JPH07329878A - Float structure - Google Patents

Abstract

PURPOSE:To prevent instantaneous breakage of an electric wave emitted from an antenna wire provided inside of a balloon by water by devising a float hardly to be carried away by wind and on a water current so that the balloon is not covered with water and the float does not sink below the surface of the water. CONSTITUTION:A balloon 12 the plane section of which is a streamline is devised to constantly face the front side of the streamline in wind and on a water current by installing a cable support part 15 at a position to divide an side area of the balloon 12 into two and providing a rotational moment by resistance force of the wind and the water current around a vertical axis passing this cable support part 15 as its center.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a balloon type float structure used for suspending an ocean sensor or the like.

[0002]

2. Description of the Related Art A conventional float structure is disclosed in, for example, Japanese Utility Model Laid-Open No. 59-106204. In this float structure, as shown in FIG. 9, a housing 2 having a cable supporting portion 1 and a balloon 3 are connected with their central axes aligned with each other, and a cable in which a sea anchor 4, a sensor 5, etc. are attached to the cable supporting portion 1. 6 are connected to form a float 7. Further, as shown in FIG. 10, the balloon 3 has an elliptical cross section, and an antenna wire 8 is attached inside the balloon 3 so that the information detected by the sensor 5 is emitted as a radio wave. .

Before use, the float 7 having the above construction is housed in a cylindrical container 9 as shown in FIG.
In this cylindrical container 9, a sensor 4, a sea anchor 5, and a housing portion 16 for the cable 6, a housing 2, and a balloon 3 are housed in order from the bottom, and a parachute 11 is housed on the balloon 3 via a coupling plate 10. There is.

When the cylindrical container 9 is dropped from the sky to the sea or the like by an airplane or the like, the parachute 11 is opened and the cylindrical container 9 is opened.
Decelerates and descends at a constant speed, landing on the sea surface in a stable posture. When water arrives, a seawater battery (not shown) or the like is activated, and a cylinder opening mechanism (not shown) housed in the housing 2 operates. Then, gas is injected into the balloon 3 from a gas cylinder (not shown), and the balloon 3 begins to expand. The balloon 3 pushes the connecting plate 10 open, the cylindrical container 9 expands outward, and other stored items in the cylindrical container 9 also separate and float on the sea surface. Then, as the cable 6 extends, the sensor 4 and the sea anchor 5 sink into the sea, and start transmitting radio waves from the antenna wire 8.

[0005]

However, in the above-mentioned float structure, as shown in FIG. 8, when the sea wind is strong, the balloon tends to have the largest area with respect to the wind. As a result, However, the balloon will fall over, and the balloon will be easily covered with water due to the waves. For this reason, there is a problem that the emission of radio waves is momentarily interrupted.

Further, as shown in FIG. 9, the sea anchor connected to the cable prevents the sensor from being swept by the water flow. However, when the housing receives a force by the water flow, the float tilts due to the resistance force. At the same time, as in the case of wind, the balloon stabilizes in the direction of the largest area. For this reason, there is a problem that a drawing phenomenon occurs due to the water flow, the balloon is drawn below the sea surface, and the emission of radio waves is momentarily cut off.

[0007]

In view of the above, the present invention forms a float with a balloon used by injecting and inflating gas and a housing connected to the balloon and containing a gas cylinder and the like. In a float structure having a cable support portion for connecting a cable, the balloon has a streamlined plane cross section, and the cable support portion is attached to a front side of a vertical center line that bisects a side area of the balloon. To do.

The housing has a tubular shape and is attached to the balloon obliquely toward the rear side of the streamline type with respect to the vertical direction.

[0009]

According to this structure, the side of the balloon having a larger area has a greater resistance to the wind and water flow than the side having a smaller area, so that a rotation moment is generated around the cable supporting portion and the balloon rotates. . As a result, the streamlined front side of the balloon is always oriented in the windward direction or the direction in which the water stream flows, and the streamlined characteristic is utilized to reduce the wind or water stream resistance.

Further, since the cylindrical housing is attached obliquely, the resistance against water flow is also small.
For this reason, it will not be covered with water or drawn below the surface of the sea, and it will be difficult for the electric wave to be interrupted momentarily.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In the following description, the same parts as those in the above-mentioned conventional technology are designated by the same reference numerals. FIG. 1 is a schematic structural view of a float, FIG. 2 is a plan sectional view of a balloon, and FIG.
Is an explanatory view of the state of the float with respect to the wind, and FIG. 4 is an explanatory view of the state of the float with respect to the water flow.

In the figure, reference numeral 12 is a balloon, which is a portion that is inflated by the gas of a gas cylinder (not shown) and floats in seawater. Its shape is such that its plane cross section is as shown in FIG. It is streamlined as shown. Further, the antenna wire 8 is attached inside the balloon 12 so that the information detected by the sensor 5 is emitted as a radio wave.

Reference numeral 13 denotes a cylindrical housing for accommodating a circuit board, a cylinder, etc., which is attached to the rear side of the balloon 12 tilted toward the streamline type on the substantially vertical center line. Then, the balloon 12 and the housing 13
The float 14 is configured by connecting and while airtight with a flange or the like.

Reference numeral 15 denotes a cable supporting portion, which is on the streamlined front side of the area center line of the side surface of the balloon 12 and which is the balloon 1.
It is located near the draft surface of 2, and supports the cable 6 to connect the sea anchor 4, the sensor 5 and the like to the float 14. In addition, the cable support portion 15 is provided in the housing 13.
It may be formed on or in contact with both the balloon 12 and the housing 13.

Next, the state of the float 14 with respect to the wind and the water flow will be described. First, the state of the float 14 with respect to the wind will be described. For example, consider the case where wind blows on the side surface of the float 14. The balloon 12 which receives the wind rotates counterclockwise as shown in FIG. 2 around the vertical axis passing through the cable support portion 15 and stabilizes by making the streamlined front side windward as shown in FIG. .

Rotation about the vertical axis causes an unbalanced drag force due to wind on the left and right sides of the balloon 12 about the vertical axis. That is, the area on the rear side of the streamline type is larger than that on the front side of the streamline type, so that the drag force on the rear side of the streamline type becomes large and a rotational moment is generated. Also, the reason why the streamlined front side is windward and stable is that there is no rotational moment.

As described above, the streamlined front side is set to windward and stabilized. For this reason, as shown in FIG. 4, the streamlined characteristic is taken advantage of with respect to the wind, and the influence of the wind can be suppressed, so that the inclination of the float 14 is reduced and the balloon 12 is less likely to be covered with water due to waves. Therefore, the electric wave is less likely to be interrupted. Next, the state of the float 14 with respect to the water flow will be described. For example, when a flow hits the side surface of the float 4, the housing 13 in the water flow begins to sink due to the resistance of the water flow, but the float 14 moves around the vertical axis as in FIG. It rotates and stabilizes with the streamlined front side facing the direction in which the water stream flows, as shown in FIG.

At this time, although the balloon 12 is slightly inclined by the water flow, the balloon 12 has a streamlined shape and the housing 13 is obliquely attached, so that its resistance is small, and FIG.
Since the resistance of the water flow is minimized as shown in (4), it becomes difficult for the balloon 12 to be covered with water and the balloon 12 is prevented from being drawn below the sea surface, so that the radio wave is less likely to be interrupted.

When both the wind and the water flow act on the float 14, the balloon 1 is balanced at the point where the combined force of the wind resistance and the water flow resistance becomes the minimum.
Make it difficult to splash water on 2. In addition, the float 1 having the above configuration
It is the same as in the conventional case that the sensor 4 is housed in a cylindrical container and dropped into the sea or the like to extend the cable 6 so that the sensor 4 is submerged in the sea.

[0020]

As described above, in the float structure of the present invention, the balloon has a streamlined plane cross section, and the cable supporting portion is attached to the front side of the vertical center line that bisects the side area of the balloon. Since the balloon can always be oriented in a direction that takes advantage of the streamlined characteristic that minimizes the resistance to water flow, it is difficult for the balloon to be covered with water and difficult to be drawn below the sea surface, and the instantaneous radio wave caused by water The effect of making disconnection less likely is obtained.

Further, the housing has a cylindrical shape and is attached to the balloon obliquely toward the streamline-shaped rear side with respect to the vertical direction, so that the resistance force of the water flow can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic structural diagram of a float according to the present invention.

FIG. 2 is a plan sectional view of the balloon of the present invention.

FIG. 3 is an explanatory view of a state of the float of the present invention with respect to wind.

FIG. 4 is a view of the balloon of FIG. 3 viewed from the direction C.

FIG. 5 is an explanatory view of a state of the float of the present invention with respect to a water flow.

6 is a view of the balloon of FIG. 5 as seen from the direction D. FIG.

FIG. 7 is a schematic structural diagram of a conventional float.

FIG. 8 is a plan sectional view of a conventional balloon.

FIG. 9 is an explanatory diagram of a state of a conventional float with respect to wind.

FIG. 10 is an explanatory view of a state of a conventional float with respect to a water flow.

FIG. 11 is a side sectional view showing a stored state of the float.

[Explanation of symbols]

 12 balloon 13 housing 14 float 15 cable support

Front Page Continuation (72) Inventor Yasunori Nakata 1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric Industry Co., Ltd.

Claims (2)

[Claims] 1. A float is formed by a balloon used by injecting and expanding gas and a housing connected to the balloon and containing a gas cylinder and the like, for connecting a cable having a sensor attached thereto. In the float structure having the cable support portion, the balloon has a streamlined plane cross section, and the cable support portion is located in front of the vertical center line that bisects the side area of the balloon. 2. The housing according to claim 1, wherein
A float structure, which has a tubular shape and is obliquely attached to the balloon toward the streamline-shaped rear side with respect to the vertical direction.