US2396143A - Cargo crane - Google Patents

Description

March 5, 1946. N. P. E. Al\ |DERSEN 2, 1

CARGO CRANE Filed-Feb. 18, 1943 5 Sheets-Sheet l f INVENTOR.

ATTORNEK March 5, 1946. N; P. E. ANDERSEN 2,396,143

' CARGO CRANE Filed Fb. 18, 1943 5 Sheets-Sheet 2 M M M QEZX March 5, 1946. N. P. E. ANDERSEN 2,396,143

CARGO CRANE Filed Feb. 18, 1943 5 Sheets-Sheet 5 II] W m 792* M ad fl mu I v 14 TTORNE). v

March 5, 1946. N.P. E. ANDERSEN w2,396,143

' CARGO CRANE I Filed Feb. 18, 1945 s Sheets-Shet 4 INVENTOR.

ATTORNEY.

Ma rch 5,1946. 7 N. R E. ANDERSEN 96,

CARGO CRANE Filed Feb. 18, 1945 5 Sheets-Sheet 5- I INVENTOR.

I l fi ment). I

just described and the corresponding parts thereof are designated by the same numerals as those applied to the runway structure first described.

luff tackles for lifting one of the elevatable members I9. The forked luff tackle engaged by block 30 is made up of cables 33 and 34, while that engaged by block 3| is made up of cables 35 and 35. Considering now the luff tackle engaged by block 30, cable 33 passes first to block 31 secured to the deck 6 near the base of an overhead runway support from which it passes free- 'ly upwardly through an aperture in the end of member I9 to a two sheave nest 38 secured in the overhanging end of overhead runway member 8. From there the cable 33 passes to sheave 39 secured to the end of the member I9, and re- For the purpose of extending the transverse runways beyond the sides of the vessel; overhanging members l2 and I3 may be provided. These overhanging members are of known construction and may be hinged, if desired, by means not shown and forming no part of this invention, so as to be swung from the position shown into a position; in alignment with the rail of the vessel when they are not in use.

[Secured along the upper face of the runway members 'l,*8, l2 and I3 are rails M for carry in'g the'rolling-ends of a'crane bridge l5. Adjacent the rai1s l4 are racks I6 with which gears rotatablycarried uponthe rolling bridge -may engage to-insure positive control of the movement of the bridge in spite of any listing of the 'vessel-whichmay occur by'reason of the handling ofcargo or otherwise. a Each of the overhead run-ways also carries an additional set of racks l1 and rails M3 for the accommodation of similar bridges l5 shown infragmentar'y form only. Between the ends of the runway members 1 andB-and in alignment with the rails and -racks l4, l6, Hand 18 carried thereon, are elevatable runway sections l9, one for each of the sets of rails and racks l4 and I6 and I1 and 18 so that the same extend continuously across the elevatable sections l9 when in raised position as appears clearly in Fig. 3. V Secured to the inboard faces of columns 3 and. 4 are vertical guiding ribs 20, adapted to be slideably engaged by forked ends H of the members: I9 so that the latter are guided for vertical sliding movement as appears more clearly inFig. 4.". For controlling .and effecting this vertical sliding movementa'system of hoisting cables to. be described hereinafter is provided. In the particular form of the apparatus herein illustrated and described, the longitudinally extending, traveling bridge is provided with rails uponwhichtwo self propelled hoisting trolleys 22 and 23 are carried. Trolleys 22 and 23 arev provided with hoisting drums from which hoisting lines 24 and 25 extend downwardly,normally for the purpose of engaging and lifting the various loads to be handled, as for example as vappears in Fig. 1. However when the bridge and; trolley assembly, including the elevatable runway sections l9, is to be lifted from the position shown in dotted lines in Fig. 1 to the level offthe. overhead runway or lowered therefrom,

the hols-ting. lines 24 and 25, may be unreeved from blocks 58' and passed downwardly through .blocks 26 and 21, respectively, secured to the deck 5 of the vessel,"as appears more clearly inFigs. 2 and 5. The hoisting lines 24 and '25 then pass respectively, as appears in Fig. 5, to blocks 28 and 29;-likewise secured'to the deck 6 of the vessel, and thence through blocks30 and 3| respectively, to dead end connections 32 and 33 respectively,'rigid1y attached to the deck 6'. a

Each of the blocks 30and 3i engage forked ner the cable34 extends through the blocks 40 turns to the nest 38 and again passes to the sheave .39iw-herefit is dead ended. In like manand 4| to the nest 42 and the sheave 43 at the opposite end of the member I9, to complete the liftingand lowering arrangement for this member. In like manner the other forked lufi tackle for raising and loweringthe opposite member I9 is reeved by passing its'branchic'able 35.through the blocks 44 and 45 to the nest 43 and the sheave 41 and by passing the branohoable 36 through the block-48 to thelnest 49 and lsheave 50. Thus, Whenthe'drums of the trolleys 22 and 23 take in cable, by; winding; themembers l9 rise and lift the bridge l5 to-,the level: of the. overhead ru'nway. Lowering is accomplishedby the opposite motion. j i I When the members H are? brought'to their extreme upward position inwthe manner just de-.- scribed, conical seats 5l secured to the'overhead runway members 1 and-8 are engagedby conical plug members 52,- secured to the vertically movable members l9 as appearsparticularly at theleft hand side of Fig. 4. At the samejtime bolts 53 :pass through the openings provided therefor in the seats 5I.- With the parts in this position nuts may be run on to the bolts 53 and the member IS -locked rigidly inposition. This lock is provided at both ends of the member l9 and in this way the racks l6 as they extend across the juncturebetween the permanentoverhead runway members and; ii and the elevatable member [9 are precisely positioned so that there is noalteration in pitch at the juncture. When the members IQare, to be again lowered the nuts are removed from the bolts 53, and prior to their removal. the hoisting lines 24 and 25 are rereeved in the manner illustrated in Fig.5 so as to bear'the' load otherwise held by the bolts 53.Lowering of the entire structure isv then accomplished by paying out cable from the drums on trolleys22 and '23 until the lower ends of members I9 engage ledges 54 provided as a supportifor' the entire-elevatable structure. when in lowered position. Y 1

Control the variousmovements' of the crane is regulated throughcontrol box 55 carried near the middle of the bridge l5 and electrically connected with the several motors in known manner. As shown in Fig, 2, a platform 55 is'secured beneaththe control box. 55 for the accommodation of the operator, from which position he may observe the load as it is'lifted'from the hold as well-as when it is beingihandled on the dock 51 beyond theside of the vessel; The control platform 56, however, 'becauseof its downward projection interferes, when in norinal'position, with'the lowering of the bridge I5 to the position intended. For this reason platform 56 is divided along its center-line and pivotally mounted at its upper oornersso that it maybe swung to the position indicated by dotted lines in Fig.

stijbose, or tha er eriui lie sari a stews "a resend hoists teem me pl ect aise erl er the em s alsbapparent'thateithrorieof thetrolleys 22 or apparatus are; f g

23 may be employed singly through appropriate bination with ship h'a reeving to perform the entire hoisting or lowering spaced, parallel, substantially horizontal overhead operation, and this alternative is contemplated runways secured to the deck, a traveling crane particularly in those cases where it is found debridge extending from one of said runways to the sirable to employ but a single trolley upon the other and adapted to move along the same, hoistbridge 15. ing means mounted on said crane bridge, said While this invention has been herein described runway being provided each with an elevatable by reference to a specific instance of its embodisection disposed opposite one another and adapted ment and use, it is intended that the protection to engage and support the ends of said crane to be afforded be not unnecessarily limited therebridge in a preselectedposition, means for guidby, the intent being that such protection shall exing said elevatable sections for vertical movetend to the full limit of the inventive advance disment from their overhead position to a position closed herein as defined by the claims hereto ap- 25 adjacent the deck, and means adapted to be enpended. gaged and actuated by the hoisting means on said I claim: bridge for causing said elevatable sections to be 1. In an apparatus for the handling of cargo, raised or lowered simultaneously.

the combination with a ship having a deck of. 5. In an apparatus for the handling of cargo,

spaced, parallel, substantially horizontal runways the combination with a ship having a deck of secured to the ship above the deck, a traveling spaced, parallel, substantially horizontal overcrane bridge extending from one of said runways head runways secured to the deck, a traveling to the other and adapted to move along the same, crane bridge extending from one of said runways said runways being provided each with an elevatto the other and adapted to move along the same, able section disposed opposite one another and hoisting means including cable winding means adapted to engage and support the ends of said mounted on said crane bridge for rolling engagecrane bridge in a preselected position, means for ment therewith, said runways each being proguiding said elevatable sections for vertical vided with an elevatable section disposed opposite movement, means adapted to cause simultaneous one another and adapted to engage and support vertical movement of said elevatable sections, and 40 the ends of said crane bridge in a preselected pohoisting means mounted upon said bridge for sition, means for guiding said elevatable sections movement thereover. from their overhead position to a position adja- 2. In an apparatus for the handling of cargo, cent the deck, and hoisting tackles associatedthe combination with a ship having a deck of an with said elevatable sections adapted to be enathwartship horizontal runway disposed above gaged and actuated by the cable winding means the deck, a second athwartship horizontal runon said crane bridge for causing said elevatable 7 way disposed above the deck, a traveling crane sections to be raised or lowered in unison. bridge extending longitudinally of said vessel from 6. In an apparatus for the handling of cargo,

one of said runways to the other and adapted to the combination with a ship having a deck of move along the same, said runways being provided spaced, parallel, substantially horizontal overhead each with an elevatable section disposed opposite runways secured to the deck, a traveling crane one another and adapted to engage and support bridge extending from one of said runways to the ends of said crane bridge in a preselected inthe other and adapted to move along the same, board position above the deck, means for guiding hoisting means mounted on said crane bridge, said elevatable sections for vertical movement means associated with said runways and comprisfrom their overhead position as a part of said runing oppositely positioned elevatable sections ways to a position adjacent the deck, means thereof for causing vertical movement of said adapted to cause simultaneous vertical movement crane bridge to and from the level of said runof said elevatable sections, and hoisting means ways, and. a control platform for an operator mounted upon said bridge for movement there-- mounted upon said crane bridge, said platform over in a direction parallel to the longitudinal dibeing movably secured to said crane bridge to perrection of the vessel. mit the same to occupy a normal operation posi- 3. In an apparatus for the handling of cargo, tion extending below the bottom of said bridge the combination with a ship having a deck of an and a stowed position above the operating position t wa ts p horizontal runway disposed ove as to permit said bridge to be brought close to said the deck and forwardly of a hatch andadapted to deck when stowed.

extend bey d the side of the ship, a second 7. Cargo-handling apparatus for ships comprisathwartship horizontal runway disposed above the ing in combination a pair of rails elevated above deck and aft of said hatch and adapted to exthe deck of a ship, a hoist-carrying member tend beyond the side of the ship, a traveling crane 7 bridging the same, a cargo hoist carried by the bridge extending i in lly ofsaid vessel from hoist-carrying member, driving mechanisms for one of said runways to the other and adapted for the hoistcarrying member and the cargo hoist athwartship rolling engagement therewith, said mounted on their respective units, rail sections runways being provided each with an elevatable intermediate the ends of said rails, and power section disposed opposite one another and adapted driven elevating and lowering mechanism for sup- 7 mediate its ends with a movable section of sumcient length to accommodate the hoist-carrying member, power driven mechanism for lowering the said movable railsections below the horizontal plane of the main portion of the rails, together with the hoist-carrying member and the cargo hoist, and locking mechanism which is independent of said raising and lowering mechanism for locking the rail sections and hence the hoist-carrying member and cargo hoist in elevated position.

NILS PETER ERIK ANDERSEN.

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