KR20100011450A - Rail fastening device - Google Patents

Abstract

PURPOSE: A rail fastening device is provided to steadily support rails against horizontal force, and to easily control an interval between the rails. CONSTITUTION: A rail fastening device comprises height adjustment pad(200), a pressure dispersion device(300), fasteners(400), and a pressure device(500). The height adjustment pad is formed between a rail(100) and a sleeper. The pressure dispersion device is formed between the rail and the height adjustment pad. The fasteners have more than one lower bracket(420) and an upper bracket(410). The lower bracket is buried in the sleeper. The upper bracket is passed through the height adjustment pad, and attached on the top of the lower bracket. The pressure device is fixed on the height adjustment pad by the fasteners, and elastically supports the rail.

Description

Rail fastening device

The present invention relates to a rail fixing device for elastically supporting both sides of a rail rail (Rail) to secure the rail to the upper part of the sleeper, and more particularly to buffer the load, impact transmitted to the rail during the train operation, and transverse pressure The present invention relates to a rail fastening device that distributes the gap and facilitates the adjustment between the rails and provides a firm fastening force.

Rail fastening device for fixing the rail to the sleeper is a very important factor to ensure the stability of the rail in proportion to the increase in the weight and speed of the train.

In general, the rail fixing device is fixed between the rail and the sleeper, the support plate member wider than the size of the rail to the sleeper, and after fixing one side of the elastic member in the form of a fixed clip to the fixing member exposed to the upper portion of the support plate member, this elastic member The other side of the rail is used to secure the rail to the sleeper by supporting the rail foot (Rail foot).

This is a technique that is proposed in the registration number 20-0342448, as shown in Figure 1 in configuring the rail fixing support 100 for fixing the railway rail (1) on the concrete sleeper (2) When the concrete sleepers 2 are manufactured, a stamp 10 embedded in the sleepers is fixed to the inside of the sleepers, and the stamp 10 is integrally cast and protruded to the upper side of the sleepers to fasten the rail clip spring clips 3. It consists of a head portion 20, wherein the head portion 20 forms two vertical support wall portions 21 for fastening of the spring clip 3 and reinforces between the upper ends of these two support wall portions 21. Rib 22 is formed integrally connected.

Here, the stamp 10 is made of a metal material with durability and impact resistance to withstand repeated large loads and impact force, and then the rail stamp 10 is fixed to the inside of the sleeper when the concrete sleeper is formed, connected to The head portion is coupled to the sleeper so as to protrude above the sleeper for fixed support of the rail.

However, such a rail fixing device has no function of absorbing cyclic loads and shocks imposed on the rails from the train traveling on the rails and dispersing the lateral pressure, so that the head portion of the rails may be deformed and broken. Since the stamp is embedded in the sleeper, when changing the position of the rail, the position of the rail can be adjusted by replacing the sleeper with a different position of the stamp or by placing an insulating block having a different size, but this is very difficult and expensive to construct. .

On the other hand, Publication No. 10-2007-0042973 relates to a technique capable of adjusting the position of the rail, Figure 2 is a retaining element for receiving the clip 24, the through-bolt inserted into the socket embedded in the sleeper 34 ( A configuration for fixing through 76, 94 is disclosed.

However, the rail fixing device can be easily separated by loosening the through bolts 76 and 94, but the structure of the lower rail and the structure of the bolt fastening part are complicated, and the load, shock and lateral pressure repeatedly generated during train operation Since the structure is vulnerable to the back, the rail head portion 10 may be deformed and damaged by continuous fatigue accumulation. In addition, since one of the through bolts 76 and 94 is disposed on one side or both sides of the rail, the support of the rail is unstable.

In addition, the eccentric bushes 72 and 74 are inserted into the shoulders of the fasteners (SFC fasteners) so that the rails move left and right, but in this case, the eccentric bushes 72 and 74 are rotated about the center part. There is a problem in that the center and the center of the fastener are shifted and cannot be accurately positioned perpendicular to the rail.

The present invention is to solve the above problems, to prevent the cracks, deformation and breakage of the rail by buffering the load and vibration generated during train operation and to distribute the lateral pressure, and to easily adjust the left and right intervals of the rail At the same time, it aims to stably support the rail against lateral pressure and to provide a rail fixing device with improved workability and workability during installation.

In the rail fixing device for fixing the rail to the upper side of the sleeper 10 by elastically supporting both sides of the rail,

A height adjustment pad 200 formed between the rail 100 and the sleeper 10;

A pressure dispersing means (300) provided between the rail (100) and the height adjusting pad (200);

At least one lower bracket 420 buried in the sleeper 10 and the upper bracket 410 is fixed to the upper bracket 410 to be attached and detached to the upper portion of the lower bracket 420 through the height adjustment pad 200 Means 400; And

Pressing means 500 is fixed to the fixing means 400 on the height adjustment pad 200 to elastically support the rail 100 in the direction of the sleeper (10);

Characterized in that consists of.

The rail fixing device of the present invention cushions loads and vibrations generated during train operation and distributes lateral pressure to prevent cracking, deformation and damage of the rails, and easily adjusts the left and right rail spacing and at the same time transversely. It stably supports the rail against pressure, and has an effect of improving workability and workability during installation work.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Prior to this, terms or words used in the specification and claims should not be construed as being limited to the common or dictionary meanings, and applicants may appropriately define the concept of terms in order to best explain the invention. On the basis of the principle that the present invention should be interpreted as meanings and concepts corresponding to the technical idea of the present invention.

Figure 3 is an exploded perspective view showing a first embodiment of the rail fixing device according to the present invention, Figure 4 is a perspective view of the combination according to Figure 3, Figure 5 is a sectional view according to Figure 3, Figure 6 of the pressure distribution means according to Figure 3 7 is an exploded perspective view of the pressing means according to FIG. 3, FIG. 8 is an exploded perspective view of the fixing means according to FIG. 3, and FIG. 9 is a sectional view showing a state in which the rail according to FIG. 3 is moved to one side. 3 is a perspective view showing a height adjustment pad according to Figure 3, Figure 11a is a sectional view showing a second embodiment according to the present invention, Figure 11b is a plan view according to Figure 11a, Figure 12a shows a third embodiment according to the present invention 12B is a plan view according to FIG. 12A, FIG. 13A is a sectional view showing Embodiment 4 according to the present invention, and FIG. 13B is a plan view according to FIG. 13A.

Example 1

As shown, the invention of Example 1,

A height adjustment pad 200 formed between the rail 100 and the sleeper 10;

A pressure dispersing means (300) provided between the rail (100) and the height adjusting pad (200);

At least one lower bracket 420 buried in the sleeper 10 and the upper bracket 410 is fixed to the upper bracket 410 to be attached and detached to the upper portion of the lower bracket 420 through the height adjustment pad 200 Means 400; And

The pressing means 500 is fixed to the fixing means 400 on the height adjustment pad 200 to elastically support the rail 100 toward the sleeper 10.

In the rail fixing device of the present invention, the height adjustment pad 200 may be produced in a plate shape with a long length in the transverse direction of the rail 100, at least one or more fixing means passing through the rail (100) ( 201) may be coupled to the upper bracket 410 of the fixing means 400 through the fixing means through hole 201 to the lower bracket 420.

On the other hand, as shown in Figure 9, the height adjustment pad 200 is divided into the front and rear in the longitudinal direction of the rail 100, the one end portion is divided is formed with a locking groove 202a wider than the inlet At the other end, a locking hole 202b is formed to be coupled to a shape corresponding to the locking groove 202a.

One or more long holes may be formed in both sides of the fixing means through hole 201.

When the height adjustment pad 200 is divided into front and rear as described above, the upper second nut 412 fastened to the bolt 411 of the fixing means 400 is slightly loosened and the height adjustment pads are moved to both sides around the divided portion. 200 can be taken out.

Therefore, the conventional height adjustment pad was able to add or replace only after dismantling all the fixing means, in the present invention, it is easy to secure only the insertion space of the height adjustment pad 200 even if the fixing means 400 is not completely dismantled. You can add and replace.

In addition, the height adjustment pad 200 can be adjusted by replacing the height of the rail 100, one of the thick height adjustment pad 200, or using a plurality of thin height adjustment pad 200.

On the other hand, as shown in Figure 6, the pressure distribution means 300 is layered in the order of the elastic pad 310, the base plate 320, the rail pad 330 from the top of the height adjustment pad 200. . As described above, the pressure distribution means 300 buffers the load and the impact of the train applied to the rail 100 and at the same time the pressure transmitted in the lateral direction is dispersed.

The elastic pad 310 may be manufactured using a resin material, and may be manufactured in a shape having a through hole at the center or a square plate shape. Since the elastic pad 310 is made of a resin material, the impact of the rail 100 is buffered at the upper portion of the height adjusting pad 200, thereby preventing cracking, deformation and damage of the rail 100.

The base plate 320 forms a first inclined portion 322 which is inclined downward in the direction of the other rail 100 opposite to the rail 100 at an upper portion thereof, and has a predetermined length on both sides of the rail 100 in the transverse direction. An extended seating jaw 321 may be further provided.

Here, the first inclined portion 322 is to distribute the load, impact and pressure applied to the rail 100 when the train is running, the inclined surface in the direction of the rail 100 facing the first inclined portion 322 Therefore, the load and impact acting on the sleeper 10 serves to disperse the lateral pressure to the inclined surface at the same time.

At this time, the base plate 320 can achieve a greater pressure dispersion effect by the elastic pad 310 layered on the bottom.

The rail pads 330 may be provided with extension portions bent downward on both sides of the rail 100 in the longitudinal direction so that the extension portions surround both ends of the base plate 320.

As shown in Figure 8, the fixing means 400, the lower bracket 420 is embedded on both sides of the sleeper 10 around the rail 100, respectively, at least one or more on the upper both sides of the lower bracket The upper bracket 410 is fastened respectively.

The lower bracket 420 is provided with a fixing bar 421 that is vertically embedded in the sleeper 10, is connected to the upper portion of the fixing bar 421, the upper surface is preferably the same as the sleeper 10 It is provided with a connecting plate 422 of the rectangular plate shape to form an outer.

The fixing bar 421 may be manufactured in a vertical bar shape, the outside may be formed with irregularities in order to increase the coupling force with the inside of the sleeper (10). This unevenness is only a preferred embodiment and may be made in various shapes and may be formed of a plurality of grooves.

In addition, the connecting plate 422 is made of a plate shape, in particular, the outer inclined third inclined portion 423 is formed inclined downward, at least one slide groove 424 may be provided on the top.

The third inclined portion 423 serves to buffer the transverse pressure and the vertical pressure of the rail 100 in the state embedded in the sleeper 10, the third inclined portion 423 is the rail 100 The pressure acting in the vertical and transverse directions of the dispersion is prevented from breaking the connected sleeper 10 site.

That is, since the connecting plate 422 has a predetermined width, the load, impact, and pressure generated when the train is running are dispersed in a large area.

The slide groove 424 is provided with a groove extending in a narrow width on one side or both sides in the longitudinal direction of the rail 100, the fourth inclined portion 424a is inclined downward on the opposite end of the groove.

The upper bracket 410 of the fixing means 400 is provided with a bolt 411, the slide hole 411a is formed at the bottom to slide after being inserted into the slide groove 424, the bolt 411 ), The tooth washer 414, the washer 413 and the screw 412 are sequentially inserted.

The slide hole 411a of the bolt 411 is manufactured to have a shape corresponding to be inserted into the slide groove 424, and has a second slope to slide to the fourth inclined portion 424a of the slide groove 424. The part 411b is formed in the edge part of both slide holes 411a.

That is, since the inclination angles of the second inclined portion 411b and the fourth inclined portion 424a correspond, the shock during train operation and the pressure during tightening of the screw are dispersed on the inclined surface to which the inclined surface is contacted so that the breakage of the fastening portion is prevented. Is prevented.

As shown in detail in FIG. 7, at least one having a length in the transverse direction of the rail 100 so that the bolt 411 of the upper bracket 410 passes through the fixing body 510 of the pressing means 500. The above-mentioned long hole 511 is formed.

A plurality of second holes in the longitudinal direction of the rail 100 are formed at the outer side of the long hole 511 in the longitudinal direction of the rail 100 to mesh with the first teeth 414a of the tooth washer 414. Tooth 512 is formed.

In addition, two first supporting parts 520 are provided on both upper sides of the fixing body 510 and protruded in the longitudinal direction of the rail 10.

Here, the long hole 511 is to pass through the bolt 411, which is a component of the upper bracket 410 of the fixing means 400, it is possible to adjust the position in the transverse direction of the rail (100). Therefore, the position of the rail 100 can be easily adjusted by changing the position of the fixing means 400 coupled to the long hole 511 without having to carry a separate spacing component on the site.

A space portion is formed between the first support portions 520, so that the first elastic member 540 accommodated in the space portion can elastically support the rail 100 in the direction of the sleeper 10 from the top.

Here, the first elastic member 540 is accommodated in the space portion of the first support 520, the bent semi-circular portion is in close contact with the upper portion of the rail foot 120 of the rail 100 to elastically support the bottom. In addition, the other extension end may be formed in the form of a clip that is bent to the outside, respectively, and settled inside the first support 520.

On the other hand, the semi-circular portion of the first elastic member 540 may be cap 550, the lower portion of the semi-circular portion, that is, the first elastic member 540 between the fixed body 510 and the rail foot 120 It may be further provided with an insulating member 560 to support the lower portion, to maintain the gap between the fixed body 510 and the rail foot 120.

The cap 550 may absorb a shock at a portion where the semicircle portion of the first elastic member 540 and the rail foot 120 contact each other, and prevent the semicircle portion of the first elastic member 540 from being worn. In addition, the insulating member 560 is positioned above the seating jaw 321 of the base plate 320.

Therefore, the second tooth 512 formed around the long hole 511 of the fixed body 510 is engaged with the first tooth 414a of the tooth washer 414 to more firmly fix the fixed body 510, the rail It is possible to prevent the phenomenon that the pressing means 500 is pushed from the height adjustment pad 200 by the lateral pressure applied to the (100). That is, the connecting plate 422 upper portion and the tooth washer 414 of the lower bracket 420 hold the upper and lower portions of the fixed body 510 does not cause a lateral push phenomenon.

Referring to the position adjustment method of the rail 100 shown in Figure 9, the lower bracket 420 is fixed to the sleeper 10, since the pressing means 500 is formed integrally, the rail 100 When the position is changed, the pressing means 500 and the rail pad 330, the base plate 320, and the elastic pad 310 under the rail 100 are integrally moved.

That is, when the nut 412 of the upper bracket 410 is loosened, the tooth washer 414 becomes loose. At this time, the first tooth 414a of the tooth washer 414 and the second tooth 512 of the fixing body 510 are loosened. Space is formed between the fixed body 510 is moved in the longitudinal direction of the long hole to adjust the position of the rail (100). As the fixed body 510 moves, the pressurizing means 500 and the rail pad 330, the base plate 320, and the elastic pad 310 under the rail 100 are integrally moved.

9 shows the moving distance of the rail 100.

In this way, even if the position adjustment of the rail 100, the rail 100 does not move in the vertical direction, there is no change in the position of the pressing means 500 in the vertical direction. Accordingly, since the elastic bearing force of the pressing means 500 is not changed, stable fastening of the component parts such as the base plate 320 and the elastic pad 310 is ensured, and the effect of increasing the lifespan and track stability of the parts can be obtained. have.

Hereinafter, embodiments of Embodiments 2 to 4 according to the present invention will be described, and repeated configurations will be omitted and described.

Example 2

As illustrated in FIGS. 11A and 11B, the fixing body 510 of the pressing unit 500 protrudes from an upper portion of the fixing body 510 and forms a through hole in the longitudinal direction of the rail 100. One second support 520-1 may be provided.

In addition, one side is fixed to the through hole of the second support portion 520-1, and the other side of the second bending member extending in a semicircular shape is provided with a second elastic member 540-1 having a clip shape to elastically support the rail 100. Can be.

Example 3

12A and 12B, the fixing body 510 of the pressing means 500 is protruded to the rail 100 side of the fixing body 510 and is fixed to the fixing body 510 side. The body 510 forms a locking step in the longitudinal direction. And a third support part 520-2 having a vertical bolt hole formed at the center thereof, and having a bolt fastened to the bolt hole formed in the third support part 520-2, a washer and a nut fastened to the bolt. Can be.

In addition, the bent semi-circular portion elastically supports the rail 100, and the other end portion is bent outwards in a fixed state between the washer and the bolt hole to support the rail 100 on both sides of the semi-circular portion The third elastic member 540-2 may be provided.

Example 4

As shown in FIGS. 13A and 13B, the fixing body 520-3 of the pressing unit 500 protrudes toward the rail 100 side of the fixing body 520-3, and has a vertical bolt at the center thereof. A fourth support part 520-3 having a ball may be provided, and a bolt fastened to the bolt hole of the fourth support part 520-3, and a washer and a nut fastened to the bolt may be provided.

In addition, the fourth elastic member in the form of a leaf spring for elastically supporting the rail 100 while one side is fixed between the washer and the upper bolt hole of the fourth support portion 520-3 and the other end is bent inward to the lower side. 540-3 may be provided.

The rail fixing device of the present invention configured as described above uses a method in which the upper and lower brackets 410 and 420 of the fixing means 400 slide. In addition, a plurality of first teeth 414a protruding under the tooth washer 414 of the upper bracket 410 and a plurality of second teeth 512 protruding outside the long hole 511 of the pressing means 500 are engaged with the rail. 100 can prevent the positional movement of the pressing means 500 by the transverse pressure. On the other hand, by the pressure distribution means 300 provided between the rail 100 and the height adjustment pad 200 to buffer the vibration and the load transmitted to the lower portion of the rail 100.

As a result, the present invention, to prevent the cracks, deformation and breakage of the rail 100, and to easily adjust the position of the rail 100 by buffering the load and vibration generated during the train operation and dispersing the lateral pressure At the same time can be firmly fastened to the rail 100 so as not to move in the lateral pressure and can improve the workability and workability of the installation work.

Configurations shown in the embodiments and drawings disclosed herein are only the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, various equivalents which may be substituted for them at the time of the present application And variations.

1 is a view showing a conventional rail fixing device.

2 is a view showing a conventional rail fixing device.

Figure 3 is an exploded perspective view showing a rail fixing device according to the first embodiment of the present invention.

4 is a perspective view of the combination according to FIG.

5 is a cross-sectional view according to FIG. 3.

Figure 6 is an exploded perspective view of the pressure distribution means according to FIG.

Figure 7 is an exploded perspective view of the pressing means according to FIG.

8 is an exploded perspective view of the fixing means according to FIG. 3.

9 is a cross-sectional view showing a state in which the rail according to FIG. 3 is moved to one side.

10 is a perspective view showing a height adjustment pad according to FIG.

11A is a sectional view of Embodiment 2 according to the present invention;

11b is a plan view according to FIG. 11a;

12A is a sectional view showing Embodiment 3 according to the present invention;

12b is a plan view according to FIG.

Fig. 13A is a sectional view of Embodiment 4 according to the present invention;

13b is a plan view according to FIG. 13a;

<Explanation of symbols for the main parts of the drawings>

      10: sleeper 100: rail

120: rail foot 200: height adjustment pad

201: fixing means through hole 202a: locking groove

202b: latch 300: pressure distribution means

310: elastic pad 320: base plate

321: Seating jaw 322: First inclined portion

330: rail pad 400: fixing means

410: upper bracket 411: bolt

411a: slide mechanism 411b: second inclined portion

412: nut 413 washer

414: tooth washer 414a: first tooth

420: lower bracket 421: fixing bar

422: connecting plate 423: third inclined portion

424: slide groove 424a: fourth inclined portion

500: pressurizing means 510: fixed body

511: long hole 512: second tooth

520: first support portion 520-1: second support portion

520-2: third support 520-3: fourth support

540: first elastic member 540-1: second elastic member

540-2: third elastic member 540-3: fourth elastic member

Claims (16)

In the rail fixing device for fixing the rail to the upper side of the sleeper 10 by elastically supporting both sides of the rail, A height adjustment pad 200 formed between the rail 100 and the sleeper 10; A pressure dispersing means (300) provided between the rail (100) and the height adjusting pad (200); At least one lower bracket 420 buried in the sleeper 10 and the upper bracket 410 is fixed to the upper bracket 410 to be attached and detached to the upper portion of the lower bracket 420 through the height adjustment pad 200 Means 400; And Pressing means 500 is fixed to the fixing means 400 on the height adjustment pad 200 to elastically support the rail 100 in the direction of the sleeper (10); Rail fixing device, characterized in that consisting of. The method of claim 1, The height adjustment pad 200, A locking groove 202b which is divided before and after in the axial direction of the rail 100 and has a locking groove 202a formed at one end of the divided side, and coupled to the locking groove 202a at the other end of the divided side. Is formed, the rail fixing device, characterized in that it comprises at least one or more fixing means through hole (201) to both sides of the rail (100). The method of claim 1, The pressure distribution means 300, At least one or more elastic pads 310 formed on the height adjusting pad 200; The first inclined portion 322 is formed on the elastic pad 310, and is inclined downward in the direction of the rail 100 opposite to the rail 100. A base plate 320 having extended seating jaws 321 formed at both sides thereof; Rail fixing device, characterized in that consisting of a rail pad 330 disposed on the base plate 320. The method of claim 1, The upper bracket 410 of the fixing means 400, A bolt 411 having a slide hole 411a formed at a lower portion thereof, It is fastened to the bolt 411, and provided with a tooth washer 414 having a plurality of first teeth (414a) formed at the bottom, The lower bracket 420 of the fixing means 400, Fixed bar 421, The rail is characterized in that it is connected to the upper plate of the fixing bar 421, the connecting plate 422 formed with at least one slide groove 424 in the longitudinal direction of the rail (100) Fixture. The method of claim 1, The pressing means 500, At least one long hole 511 having a long length in the transverse direction of the rail 100 is formed on both sides, and a plurality of second teeth 512 are formed outside the long hole 511 in the longitudinal direction of the rail 100. A fixed body 510; And a resilient member coupled to the resilient member support formed on the fixed body 510 to elastically support the rail 100. The method according to any one of claims 2, 3, and 5, The upper bracket 410 of the fixing means 400, A bolt 411 having a slide hole 411a formed at a lower portion thereof, It is fastened to the bolt 411, and provided with a tooth washer 414 having a plurality of first teeth (414a) formed at the bottom, The lower bracket 420 of the fixing means 400, Fixed bar 421, The rail is characterized in that it is connected to the upper plate of the fixing bar 421, the connecting plate 422 formed with at least one slide groove 424 in the longitudinal direction of the rail (100) Fixture. The method according to any one of claims 1, 2 and 3, The upper bracket 410 of the fixing means 400, A bolt 411 having a slide hole 411a formed at a lower portion thereof, It is fastened to the bolt 411, and provided with a tooth washer 414 having a plurality of first teeth (414a) formed at the bottom, The lower bracket 420 of the fixing means 400, Fixed bar 421, It is connected to the upper plate of the fixing bar 421 in a plate shape, the upper portion is provided with a connecting plate 422 formed at least one slide groove 424 in the longitudinal direction of the rail 100, The pressing means 500, At least one long hole 511 having a long length in the transverse direction of the rail 100 is formed on both sides, and a plurality of second teeth 512 are formed outside the long hole 511 in the longitudinal direction of the rail 100. A fixed body 510; And a resilient member coupled to the resilient member support formed on the fixed body 510 to elastically support the rail 100. The method of claim 4, wherein The connecting plate 422 is, Rail fixing device, characterized in that the third inclined portion 423 is inclined downward on the outer edge. The method of claim 6, The connecting plate 422 is, Rail fixing device, characterized in that the third inclined portion 423 is formed on the outer edge inclined downward. The method of claim 7, wherein The connecting plate 422 is, Rail fixing device, characterized in that the third inclined portion 423 is formed inclined downward on the outer edge. The method of claim 4, wherein The slide groove 424, Rail fixing device, characterized in that each having a fourth inclined portion (424a) inclined downward at the corresponding end of the groove formed in a narrow width on one side or both sides in the longitudinal direction of the rail (100). The method of claim 6, The slide groove 424, Rail fixing device, characterized in that each having a fourth inclined portion (424a) inclined downward at the corresponding end of the groove formed in a narrow width on one side or both sides in the longitudinal direction of the rail (100). The method of claim 7, wherein The slide groove 424, Rail fixing device, characterized in that each having a fourth inclined portion (424a) inclined downward at the corresponding end of the groove formed in a narrow width on one side or both sides in the longitudinal direction of the rail (100). The method of claim 8, The slide groove 424, Rail fixing device, characterized in that each having a fourth inclined portion (424a) inclined downward at the corresponding end of the groove formed in a narrow width on one side or both sides in the longitudinal direction of the rail (100). The method of claim 9, The slide groove 424, Rail fixing device characterized in that it has a fourth inclined portion (424a) inclined downward at the corresponding end of the groove formed in a narrow width on one side or both sides in the longitudinal direction. The method of claim 10, The slide groove 424, Rail fixing device, characterized in that each having a fourth inclined portion (424a) inclined downward at the corresponding end of the groove formed in a narrow width on one side or both sides in the longitudinal direction of the rail (100).

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