EP2609255A1

EP2609255A1 - Rail fastening system

Info

Publication number: EP2609255A1
Application number: EP11748579.7A
Authority: EP
Inventors: Roland Buda
Original assignee: Schwihag AG
Current assignee: Schwihag AG
Priority date: 2010-08-27
Filing date: 2011-08-16
Publication date: 2013-07-03
Anticipated expiration: 2031-08-16
Also published as: PT2609255T; PL2609255T3; EP2609255B1; ES2598527T3; WO2012025201A1

Abstract

The invention relates to a rail fastening system (1) for fastening a rail (2) to a crosstie (3) of a track system in a friction-locked and elastic manner, comprising at least one angular guide plate (5) that can be fastened to the crosstie (3) by means of at least one fastening element (4) and at least one tension clamp (6), wherein in the finally assembled state of the rail fastening system (1) the tension clamp (6) presses on the rail foot (7) with at least one section (6') and thus fastens the rail (2) to the crosstie (3), wherein an isolating element (8) is arranged between the at least one section (6') of the tension clamp (6) and the rail foot (7).

Description

Rail fastening system

The invention relates to a rail fastening system for frictional-elastic fastening of a rail on a threshold of a track system comprising at least one definable at the threshold with at least one fastener angle guide plate and at least one tensioning clamp, wherein the tensioning clamp in the final assembled state of the rail fastening system with at least a portion of the rail presses and so sets the rail on the threshold.

A generic rail fastening is known from DE 34 00 110 C2, wherein a fastening system is disclosed in which the tension of the railway rail by means of the components screw, dowel, angle guide plate and clamp takes place. There is a tension clamp used, which is arranged in the assembled state between an angle guide plate (retaining plate) and a screw (fastening anchor). The tension clamp has two legs, which are designed as Torsionselemente. The Torsionsschenkel have two parallel adjacent spring bar sections, which are integrally connected by a tensioning portion forming and substantially transversely outwardly bent loop.

To a generic rail fastening system thereby put various tasks:

Firstly, it is desirable that different types of rails (for example of the type U 50 and of the type UIC 60) with different rail types foot widths on different types of concrete sleepers can be clamped with only one Spannklemmtyp. The adjustment can be done via different angle guide plates.

Then it is for a simple, inexpensive and safe installation of the rail fastening system advantageous if the assembly can be done by moving the clamp from a pre-assembly (with a tightening of the screw with a torque of about 50 Nm) in the final assembly position. It is important that a simple sliding of the tension clamp by means of a slider without prior release of the (biased with said torque) screw can be done. It is also important here that raising the threshold is not necessary, which would make the assembly much more difficult. Only in this way is automated assembly possible.

Another aspect is that the rail attachment reaches a high electrical resistance. This is measured between the two rails on a concrete sleeper in the wet state, d. H. the resistance value is measured during a continuous irrigation.

The previously known rail fastening systems still have weak points with regard to these task fields.

The invention is therefore the object of a rail fastening system of the type mentioned in such a way that the requirements described above can be optimally met. Accordingly, a simple and automated installation of the system should be possible, which can be easily adapted to different types of rails. Furthermore, the system should be characterized by a high electrical resistance. The electrical insulation of the system should be ensured under all circumstances. This object is achieved in that between the at least one (end) portion of the tension clamp and the rail an insulating element is arranged.

The tension clamp is preferably formed symmetrically to a vertically extending plane which is penetrated vertically by the rail longitudinal axis, wherein two (end) portions of the tension clamp are surrounded by a single insulating element.

The tensioning clamp can consist of a bent wire with a circular cross-section, wherein this can have a secant-shaped flattening in the region of the at least one (end) section, wherein the insulating element has at least one receiving section congruent to the shape of the flattened section, preferably two of these sections in FIG opposite end portions of the insulating element. As a result, the insulating element is fixed against rotation about the wire axis. This has a particular effect if it is provided according to further development that the insulation element has a flattening on an outer side, which is adapted to the shape of the surface of the rail foot, wherein the flattening is particularly flat. Then that is the insulating element - mounted on the end portions of the tension clamp - held in position so that said flattening matches the shape of the rail foot on this comes to rest, whereby otherwise the assembly is facilitated.

The insulation element may be formed as a one-piece molding. A preferred embodiment provides that it is designed as an injection molded part, wherein this consists of two relatively foldable parts, which are connected to each other via a hinge portion. Here, a film hinge (or folding hinge) is preferably used. The two hinged to each other Parts may further be equipped with a latching or clip closure, so that they can be connected relative to one another.

In an outer side of the insulating element, a recess may be incorporated, which is adapted to the shape of a portion of the tension clamp.

The rail fastening system may further comprise an anchoring element fixed in the threshold and cast in particular into the (concrete) material of the sleeper. In this case, then, the fastening element comprise a positive lockable in the anchor element screw and an associated nut. After this solution, so the usual and generally known fixing the rail at the threshold by means of a screw-dowel combination is replaced by a hook-nut-nut combination.

Between the threshold and the rail foot an insulating element is preferably arranged. This consists mostly of a flat or flat trained rubber part. The angle guide plate is preferably made of an insulating material, in particular of plastic.

The tension clamp may be provided on its upper side with at least one flattening, which the mountability, d. H. facilitates the movement of the tension clamp from the pre-assembly to the final assembly position.

With the proposed design of the rail fastening system can be achieved that a high electrical resistance between the rail and the threshold is ensured, while still a simple and automatable mounting of the fastening system can be done.

During assembly, the fastening nut is first tightened with a predetermined pre-assembly torque. By moving the tension clamp Rizontal and perpendicular to the longitudinal axis of the rail, the tension clamp is moved to the final assembly position; the insulated end of the tension clamp thus comes on the rail foot, so that the rail is fixed on the threshold.

In the drawings, embodiments of the invention are shown. Show it:

Figure 1 is a perspective view of a rail fastening system including threshold and rail for a first rail type (UIC60 rail), the right side, the pre-assembly and left side, the final assembly position is shown.

Fig. 2 in the illustration of Figure 1, the rail fastening system for a second rail type (U50 rail).

Fig. 3a is a perspective view of a tension clamp of the rail fastening system;

FIG. 3a shows the plan view associated with FIG. 3a; FIG.

FIG. 3c shows the side view associated with FIG. 3a; FIG. FIG. 4a shows the perspective view of an insulation element in the assembled state; FIG.

4b shows the perspective view of the insulation element according to FIG. 4a, seen from another viewing direction;

4c shows the perspective view of the insulation element according to FIG. 4a in the unfolded state;

5 is a perspective view of an anchor element, which is part of the

Rail fastening system is;

6 is a perspective view of two anchor elements and the rail to be fastened, seen from a low-lying position.

Fig. 7a is a perspective view of an angled guide plate of the rail fastening system as seen from a low position;

Fig. 7b is the perspective view of the angled guide plate of Figure 7a, seen from a higher position. 8a is a plan view of an angle guide plate for a first rail type; and

Fig. 8b is a plan view of an angled guide plate for a second rail type.

In Fig. 1, the basic structure of a frictional-elastic rail fastening system 1 for a track system can be seen. The rail 2 must be mounted on a (track) threshold 3 (or a rail underlay plate). The rail 7 is clamped over tension clamps 6 on the track sleeper 3 immovably. In the prior art, in such a rail fastening system 1, the tension of the tensioning clamps 6 and the determination of the components of the rail fastening system usually via a screw-dowel combination. In the present case, a hook screw-nut combination 4, 4 ', 4 "described in more detail later is provided for this purpose.

In order to ensure electrical insulation of the rail 2 relative to the track sill 3 and / or the steel elements of the rail fastening system 1, a rail intermediate layer made of a rubber material is arranged between the rail foot 7 and the track sleeper 3, which can be seen as the insulation element 15 in FIG , The clamps 6 are mounted on the armature insulation on the one hand on existing plastic material angled guide plates 5 on the sill 3 and on the other hand on their the rail foot 7 act on clamping clamp arms 6 'insulation elements 8 (insulator) on. The illustrated rail fastening system 1 is designed such that a permanent electrical insulation of the tensioning clamps 6 with respect to the steel elements of the rail fastening system 1 is ensured. Furthermore, it is ensured that the rail fastening system 1 can be easily preassembled and easily adapted to different rail foot widths. In this case, two (or more) rail types with different rail foot widths (eg UIC60 and U50) are braced on the track sleepers 3 by means of the same tensioning clamps 6 or only one type of tensioning clamp and adapted angle guide plates 5 of different widths.

For the holder of the rail 2 and, in particular, the rail foot 7, an angle guide plates 5 are thus provided on both sides of the rail 2, which are screwed to the threshold 3, each with a fastening element 4. The non-positively elastic mounting of the rail foot 7 via the tension clamp 6, which is clamped by the fastener 4 with. In Fig. 1, a pre-assembly position I is shown in the right half of the picture, in which the nut 4 "of the fastener 4 is tightened with a tightening torque of about 50 Nm, that is, not yet properly tightened.

In the left half of Fig. 1, however, the final assembly position II is shown, in which - compared to the right half of the picture - the tension clamp 6 has been moved in a direction of displacement R perpendicular to the rail longitudinal axis L on the rail. For the end of the tensioning clamp 6 facing away from the rail 2 - formed on the angled guide plate 5 - a guide bead 21 for the preassembly position I and a guide bead 22 for the final assembly position II can be seen, so that the tension clamp 6 in both of the mentioned positions in FIG defined position is maintained. In the final assembly position, the nut 4 "on a screw 4 'of the fastener 4 is tightened (with the final torque) (see left half of the figure in Fig. 1). FIGS. 1 and 2 show two different types of rails. Fig. 1 shows the rail type UIC60, while Fig. 2 shows the rail type U50. Both rail types (and of course others) can be mounted on the threshold with the rail fastening system 1 shown, wherein only different angle guide plates 5 are used (see Fig. 8, which will be explained later). All other elements can be used identically.

In Fig. 3, a tension clamp 6 is shown in various views. The tension clamp 6 is formed symmetrically to a plane which extends vertically and is penetrated vertically by the rail longitudinal axis L. The tension clamp 6 is made of a cross-sectionally round wire. The end portions 6 'of the tension clamp 6 have a flat 9, which is ground edge-shaped. An middle loop 6 "'of the tension clamp has a center section 6", which faces the rail 2 in the mounted state.

On top of the tension clamp 6 a flattening 16 is ground, d. H. the essentially W-shaped tensioning clamp 6 (see Fig. 3b) is formed in the region of the U-shaped central loop 6 "'at its upper, the nut 4" side facing the flattening 16. The rail section 7 facing the center portion 6 "of the tension clamp 6 (end portion of the" U ") is additionally bevelled to reduce the height, especially in the pre-assembly of the rail fastening system and falls down from the flattening 16 in the middle loop 6" 'down ( See in particular the two sections of the flattening 16 in Fig. 3c).

In Fig. 4, the insulating element 8 is shown in various views. The insulation element 8 is designed to positively receive the two opposite end portions 6 'of the tension clamp 6 and to electrically insulate them against the rail foot 7. The insulating element 8 consists of a one-piece plastic molded part made of high-strength and highly insulating plastic. It consists of a lower part 8 'and an upper part 8 ", which can be folded relative to one another in the form of a film hinge via a hinge section 12. In the closed position, the upper part 8" can be locked by means of a latching or locking device. Clip closure relative to the lower part 8 'are fixed. Before closing the two parts 8 ', 8 ", the two end portions 6' of the tensioning clamp 6 have been inserted into receiving portions 10 of the insulating element 8. The flattened portions 9 of the end portions 6 'of the tensioning clamp 6 find congruent portions 25 in the receiving portions 10, so that the end portions 6 'of the tension clamp 6 are received in an oriented position and - after closing the parts 8', 8 "- fixed.

At the bottom, the lower part 8 'of the insulating member 8 is provided with a flat 11, which - aligned to the portion 25 - is arranged so that the insulating member 8 is held in a position such that the flattening 11 after assembly of the tensioning 6 just rests on the rail 7. On its underside and thus in the bearing point on the rail foot 7, the insulating element 8 is thus provided with a slightly sloping away from the rail 2 inclined surface 11, the sliding of the tension clamp 6 from the preassembly position I in the final assembly position II on the rail 7 improved sliding allows.

The free ends 6 'of the clamping clamp arms are enclosed by the insulating element 8; the insulation element 8 is formed at its two front ends with cylindrical receiving openings 10 in cross-section and therein to the flats 9 of the clamping clamp arms 6 'complementary, straight surfaces 25. Thus, an anti-rotation of the insulator is achieved as soon as it is clipped onto the clamping clamp arms 6 '. The assembly of the insulation element 8 at the tension clamp 6 and in particular at its end portions 6 'is thus possible in a simple manner.

On its upper side, the insulating element 8 has a recess 13 in the area between the two-sided receiving sections 10. This recess 13 is shaped to fit the contour of the center portion 6 "of the tension clamp 6, that is, the recess 13 can receive the closed end of the center portion 6". In this respect, the recess 13 constitutes a lower-lying bearing bed for the middle section 6 ", which leads to a reduction in the overall height of the tension clamp isolator unit and thus contributes to reducing the overall height in the preassembled state.

In Figures 5, 6 and 7, the proposed fastening system is shown in detail, which dispenses with a conventional screw-dowel combination and instead uses a hook-nut-nut combination 4. In Fig. 5, an anchor element 14 is shown, of which two pieces are required to define a rail 2 on both sides of a threshold 3. The anchor elements 14 are cast in the material of a concrete sleeper and thus firmly connected to the threshold 3.

An upper support portion 26 of the anchor member 14 has a receiving groove 17 which is dovetail-shaped. In this receiving groove 17, a screw 4 '(see Fig. 6) are inserted in the horizontal direction, which has at its lower end a base portion 27 which is formed congruent fitting to the receiving groove 17. The screw 4 'is thus positively fixed in the anchor member 14.

On the preassembled unit from above the angle guide plate 5 is placed, as can be seen in Fig. 7. The angle guide plate 5 has a right Eck-shaped recess 18 which is formed to match the cuboid support portion 26. If the angle guide plate 5 placed on the anchor member 14, the base portion 27 of the screw 4 'is accordingly chambered so that the screw 4' can not be removed. An additional support provides a projection 19, which is formed on the angled guide plate 5 and formed so that it can engage in a receptacle 20 of the anchor member 14 (see Fig. 5).

8 it can be seen that two differently dimensioned angle guide plates 5 and 5 'can be used to realize different head webs 23 and 24 respectively, which makes it possible to use different rails 2 and 2' (see FIGS fix, with otherwise identical components of the rail fastening system. 1

The wider track rail angle guide plate 5 (eg, the UIC60 rail type) has a narrower head land 23 than that for a narrower rail foot (eg, the U50 rail type) which defines the angle guide plate 5 on its side toward the rail. Accordingly, the angle guide plate is thus seen slightly shorter in the direction of the rail. For the wider rail foot (UIC60) so a narrower head bridge 23 is present and for a narrower rail foot (U50) according to a wider head restraint 24th

LIST OF REFERENCE NUMBERS

Rail fastening system

rail

'Rail

threshold

Fastening element (hook screw-nut combination) 'Screw (hook screw)

" Mother

Angled guide plate

'Angle guide plate

tension clamp

'Section (end section) of the tension clamp

"Section (center section) of the tension clamp

'"Middle loop of the tension clamp

rail

insulation element

Part of the isolation element

"Part of the insulation element

flattening

0 recording section

1 flattening

2 hinge section

3 recess

4 anchor element

5 insulation element

6 flattening

7 receiving groove (dovetail-shaped) 18 recess (rectangular)

19 advantage

0 Recording for projection 1 guide bead final assembly

22 Lead bead Pre-assembly 3 Narrow head bridge

24 wide headboard

25 section

26 carrier area

27 base section

L rail longitudinal axis

R shift direction

i Pre-assembly position

II final assembly position

Claims

claims

1. rail fastening system (1) for frictional-elastic attachment of a rail (2) on a threshold (3) of a track system, comprising at least one at the threshold (3) with at least one fastener (4) fixable angle guide plate (5) and at least one tension clamp (6), wherein the tension clamp (6) presses in the final assembled state of the rail fastening system (1) with at least one portion (6 ') on the rail foot (7) and thus sets the rail (2) on the threshold (3),

characterized,

in that an insulation element (8) is arranged between the at least one section (6 ') of the tensioning clamp (6) and the rail foot (7).

2. Rail fastening system according to claim

characterized,

in that the tensioning clamp (6) is formed symmetrically to a vertically extending plane which is penetrated perpendicularly by the rail longitudinal axis (L), two sections (6 ') of the tensioning clamp (6) being surrounded by an insulating element (8).

3. Rail fastening system according to claim 1 or 2,

characterized,

in that the tensioning clamp (6) consists of a curved wire with a circular cross-section, the latter having a secant-shaped flattening (9) in the region of the at least one section (6 '), the insulating element (8) forming at least one of the flattened section (FIG. 6 ') has congruent receiving portion (10).

4. Rail fastening system according to one of claims 1 to 3, characterized

the insulation element (8) has on an outer side a flattening (11) which is adapted to the shape of the surface of the rail foot (7), wherein the flattening (11) is particularly flat.

5. Rail fastening system according to one of claims 1 to 4,

characterized,

that the insulation element (8) is formed as a one-piece molded part.

6. Rail fastening system according to claim 5,

characterized,

in that the insulating element (8) is designed as an injection molded part, which preferably consists of two parts (8 ', 8 ") which can be folded relative to one another, which are connected to one another via a hinge section (12), in particular via a film hinge, wherein the two mutually hinged parts (8 ', 8 ") are preferably connectable relative to each other with a detent or clip closure.

7. Rail fastening system according to one of claims 1 to 6,

characterized,

a recess (13), which is adapted to the shape of a section (6 ") of the tensioning clamp (6), is incorporated in an outer side of the insulating element (8).

8. Rail fastening system according to one of claims 1 to 7, characterized

in that it comprises an anchoring element (14) fixed in the sleeper (3), in particular cast into the material of the sleeper (3), wherein the fastener (4) has a screw (4 ') which can be fixed positively in the anchoring element (14) and an associated bolt Includes mother (4 ").

9. Rail fastening system according to one of claims 1 to 8,

characterized,

an insulation element (15) is arranged between the threshold (3) and the rail foot (7), the insulation element (15) preferably being made of rubber, the angle guide plate (5) preferably being made of an insulating material, in particular of plastic.

10. Rail fastening system according to one of claims 1 to 9,

characterized,

the tensioning clamp (6) is provided on its upper side with at least one flattening (16).