EP3988738A1 - Anker - Google Patents

Anker Download PDF

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Publication number
EP3988738A1
EP3988738A1 EP21204443.2A EP21204443A EP3988738A1 EP 3988738 A1 EP3988738 A1 EP 3988738A1 EP 21204443 A EP21204443 A EP 21204443A EP 3988738 A1 EP3988738 A1 EP 3988738A1
Authority
EP
European Patent Office
Prior art keywords
anchor
flange
concrete body
leg
embedment
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.)
Pending
Application number
EP21204443.2A
Other languages
English (en)
French (fr)
Inventor
Ian Ross Ferrier
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.)
Illinois Tool Works Inc
Original Assignee
Illinois Tool Works Inc
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 AU2020903872A external-priority patent/AU2020903872A0/en
Priority claimed from AU2021254550A external-priority patent/AU2021254550A1/en
Application filed by Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Publication of EP3988738A1 publication Critical patent/EP3988738A1/de
Pending legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14—Conveying or assembling building elements
    • E04G21/142—Means in or on the elements for connecting same to handling apparatus

Definitions

  • the present invention relates to an anchor for concrete.
  • the applicant has identified that it would be beneficial to provide an anchor with improved strength and performance by way of varying anchorage teeth profiles along the anchor and/or by varying an I-beam centre web thickness.
  • Examples of the present invention seek to provide an improved anchor for concrete which obviates or at least ameliorates one or more disadvantages of existing anchors.
  • an anchor for embedment in a concrete body for lifting the concrete body
  • the anchor includes a head having an aperture for engagement with a lifting device, and a pair of legs adapted for embedment within the concrete body, wherein a flange is provided between the legs to increase strength of the anchor when shear loaded.
  • the flange extends at least partially around a throat of the anchor.
  • the flange extends along an inner periphery of the throat.
  • the throat is round. In one form, the throat is substantially horseshoe shaped.
  • the flange extends around an aperture for incorporating a tension bar.
  • the flange provides the anchor with a cross-section substantially in the manner of an I-Beam. More preferably, the flange provides the anchor with a cross-section substantially in the manner of an I-beam along a cross-section between the throat and an outside edge of each leg.
  • the flange runs only along a head side of the throat or the tension bar aperture.
  • the flange provides formation of an I-Beam section taken diagonally across a shoulder of the anchor, at an angle substantially mid-angle between a transverse axis of the anchor and a longitudinal axis of the anchor.
  • each leg has a plurality of anchorage formations along its length, and wherein a transverse dimension of the anchorage formations, in a direction transverse to a longitudinal direction of the respective leg, is varied between the formations.
  • an anchor for embedment in a concrete body for lifting the concrete body wherein the anchor includes a head having an aperture for engagement with a lifting device, and a pair of legs adapted for embedment within the concrete body, wherein a formation is provided to increase strength of the anchor when shear loaded, wherein the formation provides an I-Beam section taken diagonally across a shoulder of the anchor, at an angle substantially mid-angle between a transverse axis of the anchor and a longitudinal axis of the anchor.
  • the formation is in the form of a flange or rib.
  • an anchor for embedment in a concrete body for lifting the concrete body wherein the anchor includes a head having an aperture for engagement with a lifting device, and a pair of legs adapted for embedment within the concrete body, wherein each leg has a plurality of anchorage formations along its length, and wherein a transverse dimension of the anchorage formations, in a direction transverse to a longitudinal direction of the respective leg, is varied between the formations.
  • the anchorage formations are varied such that an anchorage formation closest to the head of the anchor has the greatest transverse dimension. More preferably, the anchorage formations are varied such that the transverse dimensions progressively reduce toward a distal end of the leg.
  • the anchorage formations are in the form of a series of spaced anchorage formations.
  • an anchor for embedment in a concrete body for lifting the concrete body wherein the anchor includes a head having an aperture for engagement with a lifting device, and a pair of legs adapted for embedment within the concrete body, wherein each leg has a plurality of anchorage formations along its length, and wherein a transverse dimension of the anchorage formations, in a direction transverse to a longitudinal direction of the respective leg and parallel to a plane of the anchor, is varied between the formations.
  • the anchorage formations are varied such that an anchorage formation closest to the head of the anchor has the greatest transverse dimension. More preferably, the anchorage formations are varied such that the transverse dimensions progressively reduce toward a distal end of the leg.
  • the anchorage formations are in the form of a series of spaced anchorage formations.
  • an anchor for embedment in a concrete body for lifting the concrete body wherein the anchor includes a head having an aperture for engagement with a lifting device, and a pair of legs adapted for embedment within the concrete body, wherein each leg has a plurality of anchorage formations along its length, and wherein a transverse dimension of the anchorage formations, in a direction transverse to a longitudinal direction of the respective leg and transverse to a plane of the anchor, is varied between the formations.
  • the anchorage formations are varied such that an anchorage formation closest to the head of the anchor has the greatest transverse dimension.
  • the anchorage formations are varied such that the transverse dimensions progressively reduce toward a distal end of the leg.
  • the anchorage formations are varied such that an anchorage formation closest to a distal end of the leg has the greatest transverse dimension.
  • the anchorage formations are varied such that the transverse dimensions progressively increase toward a distal end of the leg.
  • an anchor for embedment in a concrete body for lifting the concrete body wherein the anchor includes a head having an aperture for engagement with a lifting device, and a pair of legs adapted for embedment within the concrete body, wherein each leg has a central flange in a plane of the anchor, each leg has an outer rib extending along the leg and protruding in a direction transverse to the central flange, and wherein the central flange varies in thickness along its length.
  • the central flange is thickest close to the head. More preferably, the central flange is gradually thickened from a distal end of each leg toward the head.
  • each leg has a series of spaced anchorage formations along its length.
  • an anchor 10 for embedment in a concrete body for lifting the concrete body.
  • the anchor 10 includes a head 12 having an aperture 14 for engagement with a lifting device.
  • the anchor 10 also includes a pair of legs 16, 18 adapted for embedment within the concrete body during casting of the concrete body.
  • Each leg 16, 18 has a plurality of anchorage formations 20 along its length.
  • a transverse dimension of the anchorage formations 20, in a direction transverse to a longitudinal direction of the respective leg, is varied between the formations 20.
  • strength and performance of the anchor 10 may be optimised by varying the anchorage formations/teeth 20 profiles along the anchor 10 and/or by varying an I-beam centre web/flange 22 thickness of the anchor 10.
  • the anchorage formations 20 may be varied by varying the height of the anchorages as per the blue arrows. In one example, the anchorage formations may be taller close to the head 12 of the anchor 10. The applicant has also identified that the anchorage formations 20 may be varied by varying the width of the anchorages as per the red arrows. In one example, the anchorage formations 20 may be wider toward the head 12 or, alternatively, they may be wider toward distal ends of the legs 16, 18. The applicant has also identified that the thickness of the central web/flange 22 may be varied as per the orange arrows. In one example, the central web/flange 22 may be progressively thickened so as to be thickest close to the head 12.
  • a transverse dimension 24 of the anchorage formations in a direction transverse to a longitudinal direction of the respective leg 16, 18 and parallel to a plane of the anchor 10, is varied between the formations 20.
  • the anchorage formations 20 are varied such that an anchorage formation 20 closest to the head 12 of the anchor 10 has the greatest transverse dimension.
  • the anchorage formations 20 may be varied such that the transverse dimensions 24 progressively reduce toward a distal end of the respective leg 16, 18.
  • the anchorage formations 20 may be in the form of a series of spaced anchorage formations 20.
  • the anchorage formations 20 may be in the form of a series of repeated spaced anchorage formations 20, spaced at regular intervals along the lengths of the legs 16, 18.
  • a transverse dimension 26 of the anchorage formations 20, in a direction transverse to a longitudinal direction of the respective leg 16, 18 and transverse to a plane of the anchor 10, is varied between the formations 20.
  • the anchorage formations 20 are varied such that an anchorage formation 20 closest to the head 12 of the anchor 10 has the greatest transverse dimension 26. More preferably, the anchorage formations 20 are varied such that the transverse dimensions 26 progressively reduce toward a distal end of the respective leg 16, 18.
  • the anchorage formations 20 are varied such that an anchorage formation 20 closest to a distal end of the respective leg 16, 18 has the greatest transverse dimension 26.
  • the anchorage formations 20 are varied such that the transverse dimensions 26 progressively increase toward a distal end of the respective leg 16, 18.
  • the anchor 10 has a generally I-beam form in which the anchor 10 has a central web/flange 22, as well as ribs 28 extending along outside edges of the legs 16, 18.
  • Each leg 16 ,18 has the central flange 22 in a plane of the anchor 10, each leg 16, 18 having an outer peripheral rib 28 extending along the leg 16, 18 and protruding in a direction transverse to the central web/flange 22.
  • the central web/flange 22 may vary in thickness along the length of the legs 16, 18 as depicted by the orange arrows 30.
  • the central flange 22 is thickest close to the head 12 of the anchor 10. More preferably, the central flange 22 is gradually/progressively thickened from a distal end of each leg 16, 18 toward the head 12. With reference to Figures 5 to 7 , it can be seen that the central flange 22 is thickest close to the head 12 (as shown in figure 6 ) when compared to the thickness of the central flange 22 close to the distal end of the leg 16, 18 (as shown in Figure 7 ).
  • each leg 16, 18 has a series of spaced anchorage formations 20 along its length.
  • anchors 10 in accordance with other examples, similar to the example shown in Figures 1 to 9 , and like features are depicted with like reference numerals.
  • the main difference between the anchors 10 shown in Figures 10 to 36 when compared with the anchor 10 shown in Figures 1 to 9 is that the anchors shown in Figures 10 to 36 include a flange 32 provided between the legs 16, 18 to increase strength of the anchor 10 when shear loaded.
  • anchors 10 shown in Figures 10 to 36 have anchorage formations 20 having a different profile wherein the anchorage formations 20 are more square in that a central anchorage edge 34 is flatter (rather than rounded), the central anchorage edge 34 terminating at either end in a more pronounced anchorage corner 36 which flares outwardly into a larger rounded anchorage edge 38.
  • an anchor 10 for embedment in a concrete body for lifting the concrete body wherein the anchor 10 includes a head 12 having an aperture 14 for engagement with a lifting device, and a pair of legs 16, 18 adapted for embedment within the concrete body.
  • the flange 32 is provided between the legs 16, 18 to increase strength of the anchor 10 when shear loaded.
  • the flange 32 extends at least partially around a throat 40 of the anchor. More specifically, as can be seen in Figure 12 , the flange 32 extends along an inner periphery of the throat 40. It can also be seen in Figure 12 that the throat 40 is round and is substantially horseshoe shaped.
  • the flange 32 has a rounded central portion 42 terminating at either side in a linear portion 44 which extends diagonally at an angle to a longitudinal axis of the anchor 10.
  • the flange 32 extends around an aperture 46 for incorporating a tension bar.
  • the flange 32 provides the anchor 10 with a cross-section substantially in the manner of an I-Beam (see figures 16, 17 , 24, 25 , 32 and 33 ).
  • the flange 32 may provide the anchor 10 with a cross-section substantially in the manner of an I-beam along a cross-section between the throat 40 and an outside edge of each leg 16, 18.
  • the flange 32 may run only along a head side of the throat 40 or the tension bar aperture 46.
  • the flange 32 provides formation of an I-Beam section taken diagonally across a shoulder of the anchor 10, at an angle substantially mid-angle between a transverse axis of the anchor 10 and a longitudinal axis of the anchor 10 (that is, it may be at an angle of approximately 45° to both the transverse axis and the longitudinal axis of the anchor 10).
  • the flange 32 may at either end run directly into an uppermost one of the anchorage formations 20. More specifically, the flange 32 may at either end run directly into an inside peak (tip) of the uppermost anchorage formation 20.
  • Each leg has a plurality of anchorage formations 20 along its length.
  • a transverse dimension of the anchorage formations 20, in a direction transverse to a longitudinal direction of the respective leg 16, 18, may be varied between the formations 20.
  • the flange 32 is an example of a formation provided to increase strength of the anchor 10 when shear loaded. Accordingly, the formation provides an I-Beam section taken diagonally across a shoulder of the anchor 10, at an angle substantially mid-angle between the transverse axis of the anchor 10 and the longitudinal axis of the anchor 10.
  • the formation may, for example, be in the form of a flange 32 or rib.
  • Figures 10 to 36 show additional examples in which there is provided an inner flange 32 around the throat 40 (or tension bar aperture 46) of the anchor 10 to increase its strength when shear loaded.
  • Figures 10 to 17 show an anchor 10, in accordance with an example, in which there is provided a flange 32 along a periphery of a substantially horseshoe shaped throat 40 of the anchor 10.
  • Figures 18 to 25 show an anchor 10, in accordance with another example, in which there is provided a flange 32 in the form of an arch extending for a part 42 along a periphery of a substantially horseshoe shaped throat 40 of the anchor 10 and being angled in a linear portion 44 at either side toward an outer rib 28 of the respective anchor leg 16, 18.
  • Figures 26 to 33 show an anchor 10, in accordance with an example, in which there is provided an inner flange 32 around a periphery of a tension bar aperture 46 of the anchor 10.
  • Figures 34 to 36 also show the same anchor 10 as is shown in Figures 10 to 17 , having a flange 32 along a periphery of a substantially horseshoe shaped throat 40 of the anchor.
  • the function is to maximise the strength of the section (shown on the drawings by a sectional view on a diagonal), by making it like an I-Beam.
  • This zone of the anchor 10 is critical in reducing deflection of the anchor 10 under shear loading and hence increasing the shear load at which first cracks appear in the concrete panel when lifting in shear from the casting bed at minimal concrete compressive strength.
  • the concept is shown in the ideal state in Figures 10 to 17 and Figures 26 to 33 , however this concept also covers the arrangement where the flange 32 runs around only the head side of the throat 40 (or tension bar hole 46) or slot as shown by example in Figures 18 to 25 .
  • the flange or rib provides the formation of an I-Beam section through Section B-B shown in the drawings (which has the same I-beam cross section as the ideal states above.)
  • the inner flange 32 ideally would be narrower than the outer flange provided by ribs 28 but could be the same width as the other flange or be wider than the outer flange.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Joining Of Building Structures In Genera (AREA)
EP21204443.2A 2020-10-26 2021-10-25 Anker Pending EP3988738A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AU2020903872A AU2020903872A0 (en) 2020-10-26 Anchor
AU2020904691A AU2020904691A0 (en) 2020-12-16 Anchor
AU2021254550A AU2021254550A1 (en) 2020-10-26 2021-10-19 Anchor

Publications (1)

Publication Number Publication Date
EP3988738A1 true EP3988738A1 (de) 2022-04-27

Family

ID=78598737

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21204443.2A Pending EP3988738A1 (de) 2020-10-26 2021-10-25 Anker

Country Status (1)

Country Link
EP (1) EP3988738A1 (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013163395A1 (en) * 2012-04-26 2013-10-31 Illinois Tool Works Inc. Lifting anchors
AU2019279923A1 (en) * 2018-12-11 2020-06-25 Plastic Solutions Australia Pty Ltd Lifting anchor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013163395A1 (en) * 2012-04-26 2013-10-31 Illinois Tool Works Inc. Lifting anchors
AU2019279923A1 (en) * 2018-12-11 2020-06-25 Plastic Solutions Australia Pty Ltd Lifting anchor

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Inventor name: FERRIER, IAN ROSS