EP1413677B1 - Device for fastening rails - Google Patents

Abstract

A railway line has switch-points in which rails are anchored by a base-plate (2) with a slide plate (1). The slide plate has a detent (7) which receives a spring locking pin (8), spring locking plate or similar, and an abutment (14) extending the width of the detent. The plate has a claw (6) extending around the rail end.

Description

The invention relates to a device for fastening rails, in particular Back rails in a switch, consisting of a base plate for the rail with a sliding tongue for a switch blade thereon, wherein the slide chair extends up to over the rail foot recess for receiving a clamping bracket, a clamping plate or the like and at least one over the width of the recess extending abutment and formed at its end over the rail foot as a cantilever is.

Such as for the inner cheek rail mounting as well as the inner Rail mounting in turn-serving device is described in DE 32 30 612 A1 become known. It is equipped with an elastic overload or tilt protection equipped with both fractures of the usually two-legged clamping devices, such as in particular clamping bracket, as well as breaks on the base plates Whether it is made of parts in welded construction or are made in one piece from cast or forged parts. The underlay of the Rail carries a slide for the switch blades and a clamp mounting on the outside of the rail foot. In one to over the inside the rail foot reaching recess of the sliding chair is to hold down the rail foot is a substantially U-shaped spring clip on the Slide-in side can be inserted. The free ends of the legs of the spring clip are in the tensioned state of the spring clip by a latching connection with formations secured the sliding chair.

In the area of the recess is located on the underside of the sliding chair a hump-like shape, which acts as an abutment for the tensioned spring clip. Before the rail foot is on the underside of the sliding chair as an abutment further hump-shaped formation provided at normal tension of the Clamp a slight play against the top of the tension bracket which, however, when tilting the rail to form a shortened Lever arm on the spring clip is overcome.

Above all, higher axle loads and increased speeds of railway trains lead to larger forces that are transmitted via the wheels on the rails. In a normal track are those occurring from the wheel flanges of the wheels Horizontal forces superimposed by the vertical forces occurring from the wheel, so that a tilting of the rails usually can not occur or by the hold-down force of the arranged on both sides of the rail foot fasteners safely prevented. Although in a bow track act on the outer rail the track already increased lateral forces, which, however, also here usually by the simultaneous vertical forces of the wheel load not to tilt the stock rail to lead.

Quite different is the ratio of vertical forces to horizontal forces in the tongue device of a switch, in particular in the branching strand, dar. In addition to the occurring in the arc travel increased horizontal forces Namely, the wheel changes through the adjacent tongue in about the middle of the tongue device from the stock rail to the curved, branching tongue above. This eliminates the vertical forces on the stock rail from this point on, so that the vertical and horizontal forces occurring solely from the tongue rail must be recorded or transmitted. The tongue splint is here over numerous thresholds unpaved on the Gleitstuhlplatten on. The horizontal forces in this branching strand of the track are still very high and are exclusively via Stützknaggen, which at the web of the stock rail screwed, transferred to the stock rail. Because in this area, however There are no vertical forces on the stock rail, the horizontal forces affect fully out on the upper part of the web of the stock rail and guide for tilting the stock rail.

To prevent this tilting, it is known, especially on the inside provide the jaw foot hold-down devices. Here has become as Also suitable for high speeds and large axle loads hold-down device for the inside of the stock rail, the so-called internal stock rail bracing (IBAV) proven (see, for example, DE-AS 20 00 482, DE-PS 21 53 534, DE-AS 24 09 138). These have in the sliding chair inside clamping bracket that have an overload protection capable of sustaining stress Lifting forces caused by tilting the stock rail up to 20 KN to catch without causing overstressing the tension bow or for striking the rail on the cantilever of the sliding chair leads. However It has been shown that loosening of the Gleitstühle and / or Spannbügel- and plate breaks can not be ruled out with even higher forces.

The invention is therefore based on the object, a generic device to be able to withstand even the highest demands.

This object is achieved in that the cantilever above the rail foot end of the rail with a downward from the light profile of the rail Kragarmes outstanding abutment is provided. The to the slide chair or its cantilever immediately at the production with cast or forged Abutment allows the dimensional tolerances for lifting the Narrowing rail foot by machining with high accuracy. Furthermore, it was recognized that a far upstream, namely in the area of Kragarms arranged abutment the momentum and spring travel of the clamping element shortens and permanently overstresses the tensioning element (Clamp or the like) safely excludes.

According to an advantageous embodiment of the invention, two can be spaced apart Provide diametrically opposed abutment. After refinements The invention, the two mutually aligned abutment left and right next to the recess on the underside of the cantilever or alternatively in the region of a leg formed by legs of a tensioning bracket Loop be arranged in the recess of the sliding chair. That in both Cases thus two-part abutment can be in an area of the sliding chair attach, which is freely accessible with, for example, form milling, so that a corresponding precise machining of the stops a precise overload path can be achieved for the clamping element.

According to a further proposal of the invention, the transition between Base plate and cantilever of Gleitstuhles formed with a large radius. Hereby can be favored that despite the overload protection abutment under the cantilever and thus outside the stable frame when striking the rail foot to the or the abutment of the cantilever yet no increased stresses (notch stresses) occur, which leads to breakage of the Clamping elements or could lead to cancel the cantilever. Because one largest possible transition radius and thus optimized shaping of the Transition from the base plate to the sliding chair or to the cantilever arm of the sliding chair unlike a narrow transition radius makes due to the high forces occurring voltages harmless. The unhindered accessibility allows Again, the desired good and precise machining of the radii.

Fig.

1 in einer Teil-Seitenansicht einen auf einer Unterlags- bzw. Grundplatte angeordneten Gleitstuhl, ohne Schienen dargestellt;

Fig. 2

den Gleitstuhl nach Fig. 1 in der Draufsicht mit sehr schematisch eingezeichnetem Spannelement in Form eines Spannbügels;

Fig. 3

in einer sehr schematischen Draufsicht eine Ausführung eines Gleitstuhles mit im Bereich seines Kragarms angeordneten Widerlagern;

Fig. 4

in der Draufsicht eine andere Ausführung eines Gleitstuhls mit im Kragarmbereich angeordneten Widerlagern;

Fig. 5

in einem sehr schematischen Teil-Längsschnitt den Gleitstuhl nach Fig. 3 mit demgegenüber andeutungsweise eingezeichneter Backenschiene; und

Fig. 6

in einem sehr schematischen Teil-Längsschnitt den Gleitstuhl nach Fig. 4 mit einer demgegenüber andeutungsweise eingezeichneten Backenschiene.

Further features and details of the invention will become apparent from the claims and the following description of illustrated in the drawings embodiments of the invention. Show it:

FIG.

Figure 1 is a partial side view of a slide chair mounted on a base plate, shown without rails;

Fig. 2

the slide chair of Figure 1 in plan view with very schematically drawn clamping element in the form of a tensioning bracket ..;

Fig. 3

in a very schematic plan view of an embodiment of a sliding chair with arranged in the region of its cantilever abutments;

Fig. 4

in plan view, another embodiment of a sliding chair arranged in Kragarmbereich abutments;

Fig. 5

in a very schematic partial longitudinal section of the slide chair of Figure 3 with the other hand, hinted drawn stock rail. and

Fig. 6

in a very schematic part-longitudinal section of the slide chair of Fig. 4 with a contrast hintuously marked stock rail.

An illustrated in Figs. 1 and 2 slide chair 1 is mounted on a base plate or Base plate 2 arranged in the usual way by screws or the like is fastened on a threshold. Left on the base plate 2 is located a rib 3, against which the outer end of a rail foot 4th a stock rail 5 (see Fig. 5 and 6) applies and on this side with a Not shown clamping device is pressed against the base plate 2.

The inner rail 4 of the stock rail 5 is included of the sliding chair 1, on which a not shown and against the stock rail. 5 adjustable switch blade is arranged slidably mounted. For this is the Slide chair 1 at its inner, the stock rail 5 end facing with a via the inner rail foot 4 of the stock rail 5 (compare FIGS and 6) extending cantilever 6 and on the one hand one of the slide chair 1 and on the other hand the base plate 2 limited, over the entire length of the Sliding chair 1 extending recess 7 provided. In the recess 7 is a in Fig. 2 very schematically indicated, in the embodiment in the form of a Clamp 8 trained clamping element used, with a loop 9 of the tension bow 8 near the end region of the recess 7 on the inner Part of the rail foot 4 of the stock rail 5 slips. On the other hand, the free ends of the two bracket legs 10a, 10b in the recess 7 of the Slide chair locked (not shown). The slide chair 1 points for the clamping element or the clamping bracket 8 also serving the overload protection abutment 11, 12, which are arranged extending over the width of the recess 7, as well as in the embodiment of FIGS. 3 and 4 also end-side auxiliary abutment 13th

The sliding chair 1 is still with a very far upstream, namely outside of the stable frame in the region of the cantilever 6 arranged abutment 14th (see Fig. 1), against which the front end of the clamping means, i. in the Embodiment, the loop 9 of the tension bracket 8 (see Fig. 2) applies. To the variants shown in Figs. 3 and 4, the abutment consists of two separate abutments diametrically and flush with each other 15a, 15b and 16a, 16b, wherein according to Fig. 3, the abutments 15a, 15b left and right next to the recess 7 on the underside of the cantilever 6 and according to Fig. 4, the abutment 16a, 16b in the of the loop 9 of the tension bracket 8 (see. Fig. 2) overlapped area, i. E. approximated to FIG. 3, are arranged extending from the cantilever 6 into the recess 7.

In both cases, the abutments 15a, 15b and 16a, 16b for optimized manufacturing technology Processing, e.g. by milling, freely accessible, bringing itself achieve a precise overload path for the clamping element or the clamping bracket 8 leaves. This applies equally to the optimized shaping of the transition from the base plate 2 to the sliding chair 1 or to its cantilever 6, namely with the largest possible radius 17, as indicated in FIGS. 1 and 5 and 6, let execute.

The outside of the stable frame in the region of the cantilever 6 arranged Abutment 14 or 15a, 15b and 16a, 16b shortens the spring travel of the clamping element 8 and helps to permanently eliminate overuse. This equally and regardless of whether the abutments 15a, 15b a stop above the loop 9 of the tension bracket 8 or the abutment 16a, 16b provide outside the loop 9 above the tension bow 8. Always a reinforced overload protection for clamp or the like Clamping elements in tongue devices of railway turnouts for breaking ensured when occurring high horizontal forces.

Claims (5)

1. A device for securing rails (5) particularly stock rails in a points, including an underlay or base plate (2) for the rail with a slide chair (1) arranged thereon for a switch blade, wherein the slide chair (1) is furnished with a recess (7) extending over the rail foot (4) to accommodate a brace stirrup (8) of a clamp plate or similar, and at least one counter bearing extending the full width of the recess (7), and is constructed as a cantilever (6) at the end thereof that protrudes over the end of the rail foot,
   characterised in that
   the cantilever (6) is provided above the end of the rail foot (4) of the rail (5) with a counter bearing (14; 15a, 15b; 16a, 16b) that protrudes downwards out of the structure gauge of the cantilever (6).
2. The device as cited in claim 1,
   characterised by
   two counter bearings (15a, 15b; 16a, 16b) arranged diametrically offset from one another.
3. The device as cited in claim 2,
   characterised in that
   the counter bearings (15a, 15b) are arranged on the left and the right of the recess (7) on the underside of the cantilever (6).
4. The device as cited in claim 2,
   characterised in that
   the counter bearings (16a, 16b) are arranged in the recess (7) of the slide chair (1) in the area of a loop (9) formed by legs (10a, 10b) of a brace stirrup (8).
5. The device as cited in any of claims 1 to 4,
   characterised in that
   the transition between underlay panel (2) and cantilever (6) of the slide chair (1) is designed with a large radius (17).

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