US2305563A - Sectional scaffold - Google Patents

Description

Dec. 15, 1942. R. A. U-ECKER ETAL SECTIONAL SCAFFOLD Filed June 16, 1939 2 Sheets-Sheet l 1942. R. A. UECKER ET AL SECTIONAL SCAFFOLD 2 Sheets-Sheet 2 Filed June 16, 1939 x a v 52. 3 4m 2% 137 4 m r m 4 J v 1 7 w e a T Patented Dec. 15, 1942 UNITED STATES PATENT OFFICE SECTIONAL SCAFFOLD Application June 16, 1939, Serial No. 279,512

2 Claims.

This invention relates to sectional scaffolds and more particularly to an end frame for use with such scaffolds.

One object of the present invention is to produce an end frame for a sectional scaffold which will be strong and rigid.

A further object of the invention is to produce an end frame for a sectional scaffold of such conformation as to make available an uninterrupted platform at intermediate elevations on the scaffold along which workers may pass.

Another object of the invention is to produce an end frame for use on a sectional scaffold which will lend itself more readily to storage.

Other objects will be apparent upon considering the following specification.

According to the present invention the end frame comprises a horizontal support, a pair of vertical posts, one of said posts connected to the support at each end thereof, a brace connected to the posts intermediate their ends and lying closely adjacent the horizontal support in the central portion of the support, and suitable shear braces connecting the other members of the end frame.

In the drawings:

Fig. 1 shows an end elevation of a sectional scaffold of two tiers with a ladder and a bracket attached thereto:

Fig. 2 is a side elevation of the scaffold shown in Fig. 1 showing the ladder and cross braces attached thereto;

Fig. 3 is a detail of the connecting member between the tiers of the scaffold; and

Fig. 4 is an elevational view of a slightly modified end frame.

Referring to the drawings, in which like numerals indicate like parts throughout the several views, the scaffold is built of a plurality of tiers of end frames, each tier comprising a pair of frames l at the same elevation and connected by cross braces llll shown in Fig. 2.

Each of the superposed frames I0 is connected to the frame l0 immediately below it by coupling pins l2--l2 (Fig. 3), each pin comprising a tubular member tapered at the ends to enable the upper frame to fit over the end of the pins readily. A collar I3 is fixed on the pins intermediate the ends and forms a stop which transmits stress from the frame l0 above to the frame l0 below it.

The end frames are made of tubular steel and eac lframe comprises a pair of Vertical posts 18-4 spaced from each other and Joined at their upper ends by a horizontal support IS. A brace I1 is attached to both posts, near the central portion thereof and passes upwardly and arches to a point adjacent the support Hi.

In order to form a rigid frame suitable shear bracing |8-l8 connects the support l6 and the brace 11 while additional shear braces 19-49 join the posts with the arched brace l1.

Bolts 20-20 are fixed on the posts |5l5 adjacent the support l6 and are adapted to receive the upper ends of the cross braces I l. The opposite ends of the cross braces II are secured over a second pair of bolts 2|2l fixed to the posts adjacent the lower end thereof.

In order to insure against the frames separating by reason of tension in the posts IS, an additional pair of bolts 22-22 is placed on the posts above the bolts 2l2l. The bolts 22receive the upper ends of cross braces 24 the lower ends of which are engageable over the bolts 20-20 in the frame next below it.

As seen in Fig. 1, the frames 10-40 may be provided with horizontal shear braces 25-45 which receive either the lower ladder support 26 or the hook for the side bracket 21.

Having thus described the invention it is hereby claimed as follows:

' 1. In a scafiold of the type adapted to be increased in height by the addition of sections thereto, an end frame comprising, a horizontal support, a vertical post integrally connected at its upper end to each end of said support at right angles thereto, a brace integrally connected to both of said posts in the intermediate portion of said posts and arching upwardly to a point adjacent the horizontal support and shear braces integrally joining said horizontal support and said brace to form a rigid end frame.

2. In a scaffold'of the type adapted to be increased in height by the addition of sections thereto, an end frame comprising, a horizontal support, a pair of vertical posts, one of said posts being fixed to said support at each end thereof, a brace connected to the central portion of said posts and arching upwardly in the central portion thereof to a point adjacent said support, a plurality of shear braces integrally connecting said brace and said support and a horizontal shear brace connecting one of said posts with the arched brace for the purpose set forth.

REINHOLD A. UECKER. INGAR G. RAMBO. DAVID E. BEA'ITY.

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