Soundproofing system

Abstract

To provide a soundproof system having a simple structure and capable of being moved and installed easily.SOLUTION: A soundproof system comprises at least one or more first soundproof units 3 disposed along a noise source. The first soundproof unit 3 comprises: a pair of main frames 3a that are disposed opposite to each other in a direction along the noise source; a rod 3b that rigidly joins the pair of main frames 3a by standing on an installation surface; and a first soundproof sheet 3d that covers a front face side facing the noise source side and a back face side on the opposite side thereof by the top of a structure 3c formed of the pair of main frames 3a and the rod 3b being taken as a folding unit. The first soundproof sheet 3d is configured such that the front face side is folded about the folding unit and is freely attachable to the noise source.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a soundproofing system. [Background technology]

[0002] Among the work vehicles and work machines used in construction work and the like, there are some that are installed at the work site and used for long working hours per day, generating a lot of noise. For example, concrete pump vehicles and the like are vehicles that continue to operate at the installed position during concrete pouring work, generating a relatively large amount of noise. Techniques for suppressing such noise have been considered. In order to suppress the noise, soundproof sheets or soundproof walls are laid at the noise source, and the noise to the outside is absorbed by soundproofing materials, etc.

[0003] Patent Document 1 discloses a relatively simple noise barrier that can flexibly address a wide range of soundproofing needs and reduce a wide variety of noises caused by construction and civil engineering works, and that can reliably reduce a wide range of noises including those in the low frequency range. The barrier has a relatively simple structure and efficiently improves the sound insulation performance of the soundproof panels. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2007-284946 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, the invention described in Patent Document 1 is a fence with a mechanism in which soundproof panels are suspended on the outside of a support frame, and when construction vehicles or work machines need to be moved at a construction site, the work of dismantling and reassembling this fence is complicated, and there is a risk that it will take a long time to move it. In addition, it is necessary to secure a certain number of workers for the moving work, and depending on the height and length of installation, it may be necessary to arrange heavy machinery. In addition, when enclosing vehicles, at least one of the four sides must be left open to allow vehicles to enter and exit, making it difficult to maintain stability, and there are still issues with easy movement and reassembly.

[0006] The present invention has been made in consideration of the above-mentioned circumstances, and the problem that the present invention aims to solve is to provide a soundproofing system that has a simple structure and can be easily moved and installed. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention employs the following means. The soundproofing system of the present invention is a soundproofing system comprising at least one first soundproofing unit arranged along a noise source, wherein the first soundproofing unit comprises a pair of main frames arranged opposite each other in a direction along the noise source, a rod that rigidly connects the pair of main frames to an installation surface in a self-supporting state, and a first soundproofing sheet that covers a front side of a structure consisting of the pair of main frames and the rod, the top of which serves as a folded part, facing the noise source, and a back side on the opposite side, and the front side of the first soundproofing sheet is folded around the folded part so that it can be freely attached to the noise source.

[0008] In the present invention, the first soundproofing sheet of the first soundproofing unit arranged along the noise source can be folded around the front side fold portion and freely attached to the noise source, so that the first soundproofing sheet can be set to an appropriate shape depending on the location of the first soundproofing unit.

[0009] In one aspect of the present invention, the main frame of the first soundproof unit is an A-shaped frame, and the rod is a pipe. In this embodiment, the main frame of the first soundproofing unit is an A-shaped frame, so a simple structure is selected for the soundproofing unit, and noise generated from the noise source is effectively guided inside the structure consisting of the main frame and the rod by attaching a soundproofing sheet to the noise source.

[0010] In one aspect of the present invention, the legs of the main frame of the first soundproofing unit are provided with casters with stoppers. In this embodiment, the legs of the main frame are provided with casters with stoppers, making it easy to move the soundproofing unit.

[0011] In one aspect of the present invention, a soundproofing system comprises the above-mentioned first soundproofing unit and at least one second soundproofing unit arranged along a noise source, wherein the second soundproofing unit is a unit having a defined height H from the installation surface, a width W in the front-to-back direction relative to the noise source, and a length L extending along the installation surface, and comprises second soundproofing sheets arranged on left and right side surfaces facing each other in the length L direction, a back surface opposite the noise source in the width W direction, and an upper surface covering the space between the left and right side surfaces and the upper ends of the back surface, a support frame that supports the second soundproofing sheet so that an internal space is formed, and a suspended sound-absorbing material suspended from the support frame.

[0012] In this embodiment, in addition to the first soundproofing unit, at least one or more second soundproofing units are placed along the noise source, so that an appropriate soundproofing unit can be installed in an appropriate location depending on the conditions of the noise source.

[0013] In one aspect of the present invention, the suspended sound-absorbing material of the second soundproof unit is positioned in a position that forms a space between the noise source in the width W direction and the rear surface on the opposite side. In this embodiment, the suspended sound-absorbing material is positioned in a position that forms a space between the noise source in the width W direction of the second soundproofing unit and the rear surface on the opposite side, thereby forming a space corresponding to the main noise frequency of the noise source.

[0014] In one aspect of the present invention, the legs of the support frame of the second soundproofing unit are provided with casters with stoppers. In this embodiment, the legs of the support frame are provided with casters with stoppers, making it easy to move the soundproofing unit.

[0015] In one aspect of the present invention, there is provided a soundproofing system comprising the first soundproofing unit described above, the second soundproofing unit described above, and a coated soundproofing sheet covering an upper surface of a noise source, wherein the coated soundproofing sheet comprises a coated soundproofing sheet main body covering an upper surface of the noise source, and at least one sound-absorbing material attached to the coated soundproofing sheet main body. In this embodiment, in addition to the first soundproofing unit and the second soundproofing unit, a covering soundproofing sheet is provided to cover the upper surface of the noise source, so that appropriate soundproofing units and soundproofing sheets can be installed in appropriate locations and in appropriate parts depending on the condition of the noise source.

[0016] In one aspect of the present invention, the sound-absorbing material of the coated sound-proof sheet is attached to a mesh-shaped pocket provided in the coated sound-proof sheet body. In this embodiment, since the main body of the coated soundproof sheet is provided with mesh-like pockets, the sound-absorbing material can be attached to the coated soundproof sheet without reducing its effectiveness.

[0017] In one aspect of the present invention, the noise source is a concrete pump truck. In this embodiment, when applying the soundproofing system of the present invention, a noise source is selected as an example of a noise source that can be effectively soundproofed. Effect of the Invention

[0018] According to the present invention, it is possible to provide a soundproofing system that has a simple structure and can be easily moved and installed. [Brief description of the drawings]

[0019] [Figure 1] 1 is a perspective view of a first soundproofing unit of a soundproofing system according to an embodiment of the present invention. FIG. [Diagram 2] 1 is a front view of the main frame of a first soundproofing unit of a soundproofing system according to an embodiment of the present invention. FIG. [Diagram 3] 1 is a conceptual diagram illustrating a first soundproofing unit of a soundproofing system according to an embodiment of the present invention. FIG. [Figure 4] 2 is a side view of a second soundproofing unit of the soundproofing system according to an embodiment of the present invention. FIG. [Diagram 5] 2 is a plan view of a second soundproofing unit of the soundproofing system according to an embodiment of the present invention. FIG. [Figure 6] 2 is a perspective view of a second soundproofing unit of the soundproofing system according to an embodiment of the present invention. FIG. [Figure 7] 1 is a plan view of a covering soundproofing sheet of a soundproofing system according to an embodiment of the present invention. FIG. [Figure 8] 1 is a schematic plan view of a soundproofing system according to an embodiment of the present invention. [Figure 9] 1 is a schematic side view of a soundproofing system according to an embodiment of the present invention. [Figure 10] 1 is an image of a conventional soundproof enclosure. [Figure 11] 1 is an image of a soundproofing system according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] First, the investigations carried out in implementing the present invention and their results will be described. (About sound source detection) In carrying out the present invention, a concrete pump truck was targeted as the noise source, and sound source exploration was carried out to identify the location of the noise generation in the body of the concrete pump truck.

[0021] (Noise generated by concrete pump trucks as revealed by sound source survey and areas requiring countermeasures) Parts of a concrete pump truck where noise is particularly loud include the front of the vehicle, the lower rear part of the driver's seat (cab), and the swing valve near the ready-mixed concrete inlet. Other main areas where sound leaks out from the vehicle are the lower part around the entire circumference and the rear upper part of the vehicle (above the swing valve). Based on the results of these sound source investigations, the areas in particular requiring noise source countermeasures were determined to be (1) the front of the vehicle, (2) the lower sides of the vehicle, (3) the lower rear of the vehicle, and (4) the upper part of the vehicle.

[0022] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a soundproofing system according to the present invention will be described with reference to the accompanying drawings. (Embodiment) FIG. 8 is a schematic plan view of the soundproofing system 1 according to the embodiment of the present invention. FIG. 9 is a schematic side view of the soundproofing system 1 according to the embodiment. The soundproofing system 1 according to the embodiment is intended for a concrete pump vehicle as a noise source G. As shown in FIG. 8 and FIG. 9, the soundproofing system 1 includes at least one or more first soundproofing units 3 arranged along the noise source G, at least one or more second soundproofing units 5, and at least one or more covering soundproofing sheets 7 that cover the noise source G from above. In the present embodiment, the first soundproofing units 3 are arranged on the lateral lower part of the vehicle body and the rear lower part of the vehicle body of the concrete pump vehicle G, and the second soundproofing units 5 are arranged on the front part of the vehicle body. The covering soundproofing sheets 7 cover the upper part of the vehicle body of the concrete pump vehicle G. The concrete pump vehicle G is fixed to the ground at the work site by outriggers R extending in four directions from the center of the vehicle body. The height of the first soundproofing units 3 is set lower than the height of the outriggers R.

[0023] 1 is a perspective view of a first soundproofing unit 3 of a soundproofing system 1 according to this embodiment. The first soundproofing unit 3 includes a pair of main frames 3a arranged opposite to each other in a direction along a noise source G, rods 3b rigidly connecting the pair of main frames 3a to an installation surface in a self-supporting state, and a first soundproofing sheet 3d covering a front side of a structure 3c consisting of the pair of main frames 3a and the rods 3b, the top of which serves as a folded part, facing the noise source G, and a rear side on the opposite side, and the front side of the first soundproofing sheet 3d is folded back around the folded part so that it can be freely attached to the noise source G. The first soundproofing sheet 3d also covers the opposing main frame 3a from the outside.

[0024] FIG. 2 is a front view of the main frame 3a of the first soundproofing unit 3 in this embodiment. As shown in FIG. 1 and FIG. 2, in this embodiment, the main frame 3a is a frame formed in an A-shape, and the rod 3b is a pipe. The main frame 3a is provided with a connecting member 3g such as a clamp for rigidly connecting the rod 3b and the pair of main frames 3a. In this embodiment, the connecting member 3g is welded to the main frame. The main frame 3a and the rod 3b are connected by this connecting member 3g so that the structure 3c formed by the main frame 3a and the rod 3b is self-supporting. As shown in FIG. 1, inside the structure 3c, a sound-absorbing material 3k is attached by a mesh-shaped pocket 3e provided in the first soundproofing sheet 3d. The legs of the main frame 3a are provided with casters 3f with stoppers.

[0025] FIG. 3 is a conceptual diagram for explaining the first soundproofing unit 3 when used. As described above, the front side of the first soundproofing sheet 3d facing the noise source G is folded back around the folded back part, so that it can be freely attached to the noise source G. In this embodiment, a magnet 3h is attached to the end of the front side of the first soundproofing sheet 3d, and the first soundproofing sheet 3d is attached to the concrete pump vehicle G by magnetic force. In addition to the case of being attached to the concrete pump vehicle G, the soundproofing sheet on the front side of the first soundproofing sheet 3d is movable as shown by the arc arrow M, and can be set to a position F that covers the front side and a position B that opens the front side according to the state of the installation location. When attached to the concrete pump vehicle G, the sound absorbing material 3k inside absorbs sound leakage from the side of the vehicle body and diffusion into the sky (arrow U) and diffusion of ground reflected sound into the sky (arrow D). Also, because it is at an angle, the soundproof sheet surface is not parallel to the ground surface and the side of the vehicle body, so standing waves caused by noise from the vehicle body can be suppressed, making it easier to achieve a reduction effect. When the first soundproof unit 3 is placed at the location of the exhaust pipe of the concrete pump vehicle G, the soundproof sheet is set at position B, and the inside of the first soundproof unit 3 is open, allowing sufficient exhaust without stagnation of exhaust air. The actual dimensions of the first soundproof unit 3 may be, for example, about 900 mm in height.

[0026] FIG. 4 is a side view of the second soundproofing unit 5 according to the soundproofing system 1 of the present embodiment. FIG. 5 is a plan view of the second soundproofing unit 5. FIG. 6 is a perspective view of the second soundproofing unit 5. As shown in FIG. 4 and FIG. 5, the second soundproofing unit 5 is a unit in which the height H from the installation surface, the width W in the front-rear direction with respect to the noise source G, and the length L extending along the installation surface are specified, and the unit includes left and right side surfaces 5a positioned opposite to each other in the length L direction, a back surface 5b on the opposite side to the noise source G in the width W direction, a second soundproofing sheet 5d arranged on each of the top surface 5c covering the upper ends of the left and right side surfaces 5a and the back surface 5b, a support frame 5e that supports the second soundproofing sheet 5d so that an internal space is formed, and a suspended sound absorbing material 5f suspended from the support frame 5e.

[0027] The suspended sound-absorbing material 5f of the second soundproofing unit 5 is disposed at a position that forms a space S between the noise source G in the width W direction and the rear surface 5b on the opposite side. The noise source G side of the suspended sound-absorbing material 5f is open, and the side surface 5a and the top surface 5c of the open space are provided with sound-absorbing material 5g. The legs of the support frame 5e of the second soundproofing unit 5 are provided with casters 5h with stoppers. The width T of the space S between the suspended sound-absorbing material 5f and the rear surface 5b is preferably set to a quarter of the wavelength of the noise to be soundproofed. For example, in order to deal with noise with a frequency of about 250 Hz, the width T may be set to about 350 mm.

[0028] As shown in Fig. 5, an overlap 5h is provided at the end of the second soundproofing sheet 5d of the second soundproofing units 7 installed side by side, and adjacent second soundproofing units 7 are connected to each other with a removable tape or the like. Fig. 6 is a perspective view of the second soundproofing unit 7. As shown in Fig. 6, the second soundproofing units 7 connected by the overlap 5h are installed seamlessly to prevent leakage of noise from the noise source G. The actual dimensions of the second soundproofing unit may be, for example, about 1800 mm in height, about 900 mm in width, and about 1500 mm in length.

[0029] 7 is a plan view of the coated soundproof sheet 7 of the soundproof system 1 of this embodiment. The coated soundproof sheet 7 includes a coated soundproof sheet main body 7a that covers the noise source G from above, and at least one sound absorbing material 7b attached to the coated soundproof sheet main body 7a. The sound absorbing material 7b is attached to a mesh-shaped pocket 7c provided in the coated soundproof sheet main body 7a. A magnet 7d is provided at an end of the coated soundproof sheet main body 7a to fix the coated soundproof sheet 7 so as to cover the noise source G from above.

[0030] In the soundproofing system 1 according to this embodiment, the above-mentioned first soundproofing units 3, second soundproofing units 5, and soundproofing covering sheets 7 are installed on a concrete pump truck G, as shown in Figs. 8 and 9. Approximately seven first soundproofing units 3 are installed on each of the left and right lower sides of the vehicle body of the concrete pump truck G, and approximately two are installed on the lower rear part of the vehicle body. Three second soundproofing units 5 are installed on the front of the vehicle body. The soundproofing covering sheet covers the upper part of the vehicle body of the concrete pump truck G.

[0031] As described above, the soundproofing system 1 of this embodiment comprises a first soundproofing unit 3, a second soundproofing unit 5, and a covering soundproofing sheet 7, and can install effective soundproofing units and sheets in accordance with the conditions of each part of the noise source G, thereby enabling effective soundproofing measures to be taken.

[0032] The first soundproof unit 3 can be set to a position F in which the front side of the first soundproof unit 3 is folded back around the folded back portion, which closes the inside of the first soundproof unit 3 as shown in FIG. 3, a position B in which the inside of the first soundproof unit 3 is opened, and a position in which the first soundproof unit 3 is fixed to the noise source G by the magnet 3h, so that an appropriate form can be selected depending on the installation location of the first soundproof unit. For example, in a normal case, the first soundproof sheet 3d is fixed to the noise source G by the magnet 3h. At the location where the exhaust pipe of the noise source G is located, the first soundproof sheet 3d can be set to the open position B to promote sufficient exhaust. The main frame 3a of the first soundproof unit 3 is formed in an A-shape, and noise can be efficiently absorbed by the sound-absorbing material 3k attached to the diagonal inner surface on the back side opposite the noise source G. The legs of the main frame 3a are equipped with casters 3f with stoppers, so that the unit can be easily moved. The height of the first soundproofing unit 3 is set lower than the outriggers, so that soundproofing measures can be implemented without interfering with the outriggers.

[0033] In the second soundproof unit 5, a space S is formed between the suspended sound-absorbing material 5f and the back surface 5b, so that the sound absorbing effect corresponding to the desired frequency of the noise to be countered can be set by changing the width T of this space S. The legs of the support frame 5e are equipped with casters 5h with stoppers, so it is easy to move.

[0034] Since the multiple sound-absorbing materials 7b are attached to the sound-proofing sheet covering body 7a at spaced apart positions, the covering sound-proofing sheet 7 can reliably cover the uneven upper surface of the noise source G. Also, since the sound-absorbing materials 7b are attached to the mesh pockets at intervals, the sound-absorbing effect can be improved by spacing them apart without compromising the effect of the sound-absorbing materials. Since the noise source G is covered from above by this covering sound-proofing sheet 7, the noise can be prevented from diffusing upward.

[0035] The soundproofing system 1 in this embodiment can make a soundproofing enclosure for a concrete pump truck, which has been difficult to move and reassemble due to the large-scale construction such as putting a roof on it, and is therefore difficult to handle at construction sites, compact, effective, and easy to handle by combining movable soundproofing units with sound absorption properties. By reducing the height of the enclosure, the sense of oppression on neighbors can be reduced and safety during assembly and disassembly can be improved. In addition, because this soundproofing system 1 is compact, it is a particularly effective soundproofing enclosure for construction sites with narrow land in urban areas.

[0036] By combining the above-mentioned first soundproofing unit 3, second soundproofing unit 5, and soundproof covering sheet 7, the soundproof enclosure of the concrete pump truck can be configured and arranged according to the size of the vehicle body, thereby making it possible to take effective soundproofing and sound absorption measures against the noise source G. Therefore, even if the enclosure of the concrete pump truck is small, effective soundproofing measures can be implemented. Furthermore, these enclosures are made up of compact units that can be operated by one person, and they are easy to assemble in advance and move when moving around a concrete pump truck, making them an extremely effective noise control measure at construction sites.

[0037] Thus, it is possible to provide a soundproofing system 1 that has a simple structure and can be easily moved and installed. In this embodiment, a concrete pump truck is exemplified as the noise source G, but the noise source G is not limited to this, and the first soundproofing unit 3, the second soundproofing unit 5, and the soundproofing covering sheet 7 can be appropriately selected and installed as the soundproofing system 1 of the present invention for any equipment that generates noise according to the state of the noise. EXAMPLES

[0038] Next, a conventional example and an embodiment of the present invention will be described. Fig. 10 is an image showing a soundproof enclosure installed around a concrete pump truck as a soundproof system in the conventional example. Fig. 11 is an image showing the soundproof system of the present application. The results of the comparison are shown below in Table 1 for soundproofing with the conventional soundproof enclosure, Table 2 for scale comparison with the conventional soundproof enclosure, and Table 3 for assembly and movement time comparison with the conventional soundproof enclosure.

[0039] (Comparison of soundproofing with conventional soundproof enclosures) [Table 1]

[0040] (Compared to conventional soundproof enclosures) [Table 2]

[0041] (Comparison of assembly and movement time with conventional soundproof enclosures) [Table 3]

[0042] The above table reveals the following: (1) Noise measurements showed that the soundproof enclosure of the developed soundproofing system has soundproofing performance of approximately 10 dB at the front and approximately 5 dB at the sides compared to an untreated enclosure, and can also reduce noise into the air by approximately 1 to 2 dB. (2) Compared to conventional soundproof enclosures, the enclosure of the soundproof system of the present application generally has superior performance. (3) The soundproofing of the sides is approximately 2.3 dB lower than that of conventional soundproof enclosures, but the height of the enclosure is 1:4 lower, and the enclosure of the soundproofing system of the present application has advantages in terms of safety, ease of assembly, mobility, and other overall aspects. [Explanation of symbols]

[0043] 1. Soundproofing system 3. First soundproof unit 3a Main frame 3b rod 3c structure 3d No. 1 Soundproof Sheet 3e Mesh pocket 3k, 5g, 7b sound absorbing material 3f, 5h Casters with stoppers 5. Second soundproof unit 5a side 5b Back 5c Top 5d Second soundproof sheet 5e Support frame 5f Hanging sound absorbing material 7. Soundproofing Sheet 7a Covering soundproof sheet body 7c Mesh pocket G Noise source (concrete pump truck) H Height L Length S space W width T Width of space S 3g Connecting parts (clamps, etc.) 3h Magnet 7d Magnet

Claims

1. A soundproofing system comprising at least one first soundproofing unit disposed along a noise source, The first soundproof unit comprises: A pair of main frames arranged opposite to each other in a direction along the noise source; A rod body that rigidly connects the pair of main frames to an installation surface in a self-supporting state; A soundproofing system comprising a structure consisting of the pair of main frames and the rod body, with its top portion acting as a folded portion, and a first soundproofing sheet covering the front side facing the noise source and the rear side on the opposite side, wherein the front side of the first soundproofing sheet is folded around the folded portion so that it can be freely attached to the noise source.

2. 2. The soundproofing system of claim 1, wherein the main frame of the first soundproofing unit is an A-shaped frame and the rod is a pipe.

3. 3. The soundproofing system according to claim 1, wherein the legs of the main frame of the first soundproofing unit are provided with casters with stoppers.

4. A soundproofing system comprising a first soundproofing unit according to any one of claims 1 to 3 and at least one second soundproofing unit arranged along a noise source, The second soundproof unit is a unit having a height H from an installation surface, a width W in a front-rear direction with respect to a noise source, and a length L extending along the installation surface, a second soundproof sheet disposed on each of the left and right side surfaces facing each other in the length L direction, on a back surface opposite the noise source in the width W direction, and on an upper surface covering the upper ends of the left and right side surfaces and the back surface; a support frame that supports the second soundproof sheet so as to form an internal space; A soundproofing system comprising: a suspended sound-absorbing material suspended from the support frame.

5. The soundproofing system according to claim 4 , wherein the suspended sound-absorbing material of the second soundproofing unit is arranged at a position that forms a space between the noise source in the width W direction and a rear surface on the opposite side.

6. 6. The soundproofing system according to claim 4, wherein the legs of the support frame of the second soundproofing unit are provided with casters with stoppers.

7. A soundproofing system comprising: a first soundproofing unit according to any one of claims 1 to 3; a second soundproofing unit according to any one of claims 4 to 6; and a covering soundproofing sheet that covers an upper surface of a noise source, The coated soundproof sheet is A soundproof sheet body covering an upper surface of the noise source; At least one sound-absorbing material attached to the covered sound-proof sheet body.

8. The soundproofing system according to claim 7 , wherein the sound-absorbing material of the coated soundproofing sheet is attached to a mesh-like pocket provided in the coated soundproofing sheet body.

9. The soundproofing system according to claim 1 , wherein the noise source is a concrete pump truck.

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