JPH01235710A - Underwater oscillation-proofing and sound arresting base - Google Patents

Abstract

PURPOSE:To display effective functions of oscillation-proofing and sound arresting with simple construction in spite of water pressure even in water by providing subdivided pressure resistance air-bags between a wave receiver and a base. CONSTITUTION:Bearing member 2a and 2b are loaded in opposite directions to a base 1 such as a stand used underwater or the hull and others, and the ends of a surface plate 5 provided with a wave receiver 4 are mounted on the tips of the bearing members 2a and 2b through springs 3a and 3b. A plurality of subdivided pressure resistance air-bags 10 are filled into a space (X) between the base 1 and surface plate 5 so as to fill up the space (X). Air is enclosed in each of the pressure resistance air-bags 10 at maximum pressure so that air volume remains unchanged from beginning. Such pressure resistance air-bags 10 that a plurality of braided hoses with a specific diameter are placed in multistage in the direction at right angles or that are formed in the shape of a sphere are used.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an underwater vibration-proof and sound-insulating stand, and more particularly to an underwater vibration-proof and sound-insulating stand whose vibration-proofing and sound-insulating functions are effectively activated underwater. It is.

[Prior art]

In general, receivers of underwater acoustic equipment used on ships etc. need to be installed on a vibration isolating stand having a sound insulation function in order to avoid the effects of vibrations and radiated sound from the ship's body.

The surface plate that makes up the anti-vibration mechanism is supported by springs, but when used underwater, the springs no longer function due to the influence of water between the surface plate and the hull, and the anti-vibration mechanism will no longer hold true. Additionally, there is a problem in that sound waves are transmitted from the hull to the surface of the top plate through this water and interfere with the wave receiver on the top plate.

By the way, as a vibration isolation mechanism conventionally used for boat fishing, for example, as shown in FIG. 2, a pair of opposing support members 2 (support Both ends of a surface plate 5 on which a wave receiver 4 is installed are attached to the metal fittings via springs 3 such as springs.

The vibration of the base 1 is transmitted to the spring 3 through the support member 2, but when the surface plate 5 supported by the spring 3 is operated in the atmosphere, the vibration of the base 1 is transmitted to the spring 3 through the support member 2. At this frequency, the vibration transmissibility becomes a predetermined value, and the vibration of the base 1 is reduced. However, when operating underwater, the top plate 5 is supported by two elastic members: the spring 3 and the water between the top plate 5 and the base 1; Since the water between the base 1 and the base 1 can be thought of as a hard spring, the synthetic spring is equivalent to a very hard spring.

Therefore, the vibration isolation mechanism that supports the top plate 5 does not operate due to the above-mentioned influence.

In this state, it is possible to remove the influence of water by making the surface plate 5 mesh-like and allow the mechanism to operate normally, but the sound waves emitted from the base 1 may pass directly through the intermediate water. It is difficult to reach the surface plate 5 and achieve the desired vibration isolation and sound insulation at the same time.

In addition, as another conventional vibration isolation mechanism, as shown in FIG. 3, a flat hollow tube 6 having a spring function is wrapped in a viscoelastic body 7 such as rubber, and A structure in which a surface plate 8 is attached to a base plate 9 and mounted on a base plate 9 is known.

This conventional vibration isolation mechanism does not pose any particular problem when used in a place with low water pressure, but when used under high water pressure, the flat hollow tube 6 must be made hard to withstand the water pressure during design. Therefore, there was a problem in that the structure for high water pressure tends to be large and heavy. Furthermore, there is also the problem that the flat hollow tube 6 will break under water pressure exceeding the design value.

[Purpose of the invention]

This invention was devised by focusing on such conventional problems, and its purpose is to have a simple structure, simplifying the assembly process, and improving the sound insulation effect at a large depth. We have created an underwater vibration-proof and sound-insulating table that can improve the vibration and sound insulation effect even after the air bladder contracts due to an increase in external pressure, and can maintain a uniform sound insulation effect even when the air bladder contracts due to an increase in external pressure. This is what we provide.

[Structure of the invention]

In order to achieve the above-mentioned object, the present invention attaches the ends of the surface plate on which the wave receiver is installed to opposing support members attached to the base plate via springs, and connects the base plate with the base plate. By filling the space with segmented pressure-resistant air bags, the influence of water is reduced, allowing the vibration isolation mechanism to operate normally without restricting the vibration of the surface plate, and further reducing the amount of radiation radiated from the base. The gist of this device is to prevent sound waves from being transmitted to the surface plate by the air bladder, thereby effectively exhibiting the vibration-proofing and sound-insulating functions underwater.

[Embodiments of the invention]

The present invention will be described in detail below with reference to FIG. 1 of the accompanying drawings.

In the following description, the same components as those of the above-mentioned conventional example will be described with the same reference numerals.

1 is a base for underwater use such as a cradle or a hull, 2a,
Reference numeral 2b denotes a support member (supporting metal fitting) mounted opposite to the base 1, and a receiver 4 is installed on the tip side of the support members 2a, 2b via springs 3a, 3b such as springs. Both ends of the top plate 5 are attached.

A plurality of subdivided pressure-resistant air bags 10 are filled in the space X between the base 1 and the surface plate 5 so as to fill the space X, and each pressure-resistant air bag 10 has a The maximum pressure is sealed from the beginning so that the amount of air does not change.

In the embodiment of the present invention, the pressure-resistant air bag 10 is formed by arranging a plurality of braided hoses of a predetermined diameter in multiple stages in orthogonal directions, but is not limited to this embodiment, and is formed into a spherical shape. The space X may be filled with the pressure-resistant air bag 10.

As described above, by configuring the vibration isolation mechanism with the springs 3a, 3b and the plurality of subdivided pressure-resistant air bags 10, etc., the top plate 5 can be vibrated by the water between the top plate 5 and the base 1. Since the spring 3a is not restrained, the spring 3a is connected from the base 1 via the support members 2a and 'lb.

The vibration isolation mechanism constituted by 3b and the top plate 5 operates normally. Furthermore, the sound waves radiated from the base 1 are not transmitted to the surface plate 5 because of the pressure-resistant air bag 10. Moreover, since the pressure-resistant air bag 10 is divided into pieces, the task is as simple as inserting it between the spaces X, and the assembly process can be simplified.

In addition, the springs 3a, 3b and the surface plate 5, which are the constituent elements of this system, do not require a water pressure resistant structure, and even when used under particularly high water pressure, the segmented pressure resistant air bags 10 provide pressure resistance. This makes it easier to do this, and it is possible to improve the sound insulation effect at a greater depth than with a non-pressurized air bladder.

Furthermore, by uniformly distributing and fixing the pressure-resistant air bags 100, it is possible to maintain a uniform sound insulation effect even after the pressure-resistant air bags 10 contract due to an increase in external pressure.

In addition, if the remaining amount of air in the pressure-resistant air bag 10 becomes extremely low under high water pressure that exceeds the design value, the vibration and sound insulation function will be lost, but it will not collapse, and when the pressure is restored again, Another feature is that it also restores vibration and sound insulation functions.

〔Effect of the invention〕

In this invention, the ends of the surface plate on which the receiver is installed are attached via springs to the opposing support members attached to the base as described above, and the space between the base and the surface plate is Since the air bag is filled with segmented pressure-resistant air bags, it has a simple structure, which simplifies the assembly process, and improves the sound insulation effect at a large depth. Even after the bag shrinks, the sound insulation effect can be maintained evenly.
It has the effect of effectively demonstrating its vibration-proofing and sound-insulating functions even underwater, making it possible to obtain high vibration-proofing and sound-insulating performance. However, there is an effect that can be used effectively.

In addition, since it is not complicated, large and heavy like the conventional method, it can be manufactured at low cost and maintenance is easy.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of an underwater vibration-proof and sound-insulating stand embodying the present invention, and FIGS. 2 and 3 are schematic diagrams of a conventional underwater vibration-proof and sound-insulating stand. 1... Mother stand, 2a, 2b... Support member, 3a, 3b
... Spring, 4... Receiver, 5... Surface plate, 10.
・Pressure-resistant air bag. Agent Patent Attorney Nobuo Ogawa −

Claims (1)

[Claims] In an underwater vibration-proof and sound-insulating table in which the end portion of a surface plate on which a receiver is installed is attached via a spring to opposing support members attached to the base, a space between the base and the surface plate. An underwater vibration-proof and sound-insulating stand characterized by being filled with segmented pressure-resistant air bags.