JP2009179191A - Noise insulation device for moving vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a noise insulation device for a moving vehicle having simple constitution and high noise insulation effect, being stored within a vehicle limit range of an existing railroad section, and capable of sufficiently securing insulating separation between a sound insulating board and a power collector. <P>SOLUTION: Sound insulating means (1L, 1R, 2L, 2R) are composed of a first sound insulating body 1L and a second sound insulating body 1R vertically provided along the vehicle body longitudinal direction in a chevron shape with a predetermined length in the both sides in the width direction of a vehicle body 10 opposed to equipment (12) on a roof 3. The first sound insulating body 1L is positioned rearward with respect to the advancing direction of the moving vehicle to the second sound insulating body 1R. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sound insulation device for a moving vehicle, and more particularly to a sound insulation device for a moving vehicle that blocks noise generated during travel from equipment installed on the roof of a vehicle body.

  The need for further speeding up of moving vehicles, particularly the Shinkansen running at high speed, is increasing year by year, and commercial operation at a speed exceeding 300 km / h is being realized.

  However, as the speed of railways increases, there is a concern about an increase in noise generated during travel from equipment installed on the roof of the vehicle body, particularly from the vicinity of the current collector, and countermeasures are urgently needed.

  On the other hand, the Shinkansen that travels in the conventional section like the mini Shinkansen has a narrower vehicle limit range, so the restrictions on the vehicle width and height are more severe than those on the Shinkansen section. It is also desired to reduce the size of a device for insulating (blocking) generated noise.

  Thus, in order to achieve noise reduction and sound insulation based on equipment such as a current collector installed on the roof of the body of a moving vehicle, a sound insulation device such as that described in Patent Document 1 has already been proposed. Has been.

  That is, the sound insulation device described in Patent Document 1 proposes that the current collector is covered with a windproof cover and a sound insulation wall for sound insulation is provided outside the windproof cover.

JP-A-8-98306

  The sound insulation device described in Patent Document 1 is provided with a windproof cover, thereby increasing the cross-sectional area of the vehicle body. As a result, running resistance increases and tunnel micro-pressure waves due to compression waves at the time of tunnel entry increase. Problems arise.

  Further, in order to ensure an insulation distance from the current collector, a portion of the windproof cover that approaches the current collector is cut out. As a result, a problem arises in that noise is generated due to pressure fluctuations during traveling of the vehicle at the notch.

  In view of the above problems, in order not to increase the cross-sectional area of the vehicle body, it is desirable to install only a sound insulation board (sound insulation wall) to obtain a sound insulation effect of noise of a current collector or other equipment installed on the roof. Furthermore, considering the vehicle limit range in the conventional line section, the height of the sound insulation board must be lower than that of the conventional sound insulation board. Further, in order to prevent a ground fault between the sound insulating plate and the horn or insulator of the current collector, it is desirable to secure an insulation separation between the sound insulating plate and the current collector.

  An object of the present invention is for a mobile vehicle that has a simple configuration and a high sound insulation effect, is within the vehicle limit range of a conventional line section, and can sufficiently secure an insulation separation between the sound insulation plate and the current collector. The object is to provide a sound insulation device.

  In order to achieve the above object, according to the present invention, there is provided a first sound insulation means in which a sound insulation means is erected in a mountain shape with a predetermined length along the longitudinal direction of the vehicle body on both sides in the width direction of the vehicle body facing the equipment on the roof. The first sound insulation body is positioned rearward with respect to the traveling direction of the moving vehicle with respect to the second sound insulation body.

  In a moving vehicle having equipment installed on the roof, which becomes a noise source when traveling, there is a phenomenon that the noise source around the equipment moves backward relative to the traveling direction of the vehicle when the vehicle moves. It has been confirmed. For this reason, when the noise observer (or residential area) is on the left side with respect to the vehicle traveling direction, the left sound insulation body with respect to the vehicle traveling direction and the rear side in the vehicle traveling direction with respect to the right sound insulation body The sound can be insulated more efficiently by moving to the right. In addition, the installation position of the sound insulators located on the left and right sides with respect to the vehicle traveling direction is displaced in a direction along the vehicle traveling direction to alternate the arrangement, thereby preventing the resonance phenomenon between the two sound insulators. The sound insulation effect of noise generated from the equipment installed on the roof can be enhanced.

  Furthermore, the installation position of the sound insulators on the left and right sides with respect to the vehicle traveling direction is displaced in a direction along the vehicle traveling direction to make a staggered arrangement, so that it is a sound insulator for devices that secure an insulation distance. An insulation separation can be ensured without providing a notch.

  In addition, when the sound insulation plates on both sides are installed at the same position in the vehicle traveling direction without being alternated, the flow velocity increases due to the reduction of the flow path area between the sound insulation plates. Since the aerodynamic noise generated when the fluid passes around the equipment on the roof increases in proportion to the flow velocity, the increase in the flow velocity causes an increase in the aerodynamic noise. However, according to the present invention, since the sound insulators are not installed at the same position on the left and right, the increase in the flow velocity between the left and right sound insulators does not occur, and the increase in aerodynamic noise from the equipment on the roof is prevented. Can do.

  Further, according to the present invention, in the sound insulation device for a moving vehicle having the above-described configuration, the height of the first sound insulation body located rearward with respect to the traveling direction of the mobile vehicle is set lower than that of the second sound insulation body. .

  By configuring in this way, it is possible to prevent resonance and reverberation between the left and right sound insulation bodies, and to suppress the increase in noise from the peripheral part of the equipment on the roof and the generation of noise from the sound insulation device itself. it can.

  Still further, according to the present invention, in the sound insulation device for a moving vehicle having the above-described configuration, the first sub sound insulation body having a height lower than that of the first sound insulation body is connected to the first sound insulation body in the traveling direction of the moving vehicle. The second sub-insulation body having a height lower than that of the second sound insulation body is provided behind the second sound insulation body in the advancing direction of the moving vehicle.

  By comprising in this way, since the 1st and 2nd auxiliary | assistant sound insulation body extended in a substantially perpendicular direction from a vehicle body roof can be provided to such an extent that it does not interfere with an insulation separation area | region, a 1st and 2nd sound insulation body is included. Thus, the area of the entire sound insulation body can be increased, and the sound insulation effect can be enhanced.

  As described above, according to the present invention, the structure is simple, the sound insulation effect is high, and it is within the vehicle limit range of the conventional line section, and a sufficient insulation separation is ensured between the sound insulation plate and the current collector. A sound insulation device for a moving vehicle that can perform the above operation can be obtained.

  Hereinafter, a first embodiment of a sound insulation device for a moving vehicle according to the present invention will be described with reference to FIGS.

  As shown in FIG. 2, a moving vehicle traveling on a track 11 is formed by connecting a plurality of vehicles 10, and one of the on-roof installation devices is arranged on the roof of a specific vehicle among the plurality of vehicles 10. The current collector 12 is installed.

  As shown in FIG. 1, the current collector 12 includes an insulator 6 fixed to the roof 3 of the vehicle 10, a base frame 4 supported by the insulator 6, and a current collector fixed to the base frame 4. It comprises a device hinge portion 8, a current collector arm 7 pivotally supported by the current collector hinge portion 8, and a current collector hull 5 pivotally supported at the tip of the current collector arm 7. Yes.

A first sound insulator 1L is provided on one side in the width direction of the roof 3 of the vehicle body 10, specifically on a portion facing the insulator 6 that is rearward with respect to the vehicle traveling direction (arrow A). A second sound insulator 1R is provided in a portion facing the insulator 6 that is forward with respect to the vehicle traveling direction (arrow A) to form a gratitude device. These first sound insulating member 1L and the second sound insulating member 1R, along the vehicle traveling direction is a plate body formed in Yamagata, the height H _L and H _R up to the top portion, substantially insulator It has a height dimension equivalent to the height dimension of 6. The first sound insulator 1L and the second sound insulator 1R do not overlap in the vehicle traveling direction when viewed from the side, in other words, are installed at non-overlapping positions in the vehicle traveling direction.

  In this way, the first sound insulator 1L and the second sound insulator 1R are installed at non-overlapping positions in the vehicle traveling direction of the roof 3 when viewed from the side, so that the first sound insulator 1L is the second sound insulator. It will be located behind 1R in the vehicle traveling direction.

  When the vehicle 10 equipped with the sound insulation device having the above-described configuration is caused to travel in the direction of arrow A, traveling wind flows in the direction opposite to that of arrow A. This traveling wind generates noise from the boat body 5, the insulator 6, the current collector arm 7 and the like of the current collector 12 which is one of the rooftop devices. In this configuration, the noise is aimed at sound insulation.

  According to the present embodiment, the staggered installation of the first sound insulator 1L and the second sound insulator 1R reduces noise from the current collector hull 5, the current collector insulator 6, and the current collector arm 7. Sound insulation can be performed efficiently. The reason is that, as the vehicle 10 moves, the noise source of the current collector 12 moves rearward relative to the vehicle traveling direction, so that the noise observer (or residential area) moves in the vehicle traveling direction. On the other hand, when the vehicle is on the left side, the first sound insulator 1L installed on the left side with respect to the vehicle traveling direction is displaced rearward in the vehicle traveling direction with respect to the second sound insulator 1R installed on the right side. Sound insulation is possible.

  In addition, the first sound insulator 1L and the second sound insulator 1R having a mountain shape approximately the height of the insulator 6 are alternately installed, so that the first sound insulator 1L and the second Since the two sound insulators 1R face each other in the vicinity of the mountain-shaped hem, a sufficient insulation distance can be secured without providing a notch.

  Furthermore, the flow velocity between the left and right first sound insulators 1L and the second sound insulators 1R is provided by alternately installing the first sound insulators 1L and the second sound insulators 1R having a height approximately equal to the height of the insulator 6. Increase of aerodynamic noise from the current collector 12 can be prevented, and the first sound insulator 1L and the second sound insulator 1R can be kept within the vehicle limit range of the conventional line. .

  In addition, the left and right first sound insulators 1L and second sound insulators 1R are approximately the height of the insulator 6, so that the portion exposed to the traveling wind is relatively small, and the first sound insulator 1L. And the aerodynamic noise generated from the second sound insulator 1R can be reduced.

  As described above, according to the present embodiment, the sound insulation effect can be enhanced by installing the first sound insulation body 1L and the second sound insulation body 1R with simple configurations, and the conventional line section is within the vehicle limit range. Even if the sound insulation plate having the maximum height is used, an insulation distance can be secured and a sound insulation effect can be obtained.

  It should be noted that the rising inclination angles of the front and rear edges of the mountain-shaped first sound insulator 1L and the second sound insulator 1R are preferably 10 to 45 degrees in order to suppress aerodynamic noise.

  Next, a second embodiment of the sound insulation device for a moving vehicle according to the present invention will be described with reference to FIGS. Since the same reference numerals as those in FIGS. 1 and 2 indicate the same components, detailed description thereof will not be repeated.

In this embodiment, configurations different from the first embodiment are that the lower than the height H _R of the height H _L of the first sound insulating member 1L Yamagata second sound insulating member 1R , these first sound insulating member 1L and height H _L of the second sound insulating member _1R, H less height half than _R low first sub sound insulating member 2L and the second sub-sound insulating member 2R It is a point provided. The first sub sound insulation body 2L and the second sub sound insulation body 2R are connected to the front side in the vehicle traveling direction of the first sound insulation body 1L in the first sub sound insulation body 2L. In the second sub-sound insulator 2R, the second sound insulator 1R is formed so as to face the first sound insulator 1L continuously to the rear side in the vehicle traveling direction.

  With this configuration, the same effect as the above embodiment can be obtained, and noise from the current collector can be insulated over a wide range.

  FIG. 5 shows a third embodiment of a sound insulation device for a moving vehicle according to the present invention. The same reference numerals as those in FIGS.

  In the present embodiment, the vehicle traveling direction of the first sound insulation body 1L, the first sub sound insulation body 2L, and the second sound insulation body 1R and the second sub sound insulation body 2R with respect to the second embodiment. The installation position was reversed, and the sound was cut in consideration of the case where the observer (or residential area) of the noise was on the right side of the vehicle traveling direction. Further, the sound insulation effect can be enhanced when the installation position of the insulator 6 has to be installed close to the second sound insulation body 1R and the second sub sound insulation body 2R on the right side with respect to the vehicle traveling direction.

  FIG. 6 shows a fourth embodiment of the sound insulation device for a moving vehicle according to the present invention, and the same reference numerals as those in FIGS.

  In the present embodiment, when the noise observer (or residential area) is on the right side of the vehicle traveling direction, the first sound insulator 1R provided on the right side of the vehicle traveling direction is provided on the left side. It was formed so as to have an H dimension higher than that of the sound insulator 1L.

  By configuring in this way, it is possible to prevent the sound wave reflected by the first sound insulator 1R from staying between the left and right first sound insulators 1L and 2R, and as a result, the first It is possible to prevent the sound insulation effect from being reduced by the sound insulation body 1L and the second sound insulation body 1R, and the resonance phenomenon between the first sound insulation body 1L and the second sound insulation body 1R. Of course, when the noise observer (or residential area) is on the left side with respect to the vehicle traveling direction, the first sound insulator 1R needs to be H dimension lower than the second sound insulator 1L provided on the left side. is there.

  FIG. 7 shows a fifth embodiment of the sound insulation device for a moving vehicle according to the present invention. The same reference numerals as those in FIGS. 1 to 6 denote the same components, and thus detailed description thereof is omitted.

  In the present embodiment, when a noise observer (or residential area) is on the left side with respect to the vehicle traveling direction, the vehicle travels by the first sound insulator 1L installed on the left side behind the vehicle traveling direction. The length of the direction is longer than the second sound insulation body 1R installed on the right side in front of the vehicle traveling direction, and the end of the first sound insulation body 1L in the vehicle traveling direction is the second side when viewed from the side. It was installed so as to overlap the sound insulator 1R.

  According to the present embodiment, the aerodynamic noise caused by the separation vortex generated by the separation of the flow at the rear edge position of the second sound insulator 1R can be insulated by the first sound insulator 1L overlapped when viewed from the side surface. The sound insulation effect can be enhanced.

  Of course, when the noise observer (or residential area) is on the right side with respect to the vehicle traveling direction, the installation positions of the first sound insulation body 1L and the first sound insulation body 1R are reversed, and the second on the right side. The length of the sound insulator 1R may be long.

  FIG. 8 shows a sixth embodiment of the sound insulation device for a moving vehicle according to the present invention. The same reference numerals as those in FIGS. 1 to 7 denote the same components, and thus detailed description thereof is omitted.

  In the present embodiment, the inclined portions 1LT and 1RT that are inclined in directions away from each other are formed at the upper ends of the left and right first sound insulators 1L and the second sound insulator 1R.

  According to the present embodiment, by forming a non-parallel portion at the upper end portion, it is possible to suppress acoustic resonance and reverberation phenomenon that occur between the first sound insulator 1L and the second sound insulator 1R, As a result, it is possible to reduce noise from the periphery of the current collector 12. In addition, as shown by a two-point difference line, the inclined portions 1LT and 1RT may be inclined in a direction approaching each other.

  Next, in order to confirm the sound insulation effect of the sound insulation device for a moving vehicle according to the present invention, a noise measurement test using a scale model was performed in a low noise wind tunnel. In this wind tunnel test, a model of the current collector 12, the first sound insulation body 1L, the second sound insulation body 1R, the first sub sound insulation body 2L, the second sub sound insulation body 2R, and the roof 3 is manufactured. The aerodynamic noise was measured by installing it in the airflow from the wind tunnel outlet.

  Only the current collector and the configuration (A) of Example 2 (FIGS. 3 and 4), the configuration (B) in which the sound insulating plate shown in FIG. There are three types of configuration (C).

  9, the same reference numerals as those in FIGS. 1 to 8 denote the same components. However, in FIG. 9, the first sound insulator has two first sound insulators 1L1 and 1L2 and two second sound insulators 1R1 and 1R2 in the longitudinal direction, and a recess G is formed therebetween to collect current. The insulation separation between the insulator 6 and the horn of the device 12 is ensured.

  FIG. 10 shows the above configuration (C), and no sound insulation means is provided around the current collector. Therefore, the configuration (C) shown in FIG. 10 is a configuration for obtaining a reference noise for evaluating the effect of the sound insulation device.

  In this wind tunnel test, the current collector hull 5 was evaluated for each of the state where the current collector hull 5 was sliding on the overhead wire and the state where it was lowered away from the overhead wire, and the upstream side and the downstream side with respect to the direction of the wind tunnel flow. The noise was measured by moving the microphone.

  FIG. 11 shows the noise measurement results assuming that the current collecting hull 5 is sliding on the overhead wire. Indicated by A value. Here, O.D. A. The value A represents A characteristic correction. From the measurement results, it can be seen that when the configuration (C) is used as a reference, the configuration (A) has a significant sound insulation effect compared to the configuration (B).

  FIG. 12 shows the 1/3 octave band analysis result of the noise measurement result.

  According to FIG. 12, although the configuration (B) can block the peak sound seen in the vicinity of 200 Hz as compared with the configuration (C), the noise increases in a wide band. The A value is larger than that in the configuration (C). On the other hand, in the configuration (A), the increase in noise seen in the configuration (B) is not observed, and the noise O.D. A. The value was also lower than that in the configuration (C), and it was found that sound insulation could be achieved.

FIG. 13 shows the noise measurement results when the noise measurement position in the wind tunnel is measured by moving from the upstream side to the downstream side with respect to the direction of the wind tunnel flow. Here, as in FIG. 11, the noise O.D. A. The difference from the value is shown. From FIG. 13, the configuration (A) shows that the noise O.D. is higher than that in the configuration (C) even when the noise measurement position is moved from the upstream side to the downstream side with respect to the hull. A. The value is low and it can be seen that the sound insulation effect is obtained.
Next, the result of measuring the noise in a state where the current collecting boat 5 is lowered and separated from the overhead line will be described. FIG. 14 shows the noise O.D. When the vehicle traveling direction is the opposite direction (hereinafter referred to as the anti-swing direction), the noise O.I. A. Indicates the value. Similar to FIG. 11, the noise O.D. A. The noise O.D. of the configuration (A) and the configuration (B) with respect to this reference value is set as a reference value. A. The difference in values is shown in the graph. According to FIG. 14, even when the current collector hull 5 is lowered to the anti-swing direction, the configuration (A) has a reduced noise compared to the configuration (C), and a sound insulation effect is obtained. I understand.

  FIG. 15 shows the result of 1/3 octave band analysis of the noise measurement result when the current collecting hull 5 is lowered and the anti-swing direction is set. From the analysis result of FIG. 15, the configuration (A) can reduce noise in a frequency band of 630 Hz or more as compared with the configuration (C), and further can reduce the peak sound seen at 200 Hz. The effect is obtained. On the other hand, although the configuration (B) can reduce noise in a frequency band of 630 Hz or more, since the increase in noise in other frequency bands is remarkable, a sufficient sound insulation effect is not obtained as a whole.

  FIG. 16 shows the noise measurement when the anti-swing direction is taken with the current collecting hull 5 lowered and the noise measurement microphone is moved from the upstream side to the downstream side with respect to the direction of the wind tunnel flow. Results are shown. Here, as in FIG. 11, the noise O.D. A. The noise O.D. of the configuration (A) and the configuration (B) with respect to this reference value is set as a reference value. A. The difference in values is shown in the graph. As a result, the noise O.D. of the configuration (A) is higher than that of the configuration (C) even when the noise measurement position is moved from the upstream side to the downstream side. A. It can be seen that the value is low and the sound insulation effect is obtained. It can also be seen that both the noise reduction effect and the sound insulation effect are larger than those in FIG. In contrast, the configuration (B) has a noise O.D. A. It can be seen that the value is high and sufficient sound insulation effect is not obtained.

  As described above, according to the present invention, it can be seen that the effect of blocking noise generated during traveling from a device installed on the roof of the vehicle body is particularly remarkable.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of the vicinity of a current collector showing a first embodiment of a sound insulation device for a moving vehicle according to the present invention. The side view which shows the moving vehicle to which this invention is applied. The equivalent figure of FIG. 1 which shows 2nd Embodiment of the sound insulation apparatus for moving vehicles by this invention. FIG. 4 is a side view of FIG. 3. The equivalent diagram of FIG. 1 which shows 3rd Embodiment of the sound insulation apparatus for moving vehicles by this invention. The front view of the current collector vicinity which shows 4th Embodiment of the sound insulation apparatus for moving vehicles by this invention. FIG. 1 is a view corresponding to FIG. 1 showing a fifth embodiment of a sound insulation device for a moving vehicle according to the present invention. FIG. 6 is a view corresponding to FIG. 6 showing a sixth embodiment of the sound insulation device for a moving vehicle according to the present invention. FIG. 1 is a view corresponding to FIG. 1 corresponding to the prior art in which a recess is formed between two sound insulators installed on the side of the current collector. FIG. 1 is a view corresponding to FIG. 1, which is a reference configuration in which a sound insulator is not installed on the side of the current collector. Results of wind tunnel tests conducted with the current collector hull sliding on the overhead wire Graph showing difference in A value. The graph of the 1/3 octave band analysis result of the wind tunnel test result done in the state which the boat body for current collection was sliding on the overhead wire. The graph which showed the noise measurement result performed by changing the noise measurement position from the upstream side to the downstream side in the wind tunnel test performed in a state where the current collector boat slides on the overhead wire, and the amount of change from the reference value. The results of wind tunnel tests conducted with the current collector hull lowered and away from the overhead line were compared with noise O.D. Graph showing difference in A value. The graph of the 1/3 octave band analysis result of the wind tunnel test result done in the state which lowered the hull for current collection and separated from the overhead line. The graph which showed the noise measurement result which changed the noise measurement position from the upstream side to the downstream side by the amount of change from a reference value in the wind tunnel test done in the state where the current hull was lowered and separated from the overhead line.

Explanation of symbols

1L ... 1st sound insulation, 1R ... 2nd sound insulation, 1LT, 1RT ... inclined part, 2L ... 1st sub-sound insulation, 2R ... 2nd sub-sound insulation, 3 ... roof, 4 ... underframe, DESCRIPTION OF SYMBOLS 5 ... Current collector boat body, 6 ... Insulator, 7 ... Current collector arm, 8 ... Current collector hinge part, 10 ... Vehicle, 11 ... Track, 12 ... Current collector, A ... Vehicle traveling direction, H ... Dimensions , H _L , H _R ... height dimension, G ... recess.

Claims (8)

  In the sound insulation device for a moving vehicle provided with sound insulation means around the equipment installed on the roof of the vehicle body, the sound insulation means has a predetermined length along the vehicle body longitudinal direction on both sides in the width direction of the vehicle body facing the equipment. The first sound insulator and the second sound insulator, which are erected in a mountain shape, are located rearward with respect to the traveling direction of the moving vehicle with respect to the second sound insulator. A sound insulation device for a moving vehicle.   In the sound insulation device for a moving vehicle provided with sound insulation means around the equipment installed on the roof of the vehicle body, the sound insulation means has a predetermined length along the vehicle body longitudinal direction on both sides in the width direction of the vehicle body facing the equipment. The first sound insulator and the second sound insulator are erected in a mountain shape, and the first sound insulator is located on the left side in both traveling directions of the moving vehicle, and the second sound insulator is a traveling vehicle. A sound insulation device for a moving vehicle, wherein the sound insulation device is located on the right side of the direction, and the first sound insulation body is located behind the second sound insulation body with respect to the traveling direction of the movement vehicle.   In the sound insulation device for a moving vehicle provided with sound insulation means around the equipment installed on the roof of the vehicle body, the sound insulation means has a predetermined length along the longitudinal direction of the vehicle body on both sides in the width direction of the vehicle body facing the equipment. It consists of a first sound insulator and a second sound insulator erected in a mountain shape, the first sound insulator is located on the left side in both traveling directions of the moving vehicle, and the second sound insulating body is in the traveling direction of the moving vehicle. Located on the right side, the first sound insulator is positioned rearward with respect to the traveling direction of the moving vehicle with respect to the second sound insulator, and is connected to the first sound insulating body in front of the traveling direction of the moving vehicle. A first sub sound insulator having a height lower than that of the first sound insulator is provided, and a second sub sound insulator having a height lower than that of the second sound insulator is provided behind the second sound insulator and behind the second sound insulator. A sound insulation device for a moving vehicle, characterized in that a sound insulation body is provided.   The first sound insulating body located on the left side with respect to the traveling direction of the moving vehicle is formed to be lower than the height of the second sound insulating body located on the right side with respect to the traveling direction of the moving vehicle. The sound insulation device for a moving vehicle according to claim 1 or 2.   In the sound insulation device for a moving vehicle provided with sound insulation means around the equipment installed on the roof of the vehicle body, the sound insulation means has a predetermined length along the vehicle body longitudinal direction on both sides in the width direction of the vehicle body facing the equipment. The first sound insulator and the second sound insulator are erected in a mountain shape, and the first sound insulator and the second sound insulator are displaced relative to the traveling direction of the moving vehicle. A sound insulation device for a moving vehicle.   6. The sound insulation device for a moving vehicle according to claim 5, wherein the first sound insulation body and the second sound insulation body are installed on the roof of the vehicle body at a non-overlapping position in the vehicle traveling direction when viewed from the side. .   The first sound insulator and the second sound insulator are installed in front of the vehicle traveling direction of the length of the first sound insulator installed rearward in the vehicle traveling direction. 6. The vehicle is characterized in that it is longer than the second sound insulator and is installed so that the vehicle sound direction end of the first sound insulator overlaps the second sound insulator as viewed from the side. Sound insulation device for mobile vehicles.   The sound insulation device for a moving vehicle according to claim 5, wherein each of the first sound insulation body and the second sound insulation body forms an inclined portion.

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