EP1375774A1 - Reinforced concrete bodies - Google Patents
Reinforced concrete bodies Download PDFInfo
- 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- Withdrawn
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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.
Abstract
Description
- 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.
- Preferably, 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.
- Preferably the 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.
- Preferably, the two collet arrangements are generally oppositely directed.
- Examples of the present invention will now be described in more detail, by way of example only, and with reference to the accompanying drawings, in which:
- Fig. 1 is a schematic perspective diagram of a reinforced concrete body incorporating attachment arrangements in accordance with the present invention;
- Fig. 2 is an enlarged, part-sectional view of an attachment arrangement used within the body of Fig. 1;
- Fig. 3 illustrates an alternative form of attachment arrangement; and
- Fig. 4 illustrates a further alternative form of attachment arrangement.
-
- Fig. 1 indicates at 10 the outline of a reinforced concrete body. Within the 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. In the final form of thebody 10, the frame ofmembers 12 are therefore embedded within the material 14 to provide reinforcement. - The
rebars 12 are mechanically connected at their ends byattachment arrangements 16. Thearrangements 16 connect therebars 12 end-to-end. Other joints may be formed e.g. by welding, such as at 18. Therebars 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. - It is envisaged that the
body 10 will be cast by providing shuttering once the frame ofrebars 12 has been formed, and pouring concrete into the void within the shuttering, around therebars 12, thereby embedding them within thebody 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. Theattachment arrangement 16A has twocollet arrangements respective rebars 12. - The
arrangement 16A has amain body 52 through which apassage 54 extends. Thepassage 54 is of generally constant cross-section. At one end of thepassage 54, a relativelynarrow mouth 56 provides an entry aperture for arebar 12. Within thepassage 54, adjacent themouth 56, ataper insert 57 is located. This has a cylindricalouter surface 58, complementary to thepassage 54, and tapering frusto-conicalinner walls 59, within whichcollar parts 42A are received. Thecollar parts 42A abut aspacer 60 which is free to move axially within thepassage 54. Theinsert 57 is also free to move axially along thepassage 54. - There may be three or
more parts 42A arranged around theaxis 46 of thepassage 54. Thecollar parts 42A define between them aspace 44A which has parallel sides, aligned with theaxis 46 of the tube 24. The outer surfaces of theparts 42A are substantially frusto-conical and complementary with the frusto-conicalinner walls 59. Accordingly, movement of a collar part toward or away from themouth 56 will cause thepart 42A to move closer to or away from thecentral axis 46. Moving the collar parts in this way will thus cause thespace 44A to contract or expand according to the axial position of theparts 42A relative to thetaper insert 57. Circumferential gaps (not shown) betweenadjacent collar parts 42A will also increase or reduce as the collar expands and contracts. - At the other end of the
arrangement 16A, thepassage 54 has asecond mouth 64 of the same width as thepassage 54. Themouth 64 leads into an internally-threadedpassage section 66 within which an externally threadedmember 68 is engaged. Themember 68 defines afurther mouth 70 through which arebar 12 may be introduced into thepassage 54. Asecond taper insert 57A is provided in thepassage 54, between themember 68 and thespacer 60, so that themember 68 bears on the transverse face of theinsert 57A. Thetaper insert 57A is identical to theinsert 57, but is reversed so that theinner walls 59A again open toward thespacer 60. A second set ofcollar parts 42A are received between thewalls 59A and thespacer 60, so that axial movement of the collar parts relative to theinsert 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. Acushion 73 of resilient material is provided at the bottom of each well 72. - Relative rotation of the
member 68 in themain body 52 changes the length of thepassage 54 between themouths member 68 can be tightened against thetaper insert 57A to force thetaper insert 57A toward theinsert 57, thereby squeezing the sets ofcollar parts 42A between thespacer 60 and therespective taper walls collar parts 42A to press inwardly into the passage. Consequently, thearrangement 16A can be used to provide a mechanical connection between the ends of two rebars, as follows. Themember 68 is first turned to lengthen the passage and thus loosen thecollar parts 42A by allowing them freedom to move away from theinserts respective mouths loose collar parts 42A and into thewells 72. At this stage, thecollar parts 42A will fit loosely around the rebar ends, and will not be able to grip the ends. Themember 68 is then turned relative to thebody 52 to shorten the passage length, pressing thetaper inserts collar parts 42A against thespacer 60. Further tightening of themember 68 thus causes thecollar parts 42A to be pressed inwardly to grip the respective rebar ends. Thereafter, any attempt to remove therebar 12 from themouths collar parts 42A to be pulled towards therespective mouth tapering walls respective insert axis 46, to grip therebar 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 themembers 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 thecushions 73 has been found to allow slight axial movement of thedevice 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 thepassage 58. Thus, the forces on thespacer 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. - It has been found that the arrangement of the
member 68 and theinsert 57A is advantageous in achieving a tightened joint. In particular, it can be seen that theinsert 57A is not required to turn as the arrangement is tightened. This avoids complex interactions between theinsert 57A and thecollar parts 42A, which have been found to arise if theinsert 57A turns as it is tightened, and have been found to inhibit full tightening. The provision of a transverse face on theinsert 57A, against which themember 68 presses, allows axial movement of theinsert 57A to be created without the rotation of themember 68 being conveyed to theinsert 57A. Friction results between themember 68 and the transverse face of theinsert 57A, but in the manner normally experienced in a conventional nut-and-bolt arrangement. - Furthermore, isolating the rotation of the
member 68 from the axial movement of theinsert 57A has been found to reduce or eliminate any torque on therebar 12 as a result of tightening. - Consequently, it is envisaged that 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 eacharrangement 16A by turning themember 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 thebody 52. - Fig. 3 illustrates a further arrangement 16B used to form a mechanical connection with a
rebar 12 within a reinforcedconcrete body 10. In this example, the end of therebar 12 is close to theouter surface 74 of thebody 10 and it is desired to fix thebody 10 to an external item illustrated as aplate 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. In particular, the
collet arrangement 22A can be tightened by means of amember 68 to grip the end of therebar 12, once it has been inserted through themouth 70. Again, amovable spacer 60 is illustrated, but could be replaced by an appropriate surface of the body 52 (or other fixed surface) for abutment with thecollar parts 42A. - The other end of the arrangement 16B is not provided with collet arrangements, but with an internally threaded
passage 78 into which abolt 80 may be introduced after passing through theplate 76. Thebolt 80 can then be tightened within thepassage 78 to tighten theplate 76 against theouter surface 74, thus securing together thebody 10 andplate 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 theother member 76 to therebars 12 within thebody 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 twocollet arrangements - The principal difference, in comparison with the arrangement of Fig. 2, is that the
inserts collar parts 42B are provided at 59C, 59D by tapering walls of thepassage 54A, and by tapering walls of themember 68A. Thespacer 60A is free to move along thepassage 54A, and again allows both collet arrangements to be tightened together. - Thus, as the
member 68A is turned to tighten both collet arrangements, thewalls 59D will move axially relative to thecollar parts 42B, causing the collet arrangements to tighten, but will also turn around theaxis 46. This will cause torque between thewalls 59D and thecollar parts 42B, and/or between thecollar parts 42B and the rebar being gripped (not shown). Neither torque is desirable and has been found to inhibit tightening, as compared to the arrangement of Fig. 2, in which torque is isolated from theinserts 42B. - It will be apparent that many variations and modifications can be made to the apparatus described above, without departing from the scope of the present invention. In particular, the various collet arrangements and arrangements for tensioning can be used in various combinations, with attachment arrangements which have collet arrangements at one or both ends and which are embedded or exposed. It is generally expected that the collet arrangements would be oppositely directed, but they could be disposed at other angles.
- Whilst endeavouring in the foregoing specification to draw attention to those features of the invention believed to be of particular importance it should be understood that the Applicant claims protection in respect of any patentable feature or combination of features hereinbefore referred to and/or shown in the drawings whether or not particular emphasis has been placed thereon.
Claims (16)
- 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.
- An arrangement according to claim 1, further including a threaded member which is threadedly movable to change the length of the passage.
- An arrangement according to claim 1 or 2, wherein the passage 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.
- An arrangement according to claim 3, wherein the taper insert has a face against which the threaded member bears when moved, to move the taper insert.
- An arrangement according to claim 4, wherein the 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 to cause the taper insert to move.
- An arrangement according to any preceding claim, wherein the tapering outer surfaces of the collar parts are substantially frusto-conical.
- An arrangement according to any preceding claim, wherein the tapering passage is substantially complementary to the outer surfaces of the collar parts, in the region by which the collar parts are engaged.
- An arrangement according to any preceding claim, wherein the collet arrangements are generally oppositely directed.
- 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.
- An arrangement according to claim 9, wherein the 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.
- An arrangement according to claim 9 or 10, wherein the tapering outer surfaces of the collar parts are substantially frusto-conical.
- An arrangement according to any of claims 9 to 11, wherein the tapering passage is substantially complementary to the outer surfaces of the collar parts, in the region by which the collar parts are engaged.
- An arrangement according to any of claims 9 to 12, wherein the arrangement further comprises 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.
- An arrangement according to claim 13, wherein the two collet arrangements are generally oppositely directed.
- An attachment arrangement substantially as described above, with reference to Figs. 2, 3 or 4 of the accompanying drawings.
- Any novel subject matter or combination including novel subject matter disclosed herein, whether or not within the scope of or relating to the same invention as any of the preceding claims.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0214929 | 2002-06-28 | ||
GB0214929A GB0214929D0 (en) | 2002-06-28 | 2002-06-28 | Connection device |
GB0217356 | 2002-07-26 | ||
GB0217356A GB0217356D0 (en) | 2002-07-26 | 2002-07-26 | Reinforced concrete bodies |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1375774A1 true EP1375774A1 (en) | 2004-01-02 |
Family
ID=27736222
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03254150A Withdrawn EP1375774A1 (en) | 2002-06-28 | 2003-06-30 | Reinforced concrete bodies |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1375774A1 (en) |
GB (1) | GB2390103B (en) |
Cited By (1)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU198093U1 (en) * | 2019-07-18 | 2020-06-17 | Игорь Николаевич Тихонов | Coupling for connecting reinforcing bars |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH138367A (en) * | 1929-05-17 | 1930-02-28 | Vontobel Robert | Coupling for wire ropes and wires. |
DD248838A1 (en) * | 1986-05-09 | 1987-08-19 | Bau Und Montagekomb Ost Betrie | MUFFENSTOSS FOR JOINING REFUGEES |
GB2255385A (en) * | 1991-05-02 | 1992-11-04 | Lin Ming Hui | A wedge-chuck connector |
DE19743416A1 (en) * | 1997-10-01 | 1999-02-25 | Behrens Josef Dipl Ing | Turnbuckle |
NL1012499C2 (en) * | 1999-07-02 | 2001-01-03 | Novitec Internat B V | Coupling component for reinforcement rod involves outer rod end cast into concrete and comprises basic part to which is fixed rod end accommodation container |
-
2003
- 2003-06-27 GB GB0315221A patent/GB2390103B/en not_active Expired - Fee Related
- 2003-06-30 EP EP03254150A patent/EP1375774A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CH138367A (en) * | 1929-05-17 | 1930-02-28 | Vontobel Robert | Coupling for wire ropes and wires. |
DD248838A1 (en) * | 1986-05-09 | 1987-08-19 | Bau Und Montagekomb Ost Betrie | MUFFENSTOSS FOR JOINING REFUGEES |
GB2255385A (en) * | 1991-05-02 | 1992-11-04 | Lin Ming Hui | A wedge-chuck connector |
DE19743416A1 (en) * | 1997-10-01 | 1999-02-25 | Behrens Josef Dipl Ing | Turnbuckle |
NL1012499C2 (en) * | 1999-07-02 | 2001-01-03 | Novitec Internat B V | Coupling component for reinforcement rod involves outer rod end cast into concrete and comprises basic part to which is fixed rod end accommodation container |
Cited By (2)
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 |
---|---|
GB2390103A (en) | 2003-12-31 |
GB0315221D0 (en) | 2003-08-06 |
GB2390103B (en) | 2006-03-22 |
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