EP1046609B1 - Lift truck with moveable mast - Google Patents

Lift truck with moveable mast Download PDF

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Publication number
EP1046609B1
EP1046609B1 EP99107358A EP99107358A EP1046609B1 EP 1046609 B1 EP1046609 B1 EP 1046609B1 EP 99107358 A EP99107358 A EP 99107358A EP 99107358 A EP99107358 A EP 99107358A EP 1046609 B1 EP1046609 B1 EP 1046609B1
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EP
European Patent Office
Prior art keywords
lifting frame
offset
driver
respect
seat
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
EP99107358A
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German (de)
French (fr)
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EP1046609B2 (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 EP99107358.6A priority Critical patent/EP1046609B2/en
Priority to DE59908811T priority patent/DE59908811D1/en
Publication of EP1046609A1 publication Critical patent/EP1046609A1/en
Publication of EP1046609B1 publication Critical patent/EP1046609B1/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 has at least three wheels on the ground is supported, a traction drive and a steering device, each acting on at least one wheel, one on the Vehicle frame supported driver seat, as a car or Carriage-formed carrier, facing longitudinally the vehicle frame is displaceable, and one on the carrier arranged, upwardly extendable mast, the in Longitudinally to the rear away from the driver's seat facing fork wearing.
  • a reach truck is already known from GB-A-2104052 known.
  • Such a reach truck is known. Thanks to the example two or three times extendable mast to settle loads even at high altitude or record, where the entire operation is done by the driver.
  • the invention has the object, a Reach truck to provide the driver's view to the rear less obstructed, without being on a functional basis stable mast must be waived.
  • the fork can be opposite to the offset the mast are transversely offset from it, wherein the lateral displacements of the mast with respect to Longitudinal middle and the fork opposite the mast can be the same size, so that the fork in the middle of the truck is arranged.
  • the fork takes a symmetrical again Position so that the lifted loads are even act on the lateral wheels of the truck.
  • Another advantageous measure is that by the lateral displacement of the mast conditional imbalance by a shift compared to previous placement of weighty components of the truck in the sense of a compensate for lateral Radlastaus originates in whole or in part.
  • the tank for the hydraulic oil, the hydraulic pump motor and / or valves to the left by the created by a displacement of the mast to the right Balance imbalance again.
  • the reach truck 1 has a vehicle frame 2 with two Radar arms 3, 4 extending to the rear on the outside, where the wheels 5 and 6 are stored. At the front end of the Stacker is a third wheel 7 is provided as the drive and Steering wheel is formed.
  • On the vehicle frame 2 supports a largely open front cab 8 from, in the predominantly left of the longitudinal center plane 9 of the stacker 1 of transversely oriented driver's seat and right of the median longitudinal plane 9 also inclined with a transverse component steering column 11 are arranged with the steering wheel 12, as shown in FIG 3 am most clearly shows.
  • a carrier 17 is provided as a car is formed with rollers which face each other in a C-shaped Guide profiles 18, 19 on the inner sides of the wheel arms 3, 4 are guided.
  • the carrier 17 To the carrier 17 is via two laterally upstanding support plates 20, 21 connected to a mast 22, which consists essentially of a left mast half 23 and a right mast half 24 exists.
  • the same mast halves 23 and 24 are at the upper end of the support plates 20, 21 to these coaxial articulated, with a limited inclinability in a known manner of the mast 22 by a few degrees forward and backward can be provided.
  • the frameworks 23 and 24 are through Cross pieces connected to each other, in Figure 2 an upper Crosspiece 25 is shown.
  • Each mast half 23, 24 has according to Figure 3, two double-T profiles 26, 27, which are opposite to a U-shaped guide 28 individually hydraulically extendable upwards.
  • a hydraulic lifting cylinder 29 ( Figure 2) integrated, a cylinder tube 30 and one opposite to this has telescopic rod 31 extendable above, at its upper End carries a deflection head 32, via which a not shown Chain is guided, whose one end is attached to a mounting block 33 is attached to the upper end of the cylinder tube 30 and the other end thereof at the mast halves 23, 24 guided load fork 13 is attached. Accordingly, the Load fork 13 raised during extension of the telescopic rod 31.
  • a further lifting of the fork is done by hydraulic Raising the double-T profiles 26 and 27, to which also Hubketten (not shown) can be used. Accordingly is the mast 22 of the illustrated and described Embodiment 3 times extendable, which lifting heights of more than 10 m can be achieved.
  • FIG 3 is the outside of the right mast half 24th at a greater distance a to the longitudinal center plane 9, while the Outside of the left mast half 23 at a smaller distance b is located to the longitudinal center plane 9.
  • the mast 22 offset laterally to the right.
  • the center offset should be 36 mm.
  • the fork 13 is on the mast 22 to the same extent arranged back again laterally, so that the fork 13 is arranged symmetrically to the longitudinal center plane 9 and their both outer sides in each case the same distance c to the longitudinal center plane 9, as illustrated in FIG.
  • FIG. 3 illustrates that the arrangement can be made so that from the driver's seat, the free ends Both forks 14, 15 can be seen. That corresponds to one compared to previous conditions improved visibility, the the driver's work and in particular the underrun of loads or pallets facilitated.

Description

Die Erfindung bezieht sich auf einen Schubmaststapler 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.The invention relates to a reach truck with a Vehicle frame, which has at least three wheels on the ground is supported, a traction drive and a steering device, each acting on at least one wheel, one on the Vehicle frame supported driver seat, as a car or Carriage-formed carrier, facing longitudinally the vehicle frame is displaceable, and one on the carrier arranged, upwardly extendable mast, the in Longitudinally to the rear away from the driver's seat facing fork wearing. Such a reach truck is already known from GB-A-2104052 known.

Ein solcher Schubmaststapler ist 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.Such a reach truck is known. Thanks to the example two or three times extendable mast to settle loads even at high altitude or record, where the entire operation is done 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 Längsmittelebene 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 are the mast and the Load fork symmetrical to the vertical longitudinal center plane of the truck arranged so that on opposite sides of the Longitudinal plane towering mast halves same distance to the longitudinal center. After the invention of the underlying Findings, this symmetrical arrangement is the reason that the visibility for the driver when recording or stopping a load are not optimal, because when looking not both fork tips at the same time and not at the back the normal sitting position of the driver can be seen. At least one of the two fork tips only comes into the field of vision Driver, if this leaves the usual sitting position and himself leans noticeably to the side and / or bends forward.

Dementsprechend liegt der Erfindung 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.Accordingly, the invention has the object, a Reach truck to provide the driver's view to the rear less obstructed, without being on a functional basis stable mast must be waived.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Hubgerüst gegenüber der vertikalen Längsmittelebene des Staplers in Querrichtung versetzt vom Träger aufragt.This object is achieved in that the mast opposite the vertical longitudinal center plane of the stacker transversely offset from the carrier rises.

Durch diese unsymmetrische Anordnung des Hubgerüstes wird es möglich, das Hubgerüst so zu plazieren, 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.Due to this asymmetrical arrangement of the mast is possible to place the mast so that it is the view of the Driver's back affected as little as possible. Especially can achieve an arrangement in which the on drivers sitting in the driver's seat without any body contortions and without displacements of the head or eyes both fork tips able to see. This favors a safe and speedy Retracting the forks below those on a pallet Load.

Zweckmäßige Ausgestaltungen und weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen. Danach sind das Hubgerüst und der Fahrersitz entgegengesetzt zur Längsmittelebene des Staplers versetzt, wobei der Fahrersitz in Querrichtung ausgerichtet ist.Advantageous embodiments and refinements of the invention emerge from the dependent claims. After that are the mast and the driver's seat opposite to the longitudinal median plane of the Stacker offset, with the driver's seat aligned in the transverse direction is.

Mit Vorteil kann die Lastgabel entgegengesetzt zur Versetzung des Hubgerüstes gegenüber diesem in Querrichtung versetzt sein, wobei die seitlichen Versetzungen des Hubgerüstes gegenüber der Längsmitteleben 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 fork can be opposite to the offset the mast are transversely offset from it, wherein the lateral displacements of the mast with respect to Longitudinal middle and the fork opposite the mast can be the same size, so that the fork in the middle of the truck is arranged. Thus, the fork takes a symmetrical again Position so that the lifted loads are even act on the lateral wheels of the truck.

Es hat sich als zweckmäßig erwiesen, bei einem Schubmaststapler mit einem zwischen den im Querabstand aufragenden Hubgerüsthälften angeordneten vertikalen Hubzylinder für die Lastgabel auch den Hubzylinder außermittig zwischen den Gerüsthälften anzuordnen und insbesondere den Hubzylinder in Versetzungsrichtung des Hubgerüstes weiter seitlich zu versetzen. Auf diese Weise lassen sich Sichtbehinderungen des Fahrers durch den Hubzylinder ebenfalls herabsetzen, wobei sich ein vergleichsweise großes und optimal plaziertes Blickfeld zwischen den beiden Hubgerüsthälften hindurch erreichen läßt.It has proved to be useful in a reach truck with a between the towering mast halves towering in the transverse distance arranged vertical lifting cylinder for the fork Also, to arrange the lifting cylinder eccentrically between the frame halves and in particular the lifting cylinder in the displacement direction the mast continue to move laterally. To this Way can be visual obstruction of the driver through the lifting cylinder also reduce, with a comparatively large and optimally placed field of vision between the two Can reach mast halves through.

Eine weitere vorteilhafte Maßnahme besteht darin, das durch die seitliche Versetzung des Hubgerüstes bedingte Ungleichgewicht durch eine gegenüber bisheriger Plazierung 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.Another advantageous measure is that by the lateral displacement of the mast conditional imbalance by a shift compared to previous placement of weighty components of the truck in the sense of a compensate for lateral Radlastausgleichs in whole or in part. For example, the tank for the hydraulic oil, the hydraulic pump motor and / or valves to the left, by the created by a displacement of the mast to the right Balance imbalance 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 und
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 and
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 Radar arms 3, 4 extending to the rear on the outside, where the wheels 5 and 6 are stored. At the front end of the Stacker is a third wheel 7 is provided as the drive and Steering wheel is formed. On the vehicle frame 2 supports a largely open front cab 8 from, in the predominantly left of the longitudinal center plane 9 of the stacker 1 of transversely oriented driver's seat and right of the median longitudinal plane 9 also inclined with a transverse component steering column 11 are arranged with the steering wheel 12, as shown in FIG 3 am 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 influence of the seated driver are other controls for driving and for lifting operation of the Stacker 1 arranged, which are not shown in detail and described as they are well known and known for the understanding of the invention does not matter. The same applies to the drive device and the hydraulic Device for lifting and longitudinal displacement and possibly tilting the Load or the fork 13 with the tines pointing backwards 14 and 15, which are interconnected via a fork cross piece 16 are.

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 fork 13 at a standstill Reach truck 1, a carrier 17 is provided as a car is formed with rollers which face each other in a C-shaped Guide profiles 18, 19 on the inner sides of the wheel arms 3, 4 are guided.

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 via two laterally upstanding support plates 20, 21 connected to a mast 22, which consists essentially of a left mast half 23 and a right mast half 24 exists. The same mast halves 23 and 24 are at the upper end of the support plates 20, 21 to these coaxial articulated, with a limited inclinability in a known manner of the mast 22 by a few degrees forward and backward can be provided. The frameworks 23 and 24 are through Cross pieces connected to each other, in Figure 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 Figure 3, two double-T profiles 26, 27, which are opposite to a U-shaped guide 28 individually hydraulically extendable upwards. Into the mast 22 is also a hydraulic lifting cylinder 29 (Figure 2) integrated, a cylinder tube 30 and one opposite to this has telescopic rod 31 extendable above, at its upper End carries a deflection head 32, via which a not shown Chain is guided, whose one end is attached to a mounting block 33 is attached to the upper end of the cylinder tube 30 and the other end thereof at the mast halves 23, 24 guided load fork 13 is attached. Accordingly, the Load fork 13 raised during extension of the telescopic rod 31. A further lifting of the fork is done by hydraulic Raising the double-T profiles 26 and 27, to which also Hubketten (not shown) can be used. Accordingly is the mast 22 of the illustrated and described Embodiment 3 times extendable, which lifting 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 can be seen from Figures 2 and 3. According to FIG 3 is the outside of the right mast half 24th at a greater distance a to the longitudinal center plane 9, while the Outside of the left mast half 23 at a smaller distance b is located to the longitudinal center plane 9. Accordingly, the mast 22 offset laterally to the right. For example, at For a mast width of 700 mm, the center offset should 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 on the mast 22 to the same extent arranged back again laterally, so that the fork 13 is arranged symmetrically to the longitudinal center plane 9 and their both outer sides in each case the same distance c to the longitudinal center plane 9, as illustrated in FIG.

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-hand driver's seat the displacement of the mast 22 to the right makes it possible to to improve the driver's view to the rear. In Figure 3 are - starting from the eyes of the normal on the Driver's seat 10 seated driver associated beam point S - the two angular ranges L and L highlighted by hatching R drawn in which the mast 22 to the driver's view takes. Since the lifting cylinder 29 additionally in the direction of the right mast half 24 is offset, there is a comparatively large field of view between the two hidden Angular ranges L and R.

Die Darstellung in Figur 3 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 illustration in Figure 3 illustrates that the arrangement can be made so that from the driver's seat, the free ends Both forks 14, 15 can be seen. That corresponds to one compared to previous conditions improved visibility, the the driver's work and in particular the underrun of loads or pallets facilitated.

Claims (8)

  1. Reach truck comprising a vehicle frame (2) which is supported on the floor by at least three wheels (5 to 7), a traction and a steering device, which each act on at least one wheel (7), a driver's seat (10) supported on the vehicle frame (2), a carrier (17) which is designed as a wagon or carriage which can be displaced in the longitudinal direction with respect to the vehicle frame (2), and a lifting frame (22) which is arranged on the carrier (17) and can be extended upwards and which bears the load forks (13) pointing away from the driver's seat (10) rearward in the longitudinal direction, characterized in that the lifting frame (22) projects from the carrier (17) so as to be offset in the transverse direction with respect to the vertical longitudinal mid-plane (9) of the truck (1).
  2. Reach truck according to Claim 1 with a driver's seat (10) offset laterally with respect to the vertical longitudinal mid-plane (9), characterized in that 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 truck (1).
  3. Reach truck according to Claim 1 or 2,
    characterized in that the driver's seat (10) is aligned in the transverse direction.
  4. Reach truck according to one of Claims 1 to 3, characterized in that the load forks (13) are 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, characterized in that the lateral offsets of the lifting frame (22) with respect to the longitudinal mid-plane (9) and of the load forks (13) with respect to the lifting frame (22) are equally large, so that the load forks (13) are arranged centrally in relation to the truck (1).
  6. Reach truck according to one of Claims 1 to 5, with a vertical lifting cylinder (29) for the load forks (13), arranged between the halves (23, 24) of the lifting frame which project with a transverse spacing, characterized in that the lifting cylinder (29) is arranged off-centre between the halves (23, 24) of the lifting frame.
  7. Reach truck according to Claim 6, characterized in that the lifting cylinder (29) is offset further laterally in the direction of offset of the lifting frame (22).
  8. Reach truck according to one of Claims 1 to 7, characterized in that the imbalance caused by the lateral offset of the lifting frame (22) is completely or partly compensated for by a displacement, carried out with respect to previous placement, of weighty components of the truck (1) with the effect of compensating the wheel load between the two sides of 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
EP99107358.6A EP1046609B2 (en) 1999-04-21 1999-04-21 Lift truck with moveable mast
DE59908811T DE59908811D1 (en) 1999-04-21 1999-04-21 Reach truck

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

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

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DE (1) DE59908811D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8714311B2 (en) 2008-09-12 2014-05-06 Crown Equipment Corporation Monomast for a materials handling vehicle

Families Citing this family (1)

* 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

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8714311B2 (en) 2008-09-12 2014-05-06 Crown Equipment Corporation Monomast for a materials handling vehicle
US8851825B2 (en) 2008-09-12 2014-10-07 Crown Equipment Corporation Fork carriage apparatus for a materials handling vehicle
US10144626B2 (en) 2008-09-12 2018-12-04 Crown Equipment Corporation Fork carriage apparatus for a materials handling vehicle

Also Published As

Publication number Publication date
EP1046609B2 (en) 2017-07-19
DE59908811D1 (en) 2004-04-15
EP1046609A1 (en) 2000-10-25

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