JPH086809Y2 - Outdoor soundproof wall structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a sound absorbing outdoor soundproof wall structure installed on a road or along a railway.

<Prior Art> As shown in FIG. 6, a conventional road and railroad soundproof wall 1 has a perforated plate on the front surface of a rear plate 2 that constitutes a soundproof wall and has a sound absorbing material 1a inside. 3 was manufactured separately, and it was attached to a C-channel type outer frame (not shown) with rivets 4 and the like.

<Problems to be Solved by the Invention> The conventional soundproof wall has a large number of assembly members and a large number of steps such as drilling and riveting, which has been a cause of cost increase of the soundproof wall.

In view of such a point, the object of the present invention is to reduce the labor cost most in the cost reduction in manufacturing the soundproof wall. Therefore, the number of assembly members is reduced, and the drilling process and the riveting process are performed. It is intended to reduce the unit price of the noise barrier and to strengthen the market response by shortening the production period.

Another problem is that road noise barriers need to be considered for protection against car noise barrier collisions. In order to prevent the members from falling apart and falling under the viaduct, it is safer in principle that each member is passed through the fall prevention wire without a joining means such as a rivet.

From this point, since the front perforated plate of the conventional soundproof wall is riveted, there is a possibility that the rivet may come off due to a collision of a vehicle and drop, which is a safety problem. In other words, since the present invention is dangerous when a soundproof wall is made by sticking various members together, a cross-sectional structure of the soundproof wall is configured with a single member to improve safety in a vehicle collision accident. is there.

<Means for Solving the Problems> In order to achieve the above object, if a sound absorbing box having a single structure is provided by using an endless member having an opening on the outer periphery where noise enters, it is not necessary to rivet the member. I found that. That is, as a basic box structure, it has one independent sound absorbing chamber inside, and has one noise absorbing opening continuous on the noise generating source side over the entire width so as to communicate with this sound absorbing chamber. If a basic C-shaped section is set and this basic box structure is integrally molded, rivet fixing is not required.

Such a sound absorbing box can be easily manufactured by extrusion or pultrusion molding method in plastic similarly to an endless member having an equal cross section like a pipe or the like. Using this basic box structure as one unit, a long endless member having a cross section having a shape in which one or a plurality of the basic box structures are integrated is manufactured, and the endless member is cut into a required length to obtain a sound absorbing box. Then, a sound absorbing body having a required height is formed by inserting a sound absorbing body into the sound absorbing chamber of the sound absorbing box and stacking the plurality of sound absorbing boxes with the sound absorbing body in a vertically connected manner.

<Operation> If this sound absorbing box is block-stacked between the soundproof wall columns and set at a required height, a soundproof wall that does not require rivet fixing is formed. In this soundproof wall, since the sound absorbing box uses the endless member manufactured by the extrusion or pultrusion molding method, the length of the scale piece can be appropriately selected.

Further, since there is only one opening in the basic box structure having a C-shaped cross section, and each opening is also blocked by the partition wall in the sound absorbing box, it is possible to provide a high rigidity.

<Example> Hereinafter, the present invention will be described with reference to the drawings.
FIG. 1 is a list of three types of sound absorbing boxes each having a single basic box structure among the sound absorbing boxes which are basic structural units of the soundproof wall structure according to the present invention. These sound absorbing boxes 5 have one independent sound absorbing chamber 6 inside, and one noise absorbing opening 7 continuous across the entire width on the noise generating source side so as to communicate with the sound absorbing chamber 6. Basic box structure 8 having an approximately C-shaped cross section
Is set, and the basic box structure 8 is integrally formed by extrusion or drawing of plastic. A sound absorber 9 is inserted in the sound absorbing chamber 6 of the sound absorbing box 5.

The sound absorbing box 5 has a 10 to 40% open area 7 on the front surface of the sound source side to allow noise to enter the total area of the front surface. It will be the larger of the acoustic design thicknesses to ensure.

The sound absorbing body 9 is made by packing a sound absorbing material such as glass wool in a bag made of vinyl or the like, avoiding direct sunlight in the summer, putting the sound absorbing body in the back a little, and providing the sunshade function to the box itself. It blocks strong direct sunlight.

In FIG. 1A, ribs 10 and 11 are formed on the upper and lower sides of the opening 5, and the upper rib 10 of these ribs is projected outward and the lower rib 11 is retracted inward. In the figure (B), the rib 11 is formed only on the lower side of the opening. Further, in the figure (C), ribs 10 and 11 are provided above and below the aperture, and these are retracted inward, and these ribs 10 and 11 increase the direct sunlight blocking function.

FIG. 2 shows a basic structure of the sound absorbing box, in which two basic box structures 8 are combined vertically. Furthermore, FIG. 3 shows an example in which four basic box structures 8 are vertically aligned to form a one-piece sound absorbing box. Also in these sound absorbing boxes, there is one opening 7 for each basic box structure 8 having a C-shaped cross section, and each opening is also blocked by the partition wall 8a that constitutes the basic box structure 8 in the sound absorbing box. It has been configured.

FIGS. 1 (A), (B), and (C) are examples in which a sound absorbing box of one member is configured by a basic box structure of one element.
It is necessary to judge how many elements a basic box structure will be manufactured as one member in consideration of the following points.
That is, as the number of elements molded by one member increases, the material cost and the number of blocks to be stacked decrease, but the mold cost increases, and the factories that can manufacture large cross sections are limited. Therefore, the size of the cross section of one member may be determined from the viewpoint of the overall cost considering the shipping amount. On the other hand, recently, many soundproof wall columns with rounded walls and the entire shape of the soundproof wall have been constructed,
A cross section having a smaller curve followability is more preferable, and the size of the member cross section is limited due to the strength of the radius.

FIG. 4 shows a case in which a partition wall 12 is placed in an open-section box to improve torsional rigidity. Plastic has a very small elastic modulus, and the open cross-section member is easily deformed. However, if the partition wall 12 is used to form the box structure 13 on the back side,
The torsional rigidity of the whole is remarkably increased, and if it is a soundproof wall made of plastic, it can be used as a structural member.
The sound absorbing box 5 containing the partition wall 12 also has an equal cross-sectional shape and can be easily manufactured by extrusion or drawing of plastic.

Here, the sound absorbing box made of plastic is used.If a sound insulating wall made of metal is used, since these blocks and reflects radio waves, radio interference occurs mainly in the television. Since plastic transmits radio waves, a soundproof wall made of a plastic material is most suitable for locations where radio interference occurs. However, when the sound absorbing box made of plastic has a large cross-section structure, the rigidity is inferior to that made of metal, so that it is desirable to provide reinforcing ribs everywhere in consideration of this rigidity.

FIG. 5 shows an example in which a sound absorbing wall for a road is constructed by using a sound absorbing box integrally formed by vertically connecting two basic box structures out of the present invention, and stacking the sound absorbing boxes between the columns 14 in eight steps. In the case of stacking between the I-shaped steel or H-shaped steel columns 14, there is a great effect in that rivet fixing is unnecessary.

<Effects of the Invention> As described in detail above, according to the present invention, the sound absorbing box has the same cross section in every part, and the sound absorbing box can be easily formed by extrusion or drawing of plastic, and the sound absorbing wall is riveted. Stopping is unnecessary, and safety can be improved. Moreover, since the endless member is used, even an end product can be easily manufactured, and the overall manufacturing cost can be reduced.

Further, even when the sound absorbing box itself is configured by vertically connecting a plurality of basic block structures, since the back wall and the front wall are connected by the partition wall of the block structure, the width direction is wide. It is possible to provide a structure having high rigidity even if it has a structure having an opening. Further, since the sound absorbing box is made of plastic, it is possible to provide a good soundproof wall as a measure against electromagnetic interference.

[Brief description of drawings]

1 (A), (B) and (C) are sectional views showing a sound absorbing box composed of a single basic box structure of the present invention, and FIG. 2 is a sectional view showing a sound absorbing box composed of two basic box structures. FIG. 3 is a sectional view showing a sound absorbing box which is also composed of four basic box structures, FIG. 4 is a sectional view showing a sound absorbing box having a partition wall on the back side, and FIG. 5 is an on-site construction using the sound absorbing box. A front view of a soundproof wall showing an example, No. 6
The figure is a conceptual diagram of assembly of a conventional soundproof wall. 5 …… Sound absorbing box 6 …… Sound absorbing chamber 7 …… Opening 8 …… Basic box structure 8a …… Differential partition 9 …… Sound absorbing body

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-51-41217 (JP, A) JP-B-52-13007 (JP, B2) JP-B-57-8077 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. An equal cross section C having an independent sound absorbing chamber inside and having a noise absorbing opening continuous to the noise generating source on the side of the noise generating source over the entire lateral width. The basic box structure of the character shape is provided with a sound absorbing box integrally formed by extrusion or drawing of plastic in the form of single or plural continuous up and down, and the sound absorbing body is inserted into the sound absorbing chamber of this sound absorbing box. An outdoor soundproof wall structure in which a soundproof wall of the required height is formed by connecting multiple sound absorbing boxes with the upper and lower parts.