EP4015733A1 - Koppler - Google Patents

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Publication number
EP4015733A1
EP4015733A1 EP20215469.6A EP20215469A EP4015733A1 EP 4015733 A1 EP4015733 A1 EP 4015733A1 EP 20215469 A EP20215469 A EP 20215469A EP 4015733 A1 EP4015733 A1 EP 4015733A1
Authority
EP
European Patent Office
Prior art keywords
coupling element
coupler according
end portion
load
coupling
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Withdrawn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
EP20215469.6A
Other languages
English (en)
French (fr)
Inventor
Claudio Hasler
Thomas Foser
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 EP20215469.6A priority Critical patent/EP4015733A1/de
Publication of EP4015733A1 publication Critical patent/EP4015733A1/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Withdrawn legal-status Critical Current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

  • Described herein is a coupler for coupling a first elongated element having a first end portion to a second elongated element having a second end portion, and associated parts thereof.
  • the coupler may include a thread in order to achieve coupling.
  • the reinforced concrete may be subjected to some applied loading which will place the coupled reinforcing bar into a state of axial stress. For example, under loading imposed by a large earthquake, a concrete element may become cracked and deformed. This may require the coupled reinforcing bar to stretch to a high level of plastic strain. The coupling device will then be required to have sufficient capacity to resist the full range of likely stresses and strains that may be imparted when in use.
  • a reinforcing bar needs to be coupled to another reinforcing bar which is already cast in, for example if a concrete element is to be attached to a pre-existing concrete element. It is known to provide the reinforcing bar in the pre-existing wall element with a coupling element having a female thread, and to provide a reinforcing bar with a male thread fitting to the female thread. The reinforcing bar with the male thread may then be screwed into the female thread which may be rather exhausting due to the length and weight of the reinforcing bar which needs to be turned as a whole.
  • a coupler for coupling a first elongated element having a first end portion to a second elongated element having a second end portion comprising a first coupling element and a second coupling element
  • the first coupling element comprises a first attachment portion for attaching the first coupling element to the first end portion, and a screw portion having a male thread
  • the second coupling element comprises a second attachment portion for attaching the second coupling element to the second end portion, and a nut portion having a female thread fitting on the male thread, thereby fastening the first coupling element to the second coupling element, wherein the male thread comprises two or more individual threads.
  • the screw portion tapers towards the second coupling element.
  • the female thread then tapers away from the first coupling element.
  • Such a configuration may further reduce a duration necessary for screwing the first elongated element into the nut portion.
  • a frustoconical shape of the screw portion is preferred, even more if the frustoconical shape of the screw portion has a cone angle a between 10° and 20°.
  • the male thread and the female thread are self-locking. In this way, time-consuming steps of checking a proper connection between the first coupling element and the second coupling element may be reduced.
  • the first attachment portion comprises a first wall enclosing a first receptacle for receiving the first end portion.
  • the first receptacle has a first receiving diameter and the male thread has a male thread diameter greater than the first receiving diameter. This may avoid creating a weak portion by reducing the diameter of load-transmitting parts.
  • the first coupling element comprises a first load-transmission element transmitting mechanical load from the first elongate element to the first coupling element.
  • the first load-transmission element comprises at least one of a stud, a nail and a screw.
  • the second attachment portion comprises a second wall enclosing a second receptacle for receiving the second end portion.
  • the second receptacle has a second receiving diameter and the female thread has a female thread diameter greater than the second receiving diameter.
  • the second coupling element comprises a second load-transmission element transmitting mechanical load from the second elongate element to the second coupling element.
  • the second load-transmission element comprises at least one of a stud, a nail and a screw.
  • At least one of the first elongated element, the second elongated element, the first coupling element, the second coupling element, the first load-transmission element, and the second load-transmission element comprises a metallic material, or an alloy, or steel.
  • the first and second elongated elements each comprises a reinforcement bar.
  • Figs. 1 shows a coupler 100 for coupling a first elongated element 101 formed as a reinforcement bar and having a first end portion 102 to a second elongated element 103 likewise formed as a reinforcement bar and having a second end portion 104.
  • the coupler 100 comprises a first coupling element 110 and a second coupling element 140.
  • the first coupling element 110 comprises a first attachment portion 120 and a screw portion 130.
  • the first attachment portion 120 comprises a first wall 121 enclosing a first receptacle 122 in which the first end portion 102 is received.
  • the first coupling element 110 For attaching the first coupling element 110 to the first end portion 102, the first coupling element 110 comprises a plurality of first load-transmission elements 125 formed as nails which are driven into a gap between the first end portion 102 and the first wall 121 for transmitting mechanical load from the first elongate element 101 to the first coupling element 110.
  • the second coupling element 140 comprises a second attachment portion 150 and a nut portion 160.
  • the second attachment portion 150 comprises a second wall 151 enclosing a second receptacle (not shown) in which the second end portion 104 is received.
  • the second coupling element 140 For attaching the second coupling element 140 to the second end portion 104, the second coupling element 140 comprises a plurality of second load-transmission elements 155 formed as nails which are driven into a gap between the second end portion 104 and the second wall 151 for transmitting mechanical load from the second elongate element 103 to the second coupling element 140.
  • some or all of the first and second load-transmission elements are formed as studs or screws and are driven tangentially or radially onto the first end portion.
  • the screw portion 130 comprises a male thread 170 tapering towards the second coupling element 140.
  • the nut portion 160 comprises a female thread 180 tapering away from the first coupling element 110 and fitting on the male thread 170 in a self-locking manner. In this way, easy fastening the first coupling element 110 to the second coupling element 140 is possible by screwing the screw portion 130 into the nut portion 160.
  • the male thread 170 has a male thread diameter which is greater than a first receiving diameter of the first receptacle and thus the first elongated element 101.
  • the female thread 180 has a female thread diameter which is greater than a second receiving diameter of the second receptacle and thus the second elongated element 103. In this way, the screw portion 130 and the nut portion 160 are avoided to be the weakest portions of the overall connection or reinforcement between the first and second elongated elements 101, 103 when the screw portion 130 is screwed to the nut portion 160.
  • the first elongated element 101, the second elongated element 103, the first coupling element 110, the second coupling element 140, the first load-transmission elements 125, and the second load-transmission elements 155 are made of an alloy, such as steel.
  • the second coupling element 140 may be attached to the second elongate element 103 by inserting the second end portion 104 into the second receptacle 152 and driving the plurality of second load-transmission elements 155 through the second wall 151 onto the second end portion 104.
  • the second elongate element 103 and the second coupling element 140 are poured into concrete such that the nut portion 160 is accessible.
  • the first coupling element 110 is attached to the first elongate element 101 by inserting the first end portion 102 into the first receptacle 122 and driving the plurality of first load-transmission elements 125 through the first wall 121 onto the first end portion 102.
  • the screw portion 130 is screwed into the nut portion 160 to fasten the first elongate element 101 to the second elongate element 103.
  • the first elongate element 101 and the first coupling element 110 may be poured into concrete, too.
  • Fig. 2 shows the screw portion 130 in a side view.
  • the male thread 170 comprises a first individual male thread 171 and a second individual male thread 172.
  • Each of the first and second individual male threads 171, 172 have a greater thread pitch as compared to a screw having one single thread only. In this way, screwing the screw portion 130 into the nut portion 160 may be accelerated.
  • the screw portion 130 has a frustoconical shape with a flat front face 131 and a cone angle of 15°.
  • Fig. 3 shows the nut portion 160 and part of the attachment portion 150 in a cross-sectional side view.
  • the female thread 180 comprises a first individual female thread 181 and a second individual female thread 182. Each of the first and second individual female threads 181, 182 fit the first and second individual male threads 171, 172. Accordingly, the nut portion 160 has a frustoconical shape with the same cone angle a of 15°.
  • the female thread 180 has a female thread diameter d which is greater than a second receiving diameter of the second receptacle 152 and thus the second elongated element 103.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Joining Of Building Structures In Genera (AREA)
EP20215469.6A 2020-12-18 2020-12-18 Koppler Withdrawn EP4015733A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20215469.6A EP4015733A1 (de) 2020-12-18 2020-12-18 Koppler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20215469.6A EP4015733A1 (de) 2020-12-18 2020-12-18 Koppler

Publications (1)

Publication Number Publication Date
EP4015733A1 true EP4015733A1 (de) 2022-06-22

Family

ID=73855792

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20215469.6A Withdrawn EP4015733A1 (de) 2020-12-18 2020-12-18 Koppler

Country Status (1)

Country Link
EP (1) EP4015733A1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0098099A2 (de) * 1982-06-29 1984-01-11 Ccl Systems Limited Zweiteiliges Kupplungsstück für Betonarmierungsstäbe
US5305573A (en) * 1992-06-03 1994-04-26 Baumann Hanns U Energy dissipating connector
GB2327247A (en) * 1997-07-11 1999-01-20 Bico Drilling Tools Inc Threaded coupling for transferring torque
WO1999036642A1 (en) * 1998-01-15 1999-07-22 Johnson, Terence, Leslie Connecting elongate members
US7032286B2 (en) * 2000-11-21 2006-04-25 Barsplice Products, Inc. Method of making steel couplers for joining concrete reinforcing bars
US20160177992A1 (en) * 2014-12-19 2016-06-23 Lung-Chang Lin Connector for Steel Reinforcing Bars

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0098099A2 (de) * 1982-06-29 1984-01-11 Ccl Systems Limited Zweiteiliges Kupplungsstück für Betonarmierungsstäbe
US5305573A (en) * 1992-06-03 1994-04-26 Baumann Hanns U Energy dissipating connector
GB2327247A (en) * 1997-07-11 1999-01-20 Bico Drilling Tools Inc Threaded coupling for transferring torque
WO1999036642A1 (en) * 1998-01-15 1999-07-22 Johnson, Terence, Leslie Connecting elongate members
US7032286B2 (en) * 2000-11-21 2006-04-25 Barsplice Products, Inc. Method of making steel couplers for joining concrete reinforcing bars
US20160177992A1 (en) * 2014-12-19 2016-06-23 Lung-Chang Lin Connector for Steel Reinforcing Bars

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