JP2009062676A - Sound absorbing panel, sound absorbing structure using this sound absorbing panel, and mounting method for this sound absorbing panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound absorbing panel to be attached to a wall of a tunnel, a ditch or the like and a mounting method for this sound absorbing panel for enhancing the sound absorbing effect as much as possible by reducing the size of a clearance caused between adjacent sound absorbing panels as much as possible and increasing area of a section covered with the sound absorbing panel. <P>SOLUTION: In this mounting method for the sound absorbing panel, either of a pair of fixing plates provided in right and left side face parts of a box-like body is provided at a position being closer to a face side on one side or a face side on the other side by amount of thickness being substantially equal to thickness of the fixing plate than the other fixing plate, and the fixing plates at point symmetrical positions are at the same positions being closer to the face side on one side or the face side on the other side and are mutually connected and fixed onto a mounting fitting while the fixing plates of adjacent sound absorbing panels are mutually overlapped. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sound-absorbing panel that is attached to a wall surface or ceiling surface of a tunnel, a moat, and the like and absorbs noise from a traveling automobile, a sound-absorbing structure composed of the sound-absorbing panel, and a method for attaching the sound-absorbing panel It is about.

  The car that is running generates a lot of noise, and when the car enters a tunnel or moat, the noise generated from the car is reflected by the walls of the tunnel or moat and returns to the car. People must withstand considerable noise. Therefore, at present, the walls of tunnels, moats, etc. are covered with sound-absorbing panels, and noise generated from automobiles is absorbed by the sound-absorbing panels, and the internal noise of tunnels, moats, etc. is considerably reduced, and they are in cars that run inside the tunnels. The burden on human noise has been significantly reduced.

  9 is a front view of an example of a conventional sound absorbing panel, FIG. 10 is a back view of the example of a conventional sound absorbing panel, and FIG. 11 is a cross-sectional view of an example of a conventional sound absorbing panel. In these drawings, reference numeral 100 denotes a sound absorbing panel. The sound absorbing panel 100 includes a frame body 102, a perforated plate 104 provided on one surface side of the frame body 102, and a sound absorbing material 106 fitted in the frame body 102. It consists of.

  The frame 102 includes upper and lower frame members 108 and 110, left and right frame members 112 and 114, a plurality of crosspiece members 116 that obliquely connect the upper and lower frame members 108 and 110, a perforated plate 104, and a sound absorbing material 106. And a spacing member 118 that forms a predetermined spacing between them. The perforated plate 104 is formed of a plate-like body having a large number of through holes in a mesh shape. The crosspiece 116 supports the sound absorbing material 106 so that the sound absorbing material 106 does not fall off from the frame body 102.

  The sound absorbing panel 100 is attached to the inner wall of the tunnel using anchor bolts (not shown) and mounting brackets (not shown). That is, an anchor bolt is driven into the tunnel inner wall, a mounting bracket is attached to the anchor bolt, and the left and right frame members 112 and 114 of the sound absorbing panel 100 are connected to the mounting bracket with bolts and nuts, so that the sound absorbing panel 100 is attached to the tunnel inner wall. It is attached. Adjacent sound absorbing panels 100 are attached to the wall surface of the tunnel via attachment fittings so that the frame members are arranged side by side.

According to the sound absorbing panel 100, the noise that has entered through the many through holes of the perforated plate 104 is partially absorbed by the sound absorbing material 106, and the noise that has passed through the sound absorbing material 106 leaves the sound absorbing panel 100 and enters the tunnel wall. It is reflected by the tunnel wall and enters the sound absorbing material 106 again from the back side of the sound absorbing panel, where it is absorbed again. For this reason, the noise returning to the car is considerably reduced.
Japanese Patent No. 3647252

  The problem to be solved by the present invention is that the conventional sound absorbing panel has a considerable gap between adjacent sound absorbing panels, and a portion not covered with the sound absorbing panel has a considerable area. This is the point that the noise coming out of is not sufficiently absorbed.

  In addition, it is conceivable that the frame members of adjacent panels are attached to each other, but in this case, a step corresponding to the thickness of the frame material is generated on the front side of the adjacent sound absorbing panel. Since this step appears on the road side, it is desirable that the step does not occur on the landscape.

  One of the pair of fixed plates provided on the left and right side portions of the box-shaped body in order to increase the sound absorption effect as much as possible by reducing the gap between the sound absorption panels attached to the walls of tunnels, moats, etc. The fixing plate is provided at a position closer to one surface side or the other surface side than the other fixing plate by a thickness substantially the same as the thickness of the fixing plate, and the fixing plate at the point symmetry position is provided on one surface side or The main feature is that they are located at the same position from the other surface, and can be connected and fixed to the mounting bracket in a state where the fixing plates of the adjacent sound absorbing panels are stacked.

  Since the present invention is connected and fixed to the mounting bracket in a state where adjacent fixing plates of the adjacent sound absorbing panels are overlapped, the gap between the adjacent sound absorbing panels is narrowed, and the sound absorbing panel covered by a wall such as a tunnel is provided. There is an advantage that the proportion of the area increases, the proportion of the noise generated by the automobile in the tunnel is increased, and the inside of the tunnel becomes quieter.

  Further, in the present invention, since the fixing plates facing each other of the adjacent sound absorbing panels are overlapped and fixed to the mounting bracket, the number of locations where the fixing plate and the mounting bracket are connected and fixed is reduced. There are advantages that the required number of bolts and nuts is halved, the burden of mounting work is reduced, and the cost of mounting work can be reduced.

  Further, according to the present invention, among the fixed plates provided on the side plate, the side plate is left and right with the fixed plate at the point-symmetrical position of the sound absorption panel being set to the same position in the width direction of the side plate. As a result, it is sufficient to prepare one type of side plate. As a result, there is an advantage that costs can be reduced by sharing parts.

  Further, according to the present invention, since the spacing member is provided at a substantially right angle with respect to the upper and lower edges on one surface side of the box-like body, the sound absorbing plate can be bent at the time of mounting the sound absorbing plate on the wall. Thus, it is possible to replace the overlapping fixed plates up and down, and therefore, there is an advantage that it is easy to install the sound absorbing plate on the wall.

  Further, even if the fixing plates of the adjacent sound absorbing panels are stacked and connected and fixed to the mounting bracket, there is an effect that the front plate side of the adjacent sound absorbing panels can be mounted flush without any step.

  In addition, since the present invention has the role of a back plate on the wall of a tunnel or the like, it is not necessary to prepare a back plate, and therefore it is possible to reduce the cost of materials and processing by the amount of the back plate. There is an advantage that you can.

  In addition, since the present invention has the role of a back plate on the wall of a tunnel or the like, the space between the sound absorbing material and the wall can be widened, and therefore, there is an advantage that the effect of attenuating noise is great. is there.

  In addition, when a concealing bracket that conceals the gap is fitted in the gap between adjacent sound absorbing panels, noise reflected by the tunnel wall is not released in the road direction, and the sound absorbing effect can be enhanced. Since the surface on the front side of the surface becomes the same and appears continuously, there is an advantage that the landscape is improved.

  With a simple configuration, the objective is to make the gap between the sound absorbing panels to cover walls such as tunnels and moats as narrow as possible, to increase the proportion of the area covered by the sound absorbing panels as much as possible, and to enhance the sound absorbing effect as much as possible. This has been achieved without compromising workability during installation.

  1 is a perspective view showing the state of the front side of the sound absorbing panel, FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, FIG. 3 is a perspective view showing the state of the back side of the sound absorbing panel, and FIG. FIG. 5 is an enlarged view of a portion B in FIG.

  In these drawings, reference numeral 10 denotes a sound absorbing panel. The sound absorbing panel 10 includes a flat box-like body 12 opened on one side, that is, the back side, and a sheet-like sound absorbing material housed in the box-like body 12. 14, a bar-shaped spacing member 16 that holds the sound absorbing material 14 from the back side and stops the sound absorbing material 14 from falling off the box-shaped body 12, and a fixing plate 18 that attaches the box-shaped body 12 to the wall.

  The box-shaped body 12 includes a front plate 20 and a pair of side plates 22 and 22 attached to the left and right sides of the front plate 20. The front plate 20 is formed of a plate-like body in which the other surface side, that is, the front side of the sound absorbing panel is formed in a mesh shape by a large number of through holes, and upper and lower edges are folded back in a substantially U shape on the back side. The side plate 22 is made of a plate-like body that is bent in a substantially U-shaped cross section.

  In general, the sound absorbing material 14 is preferably made of glass wool or rock wool, but is made of metal fiber such as aluminum, metal fiber bonded through a binder, metal powder, ceramic powder, metal short fiber. It may be made of a sintered material obtained by sintering, etc., or may be made of a foamed material such as a metal foamed material, an organic foamed material, or an inorganic foamed material, and the kind thereof is not particularly limited. The sound-absorbing material 14 is generally installed in a state in which the periphery is protected by a protective film.

  The spacing member 16 is composed of a rod-shaped body having a substantially L-shaped cross section, and both ends of the spacing member 16 are attached to the vicinity of the upper and lower edges on the back side of the front plate 20, that is, the portion bent into a substantially U-shaped section. Yes. The spacing member 16 is substantially perpendicular to the upper and lower edges of the front plate 20.

  The fixed plate 18 is formed of a metal fitting bent in an L shape, and a pair of side plates 22 are provided at predetermined intervals on the side plate 22. One flat portion of the fixing plate is connected to the side plate, and the other flat portion of the fixing plate 18 is provided with a bolt insertion hole 24. The hole 24 is a long hole.

  The pair of fixed plates 18, 18 attached to one side plate 22 has a box-shaped body 12 in which one of the fixed plates 18 is substantially equal in thickness to the fixed plate 18 than the other fixed plate 18. It is in a position close to the back side or the front side (shifted in the width direction of the side plate by substantially the same thickness as the fixed plate 18). In one sound-absorbing panel, the fixed plates 18 and 18 that are in point-symmetric positions are located at the same position from the back side or the front side of the box-like body 12.

  Next, the procedure for attaching the sound absorbing panel to the tunnel inner wall or the moat split wall will be described.

  First, a hole is made in the wall, an anchor bolt 26 is implanted in the hole, and a mounting bracket 28 is attached to the anchor bolt 26. Next, the sound absorbing panel 10 is covered with a wall, the fixing plate 18 of the sound absorbing panel 10 is overlaid on the mounting bracket 28, and the fixing plate 18 is connected and fixed to the mounting bracket 28 with bolts and nuts 30.

  Here, as shown in FIG. 6A, the fixing plate 18 of another adjacent sound absorbing panel 10 is overlaid on the fixing plate 18 of one sound absorbing panel 10, and the sound absorbing panel 10 is placed on the wall in this state. Install temporarily. Then, with respect to the fixed plates 18 and 18 that are upside down due to the positional relationship from the back side or the front side of the box-like body 12, the adjacent sound absorbing panels 10 are moved up and down as shown in FIG. In this state, the fixed plates 18 and 18 are reversed so that they are lifted, and in this state, as shown in FIG. Then, as shown in FIG. 6D, the fixing plates 18 and 18 are overlapped. Then, these fixing plates 18 and 18 are connected and fixed to the mounting bracket 28 with bolts and nuts 30. By repeating such an operation, the sound absorbing panel 10 is sequentially covered on the inner wall of the tunnel.

  Note that there is a slight gap between adjacent sound absorbing panels 10, but this gap has a length substantially equal to the width of the sound absorbing panel 10 as shown in FIG. A concealing metal fitting 32 may be fitted to hide the gap and the fixing metal fittings (fixing plate 18, anchor bolt 26, attachment metal fitting 28, bolt / nut 30).

It is a perspective view which shows the state of the front side of a sound absorption panel. It is AA arrow sectional drawing of FIG. It is a perspective view which shows the state of the back side of a sound absorption panel. It is a perspective view which shows the attachment state of a sound absorption panel. It is the B section enlarged view of FIG. It is explanatory drawing explaining the procedure of the front | former stage at the time of attaching a fixing plate to a mounting bracket. It is explanatory drawing explaining the procedure of the back | latter stage at the time of attaching a fixing plate to a mounting bracket. It is explanatory drawing which shows the state which attaches a concealment metal fitting to the clearance gap between sound absorption panels. It is a front view of an example of the conventional sound absorption panel. It is a reverse view of an example of the conventional sound absorption panel. It is sectional drawing of an example of the conventional sound absorption panel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Sound absorption panel 12 Box-shaped body 14 Sound absorption material 16 Spacing material 18 Fixing plate 20 Front plate 22 Side plate 24 Hole 26 Anchor bolt 28 Mounting bracket 32 Concealment bracket

Claims (4)

  A flat box-like body opened on one side, a sound-absorbing material housed in the box-like body, and one or more bar-like spacing members that prevent the sound-absorbing material from being removed from one side; A fixing plate for attaching the box-like body to a wall, and both end portions of the spacing member are attached in the vicinity of upper and lower edges on one surface side of the box-like body, and the spacing member is one side of the box-like body. The fixing plate has at least one pair on the left and right side portions of the box-like body, and the pair of fixing plates are fixed to either one of the fixing plates. The plate is positioned closer to one surface side or the other surface side than the other fixed plate by a thickness substantially the same as the thickness of the fixed plate, and the fixed plate at the point-symmetrical position is the one surface side or the other surface side. A sound-absorbing panel characterized by being at the same position from the surface.   A wall and a sound absorbing panel attached to the wall at a predetermined interval. The sound absorbing panel includes a flat box-like body having one side opened, and a sound-absorbing material housed in the box-like body. 1 or 2 or more rod-shaped space | interval material which prevents removal | extraction of this sound-absorbing material from one surface side, and the fixing plate which attaches this box-shaped body to a wall, The both ends of this space | interval material are this box-shaped body The spacing member is attached to the vicinity of the upper and lower edges on one surface side of the box-like body, and the fixing plate is formed in the box shape. At least a pair is provided on the left and right side surfaces of the body, and the pair of fixing plates has either one fixing plate that is substantially equal in thickness to the fixing plate than the other fixing plate. The fixed plate at the point-symmetrical position is located on the other surface side. Sound absorbing structure, characterized in that from the plane of the square in the same lateral shift positions.   The sound absorbing structure according to claim 2, wherein a concealing metal fitting for concealing the gap is fitted into a gap between adjacent sound absorbing panels.   An anchor bolt is planted on a wall, a mounting bracket is mounted on the anchor bolt, the sound absorbing panel according to claim 1 is covered on the wall, a fixing plate of the sound absorbing panel is overlaid on the mounting bracket, and the fixing is performed on the mounting bracket. A sound absorbing panel mounting method for attaching a sound absorbing panel to a wall by connecting and fixing plates, wherein the adjacent sound absorbing panels are stacked on the fixing plate of one sound absorbing panel. With the fixed plate that is temporarily attached to the wall and upside down, the adjacent sound absorbing panels are distorted so that each fixed plate is lifted, and in this state, the upper and lower sides of these fixed plates are switched, and then A mounting method for a sound absorbing panel, wherein these fixing plates are connected and fixed to a mounting bracket.

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