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EP2374553B1 - Dispositif et procédé de cintrage de barres avec alimentation automatique des barres - Google Patents

Dispositif et procédé de cintrage de barres avec alimentation automatique des barres Download PDF

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Publication number
EP2374553B1
EP2374553B1 EP11160005.2A EP11160005A EP2374553B1 EP 2374553 B1 EP2374553 B1 EP 2374553B1 EP 11160005 A EP11160005 A EP 11160005A EP 2374553 B1 EP2374553 B1 EP 2374553B1
Authority
EP
European Patent Office
Prior art keywords
bars
magazine
receiving space
bending
plant according
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.)
Active
Application number
EP11160005.2A
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German (de)
English (en)
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EP2374553A1 (fr
Inventor
Stefano Peruzzo
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.)
OSCAM Srl
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Oscam Srl
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Publication date
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Publication of EP2374553A1 publication Critical patent/EP2374553A1/fr
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Publication of EP2374553B1 publication Critical patent/EP2374553B1/fr
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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
    • B21F23/00—Feeding wire in wire-working machines or apparatus
    • B21F23/005—Feeding discrete lengths of wire or rod
    • 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
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/006—Feeding elongated articles, such as tubes, bars, or profiles

Definitions

  • the present invention relates to plants for bending metal bars, in particular bars designed for reinforcing concrete, of the type comprising:
  • a device for transferring metal bars of the type specified above is, for example, described in the patent No. IT-B-1 351 915 filed in the name of the present applicant, as well as in document EP-A1-0 564 446 on which the preamble of the independent claims 1 and 18 is based, as well as in document EP-A1-0 419 441 .
  • Systems of automatic loading of metal bars on machines designed for executing operations of various types on said bars are known from a wide range of documents, such as for example DE-AS-1 101 336 , IT 1 206 893 , EP-A-1 356 875 , EP-A-1 356 876 , EP-A-1 980 341 , EP-A-2 172 287 .
  • the object of the present invention is to provide automatic loading of a predetermined number of metal bars onto one or more bending units of the type referred to at the start, guaranteeing that said operation is performed in a reliable, correct, and orderly way.
  • the subject of the invention is a plant of the type referred to at the start, characterized in that the aforesaid transfer means are designed to pick up a predetermined number of bars from the magazine and to feed them one after another into said receiving space, keeping them separate and at a distance apart from one another at least in a final step of their being conveyed into the receiving space so as to cause them to reach the receiving space in times that are close to one another but distinct.
  • the plant comprises an intermediate workstation for receiving the bars, set at the side of said at least one bending unit and pre-arranged for receiving the bars picked up from the magazine, said plant comprising means for feeding the bars in succession, one at a time, from said intermediate workstation to said receiving space on said at least one bending unit, displacing the bars in a direction transverse to their longitudinal direction.
  • the transfer means further comprise means for drawing longitudinally the bars picked up from the magazine so as to separate them completely from the bundle in the magazine and deposit them on said intermediate receiving workstation.
  • the means for feeding the bars to said receiving space comprise a sliding plane, via which the bars are made to roll by gravity until they reach the receiving space, a compartment feeder being provided for bringing said bars onto said sliding plane.
  • the transfer means further comprise:
  • the subject of the invention is also a method for automatic loading of the bars implemented in the plant according to the invention.
  • the reference number 1 designates as a whole a plant designed to pick up a predetermined number of metal bars automatically from a magazine M and feed them in the operative position onto two bending units 2.
  • the magazine M is constituted by any structure, whether stationary or mobile on wheels, in which a plurality of bars B are set in a bundle.
  • the structure of the magazine M is not described or illustrated herein in order to simplify the drawings, also in view of the fact that, as has been said, it can be obtained in any known way.
  • each bending unit 2 (see also Figure 1D ) comprises a supporting structure 3, rotatably mounted on which is a bending disk 4 having a central spindle 5 and bearing an eccentric pin 6 for bending a portion of one or more bars B around the central spindle 5.
  • the axis 4A ( Figure 1D ) of the bending disk 4 is inclined with respect to the vertical direction.
  • said axis is oriented vertically or horizontally, as is also well known in the art.
  • the two bending units 2 define a space 8 for receiving the bars to be bent, in which a number of bars can be received set on top of one another in a plane orthogonal to the plane of bending of the bars.
  • the two bending units 2 are mobile on rails 9 in the direction A parallel to the longitudinal direction of lie of the bars B.
  • each bending unit provided within the casing 3 of each bending unit are motor means designed to govern the movement of the bending units along the rails 9.
  • the motor means could also be situated on the outside of the bending units, as is well known from the prior art.
  • the plant is provided with an electronic control system that governs, according to a pre-set program, the successive movements of the bending units 2 and of the corresponding bending disks 4 to obtain the various bends of a bar or of a set of bars simultaneously subjected to bending, with a view to obtaining any predetermined shape.
  • the bending units 2 can be of the type illustrated in Figures 1B, 1C , 1D , with a spindle 5, around which the bars are bent, and with the contrast element 7, or else of the type with a spindle having a diametral split, which also defines the space for receiving the bars. In this case, one of the portions will possibly function also as a contrast element.
  • Figure 1B shows the bar, or bars, positioned on the bending units before execution of a bending operation
  • Figure 1C shows the two bending units after the bending disks 4 have been turned simultaneously through 90° to carry out two 90° bends at the ends of the bar or bars B.
  • Figure 2 shows at an enlarged scale and in side view an embodiment of the stationary structure 30 (see also Figure 1A ), on which the two bending units 2 move, defining an inclined plane P coinciding with the plane of bending of the bars defined by the two bending units. Also visible in said figure is one of the two contrast elements 7 associated to one of the two bending units.
  • the structure 30 bearing the two bending units 2 is set alongside a further stationary bench 10 bearing the unit for feeding the bars to the receiving space 8 defined by the two bending units.
  • the stationary structure 10 supports in an articulated way a longitudinal distribution of transverse arms 11 (see also Figure 1A ), defining an inclined plane Q, via which the bars B are made to roll by gravity as far as the receiving space 8 defined by the bending units.
  • the fundamental characteristic of the plant according to the invention lies in the fact that it is able to pick up from the magazine M a predetermined number of bars and to feed said bars one after another into the receiving space 8 of the bending units, keeping them separate and set at a distance from one another in such a way as to cause them to reach the receiving space in times that are close to one another but distinct.
  • Figure 2 shows four bars B whilst they are rolling towards the receiving space 8 of the bending unit (not visible in Figure 2 ) in positions appropriately separated and set at a distance apart from one another.
  • the angle of inclination of the transverse arms 11 can be controlled by means of a fluid cylinder 12.
  • a fluid cylinder 12 it is possible to envisage a raised condition of the arms 11 in order to prevent any kind of interference between these and the bars that are undergoing bending in the bending units.
  • the bars B are fed to the plane Q by means of a longitudinal distribution of chain conveyors 14 (see also Figure 1A ) each provided with a number of projecting elements 14a that define separate compartments 14b (see Figure 3 ).
  • the compartments 14b of the feed device defined by the chain conveyors 14 are each fed with a single bar (see Figure 2 ) by means of a longitudinal distribution of oscillating arms 15, which are mounted articulated in 16 to the structure 10 and driven by means of fluid cylinders 17 (see Figure 3 ).
  • Operation of the actuators 17 causes raising of the arms 15 from the position illustrated in Figure 3 to a raised position in such a way that they pick up a bar B that each time is located in a receiving channel 18 ( Figure 3 ) and cause it to roll into a respective compartment 14b of the feed device constituted by the chain conveyors 14.
  • the receiving channel 18 constitutes an intermediate workstation designed to receive the bars picked up and from which said bars are then transferred to the feed assembly, designed for feeding the bars in succession, one at a time, to the bending units.
  • said channel could be defined by trains of rollers, or similar means, designed to bring the bars into a receiving position, from which they can be transferred to the aforesaid feed assembly.
  • Figure 4 shows a perspective view of the assembly of Figures 2 and 3
  • Figure 5 shows a perspective view of the detail of the receiving channel 18, the walls of which are interrupted by grooves for the passage of the arms 15.
  • the bars picked up from the magazine reach separately, one at a time, the receiving channel 18, as will be described in detail in what follows.
  • a bar B When a bar B reaches the receiving channel 18 it is set so as to be correctly positioned with respect to the bending units 2. Since bars of different length are envisaged, each bar, when it reaches the channel 18, is displaced longitudinally until the correct position is reached.
  • provided along the bottom of the channel 18 are openings, slidably mounted in which are plates 19 on which the bars abut, governed by fluid cylinders 20 (see Figure 3 ).
  • Figure 5 shows the spaces provided in the bottom of the channel 18 within which the plates 19 can be displaced. Advance of the bars along the bottom of the channel 18 is obtained by means of motor-driven rollers. It should be noted that abutment of the bars is optional; for example, in the cases where one of the bending units is fixed, it is not necessary to provide any abutment.
  • the bars B reach the channel 18 one at a time and separately, coming from a top channel 21 ( Figure 3 ), the bottom of which is defined by a plane 22 articulated about a longitudinal axis 23, which be lowered by means of a fluid cylinder 24 to bring about dropping of the bar that each time is located in the channel 21 into the receiving channel 18.
  • the loading device 300 designed for automatically picking up a predetermined number of bars from the magazine M and feeding them in succession, one after another, separately, to the channel 21 that may be seen in Figure 3 .
  • the device 300 has a supporting frame 25, which is in turn supported on a structure 26 ( Figures 4 , 6 and 7 ) set at one end of the stationary structure 10.
  • Figures 8 , 9 and 10 show separately three assemblies forming part of the device 300.
  • the reference number 26 designates as a whole an assembly for picking up the bars by means of a magnet, comprising a permanent magnet 27 (or else an electromagnet) supported in an oscillating way about a horizontal axis beneath a supporting block (not visible in the drawing), which is in turn guided in a horizontally sliding way within a supporting element 28.
  • a permanent magnet 27 or else an electromagnet
  • This enables the magnet 27, when it picks up a portion of bar B and lifts it (see Figures 11A and 11B ), to tilt according to the inclination assumed by one end portion of the bar and at the same time recede with respect to the block 28 ( Figure 11B ) as a result of the resistance opposed by the bar B.
  • the block 28 is set at the end of a stem 29 (see Figure 11A ) of a fluid actuator 30, the top end of which is anchored to the cross member of a portal structure 31 secured to the frame of the device.
  • Figure 9 illustrates in perspective view an assembly for moving the bars B, comprising a gripping device 32 governed electrically and carried by a slide 33 mounted so that it slides vertically on guides 34.
  • the vertical movement of the slide 33 is driven by a motor 35 by means of an external-screw/internal-screw transmission.
  • the guides 34 and the motor 35 are carried by a structure 36, which is in turn mounted like a slide in a horizontal direction transverse to the longitudinal direction of the bars, on guides 37 carried by a plate 38 secured to the stationary structure of the device.
  • the horizontal movement of the slide 36 on the guides 37 is governed by a fluid actuator 39.
  • FIG 10 is a perspective view of an assembly for longitudinal feeding of the bars, which uses a roller feed device.
  • Said assembly designated as a whole by the reference number 40, comprises a stationary supporting structure 41, mounted on the bottom of which are motor-driven rotating rollers 42, driven via a chain transmission 43 by an electric motor 54 (see Figure 11A ).
  • the bars are designed for being received one at a time on the bottom motor-driven rollers 42, and being contained in said disposition between the sides 44 of a channel 45, the bottom wall of which 46 is interrupted to enable the bottom rollers 42 to project above it.
  • the magnet 27 of the pick-up assembly 26 is lowered until it comes into engagement with one or more bars B (just one bar is illustrated for reasons of clarity in Figure 11A ), which are present in the magazine M (illustrated only schematically in Figure 11A ).
  • the magnet 27 is then raised, taking along with it one or more bars B as far as the restricted passage 50.
  • the presence of said passage means that just one bar manages to remain attached to the magnet 27 after this has overstepped the position corresponding to the restricted passage 50.
  • the single bar B that has remained attached to the magnet 27 (which in the mean time has assumed its retracted and inclined position) reaches a first raised position, which is represented in Figure 11B .
  • the gripper 32 of the gripper assembly is already in a lowered position, suitable for gripping another portion of the same bar B.
  • the gripper 32 is in particular governed in said lowered position by the electronic control means of the plant, which have instructions for the governed positions of the gripper, which depend upon the diameter and the length of the different types of bars that are being handled.
  • associated to the gripper are the sensor means for sending a signal to the electronic control unit of the plant whenever it receives a bar in it. In this way, the system is able to count the bars picked up, as these reach the gripper, so as to verify that any chosen number of bars is fed.
  • the means for counting the number of bars picked up could also be altogether different and arranged in other points of the plant. It should be noted that, as soon as the sensor means associated to the gripper detect the presence of a bar, the magnet 27 is deenergized (or else shielded, or, in general, any other intervention is made, such as a mechanical action of thrust, that will enable detachment of the bar) in order to release said bar to the gripper 32.
  • FIG 11C the gripper 32 is then displaced transversely until the bar B is brought over the channel 45 so as to be able to unload it thereon.
  • Figure 11D shows the step in which the gripper 32 has opened and the bar B is dropping into the channel 45 onto the bottom motor-driven rollers 42. At this point, the top rollers 46 are lowered to press the bar B, or rather the portion of bar that has been previously gripped by the magnet 27, onto the bottom motor-driven rollers 42.
  • the rollers 42 and 46 are thus able to feed the end portion of the bar B previously gripped longitudinally forwards, in the direction X as shown in Figure 11F so as to separate the bar B completely from the bundle in the magazine M and feed it on the channel 21 ( Figure 3 ), as has been described above.
  • the magnet 27 returns in the mean time into its lowered position for picking up an end portion of a new bar B from the magazine M.
  • the magnet 27 is displaced alternately between its lowered position and its raised position whenever the plant has to operate for feeding a predetermined number of bars to the bending units, said operation carrying in succession one bar at a time as far as the channel 21 from which the bar, as soon as it is received in the channel 21, is dropped into the receiving channel 18. Consequently, also the receiving channel 18 receives the bars in succession, one after another and separately.
  • the abutment plate 19 corresponding to the length of bar is activated, and the bar is fed longitudinally until one end thereof comes into contact with the abutment plate 19, which thus ensures that the bar is positioned longitudinally along the channel 18 in an adequate way for subsequently undergoing treatment in the bending units 2.
  • the bar has each time been correctly positioned longitudinally in the receiving channel 18, it is transferred by raising of the arms 15 ( Figure 3 ) into a corresponding compartment 14B of the feed device constituted by the chain conveyors 14.
  • the feed device 14 is then fed with a plurality of bars B, each compartment 14 B of the device receiving a single bar, as illustrated in Figure 2 .
  • the plant according to the invention is able to pick up from the magazine M any given number of bars and to feed them into the receiving space 8 defined by the two bending units keeping them appropriately separate and set at a distance apart in such a way as to cause them to reach the receiving space in times that are close to one another but distinct.
  • the speed of the chain elevators and the inclination of the sliding arms are chosen in such a way that the bars roll on the arms as far as the receiving space, remaining at a distance apart from one another so as to reach the receiving space in times that are very close to one another but distinct.
  • the control means of the plant described herein which could for example be electronic control means, are designed to control said transfer means in such a way as to pick up a predetermined number of bars from the magazine M and feed them one after another into the receiving space of the bending unit, keeping them separate and at a distance apart from one another at least in a final step of conveying into the receiving space so as to cause them to reach the receiving space in times that are close to one another but distinct.
  • the electronic control means are designed to govern the transfer means in such a way that the bars are unloaded into the aforesaid receiving space at an appropriate time interval between one bar and the next. As emerges from the foregoing, said interval is chosen so as to be sufficiently long to prevent any entangling between successive bars, but at the same time as short as possible to enable loading in a short time of big lots of bars.
  • the electronic control means of the plant described herein are designed to determine the aforesaid interval according to the type of bars to be loaded (for example, according to their diameter, length, and/or mechanical characteristics).
  • the present applicant has in fact found that, when the bars are unloaded into the receiving space of the bending unit, these, bumping against the surfaces of said unit, tend to bounce and oscillate like a cord, and the ease with which they get entangled or bestraddle one another depends precisely upon how marked is their behaviour.
  • the electronic control means will govern the transfer means so as to envisage longer intervals for unloading in succession, into the receiving space, the more flexible bars, and then shorter intervals for unloading in succession the stiffer bars.
  • Said preferred control mode makes it possible to reduce as much as possible, for every type of bar, the times of loading onto the bending unit, without any entanglement of the bars being loaded.
  • control means can be provided for determining the aforesaid interval also according to other variables that are not directly linked to the type of bars but do, however, have some influence on the phenomenon of entangling between the bars, such as for example the mutual position between the bars and the elements of the bending unit upon which the bars come to bear when they are unloaded onto the bending unit (for example, the spindles 5). Also in this case, the shorter the interval the higher the risk of the bars bestraddling one another.
  • the electronic control means can also envisage a single interval for a number of types of bars.
  • said interval will, for example, be determined according to the most flexible type of bar or the bar that requires the longest time interval to prevent any bestraddling of the bars during loading onto the bending units. Thanks to the aforesaid characteristics, the plant according to the invention guarantees that the operation of loading of the bars on the bending units is executed always in a correct and orderly way, without any risk of bestraddling of the bars or jamming thereof at the mouths of the receiving space on the bending units, as instead occurs in plants according to the known art.
  • the bar-feed assembly can envisage one of the following alternative embodiments:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Wire Processing (AREA)

Claims (25)

  1. Dispositif de cintrage de barres métalliques, et en particulier de barres conçues pour renforcer du béton, du type qui comprend :
    - au moins une unité de cintrage (2) qui définit un plan de cintrage (P) et un espace (8) destiné à recevoir un certain nombre de barres à cintrer, placées parallèlement les unes aux autres et les unes sur les autres sur un plan orthogonal par rapport au plan de cintrage,
    - des moyens (26, 32, 40, 22, 15, 14, 11) destinés à transférer les barres depuis un magasin de barres, dans lequel les barres sont disposées en un faisceau à l'intérieur dudit espace de réception sur ladite unité de cintrage ; et
    - des moyens de commande desdits moyens de transfert,
    ledit dispositif étant caractérisé en ce que lesdits moyens de commande sont conçus pour contrôler lesdits moyens de transfert de façon à attraper un nombre prédéterminé de barres dans le magasin (M) et à les fournir les unes après les autres audit espace de réception (8), en les maintenant séparées et à une distance les unes des autres au moins à une étape finale d'acheminement vers l'espace de réception (8) de façon à ce qu'elles atteignent l'espace de réception à des moments qui sont proches les uns des autres mais distincts.
  2. Dispositif selon la revendication 1, caractérisé en ce qu'il comprend un poste intermédiaire (18) destiné à recevoir les barres, ledit poste intermédiaire (18) étant placé le long de ladite unité de cintrage (2) et prédisposé pour recevoir les barres attrapées dans le magasin (M), ledit dispositif comprenant un moyen (14) destiné à fournir les barres les unes après les autres, une par une, entre ledit poste intermédiaire (18) et ledit espace de réception sur ladite unité de cintrage, en déplaçant les barres dans une direction transversale par rapport à leur direction longitudinale.
  3. Dispositif selon la revendication 2, caractérisé en ce que ledit poste de réception intermédiaire (18) comprend un canal de réception.
  4. Dispositif selon la revendication 2 ou 3, caractérisé en ce que lesdits moyens de transfert comprennent en outre un moyen (40) destiné à tirer longitudinalement les barres attrapées dans le magasin (M) de façon à les séparer entièrement du faisceau dans le magasin, et à les déposer sur ledit poste de réception intermédiaire.
  5. Dispositif selon la revendication 4, caractérisé en ce que ledit moyen de transfert comprend en outre :
    - un moyen (26) destiné à attraper une ou plusieurs barre(s) dans le magasin, en attrapant une partie de celles-ci ; et
    - un moyen (32) destiné à déplacer les parties des barres attrapées dans une direction transversale par rapport à la direction longitudinale des barres, et à libérer les parties d'un nombre prédéterminé de barres les unes après les autres, une par une, vers le moyen destiné à tirer les barres longitudinalement.
  6. Dispositif selon la revendication 4, caractérisé en ce que ledit moyen de transfert comprend en outre :
    - un moyen (26) destiné à attraper une ou plusieurs barres dans le magasin, en attrapant une partie de celles-ci et en amenant les parties attrapées dans une première position surélevée ;
    - un moyen (32) destiné à déplacer les unes après les autres, une par une, les parties des barres attrapées de ladite première position surélevée à une seconde position surélevée, décalée par rapport à la première position surélevée dans une direction transversale par rapport à la direction longitudinale des barres, et à libérer lesdites parties, dès qu'elles atteignent ladite seconde position surélevée, vers le moyen destiné à tirer les barres longitudinalement.
  7. Dispositif selon l'une quelconque des revendications 4 à 6, caractérisé en ce que ledit moyen (40) destiné à tirer les barres est conçu pour envoyer les barres les unes après les autres, une par une, vers ledit poste intermédiaire.
  8. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend une unité de découpe en amont de ladite unité de cintrage.
  9. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit moyen destiné à fournir les barres audit espace de réception comprend un plan de glissement (11), grâce auquel les barres roulent par gravité jusqu'à ce qu'elles atteignent l'espace de réception, un dispositif d'alimentation à compartiments (14) étant prévu pour amener lesdites barres sur ledit plan de glissement.
  10. Dispositif selon l'une quelconque des revendications 1 à 8, caractérisé en ce que ledit moyen destiné à fournir les barres audit espace de réception comprend un plan incliné (11), grâce auquel les barres roulent par gravité jusqu'à ce qu'elles atteignent l'espace de réception, au moins un rouleau rotatif étant prévu pour amener lesdites barres sur ledit plan incliné, ledit rouleau étant placé dans une direction transversale par rapport à la direction longitudinale des barres, et ayant une partie hélicoïdale le long de sa surface extérieure, prédisposée pour s'engager avec une partie des barres afin de déplacer ladite partie le long de l'axe dudit rouleau.
  11. Dispositif selon l'une quelconque des revendications 1 à 8, caractérisé en ce que ledit moyen destiné à fournir les barres audit espace de réception comprend un plan incliné (11), grâce auquel les barres roulent par gravité jusqu'à ce qu'elles atteignent l'espace de réception, un convoyeur à compartiments (14) étant prévu pour amener lesdites barres sur ledit plan incliné.
  12. Dispositif selon l'une quelconque des revendications 4 à 7, caractérisé en ce que ledit moyen destiné à tirer les barres longitudinalement comprend un dispositif d'approvisionnement (40) muni de rouleaux opposés, dans lequel un premier groupe de rouleaux (46) est conçu pour appuyer les barres contre un second groupe de rouleaux (42) destinés à fournir les barres eux-mêmes, au moins un rouleau situé entre lesdits premier et second ensembles étant entraîné par un moteur.
  13. Dispositif selon l'une quelconque des revendications 5 à 7, caractérisé en ce que ledit moyen destiné à déplacer les barres dans une direction transversale par rapport à la direction longitudinale des barres comprend un dispositif de saisie (32) porté par un coulisseau (36) mobile dans une direction transversale par rapport à la direction longitudinale des barres.
  14. Dispositif selon l'une quelconque des revendications 5 à 7, caractérisé en ce que ledit moyen destiné à déplacer les barres dans une direction transversale par rapport à la direction longitudinale des barres comprend au moins un rouleau rotatif, placé dans une direction transversale par rapport à la direction longitudinale des barres, et ayant une partie hélicoïdale le long de sa surface extérieure, prédisposée pour s'engager avec une partie des barres afin de déplacer ladite partie le long de l'axe dudit rouleau.
  15. Dispositif selon l'une quelconque des revendications 5 à 7, caractérisé en ce que ledit moyen destiné à déplacer les barres dans une direction transversale par rapport à la direction longitudinale des barres comprend un convoyeur à chaîne.
  16. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend un ensemble (26) destiné à attraper les barres dans le faisceau de barres dans le magasin, qui comprend un aimant (27) supporté de manière oscillante autour d'un axe horizontal et qui coulisse sur un plan horizontal.
  17. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend un moyen de comptage destiné à fournir un nombre prédéterminé de barres à ladite unité de cintrage.
  18. Procédé de chargement automatique de barres métalliques, et en particulier de barres destiné à renforcer du béton, dans un dispositif de cintrage des barres qui comprend au moins une unité de cintrage (2) qui définit un plan de cintrage et un espace (8) destiné à recevoir un certain nombre de barres (B) à cintrer, placées parallèlement les unes aux autres et les unes sur les autres sur un plan orthogonal par rapport au plan de cintrage,
    dans lequel les barres sont transférées depuis un magasin (M) de barres, dans lequel les barres (B) sont disposées en un faisceau à l'intérieur dudit espace de réception (8) sur ladite unité de cintrage,
    ledit procédé étant caractérisé en ce qu'un nombre prédéterminé de barres dans le magasin (M), et lesdites barres sont fournies les unes après les autres audit espace de réception (8), en les maintenant séparées et à une distance les unes des autres au moins à une étape finale d'acheminement vers l'espace de réception de façon à ce qu'elles atteignent l'espace de réception à des moments qui sont proches les uns des autres mais distincts.
  19. Procédé selon la revendication 18, caractérisé en ce qu'un poste de travail intermédiaire (18) est prévu pour recevoir les barres, le long de ladite unité de cintrage (2), et reçoit les barres attrapées dans le magasin (M), et les fournit les unes après les autres, une par une, entre ledit poste intermédiaire et ledit espace de réception sur ladite unité de cintrage (2), en déplaçant les barres dans une direction transversale par rapport à leur direction longitudinale.
  20. Procédé selon la revendication 19, caractérisé en ce que les barres attrapées dans le magasin (M) sont tirées longitudinalement de façon à les séparer entièrement du faisceau dans le magasin, et à les déposer sur ledit poste de réception intermédiaire.
  21. Procédé selon l'une quelconque des revendications 19 et 20, caractérisé en ce que :
    - une ou plusieurs barres sont attrapées dans le magasin (M) en attrapant une partie de celles-ci ; et
    - les parties des barres attrapées sont déplacées dans une direction transversale par rapport à la direction longitudinale des barres, et les parties d'un nombre prédéterminé de barres sont libérées les unes après les autres, une par une, vers le moyen (40) destiné à tirer les barres longitudinalement jusqu'audit poste intermédiaire (18).
  22. Procédé selon l'une quelconque des revendications 19 et 20, caractérisé en ce que :
    - une ou plusieurs barres sont attrapées dans le magasin en attrapant une partie de celles-ci et en amenant les parties attrapées dans une première position surélevée,
    - les parties des barres attrapées sont déplacées de ladite première position surélevée, une par une, à une seconde position surélevée, décalée par rapport à la première position surélevée dans une direction transversale par rapport à la direction longitudinale des barres, et lesdites parties sont libérées, dès qu'elles atteignent ladite seconde position surélevée, vers le moyen destiné à tirer les barres longitudinalement.
  23. Procédé selon l'une quelconque des revendications 19 à 22, caractérisé en ce que les barres roulent par gravité, le long d'un plan incliné (11), jusqu'à ce qu'elles atteignent l'espace de réception (8), lesdites barres étant amenées les unes après les autres, une par une, sur ledit plan incliné.
  24. Procédé selon l'une quelconque des revendications 18 à 23, caractérisé en ce qu'une étape de découpe des barres est envisagée avant que celles-ci soient fournies à l'unité de cintrage.
  25. Procédé selon l'une quelconque des revendications 18 à 24, caractérisé en ce qu'une étape de comptage des barres à fournir à l'unité de cintrage est envisagée.
EP11160005.2A 2010-04-12 2011-03-28 Dispositif et procédé de cintrage de barres avec alimentation automatique des barres Active EP2374553B1 (fr)

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ITTO2010A000279A IT1399415B1 (it) 2010-04-12 2010-04-12 Impianto per la piegatura di barre metalliche con caricamento automatico delle barre, e metodo di caricamento utilizzato in tale impianto.

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ITTO20130454A1 (it) * 2013-06-04 2014-12-05 Oscam Spa Impianto per il caricamento di un gruppo di barre metalliche
CN104275423B (zh) * 2013-07-01 2016-02-10 南京惠德机械有限公司 一种平面线材半自动弯曲机及其使用方法
CN103406650B (zh) * 2013-07-15 2015-04-29 青岛兴河建材有限公司 方桩钢筋骨架滚焊机钢筋搬运装置
CN110227765B (zh) * 2017-08-22 2020-07-07 浙江龙财塑业有限公司 一种扩管机的精准定位放料机构
IT201800006164A1 (it) * 2018-06-08 2019-12-08 Metodo e apparecchiatura per trasferire ordinatamente elementi di foggia allungata
CN109201905B (zh) * 2018-08-10 2020-04-14 慈溪市天泽厨具有限公司 一种端口机
CN109277439B (zh) * 2018-09-04 2024-05-28 浙江长兴和良智能装备有限公司 一种移料系统、分料系统、排料架及制造d接管的生产线
CN109570396B (zh) * 2019-01-08 2024-03-12 成都固特机械有限责任公司 一种自动上料数控钢筋弯曲中心
CN111644539A (zh) * 2020-06-19 2020-09-11 山西闻舞工贸有限公司 一种组装式全自动钢筋截断机

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