EP1541256B1 - Dispositif automatique d'alimentation pour des treillis métalliques électrosoudés - Google Patents

Dispositif automatique d'alimentation pour des treillis métalliques électrosoudés Download PDF

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Publication number
EP1541256B1
EP1541256B1 EP04024820A EP04024820A EP1541256B1 EP 1541256 B1 EP1541256 B1 EP 1541256B1 EP 04024820 A EP04024820 A EP 04024820A EP 04024820 A EP04024820 A EP 04024820A EP 1541256 B1 EP1541256 B1 EP 1541256B1
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EP
European Patent Office
Prior art keywords
net
nets
pack
stacked
automatic feeder
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Expired - Lifetime
Application number
EP04024820A
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German (de)
English (en)
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EP1541256A1 (fr
Inventor
Claudio Bernardinis
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AWM SpA
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AWM SpA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
    • B21D11/12—Bending specially adapted to produce specific articles, e.g. leaf springs the articles being reinforcements for concrete
    • B21D11/125—Bending wire nets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F33/00—Tools or devices specially designed for handling or processing wire fabrics or the like

Definitions

  • the present invention relates to an automatic feeder for electrowelded metal nets suitable for reinforcing concrete castings, which is suitable to position said nets in an optimum manner at net bending machines, operating by starting from said nets stacked in any manner and/or with methods entailing minimum space occupation, i.e., with longitudinal and/or transverse rods arranged alternately side by side.
  • Said feeder in addition to recognizing in each instance the net when it is gripped, automatically positions said net correctly on the bending unit, also turning it over spatially if necessary.
  • the feeder is capable of operating on large electrowelded metal nets (measuring for example 7 meters in length and 3.6 meters in width).
  • DE-A-3823057 discloses a feeder as indicated in the pre-characterising portion of claim 1.
  • the aim of the present invention is to overcome the drawbacks noted in current apparatuses for working electrowelded metal nets.
  • the object of the invention is therefore to:
  • the aim and object of the present invention are achieved by the feeder according to claim 1, by providing an automatic feeder for electrowelded metal nets that is suitable to work upstream of a bidirectional bending unit or of other automatic machines, and a method according to claim 12.
  • the feeder according to the present invention is an intelligent unit for geometric recognition of electrowelded metal nets that uses electromagnetic methods and/or optical sensors and/or other equivalent systems known to the person skilled in the art.
  • Apparatuses for working electrowelded metal nets can work on nets assembled on-site in-line (and in this case the present invention is unnecessary), or on stacked nets that arrive from other steelworks or other separate apparatuses.
  • the nets due to transportation cost reasons
  • the nets are usually stacked alternately in order to reduce their space occupation for an equal number of nets. They are superimposed and stacked alternately, reducing their volume by up to 50%.
  • This entails, as already mentioned earlier, a waste of time caused by their handling to arrange them with the correct orientation for subsequent work.
  • Automatic net processing machines must in fact be fed with nets that are all arranged with the same orientation, as otherwise the finished product is structurally unsuitable for its final use (for example in the building of frames and lattice-like structures for concrete castings).
  • the automated feeder for haphazardly or alternately stacked metal nets uses, upstream, a static conveyor platform for packs of nets, which acts as a storage system and feeds a platform that can move in a vertical direction and has a function to self-level the upper net of the pack with respect to the horizontal working surface and to the unit for geometric recognition of the net.
  • the unit for geometric recognition of the net can use various known techniques, from the electromagnetic system to the optical system, from the use of presence sensors to pneumatic systems.
  • an electromagnetic system for recognizing the orientation of the nets has been used which is based on a plurality of electromagnets, which are variously arranged on a horizontal surface below a (fixed and/or movable) supporting beam that covers the entire length of the nets.
  • electromagnets cooperate in mutual coordination and are suitable to recognize the presence or absence of the metal rods that constitute the net.
  • the bed that carries the pack of nets rises vertically until it places the first upper net in contact with the lower surface of the electromagnet supporting beam.
  • said bed moves downward slightly, leaving the net attracted by the electromagnets suspended.
  • said electromagnets control the correct positioning of an upper movable arm, which is equipped with automatic pincers capable of gripping, laterally at one end, a single net and more specifically the net identified and kept raised by the electromagnets.
  • the net gripping arm can move and is suspended above the working surface and is equipped with appropriate clamps suitable to drag the net horizontally and is actuated in its movements by suitable automation systems.
  • the overturning device is meant to automatically turn the net over through 180° if it is upside-down with respect to the correct subsequent working step.
  • Said device is composed of a plurality of bars arranged on a horizontal rotating surface, which is pivoted laterally about an axis that is parallel to the working axis of the bending machines and is perpendicular to the advancement direction of the nets.
  • the bars that form the supporting surface for the net to be turned over are provided with suitable gripping clamps or with other suitable means (for example electromagnets) in order to retain the net during overturning.
  • the feeder as described is capable of feeding and prearranging the net automatically in the intended spatial orientation, regardless of its initial arrangement, upstream of a working machine or of a bending unit, of a simple type or of the type composed of two mutually opposite automatic bending machines that can be moved in a programmable manner as regards distance with respect to each other.
  • the automatic feeder for electrowelded nets is arranged upstream with respect to the two mutually opposite movable bending machines 8 and 9 and downstream with respect to the conveyor 1 of the packs of variously stacked electrowelded metal nets 3 that arrive from production facilities that are external to the working apparatus or are produced directly in-line or not in-line.
  • the net working apparatus as shown in Figure 1 is in turn provided with a particular conveyor unit 2 for packs 3 of nets, with a vertically movable supporting surface, which is also capable of arranging the nets so that they are aligned along an abutment plane, and a bed or a working surface 12 for the transit of the nets, which lies transversely with respect to the work advancement direction of said nets.
  • overhead carriages that support arms with automatic net gripping clamps-4; a carriage with an automatic arm 5 upstream of the bending machines 8 and 9, for serving a net recognition device 16, with three-dimensional movements; a carriage with a beam that supports automatic grip clamps 6, with movement on a vertical plane, and which is arranged between the two mutually opposite movable bending machines and serves them; and finally a carriage with an automatic arm 7, downstream of the bending machines, with three-dimensional movements, for serving the evacuation of the products.
  • the automatic feeder for electrowelded metal nets consists of a bed 2 of the conveyor unit for conveying packs of variously stacked nets 3, which is capable of moving the nets in the work direction of the apparatus and at the same time of aligning them on a vertical plane, formed by the static work bed 12 and arranged transversely to the work flow.
  • Said conveyor bed 2 can also move vertically in order to lift and/or lower the pack of nets on command with respect to the net recognition devices 16 (of the electromagnetic, optical or other equivalent type), supported by a transverse fixed beam 10 that lies above said pack.
  • the geometric recognition of the upper side of the net at the top of the pack of variously stacked nets in fact occurs by means of recognition devices that are arranged on the lower face of the beam 10 and that identify the characteristics of the first upper metal net of the pack and automatically actuate the carriage 5 with the arm 5 equipped with automatic clamps 11 for gripping and moving the net.
  • the automatic feeder since electrowelded metal nets are generally large and can interlock during the preceding step for forming the packs or during their ordinary transport, separate the first upper net from the second underlying one: this occurs by virtue of the intervention of a particular separator unit 14, which can move horizontally on command and is capable of inserting itself below the first upper net 4, which is supported and raised by the clamps of the arm 5, when the bed 2 that conveys the pack of nets 2 moves downward.
  • the horizontal insertion of the wedge-shaped device 14 with multiple aligned elements between the lower surface of the first upper net of the pack and the upper surface of the second net of the pack facilitates the transfer of the recognized net onto the overturning unit (if it is necessary to rotate it through 180°) or by arranging it directly in the correct way on the bending machines 8 and 9.
  • said devices 16 also activate automatically the overturning step of the respective mechanical unit 13.
  • Said overturning unit 13 consists of a plurality of rotating arms, which are pivoted at 17 about a horizontal axis that is perpendicular to the direction of the work flow and which are provided with suitable automatic grip clamps 15 that are capable of retaining the net during the rotation through 180° of the arms to arrange it with the correct orientation on the working surface 12, upstream of the bending machines or directly on them in order to be gripped by the clamps of the vertical movement carriage 8 that serves said machines.
  • the present invention can be applied to serve any other machine for working on electrowelded metal nets, including machines that are different from those considered by way of example in the present application .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
  • Automatic Assembly (AREA)
  • Specific Conveyance Elements (AREA)
  • De-Stacking Of Articles (AREA)
  • Vending Machines For Individual Products (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Claims (12)

  1. Un dispositif automatique d'alimentation pour des treillis métalliques électrosoudés, comprenant :
    au moins un moyen formant banc de convoyeur (2), le moyen formant banc de convoyeur (2) ayant une surface horizontale pour supporter un paquet (3) de treillis empilés et étant adapté pour se déplacer verticalement et horizontalement;
    des moyens (16) pour identifier l'orientation géométrique et/ou la configuration structurelle d'un treillis (4), le treillis (4) étant agencé individuellement ou empilé au-dessus du paquet (3) de treillis empilés,
    des moyens, adaptés pour actionner automatiquement un bras (5) muni de crampons de saisie (11) appropriés, le bras (5) étant adapté pour manipuler le treillis (4) et/ou pour positionner le treillis (4) correctement sur une machine de travail de treillis (8, 9), ou pour placer le treillis (4) sur des moyens (13) pour faire pivoter un treillis, de préférence jusqu'à 180°,
    au moins un moyen formant poutre supérieur (10) s'étendant au-dessus du treillis (4) empilé dans le paquet (3), le moyen formant poutre supérieur (10) étant adapté pour supporter le moyen (16) pour identification, le moyen (16) d'identification étant adapté pour communiquer et actionner, à l'aide de procédés d'automation, le bras (5) avec les crampons de saisie (11), et
    au moins un moyen séparateur (14), le moyen séparateur (14) comprenant un ou plusieurs coins, susceptibles d'être d'insérés d'une position externe à une position à l'intérieur du paquet (3) de treillis empilés.
  2. Le dispositif automatique d'alimentation selon la revendication 1, caractérisé en ce que le moyen (13) pour faire pivoter un treillis comprend au moins une unité (13), pour faire pivoter des treillis sur un angle allant jusqu'à 180° par rapport à une position horizontale, à une position horizontale retournée, l'unité (13) étant formée d'une pluralité de bras supports alignés qui tournent simultanément, sont pivotés autour d'un axe (17) horizontal, sont perpendiculaires à la direction de travail, et sont munis de crampons (15) automatiques pour saisir les treillis devant être retournés.
  3. Le dispositif automatique d'alimentation selon la revendication 1 ou 2, caractérisé par le fait de comprendre en outre des moyens pour coordonner le mouvement d'un premier treillis supérieur (4) du paquet (3), une partie restante du paquet (3) et les moyens séparateur (14), de manière que, lorsque le premier treillis supérieur (4) du paquet (3) est maintenu levé par le bras (5) et que la partie restante du paquet (3) est abaissée, le moyen séparateur (14) soit inséré entre la surface inférieure du premier treillis supérieur (4) levé et la surface supérieure de la partie restante du paquet (3).
  4. Le dispositif automatique d'alimentation selon l'une ou plusieurs des revendications 1 à 3, caractérisé en ce que le moyen formant poutre supérieur (10) est fixe, et en ce que le moyen d'identification (16) comprend des électroaimants (16) ou analogues, de manière à maintenir de façon désolidarisable un premier treillis (4) en une position levée par rapport à la partie restante du paquet (3) des treillis empilés, et pour faciliter l'insertion du coin des moyens séparateur (14) entre un premier treillis supérieur (4) et la partie restante du paquet (3).
  5. Le dispositif automatique d'alimentation selon la revendication 1, dans lequel la machine de travail de treillis (8, 9) est une unité de pliage-cintrage (8, 9), ou dans lequel le moyen (13) de pivotement est une unité de retournement (13), et dans lequel
    le moyen formant poutre supérieur (10) comprend une poutre supérieure fixe qui est horizontale et perpendiculaire au flux de travail et couvre la totalité de l'étendue de la largeur maximale des treillis empilés dans le paquet (3), les treillis étant formés de métal ;
    le moyen (16) d'identification comprenant une pluralité de dispositifs (16) électromagnétiques et/ou optiques, le moyen (16) d'identification dirigeant le bras (5) avec les crampons de saillie (11) pour le transfert subséquent du treillis (4) sur l'unité de retournement (13) ou sur l'unité de coudage-cintrage (8, 9) ou pour un autre traitement ;
    le bras (5) est supporté sur un chariot aérien et est capable de fonctionner dans trois dimensions pour placer le treillis (4) sur l'unité de retournement (13) ou sur une surface de travail (12) disposé en amont de l'unité de coudage-cintrage (8, 9) ou sur l'unité de coudage-cintrage (8, 9) pour travailler des treillis ;
    le moyen séparateur (14) comprend un séparateur (14), la pluralité de coins minces étant alignés à angle droit par rapport au flux de travail des treillis, avec un déplacement horizontal automatique, et capable d'être inséré de la position externe à la position intérieure au paquet (3) des treillis empilés, entre la surface inférieure d'un premier treillis supérieur (4) levé et la surface supérieure d'un deuxième treillis sur le paquet (3), lorsque le premier treillis supérieur (4) du paquet (3) est maintenu levé par le bras (5) et que la partie restante du paquet (3) est abaissée ; et
    l'unité de retournement (13) est adaptée pour faire tourner des treillis sur 180°, d'une position horizontale à une position horizontale retournée vers le bas, l'unité de retournement (13) étant composée d'une pluralité de bras support alignés qui tournent simultanément, sont pivotés autour d'un axe horizontal (17), sont perpendiculaires à la direction de travail, et sont munis de crampons automatiques (15) pour saisir les treillis devant être retournés, et dans lequel
    le dispositif automatique d'alimentation comprend en outre des dispositifs pour vérifier et contrôler la présence d'un treillis dans les différentes étapes d'identification et de manipulation automatisée du treillis métallique électrosoudé.
  6. Le dispositif automatique d'alimentation selon la revendication 1 ou 5, caractérisé en ce que les moyens (16) d'identification sont adaptés pour identifier un treillis empilé au hasard, les moyens (16) d'identification étant de type électromagnétique et/ou optique et/ou mécanique et/ou pneumatique et/ou étant d'un type faisant utilisation de procédés équivalents connus, afin de gérer et de commander les étapes de fonctionnement subséquentes selon la configuration du treillis identifié.
  7. Le dispositif automatique d'alimentation selon la revendication 5, caractérisé en ce que l'unité de retournement (13) effectue automatiquement, selon les instructions reçues des moyens (16) d'identification, la rotation de 180° d'un treillis sur la surface de travail (12) ou directement sur l'unité de coudage-cintrage (8, 9).
  8. Le dispositif automatique d'alimentation selon la revendication 5, caractérisé en ce que le au moins un moyen formant banc de convoyeur (2) comprend au moins un banc (2) mobile, actionné pour le déplacer, en particulier pour le déplacement vertical, par des moyens appropriés de détection de la présence du treillis (4) à proximité de la poutre supérieure (10) fixe.
  9. Le dispositif automatique d'alimentation selon la revendication 1, caractérisé en ce que les moyens formant poutre supérieurs (10) sont fixes ou déplaçables verticalement et/ou horizontalement par rapport au paquet (3) de treillis devant être identifiés.
  10. Le dispositif automatique d'alimentation selon la revendication 1, comprenant en outre un banc de convoyeur (1) horizontal, placé en amont du au moins un moyen formant banc de convoyeur (2).
  11. Le dispositif automatique d'alimentation selon la revendication 5, caractérisé en ce que les paquets (3) de treillis empilés sont agencés sur un banc de convoyeur (1) horizontal en position vertical avec ses côtés agissant comme base support, et dans lequel les treillis individuels sont retournés de 90° un à la fois sur les moyens formant banc de convoyeur (2) pour être ensuite identifiés individuellement ou de manière empilée.
  12. Un procédé de vérification et de contrôle de la présence d'un treillis (4) dans un paquet (3) de treillis métalliques électrosoudés empilés, dans un dispositif automatique d'alimentation selon une ou plusieurs des revendications précédentes, dans lequel les étapes suivantes sont prévues :
    a) en présence d'un paquet horizontal de treillis métalliques électrosoudés, empilés au hasard avec des surfaces adjacentes différentes et/ou identiques, ou bien tous étant empilés avec la même orientation pour le travail subséquent ou la totalité étant empilée avec l'orientation opposée par rapport à l'orientation du travail subséquent, sur les moyens formant banc de convoyeur (2), placement en adhésion des extrémités latérales des treillis et leur alignement le long d'un plan vertical perpendiculaire au flux d'avancement du travail ;
    b) levée dudit paquet (3) des treillis empilés au moyen des moyens formant banc de convoyeur (2), jusqu'à ce que la surface analogue à une grille supérieure d'un premier treillis supérieur (4) à la partie supérieure du paquet (3) empilé adhère à ou s'approche des moyens (16) d'identification ;
    c) une fois que l'identification de la géométrie structurelle de la surface supérieure du premier treillis supérieur (4) en partie supérieure du paquet (3) s'est produite, actionnement du positionnement automatique du bras de dessus (5) pour verrouiller correctement le treillis sur le côté latéral, à angle droit par rapport au flux de travail ; et, en outre, une fois que l'orientation du premier treillis (4) a été identifiée, soit envoi automatique du premier treillis supérieur (4), directement à la machine de travail de treillis (8, 9), soit transfert du premier treillis supérieur (4) sur le moyen (13) de pivotement d'un treillis; et en même temps, actionnement de l'abaissement des moyens formant bande de convoyeur (2) qui supportent le paquet (3) de treillis empilés, en laissant uniquement à la position levée le premier treillis supérieur (4) ayant été identifié ;
    d) lancement du fonctionnement du au moins un moyen séparateur (14), de manière que les coins se déplacent horizontalement d'une position extérieure au paquet (3), en pénétrant entre le premier treillis supérieur (4) suspendu et un deuxième treillis situé sur le groupe abaissé, et transfert du premier treillis supérieur (4) identifié en le traînant avec le bras (5) jusqu'au moyen (13) de pivotement d'un treillis, ou directement à la machine de travail de treillis (8, 9) ;
    e) si la face supérieure du premier treillis supérieur (4) identifié est agencée à l'opposé par rapport à celle, optimale, prévu pour le travail subséquent, transfert et positionnement du premier treillis supérieur (4) sur les bras de retournement du moyen (13) pour retourner un treillis, qui sont équipés de crampons (15) prévus de manière appropriée, ou bien d'autres systèmes équivalents, pour faire tourner le premier treillis supérieur (4) de 180° par rapport au côté qui est perpendiculaire au flux du travail ; et
    f) une fois que la rotation a été effectuée, agencement ensuite du premier treillis supérieur (4) sur des machines de travail de treillis (8, 9) mutuellement opposées, qui sont déplaçables et sont orientées à angle droit par rapport au flux de travail ; et activation subséquente d'un chariot (6) vertical pour les opérations programmées de coudage-cintrage, ou pour un autre travail, et d'un chariot (7) pour évacuer les produits achevés.
EP04024820A 2003-12-10 2004-10-19 Dispositif automatique d'alimentation pour des treillis métalliques électrosoudés Expired - Lifetime EP1541256B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000240A ITUD20030240A1 (it) 2003-12-10 2003-12-10 Alimentatore automatico per reti metalliche elettrosaldate.
ITUD20030240 2003-12-10

Publications (2)

Publication Number Publication Date
EP1541256A1 EP1541256A1 (fr) 2005-06-15
EP1541256B1 true EP1541256B1 (fr) 2008-04-02

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EP04024820A Expired - Lifetime EP1541256B1 (fr) 2003-12-10 2004-10-19 Dispositif automatique d'alimentation pour des treillis métalliques électrosoudés

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EP (1) EP1541256B1 (fr)
AT (1) ATE390971T1 (fr)
DE (1) DE602004012824T2 (fr)
ES (1) ES2305641T3 (fr)
IT (1) ITUD20030240A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2117805B1 (fr) * 1970-12-18 1973-11-30 Bouwstaal Roermond Nv
EP0295448B1 (fr) * 1987-06-16 1992-08-12 IMPIANTI INDUSTRIALI Spa Appareil pour l'empilage de panneaux en treillis
DE3823857A1 (de) * 1988-07-14 1990-01-18 Heinz Ruhl Vorrichtung zum abziehen von baustahlmatten
FR2721640B1 (fr) * 1994-06-28 1996-09-13 Bokobza Galdys Procédé de fabrication d'armatures pour béton armé.
DE19520349A1 (de) * 1995-06-07 1996-12-12 Sket Drahtziehmaschinenwerk Gr Vorrichtung zum Wenden und Stapeln von geschweißten Gittermatten

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ITUD20030240A1 (it) 2005-06-11
ATE390971T1 (de) 2008-04-15
DE602004012824T2 (de) 2009-04-09
EP1541256A1 (fr) 2005-06-15
ES2305641T3 (es) 2008-11-01
DE602004012824D1 (de) 2008-05-15

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