EP3031543B1 - Vorrichtung zum laden und entladen von stangen - Google Patents

Vorrichtung zum laden und entladen von stangen Download PDF

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Publication number
EP3031543B1
EP3031543B1 EP15199655.0A EP15199655A EP3031543B1 EP 3031543 B1 EP3031543 B1 EP 3031543B1 EP 15199655 A EP15199655 A EP 15199655A EP 3031543 B1 EP3031543 B1 EP 3031543B1
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EP
European Patent Office
Prior art keywords
bars
arm
bending
unloading
unit
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.)
Not-in-force
Application number
EP15199655.0A
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English (en)
French (fr)
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EP3031543A1 (de
Inventor
Simone Rupoli
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.)
Schnell SpA
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Schnell SpA
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Application filed by Schnell SpA filed Critical Schnell SpA
Publication of EP3031543A1 publication Critical patent/EP3031543A1/de
Application granted granted Critical
Publication of EP3031543B1 publication Critical patent/EP3031543B1/de
Not-in-force legal-status Critical Current
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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
    • 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
    • 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

Definitions

  • the present invention concerns a device according to the preamble of claim 1 for loading and unloading bars combined with an apparatus for bending said bars as well as a method according to the preamble of claim 7.
  • a device and such a method are, for example, disclosed in US-A-4889467 .
  • Such apparatuses usually comprise at least one bend unit, carrying a bending head having suitable bending tools, in particular a central mandrel, an eccentric bending pin and an abutment which prevents the rod being worked to move.
  • the bars to be bent are fed to the bending apparatus by a cutting machine which performs the cutting of the same bars at a pre-established measure.
  • the cut bars to be bent are transported on a roller conveyor placed close to the bending station or however carried, by different means, close to said bending station; the bars, cut to measure, are then fed by hand or automatically to a manufacturing zone.
  • a specific problem that arises in the considered field is the need of loading the bars to be bent between tools of the bending head and subsequently to unload the bent bars inside a suitable compartment of a collecting stock, generally placed at the side of the bend unit.
  • this operation is complex and expensive, as it requires the availability of a suitable zone in which different operators must classify the different groups of bars, all relatively similar, for example by reading the previously applied tags for grouping the straight bars and the bent bars belonging to the same element; the operators must then use suitable raising means, involving also considerable risks from the safety point of view.
  • the task of the present invention is to solve the cited problems, by providing a device which allows to perform, in an optimal way, the loading and the unloading of bar-shaped profiles, such as iron rods for reinforced concrete, in particular allowing to work both on straight and bent bars.
  • a further scope of the invention is to provide a device which allows to increase the productiveness of the plant.
  • a further scope of the invention is to provide a loading and unloading device of the bars of simple assembly, of versatile and reliable use, as well as relatively economic cost.
  • the device for loading and unloading bars combined with an apparatus for bending said bars comprises at least one auxiliary unloading arm mobile on a vertical plane between a lowered disengagement position, arranged below a zone of insertion of the bars between the folding tools of said apparatus for folding bars, and a raised operative position in which the upper surface of said auxiliary unloading arm is inclined so as to define a sliding plane for said bars to a collecting stock, bypassing the bending step.
  • said auxiliary unloading arm is associated with a tilting arm pivoted laterally to a bend unit of said apparatus and mobile between a lowered position, underlying said bend unit, and a raised inclined position for unloading said bars, said tilting arm comprising a load portion separated from an unload portion by means of a shoulder.
  • said auxiliary unloading arm is mobile with respect to said tilting arm between a disengagement position and an operative position in which the upper surface of said auxiliary unloading arm is substantially aligned with the upper surface of said unload portion of the tilting arm so as to define said sliding plane of the bars into said collecting stock.
  • the feeding method for the bars provides to operate at least one auxiliary unloading arm between a lowered disengagement position, arranged below an insertion zone of the bars between the bending tools of said apparatus for bending bars, and a raised operative position in which the upper surface of said auxiliary unloading arm is inclined so as to define a sliding plane of said bars into a collecting zone, bypassing the bending step.
  • the apparatus 1 is provided with at least one bend unit 3 served by a feed line or by a feed bench 4 of the bars 2 cut to measure, preferably constituted by a suitably motorized roller conveyor.
  • the bend unit 3 is fixed or mounted on rails 5 arranged side by side to the roller conveyor 4, as it is shown in the drawings, so as to be displaced as necessary in a different position with respect to the same roller conveyor.
  • the bend unit 3 is constituted, in substantially known manner, by a bending head 6 comprising suitable bending tools, for example a central mandrel or a template and a bending pin, mounted in rotatable manner about the axis of the central mandrel, to perform the bending of a portion of the bar 2 interposed between the central mandrel and the eccentric pin 8.
  • the bending of the bar 2 is performed by virtue of the angular rotation of the eccentric pin about the axis of the central mandrel.
  • the roller conveyor 4 defines a roller plane on which the bars 2 are arranged with axis orthogonal to the axis of the same rolls. More precisely, the bars 2 are longitudinally translated in direction of a stop position delimited for example by a fixed abutment 9, substantially at the bending station.
  • a channel 10 is shaped for picking up the bars 2 to be simultaneously fed to the bending head 6; the channel 10 for pick up of the bars is substantially parallel and coplanar to the roller conveyor 4.
  • Such pick up channel 10 of the bars is made up for example of a plurality of idle rolls 11, embossed at a side of the roller conveyor 4 through supports 12 that shape as well the external bank of the pick up channel 10.
  • the pick up channel 10 is substantially arranged in intermediate position between the roller conveyor 4 and the bend unit 3 of the apparatus; more precisely, the pick up channel 10 is interposed between the roller conveyor 4 and the zone 13 of insertion of the bars between the bending tools of the bend unit 3.
  • a device 20 is associated with the bending apparatus 1 and is predisposed to perform the loading of the bars 2 to be bent inside the above mentioned zone 13 of insertion between the bending tools of the bend unit 3 and the unloading of the bent bars in a suitable compartment of an exit stock 14.
  • the device 20 comprises at least one load and unload unit comprising a ramp 21 preferably fixed, for loading the bars 2 to be bent in the zone 13 of insertion between the bending tools of the bend unit 3 and an arm 22 tilting on a vertical plane transverse to the roller conveyor 4 for unloading the bent bars 2.
  • the device 20 comprises a first load and unload unit 20a associated with the framework of the bend unit 3, upstream of the bending head 6 according to the feed direction of the bars 2, and a second load and unload unit 20b carried by a crossbar 23 fixed in embossed manner, in a suitably adjustable position, to the framework of the roller conveyor 4.
  • the cited load and unload units 20a, 20b are shaped in similar manner and are predisposed to be operated in synchronous manner, as it is specified in the following. Obviously, according to the exigencies, it is possible to provide that the device 20 has a different number of load and unload units.
  • the tilting arm 22 comprises a load portion 25 that extends beyond unload portion 26. More precisely, the load portion 25 is separated from the load portion 26 by means of a shoulder 27 predisposed to prevent the rolling towards the unload portion 26 of the bars 2 in support on the load portion 25.
  • the tilting arm 22 is pivoted to the fixed structure at an axis 28.
  • a motor member or an actuator of known type operates the alternated operation in rotation of the tilting arm 22 from a lower position substantially horizontal to a raised inclined position.
  • the load portion 25 is in a zone below the pick up channel 10.
  • the load portion 25 is predisposed to raise itself with respect to the plane of the channel 10 of pick up until the cited raised portion, raising the bars 2 above the slide 21 preferably fixed.
  • the bars reach by gravity the shoulder 27.
  • the above mentioned load position 25 is predisposed to arrange in a way substantially parallel to the inclined surface 24 of the ramp 21 preferably fixed.
  • the bars 2 which have been bent in the preceding working cycle are unloaded and, as it was previously said, the bars 2 which shall be bent in the subsequent working cycle are raised, by the same movement.
  • the subsequent lowering of the tilting arm 22 is predisposed to bring the bars 2 in contact with the inclined surface 24 of the ramp 21 preferably fixed, on which the bars 2 slide until falling in the zone 13 of insertion between the bending tools.
  • An auxiliary unloading arm 30 is associated with the tilting arm 22 in mobile manner between a disengagement position and an operative position in which it is possible to perform the direct unloading of the bars into the collecting stock 14, thus bypassing the bending step.
  • the tilting arm 22 has box-like shape, for example by means of a double plate or a U-profile, and has an upper opening 29 at the load portion 25.
  • the auxiliary unloading arm 30 is housed inside the tilting arm 22 and is mobile, upon command of suitable actuating means, between a disengagement position retracted inside the same tilting arm 22 and an extracted working position in which the auxiliary unloading arm 30 is protruding through the above mentioned upper opening 29 so as to fill the shoulder 27 of the tilting arm 22.
  • the upper surface of the auxiliary unloading arm 30 is aligned with the upper surface of the unload portion 26 of the tilting arm 22 so as to define a single sliding plane of the bars 2 into the collecting stock 14, bypassing the bending step.
  • auxiliary unloading arm 30 is differently shaped, while performing the same function.
  • the auxiliary unloading arm 30 is carried in rotatable manner, upon command of suitable actuator means, on a vertical plane placed side by side with the rotation plane of the tilting arm 22.
  • the auxiliary unloading arm 30 can be pivoted on the fixed structure which supports the tilting arm 22, in particular on the same pivot 28, or on the same tilting arm 22.
  • the cited actuating means operate the angular alternated rotation of the auxiliary unloading arm 30 between a disengagement lowered position and a raised operative position in which the upper surface of the auxiliary unloading arm 30 is aligned with the upper surface of the unload portion 26 of the tilting arm 22.
  • the bars 2 to be bent in each working cycle are selected by hand and transversely from the roller conveyor 4 to the pick up channel 10, at which the tilting arm 22 works.
  • the tilting arm 22, by means of the load portion 25, brings the same bars 2 to the bending head 6 of the bend unit 3 ( Fig. 2 ).
  • the tilting arm 22 of the loading and unloading device 20 is arranged in the lowered position, with the load portion 25 underlying the height of the rolls of the pick up channel 10 on which are placed in stocking the bars 2 to be bent during the working cycle.
  • the tilting arm 22 raises above the pick up channel 10 so as to reach upwards the bars 2 stocked therein and to pick them up ( Fig. 3 ).
  • the raised bars 2 slide on the load portion 25 reaching in abutment the shoulder 27.
  • the load portion 25 is spaced in substantially parallel manner from the preferably fixed slide 21.
  • the tilting arm 22 is operated in rotation in opposite direction, that is, towards its lowered position that is back towards the lowered position ( Fig. 4 ).
  • the bars 2, arranged on the load portion 25 against the shoulder 27, reach the preferably fixed slide 21 and arrive in support on it while the tilting arm 22 continues its downward stroke.
  • the bars 2 in support on the inclined surface 24 of the preferably fixed slide 21 slide in the zone 13 of insertion between the bending tools, to start, in known manner, the bending cycle ( Fig. 5 ).
  • the bent bars 2 are again taken over by the loading and unloading device 20. More precisely, the tilting arm 22 is again raised from the lowered inactive configuration to the raised configuration. Further to such raising the bent bars 2 are picked up at the zone 13 of insertion between the bending tools and taken over by the tilting arm 22 at the inclined unload portion 26. Once picked up, the bent bars 2 slide along an unload portion 26 for reaching a predetermined compartment of the collecting stock 14 ( Fig. 6 ).
  • the collecting stock 14 can be divided in more than one compartment, possibly selectable for different supplies.
  • the loading and unloading device 20 as it is illustrated, is provided with a plurality of loading and unloading units 20a, 20b, suitably spaced, the described functioning is carried out in synchronism by both the above mentioned units.
  • the auxiliary unloading arm 30 is operated.
  • the auxiliary unloading arm 30 is displaced from the disengagement position to the operative position in which the upper surface of the same auxiliary unloading arm 30 is aligned with the upper surface of the unload portion 26 of the tilting arm 22 so as to define a single sliding plane of the bars 2 into the collecting stock 14, as it can be seen in Fig. 7 in which it is shown the unloading of a bundle of bars. Therefore, the rotation of the tilting arm 22 in the inclined raised position makes the bars 2, picked up from the pick up channel 10, directly slide into the collecting stock 14 ( Fig. 8 ).
  • the device according to the invention reaches therefore the scope of allowing to perform in an optimal manner the loading and the unloading of bar-shaped profiles, in particular iron rods for reinforced concrete, in an apparatus for bending such bars.
  • the device according to the invention allows the straight bars to directly slide into the collecting stock, bypassing the bending step. It is to be observed that these straight bars can be tied in bundles and tagged before the transferring into the collecting warehouse.
  • the device according to the invention allows to group into the collecting stock both the straight bars and the shaped bars destined to the same structural element; in this way the bars remain grouped and therefore easy to tie, for example by an iron wire, and to tag as they are unloaded into the collecting warehouse.
  • the embodiment of the invention may vary depending on the requirements.

Landscapes

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

Claims (9)

  1. Vorrichtung für das Laden und Abladen von Barren in Kombination mit einer Biegevorrichtung der genannten Barren, die mindestens eine Biegegruppe (3) umfasst; eine Zuführgruppe (4) der genannten Barren (2), die an der Seite der genannten Biegegruppe (3) angeordnet ist und dazu geeignet ist, die genannten Barren (2) in einer Längsrichtung zuzuführen; ein Sammellager (14) der Barren, wobei die genannte Vorrichtung umfasst:
    - eine Rutsche (21) für die Zufuhr der genannten Barren (2) zur genannten Biegegruppe (3);
    - ein auf drehbare Weise seitlich mit genannter Biegegruppe (3) verzapfter Schwenkarm (22), der zwischen einer abgesenkten Position unter der genannten Biegegruppe (3) und einer für das Abladen der genannten Barren (2) geneigten angehobenen Position beweglich ist, wobei der genannte Schwenkarm (22) einen Ladeabschnitt (25) umfasst, der von einem Abladeabschnitt (26) mittels einer Schulter (27) getrennt ist, und dadurch gekennzeichnet, dass die genannte Vorrichtung außerdem umfasst:
    - einen Hilfsabladearm (30) verbunden mit dem genannten Schwenkarm (22) und beweglich im Verhältnis zu diesem zwischen einer Freigabe- und einer Betriebsposition, in der eine obere Fläche des genannten Hilfsabladearms (30) im Wesentlichen mit der oberen Fläche des genannten Abladeabschnitts (26) des Schwenkarms (22) ausgerichtet ist, so dass eine Gleitfläche der genannten Barren (2) im genannten Sammellager (14) unter Umgehung der Biegephase festgelegt wird.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der genannte Schwenkarm (22) dazu geeignet ist, mittels des genannten Ladeabschnitts (25) einen oder mehrere zu biegende Barren (2), die in einem Entnahmenkanal (10) der genannten Zuführgruppe (4) vorbereitet sind, abzufangen und diesen einen oder mehrere zu biegende Barren (2) in eine angehobene Position zu bringen, geneigt über der genannten Rutsche (21), auf der ein oder mehrere zu biegende Barren (2) an den Anschlag der genannten Schulter (27) rutschen.
  3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der genannte Hilfsabladearm (30) zwischen einer Freigabeposition beweglich ist, die im Wesentlichen in Übereinstimmung mit dem genannten Abladeabschnitt (26) des Schwenkarms (22) eingezogen ist, und einer genannten Betriebsposition, die im Verhältnis zum genannten Ladeabschnitt (25) des Schwenkarms (22) ausgezogen ist, um die genannte Schulter (27) auszufüllen.
  4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass der genannte Schwenkarm (22) kastenförmig ausgeführt ist und der genannte Hilfsabladearm (30) gleitend innerhalb desselben Schwenkarms (22) untergebracht ist, so dass er in der genannten ausgezogenen Betriebsposition mittels einer oberen Öffnung (29), die an dem genannten Ladeabschnitts (25) ausgeführt wurde, herausragt.
  5. Vorrichtung nach einer der vorausgehenden Ansprüche, dadurch gekennzeichnet, dass die genannte Rutsche (21) auf einer vertikalen Fläche quer zur genannten Zuführgruppe (4) angeordnet ist, um die genannten zu biegenden Barren (2) zu einem Einfügungsbereich (13) der Barren (2) zwischen den Biegewerkzeugen der genannten Biegegruppe (3) zu übertragen.
  6. Vorrichtung nach einer der vorausgehenden Ansprüche, dadurch gekennzeichnet, dass sie mindestens eine erste Lade- und Abladegruppe (20a) umfasst, die unmittelbar hinter der genannten Biegegruppe (3) angeordnet ist, und eine zweite Lade- und Abladegruppe (20b), überhängend im Verhältnis zur genannten Zuführgruppe (4), in Abstandsposition von der genannten ersten Lade- und Abladegruppe (20a), wobei die genannten Lade- und Abladegruppen (20a, 20b) jeweilig mit einer genannten Rutsche (21), einem genannten Schwenkarm (22) und einem genannten Hilfsabladearm (30) ausgerüstet sind und dazu geeignet sind, synchron betätigt zu werden.
  7. Verfahren für die Zuführung von Barren zu einer Vorrichtung für das Biegen der genannten Barren, die mindestens eine Biegegruppe (3) umfasst, eine Zuführgruppe (4) der genannten Barren (2), die an der Seite der genannten Biegegruppe (3) angeordnet ist und dazu geeignet ist, die genannten Barren (2) in einer Längsrichtung zuzuführen und ein Sammellager (14) der Barren, dadurch gekennzeichnet, dass es vorsieht,
    - mindestens einen Hilfsabladearm (30) zwischen einer abgesenkten Freigabeposition, angeordnet unter einem Einfügungsbereich (13) der Barren (2) zwischen den Biegewerkzeugen der genannten Biegevorrichtung der Barren, und einer angehobenen Betriebsposition zu betätigen, in der die obere Fläche des genannten Hilfsabladearms (30) geneigt ist, so dass sie eine Gleitfläche der genannten Barren (2) im genannten Sammellager (14) unter Umgehung der Biegephase festlegt.
  8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass es die folgenden Phasen vorsieht:
    - Zuführen der genannten Barren (2) zu einem Entnahmekanal (10) der genannten Zuführgruppe (4);
    - Betätigen der Winkelrotation eines Schwenkarms (22), der auf drehbare Weise seitlich mit genannter Biegegruppe (3) verzapft ist, aus einer abgesenkten Position unter dem genannten Entnahmekanal (10) zu einer geneigten angehobenen Position, um die genannten Barren (2) aus dem genannten Entnahmekanal (10) zu entnehmen und dieselben Barren (2) in dem genannten Einfügungsbereich (13) der Barren (2) zwischen den Biegewerkzeugen abzuladen, um die genannte Biegephase durchzuführen;
    - alternativ dazu Betätigen des genannten Hilfsabladearm (30), um die genannten Barren (2) zu entnehmen und unter Umgehung der Biegephase im genannten Sammellager (14) abzuladen.
  9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass es die folgende weitere Phase vorsieht:
    - Betätigen der Winkelrotation eines Schwenkarms (22) aus der genannten angehobenen Position in die genannte abgesenkte Position, um die genannten Barren (2), die aus dem genannten Kanal (10) entnommen wurden, zu einer Rutsche (21) zu übertragen, die dazu geeignet ist, dieselben Barren (2) dem genannten Einfügungsbereich (13) der Barren (2) zwischen den Biegewerkzeugen zuzuführen.
EP15199655.0A 2014-12-12 2015-12-11 Vorrichtung zum laden und entladen von stangen Not-in-force EP3031543B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITBO20140699 2014-12-12

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EP3031543A1 EP3031543A1 (de) 2016-06-15
EP3031543B1 true EP3031543B1 (de) 2017-08-16

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IT202100014078A1 (it) * 2021-05-28 2022-11-28 Schnell Spa Gruppo caricatore per elementi oblunghi, in particolare metallici

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Publication number Priority date Publication date Assignee Title
DE3644482A1 (de) * 1986-12-24 1988-07-07 Ruhl Heinz Vorrichtung zum bearbeiten von stangenmaterial
IT1351915B1 (it) * 2003-11-07 2009-01-15 Oscam Spa Impianto per la piegatura di barre di barre metalliche con il trasferimento automatico delle barre nella posizione per la piegatura
TWM287190U (en) * 2005-09-23 2006-02-11 Yuann Fuu Industry Co Ltd Material feeding structure of steel bar bending machine

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EP3031543A1 (de) 2016-06-15

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