AU2003201278B2

AU2003201278B2 - Stand

Info

Publication number: AU2003201278B2
Application number: AU2003201278A
Authority: AU
Inventors: Brian Hilbert
Original assignee: TILT LIFT EQUIPMENT Pty Ltd
Current assignee: TILT-LIFT EQUIPMENT Pty Ltd
Priority date: 2002-03-14
Filing date: 2003-03-13
Publication date: 2006-10-26
Anticipated expiration: 2023-03-13
Also published as: AU2003201278A1

Description

P/00/011 Regulation 3.2

AUSTRALIA

Patents Act 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT

ORIGINAL

TO BE COMPLETED BY APPLICANT Name of Applicant: TILT-LIFT EQUIPMENT PTY LTD Actual Inventor: Brian Hilbert Address for Service: Invention Title: CALLINAN LAWRIE, 711 High Street, Kew, Victoria 3101, Australia

STAND

The following statement is a full description of this invention, including the best method of performing it known to me:- 13/03/03,eh12636.cov, 1 -2- This invention relates to a stand for supporting a fastening cast into concrete and relates particularly, though not exclusively to a stand for lifting anchors or ferrules.

In the fabrication of concrete components such as panels, slabs and beams it sometimes necessary to incorporate as part of the structure fastenings, for example, for use as an attachment point, or to facilitate lifting of the concrete component as part of the construction process. Examples of such fastenings include an internally-threaded ferrule for receiving a fastening bolt, or a lifting member for attachment to a clutch of a lifting system. Such fastenings are typically incorporated into the structure prior to the casting of the concrete so that they are embedded within the concrete. To incorporate the fastening, the fastening is supported in a stand which rests on the surface on which the concrete component is being cast. The stand must support the fastening so that the upper end of the fastening will project through the concrete component being cast. Typically, these stands have loosely held the fastening because of the tolerances of the dimensions of the fastenings. This looseness unfortunately allows the fastening to shift from its intended orientation when the concrete is poured. The movement of the concrete during the pour will allow movement. of the fastening within the stand and the fastening will then be set at a less than desirable orientation.

It is an object of the present invention to provide a stand which will alleviate this movement during the pouring of concrete.

A further object of the invention is to provide a stand which can accommodate variations in dimensional tolerances of fastenings which are inserted therein.

In accordance with the invention there is provided a stand for supporting a fastening to be cast into a concrete component, said stand including a base for supporting the fastening from below, said base including a ring member in which a part of said fastening is held and a cap member engageable with said ring member to close off said ring member from below, said ring member and said cap member having co-operating locking means to allow said part of said fastening to be, in use, clampingly engaged with said stand.

Preferably said ring member includes a plurality of inwardly directed projections adjacent the top of said ring member for engagement with said fastening. In a preferred I 3/03/03,ehl 2636.spc,2 embodiment said co-operating locking means includes at least one pair of ramping elements which, when said cap member is rotated to be fitted to said ring member, forces said fastening against said plurality of inwardly directed projections. In a practical embodiment said at least one pair of ramping elements include teeth which prevent said cap member from disengaging from said ring member.

In order that the invention may be more readily understood and put into practical effect, reference will now be made to the accompanying drawings, in which:- Fig. 1 is an exploded perspective view of a stand made in accordance with the invention for supporting a fastening to cast into concrete; Fig. 2 is a plan view of the stand shown in Fig. 1; and Fig. 3 is a cross-sectional view along and in the direction of arrows 3-3 shown in Fig. 2.

In the drawings there is shown a stand 10 for supporting a fastening 12. Fastening 12 is typically a lifting anchor (as shown), a ferrule, etc and these items are well known in the concrete construction field. Lifting anchor 12 has a cylindrical extension 14, a part of which will extend from the cured concrete (not shown) and will have a head (not shown) for engagement with a clutch of a lifting system (not shown). Such items are well known to the man skilled in the art and require no further explanation. Lifting anchor 12 has a lower head 16 in the form of a truncated conical section with an angled sidewall 18. Head 16 must be held fast in stand 10 to prevent movement of lifting anchor 12 relative to stand when the concrete is poured.

Stand 10 has base 19 and a cap member 21 which engage with one another. Base 19 has a ring member 20 with a plurality of arms 22 extending from the periphery thereof Arms 22 are basically triangular in shape with sides 24,26 and support ribs 28. Feet 30 are provided at the end of arms 22 to allow concrete to flow completely around stand 10. Arms 22 and feet 30 can vary in number, orientation and shape to suit requirements and are not to be construed to be limited to the example shown. Arms 22 and feet 30 have an open structure to permit concrete to flow downwardly therethrough during casting to prevent the formation of voids. At the top of ring member 20 are located a plurality of projections 32 of any desired shape which project radially inwardly from the periphery of ring member Strengthening ribs 34 attached to projections 32 will reduce flexure of projections 32 13/03/03ehl 2636.spc.3 and enhance the clamping action to be discussed later. To complete base 19, a plurality of inclined ramps 36 are located on the inner periphery of ring member 20. Teeth 38 face upwardly and are located along each incline to act in a ratchet mode with cap member 21.

Cap member 21 has a solid base 40 and is attached to an annular collar 42. Base 40 may include sealing rings 44 (as shown) if required. Feet 46 extend from the lower end of annular collar 42 and may include strengthening ribs 48. A plurality of inclined ramps are located on the outer periphery of annular collar 42 and they match the number of inclined ramps 36 on ring member 20. Teeth 52 face downwardly and are located along each incline to act in a ratchet mode with ring member In use, head 16 of lifting anchor 12 is inserted into ring member 20 by tilting head 16 to allow head 16 to be located below projections 32 but encircled by ring member 20. Cap member 21 is inserted into ring member 20 with inclined ramps 50 being located between respective gaps between the inclined ramps 36 of ring member 20. Head 16 will then be held captive between projections 32 and base 40 of cap member 21. The twisting of cap member 21 will allow adjacent inclined ramps 36,50 to engage with one another to force cap member 21 further inside ring member 20. Respective teeth 38,52 will engage in a ratchet like manner to prevent cap member 21 from being withdrawn from ring member 20. Further twisting will force angled sidewall of head 16 to engage support ribs 28 and/or projections 32 and prevent any further twisting. Head 16 will be clampingly engaged between support ribs 28 and/or projections 32 and solid base 40 of cap member 21. Stand and its associated lift anchor 12 can then be positioned for the concrete pour. As the lift anchor 12 is locked to stand 10 there will be no relative movement therebetween when the concrete is poured. Because of the ramping and ratchet actions, variations in dimensional tolerances for both stand 10 and lift anchor 12 will not affect the positive locking action achieved by the invention.

It is preferred that base 19 and cap member 21 are formed as single one piece plastics mouldings. Although four pairs of inclined ramps 36,50 have been shown the number thereof can be increased or decreased to suit manufacturing needs.

Throughout this specification, unless the context requires otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a 13/03/03,ehl 2636.spc.4 stated integer or group of integers, but not the exclusion of any other integer or group of integers.

The invention will be understood to embrace many further modifications as will be readily apparent to persons skilled in the art and which will be deemed to reside within the broad scope and ambit of the invention, there having been set forth herein only the broad nature of the invention and a certain specific embodiment by way of example.

13/03/03,ehl 2636.sp.,5

Claims

1. A stand for supporting a fastening to be cast into a concrete component, said stand including a base for supporting the fastening from below, said base including a ring member in which a part of said fastening is held and a cap member engageable with said ring member to close off said ring member from below, said ring member and said cap member having co-operating locking means to allow said part of said fastening to be, in use, clampingly engaged with said stand.

2. The stand of claim 1, wherein said ring member includes a plurality of inwardly directed projections adjacent the top of said ring member for engagement with said fastening.

3. The stand of claim 2, wherein said co-operating locking means includes at least one pair of ramping elements which, when said cap member is rotated to be fitted to said ring member, forces said fastening against said plurality of inwardly directed projections.

4. The stand of claim 3, wherein said at least one pair of ramping elements include teeth which prevent said cap member from disengaging from said ring member.

The stand of claim 3 or claim 4, wherein a plurality of pairs of ramping elements are provided.

6. The stand of claim 5, wherein the number of inwardly directed projections equals the number of pairs of ramping elements.

7. The stand of any one of the preceding claims, wherein said base includes a plurality of arms extending from said ring member and support feet are provided at the end of each arm.

8. A stand for supporting a fastening to be cast into a concrete component substantially as hereinbefore described with reference to the accompanying drawings. Dated this 13 th day of March, 2003. TILT-LIFT EQUIPMENT PTY LTD By their Patent Attorneys: CALLINAN LAWRIE 1 3/3/03,ehl 2 6 3 6 .spc,6