ECHAFFAUDAGE

SCAFFOLD DEVICE

Abrégé anglais

Abstract of the Disclosure
A scaffold device comprising a wheeled frame means including
a front axle assemble and a rear axle assembly which are pivotally
interconnected about a horizontal axis whereby either of the axle
assemblies may be pivoted or rotated relative to the other. A
first post is pivotally connected at its lower end to the front
axle assembly and extends upwardly therefrom. A telescoping sup-
port is pivotally connected at its lower end to the front axle
assembly and extend upwardly to a pivotal connection with the
first post to permit the first post to be vertically positioned
regardless of the attitude of the front axle assembly A second
post is pivotally secured at its lower end to the rear axle assem-
bly and extends upwardly therefrom. A telescoping support is
pivotally connected at its lower end to the rear axle assembly and
is pivotally connected at its upper end to the second post adjacent
the upper end thereof to permit the second post to be vertically
positioned regardless of the attitude of the rear axle assembly
A platform is slidably mounted on the first and second posts and
extends therebetween. The ends of the platform are raised and
lowered by means of a winch mounted on each of the first and
second posts. Braces interconnect the posts to prevent their sep-
aration.

Revendications

The embodiments of the invention in which an exclusive
property or privilege is claimed are defined as follows:
1. A scaffold device, comprising, a wheeled frame means
comprising a front axle assembly and a rear axle assembly, said
front and rear axle assemblies being pivotally connected together
about a horizontal axis whereby one of said axle assemblies may
be pivoted relative to the other, a first support having upper
and lower ends, said first support being selectively pivotally
secured at its lower end to said front axle assembly and extending
upwardly therefrom, a second support having upper and lower ends,
said second support being selectively pivotally secured at its
lower end to said rear axle assembly and extending upwardly there-
from a platform vertically movably mounted on said first and
second supports and extending therebetween, and means for raising
and lowering said platform relative to said first and second
supports.
2. The device of claim 1 wherein said means for raising
and lowering said platform comprises a winch means.
3. The device of claim 2 wherein a winch means is secured
to each of said first and second supports, each of said winch means
being operatively connected to one end of said platform.
4. The device of claim 1 wherein a first length adjustable
member is pivotally secured at one end to said front axle assembly
and is pivotally secured at its other end to said first support,
and a second length adjustable member pivotally secured at one
end to said rear axle assembly and is pivotally secured at its
other end to said second support.
5. The device of claim 4 wherein each of said length
adjustable members comprises an inner tube member having an outer
tube member slidably received thereon, and locking means for locking
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said inner and outer tube members together to prevent relative
movement therebetween.
6. The device of claim 5 wherein said locking means com-
prises a set screw means threadably extending through said outer
tube member and into engagement with said inner tube member.
7. The device of claim 5 wherein a safety chain extends
between said outer tube member and the associated axle assembly.
8. The device of claim 5 wherein said inner tube member
has a plurality of spaced-apart openings formed therein for
receiving a pin means positioned below said outer tube member.
9. The device of claim 1 wherein each of said axle assem-
blies have inner and outer wheel members with respect to the build-
ing structure adjacent thereto, said first and second supports
being positioned adjacent said inner wheel member, said platform
extending from said first and second supports whereby a work area
is provided between the building structure and the inner wheel
members below said platform.
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Description

1056~Z4
SCAFFOLD DEVICE
-
This invention relates to a scaffold device and more parti-
cularly to a scaffold device mounted on a wheeled frame means.
Conventional scaffolding ordinarily comprises a plurality of
vertical posts which are interconnected by crossbraces and which
may be stacked on top of each other to permit workmen to work walls
or the like, The erection of the conventional scaffolds is time
consuming and is difficult when the terrain adjacent the wall or
the like is irregular. The limited width of the scaffolds requires
that additional scaffolding be placed adjacent thereto or that the
scaffolding be moved laterally as each portion of the wall is com-
pleted.
Therefore, it is a principal object of the invention to pro-
vide an improved scaffold device.
A further object of the invention is to provide a scaffold
device which is mounted on a running gear.
A further object of the invention is to provide a scaffold
device which is mounted on a wheeled frame means including means
for adjusting the attitude of the scaffold.
A further object of the invention is to provide a scaffold
device which is easily moved from location to location.
A further object of the invention is to provide a scaffold
device which is easily assembled and disassembled.
A further object of the invention is to provide a scaffold
device having the ability to be adjusted for irregular terrain.
- A further object of the invention is to provide a scaffold
device including a vertically movable platform wherein workmen may
work beneath the platform if desired.
A still further object of the invention is to provide a
scaffold device which is economical to manufacture, durable in use
; 30 and refined in appearance.

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This invention consists in the construction, arrange-
ments and combination of the various parts of the device, whereby
the objects contemplated are attained as hereinafter more fully
set forth, specifically pointed out in the claims, and illustrated
in ~he accompanying drawings, in which:
Figure 1 is a perspective view of the scaffold of this
invention positioned adjacent a wall:
Figure 2 is a side view of the scaffold;
Figure 3 is an end view of the scaffold;
Figure 4 is a sectional view seen on lines 4-4 of Figure 3;
Figure 5 is a top view;
Fi~ure 6 is an enlarged sectional view seen on lines 6-6
of Figure 5; and
Figure 7 is a sectional view seen on lines 7-7 of Figure 6.
The scaffold of this invention is referred to generally by
the reference numeral 10 while the numeral 12 refers to a wall
structure or the like extending upwardly from the ground surface
14. Scaffold 10 includes a wheeled frame means or running gear 16
of generally conventional design and similar to farm wagon running
gears. Frame means 16 includes a front axle assembly 18 and a
rear axle assembly 20 which are pivotally or rotatably connected
about a horizontal axis in conventional fashion so that either of
the axle assemblies may be rotated relative to the other. Hitch 22
extends forwardly from front axle assembly 18 for pulling the frame
means from location to location. Front axle assembly 18 includes
a pair of wheels 24 and 26 while rear axle assembly includes wheels
28 and 30. Preferably, wheel weights 32 and 34 are mounted on
~' wheels 26 and 30.
Post 36 is pivotally connected at its lower end to front
axle assembly 18 at 38 and extends upwardly therefrom adjacent
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105~i424
wheel 24. Tube 40 is pivotally connected to front axle assembly
18 at 42 adjacent wheel 26 and extends upwardly and inwardly
therefrom. Tube 40 is provided with a plurality of spaced-apart
openings 44 adapted to receive a pin 46 therein. Tube 48 slidably
or telescopically embraces the upper end of tube 40 and is pivotally
connected at its upper end to post 36 at 50. A set screw 52 thread-
ably extends inwardly into tube 48 as seen in the drawings and is
adapted to engage tube 40 to prevent telescopic movement there-
between. Pin 46 extends through one of the openings 44 immediately
below the lower end of tube 48 to prevent downward movement of
tube 48 relative to tube 50. Safety chain is connected at one end
to front axle assembly 18 and is adjustably connected to the brack-
et 56 extending outwardly from the lower end of tube 48 to prevent
tube 48 from moving upwardly relative to tube 40.
Post 36 is provided with a slot 58 formed in the inner side
; thereof for a purpose to be described in more detail hereinafter.
; Winch 60 is secured to post 36 adjacent the lower end thereof and
has a cable 62 extending upwardly therefrom over a pulley 64 rotat-
ably mounted on the upper end of post 36.
Post 66 is pivotally connected at its lower end to rear
axle assembly 20 at 68 and extends upwardly therefrom adjacent
wheel 28. Tube 70 is pivotally connected at its lower end to rear
axle assembly 20 at 72 adjacent wheel 30 and extends upwardly and
inwardly therefrom. Tube 70 is provided with a plurality of
spaced-apart openings 74 formed therein adapted to receive a pin
76. Tube 78 slidably or telescopically embraces the upper end of
tube 70 and is pivotally connected at its upper end to post 66 at
80. Set screw 82 threadably extends through tube 78 and is adapted
to engage tube 70 to prevent the telescopic or slidable movement
30 between tube 70 and 78. Safety chain 84 is connected at one end

1056424
to rear axle assembly 20 and is adjustably connected to bracket
86 extending outwardly from the lower end of tube 78 to prevent
upward movement of tube 78 relative to tube 70. Pin 76 is ex-
tended through the opening 74 immediately below tube 78 to prevent
downward movement of the tube 78 relative to tube 70.
Post 66 is provided with a vertically extending slot 88
formed in its inner side thereof for a purpose to be described in
more detail hereinafter. Winch 90 is secured to post 66 adjacent
the lower end thereof and has a cable 92 extending upwardly there-
from which extends over pulley 94 rotatably mounted on the upperend of post 66. Ladder 96 is suitably connected to rear axle
assembly 20 and post 66.
Brace 98 is connected at its upper end to post 66 adjacent
the upper end thereof and is connected at its lower end to post 36
adjacent the lower end thereof. Brace 100 is connected at its up-
per end to post 36 adjacent the upper end thereof and is connected
at its lower end to post 66 adjacent the lower end thereof. Bolt
102 extends through braces 98 and 100 at the intersection thereof.
The numeral 104 refers generally to a platform which is
selectively, vertically, movably mounted on the posts 36 and 66
- through the use of the w-nches 60 and 90. Platform 104 generally
comprises a frame means 106 including a pair of spaced-apart
supports 108 and 110 which have one end thereof slidably mounted in
the slots 58 and 88 in posts 36 and 66 respectively. Brace 112 is
connected at i*s upper end to support 108 and has its lower end
slidably mounted in slot 58. Brace 114 is connected at its upper
end to support 110 and has its lower end slidably mounted in the
slot 88. Cables 62 and 92 are connected to -the platform 104 to per-
- mit the ends of the platform to be raised or lowered relative to
the posts 36 and 66 respectively.
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lOS64Z4
The scaffold device of this invention may be easily dis-
assembled and placed on the wheeled frame means 16 when the scaf-
foldl is to be transported for long distances. When the desired
location has been reached, the scaffold is assembled as previously
described. The wheeled frame means 16 is driven or pulled adjacent
the wall 12 and the pivotal connection between the front and rear
axle assemblies does not require that the wheels be perfectly level.
In fact, either of the axle assemblies could be pivoted as much as
30 relative to the other without causing any serious problems.
When the wheeled frame means 16 is in position, post 36 is
easily vertically positioned through the use of the telescopic tubes
40 and 48. Set screw 52 is simply loosened and post 36 is pivotally
moved until its is vertically positioned. Set screw 52 is then
tightened and a pin or bolt 46 is extended through the opening 44
in tube 40 immediately below tube 48 to prevent tube 48 from moving
downwardly on tube 40. Safety chain 54 is then connected to the
bracket 56 which prevents tube 48 from moving upwardly relative to
tube 40. Post 66 is also vertically positioned in the same manner
as was post 36.
The winches 60 and 90 are operated to cause the platform
104 to be raised and lowered relative to the posts 36 and 66 to
enable the workmen t,o work on the wall structure at any desired
height. Since the platform 104 extends outwardly from the posts
36 and 66, the area beneath the platform is free and clear of
obstructions so that workmen may work on the wall structure below
the platform. The fact that each end of the platform is individu-
ally controlled by the winch on the respective post permits the
platform to be precisely adjusted regardless of whether the support-
ing axle assembly is higher or lower than the other axle assembly.
The device is easily moved along the length of the wall structure

105~i424
by simply pulling the same relative thereto.
Thus it can be seen that a novel scaffold device has been
provided which is not only safe to use but which is convenient and
wllicll does not require the time consuming erection of individual
scaffolds as in conventional scaffolding devices. Thus it can be
seen that the scaffold device accomplishes all of the stated
objectives.
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