EP0330519A1 - Radförmiger Abstandshalter für Bewehrungskörbe - Google Patents

Radförmiger Abstandshalter für Bewehrungskörbe Download PDF

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Publication number
EP0330519A1
EP0330519A1 EP89301906A EP89301906A EP0330519A1 EP 0330519 A1 EP0330519 A1 EP 0330519A1 EP 89301906 A EP89301906 A EP 89301906A EP 89301906 A EP89301906 A EP 89301906A EP 0330519 A1 EP0330519 A1 EP 0330519A1
Authority
EP
European Patent Office
Prior art keywords
gap
ring
aperture
bar
wheel
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Withdrawn
Application number
EP89301906A
Other languages
English (en)
French (fr)
Inventor
Michael Carmel Cachia
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.)
Mcm (machine Sales) Ltd
Original Assignee
Mcm (machine Sales) 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 Mcm (machine Sales) Ltd filed Critical Mcm (machine Sales) Ltd
Publication of EP0330519A1 publication Critical patent/EP0330519A1/de
Withdrawn legal-status Critical Current

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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
    • E04C5/203—Circular and spherical spacers

Definitions

  • the present invention relates to a spacer wheel for the steel reinforcement cages of concrete piles.
  • a bore is excavated and filled with concrete.
  • a steel cage is lowered into the hole, usually after it has been filled with concrete, and it is important for the cage to be spaced from the walls of the bore.
  • spacer wheels which can be slipped over the horizontal bars of the cage and act not only as spacers but also as guides for the cage as it is lowered into the bore.
  • the spacer wheels must be capable of being fitted to an assembled cage.
  • a spacer wheel prefferably to comprise a main body which defines a rim interrupted by a gap through which, in operation, the cage bar can be passed, an aperture in the main body which communicates with the gap in the rim, and bearing means located within the aperture of the main body for receiving the cage bar.
  • One such wheel shown in Figure 1 of the drawings, is formed as a one piece plastics moulding and has an interrupted rim 10 connected by spokes 12 to a discon­tinuous hub 14. This construction permits the wheel to be slipped onto a bar by pushing the bar into the gap 16 in the rim, the bar being guided into the hub where it is retained by two generally semi-circular prongs 18, which act as the bearing means.
  • the object of the present invention is to provide a spacer wheel which can be mounted on a cage bar and which is not easily dislodged during handling of the cage.
  • a spacer wheel for mounting on a bar of a concrete rein­forcement cage, comprising a main body which defines a rim interrupted by a gap through which, in operation, the cage bar can be passed, an aperture in the main body which communicates with the gap in the rim, and bearing means located within the aperture of the main body for receiving the cage bar, characterised in that the main body is an essentially solid, disc-like, member, the bearing means comprises an interrupted ring having a radially inner surface which, in operation, receives the cage bar and serves as a bearing therefor, and a radially outer surface connected to the wall of the aperture only at points spaced from the gap in the ring, whereby the ring may be deformed to enlarge the gap therein without corresponding deformation of the walls of the aperture, and guiding means extend between the gap in the ring and the walls of the aperture, which guiding means serve during mounting of the spacer wheel on a cage bar to direct the bar towards the gap in the ring and to wide
  • the spacer wheel of the invention differs from that shown in Figure 1, in the first instance, in that the disc of the wheel is solid and concrete cannot pass from one side of the disc to the other as it can be­ tween the spokes 12. As a result, the wheel can roll more freely while being lowered into concrete as it does not need displace concrete during its rotation.
  • the solid disc is also less easily distorted on meeting an obstruction and more force is required to push the cage bar through the gap in the rim of the wheel both top fit the wheel to a cage bar and to dislodge it from a cage bar.
  • a second difference is that the cage bar received in the aperture in the body of the wheel does not rest on the wall of this aperture directly. Instead, the bar is received within a separate ring disposed within the aperture.
  • the effect of this construction is that if the body of the wheel should be twisted for any reason during the handling of the cage, it does not result in the bearing being twisted off the cage bar.
  • the bearing ring requires significant force to deform it to permit the bar to be inserted into it and this is achieved with the help of the guiding means which act as levers to prise the bearing ring apart at the gap. Once the bar is received within the ring, much more force is required to act between the bar and the bearing ring before the bar can be extracted.
  • the gap in the rim of the wheel is narrower than the inner diame­ter of the bearing ring, that is to say narrower than the diameter of the cage bar.
  • the bearing ring is connected to the wall of the aperture only at three points, disposed at 90°, 180° and 270° from the gap.
  • the inner surface of the bearing ring is provided with radial teeth to contact the surface of the cage bar.
  • the wheel shown in Figure 2 is a solid disc 30 having a hub-receiving aperture 24 which is wide at the centre and communicates with a gap 26 in the rim 20 of the disc.
  • the gap 26 is narrower than the diameter of a cage bar on which the wheel is to be mounted.
  • the rim 20 which is of greater thickness than the disc, is connected by spoke-like reinforcement ribs 22 to the wall 24a of the aperture 24, the wall 24a being of the same width as the rim 20 and as a bearing ring 24b connected to the wall 24a at three support points 24d.
  • the bearing ring 24 is interrupted at 24c by a gap of narrower width than the cage bar on which the wheel is to be mounted.
  • the gap 24c forms part of an insertion passage defined between two guide members 27 extending from the gap 24c to the wall 24a of the aperture 24.
  • the wheel To mount the wheel on a cage bar, the wheel is position with the gap 26 in line with the bar and it is hammered so that the bar first passes through the gap 26, then through the passage 24c into the centre of the bearing ring 24b, which acts as a hub for the wheel.
  • the inner ring 24b has inwardly extending teeth 32 which grip the cage bar and form a bearing surface allowing the wheel to rotate about the cage bar.
  • the bar When inserted into the inner ring 24 of the hub 24 the bar is firmly captured and the construction of the wheel ensure that it cannot be dislodged with ease.
  • the inner ring 24b and outer ring 24a are connected only at points 24d spaced from the gap 24c so that twisting of the disc 30 does not tend to twist the bearing ring 24b off the cage bar.
  • the disc is itself rigid be­cause it is solid and because of the depth of the rim 20, the wall 24a and the reinforcement ribs 22.
  • the wheel can be formed by injection moulding of a tough plastics material such as high density polythene.
  • the shape of the teeth 32 can be varied by the use of different inserts in the mould and as a result it is possible to use the same injection mould in the manu­facture of wheels suitable for cage bars of different diameters.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Piles And Underground Anchors (AREA)
EP89301906A 1988-02-25 1989-02-27 Radförmiger Abstandshalter für Bewehrungskörbe Withdrawn EP0330519A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8804414 1988-02-25
GB8804414A GB2215355A (en) 1988-02-25 1988-02-25 Spacer wheel for steel cages

Publications (1)

Publication Number Publication Date
EP0330519A1 true EP0330519A1 (de) 1989-08-30

Family

ID=10632351

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89301906A Withdrawn EP0330519A1 (de) 1988-02-25 1989-02-27 Radförmiger Abstandshalter für Bewehrungskörbe

Country Status (2)

Country Link
EP (1) EP0330519A1 (de)
GB (1) GB2215355A (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6557317B2 (en) * 2001-06-29 2003-05-06 Felix L. Sorkin Concrete reinforcing bar support
AU2013202153B2 (en) * 2010-08-20 2014-12-11 Mee, Dennis J. MR Retaining Clip for Spacing Devices

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1042727A (en) * 1963-11-21 1966-09-14 Ferdinand William Berry Improvements in spacer members for the reinforcement of reinforced concrete
US3280529A (en) * 1963-05-21 1966-10-25 Reuss Kuno Spacer for concrete reinforcing bars
DE1609713A1 (de) * 1965-04-13 1970-04-02 Leibundgut Max Abstandshalter fuer Armierungseisen
CH521493A (de) * 1970-01-07 1972-04-15 Novoplast Gmbh Distanzhalter
DE3126271A1 (de) * 1981-07-03 1983-01-20 Gebr. Seifert GmbH & Co, 5880 Lüdenscheid Speichenradfoermiger abstandhalter fuer betonbewehrungen
DE8535866U1 (de) * 1985-12-20 1986-03-06 Dausend, Hans Werner, 5600 Wuppertal Abstandhalter für Bewehrungseisen bei Betonteilen

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1946137U (de) * 1966-04-14 1966-09-15 Kuno Reuss Abstandhalter fuer beton-bewehrungseisen.
GB1169783A (en) * 1967-04-28 1969-11-05 Celmac Plasclip Ltd Improvements in or relating to Distance Pieces for Reinforced Concrete
GB1263633A (en) * 1969-03-17 1972-02-16 Attema Kunststoffenind Improvements in or relating to distance pieces for reinforcing rods
GB1342312A (en) * 1971-06-03 1974-01-03 Clerq A De Distance pieces for reinforcing bars in concrete
GB2088434B (en) * 1980-12-01 1984-06-06 Conac Ltd Resilient deformable reinforcement-bar spacer
AU4257885A (en) * 1984-05-25 1986-10-30 Gie, Loa Tjhong Plastics spacers for concrete reinforcement
DE3432346A1 (de) * 1984-09-03 1986-03-13 Walter 4000 Düsseldorf Hoff Einsatzkoerper fuer betonschalungen und verfahren zu seiner herstellung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3280529A (en) * 1963-05-21 1966-10-25 Reuss Kuno Spacer for concrete reinforcing bars
GB1042727A (en) * 1963-11-21 1966-09-14 Ferdinand William Berry Improvements in spacer members for the reinforcement of reinforced concrete
DE1609713A1 (de) * 1965-04-13 1970-04-02 Leibundgut Max Abstandshalter fuer Armierungseisen
CH521493A (de) * 1970-01-07 1972-04-15 Novoplast Gmbh Distanzhalter
DE3126271A1 (de) * 1981-07-03 1983-01-20 Gebr. Seifert GmbH & Co, 5880 Lüdenscheid Speichenradfoermiger abstandhalter fuer betonbewehrungen
DE8535866U1 (de) * 1985-12-20 1986-03-06 Dausend, Hans Werner, 5600 Wuppertal Abstandhalter für Bewehrungseisen bei Betonteilen

Also Published As

Publication number Publication date
GB8804414D0 (en) 1988-03-23
GB2215355A (en) 1989-09-20

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