JP3819331B2 - Sound absorption device for slab track - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sound absorbing device provided on a slab track such as a railroad track.
[Prior art]
2. Description of the Related Art Conventionally, as a sound absorbing structure or sound absorbing device for a railroad track or the like, one described in Japanese Patent Laid-Open No. 5-195501 is generally known.
[0002]
That is, the sound-absorbing material and the support beam that supports the FRP grating that protects the sound-absorbing material are:
The thing of the structure fixed between the rail side surfaces on either side via the insulating material is disclosed.
[0003]
However, in such a conventional structure, for example, at the time of rail replacement, the installed sound absorbing material must be once removed, and the protection of the installed sound absorbing material surface is not considered much, Therefore, there has been a problem that the installed sound absorbing material is damaged depending on the use for many years, and the replacement time is advanced, resulting in high cost.
[Problems to be solved by the invention]
The present invention has been developed in view of the above-described conventional problems, and can efficiently absorb noise generated by vibrations on a slab track such as a railroad track and mechanical noises of a traveling vehicle, and the cost can be reduced. An object of the present invention is to provide a sound absorbing device for a slab track that can replace the rail without removing the sound absorbing device already installed on the track when exchanging a pair of installed rails. It is what.
[Means for Solving the Problems]
The sound absorbing device for a slab track according to the present invention is:
A sound absorbing device for a slab track, in which a pair of rails are laid on sleepers installed at intervals in the longitudinal direction of the track,
A plurality of support beams are arranged in the gap between the sleepers and in the same direction as the sleeper installation direction, and are approximately the same length as the width between the pair of rails , and are in a non-contact state with the rails. Surface protection that protects the sound-absorbing member by attaching a sound-absorbing member with a space between the support beams attached between the rails and adjacent to each other in the longitudinal direction of the track. Install the member with a space on the top side of the sound absorbing member,
In the longitudinal direction of the track on both outer sides of the pair of rails, the support beams are arranged in the gap between the sleepers and the sleepers in the same direction as the sleeper installation direction, and the support beams installed adjacent to the track longitudinal direction are supported. between the beam mounting the sound absorbing member with a space between the sleepers upper surface, and wherein a space the surface protective member for protecting the sound-absorbing member to the sound absorbing material upper surface to cover an end portion side of the sleepers Attached,
The support beam has a substantially convex cross section, and a mounting portion is provided on each of the intermediate step portions on both sides in the width direction of the support beam, and the end of the sound absorbing member is fixed and installed, and the support beam The top surface of the surface protection member is fixedly installed on the top surface via a mounting fixture.
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the drawings.
[0004]
A plurality of sleepers 2 are laid in the longitudinal direction of the slab track 1 at a predetermined interval.
[0005]
A pair of rails 3, 3 are laid on the plurality of sleepers 2 in the longitudinal direction of the slab track 1.
[0006]
Here, reference numeral 4 indicates a support beam, and the support beam 4 is disposed on the slab track 1 and in a gap 5 between the sleepers 2 and 2 that are laid.
[0007]
The support beams 4 may be disposed in all the gaps 5 between the sleepers 2 and the sleepers 2, or the support beams 4 may be disposed with the gaps 5 being skipped by one or two places.
[0008]
When the support beam 4 is disposed on the slab track 1, as can be understood from the drawing, the vibration resistance formed of hard rubber or the like between the upper surface of the slab track 1 and the lower surface of the support beam 4, It is assumed that a packing 6 having vibration proofing properties is interposed.
[0009]
Here, the configuration of the support beam 4 will be described. The support beam 4 is preferably formed of a non-conductive member, and has a substantially convex cross section as understood from FIG. 2 is formed as a rectangular body having a substantially convex cross section extending in the same direction as the longitudinal direction.
[0010]
Both ends of the support beam 4 in the longitudinal direction are provided with substantially trapezoidal projecting walls 7 and 7, and between the projecting walls 7 and 7, an end of a sound absorbing member 12 to be described later is placed. The sound absorbing member 12 is constructed between the adjacent support beams 4 and 4.
Further, the upper surface of the support beam 4 is a top surface 8 extending in the horizontal direction, and mounting portions 9 and 9 are formed on the step portion located substantially in the middle between both side surfaces in the width direction.
[0011]
A hole-in anchor 10 is embedded in the slab track 1, and the support beam 4 is screwed into a female screw portion of the hole-in anchor 10 by screwing a mounting bolt 11 that vertically penetrates the support beam 4. It is fixed to the slab track 1.
[0012]
Between the mounting portions 9 and 9 of the support beams 4 and 4 adjacent to each other between the pair of rails 3 and 3, the plate-like sound absorbing member 12 is laid as described above, and a predetermined space 17 is provided from the upper surface of the sleeper 2. Attached. The predetermined space 17 functions as a vibration isolation space.
[0013]
As can be understood from the drawing, mounting holes 13 are formed on both ends of the mounting portion 9 in the longitudinal direction, and a fixing screw or the like is screwed into the mounting hole 13 to attach the sound absorbing member 12. It will be attached.
[0014]
Here, the configuration of the sound absorbing member 12 having a plate shape is not limited at all, but as an example, a semi-fluid sound absorbing material is placed in a form having a flat case shape with a relatively thin thickness and an upper surface opened. It is conceivable that the mold is filled by filling and solidifying it.
[0015]
The material of the mold is not limited at all, but an example is one formed of a resin product such as vinyl chloride. Further, if a non-conductive material such as a resin product is used, even if the sound absorbing member 12 contacts the left and right rails 3 and 3, a signal current or the like does not flow erroneously. Further, there is an advantage that the plate-like sound absorbing member 12 having a certain strength can be mass-produced and manufactured at a low cost.
[0016]
In addition, examples of the sound absorbing material include a sound absorbing material that forms a semi-fluid formed by including cement, such as 50 to 300 parts by weight of cement, 100 to 500 parts by weight of lightweight aggregate,
The thing containing 50-130 weight part of water is mentioned.
[0017]
The above sound-absorbing material containing cement, lightweight aggregate, water and various admixtures, wherein the volume ratio of bubbles in the sound-absorbing material in a semi-fluid state is 20 to 80%, and the porosity in the sound-absorbing material after solidification is 10 What becomes -50% is still more preferable.
Lightweight aggregates include perlite, carbon hollow sphere, plastic balloon, glass balloon,
Conventionally known natural and artificial lightweight aggregates such as silica balloon and shirasu balloon can be used regardless of organic or inorganic. Among these lightweight aggregates, lightweight bones satisfying conditions such as a specific gravity of less than 1.0, a surface layer that does not allow water to permeate, and strength required for construction. A material is preferred. A compounding quantity makes 100-500 weight part essential, and there exists a possibility that a desired sound absorption effect may not be acquired as it is less than 100 weight part, and when it exceeds 500 weight part, there exists a possibility that a solidified state may deteriorate.
[0018]
Moreover, regarding an artificial lightweight aggregate, a high-strength inorganic foamed particle can be exemplified as a lightweight aggregate having the above-described characteristics. With respect to the inorganic foam particles, a part of the inventor has been described in detail in a specification already filed by Japanese Patent Application (JP-A-8-333819). It is a lightweight, high-strength lightweight aggregate whose surface is covered with a porcelain skin layer, and exhibits high sound absorption performance.
Further, the type of cement is not particularly limited, and conventionally known ordinary Portland cement, early-strength Portland cement, moderately hot Portland cement, sulfate-resistant Portland cement, white Portland cement, mixed Portland cement and the like can be used. The amount of cement is 50 to 300 parts by weight, and if it is less than 50 parts by weight, the sound absorbing material may not be provided with sufficient strength. There is a risk of doing.
Water is essential for setting and hardening the cement by hydration reaction. The compounding quantity makes 50-130 weight part essential. If it is less than 50 parts by weight, the cement may be insufficiently cured. If it exceeds 130 parts by weight, curing takes time.
It is also possible to use an organic admixture as a part of the adsorbent for the sound absorbing material. Examples of the organic admixture include resin emulsions such as all acrylic resins, acrylic-styrene copolymer resins, styrene-butadiene copolymer resins. Particularly preferably, an acrylic resin emulsion having a polar group such as a carboxyl group at the terminal is recommended.
Other admixtures that may be blended as necessary include plaster suitable for controlling condensation, various fillers for reinforcing sound-absorbing materials, such as chemical fibers and glass such as polyester, polyethylene, vinylon, rayon, and nylon. Fiber, inorganic fiber such as rock wool, various cinnabar sand,
Examples thereof include pigments such as barium sulfate, calcium carbonate and clay, and scaly fillers such as mica.
In addition, various additives such as a water reducing agent and a thickening agent for securing and improving the workability of the sound absorbing material and the performance after curing can be blended as necessary. These compounding amounts are determined as appropriate.
Furthermore, a foaming agent may be added for the purpose of improving sound absorption performance. In general, the foaming agent can be appropriately selected from conventionally known anionic surfactants, animal proteins and the like. N-acyl amino acids and salts thereof, carboxylates such as alkyl ether carboxylic acids and acylated peptides, sulfonates such as alkylbenzene sulfonates and alkylnaphthalene sulfonates,
Examples thereof include sulfate ester salts, phosphate ester salts, and glue. The foaming agent can be added by (1) diluting the foaming agent to an appropriate concentration and adding it directly when mixing the sound-absorbing material, (2) passing the foaming agent through a foaming device to generate bubbles, An example is a method of mixing bubbles into a sound-absorbing material after kneading. In any method, the volume ratio of bubbles in the sound-absorbing material before solidification is adjusted to 20 to 80%. If the bubbles are less than 20%, the sound absorbing effect cannot be improved, and if it exceeds 80%, the strength of the sound absorbing material is lowered and the durability may be lowered.
[0019]
Further, although the bubbles disappear with the hardening of the cement, voids remain in the sound absorbing material after the disappearance.
As described above, the porosity in the sound absorbing material is preferably 10 to 50%. If the content is less than 10%, the sound absorption effect cannot be improved, and if it exceeds 50%, the strength of the sound-absorbing material is lowered and the durability may be lowered.
Next, the support beams 4 are arranged on both outer sides in the longitudinal direction of the pair of rails 3 and 3 as in the case between the pair of rails 3 and 3.
[0020]
That is, the hole-in anchor 10 is embedded in the slab track 1 also on the outer sides in the longitudinal direction of the pair of rails 3, 3, and the mounting bolt 11 is inserted through the support beam 4 into the female thread portion of the hole-in anchor 10. The support beam 4 is fixed to the slab track 1 by screwing together.
[0021]
The sound absorbing member 12 having a plate shape between the mounting portions 9 and 9 of the adjacent support beams 4 and 4 toward the longitudinal direction of the slab track 1 is provided on both outer sides in the longitudinal direction of the pair of rails 3 and 3. In the same manner as in the case between the pair of rails 3, 3, it is attached with a predetermined space 17 from the upper surface of the sleeper 2. The predetermined space 17 also functions as a vibration isolation space.
[0022]
As can be understood from the drawing, mounting holes 13 and 13 are formed on both ends in the longitudinal direction of the mounting portion 9, and a sound-absorbing member 12 is screwed into the mounting hole 13 with a fixing screw or the like. It has a structure to attach.
[0023]
Furthermore, when attaching the sound absorbing member 12, the sound absorbing member 12 is installed so as to sufficiently cover the tip of the sleeper 3 installed on the slab track 1.
[0024]
Thereby, the rolling sound etc. which arise by contact of the rail 3 and a wheel at the time of train traveling can fully be absorbed.
[0025]
Next, a surface protection member 14 is attached to the upper surface side of the installed sound absorbing member 12 by providing a space 17 between the upper surface of the sound absorbing member 12. This space 17 can prevent the surface protective material 14 and the upper surface of the sound absorbing member 12 from contacting each other.
[0026]
Here, the material of the surface protective material 14 is not limited in any way, but it is preferably a non-conductive member like the sound absorbing member 12, and an example is a plate made of FRP having high strength.
[0027]
As can be understood from FIG. 6, the end of the surface protection member 14 to be mounted next to each other is placed on the top surface 8 of the support beam 4, and the mounting fixture 15 having a concave shape is attached to the surface. The end pieces 16 and 16 of the protection member 14 are clamped and fixed. The mounting fixture 15 is fixed to the upper surface of the support beam 4 by the mounting bolt 11.
[0028]
As can be understood from FIG. 1, the two ends of the support beam 4 are provided between the pair of rails 3 and 3, and the end of the support beam 4 on the rail 3 side and the support beam 4 are provided outside the rail 3. The end pieces 16 and 16 of the surface protection member 14 are sandwiched between the mounting fixtures 15 at substantially intermediate positions in the longitudinal direction,
It is fixed.
[0029]
As described above, according to the present embodiment, it is possible to easily and inexpensively manufacture a plate-shaped form made of a non-conductive member so as to bury the sound absorbing member 12 to be installed. On the contrary, a space 17 having a function as a vibration isolation space is provided without contacting. Further, the surface protection member 14 is constructed by providing a space 17 on the upper surface side of the installed sound absorbing member 12.
[0030]
Therefore, not only does the sound absorbing member 12 not be damaged by long-term use, but also the vibration isolation function can be exhibited by the space 17.
【The invention's effect】
Thus, the present invention has the above configuration. With the slab track sound absorbing device according to the present invention, noise generated by running vibration on a slab track such as a railway track can be efficiently absorbed by forming a space, and the cost can be reduced.
[0031]
And when exchanging a pair of installed rail, there exists an outstanding effect that the replacement | exchange operation | work of a rail can be performed, without removing the sound absorption apparatus already installed in the track | orbit.
[Brief description of the drawings]
FIG. 1 is a schematic plan view illustrating a configuration of a sound absorbing device according to the present invention.
FIG. 2 is a schematic side view illustrating the configuration of a sound absorbing device according to the present invention.
FIG. 3 is a schematic front view illustrating the configuration of a sound absorbing device according to the present invention.
FIG. 4 is a schematic plan view illustrating the configuration of a support beam according to the present invention.
FIG. 5 is a schematic perspective view illustrating the configuration of a support beam according to the present invention.
FIG. 6 is a schematic configuration explanatory diagram for explaining a mounting state of the sound absorbing member and the surface protection member to the support beam.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Slab track 2 Sleeper 3 Rail 4 Support beam 5 Gap 6 Packing 7 Overhanging wall 8 Top surface 9 Placement part 10 Hole-in anchor 11 Mounting bolt 12 Sound absorbing member 13 Mounting hole 14 Surface protection member 15 Mounting fixture 16 End piece 17 Space

Claims (1)

A sound absorbing device for a slab track, in which a pair of rails are laid on sleepers installed at intervals in the longitudinal direction of the track,
A plurality of support beams are arranged in the gap between the sleepers and in the same direction as the sleeper installation direction, and are approximately the same length as the width between the pair of rails, and are in a non-contact state with the rails. Surface protection that protects the sound-absorbing member by attaching a sound-absorbing member with a space between the support beams attached between the rails and adjacent to each other in the longitudinal direction of the track. Install the member with a space on the top side of the sound absorbing member,
In the longitudinal direction of the track on both outer sides of the pair of rails, the support beams are arranged in the gap between the sleepers and the sleepers in the same direction as the sleeper installation direction, and the support beams installed adjacent to the track longitudinal direction are supported. between the beam mounting the sound absorbing member with a space between the sleepers upper surface, and wherein a space the surface protective member for protecting the sound-absorbing member to the sound absorbing material upper surface to cover an end portion side of the sleepers Attached,
The support beam has a substantially convex cross section, and a mounting portion is provided on each of the intermediate step portions on both sides in the width direction of the support beam, and the end of the sound absorbing member is fixed and installed, and the support beam A sound absorbing device for a slab track, wherein an end portion of the surface protection member is fixed to a top surface via a mounting fixture.

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