US2698698A - Lifting attachment for industrial trucks - Google Patents

Lifting attachment for industrial trucks Download PDF

Info

Publication number
US2698698A
US2698698A US310882A US31088252A US2698698A US 2698698 A US2698698 A US 2698698A US 310882 A US310882 A US 310882A US 31088252 A US31088252 A US 31088252A US 2698698 A US2698698 A US 2698698A
Authority
US
United States
Prior art keywords
lifting
forks
members
fork
lifting attachment
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
US310882A
Inventor
Harold J Smith
Casper H Uldriks
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.)
Kellanova
Original Assignee
Kellogg Co
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 Kellogg Co filed Critical Kellogg Co
Priority to US310882A priority Critical patent/US2698698A/en
Application granted granted Critical
Publication of US2698698A publication Critical patent/US2698698A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B66F9/16—Platforms; Forks; Other load supporting or gripping members inclinable relative to mast

Definitions

  • This invention relates to fork-lift industrial trucks, and more particularly to a lifting attachment for trucks of this type.
  • This invention further contemplates the provision of a lifting attachment adapted to be secured to the lifting carriage of an industrial truck and embodying a set of fork members for use in lifting material loaded on conventional pallets, and another set of fork members employed for lifting material in bags.
  • This invention further contemplates the provision of a lifting attachment in which the bag lifting fork members are arranged in fixed position on the lifting carriage of the truck, while the pallet engaging form members are pivotally mounted on the lifting carriage for movement from an operative position to an inoperative positton.
  • a further object of this invention is to provide a lifting attachment in which the bag lifting fork members are preferably formed of round rod stock to permit withdrawal of the members from under a load of bagged material by merely moving the truck away from the material.
  • Fig. 1 is a perspective view illustrating a lifting attachment embodying features of the present invention, the attachment being shown as applied to a power actuated lift carriage of an industrial truck.
  • Fig. 2 is a perspective view illustrating the lifting attachment, showing the pallet lifting forks secured in their upright position by means of latches.
  • the lifting attachment is shown as comprising a generally rectangular frame 2 embodying spaced side members 4-4, a top member 6 and a base member 7.
  • a transverse member 9 extends between the side members 4-4 above the base member 7, and a central upright member 11 extends between the top and base members.
  • a pair of spaced fork housing members 12-12 are spaced inwardly from each side member 4 and extend between the top and base members.
  • the base member 7 is provided at spaced intervals with forwardly projecting mounting brackets 13 formed with cylindrical bores to snugly receive the ends of bag lifting fork members 14 formed of rod stock, the mem- 2,698,698 Patented Jan. 4, 1955 bers being welded or otherwise secured to their respective brackets and provided with rounded ends and smooth surfaces to oner mm1mum frictional resistance to withdrawal of said members from underneath a stack of material contained in bags.
  • a pair or pallet lirtmg fork members 16 of generally rectangular cross section having a greater width than thickness are each provided WllIl a pair of spaced, upwaruly pro ecting bearing ears 17-1! formed with coaxial apertures to receive a pivot pin 16 mounted at its ends in the fork housing members 12-42.
  • the fork members .to may be of hollow construction and formed with wedge-shape front ends 19.
  • the pivotally connected ends or the form members 16 are disposed in abutting engagement with the base member 7 when the fork members are in operative lilting position in a plane normal to the frame 2.
  • the pallet engaging fork members 16 are pivoted to their inoperative position, their tree ends are engaged by latch members 21 pivotally mounted on the frame 2.
  • latch members 21 pivotally mounted on the frame 2.
  • the fork members 16 are manually pivoted to their inoperative position, their respective latch members 21 are rormed and balanced to automatically engage the free ends of the fork members to secure the latter in lixed position in a common plane with the frame 2.
  • the lifting attachment is adapted to be permanently or detachaoly connected to a carriage 2'6 01' a conventional industrial truck 24 by means of rivets or bolts extending through the base member 7 and transverse member 9, the carriage being movable vertically along upright guides 26-26 of the truck by conventional power means (not shown) under the control of the operator.
  • the pallet llrting forks 16 are lirst pivoted to their inoperative position with their upper ends engaged by their respective latches 21.
  • the bags of material are then manually stacked upon the bag lifting forks 14 and raised above the floor by the power operated carriage 23 of the truck 24 for transportation to a different part of a plant.
  • the carriage 23 In removing the bags from the truck, the carriage 23 is lowered until the bags engage and come to rest upon a floor, pallet, stacked bags, or other support; after which the truck 24 is moved rearwardly to withdraw the bag lifting forks 14 from underneath the load of bags. Due to the relatively wide spacing between the forks 14 and also due to the smooth, small-diameter cylindrical surfaces of the forks, it is possible to withdraw the forks from underneath a load of material in bags without imparting corresponding movement of the bags along their support, due to relatively greater frictional resistance between the load and support than between the load and the forks. It is thus possible to unload bags of material from forks without employing hydraulic pushers or the like to push the load from the forks.
  • the pallet lifting forks 16 are pivoted to their operative position between the forks 14 for movement into engagement against the underside of the pallet in a manner well known in this art for lifting, transporting, and unloading the pallet.
  • a fabricated rectangular shape frame including connected top, bottom and upright side members, five forks arranged in spaced parallel relation secured to said base member and projecting outwardly therefrom in a plane normal thereto, two of said forks having flat upper surfaces in a common plane with the upper surfaces of the other of said forks, said other forks being formed of round rod stock, said two forks being movable to an upright position against the front side of said frame to permit bags of material loaded onto the other of said forks to sag downwardly into frictional engagement with a load supporting surface to permit withdrawal of the forks from underneath the load, latch means to secure said two forks in an upright position, and means to secure said frame to a lift carriage of a truck.

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)

Description

H. 4. s MlTH EI'AL LIFTING ATTACHMENT FOR INDUSTRIAL TRUCKS Jan. 4, 1955 Filed Sept. 22, 1951i .III IQI INVENTQRS -Harold.
Smith. H
United States Patent LIFTING ATTACHMENT FOR INDUSTRIAL TRUCKS Harold J. Smith and Casper H. Uldriks, Battle Creek, Mich., assignors to Kellogg Company, Battle Creek, Mich., a corporation of Delaware Application September 22, 1952, Serial No. 310,882
1 Claim. (Cl. 214-620) This invention relates to fork-lift industrial trucks, and more particularly to a lifting attachment for trucks of this type.
In the use of fork-lift industrial trucks for transporting material to various parts of a plant, the material is usually supported upon pallets designed to permit insertion and withdrawal of the fork during engagement and disengagement of the fork under the pallet.
In the use of fork-lift trucks for transporting material which is not supported upon a pallet, the material is usually manually loaded upon and removed from the fork. Some industrial trucks are, however, provided with hydraulic pusher devices operative to push a load of material from its loaded position on the fork onto a pallet, floor or other form of support. As these pusher devices are expensive, bulky, and sometimes become inoperative, the present invention contemplates the provision of a lifting attachment which permits material be unloaded therefrom without the use of a pusher CVICC.
This invention further contemplates the provision of a lifting attachment adapted to be secured to the lifting carriage of an industrial truck and embodying a set of fork members for use in lifting material loaded on conventional pallets, and another set of fork members employed for lifting material in bags.
This invention further contemplates the provision of a lifting attachment in which the bag lifting fork members are arranged in fixed position on the lifting carriage of the truck, while the pallet engaging form members are pivotally mounted on the lifting carriage for movement from an operative position to an inoperative positton.
A further object of this invention is to provide a lifting attachment in which the bag lifting fork members are preferably formed of round rod stock to permit withdrawal of the members from under a load of bagged material by merely moving the truck away from the material.
This invention embodies other novel features, details of construction and arrangement of parts which are hereinafter set forth in the specification and claim and illustrated in the accompanying drawing, wherein:
Fig. 1 is a perspective view illustrating a lifting attachment embodying features of the present invention, the attachment being shown as applied to a power actuated lift carriage of an industrial truck.
Fig. 2 is a perspective view illustrating the lifting attachment, showing the pallet lifting forks secured in their upright position by means of latches.
The lifting attachment is shown as comprising a generally rectangular frame 2 embodying spaced side members 4-4, a top member 6 and a base member 7. A transverse member 9 extends between the side members 4-4 above the base member 7, and a central upright member 11 extends between the top and base members. A pair of spaced fork housing members 12-12 are spaced inwardly from each side member 4 and extend between the top and base members. The several parts of the frame 2 thus shown and described are welded together to form a sturdy structure capable of supporting relatively heavy loads.
The base member 7 is provided at spaced intervals with forwardly projecting mounting brackets 13 formed with cylindrical bores to snugly receive the ends of bag lifting fork members 14 formed of rod stock, the mem- 2,698,698 Patented Jan. 4, 1955 bers being welded or otherwise secured to their respective brackets and provided with rounded ends and smooth surfaces to oner mm1mum frictional resistance to withdrawal of said members from underneath a stack of material contained in bags.
A pair or pallet lirtmg fork members 16 of generally rectangular cross section having a greater width than thickness are each provided WllIl a pair of spaced, upwaruly pro ecting bearing ears 17-1! formed with coaxial apertures to receive a pivot pin 16 mounted at its ends in the fork housing members 12-42. lt' desired, the fork members .to may be of hollow construction and formed with wedge-shape front ends 19.
The pivotally connected ends or the form members 16 are disposed in abutting engagement with the base member 7 when the fork members are in operative lilting position in a plane normal to the frame 2. When the pallet engaging fork members 16 are pivoted to their inoperative position, their tree ends are engaged by latch members 21 pivotally mounted on the frame 2. When the fork members 16 are manually pivoted to their inoperative position, their respective latch members 21 are rormed and balanced to automatically engage the free ends of the fork members to secure the latter in lixed position in a common plane with the frame 2.
The lifting attachment is adapted to be permanently or detachaoly connected to a carriage 2'6 01' a conventional industrial truck 24 by means of rivets or bolts extending through the base member 7 and transverse member 9, the carriage being movable vertically along upright guides 26-26 of the truck by conventional power means (not shown) under the control of the operator.
in the use of the lifting attachment on industrial trucks in lilting, transporting, and removing material contained in bags, the pallet llrting forks 16 are lirst pivoted to their inoperative position with their upper ends engaged by their respective latches 21. The bags of material are then manually stacked upon the bag lifting forks 14 and raised above the floor by the power operated carriage 23 of the truck 24 for transportation to a different part of a plant.
In removing the bags from the truck, the carriage 23 is lowered until the bags engage and come to rest upon a floor, pallet, stacked bags, or other support; after which the truck 24 is moved rearwardly to withdraw the bag lifting forks 14 from underneath the load of bags. Due to the relatively wide spacing between the forks 14 and also due to the smooth, small-diameter cylindrical surfaces of the forks, it is possible to withdraw the forks from underneath a load of material in bags without imparting corresponding movement of the bags along their support, due to relatively greater frictional resistance between the load and support than between the load and the forks. It is thus possible to unload bags of material from forks without employing hydraulic pushers or the like to push the load from the forks.
When the truck is employed in moving material supported on conventional pallets, the pallet lifting forks 16 are pivoted to their operative position between the forks 14 for movement into engagement against the underside of the pallet in a manner well known in this art for lifting, transporting, and unloading the pallet.
While this invention has been shown in but one form, it is obvious to those skilled in this art that it is not so limited but is susceptible of various changes and modifications without departing from the spirit and scope of the claimed invention.
We claim as our invention:
In a lifting attachment to be secured on a lift carriage of an industrial truck, a fabricated rectangular shape frame including connected top, bottom and upright side members, five forks arranged in spaced parallel relation secured to said base member and projecting outwardly therefrom in a plane normal thereto, two of said forks having flat upper surfaces in a common plane with the upper surfaces of the other of said forks, said other forks being formed of round rod stock, said two forks being movable to an upright position against the front side of said frame to permit bags of material loaded onto the other of said forks to sag downwardly into frictional engagement with a load supporting surface to permit withdrawal of the forks from underneath the load, latch means to secure said two forks in an upright position, and means to secure said frame to a lift carriage of a truck.
References Cited in the file of this patent UNITED STATES PATENTS Ryerson Dec. 8, 1931 Chubb et a1. July 26, 1932 Flynn et al. July 20, 1948 Cushman Jan. 8, 1952 Hally Feb. 5, 1952 Le Tourneau Mar. 11, 1952 Feb. 17, 1953 Sutherland Mar. 31, 1953
US310882A 1952-09-22 1952-09-22 Lifting attachment for industrial trucks Expired - Lifetime US2698698A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US310882A US2698698A (en) 1952-09-22 1952-09-22 Lifting attachment for industrial trucks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US310882A US2698698A (en) 1952-09-22 1952-09-22 Lifting attachment for industrial trucks

Publications (1)

Publication Number Publication Date
US2698698A true US2698698A (en) 1955-01-04

Family

ID=23204493

Family Applications (1)

Application Number Title Priority Date Filing Date
US310882A Expired - Lifetime US2698698A (en) 1952-09-22 1952-09-22 Lifting attachment for industrial trucks

Country Status (1)

Country Link
US (1) US2698698A (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2757813A (en) * 1954-01-08 1956-08-07 Grover E Adams Load handling attachment for industrial lift trucks
US2795347A (en) * 1953-03-25 1957-06-11 Baker Raulang Co Load handling attachment for industrial trucks
US2893582A (en) * 1958-01-02 1959-07-07 Otis Elevator Co Industrial truck
US2990069A (en) * 1956-10-30 1961-06-27 Greensburg Concrete Block Comp Pallet handling and conveying apparatus
DE1179866B (en) * 1961-09-09 1964-10-15 Demag Zug Gmbh Lift truck
DE1229001B (en) * 1960-01-28 1966-11-17 Hans Still Ges Mit Beschraenkt Loader with fork tines that can be adjusted to one another at regular intervals
US3467264A (en) * 1966-07-19 1969-09-16 Euclid Crane & Hoist Co The Load transfer and storage mechanism
US3966067A (en) * 1974-07-24 1976-06-29 Frodsham, E. Dale Disposal vehicle
US4043472A (en) * 1975-12-01 1977-08-23 Clark Equipment Company Load back rest for lift truck
EP0504527A1 (en) * 1991-03-20 1992-09-23 Gcm 600 Limited A load handling vehicle
US5230600A (en) * 1991-12-12 1993-07-27 Salvatore Marino Attachment for lift trucks
DE10210410B4 (en) * 2001-06-02 2005-12-15 Deutsche Rockwool Mineralwoll Gmbh & Co. Ohg Device for handling packaging and / or transport units for plate-shaped insulating elements
US20110085881A1 (en) * 2009-10-12 2011-04-14 Charles David Johnson Track hoe attachment to load and unload pipe
US20160090286A1 (en) * 2014-09-25 2016-03-31 Magline, Inc. Collapsible pallet picking adapter
US9840350B2 (en) 2014-11-05 2017-12-12 Crown Equipment Corporation Pallet truck with integrated half-size pallet support

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1835431A (en) * 1928-07-03 1931-12-08 Peter E Ryerson Pipe handling machine
US1868562A (en) * 1931-12-17 1932-07-26 Kenneth A Chubb Coil handling apparatus
US2445614A (en) * 1945-09-05 1948-07-20 Silent Hoist & Crane Co Inc Load handling apparatus
US2581364A (en) * 1946-08-02 1952-01-08 Walton W Cushman Drum-handling attachment for industrial trucks
US2584870A (en) * 1948-06-15 1952-02-05 John J Hally Attachment for fork lift trucks
US2589102A (en) * 1948-08-23 1952-03-11 Letourneau Inc Wheeled crane
US2628734A (en) * 1948-03-01 1953-02-17 Bestway Equipment Co Inc Sack handling device for lift trucks
US2633260A (en) * 1949-01-06 1953-03-31 Celanese Corp Fork lift truck

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1835431A (en) * 1928-07-03 1931-12-08 Peter E Ryerson Pipe handling machine
US1868562A (en) * 1931-12-17 1932-07-26 Kenneth A Chubb Coil handling apparatus
US2445614A (en) * 1945-09-05 1948-07-20 Silent Hoist & Crane Co Inc Load handling apparatus
US2581364A (en) * 1946-08-02 1952-01-08 Walton W Cushman Drum-handling attachment for industrial trucks
US2628734A (en) * 1948-03-01 1953-02-17 Bestway Equipment Co Inc Sack handling device for lift trucks
US2584870A (en) * 1948-06-15 1952-02-05 John J Hally Attachment for fork lift trucks
US2589102A (en) * 1948-08-23 1952-03-11 Letourneau Inc Wheeled crane
US2633260A (en) * 1949-01-06 1953-03-31 Celanese Corp Fork lift truck

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2795347A (en) * 1953-03-25 1957-06-11 Baker Raulang Co Load handling attachment for industrial trucks
US2757813A (en) * 1954-01-08 1956-08-07 Grover E Adams Load handling attachment for industrial lift trucks
US2990069A (en) * 1956-10-30 1961-06-27 Greensburg Concrete Block Comp Pallet handling and conveying apparatus
US2893582A (en) * 1958-01-02 1959-07-07 Otis Elevator Co Industrial truck
DE1229001B (en) * 1960-01-28 1966-11-17 Hans Still Ges Mit Beschraenkt Loader with fork tines that can be adjusted to one another at regular intervals
DE1179866B (en) * 1961-09-09 1964-10-15 Demag Zug Gmbh Lift truck
US3467264A (en) * 1966-07-19 1969-09-16 Euclid Crane & Hoist Co The Load transfer and storage mechanism
US3966067A (en) * 1974-07-24 1976-06-29 Frodsham, E. Dale Disposal vehicle
US4043472A (en) * 1975-12-01 1977-08-23 Clark Equipment Company Load back rest for lift truck
EP0504527A1 (en) * 1991-03-20 1992-09-23 Gcm 600 Limited A load handling vehicle
US5230600A (en) * 1991-12-12 1993-07-27 Salvatore Marino Attachment for lift trucks
DE10210410B4 (en) * 2001-06-02 2005-12-15 Deutsche Rockwool Mineralwoll Gmbh & Co. Ohg Device for handling packaging and / or transport units for plate-shaped insulating elements
US20110085881A1 (en) * 2009-10-12 2011-04-14 Charles David Johnson Track hoe attachment to load and unload pipe
US8641357B2 (en) 2009-10-12 2014-02-04 Charles David Johnson Track hoe attachment to load and unload pipe
US20160090286A1 (en) * 2014-09-25 2016-03-31 Magline, Inc. Collapsible pallet picking adapter
US9457999B2 (en) * 2014-09-25 2016-10-04 Magline, Inc. Collapsible pallet picking adapter
US9840350B2 (en) 2014-11-05 2017-12-12 Crown Equipment Corporation Pallet truck with integrated half-size pallet support

Similar Documents

Publication Publication Date Title
US2698698A (en) Lifting attachment for industrial trucks
US2752058A (en) Material handling lift truck
US9458000B2 (en) Pallet truck adapter
US2451226A (en) Apparatus for handling loads
US3561628A (en) Load handling in fork-lift trucks movable fork cover for forklift truck
US2843280A (en) Lift truck stacker
US2993610A (en) Push-off attachments for lift trucks
US2412184A (en) Pallet
US2675139A (en) Lift truck
US2422538A (en) Pallet truck
US2608315A (en) Industrial truck
US2445038A (en) Bottom dumping material handling box
US2496079A (en) Keg puller loading device for industrial trucks
US2606680A (en) Skip dumping attachment
US2704167A (en) Drum handling attachment for lift trucks
US3404791A (en) Load-supporting apparatus
US2987204A (en) Material handling attachment for industrial trucks
US3217912A (en) Container handling fork lift mechanism
US3589541A (en) Load handling in forklift trucks
US3105604A (en) Pallet handling device
US2387744A (en) Fork lift truck
US2702645A (en) Lift truck
US3197053A (en) Article-handling apparatus with pusher and anchor means mounted on a vertically movable subframe
US2727643A (en) Pallet retriever for industrial truck
US2465133A (en) Pallet and lift fork therefor