US1616743A - Scaffold - Google Patents

Description

-rtnsw for Conveniently nd 331whichA are seeureditogetheri at'rghff l A.

' Weile A` tio provide aslcaioldjwhich may be yam-pivot ping'le tance substantially equal to the' diameter of the pipe 8,sov that the latter maybe inserted therebetween, and atan elevation above the members 18 is another pair of shorter but similar members 19, which are likewise spaced, andthe members 18 and 19 are connected together and Veach pair mounted in 1' the required spaced relation by members 20, 21and 22,the latter of which proj ect vsoinewhat'above the members 19 and are suitably spaced Ato engage against the lopposite sides f-'of the pipe 8 and-serve as guides to permit sliding movement of the frame along the pipe 8. The members 18 project at onek side beyondthe members 19 and carry a platform for supportingtheworkmen, said platform consisting of one oivmore boards 23, which Vas n` "'hav'ecleats extending across the under side'ladj acent each end to engage between the strips 18 of the sliding frames of two spaced standards forliolding the boards 28 against displacement?, rlhe outerv ends ofthe mein,l bers 18 Yare connected vby, an end cleat i25 y which serves to hold said members in proper spaced relation and engages thepen'ds of the cleats 24iso as to' prevent displacement lof the boards 23 endwise-froni the members 18..

. A 'platform' is alsoprovided V on the meinthe workmen, as. for example, the bricks and mortar in masonry construction, said platformconsisting of ak number of boards 26 connected ,to va drum 32 of a windlasswhich is journaled in a bracket 83 mounted on the other'guide ,22.*` This drumhas a ratchet wheel Sil at' oneend operableby apawl V35 fon aswinging armV 36v which jis pivoted on n the shaft 37 which carries tliedrnm 32, and

.the outer end of the arm 36 isfor'med Awith a sockettorreceive the bar or pipe38 which affords suiicientgleverage tov operate vv'the windlass.4 Aholdingl pawl 39 is pivoted on i lthe Ibracket 33 to engage the teeth'ofthe `ratchet wheel 23A-to look the drum in various positions to which it may be adjusted.Vv

A. large part of the work which isfrerquired k.to be yd oneon-scaffolds necessitates the. furnishing of materialsv to Vthe workmen on the sealfoldfrom-time to timerandinorder that this mayv be conveniently Ydone without interfering with. the workmen, :1j have constructedmy scaffold so that.; a -runway or platform] inayi-be .inountedat the opposite i side of the scaffold froml'the ,platform 23 on which 'thc'workmenstand.. lTo this end bers 191for'supporting the materials used vby there are extensions 40 which vare ,detachably secured by' bolts l1 orv other suitable'fastenings between the ends Aof the members 18V for supporting'boa'rds Ll2 composing the runway or platfornrr rihe outer ends-of the eX-v tensions a() are each provided with a U- shaped Istrap 13 through which a 2 n et or other suitable supporting post 111i may be inserted and cam i5 ispivoted betweenth-e two arms of the strap 43 so th'ata'vlien itisrotated to the position'shown by full lines in Fig. 1, it serves toiclampthe post againsttlie outer-end of the strap 43, the .saidoi'iter end being' rpreferably formed as shownfin Fig. 1, with edges whichV bite into the-.outer edge of the post 44 and insure a substantial first set yup adjacent the Yplace where the work is tok be' performed and .the sliding 'frames mounted on theistandards andthe platforms 26-27 and 23 assembled thereon connection the extensions '440 with the post'.V in using this scaffold the standards are.

with the latter arranged close to the location where the work is to be performed.V The" braces 14 however, are not installed and thiis permit the'sliding platform t'o Lbe arranged as shown by dotted lines in Fig. l, -veryclose to. the floor on 'which the standjardlsfare mountecha pair lof cleats i6 being preferably provided at the ends of the strip 2 and 'correiitting 5to aord arest for` the slidingmem- Y bers in the lowermost position..

eratedto wind up the'cable 31 and thereby raises the sliding framesV and the platforms thereon, so that the workmen may be'posi-v Asthe work' progresses the windla'ss isoptioned .at all times atthe'elevation" most con- 1 venient for llberformingvv the work." After thev seai'iolds have beenfelevatedv to al point abovetheopenings 16, the brace rodslllare then applied toreinforce the 5 standards yagainst lateral straindue to weight ofthe workmenand materials on'gthe elevated scaf-` fold. As thefwork begins, the platform 26.-'27 for thefmaterialsis suiiciently closeV tothe floorrso that the materialsV maybe -readilyl brought yup and placed ,onsaid'platf Yform from the floor,fbut as the scaffold is i elevated, it @is desirablef'to' have an elevatedl vplatformfor bringing up materialsto theV workmen.l ,'l'lierefore, after the scaffold has been elevated somewhat the extensions '40 are mounted inplace with theouterVV ends Aconnected with supports k@A and YVthe platform 4t2 assembled on the extensionsAO and 1 an inclined runway -inay-'be constructed 'jup to ythe platform'll2softliat materials may be Therefore, whenever the scadold is elevated, the cam member 45'is first swung to the. po-

sition shown by dotted lines inFig. 1 toreleasethe extensions4 4() VfromV the ypost lill and as the scaold iselevated the extensions ll() readily Vwheeled up` on to the' platform`-42. l I and deposited on vthe platformf`26-27.

spondiiigiii thickness to the'flange of the and platform 42 'are lilrevvise'elevated; and

. when the proper elevation 1 is reached, the camjmember 45 is returnedtothe position shown by-ull'lines' in Fig. l, to rclamp thevr` out en@ of the extensions@ to the; Sap# POFtiIlg post/14.1. 1Y

. The elevated platform is desirable in most constructionv Work to support the l l materials at an elevation convenient for the lo Workman so vthathe doesnothave to stoop over to take up the materials to be used in tlie Work,V butthis platform' 26-,27 may' oi course,v befdispensed Witli if desired and merely-"a single'platform provided. Y Y 15 I claim'was'm'y invention: Y

p'airof trame members on opposite sides of and Vextending horizontally 'at right angles 'toj'tlie upriglits, a platform'-lextending between' land j detachably connected- With;I the members Y on each' upright, jspacedl vertical parallel guides "on, diametrically opposite sides ofv Vsaid upriglitsjparallel thereto and v connected lto saidIframesmembers,,y a 'base-p vhaving an" upr1ghtfpinfrfor receiving each .upright tli'ereover, said uprights being 'of-tubular formation of uniform diameterto per# -mit tlieplatforin and frame members togjbe loweredto the base.

2. In aI porte ble scaold, arplfurlalf,v of

- Y f standards eacli Vhaving single uprightyal pair of y'frame members Von opposite sides otand extending.horizontally vat right 'angles to tlieuprights, ai platform ezdgen'dingvbve-V` tween and detacliably oonnected Witlifthe f tlie 'vvi'ndlassv is actuated. f v

Vliil'e I have shown Vand)described myin-A venti'on in a preferred form, I am] aware that various changes` and modications may be made Without departingvromtheprinci-j ples Vot my invention, Vthe Scope of-vvhicli is to be determined zby the appended claims.

Y 1..' In a portable 'scali'old a pluralityl Q standardsV e-afcli liaving a single upright, a,

Y members on each yup-right," spaced vertioal parallel guides on diametrically oppositev of. the yframe membersk and sides of said uprightsfparallel thereto and conneotedto saidframe members, ya-base on v .which eacli-V upright is mount/ed,l al Windlass ,Y v0in each/pairy of guides, vafslieave mounted 'on n the upper end of eacli'fiupriglit,fanda cable' f connected; to each ywindlass and etending overa slieave VWitlitlieopposite end of 'each Y .cableanclioredto cause raising or lowering platforms when nectedv to the' Vw'vindlasses `and trained over,

Wlienfthe `Windlasses are operated,lv a second platform disposed laterallyfrom andinovableVV verticallyl .with the first platform,l` yup-v 'tlie sheaves, the opposite ends of the vcables 'being connected' to'l the guidesontliefoppof site sides ofthefupriglits to cause"raisingvffgi andlovvering ottlife frames and 'platforms y right posts for,supporting tlie outer extremrity of .the second'platform, andI detachable clamping connections carried by the outer,l

end Vot the seoondplat'form-and movable-VV Vover ltliefposts or operativeto clampsthe 'posts and support'thepouter ends oiftli'es'ec-Q 'ondplati-orm. Y i

Images