Title:
Sectional scaffold
United States Patent 2305563


Abstract:
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...



Inventors:
Uecker, Reinhold A.
Rambo, Ingar G.
Beatty, David E.
Application Number:
US27951239A
Publication Date:
12/15/1942
Filing Date:
06/16/1939
Assignee:
SAFWAY STEEL SCAFFOLDS CO
Primary Class:
Other Classes:
52/637, 182/115, D25/66
International Classes:
E04G1/14
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Description:

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 10 at the same elevation and connected by cross braces I1- I shown in Fig. 2.

Each of the superposed frames 10 is connected to the frame 10 immediately below it by coupling pins 12-12 (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 13 is fixed on the pins intermediate the ends and forms a stop which transmits stress from the frame 10 above to the frame 10 below it.

The end frames are made of tubular steel and eact frame comprises a pair of vertical posts 15--I spaced from each other and Joined at their upper ends by a horizontal support 16. A brace 17 is attached to both posts, near the central portion thereof and passes upwardly and arches to a point adjacent the support 16.

S In order to form a rigid frame suitable shear bracing 18-18 connects the support 16 and the brace 17 while additional shear braces 19-19 join the posts with the arched brace 17.

Bolts 20-20 are fixed on the posts 15-15 1) adjacent the support 16 and are adapted to receive the upper ends of the cross braces 1. The opposite ends of the cross braces 11 are secured over a second pair of bolts 21-21 fixed to the posts adjacent the lower end thereof.

In order to insure against the frames separating by reason of tension in the posts 15, an additional pair of bolts 22-22 is placed on the posts above the bolts 21-21. The bolts 22 receive 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 10-10 may be provided with horizontal shear braces 25-25 which receive either the lower ladder support 26 or the hook for the side bracket 27.

Having thus described the invention it is hereby claimed as follows: 1. 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 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. BEATTY.