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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a general buoy type
hydrophone, FIG. 2 is a block diagram of a buoy type hydrophone using an underwater anchor
according to the present invention, and FIG. FIG. 4 is a perspective view showing an embodiment
of the underwater anchor according to the invention, FIG. 4 is a perspective view at the time of
operation in the sea, and FIG. 5 a, b, c, d are process drawings showing an example of a folding
method. 1 ...... buoy, 2 ----- Tsu 4 Ne resistance cable, 4 ...... underwater microphones, 5,6 ......
cylinder, 7 ...... Flexible sheet, 8, 9, 10, 11.12, 13 ° 14.15
·································································································· Underwater anchor.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the construction
of a submersible anchor used to control the motion of a submersible microphone suspended in
the sea from a buoy floating on the sea. FIG. 1 shows the configuration of a general buoy type
hydrophone, in which 1 is a buoy, 2 is a springy cable, 3 is an underwater anchor, and 4 is an
underwater microphone. All of these components are accommodated in a cylindrical container
having a diameter of about 10α and a length of about 1 m, and after being put on the sea, they
are automatically extended to operate as shown in FIG. That is, since the submersible microphone
4 generates noise and disturbs the hearing sound, it is attached to the springy cable 2 and the
submersible anchor 3 in order to suppress this sway, and the additional mass or the water
content mass of the submersible anchor 3 The total amount of dynamic mass increase of the part
of the underwater microphone 4 suppresses the whole imaging movement transmitted from the
buoy 1 and the springy cable 2 to the underwater microphone 4 and the drag of the tidal current
acting on the lateral area of the underwater anchor 3 By reducing the relative flow velocity of the
underwater microphone 40 part, the vibration of the underwater microphone 4 is totally
suppressed by the phase 2-pair flow velocity. Therefore, the underwater anchor needs to have a
structure that has a large dynamic mass and a large drag and at the same time can be easily
housed in a small cylindrical container. The present invention is to connect two pieces in parallel
via a cylinder-full flexible sheet formed of a flexible material, and provide a plurality of largesized individual for taking in water inside on the peripheral surface of the both-opening cylinder.
It is an object of the present invention to provide an underwater anchor which can be
accommodated compactly in a small cylindrical container while obtaining a larger dynamic mass
and a greater degree of drag. An embodiment of the present invention will be described with
reference to FIG. 2 and the following figures. Reference numerals 5 and 6 denote cylindrical
bodies whose upper and lower end faces are closed so as to hold water inside in water. Is made
of a flexible material such as vinyl or cloth and made foldable, and the upper and lower end
surfaces are formed of a flexible material or a non-flexible disc provided with a rim on the outer
periphery or inner periphery Flat plate. Numeral 7 denotes a foldable flexible sheet made of
vinyl, cloth or the like, and the cylindrical bodies 5 and 6 are connected in parallel via this 3-, \
flexible sheet 7. 8, 9 and 10, 11, 12 and 13 are respectively provided on the peripheral surfaces
of the cylindrical bodies 5 and 6, and all are marked on the connecting side with the flexible
sheet 7. These holes 8.90, 9.12, 11, 12, 13 are for taking water into the cylinders 5 and 6 in
water, depending on the relationship between the movement of the cylinders 5 and 6 and the
water flow. Holes 9 and 11, 12 will be water inlets and holes 13 will be
water outlets; tj).
Denoted at 14.15 are air vent holes provided on the upper end surfaces of the cylindrical bodies
5,6. 16.17 shows all bifurcated cords or cables for supporting the cylinders 5, 6 up and down,
the upper cord 16 connecting to the springy cable 2 and the lower cord 17 connecting to the
underwater microphone. The diameters of the upper and lower end surfaces of each of the
cylindrical bodies 5 and 6 are slightly smaller than the inner diameter of the hydrophone ■
cylindrical container. . The underwater anchor 18 with the above configuration is folded small
and stored together with the springy cable 2 and the underwater microphone 4 etc. in the
cylindrical container of the small buoy type underwater audio system 7) / 7) and put into the sea
Is automatically expanded to the state of FIG. The cylindrical bodies 5, 6 of the underwater
anchor 18 are in the state of FIG. 3 when water penetrates into the interior from the holes 8, 9,
10 and 11, 12 13. The mass of water held in the cylindrical bodies 5, 6 The flexible sheet 7 acts
as a dynamic mass, and the flexible sheet 7 generates a drag, and as shown in FIG. 4 in the water,
the flexible sheet 7 swells in the direction of tidal current and suppresses the movement of the
underwater microphone 4. Together with the movement of the buoy 1. The 51st Buddha), (b), (c)
and (d) show an example of how to fold the underwater anchor mentioned above, and one
cylindrical body 5 is left-handed, as shown in the figure (roll). The other cylindrical body 6 is
right-wound and the flexible sheet 7 is wound. Next, after the upper and lower end faces of the
inner cylindrical body 5.6 are overlapped so that the ropes 16 and 17 are respectively inside as
shown in the drawing), the overlapping upper and lower bridge surfaces as shown in the drawing
(c) When the entire circumference of the cylindrical body 5, 60 and the flexible sheet 7 are
completely inserted between 0, as shown in FIG. In this way, it can be compactly stored in a small
cylindrical container, which can be folded into a small size 5- · -1). After entering the ocean, (4 →
(0 → (υ → (→ develop in order) in Figure 5). According to the underwater anchor according to
the present invention having the above-described structure and function, the two cylindrical
bodies provided with holes in the surface and the peripheral cylindrical bodies are automatically
deployed and held internally in the water automatically. By having a flexible sheet connected in
parallel, sufficient dynamic mass and drag can be obtained, and since it can be folded very
compactly, it has a significant effect of being able to be stored in a small cylindrical container. is
there. In addition, the hole provided in the surface of the cylinder has the advantage of being
inexpensive compared to the reverse IF valve conventionally used, and it is extremely useful as
an underwater anchor for a small buoy-type hearing instrument. It is a thing.