Title of the invention: Pillar structure of railroad vehicle and railroad vehicle
Technical field
[0001]
The present invention relates to a railroad vehicle pillow beam structure and a railroad vehicle, and particularly to a railroad vehicle pillow beam structure capable of securing a space between a pillow beam and an underframe and a railroad vehicle including the same.
Background technology
[0002]
In general, a vehicle structure (hereinafter referred to as a structure) includes a frame forming a floor surface, side structures arranged at both ends in the width direction of the frame, and wives placed at both ends in the longitudinal direction of the frame. It is a hexahedral structure composed of a structure, a side structure, and a roof structure arranged above the wife structure.
[0003]
The underframe includes side beams provided at both ends in the width direction of the underframe along the longitudinal direction, end beams connecting both ends in the longitudinal direction of the side beams, and a predetermined distance from the longitudinal ends of the structure. It is composed of a pillow beam provided along the end beam at the position of, and a middle beam arranged along the longitudinal direction of the structure for connecting the end beam and the pillow beam to the structure.
[0004]
The center pin provided on the lower surface of the pillow beam along the vertical direction of the structure is connected to the trolley frame constituting the trolley. When accelerating and decelerating the vehicle, the load in the front-rear direction of the vehicle is transmitted from the carriage to the pillow beam via the center pin.
[0005]
On the other hand, from the viewpoint of improving the assemblability of railway vehicles, it is required to facilitate the installation of wiring and ducts installed under the floor. In order to facilitate the installation, it is effective to provide a certain space between the underframe and the pillow beam in the state where the pillow beam is attached to the trolley and assemble it to the structure. As a trolley structure equipped with such a pillow beam, Patent Documents 1 and 2 propose a trolley provided with a pillow beam that is bolted only to a side beam.
Prior art literature
Patent documents
[0006]
Patent Document 1: European Patent Application Publication No. 2500231
Patent Document 2: European Patent Application Publication No. 2540592
Outline of the invention
Problems to be solved by the invention
[0007]
In the underframe structure of a railroad vehicle, in the case of a structure in which the pillow beam is connected only to the side beam, the pillow beam is twisted and deformed due to the moment load transmitted from the carriage to the pillow beam via the center pin. In addition, the vertical load transmitted from the trolley via the air spring due to the vertical vibration during traveling causes bending deformation of the pillow beam.
[0008]
In the trolley structure provided with the pillow beams described in Patent Documents 1 and 2, the pillow beam structure is composed of ribs and face plates having a uniform cross section along the width direction of the vehicle structure. With this configuration, there is a high possibility that the weight of the pillow beam will increase, and the size of the space between the pillow beam and the underframe may be restricted. In addition, the cost is high because the structure is composed of a dedicated rib and a face plate.
[0009]
In view of the above problems, the present invention secures a predetermined space between the pillow beam and the underframe, and while maintaining the rigidity of the pillow beam structure, the pillow beam structure can be reduced in weight and cost. And to provide railroad vehicles equipped with it.
Means to solve the problem
[0010]
In order to achieve the above object, one of the typical pillow beam structures of the present invention is a pillow beam structure provided on the underframe constituting the floor of the structure of the railway vehicle, and the width direction of the structure is the extrusion direction. The plurality of profiles are formed by joining a plurality of profiles having a multi-layer structure, and the plurality of profiles include a profile having a region in which a part of the underframe side is cut out at the center in the width direction of the structure. It includes a profile provided with a fastening portion formed by cutting out a part of a layer at both ends in the width direction of the structure, and is characterized in that the side beam of the underframe is fixed by the fastening portion.
Effect of the invention
[0011]
According to the present invention, in a pillow beam structure and a railway vehicle provided with the pillow beam structure, a predetermined space can be secured between the pillow beam and the underframe, and the cost can be reduced while maintaining the rigidity of the pillow beam structure.
Issues, configurations and effects other than the above will be clarified by the following embodiments.
A brief description of the drawing
[0012]
FIG. 1 is a side view of a railroad vehicle according to a first embodiment of the present invention.
FIG. 2 is a bottom perspective view of the vehicle structure of the first embodiment of the present invention.
FIG. 3 is a perspective view showing the appearance of the pillow beam according to the first embodiment of the present invention on the upper surface side.
FIG. 4 is a perspective view showing the appearance of the lower surface side of the pillow beam according to the first embodiment of the present invention.
FIG. 5 is an enlarged perspective view showing the joining of the profile of the pillow beam according to the first embodiment of the present invention.
FIG. 6 is an enlarged perspective view showing a fastening portion of a pillow beam according to a first embodiment of the present invention.
FIG. 7 is a diagram showing a cross section taken along the line AA of FIG.
FIG. 8 is a perspective view of an unprocessed profile used in the pillow beam of the first embodiment of the present invention.
FIG. 9 is a cross-sectional view cut along a plane perpendicular to the longitudinal direction of the unprocessed profile used in the pillow beam of the first embodiment of the present invention.
FIG. 10 is a diagram for explaining a connection state of a profile used in the pillow beam of the first embodiment of the present invention.
FIG. 11 is a perspective view showing a state before joining of each profile in the pillow beam of the first embodiment of the present invention.
FIG. 12 is an enlarged perspective view showing the configuration of a pillow beam according to a second embodiment of the present invention.
FIG. 13 is a cross-sectional view cut along a plane perpendicular to the longitudinal direction of the unprocessed profile used in the pillow beam of the third embodiment of the present invention.
FIG. 14 is a diagram for explaining a connection state of a profile used in the pillow beam of the third embodiment of the present invention.
Embodiment for carrying out the invention
[0013]
The embodiment for carrying out the present invention will be described with reference to FIGS. 1 to 14. First, each direction in each figure is defined. The traveling direction or longitudinal direction (front-back direction) of the railroad vehicle 100 (structure 1) is the X direction, the width direction (left-right direction) of the railroad vehicle 100 (structure 1) is the Y direction, and the height direction of the railroad vehicle 100 (structure 1). (Vertical direction) is the Z direction. Hereinafter, it may be simply referred to as X direction, Y direction, and Z direction.
[0014]

FIG. 1 is a side view of the railroad vehicle according to the first embodiment of the present invention. FIG. 2 is a bottom perspective view of the vehicle structure of the first embodiment of the present invention.
[0015]
The railroad vehicle 100 includes a structure 1 and a trolley 2 that supports the structure 1 under the structure 1.
[0016]
The structure 1 includes an underframe 10 forming a floor surface, side structures 30 arranged at both ends in the width direction of the underframe 10, a wife structure 40 arranged at both ends in the longitudinal direction of the underframe, and side structures. It is a hexahedral structure composed of 30 and a roof structure 50 arranged above the wife structure 40.
[0017]
The underframe 10 includes a side beam 11, an end beam 12, a pillow beam 13, and a middle beam 19. The side beams 11 are provided at both ends of the underframe 10 in the width direction (Y direction) along the longitudinal direction (X direction). The end beam 12 connects both ends of the side beam 11 in the longitudinal direction (X direction). The pillow beam 13 is provided at a position at a predetermined distance from the longitudinal direction (X direction) end portion of the structure 1 along the width direction (Y direction) of the underframe 10. The middle beam 19 is arranged along the longitudinal direction (X direction) of the structure 1 so as to connect the end beam 12 and the pillow beam 13.
[0018]
The trolley 2 is provided under the pillow beam 13 so as to be rotatable with respect to the underframe 10 around the center pin 14 along the Z direction in the horizontal plane. The trolley 2 includes a trolley frame 3 and wheels 6 fixed to both ends of an axle rotatably held with respect to the trolley frame 3. The trolley 2 supports the underframe 10 via air springs 4 provided on both sides in the Y direction near the center in the X direction.
[0019]
The center pin 14 provided on the lower surface of the pillow beam 13 along the vertical direction of the structure 1 is connected to the trolley frame 3. When accelerating and decelerating the vehicle, a load in the vehicle front-rear direction is transmitted from the trolley 2 to the pillow beam 13 via the center pin 14.
[0020]
FIG. 3 is a perspective view showing the appearance of the pillow beam according to the first embodiment of the present invention on the upper surface side. The pillow beam 13 has a structure formed by joining four profile members 15A, 15B, 15C, and 15D side by side in the X direction. These profiles are extruded profiles and have a hollow portion inside. The extrusion direction is the Y direction.
[0021]
The profile pieces 15B and 15C at the center in the X direction form upper projecting portions 25 protruding above the upper surfaces of the profile members 15A and 15D at both ends along the Y direction. At the center of the upper protrusion 25 in the Y direction, a central notch 26 is formed by cutting a part of the upper protrusion 25 downward. The upper surface of the notched portion is formed lower than the upper surface of the upper protruding portion 25 via the step 21, and is at the same height as or close to the upper surfaces of the profiles 15A and 15D at both ends. The profile members 15A and 15D at both ends are formed so as to project downward. Both ends in the X direction of the profiles 15A and 15D have side cutouts 27 in which portions other than the both ends in the Y direction are cut out for the entire side surface.
[0022]
FIG. 4 is a perspective view showing the appearance of the lower surface side of the pillow beam according to the first embodiment of the present invention. FIG. 4 is a diagram showing a state in which the top and bottom are turned upside down with respect to FIG.
[0023]
The profile members 15B and 15C at the center in the X direction are provided with receiving portions 28 on both sides in the Y direction on the lower surface side. The receiving portion 28 is formed by notching upward from both ends in the Y direction within a predetermined range. The notch of the receiving portion 28 maintains its strength in the Y direction so as not to overlap with the central notch 26. The receiving portion 28 can receive the air spring 4, and the thickness in the Z direction can be reduced by the amount of the notch.
[0024]
The profiles 15A and 15D at both ends in the X direction are provided with fastening portions 22 at both ends in the Y direction. The fastening portion 22 projects outward in the Y direction from the end portions of the profiles 15B and 15C in the Y direction. Therefore, as the profile 15A and 15D, a profile longer than the profile 15B and 15C is used. In the shapes 15A and 15D, the fastening portion 22 is configured to project toward the lower surface side, and the other portions do not project to the lower surface side.
[0025]
FIG. 5 is an enlarged perspective view showing the joining of the profile of the pillow beam according to the first embodiment of the present invention. FIG. 5 shows a view cut along the XX plane at the center of the pillow beam 13 in the longitudinal direction (Y direction) for explanation.
[0026]
The profile 15A and the profile 15B, the profile 15B and the profile 15C, and the profile 15C and the profile 15D are joined at the welded portion 16, respectively. These joints are welded along the Y direction by abutting the face plates of the respective profiles. The joining range of the profile 15A and the profile 15D is a certain range from the upper surface to the lower side. The joining range of the profile 15B and the profile 15C is a certain range from the lower surface to the upper side.
[0027]
FIG. 6 is an enlarged perspective view showing a fastening portion of the pillow beam according to the first embodiment of the present invention. FIG. 5 is a diagram showing a state in which the top and bottom are turned upside down with respect to FIG. 3 in the same manner as in FIG.
[0028]
The fastening portion 22 is formed by a portion of the second face plate 15b in the middle of the Z direction of the profile 15A. A notch 24 is formed by cutting out a portion below the second face plate 15b in the Z direction (corresponding to the upper side in FIG. 6) within a predetermined range from the end portion in the Y direction. As a result, the lower portion of the second face plate 15b is vacant in a predetermined range from the end portion in the Y direction, and it is possible to easily arrange bolts and nuts and tighten them. Further, the notches 24 are formed on both sides of the inner rib 15e at the center in the X direction. As a result, the inner rib 15e in the center and a part of the lower first face plate 15a connected to the rib 15e can be left, and the strength can be maintained. The fastening portion 22 other than FIG. 6 has the same configuration.
[0029]
FIG. 7 is a diagram showing a cross section taken along the line AA of FIG. As shown in FIG. 7, the pillow beam 13 is installed between the trolley 2 and the underframe 10.
[0030]
Space 23 is a space provided between the underframe 10 and the pillow beam 13. By forming the above-mentioned central notch 26 in the pillow beam 13, the space 23 can be expanded. This space 23 can be used as a space for arranging various members and parts such as pipes, ducts, sensors, and vibration-proof materials. Further, by adjusting the size of the step 21 while considering the balance with the strength, it is possible to make the space 23 of various sizes.
[0031]
The fastening portion 22 of the pillow beam 13 is a portion for fixing the side beam 11 to the pillow beam 13 with a bolt or the like. The fastening portion 22 is located near both ends in the Y direction of the structure 1 and is fixed to the side beams 11 at both ends in the Y direction. The receiving portion 28 of the pillow beam 13 receives the upper side of the air spring 4 of the trolley 2.
[0032]
Here, the vertical load is transmitted from the trolley 2 to the pillow beam 13 via the air spring 4. At this time, the pillow beam 13 is subjected to bending stress between the side beam 11 and the air spring 4, and bending deformation occurs. However, the bending rigidity of the profile 15 causes these to be bent.It is possible to reduce it. Further, a moment load is transmitted from the trolley 2 to the pillow beam 13 via the center pin 14, and torsional deformation occurs, which can be reduced by the torsional rigidity of the profile 15.
[0033]
FIG. 8 is a perspective view of the unprocessed profile used in the pillow beam of the first embodiment of the present invention. FIG. 9 is a cross-sectional view taken along a plane perpendicular to the longitudinal direction of the unprocessed profile used in the pillow beam of the first embodiment of the present invention.
[0034]
As the above-mentioned profile 15A, 15B, 15C, 15D, the profile 15 having the same cross-sectional shape can be used before machining by machining or the like. The profile 15 is formed while maintaining the cross-sectional shape shown in FIG. 9 with the Y direction as the longitudinal direction. As the profile 15, an aluminum profile having a multi-layer structure extruded along the width direction (Y direction) of the structure 1 is applied.
[0035]
As shown in FIG. 9, the profile 15 has a three-layer structure in which three face plates, a first face plate 15a, a second face plate 15b, and a third face plate 15c, are arranged in parallel in the Z direction from the upper side. The lengths of the second face plate 15b and the third face plate 15c in the X direction are the same, and the length of the first face plate 15a in the X direction is shorter than that of the second face plate 15b and the third face plate 15c. Further, the distance between the first face plate 15a and the second face plate 15b in the Z direction is larger than the distance between the second face plate 15b and the third face plate 15c.
[0036]
The first face plate 15a and the second face plate 15b are connected by outer ribs 15d on both sides on the outer side in the X direction and two inner ribs 15e on the inner side in the X direction. The outer rib 15d and the inner rib 15e are inclined in the direction in which the outer side in the X direction narrows from the second face plate 15b toward the first face plate 15a. As a result, the cross section between the first face plate 15a and the second face plate 15b has a trapezoidal shape as a whole. If the cross section has a trapezoidal shape, it will be easy to process by machining or the like.
[0037]
The second face plate 15b and the third face plate 15c are connected by outer ribs 15f on both sides on the outer side in the X direction and two inner ribs 15g on the inner side in the X direction. The outer rib 15f and the inner rib 15g are formed perpendicular to the second face plate 15b and the third face plate 15c. As a result, the cross section between the second face plate 15b and the third face plate 15c becomes a rectangular shape as a whole.
[0038]
FIG. 10 is a diagram for explaining a connection state of the profile used in the pillow beam of the first embodiment of the present invention. Although FIG. 10 shows the connection by the profile 15 before processing, in reality, the connection can be made after processing by machining or the like first.
[0039]
As shown in FIG. 10, a pillow beam 13 can be formed by processing and joining using a profile 15 having the same cross-sectional shape. The shapes 15A and 15D are connected to the shapes 15B and 15C by reversing the vertical orientation of the shapes 15. In the portions of the shapes 15B and 15C, the shapes 15 are combined so as to protrude above the connection range P, and in the parts of the shapes 15A and 15D, the shapes 15 protrude below the connection range P. ..
[0040]
The central notch 26 described with reference to FIG. 3 is formed by cutting out the first face plate 15a, the outer rib 15d, and the inner rib 15e of the shape material 15 corresponding to the shape material 15B and 15C.
[0041]
The receiving portion 28 described with reference to FIG. 4 is formed by cutting out the third face plate 15c, the outer rib 15f, and the inner rib 15g of the profile 15 corresponding to the profiles 15B and 15C. The outer ribs 15f of the profiles 15B and 15C located on the profiles 15A and 15D may be left uncut to increase the strength.
[0042]
The side notch portion 27 described with reference to FIG. 3 is formed by cutting out the profile 15 corresponding to the profiles 15A and 15D. The central portion in the Y direction is formed by cutting out a portion other than the outer rib 15f on the connection side with the profiles 15B and 15C and the portions of the second face plate 15b and the third face plate 15c close to the rib 15f.
[0043]
The third face plate 15c and the second face plate 15b of the profile 15A are joined to the second face plate 15b and the third face plate 15c of the profile 15B, respectively. The second face plate 15b and the third face plate 15c of the profile 15B are joined to the second face plate 15b and the third face plate 15c of the profile 15C, respectively. The second face plate 15b and the third face plate 15c of the profile 15C are joined to the third face plate 15c and the second face plate 15b of the profile 15D, respectively.
[0044]
FIG. 11 is a perspective view showing a state before connection of each profile in the pillow beam of the first embodiment of the present invention. For the profile 15A, 15B, 15C, and 15D, the profile 15 shown in FIGS. 8 and 9 is machined. The longitudinal directions of the profiles 15A, 15B, 15C, and 15D are all the same Y direction.
[0045]
The profile 15B and the profile 15C can be processed into the same shape. Shaving or the like is performed so as to form the central notch 26 and the receiving portion 28 described above. The profile 15A and the profile 15D can be used by arranging them symmetrically after being processed into the same shape. Shaving or the like is performed so as to form the side notch 27 and the notch 24.
[0046]
Then, the processed profiles 15A, 15B, 15C, and 15D are joined side by side in the X direction. The profiles 15B and 15C have the same position in the Y direction. The profile pieces 15A and 15D are joined side by side with both ends in the Y direction protruding from the shape members 15B and 15C only at the fastening portion 22.
[0047]
(effect)
As described above, the pillow beam 13 can be made into a lightweight and rigid pillow beam 13 by using the profile 15 which is an extruded profile. Especially as an aluminum profile, it can be made lighter and more rigid. Further, since it is a multi-layered profile 15, the rigidity can be improved. Then, by processing the profile 15, a space 23 can be secured between the underframe 10 and the pillow beam 13, and various members and parts such as pipes, ducts, sensors, and vibration-proof materials can be arranged. It will be possible.
[0048]
The pillow beam 13 can be made into a lightweight and rigid pillow beam 13 by processing a profile 15 having the same cross-sectional shape and joining them in combination to reduce the cost. At that time, by devising a method of combining the profile members 15, it is possible to maintain the function of the pillow beam 13 high, such as ensuring rigidity and securing space. By sharing the profile 15 with the profile used in other parts of the structure 1 of the railway vehicle 100, the number of parts can be reduced and the cost of the vehicle can be reduced.
[0049]
The pillow beam 13 can be securely fixed to the side beam 11 by forming the fastening portion 22. Further, by securing a predetermined connection range P (FIG. 10) and joining with a plurality of face plates, it is possible to surely join the profiles 15 to each other and to increase the strength of the entire pillow beam 13. .. Further, by providing the receiving portion 28, it is possible to secure the height of the air spring 4 in the vertical direction without raising the position of the underframe 10.
[0050]

FIG. 12 is an enlarged perspective view showing the configuration of the pillow beam according to the second embodiment of the present invention. FIG. 12 shows a view cut along the XX plane at the center of the pillow beam 13'in the longitudinal direction (Y direction) for explanation. In the second embodiment, the points different from those in the first embodiment are mainly described, the same parts are designated by the same reference numerals, and the same description is omitted unless otherwise specified.
[0051]
The pillow beam 13'of Example 2 has a configuration in which a reinforcement 17 is additionally provided to the pillow beam 13 of Example 1. The reinforcement 17 is a plate-shaped member that is reinforced by joining to the upper surface of the profile 15. For example, it is provided along the Y direction between the ribs 18 (the remaining portion of the outer rib 15d and the inner rib 15e) on the upper surface of the central notch 26 of the profiles 15B and 15C. At this time, the reinforcement 17 is reinforced with a length of the central notch 26 in the Y direction or longer.
[0052]
In the second embodiment, in addition to the effect of the first embodiment, by using the reinforcement 17, the bending rigidity of the pillow beam 13'is increased, and the bending deformation of the pillow beam 13'when receiving a bending moment can be reduced. It will be possible. In particular, the bending rigidity can be effectively increased by reinforcing the vicinity of the central notch 26 where the thickness becomes thin.
[0053]

FIG. 13 is a cross-sectional view cut along a plane perpendicular to the longitudinal direction of the profile before processing used in the pillow beam of the third embodiment of the present invention. FIG. 14 is a diagram for explaining a connection state of the profile used in the pillow beam of the third embodiment of the present invention. In the third embodiment, the points different from those in the first embodiment are mainly described, the same parts are designated by the same reference numerals, and the same description is omitted unless otherwise specified. FIG. 13 shows the connection by the profile 15'before processing, but in reality, the connection can be made after processing by machining or the like first.
[0054]
In Example 3, the profile 15'has a five-layer structure in which two face plates (two layers) are added to the lower side of the profile 15 of Example 1. Specifically, a fourth face plate 15h and a fifth face plate 15i that are parallel to the third face plate 15c and have the same size are added to the lower side of the third face plate 15c. The space between the third face plate 15c and the fourth face plate 15h is connected to the outer rib 15j and the inner rib 15k. The space between the fourth face plate 15h and the fifth face plate 15i is connected to the outer rib 15m and the inner rib 15n. These ribs have the same shape as the outer ribs 15f and the inner ribs 15g. Further, the distance between the second face plate 15b, the third face plate 15c, the fourth face plate 15h, and the fifth face plate 15i in the z direction is the same.
[0055]
As shown in FIG. 14, the profile 15A'and 15D' are connected to the profile 15B'and 15C'with the profile 15 turned upside down to form a pillow beam 13 ″. The profile 15A', 15B', 15C', and 15D'are joined by four face plates of a second face plate 15b, a third face plate 15c, a fourth face plate 15h, and a fifth face plate 15i. In the profile 15A'and the profile 15B', and the profile 15C'and the profile 15D', the second face plate 15b and the fifth face plate 15i, and the third face plate 15c and the fourth face plate 15h are joined to each other. The profile 15B'and the profile 15C'are joined together with the same face plate.
[0056]
In the third embodiment, in addition to the effect of the first embodiment, the length of the connection range P in the Z direction can be made longer than that of the first embodiment, and the number of face plates to be connected can be increased. As a result, the bending rigidity and the torsional rigidity of the profile 15 ″ are increased, and the bending deformation and the torsional deformation of the pillow beam 13 ″ when receiving the bending moment and the torsional moment can be reduced.
[0057]
The present invention is not limited to the above-described embodiment, but includes various modifications. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations. Further, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to add / delete / replace a part of the configuration of each embodiment with another configuration.
[0058]
For example, it is also possible to attach a member that receives a load from the yaw damper attached to the trolley 2 to the pillow beams 13, 13 ″, 13 ″.
[0059]
In addition, the number of shapes used for the pillow beam showed four examples. The number of shaped materials may be changed and applied, for example, two or more, three or more, four or more, in consideration of the shape of the shaped material or the pillow beam.
[0060]
Further, the number of face plates for joining each profile is shown in Example 1 as 2 sheets and in Example 3 as 4 sheets. However, the number of face plates to be joined is not limited to this, and it is possible to increase the number of face plates to be joined, for example, 2 or more, 3 or more, 4 or more, and increase the rigidity.
[0061]
Further, the reinforcement 17 of the second embodiment may be applied to a place other than the central notch 26 to reinforce the reinforcement 17.
Description of the sign
[0062]
1 ... structure, 2 ... trolley, 3 ... trolley frame, 4 ... air spring, 10 ... underframe, 11 ... side beam, 12 ... end beam, 13, 13', 13'' ... pillow beam, 14 ... center pin, 15, 15A, 15B, 15C, 15D, 15', 15A'15B', 15C', 15D' ... Shape material, 15a ... 1st face plate, 15b ... 2nd face plate, 15c ... 3rd face plate, 15h ... 4th face plate , 15i ... 5th face plate, 15d, 15f, 15j, 15m ... outer rib, 15e, 15g, 15k, 15n ... inner rib, 16 ... welded part, 17 ... reinforcement, 18 ... rib, 19 ... middle beam, 21 ... step , 22 ... Fastening part, 23 ... Space, 24 ... Notch, 25 ... Upper protrusion, 26 ... Central notch, 27 ... Side notch, 28 ... Receiving part, 30 ... Side structure, 40 ... Wife structure, 50 ... roof structure, 100 ... railroad vehicle, X ... longitudinal direction, Y ... width direction, Z ... height direction
The scope of the claims
[Claim 1]
It is a pillow beam structure provided in the underframe that constitutes the floor of the structure of the railway vehicle.
It is composed of a plurality of multi-layered profiles whose width direction is the extrusion direction of the structure.
The plurality of profiles are formed by a profile having a region in which a part of the underframe side is cut out at the center in the width direction of the structure and a part of the layers cut out at both ends in the width direction of the structure. Containing a profile with a fastening
A pillow beam structure of a railroad vehicle characterized in that the side beam of the underframe is fixed at the fastening portion.
[Claim 2]
In the pillow beam structure according to claim 1,
The plurality of profiles are the pillow beam structure of a railroad vehicle, characterized in that the profiles having the same cross-sectional shape are machined.
[Claim 3]
In the pillow beam structure according to claim 2,
The plurality of profiles are joined side by side in the longitudinal direction of the structure, which is a pillow beam structure of a railway vehicle.
[Claim 4]
In the pillow beam structure according to claim 3,
Of the plurality of profiles, the profile located inside the longitudinal direction of the structure has a portion protruding upward from the joint portion, and the profile located outside the longitudinal direction of the structure has a portion protruding above the joint portion. The pillow beam structure of a railroad vehicle, which is characterized by having a portion protruding downward.
[Claim 5]
In the pillow beam structure according to claim 1,
The pillow beam structure of a railroad vehicle characterized by arranging reinforcement on the upper surface of the profile.
[Claim 6]
In the pillow beam structure according to claim 1,
A railroad vehicle pillow beam structure characterized in that the shape of the cross section perpendicular to the longitudinal direction of the profile includes a substantially trapezoidal portion.
[Claim 7]
In the pillow beam structure according to claim 1,
The profile of the railroad vehicle is characterized in that the profile has the same cross-sectional shape as the profile of the profile used in the structure other than the pillow structure.
[Claim 8]
A railroad vehicle having the pillow beam structure according to claim 1.