US2433216A - Scaffold unit - Google Patents

Description

Dec. 23, 1947.

A. w. HARWELL SCAFFOLD UNIT Filed March 4, 1946 5 Sheets-SheetZ A TT ORNE Y Dec. 23, 1947. A. w. HARwELL. 2,433,216

S CAFFOLD UNIT /aa /a/ /23 of a Patented Dec. 23, n1947 UNITED WMFOLD Alfred `Harwell, Birmingham, AAla..

eriicatimlMa-tcll 4, lMsgSsrel Na 2 Claims. 1

This invention relates to a scaffold unit and has for its main objects to provide such a unit that will be comparatively cheap to manufacture, highly efficient for the purpose intended, and free of complicated parts or mechanism. Also it will possess features not heretofore used in such structures.

As is will known a scaffold for use in erecting brick and other types of walls and for other kinds of elevated work, is generally made of units adapted to be erected one upon another and in long or short extensions depending on the kind of work to be done. To be entirely satisfactory for such scaffolding the unit should be simple in structure for easy assembling, safe and strong, and durable to aord long and varied use. The present invention possesses such qualities. Other advantages will appear from the drawings and description.

By referring to the drawings, part of this application, it will be observed that Fig. 1 is an elevational View of two units or sections one upon the other on line I--I of Fig. 8; Fig. 2 is an elevational view of two units or sections one upon the other on line 2-2 of Fig. 8; Fig. 3 is an enlarged end view of a section and part of another in dotted lines on line 3-3 of Fig. 4; Fig. 4 is an enlarged view of a section and part of another section in dotted lines on line 4-4 of Fig. 3; Fig. 5 is a detail view of a bottom support plate and joint; Fig. 6 is a detail view on line 6 6 of Fig. 4; Fig. 7 is a detail View on line 1-1 of Fig. 3; Fig. 8 is a top plan view of an assembled unit with ends, back and front; Fig. 9 is an elevational View of two modified end sections one upon the other the top section being in dotted lines; Fig. 10 is an elevational view of two modified back or front sections one upon the other the top section being in dotted lines; Fig. 11 is an enlarged elevational view of one and a half of an end modlfied section the half being in dotted lines; Fig. 12 is an enlarged elevational View of part 0f a front or back section and a half with the half being in dotted lines; Figs. 13, 14 and 15 are detail views of the joint plates and ends of tubes.

Referring to the drawings in detail it will be seen that there are two types of units that are set up to form a complete scaffold unit adapted to be placed one upon the other and side by side depending on the amount of scaffolding necessary for the job. Figures from 1 to 8 inclusive showone type of sections and plates for joints, and Figures 9 to 15 inclusive show another type of sections and plates for joints. The end sections are made with pieces of pipe or tube indicated by I, 2, 3, 4, 5, 6,1, I2, 2l, 22, 24, 25. The pieces are held by welding. A plate I3 with an integral web or rib is attached by welding to form the bottom supports or feet of the units. Another type of plate I4, I5 is attached by welding about half way up on the type of unit section as shown in Fig. 3. The plate I6 used at the top is the same for both types of units. The tube sections are held together to form units by angle bar pieces 8, 9, I0 and I I that are bolted to the plates on the tubes using bolt holes I8, I9 and 20. In Fig. 3 the space indicated by I1 is for the passage of a wheelbarrow if one is used on a platform plank (not shown) resting on the cross member 5. The modified type is provided with tube pieces 23 that are slidable and removable through the section rigid tubes 24 and 25 so that different levels of platforms may be used as the complete units are mounted higher and higher for use on a job requiring graduated elevation. In this type more room is provided for wheelbarrow travel assuming platform planks are placed upon the 1 cross member o1' the tube 23 in the lower position through the fixed tubes 24 or the upper position in fixed tubes 25 of the tube section.

From the foregoing it will appear that in order to assemble a unit the end sections are bolted together by the cross angle bars being attached to both sides of the ends to thus form a substantially square unit as shown by the top plan View Fig. 8.

The scaffold units may be made with any material suited for the purpose but I prefer to use pipe or tube pieces for the end sections and angle iron or steel bars for the cross pieces to form the back and front sections. The plates with web or rib integral with each may be forged or welded or may be of cast or malleable metal. Nuts and bolts are used in joints.

While I have shown and described the preferred embodiment of my invention, I do not wish to limit same to the exact and precise details of structure, but reserve the right to make all modifications and changes so long as I remain within the spirit and scope of the following claims.

Having described my invention I claim:

1. A scaffold unit of the class described comprising; one piece of metal tube as an horizontal base member, a piece of tube attached by welding to each end of the base member and positioned upward at degree angle to the base member, a cross piece of tube with each end attached by Welding to the middle portion of each upright member and positioned parallel to the base member, a piece of tube with one end attached by Welding in the corner formed by the base member and one upright member and eX- tending therefrom at approximately 45 degrees compared to the base member and having its other end attached by Welding to the middle portion of the cross member, a second member attached as and being a duplicate of the preceding member; a piece of tube attached by welding to the top end of one upright member and extending downward therefrom at approximately 45 degrees compared to the said upright member to which it is attached With its other end bent parallel with the upright member and with its Y end attached by Welding to the cross member, another piece of tube as a duplicate of the preceding member and attached in the same Way between the top of the other upright member and the cross member; the lower ends of the 4said similar members being attached to the cross mem- 5 for removably attaching said unit to another similar unit.

ALFRED W. HARWELL.

REFERENCE S CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 15 2,043,498 Uecker June 9, 1936 2,126,720 Beatty et al Aug. 16, 1938 2,194,810 Reiner Mar. 26, 1940 2,379,446 Krueger July 3, 1945

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