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WO2015081364A1 - Clef de serrage pour barres de renforcement - Google Patents

Clef de serrage pour barres de renforcement Download PDF

Info

Publication number
WO2015081364A1
WO2015081364A1 PCT/AU2013/001404 AU2013001404W WO2015081364A1 WO 2015081364 A1 WO2015081364 A1 WO 2015081364A1 AU 2013001404 W AU2013001404 W AU 2013001404W WO 2015081364 A1 WO2015081364 A1 WO 2015081364A1
Authority
WO
WIPO (PCT)
Prior art keywords
clip
coupling
termination
terminations
opening
Prior art date
Application number
PCT/AU2013/001404
Other languages
English (en)
Inventor
Tony MANDILE
Timothy COWDERY
Norbert Schauer
Original Assignee
Monkey Bar Couplers Pty Ltd
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
Application filed by Monkey Bar Couplers Pty Ltd filed Critical Monkey Bar Couplers Pty Ltd
Priority to PCT/AU2013/001404 priority Critical patent/WO2015081364A1/fr
Publication of WO2015081364A1 publication Critical patent/WO2015081364A1/fr

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
    • E04C5/162—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2/00—Friction-grip releasable fastenings
    • F16B2/20—Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening
    • F16B2/22—Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening of resilient material, e.g. rubbery material
    • F16B2/24—Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening of resilient material, e.g. rubbery material of metal
    • F16B2/241—Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening of resilient material, e.g. rubbery material of metal of sheet metal
    • F16B2/245—Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening of resilient material, e.g. rubbery material of metal of sheet metal external, i.e. with contracting action
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/04—Clamping or clipping connections
    • F16B7/0406—Clamping or clipping connections for rods or tubes being coaxial
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/22—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using hooks or like elements

Definitions

  • the present invention relates generally to reinforcing for concrete or other cementitious construction.
  • the invention is directed to a retaining clip for retaining the coupling of reinforcing bars for reinforcing concrete and is herein described in that context.
  • the invention has broader application and may be utilised in other coupling applications.
  • structures such as walls, floors, slabs and columns
  • reinforcing such as steel reinforcing bars
  • the bars are supported in desired positions and often there is a need to join length of bars to each other to ensure that the reinforcing not only is correctly positioned, but is able to transmit load across the coupling so that the bars can accommodate a large part or even their full axial capacity in either tension or compression.
  • wire ties or wraps have been secured around overlapping ends of adjacent bars to hold them relative to one another prior to the concrete pour.
  • Axial loads are transferred from one bar to the other overlapped bar through the concrete encasing the two joined bars.
  • This method uses more bar than necessary as the overlapped length of bar is only useful to effect the transfer of axial loads and these overlapping lengths can form a significant mass of reinforcing bar in a structure.
  • bars are formed with short externally threaded end portions and a sleeve with left handed and right handed internal thread portions is used to allow adj acent end of the bars to be connected to one another.
  • the properties of the coupling are at least the same as the major portion of the bars and that only limited longitudinal slip will occur when the coupling is loaded. If these properties are not within certain tolerances, then the coupling can significantly compromise the resulting structure. For example, if there is excessive longitudinal slip then this can cause excessive localised cracking thereby heightening the risk of corrosion, and may also cause excessive deflection. If the coupling is not as ductile as the main part of the bar, then this can cause localised stress concentration which potentially could result in catastrophic failure of the coupling.
  • a reinforcing bar which includes an enlarged termination integrally formed on the reinforcing bar shaft.
  • the termination is profiled to include locking formations that enable the termination to form part of an interlock and is disclosed as been made by deforming an end of the reinforcing bar.
  • a process of forming the reinforcing with the profiled termination is disclosed in International application WO 2006/084321, where the reinforcing bar end is subjected to various forging and milling stages. Whilst the reinforcing disclosed in these earlier applications performs well, alternative modes of retaining the terminations with respect to one another are desirable.
  • a retaining clip for a coupling comprising interlocked terminations of reinforcing bar shafts, the retaining clip comprising a body defining an opening configured to allow the clip to be laterally located about the coupling to retain the terminations with respect to one another.
  • a method of joining reinforcing bar shafts each shaft having a termination comprising positioning the terminations to form a coupling locating a clip comprising a body defining an opening over the coupling and inserting the coupling into the opening in a lateral direction.
  • a coupling assembly for a reinforcing bar comprising a termination having a body extending in a longitudinal direction between opposite first and second ends, and a lateral engagement face formed on the body, in use the first end is joined to an end of a reinforcing bar, and the engagement face incorporates locking formations thereon arranged to interfit with a complementary shaped termination to form an interlock arranged to accommodate loading applied in the longitudinal direction and a clip adapted to be located over the interlock, the clip comprising a body defining an interior cavity in which the interlock is located in use, the body being open at one side to allow the interlock to be positioned laterally within the clip.
  • the clip and termination configuration allows for the clip to be positioned over the coupling from more than one direction or orientation allowing for work in confined spaces. Further in some forms the clip has a low profile with respect to the terminations.
  • Fig. 1 is a perspective view of a coupling of one embodiment of the disclosure
  • Fig. 2 is a bottom view of the coupling of Fig. 1 ;
  • Fig. 3 is a top view of a coupling of one embodiment of the disclosure.
  • Fig. 4 is a side cross sectional view of the coupling of Fig. 1;
  • Fig. 5 is an end cross sectional of the coupling of Fig. 1 ;
  • Fig. 6 is an exploded view of the retaining clip of Fig. 3;
  • Fig. 7 is a cross- sectional view of a coupling of a second embodiment of the disclosure.
  • Fig. 8 is a perspective view of the coupling of Fig. 7;
  • Fig. 9 is a side view of the coupling of Fig. 7;
  • Fig. 10 is a bottom view of the coupling of Fig. 7;
  • Fig. 11 is a perspective view of a retaining clip of a third embodiment of the disclosure.
  • Fig. 12 is a top view of the clip of Fig. 11 ;
  • Fig. 13 is a detail of the clip of Fig. 12;
  • Fig. 14 is a side view of the clip of Fig. 11 ;
  • Fig. 15 is a bottom view of the clip of Fig. 11;
  • Fig 16 is a side view of the clip of Fig. 11;
  • Fig 17 is a cross sectional view of the clip of Fig. 1 1
  • Fig 18 is and end view of a clip of a fourth embodiment of the disclosure.
  • Fig 19 is a side view of the clip of Fig. 18
  • Fig 20 is a perspective view of the clip of Fig. 18;
  • Fig 21 is a bottom view of the clip of Fig. 18.
  • a retaining clip for a coupling comprising interlocked terminations of reinforcing bar shafts, the retaining clip comprising a body defining an interior cavity having an opening configured to allow the clip to be laterally located about the coupling to retain the terminations with respect to one another.
  • the clip is composed of a flexible material. In some forms the clip is configured in use to substantially align with the coupling when located over the coupling.
  • the clip comprises a u-shaped bracket having three walls defining the interior cavity and opening.
  • At least one of the walls extends to an end section and includes a lip positioned at the end section.
  • the lip is configured to define the opening.
  • the lip comprises a hook shaped end section.
  • the lip comprises a skirt shaped section.
  • a method of joining reinforcing bar shafts each shaft having a termination comprising positioning the terminations to form a coupling and locating a clip comprising a body defining an interior cavity having an opening over the coupling by inserting the coupling into the opening in a lateral direction.
  • the clip is composed of a flexible material and the coupling and clip are configured such that the width of the opening increases as the clip is moved into position over the coupling and decreases once the clip is in position over the coupling.
  • a termination assembly for a reinforcing bar having a body extending in a longitudinal direction between opposite first and second ends, and a lateral engagement face formed on the body, in use the first end is joined to an end of a reinforcing bar, and the engagement face incorporates locking formations thereon arranged to interfit with a complementary shaped termination to form an interlock arranged to accommodate loading applied in the longitudinal direction.
  • the termination assembly further comprises a second termination adapted to interfit with the first termination.
  • a coupling 2 which is formed from
  • the coupling 2 is formed by interconnecting the terminations 1 to form an interlock 6 with the projections 7 of one termination 1 interfitting within corresponding recesses 8 ofjthe other termination.
  • the interlock 6 extends along an axis which, in the illustrated form, is coaxial with the central axis of the respective reinforcing bar shafts 3.
  • the coupling 2 also includes a retaining device 10 which is arranged to prevent separation of the terminations 1.
  • the retaining device 10 is in the form of a clip 1 1.
  • the clip is typically a metal clip, though alternative materials may be used.
  • the clip 1 1 in the illustrated form comprises a bracket shaped body 15 having a substantially U-shaped configuration formed by walls in the form of a web 12 extending between two flanges 13.
  • the body 15 defines an interior cavity which in the illustrated form is substantially square in cross section.
  • the clip 1 1 is adapted to be laterally positioned on the coupling 2 such that the coupling is positioned in the interior cavity.
  • the clip 1 1 comprises three sides and when in position on the coupling has a low profile with respect to the coupling.
  • An opening 18 is located between the flanges 13 and defined by the flanges. The opening 18 allows the coupling 2 to be laterally inserted into the clip 1 1
  • the coupling 2 has a regular cross section and, in the illustrated form, the cross section of the coupling 2 is substantially square when the terminations 1 are located and interlocked with respect to one another. This allows for the clip 1 1 to be fitted onto the coupling from top, bottom or sides of the coupling 2 which is of benefit in
  • the retainer 10 in the form of a clip 1 1 comprises a body 15 having a generally U-shaped or bracket shaped cross-section.
  • the body 15 comprises a web 12 extending between two flanges 13.
  • the web 12 includes a distended section 14 forming a convex outwardly positioned projection.
  • the web further includes ribs 25 extending from the distended section 14.
  • the web 12 is turned through 90 degrees or greater than to meet the flanges 13 at rounded corners 16.
  • the flanges 13 extend from the web 12 to an end section 17 which is turned in with respect to the flanges 13.
  • the end section 17 curves inwardly and is rolled about itself to define the narrowest point of opening 18.
  • the end sections 17 extend from each flange and in use act to retain the clip 1 1 in position over the coupling 2.
  • the flange further includes ribs 25 extending from the web 12 to the end section 17.
  • the clip 1 1 is composed of metal or an alternative flexible but strong material.
  • the clip 1 1 is formed of a flexible material such that the flanges 13 of the clip 1 1 are moveable away from one another but are biased toward one another. As such the clip is sprung to allow for a slight widening of the opening 18 to allow a coupling to be inserted therein and to allow the clip to revert to shape around the coupling upon insertion.
  • the clip 1 1 is configured to be positioned over a coupling 2 such as that seen in
  • the coupling comprises two terminations 1 in an interlocking relationship to form the coupling 2.
  • the clip 1 1 is positioned over the coupling 2 by pressing the coupling through the opening 18 in the clip.
  • the flanges 13 which define the opening 18 are biased together but moveable outwardly to allow the coupling to be fitted into the space between the flanges 13 and the web 12 and held therein.
  • the opening 18 and clip 1 1 are configured such that the clip can be fitted laterally from any side of the coupling 2. This allows for fitting the clip to the coupling in locations or orientations that are difficult to access. As best shown in Fig. 6, the clip can be positioned over the coupling from either the side at which the terminations meet or a side at which there is just the rear face of a single termination.
  • the shape of the coupling, 2, which in some forms has a substantially regular or square cross section allows for the clip 1 1 to be positioned from various angles.
  • the end sections 17 of the clip 1 1 retain the clip in position with respect to the coupling.
  • the clip 1 1 comprises a body 15 having a generally U-shaped cross-section.
  • the body 15 comprises a lower web 12 extending between two flanges 13.
  • the web 12 includes a distended section 14 forming a convex outwardly positioned section. In the illustrated form the web 12 is turned through greater than 90 degrees to meet the flanges 13 at rounded corners 16.
  • the flanges extend substantially perpendicularly to the web to meet end sections 17 of the flanges 13.
  • the end sections 17 include a hook 29 which is turned about creating a cane shape for the flange 13.
  • the hook is oriented such that the opening 18 in the clip 1 1 is narrower than the widest part of the cavity defined by the clip 1 1 and narrower than the width of the web 12.
  • a clip 1 1 having a generally U-shaped profile which is configured to fit around a coupling between reinforcing bars.
  • the clip 1 1 extends about three sides of an internal cavity 31 configured to retain the coupling.
  • An opening 18 in the clip is configured to allow the coupling to be laterally inserted therein.
  • the opening is narrower than the cross sectional width of the internal cavity 31 such that a coupling inserted into the cavity 31 is retained therein.
  • the clip 1 1 comprises a ridged wall 33 extending about three sides of the cavity 31 and terminating at each end in a hooked portion 34 which curves inwardly with respect to the walls and is oriented to project across the opening 18 to retain the coupling within the cavity.
  • the walls 33 comprise ridges 36 extending from a depression 35 in the wall.
  • the depression projects outwardly from the internal cavity 31 and runs across one wall of the clip 1 1.
  • the ridges 36 extend to a position proximal the end hooked portions 34 of the walls.
  • the ridges extend outwardly of the clip 1 1.
  • the hooked portions 34 include a cut out portion 37 which is positioned centrally in the hooked portions 37.
  • the walls 33 further include an indentation 39 projecting outwardly from the cut out portion 37.
  • the clip 1 1 is configured to be positioned over a coupling 2 such as that seen in Figs. 1 and 2.
  • the coupling comprises two terminations 1 in an interlocking relationship to form the coupling 2.
  • the clip 1 1 is positioned over the coupling 2 by pressing the coupling through the opening 18 in the clip.
  • the flanges 13 which define the opening 18 are biased together but moveable outwardly to allow the coupling to be fitted into the space between the flanges 13 and the web 12 and held therein.
  • the opening 18 and clip 1 1 are configured such that the clip can be fitted laterally from any side of the coupling 2. This allows for fitting the clip to the coupling in locations or orientations that are difficult to access.
  • the shape of the coupling, 2, which in some forms has a substantially regular or square cross section allows for the clip 1 1 to be positioned from various angles.
  • the indentations 20 on the lip 19 of the flanges 13 are configured to be seated in a recess 24 in the coupling to allow for greater retention of the clip 1 1 with respect to the coupling.
  • the hooked portions 34 are adapted to be seated in an indentation in the coupling or to hook over a lip on the coupling.
  • the flanges 13 extend from the web 12 and are angled generally toward one another to form the sides of the substantially U shaped cross section.
  • the end sections 17 of the flanges 13 define an opening 18 in the clip 1 1.
  • the opening 18 has a width less than the width of the web 12.
  • the end sections 17 of the flanges 13 include a lip 19 which incorporates an indentation 20 to define the narrowest point of the opening 18.
  • the lip 19 extends through the indentation 20 to a projection 21 at the distal end of the flanges 13.
  • the reinforcing bar shafts are arranged to be embedded in concrete so as to accommodate load induced in the resulting structure.
  • the first is axial loading which extends primarily in the direction of the bars axis CL. This axial loading may be in tension or in compression.
  • the other loading condition is shear where the loading is in a direction normal to the centreline CL.
  • the coupling 2 is arranged to accommodate loading in both these conditions.
  • the retaining device 10 in the form of the clip 11 is adapted to hold the terminations 1 of the coupling 2 in position with respect to one another.
  • the reinforcing bars shafts may be biased apart (under tension) or biased together, with tensile loading being the predominant condition.
  • This axial loading is accommodated by the coupling 2 through interengagement of projections 28 on correlating profiled surfaces 29 of the two terminations 1.
  • the projections 28 are arranged to engage along their bearing surfaces 31 formed in the side walls 32 of the profiled surface. These form the regions of contact of the projections 28 under axial loading.
  • the retaining device 10 in the clip 11 is sufficient to accommodate the design shear loading.
  • the reinforcing bar shafts can simply be connected to the adjacent reinforcing bar shafts by forming an interlock through interconnection of the termination 1 with a correlating termination on an adjacent shaft.
  • the clip 11 is then laterally positioned over the interlocks or coupling to retain the terminations 1 in engagement with one another.
  • the concrete can then be poured.
  • the low profile of the clip 11 with respect to the coupling 2 through the correlation between the shape of the clip 11 and the cross section of the coupling 2 allows for the concrete to easily move between the coupling and the reinforcing and fosters an effective bind between the concrete and the reinforcing.
  • An advantage of the coupling and retaining device is that it is easy to assemble onsite and easy to ascertain onsite whether the coupling has been properly installed. If the terminations have not been properly connected together, then it may not be possible to locate the retaining device over the coupled terminations and/or it is clearly visible as part of a termination projects beyond the sleeve length.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)

Abstract

On décrit une clef de serrage pour accouplement, qui comprend des extrémités verrouillées de tiges de barres de renforcement, ladite clef de serrage comprenant un corps qui délimite une ouverture conçue pour permettre à la clef de serrage de se verrouiller latéralement autour de l'accouplement pour retenir les extrémités l'une par rapport à l'autre.
PCT/AU2013/001404 2013-12-03 2013-12-03 Clef de serrage pour barres de renforcement WO2015081364A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/AU2013/001404 WO2015081364A1 (fr) 2013-12-03 2013-12-03 Clef de serrage pour barres de renforcement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/AU2013/001404 WO2015081364A1 (fr) 2013-12-03 2013-12-03 Clef de serrage pour barres de renforcement

Publications (1)

Publication Number Publication Date
WO2015081364A1 true WO2015081364A1 (fr) 2015-06-11

Family

ID=53272628

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2013/001404 WO2015081364A1 (fr) 2013-12-03 2013-12-03 Clef de serrage pour barres de renforcement

Country Status (1)

Country Link
WO (1) WO2015081364A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2369450A1 (fr) * 1976-10-26 1978-05-26 Knorr Bremse Gmbh Dispositif d'accouplement pour relier des tiges ou des cables
JP2005299212A (ja) * 2004-04-12 2005-10-27 Rs:Kk 鉄筋用スペーサー

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2369450A1 (fr) * 1976-10-26 1978-05-26 Knorr Bremse Gmbh Dispositif d'accouplement pour relier des tiges ou des cables
JP2005299212A (ja) * 2004-04-12 2005-10-27 Rs:Kk 鉄筋用スペーサー

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