RAIL-MOUNTING ASSEMBLY

Abstract

An assembly for securing a longitudinally extending rail for rail vehicles has a metallic base plate detachably fixed to a solid substrate. Rail holddowns secure the rail to the base plate, and retaining devices anchored in the substrate and pressing the base plate down against the base plate.

Claims

1. An assembly for securing a longitudinally extending rail for rail vehicles, the assembly comprising: a metallic base plate detachably fixed to a solid substrate; rail holddowns securing the rail to the base plate; and retaining devices anchored in the substrate and pressing the base plate down against the base plate.

2. The assembly defined in claim 1, wherein the retaining devices each include a respective frame member having a lower face bearing directly on the substrate.

3. The assembly defined in claim 2, wherein the retaining devices each include an anchor element passing through the respective frame member.

4. The assembly defined in claim 3, wherein the retaining devices each include an elastically compressible tightening clip compressed vertically between the anchor element and the base plate and pressing the base plate down against the substrate.

5. The assembly defined in claim 2, wherein the frame member is transversely and longitudinally braced against the base plate.

6. The assembly defined in claim 2, wherein each retaining device includes an angle guide plate for supporting the respective holddown clip.

7. The assembly defined in claim 6, further comprising: a respective spacer plate for vertical height adjustment is provided underneath each angle guide plate.

8. The assembly defined in claim 1, further comprising: a spacer plate for vertical height adjustment of the base plate underneath the base plate.

9. The assembly defined in claim 1, further comprising: for damping purposes at least one intermediate plate of a low-stiffness material underneath the base plate.

10. The assembly defined in claim 1, wherein the base plate is imperforate and not traversed by an element seated in the substrate.

11. The assembly defined in claim 1, wherein the substrate has a planar and uninterrupted surface beneath the base plate.

Description

BRIEF DESCRIPTION OF THE DRAWING

[0019] The above and other objects, features, and advantages will become more readily apparent from the following description, reference being made to the accompanying drawing in which:

[0020] FIG. 1 is a section through an assembly according to the invention,

[0021] FIG. 2 shows an exploded perspective view of the assembly of FIG. 1 and

[0022] FIG. 3 shows a perspective detail view of the assembly of FIG. 1.

SPECIFIC DESCRIPTION OF THE INVENTION

[0023] The assembly according to the invention comprises a rail base plate 1 for holding a rail 2. The base plate 1 is constructed as a steel casting.

[0024] The rail 2 extends, in the illustration according to FIG. 1, in a longitudinal direction perpendicular to the plane of the drawing view. A transverse direction extends horizontally in the plane of FIG. 1. The gravitational force of a rail vehicle acts in a height direction in turn perpendicular thereto, in which case transverse forces also arise in the transverse direction, for example during travel through bends.

[0025] In this case the rail 2 has a conventional profile and is located in the region of switch points, so that, in addition, a further rail 2′ adjustable transversely rests on the base plate 1.

[0026] In principle, an assembly according to the invention can also be used outside switch points and in a straight rail region. The exact shape of the base plate 1 can in that case be adapted to the particular use.

[0027] The base plate 1 is arranged on a concrete sleeper or substrate 3. In this case the substrate has a smooth surface without grooves or shoulders such as are usually provided in the prior art for resisting transverse forces. This allows economic and simple production of the substrate 3.

[0028] The rail 2 is fixed to the base plate 1 by rail holddowns 1a. In that case, the rail foot is pressed by standard holddown clips or clamp clips (not illustrated) against the base plate 1. Screws that may be used for fixing the rail 2 to the base plate 1 do not pass through the base plate 1 and are not anchored in the substrate 3, but are in fact screwed into the base plate 1.

[0029] An intermediate plate 4 of a material of low stiffness, in this case a plastic with a static stiffness of ≦200 kN/mm is provided between the base plate 1 and the substrate 3. This intermediate plate 4 serves for shock and sound decoupling between the rail 2 and substrate 3.

[0030] Moreover, an optional spacer plate 5 of metal is initially provided below the intermediate plate 4 so as to compensate for any height tolerances of the substrate that may be present. The spacer plate 4 can alternatively also consist of plastic.

[0031] The base plate 1 is fixed in position by two retaining devices 6. A respective such retaining device 6 is positioned on each side in flush abutment transversely in front of a transversely directed end face of the base plate 1. The base plate 1 is thus mechanically positively held transversely.

[0032] In addition, projecting arms 1b of the base plate 1 engage around, that is longitudinally to both sides of the retaining devices 6 so that a mechanically positively support in the longitudinal direction is also realized.

[0033] Vertically, the base plate is mechanically positively held by holddown clips 7 of the retaining devices 6 that are braced vertically by the retaining devices 6 down against the ends of the base plate 1 pressing it against the substrate 3 by a force defined by the holddown clips 7.

[0034] The retaining devices 6 each comprise a lower frame member 8 whose lower face is constructed as a defined pressure surface 8a that bears bon the upper face of the substrate 3.

[0035] The frame member 8 has a central hole 8b through which passes an anchor element 9 fixable in the substrate in usual manner and forming part of the retaining device 6. In this example the anchor element 9 is constructed as a bolt that is mechanically positively anchored in the substrate and that has a threaded head. Alternatively, the anchor element can also be constructed as, for example, a screw that is anchored in the substrate in an anchor sleeve.

[0036] The anchor element 9 also passes through an angle guide plate 10 above the frame member 8 and serves for defined guidance and support of the holddown clip 7, of the retaining device 6. The holddown clip 7 is constructed analogously to holddown clips conventionally used in rail substrate construction, wherein the precise shape, material strength and spring constant can be adapted according to the design of the base plate. With particular advantage, holddown clips can be used that correspond with a conventional standard.

[0037] An optional spacer plate 11 between the frame member 8 and the angle guide plate 10 that analogously to the function of the spacer plate 5 enables precise adaptation of height to compensate for tolerances. In the normal case, the spacer plate 11 can correspond in its thickness with the spacer plate 5, when one is used.

[0038] Nuts and washers 12 on the anchor element 9 press down on the holddown clip 7. In that case the holddown clip 7 is pressed down by them until in abutment with the angle guide plate 10. The pressing force of the frame member 8 on the substrate 3 can thereby be selected as desired through the tightening moment of the nut 12 without the pressing force of the base plate 1 being further increased.

[0039] Correspondingly, the base plate 1 can deflect vertically insofar as, due to vibrations or shocks, forces are reached that exceed the spring force of the holddown clip 7.

[0040] Transverse forces arising are sufficiently braced by the retaining devices 6 or frame members 8. For that purpose, the size of the pressure surface 8a, the coefficient of friction of the pressure surface 8a with the substrate and the tightening moment of the nut 12 are appropriately dimensioned.

[0041] In this case, use is made of exactly two anchor elements 9 for fixing the base plate to the substrate 3. In particular, only two anchor elements 9 are used in the transverse direction, namely one at each end of the base plate 1. Depending on the longitudinal length of the base plate 1, several anchor elements 9 can be provided in a row extending in the longitudinal direction.