GB2611761A

GB2611761A - Rebar installation using utility backpack

Info

Publication number: GB2611761A
Application number: GB2114594.1A
Authority: GB
Inventors: Bowerman Hugh; Callear Jason
Original assignee: Laing Orourke PLC
Current assignee: Laing Orourke PLC
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2023-04-19
Also published as: WO2023061780A1; GB202114594D0

Abstract

A wearable apparatus 100 for rebar installation comprising: a power supply; a housing for holding one or more consumable materials; a connective arrangement 110 to interface with tools 115; and a control system for providing electronic communication between the power supply and the connective arrangement. It may also have a communication system which may include a wireless communication module and/or a power output converter such as a hydraulic pressure converter. The power supply may be a battery which may be monitored by the control system and which may also record operations performed by the user. The control system may also remotely download a controller for a connected tool. A method of rebar installation is also disclosed.

Description

REBAR INSTALLATION USING UTILITY BACKPACK

[0001] The present disclosure relates to a wearable apparatus for rebar installation, and a method of using same.

BACKGROUND

[0002] Conventional construction processes routinely require the positioning and fixing of reinforcing bars ("rebars") in order to strengthen concrete structures. The bars to be used are delivered to an assembly area, such as a factory if being made into off-site cages, or their final location if being fixed in-situ. Positioning and fixing of the rebars can then take place [0003] The methods of positioning and fixing rebar are currently labour intensive. The fixing step in particular has traditionally relied on tie-wire. This is wire which is looped IS around two bars crossing at 90 degrees, before the wire loop is twisted to tighten the wire.

Wire tying conventionally involves an operator bending down and manually looping the wire and then twisting it tight using pliers. In factory conditions, rebars will alternatively or additionally be welded together.

[0004] These operations can fatigue the operators, reducing the quality of their work as well as endangering their safety and the safety of others.

SUMMARY

[0005] Examples of preferred aspects and embodiments of the invention are as set out in the accompanying independent and dependent claims.

[0006] This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.

[0007] In a first aspect of the disclosed technology, there is provided a wearable apparatus for rebar installation, comprising: a power supply, a connective arrangement operable to interface with one or more tools; a housing for holding one or more consumable materials operable to be used by the one or more tools; and a control system for providing electronic communication between the power supply and the connective arrangement.

[0008] In the field of rebar fixing, hand tools conventionally combine an energy source, a control system, consumables, and tooling into one hand-held device. The energy supply may be external, for example via a power cable or occasionally from a backpack housed multiple battery pack.

[0009] A rebar for use in construction typically goes through various steps, including cutting, bending, positioning, and fixing. Cutting and bending are normally carried out on automated machines away from a work area. The bars are then delivered to an assembly area, such as a factory if being made into off-site cages, or their final location if being fixed in-situ. Positioning and fixing then take place.

[0010] The methods of positioning and fixing rebar can be labour intensive. The fixing operation in particular conventionally relies on fie-wire. This is wire which is looped around two bars crossing at 90 degrees, and the wire loop twisted to tighten the wire. Under some conditions rebars can be welded together.

[0011] Wire tying can involve the operator bending down and manually looping the wire and then twisting it tight using pliers. To speed up the tying process, and thereby reduce the fatigue on the operator, electrically powered equipment has been developed that IS automatically loops and twists the wire. Further, the power source for the electrical equipment has been replaced by batteries. Equipment is typically targeted at bars up to 20 mm diameter, weighing up to 4kg. A new wire spool is required to be loaded about every 150 ties under normal use. For larger diameter bars, a heavier tool will be required with more frequent reloading of wire. Heavier equipment will result in more operator fatigue, if indeed it is practical to be used at all.

[0012] The invention allows for the rate at which the more accessible ties can be made to be increased, especially for larger bar diameters (>20 mm). This is done in such a manner as to reduce operator fatigue, which itself benefits safety.

[0013] This invention involves separating out the energy source, consumables and control system, and locating them in a wearable apparatus, optionally in the form of a utility backpack. Tooling can be connected to the backpack via a cord, also referred to as an "umbilical". This arrangement facilitates a range of improvements to the way in which rebar is fixed on site. The net result is higher productivity, more control, better ergonomics and improved sustainability.

[0014] The resulting tool is significantly reduced in weight, in some embodiments by approximately 50%. This lighter weight tool is either hand held, in which case the operator must still bend down to fie a wire, or mounted at the end of a lightweight pole, in which case bars can be tied from an upright position. If ties are made from standing, many more ties can be made per hour since the time taken to move from location to location is reduced. With an ergonomically designed back-pack it is possible for an operative to carry approximately 12 kg of weight for prolonged periods. Spool wastage is reduced, and overall efficiency improved.

[0015] A specific advantage of this approach is that for the same weight of hand tool as presently used, a tool capable of working with larger and/or heavier materials, such as rebars, is possible. This extends the practical range of hand tools on site, further enhancing productivity.

[0016] Optionally, the wearable apparatus further comprises a communication system.

Optionally, the communication system comprises a wireless communication module equipped with one or more of Bluetooth; 4G; 5G; a local WiFi hotspot; and/or a global positioning system (GPS).

[0017] The use of a communication system equipped with a wireless communication module, such as that capable of accessing a 5G data connection, allows for the moving of as much intelligence and data gathering into a cloud storage system as possible. This provides a number of advantages, including safer data backups, scalable data storage options, more efficient data analysis, and synchronisation between a plurality of devices.

[0018] Further, remote data storage means that a smaller controller in the wearable IS apparatus itself is needed, reducing weight and complexity in manufacture. The need to manually transfer data is eliminated, and the wearable apparatus acts as a localised communications hub for other local users.

[0019] The combination of a 5G connection with GPS can provide a tracking capability for the wearable apparatus, providing an accurate position at all times of the operator. This can prevent unauthorised usage, including usage by unauthorised personnel and/or usage within unauthorised construction areas.

[0020] Optionally, the consumable materials comprise one or more of: tying wire; welding wire; hydraulic fluid; adhesive cartridges; and/or a tying clip.

[0021] Consumable materials are considered to be materials which are used while the tool is in operation, and require intermittent refilling if operation with the tool is to be maintained. For example, a tool such as a glue gun for applying adhesives will require a supply of adhesive in order to carry out its intended function. Therefore, as the tool is used, the supply of adhesive will diminish. A refill of adhesive will be required. By providing a repository or housing in which to store consumable material within the wearable apparatus, efficiency may be improved. The amount of consumable material remaining is monitored and transmitted via the communication system to an operator when it falls below a threshold level.

[0022] The amount and/or type of consumable material to be provided to the tool during operation is coordinated by the control system. The consumable itself is stored within and/or adjacent the wearable apparatus in a housing, such as a vacant space within the wearable apparatus or a handle adjacent the wearable apparatus. The or each storage arrangement may be referred to as a "housing" for the or each consumable material.

[0023] Optionally, the wearable arrangement further comprises a power output converter in electronic communication with the power supply.

[0024] For some tools, the output from the power supply of the wearable apparatus requires modulation before it can be safely supplied to a particular tool. For example, the voltage output from a battery pack may require conversion to a different voltage before it can be used for a particular rebar-tying tool. In such cases, the output from the power supply of the wearable apparatus can be passed through a power output converter and converted to an appropriate value [0025] In the case of a tool for capacitor discharge stud welding, the capacitors are relatively small and lightweight and so are suitable for housing in the wearable apparatus.

The capacitors can be charged from a direct current battery either in the wearable apparatus or at an external location.

[0026] In some cases the power supply of the wearable apparatus comprises a mid-frequency direct current (MFDC) system in order to magnify and control a current input to IS a tool.

[0027] Optionally, the power output converter comprises a hydraulic pressure converter.

Optionally, the wearable apparatus further comprises a hydraulic pump.

[0028] Hydraulic systems can provide a low volume, high pressure means of actuating various tools, resulting in a relatively high energy density particularly for hand tools. In order for a hydraulic system localised within the wearable apparatus to be usable for a range of tools interfaced with the wearable apparatus, a hydraulic pressure converter may be required in order to set the hydraulic settings to an appropriate level for a particular tool. The hydraulic pump may then be used to actually actuate the tool itself. The precise levels may be set by the control system, once the nature of the hydraulic tool has been ascertained.

[0029] Optionally, the power supply is a battery. Optionally, the battery has a capacity of more than 1 kWh. Optionally, the battery is interchangeable. Optionally, the control system is operable to provide battery management and/or battery monitoring.

[0030] Battery technology has been improving consistently, and current batteries can provide sufficient power density with solid state control to power a range of different tools.

The use of a localised power source within the wearable apparatus, such as one or more batteries, reduces reliance on grid-based power consumption, particularly if construction is taking place in an area without reliable grid electricity supplies.

[0031] Further, the need for trailing power cables around a potentially hazardous building site is reduced, reducing the risk of accidents taking place. A battery may also provide a level of protection against unexpected electrical surges, as can be experienced from a grid-based system. To prevent the wearable apparatus remaining inactive unnecessarily, depleted batteries can be removed from the wearable apparatus, and replaced with charged batteries. The user can therefore continue their work without waiting for the battery to recharge.

[0032] It is appreciated that supplementary power sources may be used as well, for example solar panels. For devices with a lower energy requirement, such as a communication device linked to the wearable apparatus, a solar panel placed on the wearable apparatus may provide a useful source of energy. Energy received from a solar panel or other alternative energy source may also be useful if the power supply from the battery was interrupted or became depleted. This allows for the maintenance of a communication link between the wearable apparatus and the user and/or a remote central command centre.

[0033] Optionally, the control system is operable to record one or more operations performed by a user operating the wearable apparatus [0034] By recording operations performed by the user, such as the number of rebars tied together, statistically relevant data may be gathered. For example, after a predetermined IS amount of time at work, a user may require a break. Alternatively or additionally, after a predetermined amount of work has been performed, a replacement battery and/or consumable material cartridge may be required, and so an alert can be transmitted via the communication system.

[0035] Optionally, the apparatus in the form of a backpack. Optionally, the backpack has a total weight of between 5-12 kg. Optionally, in use, the centre of mass of the backpack is located to minimise the offset from the spine of a user.

[0036] A backpack represents an ergonomic and convenient means for transporting weight, while minimising injury over a long term to a user. By keeping the centre of mass adjacent the spine of a user, the moment exerted on a user's spine is minimised, thereby reducing fatigue and potential long-term safety complications. A waist belt may be used to firmly fix the wearable apparatus to the user's body, keeping the weight in an optimal position to reduce the risk of injury. Other forms of the wearable apparatus are also possible, such as a belt and/or any piece of clothing equipped with the necessary components.

[0037] A wearable apparatus may weigh approximately up to 10% of the weight of a user before there is a risk of long term damage. By limiting the weight of the wearable apparatus to 5-12 kg, users weighing 50 kg or more may be able to comfortably operate a tool linked to the wearable apparatus. This broadens the scope of users who can operate the wearable apparatus, as some heavier tools have conventionally required physically larger users in order to safely operate.

[0038] Optionally, the connective arrangement is a cord. Optionally, in use, the control system is operable to detect a connected tool from the one or more tools interfaced with the connective arrangement. Optionally, the control system is operable to remotely access and/or download a controller for the connected tool via the communication system. Optionally, the connected tool is a hand-held tool. Optionally, the connected tool is operable via a pole. Optionally, the connected tool comprises one or more of: a drill; an impact wrench; an angle grinder; an electric bar bender; a hydraulic bar bender; a tool for aligning rebar; a connector tightening tool; a welding tool; a tying tool; a crimping-type connector; a hydraulic jack; and/or a hydraulic wedge. Optionally, the control system is operable to disable one or more tools interfaced with the connective arrangement.

[0039] The control system can serve as a point of contact between various electronic systems equipped within the wearable apparatus, as well as optionally providing a link between a user and/or a remote central command centre and the apparatus itself. The control system can comprise a switch, operable by a user, and/or a processor operable to carry out more complex tasks.

[0040] In order for some tools to be used effectively, a particular control system is required. For example, the control system may mandate the speed at which a particular IS component is to rotate, or a maximum safe power which can be exerted. This control system can be different for each different type of tool, or even for updated models compared to older models of tool.

[0041] Conventionally, each tool is pre-loaded with a fixed control system which typically remains unchanged throughout the lifetime of the tool. This can add significant weight and cost to the tool. This arrangement also limits the updatability of the tool, if improved control systems are developed or new facts come to light regarding the safety margins of that particular model.

[0042] By removing the control system from the tool, and providing a tool-agnostic control system within a wearable apparatus, the tool itself may be significantly reduced in weight and cost. The control system can detect the precise nature of the tool, and remotely download from a cloud server a latest version of the specialised control system for that tool in particular. This allows for improvements to be made throughout the lifetime of the tool, improving efficiency during the use of the tool, and enhancing the safety of the users.

[0043] By linking the control system with the operation of the tool, use of the tool may be restricted according to the requirements of the owner of the wearable apparatus. For example, a tool may only be used within a designated geographical area, or by a particular user who is qualified to do so. This reduces the risk of theft, as well as reducing the risk that a non-qualified operator will be able to use a tool which they are not qualified to operate.

[0044] The tool linked to the wearable apparatus may be any tool which requires electrical, hydraulic, and/or pneumatic power in order to operate. It is appreciated that a large number of tools fall under this umbrella, including hand tools, vehicles, and fixed tools. For example, a small, self-levelling tracked electric vehicle in electronic communication with the control system may be powered by the wearable apparatus. Similarly, automated guided vehicles (AGVs) can be used to move objects too heavy for a user by to move by themselves without risk of injury. For pneumatic tools, an air receiver can be included in the wearable apparatus. The power source of the wearable apparatus can power a compressor to pressurise the air receiver.

[0045] Optionally, the wearable apparatus comprises one or more retractable legs.

[0046] The use of legs can provide a support to the operator when wearing the wearable apparatus. The weight of the wearable apparatus may be transferred from the back of the operator to the floor. This reduces fatigue on the operator, thereby allowing them to carry out their work more comfortably, and with a lower chance of injury. The legs may be self-levelling to ensure stability for the operator, and so further reduce the risk of injury.

[0047] According to a further aspect, there is provided a method of rebar installation, comprising the steps of: connecting a tool to a wearable apparatus comprising a control system; detecting the tool via the control system; downloading a controller for the tool from IS a remote server; and providing power to the tool from a power supply in the wearable apparatus. Optionally, the method of rebar installation further comprises the step of: fixing a connection between two or more rebars.

[0048] It will also be apparent to anyone of ordinary skill in the art, that some of the preferred features indicated above as preferable in the context of one of the aspects of the disclosed technology indicated may replace one or more preferred features of other ones of the preferred aspects of the disclosed technology. Such apparent combinations are not explicitly listed above under each such possible additional aspect for the sake of conciseness.

[0049] Other examples will become apparent from the following detailed description, which, when taken in conjunction with the drawings, illustrate by way of example the principles of the disclosed technology.

BRIEF DESCRIPTION OF THE DRAWINGS

[0050] FIG. 1 shows an exemplary arrangement of the wearable apparatus for vertical [0051] FIG. 2 shows an exemplary arrangement of the wearable apparatus for horizontal [0052] FIG. 3 shows a preformed clip used to fix rebars together, [0053] FIG. 4 shows a dual-armed clamping tool used to close the preformed clip of FIG. 3; [0054] FIG. 5 shows the wearable apparatus in use on a building site; [0055] FIG. 6 shows an exemplary arrangement of the wearable apparatus for use with a consumable-using tool; and [0056] FIG. 7 shows an exemplary arrangement of the wearable apparatus with extendable legs.

[0057] The accompanying drawings illustrate various examples. The skilled person will appreciate that the illustrated element boundaries (e.g., boxes, groups of boxes, or other shapes) in the drawings represent one example of the boundaries. It may be that in some examples, one element may be designed as multiple elements or that multiple elements may be designed as one element. Common reference numerals are used throughout the figures, where appropriate, to indicate similar features.

DETAILED DESCRIPTION

[0058] The following description is made for the purpose of illustrating the general IS principles of the present technology and is not meant to limit the inventive concepts claimed herein. As will be apparent to anyone of ordinary skill in the art, one or more or all of the particular features described herein in the context of one embodiment are also present in some other embodiment(s) and/or can be used in combination with other described features in various possible combinations and permutations in some other embodiment(s).

[0059] Figure 1 of the accompanying drawings shows an exemplary arrangement of the wearable apparatus for vertical work. In this figure, there is shown a wearable apparatus 100 being operated by a user 105. The wearable apparatus 100 comprises a power supply (not shown), in electronic communication with a power output converter.

[0060] The power supply may be in the form of one or more batteries, housed within the wearable apparatus 100. The battery capacity may be greater than or equal to 1 Kilowatt-hour (kWh). It is appreciated that battery technology may be improved to the point where battery energy density will be 400 VVh/kg, compared to contemporary conventional high-end batteries which have an energy density of 270 VVh/kg. Newer batteries may also charge faster, thereby reducing waiting time for an operator.

[0061] A weld can be required to fix two rebars together. It is estimated a 10mm long x 5 leg tack weld requires circa 8000 J to make. It has a strength of >5 kN. If the wearable apparatus weighs 12 kg in total, 5 kg may be dedicated to a battery. In such a case, where the payload is a battery of capacity 250 VVh/kg with system efficiency of 80%, then a single charge can make 450 tack welds, which is the equivalent of 450 conventional ties. This would use approx. 1.5 kg of welding wire.

[0062] If this welding were done in a 4 hour half-shift, the rate of welding would be approximately 2.5 times the rate of tying. Batteries could be recharged during breaks. An issue to consider in such a scenario would be the presence of water in the form of rain. Evaporating off 0.2 cc of water from a weld area would require an additional 500 J per weld. Compressed air stored or generated within the wearable apparatus can be used to blow water clear of the weld area, providing a more effective and energy efficient welding arrangement.

[0063] The wearable apparatus 100 of this embodiment also comprises a communication system (not shown). The communication system can provide wireless connectivity and communication with external electronic devices. Further, the wearable apparatus 100 can provide a local communications hotspot, e.g., a local WFi point. This facilitates improved signal and increased battery life on hand held mobile devices nearby, allowing other workers on a site to communicate more efficiently.

[0064] Additionally, the communication system may provide wireless communication to another electronic device, for example via one or more of: Bluetooth, 4G, 5G, and/or a local WiFi station. The communication system may be operated through a wireless hand held remote control. GPS positioning may be used in order to geolocate the wearable apparatus 100, for example to ensure that the apparatus remains within a restricted approved zone.

[0065] The wearable apparatus 100 also comprises a connective arrangement 110 operable to interface with one or more tools 115. In this embodiment, the connective arrangement 110 is in the form of an umbilical cord, comprising a power cord, wire duct, and a signal cable. The tool 115 is a tool for tying wire in order to fix two rebars together. The power cord 110 can also include a wire duct and signal cables. It is appreciated that other forms of connective arrangement 110 are possible, for example a plug and socket arrangement, or a wireless communication and/or power transfer arrangement between the wearable apparatus 100 and the tool 115.

[0066] The tool 115 of this embodiment is equipped with an extendable arm so that the operator 105 may use the tool 115 for ground-level work without bending over which may place increased stress on the operator's back and other joints. Increased stress increases the risk of damage to the operator's body, as well as increased fatigue. It is appreciated that more than one tool may be connected to the wearable apparatus 100, and used simultaneously.

[0067] The wearable apparatus 100 also comprises a control system (not shown) for providing electronic communication between the power supply, communication system, and tool 115 connected to the connective arrangement 110. The control system, optionally comprising a processor, serves as the point of contact between the various electronic systems equipped within the wearable apparatus 100.

[0068] The control system may ascertain the power requirements of the specific tool 115 connected via the power cord 110, and ensure that the correct level of power is provided.

If the correct level of power is not provided, for example because the battery within the wearable apparatus 100 is insufficient, an alert may be sent to the operator 105 and/or a remote central command office via the communication system.

[0069] Battery management generally may also be managed by the control system. In particular, the use of batteries within the wearable apparatus 100 requires that the operator and/or a remote central command office monitor the battery level to ensure that the necessary power can be provided to the tool 115. The control system can provide updates regarding the battery level via the communication system, as well as prompting the operator to recharge the battery if necessary.

[0070] The control system may also provide a repository for data recording, for example regarding the work performed with the tool within a predetermined time frame. Data may be gathered regarding the number of rebars fixed together, and then used, for example, to improve efficiency within certain sectors of the building area, or providing additional training to operators where required.

I [0071] The control system may also control the operation of a tool 115 according to other factors, such as location and/or impact detection through a sensor. If the tool 115 is being used in a location which is not approved, for example if the wearable apparatus 100 were stolen and being used off-site, any tools 115 connected to the wearable apparatus 100 may be remotely deactivated. If an impact were detected, for example if debris were to strike an operator 105 wearing the wearable apparatus 100, then the control system may automatically deactivate the tool 115 thereby reducing the risk of any further hazards. The control system may also be in electronic communication with other local control systems via the communication system. In such a way, if a user 105 wearing a wearable apparatus 100 were in the path of a vehicle equipped with a control system, the user 105 and/or the operator of the vehicle could be warned about the risk of collision given the proximity of the two control systems. A site safety officer may also be automatically notified about the risk of collision, and so appropriate steps could be taken to reduce the risk in that particular geographical area or by that particular vehicle.

[0072] The wearable apparatus 100 may further comprise a mini-rack with controllers for miscellaneous equipment. This may serve the operator 105 to operate one or more further pieces of equipment, and/or provide a further base for attachments which may be useful for additional tasks.

[0073] FIG. 2 shows an exemplary arrangement of the wearable apparatus for horizontal work. In this arrangement, there is shown the wearable apparatus 100 being operated by the user 105. The user 105 is using the tool 115 for horizontal work, resulting in the tool 115 being held at an approximately 90 degree angle from the user's body.

[0074] Holding the tool 115 at such an angle can cause fatigue to the user 105. Fatigue may be reduced by limiting the weight of the tool 115. This can be performed by removing certain components from the tool 115 and housing them within the wearable arrangement 100. For example, the tool 115 may be a hand tool such as a drill which conventionally requires a battery. Batteries can represent a significant proportion of the weight of a conventional hand tool. By using a battery within the wearable apparatus 100, connected to the tool 115 and moderated by the control system such that the power requirements of the specific drill connected via the power cord 110 are met, the weight of the tool 115 itself can be significantly reduced.

[0075] FIG. 3 shows a preformed clip 300 used to fix rebars together. The clip 300 comprises two peaks 305. The peaks 305 have a trough therebetween. The distance between the peaks and the trough is arranged to allow for tolerances in the diameters of rebars to be fixed together. In one example, the distance between the peaks and the trough is between 2-3 mm. The two ends of the clip 300 each comprise a hook 310. The hooks 310 can be gripped by a specialised tool and moved closer together so as to reduce the area within the clip 300 when viewed from above.

I [0076] FIG. 4 shows a dual-armed clamping tool 400 used to close the preformed clip of FIG. 3. In use, the tool 300 is arranged to hold two rebars together. The preformed clip 300 is slotted over the crossing point of two rebars 410. The clamping tool 400 comprising two arms carries the clip into position. The tips of the arms 405 engage with the hooks on the bottom of the clip.

[0077] The two hooks 310 are gripped by a welding tip of the tool 405, and pushed together to enclose the crossing rebars 410. Closing the arms of the clamping tool 400 tightens the clip 300 around the rebars. The clip 300 is shaped to have sections that can deform plastically in order to allow for any tolerances in the diameter of the rebars and/or the clamping tool 400 itself.

[0078] Closure of the two arms 405 results in the hooks 310 at the bottom of the clip 300 coming into contact with each other. The tool 400 is connected to a negative electrode 415 on one arm, and a positive electrode 420 on the other arm. The potential difference between the two arms forms a contact for a resistance spot weld, and passing a current between the two arms welds the hooks 310 together. Insulation 425 may be provided within the arms of the tool 400 in order to concentrate the current at the welding tips 405 of the tool 400. Once the weld is complete, the clamping tool 400 is removed from the fixed rebar, and another clip 300 can be loaded into the tool 400.

[0079] The clamping process itself can be strengthened through the use of a piston 430 fixed between the arms of the clamping tool 400. The piston 430 can be activated to either increase or decrease the pressure between the arms of the clamping tool 400, thereby fixing the clip 300 in place before the welding takes place.

[0080] FIG. 5 shows the wearable apparatus 100 in use on a building site. Rebar is a conventional building material, and may be involved in some assembly on a building site itself, rather than ahead of time in a factory environment.

[0081] On a building site, large and heavy machinery such as cranes 505 may be used.

The crane 505 of this embodiment comprises a crane hook 510, linked to an electric chain hoist 515 via a hook. The electric chain hoist 515 is coupled to a cassette system 520 with a hydraulic bar release mechanism 535.

[0082] The cassette system 520 is operable to carry a number of rebars 525 running East-West directionally. Below the East-West rebars 525 are another set of rebars 530, running North-South directionally.

[0083] The crane 505 is used to take the weight of the rebars 525 and move them into a predetermined desired position. The electric chain hoist 515 is then plugged into the cassette system 520. The operator 105 uses the connective arrangement 110 linked to the wearable apparatus 100 to connect to the electric chain hoist 515, thereby providing IS the required power for the electric chain hoist 515 to function. The electric chain hoist 515 can then adjust the cassette system 520 so that it is parallel to the existing rebars 525.

[0084] The wearable apparatus 100 then energises the hydraulic cylinders on the release mechanism 535, thereby enabling a single bar to be released at an appropriate time in the chosen location.

[0085] Using the wearable apparatus 100, a single operator 105 can power multiple cassette systems 520. There is no longer a need to run separate power cables over a building site or from a crane, as all power to carry out the operations is via the power source on the wearable apparatus 100.

[0086] Further, this allows the cassette systems themselves to almost entirely rely on pneumatics or hydraulics alone, also referred to as a "dumb" system. This is in contrast with a "smart" system, which has a certain level of built-in intelligence and computer processing power. Although a smart system may provide some advantages, the cost is increased as is the complication of the apparatus itself. By using a "dumb" cassette system 520, apart from a power connection to the electric chain hoist 515 and one or more hydraulic release cylinders, cost and weight of the cassette system may be reduced.

[0087] The connective arrangement 110 can comprise a release system such that disconnection occurs automatically in the event of the crane 505 being raised unexpectedly. This prevents the user 105 or the wearable apparatus 100 from being hoisted into the air via the connective arrangement 110 and potentially injured.

[0088] As a further safety feature, by using the power source on the wearable apparatus 100, the control system of the wearable apparatus 100 itself can determine whether the user 105 is approved to use that particular tool and/or work in that particular site. In such a way, it is not possible for untrained or other non-approved users to place the rebars which can reduce the risk of injury or other safety issues. To minimise risk to the user 105, an interlock may be provided such that if the wearable apparatus 100 is linked to the cassette system 520, the crane 505 cannot be raised by more than a predetermined amount.

[0089] FIG. 6 shows an exemplary arrangement of the wearable apparatus 100 for use with a consumable-using tool. In this figure, the wearable arrangement 100 is in the form of a backpack, comprising two rigid shoulder straps which are worn by an operator to keep the backpack 100 in position.

[0090] The backpack 100 comprises a control system 610 adjacent a power storage module 615. The power storage module 615 is optionally in the form of a battery. The power storage module 615 is electronic communication with a power output converter (not shown), arranged to modulate the power output from the power storage module 615 as required. The backpack 100 further comprises a connective arrangement 110, operable to interface with one or more tools. The tools may be portable hand tools or larger, fixed IS tools.

[0091] The backpack 100 of this embodiment further comprises a housing for holding one or more consumable materials 620, also referred to as consumables. Some tools require specific materials to be input in order to function to their fullest capacity. For example, a tying machine may require predetermined lengths of wire to be spooled out before being twisted by a specialised tool. These materials, referred to as consumables 620, can be stored within the body of the backpack 100 in a housing, and replaced according to the requirements of the operator.

[0092] This can reduce the weight of a tool required to be carried by an operator, as a typical tool may require, for example, 400 g of consumables to be carried in a hand held device. However, a safe load of 2500 g can be provided in the wearable apparatus 100.

This results in a reduced frequency requirement for a material reload, thereby improving the efficiency of the tool use.

[0093] In one example, an operator may be required to perform a tying operation between two pieces of rebar. This operation requires a consumable 620, in the form of a length wire to be wound around the rebar. The control system 610 can detect the nature of the tool connected via the connective arrangement 110, which in this case would be a tying tool [0094] From this detection, the control system 610 considers the requirements of this particular tool, and concludes that a length of wire from the backpack 100 will required.

When so instructed, the wire is spooled out from the backpack 100 in order to be wound around the rebars. Once wound, the tool ties the wire so as to fix the rebars together. The operator can then move to the next tying site, and await a further spooling out of wire when required.

[0095] The control system 610 can be operable to detect when the supply of consumable 620 falls below a predetermined quantity, and so remind the operator, optionally via the communication system, that a refill of material is required. The refilling of the consumable material 620 may be scheduled for a convenient time, for example during a break period for the operator.

[0096] FIG. 7 shows an exemplary arrangement of the wearable apparatus 100 with extendable legs. In this figure, the wearable arrangement 100 of the preceding figures is shown, further comprising two legs 705. These legs 705 may be extendable either manually or automatically, and be stored within or adjacent the wearable apparatus 100 when not in use. Alternatively, the legs 705 may be rigid, and stored remotely when not in use.

[0097] Any reference to "an" item refers to one or more of those items. The term "comprising" is used herein to mean including the method blocks or elements identified, but that such blocks or elements do not comprise an exclusive list and an apparatus may IS contain additional blocks or elements and a method may contain additional operations or elements. Furthermore, the blocks, elements and operations are themselves not impliedly closed.

[0098] The steps of the methods described herein may be carried out in any suitable order, or simultaneously where appropriate. Aspects of any of the examples described above may be combined with aspects of any of the other examples described to form further examples without losing the effect sought.

[0099] Where the description has explicitly disclosed in isolation some individual features, any apparent combination of two or more such features is considered also to be disclosed, to the extent that such features or combinations are apparent and capable of being carried out based on the present specification as a whole in the light of the common general knowledge of a person skilled in the art, irrespective of whether such features or combinations of features solve any problems disclosed herein. In view of the foregoing description, it will be evident to a person skilled in the art that various modifications may be made within the scope of the invention.

Claims

CLAIMS1. A wearable apparatus for rebar installation, comprising: a power supply; a connective arrangement operable to interface with one or more tools; a housing for holding one or more consumable materials operable to be used by the one or more tools; and a control system for providing electronic communication between the power supply and the connective arrangement.
2. The apparatus of claim 1, further comprising a communication system.
3. The apparatus of claim 2, wherein the communication system comprises a wireless communication module equipped with one or more of: Bluetooth; 4G; 5G; a local WiFi IS hotspot; and/or a global positioning system (GPS).
4. The apparatus of claim 1, wherein the consumable materials comprise one or more of: tying wire; welding wire; hydraulic fluid; adhesive cartridges; and/or a tying clip.
5. The apparatus of any preceding claim, further comprising a power output converter in electronic communication with the power supply.
6. The apparatus of claim 5, wherein the power output converter comprises a hydraulic pressure converter. 25
7. The apparatus of any preceding claim, further comprising a hydraulic pump.
8. The apparatus of any preceding claim, wherein the power supply is a battery.
9. The apparatus of claim 8, wherein the battery has a capacity of more than 1 kWh.
10. The apparatus of claim 8 or claim 9, wherein the battery is interchangeable.
11. The apparatus of any of claims 8 to 10, wherein the control system is operable to provide battery management and/or battery monitoring.
12. The apparatus of any preceding claim, wherein the control system is operable to record one or more operations performed by a user operating the wearable apparatus.
13. The apparatus of any preceding claim, wherein the apparatus in the form of a backpack.
14. The apparatus of claim 13, wherein the backpack has a total weight of between 5-12 kg.
15. The apparatus of claim 13 or claim 14, wherein, in use, the centre of mass of the backpack is located to minimise the offset from the spine of a user.
16. The apparatus of any preceding claim, wherein the connective arrangement is a cord.
17. The apparatus of any preceding claim, wherein, in use, the control system is operable to detect a connected tool from the one or more tools interfaced with the connective arrangement.IS
18. The apparatus of claim 17 when dependent on claim 2, wherein the control system is operable to remotely access and/or download a controller for the connected tool via the communication system.
19. The apparatus of claim 17 or 18, wherein the connected tool is a hand-held tool.
20. The apparatus of any of claims 17 to 19, wherein the connected tool is operable via a pole.
21. The apparatus of any of claims 17 to 20, wherein the connected tool comprises one or more of: a drill; an impact wrench; an angle grinder; an electric bar bender; a hydraulic bar bender; a tool for aligning rebar; a connector tightening tool; a welding tool; a tying tool; a crimping-type connector; a hydraulic jack; and/or a hydraulic wedge.
22. The apparatus of any preceding claim, wherein the control system is operable to disable one or more tools interfaced with the connective arrangement.
23. The apparatus of any preceding claim, wherein the wearable apparatus comprises one or more retractable legs.
24. A method of rebar installation, comprising the steps of: connecting a tool to a wearable apparatus comprising a control system; detecting the tool via the control system; downloading a controller for the tool from a remote server; and providing power to the tool from a power supply in the wearable apparatus.
25. The method of claim 24, further comprising the step of: fixing a connection between two or more rebars.