EP1046609B2 - Lift truck with moveable mast - Google Patents

Lift truck with moveable mast Download PDF

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Publication number
EP1046609B2
EP1046609B2 EP99107358.6A EP99107358A EP1046609B2 EP 1046609 B2 EP1046609 B2 EP 1046609B2 EP 99107358 A EP99107358 A EP 99107358A EP 1046609 B2 EP1046609 B2 EP 1046609B2
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EP
European Patent Office
Prior art keywords
driver
lifting frame
mast
offset
respect
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99107358.6A
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German (de)
French (fr)
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EP1046609B1 (en
EP1046609A1 (en
Inventor
Stefan Hannemann
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Crown Gabelstapler GmbH and Co KG
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Crown Gabelstapler GmbH and Co KG
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Application filed by Crown Gabelstapler GmbH and Co KG filed Critical Crown Gabelstapler GmbH and Co KG
Priority to DE59908811T priority Critical patent/DE59908811D1/en
Priority to EP99107358.6A priority patent/EP1046609B2/en
Publication of EP1046609A1 publication Critical patent/EP1046609A1/en
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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
    • 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
    • B66F9/08—Masts; Guides; Chains
    • B66F9/10—Masts; Guides; Chains movable in a horizontal direction relative to truck
    • 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
    • B66F9/08—Masts; Guides; Chains

Definitions

  • the invention relates to a reach truck with a vehicle frame, which is supported on at least three wheels on the ground, a traction drive and a steering device, each acting on at least one wheel, a supported on the vehicle frame driver seat, as a car or Carriage trained carrier which is displaceable in the longitudinal direction relative to the vehicle frame, and arranged on the carrier, upwardly extendable mast which carries the longitudinally backwards away from the driver's seat facing forks.
  • a reach truck is already out of the GB-A-2104052 known. Thanks to the double or triple extendable mast, for example, it is possible to deposit and / or pick up loads at high altitudes, with the entire operation being carried out by the driver.
  • the mast and the fork are arranged symmetrically to the vertical longitudinal center plane of the truck, so that the towering on opposite sides of the longitudinal center plane mast halves have the same distance from the longitudinal center.
  • the mast and the fork are not arranged symmetrically to the vertical longitudinal center plane of the truck He corresponds to the preamble.
  • the reach truck has a vehicle frame supported by at least three wheels on the ground, a traction drive and a steering device each acting on at least one wheel, a driver's seat supported on the vehicle frame, a carrier formed as a carriage or a carriage, in the longitudinal direction
  • the mast is designed as a monomast and with respect to a vertical longitudinal center plane of the reach truck "offset in the transverse direction" (laterally displaced) (laterally extendable mast, which is displaceable relative to the vehicle frame, and arranged on the support, upwardly extendable mast shifted and twisted at an angle of 10 °) arranged on the carrier and projects from this carrier.
  • the invention has for its object to provide a reach truck, which obstructs the driver's view to the rear less, without the need to dispense with a functional stable mast.
  • the load fork opposite to the displacement of the mast with respect to this be offset in the transverse direction, the lateral displacements of the mast with respect to the longitudinal center plane and the fork with respect to the mast can be the same size, so that the fork is arranged centrally to the truck.
  • the fork takes a symmetrical position again, so that the lifted loads act evenly on the lateral wheels of the truck.
  • a further advantageous measure consists in compensating in whole or in part for the imbalance caused by the lateral displacement of the mast, by means of a displacement of weight-bearing components of the stacker in the sense of a lateral wheel load compensation.
  • the tank for the hydraulic oil, the hydraulic pump motor and / or valves can be offset to the left to compensate for the imbalance created by a displacement of the mast to the right again.
  • the reach truck 1 has a vehicle frame 2 with two outwardly extending rearward wheel arms 3, 4, on which the wheels 5 and 6 are mounted. At the front end of the truck, a third wheel 7 is provided, which is designed as a drive and steering wheel.
  • a largely open front cab 8 is supported, in the predominantly left of the longitudinal center plane 9 of the stacker 1, the transversely oriented driver's seat and right of the longitudinal center plane 9 which are also inclined with a transverse component steering column 11 are arranged with the steering wheel 12, as it FIG. 3 most clearly shows.
  • a carrier 17 is provided which is designed as a carriage with rollers which are guided in facing C-shaped guide profiles 18, 19 on the inner sides of the wheel arms 3, 4.
  • a mast 22 which consists essentially of a left mast half 23 and a right mast half 24.
  • the same mast halves 23 and 24 are hinged at the upper end of the support plates 20, 21 to this coaxially, with a limited inclinability of the mast 22 may be provided by a few degrees forward and backward in a known manner.
  • the scaffolding shafts 23 and 24 are interconnected by crosspieces, wherein in FIG. 2 an upper crosspiece 25 is shown.
  • Each mast half 23, 24 has, according to FIG. 3, two double T-sections 26, 27 which can be extended individually hydraulically upwardly in relation to a U-shaped guide 28.
  • a hydraulic lifting cylinder 29 FIG. 2
  • FIG. 2 has a cylinder tube 30 and a telescopic rod 31 that can be extended upward therefrom, which carries at its upper end a deflection head 32, via which a chain (not shown) is guided, one end of which is attached to a mounting block 33 at the upper end of the cylinder tube 30 is fixed and whose other end is fixed to the guided to the mast halves 23, 24 load fork 13.
  • the load fork 13 is raised during extension of the telescopic rod 31.
  • a further lifting of the fork by hydraulic lifting of the double-T profiles 26 and 27, to which also lifting chains (not shown) are used.
  • the mast 22 of the illustrated and described embodiment is 3 times extendable, which lift heights of more than 10 m can be achieved.
  • FIG. 3 is the outside of the right mast half 24 at a greater distance a to the longitudinal center plane 9, while the outside of the left mast half 23 is at a smaller distance b to the longitudinal center plane 9.
  • the mast 22 is laterally offset to the right.
  • the center offset may be 36 mm.
  • the fork 13 is arranged on the mast 22 to the same extent set back laterally, so that the load fork 13 is arranged symmetrically to the longitudinal center plane 9 and its two outer sides each have the same distance c to the longitudinal center plane 9, as in FIG. 3 is clarified.
  • the displacement of the mast 22 to the right provides the opportunity to enhance the driver's rearward vision.
  • FIG. 3 are - starting from the eyes of the normally seated on the driver's seat 10 driver beam point S - the two highlighted by hatching angular ranges L and R drawn in which the mast 22, the driver takes the view. Since the lifting cylinder 29 is additionally offset in the direction of the right mast half 24, results in a comparatively large field of view between the two hidden angle ranges L and R.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Description

Die Erfindung bezieht sich auf einen Schubmast-Stapler mit einem Fahrzeugrahmen, der über mindestens drei Räder auf dem Boden abgestützt ist, einer Fahrantriebs-und einer Lenkeinrichtung, die jeweils auf mindestens ein Rad einwirken, einem auf dem Fahrzeugrahmen abgestützten Fahrersitz, einem als Wagen oder Schlitten ausgebildeten Träger, der in Längsrichtung gegenüber dem Fahrzeugrahmen verschiebbar ist, und einem auf dem Träger angeordneten, nach oben ausfahrbaren Hubgerüst, das die in Längsrichtung nach hinten weg vom Fahrersitz weisende Lastgabel trägt. Ein derartiger Schubmaststapler ist bereits aus des GB-A-2104052 bekannt. Dank des beispielsweise zweifach oder dreifach ausfahrbaren Hubgerüstes lassen sich Lasten auch in großer Höhe absetzen bzw. aufnehmen, wobei die gesamte Bedienung durch den Fahrer erfolgt.The invention relates to a reach truck with a vehicle frame, which is supported on at least three wheels on the ground, a traction drive and a steering device, each acting on at least one wheel, a supported on the vehicle frame driver seat, as a car or Carriage trained carrier which is displaceable in the longitudinal direction relative to the vehicle frame, and arranged on the carrier, upwardly extendable mast which carries the longitudinally backwards away from the driver's seat facing forks. Such a reach truck is already out of the GB-A-2104052 known. Thanks to the double or triple extendable mast, for example, it is possible to deposit and / or pick up loads at high altitudes, with the entire operation being carried out by the driver.

Beim bekannten Schubmaststapler sind das Hubgerüst und die Lastgabel symmetrisch zur vertikalen Längsmittelebene des Staplers angeordnet, so dass die auf gegenüberliegenden Seiten der Längs-Mittel- Ebene aufragenden Hubgerüsthälften gleichen Abstand zur Längsmitte aufweisen. Nach den der Erfindung zugrundeliegenden Erkenntnissen ist diese symmetrische Anordnung der Grund dafür, dass die Sichtverhältnisse für den Fahrer beim Aufnehmen bzw. Absetzen einer Last nicht optimal sind, weil beim Blick nach hinten nicht beide Gabelspitzen gleichzeitig und nicht aus der normalen Sitzposition des Fahrers zu sehen sind. Zumindest eine der beiden Gabelspitzen kommt nur dann ins Blickfeld des Fahrers, wenn dieser die übliche Sitzstellung verlässt und sich merklich zur Seite lehnt und/oder nach vorne beugt.In the known reach truck, the mast and the fork are arranged symmetrically to the vertical longitudinal center plane of the truck, so that the towering on opposite sides of the longitudinal center plane mast halves have the same distance from the longitudinal center. According to the findings of the invention is this symmetrical arrangement of the reason that the visibility for the driver when picking up or stopping a load are not optimal, because when looking back not both forks simultaneously and not seen from the driver's normal sitting position are. At least one of the two fork tips comes into the driver's field of vision only when it leaves the usual sitting position and leans noticeably to the side and / or bends forwards.

Bei einem anderen Schubmaststapler aus der JP-A 7-9909 sind das Hubgerüst und die Lastgabel nicht symmetrisch zur vertikalen Längsmittelebene des Staplers angeordnet Er entspricht dem Oberbegriff. Der Schubmaststapler hat einen Fahrzeugrahmen, der über mindestens drei Räder auf dem Boden abgestützt ist, eine Fahrantriebs- und einer Lenkeinrichtung, die jeweils auf mindestens ein Rad einwirkt, einen auf dem Fahrzeugrahmen abgestützten Fahrersitz, einen als Wagen oder Schlitten ausgebildeten Träger, der in Längsrichtung gegenüber dem Fahrzeugrahmen verschiebbar ist, und ein auf dem Träger angeordnetes, nach oben ausfahrbares Hubgerüst, das die in Längsrichtung nach hinten weg vom Fahrersitz weisende Lastgabel trägt Das Hubgerüst ist als Monomast ausgebildet und gegenüber einer vertikalen Längsmittelebene des Schubmaststaplers "in Querrichtung versetzt" (seitlich verschoben und in einem Winkel von 10° verdreht) auf dem Träger angeordnet und ragt vom diesem Träger auf. Es ist ein vertikaler Hubzylinder in dem Monomasten angeordnet und für die Lastgabel vorgesehen.In another reach truck from the JP-A 7-9909 the mast and the fork are not arranged symmetrically to the vertical longitudinal center plane of the truck He corresponds to the preamble. The reach truck has a vehicle frame supported by at least three wheels on the ground, a traction drive and a steering device each acting on at least one wheel, a driver's seat supported on the vehicle frame, a carrier formed as a carriage or a carriage, in the longitudinal direction The mast is designed as a monomast and with respect to a vertical longitudinal center plane of the reach truck "offset in the transverse direction" (laterally displaced) (laterally extendable mast, which is displaceable relative to the vehicle frame, and arranged on the support, upwardly extendable mast shifted and twisted at an angle of 10 °) arranged on the carrier and projects from this carrier. There is a vertical lifting cylinder arranged in the monomast and provided for the fork.

Der Erfindung liegt die Aufgabe zugrunde, einen Schubmaststapler zu schaffen, der die Fahrersicht nach hinten weniger behindert, ohne dass deswegen auf ein funktionsgerechtes stabiles Hubgerüst verzichtet werden muss.The invention has for its object to provide a reach truck, which obstructs the driver's view to the rear less, without the need to dispense with a functional stable mast.

Diese Aufgabe wird erfindungsgemäß mit Anspruch 1 gelöst.This object is achieved with claim 1.

Durch eine unsymmetrische Anordnung des Hubgerüstes wird es möglich, das Hubgerüst so zu platzieren, dass es die Sicht des Fahrers nach hinten geringstmöglich beeinträchtigt Insbesondere lässt sich eine Anordnung erreichen, bei welcher der auf dem Fahrersitz sitzende Fahrer ohne Verrenkungen des Körpers und ohne Verlagerungen des Kopfes bzw. der Augen beide Gabelspitzen sehen kann. Das begünstigt ein sicheres und zügiges Einfahren der Lastgabel unter die auf einer Palette befindliche Last. Bei dem beanspruchten Schubmaststapler mit einem zwischen den im Querabstand aufragenden Hubgerüsthälften angeordneten vertikalen Hubzylinder für die Lastgabel wird der Hubzylinder außermittig zwischen den Gerüsthälften so angeordnet und in der Versetzungsrichtung des Hubgerüstes weiter seitlich versetzt: auf diese Weise werden Sichtbehinderungen des Fahrers durch den Hubzylinder ebenfalls herabgesetzt. wobei ein vergleichsweise großes und optimal platziertes Blickfeld zwischen den beiden Hubgerüsthälften erreicht wird.By an asymmetrical arrangement of the mast, it is possible to place the mast so that it minimally affects the driver's rearward view In particular, can achieve an arrangement in which the driver sitting on the driver's seat without dislocations of the body and without displacements of the head or the eyes can see both fork tips. This promotes a safe and speedy retraction of the fork under the load on a pallet. In the claimed reach truck with a between the towering in the transverse distance mast halves arranged vertical lifting cylinder for the fork of the lifting cylinder is arranged eccentrically between the frame halves and laterally offset in the direction of displacement of the mast: in this way obstruction of the driver by the lifting cylinder are also reduced. whereby a comparatively large and optimally placed field of view between the two mast halves is achieved.

Zweckmäßige Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen. Danach sind das Hubgerüst und der Fahrersitz entgegengesetzt zur Längsmittelebene des Staplers versetzt, wobei der Fahrersitz in Querrichtung ausgerichtet ist.Advantageous embodiments and modifications of the invention will become apparent from the dependent claims. Thereafter, the mast and the driver's seat are opposite to the longitudinal center plane of the truck offset, the driver's seat is aligned in the transverse direction.

Mit Vorteil kann die Lastgabel entgegengesetzt zur Versetzung des Hubgerüstes gegenüber diesem in Querrichtung versetzt sein, wobei die seitlichen Versetzungen des Hubgerüstes gegenüber der Längsmittelebene und der Lastgabel gegenüber dem Hubgerüst gleich groß sein können, so dass die Lastgabel mittig zum Stapler angeordnet ist. Somit nimmt die Lastgabel wieder eine symmetrische Stellung ein, so dass die angehobenen Lasten gleichmäßig auf die seitlichen Räder des Staplers einwirken.Advantageously, the load fork opposite to the displacement of the mast with respect to this be offset in the transverse direction, the lateral displacements of the mast with respect to the longitudinal center plane and the fork with respect to the mast can be the same size, so that the fork is arranged centrally to the truck. Thus, the fork takes a symmetrical position again, so that the lifted loads act evenly on the lateral wheels of the truck.

Eine weitere vorteilhafte Maßnahme besteht darin, das durch die seitliche Versetzung des Hubgerüsts bedingte Ungleichgewicht durch eine gegenüber bisheriger Platzierung erfolgende Verlagerung von gewichtigen Komponenten des Staplers im Sinne eines seitlichen Radlastausgleichs ganz oder teilweise zu kompensieren. Beispielsweise lassen sich der Tank für das Hydrauliköl, der Hydraulikpumpenmotor und/oder Ventile nach links versetzen, um das durch eine Versetzung des Hubgerüstes nach rechts geschaffene Ungleichgewicht wieder auszugleichen.A further advantageous measure consists in compensating in whole or in part for the imbalance caused by the lateral displacement of the mast, by means of a displacement of weight-bearing components of the stacker in the sense of a lateral wheel load compensation. For example, the tank for the hydraulic oil, the hydraulic pump motor and / or valves can be offset to the left to compensate for the imbalance created by a displacement of the mast to the right again.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand einer schematischen Zeichnung näher erläutert. Es zeigen:

  • Figur 1 den Schubmaststapler in Seitenansicht;
  • Figur 2 den Schubmaststapler in einer Rückansicht
  • Figur 3 den Schubmaststapler in einer Draufsicht, wobei die Gesichtsfeldeinschränkung des Fahrers durch das Hubgerüst und den Hubzylinder durch schraffierte Strahlenbereiche kenntlich gemacht sind.
An embodiment of the invention will be explained in more detail with reference to a schematic drawing. Show it:
  • FIG. 1 the reach truck in side view;
  • FIG. 2 the reach truck in a rear view
  • FIG. 3 the reach truck in a plan view, wherein the field of view limitation of the driver through the mast and the lifting cylinder are marked by hatched beam areas.

Der Schubmaststapler 1 weist einen Fahrzeugrahmen 2 mit zwei sich außenseitig nach hinten erstreckenden Radarmen 3, 4 auf, an denen die Räder 5 und 6 gelagert sind. Am vorderen Ende des Staplers ist ein drittes Rad 7 vorgesehen, das als Antriebsund Lenkrad ausgebildet ist. Auf dem Fahrzeugrahmen 2 stützt sich eine weitgehend offene vordere Fahrerkabine 8 ab, in der überwiegend links von der Längsmittelebene 9 des Staplers 1 der quer ausgerichtete Fahrersitz und rechts von der Längsmittelebene 9 die ebenfalls mit einer Querkomponente geneigte Lenksäule 11 mit dem Lenkrad 12 angeordnet sind, wie es Figur 3 am deutlichsten zeigt.The reach truck 1 has a vehicle frame 2 with two outwardly extending rearward wheel arms 3, 4, on which the wheels 5 and 6 are mounted. At the front end of the truck, a third wheel 7 is provided, which is designed as a drive and steering wheel. On the vehicle frame 2, a largely open front cab 8 is supported, in the predominantly left of the longitudinal center plane 9 of the stacker 1, the transversely oriented driver's seat and right of the longitudinal center plane 9 which are also inclined with a transverse component steering column 11 are arranged with the steering wheel 12, as it FIG. 3 most clearly shows.

Im Einwirkungsbereich des sitzenden Fahrers sind weitere Bedienelemente für den Fahrbetrieb und für den Hubbetrieb des Staplers 1 angeordnet, die nicht im einzelnen dargestellt sind und beschrieben werden, da sie allgemein bekannt sind und für das Verständnis der Erfindung keine Rolle spielen. Entsprechendes gilt für die Antriebseinrichtung und für die hydraulische Einrichtung zum Heben sowie Längsverlagern und ggf. Neigen der Last bzw. der Lastgabel 13 mit den nach hinten weisenden Zinken 14 und 15, die über ein Gabelquerstück 16 miteinander verbunden sind.In the area of action of the seated driver further controls for the driving and for the lifting operation of the truck 1 are arranged, which are not shown in detail and will be described, since they are well known and play no role in the understanding of the invention. The same applies to the drive device and the hydraulic device for lifting and longitudinal displacement and possibly tilting of the load or the load fork 13 with the rearwardly facing tines 14 and 15, which are interconnected via a fork cross piece 16.

Zur Längsverschiebung der Lastgabel 13 bei stillstehendem Schubmaststapler 1 ist ein Träger 17 vorgesehen, der als Wagen mit Rollen ausgebildet ist, die in einander zugewandten C-förmigen Führungsprofilen 18, 19 an den Innenseiten der Radarme 3, 4 geführt sind.For longitudinal displacement of the load fork 13 with a stationary reach truck 1, a carrier 17 is provided which is designed as a carriage with rollers which are guided in facing C-shaped guide profiles 18, 19 on the inner sides of the wheel arms 3, 4.

An den Träger 17 ist über zwei seitlich aufragende Stützbleche 20, 21 ein Hubgerüst 22 angeschlossen, das im wesentlichen aus einer linken Hubgerüsthälfte 23 und einer rechten Hubgerüsthälfte 24 besteht. Die gleichartigen Hubgerüsthälften 23 und 24 sind am oberen Ende der Stützbleche 20, 21 an diese gleichachsig angelenkt, wobei in bekannter Weise eine begrenzte Neigbarkeit des Hubgerüstes 22 um wenige Grad vorwärts wie rückwärts vorgesehen sein kann. Die Gerüsthäften 23 und 24 sind durch Querstücke miteinander verbunden, wobei in Figur 2 ein oberes Querstück 25 dargestellt ist.To the carrier 17 is connected via two laterally projecting support plates 20, 21, a mast 22 which consists essentially of a left mast half 23 and a right mast half 24. The same mast halves 23 and 24 are hinged at the upper end of the support plates 20, 21 to this coaxially, with a limited inclinability of the mast 22 may be provided by a few degrees forward and backward in a known manner. The scaffolding shafts 23 and 24 are interconnected by crosspieces, wherein in FIG. 2 an upper crosspiece 25 is shown.

Jede Hubgerüsthälfte 23, 24 weist gemäß Figur 3 zwei Doppel-T-Profile 26, 27 auf, die gegenüber einer U-förmigen Führung 28 einzeln hydraulisch nach oben ausfahrbar sind. In das Hubgerüst 22 ist ferner ein hydraulischer Hubzylinder 29 (Figur 2) integriert, der ein Zylinderrohr 30 und eine gegenüber diesem nach oben ausfahrbare Teleskopstange 31 aufweist, die an ihrem oberen Ende einen Umlenkkopf 32 trägt, über die eine nicht dargestellte Kette geführt ist, deren eines Ende an einem Befestigungsklotz 33 am oberen Ende des Zylinderrohrs 30 befestigt ist und deren anderes Ende an der an den Hubgerüsthälften 23, 24 geführten Lastgabel 13 befestigt ist. Dementsprechend wird die Lastgabel 13 beim Ausfahren der Teleskopstange 31 angehoben. Ein weiteres Anheben der Lastgabel erfolgt durch hydraulisches Hochfahren der Doppel-T-Profile 26 und 27, wozu gleichfalls Hubketten (nicht dargestellt) eingesetzt werden. Dementsprechend ist das Hubgerüst 22 des dargestellten und beschriebenen Ausführungsbeispiels 3-fach ausfahrbar, womit Hubhöhen von mehr als 10 m erreicht werden können.Each mast half 23, 24 has, according to FIG. 3, two double T-sections 26, 27 which can be extended individually hydraulically upwardly in relation to a U-shaped guide 28. In the mast 22 is also a hydraulic lifting cylinder 29 ( FIG. 2 ), which has a cylinder tube 30 and a telescopic rod 31 that can be extended upward therefrom, which carries at its upper end a deflection head 32, via which a chain (not shown) is guided, one end of which is attached to a mounting block 33 at the upper end of the cylinder tube 30 is fixed and whose other end is fixed to the guided to the mast halves 23, 24 load fork 13. Accordingly, the load fork 13 is raised during extension of the telescopic rod 31. A further lifting of the fork by hydraulic lifting of the double-T profiles 26 and 27, to which also lifting chains (not shown) are used. Accordingly, the mast 22 of the illustrated and described embodiment is 3 times extendable, which lift heights of more than 10 m can be achieved.

Bedeutsam für die Erfindung ist die quergerichtete bzw. seitliche Versetzung des Hubgerüstes 22 gegenüber der Längsmittelebene 9, wie es aus Figuren 2 und 3 zu ersehen ist. Gemäß Figur 3 befindet sich die Außenseite der rechten Hubgerüsthälfte 24 im größeren Abstand a zur Längsmittelebene 9, während sich die Außenseite der linken Hubgerüsthälfte 23 im kleineren Abstand b zur Längsmittelebene 9 befindet. Dementsprechend ist das Hubgerüst 22 seitlich nach rechts versetzt. Beispielsweise kann bei einer Hubgerüstbreite von 700 mm die Mittenversetzung 36 mm betragen.Significant for the invention is the transverse or lateral displacement of the mast 22 with respect to the longitudinal center plane 9, as it is made Figures 2 and 3 can be seen. According to FIG. 3 is the outside of the right mast half 24 at a greater distance a to the longitudinal center plane 9, while the outside of the left mast half 23 is at a smaller distance b to the longitudinal center plane 9. Accordingly, the mast 22 is laterally offset to the right. For example, with a mast width of 700 mm, the center offset may be 36 mm.

Die Lastgabel 13 ist jedoch am Hubgerüst 22 in gleichem Maße wieder seitlich zurückversetzt angeordnet, so daß die Lastgabel 13 symmetrisch zur Längsmittelebene 9 angeordnet ist und ihre beiden Außenseiten jeweils den gleichen Abstand c zur Längsmittelebene 9 aufweisen, wie es in Figur 3 verdeutlicht ist.However, the fork 13 is arranged on the mast 22 to the same extent set back laterally, so that the load fork 13 is arranged symmetrically to the longitudinal center plane 9 and its two outer sides each have the same distance c to the longitudinal center plane 9, as in FIG. 3 is clarified.

In Verbindung mit dem linksseitig angeordneten Fahrersitz schafft die Versetzung des Hubgerüstes 22 nach rechts die Möglichkeit, die Sicht des Fahrers nach hinten zu verbessern. In Figur 3 sind - ausgehend vom den Augen des ganz normal auf dem Fahrersitz 10 sitzenden Fahrers zugeordneten Strahlenpunkt S - die beiden durch Schraffur hervorgehobenen Winkelbereiche L und R eingezeichnet, in denen das Hubgerüst 22 dem Fahrer die Sicht nimmt. Da der Hubzylinder 29 zusätzlich in Richtung auf die rechte Hubgerüsthälfte 24 versetzt ist, ergibt sich ein vergleichsweise großer Sichtbereich zwischen den beiden ausgeblendeten Winkelbereichen L und R.In conjunction with the left-side driver's seat, the displacement of the mast 22 to the right provides the opportunity to enhance the driver's rearward vision. In FIG. 3 are - starting from the eyes of the normally seated on the driver's seat 10 driver beam point S - the two highlighted by hatching angular ranges L and R drawn in which the mast 22, the driver takes the view. Since the lifting cylinder 29 is additionally offset in the direction of the right mast half 24, results in a comparatively large field of view between the two hidden angle ranges L and R.

Die Darstellung in Figur3 veranschaulicht, daß die Anordnung so getroffen werden kann, daß vom Fahrersitz aus die freien Enden beider Gabelzinken 14, 15 zu sehen sind. Das entspricht einer gegenüber bisherigen Verhältnissen verbesserten Sicht, die dem Fahrer seine Arbeit und namentlich das Unterfahren von Lasten bzw. Paletten erleichtert.The representation in Figur3 illustrates that the arrangement can be made so that from the driver's seat, the free ends of both forks 14, 15 can be seen. This corresponds to a comparison with previous conditions improved visibility, which facilitates the driver's job and especially the driving under loads or pallets.

Claims (5)

  1. Reach truck comprising a vehicle frame (2) supported by at least three wheels (5 to 7) on the floor, a traction and a steering device, each acting on at least one wheel (7), a driver's seat (10) supported on the vehicle frame (2), a carrier (17) configured as a wagon or carriage, displaceable in a longitudinal direction with respect to the vehicle frame (2), and a lifting frame (22), arranged on the carrier (17) and extendable upwards, the lifting frame bearing a load fork (13) pointing away from the driver's seat (10) rearward in the longitudinal direction;
    - wherein the lifting frame (22) is arranged on the carrier (17) so as to be offset in transverse direction with respect to a vertical longitudinal mid-plane (9) of the reach truck (1) and projects upwards from this carrier (17);
    - and having a vertical lifting cylinder (29) for the load fork (13) arranged between halves (23, 24) of the lifting frame (22), the halves projecting with a transverse spacing;
    - characterized in that the lifting cylinder (29) is arranged off-centre between the halves (23, 24) of the lifting frame, and is further offset laterally in the direction of offset of the lifting frame (22).
  2. Reach truck according to claim 1, having the driver's seat (10) offset laterally with respect to the vertical longitudinal mid-plane (9), wherein the lifting frame (22) and the driver's seat (10) are offset in opposite directions with respect to the longitudinal mid-plane (9) of the reach truck (1).
  3. Reach truck according to claim 1 or 2, wherein the driver's seat (10) is aligned in the transverse direction.
  4. Reach truck according to one of claims 1 to 3, wherein the load fork (13) is offset with respect to the lifting frame (22) in the transverse direction in the direction opposite to the offset of the said lifting frame (22).
  5. Reach truck according to claim 4, wherein the lateral offsets of the lifting frame (22) with respect to the longitudinal mid-plane (9) and of the load fork (13) with respect to the lifting frame (22) are equally sized, so that the load fork (13) is arranged centrally in relation to the truck (1).
EP99107358.6A 1999-04-21 1999-04-21 Lift truck with moveable mast Expired - Lifetime EP1046609B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE59908811T DE59908811D1 (en) 1999-04-21 1999-04-21 Reach truck
EP99107358.6A EP1046609B2 (en) 1999-04-21 1999-04-21 Lift truck with moveable mast

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99107358.6A EP1046609B2 (en) 1999-04-21 1999-04-21 Lift truck with moveable mast

Publications (3)

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EP1046609A1 EP1046609A1 (en) 2000-10-25
EP1046609B1 EP1046609B1 (en) 2004-03-10
EP1046609B2 true EP1046609B2 (en) 2017-07-19

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EP99107358.6A Expired - Lifetime EP1046609B2 (en) 1999-04-21 1999-04-21 Lift truck with moveable mast

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DE (1) DE59908811D1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2920363B1 (en) * 2007-08-28 2010-01-29 Pierre Pelloux TOWING VEHICLE WITH SIDE DISPLACEMENT
MX341580B (en) 2008-09-12 2016-08-25 Crown Equipment Corp * Monomast for a materials handling vehicle.

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3490633A (en) † 1968-02-01 1970-01-20 Case Co J I Assembly for laterally shifting and pivoting a mast of a lift truck
US4355703A (en) † 1979-03-08 1982-10-26 Clark Equipment Company Upright for lift truck
GB2104052A (en) † 1981-07-03 1983-03-02 Knut Jacobsson Handling storage units, e.g. pallets
GB2118140A (en) † 1982-04-08 1983-10-26 Barlow Handling Limited Extending mast of fork lift truck
EP0126634A1 (en) † 1983-05-18 1984-11-28 Lancer Boss Limited Telescopic mast assembly
US4506764A (en) † 1981-10-22 1985-03-26 Firma Jungheinrich Unternehmensverwaltung Kg Lift truck
JPH079909A (en) † 1993-06-24 1995-01-13 Sekisui Chem Co Ltd Lodge for vehicle

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH079909Y2 (en) 1990-04-25 1995-03-08 東洋運搬機株式会社 forklift

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3490633A (en) † 1968-02-01 1970-01-20 Case Co J I Assembly for laterally shifting and pivoting a mast of a lift truck
US4355703A (en) † 1979-03-08 1982-10-26 Clark Equipment Company Upright for lift truck
GB2104052A (en) † 1981-07-03 1983-03-02 Knut Jacobsson Handling storage units, e.g. pallets
US4506764A (en) † 1981-10-22 1985-03-26 Firma Jungheinrich Unternehmensverwaltung Kg Lift truck
GB2118140A (en) † 1982-04-08 1983-10-26 Barlow Handling Limited Extending mast of fork lift truck
EP0126634A1 (en) † 1983-05-18 1984-11-28 Lancer Boss Limited Telescopic mast assembly
JPH079909A (en) † 1993-06-24 1995-01-13 Sekisui Chem Co Ltd Lodge for vehicle

Also Published As

Publication number Publication date
EP1046609B1 (en) 2004-03-10
EP1046609A1 (en) 2000-10-25
DE59908811D1 (en) 2004-04-15

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