JP6201194B2 - Sound absorber for road - Google Patents

Description

  The present invention relates to an improvement in durability of a sound absorbing plate for roads, which is a constituent member of a sound absorbing wall that is installed along a road and blocks vehicle running noise and the like.

  In order to prevent road noise generated by the traveling of a vehicle from reaching a private house (private land) such as a nearby private house, a sound absorbing wall is installed beside the road. This sound-absorbing wall is formed by installing road sound-absorbing plates provided with sound-absorbing materials in a metal box in a substantially vertical direction between columns, and the front surface of the road sound-absorbing plate ( On the road side surface), openings (louvers, holes, etc.) for taking in noise are formed inside the road sound-absorbing plate.

  As shown in FIGS. 5A and 5B, which is a schematic diagram for explaining the configuration of a conventional road sound absorbing plate 350, a general road sound absorbing plate faces the road side where noise is generated and is opened. 8 is configured by combining a front plate 310 having 8, a rear plate 12 facing a private area on the opposite side of the road, and a side plate 314 covering a side surface of a space formed by the front plate and the rear plate in a box shape. The The sound absorbing material 9 is built into the box-shaped road sound absorbing plate 350, and noise that has entered the sound absorbing plate 350 from the opening 8 of the front plate 310 is absorbed by the sound absorbing material 9.

  The front plate 310 and the back plate 12 constituting the general road sound absorbing plate 350 are formed by bending an aluminum alloy plate, a galvanized steel plate or the like into a substantially U-shape. As shown in FIG. 5 (b), which is an enlarged schematic view of the region G shown in FIG. 5 (a), the front plate 310 has a folded portion 310a folded in the direction toward the private side at the lower part on the side facing the road. Is formed. Further, the back plate 12 is formed with a lip portion 12a extending substantially vertically downward at the lower portion facing the road.

  As shown in FIG. 5B, the front plate 310 and the back plate 12 are assembled by first inserting and connecting the folded portion 310a at the bottom of the front plate 310 to the lip portion 12a at the bottom of the back plate. As shown in FIG. 5 (a), the upper part of the front plate 310 and the rear plate 12 is joined with a joining member such as a rivet 5 at an appropriate interval in the longitudinal direction.

  Further, the openings on both side surfaces of the box shape formed by the front plate 310 and the back plate 12 are closed by side plates 314 joined to the both ends of the back plate 12 by spot welding or the like in advance.

  The assembly procedure of a general road sound-absorbing plate 350 will be described in detail with reference to FIG. 5. First, the side plates 14 are joined to both ends of the back plate 12 by spot welding or the like. Next, the sound absorbing material 9 is installed inside from a box-shaped opening formed by the back plate 12 and the side plate 14.

  Subsequently, as described above, the folded portion 310a below the front plate 310 is inserted and connected to the lip portion 12a below the back plate 12. Next, the top plate portion 310t of the front plate 310 and the top plate portion 12t of the back plate 12 are overlapped and joined by a joining member such as the rivet 5 to form the road sound absorbing plate 350.

  In recent years, rainwater or water containing salt freezing agent made from calcium chloride or the like (salt water) is blown from the opening of the front plate of the sound absorbing plate for roads and stays inside to corrode the bottom of the front plate or the back plate. The problem has occurred. In the conventional sound absorbing board for roads, rainwater or the like tends to stay on the folded portion that is formed in the lower portion of the front plate and carries the lower portion of the rear plate and the private-side bottom surface of the rear plate.

  If the sound absorbing plate for roads corrodes due to accumulated rainwater, etc., the appearance will be damaged due to the occurrence of corrosion such as rust, eventually the corroded part will break, and the strength of the sound absorbing plate for roads will decrease. Arise.

  Patent Document 1 discloses an attachment structure in which a folded portion of the front plate described above is eliminated and a front plate and a back plate are joined by a rivet in a road sound absorbing plate.

  However, in the sound absorbing board for roads according to the mounting structure of Patent Document 1, it is prevented that rainwater or the like stays in the folded portion of the front board and the front board is corroded, The problem remains that the accumulated rainwater cannot be discharged.

  Moreover, since it is not the structure which inserts and connects the lower part of a front board and the lower part of a back board as mentioned above, the problem that the assembly process of the sound-absorbing board for roads will become complicated. Further, since the rivet is exposed on the road side, there arises a problem that the appearance is impaired.

  Further, Patent Document 2 discloses a configuration of a road sound absorbing plate that suppresses rainwater and the like from staying in the folded portion of the front plate. Specifically, a structure of a sound absorbing board for roads is disclosed in which drainage windows and vent holes are formed in the folded portion of the front plate to improve the drainage of rainwater and the like flowing into the folded portion and promote drying.

  However, in the road sound-absorbing plate having the configuration of Patent Document 2, since the drainage window (opening) is formed in the folded portion of the front plate, there arises a problem that the strength of the folded portion is lowered.

  Further, as in Patent Document 1, it is possible to prevent rainwater or the like from staying in the folded portion of the front plate and corroding the front plate, but it is not possible to discharge the rainwater or the like remaining on the private side bottom surface of the back plate. The problem remains.

Registered Utility Model No. 3167392

JP 2013-227838 A

  The present invention was created in view of the above-mentioned problems, and prevents the corrosion by quickly discharging rainwater or the like blown into the sound absorbing plate from the opening of the front plate of the sound absorbing plate for roads. The object is to provide a sound absorbing board for roads that can improve durability with high drainage capacity while maintaining it.

  The road sound-absorbing plate of the present invention provided to solve the above-described problems includes an opening in the front plate and a sound-absorbing material inside. In the front surface of the sound absorbing plate for roads, there is a recess extending in the longitudinal direction of the sound absorbing plate, and at the upper surface of the recessed portion and / or the corner of the upper surface of the recessed portion and the front plate of the sound absorbing plate, A drain outlet is provided for communicating the inside and the outside of the road sound absorbing plate.

  Although details will be described later, with the above-described configuration, at least one of the upper surface of the concave portion or the corner portion of the upper surface of the concave portion and the front plate of the sound absorbing plate is provided with a drain outlet. Accordingly, it is possible to quickly discharge rainwater or the like blown into the sound absorbing plate from the opening of the front plate of the road sound absorbing plate to the outside of the sound absorbing plate before reaching the bottom surface of the sound absorbing plate.

Furthermore, road sound absorption plate of the present invention provided to solve the above problems, the recess has an upper inclined surface inclined toward the upper side of the recess to the back above the road sound absorption plate.

  Although the details will be described later, by adopting the above-described configuration, it is possible to guide rainwater or the like blown into the interior of the sound absorbing board for the road from the opening of the front plate to the drain outlet by the upper inclined surface, and to discharge more quickly. Become.

Moreover, the road sound-absorbing plate of the present invention provided to solve the above-described problems includes an opening in the front plate and a sound-absorbing material inside. In the front surface of the sound absorbing plate for roads, there is a recess extending in the longitudinal direction of the sound absorbing plate, and at the upper surface of the recessed portion and / or the corner of the upper surface of the recessed portion and the front plate of the sound absorbing plate, A drain outlet is provided for communicating the inside and the outside of the road sound absorbing plate. Furthermore, the recess has a lower inclined surface inclined toward the lower side of the recess to the back above the road sound absorption plate.

  As will be described in detail later, with the above configuration, rainwater discharged from the drain port formed in the upper inclined surface can be quickly discharged out of the recess by the lower inclined surface. It is possible to prevent rainwater or the like from staying in the wall and corroding the lower surface of the recess.

Moreover, the road sound-absorbing plate of the present invention provided to solve the above-described problems includes an opening in the front plate and a sound-absorbing material inside. In the front surface of the sound absorbing plate for roads, there is a recess extending in the longitudinal direction of the sound absorbing plate, and at the upper surface of the recessed portion and / or the corner of the upper surface of the recessed portion and the front plate of the sound absorbing plate, A drain outlet is provided for communicating the inside and the outside of the road sound absorbing plate. Furthermore, the sound absorbing material support portion is connected to the concave portion .

  Although the details will be described later, by adopting the above-described configuration, the lower part of the sound absorbing material built in the road sound absorbing plate is securely supported by the sound absorbing material supporting portion, and the inside of the road sound absorbing plate from the opening of the front plate. It is possible to further suppress the rainwater or the like blown into the bottom of the sound absorbing plate.

  According to the sound absorbing plate for roads of the present invention, it is possible to quickly discharge rainwater or the like blown into the sound absorbing plate from the opening of the front plate.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which shows the sound-absorbing board for roads based on 1st embodiment of this invention, (a) is the schematic diagram of the external appearance which looked at the sound-absorbing board for roads from the roadway side, (b) is FIG. 2A is a schematic cross-sectional view of the sound absorbing plate for road shown in FIG. 1A as viewed from the direction of arrow B, FIG. 1C is a rear plate in FIG. 1B, and FIG. (E) is a front plate in FIG. 1 (b), and (f) is an enlarged schematic view of a region C shown in FIG. 1 (e). It is the schematic which shows the sound-absorbing board for roads concerning 2nd embodiment of this invention, (a) is the schematic diagram which looked at the sound-absorbing board for roads from the roadway side, (b) is FIG. 2 (a). It is the schematic sectional drawing which looked at the DD cross section of the sound-absorbing board for roads shown from the direction of arrow E, (c) is the enlarged schematic diagram of the area | region F shown in FIG.2 (b). It is an expanded schematic diagram which shows the principal part of the sound-absorbing board for roads concerning 3rd embodiment of this invention. It is the schematic which shows the modification of the cross-sectional shape of the recessed part of the sound-absorbing board for roads based on embodiment of this invention. It is the schematic for demonstrating the structure of the conventional sound-absorbing board for roads, (a) is a schematic side view of the conventional sound-absorbing board for roads, (b) is the enlarged schematic view of the area | region G shown to Fig.5 (a). is there.

Hereinafter, a road sound absorbing plate 50 according to an embodiment of the present invention (hereinafter, also simply referred to as “sound absorbing plate”) will be described in detail with reference to the drawings.
1 to 5, the numbers having the same last two digits indicate parts of the same type.

<< Configuration of Sound Absorbing Board for Road of the Present Invention >>
The configuration of the sound absorbing plate 50 will be described with reference to FIG. 1 which is a schematic diagram showing the road sound absorbing plate 50 according to the first embodiment of the present invention. As shown in FIG. 1 (b), which is a schematic sectional view of the AA cross section of the road sound absorbing plate 50 shown in FIG. 1 (a) seen from the direction of arrow B, the sound absorbing plate 50 is made of an aluminum plate or a galvanized plate. It is a box-shaped member formed of a metal plate such as a steel plate, and has a plate-like sound absorbing material 9 mainly composed of glass wool, rock wool, polyester fiber sound absorbing material or the like, and having a water repellent sheet attached to the surface thereof. Arranged.

  The sound absorbing material 9 is supported on the road side surface by a front plate 10 described later, the private side surface is supported by a bent portion formed in the longitudinal direction of the sound absorbing plate 50 on a rear plate 12 described later, and the lower surface is It is supported by the upper surface of the recess 18 (218 shown in FIG. 3) or a sound absorbing material support 22 described later.

  The sound absorbing plate 50 includes a front plate 10 having a top plate portion 10t shown in a schematic cross-sectional view in FIG. 1 (e), and a top plate portion 12t and a bottom plate portion 12b shown in a schematic cross-sectional view in FIG. 1 (c). The sound-absorbing material 9 is disposed in a box-shaped interior formed by the back plate 12 having the side plate 14 and the side plate 14 schematically shown in FIG.

  Further, the front plate 10 is an enlarged schematic view of a plurality of openings 8 shown in FIGS. 1A to 1B and FIGS. 1E to 1F and a region C shown in FIG. 1 (f), and a guide portion 18a extending from the periphery of the drain port 20 toward the inside of the sound absorbing plate 50 is provided. The opening 8 is formed by a slit-shaped louver or a circular hole. The opening 8 is not limited to these shapes, and it is sufficient that sound can be introduced into the sound absorbing plate 50.

  1 to 3 and FIG. 5, only a part of the opening 8 is provided with a reference numeral, but a plurality of openings 8 are provided on the road side surface of the front plate 10. Moreover, as shown in FIG.1 (b), the slit 15 for draining is arrange | positioned between the backplate 12 and the side plate (not shown) shown in FIG.1 (d).

  As for the procedure for assembling the sound absorbing plate 50, first, the side plate 14 schematically shown in FIG. 1D is joined to both ends of the back plate 12 schematically shown in FIG. 1C by spot welding or the like. Next, the sound absorbing material 9 is installed on the sound absorbing plate support portion 22 of the front plate 10.

  Subsequently, the folded portion 10a at the lower portion of the front plate 10 where the sound absorbing material 9 is installed is inserted and connected to the lip portion 12a at the lower portion of the rear plate 12. Next, the top plate portion 10t of the front plate 10 and the top plate portion 12t of the back plate 12 are overlapped. Finally, the front plate 10 and the back plate 12 are over the rivets 5 shown in FIG. The sound absorbing board 50 for roads is comprised by joining with joining members, such as.

  The sound absorbing plate 50 is installed between columns (not shown) erected on the side of the road at predetermined intervals so as to be stacked in a substantially vertical direction so that the front plate 10 faces the road side. Not shown).

<< Configuration of First Embodiment >>
The configuration of the road sound absorbing plate 50 according to the first embodiment of the present invention will be described in detail with reference to FIG. 1 which is a schematic diagram showing the road sound absorbing plate 50 according to the first embodiment of the present invention. As shown in FIGS. 1A to 1B and FIGS. 1E to 1F, the sound absorbing plate 50 has a concave portion 18 extending in the longitudinal direction of the sound absorbing plate 50 on the front surface of the sound absorbing plate 50. . Moreover, as shown in FIG.1 (f), the drain port 20 which connects the inside of the sound-absorbing board 50 and the exterior is provided in the upper surface of the recessed part 18. As shown in FIG.

  The recessed portion 18 is preferably disposed at a position above the folded portion 10 a formed at the lower portion of the front plate 10 and below the lowermost opening 8 in the installed state of the sound absorbing plate 50.

  Due to the above, as shown in FIG. 1 (f), the rain water and the like on the road surface rolled up by the travel of the vehicle (not shown) blown into the sound absorbing plate 50 from the opening 8 of the front plate 10 constituting the sound absorbing plate 50. Even in a case or the like, before reaching the bottom surface of the sound absorbing plate 50, it is possible to quickly discharge to the outside.

  Accordingly, rainwater or the like stays on the folded side 10a at the lower part of the front plate 10 or the private side bottom surface of the back plate (not shown) (noted as 12 in FIG. 1B), and the sound absorbing plate 50 for the road is constituted by corrosion or the like. It is possible to prevent the strength of the front plate 10 and the back plate 12 from being reduced, or the appearance of the front plate 10 from being damaged due to discoloration due to corrosion.

  Moreover, as shown in FIG.1 (f), the recessed part 18 has the upper side inclined surface 18a which inclines toward the back (private side) upper side of the sound-absorbing board 50 for roads from the upper side, and the drain port 20 is an upper side. It is preferably formed on the road side of the inclined surface 18a.

  By forming the upper inclined surface 18a, rainwater or the like that has blown into the sound absorbing plate 50 from the opening 8 of the front plate 10 and dropped onto the upper surface of the upper inclined surface 18a is directed to the drain port 20 by the inclination of the upper inclined surface 18a. As a result, the rainwater and the like can be discharged to the outside of the sound absorbing plate 50 more quickly.

  Further, as shown in FIG. 1 (f), the recess 18 preferably has a lower inclined surface 18 b that is inclined from the lower side thereof toward the rear surface (private side) of the road sound absorbing plate 50.

  By forming the lower inclined surface 18b, rainwater or the like discharged from the drain 20 formed in the upper inclined surface 18a falls on the upper surface of the lower inclined surface 18b and passes through the lower inclined surface 18b. It is quickly discharged to the front surface (road side) of the sound absorbing plate 50.

  By the above, it is prevented that rainwater etc. remain in the recessed part 18, and corrosion of the lower surface etc. of the recessed part 18 can be prevented. Further, it is also possible to prevent rainwater or the like from staying in the folded portion 10a constituting the insertion connecting portion and causing corrosion.

  Moreover, in the sound absorbing board 50 for roads of 1st embodiment of this invention, as shown to FIG.1 (b) and (e)-(f), the sound-absorbing material support part 22 is the upper side inclined surface of the recessed part 18. As shown in FIG. 18a is connected. As an example, the sound absorbing material support portion 22 is formed by bending a sheet metal material into a substantially L shape, and is joined to the upper surface of the upper inclined surface 18a in the longitudinal direction of the sound absorbing plate 50 by a joining member such as a rivet 5. It is.

  As shown in FIG. 1 (f), the private-side surface of the sound-absorbing material support portion 22 is formed so as to face substantially vertically upward when the sound-absorbing plate 50 is installed. As a result, the sound absorbing material supporting portion 22 can receive and support the lower part of the sound absorbing material 9 on the private side.

  In the road sound-absorbing plate 50 according to the first embodiment of the present invention, as shown in FIG. 1 (f), rainwater that has blown into the sound-absorbing plate 350 from the opening 8 and has fallen along the road side surface of the sound-absorbing material 9. And the like are received by the sound absorbing material support portion 22 and guided to the drain 20 formed on the road side of the upper inclined surface 18a of the recess 18 so as to be reliably discharged to the outside of the sound absorbing plate 50.

  The sound absorbing material support portion 22 may be disposed across the entire length in the longitudinal direction of the sound absorbing plate 50 between both ends of the sound absorbing plate 50, or the sound absorbing material 9 may be stably supported with an appropriate length. You may divide | segment and arrange | position suitably at the position which can be performed.

  According to the road sound-absorbing plate 50 according to the first embodiment of the present invention described above, the rainwater or the like blown into the sound-absorbing plate 50 from the opening 8 of the front plate 10 is transferred to the front plate 10 and the back plate 12. Is quickly discharged before reaching the private-side bottom surface of the back plate 12 to prevent corrosion of members constituting the road sound absorbing plate 50, and to improve the appearance of the road sound absorbing plate 50. Strength and durability can be improved while maintaining.

<< Configuration of Second Embodiment >>
With reference to FIG. 2, which is a schematic diagram showing a road sound-absorbing plate 150 according to the second embodiment of the present invention, the configuration of the road sound-absorbing plate 150 according to the second embodiment of the present invention is mainly the first. Different parts from the embodiment will be described in detail. As shown in FIGS. 2A to 2C, the sound absorbing plate 150 has a concave portion 118 extending in the longitudinal direction of the sound absorbing plate 150 on the front surface of the sound absorbing plate 150. In addition, as shown in FIG. 2C, a drainage port 120 is provided on the upper surface of the recess 118 to allow the inside of the sound absorbing plate 150 to communicate with the outside.

  In the first embodiment, as shown in FIG. 1 (f), the recess 18 is formed by bending the front plate 10, but in the second embodiment, the recess 118 is composed of a plurality of members.

  More specifically, FIG. 2B is a schematic cross-sectional view of the sound absorbing plate 150 for road shown in FIG. 2A viewed from the direction of the arrow E, and FIG. As shown in FIG. 2C, which is an enlarged schematic view of FIG. 2, the front plate upper member 110 has its lower end bent toward the private side, and the concave upper surface portion 24 and the sound absorbing material support portion 122 are integrally formed. . Further, on the road side below the front plate upper member 110, a drainage port 120 is formed to communicate the interior of the sound absorbing plate 150 with the outside.

  The surface on the private side of the sound-absorbing material support part 122 is formed so as to face substantially vertically upward when the sound-absorbing plate 150 is installed, as shown in FIG.

  Further, the front plate lower member 30 is folded in a U shape so that the lower end of the front plate lower member 30 faces substantially vertically upward in the installed state of the sound absorbing plate 150 to form a folded portion 30a. In addition, the upper portion of the front plate lower member 30 is formed in a two-step staircase shape so as to integrally form the concave lower surface portion 30b and the joint portion 30c.

  In the sound absorbing plate 150 of the second embodiment, a joining portion 30c formed on the upper portion of the front plate lower member 30 and a concave upper surface portion 24 of the front plate upper member 110 are joined in a longitudinal direction by a joining member such as a rivet 5. After the front plate is formed by joining at an appropriate interval, the general conventional sound absorbing plate for roads 350 shown in FIG. 4 and the road sound absorbing plate 50 of the first embodiment as described above are used. It is assembled in the same procedure.

  In the road sound absorbing plate 50 of the first embodiment described above, the recess 18 is formed by bending the lower portion of the front plate 10 as shown in FIG. According to the road sound-absorbing plate 150 according to the second embodiment of the present invention described above, the recess 118 is formed by two members, the front plate upper member 110 and the front plate lower member 30.

  With the above, it is possible to increase the degree of freedom in designing the arrangement position and shape of the drainage port 120 while improving the drainage capacity of the road sound absorbing plate 150.

  More specifically, in the second embodiment, rainwater or the like blown into the interior of the road sound absorbing plate 150 from the opening 8 of the front plate upper member 110 and the folded portion 30 a formed at the lower portion of the front plate lower member 30 Before reaching the insertion connecting portion with the back plate 12 or the private side bottom surface portion of the back plate 12, it can be quickly discharged from the drainage port 120 formed on the road side below the front plate upper member 110. it can. Thereby, corrosion of the members constituting the sound absorbing plate 150 can be prevented, and the strength and durability can be improved while maintaining the appearance of the sound absorbing plate 150.

  At the same time, since the concave portion 118 is formed by combining two members, the degree of freedom in designing the cross-sectional shape of the concave portion 118 and the like increases. As a result, the degree of freedom in designing the arrangement position of the drain port 120 in the depth direction (substantially left and right direction in FIG. 2C), the shape of the drain port 120, the shape of the recess 118, and the like can be increased.

<< Configuration of Third Embodiment >>
With reference to FIG. 3, which is a schematic diagram showing the main part of a road sound absorbing plate 250 according to the third embodiment of the present invention, the configuration of the road sound absorbing plate 250 according to the third embodiment of the present invention is mainly described. The parts different from the first embodiment will be described in detail.

  As shown in FIG. 3, in the road sound-absorbing plate 250, the lower portion of the front plate 210 constituting the sound-absorbing plate 250 is bent into a generally U shape so as to form a concave portion 218. An upper inclined surface 218a and a lower inclined surface 218b are formed, and a folded portion 210a is integrally formed in a substantially vertical downward direction from the lower side of the lower inclined surface 218b. Further, a drain port 220 is formed on the road side of the upper inclined surface 218a.

  In the present embodiment, the sound absorbing material 9 is supported at the lower surface thereof by the upper surface on the private side of the upper inclined surface 218 a that constitutes the recess 218. In addition, the other surfaces of the sound absorbing material 9 are supported by the front plate 210 on the road side surface and the private side surface on the back plate 12 and the sound absorbing plate 250 as in the first and second embodiments. Are supported by bent portions (not shown) formed in the longitudinal direction (shown in FIGS. 1B and 2B), and both end surfaces are supported by side plates 14.

  As described above, the sound absorbing material support portions 22 (shown in FIG. 1 (f)) and 122 (shown in FIG. 2 (c)) provided in the first embodiment and the second embodiment described above are private areas. The sound-absorbing material 9 can be supported by the private-side upper surface of the upper inclined surface 218a constituting the recess 218 without providing a surface formed so as to face substantially vertically upward. In this case, rainwater or the like that has fallen along the road side surface of the sound absorbing material 9 is received by the upper inclined surface 218a that constitutes the recess 218, and is guided to the drain outlet 220 by the inclination, so Discharged.

  According to the road sound absorbing plate 250 according to the third embodiment of the present invention described above, the number of parts and the joining by a joining member such as the rivet 5 are compared with the first embodiment and the second embodiment. By reducing the number of parts, manufacturing costs and assembly man-hours can be reduced.

  At the same time, rainwater or the like blown into the sound absorbing plate 250 from the opening 8 of the front plate 210 is inserted into the back connection portion 210a formed on the front plate 210 and the lip portion 12a formed on the back plate 12 or the back. Before reaching the private side bottom surface of the face plate, it can be quickly discharged from the drainage port 120 formed on the road side of the upper inclined surface 218a formed integrally with the front plate 210.

  Therefore, it is possible to improve the strength and durability while maintaining the appearance of the sound absorbing plate 250 while preventing the corrosion of the members constituting the sound absorbing plate 250 while reducing the manufacturing cost and assembly man-hour of the road sound absorbing plate 250. Become.

  In the first to third embodiments described above, the longitudinal dimension of the recess 18 (118, 218) is at least for sound absorption as shown in FIGS. 1 (a) and 2 (a). It is preferably set so as to be opposed to all the portions where the openings 8 are arranged. Thereby, rainwater or the like blown into the sound absorbing plate 50 (150, 250) from the opening 8 can be reliably discharged from the drain port 20 (120, 220).

  In addition, a bead (and / or a rib) (not shown) may be disposed in the middle of the concave portion 18 (118, 218) in the longitudinal direction to reinforce it.

Moreover, as illustrated in FIGS. 1F, 2C, and 3, the upper inclined surface 18a (24, 218a) is preferably set so as to reach the sound absorbing material 9.

  According to the above, rainwater or the like blown into the sound absorbing plate 50 (150, 250) forms a gap between the private side surface of the front plate 10 (110, 210) and the road side surface of the sound absorbing material 9. It passes through and falls onto the upper surface of the upper inclined surface 18a (24, 218a) constituting the recess 18 (118, 218). Accordingly, rainwater or the like blown into the sound absorbing plate 50 (150, 250) from the opening 8 is reliably caught by the upper inclined surface 18a (24, 218a) and guided to the drainage port 20 (120, 220) for sound absorption. The plate 50 (150, 250) can be reliably discharged to the outside.

  In the first to third embodiments described above, the drain port 20 (120, 220) has a width dimension (as an example, a substantially horizontal dimension on the paper surface of FIG. 1 (f)) as described above. You may be comprised with a slit of about 5 mm. The positions of the slits (drain ports 20, 120, 220) in the thickness direction of the sound absorbing plate 50 (150, 250) (as an example, the substantially left-right direction on the paper surface of FIG. 1 (f)) are shown in FIG. 1 (f). As illustrated, the long side on the road side of the slits (drain ports 20, 120, 220) may be disposed so as to be substantially the lower end of the upper inclined surface 18a, or approximately 5 mm on the private side. May be.

  As shown in FIG. 1 (f), if the slits (drain ports 20, 120, 220) are arranged at the lower end of the upper inclined surface 18a, the drainage capacity is further improved. Moreover, if it arrange | positions by offsetting to a private side as mentioned above, a slit (drain outlet 20, 120, 220) will become difficult to see from the road side, and the design property can be improved.

  Further, a plurality of the slits (drain ports 20, 120, 220) may be parallel to the depth direction of the sound absorbing plate 50 (150, 250) (for example, the substantially horizontal dimension of the paper surface of FIG. 2C), or It is possible to further improve the drainage capacity by arranging them in a cross (X-shaped or the like).

  In the first to third embodiments described above, as illustrated in FIGS. 4A to 4B, the upper surface portion 324 or 424 constituting the recess 318 or 418 is substantially in the installed state. You may comprise so that it may become a horizontal surface.

  According to said structure, the rain water etc. which blown in the inside of a sound-absorbing board (not shown) are the surface of the front plate 310 or 410 on the private side, and a sound-absorbing material not shown (illustrated as 9 in FIG. 3). The drainage port 320 or 420 is urged by rainwater or the like that falls to the upper surface of the upper surface portion 324 or 424 constituting the concave portion 318 or 418 through the gap between the road and the road side surface. To the outside of the sound absorbing plate (not shown).

  Moreover, as illustrated in FIG. 4C, the upper surface portion 524 and / or the lower surface inclined portion 518b constituting the concave portion 518 may be configured by a curved surface. That is, the cross-sectional shape of the recess is not limited to the substantially triangular shape as shown in the first embodiment and the third embodiment, or the substantially rectangular shape as shown in the second embodiment. Various shapes such as a rectangle, a semicircle, and a combination of a straight line and an arc can be employed.

  In addition, as illustrated in FIG. 4C, the drain port 520 may be formed in the corner portion 35 between the upper surface portion 524 of the recess 518 and the front plate 510. Also in this configuration, rainwater or the like blown into the sound absorbing plate (not shown) is surely discharged from the drain outlet 520. Further, the drainage port has a width direction dimension above the front plate from the corner portion 35 between the upper surface portion 524 of the recess 518 and the front plate 510 shown in FIG. 4C (substantially the paper surface of FIG. 4C). (Upward direction) may be formed.

  In other words, in the installed state of the sound absorbing plate for the road, a recess extending in the longitudinal direction of the sound absorbing plate for the road is formed on the front surface of the front sound plate constituting the sound absorbing plate for the road, and the upper surface of the recess What is necessary is just to provide the drainage port which can discharge the rain water etc. which connect to outside.

  By adopting the above-described configuration, rainwater or the like blown into the inside of the road sound absorbing plate from the opening formed on the road side of the road sound absorbing plate is guided to the drain outlet to the outside of the road sound absorbing plate. It becomes possible to discharge.

  In the first to third embodiments described above, the shape of the drain port 20 (120, 220) is not limited to the slit, and the inside and the outside of the sound absorbing plate 50 (150, 250) Any communication is acceptable. For example, a round hole or a square hole may be used. One or more of them may be provided, and the shape and number of the drain ports 20 (120, 220) can be changed as appropriate.

  As mentioned above, although the embodiment about the sound-absorbing board for roads of this invention was described, this invention is not limited to this, Other in the range which does not deviate from the mind and teaching as described in a claim, a description, etc. It will be understood by those skilled in the art that variations and improvements can be obtained.

5 Rivet 8 Opening (Louvre)
9 Sound-absorbing material 10a, 30a Folding portion 10t Top plate portion of front plate 12 Back plate 12a Lip portion 12t Top plate portion 12b of back plate Bottom plate portion of back plate 14 Side plate 15 Slit for draining 18 Recess 18a Upper inclined surface 18b Below Side inclined surface 20 Drain port 22 Sound absorbing material support portion 24 Recess upper surface portion 30 Front plate lower member 30a Folded portion 30b Recess lower surface portion 30c Joint portion 35 Corner portion 50 Road sound absorbing plate

Claims (4)

A sound absorbing board for roads having an opening on the front plate and a sound absorbing material inside,
On the front surface of the sound absorbing plate for roads, there is a recess extending in the longitudinal direction of the sound absorbing plate,
Provided with a drain outlet that communicates the inside and the outside of the sound absorbing plate at the corners of the upper surface of the recessed portion and / or the upper surface of the recessed portion and the front plate of the sound absorbing plate,
It is characterized by
The sound absorbing plate for roads , wherein the concave portion has an upper inclined surface that is inclined from the upper side of the concave portion toward the upper back of the sound absorbing plate.   A sound absorbing board for roads having an opening on the front plate and a sound absorbing material inside,
  On the front surface of the sound absorbing plate for roads, there is a recess extending in the longitudinal direction of the sound absorbing plate,
  Provided with a drain outlet that communicates the inside and the outside of the sound absorbing plate at the corners of the upper surface of the recessed portion and / or the upper surface of the recessed portion and the front plate of the sound absorbing plate,
It is characterized by
  A sound-absorbing material support is connected to the recess,
A sound-absorbing board for roads.   A sound absorbing board for roads having an opening on the front plate and a sound absorbing material inside,
  On the front surface of the sound absorbing plate for roads, there is a recess extending in the longitudinal direction of the sound absorbing plate,
  Provided with a drain outlet that communicates the inside and the outside of the sound absorbing plate at the corners of the upper surface of the recessed portion and / or the upper surface of the recessed portion and the front plate of the sound absorbing plate,
It is characterized by
  The concave portion is disposed at a position below the lowermost opening,
  The surface on the sound absorbing material side of the front plate and the surface on the front plate side of the sound absorbing material have a gap, and the drain port faces the gap.
A sound-absorbing board for roads. The concave portion has a lower inclined surface that is inclined from the lower side of the concave portion toward the upper back of the sound absorbing plate.
The sound-absorbing board for road according to any one of claims 1 to 3, wherein