US3791486A - Scaffolding - Google Patents

Abstract

The invention relates to a scaffold arrangement having stepped elements, the horizontal portions of which constitute supports for a work platform and a materials platform, the vertical portions of the stepped elements being pipes slidable over and releasably securable to one of a pair of vertical poles, the rears of the materials platform supports having sleeves slidable on the other of the pair of vertical poles, the vertical poles being included in a framework.

Description

United States Patent 1 1 i v 1 1 3,791,486

Marnoch Feb. 12, 1974 SCAFFOLDING 3,612,219 10/1971 2 Former 182/146 [76] Inventor: Robert Haldane Marnoch, PO. Box 313 21? If Mobem, Nata], Westvllle, 3,438,460 3/1969 $01811 182/132 South Africa [22] Filed: Apr. 24, 1972 Primary Examiner-Reinaldo P. Machado pp No 246 816 Attorney, Agent, or FirmYoung & Thompson [30] Foreign Application Priority Data [57] ABSTRACT Apt 28, 1971 South Af i H 71/2740 The invention relates to ascaffold arrangement having I stepped elements, the horizontal portions of which [52 U.S. c1. 182/132, 182/179 constitute Supports for a Work Platform and materi- [51 Int. Cl. E04g l/18 2118 Platform, h vertical portions of the pp [58] Field of Search 182/132, 145, 146, 178; mm being Plpes slidable Over and releasably Secuv 248/235, 243 244 able to one of a pair of vertical poles, the rears of the materials platform supports having sleeves slidable on [56] Refellences Cited the other of the pair of vertical poles, the vertical UNITED STATES PATENTS poles being included in a framework.

2,790,684 3/1957 Sprinkel 182/132 2 Claims, 4 Drawing Figures PMENTED F551 2 l 3, 781 ,486

SCAFFOLDING BACKGROUND OF THE INVENTION Scaffolding arrangements are known which provide a platform for the workers and a platform for the materials, the latter platform being located between about two and four feet from the level of the work platform. The prior art arrangements have been very complicated and expensive and it is an object of the present invention to provide a simple and inexpensive arrangement.

SUMMARY OF THE INVENTION The invention provides a simple and inexpensive scaffolding arrangement of the type comprising work and materials platforms, supports for the platform being provided by stepped elements, the horizontal portions of which constitute the platform supports and the vertical portion being in the form of a pipe slidable over and releasably securable to one of a pair of vertical poles, the rear of the upper support having a sleeve slidable on the other of the vertical poles, the vertical poles being included in a framework.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a scaffold assembly mounted on a support frame;

FIG. 2 is a detailed view of a support bracket forming part of the scaffold. FIG. 3 is a cross brace for the support frame; and

FIG. 4 is a sectioned view on Arrow A in FIG. 2. The scaffold comprises a pair of elements in the 1 form of support brackets 12, one bracket 12 located at each end of the scaffold. Hence only one bracket 12 is visible, the second being hidden from view behind the first. The brackets are however, substantially identical.

The support bracket 12 comprises a long pipe 14 which in use is vertically disposed. Projecting horizontally from the lower end of this pipe 14 is a length of rolled steel angle ,16, reinforced by a gusset l8 and provided at its outer end with an upwardly projecting lug 20. This angle 16 in use supports boards 22 constituting a first platform on which the workman can stand while he is working, the lug preventing the boards from sliding forwardly off the angle 16. A length of rolled steel flat 24 is welded in a horizontal disposition to the upper end of the pipe 14, projecting in a direction opposite to the angle 16. This flat 24 is braced by a brace 26 and carries at its outer end a short length of pipe 28, also vertically disposed. Boards 29 are mounted between the flats 24 and constitute a second platform on which the workman can place his tools and materials.

The two pipes 14 and 28 are mounted over a pair of spaced vertical pipes 30 and 32 joined together at top and bottom by cross members 34 and 36, and braced by an angularly disposed brace 38. The members 30 to 38 constitute a support frame 39 for the brackets 12. Two of such support frames 39 are mounted adjacent a wall or the like to be built, spaced one from the other and joined together by a cross brace 42 which is mounted by means of so called shouldered flip locks 43 on the pipes 30. The pipe 28 is longitudinally split as at 28a to clear these flip locks.

The brackets 12 are slidable along the pipes and 32 of the support frame 39 and thus the vertical position of the scaffold on the support frame can be quickly adjusted. The scaffold may be lifted by the workman himself, if he is provided with a manually operated hoist (not shown). The hoist is mounted inany convenient manner on the support frame 39 and engages with lifting lug 48. The position of the scaffold is fixed by means of a pin 45 (retained on the bracket 12 by a chain 45a) which passes through holes 44 in the pipe 14 in register with holes 46 on the pipe 32. The pitch of the holes 44 may be made slightly larger than that of the holes 46, allowing for a vernier adjustment of the position of the brackets 12.

To allow for the fact that it may be difficult to mount the support frame truly level, the cross brace 42 may be mountable in any of a series of holes in the pipes 32 so that if the pipe 32 at the one end of the frame is raised relative to the pipe 32 at the outer end'of the frame, the brace may be detached andremounted in any holes with which it may be in register.

It will be seen that the lower cross member 36 of the support frame 39 projects forwardly of the line of the front pipe 32 a distance approximately equal to the length of the tubular steel angle 16 of the support bracket 14. The cross member 36 is provided at its ends with fittings to enable it-to engage with the upper end of an elevating support frame 40. It is of advantage to provide an elevating support frame which is as wide as the combined width of the two platforms 22 and 29, since this results in considerably greater stability of the scaffold than would otherwise be the case.

We claim: v

l. A scaffold comprising a framework of vertical rods, and a bracket sliding vertically on said rods, said bracket comprising a first relatively long vertical pipe, a first horizontal support for a work platform fixedly secured at one end to one side of the lower end of said first pipe, a second horizontal support for a material platform fixedly secured at one end to the upper end of said first pipe on the side of said first pipe opposite said first support, a second relatively short vertical pipe fixedly secured to the other end of said second support, and a diagonal brace interconnecting the lower end of said first pipe and the bracket adjacent the junction of said second pipe and second support.

2. A scaffold as claimed in claim 1, and boards on said first and second horizontal supports.

Claims (2)

1. A scaffold comprising a framework of vertical rods, and a bracket sliding vertically on said rods, said bracket comprising a first relatively long vertical pipe, a first horizontal support for a work platform fixedly secured at one end to one side of the lower end of said first pipe, a second horizontal support for a material platform fixedly secured at one end to the upper end of said first pipe on the side of said first pipe opposite said first support, a second relatively short vertical pipe fixedly secured to the other end of said second support, and a diagonal brace interconnecting the lower end of said first pipe and the bracket adjacent the junction of said second pipe and second support.

2. A scaffold as claimed in claim 1, and boards on said first and second horizontal supports.

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