EP1375774A1 - Stahlbetonkörper - Google Patents

Stahlbetonkörper Download PDF

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Publication number
EP1375774A1
EP1375774A1 EP03254150A EP03254150A EP1375774A1 EP 1375774 A1 EP1375774 A1 EP 1375774A1 EP 03254150 A EP03254150 A EP 03254150A EP 03254150 A EP03254150 A EP 03254150A EP 1375774 A1 EP1375774 A1 EP 1375774A1
Authority
EP
European Patent Office
Prior art keywords
arrangement
passage
collet
collar parts
tapering
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Withdrawn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
EP03254150A
Other languages
English (en)
French (fr)
Inventor
Roger Alfred Bullivant
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.)
Roxbury Ltd
Original Assignee
Roxbury 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
Priority claimed from GB0214929A external-priority patent/GB0214929D0/en
Priority claimed from GB0217356A external-priority patent/GB0217356D0/en
Application filed by Roxbury Ltd filed Critical Roxbury Ltd
Publication of EP1375774A1 publication Critical patent/EP1375774A1/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Withdrawn legal-status Critical Current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
    • E04C5/162—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
    • E04C5/165—Coaxial connection by means of sleeves

Definitions

  • the present invention relates to apparatus for use in forming reinforced concrete bodies.
  • a reinforced concrete body may consist of a reinforcing bar or frame of interconnected reinforcing bars embedded within the concrete, to provide reinforcement. Reinforcing bars are often connected together, such as by welding, within the body or for connection between bodies.
  • the present invention provides an attachment arrangement for use in forming a mechanical connection between elongate reinforcing members for concrete, the arrangement having the form of two collet arrangements for receiving and gripping the ends of respective elongate members, each collet arrangement comprising a plurality of collar parts which together define between them a space for receiving the respective reinforcing member to form a collar therearound, the collar parts together defining a tapering outer surface for the collar and being located within a tapering passage, the arrangement further comprising an abutment member movably located within the passage and between the collar parts of the respective collet arrangements, and an adjustment arrangement operable, in use, to reduce the length of the passage, whereby to simultaneously tighten both collet arrangements around their respective elongate members.
  • the adjustment arrangement includes a threaded member which is threadedly movable to change the length of the passage.
  • the passage preferably houses at least one taper insert which defines the tapering passage and receives the collet parts of one of the collet arrangements, so that movement of the taper insert causes the grip of the collet parts to change.
  • the taper insert may have a face against which the threaded member bears when moved, to move the taper insert.
  • the bearing face is preferably generally transverse to the tapering passage, the threaded member being rotatable about the axis of the tapering passage to move axially by virtue of the thread, and thereby to cause the taper insert to move.
  • the tapering outer surfaces of the collar parts are preferably substantially frusto-conical.
  • the tapering passage may be substantially complementary to the outer surfaces of the collar parts, in the region by which the collar parts are engaged.
  • the collet arrangements are preferably generally oppositely directed.
  • the invention also provides an attachment arrangement for use in forming a mechanical connection to an elongate reinforcing member for concrete, the arrangement including a collet arrangement for receiving and gripping the end of the elongate member, the collet arrangement comprising a plurality of collar parts which together define between them a space for receiving the reinforcing member to form a collar therearound, the collar parts together defining a tapering outer surface for the collar and being located within a tapering passage, the tapering passage being defined by a taper insert, so that movement of the taper insert causes the grip of the collar parts to change, and the taper insert having a face against which a threaded member bears as it turns, to move the taper insert and adjust the collet arrangement.
  • bearing face is generally transverse to the tapering passage, the threaded member being rotatable about the axis of the tapering passage to move axially by virtue of the thread, and thereby cause the taper insert to move.
  • the tapering outer surfaces of the collar parts are preferably substantially frusto-conical.
  • the tapering passage is preferably substantially complementary to the outer surfaces of the collar parts, in the region by which the collar parts are engaged.
  • the arrangement may further comprise a second collet arrangement for receiving a second elongate member, there being an abutment member movably located within the passage and between the collar parts of the respective collet arrangements, whereby the threaded member is movable, in use, to reduce the length of the passage, whereby to simultaneously tighten both collet arrangements around their respective elongate members.
  • the two collet arrangements are generally oppositely directed.
  • Fig. 1 indicates at 10 the outline of a reinforced concrete body.
  • a frame of elongate reinforcing members (or "rebars") are provided, prior to the concrete material 14 being cast around the frame of members 12.
  • the frame of members 12 are therefore embedded within the material 14 to provide reinforcement.
  • the rebars 12 are mechanically connected at their ends by attachment arrangements 16.
  • the arrangements 16 connect the rebars 12 end-to-end.
  • Other joints may be formed e.g. by welding, such as at 18.
  • the rebars 12 may be of various different lengths and orientations, allowing a frame of appropriate shape to be formed for reinforcing the body of concrete, which may be of simple or complex shape.
  • the body 10 will be cast by providing shuttering once the frame of rebars 12 has been formed, and pouring concrete into the void within the shuttering, around the rebars 12, thereby embedding them within the body 10.
  • the body may, for example, be a component of a structure such as a building or bridge, in which case, the body may be cast in its final location.
  • Fig. 2 illustrates an attachment arrangement 16A.
  • the attachment arrangement 16A has two collet arrangements 20A, 22A, facing in generally opposite directions, for receiving the ends of respective rebars 12.
  • the arrangement 16A has a main body 52 through which a passage 54 extends.
  • the passage 54 is of generally constant cross-section.
  • a relatively narrow mouth 56 provides an entry aperture for a rebar 12.
  • a taper insert 57 is located within the passage 54, adjacent the mouth 56. This has a cylindrical outer surface 58, complementary to the passage 54, and tapering frusto-conical inner walls 59, within which collar parts 42A are received.
  • the collar parts 42A abut a spacer 60 which is free to move axially within the passage 54.
  • the insert 57 is also free to move axially along the passage 54.
  • the collar parts 42A may be three or more parts 42A arranged around the axis 46 of the passage 54.
  • the collar parts 42A define between them a space 44A which has parallel sides, aligned with the axis 46 of the tube 24.
  • the outer surfaces of the parts 42A are substantially frusto-conical and complementary with the frusto-conical inner walls 59. Accordingly, movement of a collar part toward or away from the mouth 56 will cause the part 42A to move closer to or away from the central axis 46. Moving the collar parts in this way will thus cause the space 44A to contract or expand according to the axial position of the parts 42A relative to the taper insert 57. Circumferential gaps (not shown) between adjacent collar parts 42A will also increase or reduce as the collar expands and contracts.
  • the passage 54 has a second mouth 64 of the same width as the passage 54.
  • the mouth 64 leads into an internally-threaded passage section 66 within which an externally threaded member 68 is engaged.
  • the member 68 defines a further mouth 70 through which a rebar 12 may be introduced into the passage 54.
  • a second taper insert 57A is provided in the passage 54, between the member 68 and the spacer 60, so that the member 68 bears on the transverse face of the insert 57A.
  • the taper insert 57A is identical to the insert 57, but is reversed so that the inner walls 59A again open toward the spacer 60.
  • a second set of collar parts 42A are received between the walls 59A and the spacer 60, so that axial movement of the collar parts relative to the insert 57 causes the collar to expand or contract, as described above.
  • Each transverse face of the spacer 60 is provided with a well 72 for receiving the end of a rebar.
  • a cushion 73 of resilient material is provided at the bottom of each well 72.
  • Relative rotation of the member 68 in the main body 52 changes the length of the passage 54 between the mouths 56, 64.
  • the member 68 can be tightened against the taper insert 57A to force the taper insert 57A toward the insert 57, thereby squeezing the sets of collar parts 42A between the spacer 60 and the respective taper walls 59, 59A.
  • This causes the collar parts 42A to press inwardly into the passage. Consequently, the arrangement 16A can be used to provide a mechanical connection between the ends of two rebars, as follows.
  • the member 68 is first turned to lengthen the passage and thus loosen the collar parts 42A by allowing them freedom to move away from the inserts 57, 57A.
  • any attempt to remove the rebar 12 from the mouths 56, 64 will tend to cause the collar parts 42A to be pulled towards the respective mouth 56, 64 and thus to engage the tapering walls 59, 59A of the respective insert 57, 57A. This further presses them inwardly toward the axis 46, to grip the rebar 12. As the withdrawing force is increased, so that gripping force is also increased, thus resulting in a secure joint which cannot be disconnected without deliberately damaging the arrangement.
  • the joint thus formed is therefore capable of conveying tension forces between the members 12, as will arise within reinforcing bars of reinforced concrete bodies.
  • Adequately tightening the member 68 in this manner allows any looseness or "play" within the arrangement to be substantially overcome or reduced. Provision of the cushions 73 has been found to allow slight axial movement of the device 16A, relative to the rebar, during tightening. This assists in tightening the arrangement to take up "play”.
  • Tightening of the arrangement is further assisted by the freedom for the spacer 60 to move axially along the passage 58.
  • the forces on the spacer 60 will cause it to adopt a position at which both collet arrangements are equally tight, even if the degree of movement required by each arrangement is different.
  • the arrangement of the member 68 and the insert 57A is advantageous in achieving a tightened joint.
  • the insert 57A is not required to turn as the arrangement is tightened. This avoids complex interactions between the insert 57A and the collar parts 42A, which have been found to arise if the insert 57A turns as it is tightened, and have been found to inhibit full tightening.
  • the provision of a transverse face on the insert 57A, against which the member 68 presses, allows axial movement of the insert 57A to be created without the rotation of the member 68 being conveyed to the insert 57A. Friction results between the member 68 and the transverse face of the insert 57A, but in the manner normally experienced in a conventional nut-and-bolt arrangement.
  • a frame of rebars 12 would be formed by loosely connecting the ends of the rebars by means of arrangements as shown in Fig. 2, and then tightening each arrangement 16A by turning the member 68, such as by means of a spanner or other tool. It is to be understood that only one tightening operation is necessary in order to tighten both collet arrangements of each connection. This arises because the various components are free to move axially within the body 52.
  • Fig. 3 illustrates a further arrangement 16B used to form a mechanical connection with a rebar 12 within a reinforced concrete body 10.
  • the end of the rebar 12 is close to the outer surface 74 of the body 10 and it is desired to fix the body 10 to an external item illustrated as a plate 76. Only a short length of rebar is shown in Fig. 3, outside the arrangement 16B, in the interests of clarity.
  • One end of the arrangement 16B is formed in the manner described in relation to Fig. 2, and the same reference numerals are thus used again.
  • the collet arrangement 22A can be tightened by means of a member 68 to grip the end of the rebar 12, once it has been inserted through the mouth 70.
  • a movable spacer 60 is illustrated, but could be replaced by an appropriate surface of the body 52 (or other fixed surface) for abutment with the collar parts 42A.
  • the other end of the arrangement 16B is not provided with collet arrangements, but with an internally threaded passage 78 into which a bolt 80 may be introduced after passing through the plate 76.
  • the bolt 80 can then be tightened within the passage 78 to tighten the plate 76 against the outer surface 74, thus securing together the body 10 and plate 76.
  • Provision of an attachment arrangement of the type illustrated in Fig. 3 readily allows the reinforced concrete body to be secured to other components, such as stanchions or other structural members in the event that the body 10 is an element of a building, bridge or other construction. It can readily be understood that forces are then transferred directly from the other member 76 to the rebars 12 within the body 10, by means of the arrangement 16B. This improves the mechanical integrity of the overall arrangement.
  • Fig. 4 illustrates a further alternative attachment arrangement 16C, which is similar to the arrangement of Fig. 2, in that two collet arrangements 20B, 22B are provided, facing in generally opposite directions.
EP03254150A 2002-06-28 2003-06-30 Stahlbetonkörper Withdrawn EP1375774A1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB0214929A GB0214929D0 (en) 2002-06-28 2002-06-28 Connection device
GB0214929 2002-06-28
GB0217356A GB0217356D0 (en) 2002-07-26 2002-07-26 Reinforced concrete bodies
GB0217356 2002-07-26

Publications (1)

Publication Number Publication Date
EP1375774A1 true EP1375774A1 (de) 2004-01-02

Family

ID=27736222

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03254150A Withdrawn EP1375774A1 (de) 2002-06-28 2003-06-30 Stahlbetonkörper

Country Status (2)

Country Link
EP (1) EP1375774A1 (de)
GB (1) GB2390103B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014124462A1 (en) * 2013-02-11 2014-08-14 Robert Gilling Assembly for connecting rebar segments

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU198093U1 (ru) * 2019-07-18 2020-06-17 Игорь Николаевич Тихонов Муфта для соединения арматурных стержней

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH138367A (de) * 1929-05-17 1930-02-28 Vontobel Robert Kupplung für Drahtseile und Drähte.
DD248838A1 (de) * 1986-05-09 1987-08-19 Bau Und Montagekomb Ost Betrie Muffenstoss zum verbinden von bewehrungsstaeben
GB2255385A (en) * 1991-05-02 1992-11-04 Lin Ming Hui A wedge-chuck connector
DE19743416A1 (de) * 1997-10-01 1999-02-25 Behrens Josef Dipl Ing Spannschloß zum Verbinden von Stählen
NL1012499C2 (nl) * 1999-07-02 2001-01-03 Novitec Internat B V Koppelorgaan voor wapeningsstaven.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH138367A (de) * 1929-05-17 1930-02-28 Vontobel Robert Kupplung für Drahtseile und Drähte.
DD248838A1 (de) * 1986-05-09 1987-08-19 Bau Und Montagekomb Ost Betrie Muffenstoss zum verbinden von bewehrungsstaeben
GB2255385A (en) * 1991-05-02 1992-11-04 Lin Ming Hui A wedge-chuck connector
DE19743416A1 (de) * 1997-10-01 1999-02-25 Behrens Josef Dipl Ing Spannschloß zum Verbinden von Stählen
NL1012499C2 (nl) * 1999-07-02 2001-01-03 Novitec Internat B V Koppelorgaan voor wapeningsstaven.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014124462A1 (en) * 2013-02-11 2014-08-14 Robert Gilling Assembly for connecting rebar segments
US9506250B2 (en) 2013-02-11 2016-11-29 Robert Gilling Assembly for connecting rebar segments

Also Published As

Publication number Publication date
GB0315221D0 (en) 2003-08-06
GB2390103B (en) 2006-03-22
GB2390103A (en) 2003-12-31

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