JP6161185B2 - Rail soundproof structure - Google Patents

Description

  The present invention relates to a soundproof structure for a rail that reduces noise generated by vibration of the rail.

Soundproofing conventional rail (prior art 1) includes a main vibration damping sheet is adhered to the surface of the abdomen R _W and the bottom R _b of the rail R, the sound absorption mat to be contacted with the surface of the main vibration damping sheet, A secondary vibration damping sheet that is in contact with the surface of the sound absorbing mat, a sound insulation cover that is adhered to the surface of the secondary vibration suppression sheet, and an auxiliary vibration suppression sheet that is adhered to the surface of the sound insulation cover (for example, , See Patent Document 1). In this prior art 1, the sound that is multiple-reflected by the sound insulation cover is absorbed by the sound absorbing mat and the vibration damping effect is exhibited by the vibration damping sheet.

Soundproofing conventional rail (prior art 2) has a sound absorbing mat is pressed against the upper surface of the surface and the bottom R _b abdominal R _W of the rail R, the damping sheet is bonded to the sound-absorbing mat, this damping sheet And a fixing tool having a wire spring that fixes the constraining layer to the rail (see, for example, Patent Document 2). In this prior art 2, the soundproofing device is attached to the rail by the wire spring of the fixture without using bolts or nuts.

Soundproofing conventional rail (prior art 3), a thin-walled damping resin damping material is pressed against the upper surface of the surface and the bottom R _b abdominal R _W of the rail R, the thin-walled damping resin damping And a sound absorbing material made of thick-walled foamed resin that is attached to the material with an adhesive or the like (see, for example, Patent Document 3). In this prior art 3, one type of soundproofing device having the same length is prepared, and both ends of the soundproofing device in the length direction are overlapped.

JP 2007-224700 A

JP 2008-063813 A

JP 2010-242337

In the prior art 1 to 3, and the surface is bonded abdominal R _W and the main vibration damping sheet of the rail R there are fine irregularities, and a sound absorbing mats or thin-walled damping resin damping material directly. Therefore, the conventional art 1-3, the main vibration-damping sheet, which gap is formed between the abdominal R _W of the sound absorbing mats or thin-walled damping resin damping material and the rail R, such as rain water from the gap When entering, rainwater on the surface of the abdomen R _W of the rail R there is a problem that corrosion resulting in the progression of the surface of the abdomen R _W of the rail R stagnating.

  An object of the present invention is to provide a soundproof structure for a rail that can prevent corrosion of the surface of the rail and that can easily manufacture a soundproof material.

The present invention solves the above-mentioned problems by the solving means described below.
In addition, although the code | symbol corresponding to embodiment of this invention is attached | subjected and demonstrated, it is not limited to this embodiment.
The invention of claim 1 is a rail soundproof structure for reducing noise generated by vibration of a rail (R), as shown in FIGS. 3 to 19, and is mounted on the rail to reduce the noise. A soundproof structure for a rail, comprising a material (8), wherein the soundproof material includes a discharge improving layer (9d; 13) that improves the discharge of liquid that enters between the rail and the soundproof material. 7).

  According to a second aspect of the present invention, in the soundproof structure for a rail according to the first aspect, as shown in FIGS. 3 to 7 and FIGS. 11 to 19, the discharge improving layer (9d) is on the side facing the rail. The soundproofing structure of the rail is characterized by being formed integrally with the soundproofing material on the surface of the soundproofing material.

  As for invention of Claim 3, in the soundproof structure of the rail of Claim 1, as shown in FIGS. 8-10, the said discharge | emission improvement layer (13) is a member different from the said soundproof material, The said rail The soundproofing structure of the rail is arranged between the surface (9a) of the soundproofing material on the side opposite to the surface of the rail and the surface of the rail.

  According to a fourth aspect of the present invention, in the soundproofing structure for the rail according to the third aspect, as shown in FIG. 10, the discharge improving layer is separated from the soundproofing material when carried on site, and is attached to the rail. The rail soundproof structure is characterized in that it is joined to the soundproofing material later.

  According to a fifth aspect of the present invention, in the soundproof structure for a rail according to the third or fourth aspect, as shown in FIGS. 8 to 10, the soundproof material has the discharge improving layer after the mounting to the rail. The soundproofing structure of the rail is characterized in that the soundproofing material and the discharge improving layer are joined to each other so as to cover the soundproofing material.

  According to a sixth aspect of the present invention, in the soundproof structure for a rail according to any one of the first to fifth aspects, as shown in FIG. 9, the discharge improving layer is on the side facing the surface of the rail. This is a rail soundproof structure characterized by having a smooth surface.

  A seventh aspect of the present invention is the soundproof structure for a rail according to any one of the first to sixth aspects, wherein, as shown in FIGS. 11 and 12, the soundproof material is improved in the discharge from the rail. A rail soundproof structure comprising an adhesive layer (15) for bonding the rail and the discharge improving layer so that the layer can be peeled off.

  According to an eighth aspect of the present invention, in the soundproof structure for a rail according to any one of the first to seventh aspects, as shown in FIGS. 13 and 14, the soundproof material includes the discharge improving layer and the A rail soundproof structure comprising a corrosion prevention layer (16) for preventing corrosion of the rail between the rail and the rail.

The invention of claim 9 is the soundproof structure of the rail according to any one of claims 1 to 8, as shown in FIG. 16, the anti-sound material, the bottom from the head side of the rail The soundproof structure of the rail is characterized by being formed thicker toward the side.

  A tenth aspect of the present invention is the soundproof structure for a rail according to any one of the first to ninth aspects of the present invention, as shown in FIGS. 3, 6, 8, 11, 13, and 16 to 19. As shown, the soundproofing material includes a vibration isolating material (9) that suppresses the vibration and a sound insulating material (10) that covers the vibration isolating material and blocks the noise, and covers the entire surface of the vibration isolating material. It is a rail soundproof structure characterized by being covered with the sound insulating material.

  According to an eleventh aspect of the present invention, in the soundproof structure for a rail according to any one of the first to ninth aspects, as shown in FIG. 9) and a sound insulating material (10) that covers the vibration isolating material and blocks the noise, and a part of the vibration isolating material is covered with the sound insulating material. .

  According to a twelfth aspect of the present invention, in the soundproof structure for a rail according to the tenth or eleventh aspect, as shown in FIGS. 18 and 19, the soundproofing material is arranged on the inside and / or outside of the sound insulating material. It is a soundproof structure of the rail characterized by including the sound-absorbing material (17) which absorbs.

  According to this invention, corrosion of the surface of the rail can be prevented and a soundproof material can be easily manufactured.

It is a top view which shows the mounting state of the soundproof structure of the rail which concerns on 1st Embodiment of this invention. It is a side view which shows the mounting state of the soundproof structure of the rail which concerns on 1st Embodiment of this invention. It is sectional drawing of the soundproof structure of the rail which concerns on 1st Embodiment of this invention. FIG. 4 is a cross-sectional view schematically showing an enlarged IV portion of FIG. 3. BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing for demonstrating the mounting method of the soundproof structure of the rail based on 1st Embodiment of this invention, (A) is sectional drawing which shows the state which mounted | wore the vibration isolator, (B) is a sound insulating material. It is sectional drawing which shows the state which mounted | wore, (C) is sectional drawing which shows the state fixed by the fixing member. It is sectional drawing of the soundproof structure of the rail which concerns on 2nd Embodiment of this invention. It is sectional drawing which expands and shows typically the VII part of FIG. It is sectional drawing of the soundproof structure of the rail which concerns on 3rd Embodiment of this invention. It is sectional drawing which expands and schematically shows the IX part of FIG. It is sectional drawing for demonstrating the mounting method of the soundproof structure of the rail which concerns on 3rd Embodiment of this invention, (A) is sectional drawing which shows the state which mounted | wore with the discharge | emission improvement layer, (B) is anti-vibration It is sectional drawing which shows the state with which the material was mounted | worn, (C) is sectional drawing which shows the state with which the sound-insulating material was mounted | worn. It is sectional drawing of the soundproof structure of the rail which concerns on 4th Embodiment of this invention. It is sectional drawing which expands and shows typically the XII part of FIG. It is sectional drawing of the soundproof structure of the rail which concerns on 5th Embodiment of this invention. It is sectional drawing which expands and shows typically the XIV part of FIG. It is sectional drawing of the soundproof structure of the rail which concerns on 6th Embodiment of this invention. It is sectional drawing of the soundproof structure of the rail which concerns on 7th Embodiment of this invention. It is sectional drawing of the soundproof structure of the rail which concerns on 8th Embodiment of this invention. It is sectional drawing of the soundproof structure of the rail which concerns on 9th Embodiment of this invention. It is sectional drawing of the soundproof structure of the rail which concerns on 10th Embodiment of this invention.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.
Hereinafter, only one of a pair of parallel rails constituting the track is illustrated, and the other is not illustrated.
The rail R shown in FIGS. 1 to 3 is a member that supports and guides the wheels W of the railway vehicle to run the railway vehicle. The rail R includes a rail head R ₁ that contacts the wheel W of the railway vehicle, a rail bottom (flange) R ₂ attached to the sleeper 1, and a rail abdomen that connects the rail head R ₁ and the rail bottom R _2. and a (web portion) R _3. The wheel W shown in FIG. 3 is a member that makes rotational contact with the rail R. The wheel W includes a tread surface W ₁ that comes into contact with the top surface of the rail head portion R ₁ and receives frictional resistance, and a flange surface W ₂ that is continuously formed on the outer periphery of the wheel W.

The sleeper 1 shown in FIGS. 1 and 2 is a support body that supports the rail R. The rail fastening device 2 is a device for fastening the rail R to the sleeper 1. The rail fastening device 2, for example, sandwiches a track pad (not shown) between the rail bottom R ₂ and the sleeper 1, fastens the rail R to the sleeper 1 with the fastening spring 3, and passes the railcar. Absorbs the generated vibration. As shown in FIGS. 1 and 2, the rail fastening device 2 includes a fastening spring 3 that presses and fastens the rail R, a spring support 4 that supports the fastening spring 3, and a fastening bolt 5 that fastens the fastening spring 3. The washer 6 is sandwiched between the fastening spring 3 and the fastening bolt 5.

  The soundproof structure 7 shown in FIGS. 1 to 4 is a structure that reduces noise generated by vibration of the rail R. The soundproof structure 7 includes a soundproof material 8 and a fixing member 11. The soundproof structure 7 suppresses vibration generated when the vehicle passes on the rail R and reduces rolling noise radiated from the rail R.

1 to 4 is a member that is attached to the rail R to reduce noise. The sound insulation material 8 has a laminated structure of the vibration insulation material 9 and the sound insulation material 10, and is in a state where the vibration insulation material 9 and the sound insulation material 10 are separated at the time of carrying on site. 9 and the sound insulating material 10 are joined. The sound insulating material 8 joins the vibration insulating material 9 and the sound insulating material 10 without using an adhesive. The soundproofing material 8 covers the rail R to suppress the vibration of the rail R and reduce noise generated by the vibration. The soundproofing material 8 covers a part of the rail R except for the part that interferes with the sleeper 1 and the rail fastening device 2 as shown in FIGS. 1 and 2 so that the noise reduction effect is exhibited as much as possible. Yes. As shown in FIG. 3, the soundproof material 8 covers, for example, substantially the entire surface of the rail bottom R ₂ and the rail abdomen R ₃ , and is detachably fixed to the rail R. As shown in FIGS. 1 and 2, the soundproof material 8 is formed to have substantially the same length as the installation interval of the rail fastening device 2 in the length direction of the rail R, and is mounted side by side in the length direction of the rail R. ing. As shown in FIG. 4, the sound insulating material 8 includes a vibration insulating material 9 and a sound insulating material 10. The soundproofing material 8 includes a vibration isolating material 9 on the side facing the rail R, and a sound insulating material 10 on the side opposite to the side facing the rail R (the surface side of the vibration isolating material 9). 9 is covered with a sound insulating material 10. As shown in FIG. 3, the soundproofing material 8 is joined to the soundproofing material 8 so that the soundproofing material 8 covers the soundproofing material layer 9 d after being mounted on the rail R. .

1 to 4 is a member that suppresses vibration of the rail R. The vibration isolating material 9 is a portion constituting the inner layer material of the sound insulating material 8 and is an elastic body having a rigidity lower than that of the sound insulating material 10. The vibration isolator 9 is a soft elastic material that is relatively softer than a rigid body, and has, for example, a Young's modulus of 1.0 × 10 ³ MPa or less at room temperature, preferably also has viscosity, a loss factor of 0.05 or more, and a thickness Is about 1 to 500 mm (in the case of a viscoelastic material, about 10 to 30 mm). Anti-vibration materials 9 are natural rubber, styrene butadiene rubber, ethylene propylene rubber (EPDM), chloroprene rubber, silicone rubber and other closed cell high density foam rubber, natural rubber, styrene butadiene rubber, butyl rubber, ethylene propylene rubber (EPDM) ), Chloroprene rubber, fluoro rubber, silicon rubber, urethane rubber, polynorbornene rubber, vulcanized rubber such as acrylic rubber, styrene, olefin, vinyl chloride TPE (thermoplastic elastomer), polystyrene, polyethylene, polypropylene, chloride Examples thereof include thermoplastic resins such as vinyl and ethylene vinyl acetate copolymer (EVA) resins, gels such as silicon, emulsions such as vinyl acetate, EVA and acrylic resins, and rubber latex. The vibration isolator 9 may be a material having a sound absorbing function that absorbs noise from the rail R. Such a vibration isolator 9 is a soft elastic material or a soft viscoelastic material. The flexible elastic material is preferably a fibrous body made of a thermoplastic resin such as polyethylene or polypropylene, rock wool, glass wool or the like. As the flexible viscoelastic material, foams such as urethane, EPDM, and chloroprene are preferable. Since such foams are viscoelastic bodies having a sound absorbing and damping function, it is possible to expect a damping effect as well as a sound absorbing effect. it can. If the thickness is less than 5 mm, the soundproofing material 9 has a problem that the soundproofing effect is lowered. If the thickness exceeds 100 mm, it interferes with the structure around the rail R and becomes difficult to attach to the rail R. Therefore, it is preferably set to 5 to 100 mm, particularly preferably set to 20 to 40 mm. The vibration isolating material 9 is separated from the sound insulating material 10 at the time of carrying in the field, and is joined to the sound insulating material 10 after being mounted on the rail R. The anti-vibration material 9 includes an inner surface 9a, an outer surface 9b shown in FIG. 4, a discharge hole 9c shown in FIG. 3, a discharge improving layer 9d shown in FIGS.

The inner surface 9a shown in FIG. 4 is a portion joined to the surface of the rail R, and is formed on the surface of the vibration isolator 9 on the side facing the surface of the rail R (the surface of the discharge improving layer 9d). The outer surface 9b is a portion joined to the inner surface 10a of the sound insulating material 10. The discharge hole 9c shown in FIG. 3 is a portion for discharging the liquid that enters between the vibration isolator 9 and the rail R. For example, the discharge hole 9c has a predetermined length in the length direction of the vibration isolator 9 so that liquid such as rainwater entering between the inner surface 9a of the vibration isolator 9 and the surface of the rail R can be discharged to the outside. It is a long hole formed at intervals. Discharge hole 9c is formed to correspond substantially on the center line of the rail bottom R _2.

  The discharge improving layer 9d shown in FIGS. 3 and 4 is a portion that improves the discharge of the liquid that enters the gap between the vibration isolator 9 and the rail R. The discharge improving layer 9d is formed integrally with the soundproofing material 8 on the surface of the soundproofing material 8 facing the rail R. The discharge improving layer 9 d is a skin layer (surface layer portion) generated when the vibration isolator 9 is molded, and has a higher density than the main body portion of the vibration isolator 9. For example, when the vibration isolator 9 is a closed cell high density foamed rubber such as EPDM, the discharge improving layer 9d has a density of the skin layer on the inner surface 9a side of the vibration isolator 9 other than the skin layer. It is formed so as to be higher than the density of the (main body part). The discharge improving layer 9d improves drainage of liquid such as rainwater that enters the gap between the inner surface 9a of the discharge improving layer 9d and the surface of the rail R. The discharge improving layer 9d is shown in FIG. 4 so that a liquid such as rainwater entering between the inner surface 9a of the discharge improving layer 9d and the surface of the rail R flows downward without staying between them. As shown, the surface on the side facing the surface of the rail R is smooth. The emission improving layer 9d has a problem that the soundproofing effect and the durability are lowered when the thickness is less than 0.3 mm. Is preferably set to 0.3 to 5 mm, and more preferably to 1 to 2 mm.

The sound insulating material 10 shown in FIGS. 1 to 4 is a member that blocks noise. The sound insulating material 10 is a portion constituting the outer layer material of the sound insulating material 8 and is an elastic body having higher rigidity than the vibration insulating material 9. The sound insulating material 10 is formed of, for example, a rigid elastic body (high rigidity elastic body) made of a metal or a rigid body having a Young's modulus of 3.0 × 10 ³ MPa or more. The sound insulating material 10 is formed of a hard elastic material having a sound insulating function for blocking noise radiated from the rail R to the outside and a vibration suppressing function for suppressing vibration of the rail R. The sound insulating material 10 is made of a metal such as a thin resin laminated damping steel plate (metallamine manufactured by Nichias Co., Ltd.), a paint hot-dip galvanized steel plate, a highly corrosion-resistant steel plate, or aluminum. Thin plate-shaped damping steel plate consisting of a plate layer and a resin layer such as a chlorinated polyethylene resin (Calmoon sheet (name of product) manufactured by Sekisui Chemical Co., Ltd.), Dampley (name of product) manufactured by Kobe Steel, Ltd. ), Steel-based damping alloys containing chromium, lead, etc., aluminum-based damping alloys containing zinc, etc., or metal plates coated with asphalt-based, acrylic-based, or chloroprene-based damping coatings Fiber Reinforced Plastics (FRP) plates, synthetic resin plates, ordinary steel plates, and ordinary steel plates with galvanized surfaces when used outdoors. The sound insulating material 10 prevents the vibration isolating material 9 from being exposed to direct sunlight and suppresses deterioration due to ultraviolet rays. If the thickness of the sound insulation material 10 is less than 0.5 mm, the sound insulation performance will be reduced, and if it exceeds 10 mm, the bending rigidity and workability will be reduced and the weight will be increased. Since it becomes difficult, it is preferable to set to 0.5 to 10 mm, and it is particularly preferable to set to 0.8 to 0.9 mm. The sound insulating material 10 includes an inner surface 10a shown in FIG. 4, an outer surface 10b, a discharge hole 10c shown in FIG.

  The inner surface 10a shown in FIG. 4 is a portion that is joined to the outer surface 9b of the vibration isolator 9, and the outer surface 10b is a portion that is joined to the inner surfaces of the holding members 11a and 11b. The discharge hole 10c shown in FIG. 3 is a portion for discharging the liquid that enters between the vibration isolator 9 and the rail R. The discharge hole 10c is a length formed at a predetermined interval in the length direction of the sound insulating material 10 so that liquid such as rainwater discharged from the discharge hole 9c on the vibration isolator 9 side can be discharged to the outside. It is a hole. The discharge hole 10c is connected to the discharge hole 9c on the vibration isolator 9 side, and is formed corresponding to the discharge hole 9c so as to coincide with the discharge hole 9c on the vibration isolator 9 side.

  The fixing member 11 shown in FIGS. 1 to 3 is a member that detachably fixes the soundproof material 8 to the rail R. As shown in FIG. 3, the fixing member 11 includes holding members 11a and 11b, a connecting member 11c, and the like. The fixing member 11 is detachably attached to the surface of the sound insulating material 10 of the sound insulating material 8.

  The holding members 11 a and 11 b shown in FIG. 3 are members that hold the soundproof material 8. The holding members 11a and 11b are formed in a shape along the surface shape of the soundproofing material 8 so as to be in close contact with the soundproofing material 8, and have a split structure that can be detachably attached from the left and right side surfaces of the rail R. . The holding member 11 a holds one side surface and one upper surface of the soundproof material 8, and the holding member 11 b holds the other side surface, the other upper surface, and the lower surface of the soundproof material 8. The holding members 11a and 11b are formed of, for example, a thin plate-like dodging plated steel plate or a stainless steel plate. As shown in FIGS. 1 and 2, the holding members 11 a and 11 b have a predetermined interval in the length direction of the soundproof material 8 so that a plurality of the soundproof materials 8 are mounted side by side along the length direction of the rail R. It is installed with a gap. As shown in FIG. 3, the holding member 11a includes a joint portion 11d and a through hole 11f, and the holding member 11b includes a joint portion 11e and a through hole 11g.

  The connecting member 11c is a member that detachably connects the holding member 11a and the holding member 11b. As shown in FIG. 3, the connecting member 11 c is disposed so as to be positioned inside or outside the rail R when the soundproof material 8 is attached to the rail R so that the fastening operation can be easily performed. Yes. The connecting member 11c includes a bolt 11h inserted into the through holes 11f and 11g, and a nut 11i attached to the bolt 11h. The connecting member 11c is provided with a locking prevention structure for preventing the bolt 11h, the nut 11i, and the like from loosening due to the vibration of the rail R.

  The joining portions 11d and 11e are portions where the holding member 11a and the holding member 11b are joined. The joint portion 11d is a flat surface formed at one end portion of the holding member 11a, and the joint portion 11e is a flat surface formed at one end portion of the holding member 11b. The through holes 11f and 11g are portions through which the bolt 11h passes, the through hole 11f is formed in the joint portion 11d, and the through hole 11g is formed in the joint portion 11e.

Next, a method for mounting the soundproof structure for rails according to the first embodiment of the present invention will be described.
As shown in FIG. 5A, the anti-vibration material 9 is carried into the field, and the anti-vibration material 9 is attached to the rail R so that the rail bottom R ₂ and the rail abdomen R ₃ are covered with the anti-vibration material 9. Installing. At this time, the anti-vibration material 9 is cut into an arbitrary shape in the field according to the interval between the sleepers 1 and the anti-vibration material 9 is attached to the rail R, and the surface of the rail R and the discharge improving layer 9d of the anti-vibration material 9 are attached. Is brought into contact with the inner surface 9a. Next, as shown in FIG. 5 (B), the sound insulating material 10 is carried into the site in a state separated from the vibration insulating material 9, and the vibration insulating material 9 is covered with the sound insulating material 10. A sound insulating material 10 is attached to 9. After that, as shown in FIG. 5C, holding members 11a and 11b are mounted so as to sandwich the soundproofing material 8 between the rail R with a predetermined interval in the length direction of the rail R. Next, the bolt 11h is inserted into the through holes 11f and 11g, the nut 11i and the bolt 11h are fastened, and the holding member 11a and the holding member 11b are connected. As a result, the rail bottom R ₂ and the rail abdomen R ₃ are covered by the soundproof material 8, and the soundproof material 8 is fixed to the rail R by the fixing member 11. When exchanging or inspecting the rail R, the soundproof material 8 is removed from the rail R by a procedure reverse to the procedure described above.

Next, the operation of the soundproof structure for rails according to the first embodiment of the present invention will be described.
As shown in FIG. 4, when the wheel W passes on the rail R and the rail R vibrates, the vibration isolating material 9 of the sound insulating material 8 tries to vibrate together with the rail R. When the vibration isolator 9 is formed of a flexible elastic material, a flexible spring having a small spring constant is configured as a dynamic model. As a result, the vibration transmissibility decreases due to the decrease in the spring constant, and the vibration and rolling noise from the rail R are difficult to propagate to the sound insulating material 10. On the other hand, when the vibration isolator 9 is formed of a flexible viscoelastic material, a flexible spring and an attenuator (dashpot) are configured as a dynamic model. For this reason, the vibration transmissibility decreases due to the decrease in the spring constant, and part of the vibration energy of the rail R is converted into thermal energy by the vibration attenuation due to the viscosity, and the vibration of the rail R is absorbed and attenuated. Further, part of the noise energy from the rail R is converted into thermal energy, and the rolling noise from the rail R is absorbed and attenuated. As a result, since the vibration propagating from the rail R to the sound insulating material 10 is reduced, the vibration of the sound insulating material 10 is reduced and the sound emitted from the sound insulating material 10 is reduced. In particular, when a soft viscoelastic material is constrained by the sound insulating material 10, the degree of shear deformation of the vibration isolating material 9 is increased during vibration, so that the internal loss of the viscoelastic material increases and the vibration damping capacity is amplified. Be made. Since the substantially entire surface of the rail R is covered with the soundproofing material 8, the acoustic impedance of the sound emitted from the sound insulating material 10 of the soundproofing material 8 is reduced, the sound power of the rail R itself is reduced, and the soundproofing effect is improved.

  When the emission improving layer 9d shown in FIGS. 3 and 4 does not exist, the surface of the vibration isolator 9 shown in FIG. 4 and the surface of the rail R are in direct contact. There are minute irregularities on the surface of the rail R shown in FIG. 4, and there are also minute irregularities on the surface of the vibration isolator 9. For this reason, when the inner surface of the vibration isolator 9 and the surface of the rail R are in direct contact with each other, a gap is formed between the surface of the vibration isolator 9 and the surface of the rail R. For this reason, when a liquid such as rainwater flows into the gap between the surface of the vibration isolator 9 and the surface of the rail R and the rainwater stays between them, corrosion of the surface of the rail R proceeds.

  On the other hand, when the emission improving layer 9d shown in FIGS. 3 and 4 is present, the smooth inner surface 9a of the emission improving layer 9d and the surface of the rail R are in contact with each other as shown in FIG. As shown in FIG. 4, although there are minute irregularities on the surface of the rail R, the inner surface 9a of the discharge improving layer 9d is formed smoothly. For this reason, even if a liquid such as rainwater flows into the gap between the inner surface 9a of the discharge improving layer 9d and the surface of the rail R, the liquid flows down along the smooth inner surface 9a of the discharge improving layer 9d. As a result, even if a liquid such as rainwater flows into the gap between the inner surface 9a of the discharge improving layer 9d and the surface of the rail R, the rainwater does not stay between them, and corrosion of the surface of the rail R is prevented. The

The rail soundproof structure according to the first embodiment of the present invention has the following effects.
(1) In the first embodiment, the discharge improving layer 9d improves the discharge of the liquid that enters the gap between the anti-vibration material 9 that is attached to the rail R and reduces noise and the rail R. For this reason, when a liquid such as rainwater enters the gap between the surface of the rail R and the inner surface 9a of the discharge improving layer 9d, the rainwater or the like stays in the gap between them, and the surface of the rail R becomes Corrosion can be prevented.

(2) In the first embodiment, a discharge improving layer 9d is formed integrally with the soundproofing material 8 on the surface of the soundproofing material 8 facing the rail R. For this reason, the discharge improvement layer 9d can be integrally molded at the time of manufacture of the soundproofing material 8, and manufacturing cost can be reduced.

(3) In the first embodiment, the inner surface 9a of the discharge improving layer 9d on the side facing the opposite side of the rail R is smooth. For this reason, when a liquid such as rainwater enters the gap between the surface of the rail R and the inner surface 9a of the discharge improving layer 9d, the rainwater etc. flows out smoothly along the inner surface 9a of the discharge improving layer 9d. Can be made.

(4) In the first embodiment, the entire surface of the vibration isolating material 9 is covered with the sound insulating material 10. For this reason, the noise radiated from the vibration isolator 9 to the outside can be reduced by the sound insulator 10.

(Second Embodiment)
In the following, the same parts as those shown in FIGS. 1 to 5 are denoted by the same reference numerals and detailed description thereof is omitted.
The soundproof material 8 shown in FIGS. 6 and 7 includes a vibration-proof material 9, a sound-insulating material 10, an adhesive layer 12, and the like. Unlike the sound-proof material 8 shown in FIGS. 9 and the sound insulating material 10 are joined using an adhesive.

  The adhesive material layer 12 shown in FIGS. 6 and 7 is a portion that bonds the vibration isolator 9 and the sound insulating material 10 after being mounted on the rail R. In order to join the outer surface 9b of the vibration isolator 9 and the inner surface 10a of the sound insulating material 10, the adhesive layer 12 is formed by sticking a double-sided adhesive tape between them. The adhesive layer 12 joins the vibration isolator 9 and the sound insulating material 10 with an adhesive that is exposed from both surfaces of the base material of the double-sided adhesive tape after the release material is peeled from both sides of the double-sided adhesive tape. The adhesive layer 12 is an epoxy resin-based, cyanoacrylate-based, acrylic resin-based, urethane resin-based reactive adhesive, vinyl acetate resin-based adhesive, modified acrylic resin-based emulsion adhesive, chloroprene, silicon, etc. It is preferable to use a hot-melt adhesive such as a synthetic rubber adhesive, an elastomer, and an ethylene vinyl acetate copolymer (EVA).

Next, a method for mounting a soundproof structure for rails according to a second embodiment of the present invention will be described.
Before carrying the vibration isolator 9 shown in FIG. 7 into the field, the release material is peeled off from one surface of the double-sided adhesive tape to expose the adhesive of the adhesive layer 12, and the outer surface 9b of the vibration isolator 9 is exposed. A double-sided adhesive tape is attached with this adhesive. After the vibration isolator 9 is brought into the field and the vibration isolator 9 is mounted on the rail R, the release material is peeled off from the other surface of the double-sided adhesive tape to expose the adhesive of the adhesive layer 12, and the vibration isolator The inner surface 10a of the sound insulating material 10 is joined to the outer surface 9b of the material 9 by this adhesive. As a result, the soundproof material 8 is attached to the rail R.

In addition to the effects of the first embodiment, the soundproof structure for rails according to the second embodiment of the present invention has the effects described below.
In the second embodiment, the vibration damping material 9 and the sound insulating material 10 are bonded to each other after the mounting on the rail R by the adhesive layer 12. For this reason, after the vibration isolator 9 and the sound insulating material 10 are carried into the site, the vibration isolator 9 and the sound insulating material 10 are simply joined and integrated by the adhesive layer 12 so that the sound insulating material 8 can be integrated in a short time. Can be assembled.

(Third embodiment)
The soundproofing material 8 shown in FIG.8 and FIG.9 is provided with the vibration isolating material 9, the sound insulating material 10, the adhesive material layer 12, the discharge | emission improvement layer 13, and the adhesive material layer 14 grade | etc.,. Unlike the soundproofing material 8 shown in FIGS. 1 to 7, the soundproofing material 8 includes a discharge improving layer 13 on the side facing the rail R. The soundproofing material 8 is in a state in which the vibration isolating material 9 and the discharge improving layer 13 are separated from each other when the soundproofing material 8 is brought into the field. As shown in FIG. 8, the soundproofing material 8 is joined to the soundproofing material 8 so that the soundproofing material 8 covers the entire surface of the sounding improvement layer 13 after being mounted on the rail R. become.

  The discharge improving layer 13 shown in FIGS. 8 and 9 is a member that improves the discharge of the liquid that enters the gap between the soundproofing material 8 and the rail R. The emission improving layer 13 is a separate member from the soundproof material 8 and is disposed between the inner surface 9 a of the soundproof material 8 on the side facing the rail R and the surface of the rail R. The discharge improving layer 13 improves drainage of liquid such as rainwater that enters a gap between the surface of the discharge improving layer 13 (the surface on the side opposite to the surface of the rail R) and the surface of the rail R. The discharge improving layer 13 is arranged so that a liquid such as rainwater entering between the surface of the discharge improving layer 13 and the surface of the rail R flows downward without staying between them. The surface on the opposite side is smooth.

  The discharge improving layer 13 is formed in a thin sheet shape having flexibility so that it can be easily wound around the surface of the rail R. The discharge improving layer 13 is formed of a sheet material made of rubbers, polymer materials, synthetic resins, or any composite layer thereof. Examples of such rubbers include vulcanized rubber such as natural rubber, styrene butadiene rubber, butyl rubber, ethylene propylene rubber (EPDM), chloroprene rubber, fluorine rubber, silicon rubber, urethane rubber, polynorbornene rubber, or acrylic rubber. A rubber sheet is preferable. As polymer materials, for example, it is plasticized at a high temperature and can be processed by a processing machine for resin like plastic, and at room temperature, a urethane system, a styrene system, which shows properties as a rubber elastic body (elastomer), An olefin-based or vinyl chloride-based thermoplastic elastomer (TPE) sheet is preferred. As the synthetic resins, for example, a sheet of thermoplastic resin such as polystyrene, polyethylene, polypropylene, vinyl chloride, or ethylene-vinyl acetate copolymer resin (EVA) is preferable. As in the case of the discharge improving layer 9d shown in FIGS. 3 to 7, the discharge improving layer 13 is particularly preferably formed of the vibration isolating material 9 by closed cell high density foamed rubber such as EPDM. The discharge improving layer 13 is formed on the discharge improving layer 13 side so that the density is higher than the density on the vibration isolator 9 side. When the thickness is less than 0.3 mm, the emission improving layer 13 has a problem that the soundproofing effect and durability are deteriorated. When the thickness exceeds 5 mm, the discharge improving layer 13 does not adhere to the surface of the rail R and follows the surface of the rail R. Is preferably set to 0.3 to 5 mm, and more preferably to 1 to 2 mm. The discharge improving layer 13 is in a state separated from the soundproofing material 8 at the time of carrying in the field, and is in a state of being joined to the soundproofing material 8 after being mounted on the rail R. After mounting on the rail R, the discharge improving layer 13 is joined to the soundproofing material 8 so that the soundproofing material 8 covers the entire surface of the discharge improving layer 13. For example, when the interval between the sleepers 1 is different depending on the track, the discharge improving layer 13 is formed in advance in a width (standard width) substantially the same as the widest sleeper 1 interval. Has been. The discharge improving layer 13 includes an inner surface 13a, an outer surface 13b, a discharge hole 13c shown in FIG.

  The inner surface 13 a shown in FIG. 9 is a portion that is joined to the surface of the rail R, and the outer surface 13 b is a portion that is joined to the inner surface 9 a of the vibration isolator 9. The discharge hole 13c shown in FIG. 8 is a portion for discharging the liquid that enters between the discharge improvement layer 13 and the rail R. The discharge hole 13c is the same as the discharge hole 9c so that liquid such as rainwater entering between the discharge improvement layer 13 and the rail R can be discharged to the discharge hole 9c on the vibration isolation material 9 side. It is a long hole formed at predetermined intervals in the length direction. The discharge hole 13c is connected to the discharge hole 9c on the vibration isolator 9 side, and is formed corresponding to the discharge hole 9c so as to coincide with the discharge hole 9c on the vibration isolator 9 side.

  The adhesive material layer 14 shown in FIG. 8 and FIG. In order to join the inner surface 9a of the vibration isolator 9 and the outer surface 13b of the discharge improving layer 13, the adhesive layer 14 is formed by attaching a double-sided adhesive tape between them. The adhesive layer 14 bonds the vibration isolator 9 and the discharge improving layer 13 with an adhesive that is exposed on both sides of the base material after peeling the release material from both sides of the double-sided adhesive tape. The adhesive layer 14 is formed of the same reactive adhesive as the adhesive layer 12, an emulsion adhesive, a hot melt adhesive, or the like.

Next, a mounting method for a soundproof structure for rails according to a third embodiment of the present invention will be described.
As shown in FIG. 10 (A), before carrying the discharge improving layer 13 into the field, the release material is peeled off from one surface of the double-sided adhesive tape on the discharge improving layer 13 side to remove the adhesive of the adhesive layer 14. A double-sided adhesive tape is affixed to the outer surface 13b of the discharge enhancing layer 13 with this adhesive. The discharge improving layer 13 is carried into the site, and the discharge improving layer 13 is attached to the rail R so that the rail bottom R ₂ and the rail abdomen R ₃ are covered with the discharge improving layer 13. At this time, the discharge improving layer 13 is cut into an arbitrary shape in the field according to the interval of the sleepers 1 and the discharge improving layer 13 is attached to the rail R, and the surface of the rail R and the inner surface 13a of the discharge improving layer 13 are Contact.

  As shown in FIG. 10 (B), before carrying the vibration isolator 9 into the field, the release material is peeled off from one surface of the double-sided adhesive tape on the vibration isolator 9 side, and the adhesive of the adhesive layer 12 is removed. The double-sided adhesive tape is affixed to the outer surface 9b of the vibration isolator 9 with this adhesive. As shown in FIG. 10 (A), after carrying the vibration isolator 9 into the site in a state separated from the discharge improving layer 13, the release material is peeled off from the other surface of the double-sided adhesive tape on the discharge improving layer 13 side. The adhesive of the adhesive layer 14 is exposed. As shown in FIG. 10B, when the vibration isolator 9 is attached to the rail R, the inner surface 9a of the vibration isolator 9 is joined to the outer surface 13b of the discharge improving layer 13 by this adhesive. For this reason, an adhesive layer 14 is formed between the outer surface 13 b of the discharge improving layer 13 and the inner surface 9 a of the vibration isolator 9, and the vibration isolator 9 and the discharge improving layer 13 are joined by the adhesive layer 14. Then, the vibration isolator 9 and the discharge improving layer 13 are mounted on the surface of the rail R. At this time, the vibration isolator 9 is cut into an arbitrary shape in the field according to the interval between the sleepers 1, the vibration isolator 9 is attached to the discharge improving layer 13, and the outer surface 13 b of the discharge improving layer 13 and the vibration isolator. 9 is brought into contact with the inner surface 9a.

As shown in FIG. 10 (B), after the sound insulating material 10 is carried into the site, the release material is peeled off from the other surface of the double-sided adhesive tape on the vibration isolator 9 side to expose the adhesive. ), The inner surface 10a of the sound insulating material 10 is joined to the outer surface 9b of the vibration isolating material 9 by this adhesive. Therefore, an adhesive layer 12 is formed between the outer surface 9b of the vibration isolator 9 and the inner surface 10a of the sound insulating material 10, and the vibration isolator 9 and the sound insulating material 10 are joined by the adhesive layer 12. The anti-vibration material 9, the sound insulation material 10, and the discharge improving layer 13 are mounted on the surface of the rail R. Thereafter, the soundproof material 8 is fixed to the rail R by the fixing member 11 shown in FIG. 8, and the rail bottom R ₂ and the rail abdomen R ₃ are covered with the soundproof material 8. When exchanging or inspecting the rail R, the soundproof material 8 is removed from the rail R by a procedure reverse to the procedure described above.

In addition to the effects of the first embodiment and the second embodiment, the rail soundproof structure according to the third embodiment of the present invention has the following effects.
(1) In this third embodiment, the soundproofing material 8 is provided with a discharge improving layer 13 that improves the discharge of the liquid that enters the gap between the soundproofing material 8 and the rail R. For this reason, when liquid such as rainwater enters the gap between the surface of the rail R and the inner surface 13a of the discharge improving layer 13, the rainwater or the like stays in the gap between them, and the surface of the rail R becomes Corrosion can be prevented.

(2) In the third embodiment, the soundproofing material 8 and the discharge improving layer 13 are separated at the time of carrying in the field, and the soundproofing material 8 and the discharge improving layer 13 are joined after being mounted on the rail R. For this reason, at the time of shipment, the vibration isolator 9 and the discharge improving layer 13 are carried into the site in a state of being separated without being integrated, and the discharge improving layer 13 and the vibration isolating material 9 are arbitrarily set according to the interval of the sleepers 1. It can be processed into a shape and mounted. As a result, it is not necessary to manufacture the soundproofing material 8 having a different length for every interval of the sleepers 1, and the soundproofing material 8 can be manufactured at low cost. Further, after the thick vibration isolator 9 is mounted on the rail R in a state where the relatively thick vibration isolator 9 is separated from the relatively thin discharge improving layer 13, the thin discharge improving layer 13 is mounted on the vibration isolator 9. Can do. As a result, the vibration isolator 9 and the discharge improving layer 13 are separated from each other as compared with the case where the vibration isolator 9 and the discharge improving layer 13 are integrated and the sound insulating material 8 is attached to the rail R in a thick state as a whole. In the case of mounting, the soundproof material 8 can be easily mounted on the rail R.

(3) In the third embodiment, after the mounting to the rail R, the discharge improving layer 9d and the soundproofing material 8 are joined to each other so that the soundproofing material 8 covers the discharge improving layer 9d. For this reason, the soundproof material 8 can suppress the emission improving layer 9d from vibrating with the rail R and generating noise.

(Fourth embodiment)
The soundproofing material 8 shown in FIG.11 and FIG.12 is provided with the vibration isolating material 9, the sound insulating material 10, the adhesive material layer 12, the adhesive material layer 15, etc. FIG. The soundproof material 8 shown in FIG.11 and FIG.12 is equipped with the adhesive material layer 15 on the surface of the discharge | emission improvement layer 9d on the side facing the rail R unlike the soundproof material 8 shown in FIGS.

  The adhesive material layer 15 shown in FIGS. 11 and 12 is a part that bonds the rail R and the discharge improving layer 9d so that the discharge improving layer 9d can be peeled from the rail R. In order to join the surface of the rail R and the inner surface 9a of the discharge improving layer 9d, the adhesive material layer 15 is formed by sticking a double-sided adhesive tape between them. The adhesive material layer 15 joins the vibration isolator 9 and the rail R with an adhesive that is exposed on both surfaces of the base material after the release material is peeled from both surfaces of the double-sided adhesive tape. The adhesive material layer 15 is formed of an adhesive having a relatively low adhesive strength so that the discharge improving layer 9d can be easily peeled from the rail R when the rail R is replaced or inspected. The adhesive material layer 15 is preferably formed of, for example, a peelable natural rubber-based or urethane resin-based adhesive.

Next, a mounting method for a rail soundproof structure according to a fourth embodiment of the present invention will be described.
Before bringing the vibration isolator 9 shown in FIGS. 11 and 12 into the field, the release material is peeled off from one surface of the double-sided pressure-sensitive adhesive tape to expose the adhesive of the adhesive layer 15, and the inside of the discharge improving layer 9d. A double-sided adhesive tape is attached to the surface 9a with this adhesive. After the anti-vibration material 9 is brought into the field, the adhesive is attached to the inner surface 9a of the discharge improving layer 9d and peeled off from the other surface of the double-sided adhesive tape to expose the adhesive, and discharged onto the surface of the rail R. The inner surface 9a of the enhancement layer 9d is joined by this adhesive. For this reason, the adhesive material layer 15 is formed between the surface of the rail R and the inner surface 9a of the discharge improving layer 9d, and the rail R and the discharge improving layer 9d are joined by the adhesive material layer 15 to A discharge enhancing layer 9d is mounted on the surface. Thereafter, the vibration insulating material 9 and the sound insulating material 10 are attached, the sound insulating material 8 is fixed to the rail R by the fixing member 11 shown in FIG. 8, and the rail bottom R ₂ and the rail abdomen R ₃ are covered with the sound insulating material 8. The

In addition to the effects of the first to third embodiments, the rail soundproof structure according to the fourth embodiment of the present invention has the effects described below.
In the fourth embodiment, the soundproofing material 8 includes an adhesive material layer 15 for bonding the rail R and the discharge improving layer 9d so that the discharge improving layer 9d can be peeled from the rail R. For this reason, when the discharge improving layer 9d is mounted on the surface of the rail R, the discharge improving layer 9d can be prevented from being displaced or peeled off from the surface of the rail R by the adhesive material layer 15. In addition, the discharge improving layer 9d can be easily positioned and temporarily fixed on the surface of the rail R during mounting, and the discharge improving layer 9d can be easily detached from the rail R during maintenance.

(Fifth embodiment)
The sound insulating material 8 shown in FIGS. 13 and 14 includes a vibration insulating material 9, a sound insulating material 10, an adhesive layer 12, an adhesive material layer 15, a corrosion preventing layer 16, and the like. The soundproofing material 8 shown in FIGS. 13 and 14 includes a corrosion prevention layer 16 on the surface of the rail R, unlike the soundproofing material 8 shown in FIGS.

  The corrosion prevention layer 16 shown in FIGS. 13 and 14 is a portion that prevents the rail R from being corroded. The corrosion prevention layer 16 is formed on the surface of the rail R in order to prevent corrosion at the interface between the rail R and the emission enhancing layer 9d. The anticorrosion layer 16 is, for example, an anticorrosive film containing a coating type anticorrosive agent such as a phthalic resin type, an epoxy resin type, a polyurea type, a urethane resin type or a vinyl ester type coating type anticorrosive agent, or a fluororesin type. Further, a film such as polyethylene resin or high-density ethylene polypropylene foam rubber is applied to or pasted on the surface of the rail R with an adhesive. The corrosion prevention layer 16, for example, contains a vaporized rust preventive agent such as zinc nitric acid, thereby gradually evaporating the vaporized rust preventive agent, and at the interface between the rail R and the adhesive layer 15. The corrosion of the rail R can be suppressed by forming a rust-proof vaporizing layer.

The soundproof structure for a rail according to the fifth embodiment of the present invention has the following effects in addition to the effects of the first to fourth embodiments.
In the fourth embodiment, the soundproofing material 8 includes a corrosion prevention layer 16 that prevents the corrosion of the rail R between the emission improving layer 9d and the rail R. For this reason, even if liquid such as rainwater enters between the discharge improving layer 9d and the rail R and adheres to the surface of the rail R, the corrosion prevention layer 16 can prevent the surface of the rail R from being corroded.

(Sixth embodiment)
The soundproofing material 8 shown in FIG. 15 is different from the soundproofing material 8 shown in FIGS. 1 to 14 and covers a part of the rail bottom R ₂ and the rail belly R ₃ of the rail R. The anti-vibration material 9 has a block-like appearance, and is disposed at a position corresponding to the left and right upper and lower surfaces of the rail bottom R ₂ of the rail R and a position corresponding to the left and right side surfaces of the rail belly R _3. ing. In the sound insulating material 10, the inner surface 10 a of the sound insulating material 10 is joined to the outer surface 9 b of the block-shaped vibration insulating material 9 by an adhesive layer 12. The sound insulating material 10 prevents the noise radiated to the gap between the inner surface 10a of the sound insulating material 10 and the surface of the rail R from propagating to the outside. The sixth embodiment has the same effects as those of the first to fifth embodiments.

(Seventh embodiment)
Unlike the soundproof material 8 shown in FIGS. 1 to 15, the soundproof material 8 shown in FIG. 16 is formed thicker from the rail head portion R ₁ side of the rail R toward the rail bottom portion R ₂ side. Unlike the vibration isolator 9 shown in FIGS. 1 to 15, the vibration isolator 9 shown in FIG. 16 is not formed with a uniform thickness along the cross-sectional shape of the rail R. The inner surface 9a of the discharge improving layer 9d is joined to the surface of the rail R, and the outer surface 9b of the vibration isolator 9 is formed as an inclined surface that is inclined outward at a substantially constant angle. The sound insulating material 10 shown in FIG. 16 differs from the sound insulating material 10 shown in FIGS. 1 to 15 in that the inner surface 10a and the outer surface 10b of the sound insulating material 10 are substantially constant in the same manner as the outer surface 9b of the vibration isolating material 9. It is formed in the inclined surface which inclines linearly toward the outside downward at an angle. The sound insulating material 10 shown in FIG. 16 is formed by bending the upper end portion of the sound insulating material 10 so as to cover the upper end portion of the vibration insulating material 9, and the inner surface 10 a of the sound insulating material 10 and the vibration insulating material 9. The outer surface 9b is joined by the adhesive layer 12.

The rail soundproof structure according to the seventh embodiment has the following effects in addition to the first to fifth embodiments.
In the seventh embodiment, the soundproof material 8 is formed thicker from the rail head portion R ₁ side of the rail R toward the rail bottom portion R ₂ side. For this reason, it is not necessary to form the cross section of the vibration isolator 9 and the sound insulating material 10 in a shape along the surface shape of the rail R, and the cross section of the vibration isolator 9 and the sound insulating material 10 can be designed to an arbitrary shape. it can. Moreover, since it becomes unnecessary to make the cross section of the vibration isolator 9 and the sound insulating material 10 into the same shape, the manufacturing cost of the sound insulating material 8 can be reduced.

(Eighth embodiment)
Unlike the soundproof material 8 shown in FIGS. 1 to 16, the soundproof material 8 shown in FIG. 17 covers a part of the vibration-proof material 9 with the sound insulating material 10. The anti-vibration material 9 is formed in uniform thickness along the cross-sectional shape of the rail R similarly to the anti-vibration material 9 shown in FIGS. Sound insulation material 10 includes an inner surface 10a of the outer surface 9b Toko sound insulating material 10 of the vibration proof material 9 located in correspondence with the left and right side surfaces and the lower surface of the rail bottom R ₂ of the rail R are joined by adhesive layer 12 Yes. Sound insulation material 10, to form a gap between the inner surface 10a of the outer surface 9b Toko sound insulating material 10 of the vibration proof material 9 located in correspondence with the upper surface of the rail bottom R ₂ of the rail R, the rail abdominal R _A gap is formed between the outer surface 9b of the vibration isolator 9 and the inner surface 10a of the sound insulating material 10 positioned corresponding to the left and right side surfaces of the sound insulating material 3. The sound insulating material 10 shown in FIG. 17 is inclined in such a manner that the inner surface 10a and the outer surface 10b of the sound insulating material 10 are linearly inclined outwardly at a substantially constant angle, similarly to the sound insulating material 10 shown in FIG. Formed on the surface.

The soundproof structure for a rail according to the eighth embodiment of the present invention has the following effects in addition to the effects of the first to fifth embodiments.
In the eighth embodiment, a part of the vibration isolator 9 is covered with the sound insulating material 10. For this reason, it is not necessary to form the cross section of the sound insulating material 10 in a shape along the surface shape of the rail R, and the cross section of the sound insulating material 10 can be designed to an arbitrary shape. Moreover, since it becomes unnecessary to make the cross section of the vibration isolator 9 and the sound insulating material 10 into the same shape, the manufacturing cost of the sound insulating material 8 can be reduced.

(Ninth embodiment)
A soundproof material 8 shown in FIG. 18 includes a vibration-proof material 9, a sound insulation material 10, an adhesive layer 12, a sound absorbing material 17, an adhesive layer 18, and the like. Unlike the soundproof material 8 shown in FIGS. 1 to 17, the soundproof material 8 shown in FIG. 18 includes a sound absorbing material 17 and an adhesive layer 18 on the inner surface 10 a of the sound insulating material 10.

  The sound absorbing material 17 is a member that absorbs noise. The sound absorbing material 17 is disposed in a gap between the outer surface 9 b of the vibration isolator 9 and the inner surface 10 a of the sound insulating material 10, and is attached to the inner surface 10 a of the sound insulating material 10. The sound absorbing material 17 is, for example, a lightweight sound absorbing material made of a high-performance inorganic fiber type, metal fiber type, organic foam type, or any combination thereof excellent in sound absorption. Examples of such inorganic fiber-based sound absorbing materials include glass wool, glass fiber, rock wool, and the like, and examples of metal fiber-based sound absorbing materials include aluminum fibers, stainless steel fibers, and iron-based alloy fibers. Examples of the material include rubber sponge, plastic foam, urethane, ethylene propylene rubber (EPDM), chloroprene, polyurethane foam, foamed polystyrene, or a natural polymer porous body. The sound-absorbing material 17 is particularly preferably a light-weight sound-absorbing material excellent in sound-absorbing performance, which is formed by bonding inorganic fibers such as glass wool, glass fiber or rock wool with a phenol resin or the like. As shown in FIG. 18, the sound absorbing material 17 includes an inner surface 17a facing the outer surface 9b of the vibration isolator 9, an outer surface 17b joined by the inner surface 10a of the sound insulating material 10 and the adhesive layer 18, and the like. Yes.

  The adhesive layer 18 is a part that bonds the sound absorbing material 17 and the sound insulating material 10 together. In order to join the inner surface 17a of the sound absorbing material 17 and the outer surface 10b of the sound insulating material 10, the adhesive layer 18 is formed by attaching a double-sided adhesive tape between them. The adhesive material layer 18 joins the sound absorbing material 17 and the sound insulating material 10 with an adhesive that is exposed on both surfaces of the base material after the release material is peeled from both surfaces of the double-sided adhesive tape. The adhesive layer 18 is formed of a reactive adhesive, an emulsion-type adhesive, a hot-melt adhesive, or the like similar to the adhesive layers 12 and 14 shown in FIGS.

The soundproof structure for a rail according to the ninth embodiment of the present invention has the following effects in addition to the effects of the first to fifth embodiments and the eighth embodiment.
In the ninth embodiment, the sound insulating material 8 includes a sound absorbing material 17 that absorbs noise inside the sound insulating material 10. For this reason, noise radiated to the outside from the vibration isolator 9 can be absorbed by the sound absorber 17.

(10th Embodiment)
A soundproof material 8 shown in FIG. 19 includes a sound absorbing material 17 and an adhesive layer 18 on the outer surface 10b of the sound insulating material 10, unlike the soundproof material 8 shown in FIG. The sound absorbing material 17 shown in FIG. 19 absorbs noise outside the sound insulating material 10, and the inner surface 17 a of the sound absorbing material 17 is joined to the outer surface 10 b of the sound insulating material 10 by the adhesive layer 18.

In addition to the effects of the first to fifth embodiments and the eighth embodiment, the rail soundproof structure according to the tenth embodiment of the present invention has the effects described below.
In the tenth embodiment, the soundproofing material 8 includes a sound absorbing material 17 that absorbs noise outside the sound insulating material 10. For this reason, noise radiated to the outside from the rail R and the sound insulating material 10 can be absorbed by the sound absorbing material 17.

(Other embodiments)
The present invention is not limited to the embodiment described above, and various modifications or changes can be made as described below, and these are also within the scope of the present invention.
(1) In this embodiment, the case where the support is the sleeper 1 has been described as an example, but the present invention can be applied to a support other than the sleeper 1. For example, a support such as a track slab, which is a kind of labor-saving track composed of a rectangular plate-shaped precast concrete plate (slab plate) and integrated with a roadbed and a sleeper, or a rail R is supported. The present invention can also be applied to a support such as a ladder-shaped ladder sleeper that connects longitudinal beams of a stress concrete structure (PRC structure) with a steel pipe joint. Moreover, in this embodiment, the case where substantially the entire surface of the rail bottom portion R ₂ and the rail abdominal portion R ₃ is covered with the soundproof material 8 has been described as an example, but these surfaces are partially covered with the soundproof material 8. A part of the rail head R ₁ can also be covered with the soundproofing material 8 within a range not contacting the tread surface W ₁ and the flange surface W _{2 of} the wheel W. Furthermore, in this embodiment, the case where the rail fastening device 2 is a wire spring type fastening device has been described as an example, but the embodiment is not limited to the wire spring type fastening device. For example, a tie plate type rail fastening device that fastens the rail to the upper surface of the tie plate sandwiched between the rail and the support, or a seat surface type that directly fastens the rail to the upper surface of the support without using the tie plate. The present invention can also be applied to a rail fastening device.

(2) In this 2nd Embodiment and 3rd Embodiment, the case where a double-sided adhesive tape was affixed on the outer surface 9b side of the vibration isolator 9 was described as an example at the time of carrying on site. A double-sided adhesive tape may be attached to the inner surface 10a side of the sound insulating material 10 instead of the outer surface 9b side. In the second to tenth embodiments, the case where the outer surface 9b of the vibration isolator 9 and the inner surface 10a of the sound insulating material 10 are joined by the adhesive layer 12 has been described as an example. It is also possible to omit the adhesive layer 12 by directly joining the outer surface 9b of the vibration member 9 and the inner surface 10a of the sound insulating material 10 in a non-adhered state. Furthermore, in this 3rd Embodiment, although the case where the inner surface 9a of the vibration isolator 9 and the outer surface 13b of the discharge | emission improvement layer 13 were joined by the adhesive material layer 14 as an example was demonstrated, It is also possible to omit the adhesive layer 14 by directly joining the inner surface 9a and the outer surface 10b of the sound insulating material 10 in a non-bonded state.

(3) In the third embodiment, the case where a double-sided adhesive tape is applied to the outer surface 13b side of the discharge improving layer 13 is described as an example at the time of carrying in the field. Alternatively, a double-sided adhesive tape may be attached to the inner surface 9 a side of the vibration isolator 9. In the third embodiment, the case where the emission improving layer 13 has a single-layer structure has been described as an example. However, a stacked structure in which a plurality of emission improving layers 13 are stacked may be used. Further, in the fourth to tenth embodiments, the case where the discharge improving layer 9d is formed on the inner surface 9a of the vibration isolator 9 has been described as an example. However, the inner surface 9a of the vibration isolator 9 and the rail It is also possible to dispose the discharge improving layer 13 between the surface of R and to bond the inner surface 9a of the vibration isolator 9 and the outer surface 13b of the discharge improving layer 13 with an adhesive similar to the adhesive layer 14.

(3) In the fifth embodiment, the case where the adhesive layer 15 is formed on the surface of the corrosion prevention layer 16 has been described as an example. However, the adhesive layer 15 is provided with adhesiveness to the corrosion prevention layer 16 itself. Can be omitted. In the sixth to tenth embodiments, the case where the adhesive material layer 15 between the inner surface 9a of the discharge improving layer 9d and the surface of the rail R is omitted has been described as an example. It can also be joined by the adhesive layer 15. Furthermore, in the ninth and tenth embodiments, the case where the sound absorbing material 17 is disposed inside or outside the sound insulating material 10 has been described as an example, but the sound absorbing material 17 is disposed inside and outside the sound insulating material 10. It can also be arranged.

DESCRIPTION OF SYMBOLS 1 Sleeper 2 Rail fastening device 7 Sound-proof structure 8 Sound-proof material 9 Vibration-proof material 9a Inner surface 9b Outer surface 9c Ejection hole 9d Emission improvement layer 10 Sound insulation material 10a Inner surface 10b Outer surface 10c Ejection hole 11 Fixing member 11a, 11b Holding member 11c Connecting member 12 Adhesive layer 13 Discharge improving layer 13a Inner surface 13b Outer surface 13c Outlet hole 14 Adhesive layer 15 Adhesive layer 16 Corrosion prevention layer 17 Sound absorbing material 17a Inner surface 17b Outer surface 18 Adhesive layer R rail R ₁ rail Head R ₂ rail bottom R ₃ rail abdomen W wheel W ₁ tread W ₂ flange surface

Claims (12)

A soundproof structure for the rail that reduces the noise generated by the vibration of the rail,
A soundproofing material that is mounted on the rail and reduces the noise is provided.
The soundproofing material includes a discharge improving layer that improves the discharge of liquid that enters between the rail and the soundproofing material;
The soundproof structure of the rail characterized by. In the soundproof structure of the rail according to claim 1,
The emission enhancing layer is formed integrally with the soundproofing material on the surface of the soundproofing material facing the rail;
The soundproof structure of the rail characterized by. In the soundproof structure of the rail according to claim 1,
The emission improving layer is a separate member from the soundproof material, and is disposed between the surface of the soundproof material on the side facing the rail and the surface of the rail;
The soundproof structure of the rail characterized by. In the soundproof structure of the rail according to claim 3,
The emission improving layer is in a state separated from the soundproofing material at the time of carrying in the field, and is attached to the soundproofing material after being attached to the rail,
The soundproof structure of the rail characterized by. In the soundproof structure of the rail according to claim 3 or claim 4,
The soundproofing material is joined to the soundproofing material so that the soundproofing material covers the discharge improving layer after being mounted on the rail,
The soundproof structure of the rail characterized by. In the soundproof structure of the rail according to any one of claims 1 to 5,
The discharge improving layer has a smooth surface on the side facing the surface of the rail,
The soundproof structure of the rail characterized by. In the soundproof structure of the rail according to any one of claims 1 to 6,
The soundproofing material includes an adhesive layer that bonds the rail and the discharge improving layer so that the discharge improving layer can be peeled from the rail.
The soundproof structure of the rail characterized by. In the soundproof structure of the rail according to any one of claims 1 to 7,
The soundproofing material comprises a corrosion prevention layer for preventing corrosion of the rail between the emission improving layer and the rail;
The soundproof structure of the rail characterized by. In the soundproof structure of the rail according to any one of claims 1 to 8,
The anti-sound material, it is formed thicker toward the bottom side from the head side of the rail,
The soundproof structure of the rail characterized by. In the soundproof structure of the rail according to any one of claims 1 to 9,
The sound insulating material includes a vibration insulating material that suppresses the vibration and a sound insulating material that covers the vibration insulating material and blocks the noise, and covers the entire surface of the vibration insulating material with the sound insulating material.
The soundproof structure of the rail characterized by. In the soundproof structure of the rail according to any one of claims 1 to 9,
The sound insulating material includes a vibration insulating material that suppresses the vibration and a sound insulating material that covers the vibration insulating material and blocks the noise, and a part of the vibration insulating material is covered with the sound insulating material.
The soundproof structure of the rail characterized by. In the soundproof structure of the rail according to claim 10 or 11,
The soundproofing material includes a sound absorbing material that absorbs the noise inside and / or outside of the sound insulating material;
The soundproof structure of the rail characterized by.

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