JPH09256303A - Joint plate for rail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide abrasion-resistance and insulation, by arranging rail-joint plates made of a thermosetting resin reinforced by fiber between the side faced of the end of a rail and sticking an abrasion-resistance plate to the contact face of the rail. SOLUTION: Upper and lower side abrasion-resistant plates 5, 6 are stuck to the upper and lower inclined faces 3, 4 of both side faces 2 at the joint position between rail 10. Pierced holes 7a, 7b are formed along the breadthwise direction of the opposite faces 2 of the joint plates 1. The joint plates 1 are fixed by bolts 16 out through the insertion hole 15 of the rail 10 body 12 with nuts 12. The abrasion-resistant plates 5, 6 are made of steel, stainless steel, or a synthetic resin. The joint plates 1 are formed of a thermosetting resin reinforced by an electric non-conductive fiber to reduce the weight thereof and prevent decrease of the strength and increase the durability.

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 over the side surfaces of end portions of adjacent rails. More specifically, the present invention aims to reduce the weight and prevent the strength from decreasing. The present invention relates to a rail joint plate for preventing shortening of service life.

[0002]

2. Description of the Related Art Conventionally, at a connecting portion of railroad rails, a member called a joint plate is disposed so as to extend between side surfaces of end portions of adjacent rails.

This joint plate is connected to the ends of adjacent rails by tightening tools such as bolts. In other words, the adjacent rails are connected by this joint plate.

By the way, it is necessary to form an electric circuit in a rail provided at a location where a traffic signal or a railroad crossing alarm is installed in a certain section including the traffic light or the railroad crossing alarm.
Therefore, the joint plate that connects the rails in this fixed section is
It must have insulating properties. As described above, the joint plate that connects the rails of a certain section that forms the electric circuit is generally called an insulating joint plate to distinguish it from the joint plate that connects the rails of other sections that do not require insulation. .

On the other hand, since a steel joint plate which is an electric conductor cannot be used as it is as an insulating joint plate, conventionally, as shown in FIG. 7, the rail 51 and the joint plate 5 are used.
The insulating plate 53 and the insulating tube 54 are interposed between the two to ensure the insulating property.

However, such a joint plate 52 made of steel is heavy and has a poor workability when mounted on the rail 51. Further, when the ordinary joint plate 52 is used as the insulating joint plate, it is necessary to interpose the insulating plate 53 and the insulating tube 54 as described above, so that the number of man-hours on site increases, and in this respect also, the rail 51. It had a poor workability when attached to.

In order to eliminate such poor workability, therefore, there is provided a seam plate in which the whole seam plate is formed of a fiber reinforced thermosetting resin (for example, Japanese Patent Laid-Open No. 50-50).
47301, JP-A-7-145601).

According to this resin seam plate, it is lightweight and has good workability, and the insulation can be secured without interposing an insulating member such as the insulating plate 53 or the insulating tube 54.

[0009]

However, when such a joint plate made of fiber reinforced thermosetting resin is attached between the ends of the adjacent rails and the same load as when passing the train is applied, the rails And the relative displacement between the seam plate and
Slip will occur at the contact portion between the rail and the joint plate.

By the way, since the joint plate is fastened to the rail fairly firmly by a fastener such as a bolt,
A large contact pressure is applied to the contact surface between the rail and the joint plate.

Therefore, when the contact portion slides in this state, the contact surface of the joint plate is worn by the rail, and this wear rapidly progresses due to repeated loading. Then, there was a problem that the contact surface of the joint plate was eventually damaged, the strength was lowered, and the service life was shortened.

The present invention was devised to solve such a problem, and an object thereof is to make the contact surface of the seam plate against the rail have sufficient strength against friction and to be lightweight and to be applied to the rail. An object is to provide a rail joint plate having good mounting workability.

[0013]

In order to solve the above-mentioned problems, the rail joint plate according to claim 1 of the present invention is a rail joint plate which is disposed so as to extend between end side surfaces of adjacent rails. It is formed of a thermosetting resin reinforced with fibers, and an abrasion resistant plate is attached to the contact portion with the rail.

That is, since it is formed of a thermosetting resin reinforced with fibers, it is made lighter by about 1/3 to 1/5 as compared with the case of steel. Further, since it is made of resin, an insulating member is not required and workability is good. Furthermore, since a wear resistant plate is attached to the contact part with the rail, even if the rail and the joint plate are displaced relative to each other, the joint plate itself will not be worn and the strength will be increased due to the wear. It does not decrease or shorten the service life.

A rail joint plate according to a second aspect of the present invention is a rail joint plate disposed across the end side surfaces of adjacent rails at a constant interval, It is made of thermosetting resin reinforced with conductive fibers, and metal wear-resistant plates are attached to the rails at the positions corresponding to the contacting parts at regular intervals. is there.

That is, since the abrasion resistant plate is made of metal, it has excellent abrasion resistance. Further, since the metal abrasion-resistant plates are attached at positions corresponding to the contact portions of the rails (that is, divided) at positions corresponding to the contact portions, the insulating property is also maintained.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a rail joint plate of the present invention (hereinafter referred to as
2 and 3 are a front view and a vertical sectional view showing a state in which the seam plate is attached to the rail.

The joint plate 1 of the present invention is formed in a horizontally long flat plate shape, and a surface 2 facing a rail 10 described later is
Although slightly curved, it is formed on a substantially flat surface.
Then, an upper abrasion-resistant plate (shown by hatching in FIG. 1) 5 is attached to the upper inclined surface 3 formed at the upper edge portion of the facing surface 2, and the lower side formed at the lower edge portion. A lower wear-resistant plate (shown by hatching in FIG. 1) 6 is attached to the inclined surface 4.

Further, the opposing surface 2 is formed with four through holes 7a, 7a, 7b, 7b along the width direction thereof, two through holes 7a, 7a on the left side and two through holes on the right side. The individual through holes 7b and 7b are paired with each other. In addition, the surface (outer surface) 8 opposite to the facing surface 2 is formed in an uneven shape, and the recessed portion 8a has a bolt 16 or a nut 1 described later.
It is a fitting groove of 7.

The joint plates 1 thus formed are adjacent to each other with a constant gap p that allows thermal expansion and contraction.
It is attached in a state as shown in FIGS. 2 and 3 straddling the side surfaces of the end portions of 0 and 10.

That is, as shown in FIGS. 2 and 3, the rail 10 has a bottom portion 11 which is a portion attached to a sleeper (not shown), a head portion 13 which is a portion with which a wheel of a train (not shown) comes into contact, a bottom portion 11 and The abdomen 12 is formed to be narrower than the head 13. Then, in the seam plate 1, the upper inclined surface 3 to which the upper abrasion-resistant plate 5 is adhered is abutted along the lower surface of the head portion 13 of the rail 10, and the lower abrasion-resistant plate 6 is adhered. The attached lower inclined surface 4 is abutted along the upper surface of the bottom portion 11 of the rail 10, and the facing surface 2 is arranged so as to have a slight gap with respect to the belly portion 12 of the rail 10. .

That is, the seam plate 1 is constructed so as to come into contact with the rail 10 only through the upper wear resistant plate 5 and the lower wear resistant plate 6.

Reference numeral 15 in the drawing denotes a bolt insertion hole formed in the belly portion 12 of the rail 10, and reference numeral 16 denotes a through hole 7a (7b) of the joint plate 1 and a bolt insertion hole 15 of the rail 10.
The reference numeral 17 is a nut, and the reference numeral 18 is a washer.

A recess 8 is formed in the center of the outer surface 8 of the seam plate 1.
The provision of a is made thinner than other portions because when the seam plate 1 is tightened to the rail 10 with the bolt 16, the bolt 16
This is because the head of the bolt 16 is inserted into the recess 8a to prevent the bolt 16 from rotating.

In the above structure, as the thermosetting resin used as the material for the joint plate 1, unsaturated polyester resin, epoxy resin, vinyl ester resin, phenol resin or the like is preferably used.

As the reinforcing fiber used as the material of the joint plate 1, glass fiber, carbon fiber, aramid fiber, vinylon fiber, etc. are preferably used, but these may be used in combination. As the form of the fiber, roving, chopped strand mat, continuous mat, roving cloth, interlaced cloth, cloth, etc. are preferably used, and these can be used alone or in combination.

As the material of the abrasion resistant plates 5 and 6, when made of metal, steel, stainless steel, aluminum, copper, other alloys, etc. are preferably used. However, steel and stainless steel are particularly suitable because they require some degree of abrasion resistance. When it is made of resin, polyethylene, Teflon, nylon, polypropylene, polystyrene and the like are preferably used. Further, a fiber-reinforced one of these synthetic resins may be used.

Further, in the above embodiment, the upper abrasion-resistant plate 5
Also, the lower wear-resistant plate 6 is provided over the entire length of the joint plate 1, but a sufficient effect can be expected even if it is provided only at the central portion of the joint plate 1 having a large relative displacement. In practice, it is preferable to provide the joint plate 1 with a length of 10% to 100%.

Further, the upper wear resistant plate 5 and the lower wear resistant plate 6
The width of the contact surface, which is in contact with the rail 10, is 5
It is preferably about 0% to 100%. If it is less than 50%, the effect as a wear resistant plate is not sufficiently exerted, and
This is because if it is more than 00%, the portion protruding from the contact surface is wasted.

Further, the upper wear resistant plate 5 and the lower wear resistant plate 6
Thickness is important, and if it is too thin, it may be damaged early due to wear, and if it is too thick, the cross-sectional shape of the joint plate 1 will change when it is attached to the joint plate 1, and the rail 10 It is difficult to attach. actually,
About 0.1 mm to 2 mm is preferable, and more preferably 0.2 m
m to about 1 mm.

The upper abrasion-resistant plate 5 and the lower abrasion-resistant plate 6 may be adhered by any suitable method such as bonding with an adhesive agent, or thermocompression bonding when the abrasion-resistant plate is a thermoplastic synthetic resin. To be selected.

FIG. 4 shows another embodiment of the seam plate 1, in which non-conductive fibers are used as reinforcing fibers, and the upper wear-resistant plates 5a, 5b and the lower wear-resistant plate 6a made of metal are used. , 6b
Is used.

When the joint plate 1 having such a structure is used as an insulating joint plate, since the upper wear-resistant plates 5a, 5b and the lower wear-resistant plates 6a, 6b are made of a conductive material, they are adjacent to each other. Insulation cannot be secured when the rails 10 and 10 are provided so as to straddle each other. Therefore, in this embodiment,
The upper wear-resistant plates 5a and 5b and the lower wear-resistant plate 6 are provided at positions corresponding to the contact portions of the adjacent rails 10 and 10, respectively.
A and 6b are attached.

That is, the upper wear-resistant plates 5a, 5b and the lower wear-resistant plates 6a, 6b are each divided into two parts with a certain interval to ensure the insulation.

In each of the above embodiments, the upper abrasion resistant plate 5 and the lower abrasion resistant plate 6 are attached to both the upper inclined surface 3 and the lower inclined surface 4 of the seam plate 1, respectively. Alternatively, the abrasion resistant plate may be attached only to the inclined surface where the abrasion is severe.

[0037]

EXAMPLE Next, an example of the joint plate 1 having the above structure will be described.

The seam plate 1 of this embodiment has a length L = 560 m.
m, height H = 105 mm, thickness T≈55 mm, and molded into almost the same shape as the currently used steel 50 kg N-type rail joint plate.

As the molding method, the following reinforcing fibers are dipped in a liquid thermosetting resin mixed with a curing agent, and the reinforcing fibers are introduced into a mold having an inner surface shape adapted to the cross-sectional shape of the joint plate. While heating, it is pulled out in the longitudinal direction of the mold to harden it, and then cut into regular lengths.

The details of the raw materials used at this time are as follows.

Reinforcing fibers: glass roving (# 4450 manufactured by Asahi Fiber Co., Ltd.), continuous strand mat (# 450 manufactured by Asahi Fiber Co., Ltd.), glass cloth (# 580 manufactured by Nippon Sheet Glass Co., Ltd.). Thermosetting resin: Vinyl ester resin. Hardener: Organic peroxide (t-butyl peroxybenzoate).

While the reinforcing fibers were arranged so as to be laminated at appropriate positions as a molded article, the thermosetting resin was supplied to heat and cure while drawing out the mold.

The content of reinforcing fibers in the obtained joint plate was 68.
The percentage of long fibers (rovings) in the total weight of reinforcing fibers is about 73% by weight.

Next, wear-resistant plates having the materials and shapes shown in the table of FIG. 5 were attached to the seam plate formed by the above method at the contact portion with the rail by the attachment method shown in the table.

The sample thus produced was mounted between the end side surfaces of the adjacent rails 10, 10 using bolts 16, nuts 17 and washers 18 as shown in FIG.
Then, the central portion (adjacent rails 10, 10 shown in FIG.
The repeated unilateral bending load of 5 tons was applied to the (gap p part of the above) with a bending span of 1.3 m and a limit of 2 × 10 ⁶ times. After that, the sample was removed and the degree of damage to the sample (joint plate) was visually observed. The results are shown in the table of FIG.

From the table shown in FIG. 6, it can be understood that the degree of damage after fatigue is considerably less when the wear resistant plate is used and when the wear resistant plate is used. Especially,
It can be seen that the one using stainless steel for the abrasion resistant plate is less in the damage of the joint plate itself and the abrasion resistant plate, and is excellent in preventing the deterioration of strength.

[0047]

The rail joint plate according to the first aspect of the present invention is made of a thermosetting resin reinforced with fibers, and has an abrasion resistant plate attached to the contact portion with the rail. , 1/3 to 1/5 compared to steel
It is possible to reduce the weight to a certain degree, and since it is made of resin, it does not require an insulating member and is excellent in workability. In addition, since a wear resistant plate is attached to the contact part with the rail, even if relative displacement between the rail and the seam plate occurs, the seam plate itself will not be worn, and the strength will be increased due to the wear. It does not decrease or shorten the service life.

The rail joint plate according to claim 2 of the present invention is formed of a thermosetting resin reinforced by non-conductive fibers, and has a certain interval at a position corresponding to a contact portion of each rail. Since the abrasion resistant plates made of metal are adhered to each other, the abrasion resistant plates are made of metal, and therefore have excellent abrasion resistance. In addition, since the wear resistant plates made of metal are respectively attached to the rails at the positions corresponding to the contact portions of the rails, the insulating property is maintained.

[Brief description of drawings]

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

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

FIG. 3 is a vertical cross-sectional view showing a state where a joint plate is attached to a rail.

FIG. 4 is a perspective view showing another embodiment of the rail joint plate of the present invention.

FIG. 5 is a chart showing details of materials, shapes, etc. of Examples and Comparative Examples.

FIG. 6 is a chart showing the results of Examples and Comparative Examples.

FIG. 7 is a vertical cross-sectional view showing a state where a conventional joint plate is attached to a rail.

[Explanation of symbols]

 1 seam plate 3 upper inclined surface 4 lower inclined surface 5 upper abrasion resistant plate 6 lower abrasion resistant plate 10 rail

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Noriji Abe 2-8, Hikarimachi, Kokubunji, Tokyo 38 Inside the Railway Technical Research Institute (72) Inventor Takaharu Nagato 2-8, Hikarimachi, Kokubunji, Tokyo Address 38 Inside the Railway Technical Research Institute

Claims (2)

[Claims] 1. A rail joint plate disposed across the end side surfaces of adjacent rails, wherein the rail joint plate is formed of a thermosetting resin reinforced with fibers, and A rail joint plate, wherein a wear-resistant plate is attached to a contact portion with the rail. 2. A rail joint plate disposed at a constant interval so as to straddle between end side surfaces of adjacent rails, and the rail joint plate is reinforced by a non-conductive fiber. A seam for rails, which is formed of a thermosetting resin and has metal abrasion-resistant plates attached to the rails at positions corresponding to the contact portions of the rails at regular intervals. Board.