U.S. patent number 3,880,405 [Application Number 05/434,623] was granted by the patent office on 1975-04-29 for portable, personnel guard rail.
This patent grant is currently assigned to Butler Manufacturing Company. Invention is credited to Ralph H. Brueske.
United States Patent |
3,880,405 |
Brueske |
April 29, 1975 |
Portable, personnel guard rail
Abstract
A portable, reusable personnel guard rail for providing a safe
work area for workmen working at dangerous heights, particularly in
the building construction industry, comprising a plurality of
upright posts having attachment bases thereon shaped complemental
to a unit of the building or the like to which the post is to be
affixed, quick release fastening means on the bases for quick
attachment and release of the bases and posts to a building unit,
and barriers secured to and extending between the posts to provide
safe, ubobstructive protection against falls which would otherwise
result in severe or fatal bodily injury.
Inventors: |
Brueske; Ralph H. (Kansas City,
MO) |
Assignee: |
Butler Manufacturing Company
(Kansas City, MO)
|
Family
ID: |
23724971 |
Appl.
No.: |
05/434,623 |
Filed: |
January 18, 1974 |
Current U.S.
Class: |
256/59; 182/113;
248/237; 256/1 |
Current CPC
Class: |
E04G
21/3214 (20130101); E04G 21/3285 (20130101); E04G
21/3276 (20130101); E04G 21/3261 (20130101); E04G
21/3295 (20130101); E04G 5/045 (20130101) |
Current International
Class: |
E04G
21/32 (20060101); E04h 017/16 () |
Field of
Search: |
;256/59,65,24,1,66-70
;248/237 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Taylor; Dennis L.
Attorney, Agent or Firm: Shoemaker and Mattare
Claims
I claim:
1. A lightweight, reusable, portable personnel guard rail for
unobstructively enclosing a work area for workmen working at
dangerous heights, to protect the workmen against falls,
comprising: a plurality of upright posts having barrier attaching
means thereon for attachemnt thereto of elongate barriers extended
substantially horizontally between adjacent posts; and
quick-release post attaching means on the bottom ends of the posts
for releasably attaching the posts to a support structure, said
post attaching means comprising a substantially horizontal plate
fixedly secured to the lower end of the post, said plate having an
upstanding, inverted, open-ended channel-shaped portion between
opposite edges thereof and oppositely outwardly directed
substantially horizontal side portions on opposite sides of the
channel-shaped portion, said channel-shaped portion adapted to
receive an upstanding roof seam of a roof panel and said side
portions adapted to rest in flat relationship upon the upper
surface of the roof panel on opposite sides of the seam; and a
plurality of adjustable clamping means extended horizontally
through opposite sides of the channel-shaped portion and adapted to
releasably engage opposite sides of the seam to securely but
releasably clamp the post to the roof panel.
2. A personnel guard rail as in claim 1, including diagonally
extending brace means connected with the posts to brace the posts
and thus the guard rail.
3. A personnel guard rail as in claim 1, wherein said barrier means
comprises a plurality of substantially horizontally extending,
vertically spaced apart straps secured at the opposite ends thereof
to adjacent posts.
4. A personnel guard rail as in claim 3, wherein a safety belt
attaching cable is secured to the posts and extends parallel to and
behind the uppermost strap for attachment thereto of a safety belt
or harness or the like to be worn by a workman.
5. A personnel guard rail as in claim 1, wherein diagonally
extending brace means is releasably secured at one end thereof to
the post and releasably secured at the other end thereof to the
support structure, said support structure comprising a building
structure.
6. A personnel guard rail as in claim 1, wherein said support
structure comprises a roof panel of a building structure, said
plate has substantially coplanar, oppositely extending portions
resting in substantially flat engagement on said roof panel, and
said attaching means includes a plurality of separate fasteners
extended through the oppositely extending portions into the roof
panel.
7. A personnel guard rail as in claim 5, wherein said brace means
comprises a pair of nested angle members axially slidably
interengaged at adjacent ends thereof, and fastening means
connected to the adjacent ends to secure the angle members together
in different axially adjusted positions therebetween.
8. A personnel guard rail as in claim 5, wherein a brace attaching
bracket is fixed to the post, and separate quick release fastening
means is connected to the upper end of the brace means and to the
bracket to releasably secure the brace means to the post.
9. A personnel guard rail as in claim 5, wherein an angle bracket
is connected to the lower end of the brace means and to the support
structure, said angle bracket having a substantially horizontally
extending flange and a substantially vertically extending flange,
fastening means extended through the horizontally extending flange
into the support structure and fastening means extended through the
vertically extending flange into the lower end of the brace
means.
10. A personnel guard rail as in claim 5, wherein a quick release
brace attaching means is secured to the lower end of the brace and
to the building structure, said brace attaching means comprising a
substantially flat, horizontal plate, a substantially flat,
vertical plate secured at its lower edge to the upper surface of
the horizontal plate, a substantially C-shaped clamp means secured
to the underside of the horizontal plate and including a
substantially horizontal, inwardly pointing clamp arm and an
aligned, inwardly pointing adjustable clamp member for releasably
clamping an upstanding seam of a roof panel therebetween.
11. A personnel guard rail as in claim 5, wherein a quick release
brace attaching means is secured to the lower end of the brace and
to the building structure, said brace attaching means comprising a
substantially flat, horizontal plate, separate fastening means
extended through said horizontal plate into the building structure,
an upstanding, substantially rectangular brace attaching bracket
fixed to the upper surface of the horizontal plate, and separate
fastening means extended through the bracket and the lower end of
the brace.
12. A personnel guard rail as in claim 5, wherein a quick release
brace attaching means is secured to the lower end of the brace and
to the building structure, said brace attaching means comprising an
inverted, channel shaped member having a horizontal wall and
opposite, vertical depending side walls, adjustable clamp means
extended through the side walls into clamping engagement with
opposite sides of an upstanding seam of a roof panel or the like, a
first vertical, rectangularly shaped brace attaching bracket fixed
at its lower edge to the upper surface of the horizontal wall of
said channel shaped member in a plane parallel to the longitudinal
axis of the channel shaped member for attachment thereto of a brace
whose axis is in substantially the same plane as the axis of the
channel shaped member, and a second rectangularly shaped, vertical
brace attaching bracket fixed to the upper surface of the channel
shaped member in spaced relation to the first bracket and in a
plane perpendicular to the longitudinal axis of the channel shaped
member for attachment thereto of a brace whose axis is in a plane
substantially perpendicular to the axis of the channel shaped
member.
13. A personnel guard rail as in claim 5, wherein an elongate rod
is fixed to the upper end of the brace and projects at one end
thereof axially beyond the upper end of the brace, said one end of
the rod having screw threads thereon, an internally threaded
adjustment sleeve threaded at one end thereof onto the threaded end
of the rod, an elongate, L-shaped rod having one threaded end
threadably engaged in the other end of the adjustment sleeve and
another threaded end at a right angle thereto and extended through
aligned openings in the post and releasably secured therein.
14. A personnel guard rail as in claim 3, wherein each said strap
has a hook member secured thereto at one end thereof, said hook
member received in a ring member secured to a first post, a turn
buckle means secured to the other end of each strap and having a
hook means thereon, said hook means received in a ring member on
another post spaced from said first post, and means connected with
said other end of said strap to prevent turning of the strap when
the turn buckle means is adjusted.
15. A lightweight, reusable, portable personnel guard rail for
unobstructively enclosing a work area for workmen working at
dangerous heights, to protect the workmen against falls,
comprising: a plurality of upright posts having barrier attaching
means thereon for attachment thereto of elongate barriers extended
substantially horizontally between adjacent posts; and
quick-release post attaching means on the bottom ends of the posts
for releasably attaching the posts to a support structure, said
post attaching means comprising a substantially horizontal plate
fixedly secured to the lower end of the post, and a plurality of
quick-release overcenter type clamps carried by the plate on the
underside thereof, said overcenter clamps including a pivotally
mounted handle and a clamp bar operated by the handle and extending
at substantially a right angle thereto, said clamp bar movable to a
latched position engaged against the underside of a support
structure when the horizontal plate is supported on top of the
support structure, whereby the post attaching means may be attached
to an edge portion of a large structural element such as a roof
panel or portion of a floor or the like, and may be attached to an
elongate frame structural element at a desired location along the
length of the structural element.
16. A personnel guard rail as in claim 15, wherein said barrier
means comprises a plurality of substantially horizontally
extending, vertically spaced apart straps secured at the opposite
ends thereof to adjacent posts.
17. A personnel guard rail as in claim 15, wherein an adjustable
clamp member is adjustably carried by the clap bar at substantially
a right angle thereto for movement away from and into clamping
engagement with the underside of a portion of a roof purlin or the
like.
Description
BACKGROUND OF THE INVENTION
A lightweight, portable, easily repositioned, completely reusable,
personnel guard rail system which provides a safe, unobstructive
enclosure for workers engaged in special trades working above
ground level at dangerous heights, commonly encountered in the
building construction trades, such system being mounted to building
structural members or components to provide safe, uninterrupted
protection against falls, which would otherwise result in severe or
fatal bodily injury.
There are no portable, lightweight guard rail systems known in the
prior art which are effective to prevent falls and which can be
easily and quickly moved from one position to another while special
trades are working at dangerous heights.
Except for single family residences and the like, most building
construction today involves multistory construction and,
accordingly, workmen are required to work at considerable heights
above ground level, and the danger of a fall is substantial in the
absence of some means to insure that a workmen does not
accidentally step or fall from an unprotected area.
Recent governmental action has been taken to insure that the
American worker is given protection against occupational hazards,
and guide lines have been established for the employer to provide
the necessary protection. The present invention provides the
necessary elements and measure of safety necessary or desirable in
those special trades in the building construction industry or other
activity wherein such personnel guard rail systems are desirable or
required.
Moreover, the guard rail system of the present invention is
portable and lightweight and can be easily moved from one building
construction site to another and is easily and quickly mounted and
repositioned and is completely reusable.
OBJECTS OF THE INVENTION
It is an object of this invention to provide a portable and
lightweight personnel guard rail system which can be easily and
quickly mounted and repositioned, and which provides a safe,
unobstructive enclosure for workmen working at dangerous
heights.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a fragmentary, perspective view of a portion of a
building structure incorporating the personnel guard rail system of
the present invention.
FIG. 2 is a bottom perspective view of a corner post of the guard
rail system of the invention, having a quick release clamping means
thereon for attachment thereof to one type of roof purlin.
FIG. 3 is an enlarged, vertical sectional view of a portion of the
base of the post of FIG. 2 and the clamping means shown in
operative clamping relationship with a roof purlin.
FIG. 4 is an enlarged, fragmentary, perspective view of the remote
end of the diagonal brace for the post showing its manner of
connection to an adjacent roof purlin.
FIG. 5 is an enlarged, fragmentary, bottom perspective view of the
post and attachment means of FIG. 2, shown connected to a different
type of roof purlin.
FIG. 6 is an enlarged, vertical sectional view of a modified brace
connection for attachment to a ribbed roof panel having upstanding
seam means thereon.
FIG. 7 is a fragmentary, perspective view of a portion of the
seamed roof structure and brace means and attachment means of FIG.
6.
FIG. 8 is a greatly enlarged, fragmentary, perspective, exploded
view of still a further form of brace attaching means for
attachment of the remote end of the brace to a roof structure, as
seen, for example, in FIG. 11.
FIG. 9 is a fragmentary, perspective view with portions broken away
of a post and portion of a diagonal brace means, showing one type
of connection for the near end of the brace to the post.
FIG. 10 is a greatly enlarged, fragmentary, sectional view of the
attachment means for the brace and post of FIG. 9.
FIG. 11 is an enlarged, fragmentary, perspective view of a portion
of the guard rail system of the present invention.
FIG. 12 is an enlarged, fragmentary, perspective view of a post and
brace means, and of still a further form of attachment means for
attaching the post and braces to the roof structure.
DETAILED DESCRIPTION OF THE INVENTION
In the drawings, wherein like reference numerals indicate like
parts throughout the several views, a building construction is
indicated generally at 10 in FIG. 1 and comprises a plurality of
substantially vertically oriented support columns 11 supporting a
plurality of transversely extending roof beams 12 on their upper
ends and a plurality of longitudinally extending roof purlins 13
extending transversely to the roof beams 12. A plurality of
substantially flat, ribbed roof panels 14 are supported on and
fixed to the roof purlins 13 in a substantially conventional and
well-known manner, and a personnel guard rail system 15, in
accordance with the invention, is removably affixed to the roof
panels 14 and to the purlins 13 for defining a safe area for
workmen working on the roof.
The personnel guard rail system 15 comprises a plurality of spaced
apart, substantially vertically oriented posts 16, having
attachment bases 17 rigidly affixed to the lower ends thereof. A
plurality of diagonal braces 18 are connected with the posts 16 and
with the building structure to rigidify the guard rail system, and
a corner post 16' also includes a second diagonal brace 18'.
Quick release fastening means 19 is connected with the attachment
bases 17 for quick attachment and release of the bases and posts to
the building structure. A plurality of substantially horizontally
extending barriers 20, such as straps, rods, bars or the like, are
connected at their opposite ends to the posts 16 to enclose a safe
work area on the building structure.
A preferred type of quick release attaching means 19 is seen in
FIGS. 2 and 3, and the attaching means comprises an overcenter
level actuated clamp, comprising a pivotally mounted handle 21 and
a clamp bar 22 operated by the handle and extending at right angles
thereto, and an adjustment bolt 23 extending at right angles
through the clamp bar 22 for engagement with the underside of a
roof purlin 13' to clamp the attachment base or plate 17 securely
down on top of the purlin 13'. Accordingly, the attachment means 19
of this form of the invention may be quickly and easily secured to
a roof purlin 13' and removed therefrom simply by manipulating the
handle 21 either upwardly or downwardly, as seen, for example, in
FIG. 2, to either clamp or release the bolt 23 to the underside of
the purlin 13'.
In FIG. 2, a corner post 16' is shown, and the corner post has a
plurality of rings 24 permanently affixed thereto, as by weld or
the like, for attachment thereto of the barriers 20, in a manner to
be more fully described hereinafter.
A brace attachment bracket 25 is affixed to the corner post 16'
near the upper end thereof, but below the uppermost set of rings
24, and the bracket 25 has a plurality of openings 26 therethrough,
through which a bolt or pin or the like 27 may be extended to
releasably secure the uppermost end of a first portion 18a of a
diagonal brace 18. A second portion 18b of the brace extends
downwardly at its lower end to an adjacent roof purlin 13' and is
suitably secured thereto by means of an angle bracket 28 or the
like, having a horizontally extending flange 29, which is suitably
secured to the purlin 13' by means of a bolt 30 or the like
extended therethrough, and having a vertically extending flange 31
to which the lower end of portion 18b of brace 18 is pivotally
secured by means of a bolt or pin or the like 32. The adjacent ends
of portions 18a and 18b of brace 18 are adjustably interconnected
by means of a screw or bolt 33 or the like extended through a pair
of aligned holes in the adjacent ends of the brace portions, a
plurality of such holes 34 being provided for adjusting the length
of the brace 18.
In FIG. 5, a substantially similar attachment means 19 is shown
releasably clamped to a slightly different roof purlin 13. In this
form of the invention, the attachment means 19 would be actuated
only on one side of the post 16' to clamp under the horizontally
extending upper flange of the purlin 13. Alternatively, a slightly
modified attachment means could be provided, wherein the clamps 19
would be provided only on one side of the post 16' and the plate or
attachment base 17 would extend only from one side of the post
16'.
In FIGS. 6 and 7, a modified attachment means 29' for attachment of
the lower end of the brace 18 to a roof panel 14' is provided. The
modified brace attachment means 29' comprises a substantially
rectangular plate 35, having an upstanding plate or bracket 36
suitably secured substantially in the middle thereof, as by a weld
W or the like, and one flange of the angle brace 18 is pivotally
connected to the upstanding bracket or plate 36 by means of a bolt
37 extended therethrough and held therein by means of a nut or the
like 38 threaded onto the bolt. A C-clamp device 39 is suitably
affixed to the underside of plate 35, as by a weld or the like, and
includes a horizontally extending, inwardly pointed end portion 40
and a substantially aligned inwardly pointing threaded adjustment
member 41 for clamping against opposite sides of an upstanding bead
or seam 42 formed between adjacent panels 14' of the roof. Thus,
whereas the brace attachment means 29 of FIG. 4 is utilized to
attach the base to a roof purlin 13', the base attachment means 29'
of FIG. 6 and FIG. 7 is used to attach the brace to a roof panel
having an upstanding seam 42 therein.
In FIG. 8 a still further form of brace attachment means 43
comprises a substantially rectangular base plate 44, having a
substantially rectangular, upstanding plate or bracket 45 suitably
affixed thereto at approximately the midportion thereof near one
end of the plate 44 by means of a weld W or the like, and the
upstanding bracket 45 has a central opening 46 therethrough,
whereas the plate 44 has a central opening 47 therethrough adjacent
the end opposite the point of attachment of plate 45. The plate 44
may thus be placed on a flat portion of a roof panel 14 or on a
roof purlin having a flat upper flange surface, and a screw or the
like 48 may then be extended through the opening 47 into the roof
panel or purlin or the like to secure the plate 44 thereto. A bolt
37 is then extended through the lower end of the brace 18 and
through the opening 46 in the bracket or plate 45 and a nut 38
threaded thereon to secure the brace to the bracket 45, and thus to
the building structure.
In FIGS. 9 and 10, a modified attachment means for attachment of
the upper end of the brace 18 to a post 16 includes a first,
elongate, rod-like member 49 suitably secured at one end portion
thereof to an inside face of the flanges of the upper end of the
brace 18, as by means of a weld W or the like, and externally
threaded at 50 at its other end. An internally threaded adjustment
sleeve or nut 51 is threaded at one end thereof onto the threaded
end 50 of rod 49, and an L-shaped rod 52 has a threaded end 53
thereon threadably engaged in the other end of the threaded
adjustment sleeve or nut 51, and has an elongate threaded end 54
extended through aligned openings 55 in diametrically opposite
portions of the post 16 and suitably secured in adjusted position
in the openings 55 by means of lock nuts 56 engaged on the threaded
end 54 on diametrically opposite outer sides of the post 16. The
adjustment provided by adjustment sleeve 51 in this form of the
invention may be used in lieu of the screw or bolt 33 and plurality
of openings 34, as in FIG. 2, or it may be used in conjunction
therewith, and the threadably engaged L-shaped member 52 is easily
and quickly attached to and removed from the post 16 by means of
the nuts 56.
A still further form of attachment base 57 for the post 16 is seen
in FIGS. 11 and 12, and in FIG. 11 the attachment base 57 comprises
a pair of oppositely extending, substantially coplanar plates 58
and 59, having upwardly inclined, adjacent edge portions 60 and 61
integrally joined at their upper edges by means of vertically
extending portions 62 and 63 and a horizontally extending portion
64. Clamping screws or bolts 65 and 66 are adjustably threaded
through the vertically extending portions 62 and 63, respectively,
and a plurality of bolts or screws or the like 67 are extended
through the plates 58 and 59 and into the relatively flat portions
of roof panels 14, with the upstanding portion 60-64 of the
attachment base 57 disposed in straddling, overlying relationship
to the upstanding peak or corrugation 14a of the roof panel 14.
When the attachment base 57 is used with a roof panel 14 which does
not have an upstanding seam as, for example, in FIG. 11, the
clamping screws or bolts 65 and 66 are not used, and the bolts or
screws or the like 67 extended through the oppositely extending
portions 58 and 59 are relied upon to secure the post to the roof
panel.
In FIG. 12, however, the attachment base 57 of FIG. 11 is used with
a roof panel 14', having an upstanding seam 42 therein, and thus
the clamp screws or bolts 65 and 66 are threadably adjusted against
opposite sides of the upstanding seam 42 to securely clamp the
attachment base 57 to the roof panel. Additionally, screws or the
like 67' may be extended through the oppositely extending plates 58
and 59 into the flat portions of the roof panels 14' for providing
secure attachment of the attachment base 57 to the roof panel.
Also seen in FIG. 12 is a modified brace attachment means 68 for
attachment of the lower end of the brace 18 to the seam 42 of the
roof panel 14'. The brace attachment means 68 comprises an
inverted, channel shaped, elongate body 69, having an upstanding
brace attachment bracket 70 suitably affixed, as by welding or the
like, to the upper surface thereof, and in a plane substantially
parallel to the axis of the body 69. A plurality of clamping bolts
or screws 71 and 72 are threaded through the vertical depending
portions of channel shaped body 69 and into engagement with
opposite sides of the seam 42 for securely clamping the brace
attachment 68 to the roof panel 14'. A second upstanding brace
attaching bracket 73 is also suitably affixed to the upper surface
of the channel shaped body 69 adjacent the other end thereof and in
a plane substantially perpendicular to the longitudinal axis of the
body 69. This bracket 73 is used, for example, as seen at the
left-hand side of FIG. 12, for attachment of a brace 18 extending
substantially transversely of the longitudinal axis of a roof panel
42.
Referring again to FIG. 11, the method of attachment of the
barriers or safety straps 20 to the post 16 is clearly illustrated.
One end of each strap 20 has a hook member 74 thereon for
engagement in one of the rings 24 and the opposite end of each
strap member 20 has a turn buckle means 75 associated with a hook
76 for engagement in a ring 24. Thus, by adjustment of the turn
buckle means 75, the tension on the barriers or straps or the like
20 may be adjusted to obtain a satisfactory and proper degree of
tautness of the barriers 20. An elongate rod 77 may be inserted
vertically downwardly through the loop formed at the turn buckle
end of the straps or barriers 20 to prevent turning of the straps
when the turn buckle means 75 is adjusted.
A safety harness or belt attaching cable 78 may be provided behind
the uppermost strap or barrier 20 completely around or along the
length of the personnel guard rail for attachment thereto of a
safety line or rope 79 by means of a snap link or hook 80 for
attachment thereto of a safety belt or harness or the like 81 to be
worn by a workman.
The posts are preferably tubular, as illustrated, and the braces
are preferably angle shaped in transverse cross section, and the
posts and braces of the invention may comprise any suitable, strong
but lightweight material, such as metal, plastics, and the like.
Further, a brace 18 is preferably provided at each post extending
transversely to the plane of the guard rail, but a brace extending
parallel to the plane of the guard rail need be provided only about
every 100 feet. Of course, different arrangements and numbers of
braces may be provided.
Thus, the present invention provides a portable, lightweight,
personnel guard rail system, which can be easily positioned for use
and moved from one location or building structure or the like to
another, and wherein various means and modifications are provided
to enable use of the personnel guard rail system with various types
of building structures and components.
As this invention may be embodied in several forms without
departing from the spirit or essential characteristics thereof, the
present embodiment is, therefore, illustrative and not restrictive,
since the scope of the invention is defined by the appended claims
rather than by the description preceding them, and all changes that
fall within the metes and bounds of the claims or that form their
functional as well as conjointly cooperative equivalents are,
therefore, intended to be embraced by those claims.
* * * * *