JPH09118296A - Casualty marker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a casualty marker which has a simple structure, and can surely functions in casualty without failure. SOLUTION: A casualty marker 10 has a radio reflector 11 on the upper part and a support body 145 for supporting the radio reflector on the lower part, the support body 14 has a float 12 supporting the radio reflector 11 and capable of floating on water surface, and a weight 13 mounted on the lower part of the float 12. The casualty marker 10 is ordinarily set on a hull 11 by a hull mounting part 20, and it separates from the hull 1 in the sinking or overturn of a vessel sank, and floats on the water surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a marine accident marker used for radar search when a marine accident occurs in a ship.

[0002]

2. Description of the Related Art When a marine accident occurs in a ship, it is an essential and important task for initial search to confirm the fact of the accident and to secure general information about the position of the accident. Searching for large sea areas
Day and night, a radar mounted on an aircraft is always used for searching regardless of weather conditions. There is a transmission type buoy (GMDSS) that is installed on a ship in case of a marine disaster and gives information on the position of the generated sea area to the aircraft. Since this is an active type that emits radio waves, it has the advantage of being discovered by radar from a long distance.

[0003]

[Problems to be Solved by the Invention] However, such G
MDSS has a problem in that it has to be artificially turned on in the event of a distress. For this reason, there are also accidents in which the switch was forgotten to be used when in distress and it was useless. On the other hand, there are some which are equipped with a water pressure switch that automatically detects the water pressure when it sinks, but has the problem that the structure is complicated. Moreover, GMDSS has no particular advantage for normal navigation.

Since the structure of GMDSS is complicated, it cannot be asserted that the failure probability of the electronic circuit is zero. In addition, there is a problem that the operation time is limited due to the battery life, and a long-time search cannot be endured. The present invention has been made in view of the above problems, and an object of the present invention is to provide a marine accident marker that has a simple structure and can function reliably during a marine accident without failure.

[0005]

In order to achieve the above object, a marine marine marker according to the invention of claim 1 has a support for supporting a radio wave reflector on an upper part and a radio wave reflector on a lower part, and is always provided. It is installed on the hull, and when the ship sinks or capsizes, it separates from the hull and stands upright and floats above the surface of the water.

According to the present invention, since the marine accident marker is composed of the radio wave reflector that is detached from the hull and floats on the water surface when the ship is sunk or capsized, it does not require a switch or the like. The physical structure of the radio wave reflector determines its performance, and it is guaranteed that it will always function reliably without failure. Since it is a passive type that reflects radar from a search aircraft, there is no functional deterioration due to battery consumption. Moreover, its structure is simple, small and inexpensive, and it requires almost no maintenance.

According to the second or third aspect of the invention, a radio wave lens or a corner reflector is used as the radio wave reflector.
Since radio wave lenses and corner reflectors have a large radar cross section compared to their physical size,
The probability of being captured by the radar of the search aircraft is high.

According to a fourth aspect of the present invention, in the first, second or third aspect of the present invention, the support body supports the radio wave reflector and is attached to a lower part of the float, which is floatable on the water surface. It is characterized by having a fixed weight.
This ensures that the float floats to the surface of the water, and the weight allows it to stand up and down.

According to the invention of claim 5, claims 1, 2 and
In the invention described in 3 or 4, the front support is attached to a hull attachment portion attached to the hull so as to be detachable in an upward direction and immovable in a horizontal direction. This ensures that when a ship sinks or capsizes,
The marine accident marker can be reliably removed from the hull.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic perspective view showing a form example of a marine accident marker of the present invention. In the figure, reference numeral 10 denotes a marine accident marker. The marine accident marker 10 has a radio wave reflector 11 on an upper portion and a support body 14 supporting the radio wave reflector 11 on a lower portion, and the support body 14 further floats on the water surface. Float 12 and weight 1 attached to the bottom of the float 12
3

The radio wave reflector 11 in FIG. 1 is an example using a radio wave lens. Specifically, as the radio wave lens, a spherical Luneberg lens 11a and a spherical band-shaped radio wave reflection material 11b mounted along the equator thereof. And a bowl-shaped radio wave reflection material (not shown) that covers the lower pole, so that no matter which direction the radio wave enters in the horizontal plane, the outer peripheral surface of the lens on the opposite side to the incident side The electric waves are focused and reflected by the electric wave reflecting material 11b, and the electric waves are returned in the direction opposite to the incident direction. Similarly, an incident radio wave from above is also reflected by a bowl-shaped radio wave reflection member (not shown). As such a radio wave reflector, for example, Japanese Patent Publication No. 52
No. 37906 or those described in JP-B-54-33798 can be used.

The lower part of the marine accident marker 10, that is, the weight 13
The portion has a cylindrical shape and is inserted into the cylindrical hull mounting portion 20 mounted on the hull 1 so that the marine accident marker 10 can be detached upward from the hull mounting portion 20 and horizontally. Mounted immovably. Therefore, although the marine accident marker 10 is normally fixed to the hull 1,
When the ship sinks or capsizes during a marine accident, the marine accident marker 10 is detached from the hull mounting portion 20 by its float 12 and floats on the water surface, and is vertically erected by the weight 13. It can reflect radar.

Of course, as time goes by after the accident occurs, the marine accident marker 10 is caused by tidal currents, waves, winds, etc.
Although it is washed away and moves from the initial site position, it is possible to supplement the estimation of the marine accident position by tracking the tidal current and the weather, which can be a great clue information for estimating the sea area. As described above, the operation is performed without the need for a switch or the like, and the performance thereof is determined by the physical structure of the radio wave reflector, so that it is guaranteed that the function always works without failure. Since it is a passive type that reflects radar from a search aircraft, there is no functional deterioration due to battery consumption. Moreover, its structure is simple, small and inexpensive, and it requires almost no maintenance.

The marine accident marker 10 also functions as a radar radio wave reflector during normal navigation. For example, as shown in FIG. 4, if the hull mounting portion 20 is mounted on the roof of a ship or the like and the marine accident marker 10 is mounted, it can function as a reflector also for a crossing ship or a control radar on land. it can. Since the radio wave reflector 11 has a large radar cross-sectional area, it has an advantage of operating in a direction to make the traffic of the ship safer.

FIG. 2 is a schematic perspective view showing another embodiment of the marine accident marker of the present invention.
A corner reflector is used as the radio wave reflector 15. The corner reflector 15 of this example is configured such that eight triangular corner reflectors in which triangular metal plates that are orthogonal to each other are combined can be combined to reflect an incident radio wave in all directions. Incidentally, instead of the triangular corner reflector of this example, a corner reflector of another shape such as a quadrangle may be combined.

FIG. 3 is a schematic perspective view showing another embodiment of the hull mounting portion for mounting the marine accident marker of the present invention on the hull. The hull mounting portion 21 of this example has a cylindrical or columnar shape, and the hull mounting portion 21 is inserted into the cylindrical extension portion 13a provided below the weight 13 of the marine accident marker 10 so that the marine accident The marker 10 is attached to the hull attachment portion 21 so as to be detachable upward and not horizontally movable. It should be noted that the extension 13a may be formed with a slit 13b as illustrated in order to facilitate attachment / detachment to / from the hull mounting portion 21.

Even in this case, as in the previous example, the marine accident marker 10 is normally fixed to the hull 1, but if the ship sinks or capsizes during the marine accident, the marine accident marker 10 is attached to the hull by the floats 12. It can be detached from the portion 20 and floated on the water surface. In addition, in the above-mentioned form, although it explained assuming the most frequent accidents on the sea, it is possible to use the marine accident marker of the present invention similarly for accidents occurring on the water such as ponds and lakes. Needless to say.

In each of the drawings, the insertion method for separating from the hull by buoyancy has been described as an example, but there are many supporting means for separating by buoyancy, which are included in the scope of the present invention.

[0019]

As described above, according to the present invention,
When the ship sinks or capsizes, it is a marker for marine accidents that consists of a radio wave reflector that separates from the hull and floats on the surface of the water, so it can function automatically without the need for a switch or the like. Is guaranteed. Since it is a passive type that reflects radar from a search aircraft, it does not require a power source and does not suffer from functional deterioration due to battery consumption. Also,
Since it utilizes the performance of the radio wave reflector itself, it is guaranteed to always function reliably without failure. Moreover, its structure is simple, small and inexpensive, and maintenance is almost unnecessary.

The marine accident marker can be used as a reference for saving the accident location. During normal voyages other than marine accidents, it can function as a radar radio wave reflector, thus improving safety. According to the second or third aspect of the invention, since the radio wave reflector has a large radar cross-sectional area as compared with its physical size, the probability of being captured by the radar of the search aircraft is extremely high. Become.

According to the fourth aspect of the present invention, the float can be surely levitated to the surface of the water, and the weight can vertically erect. According to the invention described in claim 5, when the ship sinks or capsizes, the marine accident marker can be reliably separated from the hull.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing an embodiment of a marine accident marker of the present invention.

FIG. 2 is a schematic perspective view showing another embodiment of the marine accident marker of the present invention.

FIG. 3 is a schematic perspective view showing another embodiment of the marine accident marker of the present invention.

FIG. 4 is an example in which the marine accident marker of the present invention is attached to a ship.

[Explanation of symbols]

 10 Marine Disaster Marker 11 Radio Wave Reflector 11a Luneberg Lens 12 Float 13 Weight 14 Support 15 Radio Wave Reflector (Corner Reflector) 20, 21 Ship Attachment

Claims (5)

[Claims] 1. A support body for supporting a radio wave reflector on an upper part and a radio wave reflector on a lower part, which is always installed on a hull, and when the ship sinks or capsizes, is detached from the hull and stands upside down. The marine accident marker is characterized by being exposed to the surface of the water. 2. The marine accident marker according to claim 1, wherein the radio wave reflector has a radio wave lens. 3. The marine accident marker according to claim 1, wherein the radio wave reflector is a corner reflector. 4. The support according to claim 1, 2 or 3, wherein the support has a float that supports the radio wave reflector and can float on the water surface, and a weight attached to the bottom of the float. The marine accident marker described. 5. The support according to claim 1, wherein the support is attached to a hull attachment part attached to the hull so as to be detachable in an upward direction and immovable in a horizontal direction.
The marine accident marker according to 3 or 4.