EP0000295B1 - Chariot élévateur perfectionné - Google Patents

Chariot élévateur perfectionné Download PDF

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Publication number
EP0000295B1
EP0000295B1 EP78400003A EP78400003A EP0000295B1 EP 0000295 B1 EP0000295 B1 EP 0000295B1 EP 78400003 A EP78400003 A EP 78400003A EP 78400003 A EP78400003 A EP 78400003A EP 0000295 B1 EP0000295 B1 EP 0000295B1
Authority
EP
European Patent Office
Prior art keywords
mast
chassis
lift truck
load
truck according
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
Application number
EP78400003A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0000295A1 (fr
Inventor
Georges Itey-Bernard
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.)
Regie Nationale des Usines Renault
Original Assignee
Regie Nationale des Usines Renault
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 Regie Nationale des Usines Renault filed Critical Regie Nationale des Usines Renault
Publication of EP0000295A1 publication Critical patent/EP0000295A1/fr
Application granted granted Critical
Publication of EP0000295B1 publication Critical patent/EP0000295B1/fr
Expired 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
    • B66F9/065—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 non-masted
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S414/00—Material or article handling
    • Y10S414/13—Handlers utilizing parallel links

Definitions

  • the present invention relates to a forklift of the type comprising a chassis, a mast which can be lifted relative to the chassis, a cylinder for controlling the lifting and lowering of the mast, a load-carrying plate secured to the mast, a hinge pin carried by the base of the mast and which is integral with a movable slide guided horizontally on the chassis.
  • US patent A-1 623 194 discloses an orientable loading device mounted on rails which maneuvers a stationary shovel excavator. The overhang of the load is here permanent during the work of the machine regardless of its orientation.
  • US-A-2 310 284 describes a loading shovel adaptable to a crawler tractor whose lifting cylinder guides all of the shovel support arms between horizontal and vertical beams.
  • the main object of the invention is therefore a lift truck with improved stability in which all of the means designed to improve the stability of the truck do not in any way modify the size of the truck or its mass.
  • the invention also relates to a forklift whose arrangement of the lifting device allows a significant improvement in visibility.
  • the invention also relates to a forklift whose organs of the lifting device occupy a position favorable to the reduction of the masses located at the front of the drive axle, to the lowering of the center of gravity, and to the increased driver's visual field.
  • the base of the lifting mast carries a hinge pin secured to a slide mounted in longitudinal translation at the lower part of the chassis of the carriage under the action of a control means.
  • the lifting mast can occupy any inclined position, a substantially horizontal position, and its center of gravity is located between the axles of the truck, which greatly increases its static balance and the visual field of the driver.
  • the trolley is rendered insensitive to the dynamic forces generated as a result of its acceleration or deceleration.
  • the carriage shown in FIGS. 1 and 2 comprises a chassis 1, drive wheels 2, steerable or drive wheels 3 forming part of two axles respectively located at the front and at the rear of the carriage.
  • the chassis 1 essentially comprises at its base, two lateral beams 5, 6 which support a connecting plate 7 and which are braced by three crosspieces 8, 9, 10.
  • Each beam extends between the front and rear wheels 2, 3 and is composed of a "1" profile with horizontal wings oriented towards the longitudinal axis of the carriage.
  • the wings of the two aforementioned sections constitute raceways as will be seen below.
  • Two vertical uprights 11, 12 are integral with each spar 5 and 6.
  • the front uprights 11 support the axis of the driving axle, while the rear uprights 12 anchor the two bodies of jacks whose role we will examine more far.
  • a number of ribs give the chassis the rigidity and resistance necessary to absorb the overturning torque of the carriage and the reaction force of the control cylinder.
  • the drawing shows schematically the control battery 13 of the drive motor 14, the oil tank 15, the counterweight 16, part of the driver's protective casing and the steering mechanism 17.
  • the lifting device shown in more detail in Figure 1, essentially comprises at least one lifting mast 19 constituted, for example, by a beam resistant to torsional and bending forces.
  • the end of the mast carries a load-carrying plate constituted by a fork 20 with variable spacing, supported by two crosspieces 21 and 22, connected by gussets 23, and which extend transversely to the longitudinal axis of the carriage.
  • the length of the crosspieces 21, 22 is substantially less than the width of the carriage.
  • the spacing of the fork arms is effected in a conventional manner by sliding these arms on the crosspieces 21, 22.
  • the load-bearing plate is made integral with the lifting mast by means of an axis 24 carried by the gussets 23.
  • the lifting mast cooperates with a set of means which allow it to occupy their horizontal position when the load-bearing plate is lowered.
  • the base of the mast 19 carries a hinge pin 25 integral with a slide 26.
  • the latter is produced in the form of a small guided carriage and essentially comprises two small braced beams carrying four rollers of bearing "g", guided by the surface of the profile in "1" of the side members 5 and 6.
  • the rollers "g” therefore allow the translation of the guide carriage 26 and, consequently, the displacement of the axis 25 in a horizontal plane.
  • the guide carriage 26 also carries the hinge pin 30 of a main positioning rod 28, the ends of which rotate about an articulation axis 27 and around the axis 30.
  • the axis d the articulation 27 is fixed to a pair of gussets 29 secured to the upper crosspiece 22.
  • the distance between the axes 25 and 30, carried by the guide carriage 26, is equal to the distance between the axes 24 and 27.
  • the axes 25, 30 and 24, 27 are, moreover, parallel to each other, included in parallel planes and consequently constitute edges of a non-deformable parallelepiped during the movements of the carriage 26.
  • the chassis 1 carries the fixed articulation axis 31, of a support rod 32, the length of which is equal to half of the distance separating the articulation axis 25 from the lifting mast 19 on the guide carriage 26, from the articulation axis 24 of the load-bearing platform with forks 20.
  • the articulation axis 31 is coaxial with axis 24 when the load-bearing plate occupies a low position.
  • the support rod 32 is, moreover, articulated on the mast 19 about an axis 0 'situated midway between the parallel axes 25, 24 and in the plane defined by these axes.
  • the lifting mast 19 carries the anchor of a traction member coupled to a jack.
  • the anchoring of the traction member consists of a yoke 37 welded to the mast.
  • the yoke 37 carries the axis of rotation 36 of an articulated tenon 38.
  • the tenon 38 is integral with the traction member constituted according to the example chosen by a chain 39 which cooperates with the contact surface of a rotating cam 40.
  • Two actuating cylinders 41 here ensure the lifting or lowering movement of the mast.
  • the body of each jack 41 is articulated on an upright 12, and the push rod 42 of the jack carries a tension roller 43 of the traction chain 39, the ends of which are respectively anchored on the lug 38 and on the cylinder body.
  • the tensile or tensioning force on the chain 39 is supported by the axis of rotation 45 of the cam 40.
  • the axis 45 is carried by a yoke attached to an element of the chassis 1 of the carriage.
  • the profile of the surface of the cam 40 is such that the control force imparted to the mast 19 by the chain 39 is substantially perpendicular to said mast.
  • the chain position 39 between the tension roller 43 and the pin 38 is wound during a fraction of the mast travel around the cam 40, while retaining the coupling with play between the pin 38 and a mortise 46 of said cam 40.
  • the tenon 38 has left the mortise 46 and this tenon-mortise coupling becomes effective again when the mast is lowered.
  • the carriage 26 moves along the longitudinal members 5, 6. This movement is accompanied by a rotation of the support rod 32 around the fixed axis 31.
  • the axis of articulation 0 'of the connecting rod 32 on the mast 19 therefore describes an arc of a circle around the axis 31 and the fork load carrier plate 20 moves vertically parallel to the vertical passing through said axis 31.
  • Two vertical parallel sheets G respectively bolted to the longitudinal members 5 and 6 and on the vertical uprights 11, placed at the front of the carriage, ensure the guidance of the mast during its lifting or lowering movement and avoid accidental lateral offsets of the mast and of his charge.
  • the positioning rod 28 can carry, if desired, an additional protective frame which extends vertically in front of the driver's knees during the evolutions of the carriage with its mast lowered.
  • an additional protective frame which extends vertically in front of the driver's knees during the evolutions of the carriage with its mast lowered.

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)
EP78400003A 1977-06-29 1978-06-01 Chariot élévateur perfectionné Expired EP0000295B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7719913A FR2395939A1 (fr) 1977-06-29 1977-06-29 Chariot elevateur perfectionne
FR7719913 1977-06-29

Publications (2)

Publication Number Publication Date
EP0000295A1 EP0000295A1 (fr) 1979-01-10
EP0000295B1 true EP0000295B1 (fr) 1981-06-24

Family

ID=9192712

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78400003A Expired EP0000295B1 (fr) 1977-06-29 1978-06-01 Chariot élévateur perfectionné

Country Status (12)

Country Link
US (1) US4215971A (it)
EP (1) EP0000295B1 (it)
JP (1) JPS5413181U (it)
AU (1) AU519105B2 (it)
DE (1) DE2860801D1 (it)
DK (1) DK290478A (it)
ES (1) ES470725A1 (it)
FR (1) FR2395939A1 (it)
HU (1) HU179291B (it)
IT (1) IT1109731B (it)
TR (1) TR20655A (it)
ZA (1) ZA783288B (it)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60237918A (ja) * 1984-05-11 1985-11-26 セイレイ工業株式会社 コンバインにおけるカセツトタンク駆動用動力の出力部の構造
DD229387A1 (de) * 1984-12-07 1985-11-06 Vta Leipzig Paul Froehlich Veb Hubvorrichtung, insbesondere fuer gabelstapler
US4822237A (en) * 1985-11-21 1989-04-18 The Gradall Company Extended reach materials handling apparatus
FR2690895A1 (fr) * 1992-05-07 1993-11-12 Manitou Bf Chariot de manutention électrique à bras télescopique.
US5375963A (en) * 1993-01-19 1994-12-27 Wohlwend; Clayton E. Multipurpose lifting apparatus
DE4320988C2 (de) * 1993-06-24 1995-10-26 Josef Paul Transportfahrzeug zum Laden und Umsetzen von Containern
US5709523A (en) * 1995-06-07 1998-01-20 Ware; Emmet P. Material handling lift
BE1012693A3 (nl) * 1999-06-01 2001-02-06 Callens Ludo Genoemd Ludwig Wi Heftruck.
US6757958B1 (en) 2000-05-11 2004-07-06 Jlg Omniquip, Inc. Load handler with modular frame assembly
ITMO20030021A1 (it) * 2003-01-30 2004-07-31 Manitou Costr Ind Srl Articolazione di estremita' per elevatori a bracci telescopici.
GB2575825B (en) * 2018-07-24 2022-04-20 Cargotec Res & Development Ireland Limited A truck mounted forklift
CN110482447A (zh) * 2019-08-20 2019-11-22 戚春凤 一种适用于叉车的侧面货叉机构

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US958911A (en) * 1909-08-05 1910-05-24 John Durkee Hay-stacker.
GB191511964A (en) * 1915-08-19 1916-07-27 Henry Osborne Baldry Improvements in Excavating Apparatus Applicable to Portable Steam and like Cranes.
US1623194A (en) * 1921-08-30 1927-04-05 Francis C Marshall Excavating machine
US2276483A (en) * 1940-07-23 1942-03-17 Le Roy W Hahn Loader-stacker
US2310284A (en) * 1940-11-19 1943-02-09 Albert G Gurries Front end loader
US2442043A (en) * 1944-11-18 1948-05-25 Henry Mfg Company Inc Loading device
US2377112A (en) * 1944-11-27 1945-05-29 John H Strunk Material handling apparatus
US2449160A (en) * 1946-04-02 1948-09-14 Reconstruction Finance Corp Vehicle mounted front end loader
US2598685A (en) * 1950-11-02 1952-06-03 Greenlief Jasper Material handling machine
DE1009562B (de) * 1955-09-05 1957-05-29 Friedrich Jungheinrich Dr Ing Stapelgeraet
US2998891A (en) * 1956-12-17 1961-09-05 Fwd Corp Side loading fork lift truck
FR2294979A1 (fr) * 1974-12-19 1976-07-16 Unelec Dispositif de manutention de charges

Also Published As

Publication number Publication date
IT7868294A0 (it) 1978-06-05
DE2860801D1 (en) 1981-10-01
TR20655A (tr) 1982-03-25
JPS5413181U (it) 1979-01-27
ES470725A1 (es) 1979-01-16
FR2395939A1 (fr) 1979-01-26
AU519105B2 (en) 1981-11-05
EP0000295A1 (fr) 1979-01-10
US4215971A (en) 1980-08-05
ZA783288B (en) 1979-06-27
FR2395939B1 (it) 1981-07-24
HU179291B (en) 1982-09-28
IT1109731B (it) 1985-12-23
DK290478A (da) 1978-12-30
AU3723678A (en) 1980-01-03

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