EP4180589A1 - Rebar coupler with locking nut - Google Patents

Rebar coupler with locking nut Download PDF

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Publication number
EP4180589A1
EP4180589A1 EP21207743.2A EP21207743A EP4180589A1 EP 4180589 A1 EP4180589 A1 EP 4180589A1 EP 21207743 A EP21207743 A EP 21207743A EP 4180589 A1 EP4180589 A1 EP 4180589A1
Authority
EP
European Patent Office
Prior art keywords
rebar
sleeve
locking nut
socket
locking
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Withdrawn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
EP21207743.2A
Other languages
German (de)
French (fr)
Inventor
Matteo Spampatti
Michael Ziltener
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Priority to EP21207743.2A priority Critical patent/EP4180589A1/en
Publication of EP4180589A1 publication Critical patent/EP4180589A1/en
Withdrawn legal-status Critical Current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 invention relates to a rebar coupler arrangement according to the preamble of claim 1.
  • An arrangement of this type comprises a rebar coupler, which comprises a first socket for receiving a first rebar and a second socket for receiving a second rebar, wherein the first socket comprises a first sleeve and at least one first locking element that is, at least partly, arranged within the first sleeve, wherein the first sleeve has first wedge surface, which tapers towards a mouth of the first sleeve, for wedging the first locking element against the first rebar when the first rebar is arranged within the first sleeve.
  • KR102202667 B1 discloses a rebar coupler arrangement comprising fixing nuts that are each provided with tapering bores. When tightened, the taper of the respective fixing nuts wedges fixing elements against rebars received in the respective channels.
  • EP3783235 A1 , EP3783234 A1 and EP3783233 A1 disclose quick acting threaded rod connectors, which are intended to catch a threaded rod when the threaded rod is axially inserted into the connectors.
  • the connectors each comprise a broken ring-shaped locking element that is wedged against the threaded rod by a tapering wedge surface.
  • European patent application with filing number 21187659.4 describes quick acting threaded rod connectors which are each able to receive different size threaded rods.
  • the rebar coupler arrangement comprises a first puller for biasing the first rebar arranged withing the first sleeve out of the first sleeve, out of the first socket and/or out of the rebar coupler.
  • a first basic idea of the invention might be seen in providing a first puller that can be used for biasing the first rebar out of the first sleeve, out of the first socket and/or out of the rebar coupler after the first rebar has been plugged into the first socket, thereby locking the lock mechanism provided by the first looking element and the first wedge surface, and thereby absorbing any slack of the lock mechanism. Accordingly, pre-tension can be provided in order to counteract slip and displacement of the locking mechanism.
  • the first puller is intended to pullingly act on the first rebar, i.e. to apply tension onto the first rebar.
  • the first sleeve and/or the second sleeve preferably comprise a metal material.
  • the first sleeve and the second sleeve are connected, so as to connect the first rebar received within the first sleeve to the second rebar received in the second sleeve.
  • the first wedge surface faces the first locking element.
  • the first wedge surface tapers towards the mouth of the first socket, which means that the first wedge surface converges with the axis of the first sleeve as it approaches the mouth of the first sleeve.
  • the mouth of the first sleeve surrounds an insertion opening for inserting the first rebar into the first sleeve.
  • the first wedge element can have any suitable design. For example, it can have a wedge shape or a ball shape, or it can be continuous-ring-shaped or broken-ring-shaped.
  • the first socket might also have a plurality of first locking elements, which might be interconnected or separate.
  • the first wedge element preferably consists of a metal material.
  • the first wedge element can be embedded in a cage, in particular a plastic material cage, for positioning the first wedge element.
  • a cage can be particularly advantageous if there are provided a plurality of first wedge elements.
  • the first wedge element may be provided with an internal screw thread that is intended to mate with the external screw thread of the first rebar.
  • the first wedge element may be provided with a roughened surface for engaging the first rebar.
  • the first wedge element might be configured for receiving rebars of different sizes, for example by configuring it with a surface roughness in analogy to that described in European patent application with filing number 21187659.4 .
  • the first rebar and/or the second rebar can be considered to be parts of the rebar coupler arrangement.
  • the rebar coupler arrangement and the rebars can be considered to be separate parts.
  • the first puller could provide a linear mechanism, such as a crank mechanism, for pullingly biasing the first rebar.
  • the first puller is a first locking nut having a first rebar engagement screw thread for screwingly engaging the first rebar, and a first sleeve abutment surface for abutting against the first sleeve, in particular against the mouth of the first sleeve.
  • the first locking nut is screwingly positioned on the first rebar.
  • the first locking nut pulls the first rebar out of the first sleeve, thereby locking the lock mechanism provided by the first looking element and the first wedge surface, and thereby absorbing any slack of the lock mechanism. Accordingly, pre-tension can be provided in order to counteract slip and displacement of the locking mechanism, and this can be achieved in a particular easy and reliable manner.
  • the first rebar engagement screw thread is an internal screw thread, i.e. it comprises a generally helical depression, broken or non-broken, that is able to receive the screw thread of the first rebar.
  • the first locking nut preferably consists of a metal material, in particular steel, which might be optionally coated.
  • the first sleeve abutment surface forms a face of the first locking nut and is preferably generally flat.
  • the first locking nut is preferably provided with a first drive surface for imparting torque on the first locking nut; this first drive surface can for example be a polygonal surface, more preferably a six-flat surface.
  • the first locking nut might be provided with an element that gives feedback to the installer when intended pre-tensioning is achieved (for example a torque limiting nut feature).
  • the second socket comprises a second sleeve and at least one second locking element that is, at least partly, arranged within the second sleeve, wherein the second sleeve has second wedge surface, which tapers towards a mouth of the second sleeve, for wedging the second locking element against the second rebar when the second rebar is arranged within the second sleeve.
  • the rebar coupler arrangement further comprises a second puller for biasing the second rebar arranged withing the second sleeve out of the second sleeve, out of the second socket and/or out of the rebar coupler.
  • the second puller is a second locking nut having a second rebar engagement screw thread for screwingly engaging the second rebar, and a second sleeve abutment surface for abutting against the second sleeve, in particular against the mouth of the second sleeve.
  • the second side of the rebar coupler arrangement is configured in analogy to the first side, which can further improve performance in particularly easy manner.
  • the second puller is intended to pullingly act on the second rebar, i.e. to apply tension onto the second rebar.
  • the second wedge surface faces the second locking element.
  • the second wedge surface tapers towards the mouth of the second socket, which means that the second wedge surface converges with the axis of the second sleeve as it approaches the mouth of the second sleeve.
  • the mouth of the second sleeve surrounds an insertion opening for inserting the second rebar into the second sleeve.
  • the second wedge element can have any suitable design. For example, it can have a wedge shape or a ball shape, or it can be continuous-ring-shaped or broken-ring-shaped.
  • the second socket might also have a plurality of second locking elements, which might be interconnected or separate.
  • the second wedge element preferably consists of a metal material.
  • the second wedge element can be embedded in a cage, in particular a plastic material cage, for positioning the second wedge element.
  • a cage can be particularly advantageous if there are provided a plurality of second wedge elements.
  • the second wedge element may be provided with an internal screw thread that is intended to mate with the external screw thread of the second rebar.
  • the second wedge element may be provided with a roughened surface for engaging the second rebar.
  • the second wedge element might be configured for receiving rebars of different sizes, for example by configuring it with a surface roughness in analogy to that described in European patent application with filing number 21187659.4 .
  • the second rebar engagement screw thread is an internal screw thread, i.e. it comprises a generally helical depression, broken or non-broken, that is able to receive the screw thread of the second rebar.
  • the second locking nut preferably consists of a metal material, in particular steel, which might be optionally coated.
  • the second sleeve abutment surface forms a face of the second locking nut and is preferably generally flat.
  • the second locking nut is preferably provided with a second drive surface for imparting torque on the second locking nut; this second drive surface can for example be a polygonal surface, more preferably a six-flat surface.
  • the second locking nut might be provided with an element that gives feedback to the installer when intended pre-tensioning is achieved (for example a torque limiting nut feature).
  • the invention also relates to a method of using a described rebar coupler arrangement, in which:
  • the rebar coupler arrangement is used as intended.
  • FIG. 1 An example of a rebar coupler arrangement comprising a rebar coupler 9 is shown in figures 1 to 3 , wherein figures 1 to 3 illustrate subsequent stages of a method for using said arrangement.
  • the rebar coupler 9 is intended to connect a first rebar 1 to a second rebar 2, and comprises a first socket 10 for receiving an end of the first rebar 1 and a second socket 20 for receiving an end of the second rebar 2, wherein the first socket 10 and the second socket 20 open into opposite directions.
  • the first socket 10 comprises a first sleeve 11
  • the second socket 20 comprises a second sleeve 21, wherein the first sleeve 11 and the second sleeve 21 are interconnected.
  • the first sleeve 11 and the second sleeve 21 are directly interconnected.
  • first sleeve 11 could also be one piece with the second sleeve 21, or the first sleeve 11 and the second sleeve 21 could be indirectly interconnected, for example by means of a pipe coupler, preferentially a threaded pipe coupler.
  • the first sleeve 11 has a first bore 19, and the second sleeve 21 has a second bore 29.
  • the first bore 19 and the second bore 29 are arranged in co-axial relationship.
  • the first bore 19 and the second bore 29 merge into one another and form a through hole.
  • the first bore 19 and the second bore 29 could also be blind holes each.
  • the first sleeve 11 and/or the second sleeve 21 have generally circular cylindrical outline. This, however, is an example only, and other shapes are also possible.
  • the first sleeve 11 has a mouth 18 and the second sleeve 21 has a mouth 28.
  • the mouth 18 is an open face of the first sleeve 11, which opens into the first bore 19
  • the mouth 28 is an open face of the second sleeve 21, which opens into the second bore 29.
  • the first socket 10 further comprises a first locking element 15, which is arranged within the first sleeve 11, namely within the first bore 19.
  • the first locking element 15 is, by way of example, a wedge arranged in a cage.
  • the second socket 20 comprises a second locking element 25, which is arranged within the second sleeve 21, namely within the second bore 29.
  • the second locking element 25 is, by way of example, a wedge arranged in a cage.
  • the first sleeve 11 has a first wedge surface 17, which faces the first bore 19, and which tapers towards the mouth 18 of the first sleeve 11.
  • the first wedge surface 17 is angled with respect to the axis of the first bore 19, so as to wedge the first locking element 15 towards the first rebar 1 when plugged into the first sleeve 11 as the first rebar 1 is pulled out of the first sleeve 11.
  • the first wedge surface 17 is frustoconical, which is, however, an example only.
  • the second sleeve 21 has second wedge surface 27, which faces the second bore 29, and which tapers towards the mouth 28 of the second sleeve 21.
  • the second wedge surface 27 is angled with respect to the axis of the second bore 29, so as to wedge the second locking element 25 towards the second rebar 2 when plugged into the second sleeve 21 as the second rebar 2 is pulled out of the second sleeve 21.
  • the second wedge surface 27 is frustoconical, which is, however, an example only.
  • a spring 90 is arranged between the first locking element 15 and the second locking element 25, which biases the first locking element 15 towards the mouth 18 of the first sleeve 11 and the second locking element 25 towards the mouth 28 of the second sleeve 21.
  • the rebar coupler arrangement further comprises a first locking nut 50.
  • the first locking nut 50 has a first rebar engagement screw thread 51, i.e. an internal screw thread, which is intended to screwingly engage the external rebar thread 3 of the first rebar 1.
  • the first locking nut 50 further has a first sleeve abutment surface 53 for abutting against the first sleeve 11, in particular against the mouth 18 thereof.
  • the first locking nut 50 further comprises a first drive surface 59 for rotationally engaging and driving the first locking nut 50.
  • the first drive surface 59 is a hex nut structure, but this is exemplary only.
  • the rebar coupler arrangement further comprises a second locking nut 60.
  • the second locking nut 60 has a second rebar engagement screw thread 61, i.e. an internal screw thread, which is intended to screwingly engage the external rebar thread 4 of the second rebar 2.
  • the second locking nut 60 further has a second sleeve abutment surface 63 for abutting against the second sleeve 21, in particular against the mouth 28 thereof.
  • the second locking nut 60 further comprises a second drive surface 69 for rotationally engaging and driving the second locking nut 60.
  • the second drive surface 69 is a hex nut structure, but this is exemplary only.
  • the first locking nut 50 When used as intended, the first locking nut 50 is screwed onto the first rebar 1, leading to the configuration shown in figure 1 . An end of the first rebar 1 is then plugged into the first sleeve 11, thereby causing engagement of the first rebar 1 by the first locking element 15. The first locking nut 50 is then tightened, and abutment of the first sleeve abutment surface 53 against the first sleeve 11, as shown in figure 2 , causes the first rebar 1 to be biased out of the first sleeve 11, so that any possible slack of the first locking element 15 is reduced or eliminated, leading to the configuration shown in figure 3 .
  • the second locking nut 60 is screwed onto the second rebar 2, leading to the configuration shown in figure 1 .
  • An end of the second rebar 2 is then plugged into the second sleeve 21, thereby causing engagement of the second rebar 2 by the second locking element 25.
  • the second locking nut 60 is then tightened, and abutment of the second sleeve abutment surface 63 against the second sleeve 21, as shown in figure 2 , causes the second rebar 2 to be biased out of the second sleeve 21, so that any possible slack of the second locking element 25 is reduced or eliminated, leading to the configuration shown in figure 3 .

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)

Abstract

The invention relates to a rebar coupler arrangement comprising a rebar coupler, which comprises a first socket for receiving a first rebar and a second socket for receiving a second rebar, wherein the first socket comprises a first sleeve and at least one first locking element that is, at least partly, arranged within the first sleeve, wherein the first sleeve has first wedge surface, which tapers towards a mouth of the first sleeve, for wedging the first locking element against the first rebar when the first rebar is arranged within the first sleeve, wherein the rebar coupler arrangement further comprises a first puller for biasing the first rebar arranged withing the first sleeve out of the first sleeve.

Description

  • The invention relates to a rebar coupler arrangement according to the preamble of claim 1. An arrangement of this type comprises a rebar coupler, which comprises a first socket for receiving a first rebar and a second socket for receiving a second rebar, wherein the first socket comprises a first sleeve and at least one first locking element that is, at least partly, arranged within the first sleeve, wherein the first sleeve has first wedge surface, which tapers towards a mouth of the first sleeve, for wedging the first locking element against the first rebar when the first rebar is arranged within the first sleeve.
  • KR102202667 B1 discloses a rebar coupler arrangement comprising fixing nuts that are each provided with tapering bores. When tightened, the taper of the respective fixing nuts wedges fixing elements against rebars received in the respective channels.
  • EP3783235 A1 , EP3783234 A1 and EP3783233 A1 disclose quick acting threaded rod connectors, which are intended to catch a threaded rod when the threaded rod is axially inserted into the connectors. The connectors each comprise a broken ring-shaped locking element that is wedged against the threaded rod by a tapering wedge surface.
  • European patent application with filing number 21187659.4 describes quick acting threaded rod connectors which are each able to receive different size threaded rods.
  • It is an object of the invention to provide a rebar coupler arrangement and a method of using it which, at low manufacturing and handling effort, provide particularly good performance, in particular in seismic conditions.
  • This object is achieved by a rebar coupler arrangement according to claim 1. Dependent claims refer to preferred embodiments of the invention.
  • According to the invention, the rebar coupler arrangement comprises a first puller for biasing the first rebar arranged withing the first sleeve out of the first sleeve, out of the first socket and/or out of the rebar coupler.
  • A first basic idea of the invention might be seen in providing a first puller that can be used for biasing the first rebar out of the first sleeve, out of the first socket and/or out of the rebar coupler after the first rebar has been plugged into the first socket, thereby locking the lock mechanism provided by the first looking element and the first wedge surface, and thereby absorbing any slack of the lock mechanism. Accordingly, pre-tension can be provided in order to counteract slip and displacement of the locking mechanism.
  • The first puller is intended to pullingly act on the first rebar, i.e. to apply tension onto the first rebar.
  • The first sleeve and/or the second sleeve preferably comprise a metal material. The first sleeve and the second sleeve are connected, so as to connect the first rebar received within the first sleeve to the second rebar received in the second sleeve.
  • The first wedge surface faces the first locking element. The first wedge surface tapers towards the mouth of the first socket, which means that the first wedge surface converges with the axis of the first sleeve as it approaches the mouth of the first sleeve. The mouth of the first sleeve surrounds an insertion opening for inserting the first rebar into the first sleeve. The first wedge element can have any suitable design. For example, it can have a wedge shape or a ball shape, or it can be continuous-ring-shaped or broken-ring-shaped. The first socket might also have a plurality of first locking elements, which might be interconnected or separate. The first wedge element preferably consists of a metal material. The first wedge element can be embedded in a cage, in particular a plastic material cage, for positioning the first wedge element. A cage can be particularly advantageous if there are provided a plurality of first wedge elements. The first wedge element may be provided with an internal screw thread that is intended to mate with the external screw thread of the first rebar. Alternatively or additionally, the first wedge element may be provided with a roughened surface for engaging the first rebar. The first wedge element might be configured for receiving rebars of different sizes, for example by configuring it with a surface roughness in analogy to that described in European patent application with filing number 21187659.4 .
  • The first rebar and/or the second rebar can be considered to be parts of the rebar coupler arrangement. Alternatively, the rebar coupler arrangement and the rebars can be considered to be separate parts.
  • The first puller could provide a linear mechanism, such as a crank mechanism, for pullingly biasing the first rebar. Preferably, however, the first puller is a first locking nut having a first rebar engagement screw thread for screwingly engaging the first rebar, and a first sleeve abutment surface for abutting against the first sleeve, in particular against the mouth of the first sleeve. The first locking nut is screwingly positioned on the first rebar. When the first rebar is plugged into the first sleeve and the first locking nut is subsequently tightened against the first sleeve, the first locking nut pulls the first rebar out of the first sleeve, thereby locking the lock mechanism provided by the first looking element and the first wedge surface, and thereby absorbing any slack of the lock mechanism. Accordingly, pre-tension can be provided in order to counteract slip and displacement of the locking mechanism, and this can be achieved in a particular easy and reliable manner.
  • The first rebar engagement screw thread is an internal screw thread, i.e. it comprises a generally helical depression, broken or non-broken, that is able to receive the screw thread of the first rebar.
  • The first locking nut preferably consists of a metal material, in particular steel, which might be optionally coated. The first sleeve abutment surface forms a face of the first locking nut and is preferably generally flat. The first locking nut is preferably provided with a first drive surface for imparting torque on the first locking nut; this first drive surface can for example be a polygonal surface, more preferably a six-flat surface. The first locking nut might be provided with an element that gives feedback to the installer when intended pre-tensioning is achieved (for example a torque limiting nut feature).
  • It is particularly preferred that the second socket comprises a second sleeve and at least one second locking element that is, at least partly, arranged within the second sleeve, wherein the second sleeve has second wedge surface, which tapers towards a mouth of the second sleeve, for wedging the second locking element against the second rebar when the second rebar is arranged within the second sleeve. Preferentially, the rebar coupler arrangement further comprises a second puller for biasing the second rebar arranged withing the second sleeve out of the second sleeve, out of the second socket and/or out of the rebar coupler.
  • Preferably, the second puller is a second locking nut having a second rebar engagement screw thread for screwingly engaging the second rebar, and a second sleeve abutment surface for abutting against the second sleeve, in particular against the mouth of the second sleeve. Accordingly, the second side of the rebar coupler arrangement is configured in analogy to the first side, which can further improve performance in particularly easy manner. The second puller is intended to pullingly act on the second rebar, i.e. to apply tension onto the second rebar.
  • The second wedge surface faces the second locking element. The second wedge surface tapers towards the mouth of the second socket, which means that the second wedge surface converges with the axis of the second sleeve as it approaches the mouth of the second sleeve. The mouth of the second sleeve surrounds an insertion opening for inserting the second rebar into the second sleeve. The second wedge element can have any suitable design. For example, it can have a wedge shape or a ball shape, or it can be continuous-ring-shaped or broken-ring-shaped. The second socket might also have a plurality of second locking elements, which might be interconnected or separate. The second wedge element preferably consists of a metal material. The second wedge element can be embedded in a cage, in particular a plastic material cage, for positioning the second wedge element. A cage can be particularly advantageous if there are provided a plurality of second wedge elements. The second wedge element may be provided with an internal screw thread that is intended to mate with the external screw thread of the second rebar. Alternatively or additionally, the second wedge element may be provided with a roughened surface for engaging the second rebar. The second wedge element might be configured for receiving rebars of different sizes, for example by configuring it with a surface roughness in analogy to that described in European patent application with filing number 21187659.4 .
  • The second rebar engagement screw thread is an internal screw thread, i.e. it comprises a generally helical depression, broken or non-broken, that is able to receive the screw thread of the second rebar.
  • The second locking nut preferably consists of a metal material, in particular steel, which might be optionally coated. The second sleeve abutment surface forms a face of the second locking nut and is preferably generally flat. The second locking nut is preferably provided with a second drive surface for imparting torque on the second locking nut; this second drive surface can for example be a polygonal surface, more preferably a six-flat surface. The second locking nut might be provided with an element that gives feedback to the installer when intended pre-tensioning is achieved (for example a torque limiting nut feature).
  • The invention also relates to a method of using a described rebar coupler arrangement, in which:
    • the first locking nut is placed on the first rebar,
    • the first rebar is plugged into the first socket, so that the first locking element engages the first rebar,
    • the first locking nut is subsequently tightened against the mouth of the first sleeve.
  • Accordingly, the rebar coupler arrangement is used as intended.
  • Preferably,
    • the second locking nut is placed on the second rebar,
    • the second rebar is plugged into the second socket, so that the second locking element engages the second rebar,
    • the second locking nut is subsequently tightened against the mouth of the second sleeve.
  • Features that are described here in connection with the rebar coupler arrangement can also be used in connection with the method, and features that are described here in connection with the method can also be used in connection with the rebar coupler arrangement.
  • The invention is explained in greater detail below with reference to preferred exemplary embodiments, which are depicted schematically in the accompanying drawings. Individual features of the exemplary embodiments presented below can be implemented either individually or in any combination within the scope of the present invention.
  • An example of a rebar coupler arrangement comprising a rebar coupler 9 is shown in figures 1 to 3, wherein figures 1 to 3 illustrate subsequent stages of a method for using said arrangement.
  • The rebar coupler 9 is intended to connect a first rebar 1 to a second rebar 2, and comprises a first socket 10 for receiving an end of the first rebar 1 and a second socket 20 for receiving an end of the second rebar 2, wherein the first socket 10 and the second socket 20 open into opposite directions.
  • The first socket 10 comprises a first sleeve 11, and the second socket 20 comprises a second sleeve 21, wherein the first sleeve 11 and the second sleeve 21 are interconnected. In the present embodiment, the first sleeve 11 and the second sleeve 21 are directly interconnected.
  • However, direct interconnected is an example only, and the first sleeve 11 could also be one piece with the second sleeve 21, or the first sleeve 11 and the second sleeve 21 could be indirectly interconnected, for example by means of a pipe coupler, preferentially a threaded pipe coupler.
  • The first sleeve 11 has a first bore 19, and the second sleeve 21 has a second bore 29. The first bore 19 and the second bore 29 are arranged in co-axial relationship. In the present embodiment, the first bore 19 and the second bore 29 merge into one another and form a through hole. However, this is an example only, and the first bore 19 and the second bore 29 could also be blind holes each. In the present embodiment, the first sleeve 11 and/or the second sleeve 21 have generally circular cylindrical outline. This, however, is an example only, and other shapes are also possible.
  • The first sleeve 11 has a mouth 18 and the second sleeve 21 has a mouth 28. The mouth 18 is an open face of the first sleeve 11, which opens into the first bore 19, and the mouth 28 is an open face of the second sleeve 21, which opens into the second bore 29.
  • The first socket 10 further comprises a first locking element 15, which is arranged within the first sleeve 11, namely within the first bore 19. In the present embodiment, the first locking element 15 is, by way of example, a wedge arranged in a cage. In analogy, the second socket 20 comprises a second locking element 25, which is arranged within the second sleeve 21, namely within the second bore 29. In the present embodiment, the second locking element 25 is, by way of example, a wedge arranged in a cage.
  • The first sleeve 11 has a first wedge surface 17, which faces the first bore 19, and which tapers towards the mouth 18 of the first sleeve 11. The first wedge surface 17 is angled with respect to the axis of the first bore 19, so as to wedge the first locking element 15 towards the first rebar 1 when plugged into the first sleeve 11 as the first rebar 1 is pulled out of the first sleeve 11. In the present embodiment, the first wedge surface 17 is frustoconical, which is, however, an example only.
  • The second sleeve 21 has second wedge surface 27, which faces the second bore 29, and which tapers towards the mouth 28 of the second sleeve 21. The second wedge surface 27 is angled with respect to the axis of the second bore 29, so as to wedge the second locking element 25 towards the second rebar 2 when plugged into the second sleeve 21 as the second rebar 2 is pulled out of the second sleeve 21. In the present embodiment, the second wedge surface 27 is frustoconical, which is, however, an example only.
  • The first wedge surface 17 of the first sleeve 11 and the second wedge surface 27 of the second sleeve 21, respectively, taper into opposite directions.
  • A spring 90 is arranged between the first locking element 15 and the second locking element 25, which biases the first locking element 15 towards the mouth 18 of the first sleeve 11 and the second locking element 25 towards the mouth 28 of the second sleeve 21.
  • The rebar coupler arrangement further comprises a first locking nut 50. The first locking nut 50 has a first rebar engagement screw thread 51, i.e. an internal screw thread, which is intended to screwingly engage the external rebar thread 3 of the first rebar 1. The first locking nut 50 further has a first sleeve abutment surface 53 for abutting against the first sleeve 11, in particular against the mouth 18 thereof. The first locking nut 50 further comprises a first drive surface 59 for rotationally engaging and driving the first locking nut 50. In the present embodiment, the first drive surface 59 is a hex nut structure, but this is exemplary only.
  • The rebar coupler arrangement further comprises a second locking nut 60. The second locking nut 60 has a second rebar engagement screw thread 61, i.e. an internal screw thread, which is intended to screwingly engage the external rebar thread 4 of the second rebar 2. The second locking nut 60 further has a second sleeve abutment surface 63 for abutting against the second sleeve 21, in particular against the mouth 28 thereof. The second locking nut 60 further comprises a second drive surface 69 for rotationally engaging and driving the second locking nut 60. In the present embodiment, the second drive surface 69 is a hex nut structure, but this is exemplary only.
  • When used as intended, the first locking nut 50 is screwed onto the first rebar 1, leading to the configuration shown in figure 1. An end of the first rebar 1 is then plugged into the first sleeve 11, thereby causing engagement of the first rebar 1 by the first locking element 15. The first locking nut 50 is then tightened, and abutment of the first sleeve abutment surface 53 against the first sleeve 11, as shown in figure 2, causes the first rebar 1 to be biased out of the first sleeve 11, so that any possible slack of the first locking element 15 is reduced or eliminated, leading to the configuration shown in figure 3. In analogy, the second locking nut 60 is screwed onto the second rebar 2, leading to the configuration shown in figure 1. An end of the second rebar 2 is then plugged into the second sleeve 21, thereby causing engagement of the second rebar 2 by the second locking element 25. The second locking nut 60 is then tightened, and abutment of the second sleeve abutment surface 63 against the second sleeve 21, as shown in figure 2, causes the second rebar 2 to be biased out of the second sleeve 21, so that any possible slack of the second locking element 25 is reduced or eliminated, leading to the configuration shown in figure 3.
  • Accordingly, by applying a torque on locking nuts 50, 60, displacement of the rebars 1, 2 will be reduced, allowing to have a tight connection, increasing the stiffness of the system.

Claims (7)

  1. Rebar coupler arrangement comprising
    a rebar coupler (9), which comprises a first socket (10) for receiving a first rebar (1) and a second socket (20) for receiving a second rebar (2), wherein the first socket (10) comprises a first sleeve (11) and at least one first locking element (15) that is, at least partly, arranged within the first sleeve (11), wherein the first sleeve (11) has first wedge surface (17), which tapers towards a mouth (18) of the first sleeve (11), for wedging the first locking element (15) against the first rebar (1) when the first rebar (1) is arranged within the first sleeve (11),
    characterized in that
    - the rebar coupler arrangement further comprises a first puller for biasing the first rebar (1) arranged withing the first sleeve (11) out of the first sleeve (11).
  2. Rebar coupler arrangement according to claim 1,
    characterized in that
    - the first puller is a first locking nut (50) having a first rebar engagement screw thread (51) for screwingly engaging the first rebar (1), and a first sleeve abutment surface (53) for abutting against the first sleeve (11).
  3. Rebar coupler arrangement according to any of the proceeding claims,
    characterized in that
    the second socket (20) comprises a second sleeve (21) and at least one second locking element (25) that is, at least partly, arranged within the second sleeve (21), wherein the second sleeve (21) has second wedge surface (27), which tapers towards a mouth (28) of the second sleeve (21), for wedging the second locking element (25) against the second rebar (2) when the second rebar (2) is arranged within the second sleeve (21).
  4. Rebar coupler arrangement according to claim 3,
    characterized in that
    the rebar coupler arrangement further comprises a second puller for biasing the second rebar (2) arranged withing the second sleeve (21) out of the second sleeve (21).
  5. Rebar coupler arrangement according to claim 4,
    characterized in that
    the second puller is a second locking nut (60) having a second rebar engagement screw thread (61) for screwingly engaging the second rebar (2), and a second sleeve abutment surface (63) for abutting against the second sleeve (21).
  6. Method of using a rebar coupler arrangement according to claim 2,
    characterized in that
    - the first locking nut (50) is placed on the first rebar (1),
    - the first rebar (1) is plugged into the first socket (10), so that the first locking element (15) engages the first rebar (1),
    - the first locking nut (50) is subsequently tightened against the mouth (18) of the first sleeve (11).
  7. Method according to claim 6,
    characterized in that
    - the rebar coupler arrangement is provided in accordance with claim 5,
    - the second locking nut (60) is placed on the second rebar (2),
    - the second rebar (2) is plugged into the second socket (20), so that the second locking element (25) engages the second rebar (2),
    - the second locking nut (60) is subsequently tightened against the mouth (28) of the second sleeve (21).
EP21207743.2A 2021-11-11 2021-11-11 Rebar coupler with locking nut Withdrawn EP4180589A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21207743.2A EP4180589A1 (en) 2021-11-11 2021-11-11 Rebar coupler with locking nut

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21207743.2A EP4180589A1 (en) 2021-11-11 2021-11-11 Rebar coupler with locking nut

Publications (1)

Publication Number Publication Date
EP4180589A1 true EP4180589A1 (en) 2023-05-17

Family

ID=78820617

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21207743.2A Withdrawn EP4180589A1 (en) 2021-11-11 2021-11-11 Rebar coupler with locking nut

Country Status (1)

Country Link
EP (1) EP4180589A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110042989A (en) * 2019-05-28 2019-07-23 上海易拼利联建筑科技有限责任公司 A kind of deviation reinforcing bar cone-shaped clip quick connector
KR102202667B1 (en) 2020-04-07 2021-01-13 주식회사 엔씨 non-slip steel bar reinforcement coupler
EP3783233A1 (en) 2019-08-21 2021-02-24 Hilti Aktiengesellschaft Threaded rod connector with mouthwardly projecting arms
EP3783234A1 (en) 2019-08-21 2021-02-24 Hilti Aktiengesellschaft Threaded rod connector with rotationally locked collar
EP3783235A1 (en) 2019-08-21 2021-02-24 Hilti Aktiengesellschaft Connector insert with rod accommodation hole

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110042989A (en) * 2019-05-28 2019-07-23 上海易拼利联建筑科技有限责任公司 A kind of deviation reinforcing bar cone-shaped clip quick connector
EP3783233A1 (en) 2019-08-21 2021-02-24 Hilti Aktiengesellschaft Threaded rod connector with mouthwardly projecting arms
EP3783234A1 (en) 2019-08-21 2021-02-24 Hilti Aktiengesellschaft Threaded rod connector with rotationally locked collar
EP3783235A1 (en) 2019-08-21 2021-02-24 Hilti Aktiengesellschaft Connector insert with rod accommodation hole
KR102202667B1 (en) 2020-04-07 2021-01-13 주식회사 엔씨 non-slip steel bar reinforcement coupler

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