JP2021004514A - Rail fastening device for slab track - Google Patents

Abstract

To provide a rail fastening device for slab track that does not require the loosening of bolts when replacing a spring that holds down a lower flange of a rail, thereby preventing sand from entering an embedded plug, and that does not have components insufficient in strength resulting in breakage.SOLUTION: A rail fastening device for slab track comprises: a pair of wire springs 15A, 15B for pressing left and right lower flanges of a rail downward via an insulation material (plate-shaped insulator) to fix the rail on a track slab; and a pair of spring holding means 13A, 13B that are fixed by fixing bolts 12A, 12B that can be screwed into an embedded plug embedded in the track slab and hold the wire springs. The spring holding means are shoulders with through holes into which rear ends of the wire springs can be inserted. Lateral pressure cradles 11A, 11B are respectively inserted between a back surface of the shoulder and a side surface of a stepped section of the track slab.SELECTED DRAWING: Figure 1

Description

The present invention relates to a rail fastening device for a railroad slab track, and more particularly to a fastening device obtained by modifying a rail fastening device for a slab track called a direct connection type 4.

Conventionally, as a rail fastening device in a railroad slab track, there is a device called a direct connection type 4 rail fastening device. The slab track is a structure in which a concrete plate called a track slab is installed on a concrete roadbed and rails are laid on it.
As shown in FIG. 7, the direct-coupled 4-type rail fastening device is provided with a pair of embedding plugs 25A and 25B in a groove in the rail direction formed in the track slab at predetermined intervals with the rail R interposed therebetween. The lower flange of the rail R installed on the track slab via the 22 is pressed downward by a pair of leaf springs 18A and 18B to fix the rail R. The tip of the leaf spring comes into contact with the surface of the lower flange of the rail, and the lower flange of the rail is pressed by inserting the fixing bolts 12A and 12B through it and screwing it into the embedding plugs 25A and 25B. The rear end side is held by spring pedestals 19A and 19B made of an insulating material.

Japanese Unexamined Patent Publication No. 2017-48633

In the direct connection type 4 rail fastening device, the leaf spring may be damaged, and the damaged leaf spring needs to be replaced. At that time, the bolt holding the leaf spring is temporarily removed and the leaf spring is replaced. In addition, when replacing rails worn by a running train or when adjusting the rail surface, the bolts are loosened and the leaf springs are temporarily removed, but the freight train runs idle on the track on which the freight train runs. Since the train may run while sprinkling preventive sand, the sprinkled sand gets into the gap between the fixing bolts 12A and 12B and the embedding plugs 25A and 25B, and the bolts cannot be turned and tightened. Therefore, it may not be possible to fasten the rails.

In addition, if sand gets into the gap between the bolt and the embedding plug, the screw thread of the embedding plug may be damaged and the bolt may not be tightened firmly. Furthermore, the spring cradle that holds the rear end of the leaf spring receives lateral pressure from the rail via the leaf spring, and is gradually displaced in the longitudinal direction of the rail by receiving vibration due to repeated loads as the train runs. It may come off the side of the groove of the slab track. As a result, there is a problem that the rail may not be fixed.

Therefore, the present inventors use a wire spring clip used in a ballast track instead of a leaf spring, and insert a bolt for fixing a part called a shoulder for attaching the wire spring clip to the embedding plug. It was considered to screw in and fasten the rail. As a result, when the wire spring clip is used, the pressure from the rail is concentrated on the joint between the bolt fixing the shoulder and the shoulder, which may be damaged. Therefore, when using the wire spring clip, it is necessary to prevent the occurrence of weak points in terms of strength.

In Patent Document 1, when the strength of the screwed portion between the shoulder and the fastening bolt is insufficient in the rail fastening device using the wire spring clip, the embedding plug protrudes downward from the bottom of the shoulder on the rail side. Reinforcing boss part that fits unevenly into the opening is provided on the shoulder, and a reinforcing overhanging part that projects from the bottom of the rail side to the rail side to support the reinforcing boss part is provided on the shoulder. Inventions relating to the device are described.

The invention of Patent Document 1 is to reinforce a screwed portion with a shoulder fastening bolt, which is a strong weak point, in a rail fastening device using a wire spring clip. On the other hand, the present invention does not reinforce a strong weak point, but utilizes the characteristics unique to the rail fastening device for slab tracks to support the pressure from the rail with other parts (spring cradle). This is to solve the above-mentioned problems in the leaf spring type slab track rail fastening device after preventing the load from being concentrated and causing weak points, and the invention of Patent Document 1 is a problem. And the solution is different.

The present invention was made based on the above background, and the purpose of the present invention is that it is not necessary to loosen the bolts when replacing the spring that presses the lower flange of the rail, whereby the inside of the embedding plug is inserted. It is an object of the present invention to provide a rail fastening device for a slab track, which does not allow sand to enter the rail and does not cause parts to be damaged due to insufficient strength.
Another object of the present invention is for a slab track, which is arranged on the back of the shoulder so that the lateral pressure receiving base that receives the pressure from the rail does not shift and may come off from between the back surface of the shoulder and the side surface of the groove of the slab track. The purpose is to provide a rail fastening device.

In order to achieve the above object, the present invention
A pair of wire springs for pressing the lower left and right flanges of the rail downward via an insulating material to fasten the rail onto the track slab.
A slab track rail fastening device comprising a pair of spring holding means for holding the wire spring, which is fixed by a fixing bolt screwable to an embedding plug embedded in the track slab.
The spring holding means is a shoulder having a through hole into which the rear end of the wire spring can be inserted.
A lateral pressure receiving table is interposed between the back surface of the shoulder and the side surface of the stepped portion of the track slab.

According to the above means, it is not necessary to loosen the fixing bolt when replacing the spring that presses the lower flange of the rail, which prevents sand from getting into the embedding plug and deteriorating the embedding plug. can do. In addition, since the lateral pressure receiving base is provided on the back of the shoulder as the spring holding means, the lateral pressure from the rail is concentrated on the joint between the spring holding means and the fixing bolt, resulting in insufficient strength and damage. It can be prevented from reaching.

Here, preferably, the lateral pressure receiving table is formed so that the lateral width changes by inclining at least one side surface along the longitudinal direction of the rail.
The joint portion between the shoulder and the lateral pressure receiving table is configured to be provided with tooth portions that can mesh with each other.
According to this configuration, the lateral pressure receiving table is formed so that the lateral width changes. Therefore, by adjusting the insertion position of the lateral pressure receiving table, it is possible to prevent a gap from being generated on the back of the shoulder. The lateral pressure from the rail can be firmly received by the lateral pressure receiving base, and the load applied to the joint between the shoulder and the fixing bolt can be reduced. Further, since the tooth portion is provided at the joint portion between the shoulder and the lateral pressure receiving table, it is possible to prevent the lateral pressure receiving table from coming off from the back of the shoulder.

Further, preferably, the tooth portion and the flat vertical facing portion are formed side by side in the height direction on the surface of the lateral pressure receiving table to be joined to the shoulder.
The height of the vertical facing portion is set to be at least twice the height of the tooth portion.
On the side of the shoulder in contact with the lateral pressure receiving table, a flat end surface that can be joined to the vertical facing portion is formed.
According to this configuration, the vertical pressure receiving table is first used to determine the insertion position of the lateral pressure receiving table, and then the teeth are engaged to easily position the lateral pressure receiving table at the optimum position without creating a gap on the back of the shoulder. It can be arranged.

Also, preferably, the lateral pressure receiving table is formed so that the lateral width changes by inclining both side surfaces along the longitudinal direction of the rail.
Both sides are formed to have different angles of inclination on the same side.
The side surface of the lateral pressure receiving table to be joined to the shoulder is provided with a tooth portion that can mesh with the tooth portion of the shoulder.
According to this configuration, since both side surfaces of the lateral pressure receiving table are formed to have inclinations of different angles, the lateral pressure receiving table can be accurately arranged at the optimum position to eliminate the gap on the back of the shoulder. it can.

Further, preferably, the height of the tooth portion is set so that the tip of the tooth does not come into contact with the bottom of the groove when the node tooth portion of the lateral pressure receiving table and the tooth portion of the shoulder are engaged. Configure to.
According to the above configuration, the lateral pressure from the rail can be received not by the tooth portions but by the flat contact surfaces, so that the tooth portions can be prevented from being damaged.

Further, a reverse screw is formed on the head of the fixing bolt.
A vertical opening hole is formed in the shoulder so as to intersect the through hole, and a female screw portion that can be screwed into the reverse screw of the fixing bolt is provided below the opening hole. ,
The insulating material (plate-shaped insulator) is formed so that the lateral width changes by inclining the side surface opposite to the rail along the longitudinal direction of the rail.
The portion where the insulating material and the shoulder are joined may be configured to be provided with tooth portions that can mesh with each other.
As a result, the shoulder fixing work can be easily performed, and the lateral position of the rail can be adjusted.

According to the rail fastening device for slab tracks of the present invention, it is not necessary to loosen the bolts when replacing the spring that presses the lower flange of the rail, so that sand does not get into the embedding plug. Does not reduce the durability of the. Further, there is an effect that the lateral pressure receiving table arranged on the back of the shoulder and receiving the pressure from the rail is not displaced and may be separated from the back surface of the shoulder and the side surface of the groove of the slab track.

It is a partial cross-sectional front view which shows the structure of 1st Embodiment of the rail fastening device for a slab track which concerns on this invention. It is a top view which shows the structure of the rail fastening device for a slab track of 1st Embodiment. The details of the shoulders constituting the rail fastening device for the slab track of the first embodiment are shown. (A) is a plan view, (B) is a side view, (C) is a front view, and (D) is a cross-sectional front view. It is a figure. The details of the lateral pressure receiving table constituting the rail fastening device for the slab track of the first embodiment are shown. (A) is a plan view, (B) is a front view, (C) is a side view, and (D) is a side view. It is a cross-sectional front view. The details of the shoulders constituting the rail fastening device for the slab track according to the second embodiment are shown, (A) is a plan view, (B) is a front view, and (C) is a side view. The details of the lateral pressure receiving table constituting the rail fastening device for the slab track of the second embodiment are shown, (A) is a plan view, (B) is a front view, and (C) is a side view. It is a partial cross-sectional front view which shows the structure of the rail fastening device for the conventional direct connection type 4 slab track.

Hereinafter, embodiments of the rail fastening device for slab tracks according to the present invention will be described in detail with reference to the drawings.
(First Embodiment)
1 and 2 show the configuration of the slab track rail fastening device 10 according to the first embodiment. Further, FIGS. 3 and 4 show details of the shoulder and the lateral pressure receiving table constituting the rail fastening device 10 of the first embodiment.

The slab track rail fastening device (hereinafter, simply referred to as a fastening device) 10 of the first embodiment has a rail R at substantially the center of a groove 21 provided in the track slab 20, as shown in FIG. Is placed, and a track pad 22 and a lifting plate 23 for adjusting the height of the rail are interposed between the lower surface of the rail R and the upper surface of the track slab 20. In addition, the lifting plate 23 may not be inserted. Further, a pair of embedding plugs 25A and 25B are embedded in the track slab 20 so as to sandwich the rail R.

Fixing bolts 12A and 12B are screwed into the embedding plugs 25A and 25B, and shoulders 13A and 13B are coupled to the heads of the fixing bolts 12A and 12B to form the shoulders 13A and 13B. Cylindrical insulators (insulating materials) 14A and 14B are fitted into through holes 13a and 13b in the direction parallel to the rail. One end of clips 15A and 15B as wire springs forming a "no" shape when viewed from above is inserted into the tubular insulators 14A and 14B.

Further, plate-shaped insulators (insulating materials) 16A and 16B are arranged so as to come into contact with the left and right flange surfaces of the rail R, and the tips of the clips 15A and 15B are in contact with the upper surfaces of the plate-shaped insulators 16A and 16B. The rail is fastened to the track slab 20 by being brought into contact with each other and pressing the flange of the rail R downward through the plate-shaped insulators 16A and 16B by the spring force of the clips 15A and 15B.

Further, in the fastening device of the present embodiment, the lateral pressure receiving stands 11A and 11B having an L-shaped cross section made of an insulating material are installed in a state of being in contact with the side surface of the groove 21 of the track slab 20, and the lateral pressure receiving stands 11A and 11B are installed. When the inner side surface of the shoulders 13A and 13B comes into contact with the lower portion on the back side of the shoulders 13A and 13B, the lateral pressure acting from the rail via the shoulders 13A and 13B is received, and the shoulders 13A and 13B and the heads of the fixing bolts 12A and 12B It is configured to reduce the concentrated load applied to the joint. As can be seen from FIG. 2, the left and right side surfaces 21A and 21B of the groove 21 of the track slab 20 are formed so as to have an inclination with respect to the rail R in a plan view.

Further, on the heads of the fixing bolts 12A and 12B, reverse screws 12a and 12b forming a spiral in the direction opposite to the spiral of the male screw of the main body screwed to the embedding plugs 25A and 25B are formed, and shoulders are formed. A female screw that can be screwed with the reverse screws 12a and 12b of the fixing bolts 12A and 12B is formed on the bottom of the 13A and 13B. Further, as shown in FIG. 2, for example, a hexagonal tool engaging hole is formed on the upper surface of the fixing bolts 12A and 12B.

Further, openings 31a and 31b for inserting tools are formed above the female screws of the shoulders 13A and 13B, and the heads of the fixing bolts 12A and 12B are attached to the embedding plugs 25A and 25B. Screw until it is exposed, screw the female screws of the shoulders 13A and 13B into the reverse screws 12a and 12b, and then insert the tool through the openings 31a and 31b to insert the upper surface of the fixing bolts 12A and 12B. When the tool is turned by engaging it with the tool engagement hole of, the fixing bolts 12A and 12B enter the embedding plugs 25A and 25B, and the shoulders 13A and 13B are pushed downward by the action of the reverse screw and the track. It is configured to be fixed to the slab 20.

Further, eaves 32a and 32b extending in a direction away from the rail are formed on the upper portions of the shoulders 13A and 13B, and when pressure is received from the clips when the central portions of the clips 15A and 15B come into contact with each other. It is configured so that a sufficient reaction force can be applied to the eaves. It is also conceivable to simply enlarge the upper surfaces of the shoulders 13A and 13B without providing the eaves 32a and 32b. However, if this is done, the weight of the shoulders 13A and 13B will increase and the handleability will decrease. However, by providing the eaves 32a and 32b, the weight of the shoulders 13A and 13B will be reduced to improve the handleability. Can be improved.

Further, as shown in FIG. 2, the plate-shaped insulators 16A and 16B correspond to the inclination of the side surfaces 21A and 21B of the groove 21 of the track slab 20, and the side surfaces opposite to the rail (hereinafter, this surface is referred to as this surface). By tilting the inner surface (referred to as the inner surface) at a predetermined angle (gradient of 10: 1), the width gradually increases or decreases along the length direction (rail longitudinal direction) so as to form a wedge shape as a whole. The tooth portions 16a and 16b are provided on the inner side surface thereof, in which a plurality of grooves are formed at a predetermined pitch (for example, 10 mm).
Further, the surfaces of the shoulders 13A and 13B on the side in contact with the plate-shaped insulators 16A and 16B also have the same inclination along the longitudinal direction of the rail, and the tooth portions 33a and 33b capable of engaging with the tooth portions 16a and 16b. Is provided.

As described above, in the fastening device of the present embodiment, since the clip is used instead of the conventional leaf spring as the spring for pressing the flange of the rail, it is not necessary to loosen the bolt when replacing the spring. As a result, sand can be prevented from entering the embedding plug, and deterioration of the embedding plug can be prevented.
Further, since the lateral pressure receiving bases 11A and 11B are provided on the backs of the shoulders 13A and 13B, the lateral pressure from the rail is concentrated on the joint between the shoulders 13A and 13B and the fixing bolt, resulting in insufficient strength. It is possible to prevent damage.

Further, since the plate-shaped insulators 16A and 16B are formed so as to form a wedge shape, the lateral position of the rail is adjusted by adjusting the meshing position of the plate-shaped insulators 16A and 16B with the shoulders 13A and 13B. be able to. Specifically, the inclinations of the plate-shaped insulators 16A and 16B and the shoulders 13A and 13B are set to be, for example, 10: 1, and by moving the plate-shaped insulators 16A and 16B by 10 cm in the longitudinal direction of the rail, The lateral position of the rail can be adjusted by 1 cm.

Next, the detailed configurations of the lateral pressure receiving stands 11A and 11B and the shoulders 13A and 13B will be described with reference to FIGS. 3 and 4. Since the lateral pressure receiving stands 11A and 11B and the shoulders 13A and 13B have the same shape, only one (11A, 13A) will be described below, and the other (11B, 13B) will be described. Omit.
The lateral pressure receiving table 11A (11B) is not particularly limited, but is made of synthetic resin, and as shown in FIG. 3C, is composed of a bottom wall portion 11a and a vertical wall portion 11b, and has a cross section of approximately L. It is formed to form a character. Further, the height and the thickness are substantially the same along the length direction, and a plurality of grooves are formed on the side surface of the bottom wall portion 11a at a predetermined pitch as shown in FIG. 3A. A tooth portion 11c is provided.

The pitch of the grooves of the tooth portions 11c is set to a value smaller than the pitch of the grooves of the tooth portions 16a and 16b on the inner side surfaces of the plate-shaped insulators 16A and 16B (for example, 5 mm). Further, the inner side surface of the vertical wall portion 11b is formed so as to be vertical, and the height of the inner side surface is set to be at least twice the thickness of the bottom wall portion 11a.

Further, the outer surface of the vertical wall portion 11b, that is, the back surface of the lateral pressure receiving base 11A (11B) is inclined at a predetermined angle with respect to the side surface of the rail corresponding to the inclination of the side surfaces 21A and 21B of the groove 21 of the track slab 20. The surface on which the tooth portion 11c is provided is also formed so as to be inclined at a predetermined angle. Therefore, the lateral pressure receiving table 11A (11B) has a wedge shape in which the lateral width gradually changes along the length direction, and can cope with the variation in the gap at the back of the shoulder 13A (13B).
The inclination angle of the back surface of the lateral pressure receiving table 11A (11B) and the inclination angle of the surface on which the tooth portion 11c is provided may be the same, but in the present embodiment, the inclination angle of the back surface of the lateral pressure receiving table 11A (11B). Is set to have a gradient of 10: 1, and the inclination angle of the surface on which the tooth portion 11c is provided is set to have a gradient of 20: 1.

On the other hand, as shown in FIG. 4D, the shoulder 13A (13B) has a female screw portion 34 screwed into the reverse screw 12a (12b) of the head of the fixing bolt 12A (12B). An opening 31a for inserting a tool is formed above the female screw portion 34, and the tubular insulator 14A (a tubular insulator 14A) is formed between the female screw portion 34 and the opening 31a. A horizontal through hole 35 into which the 14B) is inserted is formed.
Then, a tooth portion 33a that meshes with the tooth portion of the plate-shaped insulator 16A (16B) is formed beside the through hole 35, and an eaves portion 32a that a clip as a wire spring abuts on the upper portion of the shoulder 13A (13B). Is formed.

Further, on the bottom of the shoulder 13A (13B), the width of the bottom wall portion 11a is substantially the same as the thickness of the bottom wall portion 11a, corresponding to the bottom wall portion 11a of the lateral pressure receiving table 11A (11B). A notch 36 having the same depth is provided, and a tooth portion 36a that can be meshed with the tooth portion 11c of the lateral pressure receiving table 11A (11B) is formed on the side surface of the notch 36. By engaging the tooth portion 11c of the lateral pressure receiving base 11A (11B) with the tooth portion 36a on the side surface of the notch 36 at the bottom of the shoulder 13A (13B), the lateral pressure receiving base 11A (11B) becomes the shoulder 13A (13B). And the side surface of the groove 21 of the track slab 20 can be prevented from coming off.

The back surface of the shoulder 13A (13B) is in contact with the inner surface of the vertical wall portion 11b of the lateral pressure receiving table 11A (11B) in the tooth portions 11c of the lateral pressure receiving table 11A (11B) and the tooth portions 36a on the side surface of the notch 36. The dimensions are set so that the tips of the teeth do not come into contact with the bottom surface of the other groove, although they mesh with each other when arranged in such a manner. As a result, the lateral pressure applied from the rail to the shoulder 13A (13B) is received by the inner surface of the vertical wall portion 11b of the lateral pressure receiving table 11A (11B), and it is possible to prevent the tooth portion from being damaged due to the load applied.

Moreover, the inner surface of the vertical wall portion 11b of the lateral pressure receiving table 11A (11B) is vertical, and its height is set to be at least twice the thickness of the bottom wall portion 11a (height of the tooth portion 11c). Therefore, with the shoulder 13A (13B) floating, the inner side surface of the vertical wall portion 11b of the lateral pressure receiving base 11A (11B) is brought into contact with the back surface thereof, and the lateral pressure receiving base 11A (11B) is brought into contact with the side surface of the groove of the track slab. ) Is moved. Then, when a position where no gap is formed is found, the fixing bolt 12A (12B) is turned to drop the shoulder 13A (13B) along the inner surface of the vertical wall portion 11b, and the tooth portion 36a is placed on the lateral pressure receiving base 11A. By engaging with the tooth portion 11c of (11B), the lateral pressure receiving table 11A (11B) can be easily arranged at an optimum position.

Further, the shoulder 13A (13B) is allowed to have a tolerance of about 2 mm, but by adjusting the arrangement position of the lateral pressure receiving table 11A (11B) as described above, the shoulder 13A (13B) has a dimensional error. If there is, of course, if the sum of the tolerance of the groove 21 of the track slab 20, the tolerance of the lateral pressure receiving base 11A (11B) and the tolerance of the shoulder 13A (13B) is within ± 2 mm, absorb them. , The lateral pressure receiving table 11A (11B) can be arranged exactly between the back surface of the shoulder 13A (13B) and the side surface of the groove 21 of the track slab 20. Moreover, as described above, by changing the slope of the inclination of the back surface of the lateral pressure receiving table 11A (11B) and the inclination of the inclination of the inner surface, fine adjustment for absorbing the above dimensional error can be performed.

(Second Embodiment)
5 and 6 show the lateral pressure receiving base 11A (11B) and the shoulder 13A (13B) constituting the fastening device according to the second embodiment.
As shown in FIG. 5, the lateral pressure receiving table 11A (11B) in the present embodiment is formed not in an L shape but in a plate shape having substantially the same thickness. The inner surface and the outer surface are formed so as to have different slopes as in the first embodiment, and the tooth portion 11c is formed not at the bottom but at the upper part of the inner surface, and the tooth portion 11c is formed. The vertical height of the tooth is set to be about half or less of the height of the flat vertical facing portion 11d underneath. The configuration other than the above is the same as that of the first embodiment.

On the other hand, as shown in FIG. 6, the shoulder 13A (13B) has a tooth portion 36a that meshes with the tooth portion 11c of the lateral pressure receiving table 11A (11B) immediately below the eaves portion 32a provided on the opposite side of the rail. Is provided, and a flat vertical surface 37a is formed below the surface. Here, the vertical height of the tooth portion 36a is set to about half the height of the vertical surface 37a below the tooth portion 36a.
Further, as in the first embodiment, when the vertical pressure receiving table 11A (11B) is arranged so that the vertical surface 37a of the shoulder 13A (13B) is in contact with the vertical surface 11b, the lateral pressure receiving table 11A (11B). The tooth portion 11c of) and the tooth portion 36a of the shoulder 13A (13B) mesh with each other, but the dimensions are set so that the tips of the teeth do not contact the bottom surface of the other groove. The configuration other than the above is the same as that of the first embodiment.

With the above configuration, also in the fastening device of the second embodiment, the lateral pressure applied from the rail to the shoulder 13A (13B) is applied to the vertical facing portion 11d on the inner surface of the vertical wall portion 11b of the lateral pressure receiving base 11A (11B). It is possible to prevent the joint portion between the receiving and shoulder 13A (13B) and the fixing bolt 12A (12B) from being damaged by applying a load.
Further, the height of the tooth portion 11c is set to be approximately half or less of the height of the vertical surface 11b, and the height of the tooth portion 36a is set to approximately half the height of the vertical surface 37a. Therefore, with the shoulder 13A (13B) floating, the vertical pressure receiving table 11A (11B) is brought into contact with the vertical surface 37a to move the lateral pressure receiving table 11A (11B) along the side surface of the groove of the track slab. Let me.
Then, when a position where no gap is formed is found, the shoulder 13A (13B) is dropped along the vertical surface 11b, and the tooth portion 36a is engaged with the tooth portion 11c of the lateral pressure receiving base 11A (11B) to receive the lateral pressure. The base 11A (11B) can be easily arranged at the optimum position.

Although the present invention has been described above based on the embodiments, the present invention is not limited to the above-described embodiments, and can be appropriately modified without departing from the spirit of the present invention. For example, in the second embodiment, the horizontal pressure receiving table 11A (11B) is formed not in an L shape but in a plate shape having substantially the same thickness. However, as in the first embodiment, the horizontal pressure receiving table is formed. The 11A (11B) is formed in an L shape, and the bottom surface of the shoulder 13A (13B) is provided with a notch in which the tip of the horizontal bottom of the lateral pressure receiving table 11A (11B) engages, and the tooth portion 11c is provided. It may be provided on the upper part of the vertical surface of the lateral pressure receiving table 11A (11B) instead of the side surface of the bottom portion.

Further, in the above embodiment, it has been explained that the lateral pressure receiving table 11A (11B) is formed of synthetic resin, but the present invention is not limited to the insulating material, and is formed by using a metal such as aluminum or FRP (fiber reinforced plastic). You may.
Further, in the above embodiment, the case where the present invention is applied to the rail fastening device for fixing the rail in the groove provided in the track slab has been described, but the present invention describes the case where the spring holding means (shoulder) is attached. It can also be used as a rail fastening device for fixing a rail to a track slab via a tie plate having a step or a convex portion on the outside.

10 Rail fastening device 11A, 11B Lateral pressure receiving stand 11a Bottom wall part 11b Vertical wall part 11c Tooth part 12A, 12B Fixing bolt 13A, 13B Shoulder 14A, 14B Cylindrical insulator 15A, 15B Clip (wire spring)
16A, 16B Plate-shaped insulators 31a, 31b Openings 32a, 32b Eaves 33a, 33b Teeth 34a, 34b Female threads 35 Through holes 36 Notches 37a Vertical facing 20 Orbital slabs 21 Grooves

Claims (6)

A pair of wire springs for pressing the lower left and right flanges of the rail downward via an insulating material to fasten the rail onto the track slab.
A slab track rail fastening device comprising a pair of spring holding means for holding the wire spring, which is fixed by a fixing bolt screwable to an embedding plug embedded in the track slab.
The spring holding means is a shoulder having a through hole into which the rear end of the wire spring can be inserted.
A rail fastening device for a slab track, characterized in that a lateral pressure receiving base is interposed between the back surface of the shoulder and the side surface of the stepped portion of the track slab. The lateral pressure receiving table is formed so that the lateral width changes by inclining at least one side surface along the longitudinal direction of the rail.
The rail fastening device for a slab track according to claim 1, wherein a tooth portion capable of meshing with each other is provided at a portion where the shoulder and the lateral pressure receiving table are joined. On the surface of the lateral pressure receiving table to be joined to the shoulder, the tooth portion and the flat vertical facing portion are formed side by side in the height direction.
The height of the vertical facing portion is set to be at least twice the height of the tooth portion.
The rail fastening device for a slab track according to claim 2, wherein a flat end surface that can be joined to the vertical facing portion is formed on the side of the shoulder in contact with the lateral pressure receiving table. The lateral pressure receiving table is formed so that the lateral width changes as both side surfaces are inclined along the longitudinal direction of the rail.
Both sides are formed to have different angles of inclination on the same side.
The rail fastening device for a slab track according to claim 2 or 3, wherein a tooth portion capable of meshing with the tooth portion of the shoulder is provided on a side surface of the lateral pressure receiving table to be joined to the shoulder. A claim characterized in that the height of the tooth portion is set so that the tip of the tooth does not come into contact with the bottom of the groove when the node tooth portion of the lateral pressure receiving table and the tooth portion of the shoulder are engaged. Item 4. The rail fastening device for a slab track according to any one of Items 2 to 4. A reverse screw is formed on the head of the fixing bolt.
A vertical opening hole is formed in the shoulder so as to intersect the through hole, and a female screw portion that can be screwed into the reverse screw of the fixing bolt is provided below the opening hole. ,
The insulating material is formed so that the lateral width changes by inclining the side surface opposite to the rail along the longitudinal direction of the rail.
The rail fastening device for a slab track according to any one of claims 1 to 5, wherein tooth portions capable of meshing with each other are provided at a portion where the insulating material and the shoulder are joined.

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