Electrically insulating scaffold assembly and components thereof

Abstract

An insulated connector for limiting electrical transmission through a scaffold assembly, the insulated connector comprising a connector constructed at least in part from an insulating material, the connector configured to structurally connect two adjacent scaffold elements together. A scaffolding pole for limiting electrical transmission through a scaffolding assembly, the scaffolding pole comprising: a tube for vertically disposed in the scaffolding assembly; according to any one of the preceding claims, the connector is mounted and adapted and / or fastened to one end of the tube. A scaffold transverse horizontal bar for limiting electrical transmission through a scaffold system, the scaffold transverse horizontal bar comprising: a tube for substantially transverse seating in a scaffold assembly; an insulated connector is mounted and adapted and / or secured to one end of the tube. A scaffold assembly configured to limit electrical transmission through the assembly, the system comprising: a plurality of uprights, each upright comprising a hollow tube; a plurality of longitudinal horizontal bars, each longitudinal horizontal bar comprising an electrically insulating longitudinal horizontal bar attachment member connected to at least one end to attach the longitudinal horizontal bar to the upright bar; a plurality of transverse horizontal bars, each transverse horizontal bar comprising an electrically insulating transverse horizontal bar attachment member, the electrically insulating transverse horizontal bar attachment member being connected to at least one end to attach the transverse horizontal bar to the upright bar; at least one platform for connection to one or more transverse or longitudinal horizontal bars to support a worker or tool to work on the platform; and at least one insulating plug for releasably coupling the at least two uprights; wherein the electrical conduction of the entire assembly is limited when the scaffold assembly is connected to form a scaffold assembly.

Description

Technical Field

[0001] This disclosure relates to scaffolding systems, and more specifically to scaffolding systems for reducing electrical conduction in scaffolding systems. Background Technology

[0002] Various systems and structures have been developed to assist personnel in constructing and accessing buildings and other tall structures. These systems and structures include scaffolding, which may consist of numerous interlocking, slender metal or fiberglass components, assembled one by one and extending upwards from the ground, allowing personnel to climb the structure to access the work area.

[0003] However, metal scaffolding systems are conductive and can create hazardous environments when used, for example, near power sources or during thunderstorms. Furthermore, some metal systems, such as steel, are known to be heavy and prone to corrosion when exposed to the elements.

[0004] While fiberglass-based scaffolding systems can make scaffolding non-conductive, they are less stable than metal systems and lack the strength for installations at heights. Furthermore, fiberglass-based scaffolding systems typically degrade faster than metal systems. Therefore, fiberglass-based scaffolding systems are unsuitable for higher-rise / higher-rise projects and require more frequent replacements compared to metal scaffolding systems, leading to increased costs and waste.

[0005] The inventors of this technology aim to provide a scaffolding system that restricts electrical transmission throughout the scaffolding assembly and / or is robust and durable, and / or provides a novel and useful alternative to the aforementioned system. Summary of the Invention

[0006] This summary is provided to introduce a series of concepts in a simplified form, which will be further described in the detailed embodiments below. This summary is not intended to identify all key or essential features of the claimed subject matter, nor is it intended to be used alone to help determine the scope of the claimed subject matter.

[0007] This disclosure relates to a scaffolding assembly in which electrical conduction throughout the assembly is restricted. According to one embodiment, the scaffolding system includes: a plurality of uprights; a plurality of longitudinal horizontal bars, each longitudinal horizontal bar having a non-conductive longitudinal horizontal bar attachment member connected to at least one end to attach the longitudinal horizontal bar to an upright; at least one platform; and at least one non-conductive connector for releasably connecting at least two uprights. At least one of one or more non-conductive connectors, one or more longitudinal horizontal bar attachment members, and transverse horizontal bar attachment members makes the scaffolding system non-conductive or low-conductive when constructed.

[0008] In one embodiment, a plurality of transverse horizontal bars are provided, each transverse horizontal bar having a non-conductive transverse horizontal bar attachment member connected to at least one end to attach the transverse horizontal bar to an upright.

[0009] According to an embodiment, the scaffolding system includes: a plurality of uprights; a plurality of longitudinal horizontal bars, each longitudinal horizontal bar having a non-conductive longitudinal horizontal bar attachment member connected to at least one end to attach the longitudinal horizontal bar to the uprights; a plurality of transverse horizontal bars, each transverse horizontal bar having a non-conductive transverse horizontal bar attachment member connected to at least one end to attach the transverse horizontal bar to the uprights; at least one platform; and optionally, at least one non-conductive connector for releasably connecting at least two uprights. At least one of the one or more non-conductive connectors, the one or more longitudinal horizontal bar attachment members, and the one or more transverse horizontal bar attachment members ensures that the scaffolding system is non-conductive or has low conductivity when constructed.

[0010] Another embodiment relates to a scaffold horizontal bar comprising: a circular portion; and a three-sided box-shaped portion having a top and two sides extending downward and vertically from the top, thereby forming the three-sided box-shaped portion. The top of the three-sided box-shaped structure is integrally molded with the circular portion to form the horizontal bar.

[0011] Another embodiment relates to a scaffolding platform comprising: a polymer flat portion having a top surface and a bottom surface; and a bottom support portion having a plurality of metal tubular structures connected to the flat top portion. The bottom surface of the polymer flat portion is molded to include at least one pair of ribs extending outward from the center of the bottom surface. Furthermore, the polymer flat portion comprises homopolymer polypropylene and 30% to 50% long glass fibers.

[0012] Basic component naming convention

[0013] Most scaffolding systems have basic scaffolding components that form the basic structure of any scaffolding system. These components include uprights, longitudinal horizontal bars (ledgers), transverse horizontal bars (transoms), and platforms.

[0014] Uprights, also known as columns, poles, or legs, are typically long tubes or pipes that connect the entire scaffold to the ground. Their function is to transfer the entire load of the scaffold to the ground. Because uprights are of fixed length, taller scaffolds require connecting them to allow the load to be transferred directly through the structure. Longitudinal horizontal bars, also known as rungs, are tubes that extend horizontally along the length of the scaffold. They are used to support the working platforms of the scaffold.

[0015] The longitudinal horizontal bars determine the platform's erection height based on their placement. Longitudinal horizontal bars can be placed between the uprights and are constructed parallel to, for example, building walls or other work surfaces. Transverse horizontal bars, or load-bearing beams, are horizontal members that intersect the longitudinal horizontal bars at right angles. The function of transverse horizontal bars depends on their type.

[0016] The main horizontal bar provides support for the uprights and work platform by securing them in place.

[0017] Meanwhile, when placed at intervals between the main transverse horizontal bars, the intermediate transverse horizontal bars provide additional board support. The main transverse horizontal bars are positioned adjacent to the uprights, while the intermediate transverse horizontal bars are attached to the longitudinal horizontal bars between the main transverse horizontal bars. A platform, also known as a scaffold plank, deck, or scaffold board, is a plank that forms a working platform on scaffolding. Platforms serve as a support for workers to stand and place their tools while working on scaffolding. In addition to providing standing support, platforms also ensure the safety of workers when working at height.

[0018] This disclosure relates to a non-conductive or low-conductive scaffolding system. The scaffolding system comprises lightweight, high-strength metal components, including uprights, longitudinal horizontal bars, and transverse horizontal bars. These metal components are stronger and lighter than metal components (e.g., steel) used in conventional systems. Furthermore, these metal components are rust-resistant, thus making them more durable than scaffolding systems using, for example, steel.

[0019] According to one aspect of the present invention, an insulating connector is provided for limiting electrical transmission through a scaffolding system, the insulating connector comprising:

[0020] A connector, at least partially constructed of insulating material, is configured to be located at the end of a scaffolding element and to structurally connect two adjacent scaffolding elements together.

[0021] In one embodiment, the insulating connector is a gripper or wedge for connecting a longitudinal or transverse horizontal bar to an upright.

[0022] In one embodiment, the insulating connector is a plug for connecting two uprights together.

[0023] In one embodiment, the insulating connector includes a metal or other conductive substrate coated with an insulating material or otherwise covered with an insulating material, such that adjacent scaffolding elements are structurally connected but not electrically connected to each other.

[0024] In one embodiment, two fastening areas are provided on the connector to fasten the two uprights to the connector. The fastening areas are provided on the connector and spaced apart from each other, such that the two ends of the connector are separated from each other by a selected distance during installation.

[0025] In one embodiment, the fastening areas are spaced apart such that the ends of the two uprights are at least 10 mm apart.

[0026] In one embodiment, the insulating material is configured to be applied as a liquid onto the metal or other conductive substrate, and the insulating material is configured to harden on the metal or other conductive substrate.

[0027] In one embodiment, the connector includes insulating ribs to abut against adjacent uprights, such that the adjacent uprights are structurally adjacent to each other but electrically insulated from each other.

[0028] In one embodiment, the rib has a selected width to keep the ends of the uprights longitudinally spaced from each other.

[0029] In one embodiment, the rib has a selected height to prevent electrical sparks from jumping from one pole to another.

[0030] In one embodiment, the rib has a width of about 5 mm to 10 mm and / or a height of about 5 mm to 10 mm.

[0031] In one embodiment, the substrate includes a cylindrical portion or a channel-shaped support.

[0032] In one embodiment, the cylindrical portion is hollow.

[0033] In one embodiment, the insulating rib is at least partially formed by a cylindrical portion and / or by a coating.

[0034] In one embodiment, the connector is in the form of a tube, the outer surface of which is shaped to mate with the inner surface of the pole.

[0035] In one embodiment, the connector includes a tapered portion in at least one end region to facilitate insertion into another connector.

[0036] In one embodiment, one or more fastening orifices are included to receive fasteners for fastening to the upright.

[0037] In one embodiment, the gripper includes a rod and a head, with a connector mounted on the head, and the rod is configured to fit into and / or fasten to an end of a transverse horizontal bar.

[0038] In one embodiment, the head provides a support portion, the end of the transverse horizontal bar is abutted against the support portion, and the support portion keeps the transverse horizontal bar spaced from the star connector and / or the upright for insulation.

[0039] In one embodiment, the rod portion includes one or more mating grooves for fastening to the end of a transverse horizontal bar.

[0040] In one embodiment, the rod includes a fastening region spaced at a selected distance from an end to maintain separation between the transverse or longitudinal horizontal bar and the star connector and / or upright.

[0041] According to another aspect of the present technology, a scaffold upright is provided for limiting electrical transmission through a scaffolding system, the scaffold upright comprising:

[0042] Pipes used for vertical installation in scaffolding assemblies;

[0043] An insulating connector that is mounted, adapted, and / or fastened to one end of the tube.

[0044] According to another aspect of the present technology, a scaffold horizontal bar is provided for limiting electrical transmission through a scaffolding system, the scaffold horizontal bar comprising:

[0045] Pipes used for generally horizontal placement in scaffolding assemblies;

[0046] An insulating connector that is mounted, adapted, and / or fastened to one end of the tube.

[0047] According to another aspect of the present technology, a scaffolding assembly is provided, the scaffolding assembly being configured to restrict electrical transmission through the assembly, the scaffolding assembly comprising:

[0048] Multiple uprights, each upright consisting of a hollow tube;

[0049] Multiple longitudinal horizontal bars, each longitudinal horizontal bar including an electrically insulated longitudinal horizontal bar attachment member connected to at least one end to attach the longitudinal horizontal bar to an upright;

[0050] Multiple horizontal bars, each horizontal bar including an electrically insulated horizontal bar attachment member connected to at least one end to attach the horizontal bar to an upright.

[0051] At least one platform for connecting to one or more horizontal or vertical bars to support workers or tools performing operations on the platform; and

[0052] At least one insulated connector is provided for releasably connecting at least two uprights; wherein electrical conduction of the entire assembly is restricted when the scaffold assembly is connected to form a scaffold assembly.

[0053] In one embodiment, the platform includes a deck section constructed of a polymer material.

[0054] In one embodiment, the platform includes a pair of side rails constructed of hollow tubes, the pair of side rails having end hook connectors for connection to the transverse horizontal bar described herein.

[0055] While, according to one embodiment, the metal components may be made of aluminum, other low-rust metals or metal alloys that produce a lightweight system while maximizing the strength properties of the metal may also be used. In one example, structural grade aluminum, such as 6005 aluminum or other alloys, may be used.

[0056] The uprights and longitudinal horizontal bars can have a circular cross-section and can be hollow, slender tubes. However, the uprights and longitudinal horizontal bars can be constructed with other cross-sectional shapes, such as ellipses, triangles, squares, etc. The uprights can have any length, for example, from 1.0 meter to 7.0 meters. Furthermore, the longitudinal horizontal bars can have any length, for example, from 0.5 meter to 3.0 meter, and can be produced by known methods (such as extrusion).

[0057] As will be described in more detail below with reference to the accompanying drawings, the transverse horizontal bars may be made of the same or similar materials as the vertical bars and longitudinal horizontal bars, for example, using structural grade aluminum or similar low-rust, lightweight metals or metal alloys.

[0058] However, the cross-sectional shape of the transverse horizontal bar is unique, and it provides a transverse horizontal bar that is unexpectedly stronger than known transverse horizontal bars. For example, as... Figure 10 As shown, the cross-section of the horizontal bar 104 may have a circular portion 1002, which is open at one end and has attachment points 1004 and 1010 on both sides of the opening. These two attachment points 1004 and 1010 connect the circular portion 1002 to the three-sided square portion of the horizontal bar 104 at the top 1006. The three-sided square portion includes a top 1006 and two side portions 1008 and 1012 extending downwards and vertically from both ends of the top 1006. The horizontal bar can have any length, for example, from 0.5 meters to 3.0 meters.

[0059] According to embodiments, a scaffolding system may include one or more non-conductive connectors and / or one or more non-conductive attachment members, including non-conductive longitudinal horizontal bar attachment members and non-conductive transverse horizontal bar attachment members. The connectors and attachment members are made of a combination of metal (such as aluminum) and polymer. For example, the connector is a hollow tubular structure having a metal core coated with a non-conductive polymer material on at least one of the inside or outside of the tube. The length of the connector may be between about 20 cm and 40 cm. Similarly, the attachment members include metal wedges that are connected to and surrounded by a non-conductive polymer material structure. The connectors and attachment members create gaps between various metal scaffolding components, thereby forming a non-conductive or low-conductive scaffolding when properly constructed.

[0060] In one embodiment, a scaffold upright is provided for limiting electrical transmission through a scaffolding system, the scaffold upright comprising: a tube for vertically oriented within a scaffolding assembly; and an insulating connector mounted to and adapted to and / or secured to one end of the tube.

[0061] In one embodiment, a longitudinal or transverse horizontal bar for limiting electrical transmission through a scaffolding system is provided, the longitudinal or transverse horizontal bar comprising: a tube for generally transverse placement in a scaffolding assembly; and one or more insulating connectors mounted and adapted to and / or secured to one or more ends of the tube.

[0062] In one embodiment, a scaffolding assembly is provided, configured to restrict electrical transmission through the assembly. The system includes: a plurality of uprights, each upright including a hollow tube; a plurality of longitudinal horizontal bars, each longitudinal horizontal bar including an electrically insulated longitudinal horizontal bar attachment member for connection to at least one end to attach the longitudinal horizontal bar to an upright; and at least one platform for connection to one or more transverse or longitudinal horizontal bars to support workers or tools performing operations on the platform.

[0063] In one embodiment, there is at least one insulating connector for releasably connecting at least two uprights, wherein electrical conduction of the entire assembly is restricted when the scaffold assembly is connected to form the scaffold assembly.

[0064] In one embodiment, a plurality of transverse horizontal bars are also included, each transverse horizontal bar including an electrically insulating transverse horizontal bar attachment member connected to at least one end to attach the transverse horizontal bar to the upright.

[0065] In one embodiment, the platform includes a deck section constructed of a polymer material to suppress electrical transmission to the platform ends.

[0066] In one embodiment, the platform includes a pair of side rails constructed of hollow tubes, the side rails having end hook connectors for connection to two transverse horizontal bars.

[0067] According to one embodiment, the connector can be releasably inserted into the hollow end of the corresponding longitudinal horizontal bar to be connected, thereby extending the height of the scaffolding system.

[0068] According to one embodiment, a non-conductive attachment member is connected to the end of a longitudinal or transverse horizontal bar by inserting a first end of the attachment member into the end of the longitudinal or transverse horizontal bar, and securely locking the inserted attachment member by, for example but not limited to, pressing the end of the longitudinal or transverse horizontal bar onto the inserted portion of the attachment member; or, using a locking pin or bolt inserted through the end of the longitudinal or transverse horizontal bar and the inserted portion of the attachment member.

[0069] According to an embodiment, the non-conductive material may include, for example, a black nylon 6 injection molding compound and about 30% to about 50% long glass fibers, wherein the resulting product has dimensional stability, creep resistance, high impact toughness and fatigue resistance.

[0070] Suitable alternative insulation materials include short-fiber or long-fiber filled engineering polymers that require drying before processing. If this guidance is unclear, some examples are provided below:

[0071] Glass-filled polymer

[0072] Mineral-filled polymers

[0073] · Calcium or talc-filled polymers

[0074] • Polymers containing suitable additional additives

[0075] • Polypropylene (all grades of copolymers, random copolymers, or homopolymers), also including materials from the polyethylene or polyolefin family.

[0076] acetal

[0077] Polycarbonate

[0078] • ABS / HIPS / GP styrene or any other styrene-based

[0079] ·PPS

[0080] TPU

[0081] ·PEEK

[0082] Acrylic resins

[0083] According to the embodiments, the non-conductive material exhibits one or more of the following properties:

[0084] Mechanical properties: Tensile yield strength (MPa) ISO 527-2 / 1A 220

[0085] Tensile modulus (MPa) ISO 527-2 / 1A17000

[0086] Elongation at break (%) ISO 527-2 / 1A 4

[0087] Bending strength (MPa) ISO 178 350

[0088] Flexural modulus (MPa) ISO 178 15300

[0089] Notched cantilever beam impact at +23℃ kJ / m 2 ISO 180 29

[0090] Physical properties

[0091] Specific gravity - ISO 3146 1.57

[0092] Molding shrinkage, 3.17mm bar, % -0.1 to 0.3

[0093] thermal properties

[0094] HDT℃ ISO 75 215 under 1.82MPa load

[0095] Melting point (DSC) °C ISO 3146 220

[0096] In addition, non-conductive materials can be formed through injection molding and / or extrusion techniques.

[0097] According to the embodiments, non-conductive materials can be produced using the following processing guidelines:

[0098] Temperature range 260°C to 280°C

[0099] Central area 265℃ to 280℃

[0100] Front zone 270℃ to 290℃

[0101] Nozzle 270℃ to 290℃ 7

[0102] Melting point: 270°C to 290°C

[0103] Tools / Molds 95℃

[0104] Pressure injection speed 51 mm / s to 76 mm / s

[0105] Injection pressure: moderate to maximum back pressure 25 psi to 50 psi

[0106] Screw speed 30 rpm to 50 rpm

[0107] Material pad 6.4mm

[0108] Drying time / temperature: 4 hours / 82℃ to 85℃

[0109] Recommended maximum humidity: 0.2% Attached Figure Description

[0110] The accompanying drawings described herein are provided to enable a further understanding of this disclosure and form part of this disclosure.

[0111] The exemplary embodiments and descriptions of the exemplary embodiments disclosed herein are for illustrative purposes only and do not constitute any limitation thereof.

[0112] In the attached diagram:

[0113] Figure 1 This is a partial view of an exemplary scaffolding system according to the present disclosure, and shows longitudinal and transverse horizontal bars connected to the uprights via non-conductive longitudinal horizontal bar attachment members and non-conductive transverse horizontal bar attachment members, respectively.

[0114] Figure 2 A pole is shown, one end of which is releasably connected to a non-conductive connector;

[0115] Figure 3 A longitudinal horizontal bar is shown, with each end connected to a non-conductive longitudinal horizontal bar attachment member;

[0116] Figure 4 The connection of the longitudinal horizontal bar to one end of the non-conductive longitudinal horizontal bar attachment member is shown;

[0117] Figure 5 A non-conductive connector is shown;

[0118] Figure 6 The metal core of the non-conductive connector is shown;

[0119] Figure 7 A non-conductive attachment component is shown;

[0120] Figure 8 The metal core of the non-conductive attachment component is shown;

[0121] Figure 9 The non-conductive polymer portion of the non-conductive attachment member is shown;

[0122] Figure 10A cross-sectional view of the transverse horizontal bar is shown;

[0123] Figure 11 A side view of one end of the transverse horizontal bar and the non-conductive transverse horizontal bar attachment member is shown.

[0124] Figure 12 A side view is shown of the transverse horizontal bar and the non-conductive transverse horizontal bar attachment members at both ends;

[0125] Figure 13 A top view of the platform is shown;

[0126] Figure 14 A bottom view of the platform is shown;

[0127] Figure 15 A side view of the platform is shown;

[0128] Figure 16 This is an isometric view of a connector according to an embodiment of the present invention;

[0129] Figure 17 It is an isometric cross-sectional view of the connector, showing the internal metal substrate used to provide additional strength;

[0130] Figure 18 This is a longitudinal sectional view of the connector, showing the internal metal substrate;

[0131] Figure 19 This is an isometric view of an end connector overmolded onto a metal substrate;

[0132] Figure 20 It shows Figure 19 Isometric views of the longitudinal section of the end connector;

[0133] Figure 21 These are isometric views of different end connectors molded from a single piece; and

[0134] Figure 22 This is an isometric view of an overlap plate molded from polymer.

[0135] Generally, the same reference numerals will be used throughout the accompanying drawings and written description to refer to the same or similar parts. The figures are not drawn to scale. The connecting lines or connectors shown in the various figures presented herein are intended to illustrate exemplary functional relationships and / or physical or logical connections between various elements. Detailed Implementation

[0136] Figure 1 A partial view of a scaffolding system 100 according to an exemplary embodiment is shown. According to this embodiment, Figure 1A longitudinal horizontal bar 106 and a transverse horizontal bar 104 are shown, which are connected to an upright 102 via non-conductive (or electrically insulating) longitudinal horizontal bar attachment members 108 and non-conductive (or electrically insulating) transverse horizontal bar attachment members 108, respectively. As shown in the figure, the upright 102 generally extends vertically upward. Additionally, additional uprights (in...) Figure 1 (Not shown in the image) 102 can be accessed via non-conductive connector 202 (in... Figure 1 (Not shown in the image) is attached to the first upright 102.

[0137] According to one embodiment, the longitudinal horizontal bar 106 and the transverse horizontal bar 104 are connected to the connection point 110 on the upright bar 102 via their respective non-conductive attachment members 108, such that they extend horizontally and vertically from the upright bar 102.

[0138] Multiple longitudinal horizontal bars 106, transverse horizontal bars 104, and uprights 102 can be similarly connected to construct the scaffolding to the required height and width.

[0139] Figure 2 An exemplary pole 102 is shown, which has several connection points 110 and a connector 202 inserted into one end of the pole.

[0140] Figure 3 An exemplary longitudinal horizontal bar 106 is shown, which has non-conductive longitudinal horizontal bar attachment members 108 attached to both ends of the longitudinal horizontal bar 106. Figure 19 The attachment having one or more fastening grooves 198 is shown in detail for receiving the crimped end of the longitudinal horizontal bar 106.

[0141] Figure 4 Another view of one end of the longitudinal horizontal bar 106 is shown, which has a non-conductive longitudinal horizontal bar attachment member 108 attached to the end of the longitudinal horizontal bar 106.

[0142] Figure 5 and Figure 6 An exemplary embodiment of the connector 202 is shown. (As...) Figure 5 As shown, the connector 202 has a housing 502 and an internal metal core 504, and the housing 502 is made of a non-conductive material. Figure 6 The internal metal core 504 without the outer casing 502 is shown.

[0143] The metal core 504 has holes or openings 602 at one or more ends of the metal core 504. Similarly, holes or openings can be found in the housing 502 and the upright 102 such that the corresponding holes can be aligned and receive safety bolts or pins (not shown) to securely but releasably attach the connector 202 to the end of the upright 102.

[0144] Figures 7 to 8 An exemplary embodiment of the non-conductive attachment member 108 is shown. (As...) Figure 7 As shown, the non-conductive attachment member 108 includes a metal wedge 704 for securely but releasably locking the longitudinal or transverse horizontal bar 106 to a star-shaped connection point 199 on the upright 102. The non-conductive attachment member 108 also includes an insertion section 702 that inserts into the end of the longitudinal or transverse horizontal bar 106 and is secured by, for example, a crimp, pin, or bolt. Figure 8 An exemplary metal wedge 704 is shown before being combined with or inserted into the non-conductive polymer portion of the non-conductive attachment member 108.

[0145] Figure 9 and Figure 21 It shows that it does not have, for example Figure 7 , Figure 8 , Figure 19 and Figure 20 end connectors (and) Figures 16 to 18 The gripper of the internal metal reinforcement shown in the connector (in the image). This internal metal reinforcement... Figure 8 As shown in (775), and Figure 20 The internal support bracket 775 is shown in more detail below. Figure 8 and Figure 20 As shown in the image.

[0146] Figures 10 to 12 Different views of an exemplary horizontal bar 104 are shown. Figure 10 A cross-section of the transverse horizontal bar 104 is shown. As described above, the cross-section of the transverse horizontal bar 104 may have a circular portion 1002, which is open at one end and has attachment points 1004 and 1010 on both sides of the opening. These two attachment points 1004 and 1010 connect the circular portion 1002 to the channel-shaped portion of the transverse horizontal bar 104 at the top 1006 of the channel-shaped portion. The channel-shaped portion includes a top 1006 and two side portions 1008 and 1012 extending downwards and vertically from both ends of the top 1006, respectively. According to one embodiment, this unique structure can be manufactured by an extrusion process.

[0147] Figure 11An exemplary end of a horizontal bar 104 is shown, having a non-conductive attachment member 108 that inserts into and securely attaches to the end of the horizontal bar 104. Similarly, Figure 12 An exemplary horizontal bar 104 is shown, which has a non-conductive attachment member 108 inserted into and securely attached to each end of the horizontal bar 104.

[0148] The thickness of the insulating material on the surface of the substrate can be approximately 2 mm or 3 mm, but in some places it can be 1 mm, 6 mm, 4 mm, 5 mm, or 10 mm. Embodiments of the invention provide robustness, durability, and strength—high strength and corrosion resistance—while also limiting the conduction of current from, for example, one pole to another or from, for example, one longitudinal horizontal bar to another pole. By keeping the poles separated at insulating connectors, it is possible to prevent one pole from transmitting current to another. Insulating connectors are used to separate the longitudinal horizontal bar from the poles to prevent the longitudinal horizontal bar from transmitting current to the pole—for example, by using a shoulder below the connector head.

[0149] Furthermore, in some embodiments, high strength is provided not only by a robust connector with tough insulating material, but also, for example, by providing a large-area contact between the upright surface and the connector. Additionally, a secure connection exists between the ends of the longitudinal / transverse horizontal bars and the connector. The fastener is a crimped longitudinal horizontal bar tube, for example, the longitudinal horizontal bar tube is crimped onto the robust connector and embedded in its connection groove.

[0150] Figures 13 to 15 An exemplary platform 1300 that can be used in the scaffolding system disclosed herein is shown. Figure 13 A top view of platform 1300 is shown. (As shown) Figure 13 As shown, the top is made of a polymer material that forms an upper surface 1302 on which workers / users can stand safely. The platform 1300 also includes hooks 1304 that are attached to each of the four corners of the platform to releasably attach the platform 1300 to one or more transverse horizontal bars 104. Figure 14 A bottom view of platform 1300 is shown. This bottom view shows a metal longitudinal horizontal bar 1408, which is attached (e.g., welded) to side bars 1410 at both ends of a transverse horizontal bar to form a frame structure to which a polymer material bottom 1402 can be securely attached. The bottom 1402 also shows a central ridge structure 1404 and a plurality of pairs of ribs 1406 extending outward from the ridge 1404 and molded into the polymer material bottom 1404. Figure 15 A side view of platform 1300 is shown.

[0151] According to one embodiment, the polymer material used to form the top of the platform can be formed into 600mm × 600mm and 600mm × 300mm panels of polypropylene filled with 30% long glass fibers. Other materials may be used as discussed in this specification.

[0152] Platform 1300 is composed of polymer material, a central ridge 1404, ribs 1406, and a bottom metal structure (including longitudinal horizontal bars 1408 and side bars 1410), which is significantly stronger and safer than platforms currently used in scaffolding.

[0153] According to one embodiment, the platform has a heavy-duty load capacity of at least 675 kg for safe operation.

[0154] According to one embodiment, the polymer material may be, for example, a thermoplastic resin comprising homopolymer polypropylene and about 30% to about 50% long glass fibers, wherein the resulting product has dimensional stability, creep resistance, high impact toughness and thermal stability.

[0155] According to the embodiments, the polymer material exhibits one or more of the following properties:

[0156] Mechanical properties

[0157] Tensile yield strength (MPa) ISO 527-2 / 1A99

[0158] Tensile modulus (MPa) ISO 527-2 / 1A6100

[0159] Elongation % ISO 527-2 / 1A2-4

[0160] Bending strength (MPa) ISO 178 14710

[0161] Flexural modulus (MPa) ISO 178 6000

[0162] Notched cantilever beam impact at +23℃ kJ / m 2 ISO 180 / 1A18

[0163] Physical properties

[0164] Specific gravity - ISO 1183 1.12

[0165] Molding shrinkage, 3.17mm bar, % -0.3 to 0.5

[0166] thermal properties

[0167] HDT℃ under 1.82MPa load ASTM D-648 151

[0168] Furthermore, non-conductive materials can be formed using injection molding and / or extrusion techniques. This material can then be printed onto a metal substrate.

[0169] Insulated (non-conductive) connectors can be composite materials molded onto a substrate. The substrate can be a metal used to enhance strength.

[0170] According to one embodiment, non-conductive materials can be produced using the following processing guidelines:

[0171] temperature

[0172] Rear area 210℃ to 240℃

[0173] Central area 220℃ to 250℃

[0174] Front zone 240℃ to 260℃

[0175] Nozzle 260°C to 270°C

[0176] Melting point: 250°C to 260°C

[0177] Tools / Molds 80℃ to 90℃

[0178] pressure

[0179] Injection speed 50mm / s to 75mm / s

[0180] Injection pressure: moderate to maximum

[0181] Back pressure 25 psi to 50 psi

[0182] Screw speed 30 rpm to 50 rpm

[0183] Material pad 6.4mm

[0184] dry

[0185] Drying time / temperature: 2 hours / 110℃ to 120℃

[0186] Recommended maximum humidity: 0.2%

[0187] mold temperature

[0188] Polypropylene can be processed over a wide range of mold temperatures. However, where applicable, surface temperatures from 10°C to 95°C can be used.

[0189] Sometimes, users want to rent scaffolding to third parties. They will provide these parts to the third party according to the rental agreement. This arrangement will require the third party to construct the scaffolding, and the lessor will provide guidance and training on how to construct the scaffolding. In fact, the construction method of the scaffolding is the same as that of existing scaffolding. However, providing scaffolding components for rental is also within the scope of this invention. In this application, a method for safe high-altitude work is provided, the method comprising the steps of: providing scaffolding elements having insulating connectors as described in the various paragraphs herein, and connecting the scaffolding elements together into a scaffolding assembly to suppress the transmission of electricity throughout the scaffolding assembly.

[0190] Throughout this disclosure and the following claims, unless the context otherwise requires, the word “comprise” and variations such as “comprises / comprising” shall be understood to imply inclusion of the said integer or step or group of integers or steps, but not to exclude any other integer or step or group of integers or steps.

[0191] References to any prior publication (or information obtained from there, or any known matter) in this disclosure are not and should not be construed as an acknowledgment or admission, or any form of implication, that such prior publication (or information obtained from there) or known matter forms part of the common general knowledge in the field to which this specification pertains.

[0192] While various embodiments of this disclosure have been described above, it should be understood that they are presented by way of example only and not by way of limitation. It will be apparent to those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of this disclosure. Therefore, this disclosure should not be limited to any of the exemplary embodiments described above.

Claims

1. An insulated connector for limiting electrical transmission through a scaffold system, the insulated connector comprising: a connector constructed at least in part from an insulating material, the connector configured to be disposed at an end of a scaffold element and to structurally connect two adjacent scaffold elements together.

2. The insulated connector of claim 1, wherein the insulated connector is a grip or wedge for connecting a longitudinal or transverse horizontal pole to a vertical pole.

3. The insulated connector of claim 1, wherein the insulated connector is a splice for connecting two vertical poles together.

4. The insulated connector of claim 1, 2 or 3, wherein the insulated connector comprises a metal or other electrically conductive substrate coated with or otherwise encased in an insulating material, such that the adjacent scaffold elements are structurally connected but not in electrical contact with each other.

5. The insulated connector of claim 1 or 2 or 3 or 4, wherein two fastening regions are provided on the splice to fasten two of the vertical poles to the splice, the fastening regions being provided on the splice and spaced apart from each other such that the two ends of the splice are spaced apart from each other by a selected distance when installed.

6. The insulated connector of claim 1 or 2 or 3 or 4 or 5, wherein the fastening regions are spaced apart such that the ends of the two vertical poles are spaced apart by at least 10mm.

7. The insulated connector of any one of claims 1 to 6, wherein the insulating material is configured to be molded or printed in a single homogenous material, or the insulating material is configured to be applied as a liquid over the metal or other electrically conductive substrate, and in the latter case the insulating material is configured to be hardened over the metal or other electrically conductive substrate by molding or printing or other coating process.

8. The insulated connector of any one of the preceding claims, wherein the splice comprises an insulating rib located at an intermediate position along the length of the splice to abut the adjacent vertical poles, such that the adjacent vertical poles are structurally supported adjacent to each other but electrically insulated from each other.

9. The insulated connector of any one of the preceding claims, wherein the rib has a selected width to maintain the ends of the vertical poles spaced apart longitudinally from each other.

10. The insulated connector of any one of the preceding claims, wherein the rib has a selected height to inhibit electrical sparking from one vertical pole to another.

11. The insulated connector of any one of the preceding claims, wherein the rib has a width of about 5mm to 10mm and / or a height of about 5mm to 10mm.

12. The insulated connector of any one of the preceding claims, wherein the substrate comprises a cylindrical portion or a channel-shaped bracket.

13. The insulated connector of any one of the preceding claims, wherein the cylindrical portion is hollow.

14. The insulated connector of any one of the preceding claims, wherein the insulating rib is formed at least in part from the cylindrical portion and / or by coating or molding or printing.

15. An insulating connector according to any preceding claim, wherein the insulating material is a glass filled polymer.

16. An insulating connector according to any preceding claim, wherein the insulating material is selected from the group consisting of: glass filled polymer; mineral filled polymer; calcium or talc filled polymer; polymer with suitable additional additives; polypropylene (all grades of copolymer, random copolymer or homopolymer), also including polyethylene or materials in the polyolefin family; acetal; polycarbonate; ABS / HIPS / GP; styrene or any other styrenics; PPS; TPU; PEEK; acrylics.

17. An insulating connector according to any preceding claim, wherein the wedge connector for connecting to a star coupler is a composite connector having a metal support substrate for strength enhancement and the composite connector is coated or moulded or printed or otherwise covered with an insulating material.

18. An insulating connector according to any preceding claim, wherein the spigot is in the form of a tube, the outer surface of which is shaped to mate with the inner surface of the upright.

19. An insulating connector according to any preceding claim, wherein the spigot comprises a taper on at least one end region to facilitate insertion into another spigot.

20. An insulating connector according to any preceding claim, wherein one or more fastening apertures are included to receive fasteners to fasten to the upright.

21. An insulating connector according to any preceding claim, wherein the connector comprises a stem portion and a head portion, a coupler being mounted to the head portion, the stem portion being configured to fit to and / or fasten to an end of the longitudinal or transverse horizontal bar.

22. An insulating connector according to any preceding claim, wherein the head portion provides a support portion against which an end of the transverse horizontal bar rests and which keeps the longitudinal or transverse horizontal bar spaced apart from the star coupler and / or upright to achieve insulation.

23. An insulating connector according to any preceding claim, wherein the stem portion comprises one or more mating connection grooves to receive a crimped longitudinal or transverse horizontal bar tube to facilitate fastening to the end of the longitudinal or transverse horizontal bar.

24. An insulating connector according to any preceding claim, wherein the stem portion comprises a fastening region spaced a selected distance from the end to provide electrical separation between the transverse or longitudinal horizontal bar and the star coupler and / or upright.

25. A scaffold upright for limiting electrical transmission through a scaffold system, the scaffold upright comprising: a tube for being disposed vertically in a scaffold assembly; an insulating connector according to any preceding claim, the connector being mounted and fitted and / or fastened to one end of the tube.

26. A scaffold longitudinal or transverse horizontal pole for limiting electrical transmission through a scaffold system, the scaffold longitudinal or transverse horizontal pole comprising: a tube for being disposed substantially transversely in a scaffold assembly; one or more insulating connectors according to any one of the preceding claims, the one or more connectors being mounted and adapted and / or fastened to one or more end portions of the tube.

27. A scaffold assembly configured to limit electrical transmission through the assembly, the system comprising: a plurality of uprights, each upright comprising a hollow tube; a plurality of longitudinal horizontal poles, each longitudinal horizontal pole comprising an electrically insulating longitudinal horizontal pole attachment member according to any one of the preceding claims for connection to at least one end portion to attach the longitudinal horizontal pole to the uprights; and at least one platform for connection to one or more transverse or longitudinal horizontal poles to support workers or tools to work on the platform.

28. The scaffold assembly according to claim 27, further comprising at least one insulating spigot according to any one of the preceding claims for releasably coupling at least two uprights, wherein electrical conduction throughout the assembly is limited when the scaffold assembly is connected to form a scaffold assembly.

29. The scaffold assembly according to claim 27 or 28, further comprising a plurality of transverse horizontal poles, each transverse horizontal pole comprising an electrically insulating transverse horizontal pole attachment member according to any one of the preceding claims connected to at least one end portion to attach the transverse horizontal pole to the uprights.

30. The scaffold assembly according to claim 27, 28 or 29, wherein the platform comprises a deck portion constructed from a polymeric material to inhibit electrical transmission to the end of the platform.

31. The scaffold assembly according to claim 27, 28, 29 or 30, wherein the platform comprises a pair of side rails constructed from a hollow tube, the pair of side rails having end hook connectors for connection to two transverse horizontal poles.

32. A method for working at height comprising the steps of: providing a scaffold element having an insulating connector according to any one of the preceding claims; configuring the scaffold element into a scaffold assembly to inhibit transmission of electricity throughout the scaffold assembly. ​

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