GB2229755A

GB2229755A - Rail clip anchoring device

Info

Publication number: GB2229755A
Application number: GB9006876A
Authority: GB
Inventors: Graham Grinsell King
Original assignee: Pandrol Ltd
Current assignee: Pandrol Ltd
Priority date: 1989-03-30
Filing date: 1990-03-28
Publication date: 1990-10-03
Also published as: GB9006876D0

Abstract

An anchoring device (8) which is suitable for use in anchoring a railway rail-fastening clip (31, 32, 33) to a concrete rail foundation (4) is formed from a single piece of sheet metal. It includes spaced apart legs (10, 11) extending downwardly from a cross-piece (12) joining their upper ends and a tongue (13) bent out of one of the legs (11) and projecting towards the other leg (10). A passageway (18), for reception of one limb or two limbs (31, 32) of an e-shaped slip, is substantially completely surrounded by the cross-piece (12), the upper parts of the legs (10, 11) and the tongue (13). <IMAGE>

Description

FASTENING RAILWAY RAILS According to a first aspect of the present invention, there is provided an anchoring device which is suitable for use in anchoring a railway railfastening clip to a concrete rail foundation, the device having been formed from a single piece of sheet metal and comprising (when in the orientation in which it is used), first and second spaced apart legs extending downwardly from a cross-piece joining their upper ends and a tongue bent out of one of the legs and projecting towards the other leg.

Preferably, a passageway, for reception of part of the clip, is substantially completely surrounded by the cross-piece, the upper parts of the legs and the tongue. The passageway may be of circular crosssection, to receive only one limb of a substantially eshaped clip made by bending a steel bar of circular cross-section, but in a preferred embodiment of the invention the passageway is of elongate cross-section to receive two limbs of such a clip, i.e. the limbs corresponding to the upper arm and the centre arm of a letter e.

According to a second aspect of the invention, there is provided a railway rail-and-fastening assembly comprising a concrete foundation for a railway rail, two anchoring devices according to the first aspect of the invention, each having the lower parts of its first and second legs anchored in the concrete, a rail having at its bottom a flange located between and by the first legs of the two anchoring devices and two substantially e-shaped clips each having the centre and upper limbs of the e driven into a passageway between the upper parts of the first and second legs of a respective anchoring device and beneath the cross-piece of the anchoring device and having the lower limb of the e bearing downwardly on the upper surface of the rail flange, the centre limb bearing upwardly on the crosspiece and the upper limb bearing downwardly on the tongue.

According to a third aspect of the invention, there is provided a railway rail-and-fastening assembly comprising a concrete foundation for a railway rail, two anchoring devices according to the first aspect of the invention, each having the lower parts of its first and second legs anchored in the concrete, a rail having at its bottom a flange located between and by the first legs of the two anchoring devices and two substantially e-shaped clips each having the centre limb of the e driven into a passageway between the upper parts of the first and second legs of a respective anchoring device and beneath the cross-piece of the anchoring device and above the tongue.

One embodiment of the invention is described below and illustrated in the accompanying drawings, in which Figure 1 shows an end view of one of two railway rails held down on a concrete railway sleeper by two clips anchored by respective anchoring devices, Figure 2 shows a plan view of part of what is shown in Figure 1 and of the other rail, Figure 3 shows a front elevation of one of the anchoring devices, one of the clips and parts of one rail and the sleeper, Figure 4 shows a side elevation, taken as indicated by the arrow IV in Figure 3, of the same anchoring device, and Figure 5 shows a top plan view of the same anchoring device.

'Figures 1 and 2 show two railway rails 1 and 2 with a space 3 between them, above a concrete railway sleeper 4, the rails being secured to each other by plates 5, bolts 6 and nuts 7 in conventional manner.

Incorporated in the sleeper, by being inserted in the mould before pouring of a wet cement mix into it, are the lower portions of four anchoring devices 8, the illustrated two of them being for use in anchoring clips 9 which hold down the rails 1 and 2 and the other two of them being for use in anchoring similar clips which hold down one or two rails on a part of the sleeper which is not illustrated.

Each anchoring device has been formed from a single piece of sheet steel and comprises (when in the orientation in which it is used and in which it is illustrated in Figure 1), spaced apart legs 10 and 11 which diverge as they proceed downwardly from a straight and horizontal cross-piece 12 joining their upper ends. A tongue 13, centrally disposed with respect to the width of the leg 11, has been bent out of the upper part of the leg 11 and it projects, directly below the cross-piece 12, towards the leg 10, terminating very close to it, for example 1 or 2 mm.

from it. The tongue 13 extends horizontally along, and in contact with, the upper surface 4A of the concrete.

Two straight and parallel side portions 14 and 15 of the leg 11, forming most of the length of the leg 11, extend, side-by-side but spaced apart, into the concrete at an angle of about 200 to the vertical line A - see Figure 3. The lower part of the leg 10 extends into the concrete and comprises a straight portion 16 which is inclined to the vertical line B, in the opposite sense as compared to the portions 14 and 15, by about CO and, below the portion 16, a portion 17 which is curved, and, proceeding downwardly, becomes progressively further away from the vertical line B through the top of the leg 10.

The upper parts of the legs 10 and 11, the crosspiece 12 and the tongue 13 substantially completely surround a passageway 18 for reception of part of a rail-fastening clip.

A depression 20 is formed in the top of the crosspiece 12 and in the top of the upper end of the leg 10 and correspondingly a projection 21 extends into the passageway 18. As Figure 4 shows, the depression 20 and projection 21 are in the form of a wide-angle V, and as Figure 3 shows, the depths of the depression 20 and projection 21 increase smoothly from zero near the top of the leg 11 to a maximum near the top of the leg 10.

An initially flat rail-fastening clip 30, made by bending a steel bar of circular cross-section approximately into the shape of a letter e, has two limbs 31 and 32, corresponding to the upper and centre arms of a letter e, driven into the passageway 18 in each anchoring device 8 and a further limb 33, corresponding to the lower arm of a letter e, engages the upper surfaces of the flanges 29 of the two rails and thereby holds the rails down. The upper side of the limb 32 directly engages and bears upwardly upon the projection 21 and the lower side of the limb 31 directly engages and bears downwardly upon the tongue 13.

In the illustrated case the passageway 18 is of elongate cross-section, to receive two limbs of the clip, but the passageway 18 could instead be of circular cross-section to receive only the centre limb of a somewhat similar clip which is substantially e-shaped and has likewise been made by bending a steel bar of circular cross-section.

The part of the tongue 13 to the right (considering Figure 3) of the limb 31 of the clip could be omitted if desired. There could be, instead of the single central tongue 13, two tongues, side by side, parallel and spaced apart, bent out of the leg 11 and only one central portion of the leg 11 extending into the concrete instead of the two portions 14 and 15.

There could also be only one non-central tongue 13 and only one non-central portion of the leg 11 extending into the concrete. The single tongue or the two tongues could extend from the leg 10 towards the leg 11.

The legs 10 locate the rails 1 and 2 and for that purpose have substantially vertical faces projecting above the concrete.

The assembly described and shown in the drawings could be used in cases where, instead of two rails 1 and 2 end to end, there is only a single rail to be held down by the two clips 30.

The invention is especially applicable for use in mines, especially at rail joints, but has other applications.

Claims

CLAIMS:

1. An anchoring device which is suitable for use in anchoring a railway rail-fastening clip to a concrete rail foundation, the device having been formed from a single piece of sheet metal and comprising (when in the orientation in which it is used), first and second spaced apart legs extending downwardly from a cross-piece joining their upper ends and a tongue bent out of one of the legs and projecting towards the other leg.

2. A device according to claim 1 in which a passageway, for reception of part of the clip, is substantially completely surrounded by the cross-piece, the upper parts of the legs and the tongue.

3. A device according to claim 2 in which the passageway is of circular cross-section, to receive only one limb of a substantially e-shaped clip made by bending a steel bar of circular cross-section.

4. A device according to claim 2 in which the passageway is of elongate cross-section, to receive two limbs of a substantially e-shaped clip made by bending a steel bar of circular cross-section, i.e. the limbs corresponding to the upper arm and the centre arm of a letter e.

5. A device according to any preceding claim in which the tongue is centrally disposed with respect to the width of said one of the legs and two spaced apart side portions of said one of the legs extend downwardly beyond the tongue.

6. A device corresponding to any preceding claim in which said legs diverge, proceeding downwardly.

7. A device according to claim 6 in which said legs are inclined in opposite senses to the vertical when said cross-piece is horizontal.

8. A device according to any preceding claim in which said one of the legs is straight over most of its length and the other leg has a straight part and, below that, a part which is curved and, proceeding downwardly, becomes progressively further away from a vertical line through the top of that leg.

9. A device according to any preceding claim in which a projection extends into the passageway from the lower side of the cross-piece, the projection being in the form of a wide-angle V and becoming progressively deeper, proceeding from a location near said one of the legs to a location near the other leg.

10. An anchoring device which is suitable for use in anchoring a railway rail-fastening clip to a concrete rail foundation, the device being substantially as hereinbefore described with reference to Figures 3 to 5 of the accompanying drawings.

11. A railway rail-and-fastening assembly comprising a concrete foundation for a railway rail, two anchoring devices according to any preceding claim, each having the lower parts of its first and second legs anchored in the concrete, a rail having at its bottom a flange located between and by the first legs of the two anchoring devices and two substantially eshaped clips each having the centre and upper limbs of the e driven into a passageway between the upper parts of the first and second legs of a respective anchoring device and beneath the cross-piece of the anchoring device and having the lower limb of the e bearing downwardly on the upper surface of the rail flange, the centre limb bearing upwardly on the cross-piece and the upper limb bearing downwardly on the tongue.

12. A railway rail-and-fastening assembly substantially as hereinbefore described with reference to the accompanying drawings.

13. A railway rail-and-fastening assembly comprising a concrete foundation for a railway rail, two anchoring devices according to any one of claims 1 to 10, each having the lower parts of its first and second legs anchored in the concrete, a rail having at its bottom a flange located between and by the first legs of the two anchoring devices and two substantially e-shaped clips each having the centre limb of the e driven into a passageway between the upper parts of the first and second legs of a respective anchoring device and beneath the cross-piece of the anchoring device and above the tongue.