EP0222141A2 - Apparatus for forming on a steel wire strand a bulge projecting outward - Google Patents

Apparatus for forming on a steel wire strand a bulge projecting outward Download PDF

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Publication number
EP0222141A2
EP0222141A2 EP86113719A EP86113719A EP0222141A2 EP 0222141 A2 EP0222141 A2 EP 0222141A2 EP 86113719 A EP86113719 A EP 86113719A EP 86113719 A EP86113719 A EP 86113719A EP 0222141 A2 EP0222141 A2 EP 0222141A2
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EP
European Patent Office
Prior art keywords
clamping
jaws
strand
clamping jaws
clamping device
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.)
Granted
Application number
EP86113719A
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German (de)
French (fr)
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EP0222141A3 (en
EP0222141B1 (en
Inventor
Josef Zoels
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.)
Walter Bau AG
Original Assignee
Dyckerhoff and Widmann AG
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Publication date
Application filed by Dyckerhoff and Widmann AG filed Critical Dyckerhoff and Widmann AG
Priority to AT86113719T priority Critical patent/ATE43876T1/en
Publication of EP0222141A2 publication Critical patent/EP0222141A2/en
Publication of EP0222141A3 publication Critical patent/EP0222141A3/en
Application granted granted Critical
Publication of EP0222141B1 publication Critical patent/EP0222141B1/en
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E04C5/12—Anchoring devices
    • E04C5/125—Anchoring devices the tensile members are profiled to ensure the anchorage, e.g. when provided with screw-thread, bulges, corrugations
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
    • D07B7/16—Auxiliary apparatus
    • D07B7/18—Auxiliary apparatus for spreading or untwisting ropes or cables into constituent parts for treatment or splicing purposes
    • D07B7/187—Auxiliary apparatus for spreading or untwisting ropes or cables into constituent parts for treatment or splicing purposes for forming bulbs in ropes or cables
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/4989—Assembling or joining with spreading of cable strands

Definitions

  • the invention relates to a device for producing a bulge on a strand of steel wire as anchoring in components made of concrete, the strand being axially compressed at its free end over a region of its length and thus the individual wires being axially deformed with spreading, consisting of a A frame is provided at one end with a clamping device with two clamping jaws and at the other end a pressure piece that can be displaced via a cylinder-piston unit that can be acted on from both sides, and in between a compression tube that is displaceably mounted in the longitudinal direction, both the pressure piece and the compression tube having means , which allow the strand to be twisted freely during upsetting.
  • strands made of high-strength steel wires have also been used increasingly as reinforcement elements, above all for prestressed concrete.
  • Such strands consist of a central wire, around which the outer wires are grouped in a symmetrical manner in one, sometimes in two annular layers. The outer wires are twisted, similar to a wire rope.
  • Wedge anchors are relatively complex both in terms of the material and in terms of the time required for installation; This is particularly important when the anchoring in question is to be concreted in firmly, ie when the tendon need not be tensioned at the anchoring point. In addition, it is difficult to achieve sufficient vibration resistance with wedge anchorings without additional measures.
  • clamping device which is intended to hold the strand during the upsetting process. If clamping jaws are used for this, they have to be driven hydraulically, which makes the compression device very complex and heavy overall.
  • the clamping force can be generated more easily by means of wedges. However, if wedges are used to hold the strand, they must be provided with teeth on the inner surfaces in order to generate the required holding force. Here, however, there is a risk that the teeth will cut into the surface of the strand and damage the strand wires.
  • the invention has for its object to provide a device of the type mentioned, which allows the strand to be clamped gently with clamping jaws, the clamping force being generated just as easily as when using wedges, in which the Clamping pressure can be defined in a defined manner, in which no special devices and work steps are required to remove the braid provided with the bulge and which, moreover, is constructed in a space-saving manner and is easy to transport and operate.
  • the frame has two mutually spaced side cheeks which carry the clamping device at one end and at the other end a sliding carriage is movable, which carries the pressure piece on the one hand and on the other hand the cylinder -Piston unit is attached, that the clamping jaws are guided parallel to fixed counter-jaws by means of toggle levers arranged in rows and that a two-armed lever is pivotally mounted on the frame, one end of which is operatively connected to the cylinder-piston unit while its other end is supported against the end faces of the jaws.
  • the slideways required for the displacement of the sliding carriage can be formed on sliding rails.
  • the slide can expediently be moved between the side cheeks and overlaps the slideways.
  • the clamping jaws As a result of the parallel guidance of the clamping jaws on toggle levers arranged in rows, the clamping jaws swivel in evenly so that the strand is held securely in the frictional engagement.
  • the use of toggle levers to generate the clamping force on the strand has the further advantage that the clamping force increases as the toggle levers and the other movable parts of the clamping device become worn. Increasing wear does not lead to a loss, but rather to an increase in the functionality of the device. Since the clamping jaws are closed by means of a double-acting cylinder-piston unit, they open the clamping jaws automatically move back when the piston is returned to the starting position, so that the braid provided with the bulge can be lifted out of the device without further manipulation.
  • the lifting out of the strand provided with the bulge is facilitated if the upsetting tube is as far as possible from the clamping device.
  • the displacement of the compression tube in the longitudinal direction required for this purpose is served in each case by a longitudinal slot provided in the side cheeks, in which a sliding device for the compression tube is guided in the manner of a link. If there is a frictional connection between the sliding device and the sliding carriage, the upsetting tube with the sliding carriage is automatically retracted when the piston moves back with the sliding carriage.
  • the clamping device is expediently provided with an adjustable stop for the clamping jaws.
  • an adjustable stop for the clamping jaws.
  • An opening mechanism for the clamping jaws can also be provided on the clamping device, which supports their return to the open position after the end of an upsetting process.
  • the opening mechanism expediently has a spring element, preferably a compression spring, which presses the respective clamping jaws in the opening direction via a pin.
  • the clamping jaws and the associated fixed counter-jaws of the clamping device have circular-arcuate recesses, against which the toggle levers, which are likewise rounded at the ends, are circular support articulated. In this way, considerably higher forces can be transmitted than if the support would only be provided via axle bolts, which, however, can be provided, but then essentially only for pivoting the clamping jaws back into the starting position and for captively storing the parts of the clamping device in the open state serve.
  • the pressure piece expediently has a bore for receiving the central wire of a strand, the depth of which can be adjusted.
  • An adjusting screw can be provided to adjust the depth.
  • a holder with a handle and foot is used, which is screwed onto the outside of the side cheeks of the frame with a base plate and at the same time reinforces the frame in the region of the longitudinal slot.
  • Fig. 1 shows a device according to the invention in side view.
  • the device is used to produce a bulge on a strand made of steel wire, which - however in finished form - is indicated by dashed lines in FIG. 1.
  • the Device consists of a frame 10 of white parallel side cheeks 11, which are connected at one end by a cross-connecting tube 14 and at the other end by an end plate 15.
  • a bracket 60 is fastened, which consists of a screwed base plate 63, to which a handle 61 and a foot 62 are attached.
  • a clamping device 20 with two clamping jaws 22 is fastened exchangeably by means of continuous bolts 27.
  • This type of attachment enables different materials to be used and, in the event of any damage or soiling, the entire clamping device 20 can be exchanged quickly.
  • an opening mechanism is indicated by dashed lines, which essentially consists of two compression springs 24 which press on two pins 28 ', which are each attached to one of the clamping jaws 22. The exact design and the mode of operation of the clamping device 20 will be explained in more detail below with reference to FIG. 2.
  • slideways 12 are provided along their upper and lower longitudinal edges, on which a sliding carriage 30 arranged between the side walls 11 can be displaced.
  • the slideways 12 can, as shown, be formed on the side cheeks 11 themselves; but they can also be formed on special slide rails, which are then attached to the longitudinal edges of the side cheeks 11.
  • the slideways are overlapped by slide strips 36 which are arranged on the slide carriage 30.
  • the pressure piece 31 On the sliding carriage 30 there is a pressure piece 31, by means of which the necessary for the compression of the strand axial pressure can be applied.
  • the pressure piece 31 has a blind hole 34 into which the end of the strand to be compressed which is combined by a sleeve is inserted.
  • the blind hole 34 continues into a central bore 33 with a smaller diameter, into which the central wire of the strand runs during the upsetting process.
  • the depth of the central bore 33 can be adjusted with the help of an adjusting screw 35 with lock nut 37 as required.
  • a double-acting cylinder-piston unit 40 is articulated via an axis 32, the piston rod 41 of which is operatively connected to one end 45 of a two-armed lever 42.
  • the lever 42 is pivotally mounted on the side cheeks 11 via an axis 43. Its end 44 opposite the piston rod 41 is supported against the end faces of the clamping jaws 22 of the clamping device 20.
  • the cross-connection tube 14 also serves as a stop for limiting the pivoting movement of the lever 42, provided that this is not limited by the stroke of the cylinder-piston unit 40.
  • a longitudinal slot 13 is also provided in each of the side cheeks 11 of the frame 10.
  • a sliding device 51 is slidably guided, to which the compression tube 50 is attached.
  • the sliding device 51 and the sliding carriage 30 both of which are displaceable on the side cheeks 11 but also against one another, there is a frictional engagement which ensures that the sliding carriage 30 takes the compression tube 50 with it when it is in again after the production of a bulge on a strand moves back the starting position shown in Fig. 1.
  • the upsetting tube 50 can also be pushed back into the starting position by hand.
  • Each of the two movable clamping jaws 22 is pivotally supported against a fixed counter jaw 26 by a number of toggle levers 21 arranged parallel to one another and in a row next to one another.
  • the clamping jaws 22 and the counter jaws 26 have circular-arcuate recesses 25, against which the likewise circular-arc ends of the toggle levers 21 roll.
  • Axle bolts 28 additionally arranged serve only to ensure the pivoting and opening function in the opened state of the clamping jaws 22.
  • the movement of the jaws 22 is limited by an adjustable stop 23.
  • the clamping force acting transversely to the strand can be metered exactly, so that both slipping of the strand due to insufficient clamping force and damage to the strand due to excessive clamping pressure can be avoided.
  • the toggle levers are covered by cover plates 29 in order to keep contamination and the risk of injury low and to prevent the toggle levers 21 from falling out.
  • the clamping force required to clamp the stranded wire is generated by retracting the piston of the cylinder-piston unit 40 and transmitted directly to the clamping jaws 22 as an axial force via the two-armed lever 42.
  • the lever ratios are chosen so that at the beginning of the work cycle the jaws 22 are first closed against the braid until they abut the stop 23 with their rear end faces. Only then will the until then pulled by the stiffness of the strand in the axial direction slide carriage 30 with the pressure piece 31 against the clamping device 20, whereby the bulging of the strand begins.
  • FIG. 3 shows a view of the end face of the device in the area of the clamping device 20.
  • Two semicircular recesses can be seen in the mutually facing side surfaces of the clamping jaws 22, which receive the strand to be compressed.
  • the cross-connecting tube 14 can be seen, which serves at this end of the device for connecting the side cheeks 11 to the frame 10 and at the same time as a stop for the movement of the lever 42 when the clamping device 20 is opened after the bulge has been completed.
  • the fork-shaped lower end 45 of the lever 42, to which the piston rod 41 is connected in an articulated manner, can also be seen.
  • the piston rod itself, the cylinder-piston unit, the compression tube and the holder are omitted in this illustration in order to increase clarity.
  • Fig. 4 shows a cross section along the line IV-IV in Fig. 1. It can be seen on the bracket 60 attached to the side panels 11 with the base plate 63, the foot 62 and the handle 61. Between the side panels 11 and this above and below with the aid of slide rails 36, there is the slide carriage 30 with the axis 32 for fastening the cylinder-piston unit 40. Furthermore, the compression tube 50 with a rotatable inner tube 52 can be seen. In the direction of view behind the compression tube 50, the pressure piece 31 with the blind hole is located 34 and the central bore 33.
  • a stranded wire is inserted from above into the jaws 22 of the clamping device 20 opened by the springs 24, and this with a sleeve provided end of the strand inserted into the blind bore 34 of the pressure piece 31. Then the piston rod 41 of the cylinder-piston unit 40 is retracted; the upper end 44 of the lever 42 lies against the end faces of the clamping jaws 22 and moves them in the direction of the stop 23.
  • the clamping jaws fix themselves around the Strand and hold it immovably and damage-free.
  • the upsetting pipe 50 is located at its left stop in the illustration in FIG. 1 or in any case in the vicinity thereof.
  • the piston rod 41 is moved out of the cylinder-piston unit 40 again, the sliding carriage 30 being returned to its right-hand starting position. In this position, the finished bulge is indicated in dashed lines in FIG. 1. If there is a frictional connection between the sliding device 51 with the compression tube 50 and the sliding carriage 30, this is also taken along when the sliding carriage 30 is returned; the upsetting tube 50 can also be pushed back by hand.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Wire Processing (AREA)
  • Ropes Or Cables (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Coating With Molten Metal (AREA)
  • Bridges Or Land Bridges (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Vending Machines For Individual Products (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)

Abstract

An apparatus for forming a radially outwardly directed bulge in an axially extending stranded steel wire cable for use as an anchor in a concrete structural component includes a frame with a pair of side walls. A clamping device is mounted on one end of the frame for gripping the stranded cable. The clamping device has two displaceable clamping jaws connected to counter jaws by articulated levers for moving the clamping jaws into the closed or clamped position. The clamping jaws are closed by a piston-cylinder unit mounted in the frame. Spaced from the clamping device on the frame is a sliding carriage with a thrust member into which one end of the stranded cable is inserted. The sliding carriage is connected to the piston-cylinder unit. After the clamping device is closed, the sliding carriage and thrust member are moved toward the clamping device by the piston-cylinder unit and the individual wires of the stranded cable are displaced axially and radially outwardly into a radially extending bulge against the inside surface of an upsetting pipe located between the clamping device and the thrust member.

Description

Die Erfindung betrifft eine Vorrichtung zum Erzeugen einer Ausbauchung an einer Litze aus Stahldraht als Verankerung in Bauteilen aus Beton, wobei die Litze an ihrem freien Ende über einen Bereich ihrer Länge axial gestaucht wird und damit die einzelnen Drähte unter Spreizung axial verformt werden, bestehend aus einem Rahmen, an dessen einem Ende eine Klemmvorrichtung mit zwei Klemmbacken und an dessen anderem Ende ein über eine doppelseitig beaufschlagbare Zylinder-­Kolben-Einheit verschiebbares Druckstück sowie dazwischen ein in Längsrichtung verschieblich gelagertes Stauchrohr vorgesehen sind, wobei sowohl das Druckstück, wie auch das Stauchrohr Mittel aufweisen, die ein freies Verdrehen der Litze beim Stauchen ermöglichen.The invention relates to a device for producing a bulge on a strand of steel wire as anchoring in components made of concrete, the strand being axially compressed at its free end over a region of its length and thus the individual wires being axially deformed with spreading, consisting of a A frame is provided at one end with a clamping device with two clamping jaws and at the other end a pressure piece that can be displaced via a cylinder-piston unit that can be acted on from both sides, and in between a compression tube that is displaceably mounted in the longitudinal direction, both the pressure piece and the compression tube having means , which allow the strand to be twisted freely during upsetting.

Neben Stahlstäben, Stahldrähten und Stahldrahtbündeln werden in der letzten Zeit in zunehmendem Maße auch Litzen aus hochfesten Stahldrähten als Bewehrungselemente vor allem für Spannbeton verwendet. Solche Litzen bestehen aus einem Zentraldraht, um den die äußeren Drähte in einer, manchmal auch in zwei ringförmigen Lagen zentralsymmetrisch gruppiert sind. Die äußeren Drähte sind, ähnlich wie bei einem Drahtseil, verdrillt.In addition to steel bars, steel wires and steel wire bundles, strands made of high-strength steel wires have also been used increasingly as reinforcement elements, above all for prestressed concrete. Such strands consist of a central wire, around which the outer wires are grouped in a symmetrical manner in one, sometimes in two annular layers. The outer wires are twisted, similar to a wire rope.

Litzen als Spannglieder werden in der Regel mittels Keilen verankert. Keilverankerungen sind sowohl hinsichtlich des Materials, wie auch hinsichtlich der für den Einbau benötigten Zeit verhältnismäßig aufwendig; dies fällt vor allem dann ins Gewicht, wenn die betreffende Verankerung fest einbetoniert werden soll, d.h. wenn das Spannglied an der Verankerungsstelle nicht gespannt zu werden braucht. Außerdem ist es schwierig, mit Keilverankerungen ohne zusätzliche Maßnahmen eine ausreichende Schwingungsfestigkeit zu erreichen.Strands as tendons are usually anchored using wedges. Wedge anchors are relatively complex both in terms of the material and in terms of the time required for installation; This is particularly important when the anchoring in question is to be concreted in firmly, ie when the tendon need not be tensioned at the anchoring point. In addition, it is difficult to achieve sufficient vibration resistance with wedge anchorings without additional measures.

Zur festen, also nicht spannbaren Verankerung von Litzen ist es bekannt, die Litze an ihrem freien Ende durch Anwendung axialen Drucks so zu stauchen, daß die einzelnen Drähte unter plastischer Verformung eine Ausbauchung bilden, die zur Verankerung der Litze in ein Betonbauteil eingebettet werden kann. Zur Herstellung einer solchen Ausbauchung ist eine Vorrichtung bekannt, bei der die Ausbauchung zumindest über den Teil ihrer Länge mit dem größten Außendurchmesser innerhalb eines koaxial zur Litzenachse verlaufenden Stauchrohres erfolgt, an dessen Innenwandung sich die Drähte bei der Stauchung anlegen und an der sie sich abwickeln können (DE-OS 32 07 957). Auf diese Weise läßt sich eine gleichmäßige, langsam zunehmende räumliche Krümmung der einzelnen Drähte der Litze mit einer besonders großen Summe der Umlenkwinkel erzielen, die eine Verankerung mit kurzer Entwicklungslänge und sehr gutem Dauerschwingverhalten ermöglicht.For the firm, i.e. non-tensionable anchoring of strands, it is known to compress the strand at its free end by applying axial pressure so that the individual wires form a bulge under plastic deformation, which can be embedded in a concrete component for anchoring the strand. For the production of such a bulge, a device is known in which the bulge takes place at least over the part of its length with the largest outer diameter within a compression tube running coaxially to the strand axis, on the inner wall of which the wires bear during the compression and on which they can unwind (DE-OS 32 07 957). In this way, a uniform, slowly increasing spatial curvature of the individual wires of the stranded wire can be achieved with a particularly large sum of the deflection angles, which enables anchoring with a short development length and very good fatigue behavior.

Ein Problem bei derartigen Stauchvorrichtungen ist die Klemmvorrichtung, welche die Litze während des Stauchvorganges halten soll. Werden hierfür Klemmbacken verwendet, so müssen diese hydraulisch angetrieben werden, was die Stauchvorrichtung insgesamt sehr aufwendig und schwer macht. Auf einfachere Weise läßt sich die Klemmkraft durch Keile erzeugen. Werden aber zum Halten der Litze Keile verwendet, so müssen diese an den Innenflächen mit Zähnen versehen sein, um die erforderliche Haltekraft zu erzeugen. Hierbei besteht aber die Gefahr, daß die Zähne in die Oberfläche der Litze einschneiden und die Litzendrähte beschädigen.A problem with such upsetting devices is the clamping device, which is intended to hold the strand during the upsetting process. If clamping jaws are used for this, they have to be driven hydraulically, which makes the compression device very complex and heavy overall. The clamping force can be generated more easily by means of wedges. However, if wedges are used to hold the strand, they must be provided with teeth on the inner surfaces in order to generate the required holding force. Here, however, there is a risk that the teeth will cut into the surface of the strand and damage the strand wires.

Demgemäß liegt der Erfindung die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art anzugeben, die es erlaubt, das Festklemmen der Litze schonend mit Klemmbacken durchzuführen, wobei die Klemmkraft ebenso einfach erzeugt wird wie bei der Verwendung von Keilen, bei welcher der Klemmdruck definiert einstellbar ist, bei der zum Herausnehmen der mit der Ausbauchung versehenen Litze keine besonderen Vorrichtungen und Arbeitsgänge erforderlich sind und die überdies raumsparend aufgebaut und einfach zu transportieren und zu bedienen ist.Accordingly, the invention has for its object to provide a device of the type mentioned, which allows the strand to be clamped gently with clamping jaws, the clamping force being generated just as easily as when using wedges, in which the Clamping pressure can be defined in a defined manner, in which no special devices and work steps are required to remove the braid provided with the bulge and which, moreover, is constructed in a space-saving manner and is easy to transport and operate.

Nach der Erfindung wird diese Aufgabe dadurch gelöst, daß der Rahmen zwei im gegenseitigen Abstand voneinander gehaltene Seitenwangen aufweist, die an ihrem einen Ende die Klemmvorrichtung tragen und an deren anderem Ende ein Gleitschlitten verschiebbar ist, der einerseits das Druckstück trägt und an dem andererseits die Zylinder-Kolben-­Einheit befestigt ist, daß die Klemmbacken mit Hilfe von in Reihen angeordneten Kniehebeln parallel zu festen Gegenbacken geführt sind und daß an dem Rahmen ein zweiarmiger Hebel schwenkbar gelagert ist, dessen eines Ende mit der Zylinder-Kolben-Einheit in Wirkverbindung steht, während sein anderes Ende sich gegen die Stirnflächen der Klemmbacken abstützt.According to the invention this object is achieved in that the frame has two mutually spaced side cheeks which carry the clamping device at one end and at the other end a sliding carriage is movable, which carries the pressure piece on the one hand and on the other hand the cylinder -Piston unit is attached, that the clamping jaws are guided parallel to fixed counter-jaws by means of toggle levers arranged in rows and that a two-armed lever is pivotally mounted on the frame, one end of which is operatively connected to the cylinder-piston unit while its other end is supported against the end faces of the jaws.

Die für die Verschiebung des Gleitschlittens erforderlichen Gleitbahnen können an Gleitschienen gebildet sein. Zweckmäßig ist der Gleitschlitten zwischen den Seitenwangen verschiebbar und übergreift die Gleitbahnen.The slideways required for the displacement of the sliding carriage can be formed on sliding rails. The slide can expediently be moved between the side cheeks and overlaps the slideways.

Infolge der Parallelführung der Klemmbacken an reihenweise angeordneten Kniehebeln schwenken die Klemmbacken gleichmäßig ein, so daß die Litze im Reibschluß sicher gehalten wird. Die Verwendung von Kniehebeln zum Erzeugen der Klemmkraft auf die Litze hat den weiteren Vorteil, daß sich bei zunehmender Abnützung der Kniehebel sowie der anderen beweglichen Teile der Klemmvorrichtung die Klemmkraft vergrößert. Zunehmende Abnützung führt also nicht zu einem Verlust, sondern zu einer Steigerung der Funktionsfähigkeit der Vorrichtung. Da das Schließen der Klemmbacken mittels einer doppelseitig beaufschlagbaren Zylinder-Kolben-Einheit erfolgt, öffnen sich die Klemmbacken beim Zurückfahren des Kolbens in die Ausgangsstellung selbsttätig wieder, so daß die mit der Ausbauchung versehene Litze ohne weitere Manipulationen aus der Vorrichtung herausgehoben werden kann.As a result of the parallel guidance of the clamping jaws on toggle levers arranged in rows, the clamping jaws swivel in evenly so that the strand is held securely in the frictional engagement. The use of toggle levers to generate the clamping force on the strand has the further advantage that the clamping force increases as the toggle levers and the other movable parts of the clamping device become worn. Increasing wear does not lead to a loss, but rather to an increase in the functionality of the device. Since the clamping jaws are closed by means of a double-acting cylinder-piston unit, they open the clamping jaws automatically move back when the piston is returned to the starting position, so that the braid provided with the bulge can be lifted out of the device without further manipulation.

Das Herausheben der mit der Ausbauchung versehenen Litze wird erleichtert, wenn das Stauchrohr dabei möglichst weit von der Klemmvorrichtung entfernt ist. Der hierzu erforderlichen Verschiebung des Stauchrohres in Längsrichtung dient jeweils ein in den Seitenwangen vorgesehener Längsschlitz, in dem eine Gleitvorrichtung für das Stauchrohr kulissenartig geführt ist. Falls zwischen der Gleitvorrichtung und dem Gleitschlitten ein Reibschluß existiert, wird das Stauchrohr mit dem Gleitschlitten beim Zurückfahren des Kolbens mit dem Gleitschlitten selbsttätig zurückgezogen.The lifting out of the strand provided with the bulge is facilitated if the upsetting tube is as far as possible from the clamping device. The displacement of the compression tube in the longitudinal direction required for this purpose is served in each case by a longitudinal slot provided in the side cheeks, in which a sliding device for the compression tube is guided in the manner of a link. If there is a frictional connection between the sliding device and the sliding carriage, the upsetting tube with the sliding carriage is automatically retracted when the piston moves back with the sliding carriage.

Die Klemmvorrichtung ist zweckmäßig mit einem einstellbaren Anschlag für die Klemmbacken versehen. Durch richtige Einstellung dieses Anschlags in Anpassung an die Länge der Kniehebel kann die Klemmkraft so fein dosiert werden, daß die Litze ohne Gefahr einer Verletzung der Oberflächen ihrer Drähte sicher gehalten wird.The clamping device is expediently provided with an adjustable stop for the clamping jaws. By correctly setting this stop to match the length of the toggle lever, the clamping force can be dosed so finely that the strand is held securely without the risk of damaging the surfaces of its wires.

An der Klemmvorrichtung kann weiterhin ein Öffnungsmechanismus für die Klemmbacken vorgesehen sein, der nach Beendigung eines Stauchvorganges deren Rückführung in die geöffnete Lage unterstützt. Der Öffnungsmechanismus weist zweckmäßig jeweils ein Federelement, vorzugsweise eine Druckfeder auf, die über einen Stift den jeweiligen Klemmbacken in Öffnungsrichtung drückt.An opening mechanism for the clamping jaws can also be provided on the clamping device, which supports their return to the open position after the end of an upsetting process. The opening mechanism expediently has a spring element, preferably a compression spring, which presses the respective clamping jaws in the opening direction via a pin.

Zur sicheren und materialschonenden Kraftübertragung über die Kniehebel weisen die Klemmbacken sowie die diesen zugeordneten festen Gegenbacken der Klemmvorrichtung kreisbogenförmige Ausnehmungen auf, gegen welche sich die an den Enden ebenfalls kreisbogenförmig abgerundeten Kniehebel gelenkartig abstützen. Auf diese Weise lassen sich erheblich höhere Kräfte übertragen, als wenn die Abstützung nur über Achsbolzen erfolgen würde, die allerdings zusätzlich vorgesehen sein können, dann aber im wesentlichen nur zum Rückschwenken der Klemmbacken in die Ausgangsstellung und zur unverlierbaren Lagerung der Teile der Klemmvorrichtung im geöffneten Zustand dienen.For safe and material-saving power transmission via the toggle levers, the clamping jaws and the associated fixed counter-jaws of the clamping device have circular-arcuate recesses, against which the toggle levers, which are likewise rounded at the ends, are circular support articulated. In this way, considerably higher forces can be transmitted than if the support would only be provided via axle bolts, which, however, can be provided, but then essentially only for pivoting the clamping jaws back into the starting position and for captively storing the parts of the clamping device in the open state serve.

Das Druckstück weist zweckmäßig eine Bohrung zur Aufnahme des Zentraldrahtes einer Litze auf, deren Tiefe einstellbar ist. Zur Einstellung der Tiefe kann eine Einstellschraube vorgesehen sein.The pressure piece expediently has a bore for receiving the central wire of a strand, the depth of which can be adjusted. An adjusting screw can be provided to adjust the depth.

Zur leichteren Handhabung der Vorrichtung dient eine Halterung mit Handgriff und Fuß, die mit einer Grundplatte außen auf die Seitenwangen des Rahmens aufgeschraubt ist und dabei gleichzeitig den Rahmen im Bereich des Längsschlitzes verstärkt.For easier handling of the device, a holder with a handle and foot is used, which is screwed onto the outside of the side cheeks of the frame with a base plate and at the same time reinforces the frame in the region of the longitudinal slot.

Die Erfindung wird nachstehend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. Es zeigt

  • Fig. 1 eine Seitenansicht der Vorrichtung,
  • Fig. 2 eine Draufsicht auf die Vorrichtung nach Fig. 1,
  • Fig. 3 eine Stirnansicht der Vorrichtung gemäß der Linie III-III in Fig. 1 und
  • Fig. 4 einen Querschnitt durch die Vorrichtung entlang der Linie IV-IV in Fig. 1.
The invention is explained below with reference to an embodiment shown in the drawing. It shows
  • 1 is a side view of the device,
  • 2 is a plan view of the device of FIG. 1,
  • Fig. 3 is an end view of the device along the line III-III in Fig. 1 and
  • 4 shows a cross section through the device along the line IV-IV in FIG. 1.

Fig. 1 zeigt eine Vorrichtung nach der Erfindung in Seitenansicht. Die Vorrichtung dient zum Herstellen einer Ausbauchung an einer Litze aus Stahldraht, die - allerdings in fertiger Form - in Fig. 1 gestrichelt angedeutet ist. Die Vorrichtung besteht aus einem Rahmen 10 aus wei parallelen Seitenwangen 11, die an einem Ende durch ein Querverbindungsrohr 14 und am anderen Ende durch eine Stirnplatte 15 miteinander verbunden sind. An den Außenflächen der Seitenwangen 11 ist eine Halterung 60 befestigt, die aus jeweils einer angeschraubten Grundplatte 63 besteht, an denen ein Handgriff 61 und ein Fuß 62 angebracht sind.Fig. 1 shows a device according to the invention in side view. The device is used to produce a bulge on a strand made of steel wire, which - however in finished form - is indicated by dashed lines in FIG. 1. The Device consists of a frame 10 of white parallel side cheeks 11, which are connected at one end by a cross-connecting tube 14 and at the other end by an end plate 15. On the outer surfaces of the side walls 11, a bracket 60 is fastened, which consists of a screwed base plate 63, to which a handle 61 and a foot 62 are attached.

An dem in der Darstellung der Fig. 1 linken Ende der Seitenwangen 11 ist mittels durchgehender Bolzen 27 eine Klemmvorrichtung 20 mit zwei Klemmbacken 22 auswechselbar befestigt. Diese Art der Befestigung gibt die Möglichkeit, unterschiedliche Materialien zu verwenden und im Falle einer etwaigen Beschädigung oder Verschmutzung die gesamte KlemmVorrichtung 20 rasch austauschen zu können. Im Inneren der Klemmvorrichtung 20 ist gestrichelt ein Öffnungsmechanismus angedeutet, der im wesentlichen aus zwei Druckfedern 24 besteht, die auf zwei Stifte 28′ drücken, die an je einem der Klemmbacken 22 befestigt sind. Die genaue Ausbildung und die Wirkungsweise der Klemmvorrichtung 20 wird weiter unten anhand der Fig. 2 näher erläutert.At the left end of the side cheeks 11 in the illustration in FIG. 1, a clamping device 20 with two clamping jaws 22 is fastened exchangeably by means of continuous bolts 27. This type of attachment enables different materials to be used and, in the event of any damage or soiling, the entire clamping device 20 can be exchanged quickly. Inside the clamping device 20, an opening mechanism is indicated by dashed lines, which essentially consists of two compression springs 24 which press on two pins 28 ', which are each attached to one of the clamping jaws 22. The exact design and the mode of operation of the clamping device 20 will be explained in more detail below with reference to FIG. 2.

An dem gegenüberliegenden Ende der Seitenwangen 11 sind entlang ihrer oberen und unteren Längsränder Gleitbahnen 12 vorgesehen, auf denen ein zwischen den Seitenwangen 11 angeordneter Gleitschlitten 30 verschiebbar ist. Die Gleitbahnen 12 können, wie dargestellt, an den Seitenwangen 11 selbst ausgebildet sein; sie können aber auch an besonderen Gleitschienen ausgebildet sein, die dann an den Längsrändern der Seitenwangen 11 befestigt sind. Die Gleitbahnen werden von Gleitleisten 36 übergriffen, die an dem Gleitschlitten 30 angeordnet sind.At the opposite end of the side walls 11, slideways 12 are provided along their upper and lower longitudinal edges, on which a sliding carriage 30 arranged between the side walls 11 can be displaced. The slideways 12 can, as shown, be formed on the side cheeks 11 themselves; but they can also be formed on special slide rails, which are then attached to the longitudinal edges of the side cheeks 11. The slideways are overlapped by slide strips 36 which are arranged on the slide carriage 30.

Auf dem Gleitschlitten 30 befindet sich ein Druckstück 31, mittels dessen der für die Stauchung der Litze erforderliche axiale Druck ausgeübt werden kann. Das Druckstück 31 besitzt eine Sacklochbohrung 34, in welche das durch eine Hülse zusammengefaßte Ende der zu stauchenden Litze eingesetzt wird. Die Sacklochbohrung 34 setzt sich in eine zentrische Bohrung 33 mit geringerem Durchmesser fort, in die während des Stauchvorgangs der Zentraldraht der Litze hineinläuft. Die Tiefe der zentrischen Bohrung 33 kann mit Hilfe einer Einstellschraube 35 mit Kontermutter 37 je nach Bedarf eingestellt werden.On the sliding carriage 30 there is a pressure piece 31, by means of which the necessary for the compression of the strand axial pressure can be applied. The pressure piece 31 has a blind hole 34 into which the end of the strand to be compressed which is combined by a sleeve is inserted. The blind hole 34 continues into a central bore 33 with a smaller diameter, into which the central wire of the strand runs during the upsetting process. The depth of the central bore 33 can be adjusted with the help of an adjusting screw 35 with lock nut 37 as required.

An der Unterseite des Gleitschlittens 30 ist über eine Achse 32 eine doppelt wirkende Zylinder-Kolben-Einheit 40 angelenkt, deren Kolbenstange 41 mit dem einen Ende 45 eines zweiarmigen Hebels 42 in Wirkverbindung steht. Der Hebel 42 ist über eine Achse 43 an den Seitenwangen 11 schwenkbar gelagert. Sein der Kolbenstange 41 gegenüberliegendes Ende 44 stützt sich gegen die Stirnflächen der Klemmbacken 22 der Klemmvorrichtung 20 ab. Das Querverbindungsrohr 14 dient zugleich als Anschlag zur Begrenzung der Schwenkbewegung des Hebels 42, sofern diese nicht durch den Hub der Zylinder-­Kolben-Einheit 40 begrenzt wird.On the underside of the slide carriage 30, a double-acting cylinder-piston unit 40 is articulated via an axis 32, the piston rod 41 of which is operatively connected to one end 45 of a two-armed lever 42. The lever 42 is pivotally mounted on the side cheeks 11 via an axis 43. Its end 44 opposite the piston rod 41 is supported against the end faces of the clamping jaws 22 of the clamping device 20. The cross-connection tube 14 also serves as a stop for limiting the pivoting movement of the lever 42, provided that this is not limited by the stroke of the cylinder-piston unit 40.

In den Seitenwangen 11 des Rahmens 10 ist ferner jeweils ein Längsschlitz 13 vorgesehen. In diesem Längsschlitz 13 ist kulissenartig eine Gleitvorrichtung 51 verschieblich geführt, an der das Stauchrohr 50 befestigt ist. Zwischen der Gleitvorrichtung 51 und dem Gleitschlitten 30, die beide an den Seitenwangen 11, aber auch aneinander verschiebbar sind, besteht ein Reibschluß, der dafür sorgt, daß der Gleitschlitten 30 das Stauchrohr 50 mitnimmt, wenn er nach Herstellung einer Ausbauchung an einer Litze wieder in die in Fig. 1 dargestellte Ausgangsposition zurückfährt. Das Stauchrohr 50 kann aber auch von Hand wieder in die Ausgangsposition zurückgeschoben werden.A longitudinal slot 13 is also provided in each of the side cheeks 11 of the frame 10. In this longitudinal slot 13 a sliding device 51 is slidably guided, to which the compression tube 50 is attached. Between the sliding device 51 and the sliding carriage 30, both of which are displaceable on the side cheeks 11 but also against one another, there is a frictional engagement which ensures that the sliding carriage 30 takes the compression tube 50 with it when it is in again after the production of a bulge on a strand moves back the starting position shown in Fig. 1. The upsetting tube 50 can also be pushed back into the starting position by hand.

Die Konstruktion und Wirküngsweise der Klemmvorrichtung 20 können anhand der Draufsicht gemäß Fig. 2 erläutert werden. Jeder der beiden beweglichen Klemmbacken 22 ist über eine Anzahl von parallel zueinander und in einer Reihe nebeneinander angeordneten Kniehebeln 21 gegen jeweils einen festen Gegenbacken 26 schwenkbar abgestützt. Die Klemmbacken 22 und die Gegenbacken 26 weisen kreisbogenförmige Ausnehmungen 25 auf, gegen die sich die ebenfalls kreisbogenförmigen Enden der Kniehebel 21 abwälzen. Auf diese Weise lassen sich die Klemmkräfte, die infolge der fast rechtwinkligen Anordnung der Kniehebel 21 zur Bewegungsrichtung der Klemmbacken 22 sehr groß sind, besonders materialschonend abtragen. Zusätzlich angeordnete Achsbolzen 28 dienen lediglich dazu, im geöffneten Zustand der Klemmbacken 22 die Schwenk- und Öffnungsfunktion zu gewährleisten.The construction and mode of operation of the clamping device 20 can be explained using the top view according to FIG. 2. Each of the two movable clamping jaws 22 is pivotally supported against a fixed counter jaw 26 by a number of toggle levers 21 arranged parallel to one another and in a row next to one another. The clamping jaws 22 and the counter jaws 26 have circular-arcuate recesses 25, against which the likewise circular-arc ends of the toggle levers 21 roll. In this way, the clamping forces, which are very large due to the almost right-angled arrangement of the toggle levers 21 in relation to the direction of movement of the clamping jaws 22, can be removed in a particularly gentle manner. Axle bolts 28 additionally arranged serve only to ensure the pivoting and opening function in the opened state of the clamping jaws 22.

Die Bewegung der Klemmbacken 22 wird durch einen einstellbaren Anschlag 23 begrenzt. Dadurch kann die quer zur Litze wirkende Klemmkraft exakt dosiert werden, so daß sowohl ein Durchrutschen der Litze infolge zu geringer Klemmkraft, wie auch eine Beschädigung der Litze infolge zu hohen Klemmdruckes vermieden werden können.The movement of the jaws 22 is limited by an adjustable stop 23. As a result, the clamping force acting transversely to the strand can be metered exactly, so that both slipping of the strand due to insufficient clamping force and damage to the strand due to excessive clamping pressure can be avoided.

Soweit möglich, sind die Kniehebel durch Abdeckbleche 29 abgedeckt, um Verschmutzung und Verletzungsgefahr gering zu halten und ein eventuelles Herausfallen der Kniehebel 21 zu vermeiden.As far as possible, the toggle levers are covered by cover plates 29 in order to keep contamination and the risk of injury low and to prevent the toggle levers 21 from falling out.

Die zum Festklemmen der Litze erforderliche Klemmkraft wird durch Einfahren des Kolbens der Zylinder-Kolben-Einheit 40 erzeugt und über den zweiarmigen Hebel 42 direkt als Axialkraft auf die Klemmbacken 22 übertragen. Die Hebelverhältnisse sind dabei so gewählt, daß zu Beginn des Arbeitstaktes zunächst die Klemmbacken 22 gegen die Litze geschlossen werden, bis sie mit ihren rückwärtigen Stirnflächen gegen den Anschlag 23 stoßen. Erst dann wird der bis dahin durch die Steifigkeit der Litze in axialer Richtung zurückgehaltene Gleitschlitten 30 mit dem Druckstück 31 gegen die Klemmvorrichtung 20 gezogen, wodurch das Ausbauchen der Litze beginnt.The clamping force required to clamp the stranded wire is generated by retracting the piston of the cylinder-piston unit 40 and transmitted directly to the clamping jaws 22 as an axial force via the two-armed lever 42. The lever ratios are chosen so that at the beginning of the work cycle the jaws 22 are first closed against the braid until they abut the stop 23 with their rear end faces. Only then will the until then pulled by the stiffness of the strand in the axial direction slide carriage 30 with the pressure piece 31 against the clamping device 20, whereby the bulging of the strand begins.

Fig. 3 zeigt einen Blick auf die Stirnseite der Vorrichtung im Bereich der Klemmvorrichtung 20. Man erkennt hier zwei halbrunde Ausnehmungen in den einander zugewandten Seitenflächen der Klemmbacken 22, welche die zu stauchende Litze aufnehmen. Ferner ist das Querverbindungsrohr 14 erkennbar, das an diesem Ende der Vorrichtung der Verbindung der Seitenwangen 11 zu dem Rahmen 10 sowie gleichzeitig als Anschlag für die Bewegung des Hebels 42 beim Öffnen der Klemmvorrichtung 20 nach Fertigstellung der Ausbauchung dient. Ferner erkennt man das gabelförmig ausgebildete untere Ende 45 des Hebels 42, an das die Kolbenstange 41 gelenkig angeschlossen ist. Die Kolbenstange selbst, die Zylinder-­Kolben-Einheit, das Stauchrohr und die Halterung sind in dieser Darstellung weggelassen, um die Übersichtlichkeit zu erhöhen.3 shows a view of the end face of the device in the area of the clamping device 20. Two semicircular recesses can be seen in the mutually facing side surfaces of the clamping jaws 22, which receive the strand to be compressed. Furthermore, the cross-connecting tube 14 can be seen, which serves at this end of the device for connecting the side cheeks 11 to the frame 10 and at the same time as a stop for the movement of the lever 42 when the clamping device 20 is opened after the bulge has been completed. The fork-shaped lower end 45 of the lever 42, to which the piston rod 41 is connected in an articulated manner, can also be seen. The piston rod itself, the cylinder-piston unit, the compression tube and the holder are omitted in this illustration in order to increase clarity.

Fig. 4 zeigt einen Querschnitt entlang der Linie IV-IV in Fig. 1. Man erkennt darauf die an den Seitenwangen 11 befestigte Halterung 60 mit der Grundplatte 63, dem Fuß 62 und dem Handgriff 61. Zwischen den Seitenwangen 11 und diese oben und unten mit Hilfe von Gleitschienen 36 übergreifend befindet sich der Gleitschlitten 30 mit der Achse 32 zur Befestigung der Zylinder-Kolben-Einheit 40. Ferner erkennt man das Stauchrohr 50 mit einem drehbaren Innenrohr 52. In Blickrichtung hinter dem Stauchrohr 50 liegt das Druckstück 31 mit der Sacklochbohrung 34 und der zentralen Bohrung 33.Fig. 4 shows a cross section along the line IV-IV in Fig. 1. It can be seen on the bracket 60 attached to the side panels 11 with the base plate 63, the foot 62 and the handle 61. Between the side panels 11 and this above and below with the aid of slide rails 36, there is the slide carriage 30 with the axis 32 for fastening the cylinder-piston unit 40. Furthermore, the compression tube 50 with a rotatable inner tube 52 can be seen. In the direction of view behind the compression tube 50, the pressure piece 31 with the blind hole is located 34 and the central bore 33.

Zur Herstellung einer Ausbauchung an einer Litze wird bei ausgefahrener Kolbenstange 41 eine Litze von oben her in die durch die Federn 24 geöffneten Klemmbacken 22 der Klemmvorrichtung 20 eingelegt und das mit einer Hülse versehene Ende der Litze in die Sackbohrung 34 des Druckstücks 31 eingeführt. Anschließend wird die Kolbenstange 41 der Zylinder-Kolben-Einheit 40 eingefahren; dabei legt sich das obere Ende 44 des Hebels 42 gegen die Stirnflächen der Klemmbacken 22 und verschiebt diese in Richtung auf den Anschlag 23. Infolge der Parallelführung der beweglichen Klemmbacken 22 mittels der gegen die festen Gegenbacken 26 abgestützten Kniehebel 21 legen sich die Klemmbacken fest um die Litze und halten sie unverrückbar und beschädigungsfrei fest. Durch entsprechende Wahl der Länge der Klemmbacken 22 und der Kniehebel 21 sowie Einstellung des Anschlages 23 kann der Klemmdruck auf die Litze trotz hoher Haltewirkung gering gehalten werden. Das Stauchrohr 50 befindet sich dabei an seinem in der Darstellung der Fig. 1 linken Anschlag oder jedenfalls in der Nähe desselben.To produce a bulge on a stranded wire, a stranded wire is inserted from above into the jaws 22 of the clamping device 20 opened by the springs 24, and this with a sleeve provided end of the strand inserted into the blind bore 34 of the pressure piece 31. Then the piston rod 41 of the cylinder-piston unit 40 is retracted; the upper end 44 of the lever 42 lies against the end faces of the clamping jaws 22 and moves them in the direction of the stop 23. As a result of the parallel guidance of the movable clamping jaws 22 by means of the toggle levers 21 supported against the fixed counter-jaws 26, the clamping jaws fix themselves around the Strand and hold it immovably and damage-free. By appropriate selection of the length of the clamping jaws 22 and the toggle lever 21 and adjustment of the stop 23, the clamping pressure on the strand can be kept low despite the high holding effect. The upsetting pipe 50 is located at its left stop in the illustration in FIG. 1 or in any case in the vicinity thereof.

Bei weiterem Einfahren der Kolbenstange 41 wird der Gleitschlitten 30 mit dem Druckstück 31 in Richtung auf die Klemmvorrichtung 20 gezogen. Dabei gerät die Litze unter axialen Stauchdruck, so daß ihre Drähte sich ausbauchen. Die Drähte legen sich dabei von innen gegen das Stauchrohr 50 bzw. das drehbare Innenrohr 52 an und erhalten bei fortgesetzter Stauchung dort die gewünschte bleibende Form der Ausbauchung.When the piston rod 41 is retracted further, the sliding carriage 30 with the pressure piece 31 is pulled in the direction of the clamping device 20. The strand comes under axial compression pressure, so that its wires bulge. The wires lie against the upset tube 50 or the rotatable inner tube 52 from the inside and, as the upset continues, they obtain the desired permanent shape of the bulge there.

Nach dem Herstellen der Ausbauchung wird die Kolbenstange 41 wieder aus der Zylinder-Kolben-Einheit 40 herausgefahren, wobei der Gleitschlitten 30 in seine rechte Ausgangsstellung zurückgeführt wird. In dieser Position ist in Fig. 1 die fertiggestellte Ausbauchung gestrichelt angedeutet. Sofern zwischen der Gleitvorrichtung 51 mit dem Stauchrohr 50 und dem Gleitschlitten 30 ein Reibschluß besteht, wird bei der Rückführung des Gleitschlittens 30 auch diese mitgenommen; das Stauchrohr 50 kann aber auch von Hand zurückgeschoben werden.After the bulge has been produced, the piston rod 41 is moved out of the cylinder-piston unit 40 again, the sliding carriage 30 being returned to its right-hand starting position. In this position, the finished bulge is indicated in dashed lines in FIG. 1. If there is a frictional connection between the sliding device 51 with the compression tube 50 and the sliding carriage 30, this is also taken along when the sliding carriage 30 is returned; the upsetting tube 50 can also be pushed back by hand.

Sofern der Hub der Zylinder-Kolben-Einheit 40 den Weg des zweiarmigen Hebels 42 nicht vorher begrenzt, kommt dieser am Querverbindungsrohr 14 zur Anlage. Dadurch entfällt der Schließdruck auf die Klemmbacken 22, so daß diese sich unter der Wirkung der Federn 24 des Öffnungsmechanismus wieder öffnen können. Die verformte Litze mit der Ausbauchung kann dann auf einfache Weise nach oben aus der Vorrichtung herausgehoben werden.If the stroke of the cylinder-piston unit 40 does not previously limit the path of the two-armed lever 42, this comes to rest on the cross-connection tube 14. This eliminates the closing pressure on the jaws 22 so that they can open again under the action of the springs 24 of the opening mechanism. The deformed strand with the bulge can then easily be lifted up out of the device.

Vor Beginn des nächsten Verformungsvorganges muß lediglich das Stauchrohr 50 von Hand an seinen der Klemmvorrichtung 20 benachbarten Anschlag zurückgebracht werden. Alle anderen Vorgänge laufen wie geschildert selbsttätig und nur von der Zylinder-Kolben-Einheit 40 gesteuert ab.Before the next deformation process begins, only the upsetting tube 50 has to be brought back by hand to its stop adjacent to the clamping device 20. All other processes run automatically as described and only controlled by the cylinder-piston unit 40.

Claims (14)

1. Vorrichtung zum Erzeugen einer Ausbauchung am Ende einer Litze aus Stahldraht als Verankerung in Bauteilen aus Beton, wobei die Litze an ihrem freien Ende über einen Bereich ihrer Länge axial gestaucht wird und damit die einzelnen Drähte unter Spreizung axial verformt werden, bestehend aus einem Rahmen, an dessen einem Ende eine Klemmvorrichtung mit zwei Klemmbacken und an dessen anderem Ende ein über eine doppelseitig beaufschlagbare Zylinder-­Kolben-Einheit verschiebbares Druckstück sowie dazwischen ein in Längsrichtung verschieblich gelagertes Stauchrohr vorgesehen sind, wobei sowohl das Druckstück, wie auch das Stauchrohr Mittel aufweisen, die ein freies Verdrehen der Litze beim Stauchen ermöglichen, dadurch gekennzeichnet, daß der Rahmen (10) zwei im gegenseitigen Abstand voneinander gehaltene Seitenwangen (11) aufweist, die an ihrem einen Ende die Klemmvorrichtung (20) tragen und an deren anderem Ende ein Gleitschlitten (30) verschiebbar ist, der einerseits das Druckstück (31) trägt und an dem andererseits die Zylinder-­Kolben-Einheit (40) befestigt ist, daß die Klemmbacken (22) mit Hilfe von in Reihen angeordneten Kniehebeln (21) parallel zu festen Gegenbacken (26) geführt sind und daß an dem Rahmen (10) ein zweiarmiger Hebel (42) schwenkbar gelagert ist, dessen eines Ende (45) mit der Zylinder-Kolben-Einheit (40) in Wirkverbindung steht, während sein anderes Ende (44) sich gegen die Stirnflächen der Klemmbacken (22) abstützt.1. Device for producing a bulge at the end of a strand of steel wire as anchoring in components made of concrete, the strand being axially compressed at its free end over a region of its length and thus the individual wires being axially deformed with spreading, consisting of a frame , at one end of which there is a clamping device with two clamping jaws and at the other end of which there is a pressure piece which can be displaced by means of a cylinder-piston unit which can be acted on from both sides, and in between a compression tube which is displaceably mounted in the longitudinal direction, both the pressure piece and the compression tube having means which enable the strand to be twisted freely during upsetting, characterized in that the frame (10) has two side cheeks (11) which are spaced from one another and which carry the clamping device (20) at one end and a sliding carriage () at the other end. 30) is displaceable, the one hand the pressure piece (31) and on the other hand, the cylinder-piston unit (40) is fastened, that the clamping jaws (22) are guided parallel to fixed counter-jaws (26) by means of toggle levers (21) arranged in rows and that on the frame (10) a two-armed lever (42) is pivotally mounted, one end (45) of which is operatively connected to the cylinder-piston unit (40), while its other end (44) is supported against the end faces of the clamping jaws (22). 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß an den Längsrändern der Seitenwangen (11) Gleitbahnen (12) für den Gleitschlitten (30) vorgesehen sind.2. Device according to claim 1, characterized in that on the longitudinal edges of the side cheeks (11) slideways (12) for the sliding carriage (30) are provided. 3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Gleitbahnen (12) an Gleitschienen gebildet sind.3. Apparatus according to claim 2, characterized in that the slideways (12) are formed on slide rails. 4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Gleitschlitten (30) zwischen den Seitenwangen (11) verschiebbar ist und die Gleitbahnen (12) übergreift.4. Device according to one of claims 1 to 3, characterized characterized in that the sliding carriage (30) can be moved between the side cheeks (11) and overlaps the sliding tracks (12). 5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß in den Seitenwangen (11) jeweils ein Längsschlitz (13) vorgesehen ist, in dem eine Gleitvorrichtung (51) für das Stauchrohr (50) kulissenartig geführt ist.5. Device according to one of claims 1 to 4, characterized in that in the side cheeks (11) in each case a longitudinal slot (13) is provided, in which a sliding device (51) for the compression tube (50) is guided in a backdrop. 6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß zwischen der Gleitvorrichtung (51) für das Stauchrohr (50) und dem Gleitschlitten (30) ein Reibschluß existiert.6. The device according to claim 5, characterized in that there is a frictional connection between the sliding device (51) for the upsetting tube (50) and the sliding carriage (30). 7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Klemmvorrichtung (20) mit einem einstellbaren Anschlag (23) für die Klemmbacken (22) versehen ist.7. Device according to one of claims 1 to 6, characterized in that the clamping device (20) is provided with an adjustable stop (23) for the clamping jaws (22). 8. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß an der Klemmvorrichtung (20) ein Öffnungsmechanismus für die Klemmbacken (22) vorgesehen ist.8. Device according to one of claims 1 to 7, characterized in that an opening mechanism for the clamping jaws (22) is provided on the clamping device (20). 9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß der Öffnungsmechanismus jeweils ein Federelement, vorzugsweise eine Druckfeder (24) aufweist, die über einen Stift (28′) den jeweiligen Klemmbacken (22) in Öffnungsrichtung drückt.9. The device according to claim 8, characterized in that the opening mechanism each has a spring element, preferably a compression spring (24) which presses the respective jaws (22) in the opening direction via a pin (28 '). 10. Vorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Klemmbacken (22) und die festen Gegenbacken (26) kreisbogenförmige Ausnehmungen (27) aufweisen, gegen die sich die an den Enden ebenfalls kreisbogenförmig abgerundeten Kniehebel (21) gelenkartig abstützen.10. Device according to one of claims 1 to 9, characterized in that the clamping jaws (22) and the fixed counter-jaws (26) have circular-shaped recesses (27) against which the toggle levers (21), which are also rounded at the ends, are supported in an articulated manner . 11. Vorrichtung nach Anspruch 10, dadurch gekennzeichnet, daß die Kniehebel (21) an den Klemmbacken (22) und/oder an den Gegenbacken (26) zusätzlich mittels Achsbolzen (28) gelagert sind.11. The device according to claim 10, characterized in that the toggle levers (21) on the clamping jaws (22) and / or on the counter jaws (26) are additionally mounted by means of axle bolts (28). 12. Vorrichtung nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß das Druckstück (31) eine Bohrung (33) zur Aufnahme des Zentraldrahtes einer Litze aufweist, deren Tiefe einstellbar ist.12. Device according to one of claims 1 to 11, characterized in that the pressure piece (31) has a bore (33) for receiving the central wire of a strand, the depth of which is adjustable. 13. Vorrichtung nach Anspruch 12, dadurch gekennzeichnet, daß zur Einstellung der Tiefe eine Einstellschraube (35) vorgesehen ist.13. The apparatus according to claim 12, characterized in that an adjusting screw (35) is provided for adjusting the depth. 14. Vorrichtung nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, daß eine Halterung (60) mit Handgriff (61) und Fuß (62) vorgesehen ist, die außen an den Seitenwangen (11) befestigt ist.14. Device according to one of claims 1 to 13, characterized in that a holder (60) with a handle (61) and foot (62) is provided, which is attached to the outside of the side cheeks (11).
EP86113719A 1985-11-02 1986-10-03 Apparatus for forming on a steel wire strand a bulge projecting outward Expired EP0222141B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86113719T ATE43876T1 (en) 1985-11-02 1986-10-03 DEVICE FOR CREATING A BULGE IN A STRAND OF STEEL WIRE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853538919 DE3538919A1 (en) 1985-11-02 1985-11-02 DEVICE FOR PRODUCING A BULB ON A LAMP OF STEEL WIRE
DE3538919 1985-11-02

Publications (3)

Publication Number Publication Date
EP0222141A2 true EP0222141A2 (en) 1987-05-20
EP0222141A3 EP0222141A3 (en) 1987-11-25
EP0222141B1 EP0222141B1 (en) 1989-06-07

Family

ID=6285024

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86113719A Expired EP0222141B1 (en) 1985-11-02 1986-10-03 Apparatus for forming on a steel wire strand a bulge projecting outward

Country Status (9)

Country Link
US (1) US4773247A (en)
EP (1) EP0222141B1 (en)
JP (1) JPS62107835A (en)
AT (1) ATE43876T1 (en)
CA (1) CA1255999A (en)
DE (2) DE3538919A1 (en)
ES (1) ES2009753B3 (en)
GR (1) GR3000147T3 (en)
NO (1) NO864012L (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5344256A (en) * 1988-11-14 1994-09-06 Garford Pty Ltd Rock anchor and method of manufacture
US7458242B2 (en) * 2004-09-13 2008-12-02 Dywidag-Systems International Pty Limited Apparatus and method for manufacturing a rock bolt
GB2507089A (en) * 2012-10-18 2014-04-23 Ccl Group Ltd An anchor having expanded sections in multi wired tendons
JP5847767B2 (en) * 2013-07-18 2016-01-27 株式会社日立ビルシステム Strand bending jig and strand bending method
JP6463236B2 (en) * 2015-09-04 2019-01-30 三菱電機ビルテクノサービス株式会社 Rope terminal processing equipment
CN108246950A (en) * 2017-12-22 2018-07-06 临沂市海纳电子有限公司 A kind of fried dough twist contact pin upset equipment automatically
CN108838300B (en) * 2018-08-06 2024-06-07 宁夏宝丰能源集团股份有限公司 Processing machine and system
CN113399494B (en) * 2021-07-13 2023-05-30 北京好运达智创科技有限公司 Steel strand wire bundling system and method
CN116374611B (en) * 2023-05-19 2023-08-15 太原福莱瑞达物流设备科技有限公司 A transport clamping jaw device for buffering feed cylinder

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Publication number Priority date Publication date Assignee Title
FR1084657A (en) * 1953-06-08 1955-01-21 Method and apparatus for forming a bead at the end of a wire rope
FR1548330A (en) * 1967-06-26 1968-12-06
US3824653A (en) * 1973-06-13 1974-07-23 R Sholler Wire grip
FR2411934A1 (en) * 1977-12-13 1979-07-13 Holzmann Philipp Ag Concrete reinforcing wire stranded steel cable anchor - is pear shaped with limited initial bend radius and hooked bent end
US4237942A (en) * 1975-11-21 1980-12-09 Hans Dietrich Apparatus to produce an anchor on a tendon twisted of several steel wires
DE3207957A1 (en) * 1982-03-05 1983-09-15 Dyckerhoff & Widmann AG, 8000 München METHOD FOR PRODUCING A BULB ON A STRING OF STEEL WIRE FOR ANCHORING IT IN COMPONENTS OF CONCRETE, AND DEVICE FOR CARRYING OUT THIS METHOD

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US406552A (en) * 1889-07-09 Apparatus for upsetting eye-bars
US1272176A (en) * 1917-03-03 1918-07-09 Toledo Commutator Co Commutator-assembling device.
CH593402A5 (en) * 1975-11-21 1977-11-30 Losinger Ag

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1084657A (en) * 1953-06-08 1955-01-21 Method and apparatus for forming a bead at the end of a wire rope
FR1548330A (en) * 1967-06-26 1968-12-06
US3824653A (en) * 1973-06-13 1974-07-23 R Sholler Wire grip
US4237942A (en) * 1975-11-21 1980-12-09 Hans Dietrich Apparatus to produce an anchor on a tendon twisted of several steel wires
FR2411934A1 (en) * 1977-12-13 1979-07-13 Holzmann Philipp Ag Concrete reinforcing wire stranded steel cable anchor - is pear shaped with limited initial bend radius and hooked bent end
DE3207957A1 (en) * 1982-03-05 1983-09-15 Dyckerhoff & Widmann AG, 8000 München METHOD FOR PRODUCING A BULB ON A STRING OF STEEL WIRE FOR ANCHORING IT IN COMPONENTS OF CONCRETE, AND DEVICE FOR CARRYING OUT THIS METHOD

Also Published As

Publication number Publication date
JPH0238049B2 (en) 1990-08-28
DE3663830D1 (en) 1989-07-13
CA1255999A (en) 1989-06-20
ATE43876T1 (en) 1989-06-15
DE3538919A1 (en) 1987-05-21
US4773247A (en) 1988-09-27
EP0222141A3 (en) 1987-11-25
EP0222141B1 (en) 1989-06-07
NO864012D0 (en) 1986-10-08
DE3538919C2 (en) 1987-12-23
JPS62107835A (en) 1987-05-19
NO864012L (en) 1987-05-04
GR3000147T3 (en) 1990-11-29
ES2009753B3 (en) 1989-10-16

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