JPH035502A - Soundproofing of track and device therefor - Google Patents

Abstract

PURPOSE:To absorb a noise of a train by fastening a bulkhead in parallel with a strut, on an upper surface of a support part of a rail composed of the strut on the lower side of a contact on which an iron wheel abuts, and of the wide support part situated on the lower side of the strut, and by filling a sound absorbing material in a space part between the rail and the bulkhead. CONSTITUTION:On an upper surface of a support part 3 of a rail R composed of a strut 2 that extends to the lower side of a contact 1 on which an iron wheel of a train abuts, and of a wide support part 3 situated on the lower side of the strut 2, a bulkhead 5 running upward almost in parallel with the strut 2 is fastened. On a space part surrounded by the rail R and the bulkhead 5, a sound absorbing material 7 is filled, so as to form a soundproofing device of a track. As the sound absorbing material 7, a liquid such as oil or water, or a granular body such as sand and rubber particle is used, by which contact between an iron wheel of a train and a rail R, as well as noise due to the vibration of the rail R are absorbed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a track soundproofing method that can effectively reduce noise caused by contact between railway rails and iron wheels of trains and vibrations of the rails when trains, etc. are running at high speed. and its apparatus.

The railway rails that have been commonly used in the past are the 4th rails.
As shown in the cross-sectional view of the figure, there is a contact part 1 that the iron wheels of the train come into contact with while rotating, a support part 2 connected to the lower side of this contact part 1, and a wide support part 3 located below this support part 3. The support part 3 is firmly fixed to a sleeper (not shown) with dog nails or the like.

It is known that when a train runs at high speed on such regular rails, a large amount of noise is generated outward due to the contact between the steel wheels and the rails and the vibrations of the rails. Since noise pollution causes noise pollution to surrounding residents, measures such as installing soundproof walls along the rails, improving the vertical grain of the rails, and incorporating noise reduction mechanisms have not been considered in the past.

As shown in FIG. 5, the support section 2 and support section 3 of the rail
A means for coating the outer surface of the vibration isolating material 4 such as synthetic resin is adopted. By covering with such a vibration isolating material 4, it is possible to suppress at least some noise caused by the vibration of the rail.

However, conventional soundproofing measures for tracks, such as installing soundproof walls, improving rail joints, and incorporating noise reduction mechanisms, have limited noise prevention effects, especially on Shinkansen trains. Other high-speed railways have been unable to clear the minimum noise level of 80 phon, creating a problem in which they create loud noises that threaten the health of nearby residents.

Furthermore, as shown in FIG. 5, even in an example in which the outer surfaces of the rail support section 2 and support section 3 are coated with a vibration isolating material 4 such as a synthetic resin, vibrations caused by rail vibration may occur. It is impossible to effectively suppress the generation of such noise, and the problem is that the noise pollution continues to be dispersed.

Therefore, the present invention solves the problems of conventional track soundproofing means and provides a track that can effectively reduce noise caused by contact between iron wheels and rails and vibration of the rails. The object of the present invention is to provide a soundproofing method and a device therefor.

In order to achieve the above-mentioned object, the present invention first includes a support section connected to the lower side of the contact portion where the iron wheels of the train come into contact, and a wide support section located below the support section. A bulkhead extending upward substantially in parallel with the support section is fixed to the upper surface of the supporting section of the configured rail, and a sound absorbing material is filled in the space surrounded by the rail and the bulkhead, thereby making it possible to connect to the iron wheels of the train. Provided is a method for soundproofing a track, characterized in that noise caused by contact with a rail and vibration of the rail is absorbed by the sound absorbing material.

Furthermore, according to claim 2, a contact portion where the iron wheels of one train come into contact;
A rail configured by a support section extending below the contact portion and a wide support section located below the support section;
A track comprising a partition wall fixed to the upper surface of the support part of the rail and extending upward substantially parallel to the support part, and a sound absorbing material filled in a space surrounded by the partition wall and the rail. This is the structure of the soundproofing device.

Further, a waterproof material made of a rubber plate or the like is stretched inside the partition wall, and the sound absorbing material is a liquid such as oil or water or a granular material such as sand grains or rubber grains. .

Further, the struts constituting the rail are divided into two parts, the spacing between the r4 struts is kept constant, and the hollow part formed between the two struts is filled with a sound absorbing material. Alternatively, the inside of the hollow part may be kept in a vacuum state.

ShoyaAccording to such a track soundproofing method and device, when noise is generated due to contact between the iron wheels of the train and the rail and vibration of the rail during high-speed running of the train, this noise is transmitted to the support section. Sound is efficiently absorbed based on the effect of the sound-absorbing material filled between the rail and the bulkhead that extends upward in a substantially parallel manner, making it possible to reduce the noise emitted to the outside, making it ideal for high-speed railways. However, it is possible to clear the minimum noise level of 80 phon.

Furthermore, the pillars constituting the rail are divided into two parts, and the spacing between the pillars is maintained constant, and
By filling the hollow space formed between the pillars with sound-absorbing material, or by maintaining the inside of the hollow space in a vacuum state, the sound-absorbing material is able to connect the inside and outside of the rail. Since it is present in both areas, it is possible to increase the noise reduction efficiency.

Various embodiments of the track soundproofing method and device thereof according to the present invention will be described in detail with reference to the drawings, in which the same reference numerals are given to the same components as in the conventional structure.

FIG. 1 shows a first embodiment of the present invention, and the rail R shown as a whole includes a contact part 1 on which the iron wheels of a train come into contact, a support part 2 connected to the lower side of the contact part 1, and a support part 2 connected to the bottom of the contact part 1. It is composed of a support section 2 and a wide support section 3 located below the support section 2.

On the upper surface of this support portion 3, slopes 3a, 3a with downward slopes are formed on both sides of the support portion 2 as a center. At both left and right ends of these slopes 3a, 3a, there are partition walls 5, 5 in the shape of a disconnection.
are arranged, and the base portions 5a, 5a of the partition walls 5.5 are fixed to one end portion on the slopes 3a, 3a by means such as welding.

The partition wall 5.5 is set to extend upward substantially parallel to the support column 2. In the illustrated example, the partition wall 5.5 is installed obliquely upward, that is, in a direction slightly away from the support column 2. There is.

Furthermore, a waterproof material 6.6 made of a rubber plate or the like is stretched inside the partition wall 5.5. As shown in FIG. 2, the top part 6a of the waterproof material 6 may be bent outward and wrapped around the top part of the partition wall 5.

Note that the above-mentioned waterproof material 6 is not essential, and may be attached as necessary.

In this way, a space surrounded by the rail R and the partition wall 5.5 is formed around the rail R, but in the case of the present invention, a predetermined sound absorbing material 7 is filled in this space. ing. As the sound absorbing material 7, a liquid such as oil or water or a granular material such as sand grains or rubber grains can be used. In addition, when using liquid as the sound absorbing material 7, it is necessary to pay attention to the increase or decrease of the water level, and when using granular material, it is necessary to prevent the granular material from touching the iron wheels of the train. is necessary.

According to such a configuration, even when noise is generated due to contact between the iron wheels of the train and the rail R and vibration of the rail R during high-speed running of the train, this noise is absorbed by the action of the sound absorbing material 7. Since sound is efficiently absorbed based on It becomes possible to clear the phone.

FIG. 3 shows a second embodiment of the present invention, in which the basic structure regarding the partition wall 5 and the waterproof material 6, which constitute the main parts of the invention, is the same as that of the first embodiment. It is indicated with a symbol. In the case of this example, the pillar part 2 constituting the rail R is divided into two parts, a pillar part 2a and a pillar part 2b, and is appropriately tightened using bolts 8 and nuts 9. 2b is maintained constant, and a washer 10 is fitted into the lower end of a hollow portion formed between the support pillars 2a and 2b. Furthermore, the hollow part is filled with the same sound absorbing material 7 as described above, or the inside of the hollow part is kept in a vacuum state. Note that 11 is a metal fitting for connecting to a pressure regulating needle valve (not shown) that detects the degree of vacuum within the hollow portion.

According to the second embodiment, the noise caused by the contact between the rail R and the iron wheels of the train is dispersed to the two legs, and at the same time, due to the synergistic effect of the sound absorption effect of the sound absorbing material 7 and the sound absorption effect of the vacuum, the noise caused by the contact between the rail R and the iron wheels of the train is dispersed. Noise caused by contact with the rail R and vibration of the rail R is absorbed by the sound absorbing material 7 on both sides of the rail R or by vacuum suction, making it possible to further improve noise reduction efficiency.

Furthermore, in the case of this second embodiment, since the hollow part can be used as a liquid tank, for example, warm water or antifreeze liquid can be filled in the hollow part, and this liquid can be used to cool the rails in the summer. It is possible to have a warming effect in winter.

As explained in detail above, according to the method and device for soundproofing a track according to the present invention, first of all, according to claim 1, there is provided a strut portion continuous to the lower side of the contact portion where the steel wheels of the train come into contact; A partition wall extending upward substantially parallel to the support portion is fixed to the upper surface of the support portion of the rail constituted by a wide support portion located below the support portion, and the partition wall is surrounded by the rail and the partition wall. Provided is a soundproofing method for a track, in which a sound absorbing material is filled in a space portion of a train, and noise caused by contact between a train wheel and a rail and vibration of the rail is absorbed by the sound absorbing material. The rail consists of a contact part where the iron wheels of the train come into contact, a support part connected to the bottom of the contact part, a wide support part located below the support part, and a support part of the rail. A soundproofing device for a track includes a bulkhead fixed to the upper surface and extending upward substantially parallel to the support column, and a sound absorbing material filled in a space surrounded by the bulkhead and the rail. It is.

Further, a waterproof material made of a rubber plate or the like is stretched inside the partition wall, and the sound absorbing material is made of a liquid such as oil or water or a granular material such as sand grains or rubber grains. Further, the pillars constituting the rail are divided into two parts, the spacing between the pillars is kept constant, and a sound absorbing material is filled in the hollow part formed between the two pillars. Alternatively, since the inside of the hollow part is kept in a vacuum state, the following effects are brought about. In other words, even when noise is generated due to contact between the iron wheels of the train and the rails and vibrations of the rails when the train is running at high speed, this noise is generated between the rail and the bulkhead that extends upward approximately parallel to the support section. Since sound is effectively absorbed based on the action of the sound-absorbing material filled in, it is possible to reduce the noise emitted to the outside, and even in the case of high-speed railways, it is possible to reduce the noise level to the minimum level. It becomes possible to clear a certain 80 phon.

Furthermore, by dividing the pillars constituting the rail into two parts and filling the hollow space formed between the two pillars with sound-absorbing material or keeping it in a vacuum state, the rails and the train's iron wheels can be easily separated. It is possible to disperse the noise caused by the contact between the two legs, and also to increase the noise reduction efficiency by 4° based on the effect of the sound absorbing material located on the same side of the rail.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a main part showing a first embodiment of the track soundproofing method and device according to the present invention, FIG. 2 is a partial cross-sectional view showing a modification of FIG. 1, and FIG. FIG. 4 is a cross-sectional view of a main part showing a second embodiment of the invention, FIG. 4 is a cross-sectional view showing the shape of a normal rail, and FIG. 5 is a cross-sectional view showing an example of a conventional soundproofing device. Fig. 4 1...Contact part 2゜3...Support part 3 5...Partition wall 5 6...Waterproofing material 6 7...Soundproofing material 1 2a, 2b...Strut part a... Slope a...Base a...Top 0...Washer Fig. 5

Claims (5)

[Claims] (1) The support part is attached to the upper surface of the support part of the rail, which is constituted by a support part continuous to the lower side of the contact part where the iron wheels of the train come into contact, and a wide support part located below the support part. A bulkhead extending upward approximately parallel to the rail is fixed, and a space surrounded by the rail and the bulkhead is filled with a sound-absorbing material to prevent noise caused by contact between the iron wheels of the train and the rail and vibration of the rail. A method for soundproofing a track, characterized in that noise is absorbed by the sound absorbing material. (2) A rail consisting of a contact part where the iron wheels of the train come into contact, a support part connected to the bottom of the contact part, and a wide support part located below the support part, and support for the rail. A soundproofing device for a track, comprising: a partition wall fixed to the upper surface of the column and extending upward substantially parallel to the support column; and a sound absorbing material filled in a space surrounded by the partition wall and the rail. (3) The track soundproofing method and device according to claim 1 or 2, wherein a waterproof material made of a rubber plate or the like is provided inside the partition wall. (4) The track soundproofing method and apparatus according to claim 1 or 2, wherein the sound absorbing material is a liquid such as oil or water or a granular material such as sand grains or rubber grains. (5) The struts constituting the rail are divided into two parts, the distance between the two struts is kept constant, and the hollow space formed between the two struts is filled with sound-absorbing material. 3. The track soundproofing device according to claim 2, wherein the inside of the hollow portion is maintained in a vacuum state.