EP2431520B1 - Screw-in dowel for rail fixings - Google Patents

Screw-in dowel for rail fixings Download PDF

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Publication number
EP2431520B1
EP2431520B1 EP10177840.5A EP10177840A EP2431520B1 EP 2431520 B1 EP2431520 B1 EP 2431520B1 EP 10177840 A EP10177840 A EP 10177840A EP 2431520 B1 EP2431520 B1 EP 2431520B1
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EP
European Patent Office
Prior art keywords
cylindrical ring
screw
screw anchor
plastic
anchor according
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.)
Active
Application number
EP10177840.5A
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German (de)
French (fr)
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EP2431520A1 (en
Inventor
Winfried BÖSTERLING
Michael Harrass
Dierk Bressel
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.)
Vossloh Werke GmbH
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Vossloh Werke GmbH
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.)
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Publication date
Priority to EP10177840.5A priority Critical patent/EP2431520B1/en
Application filed by Vossloh Werke GmbH filed Critical Vossloh Werke GmbH
Priority to ES10177840.5T priority patent/ES2544261T3/en
Priority to PL10177840T priority patent/PL2431520T3/en
Priority to US13/825,147 priority patent/US20130228634A1/en
Priority to EA201390416A priority patent/EA201390416A1/en
Priority to EP11757895.5A priority patent/EP2619368A1/en
Priority to CN2011800559265A priority patent/CN103314157A/en
Priority to ARP110103439A priority patent/AR083067A1/en
Priority to PCT/EP2011/066399 priority patent/WO2012038464A1/en
Publication of EP2431520A1 publication Critical patent/EP2431520A1/en
Application granted granted Critical
Publication of EP2431520B1 publication Critical patent/EP2431520B1/en
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B9/00—Fastening rails on sleepers, or the like
    • E01B9/02—Fastening rails, tie-plates, or chairs directly on sleepers or foundations; Means therefor
    • E01B9/04—Fastening on wooden or concrete sleepers or on masonry without clamp members
    • E01B9/14—Plugs, sleeves, thread linings, or other inserts for holes in sleepers
    • E01B9/18—Plugs, sleeves, thread linings, or other inserts for holes in sleepers for concrete sleepers

Definitions

  • the invention relates to a screw plug for setting in concrete in a railway sleeper or slab track according to the preamble of claim 1. Furthermore, the invention relates to a railway sleeper or slab track with at least one screw according to the invention.
  • Screw anchors for setting in concrete in a railway sleeper are used in railway construction to connect rail and sleeper.
  • the rail fastening is connected to the threshold via sleeper screws.
  • the screw anchors are often made of plastic and can be poured in the production of a concrete sleeper or a slab track in this.
  • One reason that the dowels are often made of plastic is that the sleeper should be electrically insulated from the threshold and that plastic is a cheap, easy-to-process and use flexible material.
  • a disadvantage that arises in this case is that the plastic screw plugs often have different mechanical and physical properties than the material surrounding them.
  • many plastics, and also the materials commonly used as dowel material have a coefficient of thermal expansion about 10 times greater than concrete. This can lead to disadvantages especially in concrete sleeper production, but also in later operation, as one with the concrete initially positively in contact dowel expands more when the temperature increases than the surrounding concrete, so that pressure is exerted on the concrete. At high thermal stresses, cracks and gaps around the dowel or radially may occur in the concrete.
  • the GB 961 876 A discloses features falling within the preamble of claim 1.
  • the GB 961 877 A and the DE 36 22 860 A1 form further state of the art.
  • the invention has for its object to develop a dowel for setting in concrete in a railway sleeper or slab track, which is characterized by a reduced stress build-up in the surrounding concrete material.
  • the screw according to the invention for the concreting in a slab track or railway sleeper is characterized by the fact that it has a threaded portion with externally arranged on the screw dowel external threads and inside arranged in the screw dowel internal threads and further comprises a located in the installed state near the dowel opening upper portion without external thread. It is further characterized by the fact that it comprises two components of different materials, namely one Plastic body and a cylindrical ring made of a steel material, which is attached to the base body in a positive and / or non-positive fit.
  • the screw anchor according to the invention has the advantage that due to the cylindrical ring made of a steel material by the expansion of the plastic resulting voltages are intercepted by this ring and thus can not spread into the concrete material. This ensures that fewer and smaller cracks occur in the concrete material and thus the concrete sleeper reaches a longer service life. As a result, the advantageous properties of two materials in a hard / soft combination are used.
  • Such a dowel can be prepared by inserting the cylindrical ring as an insert into an injection mold, which can take place automatically, whereby plastic material can be injected in such a way that the ring surrounds the dowel from the outside.
  • a further preferred embodiment is that the cylindrical ring with the main body in the installed position at the top extends into the region of an insertion opening for a sleeper screw, but there is preferably covered with a plastic collar as part of the anchor.
  • the plastic collar should cover the cross section of the cylindrical ring and have a thickness of 3 to 5 mm. This ensures that there is sufficient electrical insulation between the sleeper screw and the cylindrical ring, and also counteracts the corrosion of the steel. This has the advantage that the strongest temperature fluctuations that occur at the surface of the railway sleeper or slab track, are best intercepted by such a positioned ring.
  • the ring is attached by a corresponding adjustment of the inner diameter positive and / or non-positively connected to the main body of the anchor.
  • the ring has a wall thickness between 0.5 mm and 5 mm. This has the advantage that the ring is thick enough to absorb the expansion of the plastic material while at the same time being thin enough to be cost and material efficient.
  • the ring extends in the installed position down to the upper beginning of the external threads.
  • the advantage here is that the ring can enclose as much material as possible and thus prevent the expansion of as much plastic material as possible and thus crack formation, while at the same time saving steel, since the ring is present only in the (upper) region in which the strongest temperature differences occur.
  • the lower plastic area with the outer threads serves to fix the screw in the concrete.
  • the thermal expansion coefficient of the steel material of the cylindrical ring is at least 10 times smaller than that of the plastic material of the base body, which it surrounds. This has the advantage that the steel ring expands only slightly relative to the plastic with temperature fluctuations and therefore the ring can fulfill its function, namely to prevent the expansion of the plastic material even at high temperatures, to a particular extent.
  • the linear thermal expansion coefficient of the material of the cylindrical ring is less than 3 ⁇ 10 -5 L / K.
  • a further preferred embodiment is that the thermal expansion coefficient of the steel material corresponds approximately to that of the concrete of the threshold. This has an advantageous effect that then concrete and steel are very similar in terms of their thermal expansion coefficient and thus no tensions between these two materials in temperature fluctuations.
  • a screw plug is preferred in which the steel material is characterized by such a large modulus of elasticity and hardness that the attached to the dowel cylindrical ring when heated within the temperature range that occurs during normal use, not or only slightly of expand the expanding plastic of the body. This high strength of the steel thus compressive stresses between dowels and surrounding concrete are prevented.
  • the modulus of elasticity of the material of the cylindrical ring is at most 150 GPa.
  • the screw plug is characterized in that its external thread is a round thread.
  • a thread is advantageously characterized by easy manufacturability and high strength of the resulting connection with the concrete.
  • a round thread has proven to be very favorable in terms of traction at radial stresses between screw and concrete material.
  • the screw plug is characterized in that the cylindrical ring is thinly coated with plastic.
  • the steel material of the cylindrical ring is protected from external influences (eg rain) and thus corrosion, which has an advantageous effect on the long-term life of the ring.
  • it is not visible from the outside.
  • the dowel and the screw possibly contained therein are electrically insulated from the surrounding concrete, which is advantageous for sleepers to be used on electrified tracks.
  • the said sheath can be achieved by injection molding in a simple manner by injection molding.
  • a further preferred embodiment of the invention is that a railway sleeper or slab track is provided with at least one screw plug according to one of the preceding embodiments. This has the advantage that the railway sleeper is characterized by an increased service life due to the advantages already mentioned.
  • FIG. 1 illustrated erdübel 10 consists of the base body 22 made of plastic material and is divided into an upper portion 16 without external thread, a central portion 14 with externally arranged on the screw dowel 10 external threads 18 and internally in the screw dowel arranged internal threads 28 and a lower portion 12.
  • the internal thread can also be designed as a round thread, but it may be in terms of the thread pitch and thread pitch of the external thread 18 differ.
  • the upper portion 16 is substantially cylindrical in shape and formed integrally with the threaded portion 14 as well as the lower portion 12.
  • form-fitting elements may be provided in the form of extending in the longitudinal direction of the screw dowel ribs, which prevents or at least complicates after turning the screw with the concrete mass of a railway sleeper or slab track radial twisting of the screw anchor relative to the surrounding concrete material.
  • the in FIG. 1 illustrated erdübel is provided with a cylindrical ring 20 made of a steel material which extends along the upper portion 16 and flush with the upper opening 26. It consists of steel, although it can also consist of another material, which is characterized by a high modulus of elasticity and a coefficient of thermal expansion, which corresponds approximately to that of concrete.
  • the cylindrical ring 20 is connected to the base body 22 of the screw plug by the upper portion 16 of the base body 22 is injected into the cylindrical ring 20.
  • the screw plug is thus made by the cylindrical ring is inserted into the mold and then the plastic material of the body 22 according to the in FIG. 1 molded molding is injected.
  • the cylindrical ring has a wall thickness between 0.5 mm and 5 mm, so that sufficient strength is ensured at low material usage to absorb the expansion of the plastic material.
  • FIG. 1 closes the installation position shown in the figure with a substantially vertical orientation of the longitudinal axis of the screw plug of the cylindrical ring 20 at the top flush with the upper portion 16 of the body.
  • the plastic collar has a thickness of 3 mm to 5 mm.
  • the function of a plastic collar over the cylindrical ring is to provide sufficient electrical insulation between a tie screw threaded into the anchor and the cylindrical ring. Furthermore, the plastic collar counteracts the corrosion of the ring.
  • FIG. 2 The embodiment illustrated corresponds essentially to that according to FIG. 1 Therefore, the reference numerals of this figure are adopted here, but differs by an additional coating of the steel ring in the form of plastic collar 24. This coating is carried out on the outer circumference of the entire steel ring and prevents the steel ring comes into direct contact with the environment and thus corroded or produces an undesirable electrical contact of a screw screwed into the dowel with the threshold or slab track.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Connection Of Plates (AREA)
  • Bolts, Nuts, And Washers (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Road Paving Structures (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Description

Gebiet der ErfindungField of the invention

Die Erfindung betrifft einen Schraubdübel für das Einbetonieren in eine Eisenbahnschwelle oder Feste Fahrbahn gemäß dem Oberbegriff des Anspruchs 1. Weiterhin betrifft die Erfindung eine Eisenbahnschwelle oder Feste Fahrbahn mit mindestens einem erfindungsgemäßen Schraubdübel.The invention relates to a screw plug for setting in concrete in a railway sleeper or slab track according to the preamble of claim 1. Furthermore, the invention relates to a railway sleeper or slab track with at least one screw according to the invention.

Stand der Technik und ProblemstellungState of the art and problem definition

Schraubdübel für das Einbetonieren in eine Eisenbahnschwelle dienen beim Eisenbahnbau zur Verbindung von Schiene und Schwelle. Dabei wird die Schienenbefestigung über Schwellenschrauben mit der Schwelle verbunden. Die Schraubdübel bestehen häufig aus Kunststoff und können bei der Herstellung einer Betonschwelle oder einer Festen Fahrbahn in diese eingegossen werden. Ein Grund dafür, dass die Dübel oft aus Kunststoff bestehen, liegt darin, dass eine elektrische Isolierung der Schwellenschraube gegenüber der Schwelle erfolgen soll und dass Kunststoff ein billiges und einfach zu verarbeitendes und zu benutzendes flexibles Material ist.Screw anchors for setting in concrete in a railway sleeper are used in railway construction to connect rail and sleeper. The rail fastening is connected to the threshold via sleeper screws. The screw anchors are often made of plastic and can be poured in the production of a concrete sleeper or a slab track in this. One reason that the dowels are often made of plastic is that the sleeper should be electrically insulated from the threshold and that plastic is a cheap, easy-to-process and use flexible material.

Ein Nachteil, der sich hierbei ergibt, besteht darin, dass die Schraubdübel aus Kunststoff oftmals andere mechanische und physikalische Eigenschaften haben als das sie umgebende Material. Im Fall des Wärmeausdehnungskoeffizienten haben viele Kunststoffe, und auch die üblicherweise als Dübelmaterial verwendeten Werkstoffe, einen etwa 10-fach größeren Wärmeausdehnungskoeffizienten als Beton. Dies kann insbesondere bei der Betonschwellenfertigung, aber auch im späteren Betrieb zu Nachteilen führen, da ein mit dem Beton zunächst formschlüssig in Kontakt stehender Dübel sich bei Temperaturerhöhung stärker ausdehnt als der umgebende Beton, so dass Druck auf den Beton ausgeübt wird. Bei hohen thermischen Spannungen können im Beton Risse und Spalten um den Dübel herum oder radial entstehen. Abhängig vom Schienenbefestigungssystem bzw. dem verwendeten spezifischen Spannsystem (z.B. Spannklemme) werden Kräfte in die Betonschwelle eingeleitet, wodurch Querzugspannungen entstehen, die eine Rissausweitung verursachen und nachfolgendes Risswachstum begünstigen können. Dadurch kann Wasser und/oder Schmutz in den Beton eindringen, und infolge dessen können durch anwachsende Risse weitere Schädigungen der Schwelle entstehen, was sich negativ auf die Lebensdauer der Schwelle auswirkt.A disadvantage that arises in this case is that the plastic screw plugs often have different mechanical and physical properties than the material surrounding them. In the case of the coefficient of thermal expansion, many plastics, and also the materials commonly used as dowel material, have a coefficient of thermal expansion about 10 times greater than concrete. This can lead to disadvantages especially in concrete sleeper production, but also in later operation, as one with the concrete initially positively in contact dowel expands more when the temperature increases than the surrounding concrete, so that pressure is exerted on the concrete. At high thermal stresses, cracks and gaps around the dowel or radially may occur in the concrete. Depending on the rail fastening system or the specific clamping system used (eg tension clamp), forces are introduced into the concrete sleeper, resulting in transverse tensile stresses, which can cause crack propagation and subsequent crack growth. As a result, water and / or dirt can penetrate into the concrete, and as a result of increasing cracks further damage to the threshold arise, which has a negative effect on the life of the threshold.

Die GB 961 876 A offenbart Merkmale, die unter den Oberbegriff von Anspruch 1 fallen. Die GB 961 877 A und die DE 36 22 860 A1 bilden weiteren Stand der Technik.The GB 961 876 A discloses features falling within the preamble of claim 1. The GB 961 877 A and the DE 36 22 860 A1 form further state of the art.

Darstellung der ErfindungPresentation of the invention

Der Erfindung liegt die Aufgabe zugrunde, einen Dübel zum Einbetonieren in eine Eisenbahnschwelle oder Feste Fahrbahn zu entwickeln, welcher sich durch einen verringerten Spannungsaufbau im umgebenden Betonmaterial auszeichnet.The invention has for its object to develop a dowel for setting in concrete in a railway sleeper or slab track, which is characterized by a reduced stress build-up in the surrounding concrete material.

Die Lösung dieser Aufgabe erfolgt zum einen durch den in Anspruch 1 beschriebenen Schraubdübel. Eine weitere Lösung der Aufgabe wird durch die in Anspruch 10 beschriebene Eisenbahnschwelle oder Feste Fahrbahn erzielt, welche mindestens einen erfindungsgemäßen Dübel aufweist.The solution to this problem is done firstly by the screw anchor described in claim 1. A further solution of the problem is achieved by the railway sleeper or slab track described in claim 10, which has at least one dowel according to the invention.

Der erfindungsgemäße Schraubdübel für das Einbetonieren in eine Feste Fahrbahn oder Eisenbahnschwelle zeichnet sich dadurch aus, dass er einen Gewindeabschnitt mit außen am Schraubdübel angeordneten Außengewindegängen sowie innen im Schraubdübel angeordneten Innengewindegängen aufweist und ferner einen im Einbauzustand nahe der Dübelöffnung gelegenen oberen Teilabschnitt ohne Außengewinde aufweist. Er zeichnet sich ferner dadurch aus, dass er zwei Bestandteile aus unterschiedlichen Materialien aufweist, nämlich einen Grundkörper aus Kunststoff und einen zylindrischen Ring aus einem Stahlwerkstoff, der form- und/oder kraftschlüssig am Grundkörper angebracht ist.The screw according to the invention for the concreting in a slab track or railway sleeper is characterized by the fact that it has a threaded portion with externally arranged on the screw dowel external threads and inside arranged in the screw dowel internal threads and further comprises a located in the installed state near the dowel opening upper portion without external thread. It is further characterized by the fact that it comprises two components of different materials, namely one Plastic body and a cylindrical ring made of a steel material, which is attached to the base body in a positive and / or non-positive fit.

Der erfindungsgemäße Schraubdübel hat den Vorteil, dass aufgrund des zylindrischen Rings aus einem Stahlwerkstoff durch die Ausdehnung des Kunststoffs entstehende Spannungen von diesem Ring abgefangen werden und sich somit nicht in das Betonmaterial ausbreiten können. Dadurch wird erreicht, dass weniger und kleinere Risse im Betonmaterial auftreten und die Betonschwelle somit eine höhere Lebensdauer erreicht. Hierdurch werden die vorteilhaften Eigenschaften zweier Materialien in einer Hart-/Weichkombination zur Anwendung gebracht.The screw anchor according to the invention has the advantage that due to the cylindrical ring made of a steel material by the expansion of the plastic resulting voltages are intercepted by this ring and thus can not spread into the concrete material. This ensures that fewer and smaller cracks occur in the concrete material and thus the concrete sleeper reaches a longer service life. As a result, the advantageous properties of two materials in a hard / soft combination are used.

Ein solcher Dübel kann sich dadurch herstellen lassen, dass der zylindrische Ring als Einlegeteil in ein Spritzgießwerkzeug eingelegt wird, was automatisiert stattfinden kann, wodurch Kunststoffmaterial derart gespritzt werden kann, dass der Ring den Dübel von außen umgibt.Such a dowel can be prepared by inserting the cylindrical ring as an insert into an injection mold, which can take place automatically, whereby plastic material can be injected in such a way that the ring surrounds the dowel from the outside.

Eine weitere bevorzugte Ausführungsform besteht darin, dass der zylindrische Ring mit dem Grundkörper in Einbauposition oben bis in den Bereich einer Einführöffnung für eine Schwellenschraube reicht, dort aber vorzugsweise mit einem Kunststoffkragen als Bestandteil des Dübels überdeckt wird. Der Kunststoffkragen soll den Querschnitt des zylindrischen Rings überdecken und eine Dicke von 3 bis 5 mm aufweisen. Dadurch wird gewährleistet, dass eine hinreichende elektrische Isolation zwischen Schwellenschraube und zylindrischem Ring besteht und zudem der Korrosion des Stahls entgegen gewirkt werden. Dies hat den Vorteil, dass die stärksten Temperaturschwankungen, welche an der Oberfläche der Eisenbahnschwelle oder Festen Fahrbahn auftreten, durch einen derartig positionierten Ring am besten abgefangen werden.A further preferred embodiment is that the cylindrical ring with the main body in the installed position at the top extends into the region of an insertion opening for a sleeper screw, but there is preferably covered with a plastic collar as part of the anchor. The plastic collar should cover the cross section of the cylindrical ring and have a thickness of 3 to 5 mm. This ensures that there is sufficient electrical insulation between the sleeper screw and the cylindrical ring, and also counteracts the corrosion of the steel. This has the advantage that the strongest temperature fluctuations that occur at the surface of the railway sleeper or slab track, are best intercepted by such a positioned ring.

Ferner wird bevorzugt, dass der Ring durch eine entsprechende Anpassung des Innendurchmessers form- und/oder kraftschlüssig an dem Grundkörper des Dübels angebracht ist. Hierdurch werden Klebe-, Verhakungs- und andere Befestigungen vermieden, was zu einer vereinfachten Produktionsweise und reduzierten Kosten führt.Furthermore, it is preferred that the ring is attached by a corresponding adjustment of the inner diameter positive and / or non-positively connected to the main body of the anchor. As a result, adhesive, Verhakungs and other fasteners are avoided, resulting in a simplified production and reduced costs.

Eine weitere bevorzugte Ausführung besteht darin, dass der Ring eine Wandstärke zwischen 0,5 mm und 5 mm aufweist. Dies hat den Vorteil, dass der Ring dick genug ist, um die Ausdehnung des Kunststoffmaterials aufzufangen, während er gleichzeitig dünn genug ist, um kosten- und materialeffizient zu sein.Another preferred embodiment is that the ring has a wall thickness between 0.5 mm and 5 mm. This has the advantage that the ring is thick enough to absorb the expansion of the plastic material while at the same time being thin enough to be cost and material efficient.

Weiterhin wird bevorzugt, dass sich der Ring in der Einbauposition nach unten bis zum oberen Beginn der Außengewindegänge erstreckt. Hierbei ist der Vorteil, dass der Ring möglichst viel Material umschließen kann und somit die Ausdehnung von möglichst viel Kunststoffmaterial und damit auch die Rissbildung verhindert, während gleichzeitig Stahl gespart wird, da der Ring nur in dem (oberen) Bereich vorhanden ist, in welchem die stärksten Temperaturunterschiede auftreten. Der untere Kunststoffbereich mit den äußeren Gewindegängen dient dazu, um den Schraubdübel im Beton zu fixieren.Furthermore, it is preferred that the ring extends in the installed position down to the upper beginning of the external threads. The advantage here is that the ring can enclose as much material as possible and thus prevent the expansion of as much plastic material as possible and thus crack formation, while at the same time saving steel, since the ring is present only in the (upper) region in which the strongest temperature differences occur. The lower plastic area with the outer threads serves to fix the screw in the concrete.

Erfindungsgemäß ist der Wärmeausdehnungskoeffizient des Stahlwerkstoffs des zylindrischen Rings mindestens 10-mal kleiner als derjenige des Kunststoffmaterials des Grundkörpers, welchen er umgibt. Dies hat den Vorteil, dass sich der Stahlring relativ zum Kunststoff bei Temperaturschwankungen nur wenig ausdehnt und der Ring daher seine Funktion, nämlich die Expansion des Kunststoffmaterials auch bei hohen Temperaturen zu verhindern, in besonderem Maße erfüllen kann. Hierbei ist der lineare Wärmeausdehnungskoeffizient des Werkstoffes des zylindrischen Rings geringer als 3·10-5 l/K.According to the invention, the thermal expansion coefficient of the steel material of the cylindrical ring is at least 10 times smaller than that of the plastic material of the base body, which it surrounds. This has the advantage that the steel ring expands only slightly relative to the plastic with temperature fluctuations and therefore the ring can fulfill its function, namely to prevent the expansion of the plastic material even at high temperatures, to a particular extent. Here, the linear thermal expansion coefficient of the material of the cylindrical ring is less than 3 × 10 -5 L / K.

Eine weitere bevorzugte Ausführungsform besteht darin, dass der Wärmeausdehnungskoeffizient des Stahlwerkstoffs in etwa demjenigen des Betons der Schwelle entspricht. Hierbei wirkt sich vorteilhaft aus, dass sich dann Beton und Stahl bezüglich ihres Wärmeausdehnungskoeffizientens sehr ähnlich sind und somit zwischen diesen beiden Materialien bei Temperaturschwankungen keine Spannungen auftreten.A further preferred embodiment is that the thermal expansion coefficient of the steel material corresponds approximately to that of the concrete of the threshold. This has an advantageous effect that then concrete and steel are very similar in terms of their thermal expansion coefficient and thus no tensions between these two materials in temperature fluctuations.

Weiterhin wird ein Schraubdübel bevorzugt, bei dem sich der Stahlwerkstoff durch ein so großes Elastizitätsmodul und eine so große Härte auszeichnet, dass sich der an dem Dübel angebrachte zylindrische Ring bei Erwärmung innerhalb des Temperaturbereichs, der bei dem bestimmungsgemäßen Gebrauch auftritt, nicht oder nur geringfügig von dem expandierenden Kunststoff des Grundkörpers ausdehnen lässt. Durch diese hohe Festigkeit des Stahls werden somit Druckspannungen zwischen Dübel und umgebendem Beton verhindert. Das Elastizitätsmodul des Werkstoffs des zylindrischen Rings beträgt maximal 150 GPa.Furthermore, a screw plug is preferred in which the steel material is characterized by such a large modulus of elasticity and hardness that the attached to the dowel cylindrical ring when heated within the temperature range that occurs during normal use, not or only slightly of expand the expanding plastic of the body. This high strength of the steel thus compressive stresses between dowels and surrounding concrete are prevented. The modulus of elasticity of the material of the cylindrical ring is at most 150 GPa.

Vorteilhafterweise zeichnet sich der Schraubdübel dadurch aus, dass sein Außengewinde ein Rundgewinde ist. Ein solches Gewinde weist sich vorteilhaft durch eine leichte Herstellbarkeit und eine hohe Festigkeit der dadurch entstehenden Verbindung mit dem Beton aus. Darüber hinaus hat sich ein Rundgewinde als sehr günstig in Bezug auf den Kraftschluss bei Radialspannungen zwischen Schraubdübel und Betonmaterial erwiesen.Advantageously, the screw plug is characterized in that its external thread is a round thread. Such a thread is advantageously characterized by easy manufacturability and high strength of the resulting connection with the concrete. In addition, a round thread has proven to be very favorable in terms of traction at radial stresses between screw and concrete material.

Ferner wird bevorzugt, dass der Schraubdübel sich dadurch auszeichnet, dass der zylindrische Ring dünn mit Kunststoff beschichtet ist. Hierbei wird das Stahlmaterial des zylindrischen Rings vor äußeren Einflüssen (z.B. Regen) und somit Korrosion geschützt, was sich auf die langfristige Lebensdauer des Rings vorteilhaft auswirkt. Außerdem ist er von außen nicht sichtbar. Ferner wird dadurch außerdem dadurch gesorgt, dass der Dübel und die darin eventuell enthaltene Schraube von dem umgebenden Beton elektrisch isoliert werden, was für Schwellen, welche auf elektrifizierten Trassen benutzt werden sollen, vorteilhaft ist. Die besagte Ummantelung lässt sich auf einfache Art und Weise im Spritzgussverfahren durch Umspritzen erreichen.Furthermore, it is preferred that the screw plug is characterized in that the cylindrical ring is thinly coated with plastic. Here, the steel material of the cylindrical ring is protected from external influences (eg rain) and thus corrosion, which has an advantageous effect on the long-term life of the ring. In addition, it is not visible from the outside. Furthermore, it will also do so ensured by the fact that the dowel and the screw possibly contained therein are electrically insulated from the surrounding concrete, which is advantageous for sleepers to be used on electrified tracks. The said sheath can be achieved by injection molding in a simple manner by injection molding.

Eine weitere bevorzugte Ausführungsform der Erfindung besteht darin, dass eine Eisenbahnschwelle oder Feste Fahrbahn mit mindestens einem Schraubdübel nach einer der vorhergehenden Ausführungsformen versehen ist. Dies hat den Vorteil, dass sich die Eisenbahnschwelle aufgrund der bereits vorher genannten Vorteile durch eine erhöhte Lebensdauer auszeichnet.A further preferred embodiment of the invention is that a railway sleeper or slab track is provided with at least one screw plug according to one of the preceding embodiments. This has the advantage that the railway sleeper is characterized by an increased service life due to the advantages already mentioned.

Kurze Beschreibung der FigurenBrief description of the figures

Nachfolgend wird die Erfindung rein beispielhaft anhand der beiliegenden Figuren beschrieben, in denen

Figur 1
einen Querschnitt einer ersten Ausführungsform eines erfindungsgemäßen Schraubdübels zeigt; und
Figur 2
eine zweite Ausführungsform eines erfindungsgemäßen Schraubdübels zeigt.
The invention will be described purely by way of example with reference to the accompanying drawings, in which
FIG. 1
shows a cross section of a first embodiment of a screw according to the invention dowel; and
FIG. 2
shows a second embodiment of a screw according to the invention.

Wege zur Ausführung der ErfindungWays to carry out the invention

Der in Figur 1 dargestellte Schraubdübel 10 besteht aus dem Grundkörper 22 aus Kunststoffmaterial und gliedert sich in einen oberen Teilabschnitt 16 ohne Außengewinde, einen mittleren Teilabschnitt 14 mit außen am Schraubdübel 10 angeordneten Außengewindegängen 18 sowie innen im Schraubdübel angeordneten Innengewindegängen 28 und einen unteren Teilabschnitt 12. Das Innengewinde kann ebenfalls als Rundgewinde ausgeführt sein, es kann sich jedoch im Bezug auf die Gewindesteigung sowie Gewindeteilung von dem Außengewinde 18 unterscheiden.The in FIG. 1 illustrated Schraubdübel 10 consists of the base body 22 made of plastic material and is divided into an upper portion 16 without external thread, a central portion 14 with externally arranged on the screw dowel 10 external threads 18 and internally in the screw dowel arranged internal threads 28 and a lower portion 12. The internal thread can also be designed as a round thread, but it may be in terms of the thread pitch and thread pitch of the external thread 18 differ.

Der obere Teilabschnitt 16 ist im Wesentlichen zylinderförmig ausgeführt und einstückig mit dem Gewindeabschnitt 14 wie auch dem unteren Teilabschnitt 12 ausgebildet. Am Außenumfang des unteren Teilabschnitts 12 können Formschlusselemente in Form von in Längsrichtung des Schraubdübels verlaufenden Rippen vorgesehen sein, welche nach dem Umgießen des Schraubdübels mit der Betonmasse einer Eisenbahnschwelle oder Festen Fahrbahn ein radiales Verdrehen des Schraubdübels relativ zu dem umgebenden Betonmaterial verhindert oder zumindest erschwert.The upper portion 16 is substantially cylindrical in shape and formed integrally with the threaded portion 14 as well as the lower portion 12. On the outer periphery of the lower portion 12 form-fitting elements may be provided in the form of extending in the longitudinal direction of the screw dowel ribs, which prevents or at least complicates after turning the screw with the concrete mass of a railway sleeper or slab track radial twisting of the screw anchor relative to the surrounding concrete material.

Der in Figur 1 dargestellte Schraubdübel ist mit einem zylindrischen Ring 20 aus einem Stahlwerkstoff versehen, welcher sich entlang des oberen Teilabschnitts 16 erstreckt und mit der oberen Öffnung 26 bündig abschließt. Er besteht aus Stahl, wobei er allerdings auch aus einem anderen Werkstoff bestehen kann, welcher sich durch ein hohes Elastizitätsmodul und einen Wärmeausdehnungskoeffizienten auszeichnet, welcher in etwa dem von Beton entspricht. Der zylindrische Ring 20 ist mit dem Grundkörper 22 des Schraubdübels verbunden, indem der obere Teilabschnitt 16 des Grundkörpers 22 in den zylindrischen Ring 20 eingespritzt ist. Der Schraubdübel wird somit gefertigt, indem der zylindrische Ring in die Spritzform eingesetzt wird und anschließend das Kunststoffmaterial des Grundkörpers 22 entsprechend der in Figur 1 dargestellten Formgebung gespritzt wird. Der zylindrische Ring besitzt dabei eine Wandstärke zwischen 0,5 mm und 5 mm, so dass bei geringem Materialeinsatz eine ausreichende Festigkeit gewährleistet ist, um die Ausdehnung des Kunststoffmaterials aufzufangen.The in FIG. 1 illustrated Schraubdübel is provided with a cylindrical ring 20 made of a steel material which extends along the upper portion 16 and flush with the upper opening 26. It consists of steel, although it can also consist of another material, which is characterized by a high modulus of elasticity and a coefficient of thermal expansion, which corresponds approximately to that of concrete. The cylindrical ring 20 is connected to the base body 22 of the screw plug by the upper portion 16 of the base body 22 is injected into the cylindrical ring 20. The screw plug is thus made by the cylindrical ring is inserted into the mold and then the plastic material of the body 22 according to the in FIG. 1 molded molding is injected. The cylindrical ring has a wall thickness between 0.5 mm and 5 mm, so that sufficient strength is ensured at low material usage to absorb the expansion of the plastic material.

Wie aus Figur 1 ersichtlich ist, schließt der in der Figur dargestellten Einbauposition mit einer im Wesentlichen senkrechten Ausrichtung der Längsachse des Schraubdübels der zylindrische Ring 20 oben bündig mit dem oberen Teilabschnitt 16 des Grundkörpers ab.How out FIG. 1 it can be seen, closes the installation position shown in the figure with a substantially vertical orientation of the longitudinal axis of the screw plug of the cylindrical ring 20 at the top flush with the upper portion 16 of the body.

Allgemein soll der zylindrische Ring 20 mit dem Grundkörper 22 bis in den Bereich der Einführöffnung reichen, dort aber von einem isolierenden Kunststoffkragen 24 als Bestandteil des Dübels überdeckt werden. Der Kunststoffkragen weist eine Dicke von 3 mm bis 5 mm auf. Die Funktion eines Kunststoffkragens über dem zylindrischen Ring besteht darin, eine hinreichende elektrische Isolation zwischen einer in dem Dübel eingedrehten Schwellenschraube und dem zylindrischen Ring herzustellen. Weiterhin wirkt der Kunststoffkragen der Korrosion des Rings entgegen.Generally, the cylindrical ring 20 with the main body 22 to reach into the region of the insertion, but there are covered by an insulating plastic collar 24 as part of the anchor. The plastic collar has a thickness of 3 mm to 5 mm. The function of a plastic collar over the cylindrical ring is to provide sufficient electrical insulation between a tie screw threaded into the anchor and the cylindrical ring. Furthermore, the plastic collar counteracts the corrosion of the ring.

Die in Figur 2 dargestellte Ausführungsform entspricht im Wesentlichen derjenigen nach Figur 1, weshalb die Bezugszeichen dieser Figur hier übernommen werden, unterscheidet sich jedoch durch eine zusätzliche Beschichtung des Stahlrings in Form des Kunststoffkragens 24. Diese Beschichtung ist am äußeren Umfang des gesamten Stahlrings ausgeführt und verhindert, dass der Stahlring mit der Umgebung in direkten Kontakt tritt und somit korrodiert oder einen unerwünschten elektrischen Kontakt einer in den Dübel eingedrehten Schraube mit der Schwelle oder Festen Fahrbahn herstellt.In the FIG. 2 The embodiment illustrated corresponds essentially to that according to FIG FIG. 1 Therefore, the reference numerals of this figure are adopted here, but differs by an additional coating of the steel ring in the form of plastic collar 24. This coating is carried out on the outer circumference of the entire steel ring and prevents the steel ring comes into direct contact with the environment and thus corroded or produces an undesirable electrical contact of a screw screwed into the dowel with the threshold or slab track.

Claims (10)

  1. Screw anchor for setting in concrete in a railway sleeper or ballastless track and force-locking connection to a sleeper screw, comprising:
    - a threaded section (14) having external thread turns (18) arranged on the outside of the screw anchor (10) as well as internal thread turns (19) arranged on the inside of the screw anchor; and
    - an upper partial section (16) with no external thread located near the anchor opening (26) when fitted;
    wherein the screw anchor (10) has two components made of different materials,
    a base body (22) made of plastic,
    and a cylindrical ring (20) made of a steel material which is mounted on the base body (22) in form-locking and/or force-locking relationship,
    characterised in that
    the coefficient of linear thermal expansion of the steel material of the cylindrical ring (20) is at least ten times lower than that of the plastic material of the base body (22) which it surrounds, and the coefficient of linear thermal expansion of the steel material of the cylindrical ring (20) does not exceed 3·10-5 l/K.
  2. Screw anchor according to claim 1,
    characterised in that the cylindrical ring (20) with the base body (22) in the fitted position extends upwards into the region of the anchor opening (26) for a sleeper screw and is preferably covered by a plastic collar (24) as part of the screw anchor (10).
  3. Screw anchor according to claim 1 or 2,
    characterised in that force-locking mounting is effected by corresponding adaptation of the inside diameter of the cylindrical ring (20).
  4. Screw anchor according to any of the preceding claims,
    characterised in that the cylindrical ring (20) has a wall thickness of between 0.5 mm and 5 mm.
  5. Screw anchor according to claim 2 or either of claims 3 and 4 insofar as they refer back to claim 2,
    characterised in that the cylindrical ring (20) extends as far as the beginning of the external thread turns (18) which is at the top from the fitted position.
  6. Screw anchor according to any of the preceding claims,
    characterised in that the coefficient of linear thermal expansion of the steel material of the cylindrical ring (20) corresponds approximately to that of concrete and does not exceed 3·10-5 l/K.
  7. Screw anchor according to any of the preceding claims,
    characterised in that the steel material of the cylindrical ring (20) is distinguished by such a high modulus of elasticity that the cylindrical ring (20) mounted on the anchor does not substantially expand when heated within the temperature range in which it will be used, the modulus of elasticity being preferably not more than 150 GPa.
  8. Screw anchor according to any of the preceding claims,
    characterised in that the external thread (18) is a round thread.
  9. Screw anchor according to any of the preceding claims,
    characterised in that the cylindrical ring (20) is thinly coated with plastic, preferably with a plastic layer (24) of which the thickness is between 0.1 mm and 1 mm.
  10. Railway sleeper or ballastless track having at least one screw anchor according to any of the preceding claims.
EP10177840.5A 2010-09-21 2010-09-21 Screw-in dowel for rail fixings Active EP2431520B1 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
ES10177840.5T ES2544261T3 (en) 2010-09-21 2010-09-21 Threaded stud for rail fixing
PL10177840T PL2431520T3 (en) 2010-09-21 2010-09-21 Screw-in dowel for rail fixings
EP10177840.5A EP2431520B1 (en) 2010-09-21 2010-09-21 Screw-in dowel for rail fixings
EA201390416A EA201390416A1 (en) 2010-09-21 2011-09-21 SCREW ANCHOR FOR STRING
US13/825,147 US20130228634A1 (en) 2010-09-21 2011-09-21 Screw dowel for fastening rails
EP11757895.5A EP2619368A1 (en) 2010-09-21 2011-09-21 Screw dowel for fastening rails
CN2011800559265A CN103314157A (en) 2010-09-21 2011-09-21 Screw dowel for fastening rails
ARP110103439A AR083067A1 (en) 2010-09-21 2011-09-21 THREADED ANCHORAGE TO INTEGRATE TO THE CONCRETE IN A SLEEP OF RAILWAY OR FIXED ROAD, SLEEP OR FIXED ROAD WITH SUCH ANCHORAGE
PCT/EP2011/066399 WO2012038464A1 (en) 2010-09-21 2011-09-21 Screw dowel for fastening rails

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10177840.5A EP2431520B1 (en) 2010-09-21 2010-09-21 Screw-in dowel for rail fixings

Publications (2)

Publication Number Publication Date
EP2431520A1 EP2431520A1 (en) 2012-03-21
EP2431520B1 true EP2431520B1 (en) 2015-06-17

Family

ID=43508807

Family Applications (2)

Application Number Title Priority Date Filing Date
EP10177840.5A Active EP2431520B1 (en) 2010-09-21 2010-09-21 Screw-in dowel for rail fixings
EP11757895.5A Withdrawn EP2619368A1 (en) 2010-09-21 2011-09-21 Screw dowel for fastening rails

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP11757895.5A Withdrawn EP2619368A1 (en) 2010-09-21 2011-09-21 Screw dowel for fastening rails

Country Status (8)

Country Link
US (1) US20130228634A1 (en)
EP (2) EP2431520B1 (en)
CN (1) CN103314157A (en)
AR (1) AR083067A1 (en)
EA (1) EA201390416A1 (en)
ES (1) ES2544261T3 (en)
PL (1) PL2431520T3 (en)
WO (1) WO2012038464A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011147568A1 (en) * 2010-05-26 2011-12-01 Schwihag Ag Plastic screw plug for attaching a rail to a sleeper
DE102012200462A1 (en) * 2012-01-13 2013-07-18 Hilti Aktiengesellschaft expansion anchor
DE102012107732A1 (en) * 2012-08-22 2014-05-15 Vossloh-Werke Gmbh Plastic dowel for fixing a rail and combination of such a plastic dowel and a sleeper screw
CN106151208A (en) * 2016-06-29 2016-11-23 杭州斯泰新材料技术有限公司 A kind of chemistry bolt and manufacture method
US20210008462A1 (en) * 2018-01-04 2021-01-14 KidKraft, Inc. Play structure and play structure assembly methods
DE102018117453A1 (en) * 2018-07-19 2020-01-23 Schwihag Ag Gleis- Und Weichentechnik Rail fastening system
KR102307075B1 (en) * 2020-11-26 2021-10-01 성화시스템챤넬(주) Precast-concrete structure fixed full thread bolt and it's anchor construction method

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Publication number Priority date Publication date Assignee Title
GB961877A (en) * 1900-01-01
GB865120A (en) * 1958-05-07 1961-04-12 Samuel Tippett Improvements relating to the holding down of rails on sleepers
GB961876A (en) * 1961-12-15 1964-06-24 Samuel Tippett Improvements relating to sleeves for use in holding down railway lines on sleepers
DE3622860A1 (en) * 1986-07-08 1988-01-28 Wayss & Freytag Ag Plastic inserts for concrete sleepers
FR2677677B1 (en) * 1991-06-17 1996-07-05 Urba INSERT FOR FIXING ANCHOR OF RAILWAY CROSSINGS.
DE4230428A1 (en) * 1991-12-09 1993-06-17 Hilti Ag SLEEVE FOR INCREASING THE HOLD VALUE OF A SCREW
DE19601810A1 (en) * 1996-01-19 1997-07-24 Hilti Ag Anchor sleeve for composite anchors and method for creating corrosion-resistant fastenings
CN2661748Y (en) * 2003-01-23 2004-12-08 株洲时代新材料科技股份有限公司 Plastic casing for concrete sleeper
CN101058966A (en) * 2006-04-21 2007-10-24 上海颉灏机械有限公司 Embedded sleeve for concrete switch tie and preparation method for screw shell thereof
ES2283235B1 (en) * 2007-04-04 2009-03-01 Mondragon Soluciones, S.L.U. SHEATH FOR RAIL RAIL FASTENINGS, PROCEDURE FOR REPLACING SUCH SHEATH ON A CROSS AND TOOLS TO EXECUTE SUCH PROCEDURE.
EP2333154B1 (en) * 2009-12-09 2016-02-24 Vossloh-Werke GmbH Screw-in dowel for rail fixings
WO2011147568A1 (en) * 2010-05-26 2011-12-01 Schwihag Ag Plastic screw plug for attaching a rail to a sleeper

Also Published As

Publication number Publication date
PL2431520T3 (en) 2015-11-30
EA201390416A1 (en) 2013-08-30
EP2619368A1 (en) 2013-07-31
ES2544261T3 (en) 2015-08-28
AR083067A1 (en) 2013-01-30
EP2431520A1 (en) 2012-03-21
WO2012038464A1 (en) 2012-03-29
US20130228634A1 (en) 2013-09-05
CN103314157A (en) 2013-09-18

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