WO2008024049A1 - System and method for tying together reinforcing bars - Google Patents

System and method for tying together reinforcing bars Download PDF

Info

Publication number
WO2008024049A1
WO2008024049A1 PCT/SE2007/000742 SE2007000742W WO2008024049A1 WO 2008024049 A1 WO2008024049 A1 WO 2008024049A1 SE 2007000742 W SE2007000742 W SE 2007000742W WO 2008024049 A1 WO2008024049 A1 WO 2008024049A1
Authority
WO
WIPO (PCT)
Prior art keywords
grid
slide rod
fastening means
reinforcing bars
tying
Prior art date
Application number
PCT/SE2007/000742
Other languages
French (fr)
Inventor
Peter Hoyaukin
Original Assignee
LAGERSTEDT, Lars, Christer
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 LAGERSTEDT, Lars, Christer filed Critical LAGERSTEDT, Lars, Christer
Publication of WO2008024049A1 publication Critical patent/WO2008024049A1/en

Links

Classifications

    • 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 present invention generally relates to tying together reinforcing bars. More specifically the invention relates to a system and a method to be used when tying together such reinforcing bars using a wire twisting machine.
  • reinforcing bars which provide reinforcement to concrete structures
  • thread wires which are twisted by hand.
  • a variety of battery operated machines have become available on the market, which are positioned over the reinforcing bars to be tied together to do the twisting work automatically at the push of a button.
  • a common problem in these machines is that they become cumbersome to operate after a while due to their weight.
  • the purpose of alleviating the worker from doing the work of manually twisting the wires is thus thwarted by a weight problem, which still puts the worker at risk for acquiring repetitive strain injuries.
  • the present invention is primarily intended to be used while tying together the reinforcing bars of vertically positioned grids of reinforcing bars.
  • One object of the invention is to facilitate such tying together of vertically arranged reinforcing bars. This and other objects are achieved by the system as set out in claim 1 and also by the method as set out in claim 5.
  • the invention thus presents a way to avoid repetitive strain and other injuries by the use of a sliding support in order to counter balance the weight of the twisting machine. In addition to that repetitive stress injuries may be avoided using the method presented; the invention also presents a way to speed up the work at hand by decreasing the workload and improving the ergonomics of the work.
  • the system according to the invention comprises a horizontal slide rod which is supported by fastening means arranged to engage a horizontal bar of the reinforcing grid.
  • a weight and counter balance mechanism for the reinforcing bar twisting machine is slidably attached to the horizontal slide rod in such a way that it will relieve the worker of almost the complete weight of the machine.
  • At least one of the fastening means is preferably arranged to engage also a vertical bar of the reinforcing grid.
  • the slide rod is preferably fastened horizontally to the grid of reinforcing bars being worked on in such a way that sufficient space is created for the sliding counter balancing and supporting mechanism to pass freely along the slide rod.
  • the slide rod may be supported at each end by a hook and lock means which fastens the rod at each end to reinforcing bars in the grid being worked on.
  • Each fastening means may be self-locking in such a way that when it is manually lifted upwards, it is unlocked and free to be moved to and fastened at a new position.
  • the slide rod can be easily mounted in any position on the grid of reinforcing bars.
  • the fastening means When the sliding bar is supported by the fastening means it can be locked to these in order to prevent movement of the slide rod in a horizontal direction.
  • Each fastening means may for example comprise two legs which are arranged to be hooked over a respective horizontal bar and which each comprises a slot, which is arranged to engage or receive a vertical bar of the grid.
  • the slide rod in itself may consist of a bar or even better a tube. It may or may not be constructed in one piece or in sections, which are joined or telescoped together.
  • the slide rod may have any suitable length.
  • the slide rod may be around two meters long. Such a length has proven to be easy to use and still provide a sufficiently long active reach.
  • a sliding shoe may be positioned on or around the slide rod.
  • the sliding shoe may be constructed in such a way using already known techniques that it easily slides along the length of the slide rod.
  • the sliding shoe may contain or support a counter balancing mechanism which, for example through the use of strings or wires spring loaded around a spool, counter balances the weight of a machine hooked up to the slide rod.
  • the twisting machine may be easily moved both in a horizontal and a vertical direction while requiring very little effort for such movements.
  • the work operation using the invention is thus carried out using an almost weightless machine to tie together the reinforcing bars at an intersection of a grid.
  • the machine may be disposed horizontally, without effort, to the next intersection in order to carry out subsequent tying operations of the reinforcing bars.
  • the machine may easily be moved upwards or downwards to the next horizontal row of intersections.
  • the worker positions and locks the slide rod in the position desired next by means of the fastening means, in order to continue his work.
  • Fig. 1 shows a diagrammatical front view of an exemplifying arrangement according to the invention.
  • Fig. 2 is a side view of the arrangement of Fig. 1.
  • Fig. 3 is a perspective view of a fastening means of the arrangement.
  • Fig. 1 and 2 shows an arrangement for tying together the horizontal and the vertical reinforcing bars 1 and 2, respectively, at each intersection of a reinforcing grid 3 formed by said bars.
  • the tying together is to be carried out by means of a hand operated twisting machine 4 of any prior art or newly developed kind.
  • the twisting machine is only shown diagrammatically as the machine in itself does not form part of the present invention.
  • the machine comprises two jaws 5 by means of which a twisting wire can be passed around the reinforcing bars at an intersection between a horizontal and a vertical bar 1 , 2, and the ends of the wire twisted together at the front surface of the grid.
  • a twisting machine suitable for such working operation is disclosed in my International Patent Application published under No. WO 2004/083559.
  • the arrangement comprises at least two fastening means 20 as shown in Fig. 3.
  • the fastening means 20 comprises two legs 6 and 7 intended to be hooked over two horizontal reinforcing bars 1 of the grid as shown in Fig. 2.
  • the hook shaped ends of the legs 6 and 7 each is provided with a slot 8 and 9, respectively, intended to accommodate a vertical reinforcing bar 2, when mounted to the grid 3.
  • a slide rod 10 can be positioned as shown in Fig. 1 and 2.
  • the slide rod 10 is supported by a supporting arm 11 forming part of or being attached to the inner surface of the lower leg 7 of each fastening means 20.
  • the slide rod and fastening means can be easily removed and moved to a new position on the grid 3 in order to permit the slide rod 10 to be mounted in any desired position on the grid.
  • the leg 7 and arm 11 of said means are provided each with a hole 12 and 13, respectively, see Fig. 3.
  • the slide rod 10 is provided with a number of similar holes 14, see Fig. 1. Through these holes a pin provided with a grip 15 can be inserted to prevent the slide rod 10 from moving in the horizontal direction relatively to the fastening means 20.
  • At least one sliding shoe 16 is mounted on the slide rod 10 such that it can be moved side ways along the rod.
  • the twisting machine 4 is hooked to the sliding shoe in order to relieve the operator from carrying the weight of the machine.
  • the machine 4 can be moved sideways in order to be used for tying together the vertical reinforcing bars 2 with a horizontal bar 1 without the need for the operator to carry the weight of the machine.
  • the machine 4 is hooked to the sliding shoe 16 by means of a counter balancing mechanism 17 comprising a string or wire 18 spring loaded around a spool (not visible).
  • This mechanism 17 can be set so that the complete weight of the twisting machine 4 is counter balanced while the machine is lowered and raised for tying together the horizontal reinforcing bars 1 with a vertical reinforcing bar 2.
  • Counter balancing mechanisms suitable to be used according to the present invention are known in the prior art and used in connection with assembling works in the industry. Any kind of such counter balancing mechanism which can be hooked to the slide rod can be used in the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Basic Packing Technique (AREA)
  • Wire Processing (AREA)

Abstract

A system for tying together the reinforcing bars of a substantially vertical reinforcing grid (3), comprising a twisting machine (4) for tying the bars together at intersections of the grid by means of a wire. The system comprises a slide rod (10), a weight counter balancing means (17) and at least two fastening means (20), which fastening means are arranged to engage a horizontal bar (1) of the grid and to support the slide rod, which slide rod is arranged to slidably support the balancing means which is arranged to support the twisting machine. The invention also concerns a method for tying together such reinforcing bars.

Description

System and Method for Tying Together Reinforcing Bars
Background of the invention
The present invention generally relates to tying together reinforcing bars. More specifically the invention relates to a system and a method to be used when tying together such reinforcing bars using a wire twisting machine.
In the construction industry traditionally reinforcing bars, which provide reinforcement to concrete structures, are tied together using thread wires, which are twisted by hand. In recent years a variety of battery operated machines have become available on the market, which are positioned over the reinforcing bars to be tied together to do the twisting work automatically at the push of a button. A common problem in these machines is that they become cumbersome to operate after a while due to their weight. The purpose of alleviating the worker from doing the work of manually twisting the wires is thus thwarted by a weight problem, which still puts the worker at risk for acquiring repetitive strain injuries.
Summary of the invention
The present invention is primarily intended to be used while tying together the reinforcing bars of vertically positioned grids of reinforcing bars. One object of the invention is to facilitate such tying together of vertically arranged reinforcing bars. This and other objects are achieved by the system as set out in claim 1 and also by the method as set out in claim 5.
The invention thus presents a way to avoid repetitive strain and other injuries by the use of a sliding support in order to counter balance the weight of the twisting machine. In addition to that repetitive stress injuries may be avoided using the method presented; the invention also presents a way to speed up the work at hand by decreasing the workload and improving the ergonomics of the work.
In one embodiment the system according to the invention comprises a horizontal slide rod which is supported by fastening means arranged to engage a horizontal bar of the reinforcing grid. A weight and counter balance mechanism for the reinforcing bar twisting machine is slidably attached to the horizontal slide rod in such a way that it will relieve the worker of almost the complete weight of the machine.
At least one of the fastening means is preferably arranged to engage also a vertical bar of the reinforcing grid. By this means the risk of unintentional horizontal displacement of the slide rod is reduced.
The slide rod is preferably fastened horizontally to the grid of reinforcing bars being worked on in such a way that sufficient space is created for the sliding counter balancing and supporting mechanism to pass freely along the slide rod. The slide rod may be supported at each end by a hook and lock means which fastens the rod at each end to reinforcing bars in the grid being worked on. Each fastening means may be self-locking in such a way that when it is manually lifted upwards, it is unlocked and free to be moved to and fastened at a new position. Thus, by means of such fastening means the slide rod can be easily mounted in any position on the grid of reinforcing bars. When the sliding bar is supported by the fastening means it can be locked to these in order to prevent movement of the slide rod in a horizontal direction.
Each fastening means may for example comprise two legs which are arranged to be hooked over a respective horizontal bar and which each comprises a slot, which is arranged to engage or receive a vertical bar of the grid. By this means a simple, reliable and cost efficient fastening means is accomplished.
The slide rod in itself may consist of a bar or even better a tube. It may or may not be constructed in one piece or in sections, which are joined or telescoped together. The slide rod may have any suitable length. For example the slide rod may be around two meters long. Such a length has proven to be easy to use and still provide a sufficiently long active reach. A sliding shoe may be positioned on or around the slide rod. The sliding shoe may be constructed in such a way using already known techniques that it easily slides along the length of the slide rod. The sliding shoe may contain or support a counter balancing mechanism which, for example through the use of strings or wires spring loaded around a spool, counter balances the weight of a machine hooked up to the slide rod.
By means of the slide rod and the weight counter balancing means the twisting machine may be easily moved both in a horizontal and a vertical direction while requiring very little effort for such movements. The work operation using the invention is thus carried out using an almost weightless machine to tie together the reinforcing bars at an intersection of a grid. As soon as this is done, the machine may be disposed horizontally, without effort, to the next intersection in order to carry out subsequent tying operations of the reinforcing bars. When a complete horizontal row of intersections have been tied together, the machine may easily be moved upwards or downwards to the next horizontal row of intersections. When the tying at the intersections along and beneath the slide rod have been completed, the worker positions and locks the slide rod in the position desired next by means of the fastening means, in order to continue his work.
Brief description of the drawings
Fig. 1 shows a diagrammatical front view of an exemplifying arrangement according to the invention.
Fig. 2 is a side view of the arrangement of Fig. 1.
Fig. 3 is a perspective view of a fastening means of the arrangement.
Detailed description of an embodiment of the invention
Fig. 1 and 2 shows an arrangement for tying together the horizontal and the vertical reinforcing bars 1 and 2, respectively, at each intersection of a reinforcing grid 3 formed by said bars. The tying together is to be carried out by means of a hand operated twisting machine 4 of any prior art or newly developed kind. The twisting machine is only shown diagrammatically as the machine in itself does not form part of the present invention. The machine comprises two jaws 5 by means of which a twisting wire can be passed around the reinforcing bars at an intersection between a horizontal and a vertical bar 1 , 2, and the ends of the wire twisted together at the front surface of the grid. One example of a twisting machine suitable for such working operation is disclosed in my International Patent Application published under No. WO 2004/083559.
The arrangement comprises at least two fastening means 20 as shown in Fig. 3. The fastening means 20 comprises two legs 6 and 7 intended to be hooked over two horizontal reinforcing bars 1 of the grid as shown in Fig. 2. The hook shaped ends of the legs 6 and 7 each is provided with a slot 8 and 9, respectively, intended to accommodate a vertical reinforcing bar 2, when mounted to the grid 3.
After two such fastening means 20 have been hooked to the grid 3 of reinforcing bars 1 , 2 as shown in Fig. 1 a slide rod 10 can be positioned as shown in Fig. 1 and 2. The slide rod 10 is supported by a supporting arm 11 forming part of or being attached to the inner surface of the lower leg 7 of each fastening means 20. The slide rod and fastening means can be easily removed and moved to a new position on the grid 3 in order to permit the slide rod 10 to be mounted in any desired position on the grid.
In order to prevent the slide rod 10 from sliding in the horizontal direction relatively to the fastening means 20 the leg 7 and arm 11 of said means are provided each with a hole 12 and 13, respectively, see Fig. 3. Also the slide rod 10 is provided with a number of similar holes 14, see Fig. 1. Through these holes a pin provided with a grip 15 can be inserted to prevent the slide rod 10 from moving in the horizontal direction relatively to the fastening means 20.
At least one sliding shoe 16 is mounted on the slide rod 10 such that it can be moved side ways along the rod. The twisting machine 4 is hooked to the sliding shoe in order to relieve the operator from carrying the weight of the machine. Thus, the machine 4 can be moved sideways in order to be used for tying together the vertical reinforcing bars 2 with a horizontal bar 1 without the need for the operator to carry the weight of the machine.
In an preferred embodiment shown in Fig. 1 the machine 4 is hooked to the sliding shoe 16 by means of a counter balancing mechanism 17 comprising a string or wire 18 spring loaded around a spool (not visible). This mechanism 17 can be set so that the complete weight of the twisting machine 4 is counter balanced while the machine is lowered and raised for tying together the horizontal reinforcing bars 1 with a vertical reinforcing bar 2. Counter balancing mechanisms suitable to be used according to the present invention are known in the prior art and used in connection with assembling works in the industry. Any kind of such counter balancing mechanism which can be hooked to the slide rod can be used in the present invention.
The use of a sliding shoe in combination with a counter balancing mechanism of the kind described makes it possible for a worker to tie together the reinforcing bars of a grid at each intersection of the grid without having to carry the weight of the machine.
Above an exemplifying description of the invention has been given. It is to be understood that the invention is not limited to this description and that the invention may be freely varied within the scope of the appending claims.

Claims

Claims
1. A system for tying together the reinforcing bars of a substantially vertical reinforcing grid (3), comprising a twisting machine (4) for tying the bars together at intersections of the grid by means of a wire, characterized by a slide rod (10), a weight counter balancing means (17) and at least two fastening means (20), which fastening means are arranged to engage a horizontal bar (1 ) of the grid and to support the slide rod, which slide rod is arranged to slidably support the balancing means which is arranged to support the twisting machine.
2. A system according to claim 1 , wherein at least one fastening means (20) is arranged to engage a vertical bar (2) of the grid.
3. A system according to claim 1 or 2, wherein the fastening means (20) are arranged to support the sliding rod (10) at a horizontal distance from the grid (3).
4. A system according any of claims 1-3, wherein each fastening means
(20) comprises two legs (6, 7) arranged to be hooked over a respective horizontal reinforcing bar (1 ), each leg comprising a slot (8, 9) arranged engage a vertical bar.
5. A method for tying together the reinforcing bars (1 , 2) of a substantially vertical reinforcing grid (3) by means of a twisting machine (4) using wire to tie the bars together at intersections of the grid, characterized by using a machine suspended from a slide rod (10) by means of weight counter balancing means.
6. A method according to claim 5, wherein the slide rod (10) is supported by at least two fastening means (20) which engage a horizontal bar (1 ) of the grid.
PCT/SE2007/000742 2006-08-23 2007-08-22 System and method for tying together reinforcing bars WO2008024049A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0601723A SE529633C2 (en) 2006-08-23 2006-08-23 Vertical reinforcing grid `s reinforcing bars tying system for construction industry, has two fastening units engaging horizontal bar of grid, and slide rod supporting balancing unit that supports twisting machine
SE0601723-0 2006-08-23

Publications (1)

Publication Number Publication Date
WO2008024049A1 true WO2008024049A1 (en) 2008-02-28

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Application Number Title Priority Date Filing Date
PCT/SE2007/000742 WO2008024049A1 (en) 2006-08-23 2007-08-22 System and method for tying together reinforcing bars

Country Status (2)

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SE (1) SE529633C2 (en)
WO (1) WO2008024049A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10061323B2 (en) 2016-12-22 2018-08-28 Advanced Construction Robotics, Inc. Autonomous apparatus and system for repetitive tasks in construction project
CN110441067A (en) * 2019-07-23 2019-11-12 北京现代汽车有限公司 Hand is stretched and the design method of the evaluating apparatus of property and human-computer interaction component
US10597264B1 (en) 2018-12-20 2020-03-24 Advanced Construction Robotics, Inc. Semi-autonomous system for carrying and placing elongate objects
CN111958567A (en) * 2020-06-24 2020-11-20 张世祥 A reinforcing bar rack that is arranged in building work process to make things convenient for reinforcing bar to take
CN112814393A (en) * 2021-01-19 2021-05-18 徐雨锋 Auxiliary fixing device used in concrete pouring process for manufacturing reinforcing steel bar grids
EP4148204A1 (en) * 2021-09-13 2023-03-15 Max Co., Ltd. Tool and binding machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109488027B (en) * 2018-11-23 2023-10-13 中国五冶集团有限公司 Accurate positioning structure of pipeline

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2025906A1 (en) * 1970-05-27 1971-12-09 Fa. Anton Heggenstaller, 8891 Unterbernbach Device for tensioning tires on containers
US5938099A (en) * 1997-05-01 1999-08-17 Ciccarelli; Mark A. Rebar clip gun
US6231024B1 (en) * 1998-10-19 2001-05-15 Kabushikikaisha Kugin Formwork forming unit
WO2004083559A1 (en) * 2003-03-18 2004-09-30 Peter Hoyaukin Method and machine for binding elongate objects together

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2025906A1 (en) * 1970-05-27 1971-12-09 Fa. Anton Heggenstaller, 8891 Unterbernbach Device for tensioning tires on containers
US5938099A (en) * 1997-05-01 1999-08-17 Ciccarelli; Mark A. Rebar clip gun
US6231024B1 (en) * 1998-10-19 2001-05-15 Kabushikikaisha Kugin Formwork forming unit
WO2004083559A1 (en) * 2003-03-18 2004-09-30 Peter Hoyaukin Method and machine for binding elongate objects together

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10061323B2 (en) 2016-12-22 2018-08-28 Advanced Construction Robotics, Inc. Autonomous apparatus and system for repetitive tasks in construction project
US10597264B1 (en) 2018-12-20 2020-03-24 Advanced Construction Robotics, Inc. Semi-autonomous system for carrying and placing elongate objects
CN110441067A (en) * 2019-07-23 2019-11-12 北京现代汽车有限公司 Hand is stretched and the design method of the evaluating apparatus of property and human-computer interaction component
CN111958567A (en) * 2020-06-24 2020-11-20 张世祥 A reinforcing bar rack that is arranged in building work process to make things convenient for reinforcing bar to take
CN112814393A (en) * 2021-01-19 2021-05-18 徐雨锋 Auxiliary fixing device used in concrete pouring process for manufacturing reinforcing steel bar grids
EP4148204A1 (en) * 2021-09-13 2023-03-15 Max Co., Ltd. Tool and binding machine

Also Published As

Publication number Publication date
SE0601723L (en) 2007-10-09
SE529633C2 (en) 2007-10-09

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