EP2128076B1 - Agencement de levage pour un chariot de manutention - Google Patents

Agencement de levage pour un chariot de manutention Download PDF

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Publication number
EP2128076B1
EP2128076B1 EP20090005663 EP09005663A EP2128076B1 EP 2128076 B1 EP2128076 B1 EP 2128076B1 EP 20090005663 EP20090005663 EP 20090005663 EP 09005663 A EP09005663 A EP 09005663A EP 2128076 B1 EP2128076 B1 EP 2128076B1
Authority
EP
European Patent Office
Prior art keywords
eccentric
lifting
load
fork
lifting carriage
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.)
Not-in-force
Application number
EP20090005663
Other languages
German (de)
English (en)
Other versions
EP2128076A1 (fr
Inventor
Patrick Streiff
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Still SpA
Original Assignee
Om Carrelli Elevatori SpA
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by Om Carrelli Elevatori SpA filed Critical Om Carrelli Elevatori SpA
Publication of EP2128076A1 publication Critical patent/EP2128076A1/fr
Application granted granted Critical
Publication of EP2128076B1 publication Critical patent/EP2128076B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B66F9/12—Platforms; Forks; Other load supporting or gripping members
    • B66F9/16—Platforms; Forks; Other load supporting or gripping members inclinable relative to mast
    • 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 lifting arrangement for an industrial truck with a along a mast by means of guide rollers up and down movably guided lifting carriage on which a fork is attached, which is aligned in the unloaded state substantially parallel to a road surface and the elastic by the weight of a recorded load is deformable, wherein at least one guide roller is adjustably mounted on the lifting carriage, such that the position of the lifting relative to the mast is automatically changed due to the weight of a recorded load, so that an elastic deformation of the fork is at least partially compensated or overcompensated, wherein the at least an adjustable guide roller is mounted by means of an eccentric on the lifting and a spring element is provided which predetermines the position of the lifting relative to the mast with not loaded forklift.
  • Industrial trucks are vehicles for in-house transport of goods, which are usually used for transporting and stacking goods on pallets or in lattice boxes.
  • the fork is attached to a lifting carriage, which can be raised and lowered along a mast.
  • the lifting slide on guide rollers, which are guided in a profile of the mast.
  • an upper pair of guide rollers and a lower pair of guide rollers are provided.
  • the two roles of a pair of guide rollers are usually arranged coaxially to each other.
  • the load fork and the lifting carriage can be formed here by separate components or by a common component.
  • the inclination of the fork is usually not actively adjustable.
  • the fork in the unloaded state slightly inclined upwards.
  • this inclination of the forklift upward makes it difficult to retract the unloaded forklift into a pallet or lattice box.
  • the lifting arrangement comprises a liftable in a mast lifting, the lower guide rollers are mounted in each case an eccentric on the lifting.
  • the eccentrics are each provided with a forward-pointing lever arm.
  • the lever arms of the two eccentrics are articulated to a cross between the two eccentrics arranged crossbar.
  • On the crossbar lower ends are supported by compression springs which engage with the upper ends of a transverse plate of the lifting carriage.
  • the compression springs act on the eccentric by means of a lever arm against a stop of the lifting carriage. At the crossbar load chains are still articulated.
  • the present invention has for its object to provide a lifting arrangement for a truck available, with the undesirable inclination of the fork is avoided in a simple manner.
  • the spring element is supported on the one hand on the lifting carriage and on the other hand acts directly on the eccentric and a traction means of the mast acts on the eccentric and is secured to the eccentric.
  • the adjustable guide roller - or the adjustable guide roller pair - changes its position relative to the lifting depending on from the weight of a load on the fork. This is done by a mechanical force deflection. The greater the weight of a load on the forklift, the more the lift tilts backwards - the tips of the forks of the forks thereby move upward, counter to the direction of elastic deformation by the weight of the load.
  • at least one adjustable guide roller is mounted on the lifting carriage by means of an eccentric.
  • the spring element indicates the position of the lifting relative to the mast with unloaded fork.
  • the spring element biases the lifting carriage into a position in which the tines of the unloaded load fork are substantially horizontal.
  • the spring element acts between the lifting and the eccentric, wherein it holds the eccentric in an end position.
  • the spring element engages on the one hand on the lifting and on the other hand on the eccentric.
  • the spring element exerts a force on the eccentric and is supported on the lifting carriage.
  • the mast has two traction means, wherein a traction means acts on each of the two eccentrics and thus on both guide rollers of the pair of guide rollers.
  • the eccentric is rotatably mounted in this case according to an advantageous embodiment of the invention about a first eccentric axis on the lifting and the guide roller is rotatably mounted about a second eccentric axis on the eccentric, wherein the first eccentric axis and the second eccentric axis are spaced apart in parallel.
  • the spring element is arranged such that the weight force of a load located on the load fork causes an elastic deformation of the spring element.
  • the eccentric is moved by the weight against the force of the spring element out of its final position.
  • a part of the surface of the eccentric is designed as a rolling surface for the traction means.
  • a smaller or larger section of the traction means engages the rolling surface.
  • the rolling surface can be formed, for example, as a part-circular path, whose central axis is the first eccentric axis. This ensures that the lever arm, with the the force of the traction means acting on the eccentric, regardless of the rotational position of the eccentric is always the same.
  • the eccentric has a first, preferably adjustable stop, which determines the position of the eccentric with unloaded fork. This first stop comes with unloaded fork on a component of the lifting or on a component of the fork to the plant.
  • the eccentric on a second, preferably adjustable stop, which determines the position of the eccentric at maximum laden fork.
  • the second stop is at maximum laden fork on a component of the lifting or on a component of the fork to the plant.
  • FIG. 1 shows a generic, designed as a pedestrian-controlled stacker truck.
  • the truck has a drive part with a steerable drive wheel 11.
  • the drive wheel 11 can be steered by pivoting a steering arm 12 about a vertical axis.
  • the truck On the load side, the truck has two non or only slightly height adjustable wheel arms 13, each with a roller 14th
  • a hoist of the truck comprises an upwardly telescopically extendable mast 15.
  • a lifting 16 is guided with a pair of lower guide rollers 17 and a pair of upper guide rollers 18 in a profile of the mast 15.
  • On the lifting 16 a fork 19 is attached, which is moved together with the lifting 16 up and down.
  • In the illustrated lower end position of the forks 17 are a U-shaped profile having forks lowered the fork 17 on the wheel arms 13 and enclose the wheel arms 13 from above.
  • Dashed lines show the lifting carriage 16a, the lower guide rollers 17a, the upper guide rollers 18a and the load fork 19a in a raised position.
  • a storage rack 20 is shown with two pallets 21 parked therein. It can be seen how, by moving the truck according to the right in the drawing, the fork 19 can be moved into the lower or in the upper pallet.
  • the forks of the unloaded fork 19 are aligned parallel to the road surface and thus parallel to the entry openings of the pallets 21. Adjusting the height of the fork 19 and the retraction of the fork 19 in the pallet is particularly simple.
  • FIG. 2 shows the lifting arrangement according to the invention in the unloaded state.
  • the forks of the fork 19 parallel to the road.
  • the plane defined by the center axes of the guide rollers 17, 18 is perpendicular to the fork tines 19.
  • the lower guide rollers 17 are mounted directly on the lifting carriage 16.
  • the upper guide rollers 18, however, are mounted on an eccentric 1, which in turn is rotatably mounted on the lifting carriage 16.
  • a designed as a load chain traction means 2 which receives the weight of the fork 19, engages the eccentric 1 at.
  • the eccentric 1 is rotatably mounted on the lifting carriage 16 on a first eccentric axis 3.
  • the guide roller 18 is mounted on the eccentric 1.
  • the two eccentric axes 3, 4 are exactly above the other at a distance D.
  • This position of the eccentric 1 is defined by a first stop 5, which is fixed to the eccentric 1 and rests against a component of the lifting carriage 16. In this position, the eccentric 1 is held by a spring element 7, which is supported on the lifting carriage 16 and exerts on the eccentric 1 a torque in the counterclockwise direction.
  • the traction means 2 also acts on the eccentric 1, is deflected on a rolling surface of the eccentric 1 and is then guided in the mast 15 upwards.
  • the force acting on the traction means 2 tensile force, the size of which depends on the weight of a load located on the fork 19, exerts on the eccentric 1 a torque in a clockwise direction.
  • the torque applied by the traction means 2 is smaller than the torque applied by the spring element 7, so that the eccentric 1 is in the end position defined by the stop 5.
  • FIGS. 4 and 5 the same arrangement is shown with a load located on the fork 19 load 30.
  • the force exerted by the traction means 2 on the eccentric 1 torque is now so large that the eccentric 1 is rotated counter to the force of the spring element 7 in the clockwise direction until the second stopper 6 comes to rest on the lifting 16.
  • the first eccentric axis 3, which connects the eccentric 1 with the lifting slide 16, is now offset to the left in the drawing relative to the second eccentric axis 4.
  • the lifting 16 and the fork 19 are hereby pivoted in total counterclockwise, so that the tips of the forks are offset upwards.
  • the loaded fork 19 is therefore tilted backwards.
  • the elastic deformation of the lifting assembly is balanced due to the weight of the load 30 and even slightly overcompensated.
  • the deflection of the eccentric 1 is dependent on the weight of the load located on the fork 19 load. In the case of moderate load, the position of the eccentric 1 adjusts to a position between the end positions defined by the stops 5, 6.
  • the stops 5, 6 are adjustable, so that the horizontal position and the maximum inclination of the fork 19 can be adjusted during assembly of the lifting arrangement.

Claims (8)

  1. Agencement de levage pour un chariot de manutention comprenant un chariot de levage (16) guidé de manière déplaçable de haut en bas le long d'une structure de levage (15) au moyen de rouleaux de guidage (17, 18), sur lequel est fixée une fourche de charge (19) qui est orientée dans l'état non chargé essentiellement parallèlement à une surface de la chaussée et qui peut être déformée élastiquement sous l'effet du poids d'une charge reçue (30), au moins un rouleau de guidage (18) étant monté de manière déplaçable sur le chariot de levage (16), de telle sorte que la position du chariot de levage (16) par rapport à la structure de levage (15) puisse être modifiée automatiquement en fonction du poids d'une charge reçue (30), de sorte qu'une déformation élastique de la fourche de charge (19) puisse être au moins partiellement compensée ou surcompensée, l'au moins un rouleau de guidage réglable (18) étant monté au moyen d'un excentrique (1) sur le chariot de levage (16) et un élément de ressort (7) étant prévu, lequel, lorsque la fourche de charge (19) n'est pas chargée, prédéfinit la position du chariot de levage (16) par rapport à la structure de levage (15), caractérisé en ce que l'élément de ressort (7) est d'une part supporté sur le chariot de levage (16) et vient en prise d'autre part directement avec l'excentrique (1) et un moyen de traction (2) de la structure de levage (15) vient en prise également avec l'excentrique (1) et est fixé à l'excentrique (1).
  2. Agencement de levage selon la revendication 1, caractérisé en ce que l'excentrique (1) est monté à rotation autour d'un premier axe d'excentrique (3) sur le chariot de levage (16) et le rouleau de guidage (18) est monté à rotation autour d'un deuxième axe d'excentrique (4) sur l'excentrique (1), le premier axe d'excentrique (3) et le deuxième axe d'excentrique (4) pouvant être espacés l'un de l'autre en parallèle.
  3. Agencement de levage selon la revendication 1 ou 2, caractérisé en ce que l'élément de ressort (7) est disposé de telle sorte que le poids d'une charge (30) se trouvant sur la fourche de charge (19) provoque une déformation élastique de l'élément de ressort (7).
  4. Agencement de levage selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'une partie de la surface de l'excentrique (1) est réalisée sous forme de surface de roulement pour le moyen de traction (2).
  5. Agencement de levage selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'excentrique (1) présente une première butée (5) de préférence réglable, qui fixe la position de l'excentrique (1) lorsque la fourche de charge (19) n'est pas chargée.
  6. Agencement de levage selon la revendication 5, caractérisé en ce que la première butée (5), lorsque la fourche de charge (19) n'est pas chargée, vient en appui contre un composant du chariot de levage (16) ou contre un composant de la fourche de charge (19).
  7. Agencement de levage selon l'une quelconque des revendications 1 à 6, caractérisé en ce que l'excentrique (1) présente une deuxième butée (6), de préférence réglable, qui fixe la position de l'excentrique (1) lorsque la fourche de charge (19) est chargée au maximum.
  8. Agencement de levage selon la revendication 7, caractérisé en ce que la deuxième butée (6), lorsque la fourche de charge (19) est chargée au maximum, vient en appui contre un composant du chariot de levage (16) ou contre un composant de la fourche de charge (19).
EP20090005663 2008-05-30 2009-04-22 Agencement de levage pour un chariot de manutention Not-in-force EP2128076B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810026130 DE102008026130A1 (de) 2008-05-30 2008-05-30 Hubanordnung für ein Flurförderzeug

Publications (2)

Publication Number Publication Date
EP2128076A1 EP2128076A1 (fr) 2009-12-02
EP2128076B1 true EP2128076B1 (fr) 2014-05-07

Family

ID=41020850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20090005663 Not-in-force EP2128076B1 (fr) 2008-05-30 2009-04-22 Agencement de levage pour un chariot de manutention

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EP (1) EP2128076B1 (fr)
DE (1) DE102008026130A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3083853A (en) 1960-06-06 1963-04-02 Clark Equipment Co Load engaging apparatus for lift trucks
DE3840748A1 (de) * 1988-12-03 1990-06-07 Dickertmann Ag Vorrichtung zum einstellen von lastaufnehmenden gabelzinken in eine schraeg nach oben gerichtete tragstellung
DE19525723A1 (de) * 1995-07-14 1997-01-16 Linde Ag Flurförderzeug mit einem Hubgerüst

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Publication number Publication date
DE102008026130A1 (de) 2009-12-03
EP2128076A1 (fr) 2009-12-02

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