JP2006298188A - Noise-absorbing type snow-melting panel for railroad - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a noise-absorbing type snow-melting panel for a railroad vehicle which is suitably used for the railroad vehicle, and preventing deposition of snow and ice, and absorbing noise. <P>SOLUTION: The noise-absorbing type snow-melting panel 10 for the railroad vehicle comprises: a surface member 15 consisting of an exterior plate 12 and an interior plate 13 having a plurality of through holes 11; and a honeycomb core 14 with the exterior plate 12 adhering to one side thereof and the interior plate 13 adhering to the other; bar-shaped heating means 16 fixed to the surface of the interior plate 13 of the surface member 15 at a predetermined spacing; and a plate-like noise-absorbing member 17 having the noise-absorbing characteristic which is arranged opposite to the surface member 15 across the heating means 16. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a snow melting panel capable of preventing snow accretion, icing, and the like, and more particularly to a railway noise absorption type snow melting panel used for railway vehicles and the like which can absorb noise.

  Conventionally, in high-speed rail vehicles such as Shinkansen, various noise countermeasures are taken so that the noise level falls below a predetermined noise environment regulation value. As shown in FIG. 8 (A), the noise generated with the traveling of the railway vehicle 100 includes noise from the carriage 103 and the underfloor equipment such as contact sound between the wheel 101 and the rail 102 and driving sound of the wheel 101, pantograph. Examples include noise from the surroundings of the pantograph 104 such as wind noise of 104, contact sound between the pantograph 104 and the overhead line 105, and noise from around the vehicle body 106 such as aerodynamic noise caused by friction between the vehicle body 106 and air.

  As a means for reducing noise around the vehicle body 106, a sound absorbing panel 107 having a structure as shown in FIG. 8B is known. The sound absorbing panel 107 is disposed at a position spaced apart from the base member 108 by a base member 108 attached to the vehicle body 106, a U-shaped support member 109, and the support member 109, and is made of a porous material such as foamed aluminum. A sound absorbing material 110 made of a material and a band plate 111 that is disposed on the front side of the sound absorbing material 110 and fixes the sound absorbing material 110 to the support member 109 are configured.

  The sound absorbing panel 107 has a cavity 112 formed by a base member 108 and a support member 109 on the back side of the sound absorbing material 110, and the noise can be reduced by resonating with the cavity 112. By acting together with the material 110, noise is absorbed. It has been proposed to further reduce aerodynamic noise by arranging a punching metal and cloth on the front side of the sound absorbing panel 107 (Patent Document 1).

  Conventionally, noise from the carriage 103 and the underfloor equipment has been dealt with on the track facility side, not on the vehicle side, such as the soundproof wall 113, as shown in FIG. 8A.

  On the other hand, a sound absorbing panel 115 as shown in FIG. 9 has been proposed as a sound absorbing panel used for the interior and exterior of a building (Patent Document 2). In this sound absorbing panel 115, the sound absorbing material 117 is filled in the cells of the honeycomb core 116, and the surface layer material 118 in which a woven fabric made of glass fiber is hardened with a resin is fixed to one surface of the honeycomb core 116. The sound insulation material 119 is fixed to the other surface of the material, and by absorbing noise by the surface layer material 118 and the sound absorption material 117, the sound absorption rate is increased, and it is thin and lightweight.

JP 2002-67941 A JP 2004-116118 A

  By the way, in the future, higher speeds of high-speed railway vehicles are expected. For example, when the maximum operating speed is currently 275 km / h to 360 km / h, the noise is approximately proportional to the square of the speed. Although there is a risk that the current noise may increase by about 70% or more, the noise around the pantograph 104 and the vehicle body 106 can be dealt with to some extent by the current technology, whereas the carriage 103 below the surface of the vehicle body 106 can be dealt with. As for noise generated from surroundings and underfloor equipment (not shown), the soundproof wall 113 alone is not sufficient, and it is necessary to take noise countermeasures on the railcar 100 side as well.

  However, in the sound absorbing panel 107 of Patent Document 1, since the sound absorbing characteristics are obtained by the resonance action of the cavity 112, the cavity 112 needs to have a predetermined thickness (45 mm or more). For this reason, there are problems that the installation space for the bogie 103 and the underfloor equipment below the vehicle body is narrowed and the weight of the sound absorbing panel 107 is increased.

  Moreover, in the sound absorption panel 115 of patent document 2, what has a desired sound absorption characteristic can be implement | achieved thin and lightweight. However, since the surface of the sound absorbing panel 115 is simply a woven fabric made of glass fiber hardened with a resin, an impact (for example, when entering a tunnel or passing by a high speed railway vehicle) It is weak in strength against impacts caused by pressure fluctuations, collisions of foreign substances, etc., and may be damaged. When damaged by impact, there is a problem that the honeycomb core is exposed and the sound absorbing material 117 inside leaks out. .

  For this reason, the inventors of the present application disclosed in a previous application (Japanese Patent Application No. 2005-063283) a honeycomb sandwich panel having high rigidity and rigidity having a plurality of through holes 121 on the front surface of the sound absorbing member 120 as shown in FIG. By arranging the surface member 122 made of the following, pressure fluctuation applied when the tunnel enters and exits at the time of high-speed traveling in a high-speed railway vehicle, or collision of foreign matter, In addition to protecting the sound absorbing member 120 from impact due to the noise and the like, the sound absorbing member 120 absorbs noise through the through-hole 121 of the surface member 122, and a novel noise absorbing panel 123 excellent in strength rigidity and sound absorbing characteristics is obtained. is suggesting.

  However, when a railway vehicle equipped with the noise absorbing panel 123 is used in a cold region, snow or the like adheres to the surface of the noise absorbing panel 123, so that a plurality of through holes 121 provided in the surface member 122 are provided. Is closed, and the sound absorption characteristics of the noise absorbing panel 123 are remarkably deteriorated so that the function as the noise absorbing panel is not achieved.

  The above contents are not only a problem on the railcar side, but also on the soundproof wall provided along the track, there is a problem that the function of the soundproof wall is not performed due to adhesion of snow and ice.

  Furthermore, apart from the problem of noise, if snow or ice attached to the body of a railroad vehicle grows into a lump and falls off during travel, the lump hits a railroad vehicle or a facility along the railway line. Since there is a risk of damage, at present, the railcars are designed to remove snow attached to the workers while the railway vehicle is stopped, and the removal work is difficult. It had an effect on scheduled service.

  Therefore, in view of the above circumstances, the present invention has an object to provide a noise absorption type snow melting panel for railway that can be suitably used for railway vehicles and the like, and can prevent snow and icing and can absorb noise. To do.

  In order to solve the above-mentioned problems, a railway noise absorption type snow melting panel according to the present invention includes an “outer surface plate and inner surface plate having a plurality of through holes, and the outer surface plate bonded to one side and the inner surface plate bonded to the other. A surface member comprising a honeycomb core, a rod-like or plate-like heating means fixed at a predetermined interval on the surface of the inner surface plate of the surface member, and disposed on the opposite side of the surface member across the heating means And a plate-like sound absorbing member having a sound absorbing characteristic ”.

  Here, the “outer surface plate and inner surface plate” are not particularly limited as long as they have a plurality of through-holes, but have excellent corrosion resistance and damage resistance, and have high thermal conductivity. It is desirable to use a punching metal made of stainless alloy, aluminum alloy, copper alloy or the like. The “honeycomb core” preferably has a predetermined rigidity and a high thermal conductivity, and for example, an aluminum alloy or a copper alloy is preferably used.

  Moreover, it is desirable that the “heating means” generate heat when energized, and the shape may be a bar shape or a plate shape (in particular, a belt shape). Further, it may be flexible.

  Further, the “sound absorbing member” is not particularly limited as long as it has sound absorbing characteristics. For example, “foamed resin having open cells”, “glass wool”, “metal fibers such as aluminum”, etc. In particular, it is desirable to use a foamed resin.

  By the way, as a position where the heating means is arranged, for example, when the heating means is exposed on the surface of the noise absorbing panel (surface of the outer plate), the heating means is exposed on the surface. There is a high possibility that a foreign object or the like will hit, and the heating means may be damaged.

  For this reason, it is conceivable to dispose the heating means on the back side of the outer surface plate to prevent the heating means from being damaged by foreign matter and the like and to obtain a desired snow melting effect. It was found that the temperature distribution on the surface side of the surface of the surface of the substrate increased at a temperature difference between the position where the heating means was fixed and the position where it was not fixed. FIG. 11 shows the distribution of the surface temperature of the outer surface plate using stainless steel alloy as the outer surface plate, with 12 heating means arranged between about 1 m, and the outside air temperature of −10 ° C. Thus, the difference between the high temperature part and the low temperature part is about 23 ° C., and the low part is the same temperature as the outside air temperature. There are parts that cannot be obtained. In other words, because there is a part where the surface temperature of the outer plate does not rise at all, even if the output of the heating means is increased, there is a part that does not differ from the outside temperature, so the snow melting effect cannot be expected, and snow and icing are prevented There is a problem that cannot be done.

  Therefore, it is conceivable to reduce the interval between the heating means. In this case, however, the ratio of the through holes of the outer surface plate being closed by the heating means is increased, and noise cannot be sufficiently passed, so that the desired sound absorption is achieved. There is a problem that characteristics cannot be obtained. In addition, it is very difficult to dispose the heating means on the back side of the outer plate, that is, inside the honeycomb sandwich panel.

  Therefore, according to the noise absorption type snow melting panel for railways of the present invention, the heating means is arranged at a predetermined interval between the surface member made of the honeycomb sandwich panel having a plurality of through holes and the sound absorbing member. The heat from the heating means is transmitted to the inner surface plate, the honeycomb core, the outer surface plate, the temperature distribution on the surface of the outer surface plate is substantially uniform, and the surface temperature unevenness can be reduced as much as possible. Snow or ice can be prevented from adhering to the surface.

  More specifically, the heat from the heating means fixed to the inner surface plate at a predetermined interval is first transmitted to the inner surface plate, and is also transmitted to the surface direction so that the temperature of the inner surface plate becomes substantially uniform. The honeycomb core fixed to the inner surface plate transfers the heat substantially uniformed in the inner surface plate to the outer surface plate, and the surface temperature of the outer surface plate becomes a substantially uniform temperature distribution. In addition, as an inner surface board, the thing with high heat conductivity to a surface direction is good, Preferably it is an aluminum alloy, More preferably, it is preferable to use a copper alloy.

  In order to support the operation of the present invention, FIG. 5 shows that the outer plate is made of a stainless alloy, the inner plate is made of an aluminum alloy, twelve heating means are arranged between about 1 m, and the outside air temperature is measured at −10 ° C. As shown in the figure, the temperature distribution on the surface of the outer plate is such that the temperature difference between the high part and the low part is much smaller than the example shown in FIG. 3 ° C), the temperature distribution on the surface of the outer plate becomes substantially uniform, the low temperature part becomes higher than the outside air temperature, and there is no part where the heat from the heating means cannot be obtained. Therefore, the output of the heating means may be appropriately set according to the environmental temperature using the railway noise absorption type snow melting panel of the present invention.

  Further, according to the present invention, the sound absorbing member is disposed on the back side of the heating means, and the sound absorbing member generally has a heat insulating property, so that heat from the heating means is released to the outside through the sound absorbing member. The heat from the heating means can be efficiently transmitted to the surface member, and the temperature distribution on the surface of the surface member can be made substantially uniform in synergy with the above effect. .

  Furthermore, as described above, even if the heating means is arranged and fixed at a predetermined interval that does not affect the noise transmission by the surface member, the temperature distribution on the surface can be made substantially uniform, so that the desired temperature can be obtained. A snow melting effect can be obtained, and at the same time, it can have the same sound absorption characteristics as the noise absorbing panel of the previous application. When used in a railway vehicle in a cold region, the noise is effective even during snowfall. Can be reduced.

  In addition to the above-described configuration, the railway noise absorption type snow melting panel according to the present invention may have a configuration in which “at least the inner surface plate of the surface member is made of an aluminum alloy or a copper alloy”.

  According to the railway noise absorption type snow melting panel of the present invention, at least the inner surface plate of the surface member is made of an aluminum alloy or a copper alloy having a good thermal conductivity. Therefore, it is possible to make the surface temperature distribution more uniform and to enhance the snow melting effect.

  In addition to the above configuration, the railway noise absorption type snow melting panel according to the present invention has a configuration in which “the outer surface plate of the surface member is made of a stainless alloy or an aluminum alloy having excellent damage resistance”. You can also.

  According to the noise absorption type snow melting panel for railways of the present invention, the outer surface plate of the surface member is made of stainless steel or aluminum alloy having excellent damage resistance, so that the surface thereof has excellent damage resistance. In particular, when used in a high-speed railway vehicle that is highly likely to be damaged, it can be made more durable. In addition, since it is excellent also in corrosion resistance when it is set as a stainless steel alloy, the surface coating can be made unnecessary and the cost concerning coating can be reduced.

  In addition to the above-described structure, the railway noise absorption type snow melting panel according to the present invention is “the heating means has a heat resistance of 80 to 200 ° C. and is bonded and fixed by an adhesive having excellent thermal conductivity. Can be configured.

  Here, the “adhesive” is not particularly limited as long as it is excellent in heat resistance at 80 to 200 ° C., and an adhesive whose thermal conductivity is enhanced by containing a predetermined metal powder is used. It is desirable. The lower limit of the heat-resistant temperature is set to 80 ° C. or higher, because the temperature of the heating means may rise to around 100 ° C., and in order to maintain sufficient adhesiveness at that time, the upper limit is set to 200 ° C. or lower. This is because an adhesive having higher heat resistance becomes expensive and the bonding cost increases.

  According to the railway noise absorption type snow melting panel of the present invention, the heating means is bonded and fixed to the inner surface plate with an adhesive having excellent heat resistance and thermal conductivity, thereby securely fixing the heating means to the inner surface plate. be able to. In addition, when a heating means having a circular cross section is used, the adhesive can increase the substantial contact area capable of heat conduction between the heating means and the inner surface plate, thereby improving the thermal conductivity. And the snow melting effect can be enhanced.

  In addition to the above configuration, the railway noise absorption type snow melting panel according to the present invention has a configuration of “further including a belt-like presser plate that can be fixed by the clamping with the inner surface plate”. You can also.

  According to the railway noise absorption type snow melting panel of the present invention, it is provided with a belt-like presser plate that presses the heating means against the inner surface plate, whereby the heating means can be surely brought into contact with the inner surface plate. Therefore, the heat from the heating means can be reliably transmitted to the inner surface plate. In addition, when fixing the heating means with an adhesive or the like, it is necessary to apply the adhesive to the bonding surface of the heating means or the inner surface plate. Since the heating means can be easily fixed simply by making it, it is possible to simplify the labor required for fixing the heating means. Note that when the presser plate has good thermal conductivity, heat from the heating means can be transmitted through the presser plate, and the transmission efficiency can be further increased. Further, the presser plate can be fixed to the inner surface plate by a known method such as rivet or screw. Furthermore, you may make it fix a heating means together with an adhesive agent.

  In addition to the above configuration, the railway noise absorption type snow melting panel according to the present invention includes a “linear shape made of a stainless alloy that can be fixed to the inner surface plate by inserting the through hole in the inner surface plate. It is also possible to adopt a configuration that further includes a fixing member.

  Here, the “fixing member” may be any member that can fix the heating means by being inserted into the through hole. For example, “a member that can fix the heating means by forming an annular shape (winding a wire) And the like that are fixed by the above) "," stapler-like ", and the like.

  According to the railway noise absorption type snow melting panel of the present invention, the heating means is fixed using the through hole of the inner surface plate by the linear fixing member, thereby fixing the heating means by a simple operation. Can do.

  In addition to the above-described configuration, the railway noise absorption type snow melting panel according to the present invention includes the following: “The heating means has a cylindrical outer tube portion having an outer shape of 1 to 3 mm and made of a stainless alloy, and an inner portion of the outer tube portion. And a linear heating element that is covered with the insulating material and disposed at the approximate center of the outer cylinder portion.

  Here, as the “cylindrical outer cylinder portion”, a round pipe having a circular cross section or a square pipe having a square cross section may be used. Since the contact area is wider than that of the round pipe, the thermal conductivity can be increased. The reason why the outer shape is set to 1 to 3 mm is that if it is smaller than this, the calorific value becomes small and a sufficient snow melting effect cannot be obtained. If it is larger than this, the ratio of blocking the through hole of the inner surface plate is large. This is because the desired sound absorption characteristics cannot be obtained. In addition, the space | interval of this heating means can be suitably set according to the balance between the snow melting effect and the sound absorption characteristics, depending on the environment in which the railway noise absorption type snow melting panel is used.

  According to the noise absorption type snow melting panel for railways of the present invention, the heating means has a form in which a linear heating element covered with an insulating material is provided in the outer cylinder portion, and the heating means is relatively It can be made inexpensive and the cost can be reduced.

  In addition to the above-described structure, the railway noise absorption type snow melting panel according to the present invention includes the following: “The heating means is a mica plate sandwiching a heating element, and the width is 5 to 15 mm and the thickness is 1 to 3 mm. It is possible to adopt a “configured” configuration.

  According to the noise absorption type snow melting panel for railways of the present invention, the heating means is provided with a mica plate, so that the heat generation width is widened compared to the heating means provided with the outer cylinder portion. It is possible to widen the fixing interval of the heating means, and it is possible to reduce the number of heating means and suppress an increase in cost. The reason why the width is 5 to 15 mm is that if it is smaller than this, a sufficient calorific value cannot be obtained, and if it is larger than this, the ratio of blocking the through hole of the inner surface plate is increased, and the desired This is because sound absorption characteristics cannot be obtained. In addition, the space | interval of this heating means can be suitably set according to the balance between the snow melting effect and the sound absorption characteristics, depending on the environment in which the railway noise absorption type snow melting panel is used. Further, the thickness is set to 1 to 3 mm because a sufficient amount of heat generation cannot be obtained if the thickness is smaller than this, and if the thickness is larger than this, the gap between the surface member and the sound absorbing member becomes large. This is because the overall thickness increases, and the space behind the skirt of a railway vehicle becomes unnecessarily narrow.

  As described above, according to the present invention, it is possible to provide a railway noise absorption type snow melting panel that can be suitably used for a railway vehicle and the like, can prevent snow and icing, and can absorb noise.

  Hereinafter, a railway noise absorption type snow melting panel, which is the best mode for carrying out the present invention, will be described in detail with reference to FIGS. FIG. 1A is a perspective view showing a railway vehicle equipped with the railway noise absorption type snow melting panel of the present invention, and FIG. 1B is a schematic cross-sectional view of the lower part of the vehicle body in the railway vehicle shown in FIG. FIG. 2 is a cross-sectional view showing an example of a railway noise absorption type snow melting panel according to the present invention. FIG. 3 is a perspective view of the railway noise absorption type snow melting panel shown in FIG. FIG. 4 is a front view schematically showing the arrangement of the heating means in the railway noise absorption type snow melting panel of FIG. FIG. 5 is a graph showing the temperature distribution of the railway noise absorption type snow melting panel shown in FIG.

  The railway noise absorption type snow melting panel 10 of the present embodiment is mainly used for a lower body 2 of a vehicle body surface of a high-speed railway vehicle 1 as a railway vehicle, for example, as shown in FIG. Are installed so as to cover the left and right sides of the floor and the lower side of the underfloor device 3 to absorb noise from the underfloor device 3 and the surroundings of the carriage. In addition, the code | symbol 4 in a figure is a trolley | bogie cover.

  As shown in FIGS. 2 and 3, the railway noise absorption type snow melting panel 10 includes an outer surface plate 12 and an inner surface plate 13 having a plurality of through holes 11, and the outer surface plate 12 on one side and the inner surface plate 13 on the other side. A surface member 15 comprising a honeycomb core 14 to be bonded, a rod-shaped heating means 16 fixed to the surface of the inner surface plate 13 of the surface member 15 at a predetermined interval, and on the opposite side of the surface member 15 across the heating means 16 And a plate-like sound absorbing member 17 having a sound absorbing characteristic.

  In addition to the surface member 15, the heating means 16, and the sound absorbing member 17, the railway noise absorbing snow melting panel 10 covers the outer surface of the sound absorbing member 17 and has a breathable waterproof sheet 18, the surface member 15 and the waterproof member. It further includes liquid guiding means 19 disposed between the sound absorbing member 17 covered with the sheet 18 and guiding the invading liquid downward. In this example, the liquid guiding means 19 is also provided between the sound absorbing member 17 and the waterproof sheet 18 on the surface member 15 side.

  The outer surface plate 12 of the surface member 15 is made of a stainless alloy having excellent damage resistance, and the inner surface plate 13 and the honeycomb core 14 are made of an aluminum alloy. In this example, 2000 series aluminum alloy (so-called duralumin) is used. Thereby, it has sufficient strength and rigidity against an impact during high-speed running of the high-speed railway vehicle 1 and has air permeability through the through holes 11 of the outer surface plate 12 and the inner surface plate 13. Note that at least one of the inner surface plate 13 and the honeycomb core 14 may be a copper alloy, and the thermal conductivity from the heating means 16 can be increased.

  Further, as shown in the figure, the surface member 11 has a through hole 11 formed in the outer plate 12 and the inner plate 13, and the through hole 11 formed in the inner plate 13 has a larger diameter. Incidentally, the diameter of the through hole 11 of the outer plate 12 is about 1.5 mm, the diameter of the through hole 11 of the inner plate 13 is about 3 mm, and the thickness of the outer plate 12 and the inner plate 13 is about 1 mm. In addition, the opening ratio of the through holes 11 in the outer surface plate 12 and the inner surface plate 13 is about 33%, respectively. In this example, the thickness of the surface member 15 is about 6 mm. Further, the surface member 15 is subjected to a phosphoric acid fluorine oxide film treatment (phosphoric acid anodizing treatment) on its surface, and an epoxy primer for adhesion pretreatment and corrosion prevention is applied to improve weather resistance and paintability. It is excellent.

  As shown in an enlarged view in FIG. 2, the heating means 16 includes a cylindrical outer cylinder portion 20, an insulating material 21 disposed inside the outer cylinder portion 20, and an insulating material 21 covered with the insulating material 21. The linear heating element 22 is arranged at substantially the center. In this example, the outer diameter of the outer tube portion 20 is 1 to 3 mm, and the material thereof is a stainless alloy. In this example, it is assumed that two linear heating elements 22 are arranged inside the outer cylindrical portion 20.

  The heating means 16 has heat resistance between 80 to 200 ° C., and the adhesive 23 whose thermal conductivity is increased by adding a predetermined metal powder or the like to the surface of the inner surface plate 13 in the surface member 15. Bonded and fixed. Thereby, even if the contact area between the heating means 16 and the inner surface plate 13 is small, the adhesive 23 can increase the substantial contact area capable of conducting heat.

  The heating means 16 is also fixed to the inner surface plate 13 by a linear fixing member 24 made of a stainless alloy. Specifically, by inserting the fixing member 24 into the through hole 11 of the inner surface plate 13. By surrounding the heating means 16 in an annular shape, the heating means 16 is fixed to the inner surface plate 13. The fixing member 24 may be a stapler having a substantially U-shaped cross section, and the heating unit 16 may be fixed using a tool such as a tucker.

  It is desirable that the heating means 16 be arranged at a predetermined interval along the inner surface plate 13, and the long heating means 16 may be fixed in a meandering manner at a predetermined interval as shown in FIG. . Incidentally, it is desirable that the predetermined interval is 50 to 100 mm.

  In this example, the sound absorbing member 17 is a foamed resin obtained by foaming a nonflammable resin such as a phenol resin at a predetermined magnification, and the inside thereof is an open cell, that is, a state in which the spaces formed by the bubbles communicate with each other without being independent. The incident noise is scattered and irregularly reflected, and the energy is attenuated, so that it can be efficiently absorbed. Incidentally, the thickness of the sound absorbing member 17 of this example is about 20 mm. The thickness of the sound absorbing member 17 is preferably in the range of about 15 to 50 mm, and is preferably thicker.

  In this example, the shape of the sound absorbing member 17 is retained by the shape retaining means 25, and the shape retaining means 25 is a member formed in a honeycomb shape, By embedding, the shape of the sound absorbing member 17 is maintained and the sound absorbing member 17 is given rigidity. In this example, the shape retaining means 25 having a predetermined thickness is embedded from both surfaces of the sound absorbing member 17, and the embedded shape retaining means 25 are formed so as not to contact each other inside the sound absorbing member 17. The shape-retaining means 25 are in contact with each other to prevent the sound-absorbing member 17 from being divided by the honeycomb core of the shape-retaining means 25 and preventing the sound-absorbing member 17 from being retained.

  Although not shown, the waterproof sheet 18 is composed of a thin film resin sheet having a large number of ultrafine holes through which liquid does not permeate, and a protective member such as a cloth that holds the resin sheet. Is used on the front side. In this example, the trade name “GORE-TEX” is used as the waterproof sheet 18.

  As shown in FIG. 3, the liquid guiding means 19 is a mesh member having a mesh of a predetermined size. In this example, the liquid guiding means 19 is a nylon mesh having a thickness of about 1 mm. Although the illustration is omitted, the thickness is not constant, but changes so as to wave within a predetermined range, and a predetermined space is formed in a thin portion. In this example, the liquid guiding means 19a between the surface member 15 and the sound absorbing member 17 covered with the waterproof sheet 18 is disposed so that the direction in which the cells are arranged is an oblique direction. Is easily guided downward. Further, in this example, the liquid guiding means 19b between the waterproof sheet 18 and the sound absorbing member 17 is shown so that the grids are arranged in the vertical and horizontal directions, but as with the liquid guiding means 19a, You may arrange | position so that it may rank with diagonal.

  Note that the railway noise absorption type snow melting panel 10 of the present example is mounted on the lower body 2 of the high-speed railway vehicle 1 by a holding member 26, and this holding member 26 has a front side (upper side in FIG. 2). ) Is opened, and the back side is closed, and the frame is in the form of a frame. On the inner periphery of the side surface, a first groove 27 for holding the surface member 15 and a lower side of the first groove 27 are arranged. A second groove 28 for holding the sound absorbing member 17 is formed. The surface member 15 and the sound absorbing member 17 are fitted and held in the first groove 27 and the second groove 28, respectively. The holding member 26 is attached to the lower part 2 of the vehicle body of the high-speed railway vehicle 1 by an appropriate method.

  Next, the operation of the railway noise absorption type snow melting panel 10 of the present embodiment will be described. First, by supplying predetermined electric power to the linear heating element 22 in the heating means 16, the linear heating element 22 generates heat and is transmitted to the outer cylinder portion 20 through the insulating material 21. Since the outer surface of the outer cylinder portion 20 is in contact with the surface of the inner surface plate 13 and is bonded and fixed by the adhesive 23, the outer cylinder portion 23, that is, the heating is interposed between the portion in contact with the inner surface plate 13 and the adhesive 23. Heat from the means 16 is transferred to the inner plate 13.

  The inner surface plate 13 has a temperature distribution as shown by a dotted line in FIG. 5, and a difference between a high temperature portion and a low temperature portion is large. The heat transmitted to the inner surface plate 13 is diffused in the surface direction of the inner surface plate 13 and is also transmitted to the surface direction, so that the temperature of the inner surface plate 13 becomes substantially uniform. Then, the honeycomb core 14 bonded and fixed to the inner surface plate 13 transfers the heat substantially uniformed in the inner surface plate 13 to the outer surface plate 12, whereby the temperature distribution on the surface of the outer surface plate 12 is shown in FIG. As indicated by the solid line, the difference between the high temperature portion and the low temperature portion becomes small, and the temperature distribution on the surface of the outer plate 12 becomes substantially uniform.

  Thus, according to the noise absorption type snow melting panel 10 for railways of this embodiment, the temperature distribution is substantially uniform on the surface of the outer plate 12, and the surface temperature unevenness can be reduced as much as possible. It is possible to prevent snow and ice from adhering to the surface.

  Further, even if the heating means 16 is arranged and fixed at a predetermined interval that does not affect the noise passage by the surface member 15, the temperature distribution on the surface can be made substantially uniform, so that a desired snow melting effect is obtained. At the same time, the sound absorption characteristics as a noise absorbing panel can be maintained, and when used in a railway vehicle in a cold region, the noise can be effectively reduced even during snowfall.

  The present invention has been described with reference to preferred embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention as described below. And design changes are possible.

  That is, in this embodiment, as the surface member 15, the outer surface plate 12 is made of a stainless alloy and the inner surface plate 13 is made of an aluminum alloy. However, the present invention is not limited to this, and the outer surface plate 12 and the inner surface plate 13 are not limited thereto. Both may be made of an aluminum alloy, and the heat efficiency from the heating means 16 can be further increased by making the outer plate 12 an aluminum alloy having a thermal conductivity superior to that of a stainless steel alloy. FIG. 6 shows the temperature distribution of the outer plate and the inner plate made of an aluminum alloy. Measured under the condition of no air in which 12 heating means are arranged in about 1 m and the outside air temperature is set to −10 ° C. It is a thing. As can be seen from the figure, the temperature distribution on the surface becomes substantially uniform, and a temperature at which snow can be sufficiently melted can be obtained. If the inner surface plate 13 is made of a copper alloy having excellent thermal conductivity, the temperature distribution on the surface can be made uniform and the thermal efficiency can be increased.

  Further, in the present embodiment, the heating means 16 is shown in which the linear heating element 22 is disposed in the cylindrical outer cylinder portion 20 made of a stainless alloy. However, the present invention is not limited to this, and for example, FIG. 7 (A), a heating means 32 in a form in which a belt-like heating element is sandwiched between mica plates may be used. According to this heating means 32, compared with the above-mentioned 16 heating means, the heat generation width can be widened, the fixing interval of the heating means 32 can be widened, and the number of heating means 32 can be reduced. Thus, the increase in cost can be suppressed, and the interval between the heating means 32 is widened. Therefore, the ratio of closing the through holes 11 of the inner surface plate 13 is reduced, and the influence on the sound absorption characteristics is reduced as much as possible. can do. The heating means 32 preferably has a width of 5 to 15 mm and a thickness of 1 to 3 mm, thereby reliably obtaining the railway noise absorption type snow melting panel 10 having the above-described effects. be able to.

  The heating means 32 may be fixed to the inner surface plate 13 by using the adhesive 23 as in the above embodiment, but as shown in FIG. The heating means 32 may be fixed to the inner surface plate 12 by pressing the heating means 32 against the inner surface plate 12. The presser plate 33 is fixed to the inner surface plate 12 by a fixing tool 34 such as a rivet or a screw. Reference numeral 34 in the figure denotes a wiring 35 for energizing the heating element 30. By using this presser plate 33, it is possible to simplify the labor required for fixing the heating means 32 as compared with the case where the adhesive 23 is used.

  Furthermore, in this embodiment, although the thing using the noise absorption type snow melting panel 10 for railroads for the railway vehicle was shown, it is not limited to this, For example, it may be used for the soundproof wall provided along a railroad track. It is possible to achieve the same effects as described above.

(A) is a perspective view which shows the railway vehicle equipped with the noise absorption type snow melting panel for railways of this invention, (B) is a schematic sectional drawing of the vehicle body lower part in the railway vehicle shown to (A). It is sectional drawing which shows an example of the noise absorption type snow melting panel for railways which concerns on this invention. It is a perspective view which notches and shows a part of noise absorption type snow melting panel for railroads shown in FIG. It is a front view which shows roughly arrangement | positioning of the heating means in the noise absorption type snow melting panel for railways of FIG. It is a graph which shows the temperature distribution of the noise absorption type snow melting panel for railways shown in FIG. It is a graph which shows the temperature distribution of the noise absorption type snow melting panel for railways of embodiment different from what is shown in FIG. (A) is sectional drawing which shows the heating means of a form different from what was shown in FIG. 2, (B) is a front view which shows the press plate in this invention. (A) is explanatory drawing which shows the problem of the noise in the conventional railway vehicle, (B) is sectional drawing which shows the conventional sound absorption panel. It is a perspective view which shows the conventional sound absorption panel different from FIG. It is sectional drawing which shows the prior application goods as a conventional noise absorption panel further different from FIG. It is a graph which shows the temperature distribution of what fixed the heating means to the back side of an outer surface board as a comparison of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Railway noise absorption type snow melting panel 11 Through-hole 12 Outer surface board 13 Inner surface board 14 Honeycomb core 15 Surface member 16 Heating means 17 Sound absorbing member 20 Outer cylinder part 21 Insulating material 22 Linear heating element 23 Adhesive 24 Fixing member 30 Heating element 31 Mica plate 32 Heating means 33 Presser plate

Claims (8)

A surface member comprising an outer surface plate and an inner surface plate having a plurality of through holes, and a honeycomb core bonded to the outer surface plate on one side and the inner surface plate on the other;
A rod-like or plate-like heating means fixed at a predetermined interval to the inner surface plate surface of the surface member;
A noise absorption type snow melting panel for railways, comprising a plate-like sound absorbing member disposed on the opposite side of the surface member with the heating means interposed therebetween, and having sound absorbing characteristics.   The railway noise absorption type snow melting panel according to claim 1, wherein at least the inner surface plate of the surface member is made of an aluminum alloy or a copper alloy.   3. The railway noise absorption type snow melting panel according to claim 1, wherein the outer surface plate of the surface member is made of a stainless alloy or an aluminum alloy having excellent damage resistance. 4.   The said heating means has 80-200 degreeC heat resistance, and is adhesive-fixed with the adhesive agent excellent in heat conductivity, The any one of Claim 1- Claim 3 characterized by the above-mentioned. Noise absorbing snow melting panels for railways.   The railway noise absorption type according to any one of claims 1 to 4, further comprising a belt-like pressing plate capable of fixing the heating means by being sandwiched between the inner surface plates. Snow melting panel.   6. A linear fixing member made of a stainless alloy that can fix the heating means to the inner surface plate by being inserted into the through hole of the inner surface plate is further provided. The noise absorption type snow melting panel for railways according to any one of the above. The heating means includes
A cylindrical outer tube portion made of a stainless alloy with an outer shape of 1 to 3 mm;
An insulating material disposed inside the outer tube portion;
The railway heating apparatus according to any one of claims 1 to 6, characterized in that the railway heating element is composed of a linear heating element that is covered with the insulating material and disposed at substantially the center of the outer cylinder portion. Noise absorbing snow melting panel. The heating means includes
It consists of a mica board which pinched | interposed the heat generating body, The width | variety is 5-15 mm, and thickness is 1-3 mm, The railway use as described in any one of Claim 1-6 characterized by the above-mentioned Noise absorbing snow melting panel.

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