JP7339869B2 - bogie covers for railway vehicles - Google Patents

Description

The present invention relates to a bogie cover that covers the bogie surroundings of a railway vehicle, and in particular, a side soundproof cover for absorbing noise around the bogie of a high-speed railway vehicle and preventing snow and ice from adhering to the bogie. The present invention relates to a technology effectively applied to a bogie cover such as an end closing plate for protecting against impact and preventing foreign matter from entering underfloor equipment.

In high-speed railway vehicles such as the Shinkansen (registered trademark), a cover for preventing noise is provided on the side of the bogie as a countermeasure against noise. However, for rolling stock equipped with a bogie cover to prevent noise, when it snows, snow adheres to the inside of the bogie cover and turns into ice blocks, which fall during running and cause damage to wayside facilities on the track. It has occurred. Therefore, while the train is stopped at the station, it is necessary to scrape off the accumulated snow on the inner side of the bogie cover, which poses a problem of requiring time and manpower.

Therefore, it is conceivable to install a heater on the inside of the bogie cover to melt the snow. The truck cover is arranged in this way, and when a snow melting heater is provided, there is a restriction that the thickness of the heater must be designed to be as small as possible.

Patent documents 1 and 2, for example, disclose inventions related to truck covers that absorb noise around the truck and prevent snow and ice from adhering to the truck cover.
Among these, the noise-absorbing snow melting panel described in Patent Document 1 has an outer surface plate and an inner surface plate having a plurality of through holes, and a honeycomb core in which the outer surface plate is bonded to one side and the inner surface plate is bonded to the other surface. A member, a bar-shaped heating means fixed to the surface of the inner plate of the surface member at a predetermined interval, and a plate-shaped sound absorbing member having a sound absorbing property disposed on the opposite side of the surface member with the heating means interposed therebetween. It is designed to

Further, the noise-preventing carriage cover described in Patent Document 2 includes a supporting member having a recess of a predetermined shape, a noise absorbing panel attached to the recess of the supporting member, and a noise absorbing panel disposed on the surface side of the noise absorbing panel. and a surface member that is arranged on the surface side of the heat-generating member and capable of absorbing sound. , a mat-like porous sound absorbing material arranged on the surface side, a honeycomb core adhered to one surface of the porous sound absorbing material, and foamed resin filled in each cell of the honeycomb core. It is designed to

Japanese Patent No. 4286805 Japanese Patent No. 4399299

The sound-absorbing panel described in Patent Document 1 and the noise-preventing truck cover described in Patent Document 2 both use a honeycomb core in order to improve the sound absorption characteristics, and the surface of the honeycomb core is contacted with the honeycomb core. Alternatively, a sheet-like heating element is provided so as to be sandwiched between two honeycomb cores. From this, it can be seen that the inventions described in Patent Documents 1 and 2 use the sound absorbing member and the heat generating member as members having separate functions. Moreover, since the honeycomb core is used as the sound absorbing member, the weight of the cover is heavy, resulting in an increase in vehicle weight. In addition, when performing maintenance work, it is necessary to remove the carriage cover. However, since the carriage cover is heavy, there is a problem that the burden on the operator is increased.

In addition, the bogie covers (soundproof covers that cover the sides) described in Patent Document 1 and Patent Document 2 both have honeycomb-core sound-absorbing panels to improve soundproofing performance, and heat-generating elements to help melt snow. The idea is to provide a bogie cover that also has a function. By providing a sound absorbing panel and a heat generating element, the thickness of the entire bogie cover becomes thicker than when only the heat generating element is provided. Therefore, when it is applied to a soundproof cover that covers the sides of the bogie, it must be applied to a vehicle of a type that has a fairly wide space between itself and the sides of the bogie.

On the other hand, the railway vehicle examined by the present inventors is a vehicle of a vehicle type in which the gap between the soundproof cover and the side of the bogie is so narrow that it is impossible to install the honeycomb core sound absorbing panel. This was done in the process of developing a soundproof cover with a snow-melting function to be used for such types of vehicles. In addition, since the existing soundproof cover for vehicles satisfies the prescribed soundproof function, we thought that it was important to provide a snow melting function while suppressing the increase in weight rather than improving the soundproof effect.

Furthermore, as described in Patent Document 1, an increase in noise is expected as the speed of the vehicle increases. Therefore, the present invention was developed under the idea that priority should be given to weight reduction without positively providing a sound absorbing function to the soundproof cover. In other words, the present invention does not simply omit the sound absorbing panel from the bogie cover of the inventions of Patent Document 1 and Patent Document 2 in order to achieve a slim profile.

The present invention has been made in view of the above background. To provide a bogie cover for a railway vehicle capable of preventing adhesion of ice.
Another object of the present invention is to provide a bogie cover for railway vehicles that can suppress the leakage of noise around the bogie to the outside and prevent snow and ice from adhering to the bogie cover, which can be efficiently manufactured. That's what it is.

In order to achieve the above object, the present invention
a support layer made of fiber-reinforced plastic with insulating fibers as a reinforcing material and having a predetermined shape and predetermined strength;
a heating layer containing a planar heater and bonded to the inner surface of the support layer;
a protective layer that incorporates a reinforcing cloth inside and is bonded to the surface of the heat generating layer opposite to the support layer,
The support layer, the heat generating layer, and the protective layer are formed in an integrated state with a common resin ,
The planar heater is configured such that the lower portion thereof is folded up to a predetermined height via an insulating layer .

According to the bogie cover having the above configuration, since there is no honeycomb core sound absorbing panel, the overall thickness can be reduced to suppress an increase in weight while suppressing noise around the bogie from leaking to the outside. At the same time, it is possible to prevent snow and ice from adhering to the inner side by generating heat from the planar heater of the heat generating layer. As a result, it is possible to reduce the burden on the operator during maintenance work. In addition, since the supporting layer, the heat generating layer and the protective layer are integrated with a common resin, the noise around the bogie is suppressed from leaking to the outside and snow and ice are prevented from adhering. It is possible to efficiently manufacture a bogie cover that can be used.
In addition, by folding the planar heater up to a predetermined height, the amount of heat generated at the bottom of the cover can be increased. can be effectively prevented.

Here, desirably, the lower end is curved so that the angle of inclination with respect to the vertical plane increases as the lower end approaches the truck side, or the lower end is formed to have a shape inclined so as to approach the truck side. Configure.
With such a configuration, the carriage and the cover can be made thin so that they do not come into contact with each other when passing through a curve.

Further, preferably, the end portions of the protective layer are positioned inside the end portions of the support layer, and the end portions of the heat-generating layer are positioned inside the end portions of the protective layer. and the sizes of the heating layer and the protective layer are set,
The protective layer is formed up to the outside of the end of the heat generating layer.
According to this configuration, since the protective layer is formed up to the outside of the end portion of the heat generating layer, the heat generating layer can be made difficult to peel off, and the service life of the bogie cover can be lengthened.

Also, preferably, the reinforcing cloth is made of aramid fiber.
According to such a configuration, the cloth made of the aramid fiber is strong enough to be used in bulletproof vests, so the durability of the protective layer can be improved. Cloth made of glass fiber may be used instead of aramid fiber.

In addition, desirably, the end closing plate is arranged in front and behind the bogie of the railway vehicle,
A heat insulating material layer is interposed between the protective layer and the heat generating layer.
With such a configuration, heat generated in the heat-generating layer can be suppressed from escaping toward the underfloor equipment, so snow and ice can be effectively prevented from adhering to the end covering plate.

According to the railcar bogie cover of the present invention, it is possible to suppress the noise around the bogie from leaking to the outside while suppressing an increase in weight by reducing the overall thickness. Further, according to the present invention, it is possible to prevent snow and ice from adhering to the inner side of the cover, particularly to the lower portion which is greatly curved or inclined. Furthermore, it is possible to efficiently manufacture a bogie cover capable of suppressing leakage of noise around the bogie to the outside and preventing adhesion of snow and ice.

(A) is an external perspective view of a bogie of a railroad vehicle provided with the bogie cover of the present invention, and (B) is an enlarged cross-sectional view of a main part including the bogie and soundproof cover of the railroad vehicle. (A) is a front view showing the configuration of the inner surface of the side soundproof cover as the bogie cover for the railcar of the present invention, and (B) is a cross-sectional side view showing the cross-sectional structure of the side soundproof cover. It is an enlarged sectional view of the lower panel of the side soundproof cover in embodiment. FIG. 4 is an enlarged cross-sectional view showing a configuration example of an end blocking plate to which the present invention is applied;

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a railcar bogie cover according to the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration example of a bogie cover for a high-speed railway vehicle according to an embodiment.
A bogie 10 as shown in FIG. 1A is provided at the lower part of the vehicle body of the high-speed rail vehicle 1, and around this bogie 10, noise around the bogie leaks to the outside and snowfall adheres to the bogie component parts. A trolley cover is provided to prevent In this specification, among the bogie covers, the covers 20 provided on the left and right sides of the bogie 10 are referred to as side soundproof covers, and the covers 30 provided on the front and rear of the bogie 10 are referred to as end blocking plates. . In addition, the higher concept of the side soundproof cover and the end blocking plate is called a bogie cover.

As shown in FIG. 1(B), the side soundproof cover 20 of the bogie cover is formed into a three-dimensional curved shape in which the lower end is positioned on the bogie side. In this embodiment, a planar snow melting heater 21 is provided on the inner surface of the side soundproof cover 20 to prevent snow and ice from adhering to the cover. In FIG. 1B, reference numeral 11 denotes wheels and reference numeral 12 denotes air springs. If the side soundproof cover 20 has a curved shape in which the angle of inclination with respect to the vertical plane increases toward the bottom as shown in FIG. becomes easier. The same is true when the lower portion of the cover is inclined toward the bogie.

Next, the details of the side soundproof cover 20 provided with the snow melting heater 21 will be described with reference to FIG. 2A is a front view showing the configuration of the inner surface of the side soundproof cover 20, and FIG. 2B is a cross-sectional side view showing the cross-sectional structure of the side soundproof cover 20. FIG.
The side soundproof cover 20 of this embodiment includes an upper panel 20A having a substantially vertical shape and a lower panel 20B having a shape whose lower end is curved toward the truck. A bent piece 20a bent inward at 90° is formed at the lower edge of the upper panel 20A, and a bent piece 20b bent inward at 90° is formed at the upper edge of the lower panel 20B. The bent pieces 20a and 20b are joined together and fastened with a plurality of bolts 22 to integrate the upper panel 20A and the lower panel 20B.

Reinforcing portions 23a and 23b formed in the vertical direction are provided on the lower panel 20B. Planar snow melting heaters 21A, 21B, 21C is provided.
As shown in FIG. 3, the lower panel 20B has a cover base material 25 arranged on the outside, and planar snow-melting heaters 21A (21B, 21C) joined to the inner surface. ) is entirely covered with a protective sheet 26 .
Although not particularly limited, in the present embodiment, the cover base material 25 is formed of a polyester-based FRP (fiber reinforced plastic) with glass fiber as a reinforcing material, and has a desired strength. It is set to a thickness (approximately 5 mm). As a result, the thickness of the entire cover is about 7 mm to 10 mm.

The snow melting heaters 21A (21B, 21C) are woven of fibrous heating elements such as carbon nanotubes as wefts in a cloth woven from, for example, insulating fibers at predetermined intervals. 2/3 of the lower side is folded back and an insulating sheet 27 made of glass fiber is interposed to form a sandwich structure. It is In FIG. 2, reference numerals 28a and 28b are wirings for supplying power to the snow melting heaters 21A to 21C, and reference numeral 29 is a junction box.

According to the findings of the present inventors, ice and snow are more likely to adhere to the inner lower portion of the side soundproof cover of the bogie. Therefore, by making the lower side of the snow melting heater 21A (21B, 21C) a folded structure as described above, the amount of heat generated on the lower side of the cover is greater than that on the upper side, thereby enhancing the snow melting efficiency on the lower side. Adhesion of ice and snow to the inner lower part of the soundproof cover 20 is suppressed. In addition, even if ice and snow adhere to the inner side of the side soundproof cover, the heating of the heater melts the contact area of the ice and snow.

A cloth made of aramid fiber such as aromatic polyamide resin is used for the protective sheet 26. It is joined to the cover base material 25 and integrally molded with resin.
More specifically, in a predetermined mold, a plurality of semi-cured FRP molding material sheets called prepreg containing insulating glass fiber as a reinforcing material are laminated, and a planar snow melting heater is placed thereon. After stacking and further covering with a cloth protective sheet, the same resin (e.g. polyester resin) as that impregnated in the prepreg is injected from above the protective sheet to impregnate the lower layer of prepreg. The lower panel 20B is formed integrally by curing by performing pressurization and heat treatment.

In addition, by using a cloth made of aramid fiber as the protective sheet 26 as described above, it is excellent in resin impregnation and suitable for integral molding, and is also convenient for molding a three-dimensional cover. Furthermore, since cloth made of aramid fibers is strong enough to be used in bulletproof vests and is hard to tear, the protective layer containing the protective sheet 26 made of aramid fibers has excellent durability.
In addition, the edge of the snow melting heater 21 is positioned inside the edge of the protective sheet 26, and the edge of the protective sheet 26 is positioned inside the edge of the cover base material 25, so that the protective sheet 26 melts the snow. Since the entire surface of the heater 21 is impregnated with resin and hardened while covering the ends of the heater 21, there is an advantage that the ends of the protective sheet 26 and the snow melting heater 21 are less likely to peel off.

The structure and manufacturing method of the side soundproof cover 20 are not limited to the above embodiment. It is also possible to attach a planar heater to the surface with an adhesive and cover the protective sheet 26 thereon. However, the cover can be manufactured more efficiently by integral molding as described above. Also, the protective sheet 26 is not limited to the aramid fiber cloth, and a cloth or sheet formed of other materials such as glass fiber may be used. Furthermore, the upper panel 20A and the lower panel 20B may not be divided into an integrated panel.

Next, a configuration example in which the present invention is applied to the end covering plate 30 of the bogie shown in FIG. 1A will be described.
As shown in FIG. 4, the end blocking plate 30 of the present embodiment has a structure in which a cover base material 31, a planar snow melting heater 32, a protective sheet 33, and a heat insulating material 34 are laminated and integrally molded with resin. have. An insulating sheet 27 is inserted in the folded portion of the snow melting heater 32 .

In the case of the vehicle for which the present inventors examined the application, the distance between the front and rear parts of the bogie to the lower component parts of the vehicle was large compared to the side, and the space was wide. Thickness could be increased.
Therefore, in this embodiment, as shown in FIG. 4, a heat insulating material 34 is interposed between the protection sheet 33 and the snow melting heater 32 which are integrally formed. In this way, by providing the heat insulating material 34 on the side of the underfloor equipment, the heat generated by the snow melting heater 32 is suppressed from escaping to the side of the underfloor equipment, and the heat insulating material is not provided when the performance of the snow melting heater 32 is the same. The snow-melting effect on the side of the truck can be enhanced compared to the conventional one.

It should be noted that the end blocking plate 30 having a configuration in which the heat insulating material 34 is omitted in FIG. 4 is also possible. As a material of the heat insulating material 34, for example, foamed resin obtained by combining polyolefin such as polyethylene with polystyrene can be considered.
In addition, in the side soundproof cover 20 shown in FIG. 3, if there is a relative distance from the carriage, a heat insulating material similar to the heat insulating material 34 shown in FIG. It is also possible to insert a material to suppress heat from escaping to the underfloor equipment side of the cover base material 25, thereby further enhancing the snow melting effect.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications and changes are possible. For example, in the bogie cover in the above embodiment, only the snow-melting heater as a planar heat-generating member is provided inside the bogie cover. A structure in which absorption layers are stacked may be used.

Further, in the above-described embodiment, the case where the present invention is applied to the curved or inclined side soundproof cover 20 or the end blocking plate 30 has been described, but the present invention can also be applied to a flat bogie cover.
Furthermore, in the above embodiment, the case where the present invention is applied to the bogie cover of a railway vehicle has been described, but the present invention is not limited to this, and can also be used for the side cover of a vehicle such as a bus. can.

10 bogie 11 wheel 12 air spring 20 side soundproof cover (bogie cover)
21 Snow melting heater (heat generating layer)
25 cover base material (support layer)
26 protective sheet (protective layer)
27 Insulating sheet (insulating layer)
30 end closing plate (truck cover)
31 cover base material (support layer)
32 Snow melting heater (heat generating layer)
33 protective sheet (protective layer)
34 insulation

Claims (5)

a support layer made of fiber-reinforced plastic with insulating fibers as a reinforcing material and having a predetermined shape and predetermined strength;
a heating layer containing a planar heater and bonded to the inner surface of the support layer;
a protective layer that incorporates a reinforcing cloth inside and is bonded to the surface of the heat generating layer opposite to the support layer,
The support layer, the heat generating layer, and the protective layer are formed in an integrated state with a common resin ,
A bogie cover for a railway vehicle , wherein a lower portion of the planar heater is folded back to a predetermined height via an insulating layer . The lower end is curved so that the inclination angle with respect to the vertical plane increases as the lower end approaches the truck, or the lower end is inclined toward the truck. bogie cover of the railway vehicle described in . The support layer and the heat-generating layer are arranged such that the end of the protective layer is positioned inside the end of the support layer, and the end of the heat-generating layer is positioned inside the end of the protective layer. The size of the protective layer is set,
3. The bogie cover for a railway vehicle according to claim 1, wherein the protective layer is formed up to the outside of the ends of the heat generating layer. The bogie cover for a railway vehicle according to any one of claims 1 to 3, wherein the reinforcing cloth is a cloth made of aramid fiber or glass fiber. An end closing plate disposed in front and behind a bogie of a railway vehicle,
5. The railcar bogie cover according to claim 1, wherein a heat insulating material layer is interposed between the protective layer and the heat generating layer.