US1590990A - Gantry crane - Google Patents

Description

' June 29 1926'.

Filed July, s, 1924 2 sheets-sheet 2' alla@ Patented June 29,1926. Y v UNITY-ED@ STAT y CLAUDE. FULLER, or new yrean, rg., Assrenon'r'ofnnw YonK Bannifiraiviar.;ti\ievr CORPORATION, or` NEW Yon1;,v1\r.j.,ga conrona'rron oF vNEW-'roma Y thepurpose of'moving such crane along the GANTRYCRANJEQ* H ApplicationY v'filed lJ i113): 8',

My fpresent linvention relates tolcran'es,

Y Wheels on which the crane is supported for lrackswv'ith which itisv associated.. This meth'odof construction renders the cost of a crane of this type so', high as'to preclude its.

f Ause in situations yto f which it is 'admirably adapted:vv @ne 'of such ysituations 'is in'ooniiection with the unloading vof ybriclr'sffroinv barges Where the char'acte-r'of the material 'Y is such as to prohibit, from af mechanicaldriving mechanism for gant-ry cranes and in which such driving mechanismv no 'connec-Y tion Whatever yis Vmade toi-the Wheels'fsupvlporting the crane. y so'const'ruct my device and wound -fa plurality of ropes or cables,. such ropes or cablesbeing Aajnchored'atone` as to have the4 crane driven in eitherl direc tion from asingle drum on Wlnchis-secured end' ofthe track and the other c'able'being anchored at theother :end of the track.` By rotating suchl crane through al Worin'gear operated byv anelectric motor, the rotating;

ofthe drum is yprevented except yby means of the motor and the cables extendingtd Y Y Y 82 in each lofyvhieh frames is rotatably Vmounted a pluralityof flanged'wheels `33 eithery end ofthe track act as brakes or locking devices 'forV the gantry, `"sihich vis lthus locked inposition against Wind pressure or any other outside cause.

. The object of-my `invention, therefore, is an improved propelling mechanism forV gantry cranes and the like.'Vv

In theaCGOmpanying drawings illustrat-` ing a preferred embodiment ofmy inven-` Ltion, Y

Fig. l is an end elevation; y Fig.' 2 is a frontV elevation, and y y Fig. 3 is a fragmentary detail plan view of the driving mechanism.'v l

l Referring to the drawings, 101 dock or `wharf on'the top of which are 'are *ranged tracks ll running parallell to, and spaced apart from, each other any suitable or desired distance. The tracks 11V are of any convenient or desired length, as is usual.

secured* a lblock '371, but; one of lwhich is l, shown, in order to prevent overrun.' ofthe designates a y 1921i-,I serial m5724382.' l

suchp'ositionby crossbra'ces 14, l5,v and 16 Aspaced apart from eachother andV held in" and strengthened; by the lusual braces 17e-41,8.;l

described' arer` utilized,'.and extendingv be-A tweenv the frame 'structures `on each side2 thereof arebridgefgirders 19fand a-bridge 20, .the entirev structure thus far' described Two such framestructuresas have justV been l constituting ,a'bridgerfor'thecrane' vFormed4 integralwith the bridge and extending lat` orally outward "therefromf is a j ib member 21, formedin. the usual manner. v'The jib member 16. `lVfount-edito run 'on'the rails '22'. i

"frame members havesecured toV the top sides are Wheels 23 supportingfa frame 21lonf Whichis mounted' av hoisting gdevice 25, land atthe UloWer'endofthe cables'26 of such crane YmemberV is a' devicey 27'? for lifting la unit stack of fbrick 28 from `:the yload, 'of

V)briclrs 29"onfthebarge30 vlying along side off, va.nd'secured,.to, thevvharf10i`r` The crane mechanisml 25 isfoperated "thfej'usual vInan- Y ner, `and f as the'construction of suclr operating mechanism Vforms no partoffthegpres'ent invention, 'it has l not fbeenl illustrated y. and

Will not beffurther described.vrr yOnthe out-l f Y Ward endiof eachfof the *jib niembersf21 is carriage 24.

ofthe bridgel has secured thereto a frame which run on the rails l1.l From the above it- Will be yobvious that the structure 4is capable of moving along'thefrails ll so as to bring the hoisting mechanism '-25 into any.V

position relative to the leadfof bricks 29,011",` the barge 30.V .In'orderf to move theystrucf lying4 practically centralfwith respect `to thev ilprights 12 and'1342-7111'theiframework is arranged shaftsv '36, v37, and 3811 On'lthe ture along the rails 1,1, I provide a platform f of framework'll lsecuredfto, orisuspended Y from,` the crossL bracesd? fin* any Vsuitable manner, as bybrafce, such frame structure and is driven' by, a; pinionel" secured tothel Y shaft 37 Also secured*tothe shaft 137jis ay gear 42 which meshes with', and is driven by, a pinion 43 secured to the shaft 38, Also secured to the sha-ft 38 isa worm wheel 44 which meshes with, and is driven by, a worm 45 secured to, `or termed integral with, the

shaft 46 of -a-n Jelectric motor 47. The gearing 40-46 inclusive forms a reduction gear to wind pressure thereon or y troin otherV CHUSGS.

VVOund around the drum 39 and occupyingV but portion of the length ot'such drum is a cable 48, onelend 'of which isanchoredfat 49k at one end of the tracks ll and thegother end is anchoredcat 50 to vthe other Yend of such tracks vl1. It is obvious from the above and from an inspection ofV the drawings that,

, if the gear 40 is rotated' so .as lto rotate the drum 39pm any direction, the rotation of 'i such drum will pay oil one end olf' lthe cable 48 andwind onthe other end of suchA cable. Near leach end 'of 'the rope at the anchoring points 49 and :50 .are turnbuckles 5l and by means of whichgslack in the rope or cable 48 maybe taken up., l Y A y It is obvious now that, it the drumk .39 is rotated either direction, a certain amount of one'end'ot the cable 48 is wound upon the Vdrum 39y and an equal amount'o't 'the Yother' end `is unwound.

y y 'Should'th'e rope or cable stretch, the .turnbuckles 5l ywill take up 1 all ,slack therein. Y

The operation of my iinproveddevice is as follows. -The gantry crane vconstructed as above described and mounted for movement over the tracks ll is controlled in such Vmovement by an operator whooperates the Acontrol properly Ioperating the motor. 4??, ithe'druni Vmotor 47 in the usual manner. .The power circuit and control apparatus for' such motor is not shown as such form ot connection and is well known in rthe art. By

39 is rotated through the train of gearing A-'4-6 inclusive to wind up one end of the cable 48 on one end of Vthe drum and unwind an equal amount of cable on the other end of the drum, causingrthe gantry crane structure `to be moved longitudinally 'ofthe tracks 11. Because or" the reduction gearing 40-46 VVand the worm and worm ' wheel 45 and 44 respectively, the device for moving the crane along the tracks acts :as a braceor brake to prevent accidental movement ot tlgieicrane.

Having thus described 4my invention, vwhat I claim as new is:

bridge, tracks on which t'he wheels are placed for longitudinal movement thereon, Va cable,

anchoring means for said cable whereby the cable is anchored, one end' at ea'chen'd ot' the track, a drum rotatably mounted on the bridge-and independent ot the wheel mounting, a driving motor, a reduction gearing interposed `between the motor and the drum, said drum having the intermediate portion of the cable wound thereon and whereby rotation ot the drum in either direction will cause a winding up of one end of the cable thereon and a simultaneous paying'oiif of an equal .length of vthe other end ot the cable therefrom, saidV reduction gearing, drum, and cable acting as a braking device toV prevent accidental longitudinal movement 'of .the bridge on the rails. v Y

In testimony whereof, I have signed my name to this specic'ation.

omino E. FULLER,

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