FR2650607A1 - METAL RAILWAY TRACK WITH HOLLOW BODY - Google Patents

Abstract

The invention relates to a railway sleeper comprising a pair of hollow stop blocks (1a, 1b) connected together via a linking tie-rod (2), each stop block being provided in order to support a rail (3) of the said railway. A sleeper according to the invention is noteworthy in that the said tie-rod (2) is fastened by at least one of its ends to the corresponding stop block by an articulation provided inside the said stop block, the articulation being formed more particularly by a fixed or integral spindle of the stop block, in a manner substantially perpendicular to the tie-rod, and by a bush (8) which is provided at the corresponding end of the said tie-rod (2) and which is intended to be traversed by the said spindle (10) about which it can rotate.

Description

The present invention relates to a railroad crossing,

  of mainly metallic constitution and hollow body, which can be dismountable into several elements Pt may-- comprise a device compensating for the leveling defects of the railway. The existing railway sleepers are ready to be installed immediately under the rails, and they

  require large and expensive manufacturing facilities.

  cation and storage: 1 / wooden sleepers are the most used in the world Their lifespan is about 20 years because they are subject to the climatic conditions of each country (sun, rain, cold,

  etc ...) and the aerials of insects and diseases of the woods.

  Their manufacture requires sawing facilities, slitting

  drilling, wood treatment and storage.

  2 / concrete sleepers (monobloc or bi-block) are heavy so fragile to pose and transport (bi-block): twisting of the central metal spacer. In addition, the leveling defects of the channels often create the rupture of the metal spacers flush with one of the two concrete blocks of the crossbar Their manufacture require large units of machinery and expensive equipment (preparation and dosing of concrete, machines to cast sleepers, vibrators, drying plants ...)

  - Handling and transport of these sleepers are expensive.

  3 / conventional metal sleepers that have been in existence for more than 50 years are no longer adapted to the technical requirements of modern railways related to the problems of loads and speeds. Moreover, because of their design, the leveling works of the tracks equipped with these sleepers by stuffing

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-c-niCue are mrl ease.

  It is also possible for the sleepers to

risks of central failure.

  The metal cross member according to the invention overcomes the drawbacks mentioned above since it comprises essentially three main parts combining the advantages of the three types of aforementioned crosspieces, while eliminating their disadvantages: a) Two metal hollow bodies, supporting the rails of the railway, whose base is based on the ballast of the track.

  b) A connecting spacer joining the two hollow bodies.

  According to particular embodiments, the crossmember may consist of: 1 / two hollow bodies connected Dar a metal spacer reno-ue secured to the hollow body by welding, or any other means

known fixation.

  2 / two hollow body connected by a metal spacer secured to the hollow body by a removable shaft, thus allowing to separate the spacer of the two hollow bodies if necessary

  3 / a device making it possible to compensate for leveling defects

  the railroad tracks, thus avoiding breaks in the metal spacer flush with one of the two

hollow of the transom.

  4 / various means for stabilizing and anchoring the hollow bodies in the ballast of the railway (baffles under the crossbar or on the lateral faces, lateral lugs, abutments, etc.)

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  To / one or more internal reinforcements under the support rail (inside the hollow body) and to improve the resistn'nce 6 / an internal damper to the hollow body of the cross member (Clastomer, ... .) can be installed to improve the

  flexibility of the track and reduce vibrations and -

  noises. The accompanying drawings illustrate the invention: FIG. 1 represents a bottom view of a cross member according to

  the invention, with different devices for anchoring to the ballast.

  FIG. 2 represents the front view of FIG.

  FIG. 3 represents the top view of the crossmember

of Figure 2.

  FIG. 4 is a partial front view of an example of a crossbar fixed at three points between the hollow body and its

connecting strut.

  FIG. 5 is a view along the arrow FI of FIG. 4 FIG. 6 is a partial front view of an example of a dismountable cross member and comprising a device for compensating for the leveling defects of the track, as well as an anchor

  infrebraiding forming a stop at the ballast of the railway.

  FIG. 7 is a view along the arrow F2 of FIG. 6.

  FIG. 8 is a partial sectional view of one of the ends

  cross section of Figure 6.

  FIG. 9 is a view along the arrow F3 of FIG.

  Figure 10 shows a bottom view of a cross member according to the invention: the left part being the part in contact with the ballast, and the right part being the part located under the rail.

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  11 is a half-cross front view having its central metal spacer integral with the hollow body of

  the crossbar, by welding on it.

  The fi lure 12 represents a half-crosspiece in front view having its removable central metal spacer, and integral with the

  hollow body of the cross member by bolted sleeve.

  The display 13 represents an entire cross member according to the invention, the central metal spacer is removable and comprises within the two hollow bodies a spring of

  compensation for leveling defects in the track.

  Figure 14 is a section of the half-cross Figure 11.

  FIG. 15 is a section of the half-cross member FIG.

  the axis of articulation of the metal spacer.

  Figure 16 is a cross section of the cross member Figure 13 in

  axis of articulation, also showing the compensating spring

  placed under the metal spacer.

  FIG. 17 represents a cross-member block according to FIG. 13 made in a foundry, and comprising two known devices of

rail fastening.

  Figure 18 is a section BB of Figure 17.

  Fig. 19 is a broken section of Fig. 17.

  Figure 20 is a schematic view of the function principle.

  of the cross member according to FIGS. 13 and 17.

  With reference to these drawings, the hollow body of the cross-member consists of parts 1a and 1b supporting

  the rails 2 to which are fixed the flanges 3 and 4.

  Plates 5, 6, 7, 8 close the ends of bodies 1a and 1b. And a central metal spacer 9 connects the two hollow body blocks 1a and 1b.

2650.607

  The supports 1a and 1b may comprise reinforcement baffles 10 at the interior of the body and under the rail, and the sole 3 and 4 may also comprise baffles 11, 12, 13 or abutments 14 so as to the ballast obstructs the lateral forces of the track thanks to a better anchoring of the sleepers. Similarly, lateral baffles may be provided along 15 or side lugs 16 forming an integral part of bodies 1a and 1b. The central spacer 9 can be fastened by welds or pin to the body 1a, and it can be dismountable from the body 1b by bolts 17 fixed to a sleeve 18 assembled to the body 1b by a

  axis 19. The two bodies can thus be welded to the

  toise 9, or can be assembled to be dismountable according to lb. An inner cushion 20 may be incorporated within the hollow bodies 1a and 1b and thereby serve as a buffer between the upper and lower faces of the bodies 1a and 1b, and also reduce the noise and vibration transmitted by the channel. ballast not shown on the drawings. These cushions 20 freely let the central spacer 9 inside

a large cavity 21.

  A device for compensating for leveling defects of the track may be incorporated and is constituted by a spring 22 placed under the spacer 9 and on the top of the sole 3 and 4 The operation of this device is as follows: The spacer 9 is in permanent support in the blocks 1a and 1b at 23 and 24 respectively, and is mounted on an axis of

  pivoting 19a and lib parallel to the rail 2 of the railway.

  The distance A is maximum and constant, and the distance P defines the gauge of the railway. When under the effect

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  of the passtae of a train, the block lb lowers more than the block la and the difference in the vertical movement of the two blocks corresponds to the distance C, the block lb er.train in its descent

  1 'in emIble of the Ig9b axis which comes in position 19c.

  The spring) 2a is slightly compressed by the spacer -.

  And the spacer 9 will resume its normal position soon after the passage of the train, but will have undergone any effort of bending or twisting. It therefore amounts to replacing the principle of the vertical rigidity of the sleepers with that of the freedom of movement of each block relative to the other under the effect of the suspended loads in motion, taking into account also the differences in the resistance of the ground, by .application of the freedom of movement left to the metal spacer-connecting the two

  blocks of the crossbar linked to a trapezoidal geometry constituting

  killed by four axes of articulation, the points of contact

  23 and 24 can also be considered as axes of articulation.

on the spacer 9.

  This railroad is particularly intended for all railroads with heavy loads or high speeds, as well as intensive traffic (subways, etc ...).

Claims (6)

R E V E N D I C A T ION S   1 / Traverse railway characterized in that it comprises two metal blocks and the hollow lb, totally   closed and interconnected by a metal spacer 9.   2 / Railway cross member according to claim 1 characterized in that the metal spacer 9 is fixed   to the two blocks la and lb, and can not be separated.   3 / railway crossing-according to claim 1   characterized in that the metal spacer 9 is removable.   4 / Traverse railway according to claim 3 characterized in that the metal spacer 9 has at one of its ends, or at each of its ends a   sleeve 18 connected to the blocks 1a and 1b by a connecting pin 19 - removable.   Railway cross member according to claim 1 characterized in that it comprises an internal cushion 20, damping of noise and vibration, interposed between the support of the rail 10 of the metal blocks la and lb, and the sole of the crossbar 3 and 4.   6 / Traverse according to claim - characterized in that it comprises reinforcing baffles 10 under the support of the block rail la and lb. 7 / Traverse according to claim 1 characterized in that it   has on its external faces chicanes ll, .ou des = -   grooves 12,13,14,15,16 forming an integral part of the blocks 1a and 1b, allowing a better anchoring of the crossbar in the ballast located on the sides and under the blocks laet lb.   8 / railway crossing according to claims 3 and 4 8 2650607   characterized in that it comprises a compensating device of the leveling defects of the track based on the articulation at four points 19a, 19b, 23, 24 of trapezoidal geometry internal to the cross member, allowing the cross member under the effect of the train loads down one side or the other and following the space that can exist between the top. ballast and the underside of the sole of the crossbar shown in FIG. 4/4 rep. C. 9 / Traverse according to claim 8 characterized in that the compensating device is constituted by springs 22 placed under the metal spacer 9 inside the   blocks la and lb above the sole 3.