EP1413677A2 - 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 jaw rails in a switch, consisting of a base plate for the rail with a sliding chair arranged thereon for a switch tongue, wherein the slide chair extends up to over the rail foot recess for receiving a Clamp, a clamping plate or the like and at least one extending over the width of the recess abutment and is formed at its end over the rail foot as a cantilever.

Such serving both for the inner shoe rail mounting and the inner rail mounting in switches device has become known from DE 32 30 612 A1. It is equipped with an elastic overload or tilt protection, which should prevent both fractures of the usually zweischkligen clamping means, in particular clamping bracket, as well as breaks on the base plates, regardless of whether these are made of parts in welded construction or in one piece from cast or forged parts , The base of the rail carries a slide for the switch blades and a clamping plate attachment on the outside of the rail foot. In a reaching over the inside of the rail foot recess of the sliding chair for holding down the rail foot, a substantially U-shaped spring clip on the sliding chair side can be inserted. The free ends of the legs of the spring clip are secured in the tensioned state of the spring clip by a latching connection with formations of the sliding chair.

In the area of the recess is located on the underside of the slide chair a hump-like shape, which acts as an abutment for the tensioned spring clip. In front of the rail foot on the underside of the slide chair as abutment another humpback-like shape is provided, which at normal tension of the tension bracket has a slight play against the top of the tension bracket, which is overcome in tilting the rail to form a shortened lever arm on the spring clip.

Above all, higher axle loads and increased speeds of the railway trains lead to greater forces being transmitted to the rails via the wheels. In a normal track, the horizontal forces arising from the wheel flanges of the wheels are superimposed by the vertical forces arising from the wheel, so that tilting of the rails usually can not occur or is reliably prevented by the hold-down force on both sides of the rail arranged fasteners. Although in a curved track on the outer rail of the track already act increased transverse forces, but also here usually do not lead to tilting of the stock rail by the simultaneous vertical forces of the wheel load.

The ratio of the vertical forces to the horizontal forces in the tongue device of a switch, in particular in the branching strand, is quite different. In addition to the increased horizontal forces occurring in the arc run, the wheel changes from the stock rail through the adjacent tongue at approximately the middle of the tongue device on the curved, branching tongue over. This eliminates the vertical forces on the stock rail from this point, so that the occurring vertical and horizontal forces must be absorbed or transmitted solely by the tongue rail. The tongue rail is here on numerous thresholds unpaved on the Gleitstuhlplatten. The horizontal forces in this branching strand of the track are still very high and are exclusively transmitted to the stock rail via support struts which are bolted to the web of the stock rail. However, since there are no vertical forces on the stock rail in this area, the horizontal forces have a full effect on the upper part of the web of the stock rail and lead to tilting of the stock rail.

In order to prevent this tilting, it is known to provide hold-down devices, in particular on the inside of the shoe rail foot. Here, as well as for high speeds and large axle loads suitable hold-down device for the inside of the stock rail, the so-called internal stock rail bracing (IBAV) has proven (see, eg DE-AS 20 00 482, DE-PS 21 53 534, DE-AS 24 09 138 ). These have in the sliding chair on the inside clamping bracket, which have a overload protection, which is able to absorb in the continuous load caused by the tilting of the stock rail Abhebekräfte to 20 KN, without causing overstressing of the clamping bracket or for striking the rail on the cantilever Sliding chair leads. However, it has been shown that relaxations of the Gleitstühle and / or Spannbügel- and plate fractures are not ruled out at present even higher forces.

The invention is therefore an object of the invention to provide a generic device that withstands even the highest loads.

This object is achieved in that the cantilever is provided above the Schienenfußendes the rail with a protruding down from the light profile of the cantilever abutment. The on the slide or its cantilever immediately in the production with cast or forged abutment makes it possible to narrow the dimensional tolerances for lifting the rail foot by machining with high accuracy. Furthermore, it was recognized that a far upstream, namely arranged in the region of the cantilever abutment the momentum and travel of the clamping element shortened and permanently overstressing of the clamping element (clamp or the like) safely excludes.

According to an advantageous embodiment of the invention, two diametrically spaced abutments can be provided in this case. According to embodiments of the invention, the two mutually aligned abutment can be arranged left and right next to the recess on the underside of the cantilever arm or alternatively in the region of a loop formed by legs of a tensioning bracket in the recess of the sliding chair. The two-part thus abutment thus can be mounted in an area of the sliding chair, which is freely accessible with, for example, form milling, so that a precise overload path for the clamping element can be achieved by a corresponding precise machining of the stops.

According to a further proposal of the invention, the transition between the base plate and cantilever of the sliding chair is preferably formed with a large radius. This can be favored that despite the overload protection abutment under the cantilever and thus outside of the stable frame when hitting the rail of the abutment or the Kragarmes still no increased stresses (notch stresses), which lead to breakage of the clamping elements or to cancel the cantilever could. For a maximum transition radius and thus an 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, renders harmless the stresses that occur due to the high forces. The unobstructed accessibility here again allows 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. 1

in a partial side view of a slide arranged on a base plate or base, 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 disposed on a base plate or base plate 2, which is fastened in a conventional manner by screws or the like on a threshold. On the left of the base plate 2 is a rib 3, against which the outer end of a rail foot 4 of a stock rail 5 (cf., FIGS. 5 and 6) abuts and is pressed against the base plate 2 on this side by a clamping device (not shown).

The inner rail 4 of the stock rail 5 is mounted with the inclusion of the sliding chair 1, on which a not shown and engageable against the stock rail 5 switch blade is slidably mounted. For this is the Slide chair 1 at its inner end facing the stock rail 5 with a cantilever arm 6 extending over the inner rail foot 4 of the stock rail 5 (cf., FIGS. 5 and 6) and, on the one hand, one bounded by the slide chair 1 and, on the other hand, the base plate 2 the entire length of the slide chair 1 extending recess 7 is provided. In the recess 7, a very schematically indicated in Fig. 2, in the embodiment in the form of a clamping bracket 8 formed clamping element is used, wherein a loop 9 of the clamping bracket 8 slides close to the end portion of the recess 7 on the inner part of the rail foot 4 of the stock rail 5. By contrast, the free ends of the two bar arms 10a, 10b are latched in the recess 7 of the sliding chair (not shown). The slide chair 1 has for the clamping element or the clamping bracket 8 also the overload protection serving abutment 11, 12, which are arranged to extend over the width of the recess 7, and in the embodiment of FIGS. 3 and 4 also end-side auxiliary abutment thirteenth ,

The slide chair 1 is further provided with a very far abutment 14, which is arranged outside the stable frame in the region of the cantilever 6 (see Fig. 1), against which the front end of the tensioning means, i. in the embodiment, the loop 9 of the tension bracket 8 (see Fig. 2) applies. According to the variants shown in Figs. 3 and 4, the abutment consists of two separate, diametrically and in alignment opposite abutments 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 abutments 16a, 16b in the area covered by the loop 9 of the tension bow 8 (see Fig. 2) overlapped area, ie compared with 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 processing, eg by milling, freely accessible, bringing itself can achieve a precise overload path for the clamping element or the clamping bracket 8. This applies equally to the optimized shaping of the transition from the base plate 2 to the slide chair 1 or to its cantilever arm 6, which can namely be executed with the largest possible radius 17, as indicated in FIGS. 1 and 5 and 6.

The abutment 14 or 15a, 15b or 16a, 16b arranged outside the stable frame in the region of the cantilever arm 6 shortens the spring travel of the tensioning element 8 and contributes to reliably permanently avoiding overstressing. This is equally and regardless of whether the abutments 15a, 15b provide a stop above the loop 9 of the tension bow 8 or the abutment 16a, 16b 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 protection is ensured at high horizontal forces.

Claims (5)

Device for fastening rails (5), in particular jaw rails in a switch, consisting of a base plate (2) for the rail with a slide chair (1) arranged thereon for a switch tongue, wherein the slide chair (1) extends until via the rail foot (4) extending recess (7) for receiving a tensioning bow (8), a clamping plate or the like and at least over the width of the recess (7) extending abutment and formed at its end the Schienenfußende cross-over as a cantilever (6) is
characterized,
in that the cantilever arm (6) above the rail foot end (4) of the rail (5) is provided with an abutment (14; 15a, 15b; 16a, 16b) protruding downwards from the light profile of the cantilever arm (6). Device according to claim 1,
marked by
two diametrically spaced abutment (15a, 15b, 16a, 16b). Device according to claim 2,
characterized,
that the abutments (15a, 15b) are arranged on the left and right of the recess (7) on the underside of the cantilever arm (6). Device according to claim 2,
characterized,
in that the abutments (16a, 16b) are arranged in the recess (7) of the sliding chair (1) in the region of a loop (9) formed by legs (10a, 10b) of a clamping bracket (8). Device according to one of claims 1 to 4,
characterized,
that the transition between base plate (2) and cantilever arm (6) of the slide chair (1) is formed with a large radius (17).

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