JP7649227B2 - Rail direct connection device for point machine - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act Takuya Itayama, Tatsuya Sakamoto, Yoshifumi Omachi, and Kazuhiko Oshima disclosed the rail direct connection device for YS-type electric points, which they invented, at the Proceedings of the 34th Railway Technical Forum.

The present invention relates to a rail direct connection device for a point machine installed on a railway track, and in particular to a rail direct connection device for a point machine equipped with a switch lock, which fixes the switch lock by connecting it to the rail with a connecting rod.

At the branching points of railway tracks, switches equipped with switches to change the course of vehicles are installed. There are various types of switches, one of which is the YS type electric switch, which transmits the rotational force of a motor to a tongue rail via a link to move the rail.
The YS type electric point machine is equipped with a gyrenk that supports the rotating shaft of the link arm and has a built-in tension spring, and the gyrenk is fixed to the center of the sleeper to prevent the link from wobbling and perform stable switching. Note that the gyrenk in conventional YS type electric point machines was generally fixed on the sleeper by a bolt. An invention related to a point machine equipped with a gyrenk is described in, for example, Patent Document 1.

In addition, there is an NS type electric point machine that is equipped with an operating lever that moves the tongue rail and a locking lever that checks the switching completion position of the switch.
The NS type electric point machine has a mechanism for moving the tongue rail by moving an operating rod, which is installed horizontally between the tips of a pair of tongue rails, in the axial direction by a motor in the point machine body, and is configured to check the switch completion position of the turnout and prevent the movement of the locking rod by engaging a part called a lock piece with a recess provided in the locking rod, and does not have a link or a gear. Regarding the NS type electric point machine with such a configuration, an invention has been proposed regarding a rail direct connection device that connects the point machine body to the rail by a connecting rod and fixes it (see Patent Document 2).

Japanese Unexamined Patent Publication No. 60-131362 JP 2004-19240 A

In conventional YS-type electric point machines equipped with a gyrenk, the diameter of the bolt hole in the sleeper through which the bolt that secures the gyrenk is inserted widens due to corrosion of the wooden sleeper, weakening the tightening force of the bolt, causing the gyrenk to wobble during tongue rail switching, which weakens the pressure on the protrusion of the circuit controller (on/off switch) pressed by the tongue rail, causing the indicator lamp showing the opening direction of the point machine to go out or causing tongue rail switching failure. In addition, there was an issue that the sleeper had to be replaced when the bolt hole was severely damaged due to corrosion of the sleeper.

The inventors therefore investigated a rail direct connection device that prevents shaking by connecting the gerenk to the rail with a connecting rod. However, simply providing a connecting rod is not enough to deal with cases where the sleepers corrode and bolt holes become defective. Also, to easily attach the connecting rod that connects the gerenk to the rail, it is desirable to connect the end of the connecting rod to the rail flange with a connecting part called a rail catcher. However, at major branching points where points are installed, snow melters are often attached to the side of the rail, and it became clear that there was a problem that the presence of the snow melter makes it difficult to attach the rail catcher, and the holding force is reduced by vibration, making it easier for the rail to come off the rail.

The present invention has been made with attention to the above problems, and an object of the present invention is to provide a rail direct coupling device for a point machine which can prevent the gyrenk from shaking even if the sleeper corrodes, and can prevent the indicator lamp showing the open direction from going out and the tongue rail from switching improperly.
Another object of the present invention is to provide a rail direct connection device for a point machine which can be attached even if a snow melting device is provided on the side of the rail and in which the connecting rod will not easily come off the rail.

In order to achieve the above object, the present invention provides:
A link mechanism for switching tongue rails provided at a branch point of a railway track;
A switching lock device is installed on the sleeper and fixed to the sleeper with a plurality of fixing bolts provided to penetrate the sleeper vertically, and is provided with a means for supporting the rotation shaft of the link arm of the link mechanism and for holding the tongue rail in a position after switching;
a point machine main body having a drive means installed on the outside of a base rail and for operating the link mechanism via an operating can;
A rail direct connection device for fixing the switch and lock of an electric point machine to the base rail and sleepers,
a base plate having a plurality of bolt insertion holes through which the plurality of fixing bolts can be inserted, the base plate being interposed between a lower surface of the switch lock device and an upper surface of the sleeper;
a pair of connecting rods each having one end connected to a part of the base plate and the other end having rail gripping means for gripping a flange portion of the base rail from both sides;
The multiple fixing bolts, which penetrate the sleepers vertically, penetrate the base plate and the convertible locking device and have nuts screwed into their protruding upper ends, thereby fixing the convertible locking device to the sleepers.

The rail direct connection device for a point machine having the above-mentioned configuration is equipped with a base plate (connecting plate) that is inserted between the underside of the switch lock (Gerenk) and the upper surface of the sleeper, and the switch lock and base plate are fixed to the sleeper with a fixing bolt that penetrates the sleeper while integrated. This prevents the switch lock (Gerenk) from shaking even if the sleeper corrodes, and prevents the indicator lamp showing the opening direction from going out and the tongue rail from failing to switch.

Preferably, a plurality of protrusions are formed on an edge of the base plate, protruding outward from the housing of the switch lock device and each having a bolt insertion hole,
The device is configured so that a pair of pressure plates are provided with bolt insertion holes at locations corresponding to the protrusions, and are capable of clamping a part of the housing of the convertible lock device between the base plate and the pressure plates.
With this configuration, a part of the housing of the convertible lock can be clamped between the pressure plate and the base plate (connecting plate), so that the convertible lock (Gelenk) can be prevented from shaking even if the sleeper corrodes and the bolt hole provided in the sleeper becomes defective.

Also, preferably, the plurality of bolt insertion holes provided in the base plate are formed as elongated holes that are long in a direction parallel to the rail,
The base plate is provided with a pair of vertical walls extending downwardly,
The pair of vertical walls each have a bolt hole formed therein,
One ends of the pair of connecting rods are configured to be connected by bolts that are screwed into the bolt holes.

With the above configuration, the base plate (connecting plate) has a pair of vertical walls extending downward, so even if the base plate is thin, one end of the connecting rod can be connected to the base plate with a bolt, and because the bolt insertion hole in the base plate is formed as an elongated hole, any variation in the position of the bolt holes in the sleepers can be absorbed and the base plate can be accurately fixed to the sleepers.

Also, preferably, the rail gripping means comprises:
a pair of clamps attached to the rod body of the connecting rod at a predetermined interval and having locking portions on parts of their opposing surfaces that respectively come into contact with side surfaces of the flange portions of the base rail;
a nut that can be screwed onto a male screw formed on the outer end of the rod body,
By turning the nut in the tightening direction, one of the pair of clamps is brought closer to the other clamp, so that the pair of clamps grip the flange portion of the base rail from both sides.
With this configuration, one end of the connecting rod is fixed to the rail by the rail gripping means (rail catcher), so there is no need to process the rail and fix it, and the base plate (connecting plate) and the switch locking device (Gerenk) can be easily fixed.

Further, preferably, a spacer member is provided which is fitted between the nut at the other end of the rod body and one of the pair of clamps,
The spacer member has an end portion adjacent to the one clamp, the end portion being formed with a tapered surface.
The clamp located on the inner side of the base rail among the pair of clamps has the locking portion formed as a claw portion,
Of the pair of clamps, the clamp located on the outer side of the base rail is configured so that the locking portion is formed as a step portion and a reverse tapered surface is formed at the rod insertion port closer to the spacer member.

According to the above configuration, the clamp located on the outside of the base rail has a locking portion formed as a step portion, so the rail gripping means can be attached to the rail even if a snow melting device is attached to the side of the rail. In addition, a spacer member is provided that is fitted between the nut and one of the clamps, and a tapered surface is formed on the spacer member, and a reverse tapered surface is formed on the rod insertion opening of the corresponding one of the clamps, so that the pair of clamps can firmly grip the flange portion of the rail so that the connecting rod does not easily come off the rail.

The rail direct connection device for a point machine according to the present invention can prevent the rail from shaking even if the sleeper corrodes, and can avoid the indicator lamp showing the open direction going out and the tongue rail from switching incorrectly. In addition, it can be installed even if a snow melter is provided on the side of the rail, and has the effect of preventing the connecting rod from coming off the rail.

1 is a plan view showing a configuration of a point machine to which a rail direct coupling device according to the present invention is applied. 1 is a plan view showing an embodiment of a rail direct coupling device for a point machine according to the present invention. FIG. 1A and 1B show a specific example of a connecting plate that constitutes the rail direct connection device of the embodiment, in which FIG. 1A and 1B show a specific example of a pressure plate that constitutes the rail direct connection device of the embodiment, in which FIG. 1A shows a specific example of an arm that constitutes the rail direct connection device of the embodiment, where (A) is a plan view, (B) is a front view, and (C) is a side view. 1A shows a specific example of a coupling fitting that constitutes the rail direct connection device of the embodiment, where (A) is a plan view, (B) is a front view, and (C) is a front view of a conventional coupling fitting. 1A and 1B show a specific example of a connecting rod that constitutes the rail direct connection device of the embodiment, in which FIG. 1A shows a specific example of a rail catcher provided on a connecting rod, where FIG. 1A is a front view of a general rail catcher, and FIG. 1B is a front view of a rail catcher in a rail direct connection device of an embodiment. 1 is a cross-sectional front view of a main portion showing details of a rail catcher in a rail direct connection device of an embodiment. FIG.

Below, an embodiment of a direct rail connection device for a point machine according to the present invention will be described in detail with reference to the drawings. First, the basic configuration of a YS-type electric point machine to which the direct rail connection device of the embodiment is applied will be briefly described. Figure 1 is a plan view showing a YS-type electric point machine 10 installed at a branch point of a railway track.

As shown in FIG. 1, the YS-type electric point machine 10 is equipped with a point machine body 11 that is installed on the side of the railway track across the sleepers S1 and S2 and fixed with bolts, a switch lock (switch lock) 12 that is also installed on the sleeper S2 between the left and right base rails R1 and R2 and fixed with bolts, an operating rod 13 that transmits the force of the motor in the point machine body 11 to the link mechanism (link arm 12a) of the switch lock 12, a pair of operating rods 14A and 14B that are provided between both ends of the L-shaped link 12b that is rotatably supported by the switch lock 12 and the tips of the tongue rails T1 and T2, and a pair of elbows 15A and 15B that are pin-connected to the tips of the operating rods 14A and 14B at one end and joined to the side of the tips of the tongue rails T1 and T2 at the other end.

The tip of the operating rod 13 is provided with a metal fitting 16 for pin connection with the link arm 12a, and the L-shaped link 12b is configured to rotate following the rotation of the link arm 12a caused by the axial movement of the operating rod 13. The link arm 12a is supported by the operating rod 13 so that it can rotate back and forth within a range of 90 degrees in the left and right directions, and when the link arm 12a rotates, the L-shaped link 12b rotates, and the operating rods 14A and 14B turn to move the tips of the tongue rails T1 and T2 to the left or right.

When the tip of the tongue rail T1, T2 moves, one of the protrusions of a pair of circuit controllers (on/off switches) 17A, 17B provided on the outer surface of the base rail R1, R2 is pressed and turned on, turning on one of a pair of point open direction indicator lamps (not shown). Holes are formed in the web (bottom) of the rail through which the protrusions of the circuit controllers 17A, 17B pass, and the protrusions pass through these holes from the outside and protrude to the inside of the rail. A connecting rod 18 called a point rod, which has the function of maintaining a constant rail distance, is installed between the tips of the tongue rails T1, T2. Although not shown, a gauge tie is also installed between the base rails R1, R2.

Further, although not shown, a motor and a rack and pinion mechanism for converting the rotational force of the motor into a linear moving force of the operating rod 13 are provided within the point body 11 .
On the other hand, a tension spring is built into the gear 12, one end of which is engaged with the rear end of the link arm 12a. This tension spring is stretched to its maximum at the center position of the rotation of the link arm 12a. When the spring is displaced to the left or right, the restoring force of the spring is transmitted to the operating rods 14A, 14B via the L-shaped link 12b, thereby pressing the tip ends of the tongue rails T1, T2 against the base rails R1, R2, so that the state can be maintained even if the motor is stopped after conversion.

Next, an embodiment of the rail direct connection device 20 will be described with reference to FIGS.
Fig. 2 shows the relationship between the components constituting the rail direct coupling device 20 of this embodiment and the gyrenk 12 constituting the electric point machine 10. Figs. 3 to 9 show specific examples of each component constituting the rail direct coupling device 20.
As shown in Figure 2, the rail direct connection device 20 of this embodiment includes a connection plate 21 that functions as a base that is installed on a sleeper with the sled 12 mounted thereon and fixed with bolts, a pair of pressure plates 22A, 22B that are arranged on the upper surface of both sides of the connection plate 21 and are connected to each other while sandwiching both sides of the sled 12, and a pair of connecting rods 23A, 23B that are installed between the connection plate 21 and the left and right base rails.

In addition, in this embodiment, as will be explained in detail later, the elbows 15A, 15B and the connecting fittings 16 are designed to absorb the difference in height since the installation position of the gasket 12 is raised by inserting the connecting plate 21 under the gasket 12.
The connecting plate 21 has an opening 21a in the center to reduce weight, and bolt insertion holes 21b are formed on both sides, through which claw bolts for fixing the gerenk 12 to the sleepers are inserted. The bolt insertion holes 21b are formed as elongated holes, so that they can absorb any variation in the positions of the bolt insertion holes on the sleepers. When repairing an existing gerenk in response to a failure of the bolt insertion holes provided in the sleepers, if the sleepers are not corroded, the claw bolts that were originally inserted are used as they are, and if the sleepers are corroded, the connecting plate 21 is fixed by replacing them with new claw bolts.

Furthermore, the four corners of the connecting plate 21 are provided with protruding portions 21c that protrude toward the outside of the link arm 12, and a pair of vertical wall portions 21d are provided on the left and right sides of the protruding side surface of the link arm 12a of the connecting plate 21, and the ends of the connecting rods 23A, 23B are each connected by a bolt 24.
Fig. 3 shows the details of the connecting plate 21, and Fig. 4 shows the details of the pressure plates 22A, 22B. As shown in Fig. 3(A), the protruding parts 21c at the four corners of the connecting plate 21 also have bolt insertion holes for inserting bolts for connecting the pressure plates 22A, 22B. As shown in Fig. 3(B), the connecting plate 21 is plate-shaped, and a vertical wall part 21d provided on the front end side of the connecting plate 21 is formed so as to extend downward below the upper surface of the sleeper.

As shown in FIG. 4(A), the pressure plate 22A (22B) is formed to have a shape corresponding to the side of the connecting plate 21, and like the connecting plate 21, a pair of bolt insertion holes 22a consisting of elongated holes through which bolts for fixing the gerenku 12 to the sleepers are inserted is formed in the center, and a pair of bolt insertion holes 22b through which bolts for connecting to the connecting plate 21 are inserted are formed at both ends. In addition, a hanging wall portion 22c is formed on the outer edge of the pressure plate 22A (22B) for contacting the side of the gerenku 12 for positioning, and a knurling process is applied to the center of the underside to prevent slipping. A knurling process for preventing slipping may also be provided on the underside of the connecting plate 21.

After placing the connecting plate 21 on the sleepers and placing the gerenku 12 on the top surface of the connecting plate 21, the pressing plates 22A and 22B are placed on both sides of the gerenku 12 and the bolt insertion holes 22b are aligned with the bolt insertion holes 21b at the four corners of the connecting plate 21, and then the bolts are inserted and tightened with nuts so that the gerenku 12 is fixed onto the connecting plate 21. In addition, the fixing claw bolts that are originally inserted into the sleepers are inserted into the bolt insertion holes 21b of the connecting plate 21 and the bolt insertion holes 22a of the pressing plates 22A and 22B, and the claw bolts are tightened and fixed by screwing nuts onto them.

5 shows details of the elbow 15A (15B) connected between the tip of the actuating rod 14A, 14B and the tongue rail. Of these, (A) is a plan view, (B) is a front view, and (C) is a side view.
As shown in Fig. 5(B), the elbow 15A (15B) used in this embodiment has steps 15a, 15b at its end, each having a pin hole through which a pin is inserted to connect to the actuating rod 14A, 14B. Also, as shown in Fig. 5(C), the main body of the elbow 15A (15B) has bolt insertion holes 15c, 15d through which a bolt is inserted to connect the elbow 15A (15B) to the tongue rail.

The height of the step 15a (15b) is set to a dimension corresponding to the thickness of the connecting plate 21. Specifically, if the point is to be installed on a 50N or 40N rail, the originally installed elbow is flipped over and the left and right elbows are swapped and reinstalled, and if the point is to be installed on a 40NY rail, the original elbow is replaced with an elbow with a larger step than the original. This absorbs the height discrepancy and connects the operating rods 14A, 14B to the elbows 15A, 15B, even if the connecting plate 21 is inserted under the rail 12 and the height increases, and the force acting on the operating rods 14A, 14B from the L-shaped link 12b can be transmitted to the tongue rail via the elbows 15A, 15B.

Figure 6 shows details of the connecting fitting (offset jaw) 16 attached to the tip of the operating can 13. Of these, (A) is a plan view, (B) is a side view, and (C) is a side view of a conventional connecting fitting. As shown in Figure 6 (A), the tip (right end) of the connecting fitting 16 in this embodiment has a pin hole 16a through which a pin that connects to the link arm 12a is inserted, and the tip of the operating can 13 is connected to the rear end with a bolt.

As shown in FIG. 6(B), the connecting fitting 16 used in this embodiment has an offset OS so that the center line of the gap G into which the link arm 12a is fitted is higher than the center line of the operating can 13. The amount of offset is set to the same dimension as the thickness of the connection plate 21. As shown in FIG. 6(C), the conventional connecting fitting 16' has no offset and the center line of the gap G coincides with the center line of the operating can 13. However, since the connecting fitting 16 in this embodiment has an offset, even if the connecting plate 21 is inserted under the link arm 12 and the height increases, the offset can be absorbed, and the force acting on the operating can 13 can be transmitted to the link arm 12a via the connecting fitting 16 without generating unnecessary bending stress.

7 shows the details of the connecting rod 23A (23B) installed between the sprocket 12 and the base rail. Of these, (A) is a plan view, and (B) is a front view.
As shown in FIG. 7, the connecting rods 23A, 23B constituting the rail direct connection device 20 of this embodiment include a rod body 31, flat connecting portions 32 provided at one end of the rod body 31 and connected to a pair of vertical wall portions 21d at the front end of the rail 12 by bolts 24, and rail catchers 33 provided at the other end of the rod body 31 and clamping the flange portion of the basic rail R1 (R2) from below.
By connecting the GELENK 12 to the left and right basic rails R1 (R2) with a pair of connecting rods 23A (23B) having the above-mentioned configuration, the GELENK 12 can be stabilized even if the fixing bolts become slightly loose, and the protrusions of the circuit controllers 17A and 17B can be firmly pressed during switching, turning on the opening direction indicator lamp.

8 shows the rail catchers 33 provided on the connecting rods 23A and 23B in detail. Of these, (A) is a general rail catcher, and (B) is a rail catcher used in this embodiment.
As shown in FIG. 8A, in a typical rail catcher, a pair of clamps 34A, 34B that engage with a flange portion of a rail R1 (R2) from the left and right are provided with claw portions 34a, 34b, respectively.

However, in recent years, as shown in Figure 8(B), snow melters 40 that heat the rails are often installed on the side of the rails at important branching points, and when a snow melter is installed, if the clamp 34A on the snow melter side has a claw portion 34a as shown in Figure 8(A), it will interfere with the snow melter, making it impossible to attach the rail catcher 33. It has also become clear that, in the rail catcher shown in Figure 8(A), the length of the rod body 31 on the left side of the clamp 34A is short, and therefore the installation of a snow melter makes it difficult to turn the bolt 35 that tightens and fixes the clamp 34A.

Therefore, in this embodiment, as shown in Figure 8 (B), the claw portion 34a is removed from the clamp 34A on the snow melting device 40 side, and a step is simply formed, and the end of the rod body 31 on the snow melting device side is extended and a cylindrical spacer 36 is inserted, and the clamp 34A is tightened by a bolt 35 via the spacer 36.
However, it was confirmed by vibration tests that if a step is provided instead of the claw portion, the rail catcher 33 may come off due to vibration from the rail.
Therefore, in this embodiment, as shown in FIG. 9, a tapered surface is formed at the tip of the spacer 36, and an inverse tapered surface having the same inclination angle as the tapered surface is formed at the rod insertion opening of the clamp 34A.

As described above, when using rail catcher 33 having spacer 36 with a tapered surface formed at the tip and clamp 34A with a reverse tapered surface formed at the rod insertion port, and clamp 34A is tightened by turning bolt 35, a force acts to widen the rod insertion port of clamp 34A as the tapered surface enters along the reverse tapered surface. As a result, the rod insertion port of clamp 34A deforms upward, generating a force that strongly presses the step portion against the end face of the flange portion of the rail, and it was confirmed by a vibration test that this has the function of preventing rail catcher 33 from coming off due to vibrations from the rail.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. For example, in the above embodiment, the connecting plate 21 inserted under the gerenku 12 is provided with protrusions 21c and bolt insertion holes at the four corners and uses pressure plates 22A, 22B, but it is also possible to omit the protrusions 21c and pressure plates 22A, 22B by providing a structure in which arms are extended from the connecting rods 23A, 23B to press part of the gerenku 12 against the sleepers. On the other hand, if the protrusions 21c and pressure plates 22A, 22B are provided, it is also possible to omit the claw bolts and nuts.

In the above embodiment, the rail catcher 33 provided on the connecting rods 23A and 23B is described as being equipped with the clamps 34A and 34B shown in FIG. 8(B) that have a claw portion on only one side. However, for example, at a branching point where a snow melter is not provided, a rail catcher 33 equipped with the clamps 34A and 34B shown in FIG. 8(A), each of which has a claw portion, may be used. Even in this case, both the rail catcher shown in FIG. 8(A) and the rail catcher shown in FIG. 8(B) may be prepared in advance and used depending on whether or not a snow melter is provided at the repair target.

10 Electric switch machine 11 Switch machine body 12 Switch locking device
12a Link arm 12b L-shaped link 13 Operating rod 14A, 14B Operating rod 15A, 15B Elbow 15a, 15b Step portion 16 Connecting metal fitting 17A, 17B Circuit controller 18 Connecting rod 20 Rail direct connection device 21 Connection plate 21a Opening 21b Bolt insertion hole (long hole)
21c: protrusion 21d: vertical wall 22A, 22B: retaining plate 23A, 23B: connecting rod 24: bolt 31: rod body 32: connecting portion 33: rail catcher 34A, 34B: clamp 34a, 34b: claw 35: bolt 36: spacer 40: snow melting device

Claims (5)

A link mechanism for switching tongue rails provided at a branch point of a railway track;
A switching lock device is installed on the sleeper and fixed to the sleeper with a plurality of fixing bolts provided to penetrate the sleeper vertically, and is provided with a means for supporting the rotation shaft of the link arm of the link mechanism and for holding the tongue rail in a position after switching;
a point machine main body having a drive means installed on the outside of a base rail and for operating the link mechanism via an operating can;
A rail direct connection device for fixing the switch lock of an electric point machine to the base rail and sleepers,
a base plate having a plurality of bolt insertion holes through which the plurality of fixing bolts can be inserted, the base plate being interposed between a lower surface of the switch lock device and an upper surface of the sleeper;
a pair of connecting rods each having one end connected to a part of the base plate and the other end having rail gripping means for gripping a flange portion of the base rail from both sides,
A rail direct connection device for a point machine, characterized in that the multiple fixing bolts that penetrate the sleepers vertically penetrate the base plate and the switchgear and have nuts screwed onto their protruding upper ends, thereby fixing the switchgear to the sleepers. A plurality of protrusions are formed on an edge of the base plate, protruding outward from the housing of the switch lock device and each having a bolt insertion hole;
The rail direct connection device for a point machine according to claim 1, further comprising a pair of pressure plates each having a bolt insertion hole at a position corresponding to the protrusion, and capable of clamping a portion of the housing of the switch lock device between the base plate and the pressure plates. The bolt insertion holes provided in the base plate are formed as elongated holes that are long in a direction parallel to the rail,
The base plate is provided with a pair of vertical walls extending downwardly,
The pair of vertical walls each have a bolt hole formed therein,
3. The rail direct coupling device for a point machine according to claim 1, wherein one ends of the pair of connecting rods are configured to be coupled to each other by bolts that are screwed into the bolt holes. The rail gripping means includes:
a pair of clamps attached to the rod body of the connecting rod at a predetermined interval and having locking portions on parts of their opposing surfaces that respectively come into contact with side surfaces of the flange portions of the base rail;
a nut that can be screwed onto a male screw formed on the outer end of the rod body,
4. The rail direct connection device for a point machine according to any one of claims 1 to 3, characterized in that by turning the nut in a tightening direction, one of the pair of clamps is brought closer to the other clamp, so that the pair of clamps grip the flange portion of the base rail from both sides. a spacer member fitted between the nut at the other end of the rod body and one of the pair of clamps;
The spacer member has an end portion adjacent to the one clamp, the end portion being formed with a tapered surface.
The clamp located on the inner side of the base rail among the pair of clamps has the locking portion formed as a claw portion,
5. The rail direct connection device for a point machine according to claim 4, characterized in that of the pair of clamps, the clamp located on the outer side of the base rail has the locking portion formed as a stepped portion and has a rod insertion port closer to the spacer member formed with a reverse tapered surface.

Images