EP0027106B1 - Device for the automatic feeding of rod stock to a bending machine for concrete-reinforcement stirrups - Google Patents

Device for the automatic feeding of rod stock to a bending machine for concrete-reinforcement stirrups Download PDF

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Publication number
EP0027106B1
EP0027106B1 EP19800890111 EP80890111A EP0027106B1 EP 0027106 B1 EP0027106 B1 EP 0027106B1 EP 19800890111 EP19800890111 EP 19800890111 EP 80890111 A EP80890111 A EP 80890111A EP 0027106 B1 EP0027106 B1 EP 0027106B1
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EP
European Patent Office
Prior art keywords
rod
rolls
bending
feed
thrower
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.)
Expired
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EP19800890111
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German (de)
French (fr)
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EP0027106A1 (en
Inventor
Klaus Dipl.-Ing. Ritter
Hans Dipl.-Ing. Gött
Gerhard Dipl.-Ing. Dr. Ritter
Josef Dipl.-Ing. Dr. Ritter
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EVG Entwicklungs und Verwertungs GmbH
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EVG Entwicklungs und Verwertungs GmbH
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    • 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
    • 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
    • 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 invention relates to a device according to the preamble of claim 1 for automatically feeding rod material to a bending machine for concrete reinforcement stirrups.
  • the cut-to-length rod pieces are normally fed to a processing device by means of a gripper, but are thrown off at the beginning and at the end of each rod to remove the uneven end sections of the rod material from the gripper, which temporarily acts as a rod ejector, perpendicular to the rod axis.
  • stirrups are to be made from rod material that is available in standard lengths - usually 12 to 14 m - the accumulation of remnants is unavoidable, because the standard length of a rod generally does not correspond to the sum of the unwound lengths of the stirrups made one after the other from the rod .
  • the bending machine In order to work efficiently and to be able to produce the stirrups economically, the bending machine must be able to be automatically loaded with the required rods, which are taken from a rod magazine, and must also be equipped with an electronic computer, which measures the lengths of the individual feed steps of the rod material between successive bending stages , the sense of direction and the size of the bending angle and finally also the available bar length must be entered. On the basis of these input data, the computer can then determine when the remaining length of a bar is no longer sufficient to produce another bracket and must therefore be removed from the machine.
  • the feed rollers Due to the design dimensions of the feed rollers, the scissors and the bending device, the feed rollers are always arranged at a distance from the actual bending device. It follows immediately that the bending process must be ended at the latest when the end of the remaining remnant is just being gripped by the feed rollers, or in other words when the minimum length of the remnant is equal to the vertical distance of the pivot axis of the bending tool from that through the axes of the Feed rollers defined level is. If this length of the remaining piece is reached, then a further, controlled feeding of the remaining piece to the bending unit is no longer possible, but the remaining piece can still be removed from the bending machine by reversing the direction of rotation of the feed rollers in the direction opposite to its normal feed direction.
  • the minimum length of the remnants must be greater than the value specified above, by such an amount that it is still possible to accelerate the remnant by rapidly driving the feed rollers so that its rear end due to the remnant at Acceleration given the impulse between the feed rollers and the Bending tool can go through.
  • the invention is concerned with the task of designing a device of the type specified in the introduction which is suitable for the automatic feeding of rod material to a bending machine in such a way that the minimum length of unusable remaining pieces is as short as possible and that further removal of long remaining pieces from the bending machine is possible without this can either get back into the rod magazine or injure people in front of the bending machine.
  • the cut-to-length rod pieces regardless of whether they are rod pieces for further processing, end products or waste, are removed from the rod feed path in a lateral direction behind the scissors
  • the remaining pieces resulting from bow bending machines are removed in the area the feed rollers lying in front of the scissors are ejected laterally, for which the roller gap is enlarged accordingly and the rod guides provided in this area are opened laterally.
  • the remnants ejected laterally in front of the scissors cannot mix with the finished stirrups behind the scissors; they can therefore be easily collected and they can be ejected without considerable effort, so that there is no risk of injury to the operating personnel required at the front end of the machine.
  • the remaining pieces can be kept very short in order to minimize material losses.
  • Embodiments of the invention result from the dependent claims 2 to 4.
  • the rod magazine 2 has a V-shaped bottom surface 3, so that the rods located in the magazine always move towards the center of the magazine by gravity.
  • a single bar can be gripped in the magazine 2 and conveyed to the bar feed device of the bending machine.
  • gripping devices are generally known and therefore do not need to be described in more detail.
  • the gripper 4 pushes the front end of the bar in each case so far into a straight bar guide 5 that it gets into the roller gap between a pair of feed rollers 6 and 7.
  • the rollers 6 and 7 each have a circumferential groove and engage positively over the rod.
  • the roller 6- is a drive roller which can be driven by a motor in the direction of the arrow P3, the roller 7, which can be adjusted by means of a hydraulic or pneumatic working cylinder 8 against the drive roller 6 or against the rod located between it and the drive roller 6 and can be removed from it , is a towed role that can be connected to a pulse generator in a known manner and can thus also serve as a measuring role.
  • the bending tool 11 is preferably designed in accordance with AT-B-314 319 so that the bending mandrel and the movable bending jaw are withdrawn from the rod feed path for changing the direction of the bending process and can be returned to the working position in reversed relative positions with respect to this path, as is the case here has been indicated by the tool position 11 '.
  • the scissors 10 can be operated by a working cylinder 12 in the sense of a cut.
  • Aii & machine parts with the exception of the scissors 10 and the bending tool 11, are, as can be seen in FIG. 2, covered with a cover plate 15 which can be brought into an opening position 15 'for inspection purposes and then closed again by means of a working cylinder 16.
  • the lower sides of the rod guides 5 and 9 are formed by machine-controlled sheet metal strips 17, whereas the remaining three sides of these rod guides are attached to the ends of levers 18, which also serve as rod ejectors and are connected in a rotationally fixed manner to a width 23, by which the cover plate is also connected 15 is pivotally mounted.
  • the shaft 23 can be pivoted about its axis by a working cylinder 20 by means of a lever 19.
  • FIGS. 3 and 4 show a machine which is suitable both for loading with rod material in the form of straight rods of a predetermined length and for loading with rod material of very long length wound into rings.
  • This machine has a second pair of feed rollers 25, 26, in which both rollers can be driven by a motor and the roller 26 can be adjusted against the roller 25 by means of a working cylinder 27 or can be removed from this roller, rod guides 28, 29, the structure and method of operation of which are completely the same like that of the staves 5 and 9, complete this additional drive mechanism.
  • a structural unit 34 is provided, which by means of a working cylinder 35 between two. Limit positions adjustable, can be moved in the illustrated embodiment.
  • a straightening roller set 36 lies in the material feed path.
  • a straight rod guide 37 lies in the material feed path.
  • the rod guide 37 consists of a guide trough which is closed on three sides and open towards the viewer and which is closed on the open side only by the cover plate 15. As a result of this design, the rod resting in the rod guide 37 can emerge unhindered from the rod guides 5, 9, 28, 29 and also out of the guide 37 when the levers 18, which also act as rod ejectors, are actuated.
  • a second straightening roller set 38 is provided according to FIG. 5, which is brought into its working position (in FIGS. 3 and 5 with a working cylinder 39) drawn full lines) or from this working position to its rest position (shown in dashed lines in Figures 4 and 5) can be pivoted.
  • the working cylinders 35, 39 are connected in parallel in a common pressure medium line, as a result of which the machine can be converted in a single changeover step either to the supply of elongated rods which have already been aligned or to the supply of rods which have been removed from rings and which are still to be straightened.
  • roller groups of each of the two straightening roller sets which are arranged in two parallel planes, can moreover be separated from one another by means which are not shown because generally known means, in order to make it easier to insert the rod into the machine or to remove it from the machine.

Description

Die Erfindung betrifft eine Einrichtung nach dem Oberbegriff von Anspruch 1 zum automatischen Zuführen von Stabmaterial zu einer Biegemaschine für Betonbewehrungsbügel.The invention relates to a device according to the preamble of claim 1 for automatically feeding rod material to a bending machine for concrete reinforcement stirrups.

Aus der DE-A1-2549546 ist es bekannt, bei Werkzeugmaschinen, denen axial aufeinander ausgerichtete Stäbe mit ihren Enden aneinanderstoßend als Rohmaterial zugeführt werden und in denen von diesen Stäben Stücke abgelängt und weiterverarbeitet werden, für den Vorschub das Stabmaterial formschlüssig übergreifende Vorschubrollen vorzusehen, deren Rollenspalt beim Durchlauf der Stoßenden zweier aufeinanderfolgender Stäbe zur Erleichterung des Eintrittes des Vorderendes des hinteren Stabes jeweils kurzzeitig vergrößert wird, und zwar unter der Steuerwirkung einer federnd gegen das Stabmaterial gedrückten Abtastrolle, die beim Übergang vom Ende des vorderen Stabes auf den Anfang des hinteren Stabes eine Abtastbewegung ausführt. Die abgelängten Stabstücke werden normalerweise mittels eines Greifers einer Verarbeitungsvorrichtung zugeführt, am Anfang und am Ende jedes Stabes aber zwecks Beseitigung der ungleichmäßigen Endabschnitte des Stabmaterials von dem zeitweilig als Stabauswerfer wirkenden Greifer senkrecht zur Stabachse abgeworfen.From DE-A1-2549546 it is known in machine tools, to which axially aligned rods are fed with their ends abutting against one another as raw material and in which pieces of these rods are cut to length and further processed, to provide the rod material with positive interlocking feed rollers for the feed, their The roller gap when the butt ends of two successive rods pass through is briefly increased in each case to facilitate the entry of the front end of the rear rod, under the control effect of a scanning roller pressed resiliently against the rod material, which acts as a transition from the end of the front rod to the beginning of the rear rod Executes scanning movement. The cut-to-length rod pieces are normally fed to a processing device by means of a gripper, but are thrown off at the beginning and at the end of each rod to remove the uneven end sections of the rod material from the gripper, which temporarily acts as a rod ejector, perpendicular to the rod axis.

Ferner ist aus der US-A-3 916 662 eine kombinierte Richt- und Schneidvorrichtung für Bewehrungsstahl bekannt, bei welcher Stabmaterial mit Hilfe von Vorschubrollen von einem Ring abgezogen und durch hintereinander angeordnete Richtsätze hindurchgeführt wird ; mittels einer von einer Längenmeßeinrichung gesteuerten, zwischen zwei Vorschubrollenpaaren angeordneten rotierenden Schere wird das geradegerichtete Stabmaterial in gewünschte Abschnitte abgelängt und diese Abschnitte werden sodann auf einen von schwenkbaren Armen gebildeten Rechen aufgeschoben, von dem sie nach Erreichen einer gewünschten Stückzahl senkrecht zur Stablängsachse in eine Auffangvorrichtung abgeworfen werden.Furthermore, from US-A-3 916 662 a combined straightening and cutting device for reinforcing steel is known, in which rod material is drawn off from a ring with the aid of feed rollers and passed through straightening sets arranged one behind the other; By means of a rotating shear controlled by a length measuring device and arranged between two pairs of feed rollers, the straightened rod material is cut to desired sections and these sections are then pushed onto a rake formed by pivotable arms, from which they are thrown into a collecting device perpendicular to the longitudinal axis of the bar after a desired number of pieces has been reached will.

Andere Probleme als bei diesen bekannten Werkzeugmaschinen ergeben sich bei Bügelbiegemaschinen. Sollen nämlich Bügel aus Stabmaterial hergestellt werden, das in Standardlängen - zumeist 12 bis 14 m - verfügbar ist, so ist das Anfallen von Reststücken unvermeidlich, weil die Standardlänge eines Stabes im allgemeinen nicht der Summe der abgewickelten Längen der nacheinander aus dem Stab gefertigten Bügel entspricht.Problems other than these known machine tools arise with bow bending machines. If stirrups are to be made from rod material that is available in standard lengths - usually 12 to 14 m - the accumulation of remnants is unavoidable, because the standard length of a rod generally does not correspond to the sum of the unwound lengths of the stirrups made one after the other from the rod .

Um rationell arbeiten und die Bügel wirtschaftlich fertigen zu können, muß die Biegemaschine mit den erforderlichen Stäben, die aus einem Stabmagazin entnommen werden, automatisch beschickt werden können und überdies mit einem elektronischen Rechner ausgestattet sein, dem die Längen der einzelnen Vorschubschritte des Stabmaterials zwischen aufeinanderfolgenden Biegeschritten, der Richtungssinn und die Größe der Biegewinkel und schließlich auch noch die verfügbare Stablänge eingegeben werden müssen. Aufgrund dieser Eingabedaten kann der Rechner dann feststellen, wann die verbleibende Restlänge eines Stabes nicht mehr zur Fertigung eines weiteren Bügels ausreicht und daher aus der Maschine entfernt werden muß.In order to work efficiently and to be able to produce the stirrups economically, the bending machine must be able to be automatically loaded with the required rods, which are taken from a rod magazine, and must also be equipped with an electronic computer, which measures the lengths of the individual feed steps of the rod material between successive bending stages , the sense of direction and the size of the bending angle and finally also the available bar length must be entered. On the basis of these input data, the computer can then determine when the remaining length of a bar is no longer sufficient to produce another bracket and must therefore be removed from the machine.

Zwischen den Vorschubrollen für das Stabmaterial und der eigentlichen Biegeeinrichtung ist bei Bügelbiegemaschinen eine Schere angeordnet, mit deren Hilfe jeder fertig gebogene Bügel vom verbleibenden Stabmaterial abgetrennt werden kann.In the case of bow bending machines, a pair of scissors is arranged between the feed rollers for the bar material and the actual bending device, with the aid of which each finished bow can be separated from the remaining bar material.

Zufolge der konstruktiv notwendigen Abmessungen der Vorschubrollen, der Schere und der Biegeeinrichtung sind die Vorschubrollen stets in einem Abstand von der eigentlichen Biegeeinrichtung angeordnet. Daraus folgt unmittelbar, daß der Biegevorgang spätestens dann beendet werden muß, wenn das Ende der verbleibenden Reststückes gerade noch von den Vorschubrollen erfaßt wird, oder anders ausgedrückt, wenn die Mindestlänge des Reststückes gleich dem senkrechten Abstand der Schwenkachse des Biegewerkzeuges von der durch die Achsen der Vorschubrollen definierten Ebene ist. Ist diese Länge des Reststückes erreicht, dann ist ein weiteres, kontrolliertes Vorschieben des Reststückes zur Biegeeinheit nicht mehr möglich, wohl aber kann das Reststück durch Umkehr der Drehrichtung der Vorschubrollen noch in zu seiner normalen Vorschubrichtung entgegengesetzter Richtung aus der Biegemaschine entfernt werden.Due to the design dimensions of the feed rollers, the scissors and the bending device, the feed rollers are always arranged at a distance from the actual bending device. It follows immediately that the bending process must be ended at the latest when the end of the remaining remnant is just being gripped by the feed rollers, or in other words when the minimum length of the remnant is equal to the vertical distance of the pivot axis of the bending tool from that through the axes of the Feed rollers defined level is. If this length of the remaining piece is reached, then a further, controlled feeding of the remaining piece to the bending unit is no longer possible, but the remaining piece can still be removed from the bending machine by reversing the direction of rotation of the feed rollers in the direction opposite to its normal feed direction.

Nun ist ein derartiges Zurückschieben der Reststücke in Richtung auf das Stabmagazin ungünstig, weil bei langen Reststücken, das sind Stücke, deren Länge größer als der vorhin angegebene Mindestwert, aber kleiner als die um die abgewickelte Länge eines Bügels verminderte Standardlänge eines Stabes ist, die Möglichkeit besteht, daß das Reststück wieder zurück in das Stabmagazin gelangt und von dort neuerlich der Maschine zugeführt wird. Wenn die Biegemaschine jedoch auf die Zufuhr von Stäben mit Standardlänge programmiert ist, würde beim Zuführen eines kürzeren Reststückes der Programmablauf der Biegemaschine empfindlich gestört werden.Such a pushing back of the remaining pieces in the direction of the rod magazine is unfavorable, because with long remaining pieces, that is pieces whose length is greater than the minimum value specified above, but smaller than the standard length of a rod reduced by the unwound length of a bracket, the possibility exists there is that the remainder gets back into the rod magazine and is fed from there again to the machine. However, if the bending machine is programmed to feed bars of standard length, the program sequence of the bending machine would be disturbed considerably when a shorter remnant was fed.

Eine andere Möglichkeit besteht darin, das Reststück in Richtung auf das Biegewerkzeug aus der Biegemaschine zu entfernen. Dazu muß aber die Mindestlänge der Reststücke größer als der vorhin angegebene Wert sein, und zwar um einen solchen Betrag, daß es noch möglich ist, das Reststück durch schnelles Antreiben der Vorschubrollen so stark zu beschleunigen, daß sein rückwärtiges Ende aufgrund des dem Reststück bei der Beschleunigung erteilten Impulses den Weg zwischen den Vorschubrollen und dem Biegewerkzeug durchlaufen kann.Another possibility is to remove the remnant from the bending machine in the direction of the bending tool. To do this, however, the minimum length of the remnants must be greater than the value specified above, by such an amount that it is still possible to accelerate the remnant by rapidly driving the feed rollers so that its rear end due to the remnant at Acceleration given the impulse between the feed rollers and the Bending tool can go through.

Bei dieser Vorgangsweise ist die Menge des anfallenden, nicht mehr verwertbaren Materials erheblich größer als im ersten Falle, und es besteht überdies die Gefahr, daß die mit erheblicher Geschwindigkeit aus der Biegemaschine ausgestoßenen Reststücke sich zufällig vor der Biegemaschine befindende Personen verletzen.With this procedure, the amount of accumulated, no longer usable material is considerably larger than in the first case, and there is also the risk that the remaining pieces expelled from the bending machine at considerable speed injure people accidentally in front of the bending machine.

Die Erfindung befaßt sich mit der Aufgabe, eine zum automatischen Zuführen von Stabmaterial zu einer Biegemaschine geeignete Einrichtung der einleitend angegebenen Gattung so auszubilden, daß die Mindestlänge unverwertbarer Reststücke möglichst gering wird und daß ferner ein Entfernen langer Reststücke aus der Biegemaschine möglich ist, ohne daß diese entweder wieder in das Stabmagazin gelangen oder sich vor der Biegemaschine befindende Personen verletzen können.The invention is concerned with the task of designing a device of the type specified in the introduction which is suitable for the automatic feeding of rod material to a bending machine in such a way that the minimum length of unusable remaining pieces is as short as possible and that further removal of long remaining pieces from the bending machine is possible without this can either get back into the rod magazine or injure people in front of the bending machine.

Diese Aufgabe ist gemäß den Kennzeichnungsmerkmalen von Anspruch 1 gelöst.This object is achieved in accordance with the characterizing features of claim 1.

Während bei den einleitend geschilderten bekannten Werkzeugmaschinen die abgelängten Stabstücke, unabhängig davon, ob es sich um Stabstücke zur Weiterverarbeitung, um Endprodukte oder um Abfall handelt, hinter der Schere in seitlicher Richtung aus der Stabvorschubbahn entfernt werden, werden erfindungsgemäß die bei Bügelbiegemaschinen anfallenden Reststücke im Bereich der vor der Schere liegenden Vorschubrollen seitlich ausgeworfen, wozu der Rollenspalt entsprechend vergrößert und die in diesem Bereich vorgesehenen Stabführungen seitlich geöffnet werden. Die seitlich vor der Schere ausgeworfenen Reststücke können sich nicht mit den hinter der Schere anfallenden fertigen Bügeln vermischen ; sie können daher leicht eingesammelt werden und ihr Auswurf kann ohne wesentlichen Kraftaufwand erfolgen, so daß keine Verletzungsgefahr für das am Vorderende der Maschine erforderliche Bedienungspersonal besteht. Überdies können die Reststücke sehr kurz gehalten werden, um die Materialverluste zu minimieren.While in the known machine tools described in the introduction, the cut-to-length rod pieces, regardless of whether they are rod pieces for further processing, end products or waste, are removed from the rod feed path in a lateral direction behind the scissors, according to the invention, the remaining pieces resulting from bow bending machines are removed in the area the feed rollers lying in front of the scissors are ejected laterally, for which the roller gap is enlarged accordingly and the rod guides provided in this area are opened laterally. The remnants ejected laterally in front of the scissors cannot mix with the finished stirrups behind the scissors; they can therefore be easily collected and they can be ejected without considerable effort, so that there is no risk of injury to the operating personnel required at the front end of the machine. In addition, the remaining pieces can be kept very short in order to minimize material losses.

Ausgestaltungen der Erfindung ergeben sich aus den abhängigen Ansprüchen 2 bis 4.Embodiments of the invention result from the dependent claims 2 to 4.

Die Erfindung wird nun anhand von Ausführungsbeispielen unter Bezugnahme auf die Zeichnungen genauer beschrieben. Es zeigt

  • Figur 1 eine mit einer Einrichtung nach der Erfindung ausgestattete Bügelbiegemaschine in Ansicht, wobei der bevorzugt schräg angeordnete Biegeteil aus Gründen der Einfachheit der Darstellung in die Zeichenebene gedreht dargestellt ist,
  • Figur 2 einen Schnitt nach der Linie 11-11 in Figur 1, der die bevorzugte Schräglage des Biegetisches erkennen läßt,
  • Figur 3 die Ansicht einer Bügelbiegemaschine, die mit einer Einrichtung zum wahlweisen Zuführen von Stabmaterial in Form von abgelängten, geraden Stäben oder von Ringen ausgestattet ist, in der Arbeitsstellung für Materialzufuhr von Ringen, wobei wieder der bevorzugt schräg angeordnete Biegeteil aus Gründen der Einfachheit der Darstellung in die Zwischenebene gedreht dargestellt ist,
  • Figur 4 eine andere Darstellung der Maschine nach Figur3, jedoch in der Arbeitsstellung für das Zuführen von abgelängten, geraden Stäben,
  • Figur 5 einen Schnitt nach der Linie V-V in Figur4, der wieder die bevorzugte Schräglage des Biegetisches erkennen läßt.
The invention will now be described in more detail using exemplary embodiments with reference to the drawings. It shows
  • 1 shows a stirrup bending machine equipped with a device according to the invention, the preferably obliquely arranged bent part being shown rotated into the plane of the drawing for reasons of simplicity of illustration,
  • FIG. 2 shows a section along line 11-11 in FIG. 1, which shows the preferred inclined position of the bending table,
  • Figure 3 is a view of a stirrup bending machine, which is equipped with a device for the optional feeding of rod material in the form of cut, straight rods or rings, in the working position for material feeding of rings, again the preferably obliquely arranged bending part for reasons of simplicity of illustration is shown rotated to the intermediate level,
  • FIG. 4 shows another illustration of the machine according to FIG. 3, but in the working position for feeding cut, straight bars,
  • Figure 5 is a section along the line VV in Figure 4, which again shows the preferred inclined position of the bending table.

In Figur 1 erkennt man gerade, abgelängte Stäbe 1, die in einem Stabmagazin 2 ruhen. Wie insbesondere aus Figur erkennbar ist, hat das Stabmagazin 2 eine V-förmige Bodenfläche 3, so daß sich die im Magazin befindlichen Stäbe stets durch die .Schwerkraft zur Magazinmitte hin bewegen.1 shows straight, cut-to-length rods 1 which rest in a rod magazine 2. As can be seen in particular from the figure, the rod magazine 2 has a V-shaped bottom surface 3, so that the rods located in the magazine always move towards the center of the magazine by gravity.

Mit Hilfe eines in Richtung der Doppelpfeile P1 und P2 verfahrbaren Greifers 4 kann ein einzelner Stab im Magazin 2 erfaßt und zur Stabzuführungseinrichtung der Biegemaschine hin gefördert werden. Derartige Greifvorrichtungen sind allgemein bekannt und brauchen daher nicht näher beschrieben zu werden.With the aid of a gripper 4 which can be moved in the direction of the double arrows P1 and P2, a single bar can be gripped in the magazine 2 and conveyed to the bar feed device of the bending machine. Such gripping devices are generally known and therefore do not need to be described in more detail.

Der Greifer 4 schiebt in der Stellung 4' das vordere Ende des jeweils erfaßten Stabes zunächst so weit in eine gerade Stabführung 5, daß es in den Rollenspalt zwischen einem Paar von Vorschubrollen 6 und 7 gelangt. Die Rollen 6 und 7 haben je eine Umfangsnut und übergreifen den Stab formschlüssig.In position 4 ', the gripper 4 pushes the front end of the bar in each case so far into a straight bar guide 5 that it gets into the roller gap between a pair of feed rollers 6 and 7. The rollers 6 and 7 each have a circumferential groove and engage positively over the rod.

Die Rolle 6- ist eine im Sinne des Pfeiles P3 motorisch antreibbare Treibrolle, die Rolle 7, die mittels eines hydraulischen oder pneumatischen Arbeitszylinders 8 gegen die Treibrolle 6 bzw. gegen den zwischen ihr und der Treibrolle 6 befindlichen Stab anstellbar und von diesem wieder entfernbar ist, ist eine geschleppte Rolle, die in bekannter Weise mit einem Impulsgeber verbunden sein und so gleichzeitig als Meßrolle dienen kann.The roller 6- is a drive roller which can be driven by a motor in the direction of the arrow P3, the roller 7, which can be adjusted by means of a hydraulic or pneumatic working cylinder 8 against the drive roller 6 or against the rod located between it and the drive roller 6 and can be removed from it , is a towed role that can be connected to a pulse generator in a known manner and can thus also serve as a measuring role.

Sobald die Meßrolle 7 mittels des Arbeitszylinders 8 gegen den Stab angestellt und die Treibrolle 6 in Richtung des Pfeiles P3 in Drehung versetzt wird, wird der Stab durch eine weitere Stabfürung 9 und zwischen den beiden Messern einer Schere 10 hindurch in das Biegewerkzeug 11 vorgeschoben. Das Biegewerkzeug 11 ist vorzugsweise gemäß der AT-B-314 319 so ausgebildet, daß der Biegedorn und die bewegliche Biegebacke zum Wechsel des Richtungssinnes des Biegevorganges aus der Stabvorschubbahn zurückgezogen und in vertauschten Relativlagen bezüglich dieser Bahn wieder in die Arbeitsstellung zurückgeführt werden können, wie dies durch die Werkzeugstellung 11' angedeutet worden ist. Die Schere 10 kann von einem Arbeitszylinder 12 im Sinne eines Schnittes betätigt werden.As soon as the measuring roller 7 is set against the rod by means of the working cylinder 8 and the driving roller 6 is set in rotation in the direction of the arrow P3, the rod is advanced through a further rod guide 9 and between the two knives of a pair of scissors 10 into the bending tool 11. The bending tool 11 is preferably designed in accordance with AT-B-314 319 so that the bending mandrel and the movable bending jaw are withdrawn from the rod feed path for changing the direction of the bending process and can be returned to the working position in reversed relative positions with respect to this path, as is the case here has been indicated by the tool position 11 '. The scissors 10 can be operated by a working cylinder 12 in the sense of a cut.

Aii& Maschinenteile, mit Ausnahme der Schere 10 und des Biegewerkzeuges 11, sind, wie Figur 2 erkennen läßt, mit einer Abdeckplatte 15, die mittels eines Arbeitszylinders 16 in eine Inspektionszwecken dienende Öffnungslage 15' gebracht und sodann wieder geschlossen werden kann, abgedeckt.Aii & machine parts, with the exception of the scissors 10 and the bending tool 11, are, as can be seen in FIG. 2, covered with a cover plate 15 which can be brought into an opening position 15 'for inspection purposes and then closed again by means of a working cylinder 16.

Die unteren Seiten der Stabführungen 5 und 9 sind durch maschinenteste Blechstreifen 17 gebildet, wogegen die übrigen drei Seiten dieser Stabführungen an den Enden von Hebeln 18 befestigt sind, die zugleich als Stabauswerfer dienen und drehfest mit einer Weite 23 verbunden sind, um welche auch die Abdeckplatte 15 schwenkbar gelagert ist. Mittels eines Hebels 19 kann die Welle 23 durch einen Arbeitszylinder 20 um ihre Achse verschwenkt werden.The lower sides of the rod guides 5 and 9 are formed by machine-controlled sheet metal strips 17, whereas the remaining three sides of these rod guides are attached to the ends of levers 18, which also serve as rod ejectors and are connected in a rotationally fixed manner to a width 23, by which the cover plate is also connected 15 is pivotally mounted. The shaft 23 can be pivoted about its axis by a working cylinder 20 by means of a lever 19.

Um ein Reststück eines Stabes auswerfen zu können. wird dieses durch die Treibrolle 6 soweit vorgeschoben, bis es zur Gänze in den Stabführungen 5 und 9 ruht. Nun wird mittels des Arbeitszylinders 8 die Meßrolle 7 so weit von der Treibrolle 6 entfernt, daß der Stab durch den vergrÖBerten Rollenspalt seitlich hindurchtreten kann.To be able to eject a remaining piece of a stick. this is advanced by the drive roller 6 until it rests entirely in the rod guides 5 and 9. Now the measuring roller 7 is so far away from the drive roller 6 by means of the working cylinder 8 that the rod can pass laterally through the enlarged roller gap.

Anschließend wird durch Betätigung des Arbeitszylinders 20 mittels des Hebels 19 die Welle 23 verschwenkt und dadurch werden die mit dieser Welle verbundenen Teile der Stabführung in die in Figur 2 strichliert gezeichnete Lage gebracht. Da die Abdeckplatte 15 koexial mit der Wege 23 gelagert ist, nehmen die aus ihrer Ruhelage herausschwenkenden und als Stabauswerfer fungierenden Hebel 18 die Abdeckplatte bei ihrer Bewegung mit und der Stabrest kann aus den nunmehr unten offenen Stabführungen 5 und 9 austreten und längs des schrägstehenden Biegetisches herabgleiten. Gegebenenfalls können noch Fangbleche 24 (Figur 5) vorgesehen sein, in welchen die herabgleitenden Stabreste gesammelt werden.Subsequently, by actuating the working cylinder 20 by means of the lever 19, the shaft 23 is pivoted and the parts of the rod guide connected to this shaft are brought into the position shown in broken lines in FIG. Since the cover plate 15 is mounted coexially with the paths 23, the levers 18 which pivot out of their rest position and act as rod ejectors take the cover plate with them when they move and the rod rest can emerge from the rod guides 5 and 9, which are now open at the bottom, and slide down along the inclined bending table . Optionally, catch plates 24 (FIG. 5) can also be provided, in which the sliding rod remnants are collected.

Die Öffnungsbewegung der Abdeckplatte 15 unter der Wirkung des Arbeitszylinders 20 erfolgt dabei gegen eine begrenzte, durch den Arbeitszylinder 16 ausgeübte Kraft, so daß beim Zurückschwenken der Hebel 18 die Abdeckplatte 15 automatisch durch den Arbeitszylinder 16 wieder geschlossen wird.The opening movement of the cover plate 15 under the action of the working cylinder 20 takes place against a limited force exerted by the working cylinder 16, so that when the lever 18 is pivoted back, the cover plate 15 is automatically closed again by the working cylinder 16.

Die Figuren 3 und 4 zeigen eine Maschine, die sowohl für das Beschicken mit Stabmaterial in Form gerader Stangen vorgegebener Länge, als auch für das Beschicken mit zu Ringen aufge- wickeltem Stabmaterial sehr großer Länge geeignet ist.FIGS. 3 and 4 show a machine which is suitable both for loading with rod material in the form of straight rods of a predetermined length and for loading with rod material of very long length wound into rings.

Diese Maschine weist ein zweites Vorschubrollenpaar 25, 26 auf, bei dem beide Rollen motorisch antreibbar sein können und die Rolle 26 mittels eines Arbeitszylinders 27 gegen die Rolle 25 hin anstellbar oder von dieser Rolle entfernbar ist Stabführungen 28, 29, deren Aufbau und Betätigungsweise völlig gleich wie jene der Staführungen 5 und 9 ist, vervollständigen diesen zusätzlichen Antriebsmechanismus.This machine has a second pair of feed rollers 25, 26, in which both rollers can be driven by a motor and the roller 26 can be adjusted against the roller 25 by means of a working cylinder 27 or can be removed from this roller, rod guides 28, 29, the structure and method of operation of which are completely the same like that of the staves 5 and 9, complete this additional drive mechanism.

Zwischen den in gegenseitigem Abstand im Stabrorschbweg angeordneten Rollenpaaren 6, 7 und 25, 26 ist eine Baueinheit 34 vorgesehen, die mittels eines Arbeitszylinders 35 zwischen zwei. Grenzlagen verstellbar, im dargestellten Aushführungsbeispiel verschiebbar ist.Between the pairs of rollers 6, 7 and 25, 26 arranged at a mutual distance in the Stabrorschbweg, a structural unit 34 is provided, which by means of a working cylinder 35 between two. Limit positions adjustable, can be moved in the illustrated embodiment.

In der in Figur 3 gezeigten, unteren Grenzlage der Baueinheit 34 liegt ein Richtrollensatz 36 im materialvorschubweg. In der in Figur 4 gezeigten oberen Grenzlage der Baueinheit 34 liegt eine gerade Stabführung 37 im Materialvorschubweg.In the lower limit position of the assembly 34 shown in FIG. 3, a straightening roller set 36 lies in the material feed path. In the upper limit position of the assembly 34 shown in FIG. 4, a straight rod guide 37 lies in the material feed path.

Die Stabführung 37 besteht aus einer an drei Seiten geschlossenen, gegen den Betrachter hin offenen Führungsrinne, die auf der offenen Seite lediglich durch die Abdeckplatte 15 geschlossen wird. Zufolge dieser Ausbildung kann der in der Stabführung 37 ruhende Stab bei Betätigung der gleichzeitig als Stabauswerfer wirkenden Hebel 18 ungehindert aus den Stabführungen 5, 9, 28, 29 und auch aus der Führung 37 heraustreten.The rod guide 37 consists of a guide trough which is closed on three sides and open towards the viewer and which is closed on the open side only by the cover plate 15. As a result of this design, the rod resting in the rod guide 37 can emerge unhindered from the rod guides 5, 9, 28, 29 and also out of the guide 37 when the levers 18, which also act as rod ejectors, are actuated.

Um den von einem Ring abgezogenen, langen Stab auch in der auf die Wirkungsebene des Richtrollensatzes 36 senkrechten Ebene richten zu können, ist gemäß Figur 5 ein zweiter Richtrollensatz 38 vorgesehen, der mittels eines Arbeitszylinders 39 in seine Arbeitsstellung (in den Figuren 3 und 5 mit vollen Linien gezeichnet) oder aus dieser Arbeitsstellung heraus in seine Ruhestellung (in den Figuren 4 und 5 strichliert gezeichnet) geschwenkt werden kann.In order to be able to straighten the long rod pulled off from a ring also in the plane perpendicular to the plane of action of the straightening roller set 36, a second straightening roller set 38 is provided according to FIG. 5, which is brought into its working position (in FIGS. 3 and 5 with a working cylinder 39) drawn full lines) or from this working position to its rest position (shown in dashed lines in Figures 4 and 5) can be pivoted.

Die Arbeitszylinder 35, 39 liegen in Parallelschaltung in einer gemeinsamen Druckmittelleitung, wodurch die Maschine in einem einzigen Umstellschritt entweder auf Zufuhr bereits gerichteter, abgelänger Stäbe oder auf Zufuhr von von Ringen abgezogener, vorerst noch zu richtender Stäbe umgestellt werden kann.The working cylinders 35, 39 are connected in parallel in a common pressure medium line, as a result of which the machine can be converted in a single changeover step either to the supply of elongated rods which have already been aligned or to the supply of rods which have been removed from rings and which are still to be straightened.

Die in zwei parallelen Ebenen angeordneten Rollengruppen jedes der beiden Richtrollensätze können überdies noch durch nicht dargestellte, weil allgemein bekannte Mittel voneinander entfernt werden, um das Einführen des Stabes in die Maschine oder sein Entfernen aus der Maschine zu erleichtern.The roller groups of each of the two straightening roller sets, which are arranged in two parallel planes, can moreover be separated from one another by means which are not shown because generally known means, in order to make it easier to insert the rod into the machine or to remove it from the machine.

Claims (4)

1. Apparatus for automatic feeding of rod material (1) to the bending tools (11) of a bending machine for reinforcing concrete stirrups, by using at least one driven pair of coacting feed rolls (6, 7; 25, 26) overlapping the material in a conjugate form, which rolls are guided such that they are shiftable against each another in their plane and can be separated in case of need, and a rod thrower (18) which throws the rod ends perpendicular to the rod axis, characterized in that the feed rolls (6, 7 ; 25, 26) can be moved apart to such an extent that an exit of the rod material from the rolls' gap in a direction perpendicular to the rolls' plane is enabled, in that the rod thrower (18) is disposed in the range of the rolls' gap and in that before and/or behind the pair of feed rolls (6, 7 ; 25, 26) straight rod guides (5, 9 ; 28, 29) are disposed, from which, by means of the rod thrower (18), simultaneously with the enlargement of the roll's gap also a side exit passage can be opened for the rod material.
2. Apparatus according to claim 1, characterized in that the rod thrower is formed by swing out levers (18), the ends of which carry channel- like formed parts of the rod guides (5, 9), which parts are normally closed by machinemounted bottom parts.
3. Apparatus according to claim 2, characterized in that the levers (18) are mounted coaxially with a swing out cover plate (15) for the feed rolls (6, 7 ; 25, 26).
4. Apparatus according to one of the claims 1 to 3, characterized in that between two spaced pairs of reverseable feed rolls (6, 7 ; 25, 26) provided in the rod feed path, a device unit (34) is disposed slideable or tiltable between two positions, the device unit comprising a straightening roll set (36) and a straight rod guide (37) open to a side, wherein in one end position of said device unit (34) the straightening roll set and in the other end position thereof the straight rod guide open to a side is disposed in the material feed path.
EP19800890111 1979-10-02 1980-10-01 Device for the automatic feeding of rod stock to a bending machine for concrete-reinforcement stirrups Expired EP0027106B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT644479A AT365484B (en) 1979-10-02 1979-10-02 DEVICE FOR THE AUTOMATIC FEEDING OF ROD MATERIAL TO A BENDING MACHINE FOR CONCRETE REINFORCEMENT BRACKETS
AT6444/79 1979-10-02

Publications (2)

Publication Number Publication Date
EP0027106A1 EP0027106A1 (en) 1981-04-15
EP0027106B1 true EP0027106B1 (en) 1983-01-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800890111 Expired EP0027106B1 (en) 1979-10-02 1980-10-01 Device for the automatic feeding of rod stock to a bending machine for concrete-reinforcement stirrups

Country Status (3)

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EP (1) EP0027106B1 (en)
AT (1) AT365484B (en)
DE (1) DE3061796D1 (en)

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Publication number Priority date Publication date Assignee Title
CN105436362A (en) * 2015-11-18 2016-03-30 天津市银鹤金属制品有限公司 Stepping type horizontal material moving device

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Publication number Priority date Publication date Assignee Title
FR2525505A1 (en) * 1982-04-21 1983-10-28 Bentzmann Bertrand De DEVICE FOR PRODUCING AND EVACUATING WIRED PIECES, MADE
IT1295107B1 (en) † 1997-04-29 1999-04-30 Piegatrici Macch Elettr BENDING SYSTEM PERFECTED FOR BENDING MACHINES
DK2720814T3 (en) * 2011-06-15 2018-07-23 Enkotec As SYSTEM INCLUDING A LEADING DEVICE
CN105414416B (en) * 2015-12-15 2018-12-04 芜湖文青机械设备设计有限公司 Full-automatic bale tie wire deduction

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DE1243952B (en) * 1957-06-21 1967-07-06 Fritz Zur Heide Device for the production of shaped bent parts
DE1167783B (en) * 1960-08-12 1964-04-16 Baustahlgewebe Gmbh Laengsstabzufuehrungseinrichtung for wire mesh welding machines
DE1752693A1 (en) * 1967-07-05 1971-03-18 Mash Zd Mir Automatic machine with electronic program control for the production of stirrups and reinforcement elements
BE791166A (en) * 1972-04-12 1973-03-01 Evg Entwicklung Verwert Ges WIRE OR METAL TAPE CRUSHER
CA982459A (en) * 1972-11-14 1976-01-27 William T. Arnold Apparatus for straightening and cutting reinforcing bar
BE835207A (en) * 1974-11-08 1976-03-01 IMPROVEMENTS TO FORGING MACHINES OR SIMILAR
AT345065B (en) * 1976-03-25 1978-08-25 Evg Entwicklung Verwert Ges AUTOMATIC CONTROL DEVICE FOR A BENDING MACHINE INTENDED FOR THE MANUFACTURE OF CONCRETE REINFORCEMENT STRUCTURES FROM BAR OR WIRE MATERIAL

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105436362A (en) * 2015-11-18 2016-03-30 天津市银鹤金属制品有限公司 Stepping type horizontal material moving device

Also Published As

Publication number Publication date
DE3061796D1 (en) 1983-03-03
EP0027106A1 (en) 1981-04-15
AT365484B (en) 1982-01-25
ATA644479A (en) 1981-06-15

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