US1757912A - Detachable extension guard rail - Google Patents

Description

May 6, 1930. A.,A. LANGLOIS 1,

DETACHABLE EXTENSION GUARD RAIL Filed June 25, 1928 2 Sheets-Sheet l w/ TNESSES INVENTOR.

ARTHUR A. LANG'LO/S wi y y 6, 1930' A. A. LANGLOIS 1,757,912

DETACHABLE EXTENSION GUARD RAIL Filed June 23, 1928 2 Sheets-Sheet 2 W/T/VESSES W INVENTOR. A/fr/mfi A. AAA 620.15

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ATTORNEYS.

Patented May 6, 1930 UNITED STATES ATENT OFFICE ARTHUR A. LANGLOIS, OF KLAMATH FALLS, OREGON DETAGHABLE EXTENSION GUARD RAIL Application filed June 23,

1 is to provide a detachable guard rail of a collapsible nature which can be compactly folded to occupy a small space during shipping or storing and which can be easily assembled and quickly connected with a conventional scaffold.

A further object of the invention is to provide novel means for protecting workmen on an elevated scafiold embodying detachable sections, any number of which can be used to form a guard rail of the desired length according to the length of the scaffold with which it is associated, said sections embodying novel clamps and brace chains for connection with the scaffold.

A still further object of the invention is to provide an improved guard rail for scaf folds of the above character, which will be durable and eflicient in use, one which will be simple and easy to manufacture, and one which can be placed upon the market and associated with a conventional scaffold at a small cost.

With these and other objects in view, the invention consists in the novel construction, arrangement and formation of parts, as will be hereinafter more specifically described, claimed and illustrated in the accompanying drawings in which drawings Figure 1 is a side elevation of a conventional scaffold showing an improved guard rail associated therewith.

Figure 2 is a top plan view of a portion of a conventional scaffold showing the improved gu'ard rail incorporated therewith.

Figure 3 is a vertical transverse section taken on the line 33 of Figure 1 looking in the direction of the arrows, illustrating the construction of one of the end uprights or posts of the guard rail.

Figure 4 is a transverse section taken 1928. Serial No. 287,706.

on the line H of Figure 1 looking in the direction of the arrows, illustrating the construction of one of the intermediate uprights or posts of the guard rail.

Figure 5 is a side elevation of the improved guard rail showing certain of the sections thereof disconnected and in section.

Figure 6 is a detail perspective view of one of the end uprights or posts, and

Figure 7 is a diagrammatic view illustrating a shipping box or container for the guard rail showing the guard rail in its knocked down condition in said container.

Referring to the drawings in detail, wherein similar reference characters designate cor responding parts throughout the several views, the letter A generally indicates a scaffold and B my improved guard rail therefor.

The scaffold A can be of the usual or any conventional form and as shown includes a 7 longitudinally extending supporting body 10 which may consist of side rails 11 and transverse connecting rungs 12 on which can be laid a plank or board 18. This body 10 can be suspended in any desired way or can be" held in an elevated position by any desired type of supporting structure.

My improved guard rail B comprises end uprights or posts 15 and a plurality of intermediate uprights or posts 16. These uprights or posts 15 and 16 can be formed of tubing to provide the necessary strength and as shown the lower terminals of these uprlghts or posts 15 and 16 are flattened as at 17 terminating in U-shaped clamps 18 hav-" ing alined openings 19 for a purpose, which will be later described.

The end posts 15 also have their upper ends provided with extensions 20 which are arcuated to provide substantially circular g shaped annular collars 21, which can be of a resilient nature if desired.

The intermediate upright or post 16 terminates slightly below the upper ends of the end posts or uprights 15 and receives T pipe- E couplings 22 the arms of which can be internally threaded.

In accordance with this invention the uprights or posts 15 and 16 are adapted to support an upper guard rail member 23, which" for convenience of assembling and disassembling may include end pipe sections 24 and any desired number of intermediate pipe sections 25. Intermediate pipe sections 25 are threaded into adjacent arms of the T pipe coupling 22, while the end pipe sections 24 are threaded into the opposite end arms of the T pipe coupling 22 and are slipped through annular collars 21 of the end posts 15. If desired end caps 26 can be threaded on outer ends of the end pipe sections 2% of the upper guard rail 23 in order to present a finished appearance.

From the construction so far it can be seen that the guard rail B, as a whole, embodies a number of different sections or pieces which can be readily disconnected from one another and placed side by side in different compartments of a suitable shipping box or container as shown in Figure 7 of the drawings.

\Vhen the sections or pieces of the guard rails B are assembled as described, an efiicient guard will be provided and the clamps 18- formed on the lower ends of the posts or uprights are slipped over the outer longitudinal rail 11 of the body portion 10 of the scaffolding A after which bolts 27 are placed through the alined openings 19 of each clamp and upon the tightening of these bolts the arms of the clamps will be drawn into firm contact with the said rail 11 of the body 10 of the scaffold A.

I also prefer to brace the guard rail 13 when the same is placed on the scaffold A and I may use flexible chains 28 having the opposite ends terminating in hooks 29. These brace chains 28 can extend diagonally from the upper guard rail 23 to the opposite longitudinal rail 11 of the body portion of the scaffold to which the clamps 18 are connected with and the ends of the chains can be placed respectively around the guard rail 23 and the rail 11 of the body portion of the scaffold after which the hooks 29 can be hooked over the body portions of the chains. By this arrangement the guard rail is effectively braced and will resist strains placed thereon.

' From the foregoing description it can be seen that I have provided a novel guard rail of a demountable nature for scaffolding which can bequickly and readily placed in or removed from position on the scaffolding.

Changes in details may be made without departing from the spirit or the scope of this invention, but:

What I claim as new is:

1. The combination with a scaffold including a body portion having longitudinally eX- tending side rails and connecting members, of a guard for the scaffold including a plurality of spaced posts, means detachably connecting the lower ends of said pots to one longitudinally extending side rail of the scaffold, an upper guard rail, means detachably connecting said upper guard rail to the posts, and

bracing means for said guard including a plurality of spaced chains detachably engaging about said upper guard rail and the side rail of the scaffold opposite to the rail receiving the clamping means of said posts.

2. A guard rail for scafiolds comprising end posts and a plurality of intermediate posts, clamps formed on the lower ends of said posts, T pipe couplings carried by the upper ends of the intermediate posts, subannular collars carried by the upper ends of the end posts in alinement with said T coupling an upper guard rail including end and intermediate sections, the end sections, being received in said collars and connected with the outer arms of the T coupling and the intermediate sections being connected to the inner arms of T couplings.

3. A safety guard for scaffolds comprising end posts, a plurality of intermediate posts, U-shaped clamps carried by the lower ends of' said posts, the upper ends of the end posts being provided with annular collars, T pipe couplings carried by the upper ends of the intermediate posts, an upper guard rail including end and intermediate sections, the end sections being received in said collars and threaded in the outer arms of the T couplings, the intermediate section being threaded into the inner arms of the T couplings, and brace chains for detachable connection with said guard rail.

In testimony whereof I afiix my signature.

ARTHUR A. LANGLOIS.

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