EP3049572B1 - Rail fastener and arrangement comprising such a rail fastener - Google Patents

Description

The invention relates to a rail fastener comprising an anchoring shaft for securing the rail fastener in a mounting base, such as a rail carrying threshold, and a head formed on the anchoring shaft, provided with means for receiving a torque for the purpose of screwing the anchoring shaft into the mounting base. Furthermore, the invention relates to a rail fastening arrangement with such a rail fastener.

Railroad tracks are laid on sleepers. The rails themselves have a mounted on the top of the threshold mounting flange. The rails are attached to the sleepers by rail fasteners which are secured with an anchoring shaft in the sill adjacent to the rail. For holding the rail in each case serves a substantially U-shaped rail retainer spring which projects with its connecting the two legs section over the rail head opposite the mounting flange of the rail and is clamped against this by the rail fastener. Such a rail fastener comprises the already mentioned anchoring shaft and a head formed thereon. The head is designed as a polygonal head, so that by means of a tool on the same for setting a torque can be initiated. At the bottom of the head, a collar is formed to provide a sufficiently projecting projection which acts on the top of the legs of the hold-down spring. To compensate for movement between the rail and the threshold, a flexible rail attachment is required. This purpose is served by the hold-down spring used. In this known Schienenbefestiger is the same anchored by screwing the anchoring shaft in the mounting base of the fastener and at the same time the hold-down spring clamped against the mounting flange of the rail. If the sleepers are prefabricated concrete elements, these are equipped with dowels inserted in prefabricated fixing holes, so that the anchoring shaft is in one engages such dowel to its determination. As dowel plastic anchors are preferably used.

FR 2 315 568 discloses a rail fastener having an anchoring shaft for securing the rail fastener in a mounting base, such as a rail supporting threshold. US 6,350,093 A also discloses such a rail fastener. Such rail fasteners are in use worldwide. Due to the occurring movements between the rail and the threshold, they must be checked at regular intervals in relation to the rail anchorage. Often a retightening of the rail fasteners is required. In order to ensure safe railway operation, it is necessary to regularly inspect the rails, often several times a year.

Based on this discussed prior art, the invention is therefore based on the object to propose a rail fastener and a rail fastening arrangement, with which or is ensured that even at strained routes loosening of the rail anchorage is effectively avoided.

• an dem Kopf auf seiner dem Verankerungsschaft gegenüberliegenden Seite ein Gewindeschaft angeformt ist oder
  in den Kopf und/oder den daran angeformten Verankerungsschaft von seiner dem Verankerungsschaft gegenüberliegenden Seite eine mit einem Innengewinde ausgestattete Gewindebohrung eingebracht ist,
• der Kopf einen den Gewindeschaft bzw. die Gewindebohrung ringförmig einen einfassenden Oberflächenabschnitt als erste Widerlagerfläche aufweist,
• der Schienenbefestiger ein auf dem Gewindeschaft sitzendes bzw. in das Innengewinde des Kopfes und/oder des Verankerungsschaftes eingreifendes, das jeweilige Gewinde kämmendes Spannelement mit einem nach außen auskragenden Vorsprung zur Abstützung an zumindest einem Schenkeln einer Schienenniederhalterfeder und mit einem daran in Richtung zum Kopf hin angeformten Schaftabschnitt mit einer zu dem Kopf weisenden zweiten, mit der ersten Widerlagerfläche korrespondierenden Widerlagerfläche und
• sich zwischen den beiden Widerlagerflächen eine Sicherungsscheibe oder eine Sicherungsscheibenanordnung befindet, die sich zum Bewirken einer Losdrehhemmung des Spannelementes an den Widerlagerflächen abstützt.

This object is achieved according to the invention by a rail fastener of the type mentioned, in which

• on the head on its side opposite the anchoring shaft side a threaded shaft is formed or
  a threaded hole provided with an internal thread is inserted in the head and / or the anchoring shaft formed thereon from its side opposite the anchoring shaft,
• the head has a threaded shank or the threaded bore in a ring-shaped manner as a first abutment surface,
• the rail fastener sitting on the threaded shaft or in the internal thread of the head and / or the anchoring shank engaging, the respective thread meshing clamping element with an outwardly projecting projection for support on at least one leg of a rail hold-down spring and with a thereto in the direction of the head integrally formed shank portion with a pointing to the head second, with the first abutment surface corresponding abutment surface and
• is located between the two abutment surfaces, a locking washer or a lock washer arrangement, which is supported for effecting a Losdrehhemmung the clamping element on the abutment surfaces.

In the case of this rail fastener, a separation between the functionalities "anchoring in the fixing ground" and "prestressing the hold-down spring" is realized for the first time. This means that the setting of the anchoring shank in the mounting base, that is: approximately in a threshold, is decoupled with regard to the applied torque of that force with which the hold-down spring is biased against the mounting flange of the rail. The hold-down spring is clamped between the head of the rail fastener and a cooperating with this clamping element. The tensioning element can be designed, for example, as a nut. In such an embodiment, a complementary threaded shaft is integrally formed on the head on its side opposite the anchoring shaft. According to another embodiment, it is provided that the clamping element is designed as a screw body with a threaded shank which engages in an introduced into the head and / or the anchoring shaft of the rail fastener bore with a complementary internal thread. In this rail fastener, the clamping element relative to the head is clamped. Provided for Losdrehsicherung these two, essential for the intended rail fastening elements that the mutually facing surfaces of these elements each have or form an abutment surface and that between the abutment surfaces a locking washer or a lock washer arrangement is arranged. As a result of this functional separation can be applied between the two parts - the clamping element and the head - with the interposition of the locking washer or the lock washer arrangement such a torque that is provided an effective anti-rotation lock. It is essential that the torque applied in this regard is not introduced into the anchoring shaft. For this reason, differently executed anchorages be provided by the anchoring shaft. If the anchoring shaft is a bolt provided with an external thread, plastic anchors are sufficient for an effective and durable anchoring of the anchoring shaft in the fastening base. It can also be envisaged to pour the anchoring shaft directly into this at a threshold manufactured as a precast concrete element. In such an embodiment, the anchoring shaft can carry one or more brackets protruding in the radial direction.

Inserting the above-described rail fastener on different mounting ground. This can for example be designed as a threshold. If reference is made in the context of these statements to a threshold as a mounting base, this includes any rail support on which rests the rail to be fastened. Completely possible are embodiments in which the mounting base is a concrete slab, which serves as a receptacle of the expected weight and for introducing it into the ground. In such an embodiment are sometimes thin Schienenauflager on the concrete slab made of plastic, on which rest the rails. In this embodiment, the anchoring shaft passes through such a rail support and is ultimately set in the concrete slab as anchoring reason.

The torque to be applied for effecting the anti-rotation lock between the clamping element and the head formed on the anchoring shaft is dependent on the selection of the locking washer or locking washer arrangement engaged between the abutment surfaces. In order to apply the torque required for clamping the clamping element relative to the head with the interposition of the locking washer or lock washer arrangement, without having to keep the head of the Schienenbefestigers actively secured against rotation, is provided in an embodiment in a rail fastening arrangement that the head with its underside against the top the attachment ground is braced. Additionally or alternatively, an anti-rotation element can be used to prevent rotation of the head of the rail fastener. Such an anti-rotation element typically supports with a contact surface on the longitudinal course of the holding rail and is thereby secured against rotation. With one or more other surfaces, the anti-rotation element bears against the outside of the head of the rail fastener, which is typically designed as a polygon.

In the above-described conception, it is above all also possible for the clamping element to be clamped with respect to the head with a higher torque to that torque with which the anchoring shaft of the rail fastener is fixed in the threshold.

To effect the desired anti-rotation lock between the clamping element and the head of the Schienenbefestigers can be arranged between the abutment surfaces on the abutment surfaces a bias exerting lock washer, such as a spring washer or a toothed disc, with their Verklammerungsstrukturen, depending on the design of the disc on or supports two abutment surfaces.

According to a particularly preferred embodiment, instead of such a lock washer, a lock washer arrangement is provided, preferably a pair of wedge lock washer. These discs are two lock washers, where a Losdrehsicherung by a set clamping force and not by friction takes place. Such wedge securing disks or disk pairs are well known to a person skilled in the art. These have on their sides facing each other at a certain angle inclined V-ribs. At the sides facing away from each other for the purpose of clamping with the respective abutment, here: the abutment surface of the clamping element and the abutment surface of the head, cooperating radial ribs, typically designed like a sawtooth. The wedge surface angle of the wedge surfaces of the V-ribs of these discs is greater than the pitch angle of the screw thread used to effect a bias. With such a pair of lock was self-release of the clamping element against the head and the other components of the Schienenbefestigers is effectively prevented. According to a modification of such a lock provided one of the two wedge locking washers part of the clamping element, thus formed on this.

Thus, in such an embodiment, the wedge surfaces or the V-ribs are integrally formed on the clamping element and form the relevant abutment surface. The other to this disc loose wedge lock washer has with its radial ribs to the abutment surface of the head and with their V-ribs to the V-ribs of the clamping element.

For the purposes of a rotational security of the head during clamping of the clamping element relative to this, according to a preferred embodiment, an additional anti-rotation element. This may be a plastic injection molded part. Of course, this can also be made of other material, for example made of metal. Such an anti-rotation element has according to a preferred embodiment of a receptacle for the torque-locking receiving the head of the Schienenbefestigers. In such an embodiment, the head of the rail fastener is not rotationally symmetrical. Typically, one will provide a polygon head, such as a square head. If the head of the rail fastener used in this recording, this is held torque-tight therein. The anti-rotation element itself is in turn secured against rotation with respect to the mounting base, such as the threshold, held, for example, by the previously described contact surface, which comes to rest against the outside of the mounting flange of the rail. An anti-rotation of this anti-rotation element may also be provided with respect to the threshold itself, for example, by applied to one or both side surfaces of the threshold flaps.

In a development of such an anti-rotation element is provided that the receptacle for receiving the head of the rail fastener on the upper side, at least partially covered, wherein the cover rests on the top of the head. Typically, held down by such a rail fastener hold-down spring is supported with their spring ends on the side of the anti-rotation element. In such a configuration, the torque introduced via the tensioning element is then introduced over a large area into the anti-rotation element.

In one embodiment of the invention it is provided that the underside of the head - the side facing the anchoring shaft - carries bracing structures. These are designed to cooperate with complementary Verklammerungsstrukturen on the top of the rail or on the top of a placed on the threshold element, for example, to achieve a rotation lock. In such an embodiment, the rail fastener is not screwed into the mounting base, but cast, for example.

Fig. 1:

eine perspektivische Ansicht einer Schienenbefestigungsanordnung nach Art einer Explosionsdarstellung,

Fig. 2:

eine Längsschnittdarstellung durch die linke Seite des linken Anteils der Schienenbefestigung der Figur 1 nach Art einer Explosionsdarstellung,

Fig. 3:

die Schienenbefestigung der Figur 2 in ihrer die Schiene haltenden Anordnung,

Fig. 4:

eine Seitenansicht eines Spannelementes eines Schienenbefestigers gemäß einer weiteren Ausgestaltung und

Fig. 5:

eine Schienenbefestigung entsprechend derjenigen der Figur 3 in einer abgewandelten Ausgestaltung.

Further advantages and embodiments of the invention will become apparent from the following description with reference to an embodiment with reference to the accompanying figures. Show it:

Fig. 1:

a perspective view of a rail fastening arrangement in the manner of an exploded view,

Fig. 2:

a longitudinal sectional view through the left side of the left portion of the rail fastening the FIG. 1 in the manner of an exploded view,

3:

the rail fastening of the FIG. 2 in their rail holding arrangement,

4:

a side view of a clamping element of a Schienenbefestigers according to another embodiment and

Fig. 5:

a rail fastening according to those of FIG. 3 in a modified embodiment.

In FIG. 1 is shown schematically in a perspective view of a rail section. In the rail section shown, a rail 1 designed as a grooved rail in the illustrated embodiment is placed on a sleeper 2 and is supported by it. The rail 1 is connected to the threshold 2 by two rail fastening arrangements 3, 3.1, each rail fastening arrangement 3, 3.1 being arranged on one side of the rail. Thus, the rail 1 is bordered by the rail fastening arrangement 3, 3.1. The rail 1 has at its end opposite the rail head via a mounting flange 4, which protrudes on both sides of the rail web 5. The tops 6, 6.1 of the mounting flange 4 serve as an attack surface for fixing the rail 1 at the threshold 2. The rail fastening arrangements 3, 3.1 are of identical construction. The rail fastening arrangement 3 will be described in more detail below. The relevant explanations apply equally to the rail fastening arrangement 3.1.

The core of the rail fastening arrangement 3 is a rail fastener 7. The rail fastener 7 of the illustrated embodiment comprises 3 assemblies. The first assembly is an anchoring assembly 8. It is made in one piece and includes an anchoring shank 9 provided with a grooved external thread for engaging a dowel inserted into a mounting hole of the sill 2. At the anchoring shaft 9 a polygonal head 10 is formed. The polygonal head 10 projects beyond the anchoring shaft 9 and is dimensioned such that its diameter is greater than the diameter of the bore introduced into the sleeper 2 into which the anchoring shaft 9 engages. Shaped again on the top of the head 10 is a threaded shaft 11. The second anchoring assembly is realized by a clamping element 12. The clamping element 12 is formed in the illustrated embodiment by a nut 13, a lower side formed thereon collar 14 for providing a projection on which the hold-down spring to be determined with a portion, and a turn formed thereon sleeve-like shaft portion 15.

The third anchoring assembly is formed in the embodiment shown in the figures by a pair of wedge locking washer 16.

The anti-rotation element D has a receptacle 18 for receiving the head 10. The receptacle 18 is formed like an elongated hole, wherein in the illustrated embodiment, the longitudinal axis of the receptacle 18th acute angle to the longitudinal extent of the rail 1 extends. The clear width of the receptacle 18 (transverse width) corresponds to the distance between two diametrically opposite each other to the longitudinal axis surfaces of the head 10 of the Schienenbefestigers 7. Thus, the rail fastener 7, when the head 10 engages the receptacle 18 of the anti-rotation element D, torque-locked therein. The anti-rotation element D has a contact surface 19 following the longitudinal extension of the outer side of the mounting flange 4. Parallel to the longitudinal extension of the receptacle 18, the sill 2 bears on the upper side a vertically extending abutment surface 20. On this rests a second abutment surface 21 of the anti-rotation element D. The inclined with respect to the longitudinal extent of the rail 1 course of the longitudinal axis of the receptacle 18 and the parallel thereto contact surfaces 20, 21 serves the purpose of establishing the anti-rotation element D with respect to its distance from the rail 1. Due to the above bearing surfaces, the anti-rotation element D itself is held against rotation.

A rail hold-down spring 22 of the type known per se serves to hold the rail 1 on the threshold 2. For this purpose, the rail hold-down spring 22 is substantially U-shaped, with the leg connecting portion for holding the rail 1 on the side 6 of the mounting flange 4 is stretched.

The structure of the Schienenbefestigers 3 with its two anchoring assemblies 8, 16 and the clamping element 12 as a third anchoring assembly is in a longitudinal section in FIG. 2 shown. This gives more details. In the presentation of the FIG. 2 the anchoring assembly 8 is anchored with its screw shank 9 in a plastic dowel 23 inserted into the threshold 2. This has been done before the anti-rotation element D has been placed. The anchoring assembly 8 has been screwed in by attaching a torque-transmitting tool to or on the head 10. The head 10 projects over, as in the sectional view of FIG FIG. 2 clearly visible, the diameter of the dowel 23 receiving bore. Thus, the bottom of the head 10 is clamped against the top of the threshold 2. If the anchoring assembly 8 is set in the threshold 2, the anti-rotation element D is placed. From this illustration is Also recognizable that the cooperating bearing surfaces 20, 21 are inclined relative to the vertical.

Surrounding annularly the root of the threaded shaft 11, the top of the head 10 forms a first abutment surface 24. The abutment surface 24 is annular.

The clamping element 12 is designed in the manner of a sleeve. This has an internal passage 25 with a complementary to the thread of the threaded shaft 11 internal thread. In the section of the nut 13, a hexagon is formed on the outside. This is used to attach a torque transmitting tool for clamping the clamping element 12 relative to the first anchoring assembly 8 and the head 10. The pointing to the anchoring assembly 8 end face of the clamping element 12 forms a second annular abutment surface 26 which is aligned with the abutment surface 24 of the head 10. The abutment surfaces 24, 26 serve the purpose that it can support the mutually pioneering sides of the wedge lock washer pair 16. Wedge lock washer pairs, such as the wedge lock washer pair 16 are well known and, for example, sold under HEICO-LOCK ^® the HEICO Befestigungstechnik GmbH. The two lock washers 17, 17.1 of the wedge lock washer pair 16 are arranged to one another as intended, that is to say: The wedge ribs with the wedge surfaces serving for securing point to one another, while the radial ribs guiding them point away to an abutment surface 24, 26, respectively. The angle of inclination of the wedge surfaces of the wedge lock washers is greater than the pitch angle of the screw thread of the threaded shaft 11. When mounted rail fastener 3, the clamping element 12 is braced relative to the head 10 with the interposition of this pair of wedges washer 16. This clamping takes place with a predetermined torque, with which the clamping force with which the adjoining wedge surfaces the wedge locking discs 17, 17.1 abut each other for the purpose of the desired Losdrehsicherung set. The arranged on the sides facing away from each other radial ribs are designed like a sawtooth, with each steeper edge opposite to the respective Release movement points.

FIG. 3 shows the rail fastener 3 in its rail retainer spring 22 against the top 6 of the mounting flange 4 of the rail 1 as intended pressing arrangement of its individual parts. In this case, the anchoring assembly 8, as already to FIG. 2 described anchored in the threshold 2. Subsequently, the wedge lock washer pair 16 was first placed on the threaded shaft 11, wherein the wedge lock washer 17.1 rests with its radial ribs bearing side on the abutment surface 24. Then the hold-down spring 22 was inserted and the clamping element 12 threaded onto the threaded shaft 11. With a suitable tool, the clamping element 12 is screwed and braced relative to the non-rotatably held by the anti-rotation element D head 10 of the anchoring assembly 8, with the clamping force required for the intended deadlock of the two wedge lock washers 17, 17.1. Since the anchoring assembly 8 and the head 10 is held against rotation, this clamping force is not introduced into the anchoring shaft 9 and the dowel 23. Consequently, cost-effective plastic dowels can be used for proper anchoring of the anchoring assembly 8, which does not have to withstand the significantly higher clamping forces for bracing the wedge lock washers 17, 17.1 against each other. In this respect, a functional separation is effectively provided between the anchoring of the rail fastener in the threshold and for applying the necessary clamping force for holding down the hold-down spring, while simultaneously providing a particularly effective anti-rotation lock, which is designed in the illustrated embodiment as an intermediate wedge lock washer pair 16.

FIG. 4 shows a clamping element 12.1 according to a further embodiment. In the clamping element 12.1 its abutment surface 26.1 is formed by a V-rib arrangement, as this part of the wedge lock washer 17 was in the embodiment described above. In such an embodiment, between the clamping element 12.1 and the head of the anchoring assembly 8 only one wedge lock washer is used, in an orientation that the wedge surfaces complementary to the abutment surface 26.1 of the clamping element 12.1 and V-ribs to the clamping element 12.1 point.

FIG. 5 shows in a modified embodiment, a rail fastening assembly 3.2, as these in principle already above with reference to the FIGS. 1 to 3 is described. Therefore, the above statements apply to the embodiment according to the FIGS. 1 to 3 also for the rail fastening arrangement 3.2 of the embodiment of FIG. 5 unless otherwise specified below.

In the rail fastening arrangement 3.2, the anti-rotation element D 'in cooperation with the head 10.1 designed such that the force acting on the hold-down spring 22.1 clamping force due to their support on the top of the anti-rotation element D' also acts on the head 10.1. FIG. 5 shows a possible embodiment of the implementation of such a concept. For this purpose, the head 10.1 has a circumferential shoulder 27 with a bearing surface pointing away from the anchoring shaft 9.1. Complementary to this, the anti-rotation element D 'executes. This has a pointing towards the paragraph 27 complementary paragraph 28. In this embodiment, a small gap (in FIG. 5 not visible) between the underside of the anti-rotation element D 'and the top of the threshold 2.1 is provided. In this embodiment, thus acting on the hold-down spring 22.1 clamping force acts by the clamping of the clamping element 12.2 relative to the head 10.1 with the interposition of a pair of wedges washer 16.1 as a result of support of the hold-down spring 22.1 on the top of the anti-rotation element D 'and by the above arrangement of the Annex paragraphs 27, 28 upside down 10.1. Thus, the clamping force for clamping the clamping element 12.2 relative to the head 10.1 on the hold-down spring 22.1 and for effecting a rotation lock on the head 10.1, which is already clamped over the top of the threshold 2.1, from. This serves to relieve over the anchoring shaft 10.1 acting on the dowel 23.1 forces. Therefore, such a Schienenbefestiger can also be used when the anchoring shaft is embedded in the mounting base, for example, only with an epoxy, for example.

LIST OF REFERENCE NUMBERS

1

rail

2, 2.1

threshold

3, 3.1, 3.2

Rail fastening assembly

4

mounting flange

5

rail web

6, 6.1

top

7

Schienenbefestiger

8th

anchor assembly

9, 9.1

anchoring shaft

10, 10.1

Polygonal head

11

threaded shaft

12, 12.1, 12.2

clamping element

13

mother

14

Federation

15

shank portion

16, 16.1

Wedge lock washer pair

17, 17.1

Wedge lock washer

18

admission

19

contact surface

20

contact surface

21

contact surface

22, 22.1

Rail down spring

23, 23.1

dowel

24

Abutment surface

25

passage

26, 26.1

Abutment surface

D, D '

Rotation element

Claims (11)

1. Rail fastener, comprising an anchoring shaft (9) for fixing the rail fastener (7) to a fastening base, for example a sleeper (2) which bears the rail (1), and a head (10, 10.1) which is integrally formed on the anchoring shaft (9, 9.1), equipped with means for receiving a torque for the purpose of screwing the anchoring shaft (9, 9.1) into the fastening base, characterised in that

   - a threaded shaft (11) is integrally formed on the head (10, 10.1) on the side thereof opposite to the anchoring shaft (9, 9.1),
   or

   - a borehole equipped with an internal thread is made in the head (10, 10.1) and/or the anchoring shaft (9, 9.1) integrally formed thereon from the side thereof opposite to the anchoring shaft (9, 9.1),

   - the head (10, 10.1) has a surface portion as a first abutment surface (24) annularly surrounding the threaded shaft (11) or the threaded borehole,

   - the rail fastener (7) has a clamping element (12, 12.1, 12.2) seated on the threaded shaft (11) or engaging in the internal thread of the head (10, 10.1) and/or of the anchoring shaft (9, 9.1), meshing with the respective thread, which clamping element has an outwardly projecting projection for supporting on at least one leg of a rail hold-down spring (22, 22.1) and a shaft portion (15) integrally formed thereon in the direction of the head (10, 10.1), which shaft portion has a second abutment surface (26) directed towards the head (10, 10.1) and corresponding with the first abutment surface (24), and

   - between the two abutment surfaces (24, 26) there is situated a securing disc or a securing disc arrangement (16, 16.1), which is supported on the abutment surfaces (24, 26) to prevent the clamping element (12, 12.1, 12.2) from loosening.
2. Rail fastener according to claim 1, characterised in that a securing disc is engaged between the abutment surfaces, exerting pretension onto the abutment surfaces, such as a spring disc or a toothed disc.
3. Rail fastener according to claim 1, characterised in that a wedge-securing disc pair (16, 16.1) is engaged between the abutment surfaces (24, 26).
4. Rail fastener according to claim 1, characterised in that a wedge-securing disc is engaged between the abutment surfaces as a securing disc, which is supported with its radial ribs on the abutment surface provided by the head, and the abutment surface (26.1) of the clamping element (12.1) carries complementary wedge ribs, and the wedge-securing disc is supported with its wedge ribs on the complementary wedge ribs of the abutment surface (26.1) of the clamping element (12.1).
5. Rail fastener according to any one of claims 1 to 4, characterised in that assigned to the rail fastener (7) is a rotation-securing element (D, D'), which comprises at least one surface interacting with at least one outer surface of the head (10, 10.1) for the purpose of rotational securing of the head (10, 10.1).
6. Rail fastener according to claim 5, characterised in that the rotation- securing element (D, D') comprises a contact surface for the contact with the rail (1) which is to be held by the rail fastener (7).
7. Rail fastener according to claim 5 or 6, characterised in that the rotation-securing element (D, D') comprises a receiver (18) for receiving the head (10, 10.1) of the rail fastener (7) in a torque-resistant manner.
8. Rail fastener according to claim 6 or 7, characterised in that the rotation-securing element (D, D') comprises on its upper side one or more shaped receptacles to accommodate one or more sections of the hold-down spring (22).
9. Rail fastener according to any one of claims 6 to 8, characterised in that the receiver (18) of the rotation-securing element (D, D') is configured on its upper side at least partially as covering the head (10, 10.1) of the rail fastener (7).
10. Rail fastening arrangement, comprising a rail fastener (7) according to any one of claims 1 to 9, and a sleeper (2.2.1), as a bearing for a rail (1) as well as a securing base for the rail fastener (7), with said arrangement (3, 3.1, 3.2) the head (10, 10.1) of the rail fastener (7) projects over a borehole which is introduced into the sleeper (2, 2.1), into said borehole the anchoring shaft (9, 9.1) of the head engages, and in which the head is secured and tensioned against the upper side (6, 6.1) of the sleeper (2, 2.1).
11. Rail fastening arrangement according to claim 10, characterised in that the sleeper (2, 2.1) is a precast concrete component with a dowel engaged in each borehole such as to accommodate an anchoring shaft (9, 9.1), in particular a plastic dowel.

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