RU2736256C2 - Assembled protective screen for perimeter fencing - Google Patents

Abstract

FIELD: construction.SUBSTANCE: invention relates to assembled protective shield for enclosure of building along perimeter. Prefabricated protective screen for perimeter fencing comprises upper screen unit and suspended screen unit suspended to upper screen unit and extending below it. In one version, the upper screen unit and/or the suspended screen unit is made so that suspension screen unit can be connected to and disconnected from the upper screen unit when said upper screen unit is mounted on the building.EFFECT: technical task of invention consists in excluding limitations on dimensions of screen or its assemblies.21 cl, 16 dwg

Description

PRIORITY DOCUMENTS

[0001] Priority of this application is claimed on Australian Provisional Application No. 2016901878, "Hanging Screen," filed May 19, 2016, and Australian Provisional Application No. 2016904047, "Prefabricated Perimeter Fence Screen," filed October 5, 2016, and the contents of each of these applications are fully incorporated into this document by reference.

INCLUSION OF OTHER DOCUMENTS BY LINK

[0002] This application refers to the following publication, the contents of which are fully incorporated into this application by reference: International Patent Application No. PCT / AU 2003/001112, entitled "Lifting or Vehicle Using a Reciprocating Jack", filed by Formula One Self Driving Screens Pty Ltd ".

TECHNICAL FIELD OF THE INVENTION

[0003] The present invention relates to a prefabricated protective screen for a building perimeter.

TECHNOLOGY LEVEL

[0004] Typically, perimeter fence screens are used to provide a barrier or barrier at the edge of the floor of a building under construction.

[0005] Desirably, the shield extends above the uppermost completed slab, protecting workers who are preparing the formwork for a new, higher slab of the building, and descending to lower floors where the final window or exterior wall installation remains to be done. However, the main limitation regarding the screen size is that usually these screens are brought on a semitrailer and then lifted by a crane to the installation site. This imposes restrictions on the physical size of the screens and / or their sub-assemblies.

[0006] The present invention has been designed to overcome the aforementioned prior art drawback and associated problems and difficulties.

[0007] Particular objects and advantages of the present invention will become apparent from the following description, made with reference to the accompanying drawings, in which an embodiment of the present invention is described by way of example and illustration.

SUMMARY OF THE INVENTION

[0008] According to a first aspect, there is provided a prefabricated protective shield for a perimeter fence of a building comprising an upper shield assembly and a suspended shield assembly suspended from and extending below the upper shield assembly.

[0009] In one embodiment, the upper screen unit and / or pendant screen unit is (s) configured such that the pendant screen unit can be attached to and detached from the upper screen unit when the upper screen unit is installed on a building.

[0010] In one embodiment, the upper shielding unit is configured such that a hanging shielding unit can extend from it.

[0011] In one embodiment, the pendant shield unit is designed to be suspended from an upper shield unit.

[0012] In one embodiment, the pendant shield assembly is associated with an upper shield assembly.

[0013] In one embodiment, the pendant screen unit extends from the upper screen unit.

[0014] In one embodiment, the upper screen unit is a lifting unit. That is, the specified block is made with the possibility of its elevation relative to the building during the continuation of construction work.

[0015] In one embodiment, alternatively, the upper screen unit is not a lifting unit and must be repositioned by means external to it, such as a crane or a winch system.

[0016] In one embodiment, the upper shielding unit includes a base that secures the prefabricated fence for the perimeter of the building to be fenced, a frame associated with the base, and a shield associated with the frame.

[0017] In one embodiment, the upper screen unit comprises at least one platform located within the screen and extending towards the building.

[0018] In one embodiment, the upper screen unit comprises vertically spaced platforms.

[0019] In one embodiment, the pendant shield assembly includes a frame and a shield associated with the frame.

[0020] In one embodiment, each screen is composed of faceplates.

[0021] In one embodiment, each bezel includes a frame and a padded bezel.

[0022] In one embodiment, said or each padded panel comprises a grid. Alternatively, the padded panel is a solid panel.

[0023] In one embodiment, the suspended screen unit further comprises at least one platform located within the screen and extending towards the building.

[0024] In one embodiment, the suspended shielding unit comprises vertically spaced platforms.

[0025] In one embodiment, each of the platforms is either detachable or moveable between an extended and retracted position to allow the suspended screen unit to be lifted by a crane.

[0026] In one embodiment, the pendant screen unit is associated with the top screen unit on the outer (building relative) side of the screen of the top screen unit.

[0027] In one embodiment, alternatively, the pendant screen unit is coupled to the top screen unit on the inner (building relative) side of the screen of the top screen unit.

[0028] In one embodiment, alternatively, the hanging screen unit is associated with the lower edge of the screen of the upper screen unit.

[0029] In one embodiment, the screen of the pendant screen unit forms an extension of the screen of the upper screen unit.

[0030] In one embodiment, the upper screen unit comprises at least one holder from which a hanging screen unit can be suspended.

[0031] In one embodiment, the upper screen unit includes a plurality of holders.

[0032] In one embodiment, the upper shield unit includes vertically spaced holders.

[0033] In one embodiment, said or each holder is located on the outside of the screen of the upper screen unit.

[0034] In one embodiment, one of said holders comprises a saddle for nesting a portion of the suspended screen unit.

[0035] In one embodiment, said or each portion comprises a cross member assembly for a suspended screen unit. In this context, a cross member assembly is a transverse assembly that provides additional support for the frame.

[0036] In one embodiment, alternatively, the specified or each part is a cross member of the suspended screen unit. In this context, a cross member is a transverse piece that provides additional support for the frame.

[0037] In one embodiment, each of the holders includes an outwardly upwardly angled (or hook-shaped) locating guide that engages one of said crossbars into the saddle.

[0038] In one embodiment, said or each cross member assembly comprises length adjusting means.

[0039] In one embodiment, said or each cross member assembly comprises a center portion and a pair of adjustable end portions.

[0040] In one embodiment, each of the end portions is movable between a retracted position and an extended position relative to the center portion.

[0041] In one embodiment, the screen of each of the blocks, the top screen unit and the hanging screen unit, comprises screen panel assemblies.

[0042] In one embodiment, each of the bezel assemblies includes a width adjustment means.

[0043] In one embodiment, said or each bezel assembly comprises a center portion and a pair of adjustable side portions.

[0044] In one embodiment, each of the side portions is movable between a retracted position and an extended position relative to the center portion.

[0045] In one embodiment, alternatively, the arrangement of the holders and cross member assemblies on the top and hanging screen units may be opposite.

[0046] In another aspect, there is provided a suspended shielding unit for a perimeter fence assembly, wherein said perimeter fence assembly comprises an upper shielding unit and a suspended shielding unit, wherein the suspended shielding unit is adapted to be suspended from the upper unit and passes below this block.

[0047] In another aspect, there is provided an upper shield assembly for a perimeter fence of a building, wherein said assembly includes an upper shield assembly and a suspended shield assembly, the upper shield assembly being configured such that the suspended shield assembly can be suspended from top screen block and can pass below it.

[0048] According to another aspect, there is provided a prefabricated protective shield for a building perimeter enclosure comprising a first shield unit and a second shield unit suspended from a first shield unit, wherein the first shield unit and / or the second shield unit is (s) configured such that the second the screen unit can be attached to and detached from the first screen unit when said first unit is installed on the building.

[0049] In order not to complicate the description, the assembled perimeter fence shield made in accordance with the present invention is described below according to its usual assembled position, as shown in the accompanying drawings, and expressions such as "front, rear, upper, lower , horizontal, longitudinal, etc. " can be used in relation to this normal position. In this case, the specified assembly screen can be manufactured, transported or implemented in other orientations, different from those described and illustrated in this document.

[0050] The following is a detailed description of some embodiments of the present invention with reference to the accompanying drawings, which illustrate the principles of the invention by way of example. While the invention has been described with reference to these embodiments, it should be understood that it is not limited to any embodiment. On the contrary, the scope of the invention is limited only by the appended claims, and the invention includes numerous alternatives, modifications and equivalent solutions. In order to fully understand the present invention, the following description sets forth numerous specific features by way of example.

[0051] The present invention may be practiced in accordance with the claims without regard to some or all of these specific features. For clarity, the technical data known in the technical fields to which the present invention pertains has not been described in detail in order to avoid unduly obscuring the understanding of the present invention.

BRIEF DESCRIPTION OF DRAWINGS

[0052] Embodiments of the present invention will be described with reference to the accompanying drawings, in which

[0053] in FIG. 1 is a schematic side view of a prefabricated protective screen for fencing a building around the perimeter, according to a first embodiment,

[0054] in FIG. 2 is a schematic side view of a prefabricated protective screen for fencing a building along the perimeter, according to a second embodiment,

[0055] in FIG. 3 is a front view of the prefabricated perimeter building barrier of FIG. 2,

[0056] in FIG. 4 is a plan view of the one shown in FIG. 2 prefabricated protective screens to fence the building along the perimeter,

[0057] in FIG. 5 is a schematic side view of a prefabricated protective screen for fencing a building around the perimeter, according to a third embodiment,

[0058] in FIG. 6 is a side view of the FIG. 5 prefabricated protective screen to fence the building around the perimeter, disassembled,

[0059] in FIG. 7 is a front view of the one shown in FIG. 5 prefabricated protective screen to fence the building along the perimeter,

[0060] in FIG. 8 is a plan view of the one shown in FIG. 5 prefabricated building perimeter shield, with an illustration of the frame hoist assembly,

[0061] in FIG. 9 is an enlarged detail 1 shown in FIG. five,

[0062] in FIG. 10 is a front view of the frame lifter assembly of FIG. 8 and 9,

[0063] in FIG. 11 is a top view of the frame hoist assembly of FIG. ten,

[0064] in FIG. 12 is a front view of the center portion of the frame hoist assembly of FIG. ten,

[0065] in FIG. 13 is a plan view of the central portion of FIG. 12,

[0066] in FIG. 14 is a front view of the end portion of the frame lifter assembly of FIG. ten,

[0067] in FIG. 15 is a plan view of the end of FIG. 14, and

[0068] in FIG. 16 is an enlarged view of the end plate of the end portion of FIG. fourteen.

[0069] In the following description, like reference numbers throughout the drawings denote like or corresponding elements.

DESCRIPTION OF MODES FOR CARRYING OUT THE INVENTION

[0070] FIG. 1 shows a prefabricated protective screen 1 for a perimeter fence extending from the completed floors 2 of a multi-storey building under construction.

[0071] The prefabricated perimeter fence shield 1 comprises an upper shielding unit 50 that, in operative position, extends around the perimeter of the building over the topmost completed floor, primarily to protect workers preparing the formwork for a new, upstream building floor.

[0072] The upper bezel 50 includes a screen 52 of bezels 54, each bezel 54 comprising a frame and a padded panel (in this case, a grid), with each bezel 54 associated with a bezel 60. Here an embodiment of the frame 60 comprises a three-dimensional frame structure having a substantially cubic shape and containing spaced frame struts 62 that are connected by beams 64 and diagonal struts 66.

[0073] The frame 60 further comprises at least a pair of uprights 70 with brackets. As shown in FIG. 3, each bracket post 70 is connected to (but spaced from) frame post 62 by means of connectors 68 that are evenly spaced along the length of said bracket posts 70 and frame posts 62. Connectors 68 are narrower than bracket post 70. As a result, a series of elongated slots are formed between the uprights 70 with brackets, frame uprights 62, and connectors 68. The function performed by these elongated grooves will be described in detail below.

[0074] Each arm 70 with brackets is supported by a bracket (also called a shoe) 80, which is associated with a horizontal support beam (also called a boom or base) 90, which, in turn, is fixed relative to the floor panel 2.

[0075] Each bracket 80 includes a pair of side plates, each of which has flanges at the front edges that are partially located in front of each of the bracket posts 70. One or each of the side plates can be either rotated or detached, allowing the brackets 80 to be attached to the rack 70.

[0076] Each arm 80 includes a locking means that allows the arms 70 with arms to move in only one direction relative to each of the arms 80. The locking means (not shown) includes a bar that is suspended from the top edge of one of the side plates. The rod extends through the bracket 80 so that it rests on the top surface of the opposite side plate. The rod is positioned to pass through the elongated holes defined by the distance between the bracket 80, the frame post 62, and the connectors 68.

[0077] The frame 60 is located between the screen 52 and the uprights 70 with brackets so that the screen 52 of the upper screen unit 50 is horizontally spaced from the edge of the completed panel 2. In this case, the beams 64 of the frame 60 can provide support for one or more platforms (or walkways) formed by strips connecting said beams 64. Thus, access is provided to the edge of the panel 2 that forms the floor.

[0078] The perimeter fence screen 1 further comprises a suspended screen unit 150 extending from the upper screen unit 50 and extending along the perimeter of the building below the upper screen unit 50, dropping down to the lower floors awaiting final installation of windows and / or exterior walls.

[0079] A pendant screen unit 150 includes a frame 60 and a screen 152 composed of screen panels 154.

[0080] To accommodate this pendant screen unit 150, the upper screen unit 50 includes holders 100 for the pendant screen 150. Each holder 100 comprises a saddle 102, into which the cross member 160 of the pendant screen 150 is inserted, and an outwardly extending mounting rail 104 that is provided with with a slope upward (or has the shape of a hook) and ensures that one of the crossbars is inserted into the saddle 102.

[0081] Each beam 64 of frame 60 includes a length of square steel to accommodate holders 100. Each holder 100 also includes a length of square steel sized to fit into one of the beams 64 of frame 60 outside (relative to the building) of screen 52. Each beam 64 and each holder 100 contains a plurality of holes into which a pin (or bolt) is inserted to secure the holder 100 to the beam 64 of the frame 60.

[0082] During installation, the hanging screen unit 150 is lifted by a crane (by the places for attaching the lifting rigging) to the desired position, and the installation guides 104 will ensure that the hanging screen 150 is inserted into the corresponding saddles 102 on the holders 100 when the block is lowered using crane. In this case, the block 150 with its lower end will partially overlap the upper screen block 150 from its outer (relative to the building) side.

[0083] The screen 1 for the perimeter fence further comprises means for raising said prefabricated protective screen relative to the building. A detailed description of one embodiment of this tool is contained in document PCT / AU 2003/001112 and is incorporated herein at least by reference. However, it should be noted that alternative hoisting devices or external hoisting means such as a crane or winch can be used.

[0084] In one embodiment, the lifting means includes two hydraulic cylinders (although these cylinders can be replaced by a power screw or a mechanical jack), with each hydraulic cylinder extending from a bracket 80 mounted on a beam 90 at the lower end of the cylinder to the next bracket 80, which is not mounted on this beam and is located at the upper end of the cylinder. Although two hydraulic cylinders are described, three or more hydraulic cylinders can also be used. When using two or more hydraulic cylinders, it is important to ensure that each cylinder is reasonably extended equally. The hydraulic specialist can easily meet this requirement. In addition, systems using only one hydraulic cylinder can be used. In this case, additional support beams 90 can be located to the side of the hydraulic cylinder, either at the same level, or above or below this cylinder.

[0085] During operation, when the hydraulic cylinder is extended, the locking means of the bracket 80 located at the upper end of the hydraulic cylinder will abut against the connector and therefore lift the post 70 with the bracket. The remaining brackets 80 will not interfere with the upward movement of the frame. The rod will pivot upward, allowing the connectors to pass when required.

[0086] In use, when the arm 70 is pushed upward, the connector will eventually rest against the bottom surface of the lock bar. Continued upward movement of the post 70 will cause the rod to pivot upward and allow the connector to pass, whereupon the rod will rotate downward again and rest on the top surface of the adjacent side plate. The rod will prevent downward movement of the post 70 when the connector abuts against the top surface of the rod.

[0087] At the maximum hydraulic cylinder extension, the connectors 68 are spaced so that the connector 68 can easily bypass the locking means of the bracket 80 located at the lower end of the hydraulic cylinder and the remaining brackets. Accordingly, shortening the hydraulic cylinder will cause the post 70 to be supported when the connectors abut the top surface of the rod on the bracket 80 at the lower end of the hydraulic cylinder. The locking means of the bracket 80 at the upper end of the hydraulic cylinder will work to move the bracket 80 downwardly relative to the bracket column 70 until it reaches the lowest position. Again, this can be done in such a way as to provide a convenient position relative to the connector so that when the hydraulic cylinder is extended, the rod on the bracket 80 at the upper end of the hydraulic cylinder will again engage the connector, allowing the post 70 to resume lifting.

[0088] Thus, the post 70 is conveniently lifted relative to the support beams 90. It will be appreciated that a relatively short stroke hydraulic cylinder can be effectively used to lift the frame.

[0089] After the bottom edge of the screen has reached its highest position relative to the support beam 90, a simple process of repositioning the hydraulic cylinder to a higher level begins. As shown in FIG. 2, the hydraulic cylinder can be detached from the bracket 80 located at the lower end of the cylinder. The upper bracket 80 is disconnected from the rack 70. The lower bracket 80 continues to support the frame while the hydraulic cylinder is disconnected.

[0090] To provide additional support, additional beams 90 and brackets 80 may be attached to the slabs above and below the location of the hydraulic cylinder.

[0091] During operation, the pendant screen unit 150 will be suspended from the upper screen unit 50, passing below it and providing protection while workers (among other operations) trim the facade of the building at the lower floor levels. When the upper screen unit 50 is lifted, the screen 150 suspended from it will rise with it.

[0092] Suspended screen unit 150 may further comprise one or more platforms or walkways 170 extending from frame 152 toward the building such that they substantially overlap the gap formed between the building and the frame.

[0093] Hanging screen unit 150 includes walkway holders 180 to facilitate holding walkway 170. Each walkway carrier 180 includes a bracket secured to frame 152 of hanging screen unit 150, each bracket having a recess to receive an end of cantilever beam 174 to support walkway. A plurality of bolt holes are provided along each walkway support beam 174, and bolts may be inserted through these holes during use to releasably secure said beam 174 relative to the holders 180.

[0094] The holders 180 are arranged in groups (extending along the lateral surface of the entire hanger 150), each group being spaced from the other along the length of the frame 152 of the hanger 150. Thus, the walkways 170 can be positioned to coincide with floor levels of the building.

[0095] Additional stability of walkways 170 can be provided through diagonal braces. A diagonal tie 176 of one type extends between the frame 152 of the suspended screen unit 150 and the beams 174 to support the walkways, and a diagonal tie 178 of another type extends between these beams 174 and vertically adjacent walkways 170.

[0096] If desired, walkways 170 can be removed or pivotally rotated between unfolded and folded positions, and the space formed between screen 152 and the edge of floors 2 can be used to transfer objects between floors 2. As one example, to lower objects from a top floor to a predetermined position on the side of a building, but within the shield 152, such as windows or cladding panels, a small crane can be used to support the weight of the window or cladding panel while it is positioned and secured in place.

[0097] FIG. 2-4 show a prefabricated protective shield 1a for a perimeter fence according to another embodiment. Elements of the screen 1a, which are identical (or similar) to the corresponding elements shown in FIG. 1 with respect to the prefabricated protective shield 1 are marked with the same reference numbers and will not be described in detail again.

[0098] In the perimeter fence screen 1a, the outermost pillars 62 of the frame 60 for the screen 52 of the upper screen unit 50 extend above the innermost frame pillars 62 so that the screen 52 can extend higher, thereby increasing worker protection at the very top of the building. ...

[0099] FIG. 5-9, a pre-fabricated perimeter fence 1000 is illustrated in accordance with another embodiment. Elements of the screen 1000 that are identical (or similar) to the corresponding elements shown in FIG. 1 with respect to screen 1 are marked with the same reference numbers and will not be described in detail again.

[00100] The assembled perimeter fence shield 1000 includes an upper shield assembly 1050 including a shield 1052 of shield panel assemblies 1054.

[00101] As depicted in each of FIGS. 7-9, each bezel assembly 1054 includes a center 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 relative to the central portion 1054a. In the retracted position, the side portions 1054b either completely or partially overlap the center portion 1054a, and in the extended position, each of the side portions 1054b extends from the side edge of the center portion 1054a. Moreover, in this embodiment, each of the side portions 1054b telescopically moves relative to the central portion 1054a. That is, each of the side portions 1054b slides into a groove formed in the side edge of the center portion 1054a. In doing so, each bezel assembly 1054 can be made wider by extending the side portions 1054b or made narrower by retracting the side portions 1054b. By expanding the screen panel assemblies 1054, the gaps formed between adjacent prefabricated perimeter fence screens 1000 can be bridged. The narrowing of the screen panel assemblies 1054 is beneficial during transportation and handling, and especially when lifting or lowering these assemblies to and from the place of use using a crane.

[00102] The perimeter fence screen 1000 further comprises a pendant screen unit 1150 extending from the upper screen unit 1050 and extending along the perimeter of the building below said node 1050 down to the lower floors awaiting final installation of windows and / or exterior walls.

[00103] A pendant display unit 1150 comprises a frame 1160 and bezel assemblies 1054 associated with the frame. Namely, each bezel assembly 1054 includes a center 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 relative to the center portion 1054a as described above.

[00104] The frame 1160 for the pendant shield unit 1150 comprises a pair of spaced-apart elongate support members 1161 to which all of the shield panel assemblies 1054 are associated.

[00105] FIG. 10-16 depict cross member assembly 2000. Assembly 2000 includes a center 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 relative to the central portion 2000a.

[00106] The center portion 2000a includes a beam 2002 in the form of a section of a square section (SHS). Each of the end portions 2000b includes an SHS sleeve 2004 sized to accommodate sliding reception of the end of the center portion 2000a (although this order can be reversed). Each end portion 2000b includes a lifting eye 2006 extending from the arm 2004, with the arm 2004 ending at the mounting plate 2008.

[00107] The center portion 2000a includes at each of its ends, or towards said ends, a plurality of spaced openings 2010. Similarly, the sleeve 2004 of each end portion 2000b also includes spaced openings 2012. In use, the position of each end parts 2000b relative to the central part 2000a can be adjusted and then fixed by inserting a corresponding pin or bolt through the aligned holes 2010 and 2012 made, respectively, in each of the parts, that is, in the central part 2000a and end parts 2000b.

[00108] In operative position, at least one cross member assembly 2000 extends and is secured (by bolting and / or welding) between spaced elongate support members 1161. In service, the cross member assemblies 2000 can be used to raise the hanging screen unit 1150 by fastening the crane hook on the lifting lugs 2006. Moreover, portions of the cross member assemblies 2000 can be inserted into the holders 100, allowing the hanging screen unit 1150 to be suspended from the upper screen unit 1050.

[00109] The crossbar assembly 2000 is designed to be detachable from the suspended shielding unit 1150 so that the number and position of the crossbar assemblies can be adjusted and set as needed to meet both weight and equilibrium requirements, as well as design requirements. for a specific structure.

[00110] The cross member assembly 2000 is adjustable in length to facilitate installation and removal, and so that the assembly can accommodate suspended shielding units of different sizes (especially different widths).

[00111] FIG. 5 and fragment 1, a winch rail 1800 is shown connected to the upper screen unit 1050. The winch carriage 1820 is connected to the winch guide, and the winch carriage 1820, in turn, is connected to the winch 1840.

[00112] The rail 1800 includes an I-beam 1802 extending laterally along the lower edge of the upper screen unit 1050. The beam 1802 is bolted to the frame of the upper screen unit 1050 through the upper flanges 1804 of this beam.

[00113] The winch carriage 1820 comprises a roller fork device comprising a housing 1822, the cross-section of which comprises generally parallel flanges. This section contains a base 1824 and a pair of parallel flanges 1826 extending upward from said base. Attached to each of the flanges 1826 is an inwardly directed roller 1828. Said rollers 1828 are located on either side of the I-beam 1802 and so that they extend along the lower flange 1806 of the I-beam 1802.

[00114] A lug bolt 1830 extends through the parallel flange base 1824. The 1840 winch is suspended from the 1830 bolt.

[00115] A winch 1840 is used to lift panels from the bottom floor. Panels should be stacked horizontally on the bottom floor and each panel is connected to a winch rope and lifted vertically. The winch 1840 can move laterally along the winch rail 1800 to a position corresponding to the panel anchorage.

[00116] The overhead screen unit 1150 may further comprise one or more platforms or walkways 170 extending toward the building. Optionally, one or more of said platforms or walkways 170 may include a flap 190 located distal to the screen panel assemblies 1054 and designed to move between a lowered position in which the flap bridges (or closes) the gap formed between the platforms 170 and the building. , and a tilted position in which the gap remains open. When each of the flaps is tilted, the external windows or cladding can be lowered from above using a winch 1840 to the work site, while the installation of these objects can be performed by workers standing on platforms 170 inside the protective screens.

[00117] The assembled perimeter fence shield according to the present invention provides greater coverage or range of shielding while eliminating the difficulty of moving and assembling larger shields.

[00118] In the description and the following claims, unless the context otherwise requires, the terms "comprise" and "include", as well as their derivatives such as "comprising" and "including" are intended to include the specified object or group of objects, but do not exclude the presence of any other object or group of objects.

[00119] Reference in this description to any prior art is not and should not be construed as an admission of any suggestion that the prior art forms part of the common knowledge.

[00120] Those of skill in the art should understand that the use of the invention is not limited to the particular application described. In addition, the present invention is not limited to its preferred embodiment with respect to the specific elements and / or features described or depicted herein. It should be understood that the invention is not limited to the embodiment or embodiments described, but numerous alterations, modifications and substitutions are possible without departing from the scope of the invention as set forth and defined in the following claims.

Claims (21)

1. A prefabricated protective screen for fencing a building around the perimeter, containing an upper screen unit and a suspended screen unit suspended from the upper screen unit and extending below it, and the upper screen unit and / or suspended screen unit is (s) made in such a way that the suspended screen unit the unit can be suspended from and detached from the upper screen unit when the said upper screen unit is installed on the building. 2. A screen according to claim 1, wherein the upper screen unit is a lifting unit that can be lifted relative to the building. 3. A shield according to claim 1 or 2, wherein the upper shield unit comprises a base that secures the prefabricated protective shield for the fence around the perimeter of the building to be fenced, a frame connected to the base, and a shield connected to the frame. 4. A screen as claimed in any one of claims 1 to 3, wherein the suspended screen unit comprises a frame and a screen associated with the frame. 5. A screen according to any one of claims 1-4, in which the suspended screen unit is connected to the upper screen unit from the outer (relative to the building) side of the screen of the upper screen unit. 6. A screen according to claim 4 or 5, wherein the upper screen unit comprises at least one holder for a hanging screen. 7. The screen of claim 6, wherein the upper screen unit comprises a plurality of holders. 8. A screen according to claim 6 or 7, wherein the upper screen unit comprises vertically spaced holders. 9. A screen according to any one of claims 6 to 8, wherein said or each holder is located on the outside of the screen of the upper screen unit. 10. A shield according to any one of claims 6-9, wherein said or each holder comprises a saddle for nesting a portion of the suspended shield unit. 11. A screen according to claim 10, wherein said or each portion of the suspended screen unit comprises a cross member assembly. 12. The screen of claim 11, wherein the suspended screen comprises vertically spaced cross member assemblies. 13. A screen according to claim 11 or 12, wherein said or each cross member assembly is located on the inner side of the screen of the suspended screen unit. 14. A screen according to any one of claims 7 to 13, in which each of the holders comprises a positioning guide for inserting at least part of one of the cross member assemblies into the saddle. 15. A screen according to any one of claims 11-14, wherein said or each cross member assembly comprises a central portion and a pair of adjustable end portions. 16. The screen of claim 15, wherein each of the end portions is movable between a retracted position and an extended position relative to the center portion. 17. A screen as claimed in any one of claims 1 to 16, wherein the screen for each of the blocks, namely the upper screen unit and the hanging screen unit, comprises screen panel assemblies. 18. The screen of claim 17, wherein each bezel assembly comprises a center portion and a pair of adjustable side portions. 19. The screen of claim 18, wherein each of the side portions is movable between a retracted position and an extended position relative to the center portion. 20. Suspended screen unit of a prefabricated protective screen for fencing a building around the perimeter, wherein said prefabricated protective screen comprises an upper screen unit and a suspended screen unit, wherein the suspended screen unit is designed to be suspended from the upper screen unit and extends below this block, and the suspended the screen unit is also designed in such a way that it can be suspended from and detached from the upper screen unit when the said upper screen unit is installed on the building. 21. Upper screen unit of a prefabricated protective screen for fencing a building along the perimeter, while said prefabricated protective screen comprises an upper screen unit and a suspended screen unit, and the upper screen unit is made in such a way that the suspended screen unit can be suspended from the upper screen unit and can pass below it, and the upper screen unit is also designed in such a way that the suspended screen unit can be suspended from the upper screen unit and detached from it when said upper screen unit is installed on the building.

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