JPH082632Y2 - Vibration damper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an improvement of a vibration attenuator used in a sound source search apparatus.

[Prior Art] FIG. 2 is a block diagram of a sound source exploration device used for oil resource exploration and the like, 1 is a towing vessel, 2 is a towing cable, 3 is a vibration attenuator, 4 is a sensor, 5 is an ultrasonic wave, 6 is the sea floor and 7 is the sea surface.

The sound source search device is a cable 2 connected to the towing vessel 1.
A sensor 4 is connected via a vibration attenuator 3 and the towing vessel 1 tows. The vibration attenuator 3 has an outer diameter of 80 mm and a length of several tens of meters, and the sensor 4 has an outer diameter of 50 to 60 mm and a length of several hundred meters, each of which has a specific gravity similar to that of seawater. Therefore, as shown in the figure, the tugboat 1 is towed under the sea at an appropriate depth.

In the oil resource exploration, the reflected wave on the seabed 6 of the ultrasonic wave 5 transmitted from the oscillator (not shown) of the sensor 4 is received by the receiver (not shown) of the sensor 4, and the signal is towed by the signal line. It is sent to the ship 1 and analyzed to detect the presence or absence of oil and its reserves.

While towing the sound source search device, the towing cable 2 is on the sea surface 7.
The tow cable 2 vibrates due to waves and other
The vibration adversely affects the function of the sensor 4. In order to avoid this, a vibration damper 3 is arranged between the tow cable 2 and the sensor 4. That is, the vibration attenuator 3 is for absorbing the above-mentioned vibration generated by the towing cable 2 and blocking the influence of the vibration on the sensor 4.

FIG. 3 shows an example of this vibration attenuator 3.
8 is a partial cross-sectional view of the vibration damper disclosed in Japanese Patent Laid-Open No. 58-055313, in which 8 is a cylindrical casing formed of an elastic material, 9 is a tension member, and 10 is a curl inside the casing 8. The signal line 11 is stored in a box shape, and 11 is a filling oil filled in the housing 8. In the figure, the housing 8 is made of an elastic material, and is configured to absorb the above-mentioned vibration generated during towing and reduce towing noise. However, when a tension more than a prescribed value is applied to the housing 8 and the extension of the housing 8 becomes large and the surplus length of the tension member 9 disappears, the tension applied to the housing 8 is also transmitted to the tension member 9, and the tension is applied to the housing 8. 8 and the tension member 9 will be in charge. Since the tension member 9 does not have elasticity, the housing 8 does not extend further,
The vibration damper will lose its original damping characteristics.

In order to keep the damping characteristic of the vibration damper as long as possible, it is necessary to lengthen the elastic holding period of the housing 8, and for that purpose, the extra length of the tension member 9 is sufficiently larger than the length of the housing 8. Need to take. As a result, the extra length of the tension member 9 is made sufficiently long with respect to the length of the housing 8, and the tension member 9 is housed in the housing 8 by meandering or bending.

FIG. 4 is a cross-sectional view showing a vibration damper having a tension member 12 of another structure. In this vibration damper, the tension member 12 is a woven fabric having a required strength, for example, a Kevlar fiber woven fabric. Is formed in a cylindrical shape by using, and the signal line 10 is arranged inside the cylindrical tension member 12, and the tension member 12 is bent in a bellows shape to have a sufficient extra length and housed in the housing 8. It is a thing.

[Problems to be Solved by the Invention] In the conventional vibration damper described above, in the vibration damper shown in FIG. 3, since the tension member 9 has a rope shape, the excess length of the tension member 9 is increased. When stored in the body 8, the workability is poor, and the tension member 9 is deformed, which is called a kink or a laugh. In addition, the tension member 9 and the signal line 10 may be entangled with each other to cause the disconnection of the signal line 10, which has been a problem for some time.

In the vibration damper shown in FIG. 4, the tension member 12 is prevented from kinking or laughing, but in order to have a sufficient extra length for the signal line 10, the signal line 10 is meandered or bent. Therefore, the workability of assembling the vibration attenuator is poor, and a kink is generated in the signal line 10 to easily cause a disconnection problem.

The present invention has been made in order to solve the above problems of the conventional device, and an object thereof is to provide a vibration attenuator which is lightweight and has good workability.

[Means for Solving the Problems] In order to achieve the above object, a vibration damper according to the present invention comprises a stretchable protective rope having no extra length, and a belt-shaped rope having extra length and required strength. And a curled signal line arranged on the outer peripheral portion of the tension member.

[Operation] When tension acts on the vibration damper configured as described above, the housing first expands, and the protective rope of the tension member expands accordingly. When the protective rope extends and the extra length of the strip rope disappears, the strip rope of the tension member shares the tension with the housing, and the strip rope does not expand and contract, so the housing does not extend further and the housing is prevented from being damaged. To be done. Also, on the outer circumference of the tension member that does not have extra length,
Since the signal line is curled and stored in the housing, it excels in workability when assembling the vibration attenuator, does not cause kinks or laughs on the tension member, and eliminates the entanglement between the tension member and the signal line. Therefore, the signal line is not broken.

[Embodiment of the Invention] FIG. 1 is a partial sectional view of a vibration attenuator showing an embodiment of the present invention, in which 8 is a housing, 10 is a signal line, 11 is a filling liquid, and 13
Is a tension member, 13a is a protective rope, and 13b is a belt-shaped rope.

As shown in the figure, the vibration attenuator according to the present invention comprises a tension member 13 which is a cylindrical protection rope 13a having no extra length, and a tension member 13 which accommodates a belt-shaped rope 13b having the extra length. The curl-shaped signal line 10 arranged on the outer peripheral portion of the member 13 is housed in the housing 8.

Although the protection rope 13a is formed to be stretchable, the belt-shaped rope 13b is made of, for example, Kevlar fiber or the like and does not stretch but has sufficient strength to withstand the tension applied to the vibration damper. Further, since the signal line 10 is curled, it has an extra length and can be expanded following the expansion of the housing 8. The extra lengths of the belt-shaped rope 13b and the signal line 10 should be appropriately determined in consideration of the specifications of the housing.

The vibration damper according to the present invention is constructed as described above. On the outer peripheral portion of the tension member 13 in which the belt-shaped rope 13b is housed inside the protection rope 13a formed in a cylindrical shape,
Since the signal line 10 processed into a curl shape is arranged, the tension member 13 and the signal line 10 are provided in the housing 8.
When storing, the workability is good. Further, no kink or laughter occurs in the tension member 13, and no entanglement between the tension member 13 and the signal line 10 occurs.

When the vibration attenuator is towed by a towing ship, when a tension is applied, the housing 8 first expands, and the protection rope 13a of the tension member extends as the housing 8 extends. During this time, the belt-shaped rope 13b of the tension member extends its extra length. When the extra length of the strip-shaped rope 13b of the tension member disappears, the tension applied to the casing 8 is also applied to the strip-shaped rope 13b of the tension member, and the strip-shaped rope 13b having strength but not elasticity is capable of receiving the tension. So
The housing 8 does not extend any more, so there is no risk of damaging the housing 8.

In this embodiment, the tension member protection rope 13a is formed into a cylindrical shape, and the belt-shaped rope 1a is formed inside the protection rope 13a.
Although the configuration in which 3b is arranged is adopted, the shape of the protective rope 13a is not limited to the cylindrical shape, and may be another shape.

[Advantages of the Invention] A vibration damper according to the present invention comprises a tension member which is made of a protective rope that is expandable and contractible and has no extra length, and a belt-shaped rope that has the necessary strength and has an extra length, and the outer circumference of the tension member. Since the curl-shaped signal line arranged in the above section and the signal line are housed in the housing, the following excellent effects are obtained.

(1) Since the protection rope of the tension member has no extra length, the tension member does not cause a kink or laugh.

(2) On the outer circumference of the tension member that has no extra length,
Since the signal line processed into the curl shape is arranged, its workability is improved when assembling the vibration damper.

(3) At the same time, the entanglement between the tension member and the signal line disappeared, and therefore the signal line was not disconnected.

[Brief description of drawings]

FIG. 1 is a side sectional view of (a) of a vibration damper according to an embodiment of the present invention, (b) is a sectional view taken along line AA, and FIG. 2 is a configuration diagram of a conventional sound source search device, and FIG. The figure shows (a) a side sectional view of a conventional vibration damper, (b) its AA sectional view, and FIG.
The figure shows (a) a side sectional view of a conventional vibration damper, and (b) is an AA sectional view thereof. In the figure, 8 is a housing, 9, 12 and 13 are tension members, 10 is a signal line, 11 is a filling liquid, 13a is a protective rope, and 13b is a belt-shaped rope.

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Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. A tension member comprising a protective rope which is stretchable and has no extra length, and a belt-shaped rope which has a necessary strength and has an extra length; A vibration attenuator, characterized in that the processed signal line and are housed in a housing.