EP2261168B1 - A telescopic fork - Google Patents

A telescopic fork Download PDF

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Publication number
EP2261168B1
EP2261168B1 EP10165634A EP10165634A EP2261168B1 EP 2261168 B1 EP2261168 B1 EP 2261168B1 EP 10165634 A EP10165634 A EP 10165634A EP 10165634 A EP10165634 A EP 10165634A EP 2261168 B1 EP2261168 B1 EP 2261168B1
Authority
EP
European Patent Office
Prior art keywords
slide
rollers
telescopic fork
fork according
movable slide
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
EP10165634A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2261168A1 (en
Inventor
Pier Franco Combina
Giuliano Rivoir
Maurizio Traversa
Vanni Ughetto
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.)
Eurofork Srl
Original Assignee
Eurofork 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 Eurofork Srl filed Critical Eurofork Srl
Publication of EP2261168A1 publication Critical patent/EP2261168A1/en
Application granted granted Critical
Publication of EP2261168B1 publication Critical patent/EP2261168B1/en
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
    • B66F9/14—Platforms; Forks; Other load supporting or gripping members laterally movable, e.g. swingable, for slewing or transverse movements
    • B66F9/141—Platforms; Forks; Other load supporting or gripping members laterally movable, e.g. swingable, for slewing or transverse movements with shuttle-type movement

Definitions

  • the present invention relates to an improved telescopic fork.
  • Telescopic forks are used in the automatic handling and industrial automation fields and are widely used, for example, in automatic warehouses, typically in association with pallet-moving translators/elevators.
  • the pallets may be stored on single-depth or double-depth shelving.
  • a telescopic fork is a machine that is composed of a lower fixed base and one or more superimposed, extensible elements which move in a bilateral, telescopic manner for the translation of loads.
  • the number of movable telescopic elements (two, three or four) is selected according to the overall travel to be achieved and the magnitude of the loads to be supported.
  • the fork comprises a lower fixed base 10 which has central vertical walls 11, 12 with two opposed surfaces from which a first set of rollers 13 with horizontal axes projects. These rollers engage an intermediate slide or extending member 20 in positions that are defined herein as transversely inner position.
  • a second, transversely outer set of rollers 14, coplanar with those of the first set, serves to support, in a telescopically slidable manner, a top slide 30 suitable for directly supporting the loads that are to be transferred, in operating conditions.
  • the top slide 30 has a substantially inverted-U-shaped cross-section with a pair of outer vertical flanges 36, 37 which are fixed to the sides of a horizontal plate 32.
  • a telescopic fork having the features recited in the preamble of claim 1 is known from US 4 016 984 A .
  • the object of the present invention is to provide a telescopic fork which is constructed in such a manner as to facilitate the insertion and the picking-up of the pallets. Another object of the invention is to improve the stability of the telescopic forks. A further object is to reduce and optimize overall dimensions.
  • a preferred embodiment of the telescopic fork comprises a lower base 10, an intermediate slide 20 which is movable telescopically relative to the base 10, and a top platform or slide 30 which in turn is movable telescopically relative to the intermediate slide 20.
  • the general telescopic constructional layout of the fork shown in Figures 1-3 can be considered generally known. Only the elements that are of specific importance and interest for the purposes of the implementation of the present invention will therefore be described in detail in the following description. For the implementation of the parts and elements that are not described in detail, reference may therefore be made to any known solution of a telescopic fork, for example, with regard to the actuations which bring about the sliding of the slides.
  • the fork may be constructed in the form of a fork comprising three or more movable slides.
  • the lower base 10 has a pair of vertical lateral flanges 11, 12 which are spaced uniformly transversely with respect to a central or median vertical plane P.
  • terms and expressions indicating orientations and relative positions such as “longitudinal”, “transverse”, “outer”, and “inner”, are intended to relate to the central vertical plane P and to the "longitudinal" direction of movement of the fork perpendicular to the plane of the drawing of Figure 1 .
  • the flanges 11, 12 extend from the opposite longitudinal sides of the base 10 and support a first set of rollers 13 with horizontal axes, which rollers project in a cantilever-like manner towards the central plane P from respective facing surfaces of the flanges 11, 12.
  • the rollers 13 engage for rolling in two guides in the form of lateral longitudinal cavities 21 of the intermediate slide 20.
  • the cavities 21 face in opposite, transversely outward directions and are formed by respective opposed C-shaped portions 22, 23.
  • the two lateral C-shaped portions are formed integrally with and are connected by a flattened central portion 24 which defines an upwardly open, U-shaped channel 25 which is delimited laterally by the C-shaped portions 22, 23 and at the bottom by the flattened portion 24.
  • Each of the two C-shaped portions 22, 23 has an upper series of aligned holes 27 which house the axles of a second set of rollers 14 with horizontal axes, which rollers project in a cantilever-like manner towards the central plane P from the respective facing surfaces of the C-shaped portions 22, 23.
  • the rollers 14 engage for rolling in respective guides in the form of lateral longitudinal cavities 31 of the top slide 30.
  • the cavities 31 face in transversely outward directions and are defined by the upper horizontal plate 32 and by two opposed L-shaped rails 33, 34 which project downwards from the plate 32.
  • the rails 33, 34 of the top slide 30 are housed in the U-shaped channel 25 of the intermediate slide 20.
  • the structure of the fork as a whole is symmetrical with respect to the vertical central plane P, in particular as far as the arrangement of the rollers is concerned.
  • a pyramidal configuration of the first and second sets of rollers 13 and 14, in which the rollers 14 which support the top slide 30 are arranged in more central positions than the rollers 13 of the first set which support the intermediate slide 20, can be seen from Figure 1 .
  • the rollers 13 which support the intermediate slide 20 are transversely farther from the central plane P than the rollers 14 that are interposed between the intermediate slide 20 and the top slide 30.
  • the rollers which support a given slide are transversely farther from the central vertical plane than the rollers that are interposed between that given slide and the slide above it.
  • the "pyramidal" arrangement of the rollers according to Figure 1 ensures greater stability of the slides and consequently of the load to be moved, since the transverse distance between the rollers of the first set is considerably increased.
  • the pyramidal arrangement is inverted: the lower rollers which support the intermediate slide are laterally farther in than those which support the top slide.
  • the fork of the present invention exhibits less lateral play, above all when the fork is in the extended or open condition.
  • a fork according to the invention has lateral play of about 2 mm in comparison with the conventional 4-5 mm.
  • top platform or slide 30 advantageously allows converging bevels 35 to be formed on the corners of the upper plate 32; the bevels facilitate the insertion of the slide in the pallet to be picked up without weakening the structure of the slide.
  • the lower rails 33, 34 which constitute the stiffening elements of the slide 30, are not affected by the bevels 35.
  • the top slide has a reduced height h in comparison with that of a conventional fork.
  • This reduction in the vertical dimension which is shown by a comparison of Figure 3 and 6 , reduces the chances of collisions with the shelving and with the pallets. The reduction in collisions lengthens the useful life of the equipment and consequently reduces maintenance costs.
  • the configuration of the intermediate slide permits the use of an optical monitoring unit for directly monitoring the position of the top slide.
  • an optical monitoring unit for directly monitoring the position of the top slide.
  • a reflector C fitted on the lower face of the top slide can be read directly by a photocell F which is mounted in a protected position on the lower base 10.

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)
  • Fluid-Damping Devices (AREA)
EP10165634A 2009-06-12 2010-06-11 A telescopic fork Not-in-force EP2261168B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000453A ITTO20090453A1 (it) 2009-06-12 2009-06-12 Forcola telescopica

Publications (2)

Publication Number Publication Date
EP2261168A1 EP2261168A1 (en) 2010-12-15
EP2261168B1 true EP2261168B1 (en) 2012-03-14

Family

ID=41508121

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10165634A Not-in-force EP2261168B1 (en) 2009-06-12 2010-06-11 A telescopic fork

Country Status (4)

Country Link
EP (1) EP2261168B1 (it)
CN (1) CN101920924B (it)
AT (1) ATE549289T1 (it)
IT (1) ITTO20090453A1 (it)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202017103231U1 (de) 2016-05-31 2017-06-29 Eurofork S.R.L. Teleskopische Gabel
IT202200010784A1 (it) 2022-05-24 2023-11-24 Eurofork S P A Perfezionamenti alle forcole telescopiche per la movimentazione di carichi nei magazzini automatizzati
IT202200010787A1 (it) 2022-05-24 2023-11-24 Eurofork S P A Forcola telescopica
IT202200010799A1 (it) 2022-05-24 2023-11-24 Eurofork S P A Coppia di forcole telescopiche
DE202024101224U1 (de) 2023-03-17 2024-04-08 Eurofork S.P.A. Anordnung zur Handhabung von Lasten in automatisierten Lagern mit eingebauter Verarbeitung von Daten, die Aufschluss über ihren Betriebszustand geben

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104153617B (zh) * 2014-07-28 2016-08-24 山东同力达智能机械有限公司 一种仓储类立体车库用搬运机器人
CN115010054B (zh) * 2022-06-27 2023-09-15 杭州海康机器人股份有限公司 一种托举伸缩叉

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3883022A (en) * 1972-09-21 1975-05-13 Oehler Wyhlen Lagertechnik Ag Load displacement apparatus
US4016984A (en) * 1975-08-28 1977-04-12 Eaton Corporation Shuttle assembly for a load handling apparatus
DE3145377C2 (de) * 1981-11-14 1989-12-14 Jungheinrich Unternehmensverwaltung Kg, 2000 Hamburg Gabelanordnung an einem Lastaufnahmemittel für Förderzeuge
JP3246642B2 (ja) * 1994-05-16 2002-01-15 特種製紙株式会社 段積みしたシート状包装体の自動ピッキング方法及び装置

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202017103231U1 (de) 2016-05-31 2017-06-29 Eurofork S.R.L. Teleskopische Gabel
IT202200010784A1 (it) 2022-05-24 2023-11-24 Eurofork S P A Perfezionamenti alle forcole telescopiche per la movimentazione di carichi nei magazzini automatizzati
IT202200010787A1 (it) 2022-05-24 2023-11-24 Eurofork S P A Forcola telescopica
IT202200010799A1 (it) 2022-05-24 2023-11-24 Eurofork S P A Coppia di forcole telescopiche
DE102023113464A1 (de) 2022-05-24 2023-11-30 Eurofork S.P.A. Verbesserungen an Teleskopgabeln für die Lasthandhabung in automatisierten Warenlagern
DE102023113382A1 (de) 2022-05-24 2023-11-30 Eurofork S.P.A. Teleskopgabel
DE202024101224U1 (de) 2023-03-17 2024-04-08 Eurofork S.P.A. Anordnung zur Handhabung von Lasten in automatisierten Lagern mit eingebauter Verarbeitung von Daten, die Aufschluss über ihren Betriebszustand geben
IT202300005112A1 (it) 2023-03-17 2024-09-17 Eurofork S P A Gruppo per la movimentazione di carichi nei magazzini automatizzati con elaborazione a bordo di dati indicativi del proprio stato di funzionamento

Also Published As

Publication number Publication date
ITTO20090453A1 (it) 2010-12-13
CN101920924A (zh) 2010-12-22
CN101920924B (zh) 2015-05-13
ATE549289T1 (de) 2012-03-15
EP2261168A1 (en) 2010-12-15

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