EP1669320B1 - Floor conveyor comprising a liftable device for picking up loads - Google Patents

Floor conveyor comprising a liftable device for picking up loads Download PDF

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Publication number
EP1669320B1
EP1669320B1 EP05026403A EP05026403A EP1669320B1 EP 1669320 B1 EP1669320 B1 EP 1669320B1 EP 05026403 A EP05026403 A EP 05026403A EP 05026403 A EP05026403 A EP 05026403A EP 1669320 B1 EP1669320 B1 EP 1669320B1
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EP
European Patent Office
Prior art keywords
lifting
range
lifting range
special
load
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EP05026403A
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German (de)
French (fr)
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EP1669320B2 (en
EP1669320A1 (en
Inventor
Francois Brouart
Paulo Ferreira
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STILL SAS
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STILL SAS
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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
    • B66F17/003—Safety devices, e.g. for limiting or indicating lifting force for fork-lift trucks

Definitions

  • the invention relates to an industrial truck with a liftable load-receiving means, the lifting area of the load-receiving means being subdivided into at least two areas and unrestricted lifting and lowering functions being controllable in a first lifting area (normal lifting area A), while in at least one further lifting area (special lifting area B) at least one Lifting function can only be activated by operating at least one special switch,.
  • Such trucks are used to record loads in the in-house goods transport both near the ground and at higher altitudes or can settle.
  • a generic vehicle is in the US 5,906,648 shown. Since industrial buildings were frequently constructed before such trucks were used, sometimes heights in certain areas and heights under obstacles are lower than the maximum lifting height of a truck. If such a situation is not noticed by the truck operator in time and the maximum permitted lifting height in these areas is exceeded, severe damage to the load or the truck may occur. To avoid this, the maximum lifting height can be limited to a safe level, but it is no longer possible to exploit the greater height of other building parts for storage purposes. There are also operating situations possible in which by deep lowering of the lifting device this can be damaged, in which it rests on the ground or when driving movements in the direction of the load-receiving means to an obstacle, such as a threshold, butts.
  • the invention is therefore based on the object, an industrial truck with a liftable load receiving means, wherein the lifting range of the load receiving means is divided into at least two areas and in a first stroke range (Normalhub Scheme A) unrestricted lifting and lowering functions are controlled, while in at least one further stroke range ( Sonderhub Scheme B) at least one lifting function can be activated only by operating at least one special switch to create, in which the risk of damage to cargo and / or truck by careless Use, especially at particularly high or low lifting heights, is significantly reduced.
  • a first stroke range Normalhub Scheme A
  • Unrestricted lifting and lowering functions are controlled
  • at least one further stroke range At least one lifting function can be activated only by operating at least one special switch to create, in which the risk of damage to cargo and / or truck by careless Use, especially at particularly high or low lifting heights, is significantly reduced.
  • At least one Sonderhub Scheme is arranged above the Normalhubrios. This avoids that the load-carrying means is unintentionally raised too high and it collides with obstacles above the vehicle, such as ceilings, wire bridges or lamps.
  • At least one Sonderhub Scheme is arranged below the Normalhub ceremoniess. This avoids that the load-carrying means is accidentally lowered too far and it comes to collisions with obstacles located on the ground, such as thresholds, shelves or support boards of pallets. The load handler can not be lowered to the ground out of inattention.
  • means for displaying the stroke range are provided. This informs an operator whether the load-carrying means is in a special lifting area and therefore greater attention and the operation of the special stroke is necessary.
  • a visual display preferably in the form of differently colored display elements, is provided as the means for displaying the stroke range.
  • Optical displays are easily detectable, do not affect the environment and are easy to produce. In particular, different colored display elements are clearly and easily detectable at a glance.
  • the size of the stroke areas can be fixed as a function of the distance of an obstacle from the footprint of the industrial truck. This adjusts the size of the special lifting areas to the current dangers. Longer stroke distances in Sonderhub Scheme, i. with the special lift switch depressed, which may cause the operator's attention to lessen. In areas without obstacles, a simple and productive handling of the truck is guaranteed.
  • FIG. 1 schematically shows a stacker 1 according to the invention with a marking of the normal stroke A and the Sonderhub Schemes B.
  • the stacker 1 is divided into a drive part 2 and a load part 3.
  • control unit for controlling the drive and lifting functions is housed in the drive part 2 of the drive motor not shown here for the steerable drive wheel 4 and a likewise not shown control unit for controlling the drive and lifting functions is housed.
  • the drive part 2 battery which serves to power the high-lift truck 1.
  • the vehicle 1 is steered by means of a drawbar 5, whereby operating elements 7 for controlling the functions of the industrial truck 1 are mounted on the dike head 6.
  • the load part 3 of the truck 1 comprises a mast 8 on which a liftable load-receiving means 9 is guided.
  • the mast 8 is composed of an outer, fixed part, the so-called stationary mast 10 and an inner part which can be extended upward, the so-called mast 11.
  • the load-carrying means 9 is fork-shaped and located in the position I, in for example, pallets or lattice boxes can be picked up from the ground.
  • the load-receiving means 9 is moved by a hydraulic cylinder, not shown here on the mast 8 upwards and thus finally reaches the position II.
  • the mast 11 remains in this process in position. If greater lifting heights are to be achieved, the vertical movement of the load receiving means 9 is generated by the extension of the traveling mast 11, while the load receiving means 9 with respect to the mast 11 does not change its position. In this way, the position III is achieved in continuation of the lifting movement.
  • the position III is the end of the Normalhub Schemes A. Above this, the Sonderhub Scheme B starts with the maximum stroke position IV.
  • the lifting height is determined by a not shown here Hub Ecknmessvortechnisch according to the prior art.
  • the strokes are controlled by controls 7, which are attached to the tiller head 6.
  • the tiller head 6 is in FIG. 2 shown schematically in plan view.
  • the driving functions of the truck 1 are controlled via wing switches 12, as is known in vehicles according to the prior art.
  • a safety switch 13 and a switch 14 for actuating an acoustic warning device are present.
  • the strokes of the truck 1 are controlled by the switches 15 and 16, wherein the switch 15 causes lifting of the load-receiving means 9, while upon actuation of the switch 16 this is lowered.
  • a display device 17 is present, which is essentially formed by a green light emitting diode 18 and a red light emitting diode 19.
  • the green light-emitting diode 18 lights up and thus signals the operator that unrestricted lifting functions are available. If the load-carrying means 9 reaches the end of the normal lifting range (corresponding to position III in FIG. 1 ), the load receiving means 9 is stopped. If the operator now actuates one of the special lifting switches 20a, 20b and at the same time the lifting switch 15, the load receiving means 9 continues to move upwards. The green LED 18 is deactivated and the red LED 19 lights up. As a result, the operator can recognize that the load-receiving means 9 is located in the special lifting area B.
  • the load-receiving means 9 can be raised to the maximum stroke position IV, which is predetermined by the extension path of the driving mast 11.
  • the lifting speed is significantly reduced during the upward movement of the load receiving means 9 within the Sonderhub Schemes B simultaneously.
  • the determination of the Normalhub Schemes A is based on the lowest obstacle that can be expected at the site and the maximum expected height dimension of the loads to be transported, or if this is lower than the distance between the top 21 of a prong 22 of the lifting device 9 and the Upper edge 23 of the highest mast component, based on the distance of the upper edge
  • the normal lift range will extend to a height of 2.5 m.
  • a radar unit 24 is mounted in the upper part of the mast 8, which measures the distance to obstacles that are located above the truck. These data are transmitted wirelessly to the control unit of the truck 1, not shown here, which then determines the height from which the Sonderhub Scheme B begins.
  • FIG. 3a the case is shown in which there is no danger of collision with the ceiling 26 even at maximum lifting height and a load 25 with maximum height dimensions.
  • the entire stroke range is released as Normalhub Scheme A and the load receiving means 9 can be moved without activation of a Sonderhubschalters 20a, 20b over the entire stroke range.
  • FIG. 3b a situation is shown in which the height of the ceiling 27 is below the maximum lifting height of the truck 1.
  • a Sonderhub Scheme B is set.
  • the Sonderhub Scheme B extends almost completely up to the height in which a collision with the Hindemis takes place in each case by the upper edge 23 of the mast 8.
  • a collision of the load 25 is possible in this case, but less likely than in a vehicle according to em prior art, since the operator is particularly attentive in the special driving range.
  • the lifting range of the industrial truck can be fully utilized in this way.
  • FIG. 3 embodiment shown allows the operator to operate the lifting functions largely without concern for collisions with the ceiling or other hindrances.
  • the attention of the operator is particularly large. If the security area is too large, there is otherwise the danger that the operator's attention may decrease again during the course of the journey.
  • Hubeux can also be used, for example, mounted on the mast switch that detects the transition from Normalhub Society to Sonderhub Scheme.
  • the Hubfunktionen functions can be performed with undiminished speed in the special driving range.
  • a Sonderhub Scheme for example, in industrial trucks, where the load-bearing means can be lowered below the normal ground level or if obstacles, such as sleepers or heels, are present in the ground area.
  • Such a region is particularly advantageous when working in shelves or at a loading dock, where too much lowering of the load-carrying device may cause damage to the truck or the ramp or the shelf.
  • the display device may differ in type and attachment of the embodiment shown, for example, by an audible warning is provided or a visual display that attracts the attention of the operator by switching from steady light to flashing.

Abstract

Floor conveyor has lifting attachment (9) which operates in two ranges. In normal range (A) unrestricted elevation and lowering functions of platform is controllable while in special range (B) stroke function of platform is activated by means of special switch. The special lifting range of platform is above the normal lifting range.

Description

Die Erfindung betrifft ein Flurförderzeug mit einem anhebbaren Lastaufnahmemittel, wobei der Hubbereich des Lastaufnahmemittels in mindestens zwei Bereiche unterteilt ist und in einem ersten Hubbereich (Normalhubbereich A) uneingeschränkte Hebe- und Senkfunktionen ansteuerbar sind, während in mindestens einem weiteren Hubbereich (Sonderhubbereich B) mindestens eine Hubfunktion nur mittels Betätigung mindestens eines Sonderschalters aktivierbar ist,.The invention relates to an industrial truck with a liftable load-receiving means, the lifting area of the load-receiving means being subdivided into at least two areas and unrestricted lifting and lowering functions being controllable in a first lifting area (normal lifting area A), while in at least one further lifting area (special lifting area B) at least one Lifting function can only be activated by operating at least one special switch,.

Derartige Flurförderzeuge werden verwendet, um im innerbetrieblichen Warentransport Lasten sowohl bodennah als auch in größeren Höhen aufnehmen beziehungsweise absetzen zu können. Ein gattungsgemäßes Fahrzeug ist in der US 5,906,648 gezeigt. Da Gebäude von Industriebetrieben häufig erstellt wurden, bevor derartige Flurförderzeuge zum Einsatz kamen, sind bisweilen in einzelnen Bereichen Deckenhöhen und Durchfahrtshöhen unter Hindernissen niedriger als die maximale Hubhöhe eines Flurförderzeugs. Wird eine solche Situation von der Bedienperson des Flurförderzeugs nicht rechtzeitig bemerkt und die in diesen Bereichen maximal zulässige Hubhöhe überschritten, kann es zu schweren Beschädigungen des Ladegutes oder des Flurförderzeugs kommen. Um dies zu vermeiden, kann die maximale Hubhöhe auf ein ungefährliches Maß begrenzt werden, doch ist damit eine Ausnutzung der größeren Höhe anderer Gebäudeteile für Lagerzwecke nicht mehr möglich. Es sind auch Betriebssituationen möglich, bei denen durch zu tiefes Absenken des Lastaufnahmemittels dieses beschädigt werden kann, in dem es am Boden aufsitzt oder bei Fahrbewegungen in Richtung des Lastaufnahmemittels an ein Hindernis, beispielsweise eine Schwelle, stößt.Such trucks are used to record loads in the in-house goods transport both near the ground and at higher altitudes or can settle. A generic vehicle is in the US 5,906,648 shown. Since industrial buildings were frequently constructed before such trucks were used, sometimes heights in certain areas and heights under obstacles are lower than the maximum lifting height of a truck. If such a situation is not noticed by the truck operator in time and the maximum permitted lifting height in these areas is exceeded, severe damage to the load or the truck may occur. To avoid this, the maximum lifting height can be limited to a safe level, but it is no longer possible to exploit the greater height of other building parts for storage purposes. There are also operating situations possible in which by deep lowering of the lifting device this can be damaged, in which it rests on the ground or when driving movements in the direction of the load-receiving means to an obstacle, such as a threshold, butts.

Der Erfindung liegt daher die Aufgabe zugrunde, ein Flurförderzeug mit einem anhebbaren Lastaufnahmemittel, wobei der Hubbereich des Lastaufnahmemittels in mindestens zwei Bereiche unterteilt ist und in einem ersten Hubbereich (Normalhubbereich A) uneingeschränkte Hebe- und Senkfunktionen ansteuerbar sind, während in mindestens einem weiteren Hubbereich (Sonderhubbereich B) mindestens eine Hubfunktion nur mittels Betätigung mindestens eines Sonderschalters aktivierbar ist, zu schaffen, bei dem die Gefahr einer Beschädigung von Ladegut und/oder Flurförderzeug durch unvorsichtigen Einsatz, insbesondere bei besonders hohen oder besonders niedrigen Hubhöhen, deutlich verringert wird.The invention is therefore based on the object, an industrial truck with a liftable load receiving means, wherein the lifting range of the load receiving means is divided into at least two areas and in a first stroke range (Normalhubbereich A) unrestricted lifting and lowering functions are controlled, while in at least one further stroke range ( Sonderhubbereich B) at least one lifting function can be activated only by operating at least one special switch to create, in which the risk of damage to cargo and / or truck by careless Use, especially at particularly high or low lifting heights, is significantly reduced.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass in mindestens einem Sonderhubbereich die Hubgeschwindigkeit und/oder Hubbeschleunigung in mindestens einer Richtung, vorzugsweise vom Normalhubbereich weg, gegenüber der Geschwindigkeit im Normalhubbereich reduziert ist. Indem die Hubgeschwindigkeit im Sonderhubbereich reduziert ist, wird die Gefahr einer Kollision verringert.This object is achieved in that in at least one Sonderhubbereich the lifting speed and / or Hubbeschleunigung is reduced in at least one direction, preferably away from the Normalhubbereich, compared to the speed in the normal stroke. By reducing the lifting speed in the Sonderhubbereich, the risk of collision is reduced.

Indem ein Hubbereich definiert wird, in welchem eine Hubbewegung nur nach Betätigung mindestens eines Sonderschalters möglich ist, ist ein Einfahren des Lastaufnahmemittels in einen möglicherweise gefährlichen Bereich aus Unachtsamkeit nicht mehr möglich. Die Bedienperson lenkt ihre Aufmerksamkeit auf die möglicherweise gefährliche Position des Lastaufnahmemittels wodurch verhindert wird, dass die Bedienperson das Lastaufnahmemittel zu weit bewegt.By defining a stroke range in which a lifting movement is possible only after actuation of at least one special switch, retraction of the load-carrying device into a potentially dangerous area due to carelessness is no longer possible. The operator draws their attention to the potentially dangerous position of the load receiving means thereby preventing the operator to move the load handling means too far.

Zweckmäßigerweise ist mindestens ein Sonderhubbereich oberhalb des Normalhubbereichs angeordnet. Dadurch wird vermieden, dass das Lastaufnahmemittel unbeabsichtigt zu hoch angehoben wird und es zu Kollisionen mit Hindernissen oberhalb des Fahrzeuge, beispielsweise Decken, Leitungsbrücken oder Lampen kommt.Conveniently, at least one Sonderhubbereich is arranged above the Normalhubbereichs. This avoids that the load-carrying means is unintentionally raised too high and it collides with obstacles above the vehicle, such as ceilings, wire bridges or lamps.

In einer weiteren zweckmäßigen Ausgestaltung der Erfindung ist mindestens ein Sonderhubbereich unterhalb des Normalhubbereichs angeordnet. Dadurch wird vermieden, dass das Lastaufnahmemittel unbeabsichtigt zu weit abgesenkt wird und es zu Kollisionen mit am Boden befindlichen Hindernissen, wie beispielsweise Schwellen, Regalborden oder Auflagebrettern von Paletten kommt. Das Lastaufnahmemittel kann nicht aus Unaufmerksamkeit bis auf den Boden abgesenkt werden.In a further expedient embodiment of the invention, at least one Sonderhubbereich is arranged below the Normalhubbereichs. This avoids that the load-carrying means is accidentally lowered too far and it comes to collisions with obstacles located on the ground, such as thresholds, shelves or support boards of pallets. The load handler can not be lowered to the ground out of inattention.

Weiterhin ist es vorteilhaft, wenn in einem Sonderhubbereich die Hubfunktion für die Bewegung des Lastaufnahmemittels vom Sonderhubbereich zum Normalhubbereich hin ohne Betätigung des Sonderhubschalters aktivierbar ist. Dadurch ist eine Bewegung, die die Gefährdung reduziert, jederzeit in gewohnter Weise möglich.Furthermore, it is advantageous if in a Sonderhubbereich the lifting function for the movement of the load-receiving means from the Sonderhubbereich to the normal stroke range can be activated without pressing the Sonderhubschalters. As a result, a movement that reduces the risk, at any time in the usual way possible.

Vorteilhafterweise sind Mittel zur Anzeige des Hubbereichs vorgesehen. Dadurch wird eine Bedienperson darüber informiert, ob sich das Lastaufnahmemittel in einem Sonderhubbereich befindet und somit größere Aufmerksamkeit sowie die Betätigung des Sonderhubschalters nötig ist.Advantageously, means for displaying the stroke range are provided. This informs an operator whether the load-carrying means is in a special lifting area and therefore greater attention and the operation of the special stroke is necessary.

In einer besonders vorteilhaften Ausgestaltung ist als Mittel zur Anzeige des Hubbereichs eine optische Anzeige, vorzugsweise als verschiedenfarbige Anzeigelemente ausgebildet, vorgesehen. Optische Anzeigen sind einfach erfassbar, beeinträchtigen nicht die Umgebung und sind einfach herstellbar. Insbesondere verschiedenfarbige Anzeigeelemente sind eindeutig und gut mit einem Blick erfassbar.In a particularly advantageous embodiment, a visual display, preferably in the form of differently colored display elements, is provided as the means for displaying the stroke range. Optical displays are easily detectable, do not affect the environment and are easy to produce. In particular, different colored display elements are clearly and easily detectable at a glance.

Weiterhin ist es zweckmäßig, wenn Mittel zum Erkennen von Hindernissen oberhalb und/oder unterhalb des Lastaufnahmemittels vorgesehen sind. Dadurch kann ein zusätzlicher Hinweis auf das Vorhandensein einer gefährlichen Situation gegeben werden.Furthermore, it is expedient if means for detecting obstacles above and / or below the load receiving means are provided. This can be an additional indication of the presence of a dangerous situation.

Besonders vorteilhaft ist es, wenn die Größe der Hubbereiche in Abhängigkeit vom Abstand eines Hindernisses von der Aufstandsfläche des Flurförderzeugs festlegbar ist. Dadurch wird die Größe der Sonderhubbereiche an die aktuellen Gefahren angepasst. Längere Hubstrecken im Sonderhubbereich, d.h. mit gedrücktem Sonderhubschalter, bei denen die Aufmerksamkeit der Bedienperson nachlassen kann, unterbleiben. In Bereichen ohne Hindernisse ist eine einfache und produktive Handhabung des Flurförderzeugs gewährleistet.It is particularly advantageous if the size of the stroke areas can be fixed as a function of the distance of an obstacle from the footprint of the industrial truck. This adjusts the size of the special lifting areas to the current dangers. Longer stroke distances in Sonderhubbereich, i. with the special lift switch depressed, which may cause the operator's attention to lessen. In areas without obstacles, a simple and productive handling of the truck is guaranteed.

Weitere Vorteile und Einzelheiten der Erfindung werden anhand der in den schematischen Figuren dargestellten Ausführungsbeispiele näher erläutert. Dabei zeigt

Figur 1
die Seitenansicht eines erfindungsgemäßen Hochhubwagens mit einer Kennzeichnung des Normalhubbereichs und des Sonderhubbereichs sowie einer Darstellung des Lastaufnahmemittels in vier verschiedenen Hubpositionen,
Figur 2
einen Deichselkopf des erfindungsgemäßen Hochhubwagens in Draufsicht,
Figur 3
ein erfindungsgemäßes Flurförderzeug mit einer Vorrichtung zum Erkennen von Hindernissen oberhalb des Lastaufnahmemittels.
Further advantages and details of the invention will be explained in more detail with reference to the embodiments illustrated in the schematic figures. It shows
FIG. 1
the side view of a high-lift truck according to the invention with a marking of the normal stroke and the Sonderhubbereichs and a representation of the lifting device in four different stroke positions,
FIG. 2
a tiller head of the high-lift truck according to the invention in plan view,
FIG. 3
an inventive truck with a device for detecting obstacles above the lifting device.

Figur 1 zeigt schematisch einen erfindungsgemäßen Hochhubwagen 1 mit einer Kennzeichnung des Normalhubbereichs A und des Sonderhubbereichs B. Der Hochhubwagen 1 gliedert sich in einen Antriebsteil 2 und einen Lastteil 3. Im Antriebsteil 2 ist der hier nicht dargestellte Antriebsmotor für das lenkbare Antriebsrad 4 und eine ebenfalls nicht dargestellte Steuerungseinheit zur Ansteuerung der Antriebs- und Hubfunktionen untergebracht. Ebenfalls nicht dargestellt ist eine im Antriebsteil 2 angeordnete Batterie, die zur Energieversorgung des Hochhubwagens 1 dient. Gelenkt wird das Fahrzeug 1 über eine Deichsel 5, wobei am Deichelkopf 6 Bedienelemente 7 zur Steuerung der Funktionen des Flurförderzeugs 1 angebracht sind. FIG. 1 schematically shows a stacker 1 according to the invention with a marking of the normal stroke A and the Sonderhubbereichs B. The stacker 1 is divided into a drive part 2 and a load part 3. In the drive part 2 of the drive motor not shown here for the steerable drive wheel 4 and a likewise not shown control unit for controlling the drive and lifting functions is housed. Also not shown is arranged in the drive part 2 battery, which serves to power the high-lift truck 1. The vehicle 1 is steered by means of a drawbar 5, whereby operating elements 7 for controlling the functions of the industrial truck 1 are mounted on the dike head 6.

Der Lastteil 3 des Flurförderzeugs 1 umfasst ein Hubgerüst 8 an dem ein anhebbares Lastaufnahmemittel 9 geführt ist. Das Hubgerüst 8 setzt sich aus einem äußeren, feststehenden Teil, dem so genannten Standmast 10 und einem inneren Teil zusammen, der nach oben ausfahrbar ist, dem so genannten Fahrmast 11. Das Lastaufnahmemittel 9 ist gabelförmig ausgeführt und befindet sich in der Position I, in der beispielsweise Paletten oder Gitterboxen vom Boden aufgenommen werden können. Um die Last anzuheben, wird das Lastaufnahmemittel 9 über einen hier nicht dargestellten Hydraulikzylinder am Hubgerüst 8 nach oben bewegt und erreicht so schließlich die Position II. Der Fahrmast 11 bleibt bei diesem Vorgang in seiner Position. Sollen größere Hubhöhen erreicht werden, wird die Vertikalbewegung des Lastaufnahmemittels 9 durch das Ausfahren des Fahrmasts 11 erzeugt, während das Lastaufnahmemittel 9 gegenüber dem Fahrmast 11 seine Position nicht mehr ändert. Auf diese Weise wird bei Fortführung der Hubbewegung die Position III erreicht.The load part 3 of the truck 1 comprises a mast 8 on which a liftable load-receiving means 9 is guided. The mast 8 is composed of an outer, fixed part, the so-called stationary mast 10 and an inner part which can be extended upward, the so-called mast 11. The load-carrying means 9 is fork-shaped and located in the position I, in for example, pallets or lattice boxes can be picked up from the ground. To lift the load, the load-receiving means 9 is moved by a hydraulic cylinder, not shown here on the mast 8 upwards and thus finally reaches the position II. The mast 11 remains in this process in position. If greater lifting heights are to be achieved, the vertical movement of the load receiving means 9 is generated by the extension of the traveling mast 11, while the load receiving means 9 with respect to the mast 11 does not change its position. In this way, the position III is achieved in continuation of the lifting movement.

Für den im Ausführungsbeispiel gezeigten Hochhubwagen 1 ist die Position III das Ende des Normalhubbereichs A. Oberhalb davon beginnt der Sonderhubbereich B mit der maximalen Hubposition IV. Die Hubhöhe wird durch eine hier nicht dargestellte Hubhöhenmessvorrichtung nach dem Stand der Technik ermittelt.For the stacker 1 shown in the embodiment, the position III is the end of the Normalhubbereichs A. Above this, the Sonderhubbereich B starts with the maximum stroke position IV. The lifting height is determined by a not shown here Hubhöhenmessvorrichtung according to the prior art.

Gesteuert werden die Hubbewegungen über Bedienelemente 7, die am Deichselkopf 6 angebracht sind. Der Deichselkopf 6 ist in Figur 2 schematisch in Draufsicht gezeigt. Die Fahrfunktionen des Flurförderzeugs 1 werden über Flügelschalter 12 gesteuert, wie dies bei Fahrzeugen nach dem Stand der Technik bekannt ist. Ebenfalls entsprechend dem Stand der Technik sind ein Sicherheitschalter 13 sowie ein Schalter 14 zur Betätigung einer akustischen Warnvorrichtung vorhanden. Die Hubbewegungen des Flurförderzeugs 1 werden über die Schalter 15 und 16 gesteuert, wobei der Schalter 15 ein Anheben des Lastaufnahmemittels 9 bewirkt, während bei Betätigung des Schalters 16 dieses abgesenkt wird. Weiterhin ist eine Anzeigevorrichtung 17 vorhanden, die im Wesentlichen von einer grünen Leuchtdiode 18 und einer roten Leuchtdiode 19 gebildet wird.The strokes are controlled by controls 7, which are attached to the tiller head 6. The tiller head 6 is in FIG. 2 shown schematically in plan view. The driving functions of the truck 1 are controlled via wing switches 12, as is known in vehicles according to the prior art. Also according to the prior art, a safety switch 13 and a switch 14 for actuating an acoustic warning device are present. The strokes of the truck 1 are controlled by the switches 15 and 16, wherein the switch 15 causes lifting of the load-receiving means 9, while upon actuation of the switch 16 this is lowered. Furthermore, a display device 17 is present, which is essentially formed by a green light emitting diode 18 and a red light emitting diode 19.

Solange sich das Lastaufnahmemittel 9 innerhalb des Normalhubbereichs A befindet, leuchtet die grüne Leuchtdiode 18 auf und signalisiert so der Bedienperson, dass uneingeschränkte Hubfunktionen zur Verfügung stehen. Erreicht das Lastaufnahmemittel 9 das Ende des Normalhubbereichs (entsprechend Position III in Figur 1), wird das Lastaufnahmemittel 9 gestoppt. Betätigt die Bedienperson nun einen der Sonderhubschalter 20a, 20b und gleichzeitig den Hubschalter 15, bewegt sich das Lastaufnahmemittel 9 weiter nach oben. Die grüne Leuchtdiode 18 wird deaktiviert und die rote Leuchtdiode 19 leuchtet auf. Dadurch kann die Bedienperson erkennen, dass sich das Lastaufnahmemittel 9 im Sonderhubbereich B befindet. Nun kann das Lastaufnahmemittel 9 bis zur maximalen Hubposition IV, die durch den Ausfahrweg des Fahrmastes 11 vorgegeben ist, angehoben werden. Im gezeigten Ausführungsbeispiel wird gleichzeitig innerhalb des Sonderhubbereichs B die Hubgeschwindigkeit bei der Aufwärtsbewegung des Lastaufnahmemittels 9 deutlich reduziert.As long as the load-carrying means 9 is within the normal stroke range A, the green light-emitting diode 18 lights up and thus signals the operator that unrestricted lifting functions are available. If the load-carrying means 9 reaches the end of the normal lifting range (corresponding to position III in FIG FIG. 1 ), the load receiving means 9 is stopped. If the operator now actuates one of the special lifting switches 20a, 20b and at the same time the lifting switch 15, the load receiving means 9 continues to move upwards. The green LED 18 is deactivated and the red LED 19 lights up. As a result, the operator can recognize that the load-receiving means 9 is located in the special lifting area B. Now, the load-receiving means 9 can be raised to the maximum stroke position IV, which is predetermined by the extension path of the driving mast 11. In the embodiment shown, the lifting speed is significantly reduced during the upward movement of the load receiving means 9 within the Sonderhubbereichs B simultaneously.

Wird die Hubaktion unterbrochen, indem die Bedienperson einen der Schalter 15, 20a, 20b loslässt, beispielsweise um eine Last aufzunehmen, muss zur erneuten Betätigung des Aufwärtshubes wiederum einer der Sonderhubschalter 20a, 20b zusätzlich zum Hubschalter 15 gedrückt werden. Zur Betätigung der Abwärtshubfunktion genügt es, den Schalter 16 zu betätigen. Eine Betätigung eines Sonderhubschalters 20a, 20b ist in diesem Fall nicht notwendig, da sich das Lastaufnahmemittel 9 nach unten, also von einer potentiellen Gefahr weg, bewegt. Auch die Geschwindigkeit der Abwärtshubbewegung ist im Sonderhubbereich B die gleiche wie im Normalhubbereich A. Sobald bei der Abwärtsbewegung das Lastaufnahmemittel 9 wieder im Normalhubbereich A angelangt ist, wechselt die Anzeigefunktion von der roten Leuchtdiode 19 auf die grüne Leuchtdiode 18.If the lifting action is interrupted by the operator releasing one of the switches 15, 20a, 20b, for example to pick up a load, one of the special lifting switches 20a, 20b must be pressed in addition to the lifting switch 15 in order to operate the upstroke again. To actuate the Abwärtshubfunktion it is sufficient to press the switch 16. Actuation of a Sonderhubschalters 20a, 20b is not necessary in this case, since the load-receiving means 9 moves down, so away from a potential danger moves. The speed of the downward stroke movement in the Sonderhubbereich B is the same as in Normalhubbereich A. As soon as the load receiving means 9 is again reached in the normal range A in the downward movement, the display function changes from the red LED 19 to the green LED 18th

Die Festsetzung des Normalhubbereichs A erfolgt anhand des niedrigsten Hindernisses, das am Einsatzort zu erwarten ist und anhand des maximal zu erwartenden Höhenmaßes der zu befördernden Lasten, beziehungsweise, wenn dieses niedriger ist als die Distanz zwischen der Oberkante 21 einer Zinke 22 des Lastaufnahmemittels 9 und der Oberkante 23 des höchsten Mastbestandteils, anhand der Distanz der Oberkante 23 des höchsten Mastbestandteils zur Oberkante 21 der Zinke 22. Ist also beispielsweise eine minimale Deckenhöhe von 4 m gegeben und die maximale Lasthöhe liegt bei 1,5 m, so wird der Normalhubbereich bis zu einer Höhe von 2,5 m reichen.The determination of the Normalhubbereichs A is based on the lowest obstacle that can be expected at the site and the maximum expected height dimension of the loads to be transported, or if this is lower than the distance between the top 21 of a prong 22 of the lifting device 9 and the Upper edge 23 of the highest mast component, based on the distance of the upper edge Thus, if, for example, a minimum ceiling height of 4 m is given and the maximum load height is 1.5 m, then the normal lift range will extend to a height of 2.5 m.

Auch wenn im Normalhubbereich A einer der Sonderhubschalter 20a, 20b gleichzeitig mit dem Hubschalter 15 betätigt wird, stoppt das Lastaufnahmemittel 9 am Ende des Normalhubbereichs A und die Bedienperson muss erneut einen der Sonderhubschalter 20a, 20b betätigen, um in den Sonderhubbereich B einfahren zu können. Auch wenn im Sonderhubbereich B die Abwärtshubfunktion betätigt wurde und danach wieder der Aufwärtshub aktiviert werden soll, ist zusätzlich eine der Sonderhubtasten 20a, 20b zu betätigen, auch wenn diese während des Abwärtshubs gedrückt war. Dadurch wird vermieden, dass eine Bedienperson routinemäßig bei allen Hubaktionen einen der Sonderhubschalter 20a, 20b betätigt, ohne auf Hindernisse im Hubweg zu achten.Even if in Normalhubbereich A of the Sonderhubschalter 20a, 20b is operated simultaneously with the stroke switch 15, the load receiving means 9 stops at the end of the Normalhubbereichs A and the operator must again one of the Sonderhubschalter 20a, 20b press to enter the Sonderhubbereich B can. Even if in the Sonderhubbereich B the Abwärtshubfunktion has been pressed and then the upstroke is to be activated again, one of the Sonderhubtasten 20a, 20b is to be operated, even if it was pressed during the downstroke. This avoids that an operator routinely actuates one of the special stroke switches 20a, 20b during all stroke actions without paying attention to obstacles in the stroke.

In einer weiteren Ausgestaltungsform der Erfindung, die in Figur 3 gezeigt ist, ist im oberen Bereich des Masts 8 eine Radareinheit 24 angebracht, die die Distanz zu Hindernissen, die sich oberhalb des Flurförderzeugs befinden, misst. Diese Daten werden drahtlos an die hier nicht dargestellte Steuerungseinheit des Flurförderzeugs 1 übertragen, die daraufhin die Höhe, ab der der Sonderhubbereich B beginnt, festlegt. In Figur 3a ist der Fall gezeigt, bei dem auch bei maximaler Hubhöhe und einer Last 25 mit maximalen Höhenabmessungen keine Gefahr einer Kollision mit der Decke 26 besteht. In diesem Fall ist der gesamte Hubbereich als Normalhubbereich A freigegeben und das Lastaufnahmemittel 9 kann ohne Aktivierung eines Sonderhubschalters 20a, 20b über den gesamten Hubbereich bewegt werden.In a further embodiment of the invention, which in FIG. 3 is shown, a radar unit 24 is mounted in the upper part of the mast 8, which measures the distance to obstacles that are located above the truck. These data are transmitted wirelessly to the control unit of the truck 1, not shown here, which then determines the height from which the Sonderhubbereich B begins. In FIG. 3a the case is shown in which there is no danger of collision with the ceiling 26 even at maximum lifting height and a load 25 with maximum height dimensions. In this case, the entire stroke range is released as Normalhubbereich A and the load receiving means 9 can be moved without activation of a Sonderhubschalters 20a, 20b over the entire stroke range.

In Figur 3b ist eine Situation gezeigt, bei der die Höhe der Decke 27 unterhalb der maximalen Hubhöhe des Flurförderzeugs 1 liegt. In diesem Fall wird ein Sonderhubbereich B festgelegt. Der Sonderhubbereich B erstreckt sich beinahe vollständig bis zu der Höhe, in der eine Kollision mit dem Hindemis in jedem Fall durch die Oberkante 23 des Hubmastes 8 stattfindet. Eine Kollision der Last 25 ist in diesem Falle möglich, allerdings weniger wahrscheinlich als bei einem Fahrzeug nach em Stand der Technik, da die Bedienperson im Sonderfahrbereich besonders aufmerksam ist. Bei einer Last, die geringere Höhenabmessungen als die Last 25 besitzt, kann jedoch auf diese Weise der Hubbereich des Flurförderzeugs vollständig ausgenutzt werden.In FIG. 3b a situation is shown in which the height of the ceiling 27 is below the maximum lifting height of the truck 1. In this case, a Sonderhubbereich B is set. The Sonderhubbereich B extends almost completely up to the height in which a collision with the Hindemis takes place in each case by the upper edge 23 of the mast 8. A collision of the load 25 is possible in this case, but less likely than in a vehicle according to em prior art, since the operator is particularly attentive in the special driving range. However, in the case of a load having smaller height dimensions than the load 25, the lifting range of the industrial truck can be fully utilized in this way.

In Figur 3c ist der Fall gezeigt, bei dem die Höhe der Last 28 bekannt ist. Diese Information wird von der Bedienperson über Bedienelemente 29 an die Steuereinheit des Flurförderzeugs 1 übermittelt. Die Obergrenze des Sonderfahrbereichs B wird daher so festgesetzt, dass eine Kollision der Last 28 mit der Decke 30 gerade noch vermieden wird, während die Untergrenze in gleicher Weise eingestellt wird wie für eine Last 25 mit maximaler Höhe.In Figure 3c the case is shown in which the height of the load 28 is known. This information is transmitted by the operator via controls 29 to the control unit of the truck 1. The upper limit of the special driving range B is therefore set so that a collision of the load 28 with the ceiling 30 is barely avoided, while the lower limit is set in the same manner as for a load 25 of maximum height.

Die in Figur 3 gezeigte Ausführungsform erlaubt es der Bedienperson, weitgehend ohne Sorge um Kollisionen mit der Decke oder anderen Hindemissen die Hubfunktionen zu betätigen. Indem der Sicherheitsbereich möglichst klein gehalten wird, ist die Aufmerksamkeit der Bedienperson besonders groß. Bei einem zu großen Sicherheitsbereich besteht ansonsten die Gefahr, dass die Aufmerksamkeit der Bedienperson im Laufe des Befahrens wieder nachlässt.In the FIG. 3 embodiment shown allows the operator to operate the lifting functions largely without concern for collisions with the ceiling or other hindrances. By keeping the security area as small as possible, the attention of the operator is particularly large. If the security area is too large, there is otherwise the danger that the operator's attention may decrease again during the course of the journey.

Anstelle einer Hubhöhenmessvorrichtung kann auch ein beispielsweise am Hubmast angebrachter Schalter verwendet werden, der den Übergang vom Normalhubbereich zum Sonderhubbereich erkennt. Selbstverständlich sind auch Ausführungsformen denkbar, bei denen im Sonderfahrbereich die Hubfunktionen mit unverminderter Geschwindigkeit ausgeführt werden können.Instead of a Hubhöhenmessvorrichtung can also be used, for example, mounted on the mast switch that detects the transition from Normalhubbereich to Sonderhubbereich. Of course, embodiments are conceivable in which the Hubfunktionen functions can be performed with undiminished speed in the special driving range.

Es kann auch unterhalb des Normalhubbereichs ein Sonderhubbereich festgelegt werden, beispielsweise bei Flurförderzeugen, bei denen das Lastaufnahmemittel unterhalb des normalen Bodenniveaus abgesenkt werden kann oder wenn im Bodenbereich Hindernisse, wie beispielsweise Schwellen oder Absätze, vorhanden sind. Ein derartiger Bereich ist insbesondere auch vorteilhaft bei Arbeiten in Regalen oder an einer Laderampe, bei denen ein zu weites Absenken des Lastaufnahmemittels Beschädigungen am Flurförderzeug oder der Rampe beziehungsweise dem Regal verursachen kann.It can also be set below the normal stroke a Sonderhubbereich, for example, in industrial trucks, where the load-bearing means can be lowered below the normal ground level or if obstacles, such as sleepers or heels, are present in the ground area. Such a region is particularly advantageous when working in shelves or at a loading dock, where too much lowering of the load-carrying device may cause damage to the truck or the ramp or the shelf.

Auch die Anzeigevorrichtung kann sich nach Art und Anbringung von der gezeigten Ausführungsform unterscheiden, beispielsweise, indem eine akustische Wamung vorgesehen ist oder eine optische Anzeige, die durch ein Umschalten von Dauerlicht zu Blinken die Aufmerksamkeit der Bedienperson erregt.Also, the display device may differ in type and attachment of the embodiment shown, for example, by an audible warning is provided or a visual display that attracts the attention of the operator by switching from steady light to flashing.

Claims (8)

  1. Industrial truck, in particular a high-reach truck (1), a counterweight fork-lift truck or a retractable-mast truck, with a load pickup means (9), the lifting range of the load pickup means (9) being split into at least two ranges (A, B), and it being possible to drive unrestricted lifting and lowering functions in a first lifting range (normal lifting range A), while, in at least one further lifting range (special lifting range B), at least one lifting function can be activated only by means of actuation of at least one special switch (20a, 20b), characterized in that, in at least one special lifting range (B), the lifting speed and/or lifting acceleration is reduced in at least one direction, preferably away from the normal lifting range (A), with respect to the speed in the normal lifting range (A).
  2. Industrial truck according to Claim 1, characterized in that at least one special lifting range (B) is arranged above the normal lifting range (A).
  3. Industrial truck according to Claim 1 or 2, characterized in that at least one special lifting range is arranged below the normal lifting range (A).
  4. Industrial truck according to one of Claims 1 to 3, characterized in that, in a special lifting range (B), the lifting function for the movement of the load pickup means (9) from the special lifting range (B) towards the normal lifting range (A) can be activated without actuation of the special lifting switch (20a, 20b).
  5. Industrial truck according to one of Claims 1 to 4, characterized in that means (17) for displaying the lifting range (A, B) are provided.
  6. Industrial truck according to one of Claims 1 to 5, characterized in that an optical display (17), preferably in the form of multicoloured display elements (18, 19), is provided as the means (17) for displaying the lifting range.
  7. Industrial truck according to one of Claims 1 to 6, characterized in that means (24) for identifying obstacles above and/or below the load pickup means (9) are provided.
  8. Industrial truck according to one of Claims 1 to 7, characterized in that the size of the lifting ranges (A, B) can be fixed depending on the distance between an obstacle (26) and the standing area of the industrial truck.
EP05026403A 2004-12-10 2005-12-02 Floor conveyor comprising a liftable device for picking up loads Not-in-force EP1669320B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004059699A DE102004059699A1 (en) 2004-12-10 2004-12-10 Truck with a height-adjustable load-carrying device

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EP1669320A1 EP1669320A1 (en) 2006-06-14
EP1669320B1 true EP1669320B1 (en) 2009-08-26
EP1669320B2 EP1669320B2 (en) 2012-09-05

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011082273A1 (en) * 2011-09-07 2013-03-07 Jungheinrich Aktiengesellschaft Commercial vehicle with upward-sensing radar sensor
DE102014104841A1 (en) * 2014-04-04 2015-10-08 Jungheinrich Ag Truck
CN106604886B (en) 2014-09-15 2019-06-18 克朗设备公司 Fork truck with optics cargo sensing structure
DE102015117675A1 (en) * 2015-10-16 2017-05-04 Jungheinrich Aktiengesellschaft Tiller-guided industrial truck

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
US3386603A (en) * 1965-08-16 1968-06-04 Champ Corp Mast tilt safety device for lift trucks
GB1221645A (en) † 1967-06-26 1971-02-03 Lansing Bagnall Ltd Improvements in or relating to industrial trucks having a hydraulic circuit for performing a load handling operation
GB1217879A (en) † 1968-09-27 1970-12-31 Sevcon Eng Ltd Improvements in or relating to battery powered masted industrial trucks
GB1338738A (en) * 1972-03-09 1973-11-28 Crown Controls Corp Lift truck mechanisms and safety controls and lift trucks incorporating the same
US5906648A (en) * 1996-07-29 1999-05-25 Erim International, Inc. Collision avoidance system for vehicles having elevated apparatus
KR20010021568A (en) † 1997-07-09 2001-03-15 추후제출 Capacity data monitor
TW550948B (en) † 2001-07-04 2003-09-01 Leadtek Research Inc Audio/video IP camcorder
FR2836468B1 (en) * 2002-02-28 2004-10-01 Pinguely Haulotte ELEVATOR LIFT WITH IMPROVED SECURITY

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EP1669320B2 (en) 2012-09-05
DE102004059699A1 (en) 2006-06-14
DE502005007981D1 (en) 2009-10-08
ATE440800T1 (en) 2009-09-15
EP1669320A1 (en) 2006-06-14

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