WO2014117214A1 - Structure à barres d'armature et procédé de production - Google Patents

Structure à barres d'armature et procédé de production Download PDF

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Publication number
WO2014117214A1
WO2014117214A1 PCT/AU2014/000056 AU2014000056W WO2014117214A1 WO 2014117214 A1 WO2014117214 A1 WO 2014117214A1 AU 2014000056 W AU2014000056 W AU 2014000056W WO 2014117214 A1 WO2014117214 A1 WO 2014117214A1
Authority
WO
WIPO (PCT)
Prior art keywords
strap
bar
reinforcement
bars
mesh
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/AU2014/000056
Other languages
English (en)
Inventor
Leonard Francis Beyers
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2013900326A external-priority patent/AU2013900326A0/en
Application filed by Individual filed Critical Individual
Publication of WO2014117214A1 publication Critical patent/WO2014117214A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/20—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups of material other than metal or with only additional metal parts, e.g. concrete or plastics spacers with metal binding wires
    • E04C5/205—Ladder or strip spacers
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance, i.e. of essentially one-dimensional [1D] or two-dimensional [2D] extent
    • E04C5/04—Mats
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/162—Connectors or means for connecting parts for reinforcements
    • E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction

Definitions

  • This invention relates generally to reinforcement bar (rebar) mesh, and especially, but not exclusively, to rebar mesh of a kind that can be folded up into rolls that are subsequently rolled out in the formation of reinforcement mesh for concrete slab, e.g. a concrete slab or roadbed.
  • rebar reinforcement bar
  • One type of reinforcement bar mesh has multiple spaced reinforcement bars (rebars), linked by substantially parallel steel straps that extend generally normal to the bars.
  • the straps are sufficiently flexible or bendable for the mesh to be rolled up into rolls for storage and transport. These rolls are particularly effective for assembling and delivering reinforcement mesh into concrete roadbeds, for example by mobile workstations such as that described in the present applicant's international patent publication WO 2005/042849.
  • the mobile workstation described therein includes a rear sloping apron along which reinforcing mesh is delivered to a roadbed as the workstation moves or is drawn slowly forward.
  • a roll of transverse reinforcing rods is unrolled to form a series of spaced apart reinforcement rods in contact with longitudinally extending rods that are either delivered by guides onto the apron or themselves rolled out from rolls positioned along an edge of the apron.
  • the respective rods are tack welded at selected intersections to form an orthogonal reinforcement mesh that is delivered in turn to the roadbed. It is more common in practice to tie the rods together at selected intersections rather than to use tack welding.
  • the invention provides a reinforcement bar mesh comprising multiple spaced reinforcement bars linked by one or more substantially parallel metal, preferably steel, straps that extend generally normal to the bars, wherein each bar is secured to the or each strap without welds to the bar by being firmly held between the respective strap and an overlying metal, preferably steel, strap portion that is fixed to the strap on opposite sides of the bar.
  • the invention provides a method of producing a reinforcement bar mesh comprising multiple spaced reinforcement bars linked by substantially parallel metal, preferably steel, straps that extend generally normal to the bars, comprising: relatively laying each reinforcement bar in turn across one or more steel straps at a fixing station; where each bar intersects a strap, placing a metal strap portion substantially parallel to the or each strap and over the reinforcing bar and the strap to either side of the reinforcing bar; and fixing the strap portion and strap together on both sides of the bar whereby the bar is firmly held between the respective strap and the strap portion.
  • the invention provides a reinforcement bar mesh comprising multiple spaced reinforcement bars linked by one or more substantially parallel metal straps that extend generally normal to the bars, wherein each bar is secured to the or each strap without welds to the bar by a swage and rivet arrangement.
  • the strap and the strap portion are both deformed, e.g. substantially relatively symmetrically, to curve around the bar.
  • the interface plane of the strap and strap portion may contain the axis of the bar.
  • said deformation is effected by swaging the strap and strap portion about the reinforcement bar, while simultaneously effecting said fixing by forming indentations that rivet the strap and strap portion together.
  • the strap portion is a second strap, and both straps are delivered, from one or more stored sources, about the reinforcement bar at the fixing station.
  • the mesh is delivered in a direction parallel to the axis of the straps and folded into a roll for storage and transport.
  • the straps are sufficiently flexible, or at least bendable, to permit such rolling up.
  • Figure 1 depicts a segment of partly rolled up reinforcement bar mesh according to an embodiment of the invention, suitable for unrolling onto an apron for assembly of orthogonal rebar mesh;
  • Figure 2 is a fragmentary perspective view of a representative intersection between reinforcement bar and straps
  • Figure 3 is a fragmentary cross-section on the line A-A in Figure 2;
  • Figure 4 shows the two halves of a suitable tool for swaging the straps onto a reinforcement bar and riveting straps together on either side of the bar.
  • the reinforcement bar mesh 10 shown in Figure 1 includes a series of spaced parallel lengths 12 of standard reinforcement bar (e.g. 16mm diameter) linked by respective pairs 20 of juxtaposed metal, preferably steel, straps 22, 23.
  • Each reinforcement bar 12 has a non-smooth surface profile with spiral rib elements 13 typical of such bars and in this case is cylindrical.
  • Each of straps 22, 23 is a 19 x 0.5mm band of high tensile steel.
  • the bars are typically at 120mm centre-to-centre spacing, though this will of course vary according to the specifications for their use, along with the dimensional and material parameters of both the straps and the bars. As illustrated, there are two pairs of straps 22, 23, but in other embodiments there may be only one, or three or more pairs of straps.
  • the steel straps are correspondingly and relatively symmetrically deformed, around and to opposites sides of the bar at each intersection, so that the interface plane between the straps contains the axis of the bar. Moreover, the straps are riveted together at opposite side of the bar so as to lock in the deformation of each strap and so that the bar is firmly held between the straps.
  • This form of fixture between the straps and bars is achieved by swaging with a hydraulic press tool that simultaneously forms the rivet indentations.
  • a suitable two part tool 40 for this purpose is depicted in Figure 4.
  • the bottom part 48 of the tool receives the lower strap from a supply reel, along a guideway defined by four posts 42.
  • An elongate depression or channel 44 of symmetrical arcuate cross section is formed in the tool face and extends transversely to the strap axis, midway between posts 42.
  • Each reinforcing bar is successively laid in turn centrally of this depression, e.g. by being delivered from above or directed in along its axis.
  • the second strap 23 is then laid between the posts and the other matching part 50 of the tool (with a corresponding channel 45 and blind holes 43 to receive posts 42) closed down in a manner such that the tool swages the straps on to the tool by deforming them into the respective channels or depressions 44, 45.
  • respective protrusions 46 on the upper tool part 50 cooperate in recesses 47 on lower tool part 48 to punch into the juxtaposed straps to either side of the bar so as to form complementary cold worked indentations 60, 61 by which the two straps 22, 23 are riveted together.
  • only one of the straps is continuous bar-to-bar, while in place of the other strap there is a discrete strap portion at each bar.
  • multiple strap portions are provided by a single continuous strap 22 or 23.
  • the illustrated mesh is delivered continuously in the direction aligned with straps 22, 23.
  • the thus formed mesh may then be rolled up to form substantial rolls (as depicted in Figure 1 at 100) for storage and transport.
  • sets of the rolls may be unrolled in two orthogonal directions, directly onto a concrete pour site or onto an intermediate assembly apron, to form an orthogonal assembly of rebars that are tied together at a selected proportion of the bar intersections.
  • the apron may be on a mobile workstation such as that described in the aforementioned international patent publication WO 2005/042849, in which case the formed reinforcing bar mesh, or matt, is continuously laid rearwardly onto a roadbed as the mobile workstation moves or is drawn slowly forward.
  • the reinforcement bar mesh is formed on site in a construction zone in a process in which straps and bars are continuously delivered to a fixing station and the formed mesh is continuously relatively fed out onto a bed on which wet concrete is subsequently poured.
  • the bed may be a roadbed, and the fixing station may be mobile and moved steadily forward at a rate to match the rate of formation of the mesh.
  • the illustrated embodiment of mesh construction and construction method provides, in a straightforward manner, a Tollable reinforcement bar mesh or mat that is free of welds and is therefore acceptable in markets where welded roll-up mats are not welcome.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Wire Processing (AREA)
  • Reinforcement Elements For Buildings (AREA)

Abstract

La présente invention concerne une structure à barres d'armature comportant une pluralité de barres d'armature (12) reliées par un feuillard métallique (22)ou des feuillard(s) métallique(s) sensiblement parallèles (22) qui s'étendent généralement perpendiculairement aux barres. Chaque barre (12) est fixée solidement au ou à chaque feuillard métallique (22) sans soudures à la barre en étant fermement maintenue entre le feuillard métallique respectif et une partie d'attache métallique sus-jacente (23) qui est fixée au feuillard sur les côtés opposés de la barre. L'invention concerne également un procédé de production de ladite structure.
PCT/AU2014/000056 2013-02-01 2014-01-29 Structure à barres d'armature et procédé de production Ceased WO2014117214A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2013900326 2013-02-01
AU2013900326A AU2013900326A0 (en) 2013-02-01 Rebar mesh and method of production

Publications (1)

Publication Number Publication Date
WO2014117214A1 true WO2014117214A1 (fr) 2014-08-07

Family

ID=51261312

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2014/000056 Ceased WO2014117214A1 (fr) 2013-02-01 2014-01-29 Structure à barres d'armature et procédé de production

Country Status (1)

Country Link
WO (1) WO2014117214A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106592873A (zh) * 2016-12-15 2017-04-26 青岛森林金属制品有限公司 钢筋网片制作装置、钢筋网片组及其制作方法
CN109577556A (zh) * 2018-11-28 2019-04-05 建科机械（天津）股份有限公司 一种能够卷曲的钢筋网及钢筋网板
CN109707105A (zh) * 2018-11-28 2019-05-03 建科机械（天津）股份有限公司 一种钢筋编织网及钢筋编织网片
JP2020159022A (ja) * 2019-03-26 2020-10-01 センクシア株式会社 鉄筋結束具
US20210121938A1 (en) * 2019-10-25 2021-04-29 Structa Wire Ulc Lath with flattened tabs
CN113719133A (zh) * 2021-08-06 2021-11-30 中国一冶集团有限公司 一种钢筋铺设装置及其使用方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1300079A (en) * 1968-12-23 1972-12-20 Hans Haller An improved reinforcement for concrete
WO1998002615A1 (fr) * 1996-07-11 1998-01-22 Leonard Francis Beyers Poste de travail mobile pour assembler et poser des barres d'armature
AU9705198A (en) * 1997-12-12 1999-07-01 Onesteel Reinforcing Pty Limited Reinforcing elements
WO2004009266A1 (fr) * 2002-07-23 2004-01-29 Stema Engineering A/S Procede et appareil de fabrication de treillis de tiges d'armature de beton

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1300079A (en) * 1968-12-23 1972-12-20 Hans Haller An improved reinforcement for concrete
WO1998002615A1 (fr) * 1996-07-11 1998-01-22 Leonard Francis Beyers Poste de travail mobile pour assembler et poser des barres d'armature
AU9705198A (en) * 1997-12-12 1999-07-01 Onesteel Reinforcing Pty Limited Reinforcing elements
WO2004009266A1 (fr) * 2002-07-23 2004-01-29 Stema Engineering A/S Procede et appareil de fabrication de treillis de tiges d'armature de beton

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106592873A (zh) * 2016-12-15 2017-04-26 青岛森林金属制品有限公司 钢筋网片制作装置、钢筋网片组及其制作方法
CN109577556A (zh) * 2018-11-28 2019-04-05 建科机械（天津）股份有限公司 一种能够卷曲的钢筋网及钢筋网板
CN109707105A (zh) * 2018-11-28 2019-05-03 建科机械（天津）股份有限公司 一种钢筋编织网及钢筋编织网片
JP2020159022A (ja) * 2019-03-26 2020-10-01 センクシア株式会社 鉄筋結束具
US20210121938A1 (en) * 2019-10-25 2021-04-29 Structa Wire Ulc Lath with flattened tabs
US11578490B2 (en) * 2019-10-25 2023-02-14 Structa Wire Ulc Lath with flattened tabs
CN113719133A (zh) * 2021-08-06 2021-11-30 中国一冶集团有限公司 一种钢筋铺设装置及其使用方法

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