EP3301067B1 - Industrial truck with a control unit having a control lever, and a method of operating such an industrial truck - Google Patents

Industrial truck with a control unit having a control lever, and a method of operating such an industrial truck Download PDF

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Publication number
EP3301067B1
EP3301067B1 EP17193233.8A EP17193233A EP3301067B1 EP 3301067 B1 EP3301067 B1 EP 3301067B1 EP 17193233 A EP17193233 A EP 17193233A EP 3301067 B1 EP3301067 B1 EP 3301067B1
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EP
European Patent Office
Prior art keywords
deflection
operating
operating lever
industrial truck
force
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Active
Application number
EP17193233.8A
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German (de)
French (fr)
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EP3301067A1 (en
Inventor
Hendrik Geilsdorf Dr.
Jörn Sellentin
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Jungheinrich AG
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Jungheinrich AG
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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G5/00—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member
    • G05G5/05—Means for returning or tending to return controlling members to an inoperative or neutral position, e.g. by providing return springs or resilient end-stops
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G5/00—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member
    • G05G5/03—Means for enhancing the operator's awareness of arrival of the controlling member at a command or datum position; Providing feel, e.g. means for creating a counterforce
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G5/00—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member
    • G05G5/04—Stops for limiting movement of members, e.g. adjustable stop
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G9/00—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously
    • G05G9/02—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only
    • G05G9/04—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously
    • G05G9/047—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously the controlling member being movable by hand about orthogonal axes, e.g. joysticks
    • 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
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G9/00—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously
    • G05G9/02—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only
    • G05G9/04—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously
    • G05G9/047—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously the controlling member being movable by hand about orthogonal axes, e.g. joysticks
    • G05G2009/04766—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously the controlling member being movable by hand about orthogonal axes, e.g. joysticks providing feel, e.g. indexing means, means to create counterforce

Definitions

  • the present invention relates to an industrial truck with an operating lever having an operating means and a method for operating such a material handling gs.
  • an operating element for an industrial truck with two operating levers and at least one switch arranged between them is known.
  • the operating levers are each designed for a two-axis movement and spatially spaced from each other such that for a positioned between the levers hand with the fingers, the operating lever without grasping and the at least one switch between the control levers is actuated.
  • a control device for an industrial truck which has a movable control element, in particular an operating lever and a, the deflection of the operating lever detecting and electrical control signals generating signal device.
  • a movable control element in particular an operating lever and a
  • the deflection of the operating lever detecting and electrical control signals generating signal device For an ergonomic operation of the truck is provided to form an operating range of the operating element between its neutral position and the stop point as an analog control area and immediately adjacent to the stop point to provide a switch area.
  • Out FR 2 890 464 For example, there has been known a control lever to which a connection plate for a support surface is attached, which is in contact with a support zone of a housing, and another support surface which is in contact with the lever via elastic support units which exert a holding force.
  • the first support surface may have two contact ramps, which interact during the displacement of the lever with a projection of the zone successively.
  • the invention has for its object to provide a truck and a method for its operation, which allows the simplest possible means an intuitive and reliable operation.
  • the truck according to the invention is equipped with an operating means, which has an operating lever. Further, cooperating with the operating lever reset device is provided, which generates a restoring force for the operating lever, depending on the deflection.
  • a rest area is provided for the restoring device, in which the restoring force is reduced in a falling flank by a first latching force and increased in a rising flank by a second latching force.
  • the latching area results from the course of the restoring force, depending on the deflection in comparison to a substantially proportional course. With a proportional curve, the restoring force increases with increasing deflection. With a detent range for the deflection, the restoring force is increased in relation to this proportionality.
  • first and second latching force are equal.
  • the operating means is equipped with a state switch.
  • the status switch can be switched by overcoming the locking range.
  • the status switch can be used to define whether it is overcome with increasing or decreasing deflection. Depending on the direction of the deflection movement can be switched to another state for the truck.
  • the operating means has a state switch which is switched by holding the operating lever in its latching area.
  • a state switch a corresponding state is not switched by passing through the latching area and overcoming an additional latching force, but in that the operating lever is held in the latching area.
  • the state switch is used to switch between different vehicle functions or operating modes for a vehicle function.
  • the operating modes may indicate a different mode of operation of the same vehicle function.
  • a first deflection region is provided with deflections smaller than the deflection of the latching region. This means that, starting from a neutral position, there is a range of the deflection before the latching area is reached with increasing deflection.
  • a second deflection region with a deflection greater than the deflection of the latching region is provided.
  • a deflection area after passing through the latching area be provided.
  • the latching point can also be provided at a mean deflection, so that both a first and a second deflection region are provided.
  • only a first or a second deflection range is provided, with an additional vehicle function being controlled as long as the deflection of the operating lever is located in the latching region.
  • the latching area is at the beginning or at the end of the deflection of the operating lever.
  • only a first or a second deflection region is provided, and an additional vehicle function or an operating mode is switched by driving through the latching region once or several times.
  • the additional vehicle function or the operating mode is executed for a predetermined time, regardless of a deflection of the operating lever.
  • the control lever has in this embodiment, no task in the execution of the additional vehicle function, but the additional vehicle function or the operating mode is switched and executed, for example, for a predetermined time.
  • the additional vehicle function or the operating mode is executed for a predetermined time, depending on a deflection of the operating lever.
  • a first and a second deflection region can be provided, wherein the additional vehicle function or the operating mode is controlled as long as the deflection of the control lever is in the latching region located.
  • the centrally arranged latching area separates a first and a second deflection area, wherein switching is made by holding the control lever in the latching area and an additional vehicle function or an operating mode is controlled as long as the deflection of the control lever is in the latching area.
  • an additional vehicle function or an operating mode is switched by a single or repeated passing through of the latching region, which is executed independently of a deflection of the operating lever for a predetermined time.
  • the additional vehicle function or the operating mode is ended by a renewed driving through the latching area. This may be provided as a form of emergency stop.
  • the method is switched by overcoming the additional latching force or by holding the deflection in the latching area.
  • By switching an additional vehicle function can be started or switched to another operating mode. It is preferably provided to end a switched vehicle function or an operating mode by again overcoming the latching force.
  • Fig. 1 shows an operating means 10 having an operating lever 12.
  • the operating lever 12 has a lever head 14 which is formed crowned for ergonomic handling.
  • the operating lever 12 is pivotable with its lever head 14 relative to a base frame 18 in two axes K independently.
  • an elastic sleeve 16 is provided, which protects the lever foot of the operating lever 12 from contamination.
  • control lever With the control lever two deflections can be operated in positive and in negative direction.
  • the movements in both perpendicular directions can be carried out independently of each other and superimposed in this way.
  • the invention can already be carried out with a control lever with a one-dimensional deflection in a positive or negative direction.
  • FIG. 2 shows a model representation of the behavior of the operating lever in the catch area.
  • the operating lever To deflect the operating lever, it is moved in the X direction against a spring K 1 . With increasing deflection in the X direction, the spring force increases proportionally.
  • a second spring K 2 is provided, at the lower end schematically a wheel R is shown. The wheel R rolls on the ground, so that the spring K 2 on a level surface no contribution to the restoring force or to the counteracting force F.
  • the rest area is characterized by a depression in the ground. In this depression of the ground, the spring K 2 expands and delivers due to the slope of a spring force K 1 counteracting force. The sum of the forces is perceived as a decreasing restoring force.
  • the wheel R moves out of the recess, there arises a spring force K 1 energizing force component of the spring K 2 and hence increasing restoring force. Passing through the depression in the ground thus creates for the user the feeling that a detent point is being passed through. This operating sensation occurs both when the depression is driven through to smaller deflections towards a smaller extent of the force K 1 , as is the case when the depression is driven through to smaller deflections due to larger deflections.
  • Fig. 3 shows the course of a restoring force, depending on the deflection of the control lever in arbitrarily scaled units.
  • the units are scaled so that at a maximum deflection of 100%, the intended maximum restoring force of 100% is applied.
  • the in Fig. 3 illustrated Relationship between deflection and restoring force has a lower proportionality range for a displacement of 0% to 40% and an upper proportionality range for a displacement of 60% to 100%.
  • the deflection force drops with an excursion of approximately 45%, despite increasing deflection.
  • This is followed by a steeply increasing restoring force, which decreases again at about 55% deflection in a falling flank with increasing deflection to move into the upper range of proportionality.
  • lower and upper proportionality regions have an approximately equal slope. This is not necessary. It can also be provided that the proportionality regions have a different slope.
  • the latching region 20 also has two falling flanks 22 and 24, in which the restoring force decreases with increasing deflection. Due to the falling flanks 20 and 22, the additional to be overcome latching force .DELTA.R is more noticeable. Between the falling flanks 22, 24 is a rising edge 25, in which the restoring force increases disproportionately with the deflection. By reversing the falling or increasing restoring force, the flank 25 can be perceived as a latching region, as both the rising and the decreasing deflection in the latching region with the falling flanks 22, 24 are reversed.
  • the semi-automatic function is triggered via the operating lever.
  • the Hubtownnvorians it is known, for example, that the Hubtownnvor Vietnamese is triggered by a slight withdrawal of the operating lever in the vicinity of the approaching lifting height. The vehicle recognizes the slight retraction of the operating lever and then moves independently to the preselected lifting height.
  • locking points according to the invention can be switched by driving through or holding the operating lever in the latching area.
  • the additional latching force .DELTA.R is used as a switch, is then switched in the downstream switching range in its passage.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Control Devices (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Description

Die vorliegende Erfindung betrifft ein Flurförderzeug mit einem einen Bedienhebel aufweisenden Bedienmittel sowie ein Verfahren zur Bedienung eines solchen Flurförderzeu gs.The present invention relates to an industrial truck with an operating lever having an operating means and a method for operating such a material handling gs.

Für die Bedienung und Steuerung von Flurförderzeugen sind zahlreiche unterschiedliche Konzepte und Ansätze für Bedienelemente bekannt. Aus DE 10 2013 012 176 ist beispielsweise ein Bedienelement für ein Flurförderzeug mit zwei Bedienhebeln und mindestens einem zwischen diesen angeordneten Schalter bekannt. Die Bedienhebel sind jeweils für eine zweiachsige Bewegung ausgebildet und derart räumlich voneinander beabstandet, dass für eine zwischen den Hebeln positionierte Hand mit den Fingern die Bedienhebel ohne Umgreifen und der mindestens eine Schalter zwischen den Bedienhebeln betätigbar ist.Numerous different concepts and approaches for operating elements are known for the operation and control of industrial trucks. Out DE 10 2013 012 176 For example, an operating element for an industrial truck with two operating levers and at least one switch arranged between them is known. The operating levers are each designed for a two-axis movement and spatially spaced from each other such that for a positioned between the levers hand with the fingers, the operating lever without grasping and the at least one switch between the control levers is actuated.

Aus DE 10 2005 000 633 A1 ist bekannt geworden, zur Rückmeldung von Fahrzeugzuständen und/oder Fahrzeuginformationen, Erschütterungen an dem Bedienelement und/oder an dem Fahrerarbeitssitz vorzusehen. Es erfolgt hierbei eine haptische Rückmeldung von Fahrzeugzuständen und/oder Fahrzeuginformationen. Bei der Ausgestaltung des Bedienelements als Joystick erfolgt eine sichere und direkte Rückmeldung von Fahrzeugzuständen und/oder Fahrzeuginformationen über einen Vibrationen erzeugenden Elektromagneten oder einen mit einer Unwucht in Wirkverbindung stehenden Elektromotor.Out DE 10 2005 000 633 A1 It has become known, for the feedback of vehicle states and / or vehicle information, to provide vibrations on the operating element and / or on the driver's work seat. In this case, there is a haptic feedback of vehicle states and / or vehicle information. In the embodiment of the control element as a joystick, there is a safe and direct feedback of vehicle states and / or vehicle information via a vibration-generating electromagnet or an electric motor operatively connected to an imbalance.

Aus DE 10 2014 103 988 A1 sind als Joystick ausgebildete Bedienelemente zur Steuerung von Nutzfahrzeugen, Maschinen, Arbeitsfunktionen von Nutzfahrzeugen oder Baumaschinen und Anbaugeräten bekannt. Für die Joysticks ist auch der Einsatz von Force-Feedback bekannt. Bei Force-Feedback handelt es sich um eine mechanische Rückkopplung, was üblicherweise durch ein gekoppeltes Drehmoment eines Elektromotors mit Hilfe eines Getriebes erreicht wird. Für die Umsetzung von Force-Feedback sind unterschiedliche technische Ausgestaltungen für den Betätigungshebel des Joysticks bekannt.Out DE 10 2014 103 988 A1 are designed as joystick controls for the control of commercial vehicles, machinery, work functions of commercial vehicles or construction machinery and attachments known. The use of force feedback is also known for the joysticks. Force feedback is one mechanical feedback, which is usually achieved by a coupled torque of an electric motor by means of a transmission. For the implementation of force feedback different technical designs for the operating lever of the joystick are known.

Aus DE 10 2011 103 214 A1 ist ein Steuerorgan für ein Flurförderzeug bekannt geworden, das ein bewegbares Bedienelement, insbesondere ein Bedienhebel und eine, die Auslenkung des Bedienhebels erfassende und elektrische Steuersignale erzeugende Signaleinrichtung aufweist. Für eine ergonomische Bedienung des Flurförderzeugs ist vorgesehen, einen Betätigungsbereich des Bedienelements zwischen seiner Neutralstellung und dem Anschlagpunkt als analoger Steuerbereich auszubilden und unmittelbar angrenzend an den Anschlagpunkt einen Schalterbereich vorzusehen.Out DE 10 2011 103 214 A1 a control device for an industrial truck has become known, which has a movable control element, in particular an operating lever and a, the deflection of the operating lever detecting and electrical control signals generating signal device. For an ergonomic operation of the truck is provided to form an operating range of the operating element between its neutral position and the stop point as an analog control area and immediately adjacent to the stop point to provide a switch area.

Aus FR 2 890 464 ist ein Steuerhebel bekannt geworden, an dem eine Verbindungsplatte für eine Stützfläche angebracht ist, die mit einer Stützzone eines Gehäuses in Kontakt steht, und eine andere Stützfläche, die mit dem Hebel über elastische Halteeinheiten in Kontakt ist, die eine Haltekraft ausüben. Die erste Stützfläche kann zwei Kontaktrampen aufweisen, die während des Verschiebens des Hebels mit einem Vorsprung der Zone nacheinander zusammenwirken.Out FR 2 890 464 For example, there has been known a control lever to which a connection plate for a support surface is attached, which is in contact with a support zone of a housing, and another support surface which is in contact with the lever via elastic support units which exert a holding force. The first support surface may have two contact ramps, which interact during the displacement of the lever with a projection of the zone successively.

Der Erfindung liegt die Aufgabe zugrunde, ein Flurförderzeug sowie ein Verfahren zu dessen Bedienung bereitzustellen, das mit möglichst einfachen Mitteln eine intuitive und zuverlässige Bedienung gestattet.The invention has for its object to provide a truck and a method for its operation, which allows the simplest possible means an intuitive and reliable operation.

Erfindungsgemäß wird die Aufgabe durch ein Flurförderzeug mit den Merkmalen aus Anspruch 1 gelöst, ebenso wie durch ein Verfahren mit den Merkmalen aus Anspruch 15. Vorteilhafte Ausgestaltungen bilden den Gegenstand der Unteransprüche.According to the invention the object is achieved by an industrial truck with the features of claim 1, as well as by a method having the features of claim 15. Advantageous embodiments form the subject of the dependent claims.

Das erfindungsgemäße Flurförderzeug ist mit einem Bedienmittel ausgestattet, das einen Bedienhebel aufweist. Ferner ist eine mit dem Bedienhebel zusammenwirkende Rückstelleinrichtung vorgesehen, die für den Bedienhebel eine Rückstellkraft, abhängig von dessen Auslenkung, erzeugt. Erfindungsgemäß ist für die Rückstelleinrichtung ein Rastbereich vorgesehen, in dem die Rückstellkraft in einer fallenden Flanke um eine erste Rastkraft vermindert und in einer steigenden Flanke um eine zweite Rastkraft erhöht wird. Der Rastbereich ergibt sich aus dem Verlauf der Rückstellkraft, abhängig von der Auslenkung im Vergleich zu einem im Wesentlichen proportionalen Verlauf. Bei einem proportionalen Verlauf nimmt die Rückstellkraft mit zunehmender Auslenkung zu. Bei einem Rastbereich für die Auslenkung ist die Rückstellkraft gegenüber dieser Proportionalität erhöht. In dem Rastbereich ist ein Kraftverlauf vorgesehen, bei dem in einer fallenden Flanke die rückstellende Kraft mit zunehmender Auslenkung abnimmt, bevor sie in einer steigenden Flanke mit weiter zunehmender Auslenkung wieder ansteigt. Hierdurch wird bei dem Benutzer des Bedienhebels ein Gefühl eines durchlaufenden Rastpunktes erzeugt. In dem Rastpunkt herrscht eine Rückstellkraft, jedoch erhöht sich die Rückstellkraft überproportional, wenn der Bedienhebel aus dem Rastpunkt herausbewegt wird. Das Einstellen und die Vorgabe der Rückstellkräfte erfolgt bei dem erfindungsgemäßen Fahrzeug über die Rückstelleinrichtung. Bevorzugt sind erste und zweite Rastkraft gleich groß.The truck according to the invention is equipped with an operating means, which has an operating lever. Further, cooperating with the operating lever reset device is provided, which generates a restoring force for the operating lever, depending on the deflection. According to the invention, a rest area is provided for the restoring device, in which the restoring force is reduced in a falling flank by a first latching force and increased in a rising flank by a second latching force. The latching area results from the course of the restoring force, depending on the deflection in comparison to a substantially proportional course. With a proportional curve, the restoring force increases with increasing deflection. With a detent range for the deflection, the restoring force is increased in relation to this proportionality. In the latching area, a force curve is provided in which the restoring force decreases with increasing deflection in a falling flank, before it rises again in a rising flank with further increasing deflection. As a result, a feeling of a continuous locking point is generated by the user of the operating lever. In the resting point there is a restoring force, but increased the restoring force disproportionately when the operating lever is moved out of the detent point. The setting and the specification of the restoring forces takes place in the vehicle according to the invention via the restoring device. Preferably, first and second latching force are equal.

In einer bevorzugten Weiterbildung ist das Bedienmittel mit einem Zustands schalter ausgestattet. Der Zustands schalter kann durch Überwinden des Rastbereichs geschaltet werden. Bei dem Zustandsschalter kann definiert werden, ob dieser mit steigender oder mit fallender Auslenkung überwunden wird. Je nach Richtung der Auslenkbewegung kann in einen anderen Zustand für das Flurförderzeug geschaltet werden.In a preferred embodiment, the operating means is equipped with a state switch. The status switch can be switched by overcoming the locking range. The status switch can be used to define whether it is overcome with increasing or decreasing deflection. Depending on the direction of the deflection movement can be switched to another state for the truck.

In einer weiteren bevorzugten Ausgestaltung der Erfindung besitzt das Bedienmittel einen Zustandsschalter, der durch Halten des Bedienhebels in seinem Rastbereich geschaltet wird. Bei diesem Zustandsschalter wird ein entsprechender Zustand nicht durch Durchfahren des Rastbereichs und Überwinden einer zusätzlichen Rastkraft geschaltet, sondern dadurch, dass der Bedienhebel im Rastbereich gehalten wird. Bevorzugt wird mit Hilfe des Zustandsschalters zwischen verschiedenen Fahrzeugfunktionen oder Betriebsmodi für eine Fahrzeugfunktion umgeschaltet. Die Betriebsmodi können eine unterschiedliche Betriebsart ein und derselben Fahrzeugfunktion bezeichnen.In a further preferred embodiment of the invention, the operating means has a state switch which is switched by holding the operating lever in its latching area. In this state switch, a corresponding state is not switched by passing through the latching area and overcoming an additional latching force, but in that the operating lever is held in the latching area. Preferably, the state switch is used to switch between different vehicle functions or operating modes for a vehicle function. The operating modes may indicate a different mode of operation of the same vehicle function.

In einer bevorzugten Ausgestaltung ist ein erster Auslenkungsbereich mit Auslenkungen kleiner als die Auslenkung des Rastbereichs vorgesehen. Dies bedeutet, es gibt, ausgehend von einer Neutralstellung, einen Bereich der Auslenkung, bevor der Rastbereich bei zunehmender Auslenkung erreicht wird.In a preferred embodiment, a first deflection region is provided with deflections smaller than the deflection of the latching region. This means that, starting from a neutral position, there is a range of the deflection before the latching area is reached with increasing deflection.

In einer bevorzugten Weiterbildung ist ein zweiter Auslenkungsbereich mit einer Auslenkung größer als die Auslenkung des Rastbereichs vorgesehen. Bei dieser Weiterbildung kann ein Auslenkungsbereich nach Durchlaufen des Rastbereichs vorgesehen sein. Der Rastpunkt kann für eine Kombination des ersten und des zweiten Auslenkungsbereichs selbstverständlich auch bei einer mittleren Auslenkung vorgesehen sein, so dass sowohl ein erster als auch ein zweiter Auslenkungsbereich vorgesehen ist.In a preferred refinement, a second deflection region with a deflection greater than the deflection of the latching region is provided. In this development, a deflection area after passing through the latching area be provided. Of course, for a combination of the first and second deflection regions, the latching point can also be provided at a mean deflection, so that both a first and a second deflection region are provided.

In einer bevorzugten Ausgestaltung ist nur ein erster oder ein zweiter Auslenkungsbereich vorgesehen, wobei eine zusätzliche Fahrzeugfunktion solange angesteuert wird, wie die Auslenkung des Bedienhebels sich in dem Rastbereich befindet. Bei dieser Ausgestaltung befindet sich der Rastbereich am Anfang oder am Ende der Auslenkung des Bedienhebels. Durch Halten des Bedienhebels in dem Rastbereich wird eine zusätzliche Fahrzeugfunktion oder ein Bedienmodus geschaltet.In a preferred embodiment, only a first or a second deflection range is provided, with an additional vehicle function being controlled as long as the deflection of the operating lever is located in the latching region. In this embodiment, the latching area is at the beginning or at the end of the deflection of the operating lever. By holding the operating lever in the latching area, an additional vehicle function or an operating mode is switched.

In einer weiteren bevorzugten Ausgestaltung ist nur ein erster oder ein zweiter Auslenkungsbereich vorgesehen und durch ein ein- oder mehrmaliges Durchfahren des Rastbereichs wird eine zusätzliche Fahrzeugfunktion oder ein Bedienmodus geschaltet. Hier ist vorgesehen, dass die zusätzliche Fahrzeugfunktion oder der Bedienmodus für eine vorbestimmte Zeit ausgeführt wird, unabhängig von einer Auslenkung des Bedienhebels. Der Bedienhebel besitzt in dieser Ausgestaltung keine Aufgabe bei der Ausführung der zusätzlichen Fahrzeugfunktion, sondern die zusätzliche Fahrzeugfunktion oder der Bedienmodus wird beispielsweise für eine vorbestimmte Zeit geschaltet und ausgeführt.In a further preferred refinement, only a first or a second deflection region is provided, and an additional vehicle function or an operating mode is switched by driving through the latching region once or several times. Here it is provided that the additional vehicle function or the operating mode is executed for a predetermined time, regardless of a deflection of the operating lever. The control lever has in this embodiment, no task in the execution of the additional vehicle function, but the additional vehicle function or the operating mode is switched and executed, for example, for a predetermined time.

In einer alternativen Ausgestaltung ist es möglich, dass die zusätzliche Fahrzeugfunktion oder der Bedienmodus für eine vorbestimmte Zeit ausgeführt wird, abhängig von einer Auslenkung des Bedienhebels.In an alternative embodiment, it is possible that the additional vehicle function or the operating mode is executed for a predetermined time, depending on a deflection of the operating lever.

In einer weiteren Ausgestaltung kann ein erster und ein zweiter Auslenkungsbereich vorgesehen sein, wobei die zusätzliche Fahrzeugfunktion oder der Betriebsmodus solange angesteuert wird, wie die Auslenkung des Bedienhebels sich im Rastbereich befindet. Der mittig angeordnete Rastbereich trennt einen ersten und einen zweiten Auslenkungsbereich, wobei durch Halten des Bedienhebels in dem Rastbereich geschaltet und eine zusätzliche Fahrzeugfunktion oder ein Betriebsmodus solange angesteuert wird, wie die Auslenkung des Bedienhebels sich in dem Rastbereich befindet.In a further embodiment, a first and a second deflection region can be provided, wherein the additional vehicle function or the operating mode is controlled as long as the deflection of the control lever is in the latching region located. The centrally arranged latching area separates a first and a second deflection area, wherein switching is made by holding the control lever in the latching area and an additional vehicle function or an operating mode is controlled as long as the deflection of the control lever is in the latching area.

In einer weiteren Ausgestaltung mit erstem und zweitem Auslenkungsbereich kann vorgesehen sein, dass durch ein ein- oder mehrmaliges Durchfahren des Rastbereichs eine zusätzliche Fahrzeugfunktion oder ein Betriebsmodus geschaltet wird, der unabhängig von einer Auslenkung des Bedienhebels für eine vorbestimmte Zeit ausgeführt wird. Alternativ ist es auch möglich, die Ausführung der zusätzlichen Fahrzeugfunktion oder des Betriebsmodus abhängig von der Auslenkung des Bedienhebels durchzuführen.In a further refinement with first and second deflection regions, it can be provided that an additional vehicle function or an operating mode is switched by a single or repeated passing through of the latching region, which is executed independently of a deflection of the operating lever for a predetermined time. Alternatively, it is also possible to carry out the execution of the additional vehicle function or the operating mode depending on the deflection of the operating lever.

In einer bevorzugten Ausgestaltung des Verfahrens ist vorgesehen, dass durch ein erneutes Durchfahren des Rastbereichs die zusätzliche Fahrzeugfunktion oder der Betriebsmodus beendet wird. Dies kann als eine Form eines Notstopps vorgesehen sein.In a preferred embodiment of the method, it is provided that the additional vehicle function or the operating mode is ended by a renewed driving through the latching area. This may be provided as a form of emergency stop.

Die erfindungsgemäße Aufgabe wird ebenfalls durch ein Verfahren zur Bedienung eines Flurförderzeugs gelöst. Ein erfindungsgemäßes Verfahren bildet den Gegenstand des Anspruchs 15.The object of the invention is also achieved by a method for operating an industrial truck. A method according to the invention forms the subject of claim 15.

Das erfindungsgemäße Verfahren dient zur Bedienung eines Flurförderzeugs mit einem einen Bedienhebel aufweisenden Bedienmittel und einer mit dem Bedienhebel zusammenwirkenden Rückstelleinrichtung, die für den Bedienhebel eine Rückstellkraft abhängig von dessen Auslenkung erzeugt. Erfindungsgemäß ist für den Bedienhebel ein Rastbereich für seine Auslenkung vorgesehen, in dem die Rückstellkraft um eine zusätzliche Rückstellkraft erhöht ist.The inventive method is used to operate an industrial truck with an operating lever having an operating means and a cooperating with the operating lever return device, which generates a restoring force depending on the deflection of the operating lever. According to the invention, a latching area for its deflection is provided for the operating lever, in which the restoring force is increased by an additional restoring force.

In einer bevorzugten Weiterbildung des Verfahrens wird durch Überwinden der zusätzlichen Rastkraft oder durch Halten der Auslenkung in dem Rastbereich geschaltet. Durch das Schalten kann eine zusätzliche Fahrzeugfunktion gestartet oder in einen anderen Betriebsmodus umgeschaltet werden. Bevorzugt ist vorgesehen, durch ein erneutes Überwinden der Rastkraft eine geschaltete Fahrzeugfunktion oder einen Betriebsmodus zu beenden.In a preferred embodiment of the method is switched by overcoming the additional latching force or by holding the deflection in the latching area. By switching an additional vehicle function can be started or switched to another operating mode. It is preferably provided to end a switched vehicle function or an operating mode by again overcoming the latching force.

Die Erfindung wird nachfolgend an einem bevorzugten Ausführungsbeispiel näher erläutert. Es zeigen:

Fig. 1
in einer schematischen Ansicht einen für den Einsatz bei einem Flurförderzeug vorgesehenen Bedienhebel,
Fig. 2
modellhafte Darstellung eines Rastbereichs,
Fig. 3
den Verlauf der Rückstellkraft, abhängig von der Auslenkung des Bedienhebels bei einem mittigen Rastbereich und
Fig. 4
den Verlauf der rückstellenden Kraft, abhängig von der Auslenkung bei einem endseitigen Rastbereich.
The invention will be explained in more detail in a preferred embodiment. Show it:
Fig. 1
in a schematic view of an intended for use in a truck control lever,
Fig. 2
model representation of a resting area,
Fig. 3
the course of the restoring force, depending on the deflection of the operating lever at a central locking area and
Fig. 4
the course of the restoring force, depending on the deflection at an end rest area.

Fig. 1 zeigt ein Bedienmittel 10, das einen Bedienhebel 12 aufweist. Der Bedienhebel 12 besitzt einen Hebelkopf 14, der ballig für eine ergonomisch günstige Handhabung ausgebildet ist. Der Bedienhebel 12 ist mit seinem Hebelkopf 14 gegenüber einem Grundrahmen 18 in zwei Achsen K unabhängig voneinander verschwenkbar. An einem Fuß des Bedienhebels 12 ist eine elastische Manschette 16 vorgesehen, die den Hebelfuß des Bedienhebels 12 vor Verunreinigungen schützt. Fig. 1 shows an operating means 10 having an operating lever 12. The operating lever 12 has a lever head 14 which is formed crowned for ergonomic handling. The operating lever 12 is pivotable with its lever head 14 relative to a base frame 18 in two axes K independently. At one foot of the operating lever 12, an elastic sleeve 16 is provided, which protects the lever foot of the operating lever 12 from contamination.

Mit dem Bedienhebel können zwei Auslenkungen in positiver und in negativer Richtung bedient werden. Die Bewegungen in beiden senkrecht zueinander stehenden Richtungen können unabhängig voneinander ausgeführt und auf diese Weise überlagert werden. Die Erfindung kann bereits bei einem Bedienhebel mit einer eindimensionalen Auslenkung in positive oder negative Richtung ausgeführt werden.With the control lever two deflections can be operated in positive and in negative direction. The movements in both perpendicular directions can be carried out independently of each other and superimposed in this way. The invention can already be carried out with a control lever with a one-dimensional deflection in a positive or negative direction.

Figur 2 zeigt eine modellhafte Darstellung für das Verhalten des Bedienhebels im Rastbereich. Zur Auslenkung des Bedienhebels wird dieser in X-Richtung gegen eine Feder K1 bewegt. Mit zunehmender Auslenkung in X-Richtung nimmt die Federkraft proportional zu. Zusätzlich ist eine zweite Feder K2 vorgesehen, an deren unterem Ende schematisch ein Rad R dargestellt ist. Das Rad R rollt auf dem Untergrund ab, sodass die Feder K2 auf einem ebenen Untergrund keinen Beitrag zur Rückstellenden Kraft oder zu der dieser entgegenwirkenden Kraft F leistet. Der Rastbereich ist gekennzeichnet durch eine Vertiefung im Untergrund. In dieser Vertiefung des Untergrunds dehnt die Feder K2 sich aus und liefert aufgrund der Schräge eine der Federkraft K1 entgegenwirkende Kraft. Die Summe der Kräfte wird als eine abnehmende rückstellende Kraft empfunden. Bewegt sich das Rad R aus der Vertiefung heraus, so entsteht eine die Federkraft K1 verstärkende Kraftkomponente der Feder K2 und somit eine zunehmende Rückstellkraft. Das Durchfahren der Vertiefung im Untergrund erzeugt beim Benutzer also das Gefühl, dass ein Rastpunkt durchfahren wird. Dieses Bediengefühl tritt sowohl auf, wenn von kleinerer Ausdehnung der Kraft K1 die Vertiefung zu größeren Auslenkungen hin durchfahren wird, wie auch wenn von größeren Auslenkungen kommend die Vertiefung zu kleineren Auslenkungen hin durchfahren wird. FIG. 2 shows a model representation of the behavior of the operating lever in the catch area. To deflect the operating lever, it is moved in the X direction against a spring K 1 . With increasing deflection in the X direction, the spring force increases proportionally. In addition, a second spring K 2 is provided, at the lower end schematically a wheel R is shown. The wheel R rolls on the ground, so that the spring K 2 on a level surface no contribution to the restoring force or to the counteracting force F. The rest area is characterized by a depression in the ground. In this depression of the ground, the spring K 2 expands and delivers due to the slope of a spring force K 1 counteracting force. The sum of the forces is perceived as a decreasing restoring force. The wheel R moves out of the recess, there arises a spring force K 1 energizing force component of the spring K 2 and hence increasing restoring force. Passing through the depression in the ground thus creates for the user the feeling that a detent point is being passed through. This operating sensation occurs both when the depression is driven through to smaller deflections towards a smaller extent of the force K 1 , as is the case when the depression is driven through to smaller deflections due to larger deflections.

Fig. 3 zeigt den Verlauf einer rückstellenden Kraft, abhängig von der Auslenkung des Bedienhebels in willkürlich skalierten Einheiten. Hierbei sind die Einheiten so skaliert, dass bei einer maximalen Auslenkung von 100 % auch die vorgesehene maximale Rückstellkraft von 100 % aufgebracht wird. Der in Fig. 3 dargestellte Zusammenhang zwischen Auslenkung und Rückstellkraft besitzt einen unteren Proportionalitätsbereich für eine Auslenkung von 0 % bis 40 % und einen oberen Proportionalitätsbereich für eine Auslenkung von 60 % bis 100 %. In dem Bereich der Auslenkung von 40 % bis 60 % fällt bei einer Auslenkung von ungefähr 45 % die Rückstellkraft trotz zunehmender Auslenkung ab. Daran schließt sich eine steil zunehmende Rückstellkraft an, die bei ungefähr 55 % Auslenkung wieder in einer fallenden Flanke mit zunehmender Auslenkung abnimmt, um in den oberen Proportionalitätsbereich überzugehen. In dem dargestellten Ausführungsbeispiel besitzen unterer und oberer Proportionalitätsbereich eine annähernd gleiche Steigung. Dies ist nicht notwendig. Es kann auch vorgesehen sein, dass die Proportionalitätsbereiche eine unterschiedliche Steigung besitzen. Im Rastbereich 20 liegt eine zu überwindende zusätzliche Rückstellkraft ΔR vor. Der Rastbereich 20 besitzt zudem zwei fallende Flanken 22 und 24, in denen mit zunehmender Auslenkung die rückstellende Kraft abnimmt. Durch die fallenden Flanken 20 und 22 ist die zusätzlich zu überwindende Rastkraft ΔR deutlicher spürbar. Zwischen den fallenden Flanken 22, 24 liegt eine steigende Flanke 25, bei der die Rückstellkraft mit der Auslenkung überproportional zunimmt. Indem sowohl bei zunehmender, als auch bei abnehmender Auslenkung im Rastbereich mit den fallenden Flanken 22, 24 zunächst eine Umkehr der fallenden bzw. steigenden Rückstellkraft erzeugt wird, kann die Flanke 25 als Rastbereich wahrgenommen werden. Fig. 3 shows the course of a restoring force, depending on the deflection of the control lever in arbitrarily scaled units. In this case, the units are scaled so that at a maximum deflection of 100%, the intended maximum restoring force of 100% is applied. The in Fig. 3 illustrated Relationship between deflection and restoring force has a lower proportionality range for a displacement of 0% to 40% and an upper proportionality range for a displacement of 60% to 100%. In the region of the deflection of 40% to 60%, the deflection force drops with an excursion of approximately 45%, despite increasing deflection. This is followed by a steeply increasing restoring force, which decreases again at about 55% deflection in a falling flank with increasing deflection to move into the upper range of proportionality. In the illustrated embodiment, lower and upper proportionality regions have an approximately equal slope. This is not necessary. It can also be provided that the proportionality regions have a different slope. In the latching area 20 there is an additional restoring force ΔR to be overcome. The latching region 20 also has two falling flanks 22 and 24, in which the restoring force decreases with increasing deflection. Due to the falling flanks 20 and 22, the additional to be overcome latching force .DELTA.R is more noticeable. Between the falling flanks 22, 24 is a rising edge 25, in which the restoring force increases disproportionately with the deflection. By reversing the falling or increasing restoring force, the flank 25 can be perceived as a latching region, as both the rising and the decreasing deflection in the latching region with the falling flanks 22, 24 are reversed.

Von besonderem Interesse ist die Erzeugung von Rastpunkten über eine mit dem Bedienhebel zusammenwirkende Rückstelleinrichtung bei Flurförderzeugen mit halbautomatischen Funktionen. Solche halbautomatischen Funktionen sind beispielsweise die Hubhöhenvorwahl, bei der das Fahrzeug die Last bis zu einer vorgegebenen Hubhöhe hebt und dort eigenständig anhält. Auch die Funktion des Mastsenkrechtstellens kann als eine halbautomatische Funktion ausgeführt sein, die den Hubmast eigenständig senkrecht ausrichtet.Of particular interest is the generation of detent points via a cooperating with the control restoring device for trucks with semi-automatic functions. Such semi-automatic functions include, for example, the Hubhöhenvorwahl, in which the vehicle lifts the load up to a predetermined lift height and stops there independently. Also, the function of Mastsenkrechtstellens can be designed as a semi-automatic function that aligns the mast independently vertically.

Das Auslösen der halbautomatischen Funktion erfolgt über den Bedienhebel. Bei der Hubhöhenvorwahl ist es beispielsweise bekannt, dass durch ein leichtes Zurücknehmen des Bedienhebels in der Nähe der anzufahrenden Hubhöhe die Hubhöhenvorwahl ausgelöst wird. Das Fahrzeug erkennt das leichte Zurücknehmen des Bedienhebels und fährt danach eigenständig die vorgewählte Hubhöhe an.The semi-automatic function is triggered via the operating lever. In the Hubhöhenvorwahl it is known, for example, that the Hubhöhenvorwahl is triggered by a slight withdrawal of the operating lever in the vicinity of the approaching lifting height. The vehicle recognizes the slight retraction of the operating lever and then moves independently to the preselected lifting height.

Bei den erfindungsgemäßen Rastpunkten kann durch ein Durchfahren oder Halten des Bedienhebels in dem Rastbereich geschaltet werden.In the locking points according to the invention can be switched by driving through or holding the operating lever in the latching area.

Ist der Rastbereich, wie in Fig. 3 dargestellt, mittig bei der Auslenkung vorgesehen, ergibt sich der untere und obere Proportionalbereich, in denen die Funktionen wie gewohnt bedient bzw. angesteuert werden können. Eine vorgesehene Automatikfunktion wird nur aktiviert, wenn der Bedienhebel für mindestens einen definierten Zeitraum im Rastpunkt gehalten wird. Bevorzugt kann der Bedienhebel in einem Schaltbereich des Rastpunkts gehalten werden, der beispielsweise durch die steigende Flanke 25 definiert ist. Die Automatikfunktion wird gestartet, wenn der Bedienhebel ausreichend lang in dem Rastbereich gehalten wird, wobei der Zeitraum so gewählt ist, dass eine unbeabsichtigte Aktivierung vermieden ist. Für den nachfolgenden Ablauf sind unterschiedliche Funktionen möglich:

  • Die automatische Funktion wird solange ausgeführt, wie der Bedienhebel im Schaltbereich gehalten wird. Die automatische Funktion wird abgebrochen, wenn der Bedienhebel aus dem Schaltbereich entfernt wird.
  • Die automatische Funktion wird bis zu einem definierten Ende mit einer festgelegten Geschwindigkeit ausgeführt, egal wie der Bedienhebel bewegt wird. Diese Funktion führt einen vorbestimmten Automatikbetrieb aus, ohne dass dieser vom Fahrzeugführer beeinflusst werden kann.
  • Die automatische Funktion wird bis zu einem definierten Ende ausgeführt, wobei über die Proportionalitätsbereiche sich die Geschwindigkeit der Ausführung steuern lässt. Hier kann der Benutzer die Automatikfunktion beispielsweise schneller oder langsamer ausführen lassen.
Is the rest area, as in Fig. 3 shown, provided in the middle of the deflection, results in the lower and upper proportional range in which the functions can be operated or controlled as usual. An intended automatic function is only activated if the operating lever is held in the locking point for at least a defined period of time. Preferably, the operating lever can be held in a switching range of the detent point, which is defined for example by the rising edge 25. The automatic function is started when the operating lever is held in the detent area for a sufficient length of time, the time being chosen so as to avoid unintentional activation. Different functions are possible for the following sequence:
  • The automatic function is executed as long as the operating lever is kept in the switching range. The automatic function is aborted when the operating lever is removed from the shift range.
  • The automatic function is executed at a defined speed up to a defined end, no matter how the operating lever is moved. This function performs a predetermined automatic operation without this being able to be influenced by the driver.
  • The automatic function is executed up to a defined end, whereby the proportionality ranges can be used to control the speed of the execution. Here, for example, the user can have the automatic function executed faster or slower.

Bevorzugt kann auch vorgesehen sein, dass durch ein erneutes Durchfahren des Rastbereichs eine sich in der Ausführung befindliche Betriebsfunktion abgebrochen wird.Preferably, it can also be provided that by repeating the latching area an operating function located in the execution is aborted.

Fig. 3 zeigt den Zusammenhang zwischen Rückstellkraft und Auslenkung bei einem endseitigen Rastpunkt, der bei Auslenkung von mehr als 80 % auftritt. Der Rastbereich 26 entspricht in seiner Ausgestaltung dem Rastbereich aus Fig. 2 mit zwei fallenden Flanken 28 und 30. Der Schaltbereich ist bei dem Ausführungsbeispiel aus Fig. 3 für Auslenkungen größer als die fallende Flanke 30, also für Auslenkungen nahe 100 % vorgesehen. Um den Schaltbereich aus dem Ausführungsbeispiel in Fig. 3 zu erreichen, muss der Rastbereich durchlaufen sein und der Bedienhebel oberhalb des Rastbereichs sich befinden. Fig. 3 shows the relationship between restoring force and deflection at an end rest point, which occurs at deflection of more than 80%. The latching area 26 corresponds in its configuration to the latching area Fig. 2 with two falling edges 28 and 30. The switching range is off in the embodiment Fig. 3 for deflections greater than the falling edge 30, so provided for deflections near 100%. To the switching range from the embodiment in Fig. 3 To reach, the latching area must be run through and the operating lever above the latching area are located.

Bei dieser Ausgestaltung wird die zusätzliche Rastkraft ΔR als Schalter genutzt, bei dessen Durchfahren dann im nachgeordneten Schaltbereich geschaltet wird.In this embodiment, the additional latching force .DELTA.R is used as a switch, is then switched in the downstream switching range in its passage.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Bedienmitteloperating means
1212
Bedienhebeloperating lever
1414
Hebelkopflever head
1616
elastische Manschetteelastic cuff
1818
Grundrahmenbase frame
2020
RastbereichRest area
2222
Flankenflanks
2424
Flankenflanks
2626
RastbereichRest area
2828
Flankenflanks
3030
Flankenflanks

Claims (17)

  1. An industrial truck with operating means (10) having an operating lever (12) and a resetting apparatus that interacts with the operating lever (12) which produces a resetting force for the operating lever (12) depending on its deflection,
    characterized in that
    the resetting apparatus is designed so that a stop section (20) is provided for the deflection in which the resetting force is reduced by a first additional stop force in a falling edge, and increased by a second additional stop force in a rising edge.
  2. The industrial truck according to claim 1, characterized in that the operating means (10) possess a state switch that is switched by overcoming the stop section(12).
  3. The industrial truck according to claim 1 or 2, characterized in that the operating means (10) possess a state switch that is switched by holding the operating lever (12) in the stop section (20).
  4. The industrial truck according to claim 2 or 3, characterized in that the state switch is switched between different vehicle functions or operating modes.
  5. The industrial truck according to one of claims 1 to 4, characterized in that a first deflection section is provided with deflections that are less than the deflection of the stop section (12).
  6. The industrial truck according to one of claims 1 to 5, characterized in that a second deflection section is provided with deflections that are greater than the deflection of the stop section (12).
  7. The industrial truck according to one of claims 1 to 6, characterized in that only a first or a second deflection section is provided, and an additional vehicle function or operating mode is activated as long as the deflection of the operating lever (12) is within the stop section (20).
  8. The industrial truck according to claim 7, characterized in that by holding the operating lever (12) in the stop section (20) for at least a predetermined time, the additional vehicle function or an operating mode is switched to.
  9. The industrial trucks according to one of claims 1 to 6, characterized in that only a first or second deflection section is provided, wherein by passing through the stop section (20) one or more times, the additional vehicle function or an operating mode is switched to.
  10. The industrial truck according to one of claims 7 to 9, characterized in that the additional vehicle function or the operating mode is executed for a predetermined time depending on or independent of a deflection of the operating lever (12).
  11. The industrial truck according to one of the preceding claims, characterized in that a first or a second deflection section are provided, and an additional vehicle function or operating mode is activated as long as the deflection of the operating lever (12) is within the stop section (20).
  12. The industrial trucks according to one of claims 1 to 10, characterized in that a first or second deflection section is provided, wherein by passing through the stop section (20) one or more times, the additional vehicle function or operating mode is switched to.
  13. The industrial truck according to one of claims 11 to 12, characterized in that the additional vehicle function or the operating mode is executed for a predetermined time depending on or independent of a deflection of the operating lever (12).
  14. The industrial truck according to one of the preceding claims, characterized in that again passing through the stop section (20) terminates the additional vehicle function or operating mode.
  15. A method for operating an industrial truck with operating means (10) having an operating lever (12) and a resetting device that interacts with the operating lever (12) and generates a resetting force for the operating lever (12) depending on its deflection, characterized in that a stop section (20) for the deflection is provided in which the resetting force is reduced by a first additional stop force in a falling edge, and increased by an second additional stop force in a rising edge.
  16. The method according to the preceding claim, characterized in that the stop section is switched to by overcoming the additional stop force or by holding the operating lever (12).
  17. The method according to one of the two preceding claims, characterized in that by again overcoming the additional stop force, an enabled vehicle function or operating mode is terminated.
EP17193233.8A 2016-09-29 2017-09-26 Industrial truck with a control unit having a control lever, and a method of operating such an industrial truck Active EP3301067B1 (en)

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US20180088620A1 (en) 2018-03-29
DE102016118459A1 (en) 2018-03-29
EP3301067A1 (en) 2018-04-04
US10664003B2 (en) 2020-05-26

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