PH26662A - Process for producing concrete railway cross-sleepers - Google Patents

Description

: Sl ; » 1 266C2 oo GC "PROCESS FOR PRODUCING CONCRETE RAILWAY CROSS-SLEEPLRS , AND ELEMENTS USED FOR THIS PROCESS".

Abstract of the disclosure:

The invention pertains to a process for producing concrete cross-slecpers, said process comprising sub- stantially locating two elements of a rail clamping de- vice through openings provided in the casting mould; securing said elements; locating the upper reinforcement : on supports for said elements and, if desired, locating an intermediate reinforcement; disposing a connection rod and pouring concrete, the lower reinforcement being ap- plied at a suitable time and the assembly being subjected to a vibrating operation, This invention relates also to the elements used for this process.

This invention relates to a process for producing cross-sleepers made of reinforced concrete for railways, as well as the elements used for this process.

More particularly, this invention relates also to a process for producing concrete cross-sleepers wherein one part of a combined clamping device for the rails (e.g. of the type as described in the Belgian Patent

No. 882.165 of the Applicant) is embedded in said cross- sleepers. ’

It is known that cross-sleepers of reinforced con- crete are produced by using a casting mould in which the above-mentioned parts of the concerned clamping device are disposed and suitably located, at least the upper reinforcement of said sleeper being then disposed in the bottom of said mould, said reinforcement being retained by using Lonporary supports which are disposed

: » oo 26662 transversally in the mould through the wall thereof and which are removed only during the vibrating of the con- ! Crete mass and even during the last stage of said vibra- ting, so that, on the one hand, the said reinforcement is maintained at the suitable level and, on the other hand, the spaces formed by said supports are filled up at the end of the vibrating operation.

It is apparent that such device and process are not only tedious, but also expensive.

In addition, it has been also attempted to get round the difficulties of said process by locating simple spacing elements in the bottom of the mould for the above-mentioned reinforcement in any material as it is usually the case namely in the road construction.

However, as a result, when the cross-sleeper is finished, said spacing elements are disadvantageously visible and, in some cases, they allow a water infiltration down to the reinforcement material, thereby resulting in rust formation reducing progressively the resistance of the cross-sleeper, which is not tolerable.

The present invention relates to a process and an apparatus allowing to prevent the drawbacks of the known processes and apparatuses. For this purpose, the process according to the invention comprises substantially loca- ting two parts or elements of a rail clamping device through openings provided in the bottom of a casting mould; suitably securing said elements outside the mould; locating the upper reinforcement of the cross-sleeper on supports provided therefor on the said elements; loca- ting, if desired, an intermediate reinforcement on the upper reinforcement; passing a connection rod through an opening provided in the wall of the mould; and fil-

oo 266062 ling up the mould by pouring concrete therein, the lower reinforcement being then conventionally disposed at a suitable time and the assembly being then subjected to a vibrating operation.

According to this invention, the elements used for this process and consisting substantially of the sta- tionary portions embedded in the concrete mass and for- ming part of the rail clamping device proper are provi- ded with at least two supports for the upper reinforce- ment of the cross-sleeper.

The characteristics of the invention will be more apparent from a preferred embodiment of the elements according to the invention, said embodiment being descri- bed hereafter only by way of example and without any li- mitation, reference being made to the enclosed drawings in which :

Figure 1 is a vertical longitudinal cross-section through a mould used for carrying out the process accor- ding to the invention;

Figure 2 is a cross-section taken on the line II-I1 of Figure 1;

Figure 3 is a view similar to that of Figure 1, but after having located the upper reinforcement of the cross—sleeper and an intermediate reinforcement in the mould;

Figure 4 is a cross-section taken on the line 1IV-1IV of Figure 3;

Figures 5 and 6 are respectively a front view and a side view of an clement according to the invention;

Figure 7 is a side view of one end of a concrete cross—sleeper obtained by the process and with the cle- ments according {o the invention;

. oo 26662 . \ ' ." y i

Figure 8 is a cross-section taken on the line

VIII-VIII of Figure 7.

Figure 1 shows a mould 1 in the bottom of which are provided openings 2 and 3 respectively in which the parts 4 of the lowermost elements 5 of a rail clam- ping device may be suitably disposed, said parts 4 pro- jecting normally from the cross-slecper.

Said elements 5 are provided with a flange 6 so that they may be very rcadily maintained in the above- co 10 mentioned openings 2, 3.

Said elements are accessorily maintained outside the mould 1 in a conventional manner (not shown).

Then, the upper reinforcement 7 of a cross-sleeper , being produced is introduced in the mould 1l, said rein- forcement being located on a support 8 or 9 of each element 5, so that said reinforcement is automatically located and maintained at a suitable distance relative to the bottom of the mould 1.

According to the present invention, each element 5 is provided not only with the supports 8, 9, but also with inner accessory supports 10, 11] either the supports 8, 9 (as in the illustrated example) or the supports 10, 1l being used for locating a reinforcement according to the type of cross-sleeper or according to the type of reinforcement which is used or required.

Then, on said reinforcement 7, is disposed a coiled reinforcement or similar 12 through which extends a con- nection rod 13 via an opening 14 provided in the concer- ned side wall of the mould 1, said connection rod being provided for connecting two parts as provided in the mould 1 at a suitable distance relative to each other.

Tt is then possible to readily pour concrete into the mould 1, while suitably vibrating it, a lower rein- forcement 15 provided as known per se being then dispo- sed in the mould 1 at the end of the operation.

It is apparent that a simple process and a simple moulding device are therchy obtained, the upper reinfor- cement 7 being maintained with a high reliability and in ideal circumstances at a suitable distance from the bottom of the mould by using elements forming part of the rail clamping device and provided with suitable supporting locations for the reinforcement.

Figures 5 and 6 show a preferred embodiment of the elements 5 and, in these figures, it is apparent that ce the supports 8, 9, 10 and 11 are formed by suitable notches 16, 17 and 18, 19 respectively in which the reinforcement may be, in a manner, applied, so that said reinforcement is not only supported, but also se- cured against any motion, thereby preventing any shif- ting of said reinforcement in any condition.

Finally, figures 7 and 8 show an embodiment of a cross-sleeper obtained by the process and with the ele- ments according to the invention, more particularly with the elements as shown in figures 5 and 6.

The present invention is not at all limited to the embodiment described by way of example and repre- sented in the enclosed drawings, but such cross-slee- pers obtained by the process according to the invention and with the elements used in said process may be made in any shape and dimension without departing from the scope of the invention.

Claims (1)

1. Cai enn So -— — i $i } ! t # I 4 o ~N < ro } i WHAT Wl CLAIM IS:

   l. Process for producing railway cross- sleepers, characterized in that it comprises the 2 steps of: locating two elements of a rail clamping de=- ! vice through openings provided in the bote ; tom of a casting mould, suitably securing said elements outside the 8 3 of moulds; fl 3 110 locating an upper reinforcement of the crosse } ! sleeper on supports provided therefore on v8 ¢ the suld elensnts, BY} ! : passing a connection rod through an opening I ; provided in the wall of the mould and fille lo er Foo1b ing up the mould by pouring concrete there= il ! in, and ‘HY conventionally disposing the lower reinforcee ' °0 ment at u suitable time and subjecting the assembly thea to a vibrating operation. oJ 0s qeT 20 Ze Process according to Claim 1, characterized by wo Le the step of locating sau intermesdiaule reinforcement on wal the upper reinforcemencs sm 4, brocess according to Claim 1 or 2, charac= Jug as

   § Cv ~N i La 1 terized in that sald elemc¢nts are provided, on the thon embedded portion thereof, with at least two supe : ports for the sald upper reinforcement of the Crosse- sleoper. J J 5 4b. Process according to Claim 3, charace < : terized in that the embedded portion of said elee ; ments is U-shaped, the opposite external sides of the lexs of said U-shaped being each provided with : | the said support. wd of 10 5e« Process according to Claim 3, characterized J in thot the embedded portion of the said elements is 1 U-shaped, the opposite internal sides of the legs of sald U-shaped being each provided with the said supe port. . el

   6. Process according to Claim 3, characterized in that the embedded portion of the said elements is ) U-shaped, the opposite axturnal and internal sidee of A the leg of Build U-shapud veing euch providod with oo! the said support. 0s 20 7+ Process according to Claim 6, characterized in that the supports provided on the external side of the legs are located aut a level different from that ‘ of the supports provided on the internal side of said legs. «9 ew

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   : 8. Process according to any of laims 3 ; to 7, characterized in that the said supports are ! each formed by a local enlargement of the lega of ! the element. 4 < i 5 9. Process according to any of Claims 3 to Cd { 4 7+ characterized in that the said supports are each i i ) L formed by a notch or a recess provided in the legs ki P g i of the slements. i ; : 10. Process according to Claim 9, characterized

   F . “ , . oo. Ve Lor Vay se] QL 3.30... in that. the said notch or recess is half-oylindricaly fw: woo cd gre P oo : = ! ar A FRANS H, MATTHYNSSENS : Inventor } 08