US3306481A - Mast extension mechanism for an industrial truck - Google Patents

Mast extension mechanism for an industrial truck Download PDF

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Publication number
US3306481A
US3306481A US358816A US35881664A US3306481A US 3306481 A US3306481 A US 3306481A US 358816 A US358816 A US 358816A US 35881664 A US35881664 A US 35881664A US 3306481 A US3306481 A US 3306481A
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US
United States
Prior art keywords
recess
chassis
mast assembly
mast
rollers
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 - Lifetime
Application number
US358816A
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English (en)
Inventor
Bowman-Shaw George Neville
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.)
Lancers Machinery Ltd
Original Assignee
Lancers Machinery 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 Lancers Machinery Ltd filed Critical Lancers Machinery Ltd
Application granted granted Critical
Publication of US3306481A publication Critical patent/US3306481A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B66F9/07559—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
    • B66F9/08—Masts; Guides; Chains
    • B66F9/10—Masts; Guides; Chains movable in a horizontal direction relative to truck

Definitions

  • This invention relates to side loading industrial trucks of the type in which loading means comprising, for example, a pair of forks, is carried on a mast assembly arranged to be traversed transversely of the truck from a position with in a recess, with which the truck is provided, to a position in which the forks extend beyond the side of the truck.
  • a side loading industrial truck comprises a chassis having a recess extending inwardly thereof from one side of the truck, a mast assembly supported in the recess on guide members, and movable along the guide members transversely of the chassis, a loading device supported from and movable vertically with respect to the mast assembly, and means to extend sideways the part of the mast assembly suppolting the loading device to a predetermined distance beyond the side of the chassis.
  • a first and a second mast assembly is provided, the loading means being carried by the second mast assembly which is suspended from or coupled to the first mast assembly by a linkage system adapted to be extended from a position in which the second mast assembly is adjacent the first mast assembly to a position in which the second mast assembly and hence the loading means carried thereby are spaced outwardly from the first mast assembly.
  • the mast assembly of a side loading industrial truck is arranged to traverse, within the recess of the truck, along two guide members positioned one on each side of the recess, the guide members themselves being arranged to be traversed from a position within to a position in which they extend from the recess.
  • the guide members conveniently incorpbrate a channel within which rollers mounted on the mast assembly run.
  • the guide members themselves may be arranged to co-operate with further rollers secured to the sides of the recess.
  • Means may be provided to prevent splaying between the mast assembly and the guide members and between the guide members and the sides of the recess.
  • the mast assembly will normally first be traversed along the guide members from a position within the recess to a position adjacent its open end, and then the guide members will be extended from within the recess thereby greatly increasing the reach of the loading means carried by the mast assembly.
  • FIG. 1 is an end elevation of a side loading industrial truck of the type described in accordance with one embodiment of this invention.
  • FIG. 2 is a fragmentary side elevation of the mast assembly and part of the recess of a side loading industrial truck in accordance with another embodiment of the invention.
  • a first mast assembly 1 of a side loading industrial truck is shown in its fully extended position in the chassis recess.
  • a second mast assembly 2 is coupled to the mast assembly 1 by cross linkage members 3 and 4.
  • the member 3 is connected to the upper end of the second mast assembly 2, by a pivot 5 slidably engaged in a'slot 6 therein and is pivoted at 7 to the lower end of the mast assembly 1.
  • the member 4 is connected to the upper end of the first mast assembly 1 by a pivot 8 slidably engaged in a slot 9 therein and is pivoted at 10 to the lower end of the mast assembly 2.
  • the linkage members 3 and 4 are connected 'by a pivot 11 to which the piston rod 12 of a double acting hydraulic ram 13 is connected, the cylinder of the ram being pivotally connected at 14 to a bracket 15 fast with the upper end of the mast assembly 1.
  • Loading means comprising forks 16 are carried by the second mast 2 in a conventional manner, the forks being arranged for movement up and down the mast.
  • the second mast assembly 2 when the hydraulic ram 13 is extended, the second mast assembly 2 will adopt the position shown in which it is spaced outwardly from the mast assembly 1 thereby greatly increasing the reach of the forks, and when the hydraulic ram- 13 is contracted the second mast assembly takes up a position in which it lies adjacent the mast assembly 1.
  • the forks 16 may be coupled to the mast assembly 2, in a similar manner to that in which the second mast assembly 2 is coupled to the first mast assembly, so that the forks may be extended with respect to the second mast assembly still further to increase their reach.
  • An extensible foot may be mounted on the chassis and ram or otherwise operated to be lowered into contact with the ground beneath the extended mast assembly to counteract the vertical forces on the mast assembly tending to tip the chassis sideways.
  • FIG. 2 part of the mast assembly of a side loading industrial truck is shown at 17, the mast assembly being arranged within the recess of the truck, one side of which recess is indicated at 18.
  • the mast assembly is provided with rollers 19 arranged to run within a channel portion 20 of a generally cruciform guide element 21, so that the mast assembly may be traversed from a position within the recess to a position in which it is adjacent the open end thereof.
  • Rollers 19 are of course mounted on each side of the mast assembly and a .guide element 21 is similarly provided one on each side of the recess.
  • Each guide element 21 includes a flange 22 arranged to co-operate with rollers 23 secured to the sides of the recess.
  • the guide elements 21 may 'be extended from a position within the recess to a .position in which they extend beyond the open end thereof.
  • Means comprising rollers 24 and 27, are provided to prevent splaying longitudinally of the truck chassis between the mast assembly and the guide elements, and between the guide elements and the sides of the recess.
  • the rollers 24 are mounted on the mast assembly and arranged to co-operate with flanges 26 on the guide elements, and the rollers 27 are mounted on the guide elements to cooperate with flanges 28 fast with the sides of the recess.
  • the mast assembly 17 is normally first traversed along the guide elements 21 to a position adjacent the open end of the recess, and then the guide elements 21 are extended, carrying the mast assembly with them, so as greatly to increase the reach of the load carrying means mounted on the mast assembly.
  • a side loading industrial truck comprising a chassis, a recess in said chassis extending inwardly thereof from one side, guide members on the chassis at the sides of said recess, first and second mast assemblies supported on said guide members, means to move both said first and second mast assemblies transversely of the chassis along said guide members to a position near one side of said chassis, a loading device supported from and movable vertically with respect to said second mast. assembly, and means to move said second mast assembly with respect to said first mast assembly to a predetermined distance beyond said one side of said chassis.
  • a truck according to claim 1 wherein means are provided to prevent the parts of said chassis bounding opposite sides of said recess spreading apart longitudinally of the chassis.
  • a truck according to claim 1 wherein a stabilising device is provided on said chassis and extendi'ble to engage the ground beyond said one side of the chassis and beneath said first and second mast assemblies in the extended position thereof to counteract the forces acting on the truck tending to tip the truck sideways when said loading device is supporting a load off the ground.
  • a side loading industrial truck comprising a chassis, a recess in said chassis extending inwardly thereof from one side, guide members on said chassis at the sides of said recess, a first mast supported on said guide members, means for moving said first mast along the guide members transversely of said chassis, a second mast, a loading device supported from and vertically movable with respect to said second mast, a linkage system connecting said first and second masts to move as one, and means to actuate said linkage system to move said second mast with said loading device from a position adacent said first mast to a position spaced sidewardly from said first mast and outwardly of said chassis.
  • a truck according to claim 4 wherein said linkage system comprises at least one pair of cross linkage members each pivoted to the other at the central portions thereof, a pivotal connection between one end of each linkage member to one of said masts, a sliding connection between the other end of each said linkage member to the other of said masts, and power operated means operable to splay said linkage members to extend and support said second mast sidewardly away from said first mast.
  • a side loading industrial truck comprising a chassis, a recess in said chassis extending inwardly thereof from one side, a mast assembly disposed in said recess, a number of first rollers rotatably mounted along each side of said recess and of said mast assembly, a generally cruciform guide element at each side of said mast assembly having flanges rotatably engaged by said rollers, a number of second rollers rotatably mounted about axes at an angle to the axes of said first rollers on at least one of said guide element and said recess and respectively engaging at least one flange on said recess and element, a number of third rollers rotatably mounted about axes at an angle to the axes of said first rollers on at least one of said guide element and said mast assembly and respectively engaging at least one flange on said assembly and said element, the disposition of said rollers, channels and cruciform element being such that in combination they permit travel on said rollers of said guide element in said recess and of said assembly on said guide

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)
US358816A 1963-04-16 1964-04-10 Mast extension mechanism for an industrial truck Expired - Lifetime US3306481A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB14854/63A GB1009008A (en) 1963-04-16 1963-04-16 Improvements in or relating to side loading industrial trucks

Publications (1)

Publication Number Publication Date
US3306481A true US3306481A (en) 1967-02-28

Family

ID=10048671

Family Applications (1)

Application Number Title Priority Date Filing Date
US358816A Expired - Lifetime US3306481A (en) 1963-04-16 1964-04-10 Mast extension mechanism for an industrial truck

Country Status (5)

Country Link
US (1) US3306481A (de)
CH (1) CH421821A (de)
DE (1) DE1283152B (de)
GB (1) GB1009008A (de)
NL (1) NL6404063A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3445019A (en) * 1965-05-20 1969-05-20 Schmidt Karl Heinz Fork lift truck having a lifting device mounted for pivotal movement about a vertical pivotal axle
US4034881A (en) * 1976-01-19 1977-07-12 Caterpillar Tractor Co. Outrigger and frame support member
WO1982001363A1 (en) * 1980-10-16 1982-04-29 David W Lutz Lift and carry truck
US4690610A (en) * 1986-04-24 1987-09-01 Caterpillar Industrial Inc. Lift mast transport arrangement
ITBO20120638A1 (it) * 2012-11-23 2014-05-24 Bp S R L Carrello elevatore laterale.

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3740979A1 (de) * 1987-12-03 1989-06-22 Jungheinrich Kg Flurfoerderzeug zur seitlichen lastaufnahme
SE502573C2 (sv) * 1992-01-23 1995-11-13 Bt Ind Ab Lyfttruck med en lyftmastenhet fritt upplagd på truckens stödben och förskjutbar längs stödbenen medelst en pantografmekanism
DE102008031347A1 (de) * 2008-07-02 2010-01-07 Jungheinrich Aktiengesellschaft Vorschubvorrichtung für einen Gabelträger eines Flurförderzeugs

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2621812A (en) * 1950-01-21 1952-12-16 Le Grand H Lull Machine for handling and transporting material
US2973878A (en) * 1957-06-24 1961-03-07 Raymond Corp Material handling truck
US3151755A (en) * 1961-05-31 1964-10-06 Yale & Towne Inc Scissor lever with a pivotal link for shifting and tilting the mast on an industriallift truck

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2709017A (en) * 1951-09-05 1955-05-24 Yale & Towne Mfg Co Side loader attachment for industrial lift trucks
US2752056A (en) * 1951-12-12 1956-06-26 Baker Raulang Co Load handling, transporting and positioning vehicular machine
US2829785A (en) * 1953-12-14 1958-04-08 Otis Elevator Co Industrial truck
DE1009562B (de) * 1955-09-05 1957-05-29 Friedrich Jungheinrich Dr Ing Stapelgeraet
FR1155131A (fr) * 1956-05-17 1958-04-23 élévateur hydraulique ou pneumatique à usages multiples
US2998891A (en) * 1956-12-17 1961-09-05 Fwd Corp Side loading fork lift truck
US2896805A (en) * 1958-08-04 1959-07-28 Lonnie D Rigsby Cotton bale resampling and breakout device
DE1791976U (de) * 1959-04-06 1959-07-09 Friedrich Dr Ing Jungheinrich Gabelstapler fuer grosse stapeltiefe.
US3048293A (en) * 1960-09-16 1962-08-07 Walton W Cushman Side-loading counterbalanced industrial lift truck
FR1280910A (fr) * 1961-01-26 1962-01-08 Lansing Bagnall Ltd Perfectionnements aux chariots industriels
FR1303322A (fr) * 1961-10-10 1962-09-07 Yale & Towne Mfg Co Chariot élévateur latéral

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2621812A (en) * 1950-01-21 1952-12-16 Le Grand H Lull Machine for handling and transporting material
US2973878A (en) * 1957-06-24 1961-03-07 Raymond Corp Material handling truck
US3151755A (en) * 1961-05-31 1964-10-06 Yale & Towne Inc Scissor lever with a pivotal link for shifting and tilting the mast on an industriallift truck

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3445019A (en) * 1965-05-20 1969-05-20 Schmidt Karl Heinz Fork lift truck having a lifting device mounted for pivotal movement about a vertical pivotal axle
US4034881A (en) * 1976-01-19 1977-07-12 Caterpillar Tractor Co. Outrigger and frame support member
WO1982001363A1 (en) * 1980-10-16 1982-04-29 David W Lutz Lift and carry truck
US4690610A (en) * 1986-04-24 1987-09-01 Caterpillar Industrial Inc. Lift mast transport arrangement
ITBO20120638A1 (it) * 2012-11-23 2014-05-24 Bp S R L Carrello elevatore laterale.
WO2014080359A1 (en) * 2012-11-23 2014-05-30 Bp S.R.L. A side lift truck

Also Published As

Publication number Publication date
GB1009008A (en) 1965-11-03
NL6404063A (de) 1964-10-19
CH421821A (de) 1966-09-30
DE1283152B (de) 1968-11-14

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