US20090188200A1 - Clip as well as a method and a hook for use in the method for fastening reinforcement steel bars - Google Patents

Clip as well as a method and a hook for use in the method for fastening reinforcement steel bars Download PDF

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Publication number
US20090188200A1
US20090188200A1 US12/269,779 US26977908A US2009188200A1 US 20090188200 A1 US20090188200 A1 US 20090188200A1 US 26977908 A US26977908 A US 26977908A US 2009188200 A1 US2009188200 A1 US 2009188200A1
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United States
Prior art keywords
clip
hook
crossing
twisted
steel bars
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Abandoned
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US12/269,779
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Steven Edward Kelly
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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
    • E04C5/166—Connectors or means for connecting parts for reinforcements the reinforcements running in different directions
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing
    • E04G21/122—Machines for joining reinforcing bars

Definitions

  • the disclosure relates to connecting reinforcement steel bars together.
  • the Steelfixing (/Rodman) is a semi-skilled tradesman who learns the ‘tricks-of-the-trade’ based on experience.
  • the skill of Steelfixing is manual holding and wire manipulation, by being able to hold a hand tool in the preferred working hand, hold bars in other hand, wrap the wire around the reinforcement bar connection with finger manipulation on a horizontal or vertical plane and then tighten the wire with the other hand.
  • Standard binding wire bundles is 25 kg or 1.1 kg spools for side reels that fit onto the tradesman belt.
  • the experience is to choose from a variety of wire knots (see 1, 2 and 3) the most appropriate wire knot for the situation (see drawing A,B,D &E).
  • the application of fastening wire around the reinforcement steel bars is physically demanding can cause Repetitive Strain Injury on the wrist and the risk of musculoskeletal injury because of trunk posture.
  • Alternative manual wire fastening methods used on connecting reinforcement steel bars are sack (Bag) ties; straight wire lengths with two rings applied to the end and hand wire clips; shaped wire clips that can be applied around reinforcement steel bar connection. These alternatives fastening application are restrictive as fastening techniques based on single knot application.
  • Alternative manual wire fastening is a two hands application, one to hold the wire material and the other to apply.
  • Jigs Aids for Steelfixers to reduce Repetitive Strain Injury on the wrist and the risk of musculoskeletal injury by assembly of reinforcement steel shaped bars in a more ergonomic work environment are jigs combined with automated wire fasteners.
  • Jigs are shaped as a mould of the concrete element with positioning clamps to hold bars at the correct distance, such specialized jig system is WO 2005/1156820.
  • a clip for connecting steel bars having two loop shaped ends which are connected by a intermediate wire piece which is bent such that the clip can be mounted on a crossing of at least two rods and will keep its position on that rod before the clip is twisted to secure the rods together.
  • a hook for engaging a clip wherein the hook has a shaft that, on one end is provided with the hook element and that, on the other free end is insertable in a hand power tool such as a hand drill.
  • a method for connecting two steel bars crossing each other including:
  • the disclosure relates to a process and device for mutually connecting the crossing of at least two straight or bent elongated elements, such as concrete reinforcement steel bars, whereby formed ring eared clips with extending arms are placed around at the crossing of straight or shaped bars causing extending ring ears to protrude angled above the crossing to await closure caused by twisting until the clip is tightly wrapped around crossing or the ring ears are ruptured from the clip, the variable twisting speed being performed clock or anti-clock wise by a longitudinal powered conical hook which hooks in the open state the clips two ring ears, turns and twists evenly the wire ends until tighten or ruptured.
  • a longitudinal powered conical hook which hooks in the open state the clips two ring ears, turns and twists evenly the wire ends until tighten or ruptured.
  • the disclosure is to enhance the assembly on building sites and with jigs such as WO 01/46537 and includes a process and a device for mutually connecting the crossing of at least two loose straight or bent reinforcement steel bars when positioned free standing in situation or on a jig.
  • the process can be applied with a variety of shaped wire clips to meet the different assembly application requirements.
  • Extended arms are looped to make it easier to slip clip around and/or over the cross connection, loops are twisted at such an angle so the clips rests still on the connection before being closed.
  • the loops present an easy target for the powered conical hooked tool to attach to and grip before powered rotation is applied for twisting closed the open clip.
  • Shaped Loop Clips fasten reinforcement steel bars connection from diameter 6 mm to 57 mm
  • the device includes a powered conical hook that twists shaped loop clips closed through rotates in both directions; clock & anti-clock wise; able to tighten and loosen the shaped loop clip to desired tightness, by a variable degree of speeds.
  • the powered conical hook application operates in narrow and restricted areas.
  • FIGS. 1-5 show different type of wire knots and different types of clips preferred for fastening on the different reinforcement steel bar connections (A-D)
  • FIG. 6 shows a powered hand drill 1 with an embodiment of a hook 2 in it.

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

Abstract

A clip for connecting steel bars, the clip having two loop shaped ends which are connected by a intermediate wire piece which is bent such that the clip can be mounted on a crossing of at least two rods and will keep its position on that rod before the clip is twisted to secure the rods together. Also disclosed is a hook for engaging such a clip, wherein the hook has a shaft that, on one end is provided with the hook element and that, on the other free end is insertable in a hand power tool such as a hand drill. Further a method for connecting at least two steel bars crossing each other is provided, the method including the use of a jig, clips and a hook with a hand powered tool.

Description

    FIELD OF THE INVENTION
  • The disclosure relates to connecting reinforcement steel bars together.
    • BACKGROUND OF THE INVENTION
  • The Steelfixing (/Rodman) is a semi-skilled tradesman who learns the ‘tricks-of-the-trade’ based on experience. In the assembly of loose concrete reinforcement steel bars for reinforced concrete structures, a number of straight and/or shaped reinforcement steel bars must be connected to each other. The skill of Steelfixing, is manual holding and wire manipulation, by being able to hold a hand tool in the preferred working hand, hold bars in other hand, wrap the wire around the reinforcement bar connection with finger manipulation on a horizontal or vertical plane and then tighten the wire with the other hand. Standard binding wire bundles is 25 kg or 1.1 kg spools for side reels that fit onto the tradesman belt. The experience is to choose from a variety of wire knots (see 1, 2 and 3) the most appropriate wire knot for the situation (see drawing A,B,D &E). The application of fastening wire around the reinforcement steel bars is physically demanding can cause Repetitive Strain Injury on the wrist and the risk of musculoskeletal injury because of trunk posture.
  • Alternative manual wire fastening methods used on connecting reinforcement steel bars are sack (Bag) ties; straight wire lengths with two rings applied to the end and hand wire clips; shaped wire clips that can be applied around reinforcement steel bar connection. These alternatives fastening application are restrictive as fastening techniques based on single knot application. Alternative manual wire fastening is a two hands application, one to hold the wire material and the other to apply.
  • Aids for Steelfixers to reduce Repetitive Strain Injury on the wrist and the risk of musculoskeletal injury by assembly of reinforcement steel shaped bars in a more ergonomic work environment are jigs combined with automated wire fasteners. Jigs are shaped as a mould of the concrete element with positioning clamps to hold bars at the correct distance, such specialized jig system is WO 2005/1156820.
  • A variety of automated hand powered tools existing on the market prefer different mechanical fastening techniques, I.e. 1) a continuous wire spool wire is driven by motor to spin the wire a number of times around the connection, wire is served and then applied wire is twisted tight by motor: WC 03/037545 or 2) by pre shaped wire clips that are manually held around the connection and fastened by rupture U.S. Pat. No. 4,838,726, or held in a magazine and spiraled on to the connection point of the reinforcement WO 01/46537.
  • These power hand tools are not preferred on jigs to manual fastening because they are too large to fasten in restricted areas, cumbersome, only twist in one direction, single speed, two handed, require specialized power supply, do not meet new health and safety regulation or sensitive to the building site working environment.
    • SUMMARY OF THE INVENTION
  • In one aspect of the disclosure a clip for connecting steel bars is provided, the clip having two loop shaped ends which are connected by a intermediate wire piece which is bent such that the clip can be mounted on a crossing of at least two rods and will keep its position on that rod before the clip is twisted to secure the rods together.
  • In another aspect a hook for engaging a clip is provided, wherein the hook has a shaft that, on one end is provided with the hook element and that, on the other free end is insertable in a hand power tool such as a hand drill.
  • In another aspect of the disclosure a method for connecting two steel bars crossing each other is provided, the method including:
      • providing a jig in which the bars can be positioned relative to each other so that the steel bars together determine at least one crossing, for example as disclosed in WO 2005/1156820;
      • providing a clip as disclosed heroin;
      • providing a hook as disclosed herein;
      • placing the hook in a hand power tool, such as a hand power drill preferably having a clockwise and counterclockwise rotation possibility;
      • applying the at least one clip on the at least one crossing, wherein the clip maintains its position by virtue of its shape;
      • placing the hook through the loop shaped ends of the at least one clip;
      • powering the powered hand tool so that the clip is twisted and the substantially fixed is connected by the twisted clip.
  • More particular, the disclosure relates to a process and device for mutually connecting the crossing of at least two straight or bent elongated elements, such as concrete reinforcement steel bars, whereby formed ring eared clips with extending arms are placed around at the crossing of straight or shaped bars causing extending ring ears to protrude angled above the crossing to await closure caused by twisting until the clip is tightly wrapped around crossing or the ring ears are ruptured from the clip, the variable twisting speed being performed clock or anti-clock wise by a longitudinal powered conical hook which hooks in the open state the clips two ring ears, turns and twists evenly the wire ends until tighten or ruptured.
  • The disclosure is to enhance the assembly on building sites and with jigs such as WO 01/46537 and includes a process and a device for mutually connecting the crossing of at least two loose straight or bent reinforcement steel bars when positioned free standing in situation or on a jig. The process can be applied with a variety of shaped wire clips to meet the different assembly application requirements. Extended arms are looped to make it easier to slip clip around and/or over the cross connection, loops are twisted at such an angle so the clips rests still on the connection before being closed. The loops present an easy target for the powered conical hooked tool to attach to and grip before powered rotation is applied for twisting closed the open clip. Shaped Loop Clips fasten reinforcement steel bars connection from diameter 6 mm to 57 mm
  • The device includes a powered conical hook that twists shaped loop clips closed through rotates in both directions; clock & anti-clock wise; able to tighten and loosen the shaped loop clip to desired tightness, by a variable degree of speeds. The powered conical hook application operates in narrow and restricted areas.
    • ADVANTAGES
      • Loop Shape is unique for each powered conical hook closure
      • Loops on clips combined with powered conical hook rotate close the clip tight around the crossed bars
      • Loop can rupture from wire clip
      • Loop rests on connection before closing
      • Powered conical hook rotate clips both directions clock & anti-clock wise; therefore able to loosen the clip move the connecting crossed bars and then proceed tighten
      • Powered conical hook rotate at variable speeds m the clock and anti-clock wise
    SHORT DESCRIPTION OF THE DRAWINGS
  • FIGS. 1-5 show different type of wire knots and different types of clips preferred for fastening on the different reinforcement steel bar connections (A-D)
  • FIG. 6 shows a powered hand drill 1 with an embodiment of a hook 2 in it.

Claims (21)

1. A clip for connecting steel bars, the clip having two loop shaped ends which are connected by a intermediate wire piece which is bent such that the clip can be mounted on a crossing of at least two rods and will keep its position on that rod before the clip is twisted to secure the rods together.
2. The clip according to claim 1, wherein the loop shaped ends have a internal diameter such that it can be engaged by a hook.
3. The clip according to claim 1, wherein the intermediate wire piece is U-shaped, the U having two legs interconnected by a body.
4. The clip according to claim 1, wherein the intermediate wire piece is U-shaped, the U having two legs interconnected by a body, the legs containing at least one bent over a line which is substantially parallel to the body.
5. The clip according to claim 3, wherein the loops extend in a plane which includes an angle with the plane in which the legs of the U-shaped intermediate piece extend near the loops.
6. (canceled)
7. Hook for engaging a clip according to claim 1, wherein the hook has a shaft that, on one end is provided with the hook element and that, on the other free end is insertable in a hand power tool such as a hand drill.
8. Hook according to claim 7, wherein the hook tapers towards the free end thereof.
9. Method for connecting two steel bars crossing each other, the method comprising:
providing a jig in which the bars can be positioned relative to each other so that the steel bars together determine at least one crossing;
providing a clip according to claim 1;
placing the hook in a hand power tool, such as a hand power drill preferably having a clockwise and counterclockwise rotation possibility;
applying the at least one clip on the at least one crossing, wherein the clip maintains its position;
placing the hook through the loop shaped ends of the at least one clip;
powering the powered hand tool so that the clip is twisted and the substantially fixed is connected by the twisted clip.
10. Method according to claim 9, wherein multiple clips are applied to multiple crossings before and wherein, after that, the multiple clips are twisted with the hook powered by the hand powered hand tool.
11. Method according to claim 9, wherein the powered hand tool is powered until the loop shaped ends break off the twisted intermediate part of the clip.
12. The clip according to claim 2, wherein the intermediate wire piece is U-shaped, the U having two legs interconnected by a body.
13. The clip according to claim 2, wherein the intermediate wire piece is U-shaped, the U having two legs interconnected by a body, the legs containing at least one bent over a line which is substantially parallel to the body.
14. The clip according to claim 4, wherein the loops extend in a plane which includes an angle with the plane in which the legs of the U-shaped intermediate piece extend near the loops.
15. Hook for engaging a clip according to claim 2, wherein the hook has a shaft that, on one end is provided with the hook element and that, on the other free end is insertable in a hand power tool such as a hand drill.
16. Method for connecting two steel bars crossing each other, the method comprising:
providing a jig in which the bars can be positioned relative to each other so that the steel bars together determine at least one crossing;
providing a clip according to claim 2;
placing the hook in a hand power tool, such as a hand power drill preferably having a clockwise and counterclockwise rotation possibility;
applying the at least one clip on the at least one crossing, wherein the clip maintains its position;
placing the hook through the loop shaped ends of the at least one clip;
powering the powered hand tool so that the clip is twisted and the substantially fixed is connected by the twisted clip.
17. Method for connecting two steel bars crossing each other, the method comprising:
providing a jig in which the bars can be positioned relative to each other so that the steel bars together determine at least one crossing;
providing a clip according to claim 3;
placing the hook in a hand power tool, such as a hand power drill preferably having a clockwise and counterclockwise rotation possibility;
applying the at least one clip on the at least one crossing, wherein the clip maintains its position;
placing the hook through the loop shaped ends of the at least one clip;
powering the powered hand tool so that the clip is twisted and the substantially fixed is connected by the twisted clip.
18. Method for connecting two steel bars crossing each other, the method comprising:
providing a jig in which the bars can be positioned relative to each other so that the steel bars together determine at least one crossing;
providing a clip according to claim 4;
placing the hook in a hand power tool, such as a hand power drill preferably having a clockwise and counterclockwise rotation possibility;
applying the at least one clip on the at least one crossing, wherein the clip maintains its position;
placing the hook through the loop shaped ends of the at least one clip;
powering the powered hand tool so that the clip is twisted and the substantially fixed is connected by the twisted clip.
19. Method for connecting two steel bars crossing each other, the method comprising:
providing a jig in which the bars can be positioned relative to each other so that the steel bars together determine at least one crossing;
providing a clip according to claim 5;
placing the hook in a hand power tool, such as a hand power drill preferably having a clockwise and counterclockwise rotation possibility;
applying the at least one clip on the at least one crossing, wherein the clip maintains its position;
placing the hook through the loop shaped ends of the at least one clip;
powering the powered hand tool so that the clip is twisted and the substantially fixed is connected by the twisted clip.
20. Method for connecting two steel bars crossing each other, the method comprising:
providing a jig in which the bars can be positioned relative to each other so that the steel bars together determine at least one crossing;
providing a clip according to claim 6;
placing the hook in a hand power tool, such as a hand power drill preferably having a clockwise and counterclockwise rotation possibility;
applying the at least one clip on the at least one crossing, wherein the clip maintains its position;
placing the hook through the loop shaped ends of the at least one clip;
powering the powered hand tool so that the clip is twisted and the substantially fixed is connected by the twisted clip.
21. Method according to claim 10, wherein the powered hand tool is powered until the loop shaped ends break off the twisted intermediate part of the clip.
US12/269,779 2007-11-12 2008-11-12 Clip as well as a method and a hook for use in the method for fastening reinforcement steel bars Abandoned US20090188200A1 (en)

Applications Claiming Priority (2)

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EP07120512.4 2007-11-12
EP07120512A EP2058452B1 (en) 2007-11-12 2007-11-12 Method for fastening reinforcement steel bars

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US20110162317A1 (en) * 2007-12-31 2011-07-07 Baruh Bradford G Clip for joining reinforced members for use in reinforced concrete slabs and/or columns
JP2014167246A (en) * 2013-02-01 2014-09-11 Zen Giken Kk Reinforcement binding tool
CN107630561A (en) * 2017-10-18 2018-01-26 中建科技（北京）有限公司 A kind of multi-functional bar tied hook and method for binding reinforcing steel bars
CN107882274A (en) * 2017-11-16 2018-04-06 山东万世机械科技有限公司 A kind of metal screw thread
US10106984B2 (en) * 2015-04-08 2018-10-23 A New Twist Llc Tool free rebar tie
US10280621B2 (en) 2015-04-08 2019-05-07 A New Twist Llc Method of tying a rebar tie
TWI681101B (en) * 2017-08-28 2020-01-01 金京淑 V-shaped rib with integrated quick fix

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CN102134892B (en) * 2011-02-23 2012-06-20 邱爽 Cushion block for steel wire mesh or steel wire mesh frame
JP4988950B1 (en) * 2011-08-25 2012-08-01 株式会社杢目金屋 Ring manufacturing method, apparatus and ring

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US20110162317A1 (en) * 2007-12-31 2011-07-07 Baruh Bradford G Clip for joining reinforced members for use in reinforced concrete slabs and/or columns
US8112964B2 (en) * 2007-12-31 2012-02-14 Baruh Bradford G Clip for joining reinforced members for use in reinforced concrete slabs and/or columns
JP2014167246A (en) * 2013-02-01 2014-09-11 Zen Giken Kk Reinforcement binding tool
US10106984B2 (en) * 2015-04-08 2018-10-23 A New Twist Llc Tool free rebar tie
US10280621B2 (en) 2015-04-08 2019-05-07 A New Twist Llc Method of tying a rebar tie
TWI681101B (en) * 2017-08-28 2020-01-01 金京淑 V-shaped rib with integrated quick fix
CN107630561A (en) * 2017-10-18 2018-01-26 中建科技（北京）有限公司 A kind of multi-functional bar tied hook and method for binding reinforcing steel bars
CN107882274A (en) * 2017-11-16 2018-04-06 山东万世机械科技有限公司 A kind of metal screw thread

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