EP2504504A1 - A collar for a concrete lifting anchor - Google Patents
A collar for a concrete lifting anchorInfo
- Publication number
- EP2504504A1 EP2504504A1 EP09829877A EP09829877A EP2504504A1 EP 2504504 A1 EP2504504 A1 EP 2504504A1 EP 09829877 A EP09829877 A EP 09829877A EP 09829877 A EP09829877 A EP 09829877A EP 2504504 A1 EP2504504 A1 EP 2504504A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- collar
- anchor
- clutch
- head portion
- concrete component
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/62—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled
- B66C1/66—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled for engaging holes, recesses, or abutments on articles specially provided for facilitating handling thereof
- B66C1/666—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled for engaging holes, recesses, or abutments on articles specially provided for facilitating handling thereof for connection to anchor inserts embedded in concrete structures
-
- 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
- This invention relates to a collar for a concrete panel lifting anchor and, more particularly but not exclusively, to a concrete panel lifting anchor formed of bent wire having a collar to provide clutch abutment surfaces.
- a typical anchor of this kind is formed from metal by cutting the anchor from a plate, and is cut so as to provide clutch abutment shoulders to limit rotation of a lifting clutch relative to the anchor.
- typical anchors are relatively expensive to produce due to the cutting procedure, and that use of such typical anchors may be restrictive as the anchor must be located at or near a central plane of the panel. Lifting anchors fabricated by cutting plate material require a lot of energy to produce, and often have irregularities.
- Examples of the invention seek to solve, or at least ameliorate, one or more disadvantages of previous lifting anchors.
- a collar for an anchor for use in lifting a concrete component said anchor comprising a head portion engagable with a clutch of a lifting system, and a body portion for embedment with the concrete component, the collar including an attachment portion for attaching the collar to the head portion of the anchor, and an abutment portion adapted to provide a clutch abutment surface for limiting rotation of the clutch relative to the anchor.
- the abutment portion forms the clutch abutment surface as a shoulder adjacent the lifting anchor. More preferably, the clutch abutment surface is formed as a shoulder adjacent the head portion for limiting rotation of the clutch about an eye of the head portion. More preferably still, the abutment portion provides a shoulder adjacent each side of the head portion for limiting rotation of the clutch about the eye in both directions of rotation.
- the collar may include a gap between the shoulders which coincides with the eye of the head portion to allow passage of the clutch through the eye.
- the abutment portion is formed by an edge of the collar.
- the collar fits around the head portion, and is held to the head portion by way of a press fit.
- the collar is generally C-shaped.
- the collar includes at least one shear bar attached to the collar. More preferably, the shear bar engages in a groove of the collar. Preferably, the shear bar is welded to the collar. In one example, the shear bar is formed in a generally wave-like shape, with oscillations in a direction generally perpendicular to a central axis of the anchor when the collar is fitted to the anchor. More preferably, the collar includes a second shear bar, wherein a major axis of the second shear bar is generally parallel to a major axis of the first shear bar and is substantially a mirror image of the first shear bar when viewed from an end of the anchor.
- an anchor for use in lifting a concrete component, said anchor comprising a single length of wire bent to form a head portion engagable with a clutch of a lifting system, and a body portion for embedment with the concrete component, wherein the anchor has a collar to provide clutch abutment surfaces for limiting rotation of the clutch relative to the anchor, the collar being a collar as described above.
- Figure 1 is a perspective view of a lifting anchor having a collar in accordance with an example of the present invention
- Figure 2 is a perspective view of the anchor of Figure 1 , shown with an associated chair;
- Figure 3 is a perspective view of the anchor, shown with the chair fitted thereto;
- Figure 4 is a side view of the anchor, with the chair fitted thereto;
- Figure 5 is a top view of the anchor, with the chair fitted thereto;
- Figure 6 is a perspective view of the chair shown in isolation, in a deconstructed condition.
- Figure 7 is a perspective view of an edge of a concrete component with the anchor embedded therein.
- an anchor 10 for use in lifting a concrete component 12 (Fig, 7).
- the anchor 10 shown is in the form of an edge lift anchor, however it will be appreciated by those skilled in the art that alternative examples of the present invention may be in the form of other types of anchors such as, for example, a face lift anchor.
- the anchor 10 comprises a single length of wire 14 bent to form a head portion 16 engagable with a clutch of a lifting system, and a body portion 18 for embedment with the concrete component 12.
- the wire 14 is bent such that opposed legs 20, 22 of the body portion 18 extend in a plane substantially perpendicular to a plane of the head portion 16.
- the anchor 10 is able to be arranged such that the opposed legs 20, 22 lie in a plane substantially parallel to a central plane of the concrete component 12, while the head portion 16 is oriented substantially perpendicularly to the central plane of the concrete component 12.
- this enables the anchor 10 to be located lower in the concrete component 12 to facilitate edge lifting of the concrete component 12, while facilitating a broad spread of the opposed legs 20, 22 within the concrete component 12.
- each of the legs 20, 22 may be formed with a wave-like configuration by incorporating a series of ripples to provide additional anchorage of the anchor 10 within the concrete component 12.
- the ripples inhibit withdrawal of the legs 20, 22 from the concrete, by applying compression to the concrete during lifting.
- the opposed legs 20, 22 are able to provide the same function as ancillary tension bars which have been used in existing lifting anchors.
- the head portion 16 in the example shown is twisted through an angle of 270 degrees relative to the body portion 18 about the central axis 24 of the anchor 10.
- the head portion may be twisted through an angle of 90 degrees (or, more generally, an angle of 90 + 18Ox, where x is a non-negative integer) relative to the body portion 18 about the central axis 24 of the anchor 10.
- the central axis 24 is in the plane of the head portion 16. In this way, the plane of the head portion 16 is perpendicular to the plane of the body portion 18.
- the body portion 18 may be rotated about the central axis 24 relative to the head portion 16 such that the plane of the body portion 18 is out of the plane of the head portion 16 by an angle other than 90 degrees.
- this angle may be approximately 60, 45, 30 or 15 degrees, as may be appropriate depending on the shape and/or orientation of the concrete component 12.
- the anchor 10 may be used for lifting concrete panels with varying edge profile angles by, prior to embedment of the anchor 10 within the concrete panel, bending the head portion 16 out of the plane of the legs 20, 22 by a corresponding angle. This bending may be effected on site to suit the particular application. For example, where the edge profile of the concrete panel is angled at 15 degrees, the head portion 16 of the anchor is correspondingly bent upwards at an angle of 15 degrees relative to the plane of the legs 20, 22. Similarly, where the edge profile of the concrete panel is angled at 45 degrees, the head portion 16 of the anchor 10 is bent upwards to a corresponding angle of 45 degrees relative to the plane of the legs 20, 22.
- the anchor 10 includes a collar 26 adapted to fit around the head portion 16, as shown in Figure 1.
- the collar 26 forms abutment shoulders 28 at upper and lower locations of the head portion 16 for cooperation with a body of the clutch to limit clutch rotation relative to the anchor 10.
- the collar 26 includes an attachment portion 58 for attaching the collar 26 to the lifting anchor 10, and an abutment portion 60 adapted to provide a clutch abutment surface for limiting rotation of a clutch relative to the lifting anchor 10.
- the attachment portion 58 is arranged for attaching the collar 26 to the head portion 16 of the lifting anchor 10.
- the clutch abutment surface is formed as an abutment shoulder 28 standing proud of each opposed surface or side of the head portion 16 for limiting rotation of the clutch about an eye 62 of the head portion 16, in both directions of rotation.
- the collar 26 may include a gap 64 between the shoulders 28 which coincides with the eye 62 of the head portion 16 to allow passage of the clutch through the eye 62.
- the collar 26 is generally C-shaped, including a pair of clasps for coupling to those parts of the head portion defining the opposed surfaces or sides of the head portion 16, with a connecting strip 66 between the clasps. Each clasp terminates in a tab 68 which secures the collar 26 to the head portion 16 by way of a hard press fit.
- the abutment portion 60 is formed by an edge of the collar 26, at each of the clasps.
- the collar 26 includes a pair of shear bars 30, 32 attached to the collar 26.
- the shear bars 30, 32 extend generally perpendicularly to the central axis 24 and transverse to the plane of the body portion 18. These shear bars 30, 32 assist in preventing shear failure of the concrete component 12 during lifting, and provide improved anchorage of the anchor 10 within the concrete component 12.
- Each of the shear bars 30, 32 is formed in a generally wave-like shape, with lateral oscillations 34 in a direction generally perpendicular to the central axis 24 of the anchor 10.
- a second one of the shear bars 30 is located adjacent a first one of the shear bars 32, and is reversed such that the second shear bar 30 is substantially a mirror image of the first shear bar 32 when viewed from an end of the anchor 10.
- the shear bars 30, 32 may be positively held in place relative to the head portion 16 by engagement of the shear bars 30, 32 within grooves 36 formed in the collar 26.
- the grooves 36 formed on opposite sides of the collar 26 may be formed in a correspondingly offset configuration so as to positively locate the shear bars 30, 32 in the arrangement shown.
- the shear bars 30, 32 may be fixed relative to the head portion 16 by spot welding of the shear bars 30, 32 to the collar 26.
- the collar 26 is particularly suited for use in providing a concrete component lifting anchor formed of bent rod or wire with clutch abutment surfaces for limiting rotation of a clutch relative to the lifting anchor. This is because there is not the same ability in providing anchors formed of bent wire with shoulders as there is with anchors cut from plate.
- collars formed in accordance with other examples of the present invention it is possible for collars formed in accordance with other examples of the present invention to be used with anchors formed from plate, and such collars may provide various advantages over cut abutment shoulders.
- using a collar according to an example of the present invention provides the ability to interchange collars to change the size/shape of abutment shoulders, and provides a convenient way to attach shear bars to the anchor.
- the collar 26 is preferably formed of metal, in particular from folded steel. In other examples, the collar may be formed from plastic.
- the anchor 10 is formed from metal bar, material wastage is minimised, and the anchor 10 is manufactured in a particularly cost-effective manner.
- the head portion 16 is formed by bending the metal rod around a forming piece (nor shown), the forming piece being a pin having a size corresponding to the size of a clutch portion to pass through the head portion 16.
- the forming piece being a pin having a size corresponding to the size of a clutch portion to pass through the head portion 16.
- the anchor 10 being formed from round cross-section metal rod, there is a single point of contact between the clutch portion and the anchor 10, avoiding the problems associated with skewed prior art anchors cut from metal plate which tend to transfer undesirable forces to the concrete component 12.
- the anchor 10 forms part of an anchor assembly 38 which includes a chair 40.
- the chair 40 comprises an upper part 44 and a lower part 46 which are fitted together, with the upper part 44 having clips 48 for holding the anchor 10 in place relative to the chair 40, as shown in Figures 3 to 5.
- Figure 6 shows a detailed view of the upper part 44 and the lower part 46 in isolation.
- the chair 40 is arranged for supporting the anchor 10 within the concrete component 12, with the plane of the body portion 18 coplanar or oriented substantially parallel to a central plane of the concrete component 12.
- the body portion 18 By virtue of the plane of the body portion 18 being coplanar with or substantially parallel to a central plane of the concrete component 12, it is possible for the body portion 18 to be located at or within a neutral axis of the concrete component 12 so as to avoid having the anchor embedded in regions of the concrete component 12 which are under high compression and/or tension during lifting. This may assist in avoiding failure of the concrete component 12 during lifting, and may enable lifting of concrete panels at a stage more premature (relative to the time of casting) than is required for lifting using existing concrete anchors.
- the feature of the plane of the body portion 18 being coplanar with or substantially parallel to the central plane of the concrete component 12 enables the anchor to be used with concrete panels much thinner than is required for lifting using existing concrete anchors which extend transversely across a substantial portion of the thickness of the panel.
- Figure 7 shows an edge of a concrete component 12 in which the anchor 10 is embedded.
- a void 56 is formed around the head portion 16, and facilitates engagement of a clutch with the anchor 10 for lifting of the concrete component 12.
- the anchor 10 is shown as being mounted in a central part of the concrete component 12, it will be appreciated by those skilled in the art that the anchor 10 may be mounted within the concrete component 12 in a lower location such that the plane of the body portion 18 is below the central plane of the concrete component 12.
- the example anchor depicted in the drawings has an angle between the plane of the legs and the plane of the head portion of approximately 90 degrees, it will be understood that in alternative examples the angle between the plane of the legs and the plane of the head portion may take other values, for example 60, 45, 30 or 15 degrees. This angle may be dictated by the shape and/or orientation of the concrete component.
- 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.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2008906229A AU2008906229A0 (en) | 2008-12-02 | A collar for a concrete lifting anchor | |
PCT/AU2009/001541 WO2010063062A1 (en) | 2008-12-02 | 2009-11-25 | A collar for a concrete lifting anchor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2504504A1 true EP2504504A1 (en) | 2012-10-03 |
EP2504504A4 EP2504504A4 (en) | 2015-09-02 |
Family
ID=42232808
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09829877.1A Withdrawn EP2504504A4 (en) | 2008-12-02 | 2009-11-25 | A collar for a concrete lifting anchor |
Country Status (7)
Country | Link |
---|---|
US (1) | US20120304554A1 (en) |
EP (1) | EP2504504A4 (en) |
AU (1) | AU2009230823B2 (en) |
CA (1) | CA2781472A1 (en) |
NZ (1) | NZ581179A (en) |
RU (1) | RU2554362C2 (en) |
WO (1) | WO2010063062A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PT2233664E (en) * | 2009-03-12 | 2010-11-22 | Gerhard Krummel | Device for connecting prefabricated concrete sections |
US8978343B1 (en) * | 2014-07-18 | 2015-03-17 | Frederick J Sandor | Method and system for transporting a cast panel |
AU2016282080B2 (en) * | 2015-06-24 | 2019-01-17 | Woodstock Percussion Pty Ltd | Narrow edge lifting insert |
US11549273B2 (en) * | 2017-08-10 | 2023-01-10 | ALP Supply, Inc. | Lift anchor for precast concrete component |
US11421431B1 (en) | 2019-02-21 | 2022-08-23 | ALP Supply, Inc. | Erection anchor with coil legs |
WO2022074563A1 (en) * | 2020-10-05 | 2022-04-14 | Rrd Engineering, Llc Dba The Floating Wind Technology Company | Padeye configured to be attached to a suction anchor |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3705469A (en) * | 1970-12-10 | 1972-12-12 | Superior Concrete Accessories | Anchor insert and setting cone for a precast concrete body |
US4000591A (en) * | 1975-08-04 | 1977-01-04 | Superior Concrete Accessories, Inc. | Holder adapted for supporting an anchor insert to be embedded in a concrete slab |
FR2481728A1 (en) * | 1980-05-05 | 1981-11-06 | Cotard Didier | Prefabricated concrete fencing post - includes fitting comprising rod extending across embedded casing with clips to reinforcing frame |
US4512121A (en) * | 1983-05-24 | 1985-04-23 | Roger Carydias | Handling system for precast units |
SU1520221A1 (en) * | 1987-09-18 | 1989-11-07 | Управление По Проектированию Общественных Зданий И Сооружений | Anchorage device |
WO1990010764A1 (en) * | 1989-03-07 | 1990-09-20 | Ramset Fasteners (Aust.) Pty. Limited | Lifting anchors and clutches for lifting anchors |
CA2113452A1 (en) * | 1991-07-15 | 1993-02-04 | Kevin J. O'kane | Anchorage device |
DE29800905U1 (en) * | 1998-01-20 | 1999-05-27 | Ytong Ag | Transport anchor for reinforced concrete elements |
AUPR213600A0 (en) * | 2000-12-18 | 2001-01-25 | Tiltform Design & Development Pty Ltd | Clutch assembly for tilt-up panels |
EP1483466B1 (en) * | 2001-09-05 | 2008-12-24 | Austrim National Radiators Limited T/A Reid Engineering Systems | Orientation apparatus |
US7296382B2 (en) * | 2003-01-09 | 2007-11-20 | Pennsylvania Insert Corp. | Injection molded thermoplastic insert |
AU2004213065B2 (en) * | 2003-02-21 | 2009-12-03 | Itw Ramset Australia Pty Ltd | Panel lifter lock |
AU2004200854B2 (en) * | 2003-04-14 | 2010-05-13 | Cetram Pty Limited | Lifting anchors |
US20070186492A1 (en) * | 2006-02-15 | 2007-08-16 | Dayton Superior Corporation | Lifting fixture for concrete structures |
JP4998904B2 (en) * | 2006-12-22 | 2012-08-15 | アルテオン,マルセル | Anchor for lifting concrete panels |
US7905063B2 (en) * | 2008-07-15 | 2011-03-15 | Mmi Products, Inc. | Double anchor and lifting shackle for concrete slabs |
US7950190B2 (en) * | 2008-08-12 | 2011-05-31 | Schulze Todd M | Concrete panel lifting insert assembly |
US8171678B2 (en) * | 2009-01-28 | 2012-05-08 | Actuant Corporation | Slab lift bracket |
-
2009
- 2009-10-29 AU AU2009230823A patent/AU2009230823B2/en not_active Ceased
- 2009-11-13 NZ NZ581179A patent/NZ581179A/en not_active IP Right Cessation
- 2009-11-25 RU RU2012125909/03A patent/RU2554362C2/en not_active IP Right Cessation
- 2009-11-25 US US13/511,647 patent/US20120304554A1/en not_active Abandoned
- 2009-11-25 EP EP09829877.1A patent/EP2504504A4/en not_active Withdrawn
- 2009-11-25 CA CA2781472A patent/CA2781472A1/en not_active Abandoned
- 2009-11-25 WO PCT/AU2009/001541 patent/WO2010063062A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2010063062A1 * |
Also Published As
Publication number | Publication date |
---|---|
RU2012125909A (en) | 2013-12-27 |
NZ581179A (en) | 2011-06-30 |
US20120304554A1 (en) | 2012-12-06 |
CA2781472A1 (en) | 2010-06-10 |
EP2504504A4 (en) | 2015-09-02 |
AU2009230823B2 (en) | 2016-08-04 |
AU2009230823A1 (en) | 2010-06-17 |
RU2554362C2 (en) | 2015-06-27 |
WO2010063062A1 (en) | 2010-06-10 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20120525 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR |
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DAX | Request for extension of the european patent (deleted) | ||
RA4 | Supplementary search report drawn up and despatched (corrected) |
Effective date: 20150730 |
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RIC1 | Information provided on ipc code assigned before grant |
Ipc: E04C 5/12 20060101AFI20150724BHEP Ipc: B66F 19/02 20060101ALI20150724BHEP Ipc: B66C 13/06 20060101ALI20150724BHEP Ipc: B66C 13/04 20060101ALI20150724BHEP |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20160301 |