JP3325535B2 - Seam plate for rail - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rail joint plate disposed between end side surfaces of adjacent rails.

[0002]

2. Description of the Related Art Conventionally, a member called a rail joint plate is provided at a connection point of a rail for a railway so as to extend between end side surfaces of adjacent rails. This rail joint plate is made of a long member, and as shown in FIG. 5, a pair of rail joint plates A, A are simultaneously sandwiched between end side surfaces of adjacent rails B, and bolts C and nuts D are provided. The pair of rail joint plates A, A are integrally fixed to each rail B by a fastening tool such as. Adjacent rails B are connected by integrally fixing a pair of rail joint plates A, A to each rail B.

[0003] By the way, it is necessary to form an electric circuit in a certain section including a traffic signal and a level crossing alarm on a rail provided at a place where a signal and a level crossing alarm are installed.

[0004] Therefore, a rail joint plate for connecting rails having an electric circuit is required to have insulating properties. As described above, the rail joint plate for connecting the rail including the electric circuit is distinguished from other ordinary rail joint plates that do not require insulation, and is generally called an insulating joint plate.

[0005] On the other hand, a steel seam plate, which is an electric conductor, has no insulating property, and cannot be used as it is as an insulating seam plate. Therefore, conventionally,
As shown in FIG. 5, rail B and rail joint plates A, A
An insulating member E such as an insulating plate or an insulating tube is interposed between the insulating member and the insulating member E to secure insulation.

[0006] However, such a rail joint plate A made of steel is heavy, and when used as an insulating joint plate, an insulating member E such as an insulating plate or an insulating tube must be interposed. At the time of construction,
The number of man-hours on site increased, and the workability at the time of attaching to the rail B was poor.

Also, there is a limit to the thickness of the insulating member E,
If the insulating member is lost due to wear, there is also an insulation trouble that the rails on both sides conduct.

Therefore, in order to eliminate such poor workability, the entire rail joint plate is formed of a thermosetting resin, so that it is lightweight, has good workability, and is insulated without requiring an insulating member. There has been proposed a joint plate for rails which can ensure the performance (see Japanese Patent Application Laid-Open Nos. 50-47302 and 7-145001).

[0009] In order to increase the strength, the rail joint plate formed of the thermosetting resin usually contains a reinforcing fiber material such as glass fiber in the resin.

[0010]

Incidentally, since the rail joint plate is integrally fixed to the rail, a bending load is applied to the rail joint plate as the rail bends when passing through the train. At the lower part of the plate, a tensile stress occurs in the longitudinal direction of the rail, and at the upper part, a compressive stress also occurs in the longitudinal direction. Also, when the rail thermally expands and contracts,
Longitudinal tension or compression also occurs in the rail seam plate.

Further, when the rail joint plate is attached to the rail, the rail joint plate is tightened and fixed with a considerable torque by a bolt or the like. Therefore, the rail joint plate is provided in the axial direction of the bolt, ie, for the rail. Compressive stress is generated in a direction perpendicular to the longitudinal direction of the seam plate.

Therefore, the rail joint plate must have rigidity and strength that can withstand the stress generated in both the longitudinal direction and the bolt tightening direction.

However, the rail joint plate made of a thermosetting resin reinforced with a reinforcing fiber material mainly takes the fiber length direction of the fiber material into consideration in consideration of the bending due to the bending of the rail. In the longitudinal direction. As a result, the strength can be increased with respect to a load such as tension and compression in the orientation direction of the fiber, but the strength of tension and compression in a direction perpendicular to this direction cannot be increased so much.

Therefore, conventionally, the strength of the rail joint plate against tensile and compressive loads in the longitudinal direction could be increased, but in the direction perpendicular to the longitudinal direction and in the tightening direction of bolts or the like. Sufficient strength was not obtained for the fastening load.

The present invention has been made in view of such a problem, and has been made to reduce the strength of the rail joint plate not only in the longitudinal direction but also in the direction orthogonal to the longitudinal direction and the tensile load in the bolt tightening direction. It is another object of the present invention to provide a rail joint plate having sufficient strength to withstand a compressive load.

[0016]

In order to achieve the above object, the invention according to claim 1 is made of a thermosetting resin reinforced with a fiber material, and straddles between the end side surfaces of adjacent rails. The weight content of the fiber material is 65 to 65% of the total weight of the rail seam plate.
At 75%, 60 to 70% of the total weight of the fiber material is constituted by the linear material for the longitudinal direction which is disposed so as to be oriented in the longitudinal direction of the rail joint plate, and 2% of the total weight of the fiber material.
2.5 to 34% is made of a sheet-shaped material having isotropic properties and arranged at least along the outer shape in the longitudinal direction of the rail joint plate.

The term "isotropic sheet-like material" as used herein means that the physical properties of the sheet-like material on the plane are uniform in all directions. It means that a substantially constant value is obtained on the left and right.

The longitudinal direction of the rail joint plate is as follows.
This means the same direction as the length direction of the rail when the rail joint plate is fixed to the rail.

According to a second aspect of the present invention, in the first aspect, 6 to 7.5% of the total weight of the fiber material is
The rail joint plate is made of a linear material for the height direction which is arranged so as to be oriented in the height direction when the rail joint plate is installed.

According to a third aspect of the present invention, in the first or second aspect, the fiber material is glass fiber.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the thermosetting resin is an epoxy acrylate resin containing bisphenol A as a main material.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the thermosetting resin has a compression strength after curing of 265 MPa or more.

The invention according to claim 6 is the invention according to claims 1 to
7. The thermosetting resin according to claim 5, wherein
Has a notched Izod impact value of 60 kJ after curing.
/ M ^TwoThese are the above.

According to a seventh aspect of the present invention, the thermosetting resin according to any one of the first to sixth aspects has a tensile elongation after curing of 6% or more.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, the rail joint plate 1 of the present invention has a horizontally long plate shape formed of a thermosetting resin containing a fiber material.

As shown in FIGS. 2 and 3, the rail joint plate 1 uses two rail joint plates 1, 1 to connect adjacent rails 2, 2. As shown in FIG. That is,
The rails 2, 2 are sandwiched between the two rail joint plates 1, 1, the bolts 3 are penetrated, and the bolts 3 and the nuts 4 are tightened and fixed.

First, as shown in FIG. 3, the rail 2 has a base 21 which is a portion attached to a sleeper (not shown).
And a head 22 which is a portion where the train wheels contact, and a column 23 connecting the head 22 and the base 21. The column 23 is formed narrower than the base 21 and the head 22. Have been. Further, two bolt insertion holes 24 are formed at both ends in the longitudinal direction of the pillar portion 23 of the rail 2.

As shown in FIGS. 1 to 3, the rail joint plate 1 has a long plate shape, and is opposed to the side surface of the rail 2. The rail joint plate 1 has a back surface portion 11 facing the side surface of the rail 2 and an exposed surface portion 13 having a groove portion 12 extending in a longitudinal direction (a direction in FIG. 1). In the groove 12, four through holes 14, 14, 14, 14 are formed along the groove 12 so as to penetrate in the thickness direction (the direction b in FIG. 1) of the rail joint plate 1. The bolt 3 is penetrated through the holes 14, 14, 14, 14.

Also, on the back part 11, the head 2 of the rail 2 is provided.
2 and an upper inclined surface 15 contacted along the lower surface;
And a lower inclined surface 16 which is in contact with the upper surface of the base 21 of the base member 21.

When the rail joint plate 1 is disposed on the side surface of the rail 2, the upper inclined surface 15 of the rear portion 11 is brought into contact with the lower surface of the head 22 of the rail 2, and The lower inclined surface 16 is brought into contact with the upper surface of the base 21 of the rail 2, and the center of the rear portion 11 is disposed so as to be slightly spaced from the column 23 of the rail 2.

That is, the rail joint plate 1 is configured to contact the rail 2 only through the upper inclined surface 15 and the lower inclined surface 16.

The rail joint plate 1 thus formed
When connecting the adjacent rails 2 and 2 by using the above, first, the two rail seam plates 1 are separated from each other by a certain gap P so that thermal expansion and contraction can be performed.
2 between both side surfaces of the end. At this time, the through holes 14 of the two rail joint plates 1 and 1 are aligned with the bolt insertion holes 24 provided at the end of the rail 2. Then, the bolt 3 is inserted into the bolt insertion hole 24 and the through hole 14.
And tighten the bolts 3 and nuts 4 to
The rail joint plates 1 and 1 are fixed to the rails 2 and 2.

Next, the material for forming the rail joint plate 1 of the present invention and the material thereof will be described.

The rail joint plate 1 of the present invention is formed of a thermosetting resin reinforced with a fiber material. As the thermosetting resin, an epoxy acrylate resin mainly composed of bisphenol A is used. Most preferred, and
Most preferably, glass fiber is used as the fiber material.

As the thermosetting resin, it is most preferable to use an epoxy acrylate resin containing bisphenol A as a main raw material, but other thermosetting resins such as epoxy resin, unsaturated polyester resin, vinyl ester resin and phenol resin. A curable resin may be used.

As the material of the fiber material, glass fiber is most preferable, but not only glass fiber but also reinforced fiber having insulating properties and relatively high strength such as carbon fiber and aramid fiber is used. You may.

As the fiber material used in the present invention, one made of a sheet material and one made of a linear material are used.

In the present embodiment, the sheet material 17 is
As shown in FIGS. 3 and 4, a plurality of sheets are arranged in a stacked state in the rail joint plate 1, and at least the outermost sheet-like material 17 is disposed in the longitudinal direction in the rail joint plate 1. It is arranged so as to follow the outer surface shape in the direction.

The arrangement along the outer shape in the longitudinal direction refers to the arrangement along the outer shape of the back surface portion 11 and the exposed surface portion 13.

As shown in FIG. 4, a plurality of sheet materials 17 may be laminated, or a single material may be laminated by winding multiple layers.

As the sheet material 17, nonwoven fabric such as continuous strand mat or chopped strand mat or woven fabric such as roving cloth having isotropic properties is used. It is most preferable to use a nonwoven fabric of The sheet material 17 may be used alone or in combination of a plurality of types.

Here, the roving cloth refers to a roving formed by elongating a strand in which filaments are bundled into a string form, for example, by plain weaving.

In the continuous strand mat, a continuous strand is spirally wound on a plane,
Adjacent strands are bonded to each other by a thermosetting resin such as unsaturated polyester to form a mat.

The chopped strand mat is 4-5c
The strands cut into a length of m are dispersed in a random direction and laminated to a uniform thickness, and the strands are bonded to each other with a thermoplastic resin such as an acrylic resin or starch paste to form a mat.

As the linear materials 18 and 19, long fibers such as rovings are used as partially shown in FIG.

For the roving, a blind roving can be used to align a plurality of rovings in parallel in the same direction. The blind roving is a roving in which the rovings are cut to a predetermined length and arranged side by side in one direction, and the rovings are joined in a horizontal direction with a yarn to form a seemingly sheet shape.

In the present invention, when the above fiber material is contained in the rail joint plate 1 formed of a thermosetting resin, the weight content of the entire fiber material is 65 to 75 times the total weight of the rail joint plate 1. %, First, 22.5 to 34% of the total weight of the fiber material is converted to an isotropic sheet material 17.
As shown in FIG. 4, the sheet material 17 is disposed such that at least the outermost layer conforms to the shape of the outer surface in the longitudinal direction of the rail joint plate 1 as described above.

Further, 60-70% of the total weight of the fiber material
Is composed of a linear material, and 6% of the total weight of the fiber material.
The linear material corresponding to 0 to 70% is arranged so that the length direction of the linear material is oriented in the longitudinal direction of the rail joint plate 1 as partially shown in FIG.

The total weight of the remaining fiber material is 6 to
As shown in FIG. 4, 7.5% of the linear material is composed of a linear material, and 6 to 7.5% of the total weight of the fiber material is
The linear material is arranged such that the length direction thereof is oriented in the height direction when the rail joint plate 1 is installed.
The linear material used at this time is preferably Sudare roving in order to maintain the fiber direction during molding.

Here, if the bending strength in the longitudinal direction of the rail joint plate 1 is not less than 450 MPa and the bending elastic modulus is not more than 18 GPa, the bending strain becomes large with respect to the load (16 ton) when passing through the train, and the repeated load is applied. May be destroyed.

Therefore, in order to increase the bending strength to 450 MPa or more, the weight content of the entire fiber material in the rail joint plate 1 is set to 65% or more of the total weight of the rail joint plate 1.
Among them, it is necessary that 60% or more of the total weight of the fiber material is composed of a linear material, and the linear material needs to be oriented in the longitudinal direction of the rail joint plate 1.

However, when the weight content of the fiber material is more than 75%, the amount of the thermosetting resin binding the fiber material is reduced, and it is difficult to obtain the required rigidity and strength.

The rail joint plate 1 has a compressive strength of about 160 MPa or more in a direction orthogonal to the longitudinal direction.
If the shear strength is not set to 145 MPa or more, the tightening torque (5 ton / cm) and the bolt tension (160K) by the bolts 3 and the nuts 4 tightened from the same direction.
N), it may not be able to withstand and may be destroyed.

Therefore, even if the total content of the fiber material is 65% by weight or more, in order to sufficiently withstand the tightening torque and the tension of the bolt, a line oriented in the longitudinal direction of the rail joint plate 1 is required. The shape material is 60-70% of the total weight of the fiber material, and 2% of the total weight of the fiber material.
2.5 to 34% is constituted by the sheet-like material 17 having isotropic properties, and the sheet-like material 17 has at least the outermost layer along the outer shape of the rail joint plate 1 in the longitudinal direction as described above. In addition, it is necessary to arrange the linear material of 6 to 7.5% of the total weight of the fiber material so as to be oriented in the height direction when the rail joint plate 1 is installed.

Further, in order to increase the compressive strength in the direction perpendicular to the longitudinal direction (bolt tightening direction) of the rail joint plate 1, the compressive strength after curing of the thermosetting resin is 2.
It is preferably at least 65 MPa, and
It is further preferable that the thermosetting resin has a notched Izod impact value of not less than 60 kJ / m ² after curing. Further, it is most preferable that the thermosetting resin has a tensile elongation of 6% or more after curing.

As described above, as the thermosetting resin, a thermosetting resin having a compression strength after curing of 265 MPa or more, an Izod impact value without notch of 60 kJ / m ² or more, and a tensile elongation of 6% or more is used. By using
Not only can the longitudinal compressive strength, shear strength, tensile strength and bending strength of the rail joint plate 1 be increased, but also the compressive strength and shear strength in the bolt tightening direction can be increased.

As a method for manufacturing the rail joint plate 1 having the above structure, a conventionally known synthetic resin molding method such as a drawing molding method, a press molding method, or an injection molding method can be employed. The pultrusion molding method is most preferred in view of the properties, lamination properties, realization of a high fiber content, and the like.

In the pultrusion molding method, a linear material impregnated with a thermosetting resin is arranged in a state where the linear material impregnated with a thermosetting resin is arranged between sheet-shaped materials impregnated with a thermosetting resin. While being continuously transferred into a mold having an inner surface shape adapted to the cross-sectional shape, the material is heated and cured, pulled out, cut into a predetermined size, and finally the bolt insertion hole 24 is opened.

According to the rail joint plate 1 of the present invention, since it is formed of a thermosetting resin reinforced by glass fiber, it is about one third to one third as compared with the case of steel.
The weight can be reduced to about 5, and since it is made of resin, an insulating member is not required, and workability is excellent.

Although the rail joint plate 1 of the present invention is suitably used as an insulating joint plate, it can of course be used as an ordinary rail joint plate.

[0062]

Next, a specific embodiment of the rail joint plate 1 having the above-described structure will be described.

The rail joint plates according to the first embodiment, the second embodiment, and the comparative example have a length L = 560 mm, a height H = 105 mm, and a thickness T ≒ 55 mm, and are currently used. It is formed to have almost the same shape as a steel 50 kg N-type rail joint plate.

As the thermosetting resin, bisphenol A
Is used as the main raw material.

As the fiber material, a continuous strand mat made of glass fiber (# 450 manufactured by Asahi Fiber Co., Ltd.) was used as a sheet material, and a linear material for the length direction was used as a fiber material.
A glass roving (# 4450, manufactured by Asahi Fiber Co., Ltd.) made of glass fiber, and a blind roving (# 350, manufactured by Uji Substrate Co., Ltd.) are used as the linear material for the height direction.

The molding method is the same as that between a sheet material (continuous strand mat made of glass fiber) impregnated with an epoxy acrylate resin containing bisphenol A as a thermosetting resin as a main material.
Material (glass roving and blind roving) impregnated with epoxy acrylate resin whose main raw material is
Are arranged in a state where they are aligned, then introduced into a mold having an inner surface shape adapted to the cross-sectional shape of the rail joint plate 1, while being continuously transferred in the longitudinal direction of the rail joint plate 1. After heat-curing, pulling out, and cutting to a predetermined size, finally, a through hole 14 for inserting the bolt 3 into a predetermined position is opened.

According to the above-mentioned materials and molding methods, the total content of the fiber material in the rail joint plate shown in Table 1 below,
Examples and comparative examples in which a rail joint plate is formed by changing the ratio of the orientation direction of each fiber material and the physical property value of the thermosetting resin will be described.

[0068]

[Table 1] In Table 1, (A) shows the ratio (%) of the linear material oriented in the longitudinal direction of the rail joint plate in the total fiber material.

In Table 1, (B) shows the ratio (%) of the sheet material to the total fiber material.

Further, in Table 1, (C) shows the ratio (%) of the linear raw material oriented in the height direction when the rail joint plate is installed in the total fiber material.

With respect to the sample prepared in this manner, the direction in which the bolts are fastened to the rail joint plate 1 is the lateral direction of the rail joint plate 1 (direction b in FIG. 1) and the longitudinal direction of the rail joint plate 1 (direction b). When the physical properties in the direction a in FIG. 1) were measured, the results shown in Table 2 below were obtained.

[0072]

[Table 2] As shown in Table 2, in the basic physical properties, in Examples 1 and 2, the compressive strength in the horizontal direction and the shear strength for withstanding the tightening load of the bolt were significantly improved as compared with the comparative example.

Further, by positively orienting the linear material in the height direction at the time of installing the rail joint plate,
The longitudinal strength of the rail joint plate has also been improved.

Further, as can be seen from a comparison between Example 1 and Example 2, more excellent physical properties can be obtained by increasing the strength of the thermosetting resin.

According to the configuration of the second embodiment, the rail joint plate 1 has a lateral compressive strength of 200 MPa or more, a shear strength of 150 MPa or more, and a longitudinal compressive strength of 4 MPa or more.
00 MPa or more, shear strength can be 50 MPa or more, tensile strength can be 500 MPa or more, and bending strength can be 600 MPa or more.

Then, the sample prepared in this way is
As shown in FIG. 3, with the bolts 3 and the nuts 4 attached between the end side surfaces of the adjacent rails 2 and 2,
A bending fracture test, a bending fatigue test, and a bolt fastening test by tightening a bolt 3 for attaching the rail joint plate 1 to the rail 2 were performed.

When the comparative example and the example 1 were compared, the bending strength and the elastic modulus of the molded article depended on the glass content.
In Example 1, it was improved to 150 kN. further,
In the comparative example, when the bolt fastening torque is 400 Nm and the bolt tension becomes 150 kN, the bolt yields,
Although cracks occurred on the back surface of the rail joint plate, in Example 1, the bolt fastening torque was 700N.
-Even if the tension of the bolt was 260 kN at m, the bolt could be fastened without breaking the rail joint plate.

Further, a bending fatigue test in which a predetermined bending force (35 kN) was repeatedly performed for a certain period of time so that the load condition was achieved on an actual track was performed. In Example 1, the number of times was about twice that in the comparative example. The result which can endure was given.

Further, comparing Example 1 and Example 2, the bending strength, which was 150 kN in Example 1, was
In Example 2, it was improved to 170 kN, and a bending fatigue test was performed. As a result, the fatigue performance was more than doubled under a load condition on an actual track. In addition, when the results of the bending fatigue test of Example 2 and the comparative example were compared, it was found that the result of Example 2 was about 10 times as large as that of the comparative example.

Further, in Example 1, when the bolt fastening torque was 800 N · m and the bolt tension became 300 kN, yielding occurred and cracks occurred on the back surface of the rail joint plate. In the second embodiment, the bolt fastening torque is 1400 N · m and the bolt tension is 500
Even at kN, the bolt could be fastened without breaking the rail joint plate.

As described above, according to the second embodiment, the compressive stress and the shear stress generated by fastening the bolt can be isotropically strengthened, and the bolt fastening strength can be improved.
Furthermore, it has excellent compressive strength and shear strength, excellent repetitive dynamic characteristics such as bending fatigue, and can be deformed by completely following glass with a theoretical elongation of 6% against deformation such as distortion and bending. Excellent dynamic characteristics. Moreover, it has excellent production performance.

As a result, in Example 1, the safety factor and the long-term fatigue performance with respect to the fastening force could be improved to a level that satisfies a practically sufficient safety factor.

As described above, according to the present invention, practical problems such as insufficient resistance to bolt fastening force, insufficient static bending strength, insufficient bending fatigue strength, and the like, which occur in conventional products, are solved. , Sufficient performance can be realized.

[0084]

As described above, according to the first aspect of the present invention, it is molded with a thermosetting resin reinforced with a fiber material,
In a rail joint plate disposed between end side surfaces of adjacent rails, the weight content of the fiber material is 65 to 75% of the total weight of the rail joint plate and 60 to 75 of the total weight of the fiber material. 70% is composed of the linear material for the longitudinal direction arranged so as to be oriented in the longitudinal direction of the rail joint plate, and 22.5 to 34% of the total weight of the fiber material is isotropic. And since it was constituted by the sheet-like material arranged along at least the outer surface shape in the longitudinal direction of the rail joint plate, the bending strength and elastic modulus in the longitudinal direction of the rail joint plate were improved. Meanwhile, by arranging the sheet-shaped material having the isotropic ratio in the above ratio, the rail joint plate is isotropically strengthened against the compressive stress and the shear stress generated by fastening the bolt,
Bolt resistance can be improved.

Further, according to the second aspect of the present invention, in the first aspect of the present invention, the total weight of the fiber material is from 6 to 6%.
7.5% is composed of a linear material for the height direction that is arranged so as to be oriented in the height direction when the rail joint plate is installed, so the part where tensile stress is generated by bolt fastening is strengthened. Therefore, it is possible to reinforce with respect to the tensile stress and further improve the bolt fastening resistance.

Further, according to the third aspect of the present invention, in the first or second aspect of the present invention, the fiber material is made of glass fiber, so that the fiber material as a fiber material for reinforcing the rail joint plate is excellent. Strength is obtained.

According to a fourth aspect of the present invention, in the first aspect, an epoxy acrylate resin containing bisphenol A as a main material is used as the thermosetting resin. As compared to unsaturated polyester resin, which has been mainly used in the past because it can be molded in a short time in terms of productivity, it has the same compressive strength, shear strength, and adhesion to glass fiber as epoxy resin. However, the time required for curing can be reduced to about 1/20 of the curing time by the epoxy resin while being equal to that of the unsaturated polyester resin.

As a result, it is possible to secure a production performance equivalent to that of the unsaturated polyester resin while obtaining strength comparable to that of the epoxy resin, and to provide a product having strength and cost competitive with iron products.

Further, according to the invention described in claim 5, in the invention described in any one of claims 1 to 4,
By using a thermosetting resin having a compressive strength of 265 MPa or more after curing, a rail joint plate excellent in compressive strength and shear strength after curing can be provided.

According to the invention of claim 6, in the invention of any of claims 1 to 5, the thermosetting resin has an Izod impact value of 60 kJ / m without notch after curing. By using ^two or more, it is possible to provide a rail joint plate having excellent repetitive dynamic characteristics such as bending fatigue.

Further, according to the invention described in claim 7, in the invention described in any one of claims 1 to 6,
By using a thermosetting resin having a tensile elongation of 6% or more after curing, it can be deformed by completely following glass having a theoretical elongation of 6% with respect to deformation such as distortion and bending. Accordingly, a rail joint plate excellent in dynamic characteristics can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view of a rail joint plate according to the present invention.

FIG. 2 is a front view showing a state where a rail joint plate is attached to a rail;

FIG. 3 is a longitudinal sectional view showing a state where a rail joint plate is attached to a rail.

FIG. 4 is an explanatory view showing an arrangement state of a fiber material in a rail joint plate immediately after drawing and forming;

FIG. 5 is a longitudinal sectional view showing a state where a conventional rail joint plate is attached to a rail.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seam board for rails 17 Sheet material 18 Linear material for longitudinal direction 19 Linear material for height direction 2 Rail

Claims (7)

(57) [Claims] 1. A rail joint plate formed of a thermosetting resin reinforced with a fiber material and disposed between end side surfaces of adjacent rails, wherein a weight content of the fiber material is changed to a rail joint. 65 to 75% of the total weight of the plate, and 60 to 70% of the total weight of the fiber material is constituted by the linear material for the longitudinal direction which is arranged to be oriented in the longitudinal direction of the rail joint plate. , 22.5-34% of the total weight of the fiber material
Are made of a sheet-like material having isotropic properties and arranged at least along the outer shape in the longitudinal direction of the rail joint plate. 2. A fiber material for the height direction which is arranged so as to be oriented in the height direction when the rail joint plate is installed, comprises 6 to 7.5% of the total weight of the fiber material. The rail joint plate according to claim 1, wherein: 3. The rail joint plate according to claim 1, wherein the fiber material is glass fiber. 4. The rail joint plate according to claim 1, wherein the thermosetting resin is an epoxy acrylate resin containing bisphenol A as a main material. 5. The thermosetting resin has a compression strength after curing of 26.
The rail joint plate according to any one of claims 1 to 4, which has a pressure of 5 MPa or more. 6. The rail joint plate according to claim 1, wherein the thermosetting resin has a notched Izod impact value of not less than 60 kJ / m ² after curing. 7. The rail joint plate according to claim 1, wherein the thermosetting resin has a tensile elongation after curing of 6% or more.