WO2012120361A1 - Dispositif de saisie d'au moins une barre métallique depuis un paquet de barres et procédé de saisie correspondant - Google Patents

Dispositif de saisie d'au moins une barre métallique depuis un paquet de barres et procédé de saisie correspondant Download PDF

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Publication number
WO2012120361A1
WO2012120361A1 PCT/IB2012/000421 IB2012000421W WO2012120361A1 WO 2012120361 A1 WO2012120361 A1 WO 2012120361A1 IB 2012000421 W IB2012000421 W IB 2012000421W WO 2012120361 A1 WO2012120361 A1 WO 2012120361A1
Authority
WO
WIPO (PCT)
Prior art keywords
bundle
bar
bars
disposed
end segment
Prior art date
Application number
PCT/IB2012/000421
Other languages
English (en)
Inventor
Giorgio Del Fabro
Original Assignee
M.E.P. Macchine Elettroniche Piegatrici Spa
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 M.E.P. Macchine Elettroniche Piegatrici Spa filed Critical M.E.P. Macchine Elettroniche Piegatrici Spa
Publication of WO2012120361A1 publication Critical patent/WO2012120361A1/fr

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Classifications

    • 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
    • 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
    • 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
    • B21F23/007—Feeding discrete lengths of wire or rod using pick-up means, e.g. for isolating a predefined number of wires from a bundle

Definitions

  • the present invention concerns a device to automatically pick up at least one or more metal bars from at least a bundle of bars, disposed in at least a container, to make them subsequently available to a working machine such as a bracket- making machine, a bending machine, a shaping machine, a binding machine or other type of similar machine.
  • a working machine such as a bracket- making machine, a bending machine, a shaping machine, a binding machine or other type of similar machine.
  • the present invention also concerns the corresponding removal method to pick up the bars.
  • Machines for working metal bars are known, which work one or more bars at a time, for example to make shapes for the building trade or other types of product.
  • Such machines are served by storage zones which normally have one or more containers, for example disposed on transfer trolleys, in which the bundles of bars are disposed and from which they are picked up on each occasion to be sent for working.
  • the pick-up operation is carried out manually by an operator and requires a considerable effort from him, with the risk that he might get hurt and also slowing the operative cycle, thus reducing the productivity of the subsequent workings.
  • a machine which comprises lifting means which lift a plurality of bars from a bundle, gripping them near their center line.
  • extractor means which comprise two rollers mounted on guides which are disposed parallel to the extension of the bundle of bars and on a plane coinciding with the lifting plane of the bars when using magnetic lifting means.
  • the two rollers disposed respectively on one side and the other of the lifting mean, are then moved reciprocally away, and with respect to the lifting means, along the guides, to progressively release also the end segments of the bars which may be twisted in the bundle.
  • the known device however, has the disadvantage that, during the movement of the rollers, the bars can be released only at one end, while the other end may remain jammed in the bundle, causing an unbalancing of the bar, which can take it into a condition of interference with parts of the device. In some cases the operator may be required to intervene, in order to reestablish the correct functioning conditions.
  • Another disadvantage of the known machine is that, because of the great effort which is needed to extract the bar from the bundle, the latter can be deformed in an irregular way with respect to its rectilinear extension.
  • One purpose of the present invention is to obtain a device to pick up at least one bar from the bundle which automates the extraction, without requiring the intervention of an operator, which is simple, economic, needs little or no maintenance and has a reduced initial investment.
  • Another purpose of the present invention is to obtain a device which allows the extraction of bars from the bundle without the use of excessive efforts and with reduced cycle times.
  • Another purpose of the present invention is to pick up the bars even two or more at a time, preventing them from being subjected to deformation that could reduce them to a deformed condition.
  • Another purpose is to perfect a method to pick up automatically at least one bar from a bundle of bars and make it available to a working machine while maintaining the bar in any case rectilinear.
  • the Applicant has devised, tested and embodied the present invention to overcome the shortcomings of the state of the art and to obtain these and other purposes and advantages.
  • a device to pick up at least one bar from a bundle of bars comprises at least a lifting unit suitable to lift at least an end segment of the bar with respect to the bundle, and an extractor unit suitable to extract the bar, the end of which is held raised by the lifting unit, from the bundle.
  • the lifting unit comprises at least gripping and retaining means suitable to retain at least the end segment of the raised bar at least temporarily, and drawing means able to move the bar, the end of which is held raised by the lifting unit, in a first direction
  • the extractor unit comprises a plurality of extractor elements suitable to be moved, in at least an operating condition thereof, between the bars of the bundle stationary in the container and the raised end segment of the bar to be picked up, and to be then progressively moved in a second direction opposite to the first direction, that is, away both from the raised end of the bar and from the lifting unit, moving toward an end of the bar opposite to the raised end segment.
  • the extractor element or elements can progressively release the whole segment of the bar still inside the bundle, raising it, while the drawing means of the lifting unit move the bar in the first direction opposite the second direction of movement of the extractor elements. Therefore, according to the invention, after the lifting of the end of the bar, the latter is also progressively extracted from the bundle making it slide longitudinally to its longitudinal extension, in this way preventing any deformations thereto, reducing the cycle time and the stresses and the friction to which the extractor elements are subjected as they move along the bar.
  • the extractor unit comprises transmission members such as belts, chains or suchlike, disposed at the sides of the bundle of bars, suitable to support the extractor elements so that they extend substantially transversely with respect to the longitudinal extension of the bundle, and suitable to move the extractor elements in a selective manner in order to take them respectively from below to above the bundle and vice versa, in a travel around the end segment of each of the bars disposed in the bundle.
  • transmission members such as belts, chains or suchlike, disposed at the sides of the bundle of bars, suitable to support the extractor elements so that they extend substantially transversely with respect to the longitudinal extension of the bundle, and suitable to move the extractor elements in a selective manner in order to take them respectively from below to above the bundle and vice versa, in a travel around the end segment of each of the bars disposed in the bundle.
  • the extractor elements comprise idle rollers associated with transmission members, along which the bars can slide. This further reduces the friction between the extractor elements and the bar as its extraction from the bundle gradually proceeds.
  • the rolls when disposed above the bundle the rolls define an inclined plane with an inclination which allows to unload the bar, once it has been completely extracted from the bundle, toward an unloading zone where subsequently, using other movement means, the bars picked up are made available for subsequent workings.
  • an inclined plane is disposed downstream of the lifting unit, and it is able to receive at least a part of the completely extracted bar when moved by the drawing means, and to unload it toward the unloading zone.
  • the gripping means are chosen from a group comprising at least a magnetic element and mechanical grippers.
  • the present invention also concerns the corresponding method for picking up at least one bar from a bundle of bars, which comprises at least a step of lifting at least an end part of the bar and at least a step of extracting the bar from the bundle.
  • the bar is lifted at least partly, gripping it by means of a lifting unit in proximity to an end segment thereof, and made to move in a first direction by means of a drawing unit, while, during the extraction step, a plurality of extractor elements are disposed between the bundle and the end segment which was lifted during the lifting step, and are moved in a second direction, opposite to the first direction, away from both the end segment and from the lifting unit toward an end of the bar opposite to the end segment.
  • the extractor elements disposed transversely to the longitudinal extension of the bundle, are moved by means of transmission members such as belts, chains or suchlike, which are disposed at the sides of the bundle, respectively from below to above the bundle and vice versa, in a travel around the end segment of each of the bars which are disposed in the bundle.
  • the extractor elements define a plane inclined toward the unloading zone, and after the extraction step the bar is unloaded due to gravity toward the unloading zone.
  • - fig.1 is a three dimensional view of the device to pick up at least a metal bar according to the present invention
  • - fig. 2 is a three dimensional view of a detail of fig. 1 ;
  • - fig. 3 is a perspective view of the device in fig. 1 in a first operating configuration
  • - fig. 4 is a perspective view of the device in fig. 1 in a second operating configuration
  • - fig. 5 is a perspective view of the device in fig. 1 in a third operating configuration
  • - fig. 6 is a perspective view of the device in fig. 1 in a fourth operating configuration
  • - fig. 7 is a perspective view of the device in fig. 1 in a fifth operating configuration.
  • a device to pick up at least one metal bar B is indicated in its entirety by the reference number 10 and comprises, in its essential parts, a store 1 1 containing a plurality of bundles F of metal bars B, a lifting unit 12 to lift an end segment 25 of at least one of the bars B, an extractor unit 13 to extract the bar B from the bundle F, and an unloading zone 15 to unload the bar.
  • the store 1 1 comprises, in a known manner, a plurality of sacks 16 inside which the bundles F, in this case six, are disposed parallel to each other.
  • end segments 25 of the bars of the bundle F facing toward the lifting unit 12 are disposed cantilevered so that due to their own weight they bend downward.
  • the lifting unit 12 comprises gripping and retaining means suitable to lift and retain at least temporarily the raised end segment 25, and drawing means 33 suitable to move the raised bar B in a first direction of feed Dl .
  • a bearing structure 17 is suitable to support not only some of the sacks 16 containing bundles F, but also the extractor unit 13 and the lifting unit 12.
  • the bearing structure 17 extends longitudinally for about two thirds of the overall length of the bundles F, covers the entire width of the store 11 and is disposed so that at least the end segments 25 of the bundles F are comprised inside its overall bulk.
  • the bearing structure 17 comprises a first side 23 and a second side 24, disposed in proximity to, and substantially at the same height as, the unloading zone 15, and having a height reduced with respect to the first side 23.
  • the extractor unit 13 is associated to the bearing structure 17, and comprises, on each side 23 and 24 of the bearing structure 17, a transmission member, in this case a chain 19 on which a plurality of supports 20 are attached, in this case four, suitable to support, in an idle manner, with the mating supports 20 disposed on the opposite side of the bearing structure 17, rollers 21a, 21b, 21c, 2 Id which extend transverse to the extension of the bundle F and for the entire width of the store 1 1.
  • the chain 19 is mounted sliding on toothed wheels 22 and is driven in a known manner by motor members not shown in the drawings.
  • rollers 21a, 21b, 21c, 21d are selectively movable in a second direction of feed D2, parallel to the extension of the bearing structure 17 in an alternate manner, so as to be disposed either above or below the bundles F.
  • the rollers 21a, 21b,21c, 2 Id may be translated from a position in which they are under the bundles F, to a position in which, passing at the side of the end segments 25 of the bars B, they are taken above the bundles F.
  • the second direction of feed D2 is opposite to the first direction of feed Dl in which the bar B is extracted by the drawing means 33.
  • the chain 19 which is associated to the first side 23 is disposed at a greater height than that of the chain 19 which is associated to the second side 24, so that when they are disposed above the bundles, the rollers 21a, 21b, 21c and 21d are all inclined at an angle of inclination a toward the unloading zone 15 of the device 10, to define a plane ⁇ inclined with respect to the ground: the inclined plane ⁇ has an inclination substantially transverse to the longitudinal development of the bars B.
  • An inclined plane 29 is associated to the terminal part of the bearing structure 17, substantially having the same inclination as the rollers 21a, 21b, 21c and 2 Id.
  • the angle of inclination a of the rollers 21a, 21b, 21c and 21d of the inclined plane 29 is comprised between 10° and 60°.
  • the chain 19, and therefore the rollers 21a, 21b, 21c and 2 Id associated with it, in proximity to the end segments 25 of the bundles F, are constrained to follow an inclined development downward, to be disposed substantially parallel to the end segment 25 which in this condition is curved because of the effect of the actual weight of the bundle F.
  • the sacks 16 which contain the bundles F are disposed at different heights from each other so that, moving from the first side 23 toward the second side 24, they are inclined too by the same angle of inclination a.
  • the lifting unit 12 is associated to the inclined plane 29 by means of a support bracket 32; the lifting unit comprises an articulated arm 30 to the end of which a magnetic element 31 is associated, suitable to lift at least one bar from the bundle F, and the drawing means 33 suitable to move the bar or bars B forward, which are lifted by the articulated arm 30 toward the inclined plane 29, that is, in the first direction D 1.
  • the support bracket 32 extends parallel to the longitudinal extension of the bundles F to allow the articulated arm 30 to pick up the bar B at most at a distance of about a third from its end, with respect to the whole of its length.
  • the magnetic element 31 is disposed in a mainly transverse direction to the longitudinal development of the bars B lying in the respective sack 16, and advantageously has a width such as to cover the whole width of the bundle F.
  • the support bracket 32 is selectively sliding, transversely to the longitudinal disposition of the bundles, along a guide 35 associated to the inclined plane 29, and also disposed inclined by the same angle of inclination a of the latter. In this way it is possible to translate the lifting unit 12 transversely to the longitudinal extension of the bundles F in order to allow the articulated arm 30 to be disposed in correspondence to one of the bundles F.
  • the drawing means 33 comprise two motorized rollers 36 disposed below, and another two contrast rollers 37, above, which are selectively translatable using actuators to take them to grip the bar B and toward the motorized rollers 36.
  • the articulated arm 30 selectively takes the magnetic element 31 into contact with the bars B of one of the bundles F in order to lift an end segment 25 of at least one bar B at least to the same height as the motorized rollers 36 of the drawing means 33.
  • a slight translation is also provided, to allow the raised bar B to be disposed inside the drawing means 33 and on the motorized rollers 36.
  • the contrast rollers 37 are pressed onto the bar B to keep it clamped, and driving them it is possible to make the bar B move forward toward the inclined plane 29.
  • motorized rollers 36 are disposed at least at the same height as the inclined plane ⁇ , in order to allow the bar B, when it has been translated, to be disposed on the inclined plane 29.
  • the bundles F of bars are disposed inside the sacks 16 of the store 1 1, so that respective end segments 25 of the bars B are disposed cantilevered inside the bearing structure 17.
  • the lifting unit 12 is selectively translated along the guide 35 to move into cooperation with one of the bundles F from which the bars B are picked up.
  • the articulated arm 30 is driven to take the magnetic element 31 into contact with the end segment 25 of one of the bars, and then lifted to a height substantially equal to that of the inclined plane ⁇ to dispose the bar B on the motorized rollers 36.
  • the contrast rollers 37 are pressed against the motorized rollers 36 to maintain the bar B clamped between them.
  • rollers 21a, 21b, 21c and 2 Id are made to translate in the second direction D2 to move in succession above the bundles F. Specifically (fig. 4), since the bar B is in a raised position and gripped by the drawing means 33, the roller 21a is moved to an intermediate position between the bundle F from which the bar has been picked up and the end segment 25 of the bar B.
  • the roller 21 exercises a lifting action on the bar B which tends to detach it from the bundle F.
  • the motorized rollers 36 of the drawing means 33 are also driven, which provide to translate the bar B toward the inclined plane 29, that is, in the first direction Dl .
  • the advancing of the bar B allows to reduce the pick-up stresses, thus preventing the bar from becoming deformed. Indeed with this solution sliding friction is reduced to a minimum, which generates considerable deformations in the bar, while rolling friction that causes chafing between one bar and the next, acting longitudinally on the bar, does not cause particular deformations.
  • rollers are moved in succession toward the upper part of the bearing structure 17 and in this way they release the bar from the bundle.
  • roller 21a The main action of extraction is thus carried out by the roller 21a and by the drawing means 33, which move the bar B forward and extract it from the bundle.
  • the other rollers 21b, 21c and 21d substantially have the function of supporting the bar to define the inclined plane ⁇ .
  • rollers 21a, 21b, 21c and 2 Id are again taken below the bundles F, making them repeat the travel inverse to the one described above.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • De-Stacking Of Articles (AREA)
  • Stringed Musical Instruments (AREA)
  • Seal Device For Vehicle (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)

Abstract

La présente invention se rapporte à un dispositif pour saisir au moins une barre (B) depuis un paquet (F) de barres, comprenant au moins une unité de levage (12) appropriée pour lever au moins un segment d'extrémité de la barre (B) par rapport au paquet (F), et une unité d'extraction (13) appropriée pour extraire la barre (B) du paquet (F). L'unité de levage (12) comprend au moins un moyen de préhension et de retenue (30, 31) approprié pour retenir le segment d'extrémité (25) de la barre (B) levée au moins de façon provisoire, et l'unité d'extraction (13) comprend une pluralité d'éléments d'extraction (21a, 21b, 21c, 21d) appropriés pour être déplacés, dans au moins un état de fonctionnement de ceux-ci, entre le paquet (F) et le segment d'extrémité levé (25) de la barre (B) à saisir, puis à être progressivement éloignés à la fois du segment d'extrémité levé (25) et de l'unité de levage (12) dans une direction (D2) sensiblement parallèle à l'extension longitudinale du paquet (F) et vers une extrémité de la barre (B) à l'opposé du segment d'extrémité levé (25).
PCT/IB2012/000421 2011-03-08 2012-03-07 Dispositif de saisie d'au moins une barre métallique depuis un paquet de barres et procédé de saisie correspondant WO2012120361A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000031A ITUD20110031A1 (it) 2011-03-08 2011-03-08 Dispositivo per il prelievo di almeno una barra metallica da un fascio di barre e relativo procedimento di prelievo
ITUD2011A000031 2011-03-08

Publications (1)

Publication Number Publication Date
WO2012120361A1 true WO2012120361A1 (fr) 2012-09-13

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PCT/IB2012/000421 WO2012120361A1 (fr) 2011-03-08 2012-03-07 Dispositif de saisie d'au moins une barre métallique depuis un paquet de barres et procédé de saisie correspondant

Country Status (2)

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IT (1) ITUD20110031A1 (fr)
WO (1) WO2012120361A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018122132A1 (fr) 2016-12-29 2018-07-05 M.E.P. Macchine Elettroniche Piegatrici S.P.A. Appareil et procédé de manutention de barres
TWI788491B (zh) * 2017-12-22 2023-01-01 義大利商Ｍｅｐ義大利美普機械製造有限公司 用於加工棒料的裝置及方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2526769A1 (fr) 1982-05-17 1983-11-18 Mitsui Shipbuilding Eng Dispositif de reprise de barres
DE3921350C1 (fr) 1989-06-29 1990-09-13 Hans Kaltenbach Maschinenfabrik Gmbh & Co, 7850 Loerrach, De
EP0774427A2 (fr) 1995-11-16 1997-05-21 Sten Wallsten Industries Ab Dispositif de séparation
EP1738843A1 (fr) * 2005-06-27 2007-01-03 M.E.P. Macchine Elettroniche Piegatrici S.p.A. Dispositif d'alimentation pour des barres métalliques et méthode correspondante

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2526769A1 (fr) 1982-05-17 1983-11-18 Mitsui Shipbuilding Eng Dispositif de reprise de barres
DE3921350C1 (fr) 1989-06-29 1990-09-13 Hans Kaltenbach Maschinenfabrik Gmbh & Co, 7850 Loerrach, De
EP0774427A2 (fr) 1995-11-16 1997-05-21 Sten Wallsten Industries Ab Dispositif de séparation
EP1738843A1 (fr) * 2005-06-27 2007-01-03 M.E.P. Macchine Elettroniche Piegatrici S.p.A. Dispositif d'alimentation pour des barres métalliques et méthode correspondante

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018122132A1 (fr) 2016-12-29 2018-07-05 M.E.P. Macchine Elettroniche Piegatrici S.P.A. Appareil et procédé de manutention de barres
KR20190103262A (ko) * 2016-12-29 2019-09-04 엠.이.피. 머신 일레트로니쉐 피에가트리치 에스피에이 바를 취급하기 위한 장치 및 방법
CN110392612A (zh) * 2016-12-29 2019-10-29 Mep意大利美普机械制造有限公司 用于处理杆的设备和方法
KR102472049B1 (ko) 2016-12-29 2022-11-29 엠.이.피. 머신 일레트로니쉐 피에가트리치 에스피에이 바를 취급하기 위한 장치 및 방법
TWI788491B (zh) * 2017-12-22 2023-01-01 義大利商Ｍｅｐ義大利美普機械製造有限公司 用於加工棒料的裝置及方法

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