JPH09151403A - Fishplate for rail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the generated quantity of flexure caused by bending load while being lightweight so as to improve workability and durability by forming a fishplate for a rail of thermosetting resin, and forming the whole fiber of a surface layer of carbon fiber. SOLUTION: A rail fishplate 10 provided across both side faces of a rail joint for a railway track or the like is formed of fiber-reinforced thermosetting resin, and the whole fiber of its surface layer 10a is to be carbon fiber. As the thermosetting resin, saturated polyester resin, vinyl ester resin, or the like is suitable. As reinforcing fiber, carbon fiber is used for the whole surface layer 10a, and glass fiber or the like is used for a center part 10b excluding the surface layer. It is desirable that the thickness of the surface layer 10a reinforced by carbon fiber is 5-10mm. Conductivity is therefore excellent, the modulus of elasticity can be improved, rigidity is improved, and particularly a fatigue characteristic is excellent so as to obtain proof stress of about twice the number of fatigue cycles of a conventional one.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a track joint member such as a rail.

[0002]

2. Description of the Related Art Conventionally, a so-called track joint member made of steel, which is provided across both side surfaces of a joint and is fastened with bolts, has been used for connecting rail joints of railroad tracks and the like. There is.

As described above, this track joint member has been made of steel, which is the same material as rails and the like from the beginning, but the weight per unit is about 14 kg, which is very heavy. As a result, there was a problem that the workability of mounting on site was poor, and this required a lot of man-hours.

In order to solve the above problems, in recent years, the orbital seam member is formed of a thermosetting resin reinforced with fibers (glass fiber is generally used), and is attached with a light weight. Those having excellent workability have been developed (Japanese Patent Application Laid-Open No. 50-47302, Japanese Patent Application Laid-Open No. 7-14).
Reference 5601).

[0005]

However, when the track joint member made of thermosetting resin reinforced with fibers as described above is attached to the joint between the rails and a load equivalent to that at the time of passing the train is applied. A bending load acts on the orbital seam member to cause bending. That is, a tensile load is applied below the orbital seam member and a compressive load is applied above.

When the above-described load is repeatedly applied about 200,000 times, cracks are generated below the orbital joint member due to the cutting of the glass fiber, and above the orbital joint member. Has a problem that a destruction phenomenon occurs due to buckling.

[0007] Further, the rail disposed at the installation location of the traffic light and the railroad crossing alarm needs to form an electric circuit in a certain section including the traffic light and the railroad crossing alarm, but a seam reinforced with glass fiber There is a problem that the member does not conduct electricity.

The present invention has been made in view of the above problems, and an object thereof is to eliminate these problems and replace the conventional reinforcement with glass fiber or the like. In particular, by using carbon fiber having excellent strength characteristics, it is excellent in conductivity, reduces the amount of bending generated by bending load, is lightweight, has good workability, and provides a more durable seam member for raceways. Is.

[0009]

In the track seam member of the present invention, the track seam member is made of a fiber-reinforced thermosetting resin provided on both sides of a seam of a rail of a railroad track or the like. A raceway joint member, characterized in that at least the fibers of at least the surface layer of the joint member are carbon fibers.

As the thermosetting resin used for forming the raceway joint member of the present invention, unsaturated polyester resin, epoxy resin, vinyl ester resin, phenol resin and the like are suitable.

As the fiber for reinforcement, carbon fiber is used for all the surface layers of the raceway joint member, and glass fiber, aramid fiber, acrylic fiber, vinylon fiber, etc. are used for the central portion excluding the surface layer. The carbon fibers may be used in combination, or they may be used in combination, or carbon fibers may be used entirely in the central portion from the surface layer.

Examples of the fiber form for reinforcing these include roving, chopped strand mat, continuous strand mat, and roving cloth, and these may be used in combination.

The thickness of the surface layer reinforced by the carbon fiber of the present seam member is 5 mm to 30 mm, but it is 5 mm to considering sufficient strength and cost.
10 mm is the most preferable.

[0014]

In the track joint member of the present invention, since at least the surface layer of the joint member is reinforced with carbon fiber, the conductivity is excellent, the amount of bending caused by bending load is reduced, and the workability is light. It was possible to make the product more durable and more durable.

That is, by reinforcing the surface layer with carbon fibers, the elastic modulus is improved and the rigidity is significantly improved as compared with the conventional reinforcement using only glass fibers or the like, and as a result, especially the fatigue characteristics are significantly improved. In addition, the durability was about twice as high as that of the conventional one.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an example of a track seam member of the present invention, and FIG. 2 is a sectional view taken along line AA of FIG. 1 and 2, the track joint member 1
0 indicates that the surface layer 10a is reinforced with carbon fiber and the central portion 10
b is formed by a thermosetting resin reinforced with glass fiber.

The outer shape of the track joint member 10 is as follows.
One side surface is an abutting surface 11 that comes into contact with the side surface of the rail in conformity with the side surface shape of the rail, and a recess 12 for accommodating a bolt or a nut is provided on the opposite side.

Further, this track joint member 10 is shown in FIG.
And, as shown in the BB cross-sectional view of FIG. 3 of FIG. 4, the rails 1 and 2 are mounted across both ends of the joint,
The shape is symmetrical when the rails 1 and 2 are opposed to each other.

Rails 1 and 2 of the track joint member 10
Is fastened to the bolt holes 13, 13 ...
· Twisted bolts 3, 3, · · are passed through the through hole 4 in the rail via the washer 3b, and tightened with the nut 3a on the opposite side via the washer 3b.

The track seam member 10 of the present embodiment is
It has a length L of 560 mm, a height H of 105 mm, and a total thickness T of about 55 mm, and is manufactured by forming into a shape almost the same as that of a steel 50 kg N-type rail currently used. .

In forming the track seam member 10, a liquid thermosetting resin mixed with a curing agent is impregnated with reinforcing fibers, and the reinforcing fibers are introduced into a molding die and heated so that the longitudinal direction of the die is increased. It is carried out by pulling it out to a hardened material and cutting it to a predetermined length. The bolt holes can be formed by post processing.

When the track seam member 10 is reinforced by the molding method described above with the central portion 10b made of glass fiber and the surface layer 10a made of carbon fiber having a thickness of 5 mm, the bending elastic modulus is only glass fiber. 40 compared to when reinforced
% Improved. Further, the surface layer 10a reinforced with carbon fiber
When the thickness was 10 mm, it was improved by 150%, and a significant improvement in rigidity was obtained.

[0023]

In the track joint member of the present invention,
At least the surface layer of the seam member is reinforced with carbon fiber, so it has excellent conductivity, reduces the amount of bending due to bending load, is lightweight, has good workability, and is more durable. Became possible.

That is, by reinforcing the surface layer with carbon fibers, the elastic modulus is improved and the rigidity is greatly improved as compared with the conventional reinforcement using only glass fibers or the like, and as a result, especially the fatigue characteristics are significantly improved. In addition, the durability was about twice as high as that of the conventional one.
Therefore, it is preferably used as a track joint member.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a track joint member of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a front view showing a usage example of the track joint member of the present invention.

FIG. 4 is a sectional view taken along line BB of FIG. 3;

[Explanation of symbols]

 1, 2 Rails 3 Bolts 3a Nuts 3b Washers 4 Through holes 10 Orbital joint members 10a Surface layer 10b Center part 11 Abutment surface 12 Recesses 13 Bolt holes L Length H Height T Thickness

Claims (1)

[Claims] 1. A track seam member made of a thermosetting resin reinforced by fibers, which is provided on both sides of a seam of a rail of a railroad track or the like, and at least a surface of the seam member. A track seam member characterized in that all the fibers of the layers are carbon fibers.