JP2001342602A - Noise reducing method and device for rail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a noise reducing method and device for a rail capable of restraining and reducing noise generated by contact between wheels and a rail main body by a very simple and easy means. SOLUTION: A vibration proofing member 6 having a required length and thickness is held on the side surface of a rail main body 5 such as a curved part most liable to generate noise by a holding member 7 in the state of always press-contacting the side surface of the rail main body 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a noise reduction method for suppressing or reducing noise emitted from railroad rails as much as possible, and an apparatus therefor.

[0002]

2. Description of the Related Art Vehicles running on a track generate noise due to friction between rails and wheels and impact noise.
In order to prevent or reduce the noise, for example, Japanese Unexamined Patent Publication No. 57-158401 discloses a vibration-proof elastic material having a required thickness over substantially the entire outer periphery except for the upper surface of the contact surface of the rail body and the side surface facing the wheel flange. There has been proposed a noise pollution prevention rail for covering a vehicle.

In Japanese Patent Application Laid-Open No. Hei 2-176001, a protective material made of rubber or synthetic resin is provided between a bottom surface of a bottom plate of a rail and a pillow material and between a top surface of a bottom plate and a holding plate for fixing the rail. A construction method of a rail fixed to a pillow material by a screw via a vibration member has been proposed.
In Japanese Patent No. 2603, the outer surface of a noise absorbing member formed on a band-shaped plate is covered with an elastic body to form a first side restoration, a second side restoration, and a bottom restoration, and these restorations are formed. We propose a rail noise reduction member that is bonded and fixed to the side of the rail column or the bottom of the lower flange, and the traveling impact noise transmitted from the rail head to the column and bottom due to rolling of the wheel is absorbed by each reconstructed body. ing.

[0004]

The noise reduction means proposed in each of the above publications is common in that a vibration isolating member is used for the rail, and a corresponding noise reduction effect is expected. However, since the mounting of the vibration isolating member on the rail is extremely complicated, a long period of time is required for the construction, resulting in an increase in cost.

SUMMARY OF THE INVENTION In view of such circumstances, an object of the present invention is to provide a railroad noise reduction method and a railroad rail noise reduction method capable of reducing generated noise by extremely simple means.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, a vibration damping member having a required thickness and length is pressed against a side surface of a rail main body. This is a noise reduction method for railway rails, characterized in that it is held.

According to a second aspect of the present invention, there is provided a vibration damping member having a required thickness and length to be brought into contact with a side surface of a rail main body, and the vibration damping member is maintained in a state of being pressed against the rail main body. A noise reduction device for a railway rail, comprising a holding member for holding.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the noise reduction device for railway rails of the present invention will be described below in detail with reference to the accompanying drawings. The reduction method will be described.

A noise reduction device for a railway rail according to the present invention (hereinafter referred to as a noise reduction device) includes a vibration damping member having a required thickness and length to be brought into contact with a side surface of a rail main body, and a rail damping member having the required thickness and length. A holding member for holding the main body while maintaining the pressure contact state, and is provided at a required portion such as a joint between rail main bodies where noise is likely to occur, a switching point portion, and a curved section. The most characteristic feature is that it can be mounted in a proper manner.

A noise reduction device 1 shown in FIG. 1 has a bottom 2 in contact with a sleeper (not shown), a column 3 vertically erected at the center of the bottom 2, and an upper end of the column 3. A rail body 5 having an I-shaped cross section and a head 4 formed and in contact with a wheel.
And a holding member 7 for pressing and holding the damping member 6 against the side surface of the pillar 3 of the rail body 5. It is.

One of the damping members 6 constituting the noise reduction device 1 is made of a material having an effect of absorbing or reducing noise generated when the rail main body 5 contacts the vehicle wheels (not shown). There is no special restriction on the material,
For example, a known natural or synthetic polymer material excellent in heat resistance, weather resistance, and cold resistance, more specifically, a material made of butyl rubber having a large internal loss is preferable.

The other holding member 7 is a holding body 8 obtained by molding a single band-shaped plate material having a required thickness and width.
And a mounting main body 10 for mounting the holding main body 8 to the rail main body 5.

The holding body 8 is provided on the bottom 2 of the rail body 5.
One side edge of a base material 8a made of a plate material contacting with the upper surface is bent upward into a U-shaped side surface, and the flange 2a of the bottom portion 2 is bent.
And an engagement portion 8b formed indirectly in contact with a rubber packing 13 so that the upper edge of the engagement portion 8b is spaced from the side surface of the column 3 of the rail body 5 by a required distance. Then, the pressing portion 8c is integrally formed by being erected so as to face each other, and the other side edge portion is made to protrude horizontally from the other side edge portion of the rail main body 5, and the rail main body 5 of the protruding portion 8d is formed. Bottom 2 of
A groove 9 having a required length and width along the width direction is formed in a portion in contact with the end face of the flange 2b.

The mounting main body 10 is provided on the outer surface of the substrate 10b inserted and held in the groove 9 formed in the holding main body 8, in a state in which the projecting piece 8d faces in parallel with the projection 8d projecting in the horizontal direction. 10c, a wedge-shaped spacer 14 disposed on the upper surface of the bottom 2 is always provided on the upper edge thereof.
Pressing pieces 10a are formed integrally with each other, and the mounting body 10 includes the projecting pieces 10c,
The projecting portion 8d is integrally attached to the holding body 8 by a connecting member 11 composed of a bolt 11a and a nut 11b.

Note that the pressing piece 10a is
Although the side surface is formed in an arc shape because it is configured to be in close contact with the upper surface of the bottom portion 2 of the rail main body 5 via
Naturally, various modifications can be made depending on the shape of the spacer.

As shown in FIG. 1, the noise reduction device 1 having such a structure includes a vibration damping member on the inner side of the pressing portion 8c of the holding body 8, that is, on the side opposed to the side surface of the pillar 3 of the rail body 5. 6
Is fixed by an adhesive or the like, the upper surface of the base material 8a contacts the lower surface of the bottom 2 of the rail body 5, and the connecting portion 8b
Is inserted from the lateral direction of the rail body 5 so as to engage with one flange 2 a of the bottom portion 2. In this embodiment, means for fixing the damping member 6 to the pressing portion 8c is employed, but fixing to the pressing portion 8c is not always necessary.

At this time, as shown in FIG.
Between the upper surface of one flange 2a forming the bottom 2 and the inner surface of the engaging portion 8b facing the upper surface of the flange 2a.
By interposing a plate-shaped packing or a spacer 13 made of an elastic material having a required thickness and width, the adhesion can be improved and the generation of noise can be reduced.

Next, after a wedge-shaped spacer 14 made of an elastic material is disposed on the upper surface of the flange 2b of the bottom portion 2 of the rail body 5 on the opposite side where the vibration damping member 6 is located, the spacer 14 is pressed by the pressing piece 10a. While holding, the substrate 10b of the mounting main body 10 is engaged and held in the groove 9 formed in the holding main body 8, and the protrusion 8d of the holding main body 8 and the mounting main body 10 are held.
The holding main body 8 and the mounting main body 10 are integrally connected by a connecting member 11 composed of a bolt 11a and a nut 11b with a rubber packing or spacer 12 interposed between the overhanging piece 10c and the holding piece. The member 7 is integrally mounted on the rail main body 5.

At this time, a spacer 14 formed in a wedge shape,
By cooperating with the degree of tightening of the connecting member 11,
The degree of adhesion of the damping member 6 to the column 3 and the degree of adhesion of the holding member 7 to the rail body 5 can be freely adjusted. The shape of the substrate 10b constituting the mounting main body 10 is shown in FIG. The degree of engagement between the rail body 5 and the holding member 7 can also be adjusted by making the rail body 5 tapered so that the thickness decreases from the upper end to the lower end as shown in FIG.

The noise reduction device 20 shown in FIG. 2 has a vibration damping member 21 for pressing against the side surface of the column 3 of the rail body 5 and a pressure damping member 21 for pressing and holding the vibration damping member 21 on the column 3 of the rail body 5. And a holding member 22.

The holding member 22 is provided on one side edge of a plate-like base material 24 having a required thickness and width.
An engaging portion 23 that engages with one flange 2b of the bottom portion 2 is integrally formed, a support member 26 having an L-shaped cross section is formed on the other side edge portion, and a vertical portion is formed with the column portion 3 as required. And a part thereof faces the other flange 2 of the rail body 5.
In order to attach the horizontal portion to the vertical portion of the support 26 and constantly press the vibration damping member 21 against the side of the column portion 3 of the rail body 5, the horizontal portion is attached so as to be in contact with the horizontal portion a. The pressing main body 28 is provided so as to be able to advance and retreat.

The pressing body 28 is formed such that both ends of a plate having a required width and thickness are bent inward, and the vibration damping member 21 is mounted therein. The shaft member 27a formed integrally with the support member 26 is integrally protruded, and the shaft member 27a is passed through a through hole formed in a vertical portion of the support 26, and the nut 2 is attached to the penetrated shaft member 27a.
7b is engaged and the nut 27b is rotated so that the distance between the vertical portion of the support 26 and the column 3 of the rail body 5 can be freely adjusted. The configuration is not particularly limited as long as it can be moved back and forth with respect to the column 3 of the fifth, in other words, as long as it can be approached or separated.

In the noise reduction device 20 having such a configuration, the base member 24 having the engagement piece 23 formed on one side edge is disposed below the bottom portion 2 of the rail main body 5, and as shown in FIG. After the joint 23 is engaged with the one flange 2b and brought into contact with the bottom 2, a support member 26 having an L-shaped cross section is connected to a portion protruding outside the other flange 2a using a coupling member 25. It is to be erected.

When the support 26 is erected on the base material 24, the vibration damping member 21 is previously mounted on the pressing body 28 by appropriate means. The attachment to 28 need not necessarily be in advance.

A holding piece 26a having an inverted L-shaped side surface is integrally formed with the vertical portion of the L-shaped support member 26 at a position facing the side surface of the column portion 3, and the inside of the holding piece 26a is formed. The height adjustment rubber 26b is interposed between the support 2
The height of the base 2 can be freely adjusted, and a reinforcing plate 29 having a triangular side surface is provided on the rear surface of the base 2 so that the base material 2 can be adjusted.
4, the support 26 can be securely held.

The noise reduction device 30 shown in FIG. 3 is a plate-like base material having a required thickness and width which comes into contact with the bottom portion 2 of the rail body 5 and a vibration damping member 36 which is pressed against the column portion 3 of the rail body 5. 31 along one side edge of the bottom 2 of the rail body 5.
A holding main body 33 in which a side engaging with one of the flanges 2a is integrally formed by bending a U-shaped engaging portion 32, and the other side edge of the base material 31 protruding from the bottom 2 A support body 35 which is integrally erected and has a facing portion 34 facing one side surface of the pillar portion 3 of the rail body 5.
And a pressing body 37 comprising a nut 38 and a bolt 39 provided at the facing portion 34 of the support 35 so as to be able to advance and retreat.
It is composed of

The pressing body 37 has a through hole 34a formed at a required portion of the facing portion 34, a nut 38 is integrally attached along an outer peripheral edge of the through hole 34a, and a bolt 39 is advanced to and retracted from the nut 38. One supporting body 35 is provided freely.
At least one, and preferably two or three.

When laying the rail body 5, the noise reduction device 30 having such a configuration can be used to install the bottom 2 from the front side of the rail body 5.
Along the flange 2a, the holding main body 33 was attached to the bottom portion 2 of the rail body 5 while being engaged with the engaging portion 32 of the base material 33, and then the bolt 39 of the pressing body 37 was loosened. In the state (retracted state), the vibration damping member 36 abuts along the column 3, and thereafter, the bolt 39 is rotated in the forward direction to press the vibration damping member 36 toward the column 3. The vibration damping member 36 is always held in close contact with the pillar 3. When the vibration damping member 36 is pressed and held on the pillar 3, the vibration damping member 36 is formed of a steel material such as stainless steel on the back side. The restricted plate 36a may be provided integrally.

The noise reduction device 40 shown in FIGS.
50 are all made of a material having elasticity such as spring steel, and the noise reduction device 40 of FIG.
On one side edge of the base material 41 having the required thickness and width,
An engaging portion 42 that engages with one flange 2a of the bottom portion 2 that constitutes the rail body 5 is formed by bending, and the other side edge portion is also bent so as to be always in pressure contact with the other flange 2b. Is formed, and the press contact portion 4 is formed.
A holding body 45 having a pressing plate 44 facing the pillar 3 of the rail main body 5 by extending the tip of the holding member 3 upward, and is constantly pressed and held on a side surface of the pillar 3 by the pressing plate 44 of the holding body 45. And a vibration damping member 46.

The noise reduction device 50 shown in FIG. 5 has a rail body 5 on one side edge of a base material 51 having a required thickness and width.
An engaging portion 52 that engages with one flange 2a of the bottom portion 2 is formed by bending, and an engaging portion 53 that engages with the other flange 2b is also formed on the other side edge by bending. Then, a holding body 55 in which a tip of the engaging portion 53 is extended upward to form a pressing plate 54 facing the column 3 of the rail body 5, And a vibration damping member 56 which is pressed and held on the side surface of.

The noise reduction device 60 shown in FIG. 6 uses a fixing device 61 for fixing the rail main body 5 to the sleeper 65. The fixing device 61 basically includes a bottom portion 2 of the rail main body 5. The right and left flanges 2a, 2b are always
A pair of left and right spring bodies 62 (only one side is shown in FIG. 6 for convenience) pressed toward the fifth side, and this spring body 62 is
5 and a fixing tool including a bolt 63 and a nut 64 for fixing the fixing member 5.

Using this fixing device 61, the vibration damping member 6
In order to hold the pressure-contact state of 6 on the side surface of the pillar portion 3 of the rail main body 5, the bolt 63 above the spring body 62 constituting one of the fixing devices 61 is entirely elastic such as spring steel. This is performed by mounting a pressing body 67 made of a material having the following structure, interposing a vibration damping member 66 between the distal end portion 67a of the pressing body 67 and the column portion 3, and tightening a nut 64. 66 and the tip 6 of the pressing body 67
7a, a restraining plate 68 is interposed.

The base material 41 or 51 constituting each of the noise reduction devices 40 or 50 shown in FIGS. 4 and 5 does not necessarily need to be in contact with the back surface of the bottom 2 of the rail body 5; 45 or 55 is the bottom 2 of the rail body 5
, And can be mounted on the rail main body 5.
Or 56 is constantly pressed and held on the side surface of the pillar portion 3 of the rail body 5, and the restraining plates 46a or 5
6a may be used.

The noise reduction devices 40 and 50 having such a configuration
It can be easily mounted on the rail body 5 by utilizing the elasticity of the holding body 46 or 56, and the noise reduction device 60
Uses a fixing device 61 for fixing an existing rail. In any case, the mounting position of the damping member on the rail main body 5 is basically such that noise is most generated. Easy joints between rail bodies, switching points,
Furthermore, it is attached to the side of the pillar such as a curved section,
The thickness and width of the damping member to be used can be appropriately determined depending on the attachment site.

[0035]

According to the method for reducing noise of a railroad rail according to the present invention, a required thickness is applied to a side surface of the rail main body such as a joint of the rail main body, a switching point portion, or a curved section, which is a part where noise is most likely to occur. Since the vibration damping member having the length and the length is pressed and held, the mounting of the vibration damping member on the rail body is extremely simple and easy, and the cost is far reduced as compared with the method of mounting the vibration damping member on the entire rail body. The noise generated can be effectively suppressed or reduced.

Further, the noise reduction prevention device of the present invention includes a vibration damping member that abuts a portion where noise is most likely to be generated, and a holding body that constantly presses and holds the vibration damping member on the side surface of the pillar portion of the rail body. The structure is extremely simple, so it is very easy to mount it on the rail body, so it is possible to achieve a significant reduction in the construction period and manpower for installation work, and to replace the existing rail body. Can be freely mounted, and noise generated from the railroad rail can be effectively suppressed or reduced.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an example of a railway rail noise reduction device of the present invention.

FIG. 2 is a partially cutaway front view showing another example of the noise reduction device of the present invention.

FIG. 3 is a partially cutaway front view showing still another example of the noise reduction device of the present invention.

FIG. 4 is a partially cutaway perspective view showing still another example of the noise reduction device of the present invention.

FIG. 5 is a partially cutaway perspective view showing still another example of the noise reduction device of the present invention.

FIG. 6 is a partially cutaway front view showing still another example of the noise reduction device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Railway rail noise reduction device 2 Bottom part 2a, 2b Flange part 3 Column part 5 Rail body 6 Damping member 7 Holding member 8 Holding body 8a Base material 8b Engaging part 8c Mounting part 8d Projecting part 9 Groove 10 Suppression member 10a Pressing Piece 11 connecting member 14 spacer

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Katsuyoshi Kimura 1-1-1, Kamadaicho, Hodogaya-ku, Yokohama Sagami Railway Co., Ltd. (72) Inventor Kazuka Iida 3-1-1 Ogawahigashicho, Kodaira, Tokyo (72) Inventor Kiyotaka Kaneko 1-32-12 Higashi, Shibuya-ku, Tokyo In-house Bridgestone IPT Corporation (72) Inventor Sadao Nomoto 1-32-12 Higashi, Shibuya-ku, Tokyo Bridgestone IPT F-term (reference) 2D056 CA01 CA05 3J048 AA01 AB02 AC01 BA11 BB03 DA04 EA38

Claims (9)

[Claims] 1. A vibration damping member having a required thickness and length is held on a side surface of a rail main body in a press-contact state to suppress or reduce noise generated by engagement between a rail main body and a wheel. Noise reduction method for railway rails. 2. A vibration damping member having a required thickness and length to be brought into contact with a side surface of a rail main body, and a holding member holding the vibration damping member while keeping the rail main body pressed against the rail main body. A noise reduction device for railroad rails. 3. The holding member is connected to one side edge of a plate-shaped base material that comes into contact with a bottom portion of the rail main body via an engagement portion that directly or indirectly comes into contact with one flange of the bottom portion. A holding body integrally provided with a pressing portion for pressing the vibration isolating member against the pillar portion of the rail main body, and a holding member attached to the other side edge of the base material by a coupling member, and the other of the bottom of the rail main body. The railroad rail noise reduction device according to claim 2, wherein the railroad rail noise reduction device is configured by an attachment body for fixing the holding body to the rail body by abutting the flange with a spacer. 4. The holding member is provided with an engaging piece that engages with one flange at the bottom of the rail main body at one side edge of a plate-shaped base material that abuts on the bottom constituting the rail main body. Formed on the other side edge portion, a support having an L-shaped cross section, a vertical portion faces the column portion at a required interval, and a part of the support portion faces the other flange of the rail body. The mounting member is provided so as to be in contact with each other, and a pressing main body for constantly pressing the vibration damping member against the side surface of the pillar portion of the rail body is provided on a vertical portion of the support so as to be able to advance and retreat. A noise reduction device for a railway rail as described. 5. The holding member according to claim 1, wherein said holding member is provided with an engaging portion which is directly or indirectly in contact with a flange of said bottom at one side edge of a plate-shaped base material which comes into contact with a bottom of said rail main body. A main body, and a pressing body which is provided on an upper part of a support body erected on the other side edge of the holding main body so as to be able to advance and retreat, and constantly presses a vibration damping member against a pillar portion of the rail main body. The railroad rail noise reduction device according to claim 2, characterized in that: 6. The holding member is entirely formed of a material having elasticity, and is directly or indirectly connected to one side edge of a plate-shaped base material located at the bottom of the rail main body with a flange at one bottom. Along with forming an engaging portion that contacts the other side edge, a pressing portion that is constantly pressed against the other bottom flange is formed, and a vibration damping member is directly connected to the pressing portion to the pillar portion of the rail body. The noise reduction device for a railroad rail according to claim 2, wherein a pressing plate for pressing constantly and indirectly is integrally formed. 7. The holding member is entirely formed of a material having elasticity, and is provided directly on at least one side edge of a plate-shaped base material contacting both ends of the bottom of the rail main body with a flange on one bottom. Alternatively, an engaging portion which is indirectly contacted is formed, and a pressure plate which constantly or directly presses the vibration damping member on the pillar portion of the rail main body is integrally formed on the other side edge portion. Item 3. The railway rail noise reduction device according to Item 2. 8. The holding member according to claim 2, wherein the holding member is a pressing plate made of an elastic material and attached to a bolt of a fixing device for fixing the rail body to the sleeper.
A noise reduction device for a railway rail according to claim 1. 9. The railroad rail noise reduction device according to claim 2, wherein said damping member is made of rubber or synthetic resin material.