JP3207432U - Rainwater induction block for sound absorbing plate and sound absorbing plate for road noise barrier using the same - Google Patents

Abstract

[PROBLEMS] To realize a sound absorbing plate for a soundproof wall of a road, and to prevent stagnation of rainwater in an internal space at a low cost while suppressing an increase in manufacturing effort. A rainwater induction block 5 is inserted into a lower portion of an internal space formed between a back panel 2 and a front panel 3 of a sound absorbing plate 1 while being supported by a bottom wall 2c of the back panel. 5 has an upper surface 5a inclined in a horizontal or front-down direction, and the upper surface 5a guides rainwater flowing into the sound absorbing plate to the front panel 3 side. [Selection] Figure 5

Description

  The present invention relates to a rainwater guiding block incorporated in a sound absorbing plate of a soundproof wall installed beside a road as a noise countermeasure on an expressway and the like, and a sound absorbing plate of a road soundproof wall using the same.

  A soundproof wall installed on an expressway or the like is constructed by stacking a plurality of box-type sound absorbing plates between H-type support columns standing at regular intervals on the side of the road.

  FIG. 7 shows a partially enlarged view of the stacked sound absorbing plates. The illustrated sound absorbing plate 1 is obtained by locking a front panel 3 such as a louver having a large number of gaps to a rear panel 2 bent into a substantially U-shape, and having a sound absorbing material 4 loaded therein (the following patent) Reference 1).

  As shown in the figure, the front panel 3 has a flange 3b at the upper end fixed to the top wall 2b of the rear panel 2 with a rivet 6, and the lower end of the front panel 3 is provided on the bottom wall 2c of the rear panel 2. A bending return portion 3c bent so as to embrace the suspended rim 2e is provided and locked to the rim 2e by so-called gob fitting.

  Since such a gourd fitting part easily collects rainwater that causes corrosion, the drainage slit 3f is provided at the lower end of the gouge fitting part as shown in the figure for the purpose of preventing corrosion. Provided.

  In addition, the box type sound absorbing plates need to be stacked, and the top wall 2b and the bottom wall 2c of the back panel 2 are inclined in the direction in which the rear part (the left end in the figure) is lowered. Since rainwater tends to stay in the internal space at the rear of the wall 2c, the following measures are taken for drainage.

  One of the countermeasures is to provide a drain hole 9 near the rear part of the bottom wall 2c as shown in FIG.

  As the second countermeasure, as shown in Patent Documents 2 and 3 below, in the lower part of the sound absorbing plate, between the front plate (referred to as the front plate in Patent Document 3) and the back plate, An inclined drainage treatment material (referred to as a water guide plate in Patent Document 3) is provided to guide rainwater that has flowed into the interior to the gouge fitting portion side where a drainage slit is provided.

  The sound absorbing plate of Patent Document 4 also takes measures similar to those of Patent Documents 2 and 3. In Patent Document 4, the bottom wall integral with the back panel is inclined in the forward and downward direction, and the rearwardly inclined surface necessary for stacking the plurality of sound absorbing plates is between the top wall of the lower sound absorbing plate. A shoe that fills the gap that can be formed is fixed to the rear end of the bottom wall and provided on the shoe.

Utility Model Registration No. 3187101 Utility Model Registration No. 3192574 JP2015-86653A Utility Model Registration No. 3192455

  Measures for installing the drain holes 9 near the rear part of the bottom wall 2c are restricted to increase the diameter of the drain holes 9 or increase the number of installations in order to ensure the strength of the sound absorbing plate and to suppress the reduction of the sound absorption. The drain holes 9 whose hole diameter and number of installations are restricted are clogged with foreign matter such as dust that has entered the sound absorbing plate 1, and the drainage is not thorough.

  The above Patent Documents 2 to 4 and the like have been conceived as countermeasures for the problem, but because a wastewater treatment material, a water guide plate, a filling shoe, etc. that are not included in the sound absorbing plate of Patent Document 1 are additionally provided Compared with the sound absorbing plate of Patent Document 1, an increase in material costs and an increase in manufacturing time are involved, leading to an increase in cost.

  An object of the present invention is to realize the prevention of rainwater stagnation in the internal space of a sound absorbing plate constituting a soundproof wall of a road at a low cost while suppressing an increase in manufacturing effort.

  In order to solve the above problems, in the present invention, a rear panel having a substantially U-shaped cross section having a bottom wall and a top wall, a front panel fixed to a tip portion of the bottom wall and the top wall, and the rear surface A sound absorbing material loaded between the panel and the front panel, wherein the bottom wall and the top wall have a slope that inclines in a rearward downward direction, and the bottom wall has a rim depending on the tip, the rim In contrast, a substantially U-shaped bent-back portion formed at the lower end portion of the front panel is locked so as to embrace the rim, and a sound absorbing plate having a slit at the bottom of the bent-back portion is provided. A rainwater induction block inserted into a lower portion of an internal space created between the back panel and the front panel, and having a top surface inclined in a horizontal or front-down direction, and the top surface flows into the sound absorbing plate. Will guide the rainwater to the front panel side Providing configured rainwater guide block to.

  The rainwater induction block is preferably made of foamed plastic such as polystyrene foam having excellent water resistance and water shielding.

  The foamed plastic preferably has closed cells, but a foamed plastic having open cells can also be used if a water barrier coating is provided on the surface.

  Further, the rainwater induction block preferably has a surface subjected to a fire prevention treatment using a flame retardant or the like.

  This device is loaded between a rear panel having a bottom wall and a top wall, and having a substantially U-shaped cross section, a front panel fixed to the bottom wall and the top end of the top wall, and the back panel and the front panel. The bottom wall and the top wall have a slope inclined in a rearwardly descending direction, the bottom wall has a rim depending on the tip, and the lower end of the front panel with respect to the rim. A substantially U-shaped bent-back portion formed in the portion is locked so as to embrace the rim, and a slit is provided at the bottom of the bent-back portion, the back panel and the front panel A sound absorbing plate of a road soundproof wall in which the rainwater guiding block is inserted is also provided at the bottom of the internal space created between the two.

  The sound absorbing plate may adhere the rainwater induction block to a back panel or the like, but the rainwater induction block abuts against the bottom wall and the back wall of the back panel by the action of its own weight and the gradient of the bottom wall. Since the upward displacement is prevented by the sound absorbing material, it is held at a fixed position without performing a fixing process on the rear panel or the like.

  The rainwater induction block of this device has a simple shape with a top surface that is inclined in the horizontal or forward-down direction, and it reliably discharges rainwater that has flowed into the sound absorbing plate to the outside and is reliable for preventing corrosion of the sound absorbing plate. Can be increased.

  Since this rainwater induction block can be made of an inexpensive foamed plastic such as polystyrene foam, an increase in cost due to an increase in material costs can be avoided.

  In addition, what formed the rainwater induction block with the foamed plastic which has a closed cell does not require the surface water-shielding process, and the reduction effect of manufacture and the suppression effect of a cost increase are exhibited to the maximum.

  Moreover, the rainwater guiding block subjected to fireproofing treatment does not easily burn even if a vehicle fire due to a traffic accident occurs near the soundproof wall.

  In addition, the sound absorbing plate of the present invention includes the rainwater guiding block inside, and rainwater flowing into the sound absorbing plate is guided to the front panel side by the upper surface of the rainwater guiding block.

  Therefore, the member provided integrally with the conventional sound absorbing plate, that is, the wastewater treatment material of Patent Document 2, the water guide plate of Patent Document 3, or the filling shoe of Patent Document 4 is not required, and the interior of the sound absorbing plate is not required. It is possible to prevent stagnation of rainwater in the space while suppressing an increase in manufacturing effort.

It is a perspective view which shows an example of the rain water induction block for sound-absorbing plates of this device. It is sectional drawing which shows the modification of a rainwater guidance block. It is sectional drawing which shows the other modification of a rainwater guidance block. It is a perspective view of the state where the edge which shows an example of the sound-absorbing board of this device was cut off. It is sectional drawing of the sound-absorbing board of FIG. It is a partial expanded sectional view which shows the stacked part of the sound-absorbing board of FIG. It is a partial expanded sectional view which shows the stacking part of the conventional sound-absorbing board.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a sound absorbing plate rainwater guiding block and a sound absorbing plate for a road noise barrier using the sound absorbing plate according to the present invention will be described below with reference to FIGS.

  1 has a top surface 5a, a back surface 5b, a bottom surface 5c, and both side surfaces 5d and 5d. As shown in FIGS. 2 and 3, a cross section (a cross section cut in a direction perpendicular to the longitudinal direction) is provided. ) Forms a triangle. The rainwater induction block 5 is formed of a water-resistant material (regardless of type).

  The upper surface 5a of the rainwater guiding block 5 in FIG. 1 is inclined in the forward and downward direction, but may be horizontal as shown in FIG. Rainwater dropped on the upper surface 5a flows to the side where the drainage part is located even when the upper surface is horizontal, so there is no hindrance to drainage.

  The back surface 5b of the rainwater guiding block 5 is vertical and is in close contact with the inner surface of the back wall 2a of the sound absorbing plate 1 described later. Further, the bottom surface 5c of the rainwater guiding block 5 is incliningly in contact with the inner surface of the bottom wall 2c of the sound absorbing plate 1 described later.

  The rainwater guiding block 5 of the present invention can be subjected to a fire prevention process. Reference numeral 7 in FIG. 2 is a flame retardant coating film 7 formed by applying a flame retardant to the surface. The flame retardant coating film 7 imparts flame retardancy.

  The flame-resistant coating film 7 is formed using, for example, a neutral ammonium sulfate flame retardant (a flame retardant) sold by Japan Disaster Prevention Chemical Research Co., Ltd.

  The rainwater induction block 5 shown in FIG. 1 and FIG. 2 is formed of a foamed resin such as polystyrene foam having closed cells and does not require special treatment for water shielding, but as shown in FIG. If the water-impervious coating 8 that does not allow water to pass through is formed on the surface of the rainwater guide block 5, the rainwater guide block 5 made of foamed resin or the like having communication bubbles can also be used.

  4-6 has shown an example of the sound-absorbing board of the road noise barrier which employ | adopted the rainwater guidance block 5 of this invention.

  The illustrated sound absorbing plate 1 includes a rear panel 2 having a substantially U-shaped cross section, a front panel 3 in which a large number of air gaps 3a are cut and raised like a louver, and a rear panel 2 and a front panel. 3 is composed of a sound absorbing material 4 loaded in a space (inner space) 3 and the above-described rainwater guiding block 5 inserted in the lower portion of the inner space.

  The back panel 2 has a standing back wall 2a, a flat top wall 2b continuous with the upper end of the back wall 2a, and a flat bottom wall 2c continuous with the lower end of the back wall 2a.

  The top wall 2b is bent at the upper end of the back wall 2a so that the angle formed with the back wall 2a forms an obtuse angle and extends toward the front panel 3, while the bottom wall 2c is bent at the lower end of the back wall 2a. Are bent so as to extend toward the front panel 3 with an acute angle.

  Rims 2d and 2e that are bent downward and hang down are provided at the front end edges of the top wall 2b and the bottom wall 2c, respectively.

  The front panel 3 has a flange 3b that protrudes toward the back panel 2 at the upper end through the upper step 3d, and is folded back to the inner surface at the lower end through the lower step 3e. It has a substantially U-shaped bent-back portion 3c.

  The flange 3b is formed at an angle corresponding to the inclination of the top wall 2b of the back panel 2, and the flange 3b is superimposed on the top wall 2b and fixed to the top wall 2b by a rivet 6.

  Further, the lower end of the front panel 3 is so-called gobly fitted to the rim 2e in such a manner that the rim 2e at the tip of the bottom wall of the rear panel 2 is inserted into the bent back portion 3c and the rim 2e is held.

  And the slit 3f for drainage which penetrates the bending return part 3c is provided in the corner of the bending return part 3c which is the bottom part of the gouge fitting part at predetermined intervals in the width direction of the sound-absorbing plate as shown in FIG. It has been.

  The edge of the leading edge of the rainwater guiding block 5 has the highest position on the leading end side of the bottom wall 2c of the back panel 2 with the back surface 5b of the rainwater guiding block 5 in contact with the inner surface of the back wall 2a of the back panel. It is in the vicinity of the front panel 3 in the vicinity of the existing position or the position.

  The back surface 5b of the rainwater guiding block 5 is preferably configured as a surface that is in close contact with the inner surface of the back wall 2a of the back panel 2. When the back surface 5b is in close contact with the back wall 2a of the back panel 2, it is difficult for rainwater to penetrate between the back surface 5b and the back wall 2a.

  For the same reason, it is preferable that the bottom surface 5c of the rainwater guiding block 5 is also configured as a surface that is in close contact with the inner surface of the bottom wall 2c of the back panel.

  The rainwater induction block 5 provided in the illustrated sound absorbing plate 1 is inserted without being fixed in the internal space formed between the back panel 2 and the front panel 3.

  In this non-fixed arrangement, it is conceivable that rainwater permeates between the back wall 2a of the back panel and the rainwater guide block 5 and between the bottom wall 2c of the back panel and the rainwater guide block 5. If a drainage hole as shown in Patent Document 1 is provided near the rear end of 2c, even if rainwater permeates, the rainwater does not stay.

  The rainwater guiding block 5 may be adhered to the back wall 2a and the bottom wall 2c of the back panel with a water-resistant adhesive, and in that case, a gap between the back wall 2a and the bottom wall 2c. Is closed with an adhesive, so that there is no fear of rainwater permeating into the gap.

  Thus, in the sound absorbing plate of the present invention in which the rainwater guiding block 5 is inserted in the lower part of the internal space, the upper surface 5a of the rainwater guiding block 5 has a slanted front slope. Is guided to the front panel 3 side by the upper surface 5a, and is discharged to the outside through a slit 3f provided in the bent back portion 3c at the lower part of the front panel. As a result, corrosion caused by rainwater is suppressed, and the life of the sound absorbing plate is extended.

DESCRIPTION OF SYMBOLS 1 Sound-absorbing board 2 Back panel 2a Back wall 2b Top wall 2c Bottom wall 2d, 2e Rim 3 Front panel 3a Blade plate 3b Bending part 3c Bending part 3d Upper step part 3e Lower step part 3f Slit 4 Sound absorbing material 5 Rain water induction block 5a Top surface 5b Back surface 5c Bottom surface 5d Side surface 6 Rivet 7 Flame-resistant coating 8 Water-shielding coating 9 Drainage hole

Claims (6)

  A back panel having a substantially U-shaped cross section having a bottom wall and a top wall, a front panel fixed to the bottom wall and the tip of the top wall, and a sound absorbing material loaded between the back panel and the front panel The bottom wall and the top wall have a slope inclined in a rearwardly descending direction, and the bottom wall has a rim depending on the tip, and is formed at a lower end portion of the front panel with respect to the rim. An inner portion created between the back panel and the front panel of the sound absorbing plate, in which a substantially U-shaped bent-back portion is locked so as to embrace the rim, and a slit is provided at the bottom of the bent-back portion. A rainwater induction block inserted into the lower portion of the space, having a top surface inclined in a horizontal or front-down direction, the top surface being configured to guide rainwater flowing into the sound absorbing plate toward the front panel side Rainwater induction block for sound absorbing board.   The rainwater induction block for a sound-absorbing plate according to claim 1, which is made of foamed plastic having closed cells.   The rainwater induction block for a sound-absorbing plate according to claim 1, wherein the rainwater-guiding block for the sound-absorbing plate is formed of a foamed plastic having open air bubbles and has a water-shielding film formed on the surface.   The rainwater induction block for a sound-absorbing plate according to any one of claims 1 to 3, wherein the surface is subjected to a fireproofing treatment.   A back panel having a substantially U-shaped cross section having a bottom wall and a top wall, a front panel fixed to the bottom wall and the tip of the top wall, and a sound absorbing material loaded between the back panel and the front panel The bottom wall and the top wall have a slope inclined in a rearwardly descending direction, and the bottom wall has a rim depending on the tip, and is formed at a lower end portion of the front panel with respect to the rim. A substantially U-shaped bent-back part is locked so as to embrace the rim, and a slit is provided at the bottom of the bent-back part, between the back panel and the front panel. The rainwater guiding block according to any one of claims 1 to 3 is inserted in a lower portion of the created internal space, and an upper surface of the rainwater guiding block guides rainwater flowing into the sound absorbing plate toward the front panel. The sound-absorbing board of the road noise barrier constructed.   The sound absorbing plate for a road noise barrier according to claim 5, wherein the rainwater guiding block is bonded to a back wall and a bottom wall of the back panel with a water-resistant adhesive.

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