JPH1120694A - Coupler cover for high speed head vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve resistance for bird collision strength of a coupler cover by making the main part out of a fiber reinforced plastic plate of uniform thickness of a specified value and more and constituting the cover by a plate in which a structural member for reinforcing is not integrated. SOLUTION: In a head vehicle, a machine body 3 which is located at a location covering a crew member room is constituted of a plastic composite material. The main part of the machine body 3 is made of a composite material of a sandwich structure in which a core 3b of a polymethacrylimide foaming material is laminated inside high elastic FRP skins 3a.3c of 2 inside and outside layers in which carbon fiber is made as reinforced material. The machine body 3 has strength for bending, tension and shearing within a plane by actions of the skins 3a.3c and is provided with rigidity for bending on the outside of the plane by adding the action of the core 3b. Thus, the machine body 3 displays necessary strength as the machine body of the head vehicle and can be prevented from being destroyed even if the machine body 3 repeatedly receives a pressure difference on the inside and outside when the machine body 3 enters a tunnel or receives a bird collision on the outside face.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coupler cover attached to a first (or last) vehicle among high-speed vehicles such as a Shinkansen.

[0002]

2. Description of the Related Art As shown in FIG. 6, the leading vehicle of a Shinkansen has a so-called semi-monocoque structure made of metal. That is, a metal outer plate 41 also made of an aluminum alloy or the like is provided outside a metal frame 42 made of an aluminum alloy or the like.
The structure is constituted by sticking.

A coupler 9 is provided at the forefront of the leading vehicle (further forward of the structure in FIG. 6; the same applies to the rear of the tail vehicle), as shown in FIG. 3 (b). A coupling cover (10 in FIG. 3) is attached to cover. Conventionally, the connector cover has a metal semi-monocoque structure similarly to the other structural parts. That is, as shown in FIG. 4A, the conventional connector cover 20 is formed by integrating a metal frame 22 for reinforcement inside a metal plate 21.

In order to construct the structure of the leading vehicle and the coupler cover as described above, a metal frame (42, etc.) is first assembled, and a metal outer plate (41, etc.) is applied to the outside thereof.
The outer plate is moved along the frame by hitting it with a hammer and the like, and the two are integrated by welding. In the process, since the surface of the outer plate has irregularities, putty is applied to flatten the irregularities, and the surface of the putty is polished smoothly to finish.

[0005]

In recent years, there has been a proposal between vehicle technicians to convert the structure of a high-speed leading vehicle to FRP (ie, fiber reinforced plastic). If the structure of the leading vehicle having a three-dimensional curved surface is made to be a metal semi-monocoque structure as in the past, there is a disadvantage that it takes considerable man-hours to integrate the frame with the outer plate and finish the surface as described above. Therefore, the structure is manufactured by FRP to reduce the number of man-hours. As a reference prior art for a high-speed vehicle using a composite material, Japanese Patent Application Laid-Open
JP-A-345567 and JP-A-7-96833.

[0006] The FRP of the leading vehicle structure is preferably realized for all the parts shown in FIG.
Especially for the connector cover part,
Is easy to use and has many cost benefits.
It is significant to promote P. It is easy to realize in terms of strength because the coupler cover does not seal the inside unlike the outer wall of the portion after the pressure bulkhead 5 (portion where the crew etc. gets on) shown in FIG. It is. Since the inside is not sealed, there is no pressure difference between the outside and the inside due to wind pressure even when entering a tunnel or the like. Therefore, rigidity in the out-of-plane direction is not required for the coupler cover.
Also, the reason why the cost merit is great is that, unlike the rear part, the coupler cover mainly consists of a three-dimensional curved surface in the leading vehicle, so if the metal semi-monocoque structure is used as before, the integration This is because finishing is not easy. That is, the FRP of the coupler cover has a great effect of reducing the number of manufacturing steps.

However, there are the following problems in making the coupler cover FRP. In other words, although there is no pressure difference between the inside and outside due to the wind pressure, it is advantageous in terms of strength, but if it does not have sufficient strength, it will be connected when birds such as crows and flying birds collide (so-called bird collision). The container cover may be damaged. Bird collisions rarely occur on conventional lines, but often occur on high-speed vehicles such as Shinkansen. In addition, the impact energy associated with bird collisions increases significantly with the increase in collision speed (and, consequently, the traveling speed of the vehicle). In a vehicle, it is an important factor in setting the strength. FIG.
In the case of the coupler cover 10 as shown in FIG. 3B, the impact is particularly large in the front part where the inclination angle is large. Considering the fact that, unlike an aircraft, a vehicle is not replaced immediately after a bird collision, it must be strong enough to be used repeatedly.

[0008] In order to manufacture the connector cover 30 made of FRP by attaching a reinforcing member 32 such as a rib inside the plate 31 as shown in FIGS. Although it is possible, according to an experiment by the inventors, in such a cover 30, there occurs a problem that the space between the plate 31 and the reinforcing member 32 (for example, the joint 32 a) is separated. This is considered to be because the impact at the time of the bird collision is concentrated on the boundary between the reinforcing member 32 and the plate 31. From the viewpoint of eliminating or simplifying the partial reinforcement in the other structure connected to the connector cover, it is preferable that the impact at the connector cover is widely dispersed.

[0009] In consideration of the strength condition of not receiving a pressure difference between the inside and outside due to wind pressure, it is necessary to reduce the cost of the coupler cover. If the coupler cover has the same strength as the outer wall of the crew compartment or the like that receives not only bird collision but also a pressure difference between the inside and outside, the cost increases and the cost of the vehicle is affected.

An object of the invention described in each claim is to solve the above-mentioned problems, such as making the connector cover of the leading vehicle FRP and increasing the bird-resistant strength of the connector cover.

[0011]

According to the first aspect of the present invention, there is provided a coupler cover for a high-speed leading vehicle, wherein a main portion is a fiber reinforced plastic plate (ie, FRP plate) having a uniform thickness of about 10 mm or more. (In other words, such FRP
(A monocoque structure of a plate). The term "main part" as used herein refers to a part excluding a part connected to another structural part and its vicinity.

In the connector cover according to the first aspect, a monocoque structure of an FRP plate is adopted, and a structural member for reinforcement (such as a rib shown in FIG. 4B) is not integrated, so that a bird collision is prevented. The impact force at that time does not concentrate on a specific member or its vicinity, and therefore, there is no inconvenience that the member peels or is broken. Also, in terms of making the thickness of the main part uniform, this coupling cover can receive the impact force by widely dispersing the impact force. When the impact force is dispersed, the coupling cover itself is not easily broken, and there is no possibility that the impact force is intensively transmitted to a specific location to other structures connected to the connector cover. There is no need to reinforce the part.

Further, since the thickness of the main part of the FRP plate is set to about 10 mm or more, the coupler cover satisfies the bird impact resistance required for practical use. Since the FRP plate cannot absorb impact energy due to plastic deformation, it is necessary to absorb the energy within the range of elastic deformation. However, as described above, this connector cover having a thickness of 10 mm or more requires that the conditions be met. It can fill and usually completely rebound the bird with only elastic deformation. If the impact energy cannot be absorbed within the elastic deformation range, the FRP plate may absorb the energy due to an increase in surface energy due to separation of the matrix resin and the internal fibers. However, this is nothing less than the destruction of the internal microstructure, so even if there is no apparent damage from a single bird impact, repeated impacts can severely damage the cover. Such a coupling cover with a main part thickness of about 10 mm or more usually does not cause such a destruction or visible destruction due to a single bird impact. The fact that the coupler cover has such a bird impact resistance is explained as follows based on a statistical investigation by the inventors and original experiments.

First, according to a survey, 95% of the animals colliding with vehicles running on the ground are birds weighing 1.25 kg or less. According to the experiment, the connector cover manufactured as a monocoque structure of the FRP plate (the inclined cover as shown in FIG. 3B)
It has been found that the minimum thickness at which no destruction (including the destruction of the microstructure described above) occurs due to such a bird collision is about 10 mm. That is,
The connector cover according to claim 1, which is made of an FRP plate,
Irrespective of the type of P (the type of matrix or fiber, etc.), if the thickness is 10 mm or more, there is almost no destruction by bird collision. It is conceivable that large birds exceeding 1.25 kg may be destroyed when colliding, but such cases are rare, and even in such cases, most of the destruction is due to the microstructural destruction described above. As long as the cover is replaced at an appropriate frequency, there is no practical problem. This coupler cover also has the advantage that it does not need to be repaired since it does not dent unlike metal ones.

In addition, the connector cover according to the first aspect can be constructed at low cost. If the FRP plate has a thickness of only about 10 mm or a little more than that and does not integrate other reinforcing members, the material cost is low. not high. This point is different from the outer wall of the crew room etc., in that the pressure difference between the inside and the outside is not applied to the connector cover, so that the thickness is increased or other materials are used to secure the rigidity in the out-of-plane direction. It is based on the fact that there is no need for lamination or the like, and this has the advantage of reducing the cost of the coupler cover and further the entire vehicle.

The coupler cover according to the second aspect is characterized in that the F
The reinforcing material of the RP plate is made of glass fiber.

FRP using glass fiber as a reinforcing material (that is, GFRP) is flexible and has a large range that can be elastically deformed, so that it can absorb more impact energy than FRP having other reinforcing materials. For example, when compared to FRP using carbon fiber as a reinforcement (that is, CFRP),
Although it is inferior in elastic modulus and tensile strength, the maximum impact absorption energy is much larger. Therefore, GFRP is preferable as a material of a member that receives an impact force due to a bird collision, and the connector cover according to claim 2 can be reduced in thickness within a range of elastic deformation without causing the above-described destruction even if the thickness is considerably reduced. The impact force can be absorbed. In addition, since the GFRP is flexible, even when there is a slight step between the other structural parts based on a manufacturing error or the like, the coupler cover is elastically deformed without difficulty and the structural part is deformed. Enables the combination of

In addition, since the GFRP is relatively inexpensive, the coupler according to claim 2 has an advantage of being manufactured at low cost and suppressing the cost of the vehicle. Note that recent G
The market price of FRP is around one third of that of CFRP.

According to a third aspect of the present invention, there is provided the coupler cover according to the above-described FRP.
The thickness of the plate near the joint with the other structural part (the joint and its periphery) is made thinner than that of the main part, and the coupling with the structural part is formed by a shaft (bolt or the like) in the thickness direction. Piercing (so-called shear-type fasteners).

In a portion to be connected to another structure, strength is exhibited by both the connector cover and the structure, and the impact energy due to the bird collision is absorbed by both. Therefore, there is no inconvenience in strength near the joint even if the thickness is smaller than the main part as in the cover of the second aspect. Rather, it is advantageous to reduce the thickness of the vicinity of the joint in terms of material cost and weight, and furthermore, there is an advantage that the coupler cover is easily elastically deformed in the vicinity thereof and the connection with other structures becomes easy.

As described above, the coupler cover is not required to have rigidity against out-of-plane bending, but a force (pulling, twisting, etc.) accompanying deformation of the vehicle acts from the above-mentioned joint. The coupling cover according to the third aspect of the present invention is thinned in the vicinity of the connecting portion as described above and is connected to other structural parts by using a shear type fastener. Can withstand. The reason why it is preferable to use a shear fastener in the thinned portion as described above is as follows.

Since the FRP plate does not have the deformability as much as the metal plate, the holes for passing the shafts (bolts, etc.) of the fasteners are processed by actual matching (that is, the holes are not provided in advance, but are connected. The actual process is to match with the other party's structure and then process it at the assembly site). But,
Since the FRP plate is difficult to process, it is difficult to form a large-diameter hole by matching the actual product, and the diameter is at most 10 mm. If the diameter of the hole is limited, it is inevitable to use a shaft with a small diameter as the shaft to be used, but if the plate to be joined such as the connector cover is thick despite the shaft being thin,
The function of the fastener is likely to be insufficient because the shaft body is bent or inclined. On the other hand, if a shearing type fastener is used after the connecting portion is thinned as in the case of the coupler cover according to the third aspect, inconvenience such as bending of the shaft is unlikely to occur. Exhibits sufficient strength.

In order to prevent the coupling cover (particularly, the vicinity of the joint) from being damaged by the shearing force transmitted from the shaft of the fastener, for example, the FRP plate forming the coupling cover may be provided in the vehicle. Approximately 45
The fibers should be oriented in such a way that they intersect at an angle.
Since the direction of the shearing force transmitted from the shaft to the coupler cover is almost always in the front-rear direction of the vehicle or at right angles thereto, if the fibers are arranged as described above, the shearing force is applied along the fibers to the coupler cover. This is because it is easy to disperse widely and it is difficult to concentrate on a specific place.

According to a fourth aspect of the present invention, there is provided the coupler cover according to the above-described FRP.
An epoxy resin having a curing temperature of 100 to 130 ° C. is used as a matrix of the plate.

The epoxy resin having such a high curing temperature is obtained by polymerizing with vinyl, polyethylene, or the like to form a so-called polymer blend, and after solidification, becomes a relatively soft but highly tough resin. (Conversely, a resin having a low curing temperature shows a hard and brittle property after solidification.) In other words, since the above resin has a large elastic deformation range, the FRP plate using the matrix as a matrix has a larger impact energy that can be absorbed than that using the other resin as a matrix, and receives an impact force due to a bird collision. preferable. Therefore, the connector cover according to claim 4 can absorb a large impact force within the range of elastic deformation without breaking even if the thickness is thin. In addition, since the connector cover is flexible, the connector cover can be easily elastically deformed to facilitate the connection with other structural parts.

The connector cover according to claim 5 is characterized in that the FRP plate is cured by an autoclave molding method.

In the autoclave molding method in which a plastic part is cured in an autoclave, pressure is also applied at the time of heating, so that it is difficult to generate air bubbles inside the part. This is because, by the applied pressure, gas contained inside the fibers and the like is prevented from becoming bubbles. If there is an air bubble inside the FRP plate, the damage may progress from the bubble as a starting point, but as described above, the FRP plate is hardened by the autoclave molding method. Since bubbles are unlikely to exist inside, there is an advantage that they are not easily destroyed even in the event of a bird collision or the like. In addition, the autoclave molding method is lower in cost than the method of applying a mold (pressing mold) from both sides of the FRP plate and heating, because the required number of molds is smaller.

It should be noted that the coupler cover according to the first aspect is F
Although the thickness of the main part of the RP plate was about 10 mm or more,
The minimum required thickness can be determined according to the type (mixing) of the FRP plate and the like. For example, glass fiber is used as a reinforcing material according to the above description, and the curing temperature is 100 to 130.
In the case of using an FRP board cured by an autoclave molding method using an epoxy resin at a temperature of ° C. as a matrix, a minimum of 8 mm is sufficient for the main part.

[0029]

1 to 3 show an embodiment of the present invention. FIG. 1 is a perspective view of the coupler cover 10, and FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1 (and FIG. 3), showing a vicinity of a coupling portion with the structure 3 or the like. FIG. 3 is a perspective view (FIG. 3 (a)) and a side view showing the entirety of a leading vehicle 1 of a Shinkansen train with a maximum speed setting close to 300 km / h, which is a railway vehicle to which the coupler cover 10 is attached. It is a figure ((b)).

In the leading vehicle 1 shown in FIG. 3, the structure 3 located at a position covering the crew compartment is made of a plastic composite material. As shown in FIG. 2, the main part of the structure 3 is provided inside two layers of high elasticity FRP (CFRP) skins 3a and 3c using carbon fiber as a reinforcing material.
This is a composite material having a sandwich structure (total thickness of about 50 mm) in which a core 3b of a polymethacrylimide foam material that is a heat-resistant structural foam material is laminated. However, as shown in FIG. 2, the connecting portion with the other member does not include the core 3b, and the skin 3a
Only the plate 3d of high elastic CFRP which is the same material as 3c is used. The structure 3 made of such a composite material has strength against in-plane bending, pulling, shearing and the like mainly due to the action of the skins 3a and 3c, and also against out-of-plane bending and the like by combining the actions of the core 3b and the like. Has rigidity. Therefore, the structure 3 exhibits the necessary strength as the structure of the leading vehicle 1 without integrating other frames, and even when repeatedly receiving a pressure difference between the inside and the outside when entering the tunnel, It will not be destroyed even if a bird hits the outside.

Since the structure 3 made of a composite material has little work to be added from the inside after being attached to the leading vehicle 1, it is attached to the vehicle 1 almost at the last stage of the assembling process of the vehicle 1. Can be. In other words, unlike the structure shown in FIG. 6, which must be assembled early in the assembly process because the metal plate needs to be welded to the inner frame or the metal plate must be hit from the inside,
The structure 3 may be mounted after mounting various devices and electrical components on the vehicle 1. Therefore, in the vehicle 1 that uses the composite structure 3, it is extremely easy to mount the devices and components.

As shown in FIG. 3, most of the structure 4 connected to the rear and lower parts of the structure 3 is mainly composed of a flat plate or a simple quadric surface. It adopts the same aluminum alloy semi-monocoque structure as the one used. This is because it is relatively easy to integrate a flat plate or a quadratic curved surface along a metal plate after assembling the frame, and the subsequent finishing does not require much man-hour.

The coupler cover 10 shown in FIG. 3 of the leading vehicle 1 has a monocoque structure of an FRP plate together with the cap 2 at the tip. That is, as shown in FIG. 1, a single-layer FR having a substantially uniform thickness and no reinforcing member is included.
The cover 10 is constituted by a P plate. Since most of the FRP plate is formed by a three-dimensional curved surface, similarly to the case of the structure 3, even though a frame and a metal plate are integrated and a finishing die is prepared rather than being finished. This is because the production cost is lower when using the FRP plate. The monocoque structure that does not include any reinforcing member is based on the experimental results of the inventors that when the reinforcing member is attached, the member causes peeling and the like due to the impact when receiving a bird collision, and rather has low durability. Based. Also,
The single-layer FRP plate that is simpler than the structure 3 is required to have rigidity in the out-of-plane direction because it is in front of the pressure bulkhead 5 and there is no pressure difference between the inside and the outside, although the birds are hit. It is not done. The angle of the inclined surface of the coupler cover 10 in the mounted state is about 15 ° on average with respect to the front-rear direction of the vehicle 1 as shown in FIG. Make 40 °.

The FRP plate constituting the connector cover 10 is made of an epoxy resin having a curing temperature of 100 to 130 ° C. and containing glass fiber as a reinforcing material (GFRP), and almost all parts except the peripheral part are used. (The main part 10a shown in FIG. 2) has a thickness of 10 mm. GFRP using such an epoxy resin as a matrix has high toughness, is flexible and has excellent shock absorption properties, so it can absorb the impact of a bird collision within the range of elastic deformation even with such a thickness. That's it. The cover 10
Is formed by laminating a prepreg (a glass fiber impregnated with a prepolymer), which is a material of an FRP plate, on a mold (not shown) having a shape along the outer surface shown in FIG. Into an autoclave (not shown) and heat
This is performed by applying pressure.

The thickness of the vicinity of the periphery of the connector cover 10 is reduced in consideration of coupling with other members. That is, as shown in FIG. 2, the thickness of the connecting portion 10c that is overlapped and connected to the structure 3 (similarly to the portion corresponding to the structure 4 and the cap 2) is 6 mm, and the thickness of the main portion 10a (10 m
m) is gradually reduced to the thickness (6 mm) of the coupling portion 10c in the intermediate portion 10b having a width of about 100 mm.

The connecting portion 10c thus thinned and the structure 3
(The same applies to the structure 4 and the cap 2) are connected by a fastener 11 shown in FIG. Fastener 11
Is to connect the cover 10 (the joint 10c thereof) and the structure 3 (the plate 3d) by bolts penetrating in the thickness direction, and the force between the cover 10 and the structure 3 is transmitted through the shearing force applied to the bolts. It is a shear-type fastener that performs transmission. As shown in FIG. 1, the hole 10d provided near the periphery of the cover 10 is
Immediately before assembling, it is φ10m so that it is not difficult to process because it is aligned with the hole of the counterpart member and processed on site.
m, but this limits the thickness of the bolt, so it is reasonable to make the joint 10c thinner as described above. This is because if the bolt of the shear fastener 11 is thin even though the connecting portion 10c is thick, the bolt is bent and sufficient force is not transmitted.
The interval (pitch) at which the fasteners 11 are provided is made as small as about 100 mm in consideration of the thin bolt.

The plate 3d of the structure 3 to which the coupler cover 10 is connected has its tip bent downwardly connected to the upper end of the pressure bulkhead 5 by bolts 6. Structure 3
The pressure barrier 5 and the pressure bulkhead 5 are combined in this manner and then assembled to the vehicle 1. As described above, various devices and parts are already mounted inside the structure 3 (and the pressure bulkhead 5) attached to the vehicle 1 as described above.
0 when the cover 10 is detached for the purpose of using the coupler 9 (FIG. 3 (b)) or the like.
Since operation from the inside cannot be performed at all, fastener 1
As 1, a so-called blind fastener is used. Because it is a blind fastener, fastener 11
For fixing screws (female screws) and removing bolts in
All can be done from outside the cover 10.

FIG. 5 shows that the connector cover 10 is made of a single-layer FRP.
These are some of the experimental results on which the board was constructed. That is, in this experiment, the cover 1 was a rectangular plate having the same area as the coupler cover 10 shown in FIG.
A single-layer FRP plate (that is, not including a reinforcing member) of the same material having the same thickness of 10 mm as that of 0 (the symbol ○ in the drawing) and a thickness of 9 mm with a reinforcing member attached as shown in FIG. 6m
4 (a) and a 2 mm thick aluminum plate (symbol □) with an aluminum frame for reinforcement as shown in FIG. 4 (a) (both have the same area and shape). Simulated bird collision. The angle of inclination of each plate for the experiment was set to 10 to 25 ° in accordance with the average value of the actual angle of inclination in the cover 10 of the vehicle 1 and 1.25 like a bird.
kg of gelatin was bumped into the center of each plate at a speed of 300 km / h.

As shown in FIG. 5, in the case of an FRP plate having a thickness of 10 mm without a reinforcing member, even if the inclination angle is slightly large (25 °), damage may occur due to the collision of the gelatin. None (white symbols indicate intact in the figure). On the other hand, in the case of the other plates, some damage occurred (black symbols indicate damaged ones). In other words, FR with a reinforcing member
In the case of the P plate, a part of the reinforcing member was peeled off from the main body of the plate, and in the case of an aluminum plate with a frame, the plate was greatly recessed with the frame.

[0040]

The coupler cover for a high-speed leading vehicle according to the first aspect has the following effects. 1) Since the impact force in the event of a bird collision is not widely dispersed and concentrated on a specific member, etc., the coupler cover itself is not easily broken, and other structures connected to it are partially reinforced. The need to do is low.

2) Since the FRP plate having a thickness of about 10 mm or more absorbs the impact energy due to the bird collision within the range of the elastic deformation, the bird collision resistance required for practical use is satisfied.

3) Since the material is an FRP plate which is not integrated with other reinforcing members, it is constructed at low cost.

The coupler cover according to claim 2 has the following effects. 4) Since the FRP plate using glass fiber as a reinforcing material is used, the range in which elastic deformation is possible is large. Therefore, even if the thickness is small, the impact energy of a bird collision can be smoothly absorbed and breakage hardly occurs. Since it is flexible, there is an effect that it can be easily connected to other structural parts.

5) It is configured at a lower cost than when using an FRP plate having another reinforcing material.

The coupler cover according to claim 3 is: 6) Since the vicinity of the joint portion is thinned and then joined to another structural part by using a shear-type fastener, the fastener exhibits sufficient strength; Sufficient force is transmitted between the coupled coupler cover and the other structure.

The connector cover according to claim 4 further uses 7) an FRP plate having a matrix of an epoxy resin having a high curing temperature, so that it can absorb a large impact energy. Therefore, even if the thickness is small, the impact energy due to the bird collision can be smoothly absorbed within the range of the elastic deformation without causing the destruction. Since it is flexible, there is an effect that it can be easily connected to other structural parts.

In addition to the above, the connector cover according to claim 5 is excellent in mechanical properties such as bird impact resistance because 8) bubbles are hardly present inside the FRP plate based on the molding method.

[Brief description of the drawings]

FIG. 1 is a perspective view of a connector cover 10 according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II in FIGS. 1 and 3, showing the vicinity of a joint between the coupler cover 10 and the structure 3 or the like.

FIG. 3 is a perspective view (FIG. 3 (a)) and a side view (FIG. 3 (b)) showing the entire front vehicle 1 with the coupler cover 10 attached thereto.
It is.

FIG. 4 is a perspective view showing a conventional metal connector cover 20 (FIG. 4 (a)), a perspective view showing a connector cover 30 generally planned for FRP (FIG. 4 (b)), and c thereof. It is -c sectional drawing (the same (c)).

FIG. 5 is a graph showing the results of a simulated bird collision experiment.

FIG. 6 is a perspective view showing a general structure of a high-speed leading vehicle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lead vehicle 3.4 Structure 10 Coupling cover 10a Main part 11 Fastener

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Masaaki Konishi 1 Kawasaki-cho, Kakamigahara-shi, Gifu Prefecture Inside Kawasaki Heavy Industries Gifu Factory (72) Inventor Koichi Ogura 1 Kawasaki-cho, Kakamigahara-shi, Gifu Prefecture Kawasaki Heavy Industries Gifu Factory, Inc. Inside

Claims (5)

[Claims] 1. A cover for covering a coupler of a high-speed leading vehicle, wherein the main part has a uniform thickness of about 10 mm or more, and a fiber-reinforced plastic in which a structural member for reinforcement is not integrated. A coupling cover for a high-speed leading vehicle, which is made of a plate. 2. The coupler cover according to claim 1, wherein the fiber reinforced plastic plate is made of glass fiber as a reinforcing material. 3. The above-mentioned fiber reinforced plastic plate becomes thinner than the above-mentioned main part in the vicinity of a joint part with another structural part, and is connected to the structural part by a fastener whose axial body penetrates in the thickness direction. The coupler cover of a high-speed leading vehicle according to claim 1 or 2, wherein: 4. The fiber-reinforced plastic plate according to claim 1, wherein
The coupler cover of a high-speed leading vehicle according to any one of claims 1 to 3, wherein an epoxy resin having a curing temperature of 0 to 130C is used as a matrix. 5. The connector cover for a high-speed leading vehicle according to claim 1, wherein said fiber reinforced plastic plate is cured by an autoclave molding method.