EP1880973A2 - Gabelstapler - Google Patents

Gabelstapler Download PDF

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Publication number
EP1880973A2
EP1880973A2 EP07111589A EP07111589A EP1880973A2 EP 1880973 A2 EP1880973 A2 EP 1880973A2 EP 07111589 A EP07111589 A EP 07111589A EP 07111589 A EP07111589 A EP 07111589A EP 1880973 A2 EP1880973 A2 EP 1880973A2
Authority
EP
European Patent Office
Prior art keywords
upright
truck
frame
support means
work plane
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.)
Withdrawn
Application number
EP07111589A
Other languages
English (en)
French (fr)
Other versions
EP1880973A3 (de
Inventor
Franco Restelli
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.)
GL Locatelli Srl
Original Assignee
GL Locatelli Srl
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 GL Locatelli Srl filed Critical GL Locatelli Srl
Publication of EP1880973A2 publication Critical patent/EP1880973A2/de
Publication of EP1880973A3 publication Critical patent/EP1880973A3/de
Withdrawn legal-status Critical Current

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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
    • B66F9/08—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
    • B66F9/07559—Stabilizing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks

Definitions

  • the present invention relates to a lift truck.
  • the invention applies to handling of containers, palletised goods, paper reels or fabric rolls and the like, disposed by way of example on shelves placed inside warehouses or on the ground.
  • lift trucks comprise a frame moving inside the warehouse.
  • the frame comprises at least three wheels at least one of which is a rotatable wheel, and at least one motor to allow movement of the frame.
  • Trucks of known type further comprise an upright that is slidable relative to the frame in a direction parallel to a work plane.
  • the upright is movable between a first operating position at which it is retracted relative to the frame, and a second operating position, during loading and unloading of the goods, at which the upright is drawn out at least partly relative to the frame.
  • trucks of known type comprise grip means to grasp the load.
  • This means is vertically movable and can reach locations at different heights.
  • the grip means comprises either a fork to grasp the containers or palletised goods, or pliers.
  • the upright fully rests on the work plane through at least three support points. Preferably, the upright rests thereon through four support points.
  • the upright is associated with the frame so that it can be guided during movement from the first operating position to the second operating position and vice versa.
  • Known lift trucks comprise suitable balance weights for balancing the upright and frame.
  • the lift trucks comprise a trolley that is drawn out when the upright is in its second operating position and carries a load. In this step, the trolley is drawn out so as to balance the action of the load weight.
  • the truck in order to prevent overturning of the upright or of the whole lift truck, the truck must necessarily be provided with said balance weights and the trolley so as to make the extractable lift truck of known type heavier.
  • the present invention aims at providing a lift truck solving the above mentioned drawbacks.
  • a lift truck in accordance with the invention has been generally identified with reference numeral 1.
  • Truck 1 comprises a frame 2 movable in a work plane "P".
  • Frame 2 constitutes a main portion of truck 1 and comprises a bearing structure 3 inside which at least one motor (not shown in the figures) is contained, said motor enabling movement of frame 2 in the work plane "P".
  • the movable frame 2 comprises at least three wheels (not shown in the figures) defining at least three supports on the work plane "P".
  • at least one of said wheels is a steering wheel to allow frame 2 to follow curved trajectories.
  • at least one of the wheels is connected to the motor for operation.
  • frame 2 has a niche 4 defined by two parallel side walls 5 facing each other and by a central shoulder 6 connecting the two walls 5.
  • Truck 1 further comprises an upright 7 slidably associated with frame 2.
  • the upright 7 is housed in the frame niche 4.
  • the upright 7 is movable between a first operating position at which it is located close to the frame shoulder 6 and is fully contained in the frame niche 4, and a second operating position at which it is moved away from the shoulder 6 of frame 2 and is partly outside said niche 4.
  • the first operating position corresponds to a movement step of the whole lift truck 1 until a desired location
  • the second operating position corresponds to a step of loading and/or unloading the goods.
  • the upright 7 comprises a first pair of parallel longitudinal members 8 associated with frame 2 and a second pair of longitudinal members 9 telescopically coupled to the first pair 8.
  • Suitable actuating means (not shown) enables translation of the second pair of longitudinal members 9 relative to the first pair 8.
  • the upright 7 comprises a base 10 consisting of two parallel rods 11 disposed along a direction substantially parallel to the work plane "P".
  • Each rod 11 comprises a first end 11a linked to the first pair of longitudinal members 9.
  • the lift truck 1 further comprises grip means 12 slidably associated with the upright 7 to grasp a load.
  • the grip means 12 comprises a fork 13 slidably secured to the second pair of longitudinal members 9 of the upright 7 to grasp an item or a plurality of items supported by a pallet.
  • the fork 13 can comprise flat prongs for transport of palletised goods or tubular prongs for getting hold of roll-shaped goods.
  • the grip means 12 comprises a fork 13 with tubular prongs while a further fork 13 with flat prongs can be disposed on top of it or fitted thereon.
  • the upright 7 further comprises means 14 for direct support on the work plane "P". More specifically, the direct-support means 14 lies within the plan of the upright 7 and preferably inside the plan development of niche 4.
  • the direct-support means 14 comprises rolling means 15 connected to upright 7 and brought into contact with the work plane "P".
  • the rolling means 15 comprises a plurality of rollers 16 disposed with the respective rotation axis parallel to the work plane "P".
  • said rollers 16 are disposed close to a second end 11b of rods 11 constituting the upright base 10.
  • the lift truck 1 further comprises indirect-support means 17 included in the upright plan of the upright 7, preferably inside the plan development of niche 4, and connecting upright 7 with frame 2.
  • the indirect-support means 17 comprises two preferably rectilinear racks 18 connected to frame 2.
  • the indirect-support means 17 comprises a rack 18 fastened to each wall 5 defining niche 4 of frame 2.
  • the two racks 18 are parallel to each other and are located at the same height.
  • the indirect-support means 17 comprises a respective upper wheel 19, which is preferably smooth, and a respective lower wheel that is toothed.
  • the upper wheel 19 and lower toothed wheel 26 are each connected to upright 7 and are associated with the respective rack 18.
  • This weight portion is then discharged onto the work plane "P" through said frame wheels.
  • at least one portion of the upright 7 weight and the weight of the load possibly transported is discharged onto the work plane "P" in an indirect manner.
  • the indirect-support means 17 further comprises a crosspiece 20 connecting upright 7 to wheels 19 and/or 26. More specifically, the crosspiece 20 is fastened to the first pair of longitudinal members 9.
  • the crosspiece 20 further comprises guide means 21 acting on racks 18 to facilitate sliding of crosspiece 20 relative to frame 2.
  • the guide means 21 comprises a pair of parallel plates 22 between which the respective rack 18 is housed.
  • a motor 23 is associated with the indirect-support means 17 to allow rotation of the toothed wheels 26 and/or the upper wheels 19 in racks 18 and thus enable movement of upright 7 relative to frame 2.
  • the motor is associated with one of the toothed wheels 26.
  • the indirect-support means 17 is movable relative to frame 2 and can have a plurality of distinct configurations. In this way, the distance between the upright 7 and shoulder 6 of frame 2 can continuously vary.
  • the lift truck 1 further comprises stabilisation means 24 acting on the upright 7 when starting of an overturning stress applied to the upright 7 itself occurs.
  • the stabilisation means 24 comprises means 25 for detecting rotation of upright 7 relative to frame 2.
  • This detecting means 25 comprises a sensor (not shown in the figures) associated with at least one of the racks 18.
  • this sensor consists of a roller with a spring (not shown in the figures) brought into contact with rack 18.
  • the detecting means 25 comprises a sensor (not shown) associated with the direct-support means 14, alternatively or in addition to the sensor associated with rack 18.
  • the sensor associated with the direct-support means 14 is located in one or more of rollers 16 and checks the ceased contact of rollers 16 with the work plane "P".
  • the detecting means 25 senses an anomalous rotation of the upright 7 relative to frame 2 and immediately generates a signal activating an alarm device not shown. In addition, the detecting means 25 also generates a signal that will stop motor 23 associated with the indirect-support means 17 and the motor associated with frame 2.
  • the stabilisation means 24 can further comprise one or more mechanical detents on which at least part of the upright 7 abuts at a predetermined critical rotation angle.
  • these mechanical detents can consist of prismatic blocks substantially corresponding with plates 22 of the guide means 21.
  • the lift truck 1 further comprises means 27 for lifting the direct-support means 14 acting when the upright 7 is in the first operating position.
  • the lifting means 27 acts on the direct-support means 14 when the lift truck 1 is moved on the work plane "P".
  • This lifting means 27 stops contact between the plurality of rollers 16 and the work plane "P" to facilitate movement of truck 1.
  • the lifting means 27 comprises at least one hydraulic ram 28 connected to the crosspiece 20.
  • ram 28 by its engagement with abutment means not shown, promotes a limited rotation of the upright 7 as far as contact between the direct-support means 14 and work plane "P" stops.
  • frame 2 has two niches 4 in which two distinct uprights 7 are housed, which uprights 7 can operate jointly or separately. In this way, the lift truck 1 can simultaneously reach several distinct positions.
  • the present invention achieves the intended aims and has important advantages.
  • truck 1 since the lift truck 1 comprises said indirect-support means 17 of the upright 7 contained in the plan of the upright 7 itself, truck 1 has a limited requirement for balance weights. In this manner, the overall weight of the lift truck 1 is reduced as compared with trucks of the known art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Vehicle Step Arrangements And Article Storage (AREA)
  • Forklifts And Lifting Vehicles (AREA)
EP07111589A 2006-07-21 2007-07-03 Gabelstapler Withdrawn EP1880973A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI20061427 ITMI20061427A1 (it) 2006-07-21 2006-07-21 Carrello elevatore

Publications (2)

Publication Number Publication Date
EP1880973A2 true EP1880973A2 (de) 2008-01-23
EP1880973A3 EP1880973A3 (de) 2009-05-13

Family

ID=38581906

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07111589A Withdrawn EP1880973A3 (de) 2006-07-21 2007-07-03 Gabelstapler

Country Status (2)

Country Link
EP (1) EP1880973A3 (de)
IT (1) ITMI20061427A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009014951A1 (de) * 2009-03-30 2010-10-14 Finkbeiner, Gerhard, Dipl.-Ing. Hebevorrichtung, insbesondere mobile Hebevorrichtung
CN108609538A (zh) * 2018-06-22 2018-10-02 昆山华恒工程技术中心有限公司 Agv车
JP2019014574A (ja) * 2017-07-07 2019-01-31 三菱ロジスネクスト株式会社 移載装置および荷役車両

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1026794A (en) * 1962-02-26 1966-04-20 Rudolf Hauser Improvements in or relating to lift trucks
DE1431709A1 (de) * 1964-03-24 1968-12-05 Lansing Bagnall Ltd Industrielader
US4921075A (en) * 1989-02-21 1990-05-01 Teledyne Princeton, Inc. Fork lift

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1026794A (en) * 1962-02-26 1966-04-20 Rudolf Hauser Improvements in or relating to lift trucks
DE1431709A1 (de) * 1964-03-24 1968-12-05 Lansing Bagnall Ltd Industrielader
US4921075A (en) * 1989-02-21 1990-05-01 Teledyne Princeton, Inc. Fork lift

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009014951A1 (de) * 2009-03-30 2010-10-14 Finkbeiner, Gerhard, Dipl.-Ing. Hebevorrichtung, insbesondere mobile Hebevorrichtung
CN102387980A (zh) * 2009-03-30 2012-03-21 格哈特·芬克贝纳 提升设备，特别是移动提升设备
CN102387980B (zh) * 2009-03-30 2014-12-03 格哈特·芬克贝纳 提升设备，特别是移动提升设备
JP2019014574A (ja) * 2017-07-07 2019-01-31 三菱ロジスネクスト株式会社 移載装置および荷役車両
CN108609538A (zh) * 2018-06-22 2018-10-02 昆山华恒工程技术中心有限公司 Agv车
CN108609538B (zh) * 2018-06-22 2024-05-17 昆山华恒工程技术中心有限公司 Agv车

Also Published As

Publication number Publication date
ITMI20061427A1 (it) 2008-01-22
EP1880973A3 (de) 2009-05-13

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