SUPPORT BRACKET

Abstract

A concrete pathway formwork system, including a formwork panel for forming adjacent concrete panels of a pathway, and a support bracket for supporting the system relative to a ground surface, wherein the formwork panel has a pair of vertically opposed longitudinal rails, and the support bracket has an engagement formation which has an unlocked orientation for inserting the formation between the opposed rails to abut against the formwork panel and a rotated, locked orientation wherein the formation is locked by the rails against lateral withdrawal from the formwork panel.

Claims

1-10. (canceled)

11. A concrete formwork system for forming adjacent concrete panels on a ground surface, said concrete formwork system comprising: a formwork panel including a pair of longitudinally extending spaced-apart vertically opposed rails; and a support bracket including an engagement formation insertable between the opposed rails when in an unlocked orientation and thereafter rotatable to a locked orientation relative to the opposed rails such that the engagement formation is locked by the opposed rails against lateral withdrawal from the formwork panel.

12. The concrete formwork system of claim 11, wherein when the engagement formation is in the locked orientation, the engagement formation is unlockable from the opposed rails by rotation of the engagement formation about a lateral axis.

13. The concrete formwork system of claim 11, which includes a stake engageable with the ground surface, and wherein the support bracket defines an aperture configured to receive the stake.

14. The concrete formwork system of claim 13, wherein the stake is threaded.

15. The concrete formwork system of claim 14, wherein the threaded stake has opposed faces and the support bracket includes rotationally spaced-apart engagement portions such that the stake is able to be freely slid through the support bracket and is lockable in the support bracket by rotation of the stake about its longitudinal axis relative to the support bracket.

16. The concrete formwork system of claim 11, wherein the support bracket terminates above a lower edge of the formwork panel when the engagement formation is in the locked orientation relative to the opposed rails of the formwork panel.

17. The concrete formwork system of claim 11, wherein the formwork panel is formed as a unitary part.

18. The concrete formwork system of claim 11, wherein the formwork panel includes a pair of longitudinally extending opposed sidewalls, the opposed sidewalls defining a void therebetween.

19. The concrete formwork system of claim 11, wherein the support bracket is formed as a unitary part.

20. The concrete formwork system of claim 11, wherein the support bracket includes a central rib extending along the length of the support bracket.

21. A concrete formwork system for forming adjacent concrete panels on a ground surface, said concrete formwork system comprising: a formwork panel including a pair of longitudinally extending opposed sidewalls and a pair of longitudinally extending spaced-apart vertically opposed rails laterally extending from one of the side walls; a stake engageable with the ground surface; and a support bracket including an engagement formation insertable between the opposed rails and lockable by the opposed rails such that the engagement formation is locked by the opposed rails against lateral withdrawal from the formwork panel, the support bracket defining an aperture configured to receive the stake.

22. The concrete formwork system of claim 21, wherein the pair of opposed sidewalls define a void therebetween.

23. The concrete formwork system of claim 21, wherein the stake is threaded.

24. The concrete formwork system of claim 23, wherein the threaded stake has opposed faces and the support bracket includes rotationally spaced-apart engagement portions such that the stake is able to be freely slid through the support bracket and is lockable in the support bracket by rotation of the stake about its longitudinal axis relative to the support bracket.

25. The concrete formwork system of claim 21, wherein the support bracket terminates above a lower edge of the formwork panel when the engagement formation is locked by the opposed rails of the formwork panel.

26. The concrete formwork system of claim 21, wherein the formwork panel is formed as a unitary part.

27. The concrete formwork system of claim 21, wherein the support bracket is formed as a unitary part.

28. A concrete formwork system for forming adjacent concrete panels on a ground surface, said concrete formwork system comprising: a formwork panel including first and second longitudinally extending spaced-apart vertically opposed rails; and a support bracket including an engagement formation having a first edge, a second edge, a third edge, and a fourth edge, the engagement formation insertable between the first and second opposed rails such that the first edge is adjacent to the first rail and the second edge is adjacent to the second rail, and thereafter rotatable to a locked orientation relative to the first and second opposed rails wherein the third edge engages and is held by the first rail and wherein the fourth edge engages and is held by the second rail.

29. The concrete formwork system of claim 28, wherein the support bracket terminates above a lower edge of the formwork panel when the engagement formation is in the locked orientation relative to the opposed rails of the formwork panel.

30. The concrete formwork system of claim 28, wherein the first edge and the third edge extend at an obtuse angle relative to each other and wherein the second edge and the fourth edge extend at an obtuse angle relative to each other.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Preferred embodiments of the invention will be described, by way of non-limiting example only, with reference to the accompanying drawings in which:

[0062] FIG. 1 shows a top view of a dowel;

[0063] FIG. 2 shows a perspective view of the dowel;

[0064] FIG. 3 shows an opposite side perspective view of the dowel;

[0065] FIGS. 3a to 3c show top and perspective views of alternative dowels having a different shape;

[0066] FIG. 4 shows bottom detail of a corrosion-free plate dowel;

[0067] FIG. 5 shows a cross rib structure of the dowel in plan view;

[0068] FIG. 6 shows a sealing flange of the dowel when used to seal against a sideform;

[0069] FIG. 7 shows a side view of a clip-on cantilevered plate dowel sleeve;

[0070] FIG. 8 shows a perspective view of the sleeve;

[0071] FIG. 9 shows a side cutaway view of an articulating dowel system;

[0072] FIG. 10 shows a perspective view of the articulating dowel system;

[0073] FIG. 11 shows a side cross-sectional view of an articulating dowel system with 50 mm vertical lift;

[0074] FIG. 12 shows a cam component of the articulating dowel system;

[0075] FIG. 13 shows a perspective view of a multi-functional formwork panel;

[0076] FIG. 14 shows a cross-sectional view of the multi-functional formwork panel;

[0077] FIG. 15 shows two multi-functional formwork panels connected together;

[0078] FIG. 16 shows a multi-functional formwork panel having a capping installed thereon;

[0079] FIG. 17 shows joining of two multi-functional formwork panels;

[0080] FIG. 18 shows a Rip-A-Strip sealant well capping in place;

[0081] FIG. 19 shows the capping removed to form a well;

[0082] FIG. 20 shows the well filled with material;

[0083] FIG. 21 shows stretching of an arm of the capping;

[0084] FIG. 22 is a perspective view of a twist and lock stake bracket and stake;

[0085] FIG. 23 shows the bracket in an unlocked condition;

[0086] FIG. 24 shows the bracket in a locked condition;

[0087] FIG. 25 shows the bracket and stake in place on the multi-functional formwork panel;

[0088] FIG. 26 shows two joined formwork panels, each having a stake and bracket fitted thereto;

[0089] FIG. 27 shows detail of the multi-functional formwork panel having opposed rails down one side;

[0090] FIG. 28 shows detail of the bracket and its attachment to the opposed rails; and

[0091] FIGS. 29a to 29d show a clip-on foot for supporting the formwork panel.

DETAILED DESCRIPTION

[0092] With reference to FIGS. 1 to 6, there is shown a dowel 10 for controlling relative level between adjacent concrete panels, such that one concrete panel of a footpath or the like will stay level with a neighbouring concrete panel so as to maintain a level walking path and to avoid a tripping hazard. The dowel 10 is formed of corrosion-free material so as to avoid corrosion of the dowel 10.

[0093] The adjacent panels being kept level by the dowel 10 are formed of concrete, however it is possible that the dowel 10 and associated formwork system may be used for maintaining a level between panels cast from a different material. As shown in FIGS. 1 to 6, the dowel 10 is formed from material which is non-metallic and is preferably formed of a polymer material or other plastic material which is not prone to corrosion as are typical metal dowels. In one particular form, the dowel 10 may be formed of a metal material portion covered in a polymer material portion. In that case, the polymer material portion seals within itself the metal material portion in an air-tight seal so as to protect the metal material portion from corrosion from oxidation.

[0094] FIGS. 3a to 3c show top and perspective views of alternative dowels 10 having a different shape. Whereas the dowel 10 shown in FIGS. 1 to 3 is in the form of a six-sided shape (being rectangular at one side of the flange 18 and having a tapered portion at the other side of the flange), the dowels 10 shown in FIGS. 3a to 3c are four-sided. More specifically, the four-sided dowels 10 of FIGS. 3a to 3c have front and rear sides which are mutually parallel, as well as left and right sides which taper at the same angle on both sides of the flange 18.

[0095] As can be seen in FIGS. 4 and 5, the dowel 10 is substantially planar and is generally in the form of a plate. Opposed edges 12 of the dowel 10 are tapered inwardly toward a central axis of the dowel 10, the central axis lying within a plane of the dowel 10, the central axis lying along the central vertical rib shown in the orientation of FIG. 5. Tapering of the opposed edges 12 of the plate dowel 10 is configured to allow, in situ, lateral movement between the adjacent concrete panels when the panels contract during drying of the concrete. The dowel 10 may have a cross-ribbed structure on an upper surface and on a lower surface to increase structural rigidity.

[0096] As shown in FIG. 5, the dowel 10 may have rounded corners 14 which may be radiused. The dowel 10 may also have rounded edges 16 (see FIG. 4) which may be radiused.

[0097] The dowel 10 may have a flange 18 arranged to abut against a sideform 20 (see FIG. 6) through which the dowel 10 is inserted. The flange 18 extends in a plane perpendicular to the plane of the plate dowel 10. The flange 18 is adapted to seal against the sideform 20 so as to prevent ingress of concrete to a joint between adjacent concrete panels.

[0098] The dowel may be adapted for use in a non-industrial application and may be adapted for being cast into a concrete footpath so as to transfer load between adjacent concrete panels of the footpath.

[0099] Accordingly, there is disclosed a corrosion-free tapered plate dowel load transfer system. The tapered plate dowel provides lateral movement once the joint contracts. The double-sided cross-ribbed structure provides increased structural rigidity (providing increased bending strength) by breaking up un-reinforced horizontal surfaces. Corners and edges are radiused to prevent point loads giving even distributed forces at the dowel perimeter. The flange 18 on the dowel acts as a seal preventing concrete ingress into the joint. The flange 18 may optionally incorporate a rubber seal to facilitate the sealing effect.

[0100] With reference to FIG. 6, there is shown a concrete footpath formwork system 22 including a sideform 20 for forming adjacent concrete panels of a footpath and a dowel 10 adapted to extend through the sideform 20 for transferring load between the adjacent concrete panels, wherein the dowel is formed of corrosion-free material. The sideform 20 is formed as a unitary panel having one or more ribs 24 between opposed faces 26 to facilitate crushing of the sideform 20 in response to expansion of the concrete panels.

[0101] With reference to FIGS. 7 and 8, there is shown a sleeve 28 for a dowel 10, wherein the sleeve 28 is adapted to clip on to formwork through which the dowel 10 is inserted. With reference to FIG. 7, the sleeve 28 includes a flange 30 for abutting against the formwork 20, a sleeve portion 32 extending from the flange 30, an upper rib 34 supporting the sleeve portion 32 relative to the flange 30 and a lower rib 36 supporting the sleeve portion 32 relative to the flange 30. The flange 30 includes an upper flange portion 38 for engagement with an upper rail 40 of the formwork and a lower flange portion 42 having resilient clips 44 for clipping behind a lower rail 46 of the formwork.

[0102] The sleeve 28 may include surrounds around the resilient clips 44 preventing dislodgement of the upper flange portion 38 from the upper rail 40 of the formwork. The sleeve 28 may include crushable internal lateral movement voids 48 located at opposed sides of a cavity 50 for receiving the dowel 10. The sleeve 28 may include an expansion void and the sleeve portion 32 may include internal ribs 52 which provide interference on insertion of the dowel 10. The sleeve 28 includes centering ribs 54 which, when the sleeve 28 is clipped on to the formwork, protrude into a dowel slot of the formwork to prevent lateral misalignment of the sleeve 28 and the slot.

[0103] Accordingly, there is shown a concrete footpath formwork system 22 including a sideform 20 for forming adjacent concrete panels of a footpath, a dowel 10 adapted to extend through the sideform 20 for transferring load between the adjacent concrete panels, and a sleeve 28 for receiving the dowel 10, wherein the sleeve 28 is adapted to clip on to the sideform 20.

Features:

[0104] Fastener-less pivoting clip on function to extruded formwork.

[0105] Resists sleeve pull down by bracing itself above sleeve body with locked in cantilevered ribs.

[0106] Ribs below the sleeve brace sleeve in compression.

[0107] Surrounds around the clips prevent sleeve dislodgement from top pivoting point.

[0108] Incorporates 5 mm crushable internal lateral movement voids and a 10 mm expansion void.

[0109] Corners and edges are radiused to prevent point loads giving even distributed forces at the sleeve perimeter.

[0110] Internal ribs provide interference to the plate dowel upon insertion to prevent accidental pull-out during concrete pouring.

[0111] Centring ribs protrude into the slot on formwork preventing lateral misalignment of the sleeve with the slot.

[0112] With reference to FIGS. 9 to 12, there is also disclosed an articulating dowel system 56, including a dowel 58 and a dowel sleeve 60, wherein the dowel 58 includes a cam portion 62 located within the sleeve 60 to allow the dowel 58 to pivot relative to the dowel sleeve 60.

[0113] The cam portion 62 has a forward rounded part 64 (see FIG. 12) to facilitate pivoting of the dowel 58 relative to the dowel sleeve 60, and a rearward tapered part 66 extending rearwardly and tapering inwardly from the rounded part 64 to limit pivotal movement of the dowel 58 relative to the dowel sleeve 60. The rounded part 64 and the tapered part 66 define a pivot with upper and lower stops to allow limited upward and downward pivoting of the dowel 58 relative to the dowel sleeve 60. The dowel 58 may be formed from corrosion-free material such as, for example, polymer material. The sleeve 60 may be adapted to clip on to a sideform 20 for forming adjacent concrete panels 68. Accordingly, there is shown a concrete footpath formwork system including a sideform 20 for forming adjacent concrete panels 68 of a footpath, a dowel 58 adapted to extend through the sideform 20 for transferring load between the adjacent concrete panels 68, and a sleeve 60 for receiving the dowel 58, wherein the dowel 58 is arranged to pivot upwardly and/or downwardly relative to the sleeve 60. With reference to FIG. 10, the concrete footpath formwork system may include a seal 70 fitted to the sideform 20, the seal 70 having an aperture 72 through which a tongue 74 of the dowel 58 is inserted such that the seal 70 operates to seal between the dowel 58 and the sideform 20 against concrete ingress.

Features:

[0114] Corrosion-free articulating dowel system which allows for deflection control on light duty concrete pavements when joint articulates due to tree roots or reactive soil.

[0115] Allows up to 50 mm of simultaneous vertical lift on slabs while maintaining deflection control, load transfer, lateral dowel movement and expansion capabilities.

[0116] CAM component of dowel allows dowel rotation while carrying load horizontally across joint.

[0117] Fastener-less pivoting clip on function of system to extruded formwork.

[0118] Resists sleeve pull down by bracing itself above sleeve body with locked in cantilevered ribs.

[0119] Ribs below the sleeve brace sleeve in compression.

[0120] Surrounds around the clips prevent sleeve dislodgement from top pivoting point.

[0121] Incorporates 5 mm crushable internal lateral movement voids and a 10 mm expansion void.

[0122] Centring ribs protrude into the slot on formwork preventing lateral misalignment of the sleeve with the slot.

[0123] Dowel is kept horizontal during concrete pour by crushable positioning ribs located internally in the sleeve.

[0124] System is sealed off from concrete ingress with an additional seal.

[0125] With reference to FIGS. 13 to 17, there is shown a formwork panel 76 for forming adjacent concrete bodies, wherein the formwork panel 76 is adapted to be compressible on expansion of the concrete bodies. The concrete bodies may be in the form of adjacent concrete panels of a footpath or the like.

[0126] The formwork panel 76 may be substantially planar to be in a plane substantially perpendicular to a travel surface formed by upper surfaces of the concrete bodies. For example, as shown in FIG. 14, the concrete bodies 68 have upper surfaces 78 and the formwork panel 76 is substantially perpendicular to a travel surface (e.g. footpath) formed by the upper surfaces 78. The planar nature of the formwork panel 76 is in contrast to existing formwork which has a cross-sectional shape in the form of an inverted T.

[0127] The formwork panel 76 may be extruded with a constant cross-sectional shape along its length such that the formwork panel 76 is able to be cut to length so as to suit a particular application. The formwork panel 76 has at least one internal void 80 to facilitate sacrificial compression of the formwork panel 76 on expansion of the concrete bodies 68. The formwork panel 76 has a pair of opposed sideform walls 82 connected by at least one sacrificial rib 84 defining an internal void 80 between the opposed sideform walls 82. The formwork panel 76 has a pair of opposed rails 86 along at least one side of the formwork panel 76, the opposed rails 86 defining a channel for slideable mounting of an accessory to the formwork panel 76. The channel enables the formwork panel 76 to be connected to another like formwork panel 76 (see FIG. 17) by inserting one end of a joiner plate 88 in the channel of the formwork panel 76 and an opposite end of the joiner plate in the channel of the like formwork panel 76.

Features:

[0128] Compressible extruded sacrificial formwork panel and capping.

[0129] Crushable up to 10 mm to allow for thermal expansion at joint.

[0130] Multi-functional utility channel which allows for components to be attached continuously along the length.

[0131] Retains function as an expansion joint and functionally of components when cut.

[0132] Panels can be joined with joiner plate at any point when cut.

[0133] The formwork panel 76 may also have an upper capping 90, the capping 90 having side walls 92 and a top surface 94 arranged to be level with the upper surfaces 78 of the concrete bodies 68, as shown in FIG. 18. The capping 90 may be adhered to a top of the formwork panel 76 as shown in FIGS. 18 to 21, or may be resiliently clipped or slid on to a top portion of the formwork panel 76 as shown in FIGS. 16 and 17.

[0134] With reference to FIGS. 18 to 21 there is shown a formwork panel 76 for forming adjacent concrete bodies 68, the formwork panel having a formwork panel body 96 and a formwork panel capping 90 arranged to be selectively moved from a coupled condition (see FIG. 18) in which the formwork panel capping 90 is coupled to the formwork panel body 96 to form a surface level with upper surfaces 78 of the concrete bodies 68 and a decoupled condition (see FIG. 19) in which at least part of the formwork panel capping 90 is decoupled from the formwork panel body 96 so as to form a well 98 between the concrete bodies 68. The well 98 may have a predetermined depth being the height of the capping 90, less a thickness of a floor of the capping 90.

[0135] The formwork capping 90 may be formed with a frangible part 100 which is torn to move the formwork panel capping 90 from the coupled condition to the decoupled condition. The frangible part 100 may be located between an upper portion of the capping 90 and a lower portion of the capping 90 such that tearing the frangible part 100 separates the upper portion of the capping 90 from the lower portion of the capping 90. FIG. 18 shows the upper portion and lower portion of the capping 90 connected whereas FIG. 19 shows the upper portion removed from the lower portion. The capping 90 may include opposed arms 102 extending laterally outwardly from opposite sides of the capping 90 such that distal ends of the arms 102 are embedded in the concrete bodies 68. Each of the distal arms 102 may have an enlarged portion 104 to facilitate retainment in the concrete. The opposed arms 102 may extend outwardly from the lower portion of the capping 90, and the arms 102 may be able to be stretched to accommodate relative outward movement/retraction of the concrete bodies (see FIG. 21). Advantageously, by virtue of the opposed arms 102 being able to stretch in this way, they stretch with joint opening covering the gap preventing epoxies from running down the joint gap and acting as a debris and weed deterrent.

Features:

[0136] Flexible permanent/removable capping.

[0137] Option 1 to remain permanently with joint.

[0138] Option 2 to be ripped off joint (once poured) at tear points to allow scrabbling of joint and to create a welled rebate for use of joint sealants.

[0139] Wings on side anchor into concrete (either side).

[0140] Ribs stretch with joint opening covering the gap preventing epoxies from running down joint gap and act as a debris and weed deterrent.

[0141] Turning to FIGS. 22 to 28, there is shown a concrete footpath formwork system 22, including a formwork panel 76 for forming adjacent concrete panels of a footpath, and a support bracket 106 for supporting the system 22 relative to a ground surface. The formwork panel 76 has a pair of vertically opposed longitudinal rails 86, and the support bracket 106 has an engagement formation 108 which has an unlocked orientation (see FIG. 23) for inserting the formation 108 between the opposed rails to abut against the formwork panel 76 and a rotated, locked orientation (see FIG. 24) wherein the formation 108 is locked by the rails 86 against lateral withdrawal from the formwork panel 76.

[0142] The formation 108 is unlocked from the opposed rails 86 by rotation of the formation 108 about a lateral axis of the system from the locked orientation to the unlocked orientation.

[0143] The bracket 106 is supported relative to the ground surface by a stake 110 and the bracket 106 has an aperture 112 (see FIG. 28) for receiving the stake. The stake is threaded (see FIG. 22) and has opposed faces 114, the bracket 106 being formed with rotationally spaced engagement portions such that the stake 110 is able to be freely slid along its longitudinal axis through the bracket 106 and locked by rotating the stake 110 about its longitudinal axis relative to the bracket 106.

[0144] As can be seen in FIG. 28, the bracket 106 terminates at a lower end thereof above a lower edge of the formwork panel 76. The formwork panel 76 is formed as a unitary part and has a pair of opposed side walls 82 formed integrally with at least one rib 84, the opposed side walls 82 defining a void 80 therebetween. In the example shown in FIG. 27, the formwork panel 76 has six such ribs 84, comprising two external ribs and four internal ribs. The bracket 106 may itself be formed as a unitary part and may have a central rib 116 extending along the length of the bracket 106.

[0145] FIGS. 29a to 29d show a clip-on foot 120 for supporting the formwork panel 76. In particular, there is provided a clip-on foot 120 having a portion 122a and 122b for clipping on to a bottom tapered rail of the formwork panel 76. The portion for clipping on to the bottom tapered rail is formed of long upright support 122a and a short upright support 122b. The long upright support 122a has a strengthening brace 124 extending from the long upright support 122a downwardly and outwardly to be supported along a horizontal foot portion of the clip-on foot 120. The horizontal foot portion also has a pair of opposed notches 126 for soil nailing of the formwork profile using pins. Advantageously, the clip-on foot 120 enables the formwork profile to be freestanding, with multiple (for example three or four) clip-on feet to be fitted along a span of the formwork. The clip-on foot 120 enables the formwork to be moved to a final position, with the notches 126 being used for pinning the formwork panel 76 in position directly in the soil.

Features:

[0146] Formwork bracing and height adjustment system.

[0147] Attached to any point of the formwork panel utility channel with a twist and lock CAM base.

[0148] Inserted and turned 45 degrees to lock.

[0149] Fastener-less attachment process is quick and intuitive.

[0150] Central rib-based shape provides additional anchorage of the joint in one slab (pour through).

[0151] Removable and reusable before second pour (stop pour).

[0152] Twist and lock stake lock off.

System Features Overview:

[0153] Application: Concrete Pavements (Footpaths, Bikeways) for pedestrian and light vehicular traffic in urban residential areas, parklands, commercial (retail) public spaces and civil infrastructure.

[0154] The system has been designed to satisfy the requirements of Australian Standard: AS 3727.1:2016 Residential Pavements

[0155] A modular solution, with the capability to cast a range of slab thicknesses 75 mm, 100 mm, 125 mm & 150 mm. Modular sections are joinable to cast pavements up to (and greater than) 4 m in width.

[0156] A self-supporting design, that is economical to freight, and is easily assembled on site.

[0157] The solution must be non-corrosive for use in bayside applications or decorative pavement streetscapes.

[0158] Must provide for thermal expansion and contraction to a maximum joint gap thickness of 10 mm.

[0159] A joint system which minimises the impact of pavement slab heaving caused by (1) Tree Roots or (2) Reactive Soil.

[0160] A joint system that controls deflection under the conditions slab heaving caused by: (1) Tree Roots or (2) Reactive Soil

[0161] While various embodiments of the present invention have been described above, it should be understood that they have been presented by way of example only, and not by way of limitation. It will be apparent to a person skilled in the relevant art that various changes in form and detail can be made therein without departing from the spirit and scope of the invention. Thus, the present invention should not be limited by any of the above described exemplary embodiments.

[0162] The reference in this specification to any prior publication (or information derived from it), or to any matter which is known, is not, and should not be taken as an acknowledgment or admission or any form of suggestion that that prior publication (or information derived from it) or known matter forms part of the common general knowledge in the field of endeavour to which this specification relates.

[0163] Throughout this specification and the claims which follow, unless the context requires otherwise, the word “comprise”, and variations such as “comprises” and “comprising”, will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps.