Apparatus for Forming Temporary Guardrails on Stairs
An apparatus for use in erecting a temporary guardrail on a stair, having a stair stringer. The apparatus has an elongated stanchion. A first jaw assembly is operatively attached to the stanchion for engaging one side of the stringer, proximal the bottom edge thereof, and includes a first compression assembly to operatively urge the stanchion against the stringer. A second axially spaced, jaw assembly is operatively attached to the stanchion for engaging the one side of the stringer proximal a top edge thereof, and includes a second compression assembly to urge the stanchion against the stringer, and a bracket attached to the stanchion, and being adapted to receive a temporary guardrail member.
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The present invention relates to temporary guardrails and, more particularly, to an apparatus for erecting a temporary guardrail on a stair.
BACKGROUND OF THE INVENTIONTypically, stairs, particularly of the type in apartment buildings and the like, comprise three major components: stringers, treads and risers, although in certain stair constructions; e.g., pan stairs, there are no risers, open space is being formed between the treads. The stringers can be made of a steel channel beam, wood, etc., the dimensions of which can vary depending upon the load to be carried. As is well known, the treads are the generally horizontal portions of the stair, while the risers are the vertical portions connecting the treads.
Because of safety concerns during construction or remodeling, it is generally necessary, before a permanent handrail or guardrail is installed, to erect a temporary guardrail or handrail, and thereby minimize the chance of injuries from a construction worker falling off the stair.
SUMMARY OF THE INVENTIONOne object of the present invention is to provide an assembly for erecting a temporary guardrail on a stair.
Another object of the present invention is to provide an apparatus for erecting a temporary guardrail on a stair, which can be quickly assembled and disassembled, as needed.
In one aspect, the present invention comprises a stanchion or other elongate member, first and second, spaced jaws connected to the stanchion, which are adapted to rigidly connect the stanchion to the stringer in such a manner that the stringer is substantially perpendicular to the pitch of the stair. The apparatus of the present invention can further comprise, at least one bracket which can receive a temporary handrail; e.g., a 2×4 or the like.
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As is the case with jaw assembly 22, it can be seen that brackets 70 and 72 can be longitudinally adjusted along stanchion 12 by virtue of a plurality of registering bores, such as 80 and 82.
The above description is intended in an illustrative rather than a restrictive sense, and variations to the specific configurations described may be apparent to skilled persons in adapting the present invention to other specific applications. Such variations are intended to form part of the present invention insofar as they are within the spirit and scope of the claims below.
Claims
1. An apparatus for use in erecting a temporary guardrail on a stair having a stair stringer having a first and a second side comprising:
- an elongated stanchion having a front side and a back side;
- a first jaw assembly operatively attached to said stanchion, said first jaw assembly including a first, head portion adapted to engage a first side of said stair stringer proximal a bottom edge thereof; and a first compression assembly attached to said first head portion and operative to urge said stanchion against the front side of said stringer;
- a second, axially spaced jaw assembly, operatively attached to said stringer, said second jaw including a second head portion, adapted to engage said first side of said stringer distal said bottom edge; and a second compression assembly attached to said second head portion and operative to urge said stanchion against the front side of said stringer; and
- at least one bracket operatively attached to said stringer and axially spaced from said second jaw, said bracket being adapted to receive a temporary rail member.
2. The apparatus of claim 1, wherein said first head portion is L-shaped and includes a first flange portion for engaging said first side of said stringer, and a first leg portion attached to said first flange portion, and said first compression assembly includes a first shank portion extending from said first leg portion and a first tightener operatively connected to said first shank portion to urge said first shank portion in a direction away from said first flange portion to thereby compressively urge said first flange portion into engagement with the first side of said stringer.
3. The apparatus of claim 1, wherein said second head portion is L-shaped and includes a second flange portion for engaging said first side of said stringer, and a second leg portion attached to said first flange portion, and said second compression assembly includes a second shank portion extending from said second leg portion and a second tightener operatively connected to said second shank portion to urge said second shank portion in a direction away from said second flange portion to thereby compressively urge said second flange portion into engagement with the first side of said stringer.
4. The apparatus of claim 1, wherein said second jaw assembly is longitudinally adjustable along said stanchion.
5. The apparatus of claim 2, wherein said first shank portion spans said front and back sides of said stringer.
6. The apparatus of claim 3, wherein said second shank portion spans said front and back sides of said stanchion.
7. The apparatus of claim 5, wherein there are registering bores in said front and back sides of said stanchion and said first shank portion extends through said registering bores.
8. The apparatus of claim 6, wherein there are registering bores in said front and back sides of said stanchion and said second shank portion extends through said registering bores.
9. The apparatus of claim 8, wherein there are plurality of said registering bores.
10. The apparatus of claim 1, wherein there are at least two of said brackets axially spaced from said second jaw assembly.
11. The apparatus of claim 1, wherein there is a fastener securing said at least one rail member to said stanchion.
12. The apparatus of claim 1, wherein said at least one rail member comprises a 2×4.
13. The apparatus of any one of claims 1 and 2, wherein said tightener comprises a nut.
14. The apparatus of claim 9, wherein there is a spacer overlying said plurality of said bores on said second side of said stanchion, said spacer being disposed between said second tightener and said second side of said stanchion.
15. The apparatus of claim 1, wherein said first jaw assembly, said second jaw assembly, and said at least one bracket, are rotatable relative to said stanchion.
Type: Application
Filed: May 7, 2010
Publication Date: Nov 10, 2011
Applicant: Safety Maker, Inc. (Houston, TX)
Inventor: Miguel Osvaldo Gutierrez (Atlanta, GA)
Application Number: 12/775,817