JP2005255003A - Truck cover for high speed railway vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light weight truck cover for a high speed railway vehicle effectively absorbing noise around the truck and capable of preventing snow and ice from being deposited thereon. <P>SOLUTION: The truck cover 5 for the high speed railway vehicle 1 is provided with a support member 7 provided with a recessed part 6 having a predetermined shape; a noise absorption panel 8 attached to the recessed part 6 of the support member 7; a sheet-like heat generation member 9 arranged at a surface side of the noise absorption panel 8; and a surface member 10 arranged at a surface side of the heat generation member 9 and capable of absorbing the sound. The truck cover is constituted such that the support member 7, the noise absorption panel 8, the heat generation member 9 and the surface member 10 are bonded respectively. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a bogie cover for a high-speed railway vehicle, and more particularly to a high-speed railway vehicle capable of absorbing noise around the bogie of the high-speed railway vehicle and preventing snow and ice from adhering to the bogie cover. It relates to the bogie cover.

  Conventionally, in high-speed railway vehicles such as Shinkansen, various noise countermeasures are taken so that the noise level falls below a predetermined noise environment regulation value. As shown in FIG. 9 (A), the noise generated when the railway vehicle travels includes noise from around the carriage 103, such as contact sound between the wheels 101 and the rails 102 and driving sound of the wheels 101, and wind noise of the pantograph 104. And noise from around the pantograph 104 such as a contact sound between the pantograph 104 and the overhead line 105, and noise from around the vehicle body 106 such as aerodynamic sound caused by friction between the vehicle body 106 and air.

  As shown in FIG. 9A, noise generated from the underfloor equipment of the carriage 103 and the railway vehicle 100 is dealt with by providing a soundproof wall 113 or the like, and any measures are taken on the vehicle side. The current situation is not.

  A sound absorbing panel 107 having a structure as shown in FIG. 9B is known as a means for reducing noise around the vehicle body 106. The sound absorbing panel 107 is arranged at a position spaced apart from the base member 108 by a base member 108 attached to the vehicle body 106 side, a U-shaped interval holding member 109, and the base member 108 by the interval holding member 109. The sound absorbing material 110 is made of a porous material, and the band plate 111 is disposed on the surface side of the sound absorbing material 110 and fixes the sound absorbing material 110 to the spacing member 109.

  In this sound absorbing panel 107, a cavity 112 is formed by a base member 108 and a spacing member 109 on the back side of the sound absorbing material 110, and noise is reduced by resonating with this cavity 112, By acting together with the sound absorbing material 110, noise is absorbed. In addition, a punching metal and cloth are further arranged on the surface side of the sound absorbing panel 107 to further reduce aerodynamic noise, and the sound absorbing panel is attached to the inner side of the carriage cover, more specifically on the side of the carriage, so that noise from around the carriage is reduced. Some have been proposed to reduce.

At the time of filing this application, the applicant knows the following as a document in which the above technical information is described.
JP 2002-67941 A

  By the way, in the future, higher speed railway vehicles are expected to increase in speed. For example, when the maximum operating speed is currently 275 km / h, but this is 360 km / h, the noise is approximately proportional to the square of the speed. Therefore, the noise may increase by about 70% or more than the current level, but the noise from the pantograph 104, the body 106, and the underfloor equipment can be dealt with to some extent by the current technology. On the other hand, it is necessary to take further noise countermeasures for noise generated around the carriage 103 below the vehicle body 106.

  However, since the conventional sound absorbing panel 107 obtains sound absorbing characteristics by the resonance action of the cavity 112, the cavity 112 needs to have a predetermined thickness (45 mm or more). Further, since the sound absorbing panel 107 is formed in a flat plate shape, the sound absorbing panel 107 is arranged in a string shape with respect to the curved surface of the arc-shaped cart cover when arranged inside the cart cover. Protruded greatly to the cart side. From these things, in what is proposed in the above-mentioned Japanese Patent Application Laid-Open No. 2002-67941, by providing the dolly cover with the sound absorbing panel 107, the thickness of the dolly cover increases and interferes with the dolly. There was a problem that the weight of the cart cover increased.

  Further, in the conventional sound absorbing panel 107, noise is absorbed by the resonance of the cavity portion 112. Therefore, as shown by a one-dot chain line in FIG. 5, the sound absorbing characteristic is exhibited at a specific frequency and can be absorbed. However, the sound absorption characteristics could not be exhibited in a wide frequency band such as 500 Hz to 2000 Hz.

  Furthermore, in the conventional sound absorbing panel 107, the sound absorbing material 110 on the surface side is weak in structure, and when the high-speed railcar enters and exits the tunnel, a pressure fluctuation of about 200 Pa occurs, and the sound absorbing material is caused by the pressure fluctuation. 110 is greatly deformed, and it is conceivable to prevent the sound absorbing material 110 from being deformed by narrowing the interval of the interval holding member 109 and increasing the number thereof, but the sound absorbing material 110 is a flange portion of the interval holding member 109. And the band plate 111 are attached, and the sound absorption effect cannot be expected at this attachment portion, and when the interval holding member 109 is increased, the portion that does not exhibit the sound absorption effect increases, and a desired sound absorption characteristic cannot be obtained. is there.

  In addition, there is a great turbulence in the air flow around the bogie, and foreign objects such as pebbles on the ground can be wound up by the air flow and collide with the bogie cover. However, when the conventional sound absorbing panel 107 is placed inside the bogie cover The sound absorbing material 110 on the surface side is weak and the sound absorbing panel 107 may be damaged.

  By the way, conventionally, a cover made of a lightweight aluminum alloy has been proposed. However, although it is lightweight, some of the weight exceeds 100 kg, and a truck that is essential for safe operation is maintained. When removing and removing the cart cover for inspection, it was not easy to handle.

  Also, the carriage is attached to the vehicle body so that it can be steered, and it is necessary to form the carriage cover into a three-dimensional curved surface so that the carriage cover does not interfere with the carriage, but aluminum alloy is formed into a three-dimensional curved surface. In order to do so, a large press mold is required, which may increase the cost of manufacturing the bogie cover. For this reason, the bogie cover has not been adopted so far from the standpoint of maintenance and inspection of the bogie and cost.

  In addition, high-speed railway vehicles are required to exhibit their performance sufficiently even in cold regions, and as shown in FIG. Snow 114 and ice may cause problems in the carriage 103 and the vehicle body 106. For this reason, at present, work for removing snow 114 and ice adhering to a stationary vehicle is being carried out, and the removal work is difficult. If the work is delayed, the scheduled operation of the train is affected.

  Therefore, in view of the above circumstances, the present invention provides a bogie cover for a high-speed railway vehicle that is lightweight and can effectively absorb noise around the bogie and prevent snow and ice from adhering to it. It is to be an issue.

  The bogie cover for a high-speed railway vehicle according to the present invention includes a “support member having a recess having a predetermined shape, a noise absorbing panel mounted in the recess of the support member, and a surface side of the noise absorbing panel. A sheet-like heat generating member and a surface member disposed on the surface side of the heat generating member and capable of absorbing or transmitting sound, and the support member, the noise absorbing panel, the heat generating member, and the surface member are coupled to each other. It has a configuration.

  Here, the bogie cover of the high-speed railway vehicle of the present invention is applied to a cover that covers the front and rear, the left and right sides, and the upper side except the lower side of the bogie. Moreover, the recessed part of a support member is provided in the back side (cart side) of a cart cover at least, and may be provided in both surfaces of a cart cover.

  According to the bogie cover of the high-speed railway vehicle of the present invention, the noise absorbing panel is mounted in the concave portion of the support member, the surface member is disposed on the heat-generating member on the sheet, and they are integrally coupled. . Since the surface member of the carriage cover can absorb or transmit sound, noise around the carriage can be effectively absorbed by the surface member and the noise absorbing panel.

  In addition, since the heat generating member is provided, it is possible to prevent snow and ice from adhering to the carriage cover by generating heat, and the surface member is disposed on the surface side of the heat generating member. Further, it is possible to prevent the heat generating member from being damaged due to a foreign object such as pebbles directly colliding with the heat generating member.

  In addition, when the noise absorbing panel has a high heat insulating property, the heat generated from the heat generating member can be prevented from being absorbed by the noise absorbing panel, whereby the heat from the heat generating member can be efficiently It is transmitted to the member side, so that the thermal efficiency can be increased and the power consumption of the heat generating member can be kept low.

  In addition, it is desirable to use a noise absorbing panel that is formed so as to follow the curved shape of the bogie cover. This makes it possible to reduce the thickness of the bogie cover as much as possible. Interference can be avoided.

  In addition to the above-described configuration, the bogie cover of the high-speed railcar according to the present invention includes: “The noise absorbing panel is disposed on the surface side, and a porous sound absorbing material in which short fibers are formed in a mat shape, and the porous sound absorbing material. It is also possible to adopt a configuration in which the honeycomb core is bonded to one surface of the material, and each cell of the honeycomb core is filled with a filler made of foamed resin. Here, the short fiber is not particularly limited in specific configuration, but a lightweight, flame-retardant or non-flammable metal or non-metal formed into a short fiber shape can be used.

  According to the bogie cover of the high-speed railway vehicle of the present invention, the noise absorbing panel is formed by adhesively bonding the porous sound absorbing material and the honeycomb core, and filling the filler in each cell of the honeycomb core. By adopting a honeycomb structure for the absorption panel, its rigidity and strength can be increased, and it is possible to prevent damage to the noise absorption panel, that is, the bogie cover, due to pressure fluctuations when high-speed railway vehicles enter and exit tunnels. It becomes possible to do. Note that the side of the honeycomb core opposite to the side to which the porous sound absorbing material is bonded may be adhesively bonded to the support member, and the rigidity and strength of the carriage cover can be further increased.

  In addition, since the porous sound absorbing material is adhesively bonded to the honeycomb core, the bonded portion is extremely narrow compared to the flange portion of the conventional U-shaped spacing member 109, and the sound absorbing area of the porous sound absorbing material is reduced. Becomes several percent or less, and the sound absorbing characteristics of the porous sound absorbing material can be sufficiently exhibited.

  Furthermore, since the rigidity and strength are enhanced by the honeycomb structure, a porous sound absorbing material and a low strength filler can be obtained by filling each cell of the honeycomb core with a filler made of a foamed resin having excellent sound absorbing characteristics. Can be combined, and the combination can exhibit excellent sound absorption characteristics. In addition, it is possible to exhibit the sound absorption characteristics in a wider frequency band than in the conventional case where the sound absorption characteristics are exhibited by the resonance action of the cavity. Furthermore, the thickness of the noise absorbing panel can be reduced and the weight of the noise absorbing panel can be greatly reduced. In other words, the carriage cover can be prevented from interfering with the carriage, and the carriage cover can be made lightweight, so that the carriage cover can be easily handled when the carriage is maintained and inspected. .

  The bogie cover of the high-speed railway vehicle according to the present invention has, in addition to the above-described configuration, “the noise absorbing panel further includes a plate material bonded to a side opposite to a side of the honeycomb core to which the porous sound absorbing material is bonded. It can also be a “added to the configuration” configuration.

  According to the bogie cover of the high-speed railway vehicle of the present invention, in the noise absorbing panel, the plate material is bonded and bonded to the side opposite to the side to which the porous sound absorbing material of the honeycomb core is bonded, and thereby the rigidity of the noise absorbing panel itself is increased. Strength can be increased.

  The bogie cover of the high-speed railway vehicle according to the present invention has, in addition to the above configuration, “the heating member is a sheet-like covering member made of a heat-resistant resin, and is arranged at a predetermined interval in the covering member and energizes. It is also possible to adopt a configuration in which a fibrous heating element that generates heat and an opening formed so as to penetrate the heating member between the heating elements is also possible. Here, the fibrous heating element is not particularly limited in specific configuration, but examples thereof include carbon fibers, nichrome wires, and the like. Moreover, you may use as any state of a single wire, a twisted wire, or a bundled wire.

  According to the bogie cover of the high-speed railway vehicle of the present invention, the heat generating member has a structure in which fibrous heat generating elements are arranged at predetermined intervals in a sheet-like covering member, and openings are formed between the heat generating elements. With this, it is possible to generate heat by energizing the heating element, and since the heating element is covered with the covering member, it is possible to prevent leakage and the like. When the heating element is made of carbon fiber, the heating member can be made lighter than that of nichrome wire.

  Further, since the heating element is disposed in the sheet-like covering member, the thickness of the heating member can be reduced. Furthermore, since the opening penetrating the heat generating member is provided, noise can be transmitted to the noise absorbing panel disposed on the back surface side of the heat generating member through the opening to enhance the sound absorption characteristics of the carriage cover.

  Furthermore, when the heating elements are connected in parallel with each other, even if a foreign object such as a pebbles collides with the heating member and the heating element is disconnected, the current is maintained by the other heating elements that are not disconnected. Can be maintained, and it is possible to keep preventing snow and ice from adhering.

  In addition to the above-described configuration, the bogie cover of the high-speed railway vehicle according to the present invention may have a configuration in which “the shape of the opening of the heat generating member is a round hole or a long hole shape”.

  According to the carriage cover of the high-speed railway vehicle of the present invention, the shape of the opening formed in the heat generating member is a round hole or a long hole shape, and thereby the opening is formed by an easy means such as a punch or a cutter. Therefore, the opening can be easily formed, and the cost for forming the opening can be kept low.

  In addition to the above-described configuration, the bogie cover of the high-speed railcar according to the present invention has a configuration in which “the noise absorbing panel, the heat generating member, and the surface member are each bonded and bonded with a heat-resistant double-sided adhesive”. You can also

  According to the carriage cover of the high-speed railway vehicle of the present invention, the heat generating member is bonded to the noise absorbing panel and the surface member using the heat-resistant double-sided adhesive, and they can be easily combined. The heat-resistant double-sided adhesive may be in the form of a liquid other than a tape or sheet, and can be appropriately selected.

  In addition to the above-described configuration, the bogie cover of the high-speed railway vehicle according to the present invention has a configuration in which “the noise absorbing panel, the heat generating member, and the surface member are integrally coupled by a bolt / nut or a rivet”. You can also

  According to the bogie cover of the high-speed railway vehicle of the present invention, the noise absorbing panel, the heat generating member, and the surface member are integrally connected by bolts, nuts, or rivets, and they are separated by mechanically connecting them. Can be prevented. In addition, by using together with said heat resistant double-sided adhesive, the reliability of a coupling | bonding can further be improved.

  In addition to the above configuration, the bogie cover of the high-speed railcar according to the present invention is configured as follows: “The heating elements arranged at a predetermined interval in the heating member are connected in parallel to each other, and a set is configured. In addition, a configuration in which each set is connected in series with each other can be adopted.

  According to the bogie cover of the high-speed railway vehicle of the present invention, the heat generating member is configured in such a manner that a plurality of heating elements are connected in parallel to each other to form a set, and these sets are connected in series to each other. It is possible to adjust the power consumption of the heat generating member by adjusting the number of heating elements in one set, and since one set has multiple heating elements, heat is generated when foreign objects such as pebbles collide with each other. Even if the body is disconnected, energization can be maintained by another heating element that is not disconnected, and the function of the heating member can be prevented from stopping.

  In addition to the above configuration, the bogie cover of the high-speed railway vehicle according to the present invention may have a configuration in which “the support member is made of a composite material including carbon fibers as reinforcing fibers”.

  According to the bogie cover of the high-speed railway vehicle of the present invention, the support member is a composite material reinforced with carbon fiber, which makes it possible to make the support member lightweight, high rigidity, and high strength. At the same time, it can be easily molded into various shapes, the cart cover can be easily molded into a three-dimensional curved surface shape, and the cart cover can be prevented from interfering with the cart. In addition, a large press mold is not required, and the cost for manufacturing the carriage cover can be reduced at a low cost. Furthermore, since the support member can be made lighter, it is possible to easily handle the cart cover during maintenance and inspection of the cart.

  As described above, according to the present invention, it is possible to provide a bogie cover for a high-speed railway vehicle that is lightweight and can effectively absorb noise around the bogie and prevent snow and ice from adhering thereto. .

  Hereinafter, a bogie cover for a high-speed railway vehicle, which is the best mode for carrying out the present invention, will be described with reference to FIGS. FIG. 1A is an external perspective view of a railway vehicle provided with a bogie cover for a high-speed railway vehicle of the present invention, FIG. 1B is a cross-sectional view including the bogie cover of the high-speed railway car, and FIG. It is a principal part expanded sectional view of the bogie cover of a vehicle. 2 is an exploded cross-sectional view of the bogie cover of the high-speed rail vehicle of the present invention, FIG. 3 is an exploded perspective view of the bogie cover in FIG. 2, and FIG. 4 (A) is the high-speed rail vehicle of the present invention. FIG. 5 is a plan view schematically showing a heat generating member in the bogie cover, FIG. 5B is an enlarged plan view showing a part of the heat generating member, and FIG. 5 shows the frequency and sound absorption coefficient of the bogie cover of the high-speed railway vehicle of the present invention. Is a graph showing the relationship in comparison with the conventional one.

  As shown in FIG. 1 (A), the lower body 2 of the high-speed railway vehicle 1 is provided with a cover 3 that is formed in a three-dimensional curved surface that covers the periphery of the carriage 4 together with a cover 3 that covers an underfloor device (not shown). (See FIG. 1B). The carriage cover 5 absorbs noise generated around the carriage 4 and can also absorb noise reflected from the soundproof wall. Further, the cart cover 5 is provided with a heat generating member to be described later, and it is possible to prevent snow and ice from adhering to the cart cover 5.

  As shown in FIG. 1C in an enlarged manner, the carriage cover 5 includes a support member 7 having concave portions 6 of a predetermined shape on both surfaces thereof, a noise absorbing panel 8 attached to the concave portion 6 of the support member 7, The sheet-like heat generating member 9 disposed on the surface side of the noise absorbing panel 8 and the surface member 10 disposed further on the surface side of the heat generating member 9 are configured. In this example, the heat generating member 9 is bonded and bonded to the noise absorbing panel 8 and the surface member 10 with a heat-resistant double-sided adhesive 11 as shown in FIG.

  2 and 3, the support member 7 of the carriage cover 5 includes a peripheral frame portion 13 that is formed in a frame shape by arranging a frame member 12 having a rectangular cross section on the peripheral portion of the carriage cover 5. A plate-like portion 14 provided to close the opening formed by the peripheral frame portion 13 and provided at a substantially intermediate portion in the thickness direction of the carriage cover 5; and a frame member 12 made of a foamed resin such as polyetherimide. It is comprised from the core material 15 with which it fills inside, and the flange part 16 provided in the outer periphery of the peripheral frame part 13. As shown in FIG.

  The support member 7 is made of a composite material in which the peripheral frame portion 13, the plate-like portion 14, and the flange portion 16 excluding the core material 15 are made of carbon fiber as a reinforcing fiber, and is manufactured by a known method. It has rigidity and strength and is extremely light compared to aluminum alloy.

  The support member 7 has a recess 6 having a predetermined shape formed by the peripheral frame portion 13 and the plate-like portion 14, and the recess 6 is formed on both sides of the plate-like portion 14. The support member 7 is formed in a three-dimensional curved surface shape so that the carriage 4 does not interfere with the carriage cover 5.

  The noise absorbing panel 8 has a porous sound absorbing material 17 in which short fibers made of metal or nonmetal are formed in a mat shape, and adhesively bonded to one surface of the porous sound absorbing material 17, and after ceramic fibers are formed into a honeycomb shape. Adhesive bonding to the honeycomb core 18 formed by impregnating the non-combustible resin, the filler 19 made of foamed resin filling the honeycomb core 18, and the surface of the honeycomb core 18 opposite to the porous sound absorbing material 17. And is formed in advance so as to follow the three-dimensional curved surface shape of the support member 7, and has an outer shape that can be inserted into the recess 6 of the support member 7. In addition, the honeycomb core 18 is mainly composed of ceramic fibers, thereby improving flame retardancy and impregnating with a non-flammable resin to suppress moisture absorption. Further, the plate member 20 is not essential, and the honeycomb core of the noise absorbing panel 8 may be bonded and bonded directly to the support member 7 instead of the plate member 20.

  The noise absorbing panel 8 can effectively absorb noise incident from the porous sound absorbing material 17 side. The noise absorbing panels 8 attached to both surfaces of the support member 7 are respectively porous sound absorbing materials. The direction is directed so that the 17 side is in the direction in which noise is incident, that is, the plate 20 side of the noise absorbing panel 8 is in contact with the plate-like portion 14 of the support member 7. The noise absorbing panel 8 has a thickness of about 30 mm, and is thinner and lighter than a conventional sound absorbing panel.

  As shown in FIG. 4, the heating member 9 includes a sheet-like covering member 21 made of a heat-resistant resin, a heating element 22 made of carbon fibers arranged at a predetermined interval in the covering member 21, and each heating element 22. An opening 23 formed so as to penetrate the heat generating member 9 is provided. In this example, the shape of the opening of the heat generating member is a long hole shape.

  Further, as shown in FIG. 4B, the heating member 9 includes an insulating holding fiber 24 for holding the heating element 22 at a predetermined interval, and a conductive feeding fiber for supplying power to the heating element 22. 25, for example, in the cloth woven by the holding fiber 24, weaving the heating element 22 as a weft at a predetermined interval and weaving the feeding fiber 25 as a warp at both ends of the heating element 22 Electric power is supplied to the heating element 22 through the fiber 25.

  The heat generating member 8 has a heat resistant resin sheet disposed on both sides of a cloth woven by the heat generating element 22, the holding fiber 24, and the power feeding fiber 25, and the two heat resistant resin sheets are fused or bonded to each other. It is thin and lightweight.

  In this example, the surface member 10 is substantially the same as the porous sound absorbing material 17 in the noise absorbing panel 8, and is formed by forming short fibers made of metal or nonmetal in a mat shape, and has sound absorption characteristics. It has become. In addition, the heat-resistant double-sided adhesive 11 is formed in a tape shape in this example, and is pasted so as to avoid the opening 23 of the heat generating member 9. It is attached. In addition, it is desirable to stick the heat-resistant double-sided adhesive 11 in a direction perpendicular to the fiber direction of the heating element 22 in the heating member 9, thereby suppressing deterioration due to heat from the heating element 22. .

  As shown in FIGS. 1B and 3, the bogie cover 5 of the present embodiment is disposed on the vehicle body lower portion 2 of the high-speed railway vehicle 1 via a plurality of hinge members 26 inside the upper edge portion of the support member 7. It is attached and is pivotally supported so that it can be opened and closed with respect to the vehicle body. The carriage cover 5 is extremely lightweight, and can be easily opened upward as indicated by a two-dot chain line in the drawing when the carriage 4 is maintained and inspected, and the carriage cover 5 is opened by a latch mechanism (not shown). Is to be maintained.

  Next, FIG. 5 is a graph showing the relationship between the frequency and the sound absorption coefficient in the bogie cover 5 of the high-speed railway vehicle of this embodiment. It can be seen that the sound absorption coefficient of the cart cover 5 of this example shows a high sound absorption coefficient in a wide frequency band, as indicated by a solid line. In particular, in a frequency band between 500 and 4000 Hz, a high sound absorption coefficient of 0.7 or more is shown. On the other hand, the conventional sound absorbing panel indicated by a broken line in the figure exhibits a high sound absorption coefficient only within a narrow range of 800 to 2000 Hz, and it can be seen how excellent the product of the present invention is.

  Then, the effect | action of the trolley | bogie cover 5 of the high-speed rail vehicle of this embodiment is demonstrated. The carriage cover 5 is formed of a composite material whose support member 7 is made of carbon fiber as a reinforcing fiber, and has sufficient rigidity and strength as a carriage cover for a high-speed railway vehicle. And the noise absorption panel 8 is each mounted | worn in the recessed part 6 formed in both surfaces of the supporting member 7. As shown in FIG. The noise absorbing panel 8 has a honeycomb structure, and includes a porous sound absorbing material 17 on the surface side thereof, and a filler 19 made of a foamed resin having excellent sound absorbing characteristics in the cells of the honeycomb core 18. For this reason, the noise absorbing panel 8 has light weight and excellent sound absorption characteristics, and has sufficient rigidity and strength as a bogie cover for a high-speed railway vehicle. Further, in this cart cover 5, a surface member 10 having excellent sound absorption characteristics is disposed through a sheet-like heat generating member 9 having an opening 23 on the surface side of the noise absorbing panel 8, and these are integrally coupled. .

  When noise generated from the periphery of the carriage 4 is incident on the carriage cover 5, specifically, when the noise is incident on the surface member 10, the noise is absorbed to some extent by the surface member 10, and the noise that has not been absorbed is the opening of the heating member 9. 23 enters the noise absorbing panel 8 and is absorbed by the porous sound absorbing material 17 and the filler 19 of the noise absorbing panel 8, and the noise level becomes a predetermined value or less.

  On the other hand, the truck cover 5 is also provided with a noise absorbing panel 8 on the outside of the vehicle body. The outside noise absorbing panel 8 provides aerodynamic noise of the vehicle body, noise from around the pantograph, and along the track. It absorbs the reflected sound from the soundproof wall 113 and the like, and contributes to reducing the noise of the entire high-speed railway vehicle 1.

  In the noise absorbing panel 8 outside the carriage cover 5, the outer periphery of the porous sound absorbing material 17 is further extended than the honeycomb core 18 and the like, and is configured to cover the peripheral frame portion 13 of the support member 7. The effective area for exhibiting the sound absorption characteristics of the carriage cover 5 is widened. The porous sound absorbing material 17 may be extended so as to cover the entire support member 17.

  Further, the cart cover 5 is provided with a heat generating member 9, which is heated by energizing the heat generating member 9 to prevent snow or ice from adhering to the cart cover 5, or the adhering snow or ice. Can be melted.

  Thus, according to the bogie cover 5 of the high-speed railway vehicle 1 of the present embodiment, the noise absorbing panel 8 is mounted in the concave portion 6 of the support member 7, and the surface member 10 is placed thereon via the sheet-like heating member 9. Since they are disposed and are integrally coupled, the noise around the carriage 4 can be effectively absorbed by the surface member 10 and the noise absorbing panel 8.

  Further, by causing the heat generating member 9 to generate heat, it is possible to prevent snow and ice from adhering to the cart cover 5, and the surface member 10 is disposed on the surface side of the heat generating member 9. It is possible to prevent the heat generating member 9 from being damaged due to a foreign object such as pebbles directly colliding.

  Further, since the noise absorbing panel 8 has high heat insulating properties, the heat generated from the heat generating member 9 is not absorbed by the noise absorbing panel 8, and the heat from the heat generating member 9 is efficiently transmitted to the surface member 10 side. Thus, the thermal efficiency can be increased and the power consumption of the heat generating member 9 can be kept low.

  Furthermore, since each heat generating member 22 is connected to each other in parallel by the feeding fiber 25, the heat generating member 9 is not disconnected even if a foreign object such as a pebbles collides with the heat generating member 9 and the heat generating member 22 is disconnected. Since energization is maintained by the other heating element 22, the operation of the heating member 9 can be maintained, and it is possible to continue to prevent snow and ice from adhering.

  Moreover, the noise absorption panel 8 having a honeycomb structure can increase the rigidity and strength thereof, and the noise absorption panel 8, that is, the carriage cover 5 is caused by the pressure fluctuation when the high-speed railway vehicle 1 enters and exits a tunnel or the like. It can be prevented from being damaged.

  Further, since the porous sound absorbing material 17 is bonded to the honeycomb core 18, the bonded portion is extremely thin, and the reduction of the sound absorbing area of the porous sound absorbing material 17 is several percent or less, and the sound absorbing characteristics of the porous sound absorbing material 17 are reduced. Can be fully exhibited.

  Further, the cart cover 5 of the present embodiment exhibits high sound absorption characteristics in a wider frequency band than the conventional sound absorbing panel, and the thickness of the cart cover 5 can be reduced. It is possible to avoid the carriage cover from interfering with the carriage.

  Furthermore, the support member 7 is made of a composite material reinforced with carbon fiber. The support member 7 can be lightweight, high rigidity and high strength, and can be easily formed into various shapes. Thus, the cart cover 5 can be easily formed into a three-dimensional curved surface shape, and the cart cover 5 can be prevented from interfering with the cart 4. In addition, a large press mold is not required, and the cost for manufacturing the carriage cover 5 can be reduced at a low cost. Furthermore, since the support member 7 can be made lightweight, the cart cover 5 can be easily handled during maintenance and inspection of the cart 4.

  The present invention has been described with reference to preferred embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention as described below. And design changes are possible.

  That is, in the bogie cover 5 of the high-speed railway vehicle 1 in the above embodiment, the shape of the opening 23 of the heat generating member 9 is a long hole shape, but is not limited to this, for example, FIG. A round hole shape as shown in the figure may be used, and even in this case, the opening 23 can be easily formed and the cost for the formation can be kept low.

  Further, although the connection of the heating elements 22 of the heating member 9 in the carriage cover 5 of the high-speed rail vehicle 1 of the present embodiment is shown as being all connected in parallel, the present invention is not limited to this. For example, FIG. As shown in FIG. 4, a plurality of heating elements 22 may be connected in parallel to each other to form a set, and these sets may be connected in series to each other, thereby reducing the number of heating elements 22 in one set. By adjusting, it becomes possible to adjust the power consumption of the heat generating member 9, and since one set includes a plurality of heat generating elements 22, foreign objects such as pebbles collide and the heat generating element 22 is disconnected. However, energization can be maintained by another heating element 22 that is not disconnected, and the function of the heating member 9 can be prevented from stopping.

  Furthermore, although the bogie cover 5 of the high-speed railway vehicle 1 according to the present embodiment is shown with the noise absorbing panels 8 on both sides thereof, the present invention is not limited to this, and the noise is applied to only one of the bogie covers 5. For example, as shown in FIG. 8, the noise absorbing panel 8 may be provided only inside the vehicle body of the cart cover 5, that is, only on the cart 4 side. As a result, the weight of the carriage cover 5 can be further reduced as compared with the case where the noise absorbing panels 8 are provided on both sides, so that the carriage cover 5 can be easily handled when the carriage 4 is maintained and inspected. It becomes.

  Moreover, in the cart cover 5 of the high-speed railway vehicle 1 of the present embodiment, the heating member 9 is provided only on the cart 4 side of the cart cover 5, but the invention is not limited to this. The heat generating member 9 may be provided to prevent the snow and ice from adhering to the outside of the carriage cover 5.

  Furthermore, in the bogie cover 5 of the high-speed railway vehicle 1 according to the present embodiment, the heat generating member 9 is coupled to the noise absorbing panel 8 and the surface member 10 using the heat-resistant double-sided tape 11, but the present invention is limited to this. Instead, for example, instead of the heat-resistant double-sided tape 11, it may be integrally coupled with a bolt, nut, rivet or the like. Further, the heat-resistant double-sided tape 11 and a bolt, nut, rivet or the like are used in combination. May be combined. Thereby, the reliability of coupling | bonding can further be improved.

  Moreover, in the bogie cover 5 of the high-speed railway vehicle 1 of the present embodiment, the noise absorbing panel 8 provided with the plate material 20 is shown, but the present invention is not limited to this, and the noise absorbing panel without the plate material 20 is provided. As a result, the cost of the carriage cover 5 can be reduced by the amount of the plate material 20 and the weight thereof can be reduced. Note that, instead of the plate member 20, the honeycomb core 18 may be directly bonded to the support member 7 so that the carriage cover 5 and the noise absorbing panel are integrated, or they may be separately attached to the support member 7. good.

(A) is an external perspective view of the railway vehicle provided with the bogie cover of the high-speed railway vehicle of the present invention, (B) is a cross-sectional view including the bogie cover of the high-speed railway vehicle, and (C) is a view of the high-speed railway vehicle. It is a principal part expanded sectional view of a trolley | bogie cover. It is sectional drawing which decomposes | disassembles and shows the trolley | bogie cover of the high-speed rail vehicle of this invention. It is a disassembled perspective view of the trolley | bogie cover in FIG. (A) is a top view which shows roughly the heat generating member in the trolley | bogie cover of the high-speed rail vehicle of this invention, (B) is an enlarged plan view which shows a part of heat generating member. It is a graph which shows the relationship between the frequency of the trolley | bogie cover of the high-speed railcar of this invention, and a sound absorption rate compared with the conventional one. FIG. 5 is a partially enlarged plan view showing a heat generating member in a form different from that in FIG. 4. It is a top view which shows roughly the other form of the connection of a heat generating member. It is sectional drawing which shows other embodiment of the trolley | bogie cover of the high-speed rail vehicle of this invention. (A) is explanatory drawing which shows the problem of the noise in the conventional railway vehicle, (B) is sectional drawing which shows the conventional sound absorption panel. It is a figure which shows the state which snowed around the trolley | bogie in the conventional high-speed rail vehicle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 High-speed railcar 2 Lower body part 3 Cover 4 Car 5 Car cover 6 Recess 7 Support member 8 Noise absorbing panel 9 Heat generating member 10 Surface member 11 Heat-resistant double-sided adhesive 17 Porous sound absorbing material 18 Honeycomb core 19 Filler 20 Plate material 21 Covering Member 22 Heating element 23 Opening

Claims (9)

A support member having a recess of a predetermined shape;
A noise absorbing panel mounted in the recess of the support member;
A sheet-like heat generating member disposed on the surface side of the noise absorbing panel;
A surface member disposed on the surface side of the heat generating member and capable of absorbing or transmitting sound;
A bogie cover for a high-speed railway vehicle, wherein the support member, the noise absorbing panel, the heat generating member, and the surface member are coupled to each other. The noise absorbing panel is
A porous sound-absorbing material arranged on the surface side and formed of short fibers in a mat shape;
A honeycomb core bonded to one surface of the porous sound absorbing material;
2. The bogie cover for a high-speed railway vehicle according to claim 1, wherein each of the cells of the honeycomb core is filled with a filler made of foamed resin. The noise absorbing panel is
The bogie cover for a high-speed railway vehicle according to claim 2, further comprising a plate material bonded to the opposite side of the honeycomb core to the side to which the porous sound absorbing material is bonded. The heating member is
A sheet-like covering member made of a heat-resistant resin;
A fibrous heating element that is arranged in the covering member at predetermined intervals and generates heat when energized;
4. The bogie for a high-speed railway vehicle according to any one of claims 1 to 3, further comprising an opening formed so as to penetrate the heating member between the heating elements. cover.   The bogie cover for a high-speed railway vehicle according to claim 4, wherein the shape of the opening of the heat generating member is a round hole or a long hole shape.   The high-speed railway according to any one of claims 1 to 5, wherein the noise absorbing panel, the heat generating member, and the surface member are each bonded and bonded with a heat-resistant double-sided adhesive. Vehicle trolley cover.   The high-speed rail vehicle according to any one of claims 1 to 6, wherein the noise absorbing panel, the heat generating member, and the surface member are integrally coupled by a bolt, a nut, or a rivet. Trolley cover. The heating elements arranged at predetermined intervals in the heating member are:
The high-speed rail vehicle according to any one of claims 4 to 7, wherein a plurality of wires are connected in parallel to each other to form a set, and each set is connected to each other in series. Dolly cover.   The bogie cover for a high-speed railway vehicle according to any one of claims 1 to 8, wherein the support member is made of a composite material including carbon fibers as reinforcing fibers.

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