JP2559676B2 - Rail insulation joint plate - 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 insulating joint plate which is an integral unit of an insulating plate and a rail joint plate used for a rail rail insulating joint.

[0002]

2. Description of the Related Art Insulating joints of rails in railways are
It is an important part that insulates signals sent to rails that are inevitable for safe driving of trains, trains, and other electric signals for controlling vehicle operation.

Normally, the seam portion of the rail is spliced 2
The ends of the rails 1 are abutted against each other, and both sides of the rail 1 are sandwiched between the joint plates 2 and 2 and fixed by 4 to 6 fastening bolts 5 (see FIG. 2). The rail joint is also a place where the rail is easily damaged by repeated load due to wheel load when the vehicle passes. For this reason, the seam plate is made of steel with high mechanical strength.

On the other hand, in the case of the insulating joint, the thickness between the rail 1 and the steel joint plate 2 is about 3 m as shown in FIG.
Rail insulation seam plate 3 made of m thermoplastic resin
Via a rail fastening bolt 5 into which the insulating flanged tube 4 is fitted.

Further, there is also known an insulating seam plate 2 in which a laminated glass fiber cloth is impregnated with a thermosetting resin, and the steel seam plate 2 is heated and pressure-cured to be an insulator as a whole, and the insulating seam plate 3 is not used. Has been.

[0006] In the railroad, the rail joint differs depending on the type of vehicle, the construction, and the passing frequency, but not only the repeated load of 5000 to 60 million tons per year is applied to the section where the passing frequency is high, and the arrow shown in FIG. As described above, when the vehicle passes through, the rail joint may drop due to wheel load, that is, a step may be formed on the rail, and the difference may reach 4 to 5 mm.

The insulating plate 3 interposed between the steel seam plate 2 and the rail due to the rail seam drop is compressed every time the wheel load is applied, and is gradually rolled to 4-5 in a section where the vehicle frequently passes. There is a risk of damage in months and poor insulation, and the insulating plate must be replaced with a new one at the railway site. Such insulation plate replacement works frequently occur in frequently operated sections, and because it is assembly at the railway site, the emergence of economical, easy-to-use, and durable rail insulation joint plates is strong. Was wanted.

A rail insulation seam using a seam plate made of an insulating material made of glass fiber cloth and resin causes the insulation layer to be peeled off due to the step movement of the rail that occurs when a vehicle passes through, and the insulation seam plate is destroyed. May be damaged.

[0009] Assembly work of the rail insulation joint is mainly carried out in a limited short time after passing the last train and before passing the first train. The parts that make up the rail insulation seams have a surprisingly large number of parts such as steel seam plates, insulation plates, flanged tubes for bolt insulation, fastening bolts, nuts, washers, and rail-shaped insulation materials. Since it has to be assembled at the railway site, sometimes it is forgotten to install it, which may cause insulation failure.

As described above, the insulating joint portion of the rail is constructed by interposing the insulating plate 3 between the rail 1 and the steel joint plate 2 and inserting and assembling the fastening flange 5 with the insulating flanged tube 4. However, every time the iron wheel passes over the rail, iron powder is generated and falls due to friction, and when this adheres and accumulates on the shoulder portion 6 or the hem portion 8 of the steel joint plate 2, the adhered and accumulated iron powder contacts the rail. However, this may cause insulation failure and cause a signal failure.

[0011]

DISCLOSURE OF THE INVENTION The present invention solves these problems and is easy to handle when assembling an insulating seam, rationalizes the work and enhances the safety by strengthening the insulating plate. , Is intended to provide a highly safe rail insulation seam board that can withstand long-term use.

[0012]

According to the present invention, a glass fiber and an aramid fiber mixed woven cloth are laminated on one surface of an alternate laminate of vinylon cloth and aramid fiber cloth, and glass fiber cloth is laminated on both upper and lower surfaces of the laminate. A rail insulating joint plate is characterized in that a rail insulating plate integrally molded and hardened with an epoxy resin is fixed to a rail joint surface side of a steel joint plate.

The rail insulating joint plate of the present invention will be described with reference to the drawings. FIG. 1 shows an insulating joint portion of a rail, and an insulating plate 3 is firmly fixed 11 to a rail joint surface side of a steel joint plate 2. FIG. 5 shows a perspective view of the insulating plate 3. In the figure, reference numeral 9 is an upper surface portion, 10 is a lower surface portion, and 11 is a fixing portion to the steel joint plate 2. The insulating plate 3 is fixed and integrated with resin on the rail contact surface side of the steel joint plate 2.

As shown in the model diagram of FIG. 4, the insulating plate 3 is formed by alternately laminating several to ten or more vinylon cloths (V) and aramid fiber cloths (A) (V / A), and glass roving on one surface thereof. And aramid fiber woven cloth (A-
G) is laminated, and further a glass fiber cloth (G) is laminated on both upper and lower surfaces, which is integrally molded and cured with a resin. A liquid epoxy resin is preferably used as the resin used. The epoxy resin may be impregnated into each cloth in advance, or may be impregnated into the entire laminate or a partially laminated product.

In the insulating plate 3, between the rail 1 and the steel joint plate 2 are the upper surface portion 9 and the lower surface portion 10 that receive the load due to the wheel weight when the vehicle passes. Therefore, the upper surface portion 9 and the lower surface portion 10 are
This is where pressure resistance and wear resistance are most required. In the present invention, since the aramid fiber cloth having high toughness is used together with the vinylon cloth, the strength of the insulating plate is increased. In consideration of economy, the aramid fiber cloth may be laminated only on the portions corresponding to the upper surface portion 9 and the lower surface portion 10 of the insulating plate.

The rail insulation seam must insulate not only the insulation plate but also the fastening bolt. The insulation of the fastening bolt is
The insulating flanged tube 4 made of an insulating material is inserted into the head portion of the fastening bolt and the screw part (see FIG. 2) to insulate the insulating flanged tube. When integrally fixed to the above, the object of the present invention can be achieved more effectively. The insulating flanged tube is made by laminating glass fiber, aramid fiber, etc. woven fabrics, which are integrally pressed with resin and heat-cured, which is used for fastening bolts of the rail insulation joint plate of the present invention. Adhesively fix the holes with resin. It is preferable to use the rail-insulated flanged tube having the structure described in Japanese Utility Model Laid-Open No. 6-67501.

The rail rail causes friction between the wheels and the rail each time a vehicle passes, and the rail constantly wears to generate iron powder. For rail insulation seams, shoulders of steel seams,
If iron powder falls and accumulates on the hem, it may contact the rail and cause insulation failure. In order to prevent this, an insulating coating layer is applied to the shoulder portion 6 and the hem portion 8 of the steel joint plate as shown in FIG.

The insulating coating layer is obtained by impregnating a glass fiber cloth cut into a predetermined size with an epoxy resin and laminating it on the shoulder portion 6 and the hem portion 8 of the steel seam board in a number of 2 to 3 layers, and a thickness of 40 to 5
Completely cure and bond in an oven at 0 ° C. By doing so, it is possible to prevent insulation failure due to the adhesion and deposition of iron powder.

When the insulating plate 3 is obtained, the resin used for curing may be colored so that it can be used as a guide for replacing the rail insulating joint plate. For example, a yellow pigment is added to the cured resin in the first to 11th layers of the fiber cloth layer forming the insulating plate, and a red pigment is added to the cured resin in the 12th to 14th layers. The amount of pigment added may be 1 to 2% by weight.
By doing so, when the rail insulation joint plate is yellow when viewed from the rail contact surface, it can be used as it is, and when it becomes red, replacement can be prevented to prevent the occurrence of insulation failure.

[0020]

[Embodiment] The uppermost layer (first layer) and the lowermost layer (14th layer) have a basis weight of 209 g / m ² , a vertical width and a horizontal width of 67.5 TE.
X, number of driven 42 vertical / inch x horizontal 32 / inch,
Tensile strength vertical 45 kg / inch, horizontal weave 34 kg / inch glass fiber plain weave cloth, the second to twelfth layers have a basis weight of 175 g / m ² , thickness vertical and horizontal 1800 d, number of vertical driving and horizontal 11 Inch, tensile strength 230K
g / 3cm, 6% vinylon plain weave cloth with 8% elongation, and basis weight 270g / m ² , thickness vertical, horizontal 1500
aramid fiber cloth 5 with d, vertical driving number, width 33.5 / 5 cm, tensile strength 200 Kg / cm ² , elongation 5%
The sheets are alternately laminated to form the 2nd to 12th layers.

The thirteenth layer comprises a composite yarn of one aramid fiber yarn having a thickness of 2160d for the warp yarn and glass roving having a thickness of 577.5TEX, and the number of striking is 6.5 yarns / inch, and the weft yarn has a yarn length of 1140d. Two aramid fibers and 577.5 TE
Composed of composite yarn with X glass roving, 6 threads /
Inch, basis weight 412 g / m ² , tensile strength 400 to 50
0 kg / inch glass fiber and aramid fiber mixed woven cloth were laminated.

After the above-mentioned cloth laminate is uniformly and completely impregnated with a liquid epoxy resin containing a curing agent, the first layer side is a surface contacting the rail, and the 14th layer side is a steel seam plate fixing surface. 1 to 5 Kg / cm ² in mold, temperature 90 to
Molded at 95 ° C., an insulating plate having the shape shown in FIG. 5 was manufactured.

The surface 11 of the obtained insulating plate 3 in contact with the steel seam plate is ground with 80 to 100 # sandpaper, while the surface of the steel seam plate 2 in contact with the insulating plate is rusted and attached by sanding. Removes oil and other
40% to 50% (by weight) of glass beads and glass flakes having a particle size of 5 to 10 μm were added to bisphenol A type epoxy resin on each adhesive surface, and an adhesive prepared by adding a modified polyamidoamine as a curing agent was uniformly added. Apply
The bonded surface was fixed with a pressing jig that uniformly pressurizes, and cured and bonded under the conditions of an average pressure of 0.5 to 1 Kg / cm ² , 70 to 80 ° C., and 3 to 4 Hr. Tensile shear strength after curing is 70-8
The water absorption rate was 1 kg / cm ² , the water absorption rate was 0.03 to 0.06%, and the boiling water absorption rate was 0.23%. The reason why glass beads and glass flakes are added to the epoxy resin is to enhance the peel strength at the adhesive interface and to reduce the water absorption rate of the adhesive layer.

The length of the insulating plate depends on the track structure of the track to be used, and for the ballast structure, it is a little more than 1/2 of the length of the steel joint plate, and the two plates are made of steel butted together at the position corresponding to the rail joint. Stick to the seam plate. For rails with a solid roadbed structure like a railroad slab track, one piece with a length of approximately a steel joint plate is fixed.

Next, the above-described adhesive is applied to the surface of the flange of the insulating flanged tube shown in FIG. 1 in contact with the steel seam plate 2 and the outer periphery of the tube, and the steel seam plate 2 is bonded and integrated. Then, it is inserted into the fastening bolt hole 12 formed in the insulating plate 3 and integrated by heating and curing.

The strength of the insulating plate fixed to the rail insulating joint plate thus obtained has a pressure resistance of 53 Kg / mm ² ,
Loads 840 to 89 applied to the insulating plate portion when the vehicle passes
It has a strength of 6.3 times that of 0 Kg / cm ^2, and the conventional insulating plate (made of thermoplastic resin) has a lifespan of 30 million tons and a reduction rate of 75 to 90 with respect to the thickness of the initial insulating plate at 70 million tons. While the rolling phenomenon occurs in%,
The thickness reduction rate at the time of 60 million tons is 7 to 7.2%, and the difference in the elongation physical properties of each layer exerts an effect of appropriately absorbing the repeated load, and the life of the conventional product is about 8%. It was ~ 9 times.

The insulating joint for ballast tracks, which is constructed by using the rail insulating joint plate in which the two insulating plates of the present invention are fixed to the left and right steel joint plates, has durability against the step movement of the rail. Yes Insulation plate does not separate from steel splice board.

[0028]

The rail insulation joint plate according to the present invention does not need to be assembled with a large number of parts unlike the conventional insulation joints, and can be assembled efficiently in a short time, preventing forgetting to attach parts at any time, and assembling safety. It is rationalized and can withstand long-term use and contribute to safe driving of vehicles.

[Brief description of drawings]

FIG. 1 is a partial sectional view of an insulating joint portion of a rail of the present invention.

FIG. 2 is a partial cross-sectional view of an insulating joint portion of a conventional rail.

FIG. 3 is a lateral view of an insulating joint portion of a rail.

FIG. 4 is a model diagram showing a laminated state of insulating plates.

FIG. 5 is a perspective view of an insulating plate.

[Explanation of symbols]

 1 rail 2 steel joint plate 3 insulating plate 4 insulating flanged tube 5 fastening bolt 6 steel joint plate shoulder 7 insulating rail type 8 steel joint plate hem 9 insulating plate upper surface 10 insulating plate lower surface 11 insulating plate steel Seam plate fixing surface 12 Bolt hole G Glass fiber cloth V Vinylon cloth A Aramid fiber cloth A-G Aramid fiber and glass fiber mixed woven cloth

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Naoki Aihara 2-8, Hikari-cho, Kokubunji, Tokyo 38 Inside the Railway Technical Research Institute (72) Masazumi Ohashi 1-17 Katakura, Kanagawa-ku, Yokohama, Kanagawa Prefecture No. 310-402 (72) Inventor Yasuo Kunida 3-17-20 Nishiwaseda, Shinjuku-ku, Tokyo Within Kunida Giken Co., Ltd.

Claims (4)

(57) [Claims] 1. A glass fiber and aramid fiber mixed woven cloth is laminated on one surface of an alternating laminated body of vinylon cloth and aramid fiber cloth, and glass fiber cloth is laminated on both upper and lower surfaces of the laminated body and integrally molded with an epoxy resin. A rail insulating joint plate, characterized in that a hardened rail insulating plate is fixed to a rail joint surface side of a steel joint plate. 2. The rail insulating joint plate according to claim 1, wherein the side of the rail insulating plate on which the glass fiber and aramid fiber mixed woven cloth is laminated is fixed to a steel joint plate. 3. A rail insulating joint plate according to claim 1, wherein an insulating flanged tube obtained by curing a fiber cloth laminate with a resin is fixed in the hole for rail fastening bolts. 4. The rail insulating joint plate according to claim 1, 2 or 3, wherein an insulating layer is provided on the outer surface of the steel joint plate.