Soundproof panel and soundproof wall structure using the same

Abstract

To provide a soundproof panel and a soundproof wall structure using the same, capable of improving workability through weight reduction and achieving a sufficient soundproof effect.SOLUTION: A soundproof panel is provided with a pair of flat plate-shaped outer plate-shaped members 11 disposed at an interval from each other in a thickness direction, and a corrugated inner plate-shaped member 12 disposed between the outer plate-shaped members 11. Since the respective outer plate-shaped members 11 are joined to the inner plate-shaped member 12 so as to be held at an interval in the thickness direction by the inner plate-shaped member 12, the whole soundproof panel can be constituted by only the plate-shaped member, and the weight can be remarkably reduced as compared with a conventional concrete soundproof panel. Further, since each outer plate-shaped member 11 is fixed so as to be in surface contact with each of joint surface parts 12b of the inner plate-shaped member 12, it is possible to suppress the vibration of each outer plate-shaped member 11 and reduce the vibration sound generated from each outer plate-shaped member 11.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a sound insulation panel used for a sound insulation wall installed on the side of, for example, a railway track, a highway, etc., and a sound insulation wall structure using the same.

Background Art

[0002] Generally, sound insulation walls are installed on the sides of railway tracks, highways, etc. to reduce the noise generated when vehicles travel nearby. In particular, high-speed vehicles such as bullet trains generate a large amount of noise, so the need for sound insulation walls is increasing.

[0003] Conventionally, as such a sound insulation wall, a concrete sound insulation panel has been installed. However, since the concrete sound insulation panel is heavy, it has to be installed using heavy machinery such as a crane truck, and there is a problem that the installation work becomes large-scale.

[0004] Further, as another structure of a sound insulation wall, there is known one using a sound insulation panel composed of a pair of flat plate-like members arranged at intervals in the thickness direction and a corrugated plate-like member arranged between the flat plate-like members (see, for example, Patent Document 1).

[0005] This sound insulation panel blocks sound by two flat plate-like members and the corrugated plate-like member between the flat plate-like members, and the sound insulation property is enhanced by the air layer between the flat plate-like members. Therefore, sufficient sound insulation performance can be obtained even if the plate thicknesses of the flat plate-like members and the corrugated plate-like member are reduced. As a result, there is an advantage that the weight of the sound insulation panel can be reduced and the workability at the installation site can be improved.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] Incidentally, in the conventional example using the corrugated plate-like member as described above, the inner surface of each flat plate-like member is joined to each top portion of the corrugated plate-like member. However, since a corrugated plate bent in a curved shape is used for the corrugated plate-like member, the joint portion between the inner surface of each flat plate-like member and each top portion of the corrugated plate-like member becomes a line contact. For this reason, due to the small contact points of each member, each flat plate-like member is likely to vibrate. When sound waves propagate through each flat plate-like member, each flat plate-like member generates vibration noise, and accordingly, there is a problem that the sound insulation effect is reduced.

[0008] The present invention has been made in view of the above problems, and an object thereof is to provide a sound insulation panel capable of enhancing workability by weight reduction and obtaining a sufficient sound insulation effect, and a sound insulation wall structure using the same.

Means for Solving the Problems

[0009] In order to achieve the above object, the present invention includes a pair of flat outer plate-like members arranged at intervals in the thickness direction with respect to each other, and a corrugated inner plate-like member arranged between the outer plate-like members. In the sound insulation panel in which each outer plate-like member is joined to the inner plate-like member so as to be held at intervals in the thickness direction by the inner plate-like member, the inner plate-like member includes a plurality of inclined surface portions inclined with respect to the outer plate-like member, and a plurality of flat joint surface portions joined so as to be in surface contact with the outer plate-like member. Each inclined surface portion is provided such that the inclination directions are alternately opposite to each other, and each joint surface portion is provided between the inclined surface portions, respectively.

[0010] As a result, each outer plate-like member is joined to the inner plate-like member such that the outer plate-like members are held at intervals in the thickness direction by the inner plate-like member. Thus, the entire soundproof panel is composed only of the plate-like members, and is significantly lighter than a conventional concrete soundproof panel. In this case, since each joint surface portion of the inner plate-like member is fixed so as to be in surface contact with each outer plate-like member, the contact area between each outer plate-like member and the inner plate-like member becomes large, the rigidity of the entire soundproof panel is increased, the vibration of each outer plate-like member is suppressed, and the vibration noise generated from each outer plate-like member is reduced.

[0011] Further, in order to achieve the above object, the soundproof wall structure of the present invention includes a plurality of holding members that hold the soundproof panel such that the thickness direction is horizontal. Each holding member has a concave portion with which the end portion in the width direction of the soundproof panel engages movably in the vertical direction. By engaging both end portions in the width direction of the soundproof panel from above with the concave portions of the holding members arranged at intervals in the width direction of the soundproof panel, the soundproof panel is held by the holding members.

[0012] As a result, in addition to the above action, by engaging the soundproof panel with the concave portion of the holding member, a soundproof wall can be easily formed.

Effect of the Invention

[0013] According to the soundproof panel of the present invention, since it can be significantly lighter than a conventional concrete soundproof panel, the soundproof panel can be installed without using a crane of a crane truck, and the workability can be improved. In this case, since the vibration of each outer plate-like member can be suppressed and the vibration noise generated from each outer plate-like member can be reduced, the soundproof effect can be enhanced as compared with a conventional one using a corrugated plate-like member bent in a curved shape.

[0014] Further, according to the soundproof wall structure of the present invention, since a soundproof wall can be easily formed by engaging the soundproof panel with the concave portion of the holding member, the workability at the installation site can be further improved.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0016] Figs. 1 to 7 show an embodiment of the present invention, and show a sound insulation panel used for a sound insulation wall installed on the side of, for example, a railway track or a highway, and a sound insulation wall structure using the same.

[0017] The sound insulation wall structure of this embodiment includes a plurality of sound insulation panels 10 and a plurality of holding members 20 that hold each sound insulation panel 10, and each sound insulation panel 10 and each holding member 20 are installed above a concrete foundation wall 30.

[0018] The sound insulation panel 10 includes a pair of flat outer plate-like members 11 arranged at intervals in the thickness direction, and a corrugated inner plate-like member 12 arranged between the outer plate-like members 11. Each outer plate-like member 11 is held at intervals in the thickness direction by the inner plate-like member 12. Further, both end portions in the width direction of the inner plate-like member 12 of each outer plate-like member 11 are covered by a pair of end plates 13, and each outer plate-like member 11, inner plate-like member 12, and each end plate 13 are formed of, for example, an acid-resistant coated steel plate.

[0019] Each outer plate-like member 11 is formed in a horizontally long rectangular shape, and vertical surface portions 11a extending vertically in one direction in the front-rear direction are provided at both upper and lower ends thereof. Further, a flange portion 11b extending outward in the vertical direction of the outer plate-like member 11 is provided at one end of one of the vertical surface portions 11a. Furthermore, a buffer member 11c made of, for example, rubber is provided on the outer surface side of one of the vertical surface portions 11a, and the buffer member 11c is formed to extend over the entire width direction of the outer plate-like member 11.

[0020] The inner plate-like member 12 is composed of a plurality of inclined surface portions 12a inclined with respect to the outer plate-like member 11 and a plurality of planar joint surface portions 12b joined so as to be in surface contact with the outer plate-like member 11. Each of the inclined surface portions 12a is provided such that the inclination directions are alternately opposite to each other, and each of the joint surface portions 12b is provided between the respective inclined surface portions 12a. In this case, the inner plate-like member 12 is formed such that the interval in the front-rear direction of each of the joint surface portions 12b is equal to the length in the front-rear direction of the vertical surface portion 11a of the outer plate-like member 11.

[0021] The end plate 13 is formed in a rectangular shape with one side equal to the length in the vertical direction of the outer plate-like member 11 and the other side equal to the length in the front-rear direction of the vertical surface portion 11a, and a pair of extending portions 13a extending in one direction in the width direction of the outer plate-like member 11 are provided at both ends in the front-rear direction thereof.

[0022] When assembling the sound insulation panel 10 having the above-described configuration, as shown in FIG. 3, a pair of outer plate-like members 11 are opposed to each other with their vertical directions reversed, and an inner plate-like member 12 is disposed therebetween. As shown in FIG. 2, the outer plate-like members 11 are arranged such that the vertical surfaces 11a thereof overlap each other. Next, each outer plate-like member 11 is fixed to each joint surface portion 12b of the inner plate-like member 12 from the outside with screws 14, thereby joining each outer plate-like member 11 and the inner plate-like member 12. At this time, each joint surface portion 12b of the inner plate-like member 12 is fixed in a state of surface contact with the inner surface of each outer plate-like member 11. Also, the vertical surfaces 11a of each outer plate-like member 11 are fixed to each other with screws 14. Then, end plates 13 are respectively attached to both sides in the width direction of each outer plate-like member 11, whereby a box-shaped sound insulation panel 10 surrounded by each outer plate-like member 11 and the end plates 13 is completed.

[0023] Each holding member 20 is made of an H-shaped steel material extending in the vertical direction, and is formed of, for example, an acid-resistant coated steel material. A pair of engaging portions 21 are provided on both sides in the width direction of the holding member 20, with which the width-direction ends of the sound insulation panel 10 engage movably in the vertical direction. Each engaging portion 21 is formed in a groove shape in which the distance in the front-rear direction is larger than the thickness dimension in the front-rear direction of the sound insulation panel 10.

[0024] When installing the sound insulation wall of the present embodiment, after installing each holding member 20 at intervals in the width direction on the upper end of a foundation wall 30 pre-constructed on the side of a railway or a road, a plurality of sound insulation panels 10 are attached between the holding members 20 as shown in FIG. 7. At this time, both side portions in the width direction of the sound insulation panel 10 are respectively engaged from above with the engaging portions 21 of the holding members 20 on both sides in the width direction. At this time, as shown in FIG. 5, a fixing fitting 22 is inserted into the gap between one surface in the front-rear direction of the sound insulation panel 10 and the engaging portion 21 of the holding member 20, thereby fixing the sound insulation panel 10 and the holding member 20.

[0025] By arranging a plurality of sound insulation panels 10 in a stacked manner one above the other in this way, a sound insulation wall composed of a plurality of vertically stacked sound insulation panels 10 in the vertical direction is formed between a plurality of holding members 20 in the width direction. At this time, as shown in FIG. 6, the end faces in the vertical direction of each sound insulation panel 10 are abutted against each other via the buffer member 11c, and the upper and lower ends on both the front and rear surfaces of the other sound insulation panel 10 are covered by the flange portion 11b of each sound insulation panel 10, so that the spaces between the sound insulation panels 10 stacked in the vertical direction are sealed.

[0026] Further, in the sound insulation panel 10, when noise such as the running sound of a vehicle is generated, it is blocked by one outer plate-like member 11, the inner plate-like member 12, and the other outer plate-like member 11. At this time, the sound wave is propagated from one outer plate-like member 11 to the other outer plate-like member 11 through each inclined surface portion 12a of the inner plate-like member 12. However, since each inclined surface portion 12a is formed longer than the vertical interval between the outer plate-like members 11, the propagation distance of the sound wave becomes longer by that amount, and the attenuation effect of the sound wave becomes higher. Also, the transmission loss of the sound wave is increased by the air layer between the outer plate-like members 11, and the sound insulation effect is enhanced.

[0027] In this case, since each outer plate-like member 11 is fixed so as to be in surface contact with each joint surface portion 12b of the inner plate-like member 12, the contact area between each outer plate-like member 11 and the inner plate-like member 12 becomes large, and the rigidity of the entire sound insulation panel is increased. As a result, the vibration of each outer plate-like member 11 is suppressed, and the vibration sound generated from each outer plate-like member 11 when the sound wave propagates through each outer plate-like member 11 is reduced.

[0028] Also, by setting the interval L between the outer plate-like members 11 to 100 mm or more, sufficient sound insulation performance due to the air layer between the outer plate-like members 11 can be obtained.

[0029] Thus, according to this embodiment, a pair of flat outer plate-like members 11 arranged at intervals in the thickness direction of each other, and a corrugated inner plate-like member 12 arranged between the outer plate-like members 11 are provided, and the outer plate-like members 11 are joined to the inner plate-like member 12 so as to be held at intervals in the thickness direction of each other by the inner plate-like member 12. Therefore, the entire sound insulation panel can be composed only of plate-like members, and can be significantly lightened compared to the conventional concrete sound insulation panel. As a result, the sound insulation panel 10 can be installed without using a crane of a crane truck, and the workability can be improved.

[0030] Further, the inner plate-like member 12 is composed of a plurality of inclined surface portions 12a inclined with respect to the outer plate-like member 11 and a plurality of flat joint surface portions 12b joined so as to be in surface contact with the outer plate-like member 11. Each inclined surface portion 12a is provided so that the inclination directions are alternately opposite to each other, and each joint surface portion 12b is provided between the inclined surface portions 12b. Therefore, each outer plate-like member 11 can be fixed so as to be in surface contact with each joint surface portion 12b of the inner plate-like member 12, and the contact area between each outer plate-like member 11 and the inner plate-like member 12 can be increased to enhance the rigidity of the entire sound insulation panel. As a result, the vibration of each outer plate-like member 11 can be suppressed and the vibration sound generated from each outer plate-like member 11 can be reduced, so that the sound insulation effect can be enhanced compared to the conventional one using a corrugated plate-like member bent in a curved shape.

[0031] Furthermore, since each outer plate-like member 11 has vertical surface portions 11a extending vertically from both ends in the vertical direction toward the other outer plate-like member 11, the outer plate-like members 11 can be assembled with each other so that the vertical surface portions 11a overlap each other, and a box-shaped sound insulation panel 10 can be easily formed.

[0032] Further, since each outer plate-like member 11 has a flange portion 11b that extends perpendicular to the vertical surface portion 11a from one side of the vertical surface portion 11a toward the outside of the outer plate-like member 11, when stacking the sound insulation panels 10 vertically, the flange portions 11b of each sound insulation panel 10 can cover the upper and lower ends on both sides in the front-rear direction of another sound insulation panel 10, and the space between each sound insulation panel 10 can be reliably sealed. Thereby, the sound insulation performance between the sound insulation panels 10 can be enhanced by the flange portions 11b, and the intrusion of rainwater into the sound insulation panels 10 can also be effectively prevented.

[0033] Furthermore, each outer plate-like member 11 is formed in a rectangular shape, and the inner plate-like member 12 is formed such that each inclined surface portion 12a and each joint surface portion 12b are arranged in the short side direction of each outer plate-like member 11. Therefore, the non-bending direction with high bending strength in the inner plate-like member 12 becomes the long side direction with large bending stress of each outer plate-like member 11, and the strength of the entire sound insulation panel can be enhanced.

[0034] Also, according to the sound insulation wall structure of the present embodiment, a plurality of holding members 20 for holding the sound insulation panel 10 with the thickness direction being the horizontal direction are provided. Each holding member 20 has a recess 21 in which the end portions in the width direction of the sound insulation panel 10 are movably engaged in the vertical direction. By engaging both end portions in the width direction of the sound insulation panel 10 with the recesses 21 of the holding members 20 arranged at intervals in the width direction of the sound insulation panel 10 from above, the sound insulation panel 10 is held by the holding members 20. Therefore, by engaging the sound insulation panel 10 with the recesses 21 of the holding members 20, a sound insulation wall can be easily formed, and the workability at the installation site can be further improved.

[0035] In this case, since the holding member 20 is formed such that the recess 21 has a length that allows a plurality of sound insulation panels 10 to be stacked vertically, a sound insulation wall with an arbitrary height according to the installation site can be formed by the plurality of sound insulation panels 10, and the versatility can be improved.

[0036] Note that the above embodiments are examples of the present invention, and the present invention is not limited to those described in these embodiments.

Description of Signs

[0037] 10…Sound insulation panel, 11…Outer plate-like member, 11a…Vertical surface portion, 11b…Flange portion, 12…Inner plate-like member, 12a…Inclined surface portion, 12b…Joint surface portion, 20…Holding member, 21…Recessed portion.

Claims

1. A soundproof panel comprising a pair of flat outer plate-like members arranged at intervals in the thickness direction, and a corrugated inner plate-like member disposed between the outer plate-like members, wherein the outer plate-like members are joined to the inner plate-like member so as to be held at intervals in the thickness direction by the inner plate-like member, the inner plate-like member includes a plurality of inclined surfaces inclined with respect to the outer plate-like member, and a plurality of flat joining surfaces joined so as to be in surface contact with the outer plate-like member, each inclined surface is provided such that the inclination directions are alternately opposite, and each joining surface is provided between the inclined surfaces respectively. A soundproof panel characterized by the above.

2. each of the outer plate-like members has a vertical surface extending vertically from at least one end toward the other outer plate-like member. The soundproof panel according to claim 1, characterized by the above.

3. each of the outer plate-like members has a flange portion extending perpendicularly to the vertical surface from one end of the vertical surface toward the outside of the outer plate-like member. The soundproof panel according to claim 2, characterized by the above.

4. each of the outer plate-like members is formed in a rectangular shape, and the inner plate-like member is formed such that the inclined surfaces and the joining surfaces are arranged in the short side direction of each outer plate-like member. The soundproof panel according to claim 1, characterized by the above.

5. The distance between the outer plate-like members is 100 mm or more. The soundproof panel according to claim 1, characterized by the above.

6. A soundproof wall structure using the soundproof panel according to any one of claims 1 to 5, comprising a plurality of holding members for holding the soundproof panel such that the thickness direction is horizontal, each holding member has a recess in which the width direction end portion of the soundproof panel engages movably in the vertical direction, and the soundproof panel is held by the holding member by engaging both width direction end portions of the soundproof panel from above in the recesses of the holding members arranged at intervals in the width direction of the soundproof panel. A soundproof wall structure characterized by the above.

7. a plurality of soundproof panels are stacked and arranged in the vertical direction, and the holding member is formed to have a length such that the recess can stack and arrange a plurality of soundproof panels in the vertical direction. The soundproof wall structure according to claim 6, characterized by the above.

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