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JP2007150425

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JP2007150425
To provide a fiber reinforced plastic sonar dome which can be easily transported and which can
be easily molded without requiring equipment such as a waterfront factory having a large site.
SOLUTION: A sonar dome main body 4 is constituted by dividing a fiber reinforced plastic sheet
in which a reinforcing fiber 5 is impregnated with a resin material as a raw material into at least
two or more parts. 4 b is assembled integrally via the bonding means 6. [Selected figure] Figure 1
Fiber reinforced plastic sonar dome
[0001]
The present invention relates to a fiber reinforced plastic sonar dome, and more particularly to a
fiber reinforced plastic sonar dome having improved molding workability of a sonar dome body.
[0002]
Heretofore, as a sonar dome for protecting a transducer (acoustic sensor etc.) mounted on an
observation ship etc., one mounted on the bottom of a ship to improve acoustic performance, and
one mounted on a bow are known, and in recent years In order to reduce the influence of noise
and vibration from the ship and underwater noise generated from other devices, a structure
mounted on the bow side is the mainstream (see, for example, Patent Document 1).
[0003]
As a conventional attachment structure of a sonar dome, as shown in FIGS. 3 and 4, for example,
the transducer 3 is accommodated in the hollow portion 2 on the lower side of the bow of the
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hull 1, and the transducer 3 and the cavity 2 The sonar dome main body 4 is airtightly attached
so as to cover the.
[0004]
As a method of attaching the sonar dome main body 4 to the hull 1, when a composite dome
made of fiber reinforced plastic (made of FRP) is attached to the hull, it is tightened and attached
by a fastening member such as a bolt. In the case of mounting the main body, a method of
mounting using a bead is known.
[0005]
By the way, when the sonar dome main body 4 is a large-sized structure, and the sonar dome
main body 4 is manufactured by integral molding as a fiber reinforced plastic (FRP) structure, the
factory site is wide as in foreign countries and limited to transportation etc. There is no support
when manufacturing in the place where there is no
However, when there are certain limitations in the site and transportation as in Japan, when the
large-sized sonar dome main body 4 as described above is integrally molded, although it can be
manufactured, it is possible to transport it during transportation because There is a problem that
it becomes difficult to transport, and in order to manufacture the sonar dome main body 4 by
integral molding, facilities such as a waterfront factory having a large site are needed, and if
there is no facility such as a critical factory. There is a problem that it is difficult to manufacture
the sonar dome main body 4 by integral molding.
JP-A-8-327726
[0006]
The present invention has been devised focusing on such conventional problems, in which a fiber
reinforced plastic sonar dome is divided into a plurality of pieces and formed, and the divided
formed products are combined and integrally configured. It is an object of the present invention
to provide a fiber reinforced plastic sonar dome which can be easily transported and which can
be easily molded so as not to require facilities such as a waterfront factory having a large site.
[0007]
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2
In order to achieve the above object, the present invention is configured by dividing a sonar
dome main body into at least two or more divisions using a fiber reinforced plastic sheet in which
a reinforcing fiber is impregnated with a resin material, and the divided body of the sonar dome
main body The gist of the present invention is that it is integrally formed through the joining
means.
[0008]
Here, the sonar dome main body is configured in two, and the joining means is joined by a
fastening joint structure or a resin joint method.
[0009]
By configuring in this way, it is possible to facilitate transportation and to facilitate molding
workability, without requiring facilities such as a critical plant having a large site.
[0010]
In the present invention, the sonar dome main body is divided into at least two or more parts by
using the fiber reinforced plastic sheet in which the reinforcing fiber is impregnated with the
resin material as described above, and the divided bodies of the sonar dome main body are joined
The integral structure through the means provides the following excellent effects.
(a).
It is possible to enable road transportation that could not be integrally molded as before.
(b).
In the case of integral molding, there is no need for facilities such as a seaside factory having a
large site which is required, so it is possible to reduce the facility cost and the cost of the sonar
dome main body.
(c).
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As in the past, when integrally forming the whole sonar dome main body, there was a problem
that the molding risk becomes high, but in the present invention, the sonar dome main body is
made of fiber reinforced plastic sheet as a material and at least divided into two or more. By
dividing and molding, even if molding fails, it is sufficient to mold only the failed divided part, so
that molding risk is reduced, and maintenance partial replacement work can be easily performed.
[0011]
Hereinafter, an embodiment of the present invention will be described based on the attached
drawings. The same components as those of the conventional example are given the same
reference numerals and the description thereof is omitted.
[0012]
FIG. 1 shows a partially enlarged cross-sectional view of a sonar dome showing a first
embodiment of the present invention, and the sonar dome main body 4 is made of at least two
fiber reinforced plastic sheets in which reinforcing fibers 5 are impregnated with a resin
material. The divided bodies 4 a and 4 b of the sonar dome main body 4 are integrally assembled
via the joining means 6.
[0013]
In this embodiment, the sonar dome main body 4 is divided into two halves 4a and 4b, but it may
be divided into two or more.
As shown in FIG. 1, the connecting means 6 forms flanges 7a and 7b inside the joint of the
divided bodies 4a and 4b of the sonar dome main body 4, and the flanges 7a and 7b are
tightened and fixed by bolts 8. Also, as in the second embodiment of FIG. 2, after the junctions of
the divisions 4a and 4b of the sonar dome main body 4 are butted and adhered, the fiber
reinforced plastic sheets 9a and 9b are attached to the front and back surfaces via an adhesive. It
is also possible to bond or reinforce by bonding using a hand lay-up method which is one of resin
joint molding methods.
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[0014]
As for the sound transmission loss, which is a function of the sonar dome main body 4, the
acoustic loss is more effective in the resin joint molding method such as the hand layup method
than the bonding method of the flanges 7a and 7b and the bolt 8 shown in FIG. It turned out that
it was excellent. Further, the bonding means 6 is not limited to the above embodiment, but can be
performed by another method.
[0015]
In the present invention, the sonar dome main body 4 is divided into at least two or more parts
by using the fiber reinforced plastic sheet in which the reinforcing fiber 5 is impregnated with
the resin material as described above. Since the units 4a and 4b are integrally formed via the
bonding means 6, the facility can be easily transported without requiring facilities such as a
waterfront plant having a large site, and molding workability can be facilitated.
[0016]
It is a partially expanded sectional view of a sonar dome showing a first embodiment of the
present invention.
It is a partially expanded sectional view of a sonar dome which shows 2nd Embodiment of this
invention. It is explanatory drawing of the observation ship which attached the conventional
sonar dome. It is a perspective view of the conventional sonar dome main body.
Explanation of sign
[0017]
Reference Signs List 1 hull 2 hollow portion 3 transducer 4 sonar dome main body 4a, 4b sonar
dome main body 5 reinforcing fiber 6 bonding means 7a, 7b flange 8 bolt 9a, 9b fiber reinforced
plastic sheet
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