JPH09263240A - Rolling stock, and stringing contact accident prevention railroad system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a rolling stock from being damaged even when cut stringing is brought into contact with the roof of a rolling stock, by forming a roof whose structural body outside is formed with a conductive material layer and an electric insulation layer. SOLUTION: As a conductive material layer where a ground line 8 is brazed at the end part of a rolling stock structural body, a copper mesh 6a is bonded to the outer surface of a roof plate 3a with a phenolic resin adhesive 5b, and from the top side of the copper mesh 6a, room temperature curing 2-liquid mixing type urethane resin paint is applied. The liquid urethane rein paint is made to pass through the opening of the copper mesh 6a and penetrate to the surface of the roof 3a. The copper mesh 6a is coated with polyurethane resin paint film 5a as an electric insulation layer. It is thus possible to prevent a rolling stock from being damaged even when cut stringing is brought into contact with the roof of a rolling stock.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a railway vehicle and a railway system, and more particularly to a railway vehicle and a railway system for ensuring safety when an overhead wire is cut and comes into contact with the roof of the vehicle.

[0002]

2. Description of the Related Art For railways, AC voltage 2 is used as power for trains.
The electric power of 0000V and the direct current voltage of 1500V is supplied to the train by an overhead wire through a collector called a pantograph. In particular, the roof of a vehicle such as a train running in a DC section of a conventional line is usually provided with an insulating structure according to the railway structure regulations. Therefore, as shown in FIG. 9, a conventional vehicle roof, such as a train, has a roof cloth or polyurethane resin coating or the like on the outside of the roof plate 3a 'of the vehicle roof structure made of a metal material such as steel or aluminum. This is a structure in which an insulating layer 5 is provided.

When an accident such as cutting of the overhead line occurs, the overhead line 1 may come into contact with the roof of the vehicle. Therefore, the electric insulation layer 5 is provided on the roof, and even if it touches the roof of the vehicle, the electric insulation property of the electric insulation layer 5 prevents electric current from being applied to the vehicle body. However, the roof cloth and the electric insulating layer (insulating layer) 5 may be damaged and broken by the force when the overhead wire 1 is cut, and dielectric breakdown may occur when the roof portion is exposed.

Therefore, in general, as shown in FIG. 7, when the overhead wire 1 is cut and comes into contact with the vehicle roof,
A signal is transmitted to the breaker of the nearest substation via the railroad rail, the breaker is operated, and the power supply to the overhead line 1 is stopped. At this time, if the roof structure provided with the roof plate 3a 'is made of a metal material having excellent electric conductivity such as steel, the electric current will sufficiently flow through the vehicle and the rails, so that the substation The current of 2500 to 3500 A or more required to operate the circuit breaker is detected at the substation. Then, the failure selection device in the substation operates instantaneously, the circuit breaker operates, the power supply to the overhead wire 1 is stopped, and an overhead line contact accident such as vehicle burnout is prevented.

[0005]

On the other hand, in order to reduce the weight of a vehicle, a reinforced plastic material such as carbon fiber reinforced plastic (hereinafter sometimes referred to as CFRP) is used as a roof structure or a vehicle structure having a roof structure. Is being considered for use. By the way, in the case where the insulating layer 5 is damaged and broken by the force when the overhead wire 1 is cut and the roof portion is exposed to cause dielectric breakdown, CFRP is used for the roof structure or a vehicle structure including the roof structure. If so, the circuit breaker of the substation may not operate. Because CFRP has a considerable electric resistivity and does not have electric conductivity as much as a metal material, the electric current of 2500 to 3500 A necessary for operating the circuit breaker of the substation is passed through the railway rail, This is because it does not flow to the failure selection device in the substation. However, CFRP is not a completely insulating material because it contains carbon fibers. Therefore, in a CFRP vehicle, an electric current continues to flow from a contact overhead wire, an arc is generated, and the vehicle body (vehicle) is damaged. Even if the CFRP is made of nonflammable phenol resin, the vehicle body may be seriously damaged. There is.

The present invention has been made in view of the above circumstances, and it is possible to reduce the weight and prevent the vehicle from being damaged even when the cut overhead line comes into contact with the roof of the vehicle. An object of the present invention is to provide a railway vehicle and a railway system that are designed.

In order to solve the above problems, the inventors of the present invention simulate a roof structure by using a test circuit, and perform a pressure test, an arc test and an analysis on the simulated roof structure.
As a result of developing, testing and analyzing various prototype roof structures,
The present invention has been completed.

[0008]

According to a first aspect of the present invention, there is provided a railway vehicle having a roof having at least a conductive material layer and an electrically insulating layer formed outside a roof structure. .

According to a second aspect of the present invention, there is provided a railway vehicle characterized in that the roof structure is made of a reinforced plastic material.

A third aspect of the present invention is a railway vehicle characterized in that the roof structure is a roof structure of a vehicle structure integrally formed of a reinforced plastic material.

A fourth aspect of the present invention is a railway vehicle characterized in that the reinforced plastic material is carbon fiber reinforced plastic.

According to a fifth aspect of the invention, the conductive material layer comprises:
A railroad vehicle characterized by being composed of a metal mesh or a metal thin plate.

A sixth aspect of the present invention is a railway vehicle, wherein the conductive material layer is electrically connected to a rail.

According to a seventh aspect of the invention, there is provided a railway vehicle in which the electrically insulating layer is an electrically insulating coating film.

According to the invention of claim 8, a railway vehicle having an overhead wire and a roof having at least a conductive material layer and an electric insulating layer formed on the outside of the roof structure, a rail, and a current flowing through the rail. A fault selection device that detects overhead line faults,
A railway system comprising a substation equipped with a breaker capable of stopping power supply to an overhead line, wherein the conductive material layer, railway rail, and failure selection device are electrically connected. It is a railway system that prevents overhead contact accidents.

[0016]

1 to 4 are views showing an example of a railway vehicle of the present invention, and FIGS. 1 to 2 show a vehicle roof in which a conductive material layer is composed of a conductive mesh. , Fig. 3
4 to 4 are views showing a vehicle roof in which the conductive material layer is made of a conductive thin plate. As shown in FIGS. 1 to 4, the railway vehicle of the present invention includes a roof on which at least conductive material layers 6a and 6b and an electrically insulating layer 5a are formed outside the roof structure (outside the vehicle). is there. And, the roof of the railway vehicle shown in FIGS. 1 to 4 has conductive material layers 6a and 6b and an electric insulating layer 5 on the outside of the roof plate 3a stretched outside the roof structure.
a is formed, the roof plate 3a, the conductive material layers 6a, 6b,
The electric insulating layer 5a is integrated, and the surface of the roof is formed from the electric insulating layer 5a.

The roof structure is a structure that includes a roof plate and that substantially bears the strength of the roof of the vehicle. The roof structure is
Blocks wind and rain, withstands wind pressure while driving, pantograph,
Since it supports the weight of vehicle accessories such as air conditioners, it must have excellent rigidity and mechanical strength. Therefore, the roof structure has a roof plate and is reinforced by various ribs such as vertical girders.

The electrical resistivity of about 10 ^{@ 8} Omega · m steel, but no electrical conductivity enough metallic material such as aluminum, the electrical resistivity of the glass fiber reinforced plastic or the like of about 10 ¹⁵ Omega · m A material that does not have the electrical insulation properties of a plastic material (for example, an electrical resistivity at 20 ° C of 10 ^-6 to 10 ^-1)
When a conductive material layer is provided on the roof structure composed of (Ω · m), an overhead line contact accident is significantly prevented. Examples of such materials, carbon fiber reinforced plastic (its electrical resistivity is about 10 ^{@ 5} -10 ^{over 2 Ω} · m) reinforced plastic material such as a stainless steel or the like. If the electrically conductive material layer is provided on the roof structure made of carbon fiber reinforced plastic, the vehicle is lightweight and the effect of improving contact accidents with overhead lines is great.

The reinforced plastic material is a material in which the mechanical strength of plastic is reinforced with a reinforcing material such as fiber.
Reinforced plastic materials are as excellent in rigidity and mechanical strength as metal materials, and have a remarkably small specific gravity as compared with conventional materials for roof structures such as steel and aluminum, and thus are characterized by being lightweight. Examples of the plastic include thermosetting resins having excellent heat resistance and durability such as phenol resin and epoxy resin, and examples of the reinforcing material include high strength fibers such as metal fibers and carbon fibers.

Among the reinforced plastic materials, carbon fiber reinforced plastic, which is particularly excellent in mechanical strength, durability and light weight, is particularly preferable as a constituent material of the roof structure,
Among them, a carbon fiber reinforced phenol resin in which a phenol resin is reinforced with carbon fiber is preferable. This is because the carbon fiber reinforced phenolic resin has excellent mechanical strength and the like and also has nonflammability.

It is not absolutely necessary that only the roof structure is made of a reinforced plastic material. Rather,
The roof structure is preferably a roof structure of a vehicle structure integrally formed of a reinforced plastic material. The vehicle body structure is a vehicle body basic structure for ensuring the strength of the vehicle body. In the example, as shown in FIG. 5A, the roof structure 3 is provided with side structures, and the roof structure 3 is formed integrally with structures such as a gable structure and a floor structure. FIG.
As shown in (a), the roof structure 3 is the roof portion of the vehicle structure 10 that is integrated with the side structure and the like.
Is integrated with the side structure, etc., the strength of the roof structure 3 is high. In addition, the vehicle is lightweight and has high strength. In addition, CFR
The roof structure 3 made of reinforced plastic such as P is shown in FIG.
As shown in FIG. 5, in order to enhance strength, rigidity, etc., a large number of reinforcing ribs such as the stringers 4b are provided inside the vehicle.

The conductive material layer is for flowing an electric current from the overhead wire to the rail when the insulating layer is broken and the cut overhead wire comes into contact with the conductive material layer, and is excellent in electrical conductivity. Composed of materials. The material having excellent electric conductivity is a material containing a metal having an electric resistivity (electrical resistivity at 20 ° C., the same applies hereinafter) of 10 ⁻⁸ to 10 ⁻⁵ Ω · m. The conductive material layer can be formed on a part of the surface of the roof plate, but is preferably formed on substantially the entire surface of the roof plate. The conductive material layer (conductive layer) is a material such as a metal mesh (mesh formed by knitting a wire containing metal), a thin metal plate, a metal punching metal, or the like having good conductivity, or a plastic film made of these materials. It is formed from a sheet material or the like laminated with. Copper is 1.72 × 10 ^{over 8}
Ω · m and aluminum are particularly preferable metals because they have an electric resistivity of 2.75 × 10 ⁻⁸ Ω · m.

Examples of the mesh (mesh) include a mesh formed by knitting metal wires such as copper and aluminum. The number of meshes (number of openings per inch) is 3
-20 mesh can be used. When the openings are coarse as described above, the coating material and the like for forming the electric insulating layer easily pass through the openings, so that the mesh and the coating film are easily integrated.

A preferable metal thin plate has a thickness of 0.00
A plate of 1 to 1 mm of a highly conductive metal such as copper or aluminum can be used. If it is thinner than 0.001 mm, the electrical conductivity and mechanical strength are inferior, and if it is thicker than 1 mm, it is not preferable in terms of its mounting workability and vehicle weight reduction.

The conductive material layer is grounded to the rail. Grounding is done by attaching a ground wire to the layer of conductive material and electrically connecting the tip of the ground wire to the rail.

The electrically insulating layer is a layer for preventing an electric current from flowing to the vehicle even if a cut overhead wire comes into contact with the roof of the vehicle as long as the electrically insulating layer is not destroyed. Therefore, it is preferable that the electrical insulating layer is made of a material having an electrical resistivity of 10 ¹² to 10 ¹⁵ Ω · m. An example of such a material is synthetic resin. When a coating material of synthetic resin such as polyurethane resin or epoxy resin is used, an electrically insulating coating film having an electrical resistivity of about 10 ¹⁵ Ω · m can be easily formed, and the coating film is preferably used as the electrically insulating layer. . Polyurethane resin has good adhesion to the roof plate and the conductive material layer, and is also excellent in electrical insulation. Further, a rubber-like elastic body such as polyurethane resin is an elastic body, and thus is a particularly preferable constituent material of the electric insulating layer.

The preferred thickness of the electrically insulating layer is 1.2-2.
5 mm. When the thickness is less than 1.2 mm, the strength is low and the conductive sheet material cannot be sufficiently covered. 2.5 mm
Thicker is excessive and uneconomical.

The outer surface of the roof is formed of an electrically insulating layer,
It is preferred that the electrically insulating layer integrates the roofing sheet and the conductive material layer. When the conductive material layer is composed of a mesh, it is not always necessary to separately provide an adhesive layer for integrating the roof plate and the mesh. This is because it is possible to integrate the roof plate and the mesh with a synthetic resin paint having electrical insulation and adhesiveness. However, when the conductive material layer is composed of a thin plate having no holes, in order to integrate the roof plate and the thin plate,
An adhesive layer is required between them. The adhesive layer can be formed using a phenol resin adhesive.

When the overhead wire is cut, the electric insulating layer is damaged and broken, and the roof portion is exposed to cause dielectric breakdown,
Moreover, the CF is applied to the roof structure or the vehicle structure including the roof structure.
Even if RP or the like is used, the current from the overhead line is
The conductive material layer of the vehicle of the present invention, the grounded ground wire, and the railway rail flow, and the current thereof is 2500 to 3500A or more. Therefore, as shown in FIG.
(B) A railroad vehicle having a roof on which at least a conductive material layer and an electric insulating layer are formed on the surface of the roof structure, (c) a railroad rail, and (d) an overhead wire disconnection caused by an electric current flowing through the railroad rail. What is claimed is: 1. A railway system, comprising: a failure selection device that detects a failure of an overhead wire; and a substation that includes a circuit breaker that can stop power supply to the overhead wire based on a signal from the failure selection device. If the material layer, railway rails, and failure selection device are electrically connected, a railway system that can prevent an overhead line contact accident is constructed.

[0030]

Hereinafter, the present invention will be described in detail. -Example 1- The railway vehicle of the present invention having the structure shown in FIGS. 1 and 2 was manufactured as follows. First, a vehicle structure made of carbon fiber reinforced phenolic resin was manufactured as follows.
A vehicle structure made of carbon fiber reinforced phenolic resin was manufactured by integrally drawing a carbon fiber reinforced phenolic resin in which phenolic resin was reinforced by carbon fiber, and joining the obtained plates having reinforcing ribs. FIG. 5 is a view showing the vehicle structure, and FIG. 5 (a) is a perspective view thereof.
FIG. 5B is a perspective view of the roof structure portion of the vehicle structure as seen from the inside of the vehicle. The vehicle structure 10 has a roof structure 3, and all of the structures such as the roof structure 3, side structures, gable structures, floor structures, etc. are integrated, and is a hexahedral structure composed of carbon fiber reinforced phenolic resin. there were. The specific gravity of the carbon fiber reinforced phenolic resin is 1.5 at 20 ° C.
And the electrical resistivity was 3 × 10 ⁻⁵ Ω · m.

The roof structure 3 is, as shown in FIG.
A reinforcing plate 4a, a stringer 4b, and a girder 4c are provided inside the vehicle as reinforcing ribs 4, and a planar roof plate 3a (thickness 2.1 mm) having a curvature is stretched outside these reinforcing ribs. It was a thing. The stringer 4b was integrally formed with the roof plate 3a by pultrusion, and was made of carbon fiber reinforced phenolic resin. The jumper plate 4a is a member for connecting the roof plate 3a, is a member for assembling the vehicle structure, and is made of carbon fiber reinforced phenol resin, and the long girder 4c is a member for assembling the vehicle structure.
Made of aluminum.

Then, a copper mesh as a conductive material layer and an electrically insulating coating film as an electrically insulating layer are provided on the outside of the roof plate 3a of the vehicle structure 10 as follows.
A railway vehicle of the present invention having the structure shown in was produced. A copper mesh 6a brazed to the ground wire 8 at its end is attached to the outer surface of the roof plate 3a with a phenol resin adhesive, and a room temperature curable two-component mixed urethane resin coating is applied from above the copper mesh 6a. Was applied to a thickness of about 1.5 mm. The liquid urethane resin paint passed through the openings of the copper mesh 6a to reach the surface of the roof plate 3a and filled the openings of the copper mesh 6a. When left at room temperature for one day, the paint solidified, the roof plate 3a and the copper mesh 6a were integrated, and the vehicle of the present invention was obtained. The end of the ground wire 8 was electrically connected (grounded) to the rail.

As shown in FIGS. 1 and 2, the vehicle roof of this embodiment has a conductive material layer (copper mesh) 6a and an electric insulating layer (polyurethane resin coating) on the outside of the roof plate (CFRP) 3a. Film) 5a is formed, and the conductive material layer 6a is formed.
Is adhered to the roof plate 3a with a phenol resin adhesive layer 5b, the conductive material layer 6a is covered with an electric insulation layer (polyurethane resin coating) 5a, and the outer surface of the roof is further covered with an electric insulation layer (polyurethane resin coating). ) 5a.

The copper mesh 6a used was a mesh of knitted copper wire, the diameter of the copper wire was 0.3 mm, and the number of openings per inch was 6 (6 mesh).

Further, the inside of the roof structure 3 is 50 m thick.
By attaching m of glass wool (heat insulating material), etc., a practical vehicle could be obtained.

-Example 2-A railway vehicle having a roof shown in FIGS. 3 and 4 was manufactured as follows. Same as the first embodiment, the first embodiment is provided on the outer surface of the roof plate 3a of the vehicle structure 10 made of carbon fiber reinforced phenolic resin.
In the same manner as above, a phenol resin adhesive was applied, and an aluminum thin plate 6b having a thickness of 0.3 mm with an end portion brazed with the ground wire 8 was laminated on the liquid coating film. When left as it was at room temperature for one day, the adhesive hardened, and the aluminum thin plate 6b was adhered to the roof plate 3a through the phenol resin adhesive layer 5b. The end of the ground wire 8 was electrically connected (grounded) to the rail.

Next, the urethane resin coating material was further applied to the aluminum thin plate 6b to a thickness of about 1.5 mm. When left for one day at room temperature, the urethane resin coating solidified and the vehicle of the present invention was obtained. As shown in FIGS. 3 and 4, the vehicle roof of this embodiment has a roof plate (C
A conductive material layer (aluminum thin plate) 6b, an electric insulating layer (polyurethane resin coating film) 5a on the outside of FRP) 3a
And the conductive material layer 6b is integrated with the roof plate 3a by a phenol resin adhesive layer 5b, and the conductive material layer (aluminum thin plate) 6b is covered with an electric insulating layer (polyurethane resin coating film) 5a. The outer surface of the roof was formed by the electric insulation layer (polyurethane resin coating film) 5a. Furthermore, on the inside of the roof structure 3, a thickness of 5
By attaching 0 mm glass wool, etc., it was possible to make a practical vehicle.

Test Examples 1 to 3, Comparative Examples 1 to 2 What kind of roof structure 3 is used when a DC electric wire or a trolley wire comes into contact with the roof structure 3 of a vehicle and the insulating coating film is damaged. The following model tests were conducted to examine whether they would be affected. First, the external dimensions are 1000 mm wide x 600 mm long
The test specimen of was prepared.

Specimen of Test Example 1: In place of the aluminum thin plate having a thickness of 0.3 mm of Example 2, a thickness of 0.0
A plate material manufactured in the same manner as in Example 2 using a 15 mm aluminum foil. That is, the structure of the sample is glass wool having a thickness of 50 mm, roofing sheet 3a made of carbon fiber reinforced phenolic resin / phenolic resin-based adhesive layer / 0.015 mm aluminum foil / polyurethane resin coating film. Specimen of Test Example 2: A plate material having the same structure as the roof of Example 2. That is, the structure is glass wool having a thickness of 50 mm, roofing sheet 3a made of carbon fiber reinforced phenol resin / phenol resin adhesive layer / aluminum thin plate having a thickness of 0.3 mm / polyurethane resin coating film. Specimen of Test Example 3: A plate having the same structure as the roof of Example 1. That is, the structure is 50 mm thick glass wool / carbon fiber reinforced phenolic resin roof plate 3a material /
(6 mesh copper mesh + 1.5 mm thick polyurethane resin coating film).

Specimen of Comparative Example 1: Used in Example 1,
A plate material in which glass wool having a thickness of 50 mm is attached to the back surface of a roof plate portion 3a made of carbon fiber reinforced phenol resin and a polyurethane resin coating film having a thickness of 1.5 mm is provided on the other surface. That is, the structure is 50 mm thick glass wool / carbon fiber reinforced phenolic resin roof plate 3a material / thickness 1.5
mm polyurethane resin coating film. Specimen of Comparative Example 2: A plate material in which glass wool having a thickness of 50 mm is attached to the back surface of an aluminum thin plate having a thickness of 2.0 mm and a polyurethane resin coating film having a thickness of 1.5 mm is provided on the other surface. That is, the composition is glass wool with a thickness of 50 mm /
It is an aluminum thin plate having a thickness of 2.0 mm / a polyurethane resin coating film having a thickness of 1.5 mm.

-Arc test- In order to clarify the effect of the cut overhead wire coming into contact with the vehicle roof, an arc test was carried out using the above-mentioned specimen. As shown in FIG. 6, an arc test was carried out by assembling a test circuit in which the polyurethane resin coating film surface was a positive electrode of 1500 V DC and the surface of the carbon fiber reinforced phenolic resin roof plate 3a or the aluminum thin plate 6b was the negative electrode side. . Measuring circuit: A measuring circuit (not shown) was connected to the positive electrode side and the negative electrode side in FIG. The measuring circuit is composed of a shunt, a disconnecting device, a rectifier, a circuit breaker, a reactor, a variable resistor, an AC circuit breaker, etc., so that the current flowing through the measuring circuit during an arc test, the time required to break the circuit breaker, etc. can be measured. did. Arc test: 3 mm on the polyurethane resin coating of the specimen
A scratch of about 20 mm was made, a thin electric wire of about 0.2 mm ² was brought into contact with the scratch, and 1500 V DC was applied. The measured circuit resistance was set to 0.06Ω, and the estimated short-circuit current was set to 25000A, assuming that the cut overhead wire came into contact with the vehicle roof at a location 1 km away from the substation. The results of the arc test are shown in Table 1.

[0042]

[Table 1]

During the arc test, since the polyurethane resin coating film had a scratch, an arc was generated by the applied voltage of DC 1500V. As can be seen from Table 1, the maximum current (maximum breaking current) due to the difference in the structure of the test piece is larger in the order of Comparative Example 1, Test Example 1, Test Example 3, Test Example 2, and Comparative Example 2. That is, the aluminum foil, the aluminum thin plate, and the copper mesh are laminated on the surface of the carbon fiber reinforced phenolic resin roof plate, and the current easily flows, and the time required for the circuit breaker to break (total breaking time) is 26 to 29 m.
It was found to be as short as s (millisecond).

The cross-sectional states of the arc test portion of the test piece after the arc test are shown in FIGS. The results of the cross-section observation of the arc test portion were as follows. Arc test part of the sample of Comparative Example 1: As shown in FIG. 8C, in the arc part after the test of this example, about 6 to 7 layers of the CFRP 10 layer were peeled off and burned out. The area (damaged area) was about 14 cm ² . Arc test part of test piece of Test Example 2: As shown in FIG. 8A, about 4 to 5 layers of the CFRP 10 layer were peeled off, and the damaged area was about 6 cm ² . Arc test part of the specimen of Test Example 3: As shown in FIG. 8B, no layered peeling was observed. There was almost no damaged area.

From the above results of observing the cross section of the arc portion, the damage degree of the arc portion was the largest in Comparative Example 1 having no conductive material layer, followed by Test Example 2 having an aluminum thin plate and Test Example having a copper mesh. In order of 3, the damage area and the damage degree of Test Example 3 having the copper mesh were slight. That is, in the case where the conductive material layer was laminated on the roof plate of the carbon fiber reinforced phenolic resin, the damage due to the arc was remarkably improved. In other words, it has been found that the arc damage that occurs when the overhead wire contacts the vehicle body is reduced.

[0046]

As described above, since the conductive material layer and the electric insulation layer are formed on the roof of the railway vehicle of the present invention, the vehicle is safe against an overhead line contact accident. In other words,
Even if the overhead wire is cut and comes into contact with the vehicle roof, and the electrical insulation layer breaks, causing a dielectric breakdown, a large current of 2500 to 3500 A or more flows through the conductive material layer, the ground wire, and the railroad rail, and it is instantaneous. It is a vehicle that can prevent an overhead line contact accident by operating a failure selection device and a breaker at a substation closest to the power station and stopping power supply to the overhead line. Further, even if the vehicle structure is made of a reinforced plastic material such as carbon fiber reinforced phenolic resin, it is possible to prevent an overhead line contact accident, so that the weight of the vehicle can be reduced. Furthermore, by using the railway vehicle of the present invention, a railway system capable of effectively preventing an overhead line contact accident is configured.

[Brief description of drawings]

FIG. 1 is a partially cutaway view showing a roof of a vehicle according to an embodiment of the present invention.

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

FIG. 3 is a partially cutaway view showing a roof of a vehicle according to another embodiment.

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

5A and 5B are diagrams showing an example of a vehicle structure, FIG. 5A is a perspective view of a vehicle structure, and FIG. 5B is a perspective view of a roof structure of the vehicle structure.

FIG. 6 is a diagram showing an arc test method.

FIG. 7 is a diagram showing a railway system for preventing an overhead line contact accident.

FIG. 8 is a sectional view of an arc test portion. (A),
(B) shows the state of the arc portion after the arc test in the test example and (c) in the comparative example.

FIG. 9 is a partially cutaway view showing a roof of a conventional vehicle.

[Explanation of symbols]

1 ... overhead line, 2 ... pantograph, 3 ... roof structure, 3
a ... Roof plate, 4, 4a, 4b, 4c ... Reinforcing ribs
5, 5a ... Electric insulating layer, 5b ... Adhesive layer, 6a, 6b
..Conductive material layer, 8 ... Ground wire, 10 .. Vehicle structure

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasufumi Suzuki 2-8, Hikarimachi, Kokubunji, Tokyo 38 Inside the Railway Technical Research Institute (72) Toshikatsu Ito 2-8, Hikarimachi, Kokubunji, Tokyo 38 Within the Railway Technical Research Institute (72) Inventor Koji Aji 2-8, Hikarimachi, Kokubunji, Tokyo 38 Inside the Railway Technical Research Institute (72) Inventor Katsuji Taneda 1-1, Sanbonmatsucho, Atsuta-ku, Nagoya-shi, Aichi No. Japan Vehicle Manufacturing Co., Ltd. (72) Inventor Masayoshi Yamagiwa 1515 Tsutsui, Matsumae-cho, Iyo-gun, Ehime Prefecture Toray Co., Ltd. Ehime Plant

Claims (8)

[Claims] 1. A railway vehicle having a roof having at least a conductive material layer and an electrically insulating layer formed outside a roof structure. 2. The railway vehicle according to claim 1, wherein the roof structure is made of a reinforced plastic material. 3. The railway vehicle according to claim 1, wherein the roof structure is a roof structure of a vehicle structure integrally formed of a reinforced plastic material. 4. The railway vehicle according to claim 2, wherein the reinforced plastic material is carbon fiber reinforced plastic. 5. The conductive material layer is composed of a metal mesh or a metal thin plate.
The railway vehicle described in. 6. The railway vehicle according to claim 1, wherein the conductive material layer is electrically connected to the rail. 7. The railway vehicle according to claim 1, wherein the electrically insulating layer is an electrically insulating coating film. 8. A railway vehicle equipped with an overhead wire and a roof having at least a conductive material layer and an electrical insulating layer formed outside the roof structure, a rail, and an electric current flowing through the rail to detect a failure of the overhead wire. A railway system comprising a failure selection device and a substation equipped with a circuit breaker capable of stopping power supply to an overhead line, wherein the conductive material layer, the rail, and the failure selection device are electrically connected. An overhead line contact accident prevention railway system characterized by being connected.