EP0279252A1 - Method for making an endless sling - Google Patents

Method for making an endless sling Download PDF

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Publication number
EP0279252A1
EP0279252A1 EP88101315A EP88101315A EP0279252A1 EP 0279252 A1 EP0279252 A1 EP 0279252A1 EP 88101315 A EP88101315 A EP 88101315A EP 88101315 A EP88101315 A EP 88101315A EP 0279252 A1 EP0279252 A1 EP 0279252A1
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EP
European Patent Office
Prior art keywords
protective tube
length
scrim
fabric
compressed
Prior art date
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Granted
Application number
EP88101315A
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German (de)
French (fr)
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EP0279252B1 (en
Inventor
Hans-Otto Von Danwitz
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Spanset Inter AG
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Spanset Inter AG
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Publication date
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Priority to AT88101315T priority Critical patent/ATE58565T1/en
Publication of EP0279252A1 publication Critical patent/EP0279252A1/en
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    • 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
    • D07B7/165—Auxiliary apparatus for making slings

Definitions

  • the invention relates to a method for producing a round sling, as is used in particular for lifting purposes. Such a manufacturing process is the subject of DE-A-27 16 056.
  • the protective hose consisting of a textile tubular fabric alone has the function of protecting the scrim over the entire circumferential length of the round sling against mechanical damage from the outside, since the thread strand of the scrim usually consists of synthetic yarns. Synthetic threads are known to be particularly sensitive to notches or cuts.
  • the protective hose is slightly creased in the circumferential direction of the round sling. An expansion that occurs in the event of a load and thus an increase in the circumferential length of the laid scrim still does not result in the action of a tensile load and thus in a risk of damage to the protective tube.
  • the maximum service life or service life of such a round sling is primarily determined by the service life or service life of the protective tube. If this is damaged in one place, the round sling must be retired for reasons of accident prevention.
  • a special feature of the manufacturing method of the round sling known from DE-A-27 16 056 is that for the machine insertion of the thread wrap the one-piece protective tube of greater circumferential length than the thread wrap must be compressed in the longitudinal direction of the tube to a length which is far less than half that Starting length of the protective tube is.
  • the required compression of the hose wall with the desired wall thickness can only be achieved by one Widening of the tube fabric, that is to say can be achieved by enlarging the tube cross-section.
  • a hose enlargement does not only require an expensive, additional use of textile material. It also worsens the usage properties of the round sling because the protective hose takes up an unnecessarily large amount of space in the crane hook.
  • a cross-sectional shape that is as circular as possible is advantageous because it can be accommodated particularly easily in a crane hook.
  • the regular inspection of round slings in use primarily relates to whether the tubular fabric is undamaged, i.e. has no passages to the load-bearing scrim due to mechanical influences from the outside. Such passages are easily ascertainable from the outside on protective tubes with only one fabric layer between the marginal edges of the tube fabric.
  • a double fabric layer forming the tube wall between the edge edges of the protective tube there is a risk that, for example, sharp metal chips initially only penetrate the outer fabric layer, which is not or only comparatively difficult to determine from the outside because of the inner fabric layer remaining undamaged in the penetration area. Then penetrated metal chips move between the outer and inner layers of the protective hose, where they are invisible from the outside. This hiking is completely unhindered.
  • the invention has for its object to provide a manufacturing method of the type mentioned, by means of which the wall thickness of the two fabric layers of the tubular fabric can be largely increased as desired without excessive expenditure on textile material.
  • This object is achieved by the characterizing features of claim 1.
  • the solution is briefly that the total length of the protective tube is divided into two preferably equally long length sections of the tubular fabric before the scrim is drawn in in the conventional manner. This division into two lengths has the advantage that the Schluach fabric in the area of both lengths no longer needs to be compressed in the longitudinal direction to at least about 40%, but now only to about 80% to 90% of its original length in order to machine the laid scrim in a conventional manner Way to contribute.
  • the round sling produced according to the invention differs from a conventional round sling of the type mentioned at the outset, except for the greater wall thickness of both fabric layers of the tubular fabric, only in that the protective tube does not consist of a single tubular fabric part, but rather consists of two tubular fabric parts which are attached to one another in the circumferential direction and which end together connected, in particular sewn together.
  • the spool table 1 of the device for introducing the laid scrim 2 into the longitudinal sections 3, 4 of the protective tube 5 of the round sling (FIG. 4) carries a plurality of synthetic threads 7 wound on spools 6.
  • the threads 7 can be turned by rotating the spool table 1 in the direction of the arrow 1 ⁇ are twisted together to form a strand 8.
  • the thread strand 8 can also be referred to as a thread cardel.
  • the length sections 3, 4 of the protective tube 5 are cut off from a tube fabric woven in any length. Their length corresponds to slightly more than half the circumferential length of the round sling according to FIG. 4 plus an excess for the mutual overlap 9 in the region of their ends.
  • a seam 10 is provided which prevents the two longitudinal sections 3, 4 from loosening from one another and thus preventing the laid scrim from being exposed.
  • the two longitudinal sections 3, 4 are each pushed over a channel-like support body 11 in the longitudinal direction of the hose.
  • the support body 11 has the cross-sectional shape of approximately a tube halved in the longitudinal direction.
  • the longitudinal sections 3, 4 of the protective tube 5 are compressed in such a way that their compression length is approximately 80 to 90% of their initial length as a tubular fabric.
  • the length of the support body 11 corresponds approximately to the compression length of the two length sections 3, 4.
  • both support bodies 7 with the longitudinal sections 3 and 4 surrounding them are guided between the two wheel disks 12, 13.
  • the wheel disks 12, 13 lie with their plane of rotation in the same vertical plane.
  • the wheel disc 12 can be driven by a motor in the direction of the arrow 14. It is mounted fixed on the machine frame, which is represented by a bearing arm 15.
  • the wheel disc 13 is only freely rotatably mounted on the bearing arm 16.
  • the bearing arm 16 is mounted on both sides of the machine frame in the arrow direction 16eitig.
  • the distance between the two wheel disks 12, 13 can be varied. This distance, together with the diameter of both wheel disks 12, 13, determines the desired circumferential length of the round sling to be produced.
  • the wheel disks 12, 13 can be mounted on one side in order to facilitate the removal of the thread scrim 2 from the wheel disks 12, 13 after the thread scrim 2 has been drawn into the two longitudinal sections 3, 4 of the protective tube 5 that is to become the later.
  • the two supporting bodies 11 with the compressed longitudinal sections 3 or 4 pushed onto them are arranged in the longitudinal direction within the vertical plane running through the plane of the wheel disks 12, 13 that the The central longitudinal axes 17, 18 of the two semi-tubular support bodies 11 or the longitudinal sections 3, 4, which are seated on them in a compressed form, coincide approximately with the tangents 21 and 22, respectively, through the upper vertices 19 and the lower vertices 20 of the two wheel disks 12, 13.
  • the first length section 3 surrounds the upper run 24 and the second length section 4 surrounds the lower run 25 of the cable drive.
  • the end-side knotting of the thread strand 8 to form this cable drive is to be carried out in such a way that the thread strand 8 lies relatively firmly on the circumference of the wheel disks 12, 13, so that there is frictional engagement with the wheel disks 12, 13.
  • the only important thing is the production of a cable drive and not the number of wheel disks 12, 13 of this cable drive. It is very conceivable to work with a rope drive containing four wheel disks instead of only two wheel disks, as in the exemplary embodiment, in which case each wheel disk then only causes a deflection of approximately 90 °. Such a design of the manufacturing device can be advantageous for frictional reasons.
  • the number of revolutions of the knot 23 consequently corresponds to the number of turns of thread strands 8 in the later laid scrim 2, which runs within the two length sections 3, 4.
  • the drive of the wheel disk 12 is switched off, which can be done by an automatic control device.
  • the rear end 26 of the thread strand 8 is then cut off from the feed side of the threads 7.
  • the laid scrim 2 consisting of a large number of thread strand turns, is removed from the wheel disks 12, 13.
  • the support body 11 are then pulled out of the compressed longitudinal sections 3, 4 of the later tubular casing 5.
  • the length sections 3, 4 are pulled apart to their original starting length in the circumferential direction of the laid scrim 2.
  • the ends of the longitudinal sections 3, 4 are inserted into one another to form the overlap 9 and connected to one another by the seam 10.
  • the manufacturing method according to the invention makes it possible, with a constant width of the tubular fabric or a constant inner cross-section of the protective tube intended to accommodate the laid scrim 2, to design the tubular fabric, for example to increase wear resistance, in such a way that it is compressible to a much lesser extent than in the conventional one Manufacturing process is required.

Landscapes

  • Load-Engaging Elements For Cranes (AREA)
  • Ropes Or Cables (AREA)
  • Package Frames And Binding Bands (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Compounds Of Unknown Constitution (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Wire Bonding (AREA)
  • Preparing Plates And Mask In Photomechanical Process (AREA)
  • Electron Beam Exposure (AREA)
  • Forging (AREA)
  • Eyeglasses (AREA)
  • Woven Fabrics (AREA)

Abstract

A skein of yarn is drawn through a protective tube prefabricated of a woven, tubular textile fabric and is connected in order to form an endless sling. The protective tube is formed of two length sections. These length sections, which are of approximately the same length, are pushed together only slightly during the manufacturing process. In this pushed-together form, they surround the upper reach and the lower reach of the drive formed during drawing in of the skein of yarn by the strands of yarn which are placed around the wheel discs of the manufacturing apparatus.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung einer Rundschlinge, wie sie insbesondere zu Hebezwecken verwendet wird. Ein derartiges Herstellungsverfahren ist Gegenstand von DE-A-27 16 056.The invention relates to a method for producing a round sling, as is used in particular for lifting purposes. Such a manufacturing process is the subject of DE-A-27 16 056.

Bei derartigen Rundschlingen hat der aus einem textilen Schlauchgewebe bestehende Schutzschlauch allein die Funktion, das Fadengelege über die gesamte Umfangs­länge der Rundschlinge gegen mechanische Beschädigung von außen zu schützen, da der Fadenstrang des Faden­geleges in der Regel aus synthetischen Garnen besteht. Synthetikfäden sind bekanntlich besonders kerb- bzw. schnittempfindlich.In such round slings, the protective hose consisting of a textile tubular fabric alone has the function of protecting the scrim over the entire circumferential length of the round sling against mechanical damage from the outside, since the thread strand of the scrim usually consists of synthetic yarns. Synthetic threads are known to be particularly sensitive to notches or cuts.

Der Schutzschlauch liegt in Umfangsrichtung der Rundschlinge leicht in Falten. Eine im Belastungsfall eintretende Dehnung und somit Vergrößerung der Umfangs­länge des Fadengeleges führt dadurch immer noch nicht zur Einwirkung einer Zugbelastung und somit zu einer Beschädigungsgefahr des Schutzschlauches.The protective hose is slightly creased in the circumferential direction of the round sling. An expansion that occurs in the event of a load and thus an increase in the circumferential length of the laid scrim still does not result in the action of a tensile load and thus in a risk of damage to the protective tube.

Ein weiteres Merkmal dieser Rundschlingen besteht darin, daß der Innenquerschnitt des aus textilem Schlauchgewebe bestehenden Schutzschlauches nicht etwa prall, sondern nur zu etwa 60% bis 70% des maximalen Schlauchquerschnittes vom Fadengelege gefüllt ist. Dadurch ist sichergestellt, daß sich der Schlauch gegenüber dem Fadengelege und die einzelnen Fadenstränge gegeneinander zum selbsttätigen Last­ausgleich leicht verschieben können.Another feature of these round slings is that the inner cross-section of the protective hose made of textile hose fabric is not rough, but is only filled to about 60% to 70% of the maximum hose cross-section by the laid scrim. This ensures that the hose can move slightly relative to the scrim and the individual strands of thread against each other for automatic load balancing.

Die maximale Lebensdauer bzw. Standzeit einer derartigen Rundschlinge wird in erster Linie bestimmt durch die Lebensdauer bzw. Standzeit des Schutzschlauches. Ist dieser an einer Stelle beschädigt, so muß die Rundschlinge aus Gründen der Unfallverhütung aus­gemustert werden.The maximum service life or service life of such a round sling is primarily determined by the service life or service life of the protective tube. If this is damaged in one place, the round sling must be retired for reasons of accident prevention.

Ein besonderes Merkmal des aus DE-A-27 16 056 bekannten Herstellungsverfahrens der Rundschlinge besteht darin, daß zum maschinellen Einbringen des Fadenwickels der einteilige Schutzschlauch von größerer Umfangslänge als der Fadenwickel in Schlauchlängsrichtung auf eine Länge gestaucht werden muß, die weit weniger als die Hälfte der Ausgangslänge des Schutzschlauches beträgt.A special feature of the manufacturing method of the round sling known from DE-A-27 16 056 is that for the machine insertion of the thread wrap the one-piece protective tube of greater circumferential length than the thread wrap must be compressed in the longitudinal direction of the tube to a length which is far less than half that Starting length of the protective tube is.

Zur Erhöhung der Verschleißfestigkeit des aus textilem Schlauchgewebe bestehenden Schutzschlauches ist es bekannt, das Schlauchgewebe mit einer größeren Wandstärke zu versehen, also mehr Textilwerkstoff zu verarbeiten. Die Vergrößerung der Wandstärke des textilen Schlauchgewebes führt jedoch zu einer Erschwerung des vorbekannten Herstellungsverfahrens und ist daher nur begrenzt möglich. Je größer nämlich die Wandstärke des textilen Schlauchgewebes ist, um so schwerer läßt es sich in Schlauchlängsrichtung auf die erforderlichen mindestens ca. 40% oder noch weniger der Umfangslänge des Fadenwickels stauchen, ohne durch die damit verbundene Minderung des lichten Innenquerschnitts des Schutzschlauches die Einbringung des Fadenwickels zu erschweren oder sogar unmöglich zu machen. Eine gleiche Erschwernis ergibt sich bei einer Verstärkung des Schlauchgewebes durch Beigabe verschleißfester Fäden, z.B. Metallfäden, oder durch eine Beschichtungsauflage. Es kann in solchen Fällen die erforderliche Stauchung des wunsch­gemäß wandstarken Schlauchgewebes nur durch eine Verbreiterung des Schlauchgewebes, also durch eine Vergrößerung des Schlauchquerschnittes erreicht werden. Eine solche Schlauchvergrößerung erfordert jedoch nicht nur einen kostspieligen, zusätzlichen Einsatz von Textilwerkstoff. Sie verschlechtert auch die Gebrauchseigenschaften der Rundschlinge, weil der Schutzschlauch unnötig viel Raum im Kranhaken beansprucht. Für die Handhabung der Rundschlinge während ihrer Nutzungsdauer ist nämlich eine möglichst kreisähnliche Querschnittsform von Vorteil, weil sie sich besonders leicht in einem Kranhaken unterbrin­gen läßt.To increase the wear resistance of the protective hose made of textile hose fabric, it is known to provide the hose fabric with a greater wall thickness, that is to say to process more textile material. However, increasing the wall thickness of the textile tubular fabric complicates the previously known manufacturing process and is therefore only possible to a limited extent. The greater the wall thickness of the textile hose fabric, the more difficult it is to compress the required at least approx. 40% or even less of the circumferential length of the thread wrap in the longitudinal direction of the hose, without the introduction of the thread wrap due to the reduction in the internal cross-section of the protective hose to make it difficult or even impossible. The same difficulty arises when reinforcing the tubular fabric by adding wear-resistant threads, for example metal threads, or by means of a coating layer. In such cases, the required compression of the hose wall with the desired wall thickness can only be achieved by one Widening of the tube fabric, that is to say can be achieved by enlarging the tube cross-section. However, such a hose enlargement does not only require an expensive, additional use of textile material. It also worsens the usage properties of the round sling because the protective hose takes up an unnecessarily large amount of space in the crane hook. For the handling of the round sling during its service life, a cross-sectional shape that is as circular as possible is advantageous because it can be accommodated particularly easily in a crane hook.

Es wurde bereits dazu übergegangen, zur vermeintlichen Erhöhung der Verschleißfestigkeit des Schutzschlauches von Rundschlingen ein textiles Schlauchgewebe mit insgesamt vier Gewebelagen zwischen seinen beiden Geweberandkanten herzustellen, so daß das darin einliegende Fadengelege zwischen den beiden Randkanten beidseitig von zwei Gewebelagen nach außen geschützt ist. Diese Art der Ausbildung des Schlauchgewebes mag zwar seine Stauchbarkeit zum Einbringen des Fadengeleges erleichtern. Es hat sich jedoch heraus­gestellt, daß mit solchen Schutzschläuchen versehene Rundschlingen einer besonderen Unfallgefahr unterliegen.It has already begun to produce a textile tubular fabric with a total of four fabric layers between its two fabric edge edges to allegedly increase the wear resistance of the protective tube of round slings, so that the laid scrim between the two edge edges is protected on both sides by two fabric layers on the outside. This type of formation of the tubular fabric may facilitate its compressibility for the introduction of the laid scrim. However, it has been found that round slings provided with such protective tubes are subject to a particular risk of accident.

Die regelmäßige Überprüfung von im Gebrauch befindlichen Rundschlingen bezieht sich in erster Linie darauf, ob das Schlauchgewebe unbeschädigt ist, also keine auf mechanische Einwirkungen von außen zurückzuführenden Durchtritte zum tragenden Fadengelege aufweisen. Solche Durchtritte sind an Schutzschläuchen mit jeweils nur einer Gewebelage zwischen den Randkanten des Schlauchgewebes von außen leicht feststellbar. Bei einer die Schlauchwand bildenden doppelten Gewebe­lage zwischen den Randkanten des Schutzschlauches besteht jedoch die Gefahr, daß z.B. scharfe Metallspäne zunächst nur die äußere Gewebelage durchdringen, was wegen der im Durchdringungsbereich unbeschädigt bleibenden inneren Gewebelage von außen nicht oder nur vergleichsweise schwer feststellbar ist. Dann wandern eingedrungene Metallspäne zwischen der Gewebe­außen- und der Gewebeinnenlage des Schutzschlauches, wo sie von außen unsichtbar sind. Dieses Wandern erfolgt völlig ungehindert. Wenn dann diese gewisser­maßen zwischen Gewebeaußenlage und Gewebeinnenlage des Schutzschlauches vagabundierenden Metallspäne irgendwo auch die Gewebeinnenlage durchstoßen, das Fadengelege beschädigen und somit die maximale Traglast der Hebeschlinge herabsetzen, so ist dies von außen durch eine normale, optische Überprüfung der Rund­schlinge bzw. des Rundschlingen-Schutzschlauches nicht feststellbar.The regular inspection of round slings in use primarily relates to whether the tubular fabric is undamaged, i.e. has no passages to the load-bearing scrim due to mechanical influences from the outside. Such passages are easily ascertainable from the outside on protective tubes with only one fabric layer between the marginal edges of the tube fabric. In the case of a double fabric layer forming the tube wall between the edge edges of the protective tube, however, there is a risk that, for example, sharp metal chips initially only penetrate the outer fabric layer, which is not or only comparatively difficult to determine from the outside because of the inner fabric layer remaining undamaged in the penetration area. Then penetrated metal chips move between the outer and inner layers of the protective hose, where they are invisible from the outside. This hiking is completely unhindered. If metal shavings straying somewhere between the outer fabric layer and the inner fabric layer of the protective hose then also penetrate the inner fabric layer, damage the scrim and thus reduce the maximum load capacity of the lifting sling, this is not possible from the outside through a normal, visual inspection of the round sling or the round sling protective hose noticeable.

Der Erfindung liegt die Aufgabe zugrunde, ein Herstel­lungsverfahren der eingangs genannten Art zu schaffen, durch welches ohne einen übermäßigen Aufwand an textilem Werkstoff die Wandstärke der beiden Gewebelagen des Schlauchgewebes weitgehend beliebig erhöht werden kann. Diese Aufgabe wird durch die Kennzeichnungs­merkmale des Anspruches 1 gelöst. Die Lösung besteht kurz darin, daß die Gesamtlänge des Schutzschlauches aufgeteilt wird in zwei vorzugsweise gleichlange Längenabschnitte des Schlauchgewebes, bevor das Fadengelege in der herkömmlichen Weise eingezogen wird. Diese Aufteilung in zwei Längenabschnitte hat den Vorteil, daß das Schluachgewebe im Bereich beider Längenabschnitte nicht mehr auf mindestens etwa 40%, sondern nunmehr nur noch auf etwa 80% bis 90% seiner Ausgangslänge in Längsrichtung gestaucht zu werden braucht, um das Fadengelege maschinell in herkömmlicher Weise einbringen zu können. Dieser geringe Stauchungsgrad ermöglicht es, die textile Wandstärke beider Gewebelagen des Schlauchgewebes wesentlich zu vergrößern, ohne deswegen zur Unter­bringung eines Fadenwickels mit derselben Tragfähigkeit die Breite des Schaluchgewebes und damit seinen Aufnahmequerschnitt allein aus fertigungstechnischen Gründen vergrößern zu müssen. Auch erfordert dieses Verfahren keinen wesentlichen apparativen Mehraufwand. Im Ergebnis unterscheidet sich dann die erfindungsgemäß hergestellte Rundschlinge von einer herkömmlichen Rundschlinge der eingangs genannten Art außer durch die größere Wandstärke beider Gewebelagen des Schlauch­gewebes nur dadurch, daß der Schutzschlauch nicht aus einem einzigen Schlauchgewebeteil, sondern aus zwei in Umfangsrichtung aneinandergesetzten Schlauch­gewebeteilen besteht, die endseitig miteinander verbunden, insbesondere miteinander vernäht sind.The invention has for its object to provide a manufacturing method of the type mentioned, by means of which the wall thickness of the two fabric layers of the tubular fabric can be largely increased as desired without excessive expenditure on textile material. This object is achieved by the characterizing features of claim 1. The solution is briefly that the total length of the protective tube is divided into two preferably equally long length sections of the tubular fabric before the scrim is drawn in in the conventional manner. This division into two lengths has the advantage that the Schluach fabric in the area of both lengths no longer needs to be compressed in the longitudinal direction to at least about 40%, but now only to about 80% to 90% of its original length in order to machine the laid scrim in a conventional manner Way to contribute. This low degree of compression enables the textile To increase the wall thickness of both fabric layers of the tubular fabric significantly without having to enlarge the width of the fabric and thus its receiving cross-section solely for manufacturing reasons to accommodate a thread wrap with the same load-bearing capacity. This method also does not require any significant additional equipment. As a result, the round sling produced according to the invention differs from a conventional round sling of the type mentioned at the outset, except for the greater wall thickness of both fabric layers of the tubular fabric, only in that the protective tube does not consist of a single tubular fabric part, but rather consists of two tubular fabric parts which are attached to one another in the circumferential direction and which end together connected, in particular sewn together.

Das Herstellungsverfahren und die Rundschlinge nach der Erfindung werden anhand der Zeichnung näher erläutert. Darin zeigen:

  • Fig. 1 eine Schematische Darstellung einer Vorrich­tung zur Verfahrensdurchführung,
  • Fig. 1a einen vergrößerten Detailschnitt aus Fig. 1,
  • Fig. 2 einen Schnitt entsprechend der Linie II-II in Fig. 1 durch die gestauchten Schlauch-­Längenabschnitte mit eingezogenem Fadengelege,
  • Fig. 3 eine schematische Darstellung des nackten Fadengeleges, welches hier aus Gründen der besseren Übersichtlichkeit nur aus drei Windungen besteht,
  • Fig. 4 eine verkleinerte Ansicht der fertigen Rund­schlinge,
  • Fig. 5 eine vergrößerte, schematische Darstellung des Überlappungsbereiches der Längenabschnitte des Schutzschlauches gemäß Pfeil V in Fig. 4.
The manufacturing method and the round sling according to the invention are explained in more detail with reference to the drawing. In it show:
  • 1 is a schematic representation of an apparatus for performing the method,
  • 1a shows an enlarged detail section from FIG. 1,
  • 2 shows a section along the line II-II in FIG. 1 through the compressed hose length sections with the laid scrim,
  • 3 shows a schematic representation of the bare scrim, which here consists of only three turns for reasons of better clarity,
  • 4 is a reduced view of the finished round sling,
  • 5 is an enlarged, schematic representation of the overlap area of the longitudinal sections of the protective tube according to arrow V in FIG. 4.

Der Spultisch 1 der Vorrichtung zum Einbringen des Fadengeleges 2 in die Längenabschnitte 3,4 des Schutz­schlauches 5 der Rundschlinge (Fig. 4) trägt eine Mehrzahl von auf Spulen 6 aufgewickelten, synthetischen Fäden 7. Die Fäden 7 können durch Drehung des Spul­tisches 1 in Pfeilrichtung 1ʹ zu einem Fadenstrang 8 miteinander verdrillt werden. Der Fadenstrang 8 ist auch als Fadenkardeel zu bezeichnen. Die Längen­abschnitte 3,4 des Schutzschlauches 5 sind von einem in beliebiger Länge gewebten Schlauchgewebe abgeschnit­ten. Ihre Länge entspricht etwas mehr als der Hälfte der Umfangslänge der Rundschlinge gemäß Fig. 4 zuzüglich einem Übermaß für die gegenseitige Überlappung 9 im Bereich ihrer Enden. Im Bereich der Überlappung 9 der Enden der beiden Längenabschnitte 3,4 des Schutzschlauches 5 bei der fertigen Rundschlinge ist eine Naht 10 vorgesehen, die eine Lösung der beiden Längenabschnitte 3,4 voneinander und damit ein Freiliegen des Fadengeleges verhindert.The spool table 1 of the device for introducing the laid scrim 2 into the longitudinal sections 3, 4 of the protective tube 5 of the round sling (FIG. 4) carries a plurality of synthetic threads 7 wound on spools 6. The threads 7 can be turned by rotating the spool table 1 in the direction of the arrow 1ʹ are twisted together to form a strand 8. The thread strand 8 can also be referred to as a thread cardel. The length sections 3, 4 of the protective tube 5 are cut off from a tube fabric woven in any length. Their length corresponds to slightly more than half the circumferential length of the round sling according to FIG. 4 plus an excess for the mutual overlap 9 in the region of their ends. In the area of the overlap 9 of the ends of the two longitudinal sections 3, 4 of the protective tube 5 in the finished round sling, a seam 10 is provided which prevents the two longitudinal sections 3, 4 from loosening from one another and thus preventing the laid scrim from being exposed.

Die beiden Längenabschnitte 3,4 sind jeweils in Schlauchlängsrichtung über einen rinnenartigen Stütz­körper 11 geschoben. Der Stützkörper 11 weist die Querschnittsform etwa eines in Längsrichtung halbierten Rohres auf. In Längsrichtung des Stützkörpers 11 sind die Längenabschnitte 3,4 des Schutzschlauches 5 gestaucht derart, daß ihre Stauchlänge etwa 80 bis 90% ihrer Ausgangslänge als Schlauchgewebe beträgt. Die Länge des Stützkörpers 11 entspricht etwa der Stauchlänge der beiden Längenabschnitte 3,4.The two longitudinal sections 3, 4 are each pushed over a channel-like support body 11 in the longitudinal direction of the hose. The support body 11 has the cross-sectional shape of approximately a tube halved in the longitudinal direction. In the longitudinal direction of the support body 11, the longitudinal sections 3, 4 of the protective tube 5 are compressed in such a way that their compression length is approximately 80 to 90% of their initial length as a tubular fabric. The length of the support body 11 corresponds approximately to the compression length of the two length sections 3, 4.

Danach werden beide Stützkörper 7 mit den sie umgebenden Längenabschnitten 3 bzw. 4 zwischen die beiden Rad­scheiben 12,13 geführt. Die Radscheiben 12,13 liegen mit ihrer Rotationsebene in derselben Vertikalebene.Then both support bodies 7 with the longitudinal sections 3 and 4 surrounding them are guided between the two wheel disks 12, 13. The wheel disks 12, 13 lie with their plane of rotation in the same vertical plane.

Die Radscheibe 12 ist motorisch in Pfeilrichtung 14 antreibbar. Sie ist ortsfest am Maschinengestell gelagert, was durch einen Lagerarm 15 dargestellt ist.The wheel disc 12 can be driven by a motor in the direction of the arrow 14. It is mounted fixed on the machine frame, which is represented by a bearing arm 15.

Die Radscheibe 13 ist lediglich frei drehbar am Lagerarm 16 gelagert. Der Lagerarm 16 ist in Pfeil­richtung 16ʹ beidseitig verschiebbar am Maschinengestell gelagert. Hierdurch kann der Abstand zwischen den beiden Radscheiben 12,13 variiert werden. Dieser Abstand bestimmt gemeinsam mit dem Durchmesser beider Radscheiben 12,13 die Soll-Umfangslänge der herzu­stellenden Rundschlinge. Die Lagerung der Radscheiben 12,13 kann einseitig erfolgen, um nach dem Einziehen des Fadengeleges 2 in die beiden Längenabschnitte 3,4 des späteren Schutzschlauches 5 die Abnahme des Fadengeleges 2 von den Radscheiben 12,13 zu erleichtern.The wheel disc 13 is only freely rotatably mounted on the bearing arm 16. The bearing arm 16 is mounted on both sides of the machine frame in the arrow direction 16eitig. As a result, the distance between the two wheel disks 12, 13 can be varied. This distance, together with the diameter of both wheel disks 12, 13, determines the desired circumferential length of the round sling to be produced. The wheel disks 12, 13 can be mounted on one side in order to facilitate the removal of the thread scrim 2 from the wheel disks 12, 13 after the thread scrim 2 has been drawn into the two longitudinal sections 3, 4 of the protective tube 5 that is to become the later.

Zum Einziehen des Fadengeleges 2 in die beiden Längen­abschnitte 3,4 des späteren Schutzschlauches sind die beiden Stützkörper 11 mit den gestaucht auf sie aufgeschobenen Längenabschnitten 3 bzw. 4 so in Längsrichtung innerhalb der durch die Ebene der Radscheiben 12,13 verlaufenden Vertikalebene angeordnet, daß die Mittellängsachsen 17,18 der beiden halbrohr­artigen Stützkörper 11 bzw. der in gestauchter Form auf ihnen aufsitzenden Längenabschnitte 3,4 etwa mit den durch die oberen Scheitelpunkte 19 bzw. die unteren Scheitelpunkte 20 der beiden Radscheiben 12,13 gelegten Tangenten 21 bzw. 22 zusammenfallen. Dadurch umgibt der erste Längenabschnitt 3 das Obertrum 24 und der zweite Längenabschnitt 4 das Untertrum 25 des Seiltriebs.For pulling the scrim 2 into the two longitudinal sections 3, 4 of the protective hose that is later to be used, the two supporting bodies 11 with the compressed longitudinal sections 3 or 4 pushed onto them are arranged in the longitudinal direction within the vertical plane running through the plane of the wheel disks 12, 13 that the The central longitudinal axes 17, 18 of the two semi-tubular support bodies 11 or the longitudinal sections 3, 4, which are seated on them in a compressed form, coincide approximately with the tangents 21 and 22, respectively, through the upper vertices 19 and the lower vertices 20 of the two wheel disks 12, 13. As a result, the first length section 3 surrounds the upper run 24 and the second length section 4 surrounds the lower run 25 of the cable drive.

Danach wird der Fadenstrang 8 über den Umfang der rechten Radscheibe 12 durch den Stützkörper 11 mit dem geschrumpft auf diesen aufgeschobenen ersten Längenabschnitt 3 hindurch, von oben nach unten über den Umfang der linken Radscheibe 13 und von dort in umgekehrter Richtung durch den Stützkörper 11 mit dem gestaucht auf diesem aufliegenden zweiten Längenabschnitt 4 wieder zurück zur Radscheibe 12 geführt. Sodann wird dieses Ende des Fadenstranges 8 an dem vom Spultisch 1 kommenden Fadenstrang mittels des Knotens 23 verknotet. Durch diese Verknotung bildet der Fadenstrang 8 nunmehr einen in sich geschlos­senen Seiltrieb zwischen den beiden Radscheiben 12,13. Die endseitige Verknotung des Fadenstranges 8 zur Bildung dieses Seiltriebes ist so vorzunehmen, daß der Fadenstrang 8 verhältnismäßig fest auf dem Umfang der Radscheiben 12,13 aufliegt, damit ein Reibungsschluß gegenüber den Radscheiben 12,13 vorliegt. Bedeutsam ist allein die Herstellung eines Seiltriebes und nicht etwa die Anzahl der Radscheiben 12,13 dieses Seiltriebes. Es ist sehr wohl denkbar, an Stelle von nur zwei Radscheiben - wie im Ausführungs­beispiel - mit einem vier Radscheiben enthaltenden Seiltrieb zu arbeiten, bei welchem dann jede Radscheibe nur eine Umlenkung von ca. 90° bewirkt. Eine solche konstruktive Ausbildung der Herstellungsvorrichtung kann aus reibungstechnischen Gründen vorteilhaft sein.Thereafter, the thread strand 8 with the circumference of the right wheel disc 12 by the support body 11 the shrunk onto this pushed on first length section 3, from top to bottom over the circumference of the left wheel disc 13 and from there in the opposite direction through the support body 11 with the compressed second length section 4 resting on it back to the wheel disc 12. This end of the thread strand 8 is then knotted on the thread strand coming from the winding table 1 by means of the knot 23. As a result of this knotting, the thread strand 8 now forms a self-contained cable drive between the two wheel disks 12, 13. The end-side knotting of the thread strand 8 to form this cable drive is to be carried out in such a way that the thread strand 8 lies relatively firmly on the circumference of the wheel disks 12, 13, so that there is frictional engagement with the wheel disks 12, 13. The only important thing is the production of a cable drive and not the number of wheel disks 12, 13 of this cable drive. It is very conceivable to work with a rope drive containing four wheel disks instead of only two wheel disks, as in the exemplary embodiment, in which case each wheel disk then only causes a deflection of approximately 90 °. Such a design of the manufacturing device can be advantageous for frictional reasons.

Nunmehr wird der Antrieb der Radscheibe 12 in Pfeil­richtung 14 eingeschaltet. Hierdurch wird ein aus den vom Spultisch 1 abgezogenen Fäden 7 gebildeter, gedrillter Fadenstrang 8 durch die gestauchten Längen­abschnitte 3,4 des späteren Schutzschlauches 5 hindurch­gezogen. Jede volle Umlaufbahn des Knotens 23 bedeutet das Durchziehen einer weiteren Fadenstranglage durch beide gestauchten Längenabschnitte 3,4 des späteren Schutzschlauches 5.Now the drive of the wheel disc 12 is switched on in the direction of arrow 14. As a result, a twisted thread strand 8 formed from the threads 7 drawn from the winding table 1 is pulled through the compressed length sections 3, 4 of the protective tube 5. Each full orbit of the knot 23 means the pulling through of a further strand of thread through both compressed length sections 3, 4 of the protective tube 5.

Die Anzahl der Umläufe des Knotens 23 entspricht folglich der Anzahl der Windungen von Fadensträngen 8 im späteren Fadengelege 2, welches innerhalb der beiden Längenabschnitte 3,4 verläuft.The number of revolutions of the knot 23 consequently corresponds to the number of turns of thread strands 8 in the later laid scrim 2, which runs within the two length sections 3, 4.

Nachdem die Soll-Anzahl von Umläufen des Knotens 23 erreicht ist, wird der Antrieb der Radscheibe 12 abgeschaltet, was durch eine automatische Steuer­einrichtung erfolgen kann. Es wird dann das hintere Ende 26 des Fadenstranges 8 von der Zulaufseite der Fäden 7 abgeschnitten. Sodann wird das aus einer Vielzahl von Fadenstrang-Windungen bestehende Faden­gelege 2 von den Radscheiben 12,13 abgenommen. Die Stützkörper 11 werden anschließend aus den gestauchten Längenabschnitten 3,4 der späteren Schlauchhülle 5 herausgezogen. Die Längenabschnitte 3,4 werden auf ihre ursprüngliche Ausgangslänge in Umfangsrichtung des Fadengeleges 2 auseinandergezogen. Die Enden der Längenabschnitte 3,4 werden zur Bildung der Überlappung 9 ineinandergesteckt und durch die Naht 10 miteinander verbunden.After the desired number of revolutions of the node 23 has been reached, the drive of the wheel disk 12 is switched off, which can be done by an automatic control device. The rear end 26 of the thread strand 8 is then cut off from the feed side of the threads 7. Then the laid scrim 2, consisting of a large number of thread strand turns, is removed from the wheel disks 12, 13. The support body 11 are then pulled out of the compressed longitudinal sections 3, 4 of the later tubular casing 5. The length sections 3, 4 are pulled apart to their original starting length in the circumferential direction of the laid scrim 2. The ends of the longitudinal sections 3, 4 are inserted into one another to form the overlap 9 and connected to one another by the seam 10.

Durch das erfindungsgemäße Herstellungsverfahren ist es möglich, bei gleichbleibender Breite des Schlauchgewebes bzw. gleichbleibendem, zur Aufnahme des Fadengeleges 2 bestimmten Innenquerschnitt des Schutzschlauches das Schlauchgewebe z.B. zur Erhöhung der Verschleißfestigkeit so auszubilden, daß es in wesentlich geringerem Umfang stauchbar ist, als dies bei dem herkömmlichen Herstellungsverfahren erforderlich ist.The manufacturing method according to the invention makes it possible, with a constant width of the tubular fabric or a constant inner cross-section of the protective tube intended to accommodate the laid scrim 2, to design the tubular fabric, for example to increase wear resistance, in such a way that it is compressible to a much lesser extent than in the conventional one Manufacturing process is required.

BezugszeichenlisteReference symbol list

  • 1 Spultisch1 spool table
  • 1ʹ Drehrichtungspfeil1ʹ direction arrow
  • 2 Fadengelege2 laid scrims
  • 3 Längenabschnitt3 length section
  • 4 Längenabschnitt4 length section
  • 5 Schutzschlauch5 protective hose
  • 6 Spule6 coil
  • 7 Faden7 threads
  • 8 Fadenstrang8 thread strand
  • 9 Überlappung9 overlap
  • 10 Naht10 seam
  • 11 Stützkörper11 support body
  • 12 Radscheibe12 wheel disc
  • 13 Radscheibe13 wheel disc
  • 14 Pfeilrichtung14 arrow direction
  • 15 Lagerarm15 bearing arm
  • 16 Lagerarm16 bearing arm
  • 16ʹ Verschieberichtung16ʹ direction of displacement
  • 17 Mittellängsachse17 central longitudinal axis
  • 18 Mittellängsachse18 central longitudinal axis
  • 19 ob. Scheitelpunkt19 above. Vertex
  • 20 unt. Scheitelpunkt20 bottom apex
  • 21 Tangente21 tangent
  • 22 Tangente22 tangent
  • 23 Knoten23 knots
  • 24 Obertrum24 upper run
  • 25 Untertrum25 lower run
  • 26 hinteres Ende26 rear end

Claims (4)

1. Verfahren zur Herstellung einer Rundschlinge, die besteht aus
- einem Fadengelege (2) als tragender Kern und
- einem das Fadengelege (2) umgebenden Schutz­schlauch (5) aus einem textilen Schlauchgewebe mit zwischen dessen Randkanten zwei Gewebelagen.
Dieses Verfahren mit folgenden Herstellungsschritten: a) Der vorgefertigte Schutzschlauch (5) wird in seiner Länge gestaucht gehalten. b) Ein Fadenstrang (8), z.B. ein textiles Garn, wird durch den gestauchten Schutzschlauch (5) in dessen Längsrichtung hindurchgeführt. c) Der Fadenstrang (8) wird sodann nach Art des Seiles eines endlosen Seiltriebes mit seinen beidseitig aus dem gestauchten Schutzschlauch (5) hinausstehenden Bereichen über den Umfang jeweils einer Radscheibe (12,13) gelegt. d) Der Fadenstrang (8) wird zur Schließung des Seiltriebes gemäß c) mit dem noch nicht durch den Schutzschlauch (5) gezogenen Fadenstrang­bereich derart verbunden (Knoten 23), daß der gestauchte Schutzschlauch (5) eines der beiden Trums (24,25) des seiltriebartig um die Radscheiben (12,13) gelegten Fadenstranges (8) umgibt. e) Eine Radscheibe (12) wird zum Umlauf des gebil­deten Seiltriebes angetrieben derart, daß der noch nicht durch den Schutzschlauch (5) hindurchgezogene Fadenstrangbereich laufend nachgezogen wird und somit in einer Vielzahl von Einzelsträngen (8) den gestauchten Schutz­ schlauch (5) durchsetzt. f) Nach dem Abnehmen der in der gewünschten Anzahl liegenden Fadenstränge (8) von den Radscheiben (12,13) wird die Stauchung des Schutzschlauches (5) aufgehoben und die Enden des Schutzschlauches (5) werden derart miteinander verbunden, daß er nunmehr das Fadengelege (2) über mindestens dessen gesamte Umfangslänge umgibt, ist
      gekennzeichnet
durch folgende Merkmale: g) Der Fadenstrang (8) wird analog Herstellungs­schritt b) hintereinander durch zwei vereinzelte, gestaucht gehaltene Längenabschnitte (3,4) des Schutzschlauches (5) in Längsrichtung hindurchgeführt. h) Nach der Schließung des Seiltriebes analog Herstellungsschritt d) umgibt jeder Längen­abschnitt (3,4) des Schutzschlauches (5) ein anderes Trum (24,25) des zum Einziehen des Fadengeleges (2) gebildeten Seiltriebes. i) Nach dem Abnehmen der Fadenstränge (8) von den Radscheiben (12,13) wird die Stauchung der Längenabschnitte (3,4) aufgehoben und die Längenabschnitte (3,4) werden endseitig zur Bildung eines umlaufenden, nunmehr aber zweiteiligen Schutzschlauches (5) miteinander verbunden, insbesondere miteinander vernäht. 1. Method of making a round sling that consists of
- A scrim (2) as a load-bearing core and
- A protective tube (5) surrounding the scrim (2) made of a textile tube fabric with two fabric layers between the marginal edges.
This process with the following manufacturing steps: a) The prefabricated protective tube (5) is kept compressed in its length. b) A thread strand (8), for example a textile yarn, is passed through the compressed protective tube (5) in its longitudinal direction. c) The thread strand (8) is then placed in the manner of the rope of an endless rope drive with its areas protruding on both sides from the compressed protective tube (5) over the circumference of a wheel disk (12, 13). d) To close the rope drive according to c), the thread strand (8) is connected to the thread strand region which has not yet been pulled through the protective tube (5) (node 23) such that the compressed protective tube (5) is one of the two strands (24, 25) of the rope strand around the wheel disks (12, 13) placed around the thread strand (8). e) A wheel disc (12) is driven to revolve the rope drive formed in such a way that the thread strand area which has not yet been pulled through the protective tube (5) is continuously tightened and thus the compressed protection in a plurality of individual strands (8) hose (5) penetrates. f) After removing the desired number of thread strands (8) from the wheel disks (12, 13), the compression of the protective tube (5) is released and the ends of the protective tube (5) are connected to one another in such a way that it now forms the scrim (2) surrounds at least its entire circumferential length
featured
due to the following features: g) The thread strand (8) is passed in succession analogously to production step b) through two individual, compressed sections of length (3, 4) of the protective tube (5) in the longitudinal direction. h) After the cable drive has been closed analogously to production step d), each length section (3, 4) of the protective tube (5) surrounds a different strand (24, 25) of the cable drive formed to pull in the laid scrim (2). i) After the thread strands (8) have been removed from the wheel disks (12, 13), the compression of the length sections (3, 4) is released and the length sections (3, 4) become ends at the ends to form a circumferential, but now two-part protective tube (5 ) connected to each other, especially sewn together. 2. Rundschlinge nach Anspruch 1 aus
- einem Fadengelege (2) als tragender Kern und
- einem das Fadengelege (2) umgebenden Schutzschlauch (5) aus einem textilen Schlauchgewebe mit zwischen dessen Randkanten zwei Gewebelagen,
      dadurch gekennzeichnet,
daß ihr Schutzschlauch (5) aus zwei Längenabschnitten (3,4) besteht, die endseitig miteinander verbunden, insbesondere miteinander vernäht sind und daß das Schlauchgewebe von einer solchen Wandstärke, Konsistenz und/oder von einer solchen Breite ist, daß in einem auf weniger als etwa 50% seiner Ausgangslänge gestauchten Zustand wegen eines zu geringen lichten Innenquerschnittes das Einziehen des Fadengeleges (2) nicht mehr möglich wäre.2. Round sling according to claim 1
- A scrim (2) as a load-bearing core and
- a protective tube (5) surrounding the scrim (2) made of a textile tube fabric with two fabric layers between its edge edges,
characterized,
that its protective tube (5) consists of two longitudinal sections (3, 4) which are connected at the ends, in particular sewn together, and that the tube fabric is of such a wall thickness, consistency and / or of such a width that in one less than about 50% of its initial length, compressed condition, because the internal cross section was too small, it would no longer be possible to pull in the scrim (2). 3. Rundschlinge nach Anspruch 2,
      dadurch gekennzeichnet,
daß die Längenabschnitte (3,4) etwa gleichlang sind.3. round sling according to claim 2,
characterized,
that the longitudinal sections (3,4) are approximately the same length. 4. Rundschlinge nach Anspruch 2 oder 3,
      dadurch gekennzeichnet,
daß das Schlauchgewebe durch Beigabe verschleißfester Fäden, z.B. Metallfäden, oder durch eine Beschich­tungsauflage verstärkt ist.4. round sling according to claim 2 or 3,
characterized,
that the tubular fabric is reinforced by adding wear-resistant threads, for example metal threads, or by a coating layer.
EP88101315A 1987-02-06 1988-01-29 Method for making an endless sling Expired - Lifetime EP0279252B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88101315T ATE58565T1 (en) 1987-02-06 1988-01-29 PROCEDURE FOR MAKING A ROUND SLING.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873703547 DE3703547A1 (en) 1987-02-06 1987-02-06 METHOD FOR PRODUCING A ROUND Sling
DE3703547 1987-02-06

Publications (2)

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EP0279252A1 true EP0279252A1 (en) 1988-08-24
EP0279252B1 EP0279252B1 (en) 1990-11-22

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US (1) US4843807A (en)
EP (1) EP0279252B1 (en)
JP (1) JPS63256783A (en)
AT (1) ATE58565T1 (en)
AU (1) AU594285B2 (en)
CA (1) CA1309243C (en)
DE (2) DE3703547A1 (en)
DK (1) DK166221C (en)
ES (1) ES2019975B3 (en)
FI (1) FI84375C (en)
NO (1) NO169854C (en)

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DE102011055454B4 (en) * 2011-11-17 2016-11-10 Westdeutscher Drahtseil-Verkauf Dolezych Gmbh & Co. Method and device for producing a round sling

Also Published As

Publication number Publication date
NO169854B (en) 1992-05-04
AU1133388A (en) 1988-08-11
JPH0351836B2 (en) 1991-08-08
EP0279252B1 (en) 1990-11-22
DK61088D0 (en) 1988-02-05
DE3861097D1 (en) 1991-01-03
US4843807A (en) 1989-07-04
NO880439D0 (en) 1988-02-02
AU594285B2 (en) 1990-03-01
ATE58565T1 (en) 1990-12-15
CA1309243C (en) 1992-10-27
FI880493A0 (en) 1988-02-03
FI84375C (en) 1991-11-25
DK166221C (en) 1993-08-16
DK166221B (en) 1993-03-22
JPS63256783A (en) 1988-10-24
NO169854C (en) 1992-08-12
ES2019975B3 (en) 1991-07-16
NO880439L (en) 1988-08-08
FI84375B (en) 1991-08-15
DE3703547A1 (en) 1988-08-18
DK61088A (en) 1988-08-07
FI880493A (en) 1988-08-07

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