EP1382562B2 - Load measuring device - Google Patents

Load measuring device Download PDF

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Publication number
EP1382562B2
EP1382562B2 EP03016173A EP03016173A EP1382562B2 EP 1382562 B2 EP1382562 B2 EP 1382562B2 EP 03016173 A EP03016173 A EP 03016173A EP 03016173 A EP03016173 A EP 03016173A EP 1382562 B2 EP1382562 B2 EP 1382562B2
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EP
European Patent Office
Prior art keywords
crane mechanism
working platform
crane
cantilever
load cell
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Expired - Lifetime
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EP03016173A
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German (de)
French (fr)
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EP1382562A1 (en
EP1382562B1 (en
Inventor
Paul Bernd
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MOBA Mobile Automation AG
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MOBA Mobile Automation AG
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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
    • B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
    • B66F17/006—Safety devices, e.g. for limiting or indicating lifting force for working platforms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • B66F11/044—Working platforms suspended from booms
    • B66F11/046—Working platforms suspended from booms of the telescoping type

Definitions

  • the present invention relates to a load detecting device for a working platform to securely and accurately detect a load acting on the work platform. More particularly, the present invention relates to a load sensing device for aerial work platforms, e.g. B. hydraulic aerial work platforms, which are attached via a crane to a truck.
  • aerial work platforms e.g. B. hydraulic aerial work platforms
  • a problem with the safe and accurate determination of the load acting on the platform / platform is that it is safe and accurate to detect even when the load is not acting at the center of gravity of the platform, but eccentric to the same, as is usually the case becomes when the operator moves on the platform or when materials are parked in the edge areas of the platform.
  • the GB 2 062 258 A describes a crane to which a work basket is attached via a boom.
  • the boom is attached via a hinge to the crane section.
  • the basket is fastened to the boom via fasteners, such that the work basket rests on a pressure plate so that a load of the work basket can be displayed via the display.
  • the present invention seeks to provide an improved crane mechanism with working platform and load sensing device, which is feasible without complex mechanical and design effort and at the same time ensures the required accuracy in the detection of the load.
  • This object is achieved by a crane mechanism according to claim 1.
  • the present invention provides a load detection device for a work platform, the load detection device comprising a crane mechanism for moving the work platform.
  • the crane mechanism is attachable to a base.
  • a load cell is disposed between the crane mechanism and the work platform, and the crane mechanism and the work platform are interconnected via the load cell, which is the only connection between the crane mechanism and the work platform.
  • the load cell comprises a first strain gauges full bridge and a second strain gauges full bridge, which ensures further weighing in case of failure of the first bridge, wherein the load cell is further preferably designed to eliminate side moments and / or torsional moments.
  • the advantage of the present invention is that here a novel approach is followed, which consists in connecting the crane and the work cage exclusively via the load cell, wherein the load cell is designed for an eccentric load introduction, which is mechanically constructed as a parallelogram.
  • the load cell has the ability to accurately determine the weight of loads even when the center of gravity of the load is outside the load cell.
  • the device according to the invention comprises a crane 100, for example a hydraulically actuated crane of conventional design.
  • This crane 100 comprises a plurality of stages, in which Fig. 1 shown example three stages 100 1 , 100 2 and 100 3 are provided.
  • One end of the third stage 100 3 of the crane 100 is provided with a boom 102, which has a in Fig. 1 not shown in detail hinge 104 is connected to the end of the third stage 100 3 , to ensure that a fixed to the boom 102 work basket 108 can always be kept in the horizontal.
  • the end of the cantilever 102 facing away from the hinge 104 comprises an end plate 106, to which the working basket 108 is fastened in the manner described in more detail below.
  • a load cell 110 is arranged between the work basket 108 and the end plate 106.
  • a first U-shaped angle profile 112 is provided, which can be fastened on one side of the weighing cell 110 by means of screws 114.
  • a second U-shaped angle element 116 can be fastened on an opposite side of the weighing cell 110 by means of screws.
  • the angle plate 112 is connectable to the end plate 106, and the angle plate 116 is connectable to a side surface of the work basket 108, so that via the load cell, a connection between the work basket 108 and the crane 100 can be produced.
  • Fig. 2A For example, the load cell 110 to which the angle plates 112 and 116 are attached is shown.
  • the angle plates each include a first portion 120 and a second portion 122.
  • the angle plate 112 or 116 is bolted to the load cell 110 as described above using the openings 124.
  • the load cell 110 exemplified includes four U-shaped recesses 126 to 132, which extend through the load cell. Between the recesses 130 and 132 is an in Fig. 2B not to be recognized recess / depression formed in which a strain gauge is arranged. Between the recesses 126 and 128, a further recess 134 is formed in the alternatively or additionally a strain gauge is added.
  • connection cable electrical lines are led to lead out the detection signals to an evaluation device.
  • the measuring resistors in the load cell are connected in a bridge.
  • the load cell is designed mechanically as a parallelogram, which does not deform like a "bending rod" when loaded, but rather in a Fig. 2B schematically deformed (S-deformation) is subjected, thereby resulting in the possibility to determine a weight well, even if the center of gravity of the load is outside the load cell.
  • the load cell eliminates lateral moments and / or torsional moments.
  • Fig. 3A is the in Fig. 1 shown assembly shown in the assembled state.
  • the end plate 106 of the crane 100 is secured to the angle plate 112
  • the basket 108 is secured to the angle plate 116 with attachment to the sections 122 (see FIG Fig. 2A ) of the angle plates.
  • the angle plates are fastened to the load cell via the screws 114.
  • the load cell is arranged in a direction transverse to a longitudinal axis 102 'of the crane jib 102.
  • Fig. 3B shows the junction between the work basket 108 and crane 100 in an enlarged view.
  • mounting the load cell is installed longitudinally, but can be installed transversely even with space problems, in which case only L-shaped angle plates are used instead of the U-shaped angle plates shown in the figures, the work basket or the end plate 106 then at the sections of L-shaped angle plates are attached, which do not accommodate the screws.
  • Fig. 3C is the in Fig. 1 shown arrangement in the assembled state, wherein here, unlike in Fig. 3A in that the load cell is arranged in a direction along the longitudinal axis of the crane jib 102. Furthermore, in Fig. 3C to recognize the attached to the basket 108 end plate 106 '. Between the two end plates 106 and 106 ', the load cell 110 is arranged.
  • Fig. 4 shows a further embodiment of the present invention, which essentially according to the Fig. 1 and the Fig. 3 corresponds to described embodiment.
  • the same elements are provided here with the same reference numerals.
  • the load cell 110 is installed here under the work basket 108, that is connected to a lower surface 108 '.
  • the load cell 110 may be adapted to the in Fig. 4 shown type along (parallel) to the longitudinal axis 102 'of the crane boom 102 may be arranged.
  • the load cell can also be arranged transversely to the longitudinal axis of the crane jib.
  • the load cell makes the only connection between the work basket and crane, so that here in a structurally simple way a connection can be made, at the same time a secure and accurate detection the load acting on the platform 108 is granted due to the load cell used.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Jib Cranes (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Measurement Of Force In General (AREA)
  • Air Bags (AREA)
  • Push-Button Switches (AREA)

Abstract

The load grabbing device has a crane mechanism (100) for the moving of the working platform (108) and which is fastened on a base, and a load cell (110) is installed between the crane mechanism and working platform, whereby the crane mechanism and working platform are interconnected by the load cell, with the load cell being the single connection between the crane mechanism and working platform. The load cell is installed between a side face or a lower face of the working platform and a jib (102) of the crane mechanism. An Independent claim is included for a vehicle with a load-grabbing device, whereby the crane mechanism is fastened on the chassis of the vehicle.

Description

Die vorliegende Erfindung bezieht sich auf eine Lasterfassungseinrichtung für eine Arbeitsbühne, um eine auf die Arbeitsbühne wirkende Last sicher und genau zu erfassen. Insbesondere bezieht sich die vorliegende Erfindung auf eine Lasterfassungsvorrichtung für Hubarbeitsbühnen, z. B. hydraulische Hubarbeitsbühnen, die über einen Kran an einem LKW befestigt sind.The present invention relates to a load detecting device for a working platform to securely and accurately detect a load acting on the work platform. More particularly, the present invention relates to a load sensing device for aerial work platforms, e.g. B. hydraulic aerial work platforms, which are attached via a crane to a truck.

Arbeitsbühnen, insbesondere solche, die an LKWs befestigt sind, sind bekannt. Bei solchen Hubarbeitsbühnen ist im Betrieb sicherzustellen, dass eine bestimmte Last nicht überschritten wird. Diese Last kann z. B. durch einen Benutzer der Arbeitsbühne sowie durch Material, welches zusammen mit dem Benutzer bewegt werden muss, hervorgerufen werden. Die Arbeitsbühne ist im Regelfall über einen Auslegerkran bewegbar mit einem Chassis des LKW verbunden und kann, beispielsweise unter Steuerung der Bedienperson in der Arbeitsbühne, frei bewegt werden. Abhängig von einer Position der Arbeitsbühne bzw. des Arbeitskorbes bezüglich eines Schwerpunkts des LKWs unter Einbeziehung des Kranmechanismus dürfen bestimmte Lasten nicht überschritten werden, um ein Kippen des LKWs oder eine Überbelastung des Kranmechanismus zu vermeiden. Aus diesen Gründen ist es erforderlich, die auf die Arbeitsbühne wirkende Last zu jedem Zeitpunkt des Betriebs sicher und genau zu bestimmen.Work platforms, especially those that are attached to trucks are known. In the case of such aerial work platforms, it must be ensured during operation that a certain load is not exceeded. This load can be z. B. caused by a user of the platform and by material that must be moved together with the user. The platform is usually connected via a jib crane movably connected to a chassis of the truck and can, for example, under the control of the operator in the platform, are moved freely. Depending on a position of the work platform or the work basket with respect to a center of gravity of the truck involving the crane mechanism certain loads must not be exceeded in order to avoid tilting of the truck or overloading of the crane mechanism. For these reasons, it is necessary to safely and accurately determine the load acting on the work platform at each time of operation.

Ein Problem bei der sicheren und genauen Bestimmung der auf die Arbeitsbühne/Arbeitskorb wirkenden Last besteht darin, dass diese auch dann sicher und genau zu erfassen ist, wenn die Last nicht im Schwerpunkt der Arbeitsbühne wirkt, sondern exzentrisch zu demselben, wie dies im Regelfall auftreten wird, wenn sich die Bedienperson auf der Arbeitsbühne bewegt bzw. wenn Materialien in Randbereichen der Arbeitsbühne abgestellt werden.A problem with the safe and accurate determination of the load acting on the platform / platform is that it is safe and accurate to detect even when the load is not acting at the center of gravity of the platform, but eccentric to the same, as is usually the case becomes when the operator moves on the platform or when materials are parked in the edge areas of the platform.

Im Stand der Technik sind verschiedene Lösungen zu dieser Problematik bekannt. Zum einen wird vorgeschlagen, eine Wägezelle heranzuziehen, die mit einem mechanischen Parallelogramm verbunden ist, welches wiederum mit der Bühne verbunden ist. Ein anderer Ansatz besteht darin, die Arbeitsbühne auf einem speziellen Rahmen zu befestigen, wobei an den vier Ecken der Arbeitsbühne jeweils eine Wägezelle vorgesehen ist. Diese Ansätze ermöglichen zwar eine Erfassung der Last, sind jedoch mechanisch und bezüglich der Auswertung sehr aufwendig.Various solutions to this problem are known in the prior art. On the one hand, it is proposed to use a load cell which is connected to a mechanical parallelogram, which in turn is connected to the stage. Another approach is to mount the platform on a special frame, with a load cell at each of the four corners of the platform. Although these approaches allow a detection of the load, but are very expensive and mechanically in terms of the evaluation.

Die GB 2 062 258 A beschreibt einen Kran an dem über einen Ausleger ein Arbeitskorb befestigt ist. Der Ausleger ist über ein Gelenk an dem Kranabschnitt befestigt. Der Korb ist über Befestigungselemente an dem Ausleger befestigt, und zwar derart, dass der Arbeitskorb auf einer Druckplatte ruht, so dass über die Anzeige eine Belastung des Arbeitskorbes angezeigt werden kann.The GB 2 062 258 A describes a crane to which a work basket is attached via a boom. The boom is attached via a hinge to the crane section. The basket is fastened to the boom via fasteners, such that the work basket rests on a pressure plate so that a load of the work basket can be displayed via the display.

Ausgehend von diesem Stand der Technik liegt der vorliegenden Erfindung die Aufgabe zugrunde, einen verbesserten Kranmechanismus mit Arbeitsbühne und Lasterfassungsvorrichtung zu schaffen, welcher ohne aufwendigen mechanischen und konstruktiven Aufwand realisierbar ist und gleichzeitig die erforderliche Genauigkeit bei der Erfassung der Last sicherstellt.
Diese Aufgabe wird durch einen Kranmechanismus gemäss Anspruch 1 gelöst.Based on this prior art, the present invention seeks to provide an improved crane mechanism with working platform and load sensing device, which is feasible without complex mechanical and design effort and at the same time ensures the required accuracy in the detection of the load.
This object is achieved by a crane mechanism according to claim 1.

Die vorliegende Erfindung schafft eine Lasterfassungsvorrichtung für eine Arbeitsbühne, wobei die Lasterfassungsvorrichtung einen Kranmechanismus zum Bewegen der Arbeitsbühne umfasst. Der Kranmechanismus ist an einer Basis befestigbar. Eine Wägezelle ist zwischen dem Kranmechanismus und der Arbeitsbühne angeordnet, und der Kranmechanismus und die Arbeitsbühne sind über die Wägezelle miteinander verbunden, wobei dies die einzige Verbindung zwischen dem Kranmechanismus und der Arbeitsbühne darstellt.The present invention provides a load detection device for a work platform, the load detection device comprising a crane mechanism for moving the work platform. The crane mechanism is attachable to a base. A load cell is disposed between the crane mechanism and the work platform, and the crane mechanism and the work platform are interconnected via the load cell, which is the only connection between the crane mechanism and the work platform.

Die Wägezelle umfasst eine erste Dehnungsmessstreifenvollbrücke und eine zweite Dehnungsmessstreifenvollbrücke, die bei Ausfall der ersten Brücke eine weitere Wiegung sicherstellt, wobei die Wägezelle ferner vorzugsweise ausgebildet ist, um Seitenmomente und/oder Torsionsmomente zu eliminieren.The load cell comprises a first strain gauges full bridge and a second strain gauges full bridge, which ensures further weighing in case of failure of the first bridge, wherein the load cell is further preferably designed to eliminate side moments and / or torsional moments.

Der Vorteil der vorliegenden Erfindung besteht darin, dass hier ein neuartiger Ansatz verfolgt wird, der darin besteht, den Kran und den Arbeitskorb ausschließlich über die Wägezelle zu verbinden, wobei die Wägezelle für eine exzentrische Lasteinleitung ausgelegt ist, welche mechanisch als Parallelogramm konstruiert ist. Hierdurch besitzt die Wägezelle die Fähigkeit, exakt das Gewicht von Lasten zu bestimmen, auch wenn der Schwerpunkt der Last außerhalb der Wägezelle liegt.The advantage of the present invention is that here a novel approach is followed, which consists in connecting the crane and the work cage exclusively via the load cell, wherein the load cell is designed for an eccentric load introduction, which is mechanically constructed as a parallelogram. As a result, the load cell has the ability to accurately determine the weight of loads even when the center of gravity of the load is outside the load cell.

Bevorzugte Weiterbildungen der vorliegenden Anmeldung sind in den Unteransprüchen definiert.Preferred developments of the present application are defined in the subclaims.

Anhand der beiliegenden Zeichnungen werden nachfolgend bevorzugte Ausführungsbeispiele der vorliegenden Erfindung näher erläutert. Es zeigen:

Fig. 1
ein erstes Ausführungsbeispiel der erfindungsgemäßen Anordnung im nicht-zusammengebauten Zustand.
Fig. 2A
eine vergrößerte Darstellung der Wägezelle aus Fig. 1,
Fig. 2B
schematisch die Verformung der in Fig. 2A dargestellten Wägezelle bei Beaufschlagung derselben mit einer Last,
Fig. 3A
die in Fig. 1 gezeigte Anordnung im zusammengebauten Zustand mit quer eingebauter Wägezelle,
Fig. 3B
eine vergrößerte Darstellung des Verbindungsabschnitts zwischen Kran und Arbeitsbühne,
Fig. 3C
die in Fig. 1 gezeigte Anordnung im zusammengebauten Zustand mit längs eingebauter Wägezelle, und
Fig. 4
ein weiteres Ausführungsbeispiel der vorliegenden Erfindung mit unter dem Arbeitskorb eingebauter Wägezelle.
Reference to the accompanying drawings, preferred embodiments of the present invention will be explained in more detail below. Show it:
Fig. 1
a first embodiment of the inventive arrangement in the unassembled state.
Fig. 2A
an enlarged view of the load cell Fig. 1 .
Fig. 2B
schematically the deformation of in Fig. 2A illustrated load cell when applied to the same load,
Fig. 3A
in the Fig. 1 assembly shown in the assembled state with transversely mounted load cell,
Fig. 3B
an enlarged view of the connecting portion between crane and work platform,
Fig. 3C
in the Fig. 1 assembly shown in the assembled state with longitudinally mounted load cell, and
Fig. 4
a further embodiment of the present invention with built under the work basket load cell.

In Fig. 1 ist ein erstes Ausführungsbeispiel der erfindungsgemäßen Vorrichtung näher dargestellt. Die erfindungsgemäße Vorrichtung umfasst einen Kran 100, beispielsweise einen hydraulisch betätigbaren Kran herkömmlicher Bauart. Dieser Kran 100 umfasst eine Mehrzahl von Stufen, bei dem in Fig. 1 gezeigten Beispiel sind drei Stufen 1001, 1002 und 1003 vorgesehen. Ein Ende der dritten Stufe 1003 des Krans 100 ist mit einem Ausleger 102 versehen, der über ein in Fig. 1 nicht näher dargestelltes Gelenk 104 mit dem Ende der dritten Stufe 1003 verbunden ist, um sicherzustellen, dass ein am Ausleger 102 befestigter Arbeitskorb 108 stets in der Horizontalen gehalten werden kann. Das dem Gelenk 104 abgewandte Ende des Auslegers 102 umfasst eine Abschlussplatte 106, an der auf die noch nachfolgend näher beschriebene Art und Weise der Arbeitskorb 108 befestigt ist. Zwischen dem Arbeitskorb 108 und der Abschlussplatte 106 ist eine Wägezelle 110 angeordnet. Ein erstes U-förmiges Winkelprofil 112 ist vorgesehen, welches an einer Seite der Wägezelle 110 mittels Schrauben 114 befestigbar ist. Ein zweites U-förmiges Winkelelement 116 ist an einer gegenüberliegenden Seite der Wägezelle 110 mittels Schrauben befestigbar. Das Winkelblech 112 ist mit der Abschlussplatte 106 verbindbar, und das Winkelblech 116 ist mit einer Seitenfläche des Arbeitskorbs 108 verbindbar, so dass über die Wägezelle eine Verbindung zwischen dem Arbeitskorb 108 und dem Kran 100 herstellbar ist.In Fig. 1 a first embodiment of the device according to the invention is shown in more detail. The device according to the invention comprises a crane 100, for example a hydraulically actuated crane of conventional design. This crane 100 comprises a plurality of stages, in which Fig. 1 shown example three stages 100 1 , 100 2 and 100 3 are provided. One end of the third stage 100 3 of the crane 100 is provided with a boom 102, which has a in Fig. 1 not shown in detail hinge 104 is connected to the end of the third stage 100 3 , to ensure that a fixed to the boom 102 work basket 108 can always be kept in the horizontal. The end of the cantilever 102 facing away from the hinge 104 comprises an end plate 106, to which the working basket 108 is fastened in the manner described in more detail below. Between the work basket 108 and the end plate 106, a load cell 110 is arranged. A first U-shaped angle profile 112 is provided, which can be fastened on one side of the weighing cell 110 by means of screws 114. A second U-shaped angle element 116 can be fastened on an opposite side of the weighing cell 110 by means of screws. The angle plate 112 is connectable to the end plate 106, and the angle plate 116 is connectable to a side surface of the work basket 108, so that via the load cell, a connection between the work basket 108 and the crane 100 can be produced.

In Fig. 2A ist beispielhaft die Wägezelle 110 gezeigt, an der die Winkelbleche 112 und 116 befestigt sind. Die Winkelbleche umfassen jeweils einen ersten Abschnitt 120 und einen zweiten Abschnitt 122. Das Winkelblech 112 bzw. 116 wird mit der Wägezelle 110, wie oben beschrieben, verschraubt, unter Verwendung der Öffnungen 124. Die beispielhaft dargestellte Wägezelle 110 umfasst vier U-förmige Ausnehmungen 126 bis 132, die sich durch die Wägezelle erstrecken. Zwischen den Ausnehmungen 130 und 132 ist eine in Fig. 2B nicht zu erkennende Ausnehmung/Vertiefung gebildet, in der ein Dehnungsmessstreifen angeordnet ist. Zwischen den Ausnehmungen 126 und 128 ist eine weitere Ausnehmung 134 gebildet, in der alternativ oder zusätzlich ein Dehnungsmessstreifen aufgenommen ist.In Fig. 2A For example, the load cell 110 to which the angle plates 112 and 116 are attached is shown. The angle plates each include a first portion 120 and a second portion 122. The angle plate 112 or 116 is bolted to the load cell 110 as described above using the openings 124. The load cell 110 exemplified includes four U-shaped recesses 126 to 132, which extend through the load cell. Between the recesses 130 and 132 is an in Fig. 2B not to be recognized recess / depression formed in which a strain gauge is arranged. Between the recesses 126 and 128, a further recess 134 is formed in the alternatively or additionally a strain gauge is added.

Über ein nicht näher gezeigtes Anschlusskabel werden elektrische Leitungen zum Herausführen der Erfassungssignale an eine Auswertungseinrichtung geleitet. Die Messwiderstände in der Wägezelle sind in einer Brücke verschaltet. Die Wägezelle ist mechanisch als Parallelogramm konstruiert, welches sich bei einer Belastung nicht wie ein "Biegestab" verformt, sondern einer in Fig. 2B schematisch gezeigten Verformung (S-Verformung) unterworfen ist, wodurch sich die Möglichkeit ergibt, ein Gewicht auch dann genau zu bestimmen, wenn sich der Schwerpunkt der Last außerhalb der Wägezelle befindet. Die Wägezelle eliminiert Seitenmomente und/oder Torsionsmomente.About a not shown in detail connection cable electrical lines are led to lead out the detection signals to an evaluation device. The measuring resistors in the load cell are connected in a bridge. The load cell is designed mechanically as a parallelogram, which does not deform like a "bending rod" when loaded, but rather in a Fig. 2B schematically deformed (S-deformation) is subjected, thereby resulting in the possibility to determine a weight well, even if the center of gravity of the load is outside the load cell. The load cell eliminates lateral moments and / or torsional moments.

In Fig. 3A ist die in Fig. 1 gezeigte Anordnung in dem zusammengebauten Zustand dargestellt. Wie zu erkennen ist, wird die Abschlussplatte 106 des Krans 100 an dem Winkelblech 112 befestigt, und der Korb 108 wird an dem Winkelblech 116 befestigt, wobei die Befestigung an den Abschnitten 122 (siehe Fig. 2A) der Winkelbleche erfolgt. Die Winkelbleche sind über die Schrauben 114 an der Wägezelle befestigt. Die Wägezelle ist in einer Richtung quer zu einer Längsachse 102' des Kranauslegers 102 angeordnet.In Fig. 3A is the in Fig. 1 shown assembly shown in the assembled state. As can be seen, the end plate 106 of the crane 100 is secured to the angle plate 112, and the basket 108 is secured to the angle plate 116 with attachment to the sections 122 (see FIG Fig. 2A ) of the angle plates. The angle plates are fastened to the load cell via the screws 114. The load cell is arranged in a direction transverse to a longitudinal axis 102 'of the crane jib 102.

Fig. 3B zeigt die Verbindungsstelle zwischen Arbeitskorb 108 und Kran 100 in vergrößerter Darstellung. Bei der in Fig. 3 dargestellten Befestigungsart ist die Wägezelle längs eingebaut, kann jedoch auch bei Platzproblemen quer eingebaut werden, wobei dann anstelle der in den Figuren gezeigten U-förmigen Winkelbleche lediglich L-förmige Winkelbleche verwendet werden, wobei der Arbeitskorb bzw. die Abschlussplatte 106 dann an den Abschnitten der L-förmigen Winkelbleche befestigt werden, welche nicht die Schrauben aufnehmen. Fig. 3B shows the junction between the work basket 108 and crane 100 in an enlarged view. At the in Fig. 3 shown mounting the load cell is installed longitudinally, but can be installed transversely even with space problems, in which case only L-shaped angle plates are used instead of the U-shaped angle plates shown in the figures, the work basket or the end plate 106 then at the sections of L-shaped angle plates are attached, which do not accommodate the screws.

In Fig. 3C ist die in Fig. 1 gezeigte Anordnung in dem zusammengebauten Zustand dargestellt, wobei hier, anders als in Fig. 3A, die Wägezelle in einer Richtung längs zu der Längsachse des Kranauslegers 102 angeordnet ist. Ferner ist in Fig. 3C die an dem Korb 108 befestigte Abschlussplatte 106' zu erkennen. Zwischen den zwei Abschlussplatten 106 und 106' ist die Wägezelle 110 angeordnet.In Fig. 3C is the in Fig. 1 shown arrangement in the assembled state, wherein here, unlike in Fig. 3A in that the load cell is arranged in a direction along the longitudinal axis of the crane jib 102. Furthermore, in Fig. 3C to recognize the attached to the basket 108 end plate 106 '. Between the two end plates 106 and 106 ', the load cell 110 is arranged.

Fig. 4 zeigt ein weiteres Ausführungsbeispiel der vorliegenden Erfindung, das im wesentlichen dem anhand der Fig. 1 und der Fig. 3 beschriebenen Ausführungsbeispiel entspricht. Gleiche Elemente sind hier mit gleichen Bezugszeichen versehen. Anders als in Fig. 1 und in Fig. 3 ist die Wägezelle 110 hier unter dem Arbeitskorb 108 eingebaut, also mit einer unteren Oberfläche 108' verbunden. Die Wägezelle 110 kann auf die in Fig. 4 gezeigte Art längs (parallel) zu der Längsachse 102' des Kranauslegers 102 angeordnet sein. Alternativ kann die Wägezelle auch quer zu der Längsachse des Kranauslegers angeordnet sein. Fig. 4 shows a further embodiment of the present invention, which essentially according to the Fig. 1 and the Fig. 3 corresponds to described embodiment. The same elements are provided here with the same reference numerals. Unlike in Fig. 1 and in Fig. 3 the load cell 110 is installed here under the work basket 108, that is connected to a lower surface 108 '. The load cell 110 may be adapted to the in Fig. 4 shown type along (parallel) to the longitudinal axis 102 'of the crane boom 102 may be arranged. Alternatively, the load cell can also be arranged transversely to the longitudinal axis of the crane jib.

Anders als bei den bekannten Lösungen, wie sie im Stand der Technik beschrieben sind, stellt die Wägezelle die einzige Verbindung zwischen Arbeitskorb und Kran her, so dass hier auf konstruktiv einfache Art und Weise eine Verbindung hergestellt werden kann, wobei gleichzeitig eine sichere und genaue Erfassung der auf die Arbeitsbühne 108 wirkende Last gewährt ist, aufgrund der verwendeten Wägezelle.Unlike the known solutions, as described in the prior art, the load cell makes the only connection between the work basket and crane, so that here in a structurally simple way a connection can be made, at the same time a secure and accurate detection the load acting on the platform 108 is granted due to the load cell used.

Claims (8)

  1. A crane mechanism and working platform with a load detection apparatus, comprising:
    a crane mechanism (100, 102, 104) for moving the working platform (108), wherein the crane mechanism (100) is mountable to a base and comprises a cantilever (102), which is connected to a stage of the crane mechanism (100) via a joint (104); and
    a weighing cell (110) disposed between the cantilever (102) and the working platform (108) and mounted to the cantilever (102)with a first end;
    characterized in that
    the working platform (108) is mounted to the cantilever (102) via the weighing cell (110),
    the weighing cell (110) is mounted to the working platform (108) with a second end, and
    the weighing cell (110) is the only connection between the cantilever (102) and the working platform (108); wherein
    the weighing cell (110) comprises a first strain gauge strip full bridge and a second strain gauge strip full bridge ensuring a further weighing during failure of the first bridge.
  2. The crane mechanism and working platform of claim 1, wherein the weighing cell (110) is disposed between a lateral face of the working platform (108) and the cantilever (102).
  3. The crane mechanism and working platform of claim 1, wherein the weighing cell (110) is disposed between a bottom surface (108') of the working platform (108) and the cantilever (102).
  4. The crane mechanism and working platform of claim 2 or 3, wherein the weighing cell (110) is disposed in parallel to a longitudinal axis (102') of the cantilever (102).
  5. The crane mechanism and operating stage of claim 2 or 3, wherein the weighing cell (110) is disposed transversally to a longitudinal axis (102') of the cantilever (102).
  6. The crane mechanism and working stage of one of claims 1 to 5, wherein the weighing cell (110) is formed such that side moments and/or torsion moments are compensated.
  7. The crane mechanism and working stage of one of claims 1 to 6, wherein the working stage is a working basket.
  8. A vehicle with a crane mechanism and a working stage of one of claims 1 to 7, wherein the crane mechanism (100) is mounted to a vehicle chassis.
EP03016173A 2002-07-19 2003-07-16 Load measuring device Expired - Lifetime EP1382562B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20210958U DE20210958U1 (en) 2002-07-19 2002-07-19 Load detecting device
DE20210958U 2002-07-19

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EP1382562A1 EP1382562A1 (en) 2004-01-21
EP1382562B1 EP1382562B1 (en) 2005-05-11
EP1382562B2 true EP1382562B2 (en) 2010-08-04

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AT (1) ATE295332T1 (en)
DE (2) DE20210958U1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005022607A1 (en) * 2005-05-11 2006-11-23 EBM Brosa Messgeräte GmbH & Co. KG Device for fastening of load supporting device on jib of lifting equipment has connecting component is fastened between the first and second component with supporting action and with clearance in longitudinal direction
CN101780934A (en) * 2010-02-26 2010-07-21 南京晨光水山电液特装有限公司 High-altitude operation slot load measuring device
FR3000200B1 (en) 2012-12-24 2016-04-15 Haulotte Group WEIGHING MECHANISM FOR A NACELLE AND LIFT BOOM COMPRISING SUCH A WEIGHTING MECHANISM
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
EP3205992B1 (en) 2016-02-11 2019-06-19 MOBA - Mobile Automation AG Electrical circuit, weighing cell, load detection device and vehicle with a load detection device
FR3087762A1 (en) * 2018-10-26 2020-05-01 Haulotte Group WEIGHING SYSTEM FOR WORK PLATFORM OF A MAT LIFT PLATFORM
WO2020084561A1 (en) 2018-10-26 2020-04-30 Haulotte Group Weighing system for a working platform of an aerial lift having a mast

Citations (1)

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Publication number Priority date Publication date Assignee Title
DE3608628A1 (en) † 1986-03-14 1987-09-17 Pietzsch Ludwig Gmbh & Co DEVICE FOR MONITORING THE OPERATING FORCES ON A WORK BASKET

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Publication number Priority date Publication date Assignee Title
GB2062258B (en) * 1979-11-01 1983-11-16 Simon Eng Dudley Ltd Safe load indicator
AU558720B2 (en) * 1982-09-29 1987-02-05 James Industries Ltd. Hoist with weighing device
FR2717899B1 (en) * 1994-03-24 1996-08-02 Claude Allemane Overload control device for nacelles or lifting platforms.
JP2875482B2 (en) * 1994-09-30 1999-03-31 新明和工業株式会社 Aerial work vehicle
JP3078477B2 (en) * 1995-07-28 2000-08-21 株式会社アイチコーポレーション Workbench angle adjustment device
JPH10194698A (en) * 1997-01-07 1998-07-28 Nagano Kogyo Kk Load detector for traveling type construction machine

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
DE3608628A1 (en) † 1986-03-14 1987-09-17 Pietzsch Ludwig Gmbh & Co DEVICE FOR MONITORING THE OPERATING FORCES ON A WORK BASKET

Also Published As

Publication number Publication date
EP1382562A1 (en) 2004-01-21
DE20210958U1 (en) 2003-01-09
ATE295332T1 (en) 2005-05-15
DE50300529D1 (en) 2005-06-16
EP1382562B1 (en) 2005-05-11

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