US 2872251 A
Description (OCR text may contain errors)
Feb. 3, 1959 e. R. CROSBY SCAFFOLD END FRAME AND ADAPTER Filed June 17. 1954 INVENTOR. 251 02 12 6Z4) SCAFFOLD END FRAME AND ADAPTER Glenn R. Crosby, Kansas City, Mo.
Application June 17, 1954, Serial No. 437,376 2 Claims. e1. 304-2 The present invention relates to scaffolds and more particularly to scaffolds provided with an extension bracket which is adaptable to cooperate with a base scaffold section to provide access to elevated work areas.
An object of the present invention is to provide a sectionalized building scaffold mountable in sections or tiers United State P one above the other and provided with a bracket portion H which may be elevated in selected increments vertically to higher working areas.
Another object of this invention is to provide a scaffold suitable for vertical mounting in sections one above the other, each scaffold section being provided with intermediate platforms.
A further object of the invention is to provide a eom V bination' of a multiple-level scaffold in which suitable bracket platform may be interlocked with a base scaffold section so that a worker may be elevated to a higher desired working elevation without leaving the scaffold to erect the conventional loose supporting plank structure.
Additional objects of this invention are to provide a light, sturdy locking scaffold device which has an intermediate working level platform .convertible to a higher level platform by insertion of a suitable adapter bracket in the intermediate working level to elevate the workman, to insure greater safety at elevated positions, to afford greater accessibility to working materials, and to reduce lost motion in transferring working materials to the working platform.
Other objects and a better understanding of the invention may be had by reference to the following detailed description taken in connection with the accompanying drawings, in which:
Figure 1 is a perspective view of the assembled scaffold aligned with the brick wall being constructed with portion thereof broken away and with some of the planks removed;
Fig. 2 is a fragmentary and elevational view of two sections, one assembled upon the other, and lying beside the wall being constructed;
Fig. 3 is a transverse sectional view taken on line 3-3 of Fig. 1 and through the vertical edge of the adapter;
Fig. 4 is a vertical side elevational view of a modified form of the invention.
Referring now particularly to Figs. 1, 2 and 3, 10 represents an end frame section of the split-level type, which are connected together by crossed brace rods 11 joined to one another intermediate their lengths by a bolt 12. The end frame section has a forward upright pipe 13 with a bottom dowel 14 therein and a rear upright pipe 15 with a bottom dowel 16 therein. The upper ends of the pipes 13 and 15 are open to receive the dowels of a superimposed section which is added as the wall, as indicated at 17, is brought to the higher elevations. The front pipe 13 is shorter than the rear pipe 15 and its upper end is 1 2, 72,251 I Patented Feb. 3, 9
joined to an intermediate vertical pipe 18 by a short transverse pipe 19 adapted to receive planks 20 to support the workmen at a low level. The upper ends of the vertical pipes 18 and 15 are joined by a horizontal pipe 20' for supporting planks 21 at a higher level and on which bricks 22 and mortar 23 are supported for use by the workmen at an easily accessible elevation where the workmen will have these materials ready at hand. Each end section is further braced by parallel horizontal pipes 24 and 25 vertically spaced from one another and secured, as by welding, to and extended between vertical pipes 13, 18 and 15. All of the pipes are preferably joined to one another by welding to provide a rigid, durable and strong end section.
The cross braces 11 are joined to the vertical pipes 15 and 18 by bolts 26 to provide a complete scaffold unit. A similar assembly can be made and superimposed upon the one unit.
When it is desired to elevate the planks 20, as when the wall has been advanced to a higher level, an adapter 27 is secured to the short pipe 13 and over the horizontal plank support member 19, on each of the sections. This adapter 27 has a vertical pipe 23 with a dowel pin 29 in its lower end adapted to fit into the upper end of the short pipe 13. In order to give adequate support of the adapter 27 when so mounted, a half-sleeve structure 30 is made with a horizontal portion adapted to lie over the horizontal pipe 19, and a vertical portion 31 adapted to lie against the vertical member 18. A horizontal member, or pipe, 32 connects the upper end of the short pipe 28 with the upper end of the vertical half-sleeve portion 31. All of these members are welded into a rigid construction. To further provide adequate support, a half-sleeve 33 is welded to the outer face of the short vertical pipe 28 and extends downwardly parallel to the pin 29 to engage with the forward face of the upper end of the short pipe 13, in a manner as shown in Fig. 1. This provides adequate support for the adapter upon the section so that the horizontal pipe 32 of the adapter will provide an extension for the horizontal pipe 20 of the end section so that planks 20 and 21 can extend throughout the full width of the unit and will allow the workmen to work on the wall at the higher elevations.
In order to further hold the adapter 27 in place upon the end section, the bolt 26 connecting the brace 11 to the intermediate vertical pipe 18 can be extended through the vertical half-sleeve portion 31, in the manner shown in Fig. l at the righthand end thereof.
When the wall has been built up from the upper level platform formed of the planks 2i) and 21 where it is not convenient for the workman to work upon the wall, another unit is disposed thereupon in the manner as shown 11] Fig. 2, and the workmen again operate from the lower level platform of that unit. The adapters 27 are allowed to remain on the first unit, and the'dowel 14 of the upper unit will enter the upper end of the short pipe 28 of the adapter, as clearly shown in Fig. 2.
In Fig. 4, there is shown a modified form of the end frame section to be used to build up a scaffold structure on the base unit, shown in Fig. 1. With such modified form only one set of adapters would be needed for any number of assembled scaffold units. With this form of the invention, a front pipe 35 is designed to extend to a greater distance below the horizontal pipe 36 in order to take up the distanceof the adapter, upon the adapter being removed from the lower section. This extension is indicated at 35 and it has a dowel 37 adapted to engage with the upper end of the front pipe 35 when one unit is assembled upon the other unit.
A rear pipe 38 is connected to the rear end of the horizontal member 36 and to an upper horizontal member 39,
A short horizontal pipe 40 is joined to the upper end of the pipe 35 and to the inner end thereof there is secured a short vertical pipe 41 that is joined to the forward end of the upper horizontal pipev39. Space is-provided between the pipes 40 and 41 for receiving the adapter 27 which will be united upon the end frame section in the same manner as above described, but this adapter will be removed prior to placing another unit of the scaffold assembly thereabove, as illustrated with dot and dash lines.
that may be designated as It? is effected by an inclined pipe 43 that extends between thelower end of the vertical member 38 and the ioined ends of the short pipes 40 and 41. A further inclined brace pipe 44 extends in an opposite direction from a point intermediate the length of the ,brace pipe 43 and the upper end of the rear pipe 38. All
pipes are united by welding to provide a rigid, durable and Welded construction. These end frames will be used in the same manner with the brace rods 11 and with the adapter 27.
It will now be apparent that any intermediate level may be employed as well as the units or sections made of different heights and size depending upon the nature of the work to be performed with these scaffold assemblies. It will also be apparent that the units can be disassembled and easily stored or placed upon a truck and transported.
It will be seen that upon completion of work to the highest ;level from one unit, another unit can be added and the workmen can work from a split level until they have need to be further elevated. The scaffold units can be added one at a time and used first at the split or lower level and then at the higher level with the use of the adapter.
While various changes may be made in the detail construction, it shall be understood that such changes shall be within the spirit and scope of the present invention as defined by the appended claims.
What is claimed is:
1. A split'level scaffold having horizontal platforms at vertically spaced levels comprising an end section including a pair of spaced legs, a pin extending outwardly from one end of each of said end legs for engagement with an opening in the opposite end of a leg of a similar end section, a plurality of spaced lateral members for connecting the legs of said end sectionsand a plurality of cross brace members adapted to maintain said end sections in spaced relation, and an adapter including a leg adapted to extend from said third spaced leg of said end section to the upper platform level.
2. A split level scaffold having horizontal platforms at vertically spaced levels and a unit adapted to be superimposed on said base unit as defined in claim 1 wherein a lateral member is provided connecting the tops of said platform legs, a lateral member connecting a lower platform leg with the bottom an outer upper platform leg, a lateral member connecting the top of said lower platformleg with the bottom of said second upper platform leg, 2. first inclined member connecting the bottom of the second upper platform leg with the bottom of the first upper platform leg and a second inclined member connecting the top of said first upper platform leg with said first inclined member.
References Cited in the file of this patent UNITED STATES PATENTS D. 122,611 Uecker et al Sept. 17,1940 D. 128,057 Roney et al July 1, 1941 D. 142,496 Reiner Oct. 2, 1945 2,295,311 Uecker et al Sept. 8, 1942 2,316,560 Causey Apr. 13, 1943 2,383,449 Clark Aug. 28, 1945 2,433,216 Harwell Dec. 23, 1947 2,462,429 Sachs Feb. 22, 1949 2,468,186 Du Perret Apr. 26, 1949 2,481,885 Simpson Sept. 13, 1949 2,561,938 Meng et al. July 24, 1951 2,575,461 North -Nov. 20, 1951 2,631,900 Simpson Mar. 17, 1953