EP1749937B1 - Covering for protection of switches - Google Patents

Description

The invention relates to a cover for arranged in or above a trough threshold drive, closure and / or Prüfergestänge a points drive.

Trough sleepers are particularly well suited for the protected installation of drive, lock and / or tester linkages of a point machine. A cover for such parts of a points drive is for example the NL 1014443 refer to. In this embodiment, the trough threshold in the central region is covered by a plate, wherein openings are provided in an elastic part in the area in which drive or Prüfergestänge are connected to movable switch parts. Such a design is naturally mechanically resilient only to a small extent, in particular in the course of track maintenance work, such as Gleisstopfarbeiten, the directly associated with the movable rail or switch parts of the linkage is insufficiently protected.

In order to better protect sensitive parts of the boom and in particular sub-areas in which such linkage cranked or angled, it is from the NL 1017746 C already known to set a tunnel-like metal box on the trough threshold, from which connecting rods are led out laterally to the movable switch parts or rails. In such lateral areas such training is protected against mechanical influences in any way, with a cover against icing and contamination in the sensitive areas of the connection to movable rail parts is not provided here.

The DE 19623286 A shows and describes an embodiment in which telescopically displaceable plates are provided relative to each other, which can be brought up to close to the rail of a stock rail, whereby at least an improved seal against in these areas Dust, ice od. Like. Is achieved. Since the lid construction provides a plurality of telescopically slidable plates and such plates can not be made arbitrarily thick to ensure undisturbed operation, the mechanical load capacity is naturally limited in such a configuration, wherein the plurality of gaps between adjacent sliding flat plates The risk of trituration and clamping of dirt, small rock and in particular the risk of icing can not be dismissed out of hand.

The invention now aims to provide a cover of the type mentioned above, which ensures a high degree of reliability while the most complete coverage possible critical portions, such as the connection to movable switch or rail parts, while the mechanical strength is improved and avoids the risk of blockage due to the ingress of fine dust or icing. In particular, the training according to the invention aims to ensure reliable protection of sensitive parts of the point setting system, even in the case of rough loads from track tamping systems.

To achieve this object, the cover according to the invention essentially consists in providing a central tunnel-shaped lid open to the trough threshold with a substantially U-shaped cross-section, the axial length of which is dimensioned in the direction of the trough threshold such that a collision with displaceable switch parts, in particular tongues , Is avoided, and that with sliding switch parts in the direction of the same coupled cover caps are provided which engage the central tunnel-shaped cover over or under and are guided on this slidably.

Due to the fact that a middle tunnel-shaped cover open to the trough surface is provided, a high degree of stability is initially ensured on account of the profile shape or the tunnel construction, whereby the essentially U-shaped cross section can be formed such that the width of the threshold does not touch any one Point is exceeded in order to ensure a secure support of the U-profile on the trough threshold while ensuring that collisions are avoided with Stopfarmen in a Nachstopfvorgang. In addition to this central, substantially U-shaped cross-section having tunnel-shaped lid whose axial length must be dimensioned in the direction of the trough threshold naturally so that a collision with the sliding switch parts can be ruled out with certainty, are now each side with the sliding switch parts respectively provided in the direction of displacement cover caps, whose axial length is chosen to be larger than the maximum adjustment of the switch parts to ensure a secure support on the central tunnel-shaped lid, wherein the formation is made such that the central tunnel-shaped lid is overlapped by the side covers and the caps are guided on the middle part. Such a construction is thus characterized by a particularly good protection of the sensitive connection points to the movable switch parts and also by a high degree of stability, the tunnel-like construction not only provides improved protection against mechanical influences but also against falling rock. The fact that condensation or rainwater can escape laterally at temperatures around freezing also reduces the risk of icing.

Advantageously, the inventive construction is made in this case so that the central tunnel-shaped cover is convex or polygonal in cross-section outwards and is supported with two substantially normal to the trough threshold extending free legs on the trough threshold. Such a design increases the mechanical rigidity and stability.

In order to ensure a correspondingly low-friction guidance training is advantageously made so that the central tunnel-shaped lid carries on its free legs outside guide profiles, which cross-over with corresponding inner guide profiles of the central tunnel-shaped lid cooperate side covers. For reasons of stability, the central tunnel-shaped lid may preferably be formed of metal, wherein it is quite sufficient if the lateral cover caps are made of impact-resistant plastic.

The relatively short-built side caps must therefore be formed only from suitably impact-resistant plastic to ensure the necessary mechanical strength, at the same time the choice of a corresponding plastic significantly reduces the risk of icing.

Advantageously, the training is such that the lateral caps wear transversely to the axis of the tunnel or the trough threshold elongated holes, such slots having carriers or grooves, in which connected to the movable rail parts coupling members or bolts can dive, so as to ensure that with a pivoting of switch parts, such as, for example, of tongue rails, a corresponding movement compensation relative to the cover, which are only moved straight, is guaranteed. The slots can in this case in the cap itself, in a cap connected to the support, which may be, for example, pivotally fixed to the cap, or only be formed as grooves, in which case the coupling members only engage in the grooves and not as in the case of slots can prevail.

In particular, the formation of grooves allows immediate coverage beyond the area of the connection to the movable point or crossing parts and in particular the movable tongue rails addition. Alternatively, such a further protection can be achieved by covering the oblong holes of parts of the lateral covering caps with the material of the covering caps.

Especially in the field of tongue rails, the points drive is usually set in or on trough sleepers, which also carry base plates and a corresponding slide chair. To ensure here as possible in the course of the adjustment and the side as possible a sealing conclusion is advantageously made the training so that the free legs of the side covers are graded in height and adapted to each used underlay plates and / or Gleitstühle.

• Fig.1 eine Draufsicht auf eine Trogschwelle mit der erfindungsgemäßen Ausbildung der Abdeckung,
• Fig.2 eine Seitenansicht in Richtung des Pfeils II der Fig.1 teilweise im Schnitt,
• Fig.3 einen Schnitt entsprechend der Linie III/III der Fig.2 durch die Abdeckung und die Trogschwelle, wobei der Übersichtlichkeit halber Weichenantriebsteile nicht dargestellt sind,
• Fig.4 ein Detail des Anschlusses der seitlichen Abdeckkappen an eine Zungenschiene,
• Fig.5 eine abgewandelte Ausbildung in analoger Darstellung wie Fig.4 und
• Fig.6 eine weitere abgewandelte Ausbildung des Anschlusses der seitlichen Abdeckkappen an den Weichenantrieb und die Zungenschiene einer Weiche.

The invention will be explained in more detail with reference to embodiments shown schematically in the drawing. In this show:

• Fig.1 a top view of a trough threshold with the inventive design of the cover,
• Fig.2 a side view in the direction of arrow II of Fig.1 partly in section,
• Figure 3 a section corresponding to the line III / III of Fig.2 through the cover and the trough threshold, wherein for the sake of clarity turnout drive parts are not shown,
• Figure 4 a detail of the connection of the lateral cover caps to a tongue rail,
• Figure 5 a modified training in analog representation as Figure 4 and
• Figure 6 a further modified embodiment of the connection of the lateral caps on the points drive and the tongue rail of a switch.

In Fig.1 is a multi-part cover visible, which has a central to the trough threshold 1 open tunnel-shaped cover 2 with a substantially U-shaped cross-section. The tunnel-shaped cover 2 is encompassed by two lateral cover caps 3, these cover caps carry elongated holes 4, in which associated with tongue rails 5 and thus movable switch parts actuators are engaged. The elongated holes 4 allow a corresponding compensating movement of bolts or pins in an expansion and displacement of the tongue rails 5 in the direction of the double arrow 6 to corresponding jaw rails. 7

In the presentation after Fig.2 are laterally arranged at the middle downwardly open tunnel-shaped cover 2 guides 8 can be seen on which the side covers 3 are guided in the direction of the double arrow 9 slidably. The entrainment of the side covers with the sliding movement of the tongue rails 5 is ensured here by pins 10, which the in Fig.1 enforce long slots 4. When displayed in Fig.2 is also apparent that the lower edge of the lateral legs of the side covers 3 is stepped, so as to encompass as completely as possible base plates 11 and Gleitstühle 12 in the adjacent positions, so that a high degree of sealing is ensured laterally and unhindered Moving the cover 3 together with the tongue rails 5 is made possible.

From the illustration to Figure 3 It can be seen that the inner middle part of the downwardly or to trough threshold 1 open tunnel-shaped cover 2 can be formed of relatively thin-walled metal and ensures a high degree of mechanical stability by its domed or roof-shaped structure. The side covers 3 embrace this middle open to the trough threshold tunnel-shaped cover 2 and there are the guides 8 can be seen, which cooperate with corresponding counter-profile in the side covers 3. The guide rails 8 are dimensioned in their length so that the lateral sliding covers can be inserted in a simple manner, the fixed middle part of the tunnel-shaped cover can be clamped on the trough threshold and secured in a simple manner, for example with a lock against disassembly can. The overall substantially trapezoidal cross section does not surmount the clearance space for the Stopfarme, which can be used with appropriate inclination even without collision with such a lid for use.

In Figure 4 is the coupling of the point mechanism to the side covers 3, as they are already in Fig.1 and 2 was apparent, shown in detail. The drive linkage 13 carries a pin 10, which is connected to the tongue rail 5 directly via a schematically indicated with 15 coupling member. The cap 3 itself carries a pivoting plate 16 with the in Fig.1 and 2 already apparent slot 4, so that after placing the cap 3 and pushing the cap 3 on the guides 8 of the central region by simply pivoting this plate-shaped member 16 of the pin 10 engages directly into the slot 4 and in the way at its adjusting movement in the direction of the double arrow 9, the cap 3 moves accordingly.

In the presentation after Figure 5 and 6 Deviating figures are made in which a connected to the cap 3 flexible extension 17, the area of the coupling to the tongue rail 5 further covers and represents an extended protection in the way. In the presentation after Figure 5 engages the upward-pointing pin 10 of the switch rod 13 in a groove 18 and causes in this way the entrainment of the cap 3. In the illustration after Figure 6 the cap 3 carries a corresponding pin 19, which in turn is itself connected to a slot in a plate-shaped intermediate member 14 which acts on the upwardly directed pin 10 of the point linkage 13. Overall, this is thus a kind of kinematic reversal, in which the slot 4 is housed in a part carried by pin 10 part. With regard to the admissibility of a game in the movement of the side covers 3 but the plate 14 may be formed with round holes and ensure a pivoting of the tongue rail 5 according to a compensation by pivoting relative to the axis of the pin 10 to the linear entrainment of the cover 3 to allow.

The displaceable cover member 3 is plugged in all cases on the respective pin 10 and flange of the linkage.

Overall, the greatest possible coverage in critical areas is ensured, so that no foreign bodies can get into the area of the attack pieces or the drive.

Claims (8)

1. Cover for driving-, locking- and/or checking rods of a switch drive to be arranged in or on a trough sleeper, characterised in that a central tunnel-shaped cap (2) having a substantially U-shaped cross section is provided, which is open towards the trough sleeper (1), the axial length of which in direction of the trough sleeper (1) is dimensioned such that a collision with movable switch parts, in particular tongue rails (5), is prevented and that cover caps (3) are provided, coupled with movable switch parts in switching direction of the same, which embrace the central tunnel-shaped cap (2) from above or below and are moveably guided on the same.
2. Cover according to claim 1, characterised in that the central tunnel-shaped cap (2) is convexly or polygonally shaped in cross-section towards the outside and is propable on the trough sleeper (1) with two free legs running substantially perpendicular to the trough sleeper (1).
3. Cover according to claim 1 or 2, characterised in that the central tunnel-shaped cap (2) is carrying guide profiles (8) externally on its free legs, which guide profiles (8) cooperate with corresponding internal guide profiles of the lateral cover caps (3) embracing the tunnel-shaped cap (2) from above.
4. Cover according to claim 1, 2 or 3, characterised in that the central tunnel-shaped cap (2) is made of metal.
5. Cover according to any one of claims 1 to 4, characterised in that the lateral cover caps (3) are made of impact-resistant plastics.
6. Cover according to any one of claims 1 to 4, characterised in that the lateral cover caps (3) carry elongated holes (4) extending transversal to the axis of the tunnel (2) or the trough sleeper (1) respectively, carriers (14, 16) comprising such elongated holes (4) or grooves (18), in which coupling members or bolts (10) connected with the movable switch parts can immerse.
7. Cover according to claim 6, characterised in that the elongated holes (4) are covered by parts of the lateral cover caps (3) by material of the cover caps (3).
8. Cover according to any one of claims 1 to 7, characterised in that the free legs of the lateral cover caps (3) are gradated in height and are adjusted to the baseplate (11) and/or slide chair (12) used in each case.

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