JP2003155711A - Unit type louver system for elevated road rear face sound absorbing plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a unit type louver system for an elevated road rear face sound absorbing material composed so it can be suspended from a backing material of an elevated road rear face. SOLUTION: A back face plate has side wall parts formed by bending both longitudinal side edges downward, one portions of side walls is formed in lateral edges by bending them in small width sizes, and the back face plate is formed into a downward facing groove shape as a whole. End part plates forming the side walls of the lateral edges of the back face plate are formed with a length the same as the lateral edges and a height the same as the side wall parts formed on both longitudinal side edges of the back face plate, and joining parts with the back face plate are integrally coupled. A sound absorbing material is filled in a box shaped container with an opened bottom face formed by the back face plate and the end part plates. A plurality of louvers are attached via a plurality of louver holding members fixedly attached to the bottom face of the box shaped container with the opened bottom face formed by the back face plate and the end part plates.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention improves the aesthetic appearance of the underside of an elevated road (hereinafter referred to as the elevated road backside),
In addition, the noise generated by cars and trains running under the overpass is prevented from being reflected on the backside of the elevated road and diffused to the surrounding area, and the vibration generated by the vehicle running over the overpass is transmitted through the floor board as a secondary propagation sound. It belongs to the technical field of a unit for a sound absorbing plate that functions to reduce noise. More specifically, a unit having a plurality of members integrated, in which a box-shaped container having an open lower surface is formed by a back plate and an end plate, a sound absorbing material is filled in the container, and a plurality of louvers are arranged on the open lower surface side. In addition, the present invention relates to a unit louver system for a backside sound absorbing board of an elevated road, in which the backside portion of the backboard can be hung and supported by a hanging means on a base material on the backside of the elevated road.

[0002]

2. Description of the Related Art Conventionally, it is possible to improve the appearance when looking up at the back of an elevated road, and to prevent noise generated by cars or trains running under the elevated road from being reflected on the back of the elevated road and diffused into the surrounding area. In addition, the sound absorption function that reduces the secondary propagation sound that the vibration generated by the vehicle traveling on the overpass is transmitted through the floor board,
As means for providing a corridor for maintenance and inspection of undergirders such as elevated roads, for example,

(1) Patent No. 3196 owned by the applicant
The “Sound absorption system for scaffolding on the underside of girder” disclosed in Japanese Patent No. 138 (filed on April 20, 1998, issued on August 6, 2001) absorbs sound on a beam suspended on the underside of the girder. It is constructed by laying the material horizontally along with the corridor material. The beam is installed horizontally with a certain space, and a plurality of metal louvers are bolted to the lower surface of the lower flange of the beam in parallel with a certain space, and a sound absorbing material is placed on the louver. To place. The upper surface of the sound absorbing material is not at the same level as the upper surface of the upper flange of the beam, and a corrugated plate is laid on the upper surface of the upper flange of the beam as a corridor (mainly the invention of claim 1). In short, each member constituting the scaffolding / sound absorbing system on the underside of the girder is constructed by sequentially assembling the small beams suspended on the underside of the girder.

(2) Next, the "sound absorbing panel" disclosed in Japanese Patent No. 2953989 (filed on May 9, 1995, issued on September 27, 1999) is a frame material forming a peripheral side wall. To form a panel frame whose upper and lower surfaces are open, attach a plurality of louvers to the lower surface of the panel frame at regular intervals, and fill the louvers in the panel frame with a sound absorbing material. A shielding plate (back plate) is attached to the upper surface side of the panel frame to close it. In short, attention is paid to a configuration in which a plurality of members are integrated and unitized. It is also accepted that the shielding plate doubles as a corridor material.

[0005]

The above-mentioned prior art (1), "Sound absorption system for scaffolding on the underside of girders", refers to a beam suspended from each member constituting the system on the underside of the girder. It is built by the method of assembling in order,
Mainly on-site assembly work, there are many types and quantities of materials to be delivered to the site, which is not only troublesome to manage,
There is a problem that a lot of man-hours are required for assembling work on site, and it takes a lot of work to prolong the construction period.

In that respect, the "sound absorbing panel" of (2) above is
Since the required multiple members are integrated and unitized, factory processing will increase. It is possible to reduce the type and quantity of materials to be delivered to the site, reduce the number of assembly steps on site, and shorten the construction period.

However, in the construction of the sound absorbing panel of the above (2), a panel frame (upper and lower surfaces are opened by forming a rectangular frame-shaped frame material forming a peripheral side wall of the panel and having a groove-shaped steel cross section) Since the peripheral wall is formed, it takes a lot of time and labor for the framework work. Regarding the means for mounting a plurality of louvers on the lower surface side of the panel frame at regular intervals, it is only explained that both ends of the louver are respectively locked to the surface (lower surface) of the frame material facing each other. No specific description is found in the drawings. It is recognized that the louver in the panel frame is filled with a sound absorbing material, and a shielding plate (rear plate) is attached to the upper surface side of the panel frame to close the sound absorbing panel. According to FIG. 9 showing an example of attachment to the back surface side, there is only description of attachment to the base material, and the specific structure is unknown. On the other hand, in the sound absorbing panel of FIG. 8, a thick wall portion having a rectangular cross section is provided on the upper portion of the panel frame, and the shaft portion and the head of the bolt which is turned upside down can be slid on the upper surface portion thereof. It can be inferred that the groove may be provided in the longitudinal direction, and the groove may be attached to the base material by the upward bolt passing through the groove. This seems to be a rational structure at first glance, but a thick section with a rectangular cross section is provided at the top of the panel frame.
Providing a groove having a convex cross section in the longitudinal direction means that this panel frame is manufactured as a custom-made product, so that it must be said that the structure is uneconomical and costly.

In short, the structure of the "sound absorbing panel" of the above-mentioned prior art (2) is a structure that is not yet concrete as a whole and the technical perfection is low.

The object of the present invention is to achieve the above-mentioned prior art (2).
SUMMARY OF THE INVENTION It is an object of the present invention to provide a unit type louver system for a backside sound absorbing board of an elevated road, which solves all of the drawbacks and problems.

A more specific object of the present invention is to provide a sound absorbing system for scaffolding on the underside of girders such as overpasses disclosed in Japanese Patent No. 3196138 of the prior art (1) owned by the present applicant. Based on the technical idea, a corrugated material (rear plate) and end plates, which are its components, form a box-shaped container with an open lower surface, and the container is filled with a sound absorbing material, and a plurality of open lower surfaces are provided. To provide a unit type louver system for a backside sound absorbing board of an elevated road, which is a unit in which a plurality of louvers are arranged and which is configured to be able to suspend and support the back surface of the backboard to a base material on the backside of the elevated road by a hanging means. Is.

[0011]

As a means for solving the above-mentioned problems, in the unit type louver system for a backside sound absorbing board of an elevated road according to the invention described in claim 1, the back plate is a longitudinal direction of its back surface. Has side walls formed by bending downward on both sides, and there is no side wall on the short side, or a part of the side wall is formed by bending to a small width, and is formed in a downward groove shape as a whole. That is, the end plate forming the side wall of the short side of the back plate has a length equal to the side of the short side, and the side walls formed on both sides of the back plate in the longitudinal direction. It is formed at the same height as the part,
That the joining portion with the back plate is integrally connected, that the sound absorbing material is filled in a box-shaped container having an open lower surface formed by the back plate and the end plate, A plurality of louvers are attached via a plurality of louver holding members fixed to the lower surface of a box-shaped container having an open lower surface formed with end plates, and the rear surface of the rear plate is the rear surface of an elevated road. It is characterized in that it is suspended and supported by the suspending means on the base material.

According to a second aspect of the present invention, in the unit type louver system for the backside sound absorbing plate of an elevated road according to the first aspect, one or a plurality of groove shapes are formed by bending the rear surface of the rear plate so as to bulge downward. Part of the sound absorbing material filled in the box-shaped container formed by the back plate and the end plate, the upper surface of the sound absorbing material is brought into contact with the lower bottom surface of the groove portion, and the upper surface and the back surface of the sound absorbing material. A gap is secured between the groove and the groove, the hanging metal fitting is installed in the groove of the groove-shaped portion, and the upward bolt whose head is supported by the hanging metal fitting is used as a hanging means to the base material on the rear surface of the elevated road. It is characterized in that it is suspended and supported, and both ends of the groove portion of the back plate are closed by end plates.

According to a third aspect of the present invention, in the unit type louver system for a backside sound absorbing plate of an elevated road according to the first aspect, a hanging metal fitting is installed on a flat back surface of the back plate,
It is characterized in that an upward bolt whose head is supported by the suspension fitting is used as suspension means to suspend and support the base material on the rear surface of the elevated road.

According to a fourth aspect of the present invention, in the unit type louver system for the backside sound absorbing board of an elevated road according to the second or third aspect, the hanging metal fitting uses a hollow portion formed in a lower half portion of the hanging metal fitting to form a rear plate. Is bolted to the bottom surface of the groove-shaped portion, and the upper half portion has a slide groove having a convex cross section for slidably supporting the shaft portion and the head of the upward bolt. .

According to a fifth aspect of the invention, in the unit type louver system for the backside sound absorbing board of an elevated road according to any one of the first to fourth aspects, a fall prevention wire is passed through the upper surface of the rear surface of the rear plate. It is characterized in that a hanging metal fitting having a hole is installed so as to be able to rise and fall via a hinge.

According to a sixth aspect of the present invention, in the unit type louver system for the backside sound absorbing board of an elevated road according to any one of the first to fifth aspects, the upper part of the louver is bolted to the horizontal side of the angle which is the louver holding material. The louver is suspended and supported by fixing the angle to the lower surface of the box-shaped container which is stopped and is formed by the back plate and the end plate and whose lower surface is open, and is filled in the same box-shaped container. The sound absorbing material is supported by the louver or the like.

According to a seventh aspect of the present invention, in the unit type louver system for the backside sound absorbing board of an elevated road according to any one of the first to sixth aspects, the side wall portions formed on both sides in the longitudinal direction of the back plate are under the side wall portions. The lips are formed by bending the edges inward almost horizontally, and both ends of the louver holding material are placed and fixed on the lip portions, and the sound absorbing material is also placed and supported on the lip portions. It is characterized by being.

According to an eighth aspect of the present invention, in the unit type louver system for an elevated road rear surface sound absorbing plate according to any one of the first to seventh aspects, the louver is a hollow member having an opening on the upper surface, and the upper surface thereof is an upper surface. Between the lips formed by bending downward in a short direction in the center of the portion to be formed substantially parallel to each other, there is formed a blow-through opening, and a hanging member hooked and fixed to the lower edges of the louvers on both sides of the louver, and a hanging member of the hanging member. It is characterized in that a bolt, which is provided at the center and is raised upward through the blow-through opening, is passed through a bolt hole of the louver holding member, and a nut is tightened from above to be attached to the louver holding member.

According to a ninth aspect of the present invention, in the unit type louver system for a backside sound absorbing board of an elevated road according to any one of the first to eighth aspects, the louver has an inverted trapezoidal cross-sectional shape having an opening on the upper surface. The upper part of the hollow part is formed by bending the upper ends of both side walls substantially horizontally inward, and the gap between the lips formed by bending the upper part of the upper part at the center longitudinal direction downwardly in a short direction is almost parallel. It is characterized in that it is formed in the opening.

According to a tenth aspect of the present invention, in the unit type louver system for an elevated road back surface sound absorbing plate according to any one of the first to ninth aspects, a predetermined aperture ratio is provided on each surface of the louver except for an upper surface portion thereof. The sound absorbing hole is formed so that

The invention according to claim 11 is the invention according to claims 1 to 10.
In the unit type louver system for the backside sound absorbing board of the elevated road described in any one of the above, in the longitudinal intermediate portion of the box-shaped container with the lower surface opened formed by the rear plate and the end plate, the longitudinal direction of the rear plate is It is characterized in that a flat plate-shaped intermediate width stop member for connecting the lower ends of the side wall portions formed on both sides is provided.

The invention according to claim 12 is the invention according to claims 1 to 11.
In the unit type louver system for the backside sound absorbing board of the elevated road described in any one of the above, the louver holding material is fixed to both end portions and the middle portion of the back plate in the longitudinal direction, and the sound absorbing material holds the louver in the middle portion. It is characterized in that it is filled in a box-shaped container which is composed of a plurality of parts divided at the position of the material and which is formed by a back plate and an end plate and whose lower surface is opened.

The invention according to claim 13 is the invention according to claims 1 to 12.
In the unit type louver system for the backside sound absorbing board of an elevated road described in any one of 1, the louver holding material in the middle has a Z-shaped cross section, the louver is attached to the lower flange, and the upper flange is the back plate. It is characterized by being fixed to the back part.

According to a fourteenth aspect of the present invention, in the unit type louver system for a backside sound absorbing plate of an elevated road according to any one of the first to sixth aspects, a bolt for connecting a side wall portion of the rear plate and an end plate, The bolt hole of the end plate through which the bolt that connects the end plate and the louver holding member is inserted has a countersink formed in a tapered shape that narrows inward from the outer surface of the end plate. The head fits into the above-mentioned countersink and stops, and the end face is formed into a flat-shaped countersunk head that is substantially flush with the outer surface of the end plate. It is characterized in that the nut is tightened for connection.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, referring to the drawings,
An embodiment of a unit type louver system for an elevated road back surface sound absorbing plate according to the invention described in any one of claims 1 to 14 will be described.

The back plate 1 which also serves as a corridor is made of a galvanized steel plate (including a corrugated steel plate) having a plate thickness of about 1 mm, and as shown in FIG. 1, both sides of the back part 1a in the longitudinal direction. To
It has a side wall portion 1b formed by bending downward at a substantially right angle. The lower edge of the side wall 1b is inwardly almost horizontal (at a right angle)
The lip portion 1d is also formed by bending (the invention according to claim 7).

The size of the back plate 1 is usually about 2 m or about 3 m in the longitudinal direction of the back part 1a as the size of the sound absorbing plate unit. The widthwise direction is about 70 cm in common, and the height of the side wall portion 1b is about 110 mm. Although there is no problem even if there is no side wall on the side in the lateral direction of the back plate 1, in the case of the illustrated example, a part 1c of the side wall has a width of about 3 mm.
It is bent to about 0 mm and formed small, and is formed in a downward groove shape as a whole. Incidentally, FIG. 1 shows an embodiment in which the length in the longitudinal direction of the sound absorbing plate unit is as short as about 2 m, and an intermediate width stopper 9 is used.

The side wall on the short side of the back plate 1 is formed by a separately prepared flat plate (band plate) end plate 2. The end plate 2 has the same length as the short side of the back plate 1 and the same height as the side walls 1b formed on both sides of the back plate 1 in the longitudinal direction. The joint portion with the face plate 1 is integrally joined by rivet fastening or the like to be described later to form a box-shaped container having an open lower surface. At both ends of the end plate 2, a flange portion 2a is formed by bending at a right angle so as to be joined to the back plate 1 and is inserted into both side wall portions 1b.
Insert this flange 2a into the inside of each side wall 1b,
The positions shown by small dots in FIG. 1 are joined by riveting or the like. Similarly, the joint portion between the end plate 2 and a part 1c of the side wall formed on the lateral side of the rear plate 1 is also joined by bolting means 3 (or riveting) as shown in FIG. As a result, a strong box-shaped container is formed.

Regarding the bolt fastening means 3,
Although the location is different, it is preferable to carry out as shown in the lower left corner portion of FIG. That is, the bolt hole of the end plate 2 through which the bolt 4 is inserted has a tapered countersink that is inwardly narrowed from the outer surface of the end plate 2. Head of bolt 4
The a is formed into a flat-shaped countersunk head that fits into the plate seat and stops, and the outer end surface thereof is substantially flush with the outer surface of the end plate 2. The bolt 4 is passed through the bolt hole inward, and the nut 5 is tightened from the inside to perform the connection (the invention according to claim 14). In this way, there is no obstacle protruding to the outer surface of the end plate 2, so that when the sound absorbing plate unit is laid on the rear surface of the elevated road in a close relationship with each other, it is possible to closely fit them, which is convenient. is there.

As described above, the sound absorbing material 6 is filled in the box-shaped container which is formed by the back plate 1 and the end plate 2 and whose lower surface is open.

Then, a plurality of louvers 7 are provided on the lower surface of the box-shaped container having the lower surface formed by the back plate 1 and the end plate 2.
Are attached in parallel in the longitudinal direction at regular intervals, and the sound absorbing material 6 is supported by the louvers 7 (see FIG. 2 or FIG. 7). As is clear from FIG. 2, the form in which the plurality of louvers 7 are attached in a parallel arrangement in the longitudinal direction exhibits a regularly arranged aesthetic appearance and is excellent in landscape when viewed from below.

Various types of louvers have been publicly known in recent years, especially in terms of cross-sectional shape, but they are common in that they are hollow members. It is roughly divided into those with sound absorbing holes and those without. The louver 7 shown in the figure is a hollow member having an inverted trapezoidal cross section as disclosed in Japanese Patent No. 3196138 cited in the above-mentioned prior art (1), and has an opening in the longitudinal direction at the center of the upper surface. (Fig. 3).

The upper surface of the louver 7 is formed by bending the upper end of the side wall inwardly substantially horizontally. In the center of the upper surface, lips 7a, 7a bent downwards are short.
Are formed substantially parallel to each other, and a blow-through opening having a width of about 30 mm is opened between the lips 7a, 7a (see also FIG. 1; inventions according to claims 7, 8 and 9). Further, punching holes 7b are provided as sound absorbing holes on almost the entire surface from the lower surface to both side surfaces of the louver 7 so that the opening ratio is about 51% (the invention according to claim 10).

The louver 7 has a sound absorbing hole 7b as described above.
In addition to the above, the opening of the blow-through opening is opened on the upper surface, so that the sound wave is not directly reflected by the louver but is directly absorbed by the sound-absorbing material 6 directly above and has a high sound absorption rate (average oblique sound absorption). A rate of 0.95) can be achieved.

As a means for attaching the louver 7 to the lower surface of the lower open box-shaped container formed by the back plate 1 and the end plate 2 as described above, the louver 7 is fixed to the lower surface of the lower open box-shaped container. A plurality of louver holding materials 8 are used (the invention according to claim 1). In the embodiment of FIG. 1, two louver holding materials 8 are used at both ends of the louver 7, and each louver holding material 8, 8 is fixed to both ends of the back plate 1 in the longitudinal direction. Invention of 12).

As a means for attaching the louver 7 to the louver holding member 8, the above-described form of the upper surface portion of the louver 7 is utilized. That is, in order to make it easy to understand FIG. 3, the V-shaped concave portion 10 hooked on the lower edges of the lips 7a on both sides.
A hanging tool 10 having a symmetrical shape of a and a hanging tool 1
A hanging metal fitting, which is provided in the central portion of 0 and is integrally formed with a bolt 11 rising upward through the blow-through opening of the louver, is preferably used. The concave portion 10a of the hanging tool 10 is hooked on the lower edge of the lip 7a of the louver 7 so that the bolt 11 rises upward through the blow-through opening, the bolt 11 is passed through the bolt hole of the louver holding member 8, and the nut 12 is inserted from above. The mounting is performed by tightening (the invention according to claims 8 and 9).

The louver holding material 8 includes a back plate 1 and an end plate 2.
Attach it to the lower surface of the box-shaped container with the lower surface opened as described below.

As the louver holding material 8, an angle having high rigidity is used. Both ends of the horizontal side are placed on the lip portion 1d formed inward at the lower end of the side wall portion 1b of the back plate 1 as shown in FIG. 3, and the vertical piece comes into contact with the inner side surface of the end plate 2. (Fig. 4). Then, a plurality of positions of the vertical piece are fixed by the end plate 2 and the bolt 4 in the configuration shown in FIG. 4 (the invention according to claim 7).

In particular, the bolt hole of the end plate 2 through which the bolt 4 is passed has a tapered countersunk head which is recessed inward from the outer surface. The head 4a of the bolt 4 is housed in the plate seat and stopped, and the outer end surface of the bolt 4 is formed into a flat plate head that is substantially flush with the outer surface of the end plate 2. The bolt 4 is passed through the bolt hole inward, and also through a bolt hole formed in the vertical piece of the angle 8, and the nut 5 is tightened from the inside to be connected (the invention of claim 14). Therefore, there is no obstacle protruding to the outer side surface of the end plate 2, which is convenient for laying this sound absorbing plate unit on the rear surface of the elevated road in a close relationship with each other.

As shown in FIG. 1, when the length of the sound absorbing member unit is as short as about 2 m, the louver 7 is sufficiently strong when both ends thereof are supported by the two louver holding members 8, 8. It will be installed. Rather, both side wall portions 1b, 1b of the back plate 1 forming the box-shaped container with the lower surface open may be deformed by receiving a vertical load and opening outward. Therefore, a flat plate-shaped intermediate width stop member 9 that connects the lower ends of the side wall portions 1b and 1b to each other is provided at a substantially middle position in the longitudinal direction of the side wall portions 1b and 1b of the back plate 1 (claim 11). Invention). As shown in FIG. 1, the intermediate width stop member 9 has flange portions 9a that are bent upward at both ends thereof. Both ends of the intermediate width stopper 9 have side walls 1b, 1
It is placed on the lip 1d of b, the flange portion 9a is brought into contact with the inner surface of the side wall, and they are joined by means such as riveting. As shown in FIG. 4, the flat plate-shaped intermediate width stopper 9 is used for the louver 7
Crosses the top position of.

On the other hand, as in the embodiment shown in FIG. 9, when the length of the sound absorbing plate unit is as long as about 3 m, the louver holding member 8 is provided in the longitudinal direction in addition to the both ends of the louver 7. One (or more than one) is also used at the intermediate position (the invention according to claim 12). An angle is also commonly used for the louver holding material 8 in the middle portion. As shown in FIG. 9, the angle 8 in the middle portion is provided with flanges 8a, which are formed by bending horizontal sides or vertical pieces at substantially right angles at both ends, and these flanges 8a are provided on the inner surface of both side wall portions 1b of the back plate 1. Contact
It is fixed by means such as riveting. This is for strengthening the support of the louver 7 and preventing inconveniences such as hanging down (see FIG. 10).

When the louver holding material 8 in the middle portion is used, the presence of the louver holding material 8 becomes an obstacle to the filling of the sound absorbing material 6. Therefore, it is assumed that the sound absorbing material 6 is composed of two pieces (or a plurality of pieces in proportion to the number of the louver holding material in the middle portion) divided at the position of the vertical piece of the angle 8 as shown in FIGS. It is packed side by side in a plate shape in a box-shaped container having an open lower surface formed by the back plate 1 and the end plate 2 (the invention according to claim 12).

Regarding the louver holding material in the intermediate portion,
As in the embodiment shown in FIGS. 11 and 12, it is also possible to use a so-called Z-shaped steel material 8 ′ having a Z-shaped cross section.
When this Z-shaped steel material 8'is used, as shown in FIG. 11, the flanges 8b formed by bending both ends of the web substantially at right angles are riveted to the inner surfaces of both side wall portions 1b of the rear plate 1. Besides, the upper flange 8c is fixed to the lower surface of the rear surface of the rear plate 1 by means of rivets or the like (the invention according to claim 13). The louver 7 is attached to the lower flange by means such as bolting (FIG. 12).

The sound absorbing plate unit configured as described above is suspended and supported by the suspending means described below on the base material on the rear surface of the elevated road.

First, as is apparent from FIG. 3, the rear surface 1a of the rear plate 1 is provided with two groove-shaped portions (however, one or more may be formed) bent downward so as to swell in an inverted trapezoidal shape. 13
As an example, the depth is about 30 mm, and the opening width of the upper surface of the groove is about 70 mm. The groove portion 13 has a function of increasing the strength and rigidity of the back surface portion 1a which also functions as a corridor material. Not only that, the upper surface of the sound absorbing material 6 filled in the box-shaped container formed by the back plate 1 and the end plate 2 is brought into contact with the lower bottom surface 13a of the groove portion 13 to press the same, thereby absorbing the sound. It is also useful for securing a space necessary and sufficient for the sound absorbing function between the upper surface of the material 6 and the back surface 1a.

At both ends of the groove of the groove portion 13, hanging metal fittings 15 having a height about the same as the depth of the groove (about 70 mm) and not protruding beyond the upper surface of the back surface 1a are installed. Attaching (suspension support) to the base material 17 (channel material) on the rear surface of the elevated road is performed by using the bolt 24, the head of which is supported by the suspension metal fitting 15 and facing upward, as suspension means (FIG. 4, claim 2). Invention described).

As shown in the enlarged view of FIGS. 8A and 8B, the hanging metal fitting 15 of the illustrated example has a hollow portion 15a formed in a structure (or a non-penetrating structure is possible) penetrating in the longitudinal direction of the lower half thereof.
It is bolted to the lower bottom surface 13a of the groove portion 13 of the rear plate 1 by utilizing. That is, the nut 20 is previously inserted into the hollow portion 15a. Then, the bolt 21 is commonly passed from the lower side to the upper side in the lower bottom portion of the hollow portion 15a and the lower bottom surface 13a of the groove-shaped portion 13 in advance, and is screwed into and coupled to the nut 20. For this reason, the hollow portion 15a is formed in a shape and a size in which the nut 20 can be inserted and slid but not rotated.

In the upper half of the hanging member 15, there is provided a slide groove 15b having a convex cross section for supporting the shaft portion 24a and the head portion 24b of the upwardly directed bolt 24 so as not to rotate. The upward bolt 24, which is supported by passing through the slide groove 15b, is passed through the bolt hole of the base material 17 on the rear surface of the elevated road, and the nut 25 is screwed in from above to attach (suspend and support) (FIG. 4).

According to FIG. 6, the two channels 1 of the back plate 1
3 The installation of one sound absorbing plate unit is completed by bolting the upward bolts 24 of the suspension fittings 15 arranged in total at four positions at the left and right ends. Therefore, on-site work can be performed very easily, quickly and efficiently,
The work period can be shortened.

In the case of the illustrated example, the rear plate 1 is used in consideration of the fact that the sound absorbing plate unit is attached to the base material 17 on the rear surface of the elevated road, which is several meters above the ground, as work at a high place. Both ends of the groove 13 are closed by the end plates 2 (FIG. 8B, invention of claim 2). Bolts 21, 24 or nuts 20, 2 during installation work
This is for the purpose of preventing accidents in which 5 spills from the operator's hand and falls from both ends of the grooved portion 13.

As a safety measure to further complement the suspension support by the bolts 24 described above, a plurality of locations (two in FIG. 6) and the fall prevention wire 2 are provided on the upper surface of the rear surface 1a of the rear plate 1.
7 is a hinge 26b.
It is installed so that it can be raised and lowered via (Fig. 3).
Invention described). Each sound absorbing plate unit is hung and supported on the base material 17 in the above-described manner, and the fall prevention wire 27 is passed through the hole 26a of the hanging metal fitting 26 to prevent an unexpected accident. Hanging fitting 2 installed by hinge 26b
When transporting or storing the sound absorbing plate unit 6, the suspension metal fitting 6 can be stacked by tilting the hanging metal fitting 26 flat at the position of the hinge 26b, which is efficient.

The unit louver system for a sound absorbing plate according to the present invention is not limited to being applied to the rear surface of an elevated road, but can be applied to the rear surface of an elevated railway or viaduct which requires similar measures.

[0053]

EFFECTS OF THE INVENTION The unit type louver system for the backside sound absorbing board of an elevated road according to the invention described in claims 1 to 14 has a simple structure, there are no custom-made components, and it is relatively easy to process and inexpensive. Can be manufactured. Moreover, the attachment of the backside of the elevated road to the base material can achieve the purpose by bolting with a small number of bolts of about four per unit, which contributes to a reduction in the number of on-site work steps. Sufficient consideration is given to on-site installation work and ensuring safety during service.

[Brief description of drawings]

FIG. 1 is an exploded cross-sectional view of respective constituent members of a sound absorbing plate unit louver system according to the present invention.

FIG. 2 is a perspective view showing the sound absorbing plate unit according to the present invention as seen from below.

3 is an enlarged cross-sectional view taken along the line III-III of FIG.

4 is a cross-sectional view taken along the line VI-VI of FIG.

FIG. 5 is a front view of the sound absorbing plate unit according to the present invention.

FIG. 6 is a plan view of the sound absorbing plate unit.

FIG. 7 is a bottom view of the sound absorbing plate unit.

8A and 8B are a side view and a cross-sectional view in a front direction showing, in an enlarged manner, a usage state of a hanging fitting.

FIG. 9 is a cross-sectional view showing each constituent member of a different unit louver system for sound absorbing plates in an exploded manner.

10 is a cross-sectional view showing the sound absorbing plate unit from the same viewpoint as FIG.

FIG. 11 is a cross-sectional view showing each constituent member of a different unit louver system for a sound absorbing plate in an exploded manner.

12 is a cross-sectional view showing the sound absorbing plate unit from the same viewpoint as FIG.

[Explanation of symbols]

1 Back plate 1a rear part 1b Side wall 1c Side wall part 2 end plate 6 sound absorbing material 7 louvers 8,8 'Louver holding material 9 Intermediate width stopper 24 bolts (suspension means) 13 Groove 13a lower bottom surface 15 Hanging bracket 17 Base material 15a cavity 21 bolts 15b slide groove 27 Fall prevention wire 26a hole 26 Hanging bracket 26b hinge 1d lip part 7a lip 10 hanging equipment 11 Volts 12 nuts 4 volt 4a bolt head 5 nuts

Claims (14)

[Claims] 1. A back plate has side walls formed by bending downward on both sides in the longitudinal direction of the back part, and there is no side wall in the lateral direction or a part of the side wall has a small width. It is formed by bending and is formed in a downward groove shape as a whole, and the end plate forming the side wall of the side in the lateral direction of the back plate is,
It has the same length as the side in the lateral direction and the same height as the side wall portions formed on both sides in the longitudinal direction of the back plate, and integrally joins the joint portion with the back plate. That the sound absorbing material is filled in a box-shaped container having an open lower surface formed by the back plate and the end plate, and a lower surface opened by the back plate and the end plate. A plurality of louvers are attached via a plurality of louver holding materials fixed to the lower surface of the box-shaped container, and the rear surface of the back plate is suspended and supported by a suspending means on a backing material on the rear surface of the elevated road. The unit type louver system for the sound absorbing board on the backside of the elevated road, each of which is characterized by 2. A box-shaped container formed by a back plate and an end plate, wherein one or a plurality of groove-shaped parts are formed by bending the back part of the back plate so as to bulge downward. The filled sound-absorbing material has its upper surface in contact with the lower bottom surface of the groove portion so that a gap is secured between the upper surface and the back surface of the sound-absorbing material, and a hanging metal fitting is provided in the groove of the groove portion. Suspended and supported on the base material on the backside of the elevated road by using the upward bolts, which are installed and whose heads are supported by the suspension fittings, as the suspending means, and both ends of the groove portion of the rear plate are closed by end plates. The unit type louver system for the backside sound absorbing board of an elevated road according to claim 1, characterized in that. 3. A hanging metal fitting is installed on a flat rear surface of the rear plate, and the upward supporting bolt whose head is supported by the hanging metal fitting is used as a hanging means for hanging and supporting the base material on the rear surface of the elevated road. The unit type louver system for the backside sound absorbing board of an elevated road according to claim 1. 4. The hanging metal fitting is bolted to the bottom surface of the groove portion of the back plate by utilizing the hollow portion formed in the lower half portion of the hanging metal fitting, and the shaft portion of the bolt facing upward and the upper half portion. The unit type louver system for a backside sound absorbing board of an elevated road according to claim 2 or 3, characterized in that the head has a slide groove having a convex cross section for slidably supporting the head. 5. A hanging metal fitting having a hole through which a fall prevention wire is inserted is movably installed via a hinge on the upper surface of the rear surface of the rear plate. The unit type louver system for the backside sound absorbing board of the elevated road described in any one of the above. 6. The louver is secured to the lower surface of a box-shaped container whose lower surface is opened by bolting the upper portion of the louver to the horizontal side of the angle, which is a louver holding material, and is formed by the back plate and the end plate. The louver is suspended and supported by doing so, and the sound absorbing material filled in the box-shaped container is supported by the louver or the like.
A unit type louver system for the backside sound absorbing board of an elevated road according to any one of 5 to 5. 7. A lip portion is formed by bending the lower edges of side wall portions formed on both sides in the longitudinal direction of the back plate inwardly and substantially horizontally, and both end portions of the louver holding material are above the lip portion. 7. The unit type louver for the backside sound absorbing board of an elevated road according to any one of claims 1 to 6, characterized in that the sound absorbing material is placed on and fixed to the lip portion, and the sound absorbing material is also placed and supported on the lip portion. system. 8. A louver is a hollow member having an opening on its upper surface, and a gap formed between the lips formed by bending downward downward in the center of the upper surface portion and being substantially parallel is formed in the blow-through opening portion. A suspender hooked and fixed to the lower edges of the lips on both sides, and a bolt provided upward at the center of the suspender and raised upward through the blow-through opening are passed through the bolt holes of the louver holding member, and The unit louver system for an elevated road back surface sound absorbing plate according to any one of claims 1 to 7, wherein the nut is tightened and attached to the louver holding material. 9. The louver is an inverted trapezoidal hollow member having a cross-sectional shape having an opening on the upper surface, and the upper surface portion is formed by bending the upper ends of both side wall portions substantially horizontally inward. 9. The sound absorbing board on the rear surface of the elevated road according to claim 1, characterized in that gaps between the lips that are formed by bending downward in the longitudinal direction of the center of the ridge and are formed substantially parallel to each other are formed in the blow-through opening. Unit type louver system. 10. An elevated road according to any one of claims 1 to 9, characterized in that sound absorbing holes are formed in each surface of the louver excluding the upper surface portion so as to have a predetermined opening ratio. Unit type louver system for back side sound absorbing board. 11. A lower end of side wall portions formed on both sides in the longitudinal direction of the back plate is connected to an intermediate portion in the longitudinal direction of a box-shaped container having an open lower surface formed by a back plate and an end plate. Characterized in that a plate-shaped intermediate width stopper is provided,
A unit louver system for a backside sound absorbing plate of an elevated road according to any one of claims 1 to 10. 12. A louver holding material is fixed to both ends and a middle portion of the back plate in the longitudinal direction, and the sound absorbing material is composed of a plurality of pieces divided at the position of the louver holding material in the middle portion. The unit type louver system for the backside sound absorbing board of an elevated road according to any one of claims 1 to 11, which is filled in a box-shaped container having an open lower surface formed by an end plate and an end plate. . 13. The louver holding member in the middle portion has a Z-shaped cross section, the louver is attached to the lower flange of the louver holding member, and the upper flange is fixed to the back portion of the back plate. A unit type louver system for an elevated road back surface sound absorbing plate according to any one of claims 1 to 12. 14. A bolt hole for connecting a side wall portion of a rear plate and an end plate, and a bolt hole for an end plate through which a bolt connecting an end plate and a louver holding member are inserted, the outer surface of the end plate being the same. Has a tapered countersunk head, the head of the bolt fits into the counterhead and stops, and the end surface is flat with the outer surface of the end plate. The elevated road according to any one of claims 1 to 6, wherein the elevated road is formed on the head, and the bolt is inwardly inserted into the bolt hole and a nut is tightened from the inner side for connection. Unit type louver system for back side sound absorbing board.