EP1146006B1 - Warning panel for cranes with foldable jib - Google Patents

Warning panel for cranes with foldable jib Download PDF

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Publication number
EP1146006B1
EP1146006B1 EP01850057A EP01850057A EP1146006B1 EP 1146006 B1 EP1146006 B1 EP 1146006B1 EP 01850057 A EP01850057 A EP 01850057A EP 01850057 A EP01850057 A EP 01850057A EP 1146006 B1 EP1146006 B1 EP 1146006B1
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EP
European Patent Office
Prior art keywords
lamps
cylinder
pressure
display panel
lamp
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP01850057A
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German (de)
French (fr)
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EP1146006A2 (en
EP1146006A3 (en
Inventor
Per Gustafsson
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Hiab AB
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Hiab AB
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Publication of EP1146006A3 publication Critical patent/EP1146006A3/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/88Safety gear
    • B66C23/90Devices for indicating or limiting lifting moment
    • B66C23/905Devices for indicating or limiting lifting moment electrical

Definitions

  • This invention relates to a warning sign for bending arm cranes two or more by hydraulic cylinders pivotable arms, which has two rows of lamps, with at least one with the individual cylinder cooperating pressure transducer are connected in dependence on prevailing in the cylinder hydraulic fluid pressure turned on or turned off, in the way that a first lamp is turned on in each row, when the pressure is low, after which gradually more and more lamps be turned on in the series when the pressure against a maximum permissible pressure increases, and the lamps are reversed in succession switched off when the pressure drops, the panel means for Display of violations of said maximum pressure.
  • Cranes for both lifting and other work tasks include, beside one Crane foot and a pillar, at least two hinged arms, namely a hinged to the pillar lifting arm and a with the Lift arm articulated connected swing arm.
  • Each of these arms is movable by means of an associated hydraulic cylinder, namely, the lifting and swinging arms by means of a lifting cylinder or a swing cylinder pivotally movable. All cylinders are connected to a common hydraulic system, which often makes sense Equipment for the operation of the crane, connected.
  • the crane can be quickly broken off by hand as needed may belong to this equipment.
  • a so-called belongs Overload protection which has the functions of the task Break off crane when the hydraulic fluid pressure in one of the cylinder reaches a maximum allowable working pressure, too the equipment.
  • An already known warning sign includes a triangular shaped Set of lamps in the form of light-emitting diodes, on the one hand blink when the hydra-pressure in one of the cylinders of the crane is 90% reached the maximum allowable pressure (100%), on the other hand with a solid glow when the overload protection is activated and the crane stops, ie when the hydrautruck reaches 100%.
  • this warning panel provides no indication at all Which cylinder limits the lifting power, and also no information about in which only one cylinder or possibly several cylinders the have reached the maximum allowable pressure.
  • Warning sign comprises two sets of light-emitting diodes, of which one of the pressure load in percent for the most heavily loaded Hydraulic cylinder indicates while the other indicates which cylinder meant is.
  • this table provides only information about the am highest loaded hydraulic cylinder, while information on the rest Cylinders completely missing.
  • the present invention has the object the above-mentioned disadvantages to eliminate the already known warning sign for cranes and improved Warning sign to create.
  • a basic object of the invention is thus a warning sign, which gives the surgeon requirements in a thoughtfully simple way to perceive timely to what extent one or more sturgeon commando on the way is to one Trigger the overload protection, to create.
  • Words has the warning sign at any moment during crane operation To explain to the surgeon, how far an immediate danger an interruption of service exists without the condition that the Surgeon to engage in a complicated and time-consuming thought activity Has. All of this has the purpose of unnecessary business interruptions to avoid.
  • a warning sign of the type mentioned above is disclosed by EP 0 236 804 already known.
  • this well-known warning sign belong at all no cylinder symbols and even less a silhouetted one Crane symbol indicating to the eye and thought directly to which Cylinder belong to the respective lamp rows.
  • the normal load condition or overload condition with the help of special Lamps are displayed which are separate from the pressure-indicating ones Lamp rows are placed.
  • the warning board includes not more than one row of lamps, which also has one placed separately on the board mounted crane symbol.
  • FIG. 1 shows the most important parts of a conventional Crane of the bending arm style illustrated.
  • this crane comprises two Arms, namely a lifting arm 3 and a swing arm 4.
  • the lifting arm. 3 is connected by a first joint 5 with the pillar 2, while a second joint 6 connects the swing arm 4 with the lifting arm 3.
  • the Arms 3, 4 are thus by the joints 5, 6 pivotally.
  • the crane points two hydraulic cylinders in order to obtain necessary pivoting movements, namely a lifting cylinder 7 for operating the lifting arm 3, and a swing cylinder 8 for operating the swing arm 4.
  • Swing arm 4 can advantageously - although not necessarily -
  • All cylinders are parts of a common hydraulic system, a so-called Overload protection, which includes the application of at least a pressure transducer for each hydraulic cylinder (not shown) based is, which continuously information about the in the respective hydraulic cylinder prevailing pressure to a central control unit (not shown) supplies.
  • a warning sign is connected to this control unit, and this will be described below.
  • the panel 11 shown in Figure 2 has the shape of a rectangular disc, which in fact as an externally visible end wall of a shell which includes a number of electrical components for u a a number houses of lamps of the table.
  • a Hole for an emergency stop button 12 available, with the help of the operation The crane can be completely stopped by hand as needed can.
  • the board has a stylized, silhouetted crane symbol, which generally designated 13 and in the present case two Cylinder symbols 14, 15 comprising, which with a set of lamps cooperate and that are shown in the preferred embodiment the invention four lamps in connection to each one Cylinder symbol provided, namely a first lamp 16, which turned on as soon as the hydraulic cylinder to be relatively moderate partial pressure works, e.g. 50%; a second Lamp 17, which is switched on as soon as the working pressure is higher, although still at a moderate level, e.g. 70%; a third Lamp 18 turned on when the working pressure a little lower than the maximum allowable pressure, e.g. 90% of the latter Pressure, as well as a fourth lamp 19, which is turned on when the maximum allowable pressure (100%) is reached. Conversely, the Lamps turned off one after the other when the prevailing working pressure falls below the stated pressure levels.
  • a first lamp 16 which turned on as soon as the hydraulic cylinder to be relatively moderate partial pressure works, e.g. 50%
  • a second Lamp 17 which is switched on as soon
  • the lamps 16-19 are in the cylinder symbol 14 and 15 respectively, d h between the two parallel lines which form the cylinder silhouette, the lamp 16, which is the lowest Pressure level indicates, at the bottom or innermost in the respective cylinder symbol is placed, and the lamp 19, which is the highest pressure level (100%), is placed on top or placed.
  • light-emitting diodes are preferred. At least some of These LEDs, namely the diodes 16, 17, are advantageously of the kind that can shine with different colors, e.g. green or red, where the color of the light of how one or more diodes other diodes light up or have not been made dependent.
  • Farther may advantageously have one or more diodes with either one fixed or flashing bill depending on how one or more other lamps are lit or not working.
  • the first two light emitting diodes 16, 17 thus be designed so that they on the one hand with green or red glow, on the other hand shine with firm or blinking glow can.
  • the third light-emitting diode 18 can be designed such that it lights up with red glow, which is either solid or flashing.
  • the fourth light-emitting diode 19 can be lit with only one fixed, be provided red glow.
  • the crane symbol 13 on the warning sign also includes a fifth Lamp or light emitting diode 20 in a circular wind symbol 21 is located.
  • This LED can be flashing red work when the Hydraultik in a belonging to a crane Winch (not shown) reaches 90% of maximum allowable pressure, and with a solid, red glow when reaching the maximum pressure (100%) becomes.
  • the warning panel 11 a number of symbols and associated light emitting diodes on.
  • a light-emitting diode is thus connected to a tool symbol 22 provided. These inform the surgeon about the Need maintenance when the LED lights up.
  • the symbol 23 gives the information to what extent a vehicle-borne crane is within the permissible stability sector, depending on how much a cooperating LED is turned on or not.
  • a symbol 24 cooperates with a light emitting diode to indicate in what way the crane is off or ready to start.
  • the blackboard can also additional function icons and related ones Have light-emitting diodes, as indicated at 25, 26 and 27.
  • FIGs. 2-7 A number of examples of different operating or functional states of the crane are shown in Figs. 2-7.
  • the luminous LED (indicated by the field marked in black) shows in Connection to the symbol 24 in Figure 2, that the crane is in operation.
  • the LED 16 of the cylinder symbol 14 is switched on and lights up with a solid, green glow to indicate that the lifting cylinder 7 of the Cranes with at least 50% hydro pressure work, d h far below the maximum permissible working pressure.
  • the light emitting diodes 16, 17 in the cylinder symbol 15 glow with firm, green glow and indicate that the oscillating cylinder 8 operates at 70% pressure or more.
  • the warning board according to FIG 2 the operator information, the say that the crane works normally without any immediate danger Triggered by the overload protection of the hydraulic system stopped to become.
  • the two LEDs 16, 17 in each of the cylinder symbols 14, 15th are turned on in Figure 3 and shine with a firm, green glow.
  • the light-emitting diode 20 is activated and flashes with red glow, indicating that the hydraultik of the winds at least 90% of the maximum allowable pressure. In this way it will be the Surgeon allows to take the necessary measures are to prevent the working pressure of the winch from reaching the maximum permissible pressure reached.
  • the operating state according to FIG. 4 differs from the state 3 only by the fact that the wind pressure is normal and that the LED following the tool icon 22 indicates that the crane requires maintenance.
  • the pressure in the oscillating cylinder 8 has reached the maximum allowable working pressure, ie h 100%, with all four LEDs 16, 17, 18, 19 of the cylinder symbol 15 with solid, red glow.
  • the overload protection triggered and stopped the crane, but since all LEDs 16-19 have been activated in the cylinder symbol 15 are, the surgeon receives the information that just the oscillating cylinder 8 reached 100% pressure and triggered the overload protection. In other words, the surgeon can quickly find other sources of Exclude interruption and the necessary measures with regard to just grab the swing arm and its cylinder.
  • the surgeon is capable of a clear and easy to understand Way without delay the individually prevailing pressure state in each of the two hydraulic cylinders 7, 8 determine what normally for triggering or not overload protection of the Hydraulics is the deciding factor. In other words, the surgeon receives good opportunities to operate the crane in such a way that eliminates the danger of unnecessary interruptions or vigorous is reduced.
  • the invention is not limited to that described above and to the Drawings shown embodiment limited.
  • the Number of LEDs or lamps in each cylinder symbol from just four, both up and down differ. It is desirable in itself the number of lamps in each Symbol, e.g. up to 5 to 8 if the physical place Possibility to do so on the blackboard. With an increased number of lamps in each cylinder symbol, the resolution of the obtained printing information improved.

Abstract

Panel (11) has two rows of lamps activated depending on pressures in hydraulic cylinders operating two or more pivotable arms. More lamps are lit as the pressure increases and the panel indicates when a maximum permitted pressure is exceeded. The panel shows a stylized silhouette crane symbol (13) with two inclined cylinder symbols and lamp symbols (16-19) placed in relation to the cylinder symbols to enable distinction between the cylinders.

Description

Technisches Gebiet der ErfindungTechnical field of the invention

Diese Erfindung bezieht sich auf eine Warntafel für Biegarmkräne mit zwei oder mehr mittels Hydraulzylinder schwenkbaren Armen, welche zwei Reihen von Lampen aufweist, die mit mindestens einem mit dem einzelnen Zylinder zusammenwirkenden Druckgeber verbunden sind, um in Abhängigkeit des in dem Zylinder herrschenden Hydraulflüssigkeitsdruckes angeschaltet bzw ausgeschaltet zu werden, und zwar in der Weise, dass eine erste Lampe in jeder Reihe angeschaltet wird, wenn der Druck niedrig ist, wonach allmählich mehr und mehr Lampen in der Reihe angeschaltet werden, wenn der Druck gegen einen maximal zulässigen Druck ansteigt, und die Lampen werden umgekehrt nacheinander ausgeschaltet, wenn der Druck sinkt, wobei die Tafel Mittel zum Anzeigen von Überschreitungen des genannten Maximaldruckes aufweist.This invention relates to a warning sign for bending arm cranes two or more by hydraulic cylinders pivotable arms, which has two rows of lamps, with at least one with the individual cylinder cooperating pressure transducer are connected in dependence on prevailing in the cylinder hydraulic fluid pressure turned on or turned off, in the way that a first lamp is turned on in each row, when the pressure is low, after which gradually more and more lamps be turned on in the series when the pressure against a maximum permissible pressure increases, and the lamps are reversed in succession switched off when the pressure drops, the panel means for Display of violations of said maximum pressure.

Hintergrund der ErfindungBackground of the invention

Kräne für sowohl Heben als auch andere Arbeitsaufgaben, z.B. fahrzeuggetragene Kräne von der Stückwarenart, umfassen, neben einem Kranfuss und einem Pfeiler, mindestens zwei schwenkbare Arme, nämlich ein mit dem Pfeiler gelenkig verbundener Hubarm und ein mit dem Hubarm gelenkig verbundener Schwingarm. Ein oder mehrere teleskopisch herausschiebbare Verlängerungsarme und gegebenenfalls ein schwenkbarer Arm oder "jib" auf dem äussersten Verlängerungsarm, können ausserdem Teil des Schwingarmes sein. Jeder von diesen Armen ist mit Hilfe eines dazu gehörenden Hydraulzylinders bewegbar, und zwar sind die Hub- und Schwingarme mit Hilfe eines Hubzylinders bzw. eines Schwingzylinders schwenkbar beweglich. Sämtliche Zylinder sind an ein gemeinsames Hydraulsystem, das eine öfters sinnreiche Ausrüstung für die Betätigung des Kranes aufweist, angeschlossen. Eine für den Kranoperateur sichtbare Warntafel mit einerseits einer Anzahl von Lampen, die verschiedene Betriebszustände des Kranes anzeigen, andererseits einem Notstoppknopf mit dessen Hilfe die Bewegungen des Kranes nach Bedarf schnell vom Hand abgebrochen werden können, gehören u a zu dieser Ausrüstung. Weiterhin gehört ein sogenannter Überlastschutz, welche die Aufgabe hat die Funktionen des Kranes abzubrechen, wenn der Hydraulflüssigkeitsdruck in einem der genannten Zylinder einen maximal zulässigen Arbeitsdruck erreicht, zu der Ausrüstung.Cranes for both lifting and other work tasks, e.g. vehicle-borne Cranes from the piece goods type, include, beside one Crane foot and a pillar, at least two hinged arms, namely a hinged to the pillar lifting arm and a with the Lift arm articulated connected swing arm. One or more telescopic push-out extension arms and optionally one swivel arm or "jib" on the outermost extension arm, may also be part of the swing arm. Each of these arms is movable by means of an associated hydraulic cylinder, namely, the lifting and swinging arms by means of a lifting cylinder or a swing cylinder pivotally movable. All cylinders are connected to a common hydraulic system, which often makes sense Equipment for the operation of the crane, connected. A warning sign visible to the crane operator with, on the one hand, a number of lamps indicating different operating conditions of the crane, on the other hand, an emergency stop button with the help of the movements The crane can be quickly broken off by hand as needed may belong to this equipment. Furthermore, a so-called belongs Overload protection, which has the functions of the task Break off crane when the hydraulic fluid pressure in one of the cylinder reaches a maximum allowable working pressure, too the equipment.

Bei Kräne ohne Verlängerungsarme ist normalerweise der Hubzylinder derjenige Zylinder, der die Hubkraft des Kranes begrenzt, aber wird der Winkel zwischen dem Hubarm und dem Schwingarm zu gross (ein zu aufrechter Kran) wird die Kraft in dem Schwingzylinder begrenzend für die Hubkraft des Kranes. Es ist nicht einmal leicht für erfahrene Kranoperateure einfach zu entscheiden welche von den Zylindern der begrenzend für die Hubkraft ist. Betriebsstatistik von einer grossen Anzahl von Kränen mit verschiedenen Fahrern zeigt, dass der Überlastschutz des Hydraulsystemes im Durchschnitt etwa dreimal pro Stunde aktiviert wird und den Kran stoppt, und dass 1/3 von diesen Stillständen von Überbelastung des Schwingzylinders abhängig sind. Die letztgenannten Stillstände wären nicht notwendig, würde der Operateur früh genug auf das Problem aufmerksam gemacht werden. Es ist notwendig, dass der Operateur eine oder mehrere momentreduzierenden Bewegungen, z.B. die Hub- und Schwingarme noch mehr zu winkeln, etc, ausführt, um sich von einem Stillstand aufgrund einer Überbelastung zu entfernen, um danach den Hubvorgang fortsetzen zu können. Diese Beschäftigung ist nicht nur zeitraubend aber ebenfalls im hohen Grad störend und irritierend. Bei Kränen mit einem oder mehreren Verlängerungsarmen wird die Situation weiter kompliziert, obwohl es in diesem Falle immer noch darum geht, dass die Belastung in dem Hubzylinder für das Erreichen einer maximalen Hubkraft kritisch ist. Es ist jedoch sehr schwierig, wenn nicht unmöglich, ohne besondere Hilfsmittel mit Sicherheit festzustellen, welcher oder welche Zylinder kritisch beaufschlagt sind. Die Kräne haben zeitweise auch andere Bauteile, die die Hubkraft zusätzlich begrenzen können, z.B. Winde und vom Hand herausschiebbare Arme, die an sich aussergewöhnliche Belastungen hervorrufen. Ein anderer hubkraftbegrenzende Faktor bei fahrzeuggetragenen Kränen ist die Stabilität des Fahrzeuges in einem bestimmten Sektor innerhalb des Schwenkgebietes des Krans.For cranes without extension arms is usually the lifting cylinder the cylinder that limits the lifting power of the crane, but becomes the Angle between the lift arm and the swing arm too large (one to upright crane) is the force in the oscillating cylinder limiting for the lifting power of the crane. It is not even easy for experienced crane operators easy to decide which of the cylinders the limiting for the lifting force. Operating statistics of a large number of cranes with different drivers shows that the overload protection activated by the hydraulic system on average about three times per hour and stop the crane, and that 1/3 of these stoppages of Overload of the oscillating cylinder are dependent. The latter Downtime would not be necessary if the surgeon were to get up early enough the problem be alerted. It is necessary that the Operator one or more moment-reducing movements, e.g. to bend the lifting and swinging arms even more, etc, to perform from a stoppage due to overloading to remove afterwards to continue the lifting process. This employment is not only time consuming but also disturbing and irritating to a high degree. For cranes with one or more extension arms is the situation further complicated, although in this case it still it is about that the load in the lifting cylinder for reaching a maximum lifting force is critical. It is very difficult, though not impossible to determine with certainty without special aids which or which cylinders are critically charged. The cranes have At times, other components that limit the lifting power in addition can, e.g. Winch and hand push-out arms on cause extraordinary stress. Another lifting force limiting The factor in vehicle-borne cranes is stability of the vehicle in a particular sector within the swivel area of the crane.

Stand der TechnikState of the art

Eine Vielzahl von verschiedenen Abwandlungen von Warntafeln mit der Aufgabe den Operateur über den Betriebszustand des Krans zu informieren, sind bei bereits bekannten, auf dem Markt zugänglichen Kränen vorhanden. Eine bereits bekannte Warntafel umfasst einen dreieckförmigen Satz von Lampen in der Form von Leuchtdioden, die einerseits blinken, wenn der Hydrauldruck in einem der Zylinder des Kranes 90% des maximal zulässigen Druckes (100%) erreicht, andererseits mit einem festen Schein leuchten, wenn der Überbelastungsschutz aktiviert wird und den Kran stoppt, d h wenn der Hydrauldruck 100% erreicht. Diese Warntafel liefert jedoch überhaupt keine Anzeige in bezug auf welche Zylinder die Hubkraft begrenzt, und auch keine Auskunft über inwiefern nur ein Zylinder oder möglicherweise mehrere Zylinder den dafür maximal zulässigen Druck erreicht haben. Eine andere bereits bekannte Warntafel umfasst zwei Sätze von Leuchtdioden, von welchen der eine die Druckbelastung in Prozent für den am höchsten belasteten Hydraulzylinder angibt, während der andere zeigt welche Zylinder gemeint ist. Diese Tafel liefert jedoch lediglich Auskünfte über den am höchsten belasteten Hydraulzylinder, während Auskünfte über die übrigen Zylinder ganz fehlen.A variety of different variations of warning signs with the Task to inform the operator about the operating status of the crane are in already known, accessible on the market cranes available. An already known warning sign includes a triangular shaped Set of lamps in the form of light-emitting diodes, on the one hand blink when the hydra-pressure in one of the cylinders of the crane is 90% reached the maximum allowable pressure (100%), on the other hand with a solid glow when the overload protection is activated and the crane stops, ie when the hydrautruck reaches 100%. However, this warning panel provides no indication at all Which cylinder limits the lifting power, and also no information about in which only one cylinder or possibly several cylinders the have reached the maximum allowable pressure. Another already known Warning sign comprises two sets of light-emitting diodes, of which one of the pressure load in percent for the most heavily loaded Hydraulic cylinder indicates while the other indicates which cylinder meant is. However, this table provides only information about the am highest loaded hydraulic cylinder, while information on the rest Cylinders completely missing.

Es ist für den Kranoperateur sehr schwierig rechtzeitig zu reagieren während des Zeitraumes, der dauert zwischen 90% und 100% der Druckbelastung, weil die Arme des Kranes während des Betriebes sich mit verhältnismässig hohen Geschwindigkeiten bewegen. Die Zunahme der Druckbelastung von 90% bis zu 100% erfolgt für eine in diesem Zusammenhang günstigen Kranarmbewegung (z.B. horizontal herausschieben) während 2 bis 3 Sekunden (Herausschiebgeschwindigkeit ungefähr 0.3 m/s), wogegen es sich um maximal eine Sekunde auch bei sehr vorsichtigen Hebelbewegungen bei ungünstigen Kranarmbewegungen handelt, z.B. eine Senkbewegung von einer hohen Höhe mit Hilfe von dem Hubzylinder. Es ist in der Praxis sehr schwierig für den Operateur eine allgemeine Warnung von der Warntafel unter solchen Umständen rechtzeitig aufzufassen und darauf reagieren.It is very difficult for the crane operator to react on time during the period that lasts between 90% and 100% of Compressive load because the arms of the crane during operation itself move at relatively high speeds. The increase The pressure load of 90% up to 100% takes place for one in this context favorable crane arm movement (for example push it out horizontally) for 2 to 3 seconds (push-out speed approximately 0.3 m / s), whereas it is a maximum of one second at very careful lever movements in the event of unfavorable crane arm movements acts, e.g. a lowering of a high altitude with the help from the lift cylinder. It is very difficult for the surgeon in practice a general warning from the warning sign under such circumstances to understand in time and to react to it.

Aufgaben und Merkmale der ErfindungObjects and features of the invention

Die vorliegende Erfindung hat die Aufgabe die obengenannten Nachteile der bereits bekannten Warntafel für Kräne zu beseitigen und eine verbesserte Warntafel zu schaffen. Eine grundliegende Aufgabe der Erfindung ist somit eine Warntafel, die dem Operateur Voraussetzungen gibt auf eine gedankenmässig einfache Weise rechtzeitig wahrzunehmen inwiefern ein oder mehrere Störekommandos auf dem Weg ist zu einer Auslösung des Überbelastungsschutzes zu führen, zu schaffen. Mit anderen Worten hat die Warntafel in jedem Augenblick während des Kranbetriebes dem Operateur klarzumachen, inwiefern eine baldige Gefahr einer Betriebsunterbrechung vorliegt, ohne die Bedingung, dass der Operateur eine komplizierte und zeitraubende Gedankentätigkeit heranzuziehen hat. All dies hat den Zweck unnötige Betriebsunterbrechungen zu vermeiden.The present invention has the object the above-mentioned disadvantages to eliminate the already known warning sign for cranes and improved Warning sign to create. A basic object of the invention is thus a warning sign, which gives the surgeon requirements in a thoughtfully simple way to perceive timely to what extent one or more sturgeon commando on the way is to one Trigger the overload protection, to create. With others Words has the warning sign at any moment during crane operation To explain to the surgeon, how far an immediate danger an interruption of service exists without the condition that the Surgeon to engage in a complicated and time-consuming thought activity Has. All of this has the purpose of unnecessary business interruptions to avoid.

Die obengenannte Aufgabe wird gemäss der Erfindung mit Hilfe der in dem kennzeichnenden Teil des Anspruchs 1 angegebenen Merkmale gelöst. Vorteilhafte Ausführungsformen der erfindungsgemässen Warntafel sind weiterhin in den abhängigen Ansprüchen definiert.The above object is according to the invention with the aid of in the characterizing part of claim 1 specified features solved. Advantageous embodiments of the inventive warning sign are further defined in the dependent claims.

Zusätzliche Erläuterung des Standes der TechnikAdditional explanation of the prior art

Eine Warntafel von der eingangs genannten Art ist durch EP 0 236 804 bereits bekannt. Zu dieser bekannten Warntafel gehören jedoch überhaupt keine Zylindersymbole und noch weniger ein silhouettenartiges Kransymbol, das für das Auge und den Gedanke direkt anzeigt zu welchem Zylinder die jeweiligen Lampenreihen gehören. Ausserdem wird der Normallastzustand bzw Überbelastungszustand mit Hilfe von besonderen Lampen angezeigt, welche getrennt von den druckanzeigenden Lampenreihen plaziert sind.A warning sign of the type mentioned above is disclosed by EP 0 236 804 already known. However, this well-known warning sign belong at all no cylinder symbols and even less a silhouetted one Crane symbol indicating to the eye and thought directly to which Cylinder belong to the respective lamp rows. In addition, will the normal load condition or overload condition with the help of special Lamps are displayed which are separate from the pressure-indicating ones Lamp rows are placed.

Es ist ebenfalls zu erwähnen, dass eine Warntafel für Kräne durch US 4 516 116 bereits bekannt ist. In diesem Falle umfasst die Warntafel jedoch nicht mehr als eine Lampenreihe, welche ausserdem von einem auf der Tafel angebrachten Kransymbol getrennt plaziert ist.It should also be noted that a warning sign for cranes by US 4 516 116 is already known. In this case, however, the warning board includes not more than one row of lamps, which also has one placed separately on the board mounted crane symbol.

Kurze Beschreibung der anliegenden ZeichnungenBrief description of the accompanying drawings

In den Zeichnungen sind:

  • Fig 1 eine einfache, schematische Seitenansicht, die den Aufbau eines herkömmlichen Kranes zeigt, und
  • Fig 2-7 Stirnansichte einer Warntafel gemäss der Erfindung, wobei die Tafel in verschiedenen Betriebszuständen in den verschiedenen Figuren gezeigt wird.
  • In the drawings are:
  • Figure 1 is a simple, schematic side view showing the structure of a conventional crane, and
  • Figures 2-7 are end views of a warning sign according to the invention, the sign being shown in different operating states in the different figures.
  • Bevor die erfindungsgemässe Warntafel im einzelnen beschrieben wird, wird es auf Fig 1 hingewiesen, welche die wichtigsten Teile eines herkömmlichen Kranes von der Biegarmart veranschaulicht. Neben einem Kranfuss 1 und einem drehbaren Pfeiler 2 umfasst dieser Kran zwei Arme, nämlich einen Hubarm 3 und einen Schwingarm 4. Der Hubarm 3 ist durch ein erstes Gelenk 5 mit dem Pfeiler 2 verbunden, während ein zweites Gelenk 6 den Schwingarm 4 mit dem Hubarm 3 verbindet. Die Arme 3, 4 sind somit durch die Gelenke 5, 6 schwenkbar. Der Kran weist zwei Hydraulzylinder auf, um erforderliche Schwenkbewegungen zu besorgen, nämlich einen Hubzylinder 7 zur Bedienung des Hubarms 3, und einen Schwingzylinder 8 zur Bedienung des Schwingarmes 4. In dem Schwingarm 4 können vorteilhafterweise - obwohl nicht notwendigerweise - ein oder mehrere zusätzlichen Arme 9, welche mit Hilfe eines jeweiligen Hydraulzylinders 10 aus dem Schwingarm heraus bzw. in den Schwingarm hinein teleskopisch verschiebbar sind. Sämtliche Zylindern sind Teile eines gemeinsamen Hydraulsystems, das einen sogenannten Überbelastungsschutz umfasst, welcher auf die Anwendung von mindestens einem Druckgeber für jeden Hydraulzylinder (nicht gezeigt) basiert ist, welche fortlaufend Auskünfte über den in dem jeweiligen Hydraulzylinder herrschenden Druck zu einer zentralen Steuereinheit (nicht gezeigt) liefert. An diese Steuereinheit ist eine Warntafel angeschlossen, und diese wird unten beschrieben werden. Before the warning sign according to the invention is described in detail, Reference is made to Figure 1, which shows the most important parts of a conventional Crane of the bending arm style illustrated. In addition to one Crane foot 1 and a rotatable pier 2, this crane comprises two Arms, namely a lifting arm 3 and a swing arm 4. The lifting arm. 3 is connected by a first joint 5 with the pillar 2, while a second joint 6 connects the swing arm 4 with the lifting arm 3. The Arms 3, 4 are thus by the joints 5, 6 pivotally. The crane points two hydraulic cylinders in order to obtain necessary pivoting movements, namely a lifting cylinder 7 for operating the lifting arm 3, and a swing cylinder 8 for operating the swing arm 4. In the Swing arm 4 can advantageously - although not necessarily - One or more additional arms 9, which by means of a respective hydraulic cylinder 10 out of the swing arm or in the Swing arm are telescopically slidable. All cylinders are parts of a common hydraulic system, a so-called Overload protection, which includes the application of at least a pressure transducer for each hydraulic cylinder (not shown) based is, which continuously information about the in the respective hydraulic cylinder prevailing pressure to a central control unit (not shown) supplies. A warning sign is connected to this control unit, and this will be described below.

    Detaillierte Beschreibung einer bevorzugten Ausführungsform der ErfindungDetailed description of a preferred embodiment of the invention

    Die in Fig 2 gezeigte Tafel 11 hat die Form einer rechteckigen Scheibe, welche in der Tat als eine von aussen sichtbare Stirnwand einer Hülle gehört, welche eine Anzahl von elektrischen Bauteilen für u a eine Anzahl von Lampen der Tafel beherbergt. In der Tafel ist weiterhin ein Loch für einen Notstoppknopfes 12 vorhanden, mit dessen Hilfe der Betrieb des Kranes nach Bedarf von der Hand vollständig gestoppt werden kann.The panel 11 shown in Figure 2 has the shape of a rectangular disc, which in fact as an externally visible end wall of a shell which includes a number of electrical components for u a a number houses of lamps of the table. In the blackboard is still a Hole for an emergency stop button 12 available, with the help of the operation The crane can be completely stopped by hand as needed can.

    Die Tafel weist ein stilisiertes, silhouettenartigen Kransymbol auf, welche allgemein mit 13 bezeichnet ist und in dem vorliegenden Fall zwei Zylindersymbole 14, 15 umfasst, welche mit einem Satz von Lampen zusammenwirken und zwar sind in der gezeigten, bevorzugten Ausführungsform der Erfindung vier Lampen im Anschluss zu jedem einzelnen Zylindersymbol vorgesehen, nämlich eine erste Lampe 16, die angeschaltet wird sobald der zuhörende Hydraulzylinder mit einem ersten, verhältnismässig mässigen Teildruck arbeitet, z.B. 50%; eine zweite Lampe 17, die angeschaltet wird sobald der Arbeitsdruck ein höheres, obwohl immer noch mässiges Niveau erreicht, z.B. 70%; eine dritte Lampe 18, die angeschaltet wird wenn der Arbeitsdruck wenig niedriger als den maximal zulässigen Druck ist, z.B. 90% des letztgenannten Druckes, sowie eine vierte Lampe 19, die angeschaltet wird wenn den maximal zulässigen Druck (100%) erreicht wird. Umgekehrt werden die Lampen nacheinander ausgeschaltet wenn der herrschende Arbeitsdruck unter den genannten Druckniveaus sinkt.The board has a stylized, silhouetted crane symbol, which generally designated 13 and in the present case two Cylinder symbols 14, 15 comprising, which with a set of lamps cooperate and that are shown in the preferred embodiment the invention four lamps in connection to each one Cylinder symbol provided, namely a first lamp 16, which turned on as soon as the hydraulic cylinder to be relatively moderate partial pressure works, e.g. 50%; a second Lamp 17, which is switched on as soon as the working pressure is higher, although still at a moderate level, e.g. 70%; a third Lamp 18 turned on when the working pressure a little lower than the maximum allowable pressure, e.g. 90% of the latter Pressure, as well as a fourth lamp 19, which is turned on when the maximum allowable pressure (100%) is reached. Conversely, the Lamps turned off one after the other when the prevailing working pressure falls below the stated pressure levels.

    In dem bevorzugten Beispiel sind die Lampen 16-19 in dem Zylindersymbol 14 bzw. 15 plaziert, d h zwischen den beiden parallelen Linien die die Zylindersilhouette bilden, wobei die Lampe 16, die das niedrigste Druckniveau anzeigt, zu unterst bzw. zu innerst in dem jeweiligen Zylindersymbol plaziert ist, und die Lampe 19, die das höchste Druckniveau (100%) anzeigt, zu oberst bzw. äusserst plaziert ist. Obwohl die Erfindung mit Hilfe von beliebigen Lampen verwirklicht werden kann, werden in der Praxis Leuchtdioden bevorzugt. Wenigstens einige von diesen Leuchtdioden, nämlich die Dioden 16, 17, sind vorteilhafterweise von der Art, die mit verschiedenen Farben leuchten kann, z.B. grün bzw. rot, wobei die Farbe des Lichtes von inwiefern eine Diode oder mehrere andere Dioden leuchten oder nicht abhängig gemacht worden ist. Weiterhin können mit Vorteil eine oder mehrere Dioden mit entweder einem festen oder blinkenden Schein in Abhängigkeit inwiefern eine oder mehrere andere Lampen leuchten oder nicht arbeiten. Von den vier Leuchtdioden in jedem Zylindersymbol können die beiden ersten Leuchtdioden 16, 17 somit derart gestaltet sein, dass sie einerseits mit grünem oder rotem Schein, anderseits mit festem oder blinkendem Schein leuchten können. Die dritte Leuchtdiode 18 kann dabei derart gestaltet sein, dass sie mit rotem Schein leuchtet, welcher entweder fest oder blinkend ist. Die vierte Leuchtdiode 19 kann zum Leuchten mit lediglich einem festen, roten Schein vorgesehen sein.In the preferred example, the lamps 16-19 are in the cylinder symbol 14 and 15 respectively, d h between the two parallel lines which form the cylinder silhouette, the lamp 16, which is the lowest Pressure level indicates, at the bottom or innermost in the respective cylinder symbol is placed, and the lamp 19, which is the highest pressure level (100%), is placed on top or placed. Although the Invention can be realized with the help of any lamps, In practice, light-emitting diodes are preferred. At least some of These LEDs, namely the diodes 16, 17, are advantageously of the kind that can shine with different colors, e.g. green or red, where the color of the light of how one or more diodes other diodes light up or have not been made dependent. Farther may advantageously have one or more diodes with either one fixed or flashing bill depending on how one or more other lamps are lit or not working. Of the four LEDs in each cylinder symbol, the first two light emitting diodes 16, 17 thus be designed so that they on the one hand with green or red glow, on the other hand shine with firm or blinking glow can. The third light-emitting diode 18 can be designed such that it lights up with red glow, which is either solid or flashing. The fourth light-emitting diode 19 can be lit with only one fixed, be provided red glow.

    Zu dem Kransymbol 13 auf der Warntafel gehört ebenfalls eine fünfte Lampe oder Leuchtdiode 20, die in einem kreisförmigen Windesymbol 21 gelegen ist. Diese Leuchtdiode kann mit blinkendem, rotem Schein arbeiten, wenn der Hydrauldruck in einer zu einem Kran gehörenden Winde (nicht gezeigt) 90% des maximal zulässigen Druckes erreicht, und mit festem, rotem Schein wenn den Maximaldruck (100%) erreicht wird.The crane symbol 13 on the warning sign also includes a fifth Lamp or light emitting diode 20 in a circular wind symbol 21 is located. This LED can be flashing red work when the Hydrauldruck in a belonging to a crane Winch (not shown) reaches 90% of maximum allowable pressure, and with a solid, red glow when reaching the maximum pressure (100%) becomes.

    Auch neben dem eigentlichen Kranzsymbol 13 weist die Warntafel 11 eine Anzahl von Symbolen und damit zusammenwirkenden Leuchtdioden auf. Eine Leuchtdiode ist somit im Anschluss zu einem Werkzeugsymbol 22 vorgesehen. Diese informieren den Operateur über den Bedarf von Wartung, wenn die Leuchtdiode aufleuchtet. Der Symbol 23 gibt die Auskunft inwiefern ein fahrzeuggetragener Kran sich innerhalb des zulässigen Stabilitätssektors befindet, in Abhängigkeit davon inwiefern eine zusammenwirkende Leuchtdiode angeschaltet ist oder nicht. Ein Symbol 24 wirkt mit einer Leuchtdiode zusammen, um anzuzeigen inwiefern der Kran abgeschaltet oder startbereit ist. Die Tafel kann ebenfalls zusätzliche Funktionssymbole und damit zusammenwirkende Leuchtdioden aufweisen, wie es bei 25, 26 und 27 angedeutet wird. Also next to the actual wreath symbol 13, the warning panel 11 a number of symbols and associated light emitting diodes on. A light-emitting diode is thus connected to a tool symbol 22 provided. These inform the surgeon about the Need maintenance when the LED lights up. The symbol 23 gives the information to what extent a vehicle-borne crane is within the permissible stability sector, depending on how much a cooperating LED is turned on or not. A symbol 24 cooperates with a light emitting diode to indicate in what way the crane is off or ready to start. The blackboard can also additional function icons and related ones Have light-emitting diodes, as indicated at 25, 26 and 27.

    Die Funktion und Vorteile der erfindungsgemässen WarntafelThe function and advantages of the warning sign according to the invention

    Eine Anzahl von Beispielen von verschiedenen Betriebs- oder Funktionszuständen des Kranes werden in Fig 2-7 gezeigt. Die leuchtende Leuchtdiode (angezeigt durch das mit schwarz markierte Feld) zeigt im Anschluss zum Symbol 24 in Fig 2, dass der Kran im Betrieb ist. Die Leuchtdiode 16 des Zylindersymbols 14 ist angeschaltet und leuchtet mit festem, grünem Schein, um anzuzeigen, dass der Hubzylinder 7 des Kranes mit mindestens 50% Hydrauldruck arbeitet, d h weit unter dem maximal zulässigen Arbeitsdruck. Die Leuchtdioden 16, 17 in dem Zylindersymbol 15 leuchten mit festem, grünem Schein und anzeigen, dass der Schwingzylinder 8 mit 70% Druck oder mehr arbeitet. Anders ausgedrückt gibt die Warntafel gemäss Fig 2 dem Operateur Auskünfte, die sagen, dass der Kran normal arbeitet ohne unmittelbare Gefahr durch Auslösung von dem Überbelastungsschutz des Hydraulsystemes gestoppt zu werden.A number of examples of different operating or functional states of the crane are shown in Figs. 2-7. The luminous LED (indicated by the field marked in black) shows in Connection to the symbol 24 in Figure 2, that the crane is in operation. The LED 16 of the cylinder symbol 14 is switched on and lights up with a solid, green glow to indicate that the lifting cylinder 7 of the Cranes with at least 50% hydro pressure work, d h far below the maximum permissible working pressure. The light emitting diodes 16, 17 in the cylinder symbol 15 glow with firm, green glow and indicate that the oscillating cylinder 8 operates at 70% pressure or more. In other words gives the warning board according to FIG 2 the operator information, the say that the crane works normally without any immediate danger Triggered by the overload protection of the hydraulic system stopped to become.

    Die beiden Leuchtdioden 16, 17 in jedem der Zylindersymbole 14, 15 sind in Fig 3 angeschaltet und leuchten mit festem, grünem Schein. Ausserdem ist die Leuchtdiode 20 aktiviert und blinkt mit rotem Schein, wodurch angezeigt wird, dass der Hydrauldruck der Winde mindestens 90% des maximal zulässigen Druckes ist. Auf diese Weise wird es dem Operateur ermöglicht die Massnahmen zu ergreifen, die erforderlich sind, um zu verhindern, dass der Arbeitsdruck der Winde den maximal zulässigen Druck erreicht.The two LEDs 16, 17 in each of the cylinder symbols 14, 15th are turned on in Figure 3 and shine with a firm, green glow. In addition, the light-emitting diode 20 is activated and flashes with red glow, indicating that the hydrauldruck of the winds at least 90% of the maximum allowable pressure. In this way it will be the Surgeon allows to take the necessary measures are to prevent the working pressure of the winch from reaching the maximum permissible pressure reached.

    Der Betriebszustand nach Fig 4 unterscheidet sich von dem Zustand nach Fig 3 lediglich dadurch, dass der Windedruck normal ist und dass die Leuchtdiode im Anschluss an das Werkzeugsymbol 22 anzeigt, dass der Kran Wartung verlangt.The operating state according to FIG. 4 differs from the state 3 only by the fact that the wind pressure is normal and that the LED following the tool icon 22 indicates that the crane requires maintenance.

    In Fig 5 leuchtet die beiden ersten Leuchtdioden 16, 17 des Zylindersymbols 14 immer noch mit festem, grünem Schein, während dagegen die Leuchtdioden 16, 17, 18 des Zylindersymbols 15 mit rotem Licht blinken. In der Weise wird angezeigt, dass der im Schwingzylinder 8 herrschende Druck 90% des zulässigen Druckes überschreitet. In Fig. 5, the first two LEDs 16, 17 of the cylinder symbol illuminate 14 still with a firm, green glow, while against the LEDs 16, 17, 18 of the cylinder symbol 15 with red light flash. In the way it is indicated that in the oscillating cylinder. 8 prevailing pressure exceeds 90% of the permissible pressure.

    In dem Betriebszustand nach Fig 6 hat der Druck im Schwingzylinder 8 den maximal zulässigen Arbeitsdruck erreicht, d h 100%, wobei sämtliche vier Leuchtdioden 16, 17, 18, 19 des Zylindersymboles 15 mit festem, rotem Schein leuchten. In diesem Zustand ist der Überbelastungsschutz ausgelöst und den Kran gestoppt worden, aber da sämtliche Leuchtdioden 16-19 in dem Zylindersymbol 15 aktiviert worden sind, erhält der Operateur die Auskunft, dass gerade der Schwingzylinder 8 100% Druck erreicht und den Überbelastungsschutz ausgelöst hat. Mit anderen Worten kann der Operateur schnell andere Quellen der Unterbrechung ausschliessen und die notwendigen Massnahmen in bezug auf gerade den Schwingarm und dessen Zylinder ergreifen.In the operating state according to FIG. 6, the pressure in the oscillating cylinder 8 has reached the maximum allowable working pressure, ie h 100%, with all four LEDs 16, 17, 18, 19 of the cylinder symbol 15 with solid, red glow. In this condition is the overload protection triggered and stopped the crane, but since all LEDs 16-19 have been activated in the cylinder symbol 15 are, the surgeon receives the information that just the oscillating cylinder 8 reached 100% pressure and triggered the overload protection. In other words, the surgeon can quickly find other sources of Exclude interruption and the necessary measures with regard to just grab the swing arm and its cylinder.

    In dem Zustand nach Fig 7 arbeiten die beiden Zylinder 7, 8 mit normalem Druck (zwischen 70-90%), aber hier zeigen die Leuchtdiode im Anschluss zu dem Symbol 23, dass der Kran als ganze bis zu einer Lage ausserhalb des Stabilitätsektors für das Fahrzeug auf welchem der Kran montiert ist gedreht worden ist. Der Operateur hat deshalb den Kran sofort zu einer stabilen Drehwinkellage zurückzuführen.In the state of Fig. 7, the two cylinders 7, 8 operate with normal Pressure (between 70-90%), but here are the LEDs in the connection to the symbol 23 that the crane as a whole up to a location outside the stability sector for the vehicle on which the crane is mounted has been turned. The surgeon therefore has the crane immediately due to a stable angular position.

    Es ist ein grundliegender Vorteil der erfindungsgemässen Warntafel, dass der Operateur fähig ist auf eine überschauliche und leichtverständliche Weise ohne Verzögerung den einzeln herrschenden Druckzustand in jedem der beiden Hydraulzylinder 7, 8 festzustellen, was normalerweise für eine Auslösung oder nicht des Überbelastungsschutzes des Hydraulsystems entscheiden ist. Mit anderen Worten erhält der Operateur gute Möglichkeiten den Kran in einer derartigen Weise zu betätigen, dass die Gefahr von unnötigen Unterbrechungen eliminiert oder kräftig reduziert wird.It is a basic advantage of the warning panel according to the invention, that the surgeon is capable of a clear and easy to understand Way without delay the individually prevailing pressure state in each of the two hydraulic cylinders 7, 8 determine what normally for triggering or not overload protection of the Hydraulics is the deciding factor. In other words, the surgeon receives good opportunities to operate the crane in such a way that eliminates the danger of unnecessary interruptions or vigorous is reduced.

    Denkbare Modifizierungen der ErfindungConceivable modifications of the invention

    Die Erfindung ist nicht nur zu der oben beschriebenen und auf den Zeichnungen gezeigten Ausführungsform beschränkt. Somit kann die Anzahl von Leuchtdioden oder Lampen in jedem einzelnen Zylindersymbol von gerade der Anzahl vier sowohl nach oben als auch nach unten abweichen. Es ist an sich erstrebenswert die Anzahl von Lampen in jedem Symbol zu erhöhen, z.B. bis zu 5 bis 8, wenn der physische Platz auf der Tafel Möglichkeit dazu gibt. Mit einer erhöhten Anzahl von Lampen in jedem Zylindersymbol wird die Auflösung der erhaltenen Druckauskunft verbessert.The invention is not limited to that described above and to the Drawings shown embodiment limited. Thus, the Number of LEDs or lamps in each cylinder symbol from just four, both up and down differ. It is desirable in itself the number of lamps in each Symbol, e.g. up to 5 to 8 if the physical place Possibility to do so on the blackboard. With an increased number of lamps in each cylinder symbol, the resolution of the obtained printing information improved.

    Claims (5)

    1. An alerting display panel for knuckle boom cranes of the type comprising two or more arms (3, 4) that are pivotable by means of hydraulic cylinders (7, 8), the display panel comprising two rows of lamps (16, 17, 18, 19) connected to at least one pressure sensor cooperating with each individual cylinder (7, 8) such that the lamps are switched on and switched off, respectively, in response to the existing pressure of the hydraulic liquid in the cylinder, and more precisely in such way, that a first lamp (16) in each row of lamps is switched on when said pressure is low, and the following lamps are successively switched on as the pressure gradually rises towards a maximum pressure allowed, and wherein the lamps are switched off in reversed order as the pressure gradually falls, the display panel further comprising means for indication of a pressure exceeding said maximum pressure, characterized in that a simplified, silhouette-shaped representation (13) of a crane is formed on the display panel (11), said representation comprising two symbolic cylinders (14, 15) angularly directed to each other, one of said symbolic cylinders representing a lift cylinder (7) and the other representing a rocker cylinder (8), and wherein said rows of lamps are located in association with the symbolic cylinders, that is to say at an angle to each other, in order for the naked eye and intellectually to instantly separate the operation of the lift and rocker cylinders, and wherein said means for indication of an exceeding of a maximum pressure is included in each individual row of lamps since at least one lamp (16, 17) is arranged to give light differently in response to the switching on or off of one or several other lamps in the subject row of lamps.
    2. The display panel of claim 1, characterized in that at least one lamp (16, 17) is arranged to give light at different colors in response to the switching on or off of one or more other lamps (18, 19).
    3. The display panel of claim 1 or 2, characterized in that at least one lamp (18) is arranged to give fixed or flashing light, alternatively, in response to the switching on or off of one or more other lamps (19).
    4. The display panel of any preceding claim, characterized in that each individual row of lamps (16, 17, 18, 19) is located between two parallel lines forming a symbolic cylinder.
    5. The display panel of any preceding claim, characterized in that the lamp (16) indicating the lowermost pressure level of a lift cylinder (7) is located at the lowermost position in the row of lamps associated with the representation (14) of the lift cylinder (7), and that the lamp (16) indicating the lowermost pressure level of a rocker cylinder (8) is located at the innermost position in the row of lamps associated with the representation (15) of the rocker cylinder (8).
    EP01850057A 2000-04-12 2001-03-29 Warning panel for cranes with foldable jib Expired - Lifetime EP1146006B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    SE0001344 2000-04-12
    SE0001344A SE521390C2 (en) 2000-04-12 2000-04-12 Warning panel for cranes

    Publications (3)

    Publication Number Publication Date
    EP1146006A2 EP1146006A2 (en) 2001-10-17
    EP1146006A3 EP1146006A3 (en) 2003-03-05
    EP1146006B1 true EP1146006B1 (en) 2005-05-11

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    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP01850057A Expired - Lifetime EP1146006B1 (en) 2000-04-12 2001-03-29 Warning panel for cranes with foldable jib

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    EP (1) EP1146006B1 (en)
    AT (1) ATE295331T1 (en)
    DE (1) DE50106165D1 (en)
    ES (1) ES2240390T3 (en)
    SE (1) SE521390C2 (en)

    Family Cites Families (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    SE422315B (en) * 1980-06-04 1982-03-01 Hiab Foco Ab OVERLOAD PROTECTION FOR HYDRAULIC DRIVE CRANES
    US4511974A (en) * 1981-02-04 1985-04-16 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Load condition indicating method and apparatus for forklift truck
    US4516116A (en) * 1981-12-16 1985-05-07 Safety Devices (Engineering) Limited Apparatus for visually displaying the load-moment, axle-load, or payload of a vehicle
    DE3607135A1 (en) * 1986-03-05 1987-09-10 Feldmuehle Ag METHOD FOR SIGNALING THE LOAD AND OVERLOAD
    KR20010021568A (en) * 1997-07-09 2001-03-15 추후제출 Capacity data monitor

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    Publication number Publication date
    EP1146006A2 (en) 2001-10-17
    SE0001344D0 (en) 2000-04-12
    SE0001344L (en) 2001-10-13
    ATE295331T1 (en) 2005-05-15
    SE521390C2 (en) 2003-10-28
    ES2240390T3 (en) 2005-10-16
    EP1146006A3 (en) 2003-03-05
    DE50106165D1 (en) 2005-06-16

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