Note: Descriptions are shown in the official language in which they were submitted.
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A PERIMETER SAFETY SCREEN ASSEMBLY
PRIORITY DOCUMENTS
[0001] The present application claims priority from:
Australian Provisional Patent Application No. 2016901878 titled "HANGING
SCREEN" and filed
on 19 May 2016; and
Australian Provisional Patent Application No. 2016904047 titled "A PERIMETER
SAFETY
SCREEN ASSEMBLY" and filed on 5 October 2016;
the content of each of which is hereby incorporated by reference in its
entirety.
INCORPORATION BY REFERENCE
100021 The following publication is referred to in the present application and
its contents are hereby
incorporated by reference in its entirety:
International Patent Application No PCT/AU2003/001112 titled "A LIFTING OR
TRANSPORTING MEANS USING A RECIPROCATING JACK" in the name of Formula One Self
Driving Screens Pty Ltd.
TECHNICAL FIELD
100031 The present disclosure relates to a perimeter safety screen assembly
for a building.
BACKGROUND
[00041 Perimeter safety screens are generally employed to provide a screen or
barrier at an edge of
floors of a building which are under construction.
[00051 Desirably, a safety screen extends above the uppermost completed floor
to protect workers
preparing formwork for a new, higher floor of the building, and extends down
to lower floors awaiting
final fixing of windows or external walls. A key limitation to screen size
however is the fact that these are
typically delivered by a semi-trailer and then craned into position. This
imposes limitations on the
physical size of screens and/or screen sub-assemblies.
[00061 It is against this background and the problems and difficulties
associated therewith that the
present invention has been developed.
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[0007] Certain objects and advantages of the present invention will become
apparent from the
following description, taken in connection with the accompanying drawings,
wherein, by way of
illustration and example, an embodiment of the present invention is disclosed.
SUMMARY
[0008] According to a first aspect, there is provided a perimeter safety
screen assembly for a building,
the perimeter safety screen assembly comprising an upper screen assembly, and
a hanging screen
assembly appending from the upper screen assembly, and extending below the
upper screen assembly.
[0009] In one form, at least one of the upper screen assembly or the hanging
screen assembly is
adapted so that the hanging screen assembly can be appended to, and removed
from the upper screen
assembly whilst the upper screen assembly is in use on the building.
[0010] In one form, the upper screen assembly is adapted so that the hanging
screen assembly can
append therefrom.
100111 In one form, the hanging screen assembly is adapted to append from the
upper screen assembly.
[0012] In one form, the hanging screen assembly depends from the upper screen
assembly.
[0013] In one form, the hanging screen assembly extends from the upper screen
assembly.
[0014] In one form, the upper screen assembly is a climbing screen assembly.
That is to say, it is
adapted to be raised with respect to the building, as work on the building
progresses.
[0015] In one form, in an alternative, the upper screen assembly is not a
climbing screen assembly, but
one which must be repositioned by means external to it, such as a crane or a
winch system.
[0016] In one form, the upper screen assembly comprises a base for securing
the perimeter safety
screen assembly with respect to the building, a frame depending from the base,
and a screen depending
from the frame.
[0017] In one form, the upper screen assembly comprises at least one platform
inside of the screen and
extending towards the building.
[0018] In one form, the upper screen assembly comprises a plurality of
vertically spaced apart
platforms.
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[00191 In one form, the hanging screen assembly comprises a frame, and a
screen depending from the
frame.
[0020] In one form, each screen is comprised of a plurality of screen panels.
100211 In one form, each screen panel comprises a frame and an infill panel.
[00221 In one form, the or each infill panel comprises a mesh. In an
alternative, the infill panel
comprises a solid panel.
[0023] In one form, the hanging screen assembly further comprises at least one
platform inside of the
screen and extending towards the building.
[00241 In one form, the hanging screen assembly comprises a plurality of
vertically spaced apart
platforms.
[00251 In one form, each of the platforms is either detachable, or movable
between extended and
retracted positions, to aid craning of the hanging screen assembly.
[0026] In one form, the hanging screen assembly depends from the upper screen
assembly on an outer
side (relative to the building) of the screen of the upper screen assembly.
[0027] In one form, in an alternative, the hanging screen assembly depends
from the upper screen
assembly on an inner side (relative to the building) of the screen of the
upper screen assembly.
[0028] In one form, in an alternative, the hanging screen assembly depends
from a lower edge of the
screen of the upper screen assembly.
100291 In one form, the screen of the hanging screen assembly forms a
continuation of the screen of the
upper screen assembly.
100301 In one form, the upper screen assembly comprises at least one mount
from which the hanging
screen assembly can be suspended.
[0031] In one form, the upper screen assembly comprises a plurality of mounts.
[00321 In one form, the upper screen assembly comprises a plurality of
vertically spaced apart mounts.
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[00331 In one form, the or each of the mounts is located on an outer side of
the screen of the upper
screen assembly.
[0034] In one form, each of these mounts comprises a saddle for nestably
receiving a portion of the
hanging screen assembly.
[0035] In one form, the or each portion is a crossmember assembly for the
hanging screen assembly. In
this context, a crossmember assembly is a transverse assembly which adds
support to the frame.
100361 In one form, in an alternative, the or each portion is a crossmember
for the hanging screen
assembly. In this context, a crossmember is a transverse piece which adds
support to the frame.
[0037] In one form, each of the mounts comprises an outwardly extending,
upwardly angled (or hook-
like) mounting guide for guiding one of the crossmembers into the saddle.
[0038] In one form, the or each of the crossmember assemblies comprises a
length adjustment means.
[0039] In one form, the or each crossmember assembly comprises a central
portion and a pair of
adjustable end portions.
[0040] In one form, each of the end portions is movable between a retracted
position and an extended
position with respect to the central portion.
[0041] In one form, the screen for each of the upper screen assembly and the
hanging screen assembly
comprises a plurality of screen panel assemblies.
[0042] In one form, each of the screen panel assemblies comprises a width
adjustment means.
100431 In one form, the or each screen panel assembly comprises a central
portion and a pair of
adjustable side portions.
100441 In one form, each of the side portions is movable between a retracted
position and an extended
position with respect to the central portion.
[0045] In one form, in an alternative, the arrangement of mounts and
crossmember assemblies could be
reversed on the upper and hanging screen assemblies.
[0046] According to a further aspect, there is provided a hanging screen
assembly for a perimeter
safety screen assembly for a building, the perimeter safety screen assembly
comprising an upper screen
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assembly and the hanging screen assembly, where the hanging screen assembly is
adapted to append from
the upper screen assembly, and extend below the upper screen assembly.
[0047] According to a further aspect, there is provided an upper screen
assembly for a perimeter safety
screen assembly for a building, the perimeter safety screen assembly
comprising the upper screen
assembly and a hanging screen assembly, where the upper screen assembly is
adapted so that the hanging
screen assembly can append therefrom, and extend below the upper screen
assembly.
[00481 According to a further aspect, there is provided a perimeter safety
screen assembly for a
building, the perimeter safety screen assembly comprising a first screen
assembly, and a second screen
assembly appending from the first screen assembly, wherein at least one of the
first screen assembly or
the second screeen assembly is adapted so that the second screen assembly can
be appended to, and
removed from the first screen assembly whilst the first screen assembly is in
use on the building.
[0049] For ease of description, a perimeter safety screen assembly embodying
the present invention is
described below in its usual assembled position as shown in the accompanying
drawings, and terms such
as front, rear, upper, lower, horizontal, longitudinal etc., may be used with
reference to this usual position.
However, the perimeter safety screen assembly may be manufactured,
transported, or sold in orientations
other than that described and shown here.
[0050] A detailed description of one or more embodiments of the invention is
provided below along
with accompanying figures that illustrate by way of example the principles of
the invention. While the
invention is described in connection with such embodiments, it should be
understood that the invention is
not limited to any embodiment. On the contrary, the scope of the invention is
limited only by the
appended claims and the invention encompasses numerous alternatives,
modifications and equivalents.
For the purpose of example, numerous specific details are set forth in the
following description in order to
provide a thorough understanding of the present invention.
[0051] The present invention may be practiced according to the claims without
some or all of these
specific details. For the purpose of clarity, technical material that is known
in the technical fields related
to the invention has not been described in detail so that the present
invention is not unnecessarily
obscured.
BRIEF IDESCRIPTION OF DRAWINGS
[0052] Embodiments of the present invention will be discussed with reference
to the accompanying
drawings wherein:
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[00531 Figure I is a schematic side view of a perimeter safety screen assembly
according to a first
embodiment;
[0054] Figure 2 is schematic side view of a perimeter safety screen assembly
according to a second
embodiment;
[0055] Figure 3 is a front view of the perimeter safety screen assembly of
Figure 2;
[0056] Figure 4 is a plan view of the perimeter safety screen assembly of
Figure 2;
[0057] Figure 5 is a schematic side view of a perimeter safety screen assembly
according to a third
embodiment;
[0058] Figure 6 is an exploded side view of the perimeter safety screen
assembly of Figure 5;
[0059] Figure 7 is a front view of the perimeter safety screen assembly of
Figure 5;
[0060] Figure 8 is a plan view of the perimeter safety screen assembly of
Figure 5, further illustrating a
hoisting frame assembly;
100611 Figure 9 is a detail view taken at 'Detail l' in Figure 5;
[0062] Figure 10 is a front view of the hoisting frame assembly illustrated in
Figures 8 and 9;
[0063] Figure 11 is a plan view of the hoisting frame assembly of Figure 10;
[0064] Figure 12 is a front view of a central portion of the hoisting frame
assembly of Figure 10;
[0065] Figure 13 is a plan view of the central portion of Figure 12;
[0066] Figure 14 is a front view of an end portion of the hoisting frame
assembly of Figure 10;
[00671 Figure 15 is a plan view of the end portion of Figure 14; and
[0068] Figure 16 is a detail view of an end plate from the end portion of
Figure 14.
[0069] In the following description, like reference characters designate like
or corresponding parts
throughout the figures.
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DESCRIPTION OF EMBODIMENTS
100701 Referring now to Figure I, there is shown a perimeter safety screen
assembly 1 depending from
completed floors 2 of a multi-storey building which is under construction.
100711 The perimeter safety screen assembly 1 comprises an upper screen
assembly 50 which, in use,
extends around a perimeter of the building and above the uppermost completed
floor, primarily to protect
workers preparing formwork for a new, higher floor of the building.
100721 The upper screen assembly 50 comprises a screen 52 comprised of a
plurality of screen panels
54, where each screen panel 54 comprises a panel frame and an infill panel (of
mesh in this case), and
where each screen panel 54 depends from a frame 60. In this embodiment, the
frame 60 comprises a
space frame structure of generally cuboid shape, and comprising a plurality of
spaced apart frame posts
62, which are bridged by a plurality of beams 64 and diagonal bracing struts
66.
[00731 The frame 60 further comprises at least a pair of vertical bracket
posts 70. As seen in Figure 3,
each bracket post 70 is connected to, but spaced apart from, a frame post 62
by a plurality of joiners 68
that are evenly spaced along the length of the bracket posts 70 and frame
posts 62. The joiners 68 are
narrower than the bracket post 70. The result is a series of elongate slots
formed between the bracket
posts 70, frame posts 62 and the joiners 68. The function of these elongate
slots will be described further
below.
[00741 Each bracket post 70 is carried upon a bracket (also referred to as
a shoe) 80 which depends
from a horizontal support beam (also referred to as a needle or a base) 90
which in turn is secured with
respect to the floor 2 slab.
[00751 Each of the brackets 80 comprise a pair of side plates that each have
flanges on their forward
edges that partly locate in front of each of the bracket posts 70. One or each
of the side plates are either
hinged or can be separated to enable the brackets 80 to be secured to a
bracket post 70.
[0076] Each of the brackets 80 comprises a latch means that is designed to
enable movement of the
bracket posts 70 in only one direction with respect to each of the brackets
80. The latch means (not
illustrated) comprises a bar which is hinged to the upper edge of one of the
side plates. The bar extends
across the bracket 80 so that it rests on the upper surface of the opposite
side plate. The bar is positioned
so that it extends through the elongate apertures formed by the spacing of the
bracket 80, screen post 62
and the joiners 68.
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[0077] The frame 60 interposes the screen 52 and the bracket posts 70 so that
the screen 52 of the upper
screen assembly 50 is horizontally spaced apart from an edge of the completed
slab 2. In this way, the
beams 64 of the frame 60 can provide support for one or more platforms (or
walkways) formed by planks
bridging these beams 64. In this way, access is provided to the edge of the
slab 2 that forms the floor.
[00781 The perimeter safety screen assembly 1 further comprises a hanging
screen assembly 150
appending from the upper screen assembly 50, and extending around a perimeter
of the building, below
the upper screen assembly 50 and down to lower floors awaiting final fixing of
windows and/or external
walls.
[00791 The hanging screen assembly 150 comprises a frame 60, and a screen 152
comprised of a
plurality of screen panels 154.
[00801 In order to accommodate this hanging screen assembly 150, the upper
screen assembly 50
comprises a plurality of mounts 100 for the hanging screen 150. Each of these
mounts 100 comprises a
saddle 102 for nestably receiving a crossmember 160 of the hanging screen 150,
and an outwardly
extending, mounting guide 104 which is upwardly angled (or hook-like) for
guiding one of the
crossmembers into the saddle 102.
[00811 In order to accommodate the mounts 100, each of beams 64 of the frame
60 comprises a length
of square hollow steel section. Each of the mounts 100 similarly comprises a
length of square hollow steel
section sized for insertion into one of the beams 64 of the frame 60 from an
outerside of the screen 52
(relative to the building). Each of the beams 64 and the mounts 100 comprises
an array of pin holes for
receiving a pin (or bolt) to secure the mount 100 to the beam 64 of the frame
60.
100821 In use, the hanging screen assembly 150 is craned (using crane lift
points) into position, and the
mounting guides 104 will guide the hanging screen 150 into its saddles 102 on
the mounts 100 as the
hanging screen assembly 150 is lowered by the crane. The hanging screen
assembly 150 will then
partially overlap the upper screen assembly 50 on its outwardly (relative to
the building) facing side at the
lower end thereof.
[00831 The perimeter safety screen assembly lfurther comprises a means for
lifting it with respect to
the building. A detailed description of one embodiment of this means can be
found in
PCT/AU2003/001112, and is incorporated herein by way of reference at least. It
should be understood
however, that alternative lifting mechanisms may be employed, or that the
etxemal lifting means such as
a crane or winch may be employed..
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[00841 In one embodiment, the lifting means comprises two hydraulic cylinders
(although these
cylinders may be substituted with a power screw or mechanical jack), where
each hydraulic cylinder
extends from a beam 90 mounted bracket 80 at a lower end thereof to a further
bracket 80, which is not
beam 90 mounted, at an upper end thereof Although two hydraulic cylinders are
described, three or
more hydraulic cylinders could also be used. In the case of two or more
hydraulic cylinders, the
important requirement is to achieve a reasonably equal rate of expansion of
each cylinder. This is easily
achieved by a person skilled in hydraulics. In addition, systems may be
provided where a single
hydraulic cylinder is used. In this case, additional support beams 90 may be
spaced laterally of the
hydraulic cylinder either at the same level as the hydraulic cylinder or above
or below it.
10085] In operation, as the hydraulic cylinder is expanding, the latch means
on the bracket 80 on the
upper end of the hydraulic cylinder will abut against the joiner and therefore
lift the bracket post 70.
Upward movement of the frame will not be prevented by the remaining brackets
80. The bar will hinge
upwardly to allow the joiners to pass as required.
[0086] In use, when the bracket post 70 is moving upwardly, a joiner will
eventually abut against the
underneath surface of the latch bar. Continued upward movement of the bracket
post 70 will result in the
bar hinging upwardly and allowing the joiner to pass whereupon the bar will
again hinge downwardly to
rest on the upper surface of the adjacent side plate. The bar will prevent
downward movement of the
bracket post 70 when the joiner abuts against the upper surface of the bar.
[00871 At the maximum extent of expansion of the hydraulic cylinder, the
joiners 68 are spaced such
that a joiner 68 will have just have passed the latch means on the bracket 80
of the lower end of the
hydraulic cylinder and the remaining brackets. Accordingly, contraction of the
hydraulic cylinder will
result in the bracket post 70 being held as the joiners abut against the upper
surface of the bar on the
bracket 80 on the lower end of the hydraulic cylinder. The latch means on the
bracket 80 on the upper
end of the hydraulic cylinder will operate to allow the bracket 80 to move
downwardly with respect to the
bracket post 70 until it reaches its lowermost position. Again, this may be
designed so that it is
conveniently placed in relation to a joiner so that upon commencement of the
expansion of the hydraulic
cylinder, the bar on the bracket 80 on the upper end of the hydraulic cylinder
will again engage a joiner to
resume lifting the bracket post 70.
[0088] In this way, the bracket post 70 is conveniently lifted in relation to
the support beams 90.
Obviously, a relatively short stroke hydraulic cylinder can be effectively
used to lift the frame.
[0089] Once the lower edge of the screen reaches its uppermost position in
relation to the support beam
90, then it is a simple process to re-position the hydraulic cylinder to an
upper level. As seen in Figure 2,
the hydraulic cylinder can be disconnected from the bracket 80 of its lower
end. The upper bracket 80 is
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disconnected from the bracket post 70. The lower bracket 80 continues to
support the frame while the
hydraulic cylinder is disconnected.
[00901 In order to provide additional support further beams 90 and brackets 80
may be secured at floors
above or below the location of the hydraulic cylinder.
[0091] In use, the hanging screen assembly 150 will hang from and below the
upper screen assembly
50, and provide protection while workers complete the façade (amongst other
things) of the building on
lower floor levels. As the upper screen assembly 50 is raised, the banging
screen 150 banging therefrom
will be raised with it.
[00921 The hanging screen assembly 150 may further comprise one or more
platforms or walkways
170 which extend from the frame 152 towards the building so as to
substantially bridge the gap between
these.
[0093] To facilitate the walkways 170, the hanging screen assembly 150
comprises a plurality of
walkway mounts 180. Each walkway mount 180 comprises a bracket secured with
respect to the frame
152 of the hanging screen assembly 150, where each bracket comprises a socket
for receiving an end of a
walkway supporting beam 174 in a cantilever fashion. An array of bolt holes
extends along each
walkway supporting beam 174, and in use, bolts can be passed through these
holes to releasably secure
the walkway supporting beam 174 with respect to the mounts 180.
[0094] The mounts 180 are arranged in groups (which extend laterally across
the hanging screen
assembly 150), with each group spaced apart lengthwise along the frame 152 of
the hanging screen
assembly 150. In this way, the walkways 170 can be positioned to match the
floor levels of the building.
[0095] Additional stability for the walkways 170 can be provided by diagonal
braces. One example of a
diagonal brace 176 extends between the frame 152 of the hanging screen
assembly 150 and the walkway
supporting beams 174, and a further example of a diagonal brace 178 extends
between the walkway
supporting beams 174 of vertically adjacent walkways 170.
[0096] If necessary, the walkways 170 can be removed, or pivoted between open
and closed positions,
and the space which exists between the screen 152 and the edge of the floors 2
can be used to pass objects
between floors 2. In one example, a small crane can be employed to lower
objects such as windows or
cladding panels from an upper floor into an intended position on the side of
the building, but inside of
screen 152, with the crane supporting the weight of the window or cladding
panel while this is positioned
and secured in place.
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[0097] Referring now to Figures 2 through 4, where there is illustrated a
perimeter safety screen
assembly la according to a further embodiment. Those parts of the perimeter
safety screen assembly la
which are identical (or near- identical) to corresponding parts shown in the
perimeter safety screen
assembly 1 of Figure 1, will be denoted by the same reference numerals and
will not be described again in
detail.
[00981 In perimeter safety screen assembly la, the outermost frame posts 62 of
the frame 60 for the
screen 52 of the upper screen assembly 50 extend higher than the innermost
frame posts 62, so that the
screen 52 may extend higher, thereby increasing the amount of protection
provided for workers at the
very top of the building.
[00991 Referring now to Figures 5 through 9, where there is illustrated a
perimeter safety screen
assembly 1000 according to a further embodiment. Those parts of the perimeter
safety screen assembly
1000 which are identical (or near- identical) to corresponding parts shown in
the perimeter safety screen
assembly 1 of Figure 1, will be denoted by the same reference numerals and
will not be described again in
detail.
[00100] The perimeter safety screen assembly 1000 comprises an upper screen
assembly 1050, which
comprises a screen 1052 comprised of a plurality of screen panel assemblies
1054.
[00101] With reference to each of Figures 7, 8 and 9, it can be seen that each
screen panel assembly
1054 comprises a central portion 1054a and a pair of adjustable side portions
1054b. Each of the side
portions 1054b is movable between a retracted position and an extended
position with respect to the
central portion 1054a. In the retracted position, the side portions 1054b
either overlap or underlap the
central portion 1054a, and in the extended position, each of the side portions
1054b extends from a side
edge of the central portion 1054a. Moreover, in this embodiment, each of the
side portions 1054b
telescopes with respect to the central portion 1054a. That is to say, each of
the side portions 1054b is
slidably received in a slot in a side edge of the central portion 1054a. In
this way, each screen panel
assembly 1054 can be widened by extension of the side portions 1054b, or
narrowed by their retraction.
By widening of screen panel assemblies 1054, gaps between adjacent perimeter
safety screen assemblies
1000 can be bridged. Narrowing of screen panel assemblies 1054 is useful
during transportation and
handling, and especially when craning these into an in use position, and
lowering them from the in use
position.
1001021 The perimeter safety screen assembly 1000 further comprises a hanging
screen assembly 1150
appending from the upper screen assembly 1050, and extending around a
perimeter of the building, below
the upper screen assembly 1050 and down to lower floors awaiting final fixing
of windows and/or
external walls.
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[00103] The hanging screen assembly 1150 comprises a frame 1160, and a
plurality of the screen panel
assemblies 1054 depending from the frame 1160. That is to say, that each
screen panel assembly 1054
comprises a central portion 1054a and a pair of adjustable side portions
1054b. Each of the side portions
1054b is movable between a retracted position and an extended position with
respect to the central
portion1054a, as described above.
[00104] The frame 1160 for the hanging screen assembly 1150 comprises a pair
of spaced apart elongate
supports 1161, from which all of the screen panel assemblies 1054 depend.
[00105] Referring now to Figures 10 through 16, where there is illustrated a
crossmember assembly
2000. The crossmember assembly 2000 comprises a central portion 2000a and a
pair of adjustable end
portions 2000b. Each of the end portions 2000b is movable between a retracted
position and an extended
position with respect to the central portion 2000a.
[00106] The central portion 2000a comprises a beam 2002 in the form of a
length of square hollow
section (SHS). Each of the end portions 2000b comprises a sleeve 2004 of SHS
which is sized to slidably
receive an end of the central portion 2000a (although this order could be
reversed). Each of the end
portions 2000b comprises a lifting lug 2006 extending from the sleeve 2004,
and the sleeve 2004
terminates at a mounting plate 2008.
[00107] At or toward each end thereof, the central portion 2000a comprises an
array of spaced apart
holes 2010; similarly, the sleeve 2004 of each end portion 2000b comprises an
array of spaced apart holes
2012. In use, the position of each end portion 2000b with respect to the
central portion 2000a can be
adjusted, and then set by passing a suitable pin or bolt through aligned holes
2010 and 2012 in each of the
central and end portions 2000a and 2000b respectively.
[00108] In use, one or more of the crossmember assemblies 2000 is extended and
secured (by bolting
and/or welding) between the spaced apart elongate supports 1161. In use, the
crossmember assemblies
2000 can be employed to hoist the hanging screen assembly 1150, by attaching a
crane hook with respect
to the lifting lugs 2006. Moreover, portions of the crossmember assemblies
2000 can be received in the
mounts 100, so as to hang the hanging screen assembly 1150 from the upper
screen assembly 1050.
[00109] The crossmember assembly 2000 is designed to be separable from the
hanging screen assembly
1150 so that the number and position of crossmember assemblies 2000 can be
adjusted and set as required
to suit both weight and balance, and structural requirements of a particular
installation.
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[00110] The crossmember assembly 2000 is designed to be length adjustable to
aid installation and
removal, and also so that it can accommodate hanging screen assemblies of
different dimensions
(especially width).
[00111] Referring now to Figure 5 and Detail 1, where there is illustrated a
winch rail 1800 depending
from the upper screen assembly 1050. A winch carriage 1820 depends from the
winch rail, and a winch
depends 1840 from the winch carriage 1820 in turn.
[00112] The winch rail 1800 comprises an I-beam 1802, which extends
transversely across a lower edge
of the upper screen assembly 1050. The I-beam 1802 is bolted to the frame of
the upper screen assembly
1050 via its upper flanges 1804.
[00113] The winch carriage 1820 comprises a roller yoke arrangement comprising
a body 1822 with a
generally parallel flange cross-section. This parallel flange cross-section
comprises a floor 1824 and a
pair of parallel flanges 1826 extending upwardly from the floor 1824. An
inwardly directed roller 1828 is
secured with respect to each of the flanges 1826. These rollers 1826 are
disposed either side of the 1-
beam 1802, and so as to run along a lower flange 1806 of the 1-beam 1802.
[00114] An eye bolt 1830 extends through the floor 1824 of the parallel flange
cross-section. The winch
1840 is suspended from this eye bolt 1830.
[00115] The winch 1840 is used to lift panels from a lower floor. The panels
would be stacked
horizontally on the lower floor, and each panel is connected to the winch line
and lifted vertically. The
winch 1840 can move laterally along the winch rail 1800 to position the panel
for fixing.
[00116] The hanging screen assembly 1150 may further comprise one or more
platforms or walkways
170 which extend towards the building. Optionally, one or more of these
platforms or walkways 170 may
comprise a flap 190, which is distal from the screen panel assemblies 1054,
and which is adapted to 1110Ne
between a closed position in which the flap bridges (and covers) a gap between
the platforms 170 and the
building, and an open position in which the gap is uncovered. When each of the
flaps is opened, external
windows or cladding can be lowered into position from above using the winch
1840, and secured by
workers standing on the platforms 170 inside of the safety screens.
1001171 The perimeter safety screen assembly according to the present
disclosure provides a greater
reach or range of screening, while overcoming difficulties associated with
moving and assembling a
larger screen.
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WO 2017/197440 PCT/AU2017/000117
14
[00118] Throughout the specification and the claims that follow, unless the
context requires otherwise,
the words "comprise" and -include" and variations such as "comprising" and
"including" will be
understood to imply the inclusion of a stated integer or group of integers,
but not the exclusion of any
other integer or group of integers.
[00119] The reference to any prior art in this specification is not, and
should not be taken as, an
acknowledgement of any form of suggestion that such prior art forms part of
the common general
knowledge.
[00120] It will be appreciated by those skilled in the art that the invention
is not restricted in its use to
the particular application described. Neither is the present invention
restricted in its preferred embodiment
with regard to the particular elements and/or features described or depicted
herein. It will be appreciated
that the invention is not limited to the embodiment or embodiments disclosed,
but is capable of numerous
rearrangements, modifications and substitutions without departing from the
scope of the invention as set
forth and defined by the following claims.
