JP4848568B2 - Rail reinforcing member and its mounting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reil reinforcing member which is mountable to both sides of a rail at any location of the rail without boring the rail, and to provide a method of mounting the rail reinforcing member. <P>SOLUTION: The method is composed of the following steps. In the first step, adhesives are applied to a pair of the reinforcing members which have slots extending along a longitudinal direction, and connection portions formed at both ends thereof so that a connecting projection and a connecting recess are opposed to the connecting depression and the connecting projection of a counterpart, and then the reinforcing members are stuck to both side surfaces of the rail. In the second step, U-shaped fittings composed of a bottom sides and rise pieces on both sides are prepared, the bottom of the rail is supported by the bottom side of each fitting, and the rise pieces face the reinforcing members. In the third step, a bolt is penetrated into a through hole formed at the rise piece, and the tip of the bolt is inserted into the slot. In the fourth step, the reinforcing member is pressed to the side surface of the rail by a nut screwed to the bolt, and a pressed state is maintained until the adhesive is hardened. In the last step, after the adhesion, the U-shaped fittings, the bolts, and the nuts are removed. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a rail reinforcing member for railroads, and more particularly to a rail reinforcing member that suppresses damage to the rail and prevents a damaged portion from spreading even when the rail is damaged, and a mounting method thereof.

  Rails are fatigued and damaged by repeated loads received from the wheels during train travel. Examples of this damage include shelling in which the top of the rail is recessed and black spots, a horizontal crack that occurs parallel to the longitudinal direction inside the rail, and a lateral crack that extends in the lateral direction inside the rail. If damage is found on the rails by ultrasonic diagnosis or the like, reinforcement is usually performed with a seam plate. At that time, since a hole is formed to attach the seam plate to the rail, there is a possibility that the crack may be changed and promoted. The conventional technology is not a structure that can suppress damage, but is an emergency measure. FIG. 5 shows a cross-sectional view of a rail to which a conventional seam plate is attached. The seam plate 13 is attached to both sides of the rail 2, and the bolt 3 is passed through the holes of the seam plate 13 and the rail 2 and fixed with a flat washer 5, a spring washer 6 and a nut 7.

Patent Document 1 discloses a resin seam plate containing reinforcing fibers. The joint plate is attached to the joint between the rail and the rail. A through-hole provided in the joint plate is aligned with a hole formed in the rail and fixed with a bolt. Patent Document 2 discloses a device that presses a joint plate on both sides of a rail with bolts while supporting concrete blocks on both sides of the rail for emergency treatment of rail damage. There is no need to make holes in the rail, and the joint plate is fixed from the outside. This pressing device cannot be used in places where there are no concrete blocks on both sides of the rail, such as railroad crossings.
JP-A-9-151402 JP-A-6-193002

  The object of the present invention is for a rail which can be attached at any location on both sides of the rail without cracking the rail even if the rail is damaged, and without being drilled in the rail. An object of the present invention is to provide a mounting method for a reinforcing member and a rail reinforcing member.

  In order to achieve the above object, the rail reinforcing member mounting method according to claim 1 according to the present invention is a connecting portion in which long holes provided in the longitudinal direction and connecting irregularities are opposite to each other at both ends. Applying an adhesive to a pair of reinforcing members, and attaching them to both sides of the rail, and using a U-shaped bracket made up of a bottom and rising pieces on both sides, the bottom of the rail at the bottom Supporting the rising piece to face each of the reinforcing members, passing a bolt through the through hole of the rising piece, and inserting the tip of the bolt into the elongated hole; and The reinforcing member is pressed against the side surface of the rail with a screwed nut, and the pressing state is continued until the adhesive is solidified. After the reinforcing member is bonded to the rail, the U-shaped bracket Characterized in that it comprises the steps of removing the bolts and nuts, the.

  The reinforcing member according to claim 2 according to the present invention has a long hole provided along the longitudinal direction and connecting portions whose connecting irregularities are opposite to each other at both ends. It is used for.

  According to the rail reinforcing member mounting method according to the first aspect of the present invention, since the rail reinforcing member is fixed with the adhesive, there is no need to drill the rail. Since the long hole gives a degree of freedom to the position of the bolt used when fixing the adhesive of the rail reinforcing member, it can be attached at a place where there is no concrete block on both sides of the rail or at a place where there is a sleeper. Since the connection part which has an unevenness | corrugation was provided in the both ends of the reinforcement member, even when the location which should be reinforced is short or long, it can respond to both. Since the concave and convex directions are opposite to each other at both ends, only one type of reinforcing member is required. Bonding with an adhesive can be a surface contact, not a partial contact by mechanical pressing, and can be a solid reinforcement. According to an accelerated test in which an artificial crack was given to the rail, the rail was broken after 100,000 times without a reinforcing member. No breakage occurred even after 3 million cycles with the reinforcing member attached. This indicates that the generation and progression of cracks could be suppressed. Therefore, it can be used not only for first aid but also for a long time.

  According to the reinforcing member for a rail of claim 2 according to the present invention, there is a connecting portion having an elongated hole and unevenness at both ends, which has an advantage as described in the mounting method. It can also be used as a seam plate.

  A rail reinforcing member according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a cross-sectional view showing a mounting state of a reinforcing member according to the present invention. The rail reinforcing member 1 according to the present invention is a pair of reinforcing plates attached to the left and right sides of the rail 2. The reinforcing member 1 is fixed to the rail 2 with an adhesive 4. The long hole 10 is provided at the substantially center in the vertical direction of the reinforcing member 1.

  FIG. 2 is a cross-sectional view of a state in which the rail reinforcing member 1 is pressed against both side surfaces of the rail with U-shaped metal fittings until the adhesive is solidified. The reinforcing member 1 is held so as not to move until the adhesive 4 is solidified by the mounting jig 12. The mounting jig 12 includes a U-shaped metal fitting 8 provided so as to support the bottom of the rail 2 and sandwich both ends of the pair of reinforcing members 1, a bolt 3, and a nut 7. The U-shaped bracket 8 includes a bottom 8a and left and right rising pieces 8b. The bolt 3 screwed into the through hole 9 at the upper end of the rising piece of the U-shaped bracket 8 is fixed to the U-shaped bracket 8 by two nuts 7 on both sides of the through-hole 9. One end of the bolt 3 is inserted into a long hole 10 provided along the longitudinal direction of the reinforcing member 1. If the both sides of the rail 2 are in such a state and the nut 7 in contact with the reinforcing member 1 is turned to advance toward the reinforcing member 1, the interval between the reinforcing member 1 and the U-shaped metal fitting 8 increases. The reinforcing member 1 can be pressed and fixed. The through hole 9 may be a through screw hole.

  Since the U-shaped metal fitting 8 presses the reinforcing member 1 from both sides, it is functionally a U-shaped spring. Since the rail 2 is separated from the ground by sleepers, it is easy to install the U-shaped fitting 8 by inserting it into the bottom of the rail 2. Even if the U-shaped fitting 8 is a place where a sleeper is located, the elongated hole 10 is provided in the reinforcing member 1, so that the bolt 3 can be inserted into the elongated hole 10 even if the installation position of the U-shaped fitting 8 is shifted. The long hole 10 of the reinforcing member 1 does not need to be a through hole, but if it is provided as a through hole, it can also be used when the bolt 3 as shown in FIG. The reinforcing member 1 of the present invention can be used without any problem just by entering the adhesive 4 even if the joint hole is drilled in the rail 2. The adhesive 4 is applied to the entire surface where the reinforcing member 1 contacts the rail 2. Adhesive 4 is an epoxy adhesive with little shrinkage, has an adhesive strength of 29.4 MPa or more, a curing time (time and temperature to reach 90% of final hardness) is 120 minutes (25 ° C.), and pot life ( The limit time that can be applied was 20 minutes.

  FIG. 3 is an exploded perspective view of a reinforcing member according to the present invention. In order to attach the pair of reinforcing members 1 to the rail 2, two U-shaped brackets 8, bolts 3 1 × 4 sets, nuts 7 3 × 4 sets, and plain washers 5 2 × 4 sets And used. The reinforcing member 1 is provided with a long hole 10, and connecting portions 11 of the reinforcing member 1 are provided at both ends in the longitudinal direction. The reinforcing member 1 is formed by engaging the concave and convex portions of the connecting portion 11. The concavo-convex portion of one connecting portion 11 of the reinforcing member 1 faces left, and the concavo-convex portion of the other connecting portion 11 faces right, and is opposite to each other. In order to connect the reinforcing members 1 in the front-rear direction, they are connected so as to overlap each other. In FIG. 3, the connected reinforcing members 1 are indicated by alternate long and short dash lines. The reinforcing member 1 can cope with a case where the reinforcing portion of the rail 2 is short or long. One reinforcing member 1 cannot be removed unless the adjacent reinforcing member 1 is removed. In other words, the structure is difficult to remove. In addition, the dimension of the longitudinal direction of the reinforcement member 1 was about 500 mm by the length of the width 200-240 mm of a sleeper as an example. This can be connected to the required length.

  FIG. 4 is a mounting process diagram of a reinforcing member according to the present invention. In S1, a pair of rail reinforcing members each provided with a long hole provided along the longitudinal direction and a connecting portion in which concavities and convexities for connection are opposite to each other at both ends are attached to both side surfaces of the rail with an adhesive. It is a stage attached. S2 is a stage in which the rising piece faces each of the rail reinforcing members by using a U-shaped bracket composed of the bottom and rising pieces on both sides thereof, and supporting the bottom of the rail with the bottom of the U-shaped fitting. S3 is a stage in which the bolt is passed through the through hole of the rising piece and the tip of the bolt is inserted into the long hole. S4 is a stage in which the rail reinforcing member is pressed against the side surface of the rail with the nut screwed to the bolt, and this pressing state is continued until the adhesive is solidified. S5 is a stage which removes a U-shaped metal fitting, a volt | bolt, and a nut, after a rail reinforcement member adhere | attaches a rail.

  The rail reinforcing member according to the present invention is suitable for reinforcing railroad rails.

It is sectional drawing which shows the attachment state of the reinforcement member by this invention. Example 1 It is sectional drawing which shows the state by which the reinforcement member by this invention was pressed by the U-shaped metal fitting until the adhesive solidified on the both sides | surfaces of a rail. Example 1 It is a disassembled perspective view of the reinforcement member by this invention. Example 1 It is a mounting process figure of the reinforcement member by this invention. It is sectional drawing of the rail to which the conventional seam board was attached.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reinforcing member 2 Rail 3 Bolt 4 Adhesive 5 Plain washer 6 Spring washer 7 Nut 8 U-shaped bracket 8a Bottom 8b Standing piece 9 Through hole 10 Long hole 11 Connecting part 12 Mounting jig 13 Seam plate S1-S5 Each stage

Claims (2)

A step of applying an adhesive to a pair of reinforcing members each provided with a long hole provided along the longitudinal direction and a connecting portion having concavity and convexity opposite to each other at opposite ends, and affixing to both sides of the rail; ,
Using a U-shaped bracket consisting of a base and rising pieces on both sides thereof, and supporting the bottom of the rail with the base, so that the rising pieces face each of the reinforcing members;
Inserting a bolt through the through hole of the rising piece and inserting the tip of the bolt into the elongated hole;
Pressing the reinforcing member against the side surface of the rail with a nut screwed to the bolt, and continuing this pressing state until the adhesive is solidified;
And a step of removing the U-shaped metal fitting, bolt and nut after the reinforcing member is bonded to the rail. A rail reinforcing member having a long hole provided along the longitudinal direction and a connecting portion having connecting concavities and convexities opposite to each other at both ends, wherein the reinforcing member is used in the mounting method according to claim 1. .

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