WO2012052702A1 - Empileurs de palettes automoteurs - Google Patents

Empileurs de palettes automoteurs Download PDF

Info

Publication number
WO2012052702A1
WO2012052702A1 PCT/GB2011/001468 GB2011001468W WO2012052702A1 WO 2012052702 A1 WO2012052702 A1 WO 2012052702A1 GB 2011001468 W GB2011001468 W GB 2011001468W WO 2012052702 A1 WO2012052702 A1 WO 2012052702A1
Authority
WO
WIPO (PCT)
Prior art keywords
lift mechanism
wheels
ground engaging
traction unit
self propelled
Prior art date
Application number
PCT/GB2011/001468
Other languages
English (en)
Inventor
David Paul Overfield
Simon Mark Brown
Original Assignee
Translift Bendi Limited
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.)
Filing date
Publication date
Application filed by Translift Bendi Limited filed Critical Translift Bendi Limited
Publication of WO2012052702A1 publication Critical patent/WO2012052702A1/fr

Links

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
    • B66F9/08—Masts; Guides; Chains
    • B66F9/10—Masts; Guides; Chains movable in a horizontal direction relative to truck
    • B66F9/105—Articulated, i.e. front chassis with wheels and mast rotatable relative to rear chassis with wheels

Definitions

  • the present invention relates to self propelled pallet stackers and in particular to pallet stackers which may, for example, be used for moving
  • Self propelled pallet stackers typically comprise a traction unit with a pair of ground engaging wheels, at least one of the wheels being driven.
  • Means, for example a tiller arm is provided by which the direction of movement of the traction unit may be controlled by a pedestrian.
  • the direction of movement of the traction unit may be controlled manually by the controlling pedestrian applying force to the tiller arm, to one side or the other.
  • sensors on the tiller arm may detect movements thereof by the controlling pedestrian and in turn control the orientation of the or each drive wheel to control the direction of movement of the traction unit.
  • a steering wheel may be used to control direction.
  • a lift mechanism is attached to the forward end on the traction unit, the lift mechanism having a pair of foot members which extend forwardly of the lift mechanism, one on either side of the lift mechanism. Wheels are provided adjacent the forward ends of the foot members, for supporting a load mounted on the lift mechanism. Because of the requirement to position the wheels on the foot members as far forwards as possible, in order to support the load mounted on the lift mechanism and prevent the lift truck from toppling forwards, the
  • a self propelled pallet stacker comprises a traction unit, the traction unit having a pair of rear nrni inri pnnaninn ⁇ Af hoolc nne roar «/hool hoinn mm in ton 1 r>n oanh ci Ho n-f the traction unit; and a lift mechanism, the lift mechanism having a pair of foot members extending forwardly of the lift mechanism in spaced apart relationship, a front ground engaging wheel being mounted on each of the foot members adjacent a front end of the foot member for rotation about a fixed horizontal axis, a pair of ground engaging castor wheels being mounted adjacent a rear end of the lift mechanism one on either side of the lift mechanism and a pair of lifting forks extending forwardly of the lift mechanism by which a pallet mounted on the forks may be moved vertically; the lift mechanism being connected to the traction unit by means of
  • the rear ground engaging wheels are located as far rearward of the traction unit as possible, so that the centre of gravity of the traction unit is forward of the rear wheels and is applied to the lift mechanism, through the universal coupling, intermediate of the front and castor wheels, thereby improving the fore/aft and lateral stability of the pallet stacker and increasing the loads that may be handled by the pallet stacker.
  • one or both of the rear wheels may be driven
  • additional castor wheels may be provided adjacent the rear of the lift mechanism.
  • the steering mechanism may comprise an electric motor mounted on the traction unit, the motor driving a gear which engages a steer pinion gear mounted on the end of the pivot remote from the universal coupling.
  • the drive motor may be controlled by sensors attached to a steering wheel or tiller arm mounted on the traction unit. Means may also be provided for manually controlling the speed and direction of the drive motor, braking the lift truck and controlling the lift mechanism.
  • the present invention is primarily concerned with pedestrian guided pallet stackers, a platform may however be provided at the rear of the traction unit, upon which the operator may ride and from which the operator may control the pallet stacker. Alternatively the operator may be sat or stood on the traction unit.
  • the forks of the lift mechanism may be provided with a pantograph or other form of reach mechanism or support arm, by which the forks may be moved horizontally of the lift mechanism.
  • Figure 1 is a diagrammatic illustration of a self propelled, pedestrian guided pallet stacker in accordance with the present invention
  • Figure 2 is a side elevation of the pallet stacker illustrated in figure 1 , on uneven ground
  • Figure 3 is a front elevation of the pallet stacker illustrated in figure 2;
  • Figure 4 is a part sectional plan view along the line IV-IV of figure 2.
  • Figure 5 is a diagrammatic illustration of the pallet stacker illustrated in figure 1 , manoeuvring.
  • a pallet stacker comprises a traction unit 10 having a pair of ground engaging rear wheels 1 2 mounted towards the rear of the traction unit 10 for rotation about fixed transverse axes.
  • Drive means for example electric or hydraulic motors (not shown) are provided for driving the rear wheels 1 2.
  • a power source for example storage batteries or a hydraulic pump . (not shown) are housed in the traction unit 10.
  • the various components which may include additional weights, are housed in the traction unit 1 0 so that the centre of gravity g is positioned forwardly if the transverse axes of the rear wheels 1 2.
  • a steering wheel 14 and control means 1 6 are provided adjacent the rear end of the traction unit 10 for actuation by an operator walking behind the traction unit 10.
  • An arm 20 extends forwardly from the front end of the traction unit 10.
  • a pivot tube 22 is secured to the end of the arm 20 remote from the traction unit 1 0, the pivot tube 22 extending vertically.
  • a pivot pin 24 is mounted in bearings in the pivot tube 22, the pivot pin 24 being secured at top and bottom to parallel extending limbs 26, 28 of a yoke 30, so that the yoke 30 is constrained to pivot with the pivot pin 24, about the pivot tube 22.
  • a gear 32 is also provided on the upper end of the pivot pin 24, the gear 32 engaging a drive gear 34 which is driven by a steering motor 36 to rotate the yoke 30.
  • a lifting mechanism 40 has a horizontally extending chassis 42 with a pair of ground engaging castor wheeis 44 mounted adjacent the rear cf the chassis 42, one on either side of the chassis 42.
  • the castor wheels 44 are freely rotatable about vertically extending axes.
  • a pair of legs 46 extend horizontally from the front end of the chassis 42 in spaced apart parallel relationship.
  • a ground engaging front wheel 48 is provided adjacent the forward end of each leg 46, the wheels 48 being mounted for rotation about fixed transverse horizontal axes.
  • the legs 46 may raise independently to improve ground clearance.
  • a vertically extending lift mast 50 is mounted on the chassis 42,
  • a pair of forks 52 is mounted in the mast 50 for movement vertically thereof. Means (not shown) is provided for moving the forks 52 up and down the mast 50.
  • the lower limb 28 of the yoke 30 is coupled to the chassis 42 by means of a universal joint formed by a block 54 located between the limb 28 and chassis 42, rearwardly of the lift mast 50.
  • the block 54 has two pairs of trunnions 56,58, a first pair of trunnions 56 extending coaxially from opposite parallel sides of the block 54 and the second pair of trunnions 58 extending coaxially from opposite parallel sides of the block 54 and disposed at 90° to the pair of trunnions 54.
  • the first set of trunnions 56 are mounted in bearings 60 secured to the limb 28 of yoke 30, while the second set of trunnions 58 are mounted in bearings 62 secured to the chassis 42, thereby Coupling the traction unit 1 0 to the lift mechanism 40 while permitting tilting of the lift mechanism 40 relative to the traction unit 1 0 about orthogonal horizontal axes.
  • the bearings 60 are secured to the limb 28 of yoke 30 on an axis which will coincide with the longitudinal axis of the pallet stacker when in the straight ahead position.
  • Bearings 62 are secured to the chassis 42 on an axis transverse to the axis of bearings 60, said transverse axis being intermediate of the castor wheels 44 and the lift mast 50, so that the traction unit 1 0 applies a load to the chassis 42 forward of the castor wheels 44.
  • the !ift mechanism 40 is driven by the traction unit 1 0 through the rear wheels 1 2.
  • the pallet stacker is manoeuvred by means of the steering wheel 14 which controls the steering motor 36 to pivot the yoke 30 and lift mechanism 40 coupled thereto, by up to 1 20 ° to either side of the straight ahead position.
  • the universal coupling between the traction unit 1 0 and the lift mechanism 40 allows the rear wheels 1 2, castor wheels 44 and front wheels 48 to remain in engagement with the ground, even on uneven ground .
  • the minimum aisle width in which the pallet stacker may operate depends on the distance "L" between the inside corner of a pallet 70 mounted on the lift mechanism 40 and the rearmost point on the chassis 42. Articulating the traction unit 10 with respect to the lift mechanism 40, in the manner of the present invention will reduce this distance, as compared with the conventional pallet stacker in which the components of the traction unit are mounted on the chassis 42.
  • the castor wheels 44 act to stabilise the pallet stacker in the fore/aft direction while the downward load applied to the chassis 42 forward of the castor wheels 44, by the traction unit 10, will stabilise the lift mechanism 40 laterally.
  • control means 1 6 may include means for controlling the speed of the pallet stacker and means for controlling the lift mechanism 40.
  • the rear wheels 1 2 are driven by independent motors so that they may be driven differentially when the pallet truck is turning.
  • the wheels 1 2 may be driven by a single motor through a differential unit.
  • only one of the rear wheels may be driven or an additional separate drive wheel may be provided on the traction unit 10.
  • the steering motor 36 may be drivingly connected to the pivot pin 24 by any suitable drive train, for example a chain drive.
  • the steering motor may be an electric or hydraulic motor.
  • the lift mechanism may be rotated about the pivot by means of hydraulic pistons or other suitable means.

Landscapes

  • 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)

Abstract

La présente invention se rapporte à un empileur de palettes automoteur comprenant une unité de traction possédant une paire de roues arrière en contact avec le sol, une roue arrière étant montée de chaque côté de l'unité de traction ; et un mécanisme de levage, le mécanisme de levage possédant une paire d'éléments-pieds s'étendant vers l'avant du mécanisme de levage selon une relation espacée, une roue avant en contact avec le sol montée de chaque côté des éléments-pieds de manière adjacente à une extrémité avant de l'élément-pied en vue d'une rotation autour d'un axe horizontal fixe, une paire de roues pivotantes en contact avec le sol montées de manière adjacente à une extrémité arrière du mécanisme de levage, une de chaque côté du mécanisme de levage, et une paire de fourches de levage s'étendant vers l'avant du mécanisme de levage grâce auquel une palette montée sur les fourches peut être déplacée à la verticale ; le mécanisme de levage étant relié à l'unité de traction au moyen d'un pivot s'étendant à la verticale, une extrémité du pivot étant fixée au mécanisme de levage par un accouplement universel dans une position située entre les roues avant en contact avec le sol et les roues pivotantes en contact avec le sol et un moyen destiné à faire tourner le mécanisme de levage autour du pivot s'étendant à la verticale par rapport à l'unité de traction, afin de diriger l'empileur de palettes.
PCT/GB2011/001468 2010-10-20 2011-10-12 Empileurs de palettes automoteurs WO2012052702A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1017775.6 2010-10-20
GBGB1017775.6A GB201017775D0 (en) 2010-10-20 2010-10-20 Self propelled pallet stackers

Publications (1)

Publication Number Publication Date
WO2012052702A1 true WO2012052702A1 (fr) 2012-04-26

Family

ID=43334156

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2011/001468 WO2012052702A1 (fr) 2010-10-20 2011-10-12 Empileurs de palettes automoteurs

Country Status (2)

Country Link
GB (1) GB201017775D0 (fr)
WO (1) WO2012052702A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2626428C1 (ru) * 2016-08-22 2017-07-27 Александр Поликарпович Лялин Штабелеукладчик
CN107879291A (zh) * 2017-12-31 2018-04-06 荣成中磊石材有限公司 一种中心摆移调位货叉

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3039268A (en) * 1957-11-25 1962-06-19 Towmotor Corp Hydraulic system for narrow aisle lift truck
US6089354A (en) * 1997-06-16 2000-07-18 Palfinger Crayler Staplertechnik Gmbh Forklift
US20030209371A1 (en) * 2000-10-27 2003-11-13 Brown Frederick Lesley Lift truck
EP2184255A1 (fr) * 2008-11-10 2010-05-12 Frederick Leslie Brown Chariots élévateurs autopropulsés

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3039268A (en) * 1957-11-25 1962-06-19 Towmotor Corp Hydraulic system for narrow aisle lift truck
US6089354A (en) * 1997-06-16 2000-07-18 Palfinger Crayler Staplertechnik Gmbh Forklift
US20030209371A1 (en) * 2000-10-27 2003-11-13 Brown Frederick Lesley Lift truck
EP2184255A1 (fr) * 2008-11-10 2010-05-12 Frederick Leslie Brown Chariots élévateurs autopropulsés

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2626428C1 (ru) * 2016-08-22 2017-07-27 Александр Поликарпович Лялин Штабелеукладчик
CN107879291A (zh) * 2017-12-31 2018-04-06 荣成中磊石材有限公司 一种中心摆移调位货叉
CN107879291B (zh) * 2017-12-31 2023-08-01 荣成中磊科技发展有限公司 一种中心摆移调位货叉

Also Published As

Publication number Publication date
GB201017775D0 (en) 2010-12-01

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