JP3615216B1 - Rail vehicle wall or ceiling panels - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wall plate or ceiling plate of a railway vehicle that suppresses an increase in weight, has high heat insulation properties, and can reduce noise.
A wall plate or ceiling plate of a railway vehicle, comprising a plate-like and resin core material layer, first and second plate materials arranged on both sides of the core material layer, a core material layer, and a first core material layer. Adhering each of the first and second plate members, and intervening at least one of the joint portion between the first plate member and the core material layer and the joint portion between the second plate member and the core material layer, And an elastic material layer having a Young's modulus of 0.5 MPa to 10 MPa and a thickness of 0.1 mm to 2.0 mm. Since the elastic material layer functions as a vibration reducing layer and the elastic material layer also serves as an adhesive layer, the structure is simple and light weight, high heat insulation, and vibration proof are exhibited.
[Selection] Figure 1

Description

  The present invention relates to a wall plate or ceiling plate of a railway vehicle. More specifically, the present invention relates to a wall plate or ceiling plate of a railway vehicle in which vibration of a traveling vehicle is difficult to be transmitted to a passenger room.

  Wall boards and ceiling boards used for high-speed vehicles such as Shinkansen are required to be light in weight in order to improve the speed of the vehicle, while high heat insulation is required for air conditioning management in the vehicle. In order to satisfy these requirements, conventional wall boards and ceiling boards mainly employ a laminate structure in which a core material layer 90 is sandwiched between plate materials 92 as shown in the cross-sectional view of FIG. In order to reduce the weight, the plate member 92 is made of an aluminum alloy, and the core layer 90 is made of a foam made of an inorganic material or an organic material. The core material layer 90 and the plate material 92 are bonded and integrated by an adhesive layer 91 such as an epoxy adhesive. Since a foam is used for the core material layer 90, it is characterized by being lightweight and having high heat insulation.

  However, the conventional wall board or ceiling board has a problem that the interior noise is large. Roughly speaking, there are two types of in-vehicle noise generation factors. One is that vibrations from a running vehicle or driving device are transmitted, and a wall plate or ceiling plate is vibrated to generate a radiated sound. The other is a sound (transmitted sound) in which the noise generated outside the cabin is transmitted through the wall board and ceiling board. These radiated sound and transmitted sound are transmitted to the passenger room and become noise, which causes discomfort to passengers. In the conventional wall plate and ceiling plate, the core layer 90 becomes a vibration transmission path, and the vibration from the vehicle propagates as it is without being attenuated, and the radiated sound is particularly loud.

  Therefore, measures to reduce noise were studied. In general, the thicker the plate and the greater the weight, the better the soundproofing performance. The reason is that the thicker the plate, the less the transmitted sound, and the greater the weight, the harder it is to propagate the solid vibration and the less the emitted sound. For this reason, a countermeasure method for increasing the thickness or weight of the core material layer or the plate material has been considered, but it has not been adopted on the entire surface of the vehicle because it leads to an increase in weight.

In order to solve the above problem, Patent Document 1 below discloses a soundproof structure using a sandwich panel. The connecting portion of the sandwich panel is provided with a damping material so that vibration can be suppressed. However, even if such a soundproof structure is used, the radiated sound cannot always be sufficiently reduced.
JP 2001-278039 A

  As explained so far, lightweight wall boards and ceiling boards are inferior in soundproofing. That is, there is a limit only by improving the core material, and it is difficult to improve the light weight and the soundproofing at the same time. In addition, there is still a demand for improving heat insulation, and research on wall boards and ceiling boards having these characteristics has been continued for many years by the present applicant.

  The present invention has been made in the background as described above, and in particular, provides a wall plate or ceiling plate for a railway vehicle that minimizes an increase in weight, has high heat insulation properties, and can reduce noise. The task is to do.

  In order to solve the above-mentioned problems, the present invention is a wall plate or ceiling plate of a railway vehicle, which is a plate-like and resin core material layer, and first and second plate materials arranged on both surfaces of the core material layer. And the core material layer and the first and second plate materials, respectively, and at least one of a joint portion between the first plate material and the core material layer and a joint portion between the second plate material and the core material layer An elastic material layer having a Young's modulus of 0.5 MPa to 10 MPa and a thickness of 0.1 mm to 2.0 mm, and the elastic material layer functions as a vibration reducing layer. And the elastic material layer also serves as an adhesive layer.

  In order to solve the above-described problems, the present invention provides a railroad car wall plate or ceiling plate, which is a plate-shaped and foamed resin core material layer, and first and second plates disposed on both surfaces of the core material layer. The second plate material, the core material layer and the first and second plate materials, respectively, and the joint portion between the first plate material and the core material layer; and the joint portion between the second plate material and the core material layer; And an elastic material layer having a Young's modulus of 0.5 MPa or more and 10 MPa or less and a thickness of 0.1 mm or more and 2.0 mm or less, wherein the elastic material layer reduces vibration. It functions as a layer, and the elastic material layer also serves as an adhesive layer.

  The present invention intends to provide a vibration reducing effect to an elastic material layer between a core material layer and a plate material. As a result, it is possible to reduce radiated sound from the walls and ceiling. When the elastic material layer has a Young's modulus of 0.5 MPa or more and 10 MPa or less and a thickness of 0.1 mm or more and 2.0 mm or less, the radiated sound can be effectively reduced.

  In the present invention, the elastic material layer also serves as an adhesive layer between the core material layer and the plate material. That is, the first and second plate members are arranged on both surfaces of the core material layer, and these are bonded with a thick elastic adhesive so that the adhesive layer becomes an elastic material layer. The adhesive that can be used here is, for example, a urethane-based, silicon-based, modified silicon-based, epoxy-based, acrylic-based, natural rubber-based, or synthetic rubber-based adhesive whose Young's modulus is in the range of 0.5 MPa to 10 MPa. is there. Such an adhesive is preferable because it can attenuate vibration more effectively and has a high effect of reducing radiated sound as compared with a relatively hard adhesive having a Young's modulus exceeding 10 MPa. As shown in FIG. 9, the conventional wall board and ceiling board do not show a sufficient vibration reducing effect because the core material layer 90 and the plate material 92 are bonded with a hard adhesive layer 91. On the other hand, since the elastic adhesive is used in the present invention, the vibration reducing effect is higher than that of the conventional wall plate or ceiling plate, and noise can be reduced.

  The elastic material layer bonds the core material layer and the first and second plate materials, and joins the first plate material to the core material layer and the second plate material to the core material layer. It is interposed in at least one joint part with the part. That is, the elastic material layer that bonds the core material layer and the first plate material and the elastic material layer that bonds the core material layer and the second plate material both have Young's modulus of 0.5 MPa or more and 10 MPa or less and are thick. When the thickness is 0.1 mm or more and 2.0 mm or less, both of these two elastic material layers contribute to the attenuation of vibration, so that the effect of reducing the radiated sound is high. It is possible that only one of the elastic material layers satisfies the above Young's modulus and thickness conditions. In that case, although the effect of reducing radiated sound is exhibited, the effect is slightly lowered.

  If an elastic material is used for the core material layer, the core material layer together with the elastic material layer contributes to vibration reduction from the traveling vehicle. As a result, the radiated sound can be further reduced and the noise can be reduced. The core material layer is required to have appropriate compressive strength, light weight, and heat insulation, and an elastic foamed resin can be suitably used as a material that satisfies such requirements. The elastic foamed resin is an elastic resin in which a large number of bubbles are created by adding a foaming agent to a synthetic resin or mechanically bubbling, and since it contains bubbles, it has light insulation properties. For example, the expansion ratio is preferably about 5 to 30 times. In particular, polypropylene foam resin is lightweight and suitable. In addition, acrylic, polyethylene, natural rubber, chloroprene rubber, synthetic rubber such as SBR (styrene butadiene rubber) or EPDM (ethylene propylene diene rubber), urethane, wood, phenol resin, vinyl chloride, and the like may be used. Moreover, in order to maintain the strength as a wall board or a ceiling board, it is desirable that the compressive strength of the core material layer is 0.1 MPa or more. If it is less than 0.1 MPa, it cannot be said that it is necessarily sufficient strength as a wall board or a ceiling board.

  The plate material has high rigidity and flame retardancy, and it is desirable to use a lightweight material. Specifically, a metal such as aluminum or a heat resistant resin such as melamine resin, polyimide resin, polyamide resin, or polyimide amide resin is preferable. The metal plate is particularly good because it is nonflammable. Among them, the metal plate made of aluminum is lightweight and can be suitably used as a plate material.

  As described above, in the present invention, the first and second plate members are arranged on both surfaces of the core material layer via the elastic material layer and bonded to each other, whereby the elastic material layer has a vibration reducing effect. is there. The core material layer is made of a material with elasticity and heat insulation, and the double effect of the core material layer and the elastic material layer is achieved by enhancing the vibration proof property with the elastic material layer while maintaining the noise reduction effect and heat insulation effect. Noise can be reduced. Moreover, since the elastic material layer also serves as an adhesive function between the core material and the first and second plate materials, a separate elastic plate material can be omitted. If a dedicated elastic plate is disposed, as shown in the sectional view of FIG. 5, an adhesive layer 54 between the core layer 51 and the elastic plate 53, and an adhesive between the elastic plate 53 and the plate 52. If the two layers 54 are required and the same structure is used on both sides, two elastic plate members 53 and four adhesive layers 54 are required. If the plate members 52 are combined, the structure has nine layers as a whole. End up. In contrast, in the present invention, the structure shown in the cross-sectional view of FIG. 1 is used, and no dedicated elastic plate material is required, and the elastic material layer 2 also serves as an adhesive layer. Although the material layer 2 and the first and second plate members 3 have a simple structure of only five layers, both heat insulation and vibration proofing are realized. As a result, a triple effect that satisfies the three conditions of heat insulation, high vibration proofing, and low cost required for the wall plate or ceiling plate of the railway vehicle is achieved. In addition, by making the core material an elastic foamed resin, it is possible to achieve further weight reduction while ensuring heat insulation, thereby simultaneously achieving four remarkable effects of heat insulation, high vibration isolation, low cost and light weight. Can do.

  As described above, according to the present invention, since the Young's modulus is 0.5 MPa or more and 10 MPa or less and the thickness is 0.1 mm or more and 2.0 mm or less on both surfaces of the core material layer, the traveling vehicle The elastic material layer can effectively attenuate the vibration from the sound over a wide frequency band, and the noise to the cabin can be effectively reduced. Furthermore, since an elastic foamed resin material is used for the core material layer, vibrations can be damped together with the elastic material layer, radiation sound can be further reduced, and a wall plate or ceiling plate that is lightweight and excellent in heat insulation is provided. Can do. In addition, since an elastic foamed resin material having a compressive strength of 0.1 MPa or more is used for the core material layer, it can have sufficient rigidity as a wall plate or ceiling plate of a railway vehicle.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic cross-sectional view showing the structure of a wall plate or ceiling plate of a railway vehicle. This wall plate or ceiling plate has a structure in which two plate members 3 are arranged on both surfaces of a plate-like and resin-made core material layer 1. And between the core material layer 1 and each board | plate material 3, there exists the elastic material layer 2, and the elastic material layer 2 serves as the contact bonding layer. The elastic material layer 2 has a Young's modulus of 0.5 MPa to 10 MPa and a thickness of 0.1 mm to 2.0 mm. If it does in this way, since the elastic material layer 2 functions as a vibration reduction layer, vibration is not transmitted so much to a passenger room, and a radiation sound can be reduced. As the elastic material layer, urethane-based, silicon-based, modified silicon-based, epoxy-based, acrylic-based, natural rubber-based, and synthetic rubber-based adhesives can be suitably used, and among them, urethane-based adhesives are most preferable.

  When the core material layer is made of an elastic material, the vibration is attenuated together with the above-described elastic material layer, so that it is possible to further reduce the sound emitted to the cabin. In particular, it is preferable to use a foamed polypropylene resin for the core material layer, and the compressive strength is preferably 0.1 MPa or more. If the compressive strength is less than 0.1 MPa, it cannot always be said that the strength is sufficient as a wall plate or a ceiling plate. The expansion ratio of the foamed resin is preferably 5 to 10 times. If the expansion ratio is less than 5 times, the density increases, and sufficient weight reduction may not always be achieved. In addition, when the expansion ratio exceeds 10 times, the compressive strength is lowered, and sufficient strength as a wall plate or ceiling plate may not always be obtained. Synthetic rubbers such as acrylic, polyethylene, natural rubber, chloroprene rubber, SBR (styrene butadiene rubber) or EPDM (ethylene propylene diene rubber), urethane, wood, phenol resin, vinyl chloride and the like can also be suitably used as the core material layer.

  The critical meaning of the Young's modulus and thickness of the elastic material layer will be described. If the Young's modulus of the elastic material layer is less than 0.5 MPa, it is too soft and when used as a wall or ceiling, sufficient strength cannot always be maintained. If it exceeds 10 MPa, it is too hard to sufficiently attenuate the vibration from the traveling vehicle, and the effect of reducing radiated sound is reduced. A more desirable Young's modulus is 2 MPa or more and 5 MPa or less.

  If the thickness of the elastic material layer is less than 0.1 mm, the vibration from the traveling vehicle propagates without being sufficiently attenuated, and the radiated sound cannot be sufficiently reduced. If it exceeds 2.0 mm, there arises a problem that the overall weight is increased, and it is difficult to achieve both weight reduction. A more desirable thickness is 0.3 mm or more and 0.5 mm or less. In addition, the said thickness is the thickness for one elastic material layer.

  A desirable ratio of the thicknesses of the plate material 3, the elastic material layer 2, and the core material layer 1 will be described. The thickness of the plate material 3 is A, the thickness of the elastic material layer 2 is B, and the thickness of the core material layer 1 is C. A / B is preferably 0.2 or more and 30 or less. If A / B exceeds 30, there is a problem that the plate material 3 is too thick and the whole weight becomes heavy, and it may not always be possible to reduce the weight sufficiently. If A / B is less than 0.2, the thickness of the plate 3 becomes too thin, and the plate 3 is difficult to maintain sufficient strength. Moreover, it is desirable that B / C be 0.003 or more and 0.35 or less. If B / C exceeds 0.35, there is a problem that the elastic material layer 2 is too thick, and a sufficient weight reduction may not always be possible. If B / C is less than 0.003, the elastic material layer 2 may be too thin, resulting in low adhesive strength.

  In the present invention, the elastic material layer 2 that bonds the core material layer 1 and the first plate material 3 and the elastic material layer 2 that bonds the core material layer 1 and the second plate material 3 both have a Young's modulus of 0. Most preferably, the thickness is 5 MPa or more and 10 MPa or less and the thickness is 0.1 mm or more and 2.0 mm or less. When both elastic material layers 2 satisfy the above conditions, each elastic material layer 2 functions as a vibration reducing layer, and radiated sound can be effectively reduced. It is also possible that only one of the elastic material layers 2 satisfies the above conditions. In that case, since only one elastic material layer 2 functions as a vibration reducing layer, although there is an effect of reducing radiated sound, the effect is slightly lowered.

  The form which installs the wall board or ceiling board of this invention in a railway vehicle is demonstrated. FIG. 6 is a schematic cross-sectional view of a passenger room of a railway vehicle. As shown in the drawing, the railway vehicle includes a frame 61, a side structure 62, a girder 63, and a roof structure 64, and a floor plate 60 is fixed on the frame 61 via a floor support 65. A wall plate W is installed on the inner surface of the side structure 62, and a ceiling plate C is installed on the inner surface of the roof structure 64, which respectively constitute the side wall and the ceiling of the guest room. A vehicle window (not shown) is attached to the side structure 62 and the wall plate W, and a lighting fixture 68 is also attached to the ceiling plate C at a predetermined position. An air conditioning duct 69 is installed in the space between the underframe 61 and the floor board 60, and the air conditioning in the cabin is performed by the air conditioning duct 69. In FIG. 6, the wall plate W and the ceiling plate C are installed in direct contact with the side structure 62 and the roof structure 64, respectively, but may be installed with a space therebetween. As described above, the present invention constitutes the side wall and ceiling of the passenger cabin. A driving device (not shown) is installed below the underframe 61, and vibrations are emitted from the driving device, the vehicle main body, or wheels while the railway vehicle is traveling, and are transmitted from the wall plate W or the ceiling plate C to generate noise. However, in the present invention, as described above, the wall plate W or the ceiling plate C is devised to reduce vibrations, so that the passenger feels less noise. In addition, since a highly heat-insulating core material is used, less power is required for air conditioning in the passenger cabin.

  The wall plate W is also used in the locations shown in FIGS. 7 (a) and 7 (b). FIG. 7A is a cross-sectional view of the railway vehicle. As shown in the figure, the boundary between the cabin and the deck is composed of two wall plates W, and an automatic door is provided between the wall plates W. It has been incorporated. On the other hand, a wall plate W is installed on the inner wall surface of the wife 63. There is a through-passage in the center of the wife part 63, which is used for movement to the next vehicle. The boundary between these decks and guest rooms or the inner wall surface of the wife has, for example, the structure shown in FIG. The wall surface is reinforced by a plurality of peripheral members 71 whose peripheral portions are made of aluminum or the like, and a through passage or an automatic door for moving to the next vehicle is formed at the center of the wall surface. A decorative plate (not shown) is attached to the surfaces of the wall plate W and the peripheral member 71 so as not to be directly visible from the cabin or the deck.

  FIG. 8 is a schematic cross-sectional view showing an embodiment of the joint between the wall plate W and the peripheral member 71 at both ends of the passenger cabin. The frame of the wall plate W is composed of a hollow frame 82, and by including a cavity 83 inside the frame 82, weight reduction and cost reduction are achieved. The plate member 3 sandwiches the core member 1 and the frame 82, and one plate member 3 (lower side in the figure) protrudes from the side surface to constitute a joint 85 with the peripheral member 71. The frame 82 and the plate 3 are bonded with a structural tape or a frame adhesive 84. The thickness of the peripheral member 71 is substantially the same as that of the wall plate W, and a step is provided so as to match the joint portion 85. The peripheral member 71 and the wall plate W are aligned so that both surfaces thereof are flush with each other, and a metal screw 81 is driven into and fixed to a necessary portion.

  In order to confirm the effect of the present invention, a vibration test was performed. Examples 1 to 4 and Comparative Example 1 shown in Table 1 below were prepared as plates used in the experiment.

The production conditions of Examples 1 and 2 and Comparative Example 1 will be described below. First, a core material layer made of an acrylic foam resin and having a compressive strength of 2 MPa and a thickness of 19 mm was prepared, and a urethane adhesive having a Young's modulus of 3 MPa was applied to both main surfaces thereof. A plate material made of an aluminum alloy and having a thickness of 1.0 mm was bonded to the core material and pressed at 500 g / cm ² . In this way, a plate having a thickness of the elastic material layer (adhesive layer) of 0.3 mm was prepared and used as Example 1 belonging to the present invention. The overall size was 430 mm × 430 mm.

  Next, Example 2 which belongs to this invention was created using the core material layer which consists of a foaming resin made from a polypropylene and has a compressive strength of 0.2 MPa and a thickness of 19 mm. Manufacturing conditions other than the core material layer are the same as those in Example 1. Also, a conventional plate having the structure of FIG. 5 was prepared and used as Comparative Example 1 outside the present invention.

  The test apparatus is shown in FIG. A plate to be tested was suspended by an elastic support 28, and a vibrator 21 was placed on the lower surface of the test subject via a connecting rod 26. The vibrator 21 receives a signal from the noise generator 22 and generates vibrations V of various frequencies according to the signal. The vibration V is transmitted to the test object through the connecting rod 26 and generates a radiated sound. The emitted sound was measured by the intensity microphone 24 arranged above the test object, and the sound was directly guided to the integral-type intensity meter 25 through the high-pass filter. The measured values were stored in a computer.

  The measurement results are shown in the graph of FIG. As apparent from the graph, in Examples 1 and 2, no significant peak was observed over 100 Hz to 4 kHz, and the overall value was lower than that in Comparative Example 1. From this result, it can be confirmed that Example 1 and Example 2 having an elastic material layer have a high effect of reducing the radiation volume. Moreover, when Example 1 and Example 2 are compared, it turns out that Example 2 tends to reduce a radiated sound. This is because the Young's modulus of the core material layer is different. In Example 2 having a core material layer with a low Young's modulus, both the core material layer and the elastic material layer contribute to the reduction of vibration, and thus it is easy to reduce the radiated sound.

  Next, an experiment was conducted to confirm the influence of the Young's modulus of the elastic material layer on the radiation volume. For this purpose, Example 3 shown in Table 1 was prepared. Example 3 is prepared by preparing a core material layer made of acrylic foamed resin, applying a urethane adhesive with a Young's modulus of 0.8 MPa on both main surfaces, and bonding a plate made of aluminum alloy, It belongs to the present invention. Manufacturing conditions other than the adhesive were the same as in Example 1. The result of measuring the radiated sound of Example 1 and Example 3 is shown in FIG. From this result, it can be confirmed that Example 3 having a lower Young's modulus of the adhesive layer is more likely to reduce radiated sound.

  Next, a comparative experiment was conducted when the elastic material layer was formed only on one side. For this purpose, Example 4 shown in Table 1 above was prepared. In Example 4, the core material layer and one plate material were bonded by an elastic material layer having a thickness of 0.3 mm and a Young's modulus of 3 MPa, and the other plate material was bonded by a hard adhesive having a Young's modulus of 30 MPa. Belongs. The conditions other than the adhesive layer were the same as in Example 1. On the other hand, both sides of the above Comparative Example 1 were bonded with a hard adhesive having a Young's modulus of 30 MPa, and the radiated sound was measured using the Comparative Example 1, Example 1, and Example 4. The measurement results are shown in FIG. As is apparent from the overall values in the figure, Comparative Example 1, Example 4, and Example 1 are in descending order of the radiated sound, and Example 1 in which both surfaces are made of an elastic material layer has the lowest radiant volume, and only on one side. Example 4 with an elastic material layer is the next lowest. From the overall values of Comparative Example 1, Example 4, and Example 1, it can be seen that the reduction effect of the radiated sound increases as the elastic material layer increases to 0 layer, 1 layer, and 2 layers.

The schematic sectional drawing which shows one Embodiment of the wall board or ceiling board of a rail vehicle. The block diagram of the apparatus used for the vibration test. The graph which shows the result of an excitation test. The graph which shows the result of the vibration test of the wall board or ceiling board which has an elastic material layer only on one side. It is sectional drawing at the time of using a special elastic board material temporarily. Sectional drawing which shows one Example of a railroad train. (A) Cross-sectional view and (b) Cross-sectional view showing the boundary between the cabin and the deck or the inner wall surface of the wife. Sectional drawing which shows one Embodiment of the junction part of a wall board. Sectional drawing which shows the conventional wall board or ceiling board.

Explanation of symbols

1 Core material layer 2 Elastic material layer 3 Plate material 53 Dedicated elastic plate material 54 Dedicated adhesive layer C Ceiling plate V Vibration W Wall plate

Claims (8)

  A railcar wallboard or ceilingboard,
  A core layer made of a plate-like and foamed resin;
  First and second plate members disposed on both sides of the core layer;
  The core material layer and the first and second plate materials are bonded to each other, the joint portion between the first plate material and the core material layer, and the joint portion between the second plate material and the core material layer. And an elastic material layer having a Young's modulus of 0.5 MPa to 10 MPa and a thickness of 0.1 mm to 2.0 mm,
  Including
  The elastic material layer functions as a vibration reducing layer, and the elastic material layer also serves as an adhesive layer;
  The foaming ratio of the core material layer is 5 times or more and 30 times or less,
  The core material layer has a compressive strength of 0.1 MPa or more,
  The ratio of the thickness of the plate material to the thickness of the elastic material layer is 0.2 or more and 30 or less, and the ratio of the thickness of the elastic material layer to the thickness of the core material layer is 0.003 or more and 0.35 or less. A wall plate or ceiling plate of a railway vehicle, characterized in that there is.   The elastic material layer includes a urethane adhesive layer, a silicon adhesive layer, a modified silicon adhesive layer, an epoxy adhesive layer, an acrylic adhesive layer, a natural rubber adhesive layer, and a synthetic rubber adhesive layer. The wall board or ceiling board of a railway vehicle according to claim 1, comprising any one of the following.   The railway according to claim 1, wherein the core layer is made of any one of acrylic, polypropylene, polyethylene, urethane, chloroprene rubber, SBR (styrene butadiene rubber), natural rubber, synthetic rubber, wood, phenol resin, and vinyl chloride. Vehicle wall or ceiling panel.   The wall plate or ceiling plate of a railway vehicle according to claim 1, wherein the plate material is a metal plate.   A hollow frame having substantially the same thickness as the core material layer is disposed around the core material layer, the first and second plate members sandwich the frame, and the elastic material layer and the frame. The wall board or ceiling board of a railway vehicle according to claim 1, wherein the first and second board materials are bonded together. 2. The rail vehicle wall plate according to claim 1, wherein one of the first plate member and the second plate member protrudes toward the peripheral side to form a joint portion with an adjacent plate member. Ceiling board. 2. The wall plate of a railway vehicle according to claim 1, wherein the wall plate of the railway vehicle is used as a wall plate at a boundary portion that constitutes a boundary between the deck of the railway vehicle and a passenger cabin and has an automatic door incorporated therein. The wall plate of a railway vehicle according to claim 1, which is used for an inner wall of a wife portion of the railway vehicle.