result, a uniform and constant power transmission from the leveling cylinder to the rotary transmission is possible, since the chain drive or the tension of the chain drive can be regulated.
Weitere Einzelheiten, Merkmale und Vorteile der fahrbaren oder nicht-fahrbaren Hubarbeitsbühne umfassend eine Nivelliervorrichtung zur Durchführung des erfindungsgemäßen Nivellierverfahrens ergeben sich aus der folgenden Beschreibung eines zeichnerisch dargestellten Ausführungsbeispieles.Further details, features and advantages of the mobile or non-mobile aerial work platform comprising a leveling device for carrying out the leveling method according to the invention will become apparent from the following description of an exemplary embodiment shown in the drawing.
Es zeigen
- Figur 1
- eine schematische Darstellung einer fahrbaren oder nicht-fahrbaren Hubarbeitsbühne mit einer Nivelliervorrichtung gemäß einer ersten Ausführungsform;
- Figur 2
- eine Detailansicht der Nivelliervorrichtung gemäß Figur 1; und
- Figur 3
- eine schematische Darstellung einer fahrbaren oder nicht-fahrbaren Hubarbeitsbühne mit einer Nivelliervorrichtung gemäß einer zweiten Ausführungsform.
- FIG. 1
- a schematic representation of a mobile or non-mobile aerial work platform with a leveling device according to a first embodiment;
- FIG. 2
- a detailed view of the leveling device according to Figure 1; and
- FIG. 3
- a schematic representation of a mobile or non-mobile aerial work platform with a leveling device according to a second embodiment.
Figur 1 zeigt eine schematische Darstellung einer Nivelliervorrichtung 10 für einen Arbeitskorb 56 einer fahrbaren oder nicht-fahrbaren Hubarbeitsbühne. Der Arbeitskorb 56 ist an einem Korbträger 24 angebracht, wobei der Korbträger 24 über ein Drehgelenk 26 mit einem Korbarm 16 beweglich verbunden ist. Man erkennt, dass innerhalb des Korbarms 16 ein Nivellierzylinder 38 angeordnet ist und der Nivellierzylinder 38 mit einem Kettentrieb zum Bewegen einer ersten Umlenkrolle über ein Verbindungselement 40 verbunden ist. Der Kettentrieb 34 läuft zwischen der ersten Umlenkrolle 28 und einer ebenfalls innerhalb des Korbarms 16 angeordneten dritten Umlenkrolle 32 um. Am Umlauf ist eine zweite Umlenkrolle 30 angeordnet, die als Führungs- und Spannrolle dient.FIG. 1 shows a schematic representation of a
Man erkennt, dass die erste Umlenkrolle 28 mit dem Drehgelenk 26 in Wirkverbindung steht, derart, dass über die Steuerung des Nivellierzylinders 38 der Korbträger 24 bewegt wird und der Arbeitskorb 56 in ungefähr horizontaler und/oder senkrechter Ausrichtung gehalten wird. Der sich da bei dieser Konstruktion ergebende maximale Drehwinkel βmax beträgt ca. 270°.It can be seen that the first deflecting
Des Weiteren erkennt man, dass der Korbarm 16 teleskopierbar ausgebildet ist und aus einem äußeren ersten Korbarm 18, einem innenlaufenden zweiten Korbarm 20 und einem innerhalb des zweiten Korbarms 20 angeordneten dritten Korbarm 22, an dessen Ende das Drehgelenk 26 angeordnet ist, gebildet wird (vergleiche auch Figur 2).Furthermore, it can be seen that the
An dem Arbeitskorb 56 ist ein Neigungssensor 42 zum Erfassen der Neigung des Arbeitskorbes 56 gegenüber der Horizontalen und/oder der Vertikalen angeordnet. Der Neigungssensor 42 ist dabei über eine Signal- beziehungsweise Datenleitung (nicht dargestellt) mit einer Auswerte- und Steuereinheit (nicht dargestellt) verbunden. Dabei übermittelt die Auswerte- und Steuereinheit in Abhängigkeit von den Signalen beziehungsweise ermittelten Daten des Neigungssensors 42 Steuersignale an den Nivellierzylinder 38, derart, dass der Arbeitskorb 56 mittels dem Nivellierzylinder 38 und dem Kettentrieb 34 in ungefähr horizontaler und/oder senkrechter Ausrichtung gehalten wird.At the
Aus Figur 2, die eine Detailansicht der Nivelliervorrichtung 10 gemäß dem in Figur 1 dargestellten Ausführungsbeispiel darstellt, wird deutlich, dass der Kettentrieb 34 zwei Kettenspannvorrichtungen 36, 58 aufweist. Zudem erkennt man das Verbindungselement 40, welches den Nivellierzylinder 38 mit dem Kettentrieb 34 verbindet.From Figure 2, which shows a detailed view of the leveling
Der in Figur 1 dargestellte Aufbau einer fahrbaren oder nicht-fahrbaren Hubarbeitsbühne zeigt einen Drehturm 12, der über eine erste Gelenkverbindung 52 mit einem teleskopierbaren Ausleger 14, bestehend aus einem ersten Auslegerarm 48 und einem inneren zweiten Auslegerarm 50, beweglich verbunden ist. Der Ausleger 14 ist dabei über eine zweite Gelenkverbindung mit dem Korbarm 16, der ebenfalls teleskopierbar ausgebildet ist, beweglich verbunden.The construction of a mobile or non-mobile working platform illustrated in FIG. 1 shows a
Figur 3 zeigt eine schematische Darstellung einer Nivelliervorrichtung 10 gemäß einer zweiten Ausführungsform. Man erkennt, dass zwischen dem Drehturm 12 und dem Ausleger 14 der Hubarbeitsbühne ein erster Drehsensor 44 und zwischen dem Ausleger 14 und dem Korbarm 16 ein zweiter Drehsensor 46 zur Ermittelung der jeweiligen Winkel α1, α2 zwischen dem Drehturm 14 und dem Ausleger 14 sowie dem Ausleger 14 und dem Korbarm 16 angeordnet sind. Dabei ergibt die Addition der Winkel α1, α2 die Neigung des Arbeitskorbes 56 gegenüber der Horizontalen und/oder der Vertikalen. Die Drehsensoren 44, 46 sind über jeweils eine Signalbeziehungsweise Datenleitung mit einer Auswerte- und Steuereinheit (nicht dargestellt) verbunden. Dabei übermittelt die Auswerte- und Steuereinheit in Abhängigkeit von den Signalen beziehungsweise ermittelten Daten der Drehsensoren 44, 46 entsprechende Steuersignale an den Nivellierzylinder 38, derart, dass der Arbeitskorb 56 mittels dem Nivellierzylinder 38 und dem Kettentrieb 34 in ungefähr horizontaler und/oder senkrechter Ausrichtung gehalten wird. Der Kettentrieb 34 ist dabei wiederum über ein Verbindungselement 40 mit dem Nivellierzylinder 38 verbunden. Der Ausleger 14 sowie der Korbarm 16 sind wiederum teleskopierbar ausgebildet.FIG. 3 shows a schematic representation of a leveling
Claims (6)
- A method of levelling a working basket (56) of a lift working platform (10) with respect to a basket arm (16), to the one end of which the working basket (56) is movably fixed and/or with respect to a jib (14), the method including the following steps:(a) detecting the inclination of the working basket (56) with respect to the horizontal and/or the vertical by means of at least one inclination sensor (42) arranged on the working basket (56);
and/or(b) detecting the inclination of the working basket (56) with respect to the horizontal and/or the vertical by means of a first rotary sensor (44) arranged between a rotary tower (12) and the jib (14) and by means of a second rotary sensor (46) arranged between the jib (14) and the basket arm (16) for ascertaining the respective angles (α1, α2) between the rotary tower (12) and the jib (14) and the jib (14) and the basket arm (16), wherein the addition of the angles (α1, α2) represents the inclination of the working basket (56) with respect to the horizontal and/or the vertical;(c) communicating the signal or data ascertained by the inclination sensor (42) and/or the rotary sensors (44, 46) to at least one evaluation and control unit by means of one or more signal or data lines respectively;(d) controlling at least one levelling cylinder (38) by means of the evaluation and control unit in dependence on the signals or ascertained data respectively of the inclination sensor (20) and/or the rotary sensors (44, 46), wherein the levelling cylinder (38) is connected to at least one chain drive (34) for moving a first deflection roller (38) and the first deflection roller (38) is operatively connected to a rotary joint (26) in such a way that by way of the control of the levelling cylinder (38) a basket carrier (24) of the working basket (56) is moved and the working basket (56) is held in approximately horizontal and/or perpendicular orientation. - A method according to claim 1 characterised in that the first inclination sensor (42) and/or the rotary sensors (44, 46) and/or the evaluation and control unit outputs a signal for switching off the lift working platform (10) and/or a warning signal when a predefined inclination of the working basket (16) and/or the telescopic jib is exceeded.
- A mobile or non-mobile lift working platform including a levelling apparatus for carrying out the method according to claim 1 or claim 2 and a working basket (56), wherein the working basket (56) is mounted to a basket carrier (24) and the basket carrier (24) is connected movably to a basket arm (16) by way of a rotary joint (26) and at least one levelling cylinder (38) is arranged within the basket arm (16), wherein the levelling cylinder (38) is connected to at least one chain drive (34) for moving a first deflection roller (28) and the first deflection roller (28) is operatively connected to the rotary joint (26) in such a way that by way of the control of the levelling cylinder (38) the basket carrier (24) is moved and the working basket (56) is held in approximately horizontal and/or perpendicular orientation, characterised in that
arranged on the working basket (56) is at least one inclination sensor (42) for detecting the inclination of the working basket (56) with respect to the horizontal and/or the vertical and the inclination sensor (42) is connected by way of a signal or data line to an evaluation and control unit, wherein the data and evaluation unit communicates control signals to the levelling cylinder (38) in dependence on the signals or ascertained data respectively of the inclination sensor (42) in such a way that the working basket (56) is held in the approximately horizontal and/or perpendicular orientation by means of the levelling cylinder (38) and the chain drive (34),
and arranged between a rotary tower (12) and a jib (14) of the lift working platform is a first rotary sensor (44) and arranged between the jib (14) and the basket arm (16) is a second rotary sensor (46) for ascertaining the respective angles (α1, α2) between the rotary tower (12) and the jib (14) and the jib (14) and the basket arm (16), wherein the addition of the angles (α1, α2) represents the inclination of the working basket (56) with respect to the horizontal and/or the vertical, and the rotary sensors (44, 46) are connected by way of a respective signal or data line to an evaluation and control unit, wherein the evaluation and control unit communicates control signals to the levelling cylinder (38) in dependence on the signals or ascertained data of the rotary sensors (44, 46) in such a way that the working basket (56) is held in the approximately horizontal and/or perpendicular orientation by means of the levelling cylinder (38) and the chain drive (34). - A mobile or non-mobile lift working platform according to claim 3 characterised in that the inclination sensor (42) and/or the rotary sensors (44, 46) and/or the evaluation and control unit outputs a signal for switching off the lift working platform (10) and/or a warning signal when a predefined inclination of the working basket (56) and/or the basket arm (16) is exceeded.
- A mobile or non-mobile lift working platform according to claim 3 or claim 4 characterised in that the jib (14) and/or the basket arm (16) are telescopic.
- A mobile or non-mobile lift working platform according to one of claims 3 to 5 characterised in that the chain drive (34) has at least one chain tensioning device (36, 58).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT03008176T ATE318787T1 (en) | 2003-04-08 | 2003-04-08 | LEVELING DEVICE AND METHOD FOR LEVELING A WORKING PLATFORM OF AN ELEVATOR WORK PLATFORM |
| EP03008176A EP1466862B1 (en) | 2003-04-08 | 2003-04-08 | Levelling device and levelling method for a workbasket of an elevating work platform |
| DE50302492T DE50302492D1 (en) | 2003-04-08 | 2003-04-08 | Leveling device and method for leveling a working platform of an aerial work platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP03008176A EP1466862B1 (en) | 2003-04-08 | 2003-04-08 | Levelling device and levelling method for a workbasket of an elevating work platform |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1466862A1 EP1466862A1 (en) | 2004-10-13 |
| EP1466862B1 true EP1466862B1 (en) | 2006-03-01 |
Family
ID=32864969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03008176A Expired - Lifetime EP1466862B1 (en) | 2003-04-08 | 2003-04-08 | Levelling device and levelling method for a workbasket of an elevating work platform |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1466862B1 (en) |
| AT (1) | ATE318787T1 (en) |
| DE (1) | DE50302492D1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0500619D0 (en) * | 2005-01-13 | 2005-02-23 | Severfield Rowen Plc | Improvements relating to construction |
| EP2366655A1 (en) * | 2010-03-15 | 2011-09-21 | René Altena | Aerial work platform |
| CN102976241B (en) * | 2012-12-05 | 2015-06-17 | 徐州重型机械有限公司 | Weighing device with novel structure for load of platform |
| EP3199486B1 (en) * | 2016-01-28 | 2018-06-20 | MOBA - Mobile Automation AG | Crane mechanism and work platform with a load measuring device and an integrated inclination sensor |
| CN106395697B (en) * | 2016-08-24 | 2019-10-01 | 浙江鼎力机械股份有限公司 | Expansion joint assembly and aerial work platform |
| CN108824223A (en) * | 2018-07-17 | 2018-11-16 | 芜湖芬特勘测服务有限公司 | A kind of safe hanger of bridge maintaining |
Family Cites Families (4)
| 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 |
| US4476955A (en) * | 1981-06-22 | 1984-10-16 | Carter Jerry A | Articulated powered lift machines |
| EP1313664B1 (en) * | 2000-08-30 | 2008-10-08 | PAT GmbH | Redundant safety system of a vehicle |
| DE10103078C2 (en) * | 2001-01-24 | 2003-03-13 | Ruthmann Anton Gmbh & Co | Device for pulling telescopic beams in and out |
-
2003
- 2003-04-08 EP EP03008176A patent/EP1466862B1/en not_active Expired - Lifetime
- 2003-04-08 AT AT03008176T patent/ATE318787T1/en not_active IP Right Cessation
- 2003-04-08 DE DE50302492T patent/DE50302492D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP1466862A1 (en) | 2004-10-13 |
| DE50302492D1 (en) | 2006-04-27 |
| ATE318787T1 (en) | 2006-03-15 |
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