Sound insulation wall and sound insulation board used therefor

Abstract

To provide a simple front side opening structure for an inspection port that allows inspection work to be performed easily in a sound barrier having such an inspection port with a front side that can be opened and closed.SOLUTION: The upper end of a front cover 18 for opening and closing the front side of an inspection port 17 is attached to a sound insulation plate 1 constituting a body of a sound barrier so as to swing freely. The front side opening of the inspection port 17 can be opened during inspection work by releasing the engagement between a latch 24 of the front cover 18 and a latch receiver 25 of the sound barrier body to swing open the front cover 18. Therefore, the structure of the front side opening of the inspection port 17 can be simplified since there is no necessity to provide a housing or the like for the front cover in the sound barrier body, and the inspection port 17 can be easily opened to inspect the condition of anchor bolts 5 on the back side at the time of inspection.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a soundproof wall that blocks noise generated from a noise source and a sound insulation panel used therefor.

Background Art

[0002] On expressways, generally, in order to suppress the spread of noise generated by the running of vehicles to the surrounding areas, a soundproof wall that blocks the noise is installed. As such a soundproof wall, there are many types in which a plurality of sound insulation panels are provided between columns made of H-shaped steel erected at predetermined intervals on the roadside or median strip of the road. Such a soundproof wall may also be installed to block noise generated from noise sources such as railway vehicles running on a railway line or factories.

[0003] By the way, in the above type of soundproof wall, usually, the lower end of the column is attached to a base plate placed on the upper surface of the foundation by welding or the like, and the base plate is fixed to the foundation with anchor bolts to erect the column.

[0004] When the soundproof wall is provided on the roadside of a bridge or elevated road (viaduct) on a road, when inspecting bolts or the like used in the column attachment part, the load of the inspection work on the front side is small, but the inspection on the back side, which is the outside of the road, has to be carried out using an aerial work vehicle such as an over-fence vehicle, and there is a problem that the work load is large.

[0005] On the other hand, in Patent Document 1 and the like, in order to reduce the load of the inspection work of the soundproof wall, an inspection port that opens to the front side is provided in the sound insulation panel that constitutes the main body part of the soundproof wall (hereinafter referred to as the "soundproof wall main body"), so that bolts or the like used in the column attachment part from the front side to the back side of the soundproof wall can be inspected.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] When an inspection port as described above is provided in a soundproof wall, it is conceivable to close the inspection port with a door or a lid during normal times other than during inspections. However, depending on the way the door or lid is attached, the structure of the opening part of the inspection port including the door or lid may become complicated, or the inspection work may become difficult. For example, in the case of a lid, a storage part may be required, and in the case of sliding the door with respect to the soundproof wall main body, a rail or the like is required. Also, if the lid is bolted to the soundproof wall main body, it will be troublesome to attach and detach the lid during inspection.

[0008] Therefore, an object of the present invention is to provide a soundproof wall capable of opening and closing an inspection port that opens to the front side, and to make the structure of the opening part on the front side of the inspection port simple and easy to perform inspection work.

Means for Solving the Problems

[0009] In order to solve the above problems, the soundproof wall of the present invention adopts a configuration in which a front lid that opens and closes the front side of an inspection port provided on the front side of a soundproof wall main body is swingably attached to the soundproof wall main body.

[0010] According to the above configuration, since the front lid that opens and closes the front side of the inspection port is swingable, it is not necessary to provide a storage part for the front lid or the like in the soundproof wall main body, and the structure of the opening part on the front side of the inspection port can be made simple. Also, by simply swinging the front lid from the front side of the soundproof wall main body, the inspection port can be easily opened to perform inspection work.

[0011] In addition, in the above configuration, it is desirable that fixing means for fixing the front cover to the sound insulation wall main body be provided in a state where the front cover closes the front side of the inspection port. Here, as the fixing means, a configuration including a latch provided on the front cover and a latch receiver provided on the sound insulation wall main body can be adopted. Further, by adopting a configuration in which the front cover can be fixed to the sound insulation wall main body in a state where the front cover swings to the inside of the sound insulation wall main body and opens the front side of the inspection port, the inspection work becomes easier to perform.

[0012] Moreover, if the front cover is configured to contact the peripheral edge of the front side opening of the inspection port from the inside of the sound insulation wall main body when the front side of the inspection port is closed, even if the fixing between the front cover that closes the front side of the inspection port and the sound insulation wall main body becomes loose, there is no risk that the front cover swings to the outside of the sound insulation wall main body, and safety is maintained.

[0013] And the sound insulation panel of the present invention is a sound insulation panel constituting the sound insulation wall having the above configuration, and includes the inspection port and the front cover.

Effects of the Invention

[0014] As described above, the sound insulation wall and the sound insulation panel of the present invention are provided with a front cover that opens and closes the front side of the inspection port in a swingable manner. Therefore, the structure of the opening portion on the front side of the inspection port can be made simple without a lid storage portion or the like, and the inspection port can be easily opened from the front side of the sound insulation wall main body to perform the inspection work.

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] Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 4 show a sound-absorbing panel 1 used for a soundproof wall of the embodiments described later. As shown in FIGS. 1, 2(a), and 2(b), this sound-absorbing panel 1 is generally horizontally long rectangular and constitutes a soundproof wall body. It includes a front panel 11 forming the front surface, a back panel 12 forming the back surface, side panels 13 forming both left and right side surfaces, a bottom panel 14 forming the bottom surface, and a thick plate-shaped sound-absorbing material 15 housed in the space surrounded by the front panel 11, the back panel 12, the side panels 13 on both sides, and the bottom panel 14. The front panel 11 is formed of an aluminum alloy plate, the back panel 12 is formed of a plated steel plate or a laminated steel plate, the side panels 13 and the bottom panel 14 are formed of plated steel plates respectively, and the sound-absorbing material 15 is formed of polyester fiber. Note that the sound-absorbing material may be formed of glass wool. And at the lower parts on both sides of this sound-absorbing panel 1, an inspection port 17 is formed which opens to the front side and has a part of the back panel 12 as a back wall part, and a front cover 18 for opening and closing a substantially rectangular opening on the front side of the inspection port 17 is provided.

[0017] The front panel 11 has a large number of sound-absorbing holes formed in a louver shape in the front part 11a other than the front side opening of the inspection port 17, and has an upper plate part 11b bent to the back side at the upper end.

[0018] The back panel 12 has an upper part of the back surface portion 12a extending parallel to the front surface portion 11a of the front panel 11, and a concave portion 12b extending in the longitudinal direction of the sound insulation panel 1 is provided at the central portion. This concave portion 12b is for improving the cross-sectional strength as a whole. And at the lower part of the back surface portion 12a, an inclined surface portion that bulges linearly obliquely downward from the lower end of the concave portion 12b and a portion that extends parallel to the front surface portion 11a of the front panel 11 from the lower end of the inclined surface portion are formed. Also, at the upper end of the back panel 12, an upper plate portion 12c that is bent toward the front side and is connected by a rivet (not shown) in a state of overlapping the upper plate portion 11b of the front panel 11 is provided, and L-shaped notches 12d are provided at both corners on the lower end side.

[0019] Although not shown in the figure, the side panel 13 is composed of a member that forms a rectangular portion extending vertically on the side surface of the sound insulation panel 1 and a member that forms a trapezoidal portion that spreads along the bulge of the back panel 12 toward the back side, and is connected to the front panel 11 by rivets and to the back panel 12 by rivets or spot welding.

[0020] The bottom panel 14 is inclined slightly downward from the back side toward the front side, and the front side portion is connected to the inwardly bent portion at the lower end of the front panel 11, and the downwardly bent portion on the back side is connected to the back surface portion 12a of the back panel 12 respectively. Also, on the lower surface of the bottom panel 14, a support member 19 having a substantially U-shaped cross section is attached in a posture with the opening facing downward over the entire length of the portion other than both side portions. The support member 19 has both leg portions extending to the same position as the lower end of the back panel 12 to support the front side portion of the bottom panel 14, and the leg portion on the front side forms the lower end portion of the front surface of the sound insulation panel 1. On the other hand, on both side portions of the lower surface of the bottom panel 14, gap members 20 having a substantially U-shaped cross section smaller than the support member 19 are attached in a posture with the opening facing downward. The gap members 20 are for closing the gaps generated on the lower end sides of both side portions of the sound insulation panel 1 when the sound insulation panel 1 is installed as described later.

[0021] And among the spaces surrounded by the front panel 11, the back panel 12, the side panel 13, and the bottom panel 14 that are connected to each other and integrated, a sound-absorbing material 15 is stored in the portion other than the inspection port 17.

[0022] The inspection port 17 uses a part of the bulging portion of the back surface portion 12a of the back plate 12 as the back wall portion, a part of the bottom plate 14 as the bottom wall portion, and a part of the lower portion of the side plate 13 as the outer side wall portion, and has a partition plate 17a serving as the inner side wall portion. Further, in the bottom wall portion (both side portions of the bottom plate 14), a rectangular bottom surface opening 17b is formed in the back surface side portion thereof, and a bottom surface lid 21 for opening and closing the bottom surface opening 17b is provided. The bottom surface lid 21 is made of rubber, and a protrusion 21a that engages with the peripheral edge of the bottom surface opening 17b is formed on the lower surface side, and it can be attached to and detached from the bottom wall portion only by passing the bottom surface opening 17b while elastically deforming the protrusion 21a.

[0023] And above the inspection port 17, a receiving member 22 having a substantially U-shaped cross section for supporting the sound-absorbing material 15 is provided. The receiving member 22 has its opening facing upward, and its bottom portion is inclined slightly downward from the back side toward the front side, and both side portions are attached to the partition plate 17a of the inspection port 17 and the side plate 13.

[0024] As shown in FIG. 3, the front lid 18 is a substantially flat U-shaped member having substantially the same shape and dimensions as the front side opening of the inspection port 17 in a front view. It is arranged inside the sound insulation wall body of the sound insulation board 1, and is swingably attached to the lower surface of the receiving member 22 via a hinge 23 at the central position in the width direction on the upper end side. This front lid 18 is made of aluminum, and its thickness dimension is equal to or greater than that of the front plate 11, but its material is not particularly limited. Further, since the hinge 23 is provided inside the sound insulation board 1, it is difficult for foreign objects to get caught, and it is also less affected by rainwater.

[0025] In addition, a latch 24 is provided at the center position in the width direction on the lower end side of the front cover 18, and a latch receiver 25 is provided on the inner surface of the lower edge portion of the inspection port 17. The latch 24 is of a type in which a pin 24b that can be protruded and retracted is manually inserted into and removed from a case 24a fixed to the front cover 18. The pin 24b has a knob 24c that penetrates the front surface of the case 24a and the front cover 18 and protrudes to the front side of the sound insulation panel 1, and is pressed from both sides by a spring (not shown) inside the case 24a, and has a structure that does not move easily by an external force other than operating the knob 24c.

[0026] When the front cover 18 closes the opening on the front side of the inspection port 17, by operating the knob 24c of the latch 24 from the front side of the sound insulation panel 1 to protrude the pin 24b downward from the case 24a and engaging it with the latch receiver 25, the front cover 18 can be fixed to the sound insulation wall main body of the sound insulation panel 1. That is, the latch 24 and the latch receiver 25 constitute a fixing means for fixing the front cover 18 to the sound insulation wall main body. Further, when the front cover 18 closes the front side opening of the inspection port 17, the four corners of its periphery come into contact with the four corners of the periphery of the front side opening of the inspection port 17 from the inside of the sound insulation wall main body (see FIG. 3).

[0027] On the other hand, when opening the front side opening of the inspection port 17, the front cover 18 may be swung inward of the sound insulation wall main body in a state where the pin 24b is retracted into the case 24a by operating the knob 24c of the latch 24 to release the engagement with the latch receiver 25. At this time, as shown in FIG. 4, after swinging the front cover 18 to a substantially horizontal state, if the pin 24b of the latch 24 is protruded, the pin 24b is locked by a U-shaped receiving fitting 26 attached to the back surface portion 12a of the back plate 12, so that the front cover 18 is restricted from swinging to the front side of the inspection port 17 and is fixed to the sound insulation wall main body in a state where the front side opening of the inspection port 17 is open.

[0028] FIGS. 5 and 6 show the main part of the sound insulation wall of the embodiment using the sound insulation panel 1 having the above-described configuration. In this sound insulation wall, columns 3 are erected on the upper surface of the foundation 2 at predetermined intervals, and a plurality of sound insulation panels 1, 1' are provided between the columns 3.

[0029] The said support column 3 is made of H-shaped steel, and a base plate 4 placed on the upper surface of the foundation 2 is attached to the lower end part by welding. And it is fixed on the foundation 2 together with the base plate 4 by anchor bolts 5 embedded in the foundation 2 through the base plate 4.

[0030] On the upper surface of the said base plate 4, transverse ribs 4a extending in the longitudinal direction of the sound insulation board 1 (hereinafter also referred to as "left and right") and longitudinal ribs 4b extending in the thickness direction of the sound insulation board 1 (hereinafter also referred to as "front and back") are provided in pairs, one pair arranged in the front and back for each, and provided one pair by one pair from left to right. And the lower end part of the web 3a of the support column (H-shaped steel) 3 is arranged in the gap between the left and right transverse ribs 4a, and the lower end part of the flange 3b of the support column 3 is sandwiched between the left and right longitudinal ribs 4b, and the support column 3 and the base plate 4 are integrated. Also, the anchor bolts 5 for fixing the base plate 4 to the foundation 2 are arranged on the front side and the back side with each pair of transverse ribs 4a sandwiched therebetween.

[0031] The said sound insulation boards 1, 1' are arranged such that the sound insulation board 1 shown in FIGS. 1 to 4 is arranged at the lowermost stage between the support columns 3, and a plurality of conventional sound insulation boards 1' are stacked thereon. The conventional sound insulation board 1' is the base of the sound insulation board 1 of the embodiment arranged at the lowermost stage, and inspection openings and front covers like those of the sound insulation board 1 are not provided, and there is no bulging part at the lower part of the back plate, and a sound absorption material of the same material as the sound insulation board 1 is stored therein as a whole.

[0032] Here, both side parts of each of the sound insulation boards 1, 1' are fitted into the U-shaped cross-sections of the support columns 3 on both sides. Among them, for the lowermost sound insulation board 1, the lower ends of both leg parts of the support member 19 and the lower end of the part without the notch 12d of the back plate 12 are in contact with the upper surface of the foundation 2 between the base plates 4 on both sides, and a corner part on the back side of the base plate 4 is fitted into the notch 12d of the back plate 12.

[0033] At this time, the gap members 20 provided at the lower ends of both sides of the sound insulation panel 1 are respectively configured to enter between a pair of horizontal ribs 4a of the base plate 4. Further, the bottom surface opening 17b of the inspection port 17 of the sound insulation panel 1 opens above the anchor bolts 5 arranged on the back side of the pair of horizontal ribs 4a and is closed by the bottom surface lid 21. And the front side opening of the inspection port 17 is closed by the front lid 18.

[0034] This sound insulation wall has the above configuration. During the inspection work, as described above, the engagement between the latch 24 and the latch receiver 25 of the front lid 18 of the sound insulation panel 1 is released, the front lid 18 is swung and fixed in a state where the front side opening of the inspection port 17 is opened, and then the bottom surface lid 21 is removed from the bottom wall portion of the inspection port 17 to open the bottom surface opening 17b, so that not only the anchor bolts 5 on the front side but also the state of the anchor bolts 5 on the back side can be easily inspected from the front side (see Fig. 7).

[0035] On the other hand, during normal times other than inspection times, by fixing the front lid 18 in a state where the front side of the inspection port 17 is closed, it is possible to prevent the intrusion of dust, birds, snow, etc. into the inspection port 17.

[0036] In addition, since the front lid 18 is swingably provided on the sound insulation wall main body of the sound insulation panel 1, it is not necessary to provide a housing portion for the front lid or the like on the sound insulation wall main body, and the structure of the opening portion on the front side of the inspection port 17 is simple.

[0037] Moreover, since the front lid 18 is configured to contact the peripheral edge of the front side opening of the inspection port 17 from the inside of the sound insulation wall main body when the front side of the inspection port 17 is closed, even if the engagement between the latch 24 of the front lid 18 and the latch receiver 25 of the sound insulation wall main body is accidentally released, there is no risk of the front lid 18 swinging to the outside of the sound insulation wall main body, and safety is ensured. The fact that the front lid 18 is attached by the hinge 23 so as to swing to the inside of the sound insulation wall main body, and the fact that the front lid 18 is designed so that a handle is not required and the protrusion to the front side is minimized also contribute to ensuring safety.

[0038] The embodiments disclosed herein should be considered illustrative in all respects and not restrictive. The scope of the present invention is defined not by the above description but by the claims, and it is intended to include all modifications within the meaning and scope equivalent to the claims.

[0039] For example, the bottom cover that closes the bottom opening of the inspection port so as to be openable and closable can be omitted, and the fixing means for fixing the front cover to the sound insulation wall body is not limited to the latch and latch receiver as in the embodiment, and other appropriate means can also be used.

[0040] In addition to the sound insulation board incorporating a sound absorption material and the sound insulation wall using the same as in the embodiment, the present invention can also be applied to a sound insulation board without a sound absorption material, such as a light-transmitting board or a concealment board, and a sound insulation wall using the same.

Explanation of Reference Numerals

[0041] 1, 1' Sound insulation board 2 Foundation 3 Support column 4 Base plate 5 Anchor bolt 11 Front panel 12 Rear panel 13 Side panel 14 Bottom panel 15 Sound absorption material 17 Inspection port 18 Front cover 21 Bottom cover 22 Receiving member 23 Hinge 24 Latch 25 Latch receiver 26 Receiving fitting

Claims

1. In a sound insulation wall provided with an inspection opening that opens to the front side of the sound insulation wall body, a front cover that opens and closes the front side of the inspection opening is swingably attached to the sound insulation wall body, The sound insulation wall is characterized in that the front cover can be fixed to the sound insulation wall body in a state where the front cover swings inward of the sound insulation wall body to open the front side of the inspection opening.

2. The sound insulation wall according to claim 1, characterized in that fixing means for fixing the front cover to the sound insulation wall body is provided in a state where the front cover closes the front side of the inspection opening.

3. The sound insulation wall according to claim 2, characterized in that the fixing means comprises a latch provided on the front cover and a latch receiver provided on the sound insulation wall body.

4. The sound insulation wall according to any one of claims 1 to 3, characterized in that when the front cover closes the front side of the inspection opening, the front cover comes into contact with the peripheral edge of the front side opening of the inspection opening from the inside of the sound insulation wall body.

5. A sound insulation panel constituting the sound insulation wall according to any one of claims 1 to 4, the sound insulation panel comprising the inspection opening and the front cover.

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