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JPH0568195

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DESCRIPTION JPH0568195
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
tubular underwater transducer for detecting underwater waves by detecting ultrasonic waves in
water, and in particular, can be wound with a high tension on a small radius drum. It relates to an
underwater transducer.
[0002]
2. Description of the Related Art A conventional technology of this type of field is disclosed in
Japanese Utility Model Application Publication No. 61-206392, and the configuration of a
conventional underwater transducer is described based on this document. This will be described
using FIG. 2 is a cross-sectional view of an essential part of a conventional underwater
transducer, and in the figure, 1 is a cylindrical flexible tube made of a flexible member such as a
urethane hose, and each component shown below is Is incorporated. Reference numeral 2
denotes a filling oil filled in the flexible tube 1, and reference numeral 3 denotes a plurality of
tension members, which are stretched inside the flexible tube 1 substantially over the entire
length thereof. A plurality of ring-shaped spacers 4 are disposed at predetermined intervals in
the flexible tube 1 and each tension member 3 is disposed at each position so as to uniformly
stretch the plurality of tension members 3. It supports the end.
[0003]
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1
Reference numeral 5 denotes a spacer stopper used when supporting the tension member 3 on
the spacer 4. By arranging the stoppers at equal intervals so as to project from the end face along
the shape of the spacer 4, the respective tension members 3 are not Are kept parallel so that they
do not intertwine or interfere with each other. Reference numeral 6 denotes a terminal plug or
relay plug provided to close the end of the flexible tube 1, and as shown in FIG. 2, each tension
member 3 is provided at the center of the end face of the terminal plug or relay plug 6. The
terminals are held together via the terminal plug or relay plug stopper 7 in a state where the
respective terminal parts are bundled into one.
[0004]
A plurality of cables 8 communicate the detection signals etc. obtained from a plurality of
transmitting / receiving elements (not shown), and the like. The central hole is penetrated, and at
the end portion, the end face of the end plug of the flexible tube 1 or the end face of the relay
plug 6 is equally spaced around the stopper 7 for the terminal plug or relay plug The fixing
support 9 is a metal fixing fitting that clamps the end of the flexible tube 1 from the outer
periphery thereof so as not to be entangled with each other by arranging a plurality of tubes. The
plug 6 is firmly fixed inside the flexible tube 1
[0005]
As described above, in the flexible tube 1, a plurality of tension members 3 and a plurality of
spacers 4, a transmitting and receiving element (not shown), a plurality of cables 8, and a
terminal plug or relay plug 6 are assembled. And the submersible transducer 10 is configured by
being filled with the filling oil 2, and the submersible transducer 10 may be wound on a drum or
the like with high tension, and an external force that is bent by the winding operation. When the
flexible tube 1 is applied to the flexible tube 1, the flexible tube 1 bends along the drum, but the
terminal portion of the tension member 3 incorporated inside is collectively the terminal plug or
relay plug as described above Since it is fixed at the center of the end face of 6, the tension
member 3 is uniformly stretched, and thus the underwater transmitter-receiver 10 is structured
so that it can be wound around the drum with high tension.
[0006]
However, the above-described conventional structure of the underwater transducer has the
following problems.
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2
FIG. 3 is a cross-sectional view of an essential part showing the problems of the prior art,
showing a state in which the underwater transmitter-receiver 10 is wound around a drum 11
with a relatively small radius.
As shown in this figure, if the drum 11 for winding the underwater transducer 10 has a relatively
small radius, if the submerged transducer 10 is wound around the drum 11 of this small radius
with high tension. , The end plug at the end of the flexible tube 1 in order that the outer portion
of the flexible tube 1 extends and the inner portion in contact with the drum 11 is wound while
being compressed as seen in the figure. There was a case where breakage occurred in an inner
portion near the relay plug 6. Such unevenness of the surface of the flexible tube 1 plays an
important role in maintaining the acoustic performance in the underwater transducer having the
above-mentioned structure, and it is very generally known. It is Therefore, such bending of the
flexible tube 1 has been a major problem that reduces the acoustic performance of the
underwater transducer.
[0007]
Further, since a plurality of cables 8 for communication are built in the flexible tube 1, the
portion in contact with the drum 11 of the flexible tube 1 can be seen inside as shown in the
figure. When bent, the cable 8 may be pinched between the inner wall of the flexible tube 1 and
the tension member 3 stretched in the flexible tube 1 and may be damaged or broken. The
present invention has been described above. This is done to solve the problem, and it prevents
winding of flexible tube caused by winding around the end plug or relay plug of flexible tube end
even if wound with high tension on small radius drum It is an object of the present invention to
provide a high performance and high quality underwater transducer by damaging the acoustic
performance of the underwater transducer or preventing the breakage of the cable inside the
flexible tube.
[0008]
SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present
invention is directed to a cylindrical flexible tube comprising at least one transceiving element
and a plurality of the transmissible elements connected to the transmissible element. A cable, a
plurality of spacers disposed at predetermined intervals to hold the cable, and a plurality of
tension members supported by the spacer and fixed to end plugs or relay plugs disposed at the
end In an underwater transducer filled with filling oil, inside the flexible tube between the
terminal plug or relay plug and the adjacent spacer, from the end face of the terminal plug or
relay plug to the end face of the spacer A resin-coated coil spring is disposed with a length.
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[0009]
According to the above-mentioned configuration, when the underwater transducer is wound on a
small diameter drum with high tension, the flexible tube of the underwater transducer is curved
along the outer peripheral surface of the drum.
At this time, the circumferential surface of the flexible tube in contact with the drum tends to
bend so as to enter the inside of the flexible tube, but between the terminal plug or relay plug
provided at the end and the adjacent spacer In addition, by providing a coil spring between the
two, the flexible tube has flexibility in the radial direction as well as in the axial direction, and
when it is wound on a drum of high tension and a small radius, resin is used. By reducing the
diameter of the coated coil spring, the external force received from the flexible tube is absorbed,
and the spring force prevents the circumferential surface of the flexible tube from being bent
inward.
[0010]
DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will
be described below with reference to the drawings.
FIG. 1 is a sectional view of an essential part showing the structure of the underwater transducer
according to this embodiment. In the figure, 1 is a flexible tube, 2 is a filling oil, 3 is a tension
member, 4 is a spacer, 5 is a stopper for spacer, 6 is a terminal plug or relay plug, 7 is a terminal
plug or relay plug stopper, 8 is a cable And 9 are fixing brackets, which are substantially the
same as those described in the prior art and configured in the same manner. A coil spring 12 is
coiled and resin-coated. The coil spring 12 is a flexible tube between the end plug or relay plug 6
in the flexible tube 1 and the adjacent spacer 4a. In the inside of the end surface of the terminal
plug or relay plug 6 to the end surface of the spacer 4 along the inner peripheral surface of the
flexible tube 1, the resin-coated coil spring 12 is incorporated. The underwater transducer 13
according to the present embodiment is configured.
[0011]
In order to be taken up on the drum 11 as shown in FIG. 2, the underwater transmitter / receiver
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13 provided with the resin-coated coil spring 12 along the outer peripheral surface of the drum
11 as shown in FIG. A bending external force is applied. As a result, although the vicinity of the
end of the flexible tube 1 is likely to be bent inward as in the prior art, in the present
embodiment, since the coil spring 12 is built in the flexible tube 1, this resin coating The strength
of the spring force of the coil spring 12 prevents this bending. Therefore, the inner side of the
flexible tube 1 in contact with the drum stagnates along the outer diameter of the coil spring 12
and never bends inward. Further, the resin coating of the coil spring 12 prevents the sound from
deteriorating and deterioration of the acoustic performance when the coil springs collide with
each other during towing.
[0012]
In order to prevent bending of the flexible tube 1 other than the means described above, a metal
spring is embedded in the flexible tube 1 to prevent buckling of the flexible tube 1 in the
diameter direction. And those in which a reinforcing cloth such as Kevlar is similarly embedded
in the flexible tube 1 are generally found in high-pressure rubber hoses, but this may increase
the thickness of the rubber hose which is a flexible tube, In order to embed metal springs or
reinforcing cloths in rubber, ie in flexible tubes, the flexibility of the flexible tubes in the
longitudinal direction is lost, so that it is possible to take up on a small radius drum It does not
reinforce the flexible tube 1 of the wave device 13.
[0013]
On the other hand, as described above, since the resin-coated coil spring 12 of the present
invention is attached and inserted into the flexible tube 1, it has freedom in both the radial
direction and the axial direction. It will be there.
Therefore, when wound around a drum with high tension and small radius, the diameter of the
coil spring 12 can be reduced to absorb external force received from the flexible tube 1, and the
thickness of the flexible tube 1 is as thin as possible. In addition, in order to prevent the inward
bending of the flexible tube 1, it is generally considered that the thickness of the flexible tube 1
should be increased. However, if the thickness is increased, the flexible tube When the outer
diameter of 1 becomes large and it is necessary to wind it up on the drum 11 with a small radius,
the flexible tube 1 not only becomes easy to bend but also prevents the reduction in size and
weight, and as a result It can be said that it is more effective to make the flexible tube 1 as thin as
possible.
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[0014]
As described above, according to the present invention, at least one wave transmitting / receiving
element, and a plurality of cables connected to the wave transmitting / receiving element in a
cylindrical flexible tube, A plurality of spacers disposed at predetermined intervals to hold the
cable, and a plurality of tension members supported by the spacers and fixed to the end plug or
relay plug disposed at the end are accommodated. And in the underwater transducer filled with
filling oil, the length from the end face of the terminal plug or relay plug to the end face of the
spacer inside the flexible tube between the terminal plug or relay plug and the adjacent spacer It
was decided to arrange a resin-coated coil spring.
[0015]
Therefore, since the flexible tube has freedom in both the radial direction and the axial direction
by the spring force of the coil spring, the flexible tube can bend in any direction freely, so the
flexible tube bends inward. It can be wound with a high tension on a small radius drum without
any problems, so if the flexible tube is broken, the cable built in the flexible tube will be pinched
between the tension member and broken. As a result, it is possible to prevent the communication
from being disconnected and to suppress the acoustic performance without lowering the acoustic
performance due to the unevenness of the surface of the flexible tube due to the breakage of the
flexible tube, and A high performance underwater transducer can be provided.
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