US 2062473 A
Description (OCR text may contain errors)
Dec.1,1936. E H, NQRTON 2,062,473
- INDOOR PORTABLE SCAFFOLD Filed Jan. 21, 1935 2 Sheets-Sheetl 2 l INVENTOR fw d4/W.
Patented Dec. 1, 1936 UNITED@STATES;
PATENT- oFrlcE- This invention relates to improvements in scaffolds, `and is especially designed for use in indoor work, and --to provide-'a platform, whichl may be i extended horizontally, and supporting legs, which maybe-extended vertically, whereby the platform l may be adapted for supportingworkmenai dif-,- ferent elevations.v
Another object ofthe invention is the provision of vascaifold of this type, having improved slidpeeing interlockingconnections .between the-frame members whichsupportjtheplatform;
A still'furtherobject of theinvention is the provision .of a scaffold having. an. extensible top or platform, and vertically adjustablev legs. con-- 1.; structed to fold under the platform, to make the entire device easily portable from place to place. With the above and other objects inf view, the invention relates to -certain new and useful constructions, combinations, and arrangements of 20 parts, clearly described in the following specification, and fully illustrated in the accompanying drawings, in which:-
Fig. 1 is a side view, showing the scaffold in upright, open position. :5 Fig. 2 is a top plan view thereof.
Fig. 3 is an end view thereof. Fig. 4 is a side view, showing the scaold in folded position.
Fig. 5 is a horizontal sectional view, taken on 'zo line 5-5 of Fig. 1, looking in the direction of the arrows.
Fig. 6 is a transverse sectional view, taken on line 6 5 of Fig. 2, looking in the direction of the arrows.
Fig. 7 is a detail side view of a folding brace and the related parts.
Fig. 8 is a detail sectional view, taken on line 8-8 of Fig. 1,. looking in the direction of the arrows.
4o Fig. 9 is a horizontal section taken on the line S-B of Fig. l and showing a top plan view of a pinion shaft and leg operating crank handle.
Fig. 10 isa detail sectional view, taken on line .l IU--I of Fig. 12, looking in the direction of the 45 arrows.
Fig. 11 is a fragmentary sectional view, taken on line II--II of Fig. 12.
Fig. 12 shows a fragmentary detail of the plat- K form, including a section joint.
ff 0.- Referring to the accompanying drawings, illusdisposed in parallel relation, and spaced laterally from each other. The inner side of the bar or member 'I is equipped with a metal runner 9, 60 which is dovetailed in cross section, and the inner side of the bar or member 3 is equipped. with a similar-metalrunner Ill, .of similar shape.'
'I'heleftplatform section is equipped with parallel bars or members II and I2, which are bolted or otherwise fixed thereto. The inember or bar 5 I-Lisequipped with a metal runner I3, of dovetailed constructiomand the member or bar I2 is y equipped with a similar metal runner I4, of'dovetailed construction.-
' A metal or otherrunner or slide'IS is arranged 1o" to work'between the. metalrunners 9. and I0, and thsmetal runner or'V slide 4Huis-formedwithdovetailedlongitudinal groves I6 and II, formed in the: opposite sides thereof, .which .receive the dovetailed runners 9 and Ill. A'stop I8 is pro- 15 vided for limiting the longitudinal play between the slide I5 and the runners 9 and I0'. 'I'he metal slide or runner I5 is connected to one end of the cross bar or plate I9, and the other end of this bar or plate is connected to the metal slide or runner 2II, which is formed with dovetailed grooves 2| and 22, on the opposite sides thereof, which receive the dovetailed runners I3 and I4.
The cross bar or plate is provided with a supporting leg, which includes the upper section 23,
and the lower sction 24. The upper leg section is formed with a vertical slot 25 and the lower leg section is formed with a series of vertically spaced holes 26, each onevof whichis adapted to receive the bolt 21, by means of which various vertical adjustments may be obtained. The two leg sections are clamped against relative movement by means of the thumb nut 28, and the leg sections are held against accidental sliding by means of the corrugated meeting faces, not shown, formed on the engaging sides of the two leg sections. 'Ihe lower end of the leg section 24 is equipped with a floor pad 39. The upper end of the leg section 23 may be folded against the bottom side of the platform, by loosening the pivot clamping bolt 3I.
The outer'end of the platform section 5 is equipped with upper leg members 32 and 33, which are pivotally connected to the outer ends of the platform section. Brace members 34 con- 45 nected by pivot bolts 35 to the leg members 32 and 33, are constructed with side edge opening slots 34a, which are designed to hook on the clamping bolts36, and are clamped in place by means of the winged nuts 31, threaded on the ends of the bolts 36. The leg members 32 and 33 are provided with extension members 38, which are adjustable thereon, by means of the clamping bolts 39 and nuts 40. To assist in simultaneousl ly adjusting the leg members or extensions 38, and
38a, a gear 4I is arranged on the cross end shaft 42 to engage the extension 38, and this shaft is operated by means of the folding crank handle 43. A ladder, comprising the upper section 44 and the lower extension section 45, is arranged on one end of the platform, in vertical position, so that when the platform is elevated the ladder can be extended, to make it easy for a workman to climb onto the platform, and to leave it with safety.
By pulling the end sections of the platform outwardly the end supporting legs will be moved in opposite( direction from each other, and a space will be provided between the inner edges of the right platform section andthe inner edges of the left platform section. 'Ihis space isv filled by means of the leaf or board inserts 46 and 41, which have their meeting edges formedwith tongue and grooves 48, and their ends equipped with metal tongues or interlocking elements 49, which are vdesigned to fit in corresponding sockets formed in the associated parts of the platform, or in the leaf members themselves.
In sliding the platform sections outwardly the intermediate metal slides or runners bridge the other runners or slides, and thus slidably connect the right and left platform sections to each other. v
In order to support the leg members against lateral displacement, bottom cross brace bars are used. One of these, attached to the vertical sections of one of the wheeled legs by plates and rivets, as shown, is illustrated at 50 in Fig. 3, and the construction of the other wheeled leg is similar. A top cross bar 5I is also shown in said Fig. 3 and to these cross bars the bottom and top J ends of the ladder sections are riveted, also as The length of the platform may be increased or diminished over the combined lengths of the platfon sections, when in their extended positions, by means of the folding platform section 53, which is hinged on the left platform section to fold against its upper side. This hingedV platform section is equipped with folding legs 54, which are supported by the folding braces 55, and the legs 54 consist of upper leg sections 56 and the lower leg sections 5l, which are suitably bolted to each other in their adjusted relation.
By providing sliding casters on the lower leg sections, the platform may be readily shifted from one place to another, in itsassembled condition.
I claim as newz- 1. A scaffold comprising an elongate platform having an end extension, hinge means connecting the platform and its extension,- said means having a top joint, vertical legs for the ends of the platform, an outer end leg for the extension, pivot means connecting the top of the outer leg and the extension, and a detachable brace for said extension and its associated leg, so that when the brace is detached the outer leg may be swung into augment with the extension, the latter being then swingable, together with its leg, onto the top of the platform.
2. A scaffold according to claim l, wherein the legs of the main platform are foldable, the folded the platform.
3. A scaffold comprising in combination an elongated platform having at the opposite ends thereof supporting legs, rotary -ground engaging means on said legs wherebyto move the scanold; an auxiliary centrally disposed supporting leg including a top section, and a'bottom section vertical to the first section and movable thereon, said bottom section having thereon a holding foot, whereby the latter may beraised from the ground before the platform is moved.
4. A foldable scaffold including in combination an elongate foot board having vertically disposed inwardly swingable end legs, `eaxzh of said legs including a pair of laterally spaced members, means detachably holding said legs in the vertical position, and an endwlse swingable leg disposed below the center of the footboard and having relatively narrow lateral dimensions, whereby the central leg may b., swung between two of said members to fold the scaffold. j
5. A foldable scaffold comprising in combination an elongate footboard, legs supporting the ends of the footboard arid each including laterally spaced swingable members, each pair of said members having rotary elements on the lower ends thereof; pivot means connecting the top parts of the respective members with said ends; detachable braces connecting said parts and said ends; intermediate pivot means carried by the bottom face of the footboard, an intermediate vertically disposed swingable leg having its top end pivotally mounted on the second mentioned means, said intermediate leg including two vertically adjustable sections and having lateral dimensions less than the space between the associated members, and a base pad on the lower end of the intermediate leg; whereby when the braces are detached the end legs may be swung inwardly to fold the scaffold, said intermediate leg being swingable in the direction of one of the end legs and between the spaced membersh thereof.
6. A scaffold comprising in combination an elongate footboard having pivotally mounted on its opposite ends vertically disposed inwardly swingable supporting legs including top and bottom contractile sections; a ladder having top and bottom coacting portions, means attaching said portions to associated members of said sections, and means for contracting said sections, so that said legs and the ladder may be swung inwardly.
7. The combination with a scaffold having an elongate footboard andsupporting legs at its opposite ends, said legs having castors on their lower ends so as to render the scaffold movable; of a centrally disposed auxiliary supporting leg, and a ground pad on the lower end of the central leg whereby to normally secure the scaffold against movement.
8. The combination with a scaffold having an elongated footboard and supporting end legs therefor, said legs having castors on their lower ends so as to render the scaffold movable; of a centrally disposed auxiliary leg includinga top sectionna. bottom section adjustably mounted on whereby to normally, hold the scaffold against movement, and means for holding said sections in an adjusted position.
ll'REDRICK H. NORTON.