US3353698A - Attachment for industrial truck - Google Patents

Attachment for industrial truck Download PDF

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Publication number
US3353698A
US3353698A US517355A US51735565A US3353698A US 3353698 A US3353698 A US 3353698A US 517355 A US517355 A US 517355A US 51735565 A US51735565 A US 51735565A US 3353698 A US3353698 A US 3353698A
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US
United States
Prior art keywords
carriage
sprocket
truck
uprights
ram
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
US517355A
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English (en)
Inventor
David H Link
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.)
Doosan Bobcat North America Inc
Original Assignee
Clark Equipment 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 Clark Equipment Co filed Critical Clark Equipment Co
Priority to US517355A priority Critical patent/US3353698A/en
Priority to GB54440/66A priority patent/GB1112170A/en
Priority to DE19661481121 priority patent/DE1481121A1/de
Priority to BE691407D priority patent/BE691407A/xx
Priority to FR88235A priority patent/FR1505255A/fr
Application granted granted Critical
Publication of US3353698A publication Critical patent/US3353698A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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

Definitions

  • Another object of the invention is to minimize the use of hydraulic actuator mechanism in lift truck attachments in order to improve operator visibility, minimize leakage problems, and eliminate the requirement of special sheave assemblies for guiding hydraulic hoses to attachments at all elevations thereof.
  • Another object of the invention is to provide an improved side shifter attachment for lift trucks.
  • I provide rotatable sprockets which secure the main lifting chain at its one end to the lift carriage and at its other end to a fixed portion of the truck, actuator means for rotating the latter sprocket for actuating the lifting chain, and means associated with the carriage for utilizing the resulting chain and sprocket movement to impart a linear movement to the carriage.
  • FIGURE 1 is a front elevational view of a lift truck upright which embodies my invention
  • FIGURE 2 is a sectional view taken along line 22 of FIG. 1;
  • FIGURE 3 is a plan view of the uprightshown in FIGS. 1 and 2;
  • FIGURES 4 and 5 are enlarged partial views of the upright shown in FIG. 1 wherein the device of my invention is shown in different operating positions;
  • FIGURES 6 and 7 are enlarged sectional views of portions of the fork carriage side shifter mechanism.
  • the numeral 10 denotes generally a lift truck upright and load carriage assembly adapted for pivotal mounting on the forward drive axle of the truck by a pair of laterally spaced trunnion members 12, one of which is shown, which are secured to rear fixed portions of the upright and provide circular bearing surfaces 14 for mounting on the drive axle.
  • a pair of laterally spaced brackets 16 are secured also to rear fixed portions of the upright for connection with a pair of hydraulic upright tilt cylinder assemblies, not shown, which operate in well-known manner to tilt the upright assembly forwardly and rearwardly about the drive axle of the truck.
  • the upright assembly 10 may be of the-construction disclosed in more detail in Patent No. 3,213,967. Generally, it comprises an outer guideway formed by a pair of channel members 18 and an inner slide structure formed by a pair of I-beam section members 20 which telescope in overlapping nested relation with corresponding members of outer guide structure 18. I-beam members 20 are supported in outer channel members 18 by pairs of rollers 28, as described in detail in the abovementioned patent. Transverse support members 30 and 32 are secured to the rear flange portions of the pairs of channels and I-beams .18 and 20 for bracing these members.
  • a load supporting carriage assembly 22 is 3,353,698 Patented Nov.
  • the lifting mechanism includes a conventional lift cylinder and piston assembly 34 having a cross head 36 located at the outer end of the piston rod and carrying on opposite sides of the lift cylinder a pair of sprocket members 38 which engage lifting chain 40.
  • the lift cylinder 34 is secured at the lower end thereof to a fixed transverse portion of the upright assembly at numeral 43. Upright assembly 10 as thus far described is conventional.
  • a relatively short actuator cylinder 48 is located at one side of lift cylinder 34 and is pivotally connected at its base end by a bracket and pin 50 to a fixed extension 52 of a collar 54 which is secured to the lower end portion of the cylinder assembly 34.
  • the piston rod end 56 is bifurcated and is pivotally connected by a pin 58 to the outer end of a lever arm 60 which is offset rearwardly and secured to sprocket 44 by an annular bearing portion 62 which is rotatable on a bearing sleeve 63.
  • Actuator cylinder 48 is doubleacting, and fluid pressure supplied to the lower end thereof extends the piston rod to rotate sprocket 44 in a counterclockwise direction (FIG. 4), whereas retraction thereof actuates lever 60 to rotate the sprocket in a clockwise direction (FIG. 5).
  • Sprocket 44 functions as a rotatable fixed anchor for chain 40, which is reeved on sprocket 44 and extends upwardly from opposite sides thereof for reeving on crosshead sprockets 38.
  • Fork carriage assembly 22 comprises a pair of vertically spaced and transversely extending fork bar members 64 secured together and supported by rollers 24 in I- beams 20 by the pair of vertically extending and transversely spaced brackets 26.
  • a vertically extending plate 66 is mounted by bolts 68 to upper fork bar 64 and supports from the top edge thereof a transverse hollow tubular journal or guide member 70.
  • the fork bars 64 are notched to receive overlapping bracket members 72 and 74 at the upper and lower edges thereof, bracket 72 being secured to plate 66 and bracket 74 to a forwar-d fork carriage plate 86 by a member 78.
  • an inner shaft member 80 Supported from tubular guide 70 for sliding movement transversely of the truck is an inner shaft member 80, to the opposite ends of which are secured downwardly extending plates 82 to which are secured at opposite ends vertically spaced and transversely extending fork carriage plate members 84 and 86.
  • Plate 84 is notched at 85 along the upper edge thereof to receive a pair of fork tines, or other load supporting device.
  • a fork time is illustrated in phantom view at numeral 88 in FIG. 2.
  • Pork tine brackets 90 and 92 support the fork tines from carriage plates 84 and 86, the fork tines being adapted for adjustment laterally in selected ones of the notches 85.
  • a pair of transversely mounted support rollers 94 are mounted for rotation on vertical pins 96 which are secured in block members 98 on plate 86. Rollers 94 extend through slots 100 in the plate for rolling engagement during side shifting of the fork carriage with lower fork bar 64, and maintain the proper spacing between the fork bar and carriage plate.
  • a block member 102 is secured to opposed inner horizontal edges of carriage plates 84 and 86 and defines with plate 86 a vertically extending elongated slot 104.
  • Aroller 106 engages in slot 104 and is located at the upper end thereof when the fork carriage assembly is in a centered transverse position on the upright assembly, as in FIG. 1.
  • a lever arm 108 is connected at its outer end to roller 106 and at its inner end is fixedly secured to the forward end of a rotatable shaft 110 which extends into a hollow sleeve extension 112 of a sprocket 114 which is mounted on the opposite side of fork bar 64.
  • a bushing 116 for sprocket 114 is secured partially in the fork bar 64 and partially in a bearing block 118 which is secured to the upper edge of lower plate 64.
  • a recessed bolt 120 secures shaft 110 to sprocket 114.
  • Chain 40 reeves both sprockets 114 and 124. It will now be seen that the lifting chain 40 is a continuous or endless chain.
  • the chain is constructed of links mounted at right angles to each other above each side portion of sprocket 44, and sprockets 114 and 124, as shown at numerals 126 and 128 on one side of said sprockets (FIG. 2), so that the respective chain portions conform to the various sprockets 38, 44, 114 and 124, sprockets 38 being mounted for rotation on an axis transverse of the truck and the other sprockets being mounted for rotation on axes longitudinal of the truck.
  • energization of lift cylinder assembly 34 extends the cross head 36 thereof to elevate the carriage assembly in I-beams 20, and to elevate the I-beam in outer channel sections 18 in known manner.
  • sprockets 44, 114 or 124 rotates during vertical movement per se of carriage assembly 22.
  • the fixed sprocket 44 functions as a truck anchor for chain 40, so the sprockets 114 and 124 function as a chain anchor on the carriage assembly 22. If it is desired to side shift the fork carriage 80, 82, 84. 86 to one side or the other of the position of FIG.
  • actuator cylinder 43 is energized in either extension or retraction which actuates lever arm 60 and rotates sprocket 44, thereby actuating chain 40 independently of any lifting action to rotate sprockets 1 14 and 124 either clockwise or counterclockwise. Rotation of the latter sprockets causes lever arm 108 to actuate roller 106 either to the right or to the left in slot 104, as shown in FIGS. 4 and 5.
  • the actuator 48 is extended, which action causes chain 40 to rotate sprockets 44, 114 and 124 counterclockwise, thereby actuating lever 108 counterclockwise approximately 90, as shown, which causes roller 106 to traverse the length of slot 104 forcing the fork carriage to the left in guide support tube 70.
  • the fork tines or other load engaging mechanism supported by the carriage are enabled to engage loads not centered with respect to the longitudinal axis of the truck.
  • retraction of cylinder 48 actuates sprockets 44, 114 and 124 clockwise which rotates lever arm 108 and roller 106 to the position shown in FIG. 5, thereby actuating the fork carriage to the right of center.
  • a load carriage as-- sembly having first and second relatively movable portions mounted for elevation in the upright assembly, and extensible motor means in the upright assembly having a first pair of spaced elevatable wheel means supported from one end and rotatable on an axis generally transverse of the truck, second wheel means mounted below said first wheel means for rotation on an axis longitudinal of the truck,.
  • third wheel means mounted on the first portion of the car-- riage assembly for elevation therewith and rotatable on an axis longitudinal of the truck, a single endless flexible: means reeving said first, second and third Wheel means,.
  • the second portion of said carriage assembly being mount-- ed for substantially horizontal movement relative to the: first portion, means for actuating said flexible means to rotate said third wheel means, and means operatively connecting said third wheel means to said second carriage portion for actuating the latter in said substantially horizontal movement.
  • a device as claimed in claim 1 wherein said means which connects said third wheel means to said second carriage portion comprises actuator lever means for con-- vertin g rotation of said third wheel means to substantially horizontal motion of said second carriage portion.
  • lever means comprises slot means in said second carriage portion and a lever element connecting said slot means to said third wheel means, such that upon rotation of said third wheel means said lever is rotated and the end thereof connected to said slot means is actuated along said slot means thereby actuating said second carriage portion in said substantially horizontal movement.
  • said third wheel means comprises a pair of laterally spaced wheel members, said lever means being connected to one of said wheel members.
  • said second wheel means comprises a single wheel member secured for rotation to a fixed element of the extensible motor means, and said actuating means for the flexible means being connected to said second wheel means for rotating the latter.
  • said actuating means for the flexible means comprises a double-acting cylinder assembly secured at its one end to a fixed portion of said extensible motor means and at its other end to said second wheel means for rotating the latter in either direction, whereby to actuate said second carriage portion either to the right or to the left relative to a centered position thereof transversely of the upright assembly.
  • a load lifting upright assembly mounted at one end thereof including an extensible motor means in the upright assembly for actuating vertically sprocket and lifting chain means connected to the extensible end of the motor means, a load carriage assembly including a portion mounted for elevation in the upright assembly, sprocket means mounted for rotation on said first portion, said lifting chain reeving said latter sprocket means, a second carriage portion supported from the first carriage portion for transverse movement relative thereto, means operatively connecting said latter sprocket means to said second carriage portion such that rotation of said latter sprocket means actuates said operative con- 5 6 nection to move said second carriage portion transversely References Cited of the first carriage portion, and means for actuating said UNITED STATES PATENTS chain independently of actuation thereof by said extensible motor means for rotating said carriage mounted 214111263 11/1946 Guenn et a1 214'701 sprocket means 5 2,473,659 6/1949 Musgrave 21

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  • 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)
US517355A 1965-12-29 1965-12-29 Attachment for industrial truck Expired - Lifetime US3353698A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US517355A US3353698A (en) 1965-12-29 1965-12-29 Attachment for industrial truck
GB54440/66A GB1112170A (en) 1965-12-29 1966-12-06 Improvements relating to lift trucks
DE19661481121 DE1481121A1 (de) 1965-12-29 1966-12-17 Vorrichtung zum seitlichen Bewegen der Lastaufnahmemittel von Hubstaplern
BE691407D BE691407A (enrdf_load_stackoverflow) 1965-12-29 1966-12-19
FR88235A FR1505255A (fr) 1965-12-29 1966-12-20 Dispositif de commande pour les accessoires d'un chariot élévateur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US517355A US3353698A (en) 1965-12-29 1965-12-29 Attachment for industrial truck

Publications (1)

Publication Number Publication Date
US3353698A true US3353698A (en) 1967-11-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
US517355A Expired - Lifetime US3353698A (en) 1965-12-29 1965-12-29 Attachment for industrial truck

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US (1) US3353698A (enrdf_load_stackoverflow)
BE (1) BE691407A (enrdf_load_stackoverflow)
DE (1) DE1481121A1 (enrdf_load_stackoverflow)
FR (1) FR1505255A (enrdf_load_stackoverflow)
GB (1) GB1112170A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3480167A (en) * 1968-02-05 1969-11-25 Allis Chalmers Mfg Co Fork interchanger
US20050186059A1 (en) * 2004-02-25 2005-08-25 Pietro Foroni Modular assembly for manufacturing structures for support and powered translation of forks in lift trucks

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE420591B (sv) * 1979-09-03 1981-10-19 Kalmar Last Maskin Verkstad Ab Anordning vid ett mastformigt, teleskopiskt forlengbart lyftstativ till en motordriven truck
DE2925610C2 (de) * 1979-06-25 1984-04-26 Mannesmann AG, 4000 Düsseldorf Verschiebantrieb für einen ins Regalfach einfahrbaren Träger eines Regalförderzeuges
CN113200473B (zh) * 2021-04-30 2023-08-25 西安虚拟骑乘科技有限公司 一种多自由度的升降单元
CN114132873A (zh) * 2021-12-07 2022-03-04 合肥新思路智能科技有限公司 一种小前移式移动机器人前置专用叉车板

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2411263A (en) * 1945-08-13 1946-11-19 Towmotor Corp Industrial truck
US2473659A (en) * 1946-06-10 1949-06-21 Towmotor Corp Industrial truck
US3292804A (en) * 1963-10-29 1966-12-20 Veneman Charles Clarke Pivotal and longitudinally movable attachment for a lift truck

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2411263A (en) * 1945-08-13 1946-11-19 Towmotor Corp Industrial truck
US2473659A (en) * 1946-06-10 1949-06-21 Towmotor Corp Industrial truck
US3292804A (en) * 1963-10-29 1966-12-20 Veneman Charles Clarke Pivotal and longitudinally movable attachment for a lift truck

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3480167A (en) * 1968-02-05 1969-11-25 Allis Chalmers Mfg Co Fork interchanger
US20050186059A1 (en) * 2004-02-25 2005-08-25 Pietro Foroni Modular assembly for manufacturing structures for support and powered translation of forks in lift trucks
US7588409B2 (en) * 2004-02-25 2009-09-15 Bolzoni S.P.A. Modular assembly for manufacturing structures for support and powered translation of forks in lift trucks

Also Published As

Publication number Publication date
FR1505255A (fr) 1967-12-08
BE691407A (enrdf_load_stackoverflow) 1967-05-29
DE1481121A1 (de) 1969-01-30
GB1112170A (en) 1968-05-01

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