JP2015010442A - Rail fastening structure of rail joint part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rail fastening structure of a rail joint part capable of fastening a rail to a seating face type sleeper, by securing an insulation state between the sleeper and the rail.SOLUTION: A rail fastening structure 100 of a rail joint part fastens a joint of a connected rail to a sleeper 40 by sandwiching the rail 10 placed by connecting an end part 10a on the seat face type sleeper 40 from both sides by a pair of joint plates 20, and comprises an insulation pad 1 interposed between the sleeper 40 and the rail 10, a presser member 2 placed in a state of placing a locking end part 2d on a locking surface 21a formed on the joint plate 20, an insulation member 3 placed on an upper surface of the presser member 2 and a clip 4 having one end 4a installed in a clip fixing part 41 fixed to the sleeper 40 and having the other end 4b for pressing the presser member 2 downward via the insulation member 3. The insulation pad 1 is provided with an insulation sheet part 1a extending to both sides of the rail 10 and interposed between the sleeper 40 and the presser member 2.

Description

  The present invention relates to a rail fastening structure of a rail joint portion, and relates to a rail fastening structure for fastening a joint portion connecting rails using a joint plate to a sleeper.

  Conventionally, a metal member called a seam plate is disposed between the end side surfaces of adjacent rails at a rail rail connection location, and the rail seam portion on which the seam plate is disposed is provided. A rail fastening structure that is fastened to a tie plate on a sleeper by a metal leaf spring is known (for example, see Patent Document 1).

A rail fastening structure is also known in which a rail joint is fastened to a tie plate using a so-called panda roll clip.
For example, in the rail fastening structure shown in FIG. 8, the ends of the rails 10 are brought together on a tie plate 60 fixed to the sleeper 50 by bolts B and nuts N, and a metal joint is provided between the side surfaces of the ends of the rails 10. After placing the rail 10 so as to straddle the plate 20, the tip of the metal pressing member 22 is put on the lower edge portion 21a of the groove portion 21 formed on the side surface of the joint plate 20. The pressing member 22 is pressed downward by the metal clip 4 attached to the shoulder portion 61 on the tie plate 60, and the rail 10 is pressed against the tie plate 60 together with the joint plate 20 to tie the rail joint portion. 60. A track pad 11 is provided between the rail 10 and the tie plate 60.

JP 2004-263690 A

By the way, a signal current is passed through each of the pair of left and right rails 10, and the traveling position of the train is detected in response to the passing train short-circuiting the left and right rails 10. The left and right rails 10 must be insulated on the sleepers 50.
And in the case of the wooden sleeper 50 used so far, even if the rail 10 is fixed to the metal tie plate 60 via the metal joint plate 20, the pressing member 22, the clip 4, etc., Since the tie plate 60 on which the rail 10 is mounted is a separate body on the left and right and the sleepers 50 are made of wood, there is no problem because the left and right rails 10 are insulated on the sleepers 50. However, PC sleepers that have become mainstream in recent years have impurities in the concrete, reinforcing bars, and the like, so that the sleepers themselves are conductive. Therefore, in order to insulate the rails 10 from the PC sleepers, insulation between the tie plate 60 and the PC sleepers. It is necessary to take measures such as placing a board.
In addition, even when the fastening structure in which the joint plate 20 attached to the rail 10 is pressed by the clip 4 via the pressing member 22 is applied to a seat-type PC sleeper that does not use a tie plate, the rail 10 is short-circuited. It is necessary to take some kind of insulation measures so as not to occur.

  The present invention has been made in view of the above problems, and has a rail fastening structure for a rail joint that can secure an insulating state between a seat-type sleeper and a rail and fasten the rail to the sleeper. The purpose is to provide.

In order to achieve the above object, the present invention provides:
A rail joint structure of a rail joint part that fastens a rail joint, which is sandwiched from both sides by a pair of seam plates, and is connected to the sleeper, with rails placed end to end on a bearing surface sleeper. ,
An insulating pad interposed between the sleepers and the rails;
A holding member placed in a state where a part is placed on the locking surface formed on the joint plate, and
An insulating member placed on the upper surface of the pressing member;
One end is attached to the clip fixing portion fixed to the sleeper, and the other end includes a clip that presses the pressing member downward through the insulating member,
The insulating pad is provided with an insulating sheet portion extending on both sides of the rail and interposed between the sleepers and the pressing member.
Therefore, according to this rail fastening structure, even if the joint plate, the pressing member, and the clip are made of metal and have conductivity, the insulation state between the rail and the sleeper is obtained by interposing the insulating pad. While maintaining, the joint part which connected the rail using the joint board can be fastened to the seat-type sleeper.

Also, preferably
The rail-side edge of the lower surface of the pressing member placed on the insulating sheet portion is formed in a curved surface.
In other words, since the edge of the lower surface of the pressing member is formed into a curved surface (R shape) and the lower edge of the pressing member is prevented from biting into the insulating sheet portion, It can prevent that an insulating sheet part is torn and a press member contacts a sleeper, and can maintain the insulation state between a rail and a sleeper.

Also, preferably
The insulating sheet portion has a pair of sheet end portions that extend in a direction away from the rail and sandwich the clip fixing portion.
In other words, the movement of the insulating pad placed on the sleeper with the pair of insulating sheet portions sandwiching the clip fixing portion is restricted by the clip fixing portion and can be arranged in the longitudinal direction of the rail or in the longitudinal direction of the sleeper. Since it does not shift | deviate, the insulation state between the rail and sleepers by an insulation pad can be maintained.

Also, preferably
The pressing member is placed on the insulating sheet part with a gap in a substantially U shape in plan view between the clip fixing part and the clip fixing part,
A part of the insulating member is fitted in the gap.
In other words, a part of the insulating member is fitted in a gap that is substantially U-shaped in a plan view provided between the pressing member and the clip fixing portion, thereby restricting the movement of the pressing member and the insulating member. Accordingly, since the holding member and the insulating member are not displaced in the longitudinal direction of the rail and the longitudinal direction of the sleepers, the insulation state between the rails and the sleepers by the rail fastening structure can be maintained.

  ADVANTAGE OF THE INVENTION According to this invention, the insulation state between a seat-type sleeper and a rail can be ensured, and a rail can be fastened to a sleeper.

It is a top view which shows a left-right paired rail which has fastened the rail joint part to the sleeper. It is a front view showing a pair of left and right rails that fasten rail joints to sleepers. It is a top view which shows the rail fastening structure of a rail joint part. It is a front view which shows the rail fastening structure of a rail joint part. It is the top view (a) which shows an insulation pad, and the side view (b) from the arrow b direction of Fig.5 (a). It is a perspective view which shows a pressing member. It is the top view (a) which shows a pressing member, the side view (b) from the arrow b direction of Fig.7 (a), and the side view (c) from the arrow c direction of Fig.7 (a). It is a front view which shows the conventional rail fastening structure.

Hereinafter, with reference to drawings, an embodiment of a rail fastening structure of a rail joint part concerning the present invention is described in detail.
The rail fastening structure of the rail joint portion of the present embodiment has a function of fastening a joint portion connecting the rails using a joint plate to a seat-type sleeper while maintaining an insulating state between the rail and the sleeper. .

FIG. 1 is a plan view showing a pair of left and right rails in which rail joints are connected to sleepers by connecting rails from both sides with a pair of joint plates, and FIG. 2 is a front view.
FIG. 3 is a plan view of a rail fastening structure 100 (hereinafter simply referred to as a rail fastening structure 100) of a rail joint portion, showing one side of a pair of rails in an enlarged manner, and FIG. 4 is a front view.

As shown in FIGS. 1 to 4, the rail 10 placed with the end 10 a on the seat-type sleeper 40 together is connected by being sandwiched from both sides by a pair of joint plates 20, 20. A seam is formed. The joint plate 20 is a metal member, is arranged so as to straddle the side surfaces of the rails 10 and 10 to be connected, and is disposed on both sides of the rail 10.
Specifically, two through holes (not shown) are provided on the end 10 a side of the rail 10, and four through holes (not shown) are provided in the joint plate 20. The seam plate 20 is arranged on the side surface of the rail 10 where the end portions 10a are attached so that the rail 10 and the through hole of the seam plate 20 are aligned, and the bolt 31 is inserted into the continuous through hole. Bolts 31 are inserted through the rail 10 from the plate 20 side to the other seam plate 20 side. After attaching the spring washer 32 to the bolt 31 protruding to the other joint plate 20 side, the nut 33 is screwed into the bolt 31 to form the rail joint.

As shown in FIG. 1, in both the left and right rails 10, bolts 31 and nuts 33 are attached to the four joint portions of the rails. Bolts 31 are inserted in four through holes along the longitudinal direction of the rail 10 in alternate directions so as to be alternately arranged on the left and right sides of the rail 10.
Further, a groove portion 21 along the longitudinal direction of the joint plate 20 is provided on the side surface of the joint plate 20 at the joint portion of the rail, and the lower edge of the groove portion 21 locks the tip of the pressing member 2 described later. The end 2d is a locking surface 21a on which the end 2d is placed.

A rail fastening structure 100 that fastens such a rail joint to a seat-type sleeper 40 that does not use a tie plate will be described below.
As shown in FIGS. 1 to 4, for example, the rail fastening structure 100 is partially provided on the insulating pad 1 interposed between the sleepers 40 and the rail 10 and the locking surface 21 a formed on the joint plate 20. The pressing member 2 placed in a state where it is placed, the insulating member 3 placed on the upper surface of the base 2a (see FIG. 6) of the holding member 2, and the clip fixing portion 41 fixed to the sleeper 40 A clip 4 or the like that is attached and presses the pressing member 2 downward through the insulating member 3 is provided.

The sleeper 40 is, for example, a sleeper (PC sleeper) made of prestressed concrete, and a reinforcing bar is disposed therein.
A shoulder which is a metal member is embedded in the sleeper 40 in advance at a predetermined position, and the clip fixing portion 41 at the upper end of the shoulder is fixed in a state of being exposed on the upper surface of the sleeper 40.
The clip fixing portions 41 have a substantially rectangular shape in plan view, are provided on both sides of the rail 10, and are provided at a total of four locations on the sleepers 40.
An attachment hole 41 a (see FIG. 4) penetrating in the longitudinal direction of the rail 10 is formed in the clip fixing portion 41, and one end 4 a of the clip 4 is inserted into the attachment hole 41 a, and the clip 4 is inserted into the clip fixing portion 41. Is attached.

The insulating pad 1 is a member made of an insulating resin material such as rubber. For example, as shown in FIGS. 3, 4, 5 (a) and 5 (b), the insulating pad 1 is interposed between the sleepers 40 and the rails 10. A pad main body 1d that is a relatively thick portion to be mounted, and an insulating sheet portion 1a that extends from the pad main body 1d to both sides of the rail 10 and is interposed between the sleepers 40 and the pressing member 2 are provided. ing. Further, the insulating sheet portion 1a has a pair of sheet end portions 1b, 1b extending in a direction away from the rail 10 and sandwiching the clip fixing portion 41, and the insulating pad 1 has a substantially H shape in plan view. Presented. The distance between the pair of sheet end portions 1b, 1b that are separated in the direction along the longitudinal direction of the rail 10 is formed to be approximately the same as the width of the clip fixing portion 41 along the longitudinal direction of the rail 10.
That is, the insulating pad 1 is placed on the sleeper 40 so as to sandwich the clip fixing portions 41 on both sides of the rail 10 with a pair of sheet end portions 1b and 1b provided on the insulating sheet portion 1a. The movement of 1 is restricted by the clip fixing portion 41 so that the arrangement is not shifted in the longitudinal direction of the rail 10 or the longitudinal direction of the sleepers 40.

The corner 1c where the edge along the longitudinal direction of the rail 10 in the insulating sheet 1a of the insulating pad 1 and the edge of the sheet end 1b intersect is formed in a shape that changes gently so as to form a curved surface, for example. For example, the corner 1c is formed in an R shape of R5 mm.
For example, when the insulating pad 1 is likely to be displaced as the rail 10 moves, the insulating sheet portion 1a and the sheet end portion 1b of the insulating pad 1 come into contact with the clip fixing portion 41, and movement thereof is restricted. At that time, the corner 1c where the insulating sheet 1a and the sheet end 1b of the insulating pad 1 intersect is formed in a gently changing shape such as a curved surface, so that it is difficult for cracks to enter from the corner 1c. Therefore, the insulating pad 1 is not easily damaged.
For example, if the corner is not an R shape but has an angular shape where the load is likely to concentrate, a notch is formed at the corner due to stress concentration, which tends to be the beginning of a crack. In FIG. 1, the corner 1c is formed in an R shape (curved surface).

The pressing member 2 is a metal member and is placed on the insulating sheet portion 1a of the insulating pad 1 as shown in FIGS. 3, 4, 6, 7A, 7B, and 7C, for example. And a locking end portion 2d provided on the upper portion of the standing portion 2c rising from the base portion 2a.
The base portion 2a of the pressing member 2 has a pair of bottom end portions 2b, 2b arranged at positions sandwiching the clip fixing portion 41, and has a substantially U shape in plan view. Then, the pressing member 2 is placed on the insulating sheet portion 1a with a gap between the clip fixing portion 41 and a substantially U shape in plan view.
The locking end 2d of the pressing member 2 is a portion that is placed on the locking surface 21a formed on the side surface of the joint plate 20, and the lower surface of the locking end 2d is in close contact with the locking surface 21a. It has become.

In the pressing member 2, the bottom surface of the pair of bottom end portions 2b, 2b in the base portion 2a is in contact with the insulating pad 1 (insulating sheet portion 1a, sheet end portion 1b), and the standing portion 2c side of the base portion 2a is in the insulating pad 1. It is arrange | positioned in the state slightly separated from.
Since the standing portion 2c side of the base portion 2a is separated from the insulating pad 1, the base portion 2a can be bent when the pressing member 2 is pressed by the clip 4 through the insulating member 3, and the seam plate 20 can be locked. The pressing member 2 can transmit the pressing force by the clip 4 to the joint plate 20 while suitably maintaining the engagement between the surface 21 a and the locking end 2 d of the pressing member 2.

Moreover, the edge of the lower surface of the base portion 2a of the pressing member 2 is formed in a curved surface, for example, an R shape of R3 mm, as shown in FIGS.
Since the edge of the lower surface of the base portion 2a of the pressing member 2 placed on the insulating sheet portion 1a is formed in a gently changing shape such as a curved surface, the edge of the base portion 2a becomes the insulating pad 1 (insulating sheet portion). It is designed to suppress biting into 1a), and the insulating pad 1 is hardly damaged.
For example, if the edge of the lower surface of the base portion 2a is rounded, the edge of the base portion 2a is in contact with the insulating pad 1 (insulating sheet portion 1a) and easily bites into the insulating pad 1 (insulating sheet portion 1a). May end up. Therefore, by applying R processing or the like to the edge of the lower surface of the base portion 2a and making the edge of the base portion 2a rounded, the edge makes surface contact with the insulating pad 1 (insulating sheet portion 1a), Intrusion into the insulating pad 1 (insulating sheet portion 1a) is suppressed.

The insulating member 3 is made of an insulating resin material such as nylon.
In a state in which a part of the insulating member 3 is inserted into a gap between the base 2a of the pressing member 2 and the clip fixing portion 41 and has a substantially U shape in plan view, the insulating member 3 is It is placed on the upper surface of the pressing member 2.
For example, on the lower surface side of the insulating member 3, a projection having a substantially U-shape in plan view corresponding to the gap shape between the base portion 2 a and the clip fixing portion 41 is formed, and the protrusion is connected to the base portion 2 a and the clip fixing portion. The insulating member 3 can be attached to the upper surface of the pressing member 2 by being fitted into the gap between the insulating member 3 and the pressing member 2.
Then, when a part of the insulating member 3 is fitted in a gap formed between the base portion 2a of the pressing member 2 and the clip fixing portion 41 and having a substantially U shape in plan view, the pressing member 2 and the insulating member 3 regulates mutual movement, so that the pressing member 2 and the insulating member 3 are not displaced in the longitudinal direction of the rail 10 and the longitudinal direction of the sleepers 40.

The clip 4 is a metal wire spring clip (pandroll clip), and is formed so as to exhibit a substantially “-” shape in plan view.
One end 4 a of the clip 4 is inserted into the mounting hole 41 a of the clip fixing portion 41 and the clip 4 is attached to the clip fixing portion 41, and the other end 4 b of the clip 4 abuts on the insulating member 3. At this time, since the clip 4 is deformed against the elastic force, the other end 4b of the clip 4 presses the insulating member 3 downward by the action of restoring the clip 4.
That is, the clip 4 attached to the clip fixing portion 41 presses the pressing member 2 downward via the insulating member 3.

Next, a procedure for fastening the rail 10 to the sleeper 40 using the rail fastening structure 100 according to the present invention will be described.
First, the insulating pad 1 is arranged between the pair of left and right clip fixing portions 41, and the insulating pad 1 is placed on the sleeper 40 so that the clip fixing portion 41 is sandwiched between the sheet end portions 1b and 1b provided on both sides of the insulating pad 1. Is placed.
Next, the end portions 10a of the rails 10 are brought together on the insulating pad 1 placed on the sleepers 40, and the rails 10 are sandwiched and connected by a pair of joint plates 20 and 20 from both sides.

Next, the pressing member 2 is placed on the insulating sheet portion 1 a of the insulating pad 1 so that the locking end portion 2 d of the pressing member 2 is placed on the locking surface 21 a formed on the side surface of the joint plate 20. . At this time, the pair of bottom end portions 2 b, 2 b of the pressing member 2 are disposed at positions sandwiching the clip fixing portion 41, and the pressing member 2 exhibits a substantially U shape in plan view with the clip fixing portion 41. The gap is placed on the insulating sheet 1a.
Next, a part of the insulating member 3 is inserted into a gap formed between the clip fixing portion 41 and the pressing member 2 and having a substantially U shape in plan view, and the insulating member 3 is placed on the upper surface of the pressing member 2. To do.

Next, one end 4 a of the clip 4 is inserted into the attachment hole 41 a of the clip fixing portion 41, and the clip 4 is attached to the clip fixing portion 41. When the one end 4 a of the clip 4 is inserted into the mounting hole 41 a of the clip fixing portion 41, the clip 4 is elastically deformed by the other end 4 b of the clip 4 riding on the insulating member 3. As the clip 4 is restored, the other end 4 b of the clip 4 presses the pressing member 2 downward through the insulating member 3.
Then, the pressing member 2 pressed downward by the restoring force of the clip 4 presses the joint plate 20 downward, thereby pressing the rail 10 together with the joint plate 20 toward the sleeper 40, so that the rail 10 is sleepered. 40.
By assembling the rail fastening structure 100 on the sleeper 40 in such a procedure, the rail 10 to which the end portion 10a is connected by the pair of joint plates 20 can be fastened to the sleeper 40.

As described above, according to the rail fastening structure 100 of the present embodiment, the rail 10 to which the end 10a is connected by the pair of joint plates 20 can be fastened to the seat-type sleeper 40.
Since the rail 10 connected by the joint plate 20 and the pressing member 2 that presses the joint plate 20 downward are placed on the insulating pad 1 (insulating sheet portion 1a), the rail 10 and the joint plate 20 are provided. The pressing member 2 is insulated from the sleepers 4. Moreover, since the insulating member 3 is mounted between the clip 4 attached to the clip fixing | fixed part 41 on the sleeper 40, and the pressing member 2, and the clip 4 and the pressing member 2 are insulated, Again, the holding member 2 is insulated from the sleepers 4.
That is, the rail 10 fastened to the sleeper 40 is insulated from the sleeper 40 by the rail fastening structure 100 of the present embodiment.
As described above, the rail fastening structure 100 of the present embodiment has the rail 10 by interposing the insulating pad 1 even when the joint plate 20, the pressing member 2, and the clip 4 are made of metal and have conductivity. The joint portion connecting the rails 10 using the joint plate 20 can be fastened to the seat-type sleeper while maintaining the insulation state between the sleeper 40 and the sleeper 40.

  Moreover, since the edge of the lower surface of the base part 2a of the pressing member 2 is formed in a curved surface and the edge of the base part 2a is prevented from biting into the insulating pad 1 (insulating sheet part 1a), the pressing member 2 Since it can prevent that the insulating pad 1 is torn at the edge of the base 2a and the pressing member 2 contacts the sleeper 40, the insulation state between the rail 10 and the sleeper 40 can be maintained. .

  Further, since the insulating pad 1 whose movement is restricted by the clip fixing portion 41 is not displaced in the longitudinal direction of the rail 10 or the longitudinal direction of the sleeper 40, the rail 10 and the sleeper 40 by the insulating pad 1 are prevented. The insulation state between the two can be maintained.

  In addition, since the insulating member 3 is partially inserted into a gap that is provided between the pressing member 2 and the clip fixing portion 41 and has a substantially U shape in plan view, the pressing member 2 and the insulating member 3 are mutually connected. Since the holding member 2 and the insulating member 3 are arranged in the longitudinal direction of the rail 10 and the longitudinal direction of the sleeper 40, the rail 10 and the sleeper by the rail fastening structure 100 are regulated. An insulation state between 40 can be maintained.

In the above embodiment, a PC sleeper has been described as an example of the seat-type sleeper 40. However, the present invention is not limited to this, and the present invention is not limited to this. If the rail fastening structure 100 according to the invention is applied, the joint portion connecting the rails 10 using the joint plate 20 can be fastened to the sleepers 40 while maintaining the insulation state between the rails 10 and the sleepers 40. .
In addition, it is needless to say that other specific detailed structures can be appropriately changed.

DESCRIPTION OF SYMBOLS 1 Insulation pad 1a Insulation sheet | seat part 1b Sheet | seat edge part 2 Presser member 2a Base part 2b Bottom end part 2c Standing-up part 2d Locking end part 3 Insulating member 4 Clip 4a One end 4b Other end 10 Rail 10a End part 20 Seam plate 21a Locking Surface 40 Sleeper 41 Clip fixing part 41a Mounting hole 100 Rail fastening structure (rail fastening structure of rail joint)

Claims (4)

A rail joint structure of a rail joint part that fastens a rail joint, which is sandwiched from both sides by a pair of seam plates, and is connected to the sleeper, with rails placed end to end on a bearing surface sleeper. ,
An insulating pad interposed between the sleepers and the rails;
A holding member placed in a state where a part is placed on the locking surface formed on the joint plate, and
An insulating member placed on the upper surface of the pressing member;
One end is attached to the clip fixing portion fixed to the sleeper, and the other end includes a clip that presses the pressing member downward through the insulating member,
The rail fastening structure of the rail joint portion, wherein the insulating pad is provided with an insulating sheet portion extending on both sides of the rail and interposed between the sleeper and the pressing member. .   The rail fastening structure of the rail joint portion according to claim 1, wherein the rail-side edge of the lower surface of the pressing member placed on the insulating sheet portion is formed in a shape forming a curved surface. .   The rail fastening structure of a rail joint portion according to claim 1 or 2, wherein the insulating sheet portion has a pair of sheet end portions extending in a direction away from the rail and sandwiching the clip fixing portion. . The pressing member is placed on the insulating sheet part with a gap in a substantially U shape in plan view between the clip fixing part and the clip fixing part,
The rail fastening structure for a rail joint according to any one of claims 1 to 3, wherein a part of the insulating member is fitted into the gap.

Images