FI97741C - Arrangement for attaching track rails to steel sleepers - Google Patents

Description

97741

The invention relates to an arrangement for fastening track rails to steel sleepers, the rail being placed on the sleeper with a possible spacer, against the rail, in addition to the arrangement comprising an element directed downwards from the log, which acts as a lateral holding element of the log.

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The sleeper with its associated parts is a structural element of the track, the function of which is to keep the rails in place at a well-defined distance from each other, to transmit vertical, longitudinal and lateral forces to the substrate and also to transmit longitudinal and lateral forces to the substrate.

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The materials used for the sleepers are wood, concrete and steel. Solutions based on different materials are designed to meet the same, well-defined requirements, so the only difference is the technical implementation aspects. These, in turn, are important in terms of manufacturing costs and economics of use.

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The advantages of steel sleepers over wooden and concrete sleepers are long and flatness, lightness over concrete sleepers, good tropical and frost resistance, good support on the track in the direction of the rails, ease of manufacturing gears, suitability for mass production, suitability for large axle weights and also significant 25

♦ · ♦ * ·: · * According to studies, the use of steel logs in the embankment saves about 600 m3 / km, the logs are so light that they can be handled by man and can be reused as a valuable raw material in steelmaking.

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Steel sleepers are usually hot-rolled or hot-rolled or cold-rolled. U-shaped profiles made by molding, in which the bottom of the U forms a • · log cover. It is known e.g. log forms UIC 28, Th 82 AG's SW 82, Australian BHP's M and W series, logs manufactured by Nippon Steel of Japan and 35 Omark Industries of America. All said logs are arranged laterally with respect to the track embankment by bending the ends of the logs downwards. This work step is cumbersome and requires an extra length of 20-30 cm from the log.

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Track rails are now attached to steel sleepers either by welding a separate washer to the sleeper cover (Thussen AG), with a bolted joint (Nippon Steel) or by shaping the platforms and openings in the sleeper cover to thread the fastening springs (Omark). Welded structures are disadvantageous in terms of fatigue strength, bolted joints are expensive 5 solutions for log cover design as a hot expensive work step.

Patents related to steel sleepers include, for example, US-1,021,006 from 1912, US-1,343,262 from 1920, AU-78/34778 from 1978 and Finnish patent FI-89291 from 1993.

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The aim of all the mentioned inventions is the same functions: attaching the rails to the sleeper and conducting forces acting in different directions to the chassis, but they are implemented in technically different ways.

U.S. Pat. No. 1,021,006 relates to a steel log made by bending box-like parts of the same sheet blank under the log at rails to ensure lateral grip of the log.

In the solution according to US-1,343,262, the ends of the log are bent upwards to form a lateral support of the rail. On the other side, the rail is tightened against this support with a lever or screw-tightened lever, the other end of which rests on the base.

AU-78/34778 relates to a log structure with cup-shaped end portions and a connecting portion therebetween. The rail with its insulating plates is in the recess of the cup-shaped part.

25 The springs are tightened with a separate pin-pin solution.

• »f * - 'V Finnish patent FI-89291 discloses a structure in which a separate barrier plate is attached to the rail under the log by means of spring mounting lugs. This known technique is shown in the accompanying Figure 1.

; 3 *): • I * • · Figure 1 shows the arrangement according to the patent in cross-section of the rail. The arrangement comprises a sleeper 1, a lateral holding element 2, a rail 3, a flat steel lug 4, a spring 5, a seal 6 and a washer 7. The lateral holding element has stiffening grooves 8 and a printed recess 9. In the open through the corresponding opening while the second leg 10 extends through the opening in the log and the opening in the lateral holding barrier. In other respects, reference is made to patent specification.

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Although said FI patent represents an improvement over the prior art, the additional lateral holding element naturally causes additional costs as well as an additional work step in the fastening phase.

The object of the present invention is now to further improve and simplify the arrangement, and in order to achieve this, the invention is characterized in that the downwardly extending extension of the lug forms said lateral holding element.

The invention will now be described in detail with reference to the accompanying figures, in which: Fig. 1 shows an already described arrangement according to the FI 89291 patent in cross-section, Fig. 2 shows the operation of the mounting part according to the invention in cross-section, Fig. 3 shows an enlarged section of the arrangement according to the invention. Along AA and the arrangement of the arrangement on a steel track log, and Figure 4 shows the arrangement as a whole when viewed from the side.

Thus, Figure 2 shows the operation of the fastening part of the arrangement according to the invention in a cross-section of the rail. The arrangement according to the invention comprises a steel sleeper 1, a fastening lug 4, a spacer 7, a rail 3, an insulator 6 and a fastening spring 5.

Figure 3 is an enlarged sectional view of an arrangement according to the invention. . van 3 along lines A-A and the arrangement of the arrangement on a steel sleeper.

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In the arrangement according to the invention shown in Figures 2 and 3, the track rail 3 and the spacer plate 7 are placed on a steel sleeper 1. A fastening lug 4 is threaded into the openings 1 130 1 · pierced in the sleeper I. Between the fastening lugs 4 a spacer 7 is placed, on which the rail 3 rests. Between the rail 3 and the fastening lug 4, · V, an insulator 6 and a rail 3 are fastened in place with fastening springs 5.

The idea of the invention is that the downwardly directed extension 4a of the fastening lug 4 is shaped to form at the same time a lateral holding element of the log 1.

4,97741

The fastening lugs 4 on both sides of each rail rail 3 thus form four pieces of lateral holding barriers 4a under the sleeper 1, as shown in Fig. 3.

By shaping the fastening lugs 4 so that the downwardly directed prongs 4a are located close to each other at the rails 3, only a parallel force is applied to each prong. The prongs of the fastening parts, when supported on the compacted crushed stone at the rail rail 3, form in pairs effective lateral transfer barriers, as shown in Fig. 4.

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The invention provides a simple, easy to manufacture and economically advantageous solution. The fastening lug 4, 4a of the steel sleeper 1 according to the invention acts as a lateral support of the rail 3, as a fastening part of the fastening spring 5 and at the same time forms a lateral obstacle to the base of the sleeper 1.

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The solution according to the invention is suitable for use in all steel sleepers, regardless of their method of manufacture or track spacing. Likewise, the mounting lug can be shaped for use with different types of mounting springs. The mounting lug is made of flat steel, for example.

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Claims (3)

97741 1. Arrangement for the main body of the cylinder, colors (3) and, if applicable, (7) placerats on the arms (1), on the separate arms (4) on the base 20 of the arms and the arms (1) and on the element (5) with the aid of the spindle spindle on the screen (3), varvid arrangemanget vidare omfattar et element riktat nedän fränil, vilket fungerar som tyohohelelement för lap, . An arrangement for fastening track rails to steel sleepers, wherein the rail (3) with a possible spacer (7) is placed on the sleeper (1), a separate lug (4) is fastened to at least one opening in the sleeper (1) and a spring element 5) is tensioned against the rail (3) by means of a lug, the arrangement further comprising an element directed downwards from the log, which acts as a lateral holding element of the log, characterized in that the downwardly extending extension (4a) of the lug (4) forms said lateral holding element. 2. A method according to claim 1, which comprises a key (4) of 4 *: · a ring according to the bracket (3) and a binding element (4a) of said slag. ·· » Arrangement according to Claim 1, characterized in that the fastening lugs (4) on both sides of the track rail (3) form such a lateral holding element (4a). Arrangement according to Claim 1 or 2, characterized in that the fastening lugs (4) are made of flat steel. 3. The arrangement according to claims 1 or 2, which is based on the invention (4). tillverkats av plattjäm. • · · <«« «• · · •«