JPH054326Y2 - - Google Patents

Description

[Detailed description of the invention] A. Field of industrial application This invention consists of three circular first, second, and third veneers.
This invention relates to improvements in radar reflectors that are orthogonally combined.

B. Conventional technology Conventionally, in order to facilitate radar visibility from a navigating vessel, three orthogonal beams were placed on small vessels or light buoys, etc.
A corner reflector body made of a flat surface, or a radar reflector made by combining these bodies, such as a radar reflector made of three circular single plates assembled orthogonally, has been used and has been used with great success. All of these were assembled in three-dimensional precision at a factory.

C. Problems that the invention aims to solve However, when ships, fishing boats, etc. are in distress (about 2,000 vessels are in distress around Japan every year, and hundreds of people are dead or missing), lifeboats and life rafts are needed. Alternatively, people can escape using collapsible liferafts, but it is necessary to quickly find and rescue people in distress. To this end, these life rafts can be equipped with radar reflectors to make them easier to see on the radar of search and rescue ships. It is built-in, and there is no space to accommodate the assembled radar reflector. Also, the impact of landing in distress should not damage these built-in devices. Therefore, the radar reflectors installed in these devices must: (1) be able to be folded flat and be stored in an extremely small volume and compact;

(2) Even in the event of a disaster on rough seas, anyone can easily assemble the ship with accurate shape, particularly with accurate perpendicularity.

(3) The reflection directional characteristics of radar radio waves are as uniform as possible in all directions.

(4) The direction of attachment to the lifeboat and liferaft must be clearly separated.

(5) Do not injure people or damage the life raft or equipment during assembly work.

(6) It is necessary that there is no deformation or damage due to the impact of landing in the water.

The present invention is an assembly type radar reflector that solves these problems. The contents of the present invention will be explained in detail below with reference to the drawings.

D. Means for Solving the Problems FIG. 1 is a front view of a radar reflector after assembly showing one embodiment of the present invention, and FIG. 2 is a plan view thereof. In the figure, reference numeral 1 denotes a circular first plate material that is not as hard as a metal plate such as a resin-treated thick plate with aluminum foil pasted on its surface, corrugated paper, or a resin plate, but is sufficiently rigid and water resistant. Reference numeral 2 denotes a semicircular second plate member whose straight edges are connected to the same position on the diameter 1' line on both sides of the circular first plate member 1 so as to be able to rise and fall. 3
is a quarter-circular third plate member, one side of which is connected to a line with a diameter of 1″ perpendicular to the diameter 1′ of the circular first plate member 1 so that it can be raised and lowered.

Figure 3 is a detailed diagram showing the A-A view of Figure 1.
This shows how a semicircular second plate 2 is connected to a circular first plate 1, and the straight edge of the second plate 2 has a narrow constriction 4 at a distance of the plate thickness from the edge. It has a bendable and flexible hinge shape, and the end of the straight part is bonded to the surface of the circular first plate 1. Therefore, the semicircular second
When the board 2 is folded down, it can be stacked on top of the board 3. If the plate material 3 is extremely thin, a joint similar to that shown in FIG. 4, which will be described later, may be used.

FIG. 4 is a detailed view showing the BB view of FIG.
A situation in which a quarter circular plate 3 is connected to a circular first plate 1 is shown. 5 is the first edge of the third plate material 3
It is a flexible thin film that is connected to the plate material 1 in a hinge-like manner.

Figure 5 shows a third plate on the center line of the semicircular second plate 2.
A plan view showing an example of a means for locking the plate material 3 of
A small slit 6 having the thickness of the plate is provided at the center line of the second plate 2, and a small protrusion 7 that engages with the slit 6 is protruded from the edge of the third plate 3.

FIG. 6 shows another locking means, in which small protrusions 8 are provided to sandwich the edge of the third plate 3 across the center line of the second plate 2.

Further, small holes 9 and 9' are provided at the center line end of the second plate 2 and at the free end of the third plate 3, respectively, and both ends of the string 10 are inserted through the small holes 9 from both sides. ’.

FIG. 7 is a perspective view showing the radar reflector of the present invention in a folded state, and FIGS. 8 and 9 are perspective views showing the radar reflector in the middle of assembly and in the assembled state, respectively.

E. Function The radar reflector of the present invention is stored in a foldable life raft or the like in a folded state as shown in FIG. To fold, use the circular first
The third plate material 3 is laid down on both sides of the plate material 1, and the second plate material 2 is further folded on top of the third plate material 3, and the string 10 is extended to both sides.

In case of an emergency, to act as a radar reflector, by pulling the string 10 in both directions, the semicircular second plate 2 will stand up, and then the quarter-circular third plate will be attached on both sides. When the plate 3 stands up and is further pulled, the edge of the third plate 3 engages with the locking means such as the small protrusion 8, and the first plate 1, second plate 2,
The third plates 3 are assembled in a manner that they are fixed at right angles to each other, and function as a radar reflector.

This radar reflector consists of a three-dimensional assembly of eight radar reflector elements arranged in three orthogonal planes, and can be placed in any situation, such as on the floor of a life raft or suspended on the cover of a life raft. To correctly reflect incoming radio waves in the direction of arrival even when the signal is lowered.

Also, if it is hung with a hanging string as shown in Figure 10 or 11, the radar reflection directional characteristics will be
It has a four-petal or six-petal shape in the horizontal direction, making it easy to see by the radar of search and rescue ships.

F. Effects of the invention As configured as described above, the radar reflector of the invention has a quarter-circular third plate 3 and a semicircular second plate 2 on both sides of the circular first plate 1. It can be folded into a small flat circular volume with a thin thickness, and can be stored in the small volume of a folded inflatable life raft. In addition, it is lightweight as a plate material, and is not sharp like metal.
Because it is made of a rigid resin material, it will not be deformed or damaged by the impact of landing in the water, will not damage the life raft or lifesaving equipment, and will not injure people during assembly.

Next, in the event of a distress or emergency, by pulling the string 10 in both directions, anyone can assemble it very easily, accurately and quickly in one action as described above, and it will function as a radar reflector for a search and rescue ship. The radar makes it easy to see.

[Brief explanation of the drawing]

Fig. 1 is a front view of the radar reflector of the present invention after assembly, Fig. 2 is a plan view thereof, Fig. 3 is an enlarged view of the A-A view in Fig. 1, and Fig. 4 is an enlarged view of the radar reflector of Fig. 2. B-B
The perspective view, FIG. 5, is a view taken along the line CC in FIG. 1, and shows an example of a means for locking the second plate 2 and the third plate 3. 6th
The figure is a plan view showing another locking means. Figures 7 and 8
FIG. 9 is a perspective view showing the state from the folded state to the assembled state. FIGS. 10 and 11 are perspective views of the assembled radar reflector suspended from a life raft or the like to function. 1...Circular first plate material, 2...Semicircular second plate material
Board material, 3... Quarter circular third board material, 4...
... Constriction, 5 ... Flexible thin film, 8 ... Small protrusion,
9...small hole, 10...string.

Claims (1)

[Claims for Utility Model Registration] In a radar reflector in which three circular first, second, and third plates each having a radar reflecting surface are assembled orthogonally to each other, both sides of the circular first plate 1 Diameter at the same location
The straight edges of two semicircular second plates 2 are connected on line 1' so that the bending points are at a position above the thickness of the plates, allowing both sides of the circular first plate 1 to be folded up and down. A quarter-circular third plate 3 is placed on a line with a diameter of 1" perpendicular to the diameter 1' of the
Each side of each of the four plates is connected to each other so as to be freely raised and folded, and a locking means for locking each free side of the third plate 3 is provided at the center line of both sides of the second plate 2, and the first plate 1 One end of the string passed through the small hole provided at the center line end of the second plate 2 is locked to each free side end of the third plate 3 on both sides of the A radar reflector that can be assembled in one motion by pulling the ends.