JP3721248B2 - Underwater sound absorbing wedge structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of an underwater sound absorbing wedge, and more specifically, a part of the underwater sound absorbing wedge is provided with rigidity so as not to fall down when mounted on a wall so that the sound absorbing performance is not affected. It relates to the structure of the wedge.
[0002]
[Prior art]
Conventionally, sound-absorbing wedges used to reduce underwater noise in aquariums or ships are roughly classified into wooden wedges made of pine trees, etc., and rubber wedges made of rubber-like elastic materials such as rubber or resin. ing.
As shown in FIGS. 3A and 3B, the rubber wedge 1 is formed with a plurality of cylindrical pores 3 in a rubber layer 2 formed in a plate shape, and is deformed by the energy when a sound wave arrives. And, as shown in FIGS. 4 (a) and 4 (b), with a structure that absorbs the energy of sound waves, a fine hollow sphere 4 of soft resin is blended in the rubber layer 2 formed in a plate shape, Some of them absorb energy by deformation near the minute hollow sphere 4.
[0003]
[Problems to be solved by the invention]
However, in any case, although depending on the target frequency, the height H of the rubber wedge 1 is usually required to be 200 mm to 400 mm, and when absorbing energy by deformation, the rubber hardness is A JISA hardness of 50 to 60 is suitable.
However, with such a rubber hardness, although depending on the thickness of the rubber wedge 1, there is a tendency that it tends to fall down by its own weight when it is mounted on the wall surface, which affects the sound absorption performance.
[0004]
An object of the present invention is to provide a structure of an underwater sound absorbing wedge which prevents the tip side from falling when the wall surface of the underwater sound absorbing wedge is attached, so that the sound absorbing performance is not affected.
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention comprises an underwater sound absorbing wedge body made of a soft rubber compounding material, and a rigid material made of a hard rubber compounding material is disposed around or in the longitudinal direction of the underwater sound absorbing wedge body. The gist is that it was molded .
Here, while the rubber hardness of the underwater sound absorbing wedge body is JISA hardness 50-60, the rubber hardness of the rigid material disposed around or in the longitudinal direction of the underwater sound absorbing wedge body is JISA hardness 80-90. Further, the mounting member is made of a hard rubber compounding material, and is integrally formed when the underwater sound absorbing wedge body is formed.
With this configuration , the sound absorption performance is not affected by preventing the tip side from falling when the wall surface of the underwater sound absorbing wedge is attached.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
Note that the same components as those in the conventional example are denoted by the same reference numerals and description thereof is omitted.
1A and 1B show a front view and a cross-sectional view of the underwater sound absorbing wedge body 1 according to the first embodiment of the present invention, and the underwater sound absorbing wedge body 1 has a cylindrical shape inside. The rubber sheet 5a made of a soft rubber compounding material having a plurality of pores 3 and a rubber sheet 5b integrally formed so as to seal the pores 3 are formed around the underwater sound absorbing wedge body 1. The rigid material 6 made of a hard rubber compounding material is integrally formed by a vulcanization press or the like.
[0007]
When the underwater sound absorbing wedge body 1 is attached to the wall surface of the substrate 7, as shown in FIG. 1 (b), an L-shaped attachment member 8 sandwiches the proximal end portion 1a of the underwater sound absorbing wedge body 1 with a bolt. It fixes by the fastening members 9, such as.
The width of the rigid member 6 is preferably 10 mm when the underwater sound absorbing wedge body 1 has a normal height H, width L, and thickness t (200 mm to 400 mm, 150 mm, 5 mm). About 10% of the cross-sectional area is preferable. Further, the rubber hardness of the underwater sound absorbing wedge body 1 is JISA hardness 50-60, whereas the rubber hardness of the rigid material is JISA hardness 80- 80 for the purpose of preventing falling due to its own weight. 90 is preferred.
[0008]
2 (a) and 2 (b) show a front view of the underwater sound absorbing wedge body 1 and a cross-sectional view taken along the line BB in the second embodiment of the present invention, and the side edges of the underwater sound absorbing wedge body 1 in the longitudinal direction. A rigid material 6 similar to that of the first embodiment is linearly provided only at the portion, and is integrally formed.
In the first embodiment and the second embodiment, the plurality of columnar pores 3 are formed inside the underwater sound absorbing wedge body 1. However, the present invention is not limited to this embodiment. It is also possible to mix and constitute soft micro hollow spheres.
[0009]
Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.
In consideration of the mounting structure of the underwater sound absorbing wedge body 1, the L-shaped mounting member 8 is also made of a hard rubber compounding material similar to the rigid material 6 when the mounting structure including measurement is used. By integrally forming the main body 1 at the same time, work such as post-bonding becomes unnecessary.
[0010]
As described above, in each embodiment of the present invention, when the underwater sound absorbing wedge body 1 is vertically attached to a horizontal substrate 7 or attached to a substantially vertical wall surface or the like in a direction orthogonal thereto, the tip of the underwater sound absorbing wedge body 1 is provided. By configuring so that 1b can stand on its own without being bent by its own weight, the performance as an underwater sound absorbing material can be maintained.
[0011]
1A, 1B, and 2A, 2B, the configuration of the single underwater sound absorbing wedge body 1 has been described. However, a number of peaks are continuous. It is also possible to apply to an underwater sound absorbing wedge body. In this case as well, a rigid material made of a hard rubber compounded material around a rubber sheet made of a soft rubber compounded material in which a plurality of cylindrical pores are formed inside. By integrally forming, effects similar to those of the above embodiment can be obtained.
[0012]
【The invention's effect】
According to the present invention, the underwater sound absorbing wedge body is composed of a soft rubber compounding material as described above, and a rigid material made of a hard rubber compounding material is disposed integrally with the underwater sound absorbing wedge body around or in the longitudinal direction. Since it has been molded, it is possible to prevent the tip side from falling when the underwater sound absorbing wedge is attached to the wall surface, and it is possible to always maintain the sound absorbing performance as the underwater sound absorbing wedge.
[Brief description of the drawings]
FIGS. 1A and 1B are a front view and an AA arrow sectional view of an underwater sound absorbing wedge body according to a first embodiment of the present invention.
FIGS. 2A and 2B are a front view and an BB arrow sectional view of an underwater sound absorbing wedge body according to a second embodiment of the present invention.
FIGS. 3A and 3B are a front view and a side view of a conventional underwater sound absorbing wedge body, respectively.
4A and 4B are a front view and a side view of another conventional underwater sound absorbing wedge body, respectively.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Underwater sound absorption wedge main body 1a Base end part 1b of underwater sound absorption wedge main body 3 Tip part of underwater sound absorption wedge main body 3 Pore part 5a Rubber sheet 5b Rubber sheet 6 Rigid material 7 Substrate 8 Mounting member 9 Fastening member

Claims (3)

In the structure of the underwater sound absorbing wedge formed by fixing the base end portion of the underwater sound absorbing wedge body made of a rubber-like elastic body to the substrate via an attachment member,
The underwater sound absorbing wedge body is made of a soft rubber compounding material, and a rigid material made of a hard rubber compounding material is disposed around or in the longitudinal direction of the underwater sound absorbing wedge body and integrally molded. Structure. Rubber hardness of the water absorbing wedge body, whereas a JISA hardness of 50 to 60, the rubber hardness of the rigid material to be disposed around or longitudinal water absorbing wedge body is a JISA hardness 80-90 according Item 2. The underwater sound absorbing wedge structure according to Item 1 . The underwater sound absorbing wedge structure according to claim 1 or 2, wherein the mounting member is formed of a hard rubber compounding material and is integrally formed when the underwater sound absorbing wedge body is formed.

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