Rail vehicle

Abstract

To provide a rail vehicle that improves rigidity against a vertically bending vibration while avoiding the increase of mass of the rail vehicle and interference with an infrastructure facility.SOLUTION: A rail vehicle comprises: a roof body structure constituting a top surface; a side structure constituting a side surface; a gable structure constituting an end surface of the side structure in a longitudinal direction; an underframe constituting a bottom surface; and a truck supporting the underframe. The side structure has multiple openings and a pier panel part between the openings. A reinforcement body is arranged on a vehicle inner surface of a pier panel part between the one opening located above the truck and the other opening adjacent to the one opening and located close to the center in a longitudinal direction of the rail vehicle so as to extend from an upper corner of one opening to a lower corner of the other opening.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a rail vehicle.

Background Art

[0002] A rail vehicle generally consists of a roof structure forming the upper surface, side structures forming the sides, a frame forming the lower surface, gable structures forming the longitudinal end faces, and bogies supporting the frame. In recent years, for the purpose of improving manufacturability and sound insulation, a method of constructing the roof structure, side structures, frame, etc. with hollow profiles made of aluminum alloy consisting of two opposing face plates and a plurality of ribs connecting the face plates and assembling them into a rail vehicle has been spreading.

[0003] A rail vehicle travels along a track by means of bogies which are running gear. A vibration force is transmitted to the rail vehicle from the track via the bogies. As a result, the rail vehicle may vibrate in a bending mode in the vertical direction, deteriorating the riding comfort of passengers. Therefore, the rail vehicle must maintain sufficient rigidity against this vertical bending vibration.

[0004] An example of a technique for improving the rigidity of a rail vehicle against vertical bending vibration is shown in Patent Document 1. According to this technique, by considering the moment distribution generated in a railway vehicle and improving the rigidity of the roof structure and side beams at the central part in the longitudinal direction of the railway vehicle, the rigidity of the railway vehicle against vertical bending vibration can be efficiently improved.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In order to improve the rigidity of a rail vehicle against vertical bending vibration, measures such as "increasing the longitudinal elastic modulus of the material used for the rail vehicle" and "increasing the second moment of area of the rail vehicle" are first considered. However, changing the material of the rail vehicle or increasing its outer dimensions often causes a significant increase in mass and interference with surrounding infrastructure, and is often not practical. Generally, materials with a high longitudinal elastic modulus also have a high density, so the adoption of such materials can contribute to an increase in mass. In addition, as a measure to ensure rigidity against vertical bending vibration, it is also an option to further increase the thickness of the hollow section material having the same plate thickness in the longitudinal direction of the rail vehicle, but this is not desirable because it causes a significant increase in mass. Thus, there are problems to be solved in order to improve the rigidity against vertical bending vibration while avoiding an increase in the mass of the rail vehicle and interference with infrastructure.

[0007] An object of the present invention is to provide a rail vehicle with improved rigidity against vertical bending vibration while avoiding an increase in the mass of the rail vehicle and interference with infrastructure.

Means for Solving the Problems

[0008] To solve the above problems, one of the representative rail vehicles according to the present invention includes a roof structure that constitutes the upper surface, a side structure that constitutes the side surface, a gable structure that constitutes the longitudinal end surface of the side structure, a frame that constitutes the lower surface, and a bogie that supports the frame. The side structure has a plurality of openings and blowing portions between the openings. A reinforcing member is disposed on the inner surface of the vehicle of the blowing portion between one opening located above the bogie and the other opening adjacent to the one opening and located closer to the center in the longitudinal direction of the rail vehicle so as to extend from the upper corner of the one opening to the lower corner of the other opening.

Effects of the Invention

[0009] According to the present invention, by providing reinforcement at a location that is efficient in improving the rigidity against vertical bending vibration and on the interior surface of the vehicle, it is possible to provide a rail vehicle with improved rigidity against vertical bending vibration while avoiding an increase in the mass of the rail vehicle and interference with infrastructure facilities. The configuration, operation, and effects of the present invention other than those described above will be clarified by the description of the following embodiments.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Modes for Carrying Out the Invention

[0011] Hereinafter, with reference to the drawings, a rail vehicle which is an embodiment of the present invention will be described. A rail vehicle is a general term for vehicles that run along a laid track, and means railway vehicles, tramcars, new transport system vehicles, monorail vehicles, etc. Hereinafter, with reference to the drawings, as a representative example of a rail vehicle, a railway vehicle will be exemplified to describe the embodiments of the present invention.

[0012] [First Embodiment] FIG. 1 is a side view schematically showing an example of a railway vehicle. As shown in FIG. 1, the vertical (height) direction of the railway vehicle 1 is defined as z, and the width direction and the longitudinal direction orthogonal thereto are defined as y and x, respectively.

[0013] The railway vehicle 1 is composed of side structures 20, 20 (only one is shown in the figure) erected at both ends in the width direction y of the underframe 10, gable structures 30, 30 (only one is shown in the figure) erected at both ends in the longitudinal direction x of the underframe 10, and a roof structure 40 placed on the upper ends in the vertical (height) direction z between the side structures 20, 20 and the gable structures 30, 30. The side structures 20, 20 are provided with an entrance / exit part 21 having a door for passengers to get on and off, and a window part 22 for passengers to view the scenery outside the vehicle. There is a blowing part 26 between the window parts 22. It is preferable that the side structures 20, 20, etc. are formed of hollow extruded profiles. Also, below both ends in the longitudinal direction x of the underframe 10, bogies 5 which are running gear are provided. The bogies 5 support the underframe 10 and run on the track 90.

[0014] Here, the stress state of the railway vehicle 1 will be described with reference to FIGS. 5 and 6. FIG. 5(a) is a model showing a state in which the railway vehicle 1 simulated by a simple beam 100 is supported by two support parts 101 (corresponding to the bogies 5). It is assumed that an evenly distributed load 102 acts along the vertical direction z of the railway vehicle 1 due to the weight of the vehicle itself and the weight of passengers, etc. Since the railway vehicle 1 is excited by the track 90 when the bogies 5 run on the track 90, and accordingly the evenly distributed load 102 also fluctuates, here it is assumed that the maximum evenly distributed load 102 acts.

[0015] FIG. 5(b) is a shear force distribution diagram (Q diagram) showing the shear force received by the railway vehicle 1. As shown in FIG. 5(b), a shear force distribution 103 occurs. Here, the horizontal axis represents the position in the longitudinal direction of the railway vehicle 1, and the vertical axis represents the shear force generated at the corresponding position.

[0016] FIG. 6 is a diagram for explaining the shear stress and the principal stress direction acting on the railway vehicle 1. In proportion to the shear force received by the railway vehicle 1, a shear stress 104 as shown in FIG. 6 occurs. The principal stress direction (the direction in which the perpendicular stress becomes an extreme value) with respect to the shear stress 104 is 105, which is an inclined direction inclined with respect to the longitudinal direction x and the vertical direction z of the railway vehicle 1.

[0017] From this, it can be understood that the maximum shear force acts on the bogie 5 near the center in the longitudinal direction x of the railway vehicle 1. That is, in order to efficiently improve the rigidity of the railway vehicle 1 against vertical bending vibration, it is effective to adopt a structure that can efficiently bear the shear force near the center in the longitudinal direction x of the railway vehicle 1 of the bogie 5.

[0018] Fig. 2 shows an enlarged view of the vicinity of the bogie 5 of the railway vehicle 1 shown in Fig. 1. When viewed in the direction of Fig. 2 (viewed along the width direction y of the railway vehicle 1), the center line B in the longitudinal direction x of the bogie 5 overlaps with the window portion 22a (above the center in the longitudinal direction x of the bogie 5). There is a blowing portion 26a between the window portion 22a and the window portion 22b adjacent to the center in the longitudinal direction x of the side structure 20 of the window portion 22a. Also, there is a blowing portion 26b between the window portion 22b and the window portion 22c adjacent to the center in the longitudinal direction x of the side structure 20 of the window portion 22b. Note that the window portions 22a, 22b, and 22c are rectangular openings in the side structure 20. Also, near the end in the longitudinal direction x of the side structure 20 of the window portion 22a, there is an entrance / exit portion 21a which is a rectangular opening in the side structure 20.

[0019] On the sides of the window portion 22a and the window portion 22b that are close to each other, a reinforcing body 50 is attached to the inner surface of the vehicle (the side structure outside the interior panel) of the blowing portion 26a so as to extend from the upper corner of the window portion 22a toward the lower corner of the window portion 22b and from the lower corner of the window portion 22a toward the upper corner of the window portion 22b (that is, in an X shape when viewed in the direction shown in Fig. 2). Also, on the sides of the window portion 22b and the window portion 22c that are close to each other, a reinforcing body 50 is attached to the inner surface of the vehicle (the side structure outside the interior panel) of the blowing portion 26b so as to extend from the upper corner of the window portion 22b toward the lower corner of the window portion 22c and from the lower corner of the window portion 22b toward the upper corner of the window portion 22c (that is, in an X shape when viewed in the direction shown in Fig. 2). The reinforcing body 50 is made of a fibrous resin (for example, CFRP (Carbon Fiber Reinforced Plastics)), and the fiber stretching direction is along the stretching direction of the reinforcing body 50. However, the fibrous resin is not limited to CFRP.

[0020] Note that the reinforcing member 50 is provided on the side structures 20, 20 on both sides, and may be attached only to the blowing portion 26a near the carriage 5, or may be attached to the blowing portion near the center in the longitudinal direction x of the side structure 20 in addition to the blowing portions 26a, 26b. The reinforcing member 50 preferably contacts the upper or lower corner of the opening, but does not necessarily have to contact, and it is sufficient if it extends to the vicinity thereof. Further, the reinforcing member 50 may be made of metal or other materials, but fibrous resin is suitable because it is relatively lightweight.

[0021] According to the above configuration, the maximum shear force acting on the center in the longitudinal direction x of the railway vehicle 1 of the carriage 5 is shared and borne by the side structure 20 and the reinforcing member 50 disposed in an oblique direction close to the principal stress direction 105 and on the inner side of the vehicle. Therefore, it is possible to efficiently improve the rigidity against vertical bending vibration while avoiding an increase in the mass of the rail vehicle and interference with the infrastructure. Further, since stress concentration is likely to occur around the window portion 22 which generally becomes an opening portion, the stress concentration can be alleviated by the reinforcing member 50 disposed in the blowing portion 26.

[0022] [Second Embodiment] Hereinafter, a second embodiment of the rail vehicle according to the present invention will be described. Since the configuration other than the vicinity of the carriage of the railway vehicle is the same as that of the previous embodiment, the description thereof will be omitted.

[0023] FIG. 3 shows an enlarged view of the vicinity of the carriage 5 of the railway vehicle 1 shown in FIG. 1 according to the second embodiment. Also in this embodiment, when viewed in the direction of FIG. 2 (viewed along the width direction y of the railway vehicle 1), the center line B in the longitudinal direction x of the carriage 5 overlaps with the window portion 22a (above the center in the longitudinal direction x of the carriage 5). There is a blowing portion 26a between the window portion 22a and the window portion 22b adjacent to the center in the longitudinal direction x of the side structure 20 of the window portion 22a. Further, there is a blowing portion 26b between the window portion 22b and the window portion 22c adjacent to the center in the longitudinal direction x of the side structure 20 of the window portion 22b. Note that the window portions 22a, 22b, and 22c are rectangular openings of the side structure 20. Further, near the end in the longitudinal direction x of the side structure 20 of the window portion 22a, there is an entrance / exit portion 21a which is a rectangular opening of the side structure 20.

[0024] On the side where the window portions 22a and 22b are close to each other, a reinforcing member 50 is attached to the vehicle interior surface (the side structure outside the interior panel) of the blowing portion 26a so as to extend from the upper corner of the window portion 22a toward the lower corner of the window portion 22b. Also, on the side where the window portions 22b and 22c are close to each other, a reinforcing member 50 is attached to the vehicle interior surface (the side structure outside the interior panel) of the blowing portion 26b so as to extend from the upper corner of the window portion 22b toward the lower corner of the window portion 22c. The reinforcing member 50 is made of a fibrous resin as in the above-described embodiment, and the fiber stretching direction is along the stretching direction of the reinforcing member 50. However, the reinforcing member 50 may be attached to the vehicle interior surface of the blowing portion 26a so as to extend from the lower corner of the window portion 22a toward the upper corner of the window portion 22b, and the reinforcing member 50 may also be attached to the vehicle interior surface of the blowing portion 26b so as to extend from the lower corner of the window portion 22b toward the upper corner of the window portion 22c.

[0025] Also, the reinforcing member 50 may be provided on the side structures 20, 20 on both sides and may be attached only to the blowing portion 26a near the bogie 5, or may be attached to the blowing portion near the center in the longitudinal direction x of the side structure 20 in addition to the blowing portions 26a and 26b. The reinforcing member 50 preferably contacts the upper corner or the lower corner of the opening, but does not necessarily have to contact, and it is sufficient if it extends to the vicinity thereof. Also, the reinforcing member 50 may be made of metal or other materials, but fibrous resin is suitable because it is relatively lightweight.

[0026] Even if the reinforcing member 50 is only arranged along one of the principal stress directions as in the present embodiment, there are effects of improving the rigidity and reducing the stress against vertical bending vibration. Furthermore, according to the present embodiment, in addition to being able to simplify the reinforcing member 50, the weight can be reduced, so that the mass of the railway vehicle 1 can be further reduced.

[0027] [Third Embodiment] Hereinafter, a third embodiment of the track vehicle according to the present invention will be described. Since the configuration other than the vicinity of the bogie of the railway vehicle is the same as that of the previous embodiment, the description thereof will be omitted.

[0028] Fig. 4 shows an enlarged view of the vicinity of the bogie 5 of the railway vehicle 1 shown in Fig. 1 according to the third embodiment. When viewed in the direction of Fig. 4 (viewed along the width direction y of the railway vehicle 1), the center line B in the longitudinal direction x of the bogie 5 overlaps with the entrance / exit portion 21a (above the center in the longitudinal direction x of the bogie 5). There is a blowing portion 26a between the entrance / exit portion 21a and the window portion 22a adjacent to the center in the longitudinal direction x of the side structure 20 of the entrance / exit portion 21a. Also, there is a blowing portion 26b between the window portion 22a and the window portion 22b adjacent to the center in the longitudinal direction x of the side structure 20 of the window portion 22a. Note that the window portion 22a, the window portion 22b, and the entrance / exit portion 21a are rectangular openings in the side structure 20.

[0029] On the sides where the entrance / exit portion 21a and the window portion 22a are close to each other, a reinforcing body 50 is attached to the inner surface of the vehicle (the side structure outside the interior panel) of the blowing portion 26a so as to extend from the upper corner of the entrance / exit portion 21a to the lower corner of the window portion 22a. Also, on the sides where the window portion 22a and the window portion 22b are close to each other, a reinforcing body 50 is attached to the inner surface of the vehicle (the side structure outside the interior panel) of the blowing portion 26b so as to extend from the upper corner of the window portion 22a to the lower corner of the window portion 22b. The reinforcing body 50 is made of a fibrous resin as in the above-described embodiment, and the stretching direction of the fibers is along the stretching direction of the reinforcing body 50. However, the reinforcing body 50 may be attached to the inner surface of the blowing portion 26a so as to extend from the lower corner of the entrance / exit portion 21a to the upper corner of the window portion 22a, or the reinforcing body 50 may be attached to the inner surface of the blowing portion 26b so as to extend from the lower corner of the window portion 22a to the upper corner of the window portion 22b.

[0030] Also, the reinforcing body 50 may be provided on the side structures 20, 20 on both sides and attached only to the blowing portion 26a closer to the bogie 5, or may be attached up to the blowing portion closer to the center in the longitudinal direction x of the side structure 20 in addition to the blowing portions 26a, 26b. It is preferable that the reinforcing body 50 is in contact with the upper corner or the lower corner of the opening, but it is not necessarily in contact, and it is sufficient if it extends up to the vicinity thereof. The reinforcing body 50 disposed in the blowing portions 26a, 26b may be in an X shape as in the first embodiment. Also, the reinforcing body 50 may be made of metal or other materials, but a fibrous resin is suitable because it is relatively lightweight.

[0031] According to the above embodiment, even in the configuration where the center line B in the longitudinal direction x of the carriage 5 overlaps with the entrance / exit portion 21a when viewed in the direction of FIG. 4, the effects shown in the previous embodiment can be obtained.

[0032] Note that the present invention is not limited to the above-described embodiments, and includes various modifications other than the above. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Also, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, for a part of the configuration of each embodiment, addition, deletion, or replacement with other configurations is possible.

[0033] This specification includes the following disclosure of the invention. (First aspect) A track vehicle including a roof structure that constitutes the upper surface, a side structure that constitutes the side surface, a gable structure that constitutes the longitudinal end surface of the side structure, a base frame that constitutes the lower surface, and a carriage that supports the base frame, wherein the side structure has a plurality of openings and blowing portions between the openings, a reinforcing body is disposed on the inner surface of the vehicle of the blowing portion between one opening located above the carriage and another opening adjacent to the one opening and located closer to the center in the longitudinal direction of the track vehicle, so as to extend from the upper corner of the one opening toward the lower corner of the other opening. A track vehicle characterized by the above.

[0034] (Second aspect) A track vehicle according to the first aspect, wherein the reinforcing body is disposed on the blowing portion so as to extend from the lower corner of the one opening toward the upper corner of the other opening. A track vehicle characterized by the above.

[0035] (Third aspect) A track vehicle according to the first aspect or the second aspect, wherein the reinforcing member is made of a fibrous resin, and the stretching direction of the fiber is along the stretching direction of the reinforcing member, characterizing the track vehicle.

[0036] (Fourth Aspect) A track vehicle according to any one of the first aspect to the third aspect, wherein the opening is a rectangular window portion, characterizing the track vehicle.

[0037] (Fifth Aspect) A track vehicle according to any one of the first aspect to the fourth aspect, wherein the opening is a rectangular entrance / exit portion, characterizing the track vehicle.

[0038] (Sixth Aspect) A track vehicle according to any one of the first aspect to the fifth aspect, wherein, when viewed in the width direction of the track vehicle, the opening adjacent to the blowing portion provided with the reinforcing member overlaps with the center line of the bogie in the longitudinal direction of the track vehicle, characterizing the track vehicle.

Explanation of Reference Numerals

[0039] 1: Railway vehicle, 5: Bogie, 10: Truck frame, 20: Side structure, 21: Entrance / exit portion, 22: Window portion, 26: Blowing portion, 30: Gable structure, 40: Roof structure, 50: Reinforcing member, 90: Track, 100: Simple beam, 101: Support portion, 102: Uniformly distributed load, 103: Shearing force distribution, 104: Shearing stress, 105: Principal stress direction, B: Center line in the longitudinal direction of the bogie, z: Vertical direction, y: Width direction, x: Longitudinal direction

Claims

1. A track vehicle comprising a roof structure forming the upper surface, a side structure forming the side surface, a gable structure forming the longitudinal end surface of the side structure, a base frame forming the lower surface, and a carriage supporting the base frame, wherein the side structure has a plurality of openings and blowing portions between the openings, a reinforcing member is disposed on the inner surface of the vehicle of the blowing portion between one opening located above the carriage and another opening adjacent to the one opening and located closer to the center in the longitudinal direction of the track vehicle, so as to extend from the upper corner of the one opening toward the lower corner of the other opening. A track vehicle characterized by the above.

2. The track vehicle according to Claim 1, wherein the reinforcing member is disposed on the blowing portion so as to extend from the lower corner of the one opening toward the upper corner of the other opening. A track vehicle characterized by the above.

3. The track vehicle according to Claim 1, wherein the reinforcing member is made of a fibrous resin, and the stretching direction of the fiber is along the stretching direction of the reinforcing member. A track vehicle characterized by the above.

4. The track vehicle according to Claim 1, wherein the opening is a rectangular window portion. A track vehicle characterized by the above.

5. The track vehicle according to Claim 1, wherein the opening is a rectangular entrance / exit portion. A track vehicle characterized by the above.

6. The track vehicle according to Claim 1, wherein when viewed in the width direction of the track vehicle, the opening adjacent to the blowing portion provided with the reinforcing member overlaps the center line of the carriage in the longitudinal direction of the track vehicle. A track vehicle characterized by the above.

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