EP0199544A2 - Chariot élévateur à fourche - Google Patents

Chariot élévateur à fourche Download PDF

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Publication number
EP0199544A2
EP0199544A2 EP86302866A EP86302866A EP0199544A2 EP 0199544 A2 EP0199544 A2 EP 0199544A2 EP 86302866 A EP86302866 A EP 86302866A EP 86302866 A EP86302866 A EP 86302866A EP 0199544 A2 EP0199544 A2 EP 0199544A2
Authority
EP
European Patent Office
Prior art keywords
frame
carriage
sub
rams
members
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Withdrawn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
EP86302866A
Other languages
German (de)
English (en)
Other versions
EP0199544A3 (fr
Inventor
Brian Wakefield
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.)
Coventry Climax Ltd
Original Assignee
Coventry Climax Ltd
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 Coventry Climax Ltd filed Critical Coventry Climax Ltd
Publication of EP0199544A2 publication Critical patent/EP0199544A2/fr
Publication of EP0199544A3 publication Critical patent/EP0199544A3/fr
Withdrawn legal-status Critical Current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
    • B66F9/12—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
    • B66F9/147—Whole unit including fork support moves relative to mast
    • B66F9/148—Whole unit including fork support moves sideways
    • 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
    • B66F9/142—Movements of forks either individually or relative to each other
    • B66F9/144—Movements of forks relative to each other - independent

Definitions

  • This invention relates to fork lift trucks and, in particular, to fork lift trucks in which the fork arrangement is adapted to effect a side to side or side shift movement in addition to an up and down movement.
  • An object of the invention is to provide an improved fork lift truck incorporating a side shift facility which obviates disadvantages of existing arrangements.
  • a fork lift truck includes a vehicle body on which is mounted an upright mast, a sub-frame movable up and down the mast, a carriage mounted on the sub-frame for reciprocal movement relative to the sub-frame in a generally horizontal direction, and drive means extending between the sub-frame and the carriage for effecting the reciprocal, side shift movement, wherein the drive means includes rams located to the sides of a central region at the front of the vehicle.
  • the rams are each single-acting and hydraulically, electrically or pneumatically operated, one of the rams being arranged to effect a drive movement of the carriage in one direction and the other of the rams being arranged to effect movement in the opposite direction.
  • the rams may be double acting and both rams can work together to reciprocally move the carriage.
  • the central region is conveniently that region between the two upright members defining the mast.
  • the sub-frame preferably includes transverse members on which are slidably mounted complementary transverse members of the carriage, the forks being carried on the carriage members.
  • a fork lift truck generally comprises a wheeled frame 10 having an operator's position with seat 11 and cab 12.
  • a mast 13 In front of the driver's position at one end of the vehicle is a mast 13 which extends generally upwards and which supports for movement up and down on the mast a movable frame 15 on which is carried a pair of forks 16.
  • the forks 16 are of each L-shape having an upright portion 16A which is releasably located on the frame 15 and a generally horizontal portion 16B which extends forwardly of the vehicle to engage under a load to be picked up and transported by the vehicle.
  • the frame 15 is movable up and down the mast 13 by drive means 17 extending from the lower to the upper end of the mast and usually taking the form of a driven chain connected to the frame 15.
  • the frame 15 is guided on the mast by rollers (not shown in Fig. I).
  • the fork lift truck of Fig. 1 provides an arrangement in which the frame 15 and, therefore, the forks 16 are able to effect an up and down movement only and the frame 15 includes upper and lower transverse members 18 and 19 interconnected towards their ends by upright members 20 to provide a generally rectangular construction.
  • a supplementary carriage (not shown) is provided. This is mounted slidably in front relative to the transverse members 18 and 19 and is movable longitudinally of the members 18 and 19 by, for example a double-acting ram, mounted between the members 20 and interconnecting the carriage and the frame 15.
  • the forks 16 are mounted on the supplementary carriage so that they may be moved from side to side by operation of the ram to accurately position the forks under the load and to place the load accurately, with minimum manoeuvering of the vehicle.
  • FIGs. 2 and 3 a mounting for the forks is shown in which the facility for effecting side shift of the forks is integral with the mounting.
  • a sub-frame 22 is mounted for movement up and down along the mast 13 (only part of which is shown), the sub-frame 22 being guided for such movement by rollers 23.
  • At the forward side of the sub-frame 22 are located upper and lower transverse members 24 and 25 and the members 24 and 25 are interconnected by a pair of spaced apart upright members 26.
  • the upper transverse member 24 is formed along its upper edge with a bearing surface having horizontal portions 27 and a forwardly inclined or vertical portion 28.
  • a carriage 30 is mounted on the sub-frame 22 for movement relative thereto in the direction of the transverse member 24 to produce the side shift motion of the forks.
  • the carriage 30 has an upper transverse member 31 having a rearwardly directed portion 32 hooked over the member 24 and having surfaces in sliding engagement with the bearing surface portions 27 and 28.
  • the carriage transverse member 31 is also formed along its upper edge with a profile 33 for receiving the upper ends of conventional L-shaped forks 16 (only part of which is shown in Fig. 2).
  • the forks l6 are each located towards the lower end of the upright portion in relation to a lower transverse member 35 of the carriage 30 by a hooked-shaped member 36 which engages with a correspondly-sectioned portion of the member 35.
  • the lower transverse member 35 of the carriage is located relative to the lower transverse member 25 of the sub-frame 22 by removable brackets 38 which engage around the rear side of the lower transverse member 25.
  • Drive means for moving the carriage 30 relative to the sub-frame 22 includes a pair of single-acting hydraulically-operated rams 40 and 41.
  • Each of the rams 40 and 41 is arranged to the outside of the pair of spaced upright members 26 and interconnects the adjacent members 26 of the sub-frame 22 and an upright member 42 of the carriage 30.
  • the upright members 42 extend between and connect the upper and- lower transverse members 31 and 35 of the carriage towards the outer ends of the carriage.
  • the carriage may be moved by double acting rams or by electrically or pneumatically operated drive means.
  • the rams 40 and 4l are each arranged so that the ram cylinder is connected to the associated upright member 26 and the ram piston is connected to the associated carriage member 42.
  • a port 44 for introducing and releasing pressure fluid from the cylinder is provided for each ram and the ports 44 are connected to pipes 45 communicating with a source of fluid on the vehicle.
  • the fork lift arrangement described can be used with or without the side shift facility. If the side shift facility is not required the rams can be simply omitted and the carriage locked to the sub-frame in a central position.
  • Fig. 4 an additional facility enabling the forks l6 to be adjustably spaced relative to one another is provided.
  • the arrangement is in other respects similar to that of Figs. 2 and 3 with rams 40 and 41 for effecting the sideways movement of the forks l6 to take place simultaneously.
  • Further rams 50 and 51 are provided one ram 50 being connected to one of the forks 16 at one end and the other end of the ram 50 being connected to the member 42.
  • the other fork 16 is connected to the other member 42 at the other end of the frame and To the other fork 16.
  • Either the ram 50 or 51 is selected for operation so that the associated fork 16 can be moved in relation to the other fork 16 full extension of the associated ram 50 or 51 moving the fork to the chain line position towards the end of the frame.
  • Full extension of both rams 50 and 51 causes the forks 16 to be positioned at their widest chain line positions as shown. Operation of the rams 50 and 51 causes the associated forks 16 to slide along the transverse members 31 and 35 of the carriage.

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)
EP86302866A 1985-04-19 1986-04-17 Chariot élévateur à fourche Withdrawn EP0199544A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8510228 1985-04-19
GB8510228A GB8510228D0 (en) 1985-04-19 1985-04-19 Fork lift truck

Publications (2)

Publication Number Publication Date
EP0199544A2 true EP0199544A2 (fr) 1986-10-29
EP0199544A3 EP0199544A3 (fr) 1988-10-12

Family

ID=10578012

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86302866A Withdrawn EP0199544A3 (fr) 1985-04-19 1986-04-17 Chariot élévateur à fourche

Country Status (2)

Country Link
EP (1) EP0199544A3 (fr)
GB (1) GB8510228D0 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5033934A (en) * 1987-10-28 1991-07-23 Costruzioni Meccaniche Bolzoni S.P.A. Fork unit for lift trucks

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3241698A (en) * 1964-02-27 1966-03-22 Allis Chalmers Mfg Co Side shifting carriage for lift truck
US3356241A (en) * 1965-08-02 1967-12-05 Allis Chalmers Mfg Co Fork lock
GB1175020A (en) * 1968-01-12 1969-12-23 Allis Chalmers Mfg Co Improved side-shift carriage mechanism for lift trucks
GB1336551A (en) * 1970-01-20 1973-11-07 Bonser Eng Ltd Lifting devices
FR2322085A1 (fr) * 1975-08-27 1977-03-25 Bergerat Monnoyeur Sa Porte-fourches oscillant et a correction d'assiette pour elevateur de palettes
GB2099787A (en) * 1980-12-02 1982-12-15 Sanderson Roy Forklift shift attachment

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3241698A (en) * 1964-02-27 1966-03-22 Allis Chalmers Mfg Co Side shifting carriage for lift truck
US3356241A (en) * 1965-08-02 1967-12-05 Allis Chalmers Mfg Co Fork lock
GB1175020A (en) * 1968-01-12 1969-12-23 Allis Chalmers Mfg Co Improved side-shift carriage mechanism for lift trucks
GB1336551A (en) * 1970-01-20 1973-11-07 Bonser Eng Ltd Lifting devices
FR2322085A1 (fr) * 1975-08-27 1977-03-25 Bergerat Monnoyeur Sa Porte-fourches oscillant et a correction d'assiette pour elevateur de palettes
GB2099787A (en) * 1980-12-02 1982-12-15 Sanderson Roy Forklift shift attachment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5033934A (en) * 1987-10-28 1991-07-23 Costruzioni Meccaniche Bolzoni S.P.A. Fork unit for lift trucks

Also Published As

Publication number Publication date
GB8510228D0 (en) 1985-05-30
EP0199544A3 (fr) 1988-10-12

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Inventor name: WAKEFIELD, BRIAN