EP2095891A1 - Element de soutien de barres ayant une extrémité recourbée dans un dispositif d'amenée vers une machine de soudage - Google Patents

Element de soutien de barres ayant une extrémité recourbée dans un dispositif d'amenée vers une machine de soudage Download PDF

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Publication number
EP2095891A1
EP2095891A1 EP09380034A EP09380034A EP2095891A1 EP 2095891 A1 EP2095891 A1 EP 2095891A1 EP 09380034 A EP09380034 A EP 09380034A EP 09380034 A EP09380034 A EP 09380034A EP 2095891 A1 EP2095891 A1 EP 2095891A1
Authority
EP
European Patent Office
Prior art keywords
feeder
rods
supporting
bent end
rod
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Withdrawn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
EP09380034A
Other languages
German (de)
English (en)
Inventor
Josep Salichs Puig
Juan Antonio FrÍas Redondo
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.)
Mecanica Riells Sl
Original Assignee
Mecanica Riells Sl
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 Mecanica Riells Sl filed Critical Mecanica Riells Sl
Publication of EP2095891A1 publication Critical patent/EP2095891A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F27/00—Making wire network, i.e. wire nets
    • B21F27/12—Making special types or portions of network by methods or means specially adapted therefor
    • B21F27/121—Making special types or portions of network by methods or means specially adapted therefor of tubular form, e.g. as reinforcements for pipes or pillars
    • B21F27/125—Making special types or portions of network by methods or means specially adapted therefor of tubular form, e.g. as reinforcements for pipes or pillars by attaching individual stirrups to longitudinal wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F23/00—Feeding wire in wire-working machines or apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F27/00—Making wire network, i.e. wire nets
    • B21F27/12—Making special types or portions of network by methods or means specially adapted therefor
    • B21F27/14—Specially bending or deforming free wire ends

Definitions

  • the invention relates to a support device for a feeder of rods with a bent end for feeding a welding station comprising rod supporting means capable of movably supporting said rod with respect to said support device.
  • the invention relates to a feeder of rods with a bent end for feeding a welding station of a framework of a reinforced concrete structural element.
  • welding machines are known for welding rods together.
  • machines are known for welding reticular, flat, grill structures, known in the field as an electro-welded mesh.
  • the electro-welded mesh consists of a grid of longitudinal and transverse rods welded together.
  • the longitudinal rods are supplied to a welding station continually from reels, while the transverse rods, at the time of welding, are fed to the welding station in their definitive position within the welded wire mesh. In other words, transverse to the longitudinal rods, cut at a predetermined length.
  • these machines are not suitable for welding frameworks intended for producing reinforced conctrete structural elements such as beams, joists or pillars that also have embedding ends.
  • these frameworks are made up of a plurality of longitudinal rods that are joined to a plurality of transverse rods that define the cross section of the framework, forming a three-dimensional structure, for example, like a parallelepiped.
  • the longitudinal rods are bent at the tip thereof forming a bent end to improve the embedding of the framework in the concrete structure. These bent ends hinder the feeding of said longitudinal rods to the welding station, whereby it is very complicated to continually produce frameworks of this type in an industrial machine.
  • the aim of the invention is to overcome this drawback.
  • This purpose is achieved by means of a support device for a feeder of rods with a bent end, characterized in that said supporting means are pivotally mounted between a supporting position of said rod and a withdrawn position, such that when said bent end passes by said device, said supporting means move from said supporting position towards said withdrawn position enabling the passing of said bent end.
  • the device during the feeding of the longitudinal rods to a welding station, the device is at rest, whereas the longitudinal rods advance towards the welding station in the feeding direction in order the respective welding to be performed. Thanks to this arrangement, the masses to be moved in the welding station are reduced.
  • the pivoting action of the supporting means of the device can be produced in very different ways, it is particularly convenient that the pivoting be produced in as simple and energy-efficient way as possible. So, preferably said bent end moves said supporting means from said supporting position to said withdrawn position. This avoids having to use any means for detecting the passage of the bent end and additional control and driving means for withdrawing the supporting means when the rod end passes.
  • the support device further comprises return means to said supporting position after the passing of said bent end, and particularly preferably these return means are elastic means.
  • said supporting means comprise a roller rotatably mounted on its own axis, such that said rod moves with respect to said device by means of a rolling movement. Thanks to this arrangement, frictional losses are reduced during the movement of the rod with respect to the support device.
  • the invention also raises the problem of how to feed a welding bridge for welding frameworks, avoiding unnecessary process interruptions, so that framework production can be industrialised.
  • the invention also proposes a feeder of rods with a bent end for feeding a welding station of a framework of a reinforced concrete structural element.
  • the framework comprises at least one transverse container rod that defines the limits of the cross section of said framework and a plurality of longitudinal rods, arranged inside said cross section, the feeder comprising a plurality of support devices according to the invention for supporting said longitudinal rods that can move with respect to said support devices. Thanks to the plurality of support devices, several of said longitudinal rods can be supported in a pre-welding position, so that they are introduced into the welding bridge, ready for welding.
  • the feeder comprises a frame and driving means and said support devices are movably mounted with respect to said frame by means of said driving means.
  • the feeder preferably comprises guiding means to guide said support devices. So, the machine is particularly efficient from the point of view of electricity consumption, because the only element that moves during the feeding is the actual framework, whereas, during the framework welding process, the feeder is stationery with respect to the welding station.
  • the driving means have associated control means that act upon said driving means and make it possible to regulate the final position of the support devices with respect to the framework. So, if it is necessary to modify the type of framework to be produced, the support devices only need to be moved to their new position, without having to change any tools.
  • the feeder according to the invention makes it possible to feed both the longitudinal rods of the framework, and the transverse rods or stirrups.
  • an operator loads the feeder with all the transverse rods needed to complete the framework, as will be appreciated later.
  • the feeder individually supplies the transverse rod that has to be welded.
  • the feeder comprises spacers to maintain the separation between said longitudinal rods and said transverse rods during the feeding operation.
  • the feeder comprises positioning means for said transverse rods into a stand-by position and said positioning means comprises sensors for locating the position of said transverse rods.
  • FIGS 1 to 4 show a general view of a feeder 13 of rods 4, 6 to a welding station 15 for producing the framework of a reinforced concrete structural element.
  • welding station 15 is indicated in Figures 1 and 2 by a square illustrated with dotted lines.
  • the term "reinforced concrete structural element” is understood to be any reinforced concrete element that does not have exclusively a flat grid frame. Examples of these structural elements are pillars, beams, joists or others.
  • the general term of rod 4, 6 relates both to the bars and the wires that may make up the framework of the structural element. These bars or wires are drawn or corrugated. Also, it is worth mentioning that in the art, the transverse rods 6 are also known as stirrups.
  • the framework is made up of a plurality of transverse rods 6 that define the limits of the cross section of the framework.
  • longitudinal rods 4 are arranged inside these transverse rods 6.
  • the top longitudinal rods 4 in the framework are movably supported in the direction of arrow A in Figure 1 over a plurality of support devices 1 integrated in strips 3a of feeder 13.
  • Feeder 13 shown in the figures enables the feeding of eight longitudinal rods 4, using four strips 3a at the top with devices 1 and four strips 3b at the bottom of the framework which, in this case, do not comprise devices 1.
  • the figures show the case of feeding rods 4, 6 for a rectangular section framework with just four longitudinal rods 4.
  • top strips 3a with the support devices 1 are joined by tubes 28 to a frame made up of two first cross beams 16 and two transoms 26.
  • the frame can be moved vertically in the direction of the double arrow B in Figures 3 and 4 , guided by the first guiding means 18 and driven by first driving means 17, consisting of a motor and chain drive. This way, the height of strips 3a can be positioned correctly and consequently support devices 1 on which longitudinal rods 4 rest.
  • bottom strips 3b are also joined to frame 14 via tubes 28.
  • strips 3a, 3b are horizontally movable with respect to frame 14 in the direction of the double arrow C in Figures 3 and 4 , via tubes 28.
  • feeder 13 comprises second guiding means 20, so that tubes 28 are horizontally movable with respect to frame 14.
  • Bottom strips 3b also comprise second guiding means 20 for the horizontal movement thereof.
  • Tubes 28 and strips 3a, 3b are driven by second driving means 19 made up of motors and spindles.
  • Outermost top strips 3a, as well as outermost bottom strips 3b, are joined by threaded bushings 30 to the spindle consisting of two threaded sections 27a, 27b in opposite directions.
  • top and bottom central strips 3a, 3b are assigned their respective second driving means 19 and guiding means 20 like the ones already described in the preceding paragraph, so they can be activated independently.
  • the link between tubes 28 of said central strips 3a, 3b and their respective spindles is already produced as already explained above. Thanks to the fact that the movement of central strips 3a, 3b is independent, it is possible to create rectangular section frames with one single intermediary longitudinal rod 4 in the centre of the framework.
  • strips 3a, 3b can also move together in the feeding direction of welding station 15, indicated by double arrow D in Figure 2 .
  • third driving means 21 are provided enabling to move all strips 3a, 3b on third guiding means 22. This means that the distance from feeder 13 to welding station 15 can be reduced or increased conveniently during the loading and unloading tasks.
  • two feeders 13 would be provided that could be moved sideways to the welding machine 15. This way, while one feeder 13 was busy with the welding process for the framework, the other one, that would be moved sideways, could be loaded by an operator with the necessary rods 4, 6.
  • strips 3a, 3b, and therefore support devices 1 are positioned automatically.
  • preprogrammed control means activate driving means 17, 19, 21 to move strips 3a, 3b, to the position of longitudinal rods 4 corresponding to their definitive position in the framework.
  • top strips 3a a plurality of devices 1 according to the invention are mounted to support longitudinal rods 4.
  • devices 1 are integrated in the body of strips 3a. Nevertheless, these devices 1 could also be independent integral units threaded with strips 3a.
  • these support devices 1 are preferably mounted in top strips 3a, because they have to support rods 4 with the bent ends 5 facing downwards. On the contrary, when rods 4 have their bent ends 5 pointing upward, bent end 5 does not normally interfere with the point of support of rod 4.
  • Support devices 1 comprise supporting means 2 in the form of rollers 7 that pivot around axis 8 between a supporting position and a withdrawn position.
  • rollers 7 that are rotatable on their own axis, the force needed to move longitudinal rods 4 in the direction of the welding bridge is reduced.
  • Figures 5 and 6 from right to left can be appreciated, a first support device 1 in supporting position of rod 4, a central device 1 when it is removed by bent end 5 of rod 4 to its withdrawn position and finally, a device 1 on the left having returned to its supporting position after bent end 5 of rod 4 has passed by.
  • supporting means 2 of device 1 move from the supporting position, to the withdrawn position by pivoting around axis 8 when they are moved away by bent end 5, as can be seen to the right of Figures 5 and 6 .
  • return means 9 return supporting means 2 to their rest position, in other words, the supporting position.
  • these return means 9 are elastic means, which in this embodiment consist of a torsion spring.
  • Figures 8 and 9 illustrate a second embodiment of support device 1.
  • supporting means 2 also pivot arround an axis 8 between the supporting position of longitudinal rod 4 and the withdrawn position. Also these means 2 have an arm 11 that rotates integrally with supporting means 2 during the pivoting action.
  • elastic return means 9 are provided which, in this case, consist of a extension spring that extends between end 12 of arm 11 away from axis 8, and a fixed point 10 on strip 3a.
  • feeder 13 With all the rods 4 and 6 necessary for producing the structure.
  • the operator has arranged four longitudinal rods 4 in strips 3a and 3b and, furthermore, all the transverse rods 6 that are needed to be able to produce the framework.
  • feeder 13 in front of welding station 15.
  • longitudinal rods 4 gradually advance towards welding station 15 by means of a dragging mechanism, not shown, that pulls the framework in feeding direction A.
  • the advance of the framework corresponds to its pitch, the pitch being defined as the distance between consecutive transverse rods.
  • transverse rods 6 In order to prevent all the waiting transverse rods 6 from being welded, they advance together with longitudinal rods 4 of the framework, and the invention provides spacers 25 that can be seen in detail in Figure 11 on which the transverse rods needed for the whole framework are arranged. In other words, in this area of feeder 13 a reservoir of transverse rods is formed 6. Each time that the framework advances, transverse rods 6 to be welded are kept stationery with respect to feeder 13.
  • feeder 13 provides positioning means 23 that are responsible for separating the transverse rod 6 that must be welded in each pitch of the framework and position it so that welding station 15 can proceed to position it definitively and then weld it.
  • These positioning means 23 consist of a pneumatic cylinder which, by means of sensors 24, locates in the reservoir of rods 6, the position of the following transverse rods 6 that must be welded in the next step.
  • These sensors 24 can be, for example, an inductive sensor.
  • any detection technique can be applied to detect which is the following transverse rod 6 that has to be moved towards welding station 15.
  • Figure 2 shows the stroke of positioning means 23. Dotted lines illustrate these means 23 to the left at the front of frame 14. The right-hand side of this figure show the maximum stroke that they perform to position the corresponding transverse rod 6.
  • the height and width of positioning means 23 can also be regulated by means of corresponding guides and driving means to adapt to the sizes of the framework to be welded.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
EP09380034A 2008-02-28 2009-02-27 Element de soutien de barres ayant une extrémité recourbée dans un dispositif d'amenée vers une machine de soudage Withdrawn EP2095891A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES200800668A ES2306617B1 (es) 2008-02-28 2008-02-28 Dispositivo de soporte para un alimentador de varillas con pata para alimentar una estacion de soldadura y alimentador correspondiente.

Publications (1)

Publication Number Publication Date
EP2095891A1 true EP2095891A1 (fr) 2009-09-02

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EP09380034A Withdrawn EP2095891A1 (fr) 2008-02-28 2009-02-27 Element de soutien de barres ayant une extrémité recourbée dans un dispositif d'amenée vers une machine de soudage

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EP (1) EP2095891A1 (fr)
ES (1) ES2306617B1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987005544A1 (fr) * 1986-03-20 1987-09-24 Guy Lafon Machine integree flexible, pour fabriquer automatiquement des armatures metalliques, notamment pour le beton arme
FR2732392A1 (fr) * 1995-03-28 1996-10-04 Rech Ody Soc Civ De Procede et dispositif de fabrication d'armatures, en particulier pour beton arme

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1694081A (en) * 1924-08-13 1928-12-04 Reed William Edgar Electric welding machine
IT1288852B1 (it) * 1996-02-22 1998-09-25 Piegatrici Macch Elettr Procedimento per la realizzazione di gabbie metalliche per cemento armato e relativo dispositivo
ITBO20010398A1 (it) * 2001-06-22 2002-12-22 Schnell Spa Metodo e apparecchiatura per realizzare gabbie metalliche per cementoarmato e gabbia metallica cosi' ottenuta
ES2264640B1 (es) * 2005-06-17 2007-12-01 Ferraplana, S.L. Equipo automatico para la fabricacion de armaduras metalicas.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987005544A1 (fr) * 1986-03-20 1987-09-24 Guy Lafon Machine integree flexible, pour fabriquer automatiquement des armatures metalliques, notamment pour le beton arme
FR2732392A1 (fr) * 1995-03-28 1996-10-04 Rech Ody Soc Civ De Procede et dispositif de fabrication d'armatures, en particulier pour beton arme

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Publication number Publication date
ES2306617B1 (es) 2009-10-09
ES2306617A1 (es) 2008-11-01

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