US1890387A - Lumber elevator - Google Patents

Description

Dec. 6, 1932. G. L. KJELLANDER LUMBER ELEVATOR Filed Aug. 11. 1950 Sheets-Sheet 1 Dec. 6, 1932. G. KJELLANDERQ r 1,890,387

LUMBER ELEVATOR Filed Aug. 11, 1930 3 Sheets-Sheet 2 Dec. 6, 1932. ca. KJELLANDER LUMBER ELEVATOR Filed Aug. 11, 1930 3 Sheets-Sheet 3 Patented Dec. 6, 1 932;

was. 1

' j GUsa'AF: LEONARD KJEL ANDE ionsonnm anm swnnnn 1 LUMBER ELEVAEL OR, a

' This inventionrelates to improvementsin lumber elevatorsgespec'ially used in collect-' ing"-lurnber in piles." The"inventionv relates more particularly to? that kind of elevators which comprises two or; more endless chains provided with carriers by v hich the lumber willybe lifted "at theupwardly moving side of thechai'ns, moved around the upper end of the'elevator and" lowered at the downwardly moving'side-of the chains. 7

One obj ect of the invention is 'to provide improved means t'o'gu'id'e the carriers in their movement around the-top of theelevator in order to allow them to maintainthe lumber I downwardly opening fork, Thus; the memf one feature 4 of. the invention which has reference tothis object involves the provia in PQ e tively to the carriers;

sion of afguiding arm carried bytheshaft of the luppermost chiain Wheels of the elevator and connected by a link to a similar arin carriedby 'av'sh aft whichis parallel to 4-- sai d first-mentioned shaft and so positioned, relatively thereto that said two arms and said;

link will form three sides of a linked paral 2 5 le'logram the fourthfside of Which'is represented by the distance between the centres 0t said shaftst said parallelogram being'pro vided 'With 'means to engage the carriers dur-- their movement around the upper half The invention is illustrate' in the accompany ng drawings in"wh1 cl1,f I

.accordingfto' the invention,

fiig. Q is' a sideelevationofsaid elevator- Sisa side elevation of the uppermost I P' Q Qf h ev tor, 011 a larger scale sideelevation of the conveyor onwalar gersc'ale, I v a H @"Fig, 5 is a top plan viewbf said conveyor talrenoh'the same scale as inFig'; 4;

TWith reference tothe drawings, the m,

' merallliindicatesa carriage supported by] Wheels 2. Mounted on sald carriage is ,an

elevator comprising frame-Work indicated as a whole by 3 andtwo endless chains t, 4

each of which is carried by a lower chain Wheel 5 and an upper chain Wheel 6 mounted in saidframe." The {two upper chain Wheels r p I i a -;Attached to the ,comm on shaft'f'l Big. 1' frontelevation of an'elevator] 6 are carried by a common shaft? which con-Q Applicationffiled August 11, 1930, Sriallflo. 4*; 1,5s1;,jan 1 a; st gnant 31-; 19 2 9.-

stitut esthe driving shaft ofthe chains." To this end the shaft 7 is connected by bevel: gears 8, 9 to aiverti' cal' shaft- 10 which 3 is driven by 'a suitablepower motor (notfshovvn) pro-f vided onthecarriage 1Q W lumber to be lifted by the elevator.; Each; such members which maybe termed carrier comprises aircutvvardly proje'cting arm 11 5 1 a securedto the respective chain 4 in any ap-j V I propriate Way: and a fork-shaped member" 12; pivoted to saidar m 11 and providedvvitha counterweight '13 preferably" shaped as" af 'side,' f0rinstance,' asindicated arrows in 1 Fig. 2. .They are'adaptedto beheld in cor v I rect position in their vertical movement'bfy -direct engagement yvith suitable'parts'of the; V

frameQasvviH appear fronfFi'g. 2. To hold the carriers} in correct'position during their movement overthe upper chain vvheels tithe followingarrangementisprovided. a sa d? 1 upper chain vvheels '6 are tvvo arms 15, one for eachjchain, 1 though but one of them is shown in the dravvingsgj Eacharm isconnected byjalink 16 to a similar arm17 carriedfby a"; shaft 18 mounted in a bearing 19 'Whichisv,

carriedblv a transversely extending bar 20 1 of the 'framef3; The shaft 18-is situatedver- 1 1 tically below shafti'z and parallel therevvith The conne'ction'between link 16 and arm 17 isfadjustableso that the distance between the upper and lowerconnecting pointsyof link v l6lnay bemfade exactly equal to the distance .Q

; betwee'nqthe centres of theshafts 7 and The link 16'carrie's near its top a transverse-" T :ly extending arm 211Whichis adapted tofco v operatewithltheabutmentsl i' amannerato behereinafter described. As shown, the arms 15,17 and the link 16 Each chain 1 is provided vvith 'a plurality'; il of spaced membersto carry or support the? 1 n, a chain wheel 22 "secured to the shaft '18 which represent three sides of a linked parallelogram the fourth side ,of which is represented r by the distance between the Centres ofthe shafts -7 and 18. Thus, thelinkf 16 willal- 'ways hold a vertical position during the rotation of the armsand 17 with their shafts "7 .and 1.8 and,fas a result, the arm '21 will always be horizontal in said movement. The

shaft. 1'8 is rotated synchronously with. the shaft 7 by the respective chain4 whichdrives is of the'same diameter as the wheel 6.

In operation, assuming the chains'i i are moving in the directionindicatedby the arrows in Figs. 2 and 3, that is to say,"upw'ards on-the left hand side and downwards on the 1 right hand side ofthe elevator, asi shown insaid figures, the pieces of lumber to'be lifted,

' as for instance, in order to be collected in a pile, are place d on the carriers 12 at said left hand side ofthe' elevator and will be lifted by-said carriers, asthe chains move upwards.

, positioneven after the members 12, 13 have} jcome out of engagementwith those parts of the frame 3-which guide said members12,13,

When a pair of carriers 12 a piece of lumber 23, Fig, 3, resting thereon approaches the upper chainwheels 6 of the, elevator the abutments14=ofthe eount e'rweights 13 will V be engaged by the transverse arms 21 ofthe Q links l6 and caused-to remainonja level with reachi'other so that the-upper side of the carriers 12 willfpositively remain in a horizontal during theirv vertical movement. Therengage-merit between the bar 21.and the abut- V merits 14 will continue during the movement of the members 12, 13' around the upper half of the'chain wheels 6 and will cease when the members 12, 13, come into engagement with the stationary guiding lmembers. on the op positesideof the elevator.

. Onsaid opposite side ofthejelevat on 'that is to 'sayfon' the right hand side oft-he ele vator, as illustrated inEigs, 2' and 3, thev lumber is adapted to'be removed fromthfe;

7 carriers 12am delivered to the pile; To. this end a horizontal conveyor is providedwvhich arms 28'ada pt-ed normally tov be held inda horizontal position by means of stays 29, '29

detachablyconnected to thefarms28 and de-' tachably or 'pivotally connected to the frame- 25 inorder'to allow thearms 28 to drop down into; a verticalposition', as shownin respect c of thefleft hand side ofthe elevator,Fig.12, I a'conveyorframe 25 of the kind described bev e around the upper half of said upper chain ing provided ateach side of the elevator.

'- The" arms 28,; when held 1 in place by the f, 'stays29, 29, form brackets to carry endless ifigconveyor chains 30, :Said chains are driven by' chain wheels '31 at the inner end of the arms 28 and engage loose chain vwheels S2 at the outer end of said arms, as'shown in Figs. 4 and 5. The upper portions-10f said chainsproject slightlyr above the upper'sun 'facesof the arms 28. In'the extension of the arms 28 .a table33 may be provided to 'receive the, lumber when delivered from the conveyor chains at the outer end of the arms 28. The" drivingchain wheels 31 are carriedby a common driving shaft-34 mounted in the frame 25. Said drivin y from the" driving sha t 7 of the elevator I chains by means of a chain drive comprising Y a driving chain wheel 35 on shaft-7', a'chain I 36 heldin engagement 'withthe lower portion gagesl' sprocket wheelsL39i The chain 36 mb tends substantially along the entirehei'ght 10f frame fisolthat it may engage the wheel 38 shaft 34: is rotated ofrtheperiphery'of said wheel 35 by means; of two chain guidepulleys- 37 Fig. 2, andal driven chain wheel 38 on shaft'35.v Atthe lower; end ofthe elevatori t-he' chain 36 enirrespective of the vertical" position. of the:

conveyorframe 25.; The direction of movemove outwardly 'away from 'the elevator Y frame. The vertical portions of the chain 36" are guided by suitable guide-ways 40, Fig. 1, in order always to naintain the chain in en; gagement with the driven wheel 38. 'In-[operat1on,' the lumber Zcarried byffthe g V downwardly inovingcarriers 12 will be re- 1 ceived by the outwardly moving{upperportions of the c onveyor chains '30? and moved away from theelevator and, deliveredto the":

table 88 from which h p ators may take.

"the lumberto carryit'to'its place on 'thepil'e;

The conveyor situated on that side. of the ele- 1 vator,jat" which the elevator chains are for the, tii'nemoving upwardly, should be dropped to vertical position, as shown to the left "in Fig.2 in order not to interfere withLthe-up' 31.:In a' lumber elevator, in combination,

to said chain wheel shafts, links'connected 'riers to guide them during their movement wheels. r

with said elongated members to formlinked palra-llelograms, and means carried by'sa'id.

, parallelograms adapted to engage said car- 12,;

. v 911/ c mentof thechain 36 is such as to causesthe 7 upper portion of theconveyorchains some upper and lower shafts rotatably journalled in said frame, chain wheels on said shafts, endlesschains on said chain wheels, a motor operatively connected with one of said shafts to drive thesame, arms secured to said chain, carriers pivoted to said arms to, carry the lumber up along oneside of the elevator and down along the opposite side,elongated members rigidly securedto'the shaft of said upper'chain wheels, at least one other shaft parallel to said chain wheel shafts, chain wheels equal in diameter to said upper chain wheels rigidly secured to said other shafts and engagedby said chain to be driven at the same rate as said upper chain wheels, eloiigated memberson said other shaft, links pivotally connected with saidmembers to form linked parallelograms, and means carried by said links adapted to engage said carriers to guide them in their movement around the upper halfof saidupper'chain wheelsJ In a lumber elevator, in combination, an

upright frame, upper and lower chain wheels mounted with their shafts in said frame, end- 7 less chains on said chain wheels, arms securedto said chains,carriers pivoted to saidarms to carry the lumber up along one side of the'elevator and down along the opposite side, stationary guides secured to said frame adapted to guide said carriers during their vertical movement, cranksrigidly secured to said upper chain wheel shaft, similar cranks carried by at least one shaft parallel to said chain wheel shafts, links having a pivotal-con- V and down along the other side thereof, pins nection with said cranks to form at least one linked parallelogram, and means secured to said links adapted to engage.sa1d carr ers to guide them in their movement around the upper half of said upper chain wheels.

4. In a lumber elevatonin combination, an

upright frame, upper and lower chain wheels having their shafts rotatably journalled in said frame, endless chains on said chain wheels, projections secured to said chains,

carriers hinged to said projections to carry the lumber up along one side of the elevator secured to said carriers, elongated members rigidly connected withfsaid upper chain wheels, similar members carried by shafts journalled in said frame and parallel to said chain'wheel shafts, links connected with said elongated members to form linked parallelo- 7 grams having their corresponding elements parallel to each other, andtransverse arms on said links, said transverse arms being placed in such ELPOSltlOIl as to engagesa-idr pins for guiding said carr ers to a parallel movement around'the upper'half of said upper chain wheels." p j 5. In a lumber elevator, incombination, an upright frame, upper and lower'chain wheels having their shafts journalled in said frame,

endless chains on said chain wheels, arms se-V;

cured to said chains, carriers pivoted to said armstocarryithe lumber up along one side] bers,*,said links having forkgshaped lower;

ends, other elongated members icarried by-at; I 7 least oneshaft'paralleltosaidoha-in' wheel j shafts, journals on.saidilother members" to; engage the wer, fork-shapedyends of said links, said membersxand saidlinks'forming linkedupa rallelograms, and meanssecured to F said links in such a position as to engage Said i l carriers to guide them positivelyduring their movement around the upperhalf of saidup per chain wheels.

6. In a lumber elevator, in combination, a

carriage, an upright frame onsaid carriage, i

upper andlower shafts journalled in-sa-idfsi frame, chain wheels on said shafts, endless chains on said chainrwheels,amotor' con- ,nected with oneof said shafts to drive the same, projecting arms secured to said chains,

carriers pivoted to said projectingarms to carry the lumber up along one s'ide of the elevatorjand down along the-opposite side "thereof, counter-weights secured to the lower side of said carriersto hangdown below said projecting arms, pins on said counter weights,

guides secured to said-frame in engagement with said carriers to guide them during'their said upper. chain wheelsfand parallel with each other,cranks of equal length carried by,

at least one shaft parallel to said chain wheel vertical movement, cranks rigidly'secured to i shafts, links pivotixllyc'onnected with said cranks to form linked para-Holograms, and transverse arms onsaid links, said transverse arms being placed in such positions as to en-' are out of 'engagementwith said guides.

7 In a lumber elevator, in combinatiom'a gage said pins for guiding said carriers to a f parallel movement around the upper half of, said upper. chain wheels, when said carr ers carriage Ion wheels, an upright frame on said. carriage, upper and lower-and ntermediate shafts journalled in said frame and parallel to each other, upper'and lower and intermediam chain wheels of the same diameter on 'said shafts, endless chains ;on said. chain Wheels, a motoroperatively connected with I one of said shafts to drive the same, projecty ing arms secured to said chains, carriers piv oted to said projecting arms to carry the lum her up along. one side of the elevator and down along the opposite side thereof, counter weights secured to said carriers to hangdownbelow the points of pivotal connection with, said projecting arms,studs 'on said counter 'i weights, guides secured to sa d frame adapted to engage said carriers during theirverti cal movement only, upper cranks rigidly se-w cured to said upper chainwheels and parallel;

to each other, other cra-nksof substant'ially I the same len g th'seeurediie'said intermediate ehain" Wheels, links *rotatably journalled at:

their upper ends to said uppervcranks,-f0rkshaped. lower ends on said links, journals'on 7 name.

said' other cranks toengage the lower, f0rk-,

In' testimony whereof I have signed my I IGUSTAFVVLEOVNARDVKJELLANDQR.,7

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