JP4145194B2 - Telescopic device for road bridge - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
More particularly, the present invention relates to a telescopic device for a road bridge, and more particularly, to disperse the frequency of sound generated as the vehicle passes through and reduce the sound pressure level at a specific frequency of the sound to reduce noise when the vehicle passes. The present invention relates to a telescopic device for road bridge.
[0002]
[Prior art]
Conventionally, as a support structure for an expansion device for a road bridge such as a road bridge installed on the ground, for example, as shown in FIG. 11, the expansion and contraction of the road bridges 1 a and 1 b at a fixed distance interval is provided on the road bridges 1 a and 1 b. A seam portion 3 having a concave cross section provided with a gap portion 2 for absorbing water is formed, and in the gap portion 2, a backup material 4 and a seal material 5 are disposed as a water stop material, and on the upper surface thereof A joint member 6 made of a rubber-like elastic body in which a reinforcing steel plate 7 or the like is embedded is installed so as to cover the gap portion 2 (see, for example, Patent Document 1).
[0003]
As another embodiment of the support structure, for example, as shown in FIG. 12, a joint member 6 made of a rubber-like elastic body is attached to the surface of a metal load support member 8, and the load support member 8 is attached. In addition, there is also known one installed in the joint portion 3 having a concave cross section so as to cover the gap portion 2.
[0004]
In addition, about another structure, the same component as the said prior art example attaches | subjects the same code | symbol, and abbreviate | omits description.
[0005]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 11-323810 (pages 2 to 3 and FIG. 1)
[0006]
[Problems to be solved by the invention]
By the way, a concave portion Q for absorbing expansion and contraction of the road bridges 1a and 1b is formed on the surface of the joint member 6 made of a rubber-like elastic body in a direction perpendicular to the bridge axis direction. There are many cases in which passing sounds and vibrations are generated as vehicles pass through, causing discomfort to passengers in passing vehicles and causing noise pollution to neighboring residents. Reduction of noise when passing through a vehicle in the apparatus has been a problem.
[0007]
The present invention pays attention to such conventional problems, and reduces the peak value of the sound pressure level of the specific frequency by dispersing the frequency of the sound generated as the vehicle passes, and improves the sound quality to improve the sound quality when passing the vehicle. An object of the present invention is to provide a road bridge telescopic device capable of reducing noise.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the expansion device for a road bridge according to the present invention disperses the frequency of sound generated when passing a vehicle on the road surface side surface of a joint member made of a rubber-like elastic body, and the sound pressure of a specific frequency of sound. A groove having various patterns for reducing the level is formed, and the groove forms a plurality of groove-shaped grooves from one end to the other end in the longitudinal direction of the joint member that is perpendicular to the passing direction of the vehicle. A zigzag groove formed by arranging the joint members at an unequal pitch in the longitudinal direction of the joint member, and so as to be parallel to both sides of the zigzag groove so as to be continuous from one end to the other end in the longitudinal direction of the joint member. The gist of the present invention is that the zigzag groove is formed .
Here, the zigzag grooves formed by disposing the plurality of the groove-shaped grooves continuously from one end to the other end in the longitudinal direction of the joint member that is orthogonal to the passing direction of the vehicle at an unequal pitch; A plurality of connecting grooves for connecting the zigzag grooves formed so as to be arranged in parallel on both sides of the zigzag groove are formed at unequal pitches in the longitudinal direction of the joint member, and have different sizes in the central portion in the passing direction of the vehicle. A plurality of substantially diamond-shaped blocks can be formed in parallel.
[0009]
Further , another road bridge expansion and contraction device of the present invention disperses the frequency of the sound generated when the vehicle passes on the road surface side surface of the joint member made of a rubber-like elastic body, thereby reducing the sound pressure level of the specific frequency of the sound. A groove having various patterns for reduction is formed, and the groove makes a plurality of groove-shaped grooves continuous from one end to the other end in the longitudinal direction of the joint member that is perpendicular to the passing direction of the vehicle. The zigzag groove formed by disposing the joint member at an unequal pitch in the longitudinal direction of the joint member, and a plurality of dog-shaped grooves from one end in the longitudinal direction of the joint member so as to be parallel to both sides of the zigzag groove. A zigzag groove formed by discontinuously disposing up to the other end, and a sipe that intersects each of the dog-shaped grooves constituting the zigzag groove formed by discontinuously disposing The summary A.
[0010]
As described above, by forming the concave grooves having various patterns for dispersing the sound frequency on the road surface side surface of the joint member, the peak of the sound pressure level of the specific frequency of the sound generated as the vehicle passes is obtained. The value can be reduced and the sound quality can be improved by dispersing the frequency of the generated sound to reduce the noise.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
[0012]
In addition, in the following description, description of the same component as the support structure of the conventional expansion device for road bridges is abbreviate | omitted.
[0013]
1 (a) is a plan view of the joint member 11 made of a rubber-like elastic body of a road bridge for telescopic device showing a first reference embodiment, FIG. 1 (b), A-A arrow in FIGS. 1 (a) A sectional view is shown, and a groove 12 is formed in the road surface side surface 11 a of the joint member 11.
[0014]
That is, the concave groove 12 in the first reference embodiment intersects at a predetermined angle α with respect to the vehicle passing direction (for example, the direction of the bridge axis of the bridge or the direction in which the road branches such as a road junction). A plurality of concave grooves 12a having the same pitch P is formed in the direction. The pitch P of the concave grooves 12 a is arbitrarily set by the length L and the width H of the joint member 11, and the depth t of the concave grooves 12 a is arbitrarily set by the thickness T of the joint member 11. .
[0015]
2A and 2B are a plan view showing a second reference form of the joint member 11 and a cross-sectional view taken along the line B-B, and the road surface side surface 11a of the joint member 11 has a concave portion. Grooves 12 are formed, and there are a plurality of concave grooves 12 of this reference form in four types of unequal pitches P1, P2, P3, and P4 in a direction that intersects the vehicle passing direction at a predetermined angle α. A concave groove 12b is formed.
[0016]
The arrangement of the unequal pitches P1, P2, P3, and P4 in the length L direction of the joint member 11 can be arranged arbitrarily or at a constant period.
[0017]
Since other configurations are the same as those of the first reference embodiment, the same reference numerals are given and description thereof is omitted.
[0018]
In the first reference embodiment and the second reference embodiment described above, the level of sound pressure with respect to frequency (relative value) of sound generated (relative value), a comparison experiment is a graph explanatory diagram shown in FIG 3, the first as in the second reference embodiment, the joint member 11 on the road surface 11a, by forming the groove 12b of the irregular pitch P1, P2, P3, P4, of the first referential embodiment of forming a groove on an equal pitch Compared with the joint member, the frequency of the sound generated when the vehicle passes can be dispersed to reduce the sound pressure level of the specific frequency of the sound, and the noise can be reduced.
[0019]
4 and 5 are plan views respectively showing a third reference embodiment and a fourth reference embodiment of the joint member 11 of the present invention. The concave groove 12 of the third reference embodiment of FIG. 4 is arranged in the vehicle passing direction. A plurality of concave grooves 12b having unequal pitches P1 to P4 in a direction intersecting with each other, and a plurality of regularly formed step-like concave grooves 13a intersecting with the plurality of concave grooves 12b. It is composed.
[0020]
Further, the concave groove 12 of the fourth reference form of FIG. 5 is a plurality of concave grooves 12b having an unequal pitch P1 to P4 in a direction intersecting with the passing direction of the vehicle, and the plural concave grooves 12b. And a plurality of regularly formed inclined linear grooves 13b intersecting with each other.
[0021]
Also in the 3rd reference form and the 4th reference form of this joint member 11, like the 2nd reference form of the 1st reference form which formed the ditch | groove regularly like the above-mentioned 2nd reference form, as shown in the graph explanatory view shown in FIG. Compared with the joint member, the frequency of sound generated when the vehicle passes can be dispersed, the sound pressure level of the specific frequency of the sound can be reduced, and noise can be reduced.
[0022]
Further, FIGS. 6 and 7 is a plan view showing a first embodiment and the second embodiment of the joint member 11 of this invention, respectively, grooves 12 of the first embodiment of FIG. 6, the passage of the vehicle A zigzag main groove 14 formed in a direction intersecting the direction and at an unequal pitch, and formed in parallel on both sides of the zigzag main groove 14 and constituted by a continuous zigzag subgroove 14a. is there.
[0023]
In addition, the concave grooves 12 of the second embodiment of FIG. 7 are formed in a zigzag main groove 14 formed at an unequal pitch in a direction intersecting the vehicle passing direction, and on both sides of the zigzag main groove 14. The zigzag subgrooves 14b are formed in parallel and are discontinuous, and short sipes 14c are formed in the discontinuous zigzag subgrooves 14b.
[0024]
Similar to the second reference embodiment, the first embodiment and the second embodiment are also compared with the joint member of the first reference embodiment in which concave grooves are regularly formed as shown in the graph explanatory view shown in FIG. The frequency of sound generated when the vehicle passes can be dispersed, the sound pressure level of the specific frequency of the sound can be reduced, and noise can be reduced.
[0025]
Furthermore, FIGS. 8-10 shows the top view, bottom view, and CC arrow sectional drawing of 3rd Embodiment of the coupling member 11 of this invention, and this 3rd Embodiment is vehicle passing. A plurality of (three in this embodiment) zigzag grooves 15a, 15b, and 15c formed in an unequal pitch in a direction intersecting the direction, and the plurality of zigzag grooves 15a, 15b, and 15c are provided. In the center of the road surface side surface 11a of the joint member 11, a plurality of substantially rhombic blocks 17 having different sizes are arranged in two rows in parallel. Is formed.
[0026]
Similar to the second reference embodiment, this embodiment also occurs when the vehicle passes as compared to the joint member of the first reference embodiment in which concave grooves are regularly formed as shown in the graph explanatory view shown in FIG. The sound frequency can be dispersed, the sound pressure level of the specific frequency of the sound can be reduced, and the noise can be reduced.
[0027]
As described above, in each of the first to third embodiments of the present invention, the groove 12 having various patterns for dispersing the frequency of the generated sound is formed on the road surface side surface 11a of the joint member 11. The peak value of the sound pressure level of the specific frequency of the sound generated as the vehicle passes can be reduced, and the sound quality can be improved by distributing the frequency of the sound generated as the vehicle passes to reduce noise. It can be planned.
[0028]
In addition, it is also possible to arrange | position said concave groove 12 in the same direction as the direction through which a vehicle passes.
[0029]
【The invention's effect】
As described above, the present invention provides the grooves on the road surface side of the joint member having various patterns for dispersing the frequency of the sound generated when the vehicle passes and reducing the sound pressure level of the specific frequency of the sound. Since it is formed, the peak value of the sound pressure level of the specific frequency of the sound generated as the vehicle passes can be reduced, and the sound quality can be improved by dispersing the frequency of the sound generated as the vehicle passes It is possible to reduce noise, and this has the effect of giving discomfort to passengers of passing vehicles and preventing noise pollution to neighboring residents.
[Brief description of the drawings]
FIG. 1A is a plan view of a joint member made of a rubber-like elastic body of a road bridge telescopic device showing a first reference embodiment, and FIG. 1B is a cross-sectional view taken along the line AA in FIG. is there.
FIG. 2 (a) is a plan view of a joint member made of a rubber-like elastic body of a road bridge telescopic device showing a second reference embodiment of the present invention, and FIG. 2 (b) is a view taken along the line BB in FIG. It is sectional drawing.
FIG. 3 is a graph explanatory view showing a relationship between a sound frequency and a sound pressure level value generated when a joint member of the second reference embodiment and a joint member of the first reference embodiment pass through the vehicle.
FIG. 4 is a plan view of a joint member showing a third reference embodiment of the present invention.
FIG. 5 is a plan view of a joint member showing a fourth reference embodiment of the present invention.
FIG. 6 is a plan view of the joint member showing the first embodiment of the present invention.
FIG. 7 is a plan view of a joint member showing a second embodiment of the present invention.
8 is a plan view of a joint member of a third embodiment of the present invention.
9 is a bottom view of the joint member of FIG. 8. FIG.
10 is a cross-sectional view taken along the line CC in FIG.
FIG. 11 is a cross-sectional view of a conventional support structure for a road bridge telescopic device.
FIG. 12 is a cross-sectional view of another conventional support structure for a road bridge telescopic device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1a, 1b Road bridge 2 Spacing part 3 Seam part 4 Backup material 5 Seal material 6 Joint member 7 Reinforced steel plate 8 Load support member 11 Joint member 11a Road surface side surface 12, 12a, 12b, 13a, 13b Concave groove 14 Zigzag main groove 14a , 14b Zigzag subgroove 15a-15c Zigzag groove 16a, 16b Connecting groove 17 Block Q Recessed α Angle P Pitch L Joint member length H Width t Depth T Joint member thickness P1, P2, P3, P4 Unequal pitch

Claims (3)

In a road bridge expansion and contraction device in which a stretchable joint member made of a rubber-like elastic body is installed so as to cover the play gap formed in the joint portion of the road bridge,
On the road surface side surface of the joint member, grooves having various patterns are formed to disperse the frequency of sound generated when the vehicle passes and reduce the sound pressure level of the specific frequency of the sound. The plurality of dog-grooves are formed by continually extending from one end to the other end in the longitudinal direction of the joint member that is orthogonal to the passing direction of the vehicle, and arranged at unequal pitches in the longitudinal direction of the joint member. A road bridge expansion and contraction device comprising a zigzag groove and a zigzag groove formed so as to be continuous from one end to the other end in the longitudinal direction of the joint member so as to be parallel to both sides of the zigzag groove. A zigzag groove formed by arranging the plurality of dog-shaped grooves at an unequal pitch continuously from one end to the other end in the longitudinal direction of the joint member that is orthogonal to the vehicle passing direction, and the zigzag A plurality of connecting grooves for connecting zigzag grooves formed so as to be arranged in parallel on both sides of the groove are formed at unequal pitches in the longitudinal direction of the joint member, and a plurality of substantially different sizes are provided at the center in the passing direction of the vehicle. The expansion device for a road bridge according to claim 1 , wherein rhombus-shaped blocks are formed in parallel. In a road bridge expansion and contraction device in which a stretchable joint member made of a rubber-like elastic body is installed so as to cover the play gap formed in the joint portion of the road bridge,
On the road surface side surface of the joint member, grooves having various patterns are formed to disperse the frequency of sound generated when the vehicle passes and reduce the sound pressure level of the specific frequency of the sound. The plurality of dog-grooves are formed by continually extending from one end to the other end in the longitudinal direction of the joint member that is orthogonal to the passing direction of the vehicle, and arranged at unequal pitches in the longitudinal direction of the joint member. A zigzag groove and a zigzag groove formed by discontinuously arranging a plurality of dog-shaped grooves from one end to the other end in the longitudinal direction of the joint member so as to be parallel to both sides of the zigzag groove, A telescopic device for a road bridge in which a sipe that intersects each of the dog-shaped grooves constituting the zigzag groove formed by discontinuous arrangement is formed.

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