JP2879419B2 - Sound insulation device for rail side wall - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound insulation device for a rail side wall which is provided on both side walls of a railroad and which blocks noise when a train or the like is running.
The present invention relates to a sound insulation device for a rail side wall that does not impair the view from a window.

[0002]

2. Description of the Related Art In order to reduce noise when traveling by train, soundproof walls that are lower than the height of the window of the train are provided on both sides of the railroad. Tall soundproof walls were provided on both sides.

[0003]

[0003] Railways provided with soundproof walls on both sides of a track often use a bullet train or an elevated railway to view the scenery from the window while riding. For this reason, a soundproof wall lower than a window of a train is used in places other than a place where the vehicle runs in a residential area or the like. However, noise has the property of wrapping around the wall due to diffraction of sound, so on a soundproof wall lower than the window of the train, the noise easily wraps around the soundproof wall, and originally the soundproof wall There is a problem that the noise cannot be cut off even if the noise is cut off. Also, even if the soundproof wall is higher than the window of the train, the noise may not be cut off as in the case of the lower soundproof wall.

[0004] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a sound insulation device for a rail side wall which has a good sound insulation performance even if it is lower than a vehicle window.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, according to the present invention, a support plate is fixed in the longitudinal direction of an upper end of a side wall, and at least an upper portion of the support plate having a substantially rectangular cross section is provided. One holding plate member is provided, and an outer holding plate is provided at a position outside the holding plate member so as to slightly protrude from the height of the holding plate member. The holding plate member and the outer holding plate are opposed at least to the rail side. The sound absorbing material was fixed to an appropriate thickness on the surface to be cut, so as to absorb noise generated in the rail and to block the sound.

Further, by forming the support plate so as to protrude from the inner side surface of the side wall as appropriate, a plurality of holding plate members can be provided, and the angle for blocking noise can be increased. it can.

Further, by projecting the rail-side upper corner portion of the holding plate member toward the rail side, the sound absorbing area is enlarged, and the sound coming from all angles is absorbed.

Further, by forming the upper end portion of the outer holding plate such that the inner side surface of the upper end portion faces the rail, sound that cannot be completely absorbed by the outer holding plate is provided to the holding plate member provided inside. The sound is reflected and diffracted toward and absorbs sound.

Further, at least one holding plate member slightly higher than the inner holding plate member is provided at an outer position of the holding plate member provided above the support plate, and further at an outer position of the outermost holding plate member. The outer holding plate is provided so as to slightly protrude from the height of the outer holding plate member, so that the sound that jumps over the holding plate member located inside or the sound that comes around is reliably absorbed.
Also, the sound is prevented from spreading by surrounding the sound between the inner and outer holding plate members, and noise is absorbed between the two holding plate members.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 3, reference numeral 1 denotes a side wall provided on both sides of the track, 2 denotes a support plate, 3 denotes an inner holding plate member, 4 denotes an outer holding plate member, 5 denotes an outer holding plate, and 6 denotes a sound absorbing material. It is.

The support plate 2 is formed to be long and substantially U-shaped in cross section. Further, the lower portion 2b of the support plate is bent along the side wall 1 into an L-shaped cross section, and the lower portion 2b of the support plate is bent.
And a fixing piece 7 having an L-shaped cross section for holding the upper end of the side wall 1
Are fixed to the bottom surface of the support plate lower part 2b. And
The upper end of the side wall 1 is held between the fixing piece 7 and the lower part 2b of the support plate,
The support plate 2 is fixed in the longitudinal direction of the upper end of the side wall 1 by clamping the two with the bolts 8, 8,. In the support plate 2, when viewed from the longitudinal direction of the side wall 1, the curved portion 2 c of the support plate protrudes from the outer side surface of the side wall 1, and the end of the support plate upper portion 2 a is more protruded than the inner side surface of the side wall 1. It is formed so as to protrude.

Here, the length of the support plate 2 protruding from the inner side surface of the side wall 1 is determined by taking into account the angle of the rail and the upper end of the side wall 1 and the distance from the rail to the side wall 1 to block the noise at as wide an angle as possible. And it is formed so that an appropriate number of holding plate members can be provided. The support plate 2 is simply formed in a long plate shape or a substantially L-shaped cross section and fixed to the upper end of the side wall 1.
Holding plate members 3, 4 and the like may be provided on the upper surface of the device.

The inner holding plate member 3 is extended through a connecting portion 23 extending from an end of the upper portion 2a of the supporting plate, and is formed to have a substantially U-shaped cross section with the opening end facing downward. Plate member 3
The upper corner portion 3a of the rail side is projected in an arc-shaped cross section toward the rail side.

An outer holding plate member 4 extends from the outer opening end of the holding plate member 3 via a connecting portion 34. The outer holding plate member 4 is slightly higher than the inner holding plate member 3 and is formed to have a substantially U-shaped cross section. Further, similarly to the inner holding plate member 3, the upper corner portion 4a on the rail side faces the rail side. To protrude in an arc shape in cross section.

Further, bolts 8, 8,... And nuts 9, 9,.
Is used to clamp and fix the connecting portion 34 and the upper portion 2a of the support plate, and keep the distance between the upper portion 2a and the lower portion 2b of the support plate constant. Although two holding plate members are provided in the drawing, the number may be increased or decreased according to use as appropriate. When the number of holding plate members is increased, the number of holding plate members is larger than the number of holding plate members located inside. A tall holding plate member may be provided on the outside.

The outer holding plate 5 is formed in a long plate shape slightly protruding from the height of the outer holding plate member 4, and has an upper end 5a formed in an arc-shaped cross section facing the rail. Furthermore, it is connected to the outer opening end of the outer holding plate member 4 via a connecting portion 45 extending at the lower end. And
Using bolts 8, 8,... And nuts 9, 9,.
And the support plate 2 are clamped and fixed.

Then, the upper plate 2a and the lower plate 2b of the support plate are opposed to each other and the rails are opposed to each other.
A sound absorbing material 6 having an appropriate thickness is fixed to each of the upper surface, the rail side surface, and the rail side surface of the outer holding plate upper end 5a.
The sound absorbing material 6 to be used includes tex, glass fiber, felt and the like.

Here, an example of the above-described sound insulation device for rail side walls will be described. Support plate 2 length 4m ~ 5m, height about 100m
m, the width of the upper part 2a is formed in a substantially U-shaped section of about 620 mm, the end of the lower part 2b is bent by about 250 mm, and the upper part 2a is brought into contact with the upper surface and the inner side surface of the side wall 1, and is fixed to the bottom surface of the lower part 2b. The upper end of the side wall 1 is clamped with the piece 7 and clamped and fixed with bolts 8, 8,.

From the end of the upper portion 2a of the support plate, via a connecting portion 23 of about 80 mm formed by being turned upward by 180 degrees,
An inner holding plate member 3 having a height of about 230 mm and a width of about 150 mm is formed, and the rail-side corner 3a of the holding plate member is placed on the rail side by about 30 mm.
The projection is made to have a substantially arc-shaped cross section. And this holding plate member 3
Outside, through a connecting portion 34 of about 120mm, height of about 250m
The outer holding plate member 4 having a width of about 150 mm and a width of about 150 mm is formed. Like the inner holding plate member 3, the corner portion 4a is projected about 30 mm toward the rail. Further, the outer holding plate 5 is formed via a connecting portion 45 of about 120 mm. The outer holding plate 5 is formed such that the height after forming the upper end portion 5a into an arcuate cross section is about 400 mm.

The upper surface 2a and the lower surface 2b of the support plate and the surface facing the rail, the upper surface and the rail side surface of both holding plate members 3 and 4, and the rail side surface of the outer holding plate upper end 5a are respectively provided. A sound absorbing material 6 having a thickness of about 25 mm, for example, Fibrite (trademark) manufactured by Bridgestone Corporation is fixed.

In the sound insulation device for a rail side wall thus formed, the difference in height between the inner holding plate member 3 and the outer holding plate member 4 is about 20 mm, and the outer holding plate member 4 and the outer holding plate 5 The difference in height is about 150 mm (excluding the thickness of the sound absorbing material 6 of about 25 mm). The bolts 8, 8, ... and the nuts 9, 9, ... are used to clamp and fix the connecting portions 34, 45 and the upper portion 2a of the support plate at an interval of 900 mm. Lower 2
The distance between b is kept constant, and the support plate 2 is fixed to the side wall 1.

Hereinafter, the operation of the above-described sound insulation device for a rail side wall will be described. Since the sound absorbing material 6 is fixed to the surface of the apparatus facing the rail side, noise coming toward the apparatus can be absorbed.

Since the support plate 2 is formed to have a substantially U-shaped cross section, the sound is surrounded between the upper portion 2a and the lower portion 2b of the support plate to prevent the sound from spreading, and the sound absorbing material 6 fixed to the support plate 2 is formed.
Can absorb sound. Also, the upper part 2 of the support plate
a, an inner holding plate member 3, an outer holding plate member 4, and an outer holding plate 5 are provided on the upper surface to surround the sound between them to prevent the sound from spreading.
The noise can be absorbed by the sound absorbing material 6 that is fixed to the base member.

The rail side corners 3 of the two holding plate members 3, 4
Since the a and 4a are protruded inward, the area for absorbing noise is increased, and particularly, the corners 4a of the outer holding plate member are:
Since it plays the role of closing the concave portion between the inner and outer holding plate members 3 and 4, it is possible to reliably absorb the sound in the concave portion by preventing the sound that has entered the concave portion from jumping out.

The holding plate member 4 outside the inside holding plate member 3 and the outside holding plate 5 beyond the outside holding plate member 4
Is formed high, it is possible to absorb a sound or the like that jumps over the inner holding plate member 3 and the outer holding plate member 4. Further, since the upper end portion 5a of the outer holding plate is formed in an arc shape, even if the sound absorbing material 6 fixed to the outer holding plate 5 cannot absorb sound, the holding plate member 3 provided inside the outer holding plate 5 The sound can be absorbed by reflecting or diffracting the sound toward 4.

Next, another embodiment of the present invention will be described in detail. In FIG. 4, 11 is a side wall provided on both sides of the track, 12 is a support plate, 13 is an inner holding plate member, 14
Is an outer holding plate member, 15 is an outer holding plate, and 16 is a sound absorbing material.

The support plate 12 is in the shape of a long plate, and the inner portion of the support plate 12 has a width which can protrude by an appropriate length from the inner side surface of the side wall 11. Considering the angle and the distance from the rail to the side wall 11, if the width is formed as wide as possible to block noise, or if the width is formed according to the number of holding plate members provided on the upper surface of the support plate 12, good.

Further, on the outside of the lower surface of the support plate 12, long plate-shaped fixing plates 12a and 12b facing each other with a space equal to the width of the side wall 11 are perpendicular to the lower surface and along the longitudinal direction. It is fixed. And anchor bolts 18,1
8, the locking plate 11 fixed to the side surface of the side wall 11
The support plate 12 is fixed to the upper end of the side wall 11 by fixing the lower end surfaces of the fixing plates 12a and 12b to the upper end surfaces of the a and 11b. Further, on the inside of the lower surface of the support plate 12,
A sound absorbing material 16 having an appropriate thickness is fixed, and a locking piece 16b having an L-shaped cross section for preventing the exfoliation of the sound absorbing material 16 by being in contact with the front end of the sound absorbing material 16 is provided at an appropriate position on the lower surface of the support plate 12. It is stuck.

The inner holding plate member 13 is formed to have a substantially U-shaped cross section with the opening end facing downward (toward the support plate 12).
2 is fixed to the inside of the upper surface. Further, the upper corner portion 13a of the rail side is protruded in a substantially triangular cross section toward the rail side, and a sound absorbing material 16 having an appropriate thickness is fixed to the side and upper surfaces of the rail, and is in contact with both ends of the sound absorbing material 16. A plate-shaped locking piece 16a for preventing the sound absorbing material 16 from peeling off and a locking piece 16b having an L-shaped cross section are fixed to appropriate positions on the upper surface of the support plate 12 and the upper surface of the holding plate member 13.

The outer holding plate member 14 is formed to have a substantially U-shaped cross section with the open end facing downward (the support plate 12 side), and is formed to project slightly higher than the inner holding plate member 13. The support plate 12 is fixed to substantially the center of the upper surface. Then, similarly to the inner holding plate member 13, the upper corner portion 14 on the rail side is provided.
“a” is formed to have a substantially triangular cross section toward the rail side.
Further, a sound absorbing material 16 having an appropriate thickness is fixed to the side and upper surfaces of the rails, and a plate-shaped locking piece 16a that comes into contact with both ends of the sound absorbing material 16 to prevent the sound absorbing material 16 from peeling off has an L-shaped cross section. Are fixed to appropriate positions on the upper surface of the support plate 12 and the upper surface of the holding plate member 14.

Although two holding plate members are provided in the figure, the number of holding plate members may be increased or decreased depending on the use. The width of the plate 12 may be increased so that the outer holding plate member is always higher than the inner holding plate member.

The outer holding plate 15 is connected to the outer holding plate member 14.
Is formed in a long plate shape slightly protruding from the height of the support plate 12, and the upper end portion 15a is bent toward the rail side and fixed to the outer side of the support plate 12. Then, the sound absorbing material 16 having an appropriate thickness is fixed on the side surface of the rail, and the locking pieces 16b, 16b having an L-shaped cross section for preventing the sound absorbing material 16 from peeling off are brought into contact with both ends of the sound absorbing material 16 to the outside. The holding plate 15 is fixed at an appropriate position on the rail side surface. Further, along the back surface of the outer holding plate 15, an L-shaped steel 19 for reinforcement is fixed to the outside of the upper surface of the support plate 12.

Further, a sound absorbing material 16 having an appropriate cross section and having an appropriate thickness is also fixed to the inner side surface of the side wall 11.
6, an engaging piece 16b having an L-shaped cross section for preventing the sound absorbing material 16 from peeling off is fixed to an appropriate position on the rail side surface of the engaging plate 12a, and an anchor bolt 18 is attached at appropriate intervals. It is arranged. The sound absorbing material 16 is appropriately selected from tex, glass fiber, felt and the like.

Here, an example of the above-described sound insulating device for rail side walls will be described. The support plate 12 is formed in a long plate shape having a length of 4 m to 5 m and a width of about 500 mm. The holding plate member 13 is fixed, and the rail-side corner portion 13a is projected in a substantially triangular cross section by about 40 mm, and the sound absorbing material 16 having a thickness of about 40 mm is fixed from the rail side surface to the upper surface of the holding plate member 13. I do.

The space between the inner holding plate member 13 and the inner holding plate member 13 is about 120 mm, the section is substantially U-shaped, the height is about 260 mm, and the width is 100 m.
m, and the rail side corner portion 14a is projected approximately 40 mm in a substantially triangular cross section, and
A sound absorbing material 16 having a thickness of about 40 mm is fixed from the rail side surface to the upper surface of the holding plate member 13.

Further, about 90 mm from the outer holding plate member 14
Opening, a long plate-shaped, holding the outer holding plate 15 having a height of about 360 mm formed by bending the upper end portion 15a to the rail side,
A sound absorbing material 16 having a thickness of 40 mm is fixed to the side of the rail from the position of about 100 mm in height to the upper end of the outer holding plate 15. Further, an L-shaped steel 19 for reinforcing the outer holding plate 15 is fixed to the outer end of the support plate 12 along the back surface of the outer holding plate 15.

The support plate 12 is provided on the inner surface of the side wall 11.
40mm below, about 1760mm in height, about 40mm in thickness and 15 in width
A sound absorbing material 16 having a concave and convex cross section composed of a concave portion of 0 mm and a convex portion having a thickness of about 80 mm and a width of 100 mm is fixed, and further, on the rail-side lower surface of the support plate 12, the thickness from the side wall 11 to the inner end of the support plate 12 is increased. A sound absorbing material 16 having a length of about 40 mm is fixed.

In this embodiment, as the sound absorbing material 16, Fibrite (trademark) manufactured by Bridgestone Corporation is used.

Hereinafter, the operation of the above-described sound insulation device for a rail side wall will be described. On the upper surface of the support plate 12, the inner holding plate member 1
3. An outer holding plate member 14 and an outer holding plate 15 are provided, surround the sound between them to prevent the sound from spreading, and a noise absorbing material 16 fixed to both the holding plate members 13, 14 and the outer holding plate 15 reduces noise. Can absorb sound.

Further, since the rail-side corners 13a, 14a of the two holding plate members 13, 14 are protruded inward, the area for absorbing noise is increased, and particularly, the corners 14a of the outer holding plate members are Since it plays the role of closing the concave portion between the inner and outer holding plate members 13 and 14, it is possible to reliably absorb the sound in the concave portion by preventing the sound that has entered the concave portion from jumping out.

Since the outer holding plate member 14 is formed higher than the inner holding plate member 13 and the outer holding plate 15 is formed higher than the outer holding plate member 14, the inner holding plate member 13 and the outer holding plate 13 are formed. Sound that jumps over the plate member 14 can be absorbed. Then, the upper end portion 15a of the outer holding plate
Is bent to the rail side, so that even if sound cannot be absorbed by the sound absorbing material 16 fixed to the outer holding plate 15, the sound is reflected or diffracted toward the holding plate members 13, 14 provided inside the outer holding plate 15. Let the noise be absorbed.

Further, since the sound absorbing material 16 having a concave-convex section is fixed to the inner surface of the side wall 11, most of the noise can be absorbed without being reflected, and diffraction of the noise incident on the side wall 11 can be prevented.

[0043]

As described above in detail, according to the present invention, it is possible to provide an inexpensive sound insulation device for a rail side wall having good sound insulation performance even when used on a side wall lower than a vehicle window.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing one embodiment of a sound insulation device for rail side walls of the present invention.

FIG. 2 is a partial side view of the sound insulation device for a rail side wall.

FIG. 3 is a partial perspective view showing a use state of the rail side wall sound insulation device.

FIG. 4 is a vertical sectional view showing another embodiment of the sound insulating device for rail side walls of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 11 Side wall 2, 22 Support plate 2a, 12a Upper part 2b, 12b Lower part 3, 13 Holding plate member 3a, 13a Corner 4, 14 Holding plate member 4a, 14a Corner 5, 15 Outer holding plate 5a, 15a Upper end 6,16 sound absorbing material

Claims (5)

(57) [Claims] 1. A support plate is fixed in a longitudinal direction of an upper end of a side wall, and at least one holding plate member having a substantially rectangular cross section is provided on an upper portion of the support plate. At the position, the outer holding plate is provided so as to slightly protrude from the height of the holding plate member, and the holding plate member and the outer holding plate are fixed to the sound absorbing material to an appropriate thickness at least on the surface facing the rail side, A sound insulation device for rail side walls characterized by absorbing noise generated in a rail and absorbing the noise. 2. The sound insulation device for a rail side wall according to claim 1, wherein the support plate is formed so as to protrude from the inner side surface of the side wall as appropriate. 3. The sound insulation device for a rail side wall according to claim 1, wherein an upper corner portion on the rail side of the holding plate member protrudes toward the rail side. 4. The sound insulating device for a rail side wall according to claim 1, wherein an upper end of the outer holding plate is formed such that an inner side surface of the upper end faces the rail. 5. At least one holding plate member slightly higher than the inner holding plate member is provided at an outer position of the holding plate member provided above the support plate, and further, the outer position of the outermost holding plate member is provided. The sound insulation device for rail side walls according to any one of claims 1 to 4, wherein the outer holding plate is provided to slightly protrude from the height of the outer holding plate member.