Fastening Point, In Which a Rail Forming Part of a Track for Rail Vehicles is Mounted on a Foundation

Abstract

A fastening point for a rail on a foundation including a bedplate arranged on a support surface of the foundation. The bedplate includes a bearing surface formed on its underside associated with the foundation and also a through-opening, a spring element for exerting an elastic holding-down force on a rail foot and a clamping screw, which braces the spring element against the bedplate. The clamping screw is guided with its threaded shaft through the through-opening of the bedplate. The clamping screw acts with its screw head against the spring element and is screwed into a thread provided in a region of the through-opening of the bedplate. A free space is provided in a region underneath the bedplate in the extension of the through-opening of the bedplate, into which the threaded shaft of the clamping screw can be inserted.

Claims

1. A fastening point, in which a rail forming part of a track for rail vehicles is fixed to a foundation, the fastening point comprising: a bedplate arranged on a support surface of the foundation, the bedplate comprising a support surface formed on an upper side of the bedplate associated with the rail, a bearing surface formed on an underside of the bedplate associated with the foundation, as well as a through-opening leading from the underside to the upper side of the bedplate, a spring element, which exerts an elastic holding-down force on the rail foot, and a clamping screw, which braces the spring element against the bedplate, wherein the clamping screw is guided with its threaded shaft through the through-opening of the bedplate, and wherein the clamping screw acts with its screw head against the spring element, the clamping screw is screwed with a thread section of its threaded shaft into a thread provided in a region of the through-opening of the bedplate, and a free space is provided in a region present in a direction of the foundation underneath the bedplate, in an extension of the through-opening of the bedplate, into which free space the threaded shaft of the clamping screw is adapted to be inserted via its free end.

2. The fastening point according to claim 1, wherein an intermediate plate elastic in a gravitational force direction is arranged between the bedplate and the foundation, in which is formed a recess arranged in alignment with the through-opening of the bedplate, which recess forms the free space into which the free end of the threaded shaft of the clamping screw is adapted to be inserted.

3. The fastening point according to claim 2, wherein the recess is formed as a through-opening leading from the underside of the intermediate plate associated with the foundation to its upper side associated with the bedplate.

4. The fastening point according to claim 1, wherein a recess is formed in the support surface of the foundation, which is arranged in alignment with the through-opening of the bedplate and forms the free space into which the free end of the threaded shaft of the clamping screw is adapted to be introduced.

5. The fastening point according to claim 1, wherein a support plate sits on the support surface of the foundation, on which support plate the bedplate is supported.

6. The fastening point according to claim 5, wherein the support plate with a projection formed on its underside associated with the foundation sits in the recess formed in the foundation, and wherein in the support plate a recess is formed starting from its upper side associated with the bedplate in a region of the projection, which recess is arranged in alignment with the through-opening of the bedplate and into which the free end of the threaded shaft of the clamping screw is adapted to be introduced.

7. The fastening point according to claim 1, wherein the thread provided in the region of the through-opening of the bedplate associated with the clamping screw is provided by a nut, which is arranged on the underside of the bedplate.

8. The fastening point according to claim 7, wherein a nut receptacle is formed in the underside of the bedplate in the region of its through-opening associated with the clamping screw, in which the nut is held in a rotation-proof manner with respect to a longitudinal axis of the clamping screw.

9. The fastening point according to claim 1, wherein the bedplate comprises at least one further through-opening leading from its underside to its upper side, through which is guided a fastening element fixed to the foundation, such that the bedplate is fixed in a positive engagement manner in a longitudinal direction of the rail and in a transverse direction aligned transverse to the longitudinal direction of the rail and parallel to the support surface of the foundation, and fixed displaceably in a height direction aligned normal to the support surface of the foundation.

10. The fastening point according to claim 9, wherein a stop element is provided, which forms a stop that limits the maximum travel of the bedplate in the height direction.

11. The fastening point according to claim 9, wherein the fastening element is a screw, which for the fixing is screwed into a dowel recessed in the foundation.

12. The fastening point according to claim 1, wherein the bedplate comprises a plastic material.

13. The fastening point according to claim 1, wherein a wedge plate is arranged between the rail foot and the support surface of the bedplate, the wedge plate comprising a bearing surface associated with the support surface and a support surface associated with the rail, on which the rail foot is supported, and that the support surface and the bearing surface enclose an acute angle in a cross-section transverse to a longitudinal extension of the rail.

14. The fastening point according to claim 13, wherein the wedge plate is fixed by positive engagement between two shoulders formed on the upper side of the bedplate, referred to the transverse direction and the longitudinal direction, but is displaceable in the height direction.

15. The fastening point according to claim 14, wherein the wedge plate is replaceable.

Description

[0035] The invention is described in more detail hereinafter with the aid of a drawing illustrating an exemplary embodiment, in which the figures show respectively schematically:

[0036] FIG. 1 a fastening point for a rail in a perspective view from above;

[0037] FIG. 2 the fastening point in a section along the sectional line X-X illustrated in FIG. 1 transverse to the longitudinal extension of the rail.

[0038] The fastening point 1 for fastening a rail 2 to a fixed foundation U formed for example by a cast concrete sleeper or plate comprises a bedplate 3, which is fabricated from a fibre-reinforced plastic for example that is normally used for this purpose.

[0039] The bedplate 3 formed as one piece has at its free upper side 4 a centrally arranged flat support surface 5 and on its underside 6 associated with the foundation, a likewise flat bearing surface 7.

[0040] At the side the support surface 5 is in each case bounded by a shoulder 8, 9, which seen in plan view has a curved shape in the direction of the rail 2. A projection 10 is formed on the vertices of the shoulders 8, 9, extending in each case over the height of the shoulders 8, 9.

[0041] A wedge plate 11 is arranged between the thereby formed shoulders 8, 9 in such a way that it is height adjustable in a height direction H aligned normal to the flat support surface 12 formed on the free upper side of the foundation U, but is fixed in a positive engagement manner in the longitudinal direction L of the rail 2 and in the transverse direction Q aligned transverse thereto and parallel to the support surface 12.

[0042] The wedge plate 11 sits with its bearing surface 13 on a height compensation plate 14, which is laid on the support surface 5 of the bedplate 3.

[0043] The rail 2 stands on the other hand with its rail foot 15 on the flat support surface 16 of the wedge plate 11 associated with the rail foot. The support surface 16 encloses with the bearing surface 13 of the wedge plate 11 an acute angle of a few degrees, so that the rail 2 is aligned at a correspondingly large defined angle of inclination with respect to the support surface 12 of the foundation U.

[0044] The shoulders 8, 9 form a recess, into which the wedge plate 11 can be releasably inserted coming from the height direction H. This enables by simple replacement wedge plates 11 that differ by the angles of inclination between their bearing surface 13 and their support 16 or by the width of their support surface, to be mounted on the bedplate 3.

[0045] The position of the rail 2 on the support surface 16 of the wedge plate 11 is in this connection fixed by adaptor pieces 17, 18, which are arranged between the respective longitudinal edge of the rail foot 15 and a shoulder 19, 20 of the wedge plate 11 laterally delimiting the respective wedge plate 11.

[0046] Two through-openings 21, 22 are formed in the support surface 5 of the bedplate 3 in each case laterally of the rail foot 15, the openings leading from the upper side 4 to the underside 6 of the bedplate 3. The through-openings 21, 22 terminate at the underside 6 of the bedplate 3 in nut receptacles 23, 24 additionally formed there. Correspondingly arranged through-openings are formed in the shoulders 19, 20 of the wedge plate 11.

[0047] Nuts 25, 26 sit in the nut receptacles 23, 24. Conventionally formed clamping screws 27, 28 are screwed into the nuts 25, 26 via the threaded section of their respective threaded shaft 29, 30. The clamping screws 27, 28 are in this connection guided from the upper side 4 of the bedplate 3 through the respective through-opening of the wedge plate 11 and the respective through-opening 21, 22 of the bedplate 3.

[0048] The nut receptacles 23, 24 are formed in a manner known per se, so that the nuts 25, 26 are held in a rotation-proof manner in relation to the longitudinal axis about which the clamping screws 27, 28 are turned when they are screwed into the nuts 25, 26. At the same time the depth of the nut receptacles 23, 24 is dimensioned so that the nuts 25, 26 with their side associated with the foundation U are aligned flush with the underside 6 of the bedplate 3.

[0049] The clamping screws 27, 28 act with their screw head 31, 32 on the middle hoop 33 respectively of a conventionally designed, co-formed tension clamp 34, 35, which are supported with the free ends of their holding arms 36, 37 on the side respectively associated with them of the rail foot 15, and there exert an elastic holding-down force.

[0050] An elastic intermediate plate 38 is arranged between the foundation U and the bedplate 3, which extends over the width and length of the bedplate 3. In the region of the through-openings 21, 22 of the bedplate 3 recesses 39, 40 formed as through-openings are made in the intermediate plate 38, the dimensions of the recesses being so that the threaded shaft 29, 30 of the respective clamping screw 27, 28 can be inserted with a degree of play through the recesses 39, 40.

[0051] The intermediate plate 38 sits on a support plate 41, whose width and length are dimensioned so that it extends with an edge region beyond the width and length of the intermediate plate 38.

[0052] Pot-shaped projections 42, 43 are formed on the support plate 41, which project in the direction of the foundation U and surround recesses 44, 45 in the direction of the bedplate 3. The recesses 44, 45 are aligned in alignment with the through-openings 21, 22 and with the recesses 39, 40, and are dimensioned so that the free ends of the threaded shafts 29, 30 of the clamping screws 27, 28 can also be introduced loosely into them with a degree of play.

[0053] The projections 42, 43 are fitted into the foundation U and are surrounded by the material of the foundation U and also form recesses there, in which the projections 42, 43 sit in a positive engagement manner. The recesses 44, 45 form in this way free spaces for the movement of the clamping screws 27, 28 that takes place in the direction of the foundation U when the clamping screws are screwed into the nuts 25, 26.

[0054] The positional fixing of the bedplate 3, moveable in the height direction H but immovable in the longitudinal direction L and transverse direction Q, takes place in a manner known per se from DE 10 2009 041 848 A1 by means of fastening screws 46, 47, which are guided through through-openings formed in the side end sections of the bedplate 3, the intermediate plate 38 and the support plate 41, and are screwed into plastic dowels 48, 49 which are embedded in the foundation U.

[0055] The fastening screws 46, 47 are guided in stop elements 50, 51 formed in the manner of a sleeve, which are inserted through the respective through-openings of the bedplate 3 and of the intermediate plate 11 and stand on the support plate 41. The stop elements 50, 51 have at their upper edge, on which the head of the respective fastening screw 46, 47 is supported, a radially projecting, surrounding collar 52, which forms a stop means for the movement of the bedplate 3 in the height direction H. By means of the stop elements 50, 51, an eccentric adjustment can be accomplished as already described in DE 10 2009 041 848 A1, so to adjust the position of the bedplate 3 in the longitudinal direction L and transverse direction Q.

[0056] In the pre-installed state illustrated in FIG. 2 on the side to the right of the rail 2, the clamping screw 28 is screwed with the threaded section of its threaded shaft 47 into the nut 26 until the free end of the threaded shaft 47 reaches the recess 40 of the intermediate plate 38. The tension clamp 35 is in this state only slightly braced, its middle hoop still standing inclined upwardly.

[0057] For the finished installation the tension clamp 35 is displaced in the direction of the rail 2, until the free end of its holding arms sits on the associated side of the rail foot 15. The clamping screw 30 is then tightened, so that its middle hoop is swivelled in the direction of the foundation U, until it reaches its end position and the required holding-down force is exerted by the tension clamp 35 on the rail foot 15. In the course of the tightening the clamping screw 30 penetrates further with its free threaded shaft ends into the associated recess 45, before the end position is reached, which is shown in FIG. 2 on the side to the left of the rail 2 for the tension clamp 34 and the clamping screws 27.

LIST OF REFERENCE NUMERALS

[0058] 1 Fastening point for the fastening [0059] 2 Rail [0060] 3 Bedplate [0061] 4 Free upper side of the bedplate 3 [0062] 5 Flat support surface of the bedplate 3 [0063] 6 Underside of the bedplate 3 [0064] 7 Bearing surface of the bedplate 3 [0065] 8,9 Shoulders of the bedplate 3 [0066] 10 Projection [0067] 11 Wedge plate [0068] 12 Support surface of the foundation U [0069] 13 Bearing surface of the wedge plate 11 [0070] 14 Height compensation plate [0071] 15 Rail foot [0072] 16 Support surface of the wedge plate 11 [0073] 17,18 Adaptor strips [0074] 19,20 Shoulders of the wedge plate 11 [0075] 21,22 Through-openings of the bedplate 3 [0076] 23,24 Nut receptacles [0077] 25,26 Nuts (with provided threads) [0078] 27,28 Clamping screws [0079] 29,30 Threaded shaft of the clamping screws 27, 28 [0080] 31,32 Screw head of the clamping screws 27, 28 [0081] 33 Respective middle hoops of the tension clamps 34,35 [0082] 34,35 Tension clamps (spring element) [0083] 36,37 Holding arms of the tension clamps 34, 35 [0084] 38 Intermediate plate [0085] 39,40 Recesses of the intermediate plate 38 [0086] 41 Support plate [0087] 42,43 Projections of the support plate 41 [0088] 44,45 Recesses of the support plate 41 (free spaces) [0089] 46,47 Fastening screws [0090] 48,49 Plastic dowels [0091] 50,51 Stop elements [0092] 52 Surrounding collar of the stop element 50, 51 [0093] H Height direction [0094] L Longitudinal direction of the rail 2 [0095] Q Transverse direction [0096] U Foundation