US2658803A - Scaffold - Google Patents

Description

Nov. 10,1953

c. F. LONG ETAL 2,658,803

SCAFFOLD Filed April 15, 1950 2 Sheets-Sheet 1 0w! Illozg and Hwrwyi'. Abek ATTORNEYS Nov. 10, 1953 c. F. LONG ET AL 2,658,803

SCAFFOLD Filed April 13, 1950 2 Sheets-Sheet 2 26A m INVENTORS 3 27 r,""' Charla; Eloy ma 3 M Emmy B45658 F A BY m mgow ATTORNEYS Patented Nov. 10, 1953 UNITED STATES e-ATENT ()FFICE Charles F. :Lo'ngand Harvey E..A=b'eis, Washington, D. G, i

Application April1'3, 1950,, 'Serial No. 155,718

This invention relates to scaffolding, and more particularly to a portable scaffold adapted to be readily shifted by a single unskilled laborer from place to place with complete security in operation, thereby eliminating the necessity for skilled riggers or carpenters.

In connection with modern construction practices and building business, it is customary to construct concrete buildings in the form of a succession of concrete floors spaced and positioned 3 that work it is necessary to have scaffolding se- Y curely positioned exteriorly of the building in alignment with such openings or spaces. Various expedients have been resortedto, but the most commonpractice is to utilize scaffolds depending from upper floors or scaffolding erected from the ground, and in either "case skilled mechanics areessenti'al and the cost of the scaffolding is high.

An object of the present invention is to provide an improved and simplified scaffold unit which, in conjunction with other similar units, can be successively positioned as the work progresses along the face of a buildingby the utilization of movable floor boards and railings so that as the work progresses one unit can be removed as the work adjacent thereto is finished and.

shifted to a position in advance, thus permitting the work to continue successively the full length of a building on a floor, and only unskilled labor *is necessary for such shifting'of thescaffold units and extension of the scaifolding progressively jthroughout the length of the building.

Other objects will more particularly appear in the course of the following detailed 'descrip-. tion.

The invention consists in the novel construction, arrangement and combinations of parts "hereinafter more; particularly" described and claimed. 1 I

'Two sheets of drawings accompany this specification as part thereof, in which like reference characters indicate like parts throughout.

In the drawings: 7 #1 Figure 1 is a fragmentary front elevation of a "portion of a build-ing showing the window-open 2 Claims. (01. Silt-I243) ing space and two units of the improved scaffoldiing position;

Figure 2 is a transverse cross section taken on line 2-2 of Figure 1;

Figure 3 is a horizontal cross section taken on line 3-3 of Figure 2;

Figure 4 is a fragmentary rear view partially broken away of the upper end of the improved scaffold unit;

Figure 5 is a side elevation of a modified form of the standard used in the improved unit; and

Figure 6 is a transverse cross section taken on line 6-6 of Figure 5.

Referring more particularly to the drawings, the reference character F indicates a portion of a concrete floor structure, while the reference character A indicates a depending apron integrally cast with the floor F and constituting a spandrel beam. This type of structure is commonly utilized in the modern construction of office, apartment and other large buildings. In connection with such buildings the floors F are supported by spaced piers (not shown), but these piers are spaced relatively far apart so as to define with the spandrel beams relatively large openings in which are subsequently positioned wall structure and a plurality of window frames, and it is also customary to overlay or veneer the outer face of the suitably waterproofed spandrel beams with marble or other ornamental material, to present an attractive face to the build- .mg l

The present invention relates to a readily portable scaffold unit which can be selectively positioned within the opening described at successive positions throughout the width of the building, adapted to support scaffold boards I9 which can be shifted as the work progresses, from one end of the building to the other, it being contemplated that a plurality of such scaffold units will be utilized andthat as the work progresses from one side of the building to the other, the

rearmost unit will be withdrawn and moved ahead so that the scalfold can be progressively extended from one side of the building to the other, as desired.

' the workers employed thereon,this movable scaffold unit is constructed of two spaced standards lherein illustrated as being secured in fixed parallel relationship, as by a plurality of rung members 2, and braced to assure their parallelism as by brace members 3. The upper ends of the .position.

projecting arm unit, as, illustrated in Figure 1.

end of the joists it are'rigidly secured rail posts 3 vertical standards I are bridged by a header 4, herein illustrated as of channel cross section, and

. this header is slotted adjacent each of its ends 7 to permit the passage of a plate or strap 5, the

lower end of which abuts against the rear face of the standard I and is secured in rigid position' by means of a bolt 6 which also secures the header 4 to each of the standards I.

At the bottom of each of the standards I is positioned a journal 2! for a ground contacting 7 wheel 22 and these journals 2I are so positioned on the standards I that when the standard is in its'operative vertical position the wheels 22 will be out of contact with the floor F, but that by tilting the entire scaffold unit rearwardly, as illustrated in dotted lines in Figure 2, the ground contacting wheels 22 will be brought in contact with thefloor F interiorly of the building, thus permitting an unskilled laborer to wheel the unit" backwardly and shift it along the floor to its new To the bottom end of each of the standards I is also secured a forwardly projecting: arm 7,

herein illustrated as of channel cross section, the forward end of this arm being formed with a plurality of transversely aligned holes 8 in its ilangesthrough which a pin or bolt 2; can be inserted in parallel relationship to the standard I, this pin 9 being adapted to engage the outer face 7 of the floor F or the apron A to resist effectively any inward thrust against the lower end of the standard I., It will be understood that each of the standards is provided with such a forwardly The two standards support intermediate their ends forwardly projecting joists It which joists ,are herein illustrated as rigidly secured in perpendicular relationship to the standards I as (by diagonal braces II and angle'plates SI. The joists it are further secured by a permanent platform 58 extending from joist to joist and upon which can be laid scaffold boards l9 adapted to extend from scaffold unit to scafiold At the outer l'il'which are suitably braced as by diagonals 53,

land adjacent the upper end of each rail post are secured on its inner and outer faces rail plates I l-4 3 which extend above the end of the post 'i 2, providing a seat within which rail members 29 can be positioned, such rail members 253 i also extending from scaffold unit to scafiold unit.

Eye-bolts it are preferably associated with'the standard I and the rail post I2 in parallel relav.tionship to the platform I8, and a chain or similar guard it can, if desired, be hung between such eye-bolts.

Each of these units can also spaced: beams 33 resting'on' the joists It,i3 adjacent the rail -posts,,which beams arespanned be provided with ber I and the extension members and 26, so that these extension members can be adjusted to vary the length of the elfective standard and the position of the platform as desired. In this construction the forwardly projecting arms I are secured to the bottom extension members 25, while the extension straps or cleats 5' are se-K cured to the upper extension members 26. The platform and bracing members will be secured, as in the previously described form,'to the central main portions I of the standards.

To prevent any lateral tilting of the scaffold unit which could never amount to much, butwhich might give a sense of insecurity, nuts 29 can be welded within the header member 4 in association with orifices in the web in said header member to permit the operation of bolts 30, one positioned adjacent each of the vertical standards I-i, and by tightening of these bolts against the under face of the apron A, any possible slight movement of the scaffold unit is Y effectively prevented. The device is entirely love bridge member an supporting a block and" a fall 32 by means of which supplies can be ready ilyraised or'lowered, thus permitting use of each unit as a portable outrig for hoisting. v

To permit the use of the same scaffolding units with a plurality of different buildings of varying room heights, the modified form illustrated in Figures 5 and 6 for the standards may be conveniently employedi In this form the 7 standard I is formed of tubular'cross section with tubular members 25 and 25. These tubular members "I, 25 and 25'are telescoped and ad- 7 'justa bly. positioned with respect to each other, as by means of bolts 28 extending through comlplementary holes 21 passing through the memstable and secure without the use of such tightening bolts, and their use is optional.

an unskilled laborer in the position illustrated in dotted lines in FigureZ to the position illustrated .in that figure, and thereafter tilted into vertical position, thus bringing the upwardly projecting straps 5 into contact with the inner face of the apron A associated with the floor above. Conversely, the scaffold unit is removed by tilting the unit rearwardly as indicated by, the arrows in Figure 2, thus bringing the ground contacting wheels 22 into engagement with the floor, thereby permitting the withdrawal of theunit and its removal to a position further down the building.

Variations in the structural details of the unit will readily suggest themselves to those skilled in the art, but within the scope of the present I invention as claimed.

secure a pin' parallel with but spaced forwardly :of the adjacent standard, a header of'channel cross-section-connecting the upper ends of the standards, said header being formed with slots adjacent the rear face of each standard, plates secured to'the rear facejof each standard and projecting through the slots in the header above and parallel with each standard; arms rigidly secured to each standard intermediate its'ends and projecting forwardly thereof, a platform mounted i V on said arms, rail posts securedto the outer ends of said arms, rail cleats secured to'the outer and inner faces of each rail post to form a seat for removable rail'sections and locking bolts screwable through said header adjacent each of the standards adapted to exert upward pressure against overlying building structure to stabilize" the scaffold against lateraltilting; a

2. Scaffold comprising spaced 'parallel'stand- .ards, ground contacting wheels supported in bearings adjacent the lower ends of said stand- In' operation, a scaffolding unit'is rolled by ards at the rear sides thereof, so positioned that said wheels make ground contact only when said standards are inclined at an angle to the vertical in the direction of said wheels, arms of channel cross-section rigidly secured one to the lower end of each standard and'projecting forwardly perpendicularly thereto, arranged with their flanges extending laterally, each of said arms being provided with registering holes through both flanges axially parallel to said standards, pins through said holes projecting below said arms, a header of channel cross-section connecting the upper ends of said standards having its flanges embracing the opposite sides of said standards, with the rear flange slightly spaced from the adjacent side, a slot in the web of said header back of each standard opening into the space between the rearward flange and said adjacent side, plates extending through said slots into said space and projecting above said header, a bolt through the flanges of said header, each plate, and the embraced end of each standard, for securing said 6 plates, arms rigidly secured to each standard intermediate its ends projecting perpendicular thereto, forwardly thereof, and a platform mounted on said arms.

CHARLES F. LONG. HARVEY E. ABELS.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 337,225 Anderson Mar. 2, 1886 786,054 Roy Mar. 28, 1905 980,532 Johnson Jan. 3, 1911 989,466 Wright Apr. 11, 1911 1,086,348 Bolognesi Feb. 10, 1914 1,707,894 Bergesen Apr. 2, 1929 2,392,584 Falkenstein Jan. 8, 1946 FOREIGN PATENTS Number Country Date 2,935 Great Britain 1881 278,749 Italy Oct. 18, 1930

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