U.S. patent application number 12/584246 was filed with the patent office on 2011-03-03 for tilt-up wall brace dolly and method of use.
Invention is credited to Larry O. Finch.
Application Number | 20110047895 12/584246 |
Document ID | / |
Family ID | 43622765 |
Filed Date | 2011-03-03 |
United States Patent
Application |
20110047895 |
Kind Code |
A1 |
Finch; Larry O. |
March 3, 2011 |
Tilt-up wall brace dolly and method of use
Abstract
The invention includes various embodiments of a tilt-up wall
brace dolly and method of use. Tilt-up wall braces incorporating
the tilt-up wall brace dolly features are also disclosed. The
embodiments of the invention are useful in the construction
industry, particularly the erection and temporary bracing of
tilt-up walls.
Inventors: |
Finch; Larry O.; (Orem,
UT) |
Family ID: |
43622765 |
Appl. No.: |
12/584246 |
Filed: |
September 2, 2009 |
Current U.S.
Class: |
52/126.1 ;
414/11; 52/127.2; 52/745.21 |
Current CPC
Class: |
E04G 21/26 20130101;
E04G 21/168 20130101 |
Class at
Publication: |
52/126.1 ;
52/745.21; 52/127.2; 414/11 |
International
Class: |
E04G 21/16 20060101
E04G021/16; E04B 1/38 20060101 E04B001/38; E04G 21/26 20060101
E04G021/26 |
Claims
1. A tilt-up wall brace dolly for use with a tilt-up wall brace,
the dolly comprising: a body configured to receive a foot bracket
attached to a lower end of a tilt-up wall brace; and a low friction
mechanism disposed about a bottom end of the body, the low friction
mechanism allowing independent two-axis movement of a bottom end of
the brace over a foot bracket mounting surface.
2. The dolly of claim 1, wherein the body is configured to surround
a lower leg and the foot bracket.
3. The dolly of claim 2, wherein the body comprises a cylindrical
member with an opening at an upper end for receiving the lower leg
and the foot bracket.
4. The dolly of claim 3, wherein the cylindrical member further
comprises an upper reinforcement disposed around the upper end and
a lower reinforcement disposed around a lower end of the
cylindrical member.
5. The dolly of claim 1, wherein the body comprises a planar panel
having a shoe on one surface for receiving the foot bracket.
6. The dolly of claim 5, wherein the low friction mechanism
comprises a plurality of casters mounted on an opposite surface of
the planar panel.
7. The dolly of claim 1, further comprising an attachment mechanism
configured for releasably securing the body to the foot
bracket.
8. The dolly of claim 7, wherein the attachment mechanism comprises
a hand-turned screw passing through a threaded opening in the body
and configured to provide a friction fit against a lower leg of the
tilt-up wall brace, the friction fit sufficient to secure the dolly
on the lower leg.
9. The dolly of claim 7, wherein the attachment mechanism comprises
a cam mechanism activated by a lever, the cam configured for
selectively providing a friction fit against a lower leg of the
tilt-up wall brace, the friction fit sufficient to secure the dolly
on the lower leg.
10. The dolly of claim 7, wherein the attachment mechanism
comprises an elastic band configured for wrapping around the foot
bracket and being secured to the planar panel.
11. The dolly of claim 1, wherein the low friction mechanism
comprises at least one caster.
12. The dolly of claim 11, wherein the caster comprises a wheel
with a rounded tire profile.
13. The dolly of claim 1, wherein the dolly further comprises a
handle attached to the body.
14. A method for securing a foot bracket of a tilt-up wall brace to
a floor slab, the method comprising: providing a tilt-up wall brace
dolly for use with a tilt-up wall brace foot bracket, the dolly
comprising: a body configured to receive the foot bracket; an
attachment mechanism configured for releasably securing the body to
the foot bracket; and a low friction mechanism disposed about a
bottom end of the body, the low friction mechanism allowing
independent two-axis movement of a bottom end of the brace over a
foot bracket mounting surface; attaching the dolly to the foot
bracket; placing the low friction mechanism onto the floor slab;
guiding the dolly along the floor slab to a desired mounting
location; removing the dolly from the foot bracket; and securing
the foot bracket to the floor slab at the desired mounting
location.
15. The method of claim 14, wherein providing the tilt-up wall
brace dolly further comprises providing a cylindrical body with an
opening at one end for receiving the foot bracket and lower leg of
a tilt-up wall brace, the attachment mechanism comprising a screw
rotationally disposed within a threaded hole in the cylindrical
body, the screw configured to selectively apply pressure against
the lower leg and the low friction mechanism comprising a caster
mounted to an opposite end of the cylindrical body.
16. A tilt-up wall brace, comprising: an elongated beam; a wall
bracket attached to an upper end of the elongated beam, the wall
bracket configured for mounting to a tilt-up wall; a foot bracket
attached to a lower end of the elongated beam, the foot bracket
configured for mounting to a foot bracket mounting surface; and a
tilt-up wall brace dolly configured for selective attachment to the
foot bracket, the dolly further comprising: a body configured for
selectively receiving, holding and releasing the foot bracket; and
a low friction mechanism disposed about a bottom end of the body,
the low friction mechanism allowing independent two-axis movement
of a bottom end of the brace over the foot bracket mounting
surface.
17. The tilt-up wall brace of claim 16, wherein the dolly further
comprises an attachment mechanism configured for selectively
securing the body to the foot bracket.
18. The tilt-up wall brace of claim 16, wherein the dolly further
comprises a handle attached to the body.
19. The tilt-up wall brace of claim 16, wherein the low friction
mechanism comprises a wheel with a rounded tire profile.
20. The tilt-up wall brace of claim 16, wherein the body further
comprises upper and lower reinforcements at opposite ends, wherein
the upper and lower reinforcements each comprise portions of pipe
with an inner radius about equal to an outer radius of the body.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] This invention relates generally to construction equipment.
More particularly, the invention relates to braces used to erect
tilt-up concrete panels.
[0003] 2. Description of Related Art
[0004] Tilt-up construction is a job-site form of precast concrete
construction. It involves prefabricating concrete wall panels or
slabs on a suitable flat surface, e.g., the building floor slab or
a temporary casting slab, then lifting or "tilting" such walls up
with a mobile crane with cables and carrying them to their final
locations, where they are installed as vertical walls and become
integral parts of the completed structure. Because the concrete
walls are poured and cured horizontally on flat surfaces and
subsequently lifted or "tilted" up into a vertical orientation and
installed on or adjacent to a footing or floor slab to form a wall
in a structure, they are variously referred to in the industry as
"tilt-up walls", "tilt-up panels" or "tilt-up wall panels".
[0005] Once a tilt-up wall has been poured and cured, the tilt-up
wall brace may be secured to the tilt-up wall. Then the tilt-up
wall and tilt-up wall braces are temporarily connected to hoisting
equipment, such as a mobile crane with accessory lifting apparatus
that may be attached to the wall, permanently or temporarily,
during the erection phase of installation. The crane operator
maneuvers the hoisted wall into the correct location, in a plumb or
vertically aligned position. At this point, the raised wall is
temporarily braced using the tilt-up wall braces that may, or may
not, already be attached to the raised wall by securing an opposite
end to a support surface such as a floor slab. Such tilt-up wall
braces are well known in the art, e.g., see U.S. Pat. Nos.
4,083,156 to Tye, 3,798,856 to Gloskowski and 2,684,824 to
Hillberg. Note that the tilt-up wall braces generally remain in
place until a roof structure is installed over the tilt-up walls,
thus providing sufficient stability to the building structure such
that the braces can be safely removed without the tilt-up walls
tumbling down.
[0006] Tilt-up wall braces are generally heavy steel poles with a
"wall bracket" at an upper end that is configured to pivotally
attach to the tilt-up wall and a "foot bracket" on the lower end
which is similarly configured to pivotally attach to the floor slab
or other horizontal ground surface. A conventional tilt-up brace
may further include a means, such as a screw or ratchet mechanism
along the brace axis, for incrementally adjusting the length of the
tilt-up wall brace in order to push or pull the wall into precise
position after the foot bracket has been secured. As the tilt-up
wall is being hoisted to its final location, a construction worker
generally must guide the unattached foot bracket on the tilt-up
wall brace until the wall is in roughly the correct position. Once
the tilt-up wall is in roughly the correct position, the foot
bracket may be secured to the floor slab and its length
incrementally adjusted to fine-tune the vertical alignment of the
tilt-up wall.
[0007] FIGS. 1A and 1B are front and side views illustrating how a
construction worker 200 positions a conventional tilt-up brace 210
with its associated lower leg 256 and foot bracket 220, by leaning
into the brace 210 with his shoulder and holding the brace 210 and
foot bracket 220 above the floor slab 230 as a tilt-up wall (not
shown) is being erected. The foot bracket 220 is configured to be
secured to the floor slab 230 once the poured and cured tilt-up
wall (not shown) attached to the opposite end of brace 210 is
maneuvered into position by a crane 240 (FIG. 1B). Note that the
construction worker 200 may have to hold up the brace 210 while
stepping up from the ground 250 upon which the floor slab 230 has
been poured. The interface between the ground 250 and the floor
slab 230 may include exposed rebar 260 and other obstacles (e.g.,
footing trench, footings, etc.) for the construction worker 200 to
traverse. FIG. 1A also illustrates a tilt-up wall 270 that has
already been erected.
[0008] However, there are problems with conventional braces 210 and
this conventional method of positioning the foot bracket 220. For
example, the foot bracket 220 should not be dragged along the
surface of floor slab 230, because doing so may cause gouges in the
surface. Gouges in the surface of the floor slab 230 may require
refinishing, thus, adding cost to the construction. Consequently, a
construction worker 200 must hold the lower end of the brace 210
off of the floor slab 230, generating a labor cost. Additionally,
the brace 210 may be quite heavy and the construction worker 200
may become fatigued while holding up and moving the lower end of
the brace 210 for several minutes as the tilt-up wall (not shown)
is being erected. Finally, the brace 210 may become dangerous for
the construction worker 200, who may be standing in a footing
trench (not shown) or on the slab floor 230, and can potentially
become pinned between such a construction surface with exposed
rebar 260 (FIG. 1B) or other obstacles (not shown) and the brace
210 as the tilt-up wall (not shown) is being maneuvered by a crane
240 (shown partially in FIG. 1B).
[0009] In view of these problems associated with conventional
tilt-up wall braces and their methods of use, it would be highly
advantageous to provide an apparatus and method that makes it
easier to position the lower end of a tilt-up wall brace, reduces
construction worker fatigue, and potentially avoids some of the
danger associated with positioning the lower end of a tilt-up
brace. Such an apparatus and method would likely increase worker
safety. It would also be advantageous if such a novel apparatus and
method could be used with conventional tilt-up braces or be
integrated with novel tilt-up braces.
SUMMARY OF THE INVENTION
[0010] An embodiment of a tilt-up wall brace dolly for use with a
tilt-up wall brace is disclosed. The embodiment of a dolly may
include a body configured to receive a foot bracket attached to a
lower end of a tilt-up wall brace. The embodiment of a dolly may
further include a low friction mechanism disposed about a bottom
end of the body, the low friction mechanism allowing independent
two-axis movement of a bottom end of the brace over a foot bracket
mounting surface.
[0011] An embodiment of a tilt-up wall brace is disclosed. The
embodiment of a tilt-up wall brace may include an elongated beam.
The embodiment of a tilt-up wall brace may further include a wall
bracket attached to an upper end of the elongated beam, the wall
bracket configured for mounting to a tilt-up wall. The embodiment
of a tilt-up wall brace may further include a foot bracket attached
to a lower end of the elongated beam, the foot bracket configured
for mounting to a foot bracket mounting surface. The embodiment of
a tilt-up wall brace may further include a tilt-up wall brace dolly
configured for selective attachment to the foot bracket. The dolly
in the embodiment of a tilt-up wall brace may further include a
body configured for selectively receiving, holding and releasing
the foot bracket. The embodiment of a dolly may further include a
low friction mechanism disposed about a bottom end of the body, the
low friction mechanism allowing independent two-axis movement of a
bottom end of the brace over the foot bracket mounting surface.
[0012] An embodiment of a method for securing a foot bracket of a
tilt-up wall brace to a floor slab is disclosed. The embodiment of
a method may include providing a tilt-up wall brace dolly for use
with a tilt-up wall brace foot bracket. The dolly may be configured
as described elsewhere herein with a low friction mechanism. The
embodiment of a method may further include attaching the dolly to
the foot bracket. The embodiment of a method may further include
placing the low friction mechanism onto the floor slab. The
embodiment of a method may further include guiding the dolly along
the floor slab to a desired mounting location. The embodiment of a
method may further include removing the dolly from the foot
bracket. The embodiment of a method may further include securing
the foot bracket to the floor slab at the desired mounting
location.
[0013] Additional features and advantages of the invention will be
set forth in the description which follows, and in part will be
apparent from the description, or may be learned by the practice of
the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The following drawings illustrate exemplary embodiments for
carrying out the invention. Like reference numerals refer to like
parts in different views or embodiments of the present invention in
the drawings.
[0015] FIGS. 1A and 1B are front and side views illustrating how a
construction worker positions a conventional tilt-up brace with its
associated foot bracket by leaning into the brace with his shoulder
and holding it as a tilt-up wall is being erected.
[0016] FIG. 2 is a side-view of an embodiment of a tilt-up wall
brace dolly attached to a tilt-up wall brace during erection of a
tilt-up wall, according to the present invention.
[0017] FIG. 3 is perspective view of another embodiment of a dolly
with a cylindrical body, according to the present invention.
[0018] FIGS. 4A and 4B are perspective views of embodiments of
tilt-up wall brace dollies being used during the erection of a
tilt-up wall, according to the present invention.
[0019] FIG. 5 is a side view of an alternative embodiment of a
dolly for use with a tilt-up wall brace, according to the present
invention.
[0020] FIG. 6 is a flow chart of an embodiment of a method for
securing a foot bracket of a tilt-up wall brace to a floor slab,
according to the present invention.
[0021] FIG. 7 is a drawing of another embodiment of a tilt-up wall
brace dolly, according to the present invention.
DETAILED DESCRIPTION
[0022] The invention is a tilt-up wall brace dolly and method of
use. The embodiments of the invention are useful in the
construction industry, particularly the erection and temporary
bracing of tilt-up walls. Embodiments of a tilt-up wall brace dolly
according to the present invention may be configured for use, or
attached to, conventional tilt-up wall braces, or may be integrated
into novel tilt-up wall braces. The embodiments of a tilt-up wall
brace dolly illustrated and described herein are particularly
useful for positioning the lower end of a tilt-up wall brace along
a floor slab surface (inside of a building) or along a flat surface
outside of a building during erection of a tilt-up wall. The
embodiments of the invention disclosed herein may reduce
construction worker fatigue. The embodiments of the invention may
also reduce possible injury to construction workers during
positioning of tilt-up wall braces.
[0023] FIG. 2 is a side-view of an embodiment of a tilt-up wall
brace dolly 100 attached to a tilt-up wall brace 110 during
erection of a tilt-up wall 170. The tilt-up wall 170 may be secured
to a footing 180 adjacent to the floor slab 130. The tilt-up wall
brace may include a wall bracket 120 configured to mounting to an
upper end, shown generally at arrow 195, of tilt-up wall 170. The
embodiment of a dolly 100 may include a body 102 configured to
receive a foot bracket 140 attached to a lower end, shown generally
at arrow 105, of the tilt-up wall brace 110. According to one
embodiment, body 102 may be a hollow structural member with an
opening at one end 104 for receiving the foot bracket 140.
According to various embodiments, the hollow structural member may
be cylindrical, or any other suitable shape, such that the foot
bracket 140 may be received therein.
[0024] An embodiment of a dolly 100 may optionally further include
an attachment mechanism 106 configured for releasably securing the
body 102 to the foot bracket 140. One advantage of including an
attachment mechanism 106 with dolly 100 is that the attachment
mechanism 106 holds the dolly 100 in place on lower end 105 of a
tilt-up wall brace 110 even when the tilt-up wall brace 110 is
lifted off of the floor slab 130 for positioning during movement of
the tilt-up wall. According to the illustrated embodiment, the
attachment mechanism 106 may include a knobbed bolt 108 threadably
engaged to body 102 and configured to interfere with a foot bracket
140 and thereby releasably hold the dolly 100 onto the foot bracket
140 through friction between the knobbed bolt 108 and the foot
bracket 140. It will be understood that many other embodiments of
attachment mechanisms 106 are possible and considered within the
scope of the present invention as an equivalent to the threadably
engaged, knobbed bolt 108. For example and not by way of
limitation, clamps, cam mechanisms, latches and any other suitable
mechanical means for releasably securing the dolly 100 to the lower
end 105 of brace 110 or to a foot bracket 140 of a brace 110. It
will also be understood that according to a generic embodiment of
dolly 100, no attachment mechanism 106 is necessary, as the shape
of the body 102 and the weight of the brace 110 will hold the dolly
100 sufficiently in place.
[0025] A useful feature of dolly 100 is that it can be removed at
any time to expose the foot bracket 140 to allow the foot bracket
140 to be secured to the floor slab 130. Optimally, the dolly 100
is removed shortly after the tilt-up wall 170 has been sufficiently
moved into place that it is time to secure the foot bracket to the
floor slab 130. A useful feature of an attachment mechanism 106 is
that it may be strong enough to secure the dolly 100 to the foot
bracket 140 while the dolly 100 is being used to support the weight
of the brace 110 upon the floor slab 130 as the tilt-up wall 170 is
moved into its final position.
[0026] An embodiment of a dolly 100 may further include a low
friction mechanism 150 disposed about a bottom end 152 of the body
102. The low friction mechanism 150 allows independent two-axis
movement of the dolly over a foot bracket mounting surface 154. The
foot bracket mounting surface may be a floor slab 130 that forms a
floor surface in the building being constructed (building not shown
in its entirety). Alternatively, foot bracket mounting surface may
be any flat surface outside of such a structure to which the foot
bracket 140 of brace 110 may be secured to hold the tilt-up wall
170 in place.
[0027] According to one embodiment, the low friction mechanism 150
may be a caster 160 pivotally secured to bottom end 152 of body
102, see, e.g., FIG. 2. Caster 160 may include one or more wheels
162 (one shown) supported by wheel supports 164 on either side of
an axle 166. The caster 160 allows the dolly 100 to roll along the
floor slab 130 in any direction. With a properly selected wheel
surface, the floor slab will not be gouged by the lower end 105 of
brace 110. The various configurations and functioning of casters
160 are known to those skilled in the art, and thus, will not be
further elaborated herein. It will be understood that while an
embodiment of a single-wheeled caster 160 is shown, other
configurations with more than one wheel or wheeled bearing
mechanism may provide the functionality required of the low
friction mechanism 150 for use on a flat surface such as the floor
slab 130 of the present invention. According to the embodiment of
dolly 100 shown in FIG. 2, body 102 may be adapted or configured to
surround a lower leg 156 and the foot bracket 140.
[0028] Referring now to FIG. 3, a perspective view of another
embodiment of a tilt-up wall brace dolly 300 with a cylindrical
body 302 is shown. Cylindrical body 302 may be a section of steel
pipe with an opening at the top 358 of the body 302 for receiving
the foot bracket 140 (not shown in FIG. 3 because it is inside
cylindrical body 302) of tilt-up wall brace 210. Dolly 300 is
attached to the lower end 305 of brace 210 by attachment mechanism
306, which comprises a threaded bolt 312 with a handle 314,
threadably engaged to body 302. According to another embodiment of
dolly 300, the attachment mechanism 306 may be a hand-turned screw
with a knob (see, e.g., 106 in FIG. 2) passing through a threaded
opening 316 in the body 302 and configured to provide a friction
fit against a lower leg 156 (not shown in FIG. 3) of the tilt-up
wall brace 210. The friction fit provided by attachment mechanism
302 should be sufficient to secure the dolly 300 on the lower leg
156 by the application of pressure against a lower leg 156 (not
shown in FIG. 3), or the foot bracket 140 (also not shown in FIG.
3) or some other structural feature of the lower end 305 of brace
210.
[0029] A caster 360 may be attached to the bottom end 352 of
cylindrical body 302, by welding 367 or any other suitable means,
such as bolting or with a threaded engagement (neither shown),
according to other embodiments of the present invention. Caster 360
may include a bearing 368 to allow full rotation of the wheel
supports 364, wheel 362 and its associated axle 366. According to
one embodiment of dolly 300, the body 302 may be a cylindrical
member with an opening at top end 358 for receiving the lower leg
156 (not shown in FIG. 3) and the foot bracket 140 (not shown in
FIG. 3).
[0030] In yet another embodiment of dolly 300, the attachment
mechanism may include a "cam mechanism" or lock that is activated
by a lever. The cam mechanism may include an eccentric wheel
configured for selectively providing a friction fit against a lower
leg of the tilt-up wall brace. The friction fit provided by such a
cam mechanism must be sufficient to secure the dolly on the lower
leg. The workings and applications of a cam mechanism, such as
described above, will be within the knowledge of one of ordinary
skill in the art and, thus, will not be further elaborated
herein.
[0031] FIGS. 4A and 4B are perspective views of embodiments of
tilt-up wall brace dollies 300 and 300A being used during the
erection of a tilt-up wall, according to the present invention. As
shown in FIG. 4A, two dollies 300 and 300A may be placed over the
lower ends 305 of two tilt-up wall braces 210. Dolly 300 includes
an attachment mechanism 306 (FIG. 4B). Attachment mechanism 306
includes a handle 314 attached perpendicularly to a threaded bolt
312. Attachment mechanism 306 may be used by a construction worker
(not shown in FIG. 4A or 4B) to secure the dolly 300 to the lower
end 305 of tilt-up wall brace 210. The alternative embodiment,
dolly 300A, does not include an attachment mechanism 306. The
weight of the tilt-up wall brace 210 is generally sufficient to
maintain the cylindrical body 302 around the lower leg 256 (not
shown, but see FIGS. 1A-1B) and foot bracket 220 (not shown, but
see FIGS. 1A-1B) even without the more secure use of an attachment
mechanism 306.
[0032] Using dollies 300 and 300A attached to the tilt-up wall
braces 210, the wheels 362 are free to roll along the surface of
floor slab 330 in any suitable direction (two-axis movement) as the
tilt-up wall 370 is maneuvered into place. Once the tilt-up wall
370 is in place, the dollies 300 and 300A may be removed. Removal
of dolly 300 simply requires unscrewing the attachment mechanism
306 using handle 314, lifting the brace 210 off of the floor slab
330 and slipping the cylindrical body 302 off of the brace 210 to
expose the lower leg 256 (not shown, but see FIGS. 1A-1B) and foot
bracket 220 (not shown, but see FIGS. 1A-1B). Removal of dolly 300A
is even simpler. One simply lifts the brace 210 off of the floor
slab 330, slips the cylindrical body 302 of dolly 300A off of the
brace 210 to expose the lower leg 256 (not shown, but see FIGS.
1A-1B) and foot bracket 220 (not shown, but see FIGS. 1A-1B). At
this point, with the dollies 300 and 300A removed from the tilt-up
wall brace, the foot brackets 220 (not shown, but see FIGS. 1A-1B)
may be secured to the floor slab 330.
[0033] It will be understood that the use of mixed types of
dollies, e.g., dollies 300 and 300A as shown in FIGS. 4A and 4B,
merely illustrates the different embodiments of dollies may be used
at the same time. A tilt-up wall contractor using the present
invention may, of course, choose to use only one of the two
different embodiments illustrated (dollies 300 or 300A) or one of
the other embodiments of a dolly 100 (FIG. 2) or other embodiments
(see, e.g., FIGS. 5 and 7 and related description, below) as shown
and described herein.
[0034] FIG. 7 is a drawing of another embodiment of a tilt-up wall
brace dolly 400, according to the present invention. Dolly 400 may
include a body 402 of any suitable shape for surrounding a foot
bracket 220 (FIGS. 1A-1B) and optionally a lower leg 256 (FIGS.
1A-1B) of a tilt-up wall brace 210 (FIGS. 1A-1B). Body 402 may be
cylindrical as shown in FIG. 7, or any other suitable shape. Body
402 may include an upper reinforcement 403 located at an upper end
404 of body 402 as shown in FIG. 7. Dolly 400 may further include
an optional attachment mechanism, shown generally at arrow 406 in
FIG. 7, which may be similar in construction and function to the
attachment mechanism 306 (FIG. 3) described above. The body 402 may
further include a lower reinforcement 407 located at a lower end
405 of body as shown in FIG. 7. Reinforcements 403 and 407 provide
a strengthened dolly 400 for repeated use and greater durability
versus similar dollies without such reinforcements (dollies 100 and
300 as described herein). Reinforcements 403 and 407 may be formed
of portions of piping with an inside diameter roughly the same as
the outside diameter of body 402. This allows the reinforcements
403 and 407 to be positioned over the cylindrical body 402 and
welded in place.
[0035] Dolly 400 may further include caster assembly 460 attached
to the lower end 405 of body 402. The caster assembly 460 may
include wheel 462 rotationally mounted to wheel supports 464, which
are in turn rotationally attached to a mounting bracket 465
configured for bolting 467 (three nuts and bolts shown in FIG. 7)
or welded (not shown, but see welding 367 in FIG. 3) to the lower
end 405 of body 402. Wheel 462 has a generally rounded tire profile
463 which is presently preferred over the generally flat tire
profile 363 (FIG. 3) on wheels 362 (FIG. 3) for quickly orienting
the caster assembly 460 during use on a floor slab (not shown in
FIG. 7).
[0036] Dolly 400 may further include an optional handle 425 (shown
in FIG. 7) with mounting arms 423 configured for attachment to body
402. Mounting arms 423 may be bolted, welded, glued or otherwise
affixed to body 402 using means known to those of ordinary skill in
the art. Mounting arms 423 may take any suitable shape or
configuration. The purpose of handle 425 is to provide a means for
allowing the user of dolly 400 to easily and conveniently grip
dolly 400 by hand during installation and/or removal of the dolly
400 on a tilt-up wall brace (not shown). The particular composition
and shape of handle 425 are not important, only its
functionality.
[0037] It will be understood that other embodiments of a tilt-up
wall brace dolly need not surround the entire lower leg 156 (FIG.
2), 256 (FIGS. 1A-1B), 556 (FIG. 5, see discussion below) or foot
bracket 140 (FIG. 2), 220 (FIGS. 1A-1B). For example, the dolly may
simply be in a platform configuration with multiple, swiveling
casters to support the platform. FIG. 5 is an example of such an
alternative embodiment of a dolly 500 for use with a tilt-up wall
brace 510, according to the present invention. Dolly 500 may
include a body 502 supported by a plurality of casters 560 (two
shown, although three or more will be needed for stability) mounted
to a bottom surface 522 of body 502. The plurality of casters 560
forms a low friction mechanism 550 that allows dolly 500 to move
freely over the floor surface 524 (two-axis movement). The body 502
of dolly 500 may be a planar panel formed of a sturdy material, for
example and not by way of limitation, wood, plastic, metal or
composite material, having suitable strength for supporting foot
bracket 520 and the weight of brace 510. The casters 560 may
include wheels 562 or another similar mechanism with bearings or
bushings (not shown) for rolling on floor slab 530. Each of the
casters 560 may also be configured to swivel with bearings in a
race or sealed mechanism (not shown for simplicity of
illustration). This swiveling mechanism may be attached to the
wheel supports 564 near the place where the caster 560 is attached
to the body 502, according to one embodiment.
[0038] The body 502 of dolly 500 may further include a shoe 590 for
receiving a portion of foot bracket 520 to at least partially
secure the foot bracket 520 to the top surface 526 of body 502. The
foot bracket 520 may further be secured to the top surface 526 of
body 502 using one or more straps 580. The straps may be formed of
elastic material, leather or any other suitable material for
temporarily securing the foot bracket 520 to the dolly 500. Such
straps may be secured to the body 502 using any suitable fastener
mechanism including pins, clamps, hook and loop material, etc. Such
various fastener mechanisms will be within the knowledge of those
of ordinary skill in the art.
[0039] According to another embodiment of dolly 500, body 502 may
include a bolt or post (neither shown) extending from the top
surface 526 and configured for engagement with the mounting slot
(not shown) in foot bracket 520 to further secure the dolly 500 to
the foot bracket 520. It will be understood that each foot bracket
520, or 140 (FIG. 2) or 220 (FIGS. 1A and 1B), will generally
include a mounting slot or hole for receiving a mounting bolt to
secure the foot bracket to the floor slab. For example and not by
way of limitation, see mounting slot 24 and mounting bolt 26 in
foot bracket 20 of FIG. 2 and related discussion in U.S. Pat. No.
4,379,650 to Frankenfield, the contents of which are incorporated
by reference herein for all purposes.
[0040] It will be understood that the particular configuration of
the dolly 500 illustrated in FIG. 5 is merely exemplary. Other
embodiments may have no shoe 590. Still other embodiments may have
no straps 580. Still another embodiment may simply have an
indentation (not shown) formed in the top surface 526 of body 502
for receiving foot bracket 520 in place. Of course there are many
other combinations or alternative means for temporarily supporting
or securing foot bracket 520 to dolly 500. All such alternative or
equivalent means are considered to be within the scope and spirit
of the present invention.
[0041] The dollies described herein, 100, 300, 300A and 500 are
configured to be used with conventional tilt-up wall braces, 110,
210 and 510. However, it will be readily apparent that the dollies
described herein may also be incorporated into the design of new
and novel tilt-up wall braces having similar technical features.
Alternatively, the dollies described herein, 100, 300, 300A and 500
may be considered a subsystem of such a novel brace.
[0042] For example, an embodiment of such a novel tilt-up wall
brace is disclosed. The embodiment of a brace may include an
elongated beam. The embodiment of a brace may further include a
wall bracket attached to an upper end of the elongated beam. The
wall bracket may be configured for mounting to a tilt-up wall. The
embodiment of a brace may further include a foot bracket attached
to a lower end of the elongated beam. The foot bracket may be
configured for mounting to a foot bracket mounting surface, such as
a floor slab. The embodiment of a brace may further include a
tilt-up wall brace dolly configured for selective attachment to the
foot bracket. The dolly may further include a body configured for
selectively receiving, holding and releasing the foot bracket. The
dolly may further include a low friction mechanism disposed about a
bottom end of the body. The low friction mechanism allows
independent two-axis movement of a bottom end of the brace over the
foot bracket mounting surface. According to another embodiment of
the brace, the dolly may further include an attachment mechanism
configured for selectively securing the body to the foot bracket.
Various embodiments may be formed from the various attachment
mechanisms disclosed herein.
[0043] FIG. 6 is a flow chart of an embodiment of a method 600 for
securing a foot bracket of a tilt-up wall brace to a floor slab,
according to the present invention. Method 600 may include
providing 602 a tilt-up wall brace dolly for use with a tilt-up
wall brace foot bracket. The dolly may be any one of the
embodiments of a dolly 100, 300, 300A and 500 described herein,
with a body, with or without an attachment mechanism, and including
a low friction mechanism. In yet another embodiment, the attachment
mechanism may be a shoe 590 with or without straps 580 or some
variation as described with respect to FIG. 5 herein.
[0044] Method 600 may further include attaching 604 the dolly to
the foot bracket. The attaching 604 may be accomplished with the
use of an attachment mechanism 106 (FIGS. 1A-1B) or 306 (FIGS. 3,
4A and 4B) as described herein. According to another embodiment
without an attachment mechanism, the foot bracket may simply be
placed inside the body 302 and held in place by the weight of the
tilt-up brace, see e.g., dolly 300A. According to still another
embodiment, the foot bracket may simply be placed within an
indentation (not shown) in a top surface 526 of a body 502 (see
FIG. 5). In yet another embodiment, the foot bracket may be placed
in a shoe 590 with or without straps 580 or some variation as
described with respect to FIG. 5 herein.
[0045] Method 600 may further include placing 606 the low friction
mechanism onto the floor slab. A construction worker may simply
maneuver the lower end of the tilt-up wall brace with a dolly
attached and place it on the floor slab or other brace mounting
surface so that the low friction mechanism allows the dolly to roll
on the surface. Method 600 may further include guiding 608 the
dolly along the floor slab to a desired mounting location. A
construction worker may push the lower end of the tilt-up wall
brace with a dolly attached on the floor slab as the tilt-up wall
is being moved into place as desired.
[0046] Method 600 may further include removing 610 the dolly from
the foot bracket. Removal 610 of the dolly may be achieved by
unscrewing an attachment mechanism 106 or 306, or unstrapping the
foot bracket (see FIG. 5), or simply lifting the foot bracket out
of body 302 or off of body 502, as described herein.
[0047] Method 600 may further include securing 612 the foot bracket
to the floor slab at the desired mounting location. Securing 612
the foot bracket may be achieved using concrete mounting bolts or
other fasteners known to those of ordinary skill in the art.
[0048] According to one embodiment of method 600, providing 602 the
tilt-up wall brace dolly may include providing a cylindrical body
with an opening at one end for receiving the foot bracket and lower
leg of a tilt-up wall brace, see e.g., FIGS. 1A, 1B, 3, 4A and 4B
and related discussion above. According to another embodiment the
attachment mechanism may be a screw rotationally disposed within a
threaded hole in the cylindrical body, as described herein. The
screw may be configured to selectively apply pressure against the
lower leg. According to another embodiment, the low friction
mechanism may be a caster mounted to an opposite end of the
cylindrical body, as described herein.
[0049] While the foregoing advantages of the present invention are
manifested in the detailed description and illustrated embodiments
of the invention, a variety of changes can be made to the
configuration, design and construction of the invention to achieve
those advantages. Hence, reference herein to specific details of
the structure and function of the present invention is by way of
example only and not by way of limitation.
* * * * *