External diaphragm for railway vehicle

Abstract

To provide an outer hood for a railway vehicle which has a simple structure, is rich in flexibility and rigidity, and can be used for a long period of time.SOLUTION: A connection part 103 between a front side vehicle body 101 and a rear side vehicle body 102 of a railway vehicle 100 is continuously covered from the outside from a roof to right and left side surfaces, and a plurality of hood bodies 111 are arranged in the outer peripheral direction surrounding the vehicle 100. The front side and the rear side of the awning body 111 are the outer awning 110 for the railway vehicle fixed to the front side vehicle body 101 and the rear side vehicle body 102, respectively, and the awning body 111 is a housing made of a rubber-like elastic body, opened on the back surface side, and including a front surface 112, a front surface 113, a rear surface 114, a first surface 115, and a second surface 116, and is formed by integrally molding a plurality of corrugated middle ribs 131,132 vertically protruding from the front surface 112 to the vehicle interior side between the first surface 115 and the second surface 116.SELECTED DRAWING: Figure 19

Description

[Technical Field]

[0001] The present invention relates to an outer hood for a railway vehicle, and more particularly to an outer hood that covers from the outside a joint between two carbodies of a railway vehicle. [Background technology]

[0002] 10 and 11, a connecting portion 103 between a front car body 101 and a rear car body 102 of a railway vehicle 100 is continuously covered from the roof to the left and right sides with an outer hood 10 to suppress noise generation. Here, the front-to-rear direction of the vehicle 100 is defined as the X direction, the outer circumferential direction is defined as the Y direction, and the direction from inside to outside of the vehicle 100 perpendicular to the X and Y directions is defined as the Z direction.

[0003] The outer canopy 10 has a plurality of canopy bodies 11 arranged in the outer circumferential direction (Y direction) surrounding the vehicle 100, and the front and rear sides of the canopy bodies 11 are fixed to a front vehicle body 101 and a rear vehicle body 102, respectively. In particular, the outer hood 10 used on Shinkansen trains is required to have flexibility to accommodate the tensile, compressive, and shear behavior of the car body, as well as rigidity to accommodate differential pressure at tunnel entrances and exits.Conventionally, as shown in Figures 12 and 13, a hood body 11 is known that is composed of an outer sheet 12, an inner sheet 13, and a polymer synthetic sponge body 14 that is arranged between and adhered to both sheets 12, 13 (see, for example, Patent Document 1).

[0004] As shown in Figure 12, the polymer synthetic sponge body 14 has a concave curved surface on the side facing the inner sheet 13, and is arranged at intervals in the circumferential direction (Y direction) as shown in Figure 13. The outer sheet 12 is bonded to the polymer synthetic sponge body 14 via a sponge sheet 15 provided on its back surface. The outer sheet 12 and the inner sheet 13 each have a knitted base material, and one surface of the outer sheet 12 and the inner sheet 13 is coated with an elastomer that has excellent stretch and recovery properties.

[0005] 13, the hood bodies 11 adjacent to each other in the circumferential direction (Y direction) are connected by pulling the excess length 16 of the outer sheet 12 into the vehicle interior and gluing and sewing them together. The hood bodies 11 are firmly screwed to the front vehicle body 101 and the rear vehicle body 102 via metal plates (not shown). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-268604 Summary of the Invention [Problem to be solved by the invention]

[0007] However, in the outer hood 10 shown in the conventional example (FIGS. 12 and 13), the outer sheet 12 and the inner sheet 13 are knitted fabrics coated with elastomer, and therefore have a problem of poor weather resistance. As a result, on a Shinkansen train, cracks form on the coated surface due to expansion and contraction during travel, and dirt adheres to the cracks, causing discoloration and an unsightly appearance, making it necessary to replace the outer hood 10 in a short period of time.

[0008] Furthermore, the multiple hood bodies 11 that make up the outer hood 10 are made up of an outer sheet 12, an inner sheet 13, a polymer synthetic sponge body 14, and a sponge sheet 15, which means that there are a large number of parts and the overall structure is complex. Furthermore, the Shinkansen requires flexibility to accommodate the tensile, compressive, and shear behavior of the car body at a speed of 300 km / h, as well as rigidity to cope with differential pressures at tunnel entrances and exits, so if there are a large number of parts, the processing method for joining them together effectively becomes complex.

[0009] Furthermore, between adjacent hood bodies 11, the excess length 16 of the outer sheet 12 is pulled into the inside of the vehicle and connected (joined) by gluing and sewing together, so when subjected to load in harsh environments, the connection (joining) part is prone to damage such as peeling over time.

[0010] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an outer hood for a railway vehicle which has a simple structure, is highly flexible and rigid, and can be used for a long period of time. [Means for solving the problem]

[0011] In order to achieve the above object, the outer hood for a railway vehicle of the present invention covers a connecting portion (103) between a front car body (101) and a rear car body (102) of a railway vehicle (100) continuously from the roof to the left and right sides from the outside, and is configured such that a plurality of hood bodies (111) are arranged in the outer peripheral direction surrounding the vehicle (100), and the front and rear sides of the hood bodies (111) are fixed to the front car body (101) and the rear car body (102), respectively. The hood body (111) is made of a rubber-like elastic material, When the front-rear direction of the vehicle (100) is defined as the X direction, the outer circumferential direction is defined as the Y direction, and the direction from inside to outside of the vehicle (100) perpendicular to the X direction and the Y direction is defined as the Z direction, The hood body (111) is a housing having an opening on the rear side facing the vehicle interior in the Z direction, and including a front surface (112), a front surface (113) and a rear surface (114) at both ends in the X direction, and a first surface (115) and a second surface (116) at both ends in the Y direction, A plurality of center ribs (131, 132) are integrally formed between the first surface (115) and the second surface (116) and protrude perpendicularly from the surface (112) toward the interior of the vehicle.

[0012] In addition, the present invention is characterized in that the adjacent hood bodies (111, 111) are not connected to each other.

[0013] Furthermore, the present invention is characterized in that, among the plurality of middle ribs (131, 132), the first middle rib (131) located closer to the first surface (115) than the midpoint between the first surface (115) and the second surface (116) has a central portion curved closer to the second surface (116) than both ends, and the second middle rib (132) located closer to the second surface (116) than the midpoint has a central portion arched closer to the first surface (115) than both ends.

[0014] The present invention is also characterized in that the upper surface (112a) of the surface (112) is linear when viewed from the Z direction, and the first surface (115) is curved in the same direction as the first central rib (131) relative to the surface (112), and the second surface (116) is arch-shaped and curved in the same direction as the second central rib (132).

[0015] The present invention is also characterized in that the front surface (112) has a central portion curved toward the back surface, and the first surface (115), the second surface (116), and the plurality of middle ribs (131, 132) are curved so that the amount of protrusion from the front surface (112) gradually increases from the central portion toward both ends when viewed from the Y direction. Therefore, the central portions of the middle ribs (131, 132) are approximately parallel to the front surface (112).

[0016] The present invention is also characterized in that small ribs (150) are provided between the plurality of middle ribs (131, 132), protruding toward the vehicle interior and having a height smaller than that of the middle ribs (131, 132).

[0017] The present invention is also characterized in that a cover portion (120) for covering the space between the adjacent hood bodies (111, 111) is provided on the interior side of the hood bodies (111, 111).

[0018] The present invention is also characterized in that a skirt portion (125) covering the space between the adjacent hood bodies (111, 111) is integrally formed on the vehicle interior side of one of the adjacent hood bodies (111, 111).

[0019] The present invention is also characterized in that mounting brackets (201) are provided on the inside of the front (113) and rear (114) of the hood body (111), respectively, and the hood body (111) is sandwiched between the vehicle body (101, 102) and the mounting brackets (201).

[0020] In addition, the present invention is characterized in that the plurality of middle ribs (131A, 132A) are wave-shaped.

[0021] The present invention is also characterized in that the small rib (150A) has a wave shape.

[0022] In addition, the present invention is characterized in that the small ribs (150B) are a plurality of linear bodies inclined obliquely with respect to the X direction.

[0023] The present invention is also characterized in that a thin portion (155) is provided at the base of each of the small ribs (150, 150A, 150B).

[0024] The present invention is also characterized in that a curved surface portion (157) is provided at the base of the small rib (150, 150A, 150B), and the radius of curvature (R) of the curved surface portion (157) is smaller than the width (t) of the small rib (150, 150A, 150B).

[0025] The present invention is also characterized in that the bases of the small ribs (150, 150A, 150B) are edged.

[0026] It should be noted that symbols in parentheses indicate corresponding elements or matters described in the drawings and in the detailed description to be described later. [Effects of the Invention]

[0027] According to the outer canopy for railway vehicles of the present invention, the front and rear sides of the multiple canopy bodies that make up the outer canopy, which covers the connecting portion between the front and rear car bodies of the railway vehicle from the outside, are fixed to the front and rear car bodies, respectively, and the canopy bodies are open on the back side and are a housing consisting of a surface, front and rear surfaces, and a first and second surface, with multiple middle ribs that protrude from the surface toward the inside of the car between the first and second surfaces being integrally molded, resulting in an extremely simple structure compared to conventional examples consisting of multiple parts. Furthermore, the hood body is made of a rubber-like elastic material and has a plurality of central ribs integrally molded inside, so that it has a simple structure but is highly flexible and rigid, and can be used for a long period of time.

[0028] Furthermore, according to the present invention, adjacent hood bodies are not connected to each other, so that damage such as peeling off of the connection parts due to loads being applied in harsh environments, as was the case with the conventional example, does not occur.

[0029] Furthermore, according to the present invention, the first middle rib is curved toward the second surface, and the second middle rib is arched toward the first surface, and further, the first surface and the second surface are also arched, thereby increasing rigidity in the Z direction and pre-regulating the deflection direction, resulting in excellent durability.

[0030] According to the present invention, the first surface, the second surface, and the plurality of center ribs are curved so that the amount of protrusion from the surface gradually increases from the center toward both ends when viewed from the outer circumferential direction (Y direction), which increases the strength of both ends of the center rib and further improves rigidity. Furthermore, since the center of the surface itself is curved toward the back side, the bending direction is restricted, resulting in excellent durability.

[0031] Furthermore, according to the present invention, small ribs that protrude toward the vehicle interior and are smaller in height than the central ribs are provided between the multiple central ribs, thereby further increasing rigidity compared to when no small ribs are provided.

[0032] Furthermore, according to the present invention, the cover portion that covers the space between adjacent top bodies is provided on the inside of the top body, which provides a good external appearance.

[0033] Furthermore, according to the present invention, a skirt portion is provided to cover the space between adjacent hood bodies, which provides a good appearance. Furthermore, since the skirt portion is integrally molded on the interior side of one of the adjacent hood bodies, it is less likely to come off than a cover portion and is also superior in strength.

[0034] In addition, according to the present invention, mounting brackets are provided on the inside of the front and rear surfaces of the hood body, and the hood body is sandwiched between the vehicle body and the mounting brackets, so that the hood body can be attached to the vehicle body in a stable state with sufficient strength.

[0035] Furthermore, according to the present invention, the multiple middle and small ribs are wavy, which allows for a longer overall length compared to curved arches. As a result, even if the surface of the hood expands significantly as the hood expands and contracts, the middle and small ribs have enough room to stretch and do not expand as much as the surface, which slows the progression of cracks in the ribs. Therefore, it is possible to obtain an outer cover for a railway vehicle that is resistant to cracks.

[0036] Furthermore, according to the present invention, the small ribs are a plurality of linear bodies inclined obliquely with respect to the X direction (front-to-rear direction of the vehicle), so that cracks can be guided in the direction in which the linear small ribs extend, preventing cracks from progressing directly in the Y direction (outer circumferential direction).

[0037] According to the present invention, stress may be concentrated in the X direction by providing a thin portion or a curved portion at the base of the small rib. Conversely, stress may be concentrated in the X direction by simply forming an edge at the base of the small rib without providing a curved portion. In this way, even if a crack occurs, the crack will be guided only in the X direction, and its progression in the Y direction will be delayed. If a curved portion is provided at the base, it is preferable that the radius of curvature be smaller than the width of the small rib. This allows for the same reason as when a thin portion is provided, that is, even if a crack occurs, its progression in the Y direction will be delayed. [Brief explanation of the drawings]

[0038] [Figure 1] 1 is a perspective view of a hood body constituting an outer hood for a railway vehicle according to an embodiment of the present invention, seen from the back side. [Figure 2] 1 is a perspective view of a top body constituting an outer cover for a railway vehicle according to an embodiment of the present invention, seen from the front side. [Figure 3] FIG. 2 is a front view of the hood body shown in FIG. [Figure 4] FIG. 2 is a plan view of the hood body shown in FIG. [Figure 5] FIG. 2 is a rear view of the hood body shown in FIG. [Figure 6] FIG. 2 is a bottom view of the hood body shown in FIG. [Figure 7] FIG. 2 is a left side view of the hood body shown in FIG. [Figure 8] 12 is an enlarged cross-sectional view taken along line AA in FIG. 11, showing a top body that constitutes an outer cover for a railway vehicle according to an embodiment of the present invention. FIG. [Figure 9] 12 is an enlarged cross-sectional view taken along line BB in FIG. 11, showing a hood body that constitutes an outer hood for a railway vehicle according to an embodiment of the present invention. FIG. [Figure 10] 1 is a schematic longitudinal sectional view showing a state in which an outer hood for a railway vehicle is attached to a vehicle. [Figure 11] FIG. 11 is a partially enlarged side view of the outer hood for a railway vehicle shown in FIG. [Figure 12] FIG. 12 is an enlarged cross-sectional view taken along line AA in FIG. 11, showing a hood body constituting an outer hood for a railway vehicle according to a conventional example. [Figure 13] FIG. 12 is an enlarged cross-sectional view taken along line BB in FIG. 11, showing a hood body constituting an outer hood for a railway vehicle according to a conventional example. [Figure 14] 1 is a perspective view of a state in which a plurality of hood bodies constituting an outer hood for a railway vehicle according to an embodiment of the present invention are arranged, as seen from the back side. [Figure 15] 10 is a perspective view of another outer cover body for a railway vehicle according to an embodiment of the present invention, seen from the back side. FIG. [Figure 16] 10 is a perspective view of another outer hood body constituting an outer hood for a railway vehicle according to an embodiment of the present invention, as viewed from the front side. FIG. [Figure 17] FIG. 2 is an enlarged perspective view showing the mounting plate 201 shown in FIG. [Figure 18] 18 is an enlarged cross-sectional view showing a fixing method using the mounting plate 201 shown in FIG. 17. FIG. [Figure 19] 10 is a front view showing another embodiment of a hood body constituting an outer hood for a railway vehicle according to an embodiment of the present invention. FIG. [Figure 20] 1A and 1B show another embodiment of a hood body constituting an outer hood for a railway vehicle according to an embodiment of the present invention, in which (a) is a cross-sectional view taken along line CC in (b), and (b) is a front view. [Figure 21] 1A and 1B show another embodiment of a hood body constituting an outer hood for a railway vehicle according to an embodiment of the present invention, in which (a) is a cross-sectional view taken along line DD in (b), and (b) is a front view. [Figure 22] 10 is an enlarged cross-sectional view showing a modified example of the small rib and its surroundings formed on the hood body that constitutes the outer hood for a railway vehicle according to an embodiment of the present invention. FIG. [Figure 23] 10 is an enlarged cross-sectional view showing a modified example of the small rib and its surroundings formed on the hood body that constitutes the outer hood for a railway vehicle according to an embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0039] An outer hood for a railway vehicle according to an embodiment of the present invention will be described with reference to Figures 1 to 11. Note that the same parts as those shown in the conventional example are given the same reference numerals.

[0040] As shown in Figures 10 and 11, the outer canopy 110 for a railway vehicle in an embodiment of the present invention covers the connecting portion 103 between the front body 101 and the rear body 102 of the railway vehicle 100 continuously from the outside, from the roof to the left and right sides, and multiple canopy bodies 111 are arranged in a row in the outer circumferential direction surrounding the vehicle 100, with the front side of the canopy body 111 fixed to the front body 101 and the rear side of the canopy body 111 fixed to the rear body 102.

[0041] Although the railcar 100 according to the embodiment of the present invention will be described using a Shinkansen (registered trademark) as an example, the present invention is also applicable to other general railcars. Here, the description will be given assuming that the front-rear direction of the vehicle 100 is the X direction, the outer circumferential direction surrounding the vehicle 100 is the Y direction, and the direction inside and outside the vehicle 100 perpendicular to the X and Y directions is the Z direction.

[0042] As shown in Fig. 1, the top hood body 111 is a housing that is open on the back side facing the vehicle interior in the Z direction, and is made up of a front surface 112, a front surface 113 and a rear surface 114 at both ends in the X direction, and an upper first surface 115 and a lower second surface 116 at both ends in the Y direction. As shown in Fig. 9, the top hood bodies 111, 111 adjacent to each other in the Y direction are not directly connected and basically do not touch each other. Here, a gap S is provided between the top hood bodies 111, 111. The top hood bodies 111, 111 may be in a so-called zero-touch state, where they are barely in contact with each other, or they may be in partial or full contact, but they are not directly connected.

[0043] A plurality of, here two, middle ribs 131, 132 are provided between the first surface 115 and the second surface 116. The middle ribs 131, 132 consist of a first middle rib 131 located on the first surface 115 side of a midline CL that indicates the midpoint between the first surface 115 and the second surface 116, and a second middle rib 132 located on the second surface 116 side. They protrude perpendicularly from the surface 112 toward the vehicle interior, and both ends are joined to the front surface 113 and the rear surface 114, respectively.

[0044] 1 and 3, the first central rib 131 has an arch shape with its central portion curved closer to the second surface 116 than both ends, and the second central rib 132 has an arch shape with its central portion curved closer to the first surface 115 than both ends. The upper surface 112a and the lower surface 112b of the surface 112 are horizontal. Furthermore, the upper surface 112a and the lower surface 112b of the surface 112 are linear when viewed from the Z direction, and with respect to the surface 112, the first surface 115 is arched and curved in the same direction as the first middle rib 131, and the second surface 116 is arched and curved in the same direction as the second middle rib 132. In this embodiment, the first surface 115 and the first central rib 131 have the same curvature in the Y direction, and the second surface 116 and the second central rib 132 have the same curvature in the Y direction, and the first surface 115 and the first central rib 131 are arranged in line symmetry with the second surface 116 and the second central rib 132 with respect to the midline CL that indicates the midpoint between the first surface 115 and the second surface 116. However, the degree of curvature of the first surface 115 and the first central rib 131 or the second surface 116 and the second central rib 132 may be changed, or the line symmetry relationship may not be maintained. However, even if the degree of curvature of the first surface 115 and the first central rib 131 and the second surface 116 and the second central rib 132 is changed, it is preferable to make the degree of curvature of the first surface 115 and the second surface 116 and the first central rib 131 and the second central rib 132 the same and line symmetry, as this allows for a balanced response to stress from all directions.

[0045] 3, 4, and 6, the first surface 115, the second surface 116, the first central rib 131, and the second central rib 132 are also curved so that the amount of protrusion from the surface 112 in the Z direction (toward the vehicle interior) gradually increases from the center toward both ends when viewed from the Y direction. Therefore, the centers of the first central rib 131 and the second central rib 132 are approximately parallel to the surface 112. In this embodiment, the first surface 115, the second surface 116, the first central rib 131, and the second central rib 132 have the same curved shape, but the degree of curvature of each can be changed.

[0046] As shown in FIG. 5, the surface 112 has a rectangular shape when viewed from the front, but as shown in FIGS. 4 and 6, the center portion is curved toward the rear side.

[0047] 1, 11, 17, and 18, a rectangular mounting plate 201 with multiple screw holes 201a is provided on the inside of each of the front and rear surfaces 113 and 114 of the outer hood 110 as a mounting fixture. The plates are fastened with bolts 203 and nuts 202 to sandwich the front surface 113 of the top body 111 between the vehicle body (front vehicle body 101) and the mounting plate 201, and the rear surface 114 of the top body 111 between the vehicle body (rear vehicle body 102) and the mounting plate 201. The rear surface 114 is fixed to the rear vehicle body 102 in a similar manner. The mounting plate 201 has a large hollow portion 201b at the portion where both ends of the first central rib 131 and the second central rib 132 pass through, to reduce weight. The female threads of the nuts 202 that receive the bolts 203 from the vehicle body are partially embedded in the outer hood 110. In order to prevent localized loads and damage to the outer hood 110 where the nuts are embedded and to enhance long-term durability, nuts 202 are not hexagonal nuts but cylindrical (round) nuts with flanges, and the flanges are welded to the mounting plate 201 (welded portion 205). In addition, strip-shaped protrusions 141, 142 extending in the Y direction are provided on the inside of the front surface 113 and rear surface 114 to prevent misalignment.

[0048] As shown in FIGS. 1 and 3 , on the interior side of the surface 112, multiple small ribs 150 parallel to the vehicle longitudinal direction protrude in the Z direction (interior side) between the first surface 115 and the first central rib 131, between the first central rib 131 and the second central rib 132, and between the second central rib 132 and the second surface 116. In this embodiment, two small ribs 150 are formed in groups to increase rigidity. The number of small ribs 150 is not limited to two, and may be one or three, or may be omitted. The direction of the small ribs may also be parallel to either the first central rib 131 or the second central rib 132, for example. Alternatively, the direction of each small rib may be changed, such as by arranging the small rib closer to the first surface 115 parallel to the first central rib 131, the small rib closer to the second surface 116 parallel to the second central rib 132, and the other small ribs parallel to the longitudinal direction. In addition, the height (Z direction) of the small rib 150 is set lower than the height of the first middle rib 131 and the second middle rib 132 so that the small rib 150 does not interfere significantly with the first middle rib 131 or the second middle rib 132 or protrude significantly in the Z direction (inside the vehicle) when the hood body 111 is extended or retracted.

[0049] As shown in FIG. 9 (omitted from FIG. 1), a cover portion 120 extending in a strip shape in the X direction is provided on the inside of the canopy body 111, covering the space S between the canopy bodies 111, 111. This cover portion 120 closes the space S between the canopy bodies 111, 111, making the space enclosed by the canopy body 111 invisible from the outside of the canopy body 111, thereby improving the appearance. In other words, it aims to improve the aesthetics. The cover portion 120 is attached to mounting brackets 121 provided on the outside of the front surface 113 and the rear surface 114, and its width in the X direction is approximately equal to the width of the canopy body 111 in the X direction.

[0050] A plurality of hood bodies 111 are arranged in the Y direction, and the intervals S between the hood bodies 111, 111 are covered with the cover portions 120, as shown in FIG.

[0051] Here, the cover part 120 is attached to one of the hood bodies 111 via the mounting bracket 121, but it need only cover the gap S between the hood bodies 111, 111, and may be attached to both hood bodies 111, 111. Furthermore, rather than partially covering the gap S between the hood bodies 111, 111, it may extend long in the Y direction and simultaneously cover multiple gaps S together with the entire back surface of the hood body 111.

[0052] Furthermore, as shown in Figures 15 and 16, instead of the band-shaped covering portion 120, a sheet-shaped skirt portion 125 may be integrally molded on the inside of one of the adjacent hood bodies 111, 111 without the use of a mounting bracket 121, so that the gap S between the adjacent hood bodies 111, 111 is filled with the skirt portion 125. The lower end of the skirt portion 125 extends so as to lap (make elastic contact with) at least the first surface 115 of the adjacent hood body 111, i.e., the lower hood body 111 in Fig. 15 (note that it does not necessarily have to lap, and may be in a so-called zero-touch state where it is barely in contact or not). Also, the lower end of the skirt portion 125 may extend to between the first surface 115 and the first central rib 131, or may extend to the first central rib 131 or below.

[0053] The skirt portion 125 is integrally molded from the same material as the hood body 111, so there is no risk of it coming off and it is stronger than the cover portion 120 which is attached via the mounting bracket 121.

[0054] The hood body 111 is integrally molded as a whole, including the first and second central ribs 131 and 132, and is made of a rubber-like elastic material such as rubber or elastomer. Although not particularly limited here, the entire body is made of solid EPDM rubber. The mounting plate 201 provided on the inside of the front surface 113 and rear surface 114, the bolts 203 and nuts 202 that secure it, and the mounting brackets 121 and cover portion 120 provided on the outside of the front surface 113 and rear surface 114 are separate parts.

[0055] According to the outer canopy 110 for a railway vehicle configured in this manner, the front and rear sides of the multiple canopy bodies 111 that make up the outer canopy 110, which covers the connecting portion 103 between the front body 101 and the rear body 102 of the railway vehicle 100 from the outside, are fixed to the front body 101 and the rear body 102, respectively, and the canopy body 111 is a housing that is open on the back side and consists of a surface 112, a front surface 113, a rear surface 114, a first surface 115 and a second surface 116, and a first middle rib 131 and a second middle rib 132 that protrude from the surface 112 toward the inside of the vehicle between the first surface 115 and the second surface 116 are integrally molded, resulting in an extremely simple structure compared to conventional examples consisting of multiple parts. In addition, the hood body 111 is made of a rubber-like elastic material, and the first central rib 131 and the second central rib 132 are integrally molded inside, so that although it has a simple structure, it is highly flexible and rigid and can be used for a long period of time.

[0056] Furthermore, since the adjacent hood bodies 111, 111 are not connected to each other, damage such as peeling off of the connection parts due to loads being applied in harsh environments, as was the case with the conventional example, does not occur.

[0057] The first central rib 131 is curved in an arch shape toward the second surface, the second central rib 132 is also curved in an arch shape toward the first surface, and the first surface 115 and the second surface 116 are also curved in an arch shape, so compared to when these are linear, the rigidity in the Z direction is increased and buckling deformation is suppressed. Furthermore, since the bending direction is restricted in advance, durability is superior.

[0058] Furthermore, when viewed from the outer circumferential direction (Y direction), the first surface 115, the second surface 116, the first central rib 131, and the second central rib 132 are curved so that the amount of protrusion from the surface 112 gradually increases from the center toward both ends, increasing the strength of both ends of the central rib and further improving rigidity. Furthermore, the center portion of the surface 112 itself is curved toward the back side, so the bending direction is restricted so that it does not protrude outward from the vehicle body surface, resulting in excellent durability.

[0059] Repeated expansion and contraction tests were conducted using the outer hood 110 for a railway vehicle of this embodiment, and it was confirmed that no cracks were found. This shows that the durability was about three times longer than that of the conventional product (FIGS. 12 and 13).

[0060] In this embodiment, the first surface 115 and the second surface 116 of the hood body 111 are curved in the same manner as the first central rib 131 and the second central rib 132, but the first surface 115 and the second surface 116 can also be made horizontal and not curved.

[0061] 3, the first and second central ribs 131 and 132 may be changed to first and second central ribs 131A and 132A having a wave-like shape as shown in FIG. 19. That is, the first and second central ribs 131A and 132A have a wave-like shape that undulates with amplitude in the Y direction (the circumferential direction surrounding the vehicle 100) and progresses in the X direction (the front-rear direction of the vehicle 100). Note that the first surface 115 and the second surface 116 may be curved as shown in FIG. 3, but here they are shown as horizontal and not curved.

[0062] If the first middle rib 131A and the second middle rib 132A are made wavy, the overall length can be longer compared to if they are curved like an arch. Therefore, even if the surface 112 stretches significantly as the hood body 111 expands and contracts, the first middle rib 131A and the second middle rib 132A have room to stretch and do not stretch as much as the surface 112, thereby slowing the progression of cracks that have developed in the first middle rib 131A or the second middle rib 132A. This makes it possible to obtain a crack-resistant outer hood 110 for a railway vehicle.

[0063] For example, as shown in Figure 19, a 5 mm long through-hole scratch K was cut in the center of the hood body 111 in the Y direction and penetrated the hood body 111 in the Z direction.After that, a scratch resistance test was conducted in a test room using a repeated expansion and contraction tester to expand and contract the hood body 111 by ±50% in the Y direction.As a result, the hood body 111 completely broke in the Y direction after 1,178 times.On the other hand, as shown in Figure 3, the same through-hole scratch K was cut in the same location of the hood body 111 of the curved first middle rib 131 and second middle rib 132, using the same material as the hood body 111 shown in Figure 19.A scratch resistance test was also conducted using a repeated expansion and contraction tester to expand and contract the hood body 111 by ±50% in the Y direction.As a result, the hood body 111 completely broke in the Y direction after 570 times. In addition, the material was changed to one with higher strength, and a similar repeated expansion and contraction test was performed on the hood body 111 shown in Figure 19 and the hood body 111 shown in Figure 3.The results showed that the hood body 111 shown in Figure 19 completely broke in the Y direction after 9,589 cycles, while the hood body 111 shown in Figure 3 completely broke in the Y direction after 3,600 cycles. When a through scratch was made in the X direction, the crack did not progress even when the above scratch resistance test was performed.

[0064] In this way, by changing the first middle rib 131 and the second middle rib 132 from an arch-shaped curve to a wave-shaped shape, the number of times until breakage can be more than doubled, thereby improving durability.

[0065] Furthermore, as shown in FIG. 20, the durability can also be improved by making the first central rib 131 and the second central rib 132 curved in an arch shape and making the small ribs 150A wavy.

[0066] Furthermore, as shown in FIG. 21, durability can also be improved by making the first middle rib 131 and the second middle rib 132 curved in an arch shape and making the small ribs 150B into multiple straight bodies inclined obliquely with respect to the X direction. Here, three small ribs 150 are provided that extend straight in the X direction, and small ribs 150B that extend linearly and incline at 45 degrees to the X direction toward the front surface 113 and small ribs 150B that extend linearly and incline at 45 degrees to the X direction toward the rear surface 114 are provided at intervals between the top surface 112a and the upper small rib 150, between the upper small rib 150 and the first middle rib 131, between the first middle rib 131 and the middle small rib 150, between the middle small rib 150 and the second middle rib 132, between the second middle rib 132 and the lower small rib 150, and between the lower small rib 150 and the bottom surface 112b. Although the inclination angle of the small ribs 150B and the spacing between adjacent ribs are not particularly limited, since cracks tend to spread in the direction in which the small ribs 150B extend, it is preferable that at least a portion of the small ribs 150B be present in the Y direction, as shown in Figure 21.

[0067] 22, thin-walled portions 155 may be provided at the bases of the small ribs 150, 150A, and 150B so that even if a crack occurs, it will be guided only in the X-axis direction. This makes it possible to slow the progression of the crack in the Y-axis direction. Here, the thin-walled portions 155 are formed by cutting the surface 112, but they may also be formed by cutting the small ribs 150, 150A, and 150B themselves.

[0068] Furthermore, as shown in FIG. 23, curved portions can be provided at the bases of the small ribs 150, 150A, and 150B, or simply made into edges without curved portions (shaping them to rise vertically from the surface 112 of the hood body 111, similar to the middle ribs 131 and 132 shown in FIG. 9). This concentrates stress and guides cracks, even if they occur, only in the X-axis direction. This can slow the progression of cracks in the Y-axis direction. If curved portions are provided, it is more preferable to make the radius of curvature R smaller than the width t of the small ribs 150, 150A, and 150B. This concentrates stress, guides cracks only in the X-axis direction, and slows the progression of cracks in the Y-axis direction.

[0069] 22 and 23 show the processing of the base portions of the small ribs 150, 150A, and 150B, but it is also possible to provide thin-walled portions 155 or curved portions 157 at the base portions of the medium ribs 131, 131A, 132, and 132A, or to form edges to concentrate stress, so that even if cracks occur, they will be guided only in the X-axis direction. [Explanation of symbols]

[0070] 10 outer hood 11 Hood body 12 outer sheet 13 Inner sheet 14 Polymeric synthetic sponge 15 sponge sheets 16 Extra length 100 railcars 101 Front body 102 Rear body 103 Connection part 110 outer hood 111 Hood body 112 Surface 112a Top side 112b Bottom side 113 Front 114 Rear 115 Front page 116 Second side 120 Cover 121 Mounting bracket 125 Skirt Section 131 First Middle Rib 131A First center rib 132 Second Middle Rib 132A Second center rib 141 Protrusion 142 Protrusion 150 small ribs 150A Small Rib 150B Small Rib 155 Thin-walled section 157 Curved surface part 201 Mounting plate (mounting bracket) 201a screw hole 201b Hollow section 202 Nut 203 volts 205 Welded parts CL Median Line K Penetrating scratch R radius of curvature S interval t Small rib width

Claims

1. An outer hood for a railway vehicle covers the connecting portion between the front and rear car bodies of the railway vehicle from the roof to the left and right sides continuously from the outside, and includes a plurality of hood bodies arranged in the circumferential direction surrounding the vehicle, and the front and rear sides of the hood bodies are fixed to the front and rear car bodies, respectively. The hood body is made of a rubber-like elastic material, When the front-rear direction of the vehicle is defined as an X direction, the outer circumferential direction is defined as a Y direction, and the direction perpendicular to the X direction and the Y direction is defined as a Z direction, The hood body is a housing having an opening on the back side that is the vehicle interior side in the Z direction, a front surface, front and rear surfaces at both ends in the X direction, and a first surface and a second surface at both ends in the Y direction, An outer hood for a railway vehicle, characterized in that a plurality of center ribs are integrally formed between the first surface and the second surface, protruding perpendicularly from the surface toward the inside of the vehicle.

2. 2. The outer hood for a railway vehicle according to claim 1, wherein the adjacent hood bodies are not connected to each other.

3. 2. The outer hood for a railway vehicle according to claim 1, wherein, of the plurality of middle ribs, a first middle rib located closer to the first surface than the midpoint between the first and second surfaces has a central portion curved closer to the second surface than both ends, and a second middle rib located closer to the second surface than the midpoint has a central portion curved closer to the first surface than both ends.

4. The outer hood for a railway vehicle according to claim 3, characterized in that the upper surface of the surface is linear when viewed from the Z direction, and the first surface is curved in the same direction as the first central rib relative to the surface, and the second surface is arch-shaped curved in the same direction as the second central rib.

5. The front surface has a central portion curved toward the back surface, 5. The outer hood for a railway vehicle according to claim 4, characterized in that the first surface, the second surface and the plurality of middle ribs are curved so that the amount of protrusion from the surface gradually increases from the center to both ends when viewed from the Y direction.

6. 6. The outer hood for a railway vehicle according to claim 1, wherein small ribs are provided between the plurality of middle ribs, protruding toward the interior of the vehicle and having a height smaller than that of the middle ribs.

7. 3. The outer hood for a railway vehicle according to claim 2, wherein a cover portion for covering the space between the adjacent hood bodies is provided on the inside of the hood body.

8. 3. The outer hood for a railway vehicle according to claim 2, wherein a skirt portion covering the space between the adjacent hood bodies is integrally formed on the inner side of one of the adjacent hood bodies.

9. 3. An outer hood for a railway vehicle according to claim 1, wherein mounting brackets are provided on the inside of the front and rear surfaces of the hood body, and the hood body is sandwiched between the car body and the mounting brackets.

10. 7. The outer hood for a railway vehicle according to claim 6, wherein the plurality of center ribs are wave-shaped.

11. 7. The outer hood for a railway vehicle according to claim 6, wherein the small ribs are wavy.

12. 7. The outer hood for a railway vehicle according to claim 6, wherein the small ribs are a plurality of linear bodies inclined obliquely with respect to the X direction.

13. 7. The outer hood for a railway vehicle according to claim 6, wherein a thin portion is provided at the base of each of the small ribs.

14. 14. The outer hood for a railway vehicle according to claim 13, wherein a curved surface portion is provided at the base of each of the small ribs, and the radius of curvature of the curved surface portion is smaller than the width of each of the small ribs.

15. 7. The outer hood for a railway vehicle according to claim 6, wherein the base portions of the small ribs are formed as edges.

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