JP2005137046A - Sound-proof sidewall of current collector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize a sound-proof sidewall of a current collector of a vehicle which can deal with further speed acceleration with a light weight without impairing a sound insulation property at a low cost. <P>SOLUTION: The sound-proof sidewalls of the current collector stand at both sides of the current collector installed on the roof 1a of the vehicle 1, have a shape standing in a wing shape from the roof 1a, and surface plates 11, 12 arranged on the front and rear surfaces coupled through the honeycomb core 13 interposed between the surfaces plates 12 and 13. Furthermore, inner and outer plate materials and the honeycomb core material are composed of a light weight structure material including an aluminum or a carbon fiber-reinforced plastic. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a soundproof side wall of a current collector in a vehicle, and more particularly, to a soundproof side wall of a current collector in a vehicle suitable for reducing noise generated from a current collector of a high-speed railway vehicle such as a Shinkansen vehicle, a so-called pantograph. Is.

  2. Description of the Related Art Conventionally, a windshield cover that surrounds a current collector has been provided in order to reduce the noise by regulating the airflow that hits the current collector on the roof of the vehicle (see, for example, Patent Documents 1 and 2).

  In Patent Literature 1, a slope portion where the final portion rises gently toward the current collector before and after the current traveling direction of the current collector in the vehicle traveling direction, and an installation area of the current collector between these slope portions is provided. There is described a windshield cover device for a current collector that has a remaining cavity portion and reduces noise during vehicle travel. In particular, as an improved invention for a windshield cover described as a conventional one having a rectangular cross section, almost the entire outer surface of the windshield cover is a continuous curved surface and is cut in a direction perpendicular to the vehicle traveling direction. It discloses that the area continuously increases from the rising start edge of the slope toward the hull position, and the change graph of the cross-sectional area along the vehicle traveling direction includes about one third of the straight line region.

  Patent Document 2 discloses a conventional windshield cover of the type described in Patent Document 1 that reduces cavity noise caused by negative pressure and airflow turbulence generated in a concave portion that forms a current collector installation area, a so-called cavity portion. An improved invention is disclosed. This occurs by providing soundproof side walls on both sides of the cavity part while suppressing the generation of the cavity sound itself by the ventilation function while restricting the action of the opposed air flow to the current collector with the slope part as a mesh structure It is possible to reduce the leakage of the cavity sound into the surrounding area. Even in the windproof cover disclosed in Patent Document 1, since a cavity sound is generated, it is preferable to use a soundproof side wall in combination. The soundproof side wall is easily formed into a thin streamline shape having a small air resistance with respect to the opposed airflow as compared with the windshield cover of the current collector.

  By the way, a so-called mass law is known as a relational expression regarding sound insulation. This is because the transmission loss TL of a wall body is approximately proportional to the product of the mass M per unit area of the wall body and the frequency f of the sound. The larger the mass per unit area, or the higher the frequency. It means that the sound transmission loss is large and the sound insulation effect is high. The higher the hollowness is, the smaller the number of intermediate walls is, the larger the sound insulation is. In addition, the soundproof side wall is higher than the windshield cover and stands up straight from the roof of the vehicle, and because it rises almost straight, it can easily be swung from side to side due to pressure fluctuations such as passing trains, tunnel entry, and crosswinds. Sufficient mounting strength and torsional rigidity are also required.

Therefore, conventionally, with respect to the soundproof side wall a having a side shape as shown in FIG. 9 (a), the front and rear shape as viewed from the traveling direction of the vehicle has a narrow upper end a2 as shown in FIG. 9 (b). A delta shape having a relatively large thickness is obtained as a wing shape that continuously increases toward the wide attachment base a1 so as to obtain both attachment strength, ring rigidity, and appropriate sound insulation characteristics. As a specific structure, a thick aluminum mounting base g is arranged on the base a1 to secure the mounting strength to the vehicle roof b through the mounting bracket h, and the inside and outside of the mounting base g are secured. Cover the lower end of the hollow structural part a3 reinforced by a number of aluminum bones e and f that run vertically and horizontally on the face plates c and d, and join the lower end of the vertical bone e to the mounting base g by welding or the like. As a result, the necessary strength and sound insulation are ensured. Further, the hem portions of the inner and outer face plates c and d extend to the roof b of the vehicle and surround the mounting base g, satisfying the rising shape of the soundproof side wall a from the roof b.
JP-A-10-126903 JP 2003-219505 A

  However, in the soundproof side wall a having the delta shape having the reinforcing structure by the bones e and f running vertically and horizontally as described above, a large number of bones e and f are required as shown in FIG. The facing bone e needs to have the same size and shape as the delta-shaped space formed between the inner and outer face plates c and d, and the weight of the bones e and f, particularly the weight of the longitudinal bone e, is greatly affected. Now that the soundproof side wall a is quite heavy and the traveling speed is going to exceed 300 km, further weight reduction is required.

  A large number of bones e and f must be welded together and welded individually to the inner and outer face plates c and d, and the longitudinal bone e must be welded to the mounting base g individually. Don't be. Moreover, in order to simplify the structure and assembling work by passing the transverse bone f as a continuous material with respect to the longitudinal bone e, a cut portion through which the transverse bone f passes through the longitudinal bone e is formed. It is also necessary to fit them together. For these reasons, the conventional soundproof side wall a is expensive.

  An object of the present invention is to provide a soundproof side wall of a current collector that is lightweight and can cope with further speedup without impairing sound insulation.

  In order to achieve the above-described problem, the soundproof side wall of the current collector of the present invention is a soundproof side wall of the current collector installed upright on both sides of the current collector installed on the roof of the vehicle, One feature is that it has a shape that rises like a wing from the roof of a vehicle and is joined via a honeycomb core sandwiched between face plates arranged on the front and back sides.

  In such a configuration, even if the honeycomb core is formed of a thin material, the thickness direction buckling and tensile strength and bending rigidity are high, and the attachment strength, bending rigidity and bending rigidity are improved, and the inner and outer face plates are joined. The location and density thereof are remarkably high, the surface rigidity of the face plate is increased, and vibration and resonance characteristics can be suppressed, so that sound insulation is improved. Moreover, the honeycomb core can be bonded with a simple structure between the face plates as a core material having a size corresponding to the bonding region of the inner and outer face plates.

  The soundproof side wall of the current collector of the present invention is a soundproof side wall of the current collector installed upright on both sides of the current collector installed on the roof of the vehicle, and has a shape that rises in a wing shape from the roof of the vehicle. A honeycomb core made of lightweight structural material such as aluminum and carbon fiber reinforced plastics, which has inner and outer plates made of lightweight structural materials such as aluminum and carbon fiber reinforced plastics sandwiched between them. Another feature is that they are connected via a material.

  In such a configuration, the honeycomb core is made of a thin-walled material and is light in weight while using lightweight structural materials such as lightweight aluminum and carbon fiber reinforced plastic. Bending and pulling strength is high, mounting strength, bending rigidity and torsional rigidity are improved, and the joint location of the inner and outer face plates and its density are remarkably high, and the face plate rigidity is increased, resulting in vibration characteristics and resonance characteristics. Since it is suppressed, the sound insulation is improved. Moreover, the honeycomb core can be bonded with a simple structure between the face plates as a core material having a size corresponding to the bonding region of the inner and outer face plates.

In a further configuration wherein the bond is by brazing, bonding, or diffusion, softening, welding with melting, welding,
The honeycomb core and the inner and outer face plates are joined to at least one of the joints of each other by brazing or bonding the entire face plate area with a brazing material or adhesive that is applied, fused, or sandwiched, or bonded together. The entire face plate area can be joined together at once or sequentially depending on diffusion and softening due to friction, vibration, electrical resistance, welding, welding with melting, and welding environment.

In a further configuration, the inner and outer face plates are connected between the upper edges by a frame frame made of a profile, and the lower edges are connected by a fixed frame made of a profile and having a fixing portion to the roof side of the vehicle.
By the cross-sectional shape of the profile connecting the upper and lower edges of the inner and outer face plates, the peripheral shape of the soundproof side wall can be obtained satisfying the continuous continuity with the inner and outer face plates. Increases mechanical strength. Moreover, an attachment portion to the roof of the vehicle is also provided with the connection by a fixed frame.

In the further configuration, the shape material is a hollow material made of lightweight structural materials such as aluminum-based, carbon fiber reinforced plastics,
Higher bending rigidity, mechanical strength, bonding strength, and mounting strength can be satisfied with a lighter material and box structure.

In a further configuration, the frame frame and the fixed frame have a connecting portion that connects the upper and lower edges of the inner and outer face plates with the same distance between them.
The inner and outer face plates connected between the upper edge and the lower edge by the frame frame and the fixed frame can be in a parallel state with a space that is uniquely determined on each frame side, and a simple and uniform thickness. The honeycomb cores can be connected to each other.

The fixed frame has a hollow portion that has a width larger than that below the connecting portion, and the bottom of the hollow portion forms a horizontal mounting seat on the roof, and its own connecting portion has a predetermined angle with respect to the mounting seat. In a further configuration, having a mounting angle to attach the faceplate to
The fixed frame connects the lower edges of the inner and outer face plates at the connecting portion, but has a hollow portion that is wider than the lower portion of the connecting portion, and the bottom portion of the fixing frame is attached to the roof. By ensuring that the mounting width to the roof and the rigidity of the roof with a large width of the hollow portion, the face plate area extending upward from the connecting portion is connected with a connecting portion having a smaller width than the hollow portion, The structure and shape can be slimmed down without making the structure particularly complicated, and the honeycomb core does not impair the required bending rigidity and bending rigidity. In addition, since the mounting seat of the hollow part is horizontal, if the fixed frame is attached to the roof so as to keep the mounting seat horizontal, it is possible to easily ensure a predetermined standing posture without being affected by the curvature of the roof. And the rising angle of the face plate area connected by the connecting portion set at a predetermined angle with respect to the mounting seat becomes appropriate.

The fixed frame is provided with a mounting hole for the roof in the longitudinal direction at the bottom of the hollow part, and a window is provided between the mounting holes to form a bridge for attaching the window to the roof. In the further configuration, the wall is provided with a working window corresponding to the mounting part,
In addition to the provision of a partial bridge section for mounting in the longitudinal direction of the bottom of the hollow section to ensure the mounting strength to the roof of the vehicle, further weight reduction by the amount of windows provided between each mounting section With the work window provided corresponding to each attachment part of the inner wall of the hollow part, the work window can be easily attached to the roof while the work window is provided. Weight can be reduced.

The inner wall of the hollow portion is attached so as to be detachable so as to cover the surface having the work window, and has a cover member that extends to the roof surface of the vehicle at the attachment position of the fixed frame to the vehicle roof. In a further configuration,
When the surface of the hollow part with the work window is exposed, it can be avoided by covering the cover window with a cover member that causes the work window part to increase aerodynamic resistance or generate aerodynamic noise. Since the member extends to the roof surface at the position where the fixed frame is attached to the roof, it is possible to form a surface where the soundproof side wall rises from the roof without a gap.

In a further configuration, the outer wall of the hollow portion has a skirt wall that extends to the roof surface of the vehicle at a location where the fixed frame is attached to the roof of the vehicle.
The skirt wall that extends downward from the bottom of the hollow portion on the outer wall of the hollow portion extends to the roof surface at the position where the fixed frame is attached to the roof. The skirt wall can form a surface in which the soundproof side wall stands up from the roof without a gap without being affected by the lower height of the wall position outside the wall position.

The frame frame and the fixed frame have a coupling end in which the end portions of the frame frame and the fixed frame are joined together to form a main body that holds the face plate and the honeycomb core material between the frame frame and the fixed frame. In a further configuration, a sheet metal working member forming a side wall surface extending from the coupling end to the roof surface of the vehicle in a state flush with the main body portion at the mounting position is connected to the coupling end.
The frame frame and the fixed frame are joined together with their ends aligned to form a closed annular frame that connects the inner and outer face plates between the upper and lower edges. Since the entire circumference is connected and supported with high bending rigidity and mechanical strength, both the connection strength between the face plate area and the fixed frame side and the rolling rigidity are increased. Further, a side wall surface extending from the joint end to the vehicle roof surface in a state where the sheet metal working member is connected to the joint end and the fixed frame is attached to the vehicle roof. Therefore, the fish fin-like rising shape at both ends of the soundproof side wall can be easily formed into any shape without the influence of the use of the frame frame and the fixed frame.

In a further configuration, the cover member is made of a lightweight structural material such as aluminum-based, carbon fiber reinforced plastics,
The cover member is easy to be fully supported by being attached to the inner wall of the hollow portion, and can be made thin as much as that, and is a lightweight structural material such as aluminum-based or carbon fiber reinforced plastics. As a result, the weight can be further reduced without reducing the overall mechanical strength, bending rigidity, and bending rigidity.

  Further objects and features of the present invention will become apparent from the following detailed description and drawings. Each feature of the present invention can be used alone or in combination in various combinations as much as possible.

  According to one characteristic of the soundproof side wall of the current collector of the present invention, the mounting strength, the bending rigidity and the turning rigidity are improved, the surface rigidity of the face plate is increased, the vibration characteristics and the resonance characteristics are suppressed, and the sound insulation is improved. Therefore, it is possible to further reduce the weight by reducing the thickness of each part, which is suitable for further speeding up of the vehicle. In addition, the structure is simple and the cost can be reduced.

  According to another feature of the soundproof side wall of the current collector of the present invention, the mounting strength, the bending rigidity, the bending rigidity are improved, and the surface rigidity of the face plate is increased while reducing the weight by using a lightweight structural material as a whole. Therefore, vibration characteristics and resonance characteristics are suppressed, and sound insulation is improved, so that each part can be slimmed down to further reduce the weight, which is preferable for further speeding up of the vehicle. In addition, the structure is simple and the cost can be reduced.

According to a further configuration, wherein the connection is by brazing, bonding, or diffusion, softening, welding with melting, welding,
The entire face plate area can be joined by brazing or bonding at once, or the entire face plate area can be joined by welding or welding in succession or sequentially.

According to a further configuration, the inner and outer face plates are connected between the upper edges by a frame frame made of a shape material, and the lower edges are connected by a fixed frame made of a shape material and having a fixing portion to the roof side of the vehicle. ,
By connecting the upper and lower edges of the inner and outer faceplates with the shape material, the bending rigidity and mechanical strength of the soundproof side wall periphery are increased while obtaining a continuous peripheral state with the inner and outer faceplates of the soundproof side wall, and the roof of the vehicle is secured by a fixed frame. A mounting portion can be provided.

According to a further configuration, the profile is a hollow material made of a lightweight structural material such as aluminum-based, carbon fiber reinforced plastics,
Higher bending rigidity, mechanical strength, bond strength, and mounting strength can be satisfied with a lighter material and structure.

According to a further configuration, the frame frame and the fixed frame have a connecting portion that connects the upper edge and the lower edge of the inner and outer face plates while maintaining the same distance between them.
The inner and outer face plates can be connected to each other in a parallel state having a uniquely determined interval on each frame side, and can be connected to each other by a simple honeycomb core having a uniform thickness.

The fixed frame has a hollow portion that has a width larger than that below the connecting portion, and the bottom of the hollow portion forms a horizontal mounting seat on the roof, and its own connecting portion has a predetermined angle with respect to the mounting seat. According to a further configuration having a mounting angle to attach the faceplate to
While securing the mounting strength to the roof and the rigidity of the roof at the hollow part, the thickness between the inner and outer surfaces is small enough to match the width of the connecting part, and the structure and shape are slimmed down without complicating the structure and weight. Cost reduction can be achieved. In addition, the bending rigidity and bending rigidity are not impaired by the honeycomb core. Moreover, it can be easily installed without being influenced by the curvature of the roof and installed in an appropriate rising posture, and the rising angle of the face plate area connected by the connecting portion is also appropriate.

The fixed frame is provided with a mounting hole for the roof in the longitudinal direction at the bottom of the hollow part, and a window is provided between the mounting holes to form a bridge for attaching the window to the roof. According to a further configuration, the wall is provided with a working window corresponding to the mounting part,
In the hollow part, while securing the attachment strength to the roof of the vehicle by the partial bridge part arranged in the longitudinal direction, the weight between the attachment parts is reduced, and the attachment work by each attachment part is While it is easy with the corresponding work window, the work window can be reduced in weight.

The inner wall of the hollow portion is attached so as to be detachable so as to cover the surface having the work window, and has a cover member that extends to the roof surface of the vehicle at the attachment position of the fixed frame to the vehicle roof. According to a further configuration,
With the cover member, it is possible to form a surface where the soundproof side wall stands up from the roof without any gap while avoiding the work window from increasing aerodynamic resistance or generating aerodynamic noise.

According to a further configuration, the outer wall of the hollow portion has a skirt wall that extends to the roof surface of the vehicle at a position where the fixed frame is attached to the roof of the vehicle.
The skirt wall extending downward from the outer wall of the hollow portion can form a surface in which the soundproof side wall stands up from the roof without a gap without being affected by the curve of the roof surface.

The frame frame and the fixed frame have a coupling end in which the end portions of the frame frame and the fixed frame are joined together to form a main body that holds the face plate and the honeycomb core material between the frame frame and the fixed frame. According to a further configuration, a sheet metal working member that forms a side wall surface extending from the coupling end to the roof surface of the vehicle in a state flush with the main body at the attachment position is connected to the coupling end. ,
By connecting and supporting the entire circumference of the inner and outer face plates by forming an annular frame in which the frame frame and the fixed frame are closed, each part is slimmed to the extent that both the connection strength with the fixed frame side and the rigidity of the face plate area increase. Further weight reduction and cost reduction can be achieved. Moreover, the fish fin-like rising shape at both ends of the soundproof side wall can be easily formed into any shape without the influence of the frame frame and the fixed frame by the sheet metal processing member.

According to a further configuration, the cover member is made of a lightweight structure material including aluminum-based, carbon fiber reinforced plastics,
The cover member can be made thin, and by being a lightweight structural material, further weight reduction can be achieved without reducing the overall mechanical strength, bending rigidity, and turning rigidity.

  BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a best mode for soundproof side walls of a current collector in a vehicle according to the present invention will be described in detail with reference to FIGS. This embodiment is an example of a soundproof side wall 3 corresponding to a current collector 2 for a railway vehicle, particularly a Shinkansen vehicle 1 as shown in FIG. 1, and is provided on both sides of the windshield cover 4 of the current collector 2. is there. The windshield cover 4 reduces the generation of aerodynamic resistance and aerodynamic noise caused by the opposing airflow with respect to the current collector 2, and reduces the variation in lift by stabilizing the opposing airflow toward the boat body 5. However, when the opposite airflow passes over the cavity 6 where the current collector 2 is installed in the windshield cover 4, so-called cavity sound is generated due to the collision due to entering the cavity 6, turbulence of the airflow, generation of eddy current, etc. To do. If the cavity sound does not have the side wall 7 as shown in FIG. 1, the cavity sound is not limited to the height limit for taking the insulation distance from the boat body 5 even if the side wall 7 is present, the notch 8, etc. It becomes a noise source to the side. In addition, generation of aerodynamic sound by the windshield cover itself is part of the noise source. Further, as the vehicle 1 is further increased in speed, the sliding sound of the boat body 5 with respect to the overhead line becomes a noise source that needs to be blocked.

  The soundproof side wall 3 of the present embodiment has a shape that rises like a wing from the roof 1a of the vehicle 1 as shown in FIG. 11, 12 are sandwiched between them, and have a basic structure coupled through a honeycomb core 13 as illustrated in FIGS. 3, 4, and 5 (a). Even if the honeycomb core 13 is formed of a thin material, it has a high buckling and tensile strength in the thickness direction and a high bending rigidity. Therefore, the soundproof side wall 3 having a sandwich structure in which the face plates 11 and 12 are coupled to each other using the core plate as a core material improves the mounting strength to the roof 1a, the bending rigidity and the ring rigidity of the soundproof side wall 3 itself.

  In addition, since the connecting portions of the inner and outer face plates 11 and 12 and the density thereof are remarkably increased, the bending rigidity of the face plates 11 and 12, that is, the surface rigidity is increased, and vibration characteristics and resonance characteristics can be suppressed. As compared with the case of reinforcing and connecting structures at sparse intervals while having relatively many bones e and f, sound insulation is improved. In general, in a single wall, the bending vibration of the wall material and the vibration of the incident sound wave resonate in a certain frequency band as shown in FIG. In a certain two frequency bands as shown in FIG. 3, a resonance phenomenon between the wall plates related to the air spring action in the hollow portion causes a coincidence phenomenon in which the transmission loss is lower than the mass law. Such resonance and resonance can be suppressed by the coupling of 12, and the coincidence phenomenon can be reduced.

  Accordingly, the soundproof side wall 3 can be reduced in weight and cost by reducing the material of each part and the whole without reducing the attachment strength, the rigidity of the ring and the sound insulation. Therefore, it can sufficiently cope with further increase in the speed of the vehicle. In addition, the honeycomb core 13 can be coupled with a simple structure between the face plates 11 and 12 as a core material having a size corresponding to the joining region of the inner and outer face plates 11 and 12, and this can also reduce the cost. .

  Here, the inner and outer face plates 11 and 12 and the honeycomb core 13 are both made of lightweight structural materials such as aluminum and carbon fiber reinforced plastics, without impairing the mechanical and physical characteristics as described above. Further, the weight can be reduced. Lightweight structural materials can be selected from various materials already known for their formability, mechanical strength, physical properties, etc., and foam aluminum and magnesium can also be used. The same applies to what is done.

  The bonding of the face plates 11 and 12 through the honeycomb core 13 is preferably performed by brazing, bonding, welding with diffusion, softening, melting, or welding. This is because the end portion of the partition wall 13a of the honeycomb core 13 forms a fine and uniform opening, covers the entire end surface 13b, and contacts the face plates 11 and 12 opposed to the entire surface region to form a mesh. Since there is an advantage that all the contact boundary portions that spread uniformly can be utilized in the coupling portion, a high degree of coupling can be obtained. Specifically, the entire face plate area is brazed or bonded all at once with a brazing material or an adhesive applied, fused, or sandwiched between at least one of the joints of the honeycomb core 13 and the inner and outer face plates 11 and 12. Can be combined. Further, the entire face plate area can be joined together at once or sequentially by diffusion, softening due to friction, vibration, electrical resistance, etc., welding with melting, and welding environment.

  It is convenient to use various types of brazing materials such as resin, glass and metal for brazing and to use a thermosetting adhesive for bonding. In either case, the brazing material is temporarily applied by applying heat from outside by applying or fusing or sandwiching at least one of the joints of the honeycomb core 13 and the face plates 11 and 12 to each other. After being melted and cured, the adhesive is cured as it is, and the honeycomb core 13 and the face plates 11 and 12 can be bonded. It is common to use ultrasonic waves for welding and resistance welding for welding, which can be easily realized. In the present embodiment, all of the face plates 11 and 12 and the honeycomb core 13 are made of an aluminum material and soldered to each other.

  However, the coupling method is not particularly limited, and various methods already known and later developed can be selected and adopted. In some cases, it is possible to adopt a mechanical coupling method such as a caulking coupling to a sandwich state by a stay or a screw coupling, such as a material that is not suitable for welding, welding, or adhesion, but it takes time.

  In the present embodiment, as shown in FIGS. 3 to 5, the inner and outer face plates 11, 12 are connected between the upper edges by a frame frame 14 made of a shape material, and the lower edges are made of a shape material, and the roof of the vehicle 1. It is connected by a fixed frame 15 having a mounting portion 15a on the 1a side. Thus, the peripheral shape of the soundproof side wall 3 is changed to the inner and outer face plates 11 and 12 by the cross-sectional shapes of the frame frame 14 and the fixed frame 15 connecting the upper and lower edges of the inner and outer face plates 11 and 12. Can be obtained by satisfying the same continuous state as seen in FIG.

  Specifically, as shown in FIGS. 3 and 4, the frame frame 14 has a semicircular cross-sectional portion 14 a at the upper edge of the soundproof side wall 3, and stepped portions on both the inner and outer sides of the joint side with the face plates 11 and 12. A straight connecting portion 14c is formed in the thickness direction of the soundproof side wall 3 having 14b. The upper edges of the face plates 11 and 12 are flush with the outer surface of the semicircular cross-sectional portion 14a with the stepped portion 14b sandwiched between the connecting portions 14c, and the connecting portion 14c and the upper edges of the face plates 11 and 12 are connected to each other. By welding, the upper edges of the face plates 11 and 12 are connected via the connecting portion 14c. As a result, a high bonding force can be obtained without taking time and effort.

  The fixed frame 15 has a channel-shaped connecting portion 15b opened upward at the upper portion, and a step portion 15c is formed inside and outside the portion of the connecting portion 15b covered with the channel material 16 outside the open portion. The lower edges of the inner and outer face plates 11 and 12 are applied to the step portion 15c so as to be flush with the outer surface of the base portion of the connecting portion 14b with the connecting portion 15b interposed therebetween, and the connecting portion 15b and the lower edges of the face plates 11 and 12 Are joined to each other through the connecting portion 15b. As a result, a high bonding force can be obtained without taking time and effort.

  As a result, the bending rigidity and mechanical strength of the periphery of the soundproof side wall 3 can be increased, and the attachment portion 15a to the roof 1a of the vehicle 1 is also provided by the fixed frame 15 together with the connection, that is, by the connection. In particular, both the frame frame 14 and the fixed frame 15 are hollow members, and are lighter and have higher bending rigidity and mechanical strength. The welding for connection in this case may be spot discontinuous welding, but continuous welding such as seam welding is advantageous in terms of various strengths and various rigidity. Further, the frame member 14 and the fixed frame 15 are made of lightweight structural materials such as aluminum and carbon fiber reinforced plastics, and the mechanical and physical characteristics of the soundproof side wall 3 are also obtained. Further weight reduction can be achieved without impairing the above. In this case as well, welding or adhesion instead of welding may be used, but a mechanical coupling method such as caulking coupling or screw coupling using stays, rivets, or projections may be employed.

  Further, the connecting portions 14c and 15b of the frame frame 14 and the fixed frame 15 are configured to keep the upper and lower edges of the inner and outer face plates 11 and 12 at substantially the same distance. Thus, the inner and outer face plates 11 and 12 connected between the upper edge and the lower edge by the frame frame 14 and the fixed frame 15 have an interval S uniquely determined on the side of each frame 14 and 15. 4 can be brought into a parallel state, and can be coupled to each other by a simple honeycomb core 13 having a uniform thickness. In other words, the honeycomb core 13 may have a simple shape in which the inner and outer end faces are parallel to each other, and the cost is not increased as compared with the case where the shape is complicated.

  However, as shown in FIG. 5B, screw holes 17 for connecting eyebolts are provided on one side of the soundproof side wall 3, for example, on the left and right sides of the outer surface. Since the reinforcing member 18 is applied to the inside of the screw hole 17 in order to withstand the load at that time, the honeycomb core 13 must be provided avoiding the reinforcing member 18. For this purpose, the reinforcing member 18 is sandwiched between the inner and outer face plates 11 and 12, and the honeycomb core 13 is divided at that portion, or the reinforcing member 18 is applied only to the face plate 11 side having the screw holes 17. 13 is provided with a digging groove for avoiding the reinforcing member 18. However, in any case, it does not take much time and does not cause an increase in cost.

  As shown in FIGS. 4 and 5, the frame frame 14 and the fixed frame 15 further have a coupling end 31 in which the end portions 14 f and 15 f are joined together to form a frame frame in which these end portions are coupled. 14 and the fixed frame 15, the main body A holding the face plates 11 and 12 and the honeycomb core 13 is formed, and the fixed frame 15 is connected to the main body A from the coupling end 31 at a position where the fixed frame 15 is attached to the roof 1 a of the vehicle 1. A sheet metal working member 32 having a side wall surface extending to the roof surface of the vehicle 1 in a flush state is connected to the coupling end 31, and the side shape is triangular as shown in FIG. 5 (c). Part B is formed. The coupling of the coupling end 31 is preferably performed by welding with a low coupling force and high coupling force, but is not limited to this as in the case of other couplings. For welding, it is easy to obtain the necessary coupling strength by cutting out and contacting a flat contact surface having an appropriate width between the end portions 14f and 15f of the frame frame 14 and the fixed frame 15. Further, the connection between the main body A and the end B is suitable, but the present invention is not limited to this.

  In this way, the frame frame 14 and the fixed frame 15 are joined together by bringing the end portions 14f and 15f together, thereby connecting the inner and outer face plates 11 and 12 between the upper edge and the lower edge. By forming a closed annular frame, the entire periphery of the inner and outer face plates 11, 12 can be connected and supported with high bending rigidity and mechanical strength. Therefore, both the connection strength between the face plate area by the face plates 11 and 12 and the fixed frame 15 side and the rolling rigidity are increased. In addition, the sheet metal processing member 32 is connected to the coupling end 31 and the vehicle 1 is flush with the main body A from the coupling end 31 at a position where the fixed frame 15 is attached to the roof 1a of the vehicle 1. Since the side wall surface extending to the roof surface of the soundproof side wall 3 is formed, the fin-like rising shape of the fish at both ends of the soundproof side wall 3 can be easily made into any shape without the influence of the frame frame 14 and the fixed frame 15 made of the shape material. Can be formed. The sheet metal working member 31 is preferably made of the same material as the face plates 11 and 12.

  Further, the fixed frame 15 has a hollow portion that continues below the connecting portion 15b with a larger width as an attachment portion 15a, and the bottom portion of the attachment portion 15a that is a hollow portion is a horizontal attachment seat 15d to the roof. The connecting portion 15b has an attachment angle θ for attaching the face plates 11 and 12 to the attachment seat 15d at a predetermined angle as shown in FIG. In this way, when the fixed frame 15 connects the lower edges of the inner and outer face plates 11 and 12 with the connecting portion 15b, the attachment portion 15a, which is a hollow portion having a larger width, is provided below the connecting portion 15b. , And the bottom part thereof forms a mounting seat 15d to the roof, so that the mounting part 15a, which is a hollow part, has a large width and a box structure so that the mounting strength to the roof 1a and the rigidity of the soundproof side wall 3 at the base part The face plate area formed by the face plates 11 and 12 extending upward from the connecting portion 15b is connected with a connecting portion 15b having a width smaller than that of the mounting portion 15a which is a hollow portion as shown in FIGS. As a small material, the structure and shape can be reduced without complicating the structure and shape. Even in this face plate area, the honeycomb core 13 provides the necessary bending rigidity and bending rigidity. Nau it is not. Further, since the mounting seat 15d is horizontal, if the fixing frame 15 is attached to the roof 1a so as to keep the mounting seat 15d horizontal, a predetermined rising posture can be easily secured without being affected by the curvature of the roof 1a. Therefore, the rising angle θ of the face plate area by the face plates 11 and 12 connected by the connecting portion 15b set at a predetermined angle with respect to the mounting seat 15d becomes appropriate. Each inclination α with respect to the vertical line 118 is 90 ° −θ. Each inclination α is, for example, about 1/8 in terms of the inclination and is inclined inward to prevent the reflected sound from coming out and becoming noise.

  As shown in FIGS. 3 and 4, the fixed frame 15 is attached to the roof 1 a by screwing to a mounting base 21 that is disposed in the longitudinal direction of the roof 1 a and is attached by fillet welding or the like. As shown in FIG. 5, the mounting base 21 is made of a sheet metal working member bent into a U-shaped cross section or a shape cut material, and the leg surfaces 21 a of the mounting base 21 face the running direction of the vehicle 1. The roof 1a is welded, and the mounting seat 15d of the fixed frame 15 is screwed to the bridge portion 21b between the two leg portions 21a with two screws 23 in the inner and outer directions as shown in FIG. Thereby, the attachment intensity | strength which can guarantee sufficient sag-proof property of the soundproof side wall 3 is ensured. The mounting base 21 is not limited by material due to the screwing of the fixed frame 15, and is preferably made of the same material as the roof 1a from the viewpoint of welding. However, it is not limited to this.

  For this attachment work, the fixed frame 15 has two attachment holes 22 to the roof 1a as shown in FIG. 4 in the inner and outer directions at the bottom which is the attachment seat 15d of the attachment portion 15a which is the hollow portion. As a pair, they are arranged at predetermined intervals in the longitudinal direction. Further, a window 24 is provided between the pair of mounting holes 22 and the pair of mounting holes 22, and a partial bridge for mounting a portion having the pair of mounting holes 22 between the windows 24 to the roof 1 a. As shown in FIGS. 3 and 4, a work window 25 corresponding to the bridge portion 15a1 is provided on the inner wall 15e of the attachment portion 15a which is a hollow portion.

  Thereby, after securing the necessary attachment strength to the roof 1a of the vehicle 1 by arranging a predetermined number of partial bridge portions 15a1 with a predetermined width in the longitudinal direction of the bottom of the attachment portion 15a which is a hollow portion, The weight can be further reduced by the amount of the windows 24 provided between the bridge portions 15a1, and each bridge portion is provided by the work window 25 provided corresponding to each bridge portion 15a1 of the inner wall 15e of the attachment portion 15a. Further lightening can be achieved by providing the work window 25 while facilitating the attachment work to the roof 1a at 15a1.

Further, the inner wall 15e of the attachment portion 15a is inclined obliquely outward as shown in FIG. 3 with respect to the attachment seat 15d. The inclination angle β is about 60 °. Such an inclination causes the mounting portion 15a to secure a sufficiently large width with respect to the thickness of the face plate area by the face plates 11 and 12, while reducing the difference in width at the boundary with the face plate area, You can improve your familiarity and not disturb it. Further, since it is inclined so as to bow toward the bridge portion 15a1, the screw 23 using the two attachment holes 22 provided in pairs in the inside and outside of the bridge portion 15a1 can be screwed or repaired. It is easy to look into and remove a hand or a tool for the removal work in one case. In addition, since the cross-sectional shape of the mounting portion 15a is trapezoidal, it can be made slimmer than a quadrangle, which is advantageous in terms of weight reduction and cost reduction, and secures the mounting strength of the soundproof side wall 3 and the sag resistance at the base portion. This is a convenient form.

  Furthermore, it is attached to the inner wall 15e of the attachment portion 15a, which is a hollow portion, so that it can be attached to and detached from the surface having the work window 25, and at the attachment position of the fixed frame 15 to the roof 1a of the vehicle 1. As shown in FIG. 3, the cover member 33 extends to the roof surface of the vehicle 1. The cover member 33 is preferably screwed with a screw 34 as shown in FIG. However, it is not limited to this. When the surface having the work window 25 of the attachment portion 15a which is a hollow portion is exposed, the cover member 33 prevents the work window 25 from increasing the aerodynamic resistance or generating aerodynamic noise. can do. Moreover, since the cover member 33 extends to the roof surface as shown in FIG. 3 at the position where the fixed frame 15 is attached to the roof 1a, the soundproof side wall 3 can form a surface that rises without any gap from the roof 1a. it can.

  Such a cover member 33 can also be made of a lightweight structural material such as aluminum-based or carbon fiber reinforced plastics, and the cover member 33 is attached to the inner wall 15e of the attachment portion 15a which is a hollow portion. In combination with the fact that the whole can be sufficiently supported and made thin, it is possible to further reduce the weight without reducing the overall mechanical strength, bending rigidity, and twisting rigidity.

  Moreover, since the outer wall 15g of the attachment portion 15a forming the hollow portion has the skirt wall 15h extending to the roof surface of the vehicle 1 at the position where the fixed frame 15 is attached to the roof 1a, the roof The surface where the soundproof side wall 3 rises from the roof 1a without a gap by the skirt wall 15h without being affected by the height of the outer wall position being lower than the inner wall position of the mounting portion 15a due to the curved surface. Can be formed.

  Here, FIG. 8 shows the experimental results of the sound transmission loss of the two examples in the present embodiment and the comparative example having the conventional structure together with the mass law in the case of the plate thickness of 5 mm. In the comparative example, both face plates are 2.5 mm, and in Examples 1 and 2, one of the face plates is slimmed to 1.0 mm and the other is 0.5 mm, and the total thickness of the face plate portion of Example 1 is 21.7 mm. The total thickness of the face plate portion of Example 2 was 41.7 mm. In both Examples 1 and 2, the honeycomb core 13 had a partition wall pitch of 20 mm and a partition wall thickness of 0.2 mm.

  From FIG. 8, compared with the comparative example, Examples 1 and 2 have better sound insulation, and Example 2 has higher sound insulation than Example 1. In Example 2, the frequency with the coincidence phenomenon occurs in the vicinity of 200 Hz and in the vicinity of 2.5 KHz, which is good with almost no drop on the high frequency side. Moreover, even if the sliding sound of a boat body is 2 KHz-3 KHz, it is thought that a sound insulation effect is not impaired. Although the sound insulation characteristic is reduced by the slimming, a sufficient sound insulation effect can be obtained if the thickness of the face plate portion is secured to about 50 mm, and the weight can be reduced sufficiently and the cost can be reduced as compared with the conventional case.

  Of course, it can be industrially used as a soundproof side wall of a current collector in a Shinkansen vehicle, and can contribute to further speeding up.

It is a perspective view which shows the soundproof side wall of the current collector for rail vehicles which concerns on embodiment of this invention. It is a side view of the soundproof side wall of FIG. It is sectional drawing of the soundproof side wall of FIG. It is a perspective view which shows the relationship with the roof of the railway vehicle of the soundproof side wall of FIG. 1 in a removal state. 1 shows a soundproof side wall of FIG. 1, (a) is a side view seen from the inside, (b) is a side view seen from the outside, and (c) is a cross-sectional view. It is a graph which shows the relationship of the transmission loss with respect to the mass law in a single wall. It is a graph which shows the relationship of the transmission loss with respect to the mass law in a hollow wall. It is a graph which shows the difference in transmission loss when thickness is changed by the size in the new structure in this Embodiment, making a conventional structure a comparative example. The conventional soundproof side wall is shown, (a) is a side view, (b) is the front view seen in the vehicle running direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 1a Roof 2 Current collector 3 Soundproof side wall 11, 12 Face plate 13 Honeycomb core 14 Frame frame 15 Fixed frame 15a Mounting part 15a1 Bridge part 15d Mounting seat 15e Inner wall 15g Outer wall 15h Skirt wall 14c, 15b Connecting part 14f 15f End portion 21 Mounting base 24 Window 25 Work window 31 Joint end 32 Sheet metal processing member 33 Cover member A Main body portion B End portion

Claims (12)

A soundproof side wall of the current collector installed upright on both sides of the current collector installed on the roof of the vehicle,
A soundproof side wall of a current collector having a shape that rises in a wing shape from a roof of a vehicle and is joined via a honeycomb core sandwiched between face plates arranged on the front and back sides. A soundproof side wall of the current collector installed upright on both sides of the current collector installed on the roof of the vehicle,
Starting with aluminum and carbon fiber reinforced plastics that have a shape that rises like a wing from the roof of the vehicle, with inner and outer plates made of lightweight structural materials such as aluminum and carbon fiber reinforced plastics sandwiched between them. A soundproofing side wall of a current collector, wherein the soundproofing device is bonded via a honeycomb core made of a lightweight structural material. The soundproof side wall of the current collector according to any one of claims 1 and 2, wherein the coupling is performed by brazing, bonding, welding by diffusion, softening, or melting, or welding. The inner and outer face plates are connected between the upper edges by a frame frame made of a shape material, and the lower edges are connected by a fixed frame made of a shape material and having a fixing portion to the roof side of the vehicle. A soundproof side wall of the current collector according to claim 1. The soundproof side wall of the current collector according to claim 4, wherein the shape member is a hollow material made of a lightweight structural material such as aluminum-based and carbon fiber reinforced plastics. The current collector according to any one of claims 4 and 5, wherein the frame frame and the fixed frame have a connecting portion for connecting the upper and lower edges of the inner and outer face plates while maintaining substantially the same distance. Soundproof side wall of the device. The fixed frame has a hollow portion that has a width larger than that below the connecting portion, and the bottom of the hollow portion forms a horizontal mounting seat on the roof, and its own connecting portion has a predetermined angle with respect to the mounting seat. The soundproofing side wall of the current collector according to claim 6, wherein the soundproofing device has an attachment angle for attaching the face plate. The fixed frame is provided with a mounting hole for the roof in the longitudinal direction at the bottom of the hollow part, a window is provided between the mounting holes, and a bridge part is attached between the windows to the roof. The soundproof side wall of the current collector according to claim 7, wherein a work window corresponding to the mounting portion is provided on the wall. The inner wall of the hollow portion is attached so as to be detachable so as to cover the surface having the work window, and has a cover member that extends to the roof surface of the vehicle at the attachment position of the fixed frame to the vehicle roof. The soundproof side wall of the current collector according to any one of claims 7 and 8. The current collector according to any one of claims 7 to 9, wherein the outer wall of the hollow portion has a skirt wall extending to a roof surface of the vehicle at a position where the fixed frame is attached to the roof of the vehicle. Soundproof side walls. The frame frame and the fixed frame have a coupling end in which the end portions of the frame frame and the fixed frame are joined together to form a main body that holds the face plate and the honeycomb core material between the frame frame and the fixed frame. The sheet metal processing member which makes the side wall surface extended to the roof surface of a vehicle in the state flush with the main-body part from the said joint end in the attachment position to the roof of Claim 1-10 is connected to the said joint end. A soundproof side wall of the current collector according to claim 1. The soundproof side wall of the current collector according to claim 9, wherein the cover member is made of a lightweight structural material such as aluminum or carbon fiber reinforced plastics.

Images