EP0222141B1 - Vorrichtung zum Erzeugen einer Ausbauchung an einer Litze aus Stahldraht - Google Patents

Vorrichtung zum Erzeugen einer Ausbauchung an einer Litze aus Stahldraht Download PDF

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Publication number
EP0222141B1
EP0222141B1 EP86113719A EP86113719A EP0222141B1 EP 0222141 B1 EP0222141 B1 EP 0222141B1 EP 86113719 A EP86113719 A EP 86113719A EP 86113719 A EP86113719 A EP 86113719A EP 0222141 B1 EP0222141 B1 EP 0222141B1
Authority
EP
European Patent Office
Prior art keywords
clamping
jaws
clamping device
strand
clamping jaws
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
Application number
EP86113719A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0222141A3 (en
EP0222141A2 (de
Inventor
& Widmann Aktiengesellschaft Dyckerhoff
Original Assignee
Dyckerhoff and Widmann AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dyckerhoff and Widmann AG filed Critical Dyckerhoff and Widmann AG
Priority to AT86113719T priority Critical patent/ATE43876T1/de
Publication of EP0222141A2 publication Critical patent/EP0222141A2/de
Publication of EP0222141A3 publication Critical patent/EP0222141A3/de
Application granted granted Critical
Publication of EP0222141B1 publication Critical patent/EP0222141B1/de
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 displaceable 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 if the anchorage in question is to be concreted in firmly, i.e. if the tendon does not need to be tensioned at the anchor 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 is adjustable , in which no special devices and operations are required to remove the stranded wire, and which is also space-saving and 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, the clamping jaws open again automatically 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 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 arcuate recesses against which the toggle levers, which are also rounded at the ends, are supported in an articulated manner. In this way, considerably higher forces can be transmitted than if the support were only provided via axle bolts, which, however, can be provided, but then essentially only for pivoting the 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 made 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 allows different materials to be used and, in the event of any damage or soiling, the entire clamping device 20 can be replaced 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 are 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 axial pressure required for the compression of the strand can be exerted.
  • 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 moves back to the starting position shown in FIG. 1 after the production of a bulge on a strand.
  • 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. In this way, the clamping forces, which are very large due to the almost right-angled arrangement of the toggle levers 21 with respect 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.
  • 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 is the sliding carriage 30, which until then was held back in the axial direction by the stiffness of the strand, pulled with the pressure piece 31 against the clamping device 20, as a result of which the strand begins to bulge.
  • 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.
  • 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.

Landscapes

  • Architecture (AREA)
  • Engineering & Computer Science (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)
  • Vending Machines For Individual Products (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
EP86113719A 1985-11-02 1986-10-03 Vorrichtung zum Erzeugen einer Ausbauchung an einer Litze aus Stahldraht Expired EP0222141B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86113719T ATE43876T1 (de) 1985-11-02 1986-10-03 Vorrichtung zum erzeugen einer ausbauchung an einer litze aus stahldraht.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853538919 DE3538919A1 (de) 1985-11-02 1985-11-02 Vorrichtung zum erzeugen einer ausbauchung an einer litze aus stahldraht
DE3538919 1985-11-02

Publications (3)

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

Family

ID=6285024

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86113719A Expired EP0222141B1 (de) 1985-11-02 1986-10-03 Vorrichtung zum Erzeugen einer Ausbauchung an einer Litze aus Stahldraht

Country Status (9)

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

Families Citing this family (8)

* 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 (ja) * 2013-07-18 2016-01-27 株式会社日立ビルシステム ストランド折り曲げ治具、及びストランド折り曲げ方法
JP6463236B2 (ja) * 2015-09-04 2019-01-30 三菱電機ビルテクノサービス株式会社 ロープ端末加工装置
CN108246950A (zh) * 2017-12-22 2018-07-06 临沂市海纳电子有限公司 一种麻花插针自动墩粗设备
CN113399494B (zh) * 2021-07-13 2023-05-30 北京好运达智创科技有限公司 一种钢绞线制束系统及方法
CN116374611B (zh) * 2023-05-19 2023-08-15 太原福莱瑞达物流设备科技有限公司 一种用于缓冲料筒的转运夹爪装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US406552A (en) * 1889-07-09 Apparatus for upsetting eye-bars
US1272176A (en) * 1917-03-03 1918-07-09 Toledo Commutator Co Commutator-assembling device.
FR1084657A (fr) * 1953-06-08 1955-01-21 Procédé et appareil pour la formation d'un bourrelet à l'extrémité d'un câble métallique
FR1548330A (el) * 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
CH593402A5 (el) * 1975-11-21 1977-11-30 Losinger Ag
DE2755454C2 (de) * 1977-12-13 1982-02-11 Philipp Holzmann Ag, 6000 Frankfurt Verankerung mit einem Haftanker an einer Litze und Vorrichtung zur Herstellung einer Verankerung
DE3207957C2 (de) * 1982-03-05 1986-01-16 Dyckerhoff & Widmann AG, 8000 München Verfahren zum Erzeugen einer Ausbauchung an einer Litze aus Stahldrähten zu ihrer Verankerung in Bauteilen aus Beton sowie Vorrichtung zur Durchführung dieses Verfahrens

Also Published As

Publication number Publication date
DE3538919A1 (de) 1987-05-21
ES2009753B3 (es) 1989-10-16
JPS62107835A (ja) 1987-05-19
US4773247A (en) 1988-09-27
ATE43876T1 (de) 1989-06-15
DE3663830D1 (en) 1989-07-13
NO864012L (no) 1987-05-04
EP0222141A3 (en) 1987-11-25
CA1255999A (en) 1989-06-20
NO864012D0 (no) 1986-10-08
DE3538919C2 (el) 1987-12-23
GR3000147T3 (en) 1990-11-29
EP0222141A2 (de) 1987-05-20
JPH0238049B2 (el) 1990-08-28

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