JPH0427209Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to an improvement of a radar reflector in which three plates having radar reflecting surfaces are combined in an orthogonal manner.

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 that is a combination of such bodies, for example a radar reflector made of three circular single plates assembled orthogonally, has been used and has been used with great success. All of these pieces were assembled in a factory with three-dimensional precision.

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 our country every year, and hundreds of people are dead or missing), lifeboats and life rafts can be used. 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, these equipped radar reflectors must: (1) be able to be folded flat and be stored in an extremely small volume and compact;

(2) Anyone can easily assemble the product into an accurate shape, especially at right angles, on rough seas during a shipwreck.

(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 or liferaft must be clearly visible.

(5) Do not injure people or damage life-saving rafts and life-saving 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 problem Figure 1 is a perspective view of the assembled radar reflector of the present invention after assembly, and Figure 2 is an assembly procedure diagram.
The locking piece 5 is inserted perpendicularly to the second plate 2 into the plate 1, and the third plate 3 is inserted from both sides to complete the process.

Figure 3a shows the plane of the first plate 1, which is not as hard as resin-treated cardboard with aluminum foil attached to the surface, corrugated cardboard, or metal plates such as resin plates, but is sufficiently rigid and water resistant. be. The first plate 1 is divided into two by a first straight line 1' passing through its center O,
Furthermore, it is foldably hinged at the dividing line 1'. Alternatively, the center O parts can be overlapped and joined at the eyelet, and one of the boards can be turned 180 degrees around the eyelet and folded in half.

Two second straight lines 1'' passing through the center O of the plate 1 and intersecting the first straight line 1' at 45 degrees and perpendicular to each other are provided on the first plate 1, and along the second straight lines 1'', A plurality of locking holes 4 are provided on both sides thereof, into which locking pieces 5 of the second plate material 2 and the third plate material 3 are inserted and locked.

Figures 3b and 3c are A-A views of Figure 3a, showing the hinge-shaped joint of the plate material 1, and Figure 3b shows the hinge-shaped joint of the plate material 1 with a flexible thin film. thing, third
Figure c shows an example in which the first plate 1 is provided with grooves so that it can be folded along the first straight line 1'.

4 and 5 are plan views of the second plate material 2 and the third plate material 3, each of which is divided at the first intersection line with the first plate material 1, and the first plate material is attached to each dividing edge. A locking piece 5 is provided protrudingly to be inserted and locked into the locking hole 4 of the first plate, and the second plate 2 and the third plate 3 are provided with slits 2' and 3' at the second intersection line between the two plates. , insert the slit and assemble.

FIG. 6 is an enlarged view of section A in FIG. 5, showing details of the locking piece 5. The locking piece 5 is provided with a hook-shaped portion 6 on its center side to prevent it from coming off. A plurality of locking pieces are attached to each divided edge at asymmetric positions with the center sandwiched therebetween. Also,
Matching marks (not shown) shall be placed at each plate edge and at the locking location.

E. Function Each plate material formed as described above is stored in a small bag. The plate material 1 is folded in half, and all the other plate materials are stacked on top of each other in a plane shape to form a small volume with a thickness of six plates. Normally, it is stored in this state along with life-saving equipment in a foldable life raft or the like.

In case of emergency, remove the board from the bag and
By inserting and assembling them into each other according to the procedure shown in the figure, the assembled radar reflector shown in FIG. 1 is completed. This assembled radar reflector can be assembled into three orthogonal planes, and the radar reflecting surface on its surface makes it a combined radar reflector with eight corner reflector bodies, and its radar reflection directivity is three-dimensionally 8.
oriented in a direction. Therefore, no matter what position the radar is placed in, radar radio waves from almost any direction will be reflected in the direction of arrival.

F. Example The above explanatory drawings have shown plates with circular plate shapes. However, it is of course not limited to a circular shape. Each plate may be rectangular as shown in FIG. Rectangular shapes have better yields even if plates of the same diameter are used, and a larger reflective area can be obtained. In this case, the corners of the board should be rounded to avoid damaging other equipment.

Next, since the protruding position of the locking piece 5 is made asymmetrical with respect to the center O, as can be seen from FIG. In this case, the locking holes 4 shown in FIG. 3a can be arranged at approximately equal intervals, which is reasonable. Further, since the hook-shaped portion 6 is provided on the locking piece 5, once assembled, it will not come off even in the event of a shock during a disaster, and will function satisfactorily as a radar reflector.

Also, as shown in Fig. 8, a small hole 8 is made in the center of each of the three plain surfaces of one reflective opening, and the tips of three branch cables 7 of equal length are locked and hung (the cover of the liferaft). etc.), the six corner reflector elements of the assembled radar reflector will be oriented radially evenly in almost all directions, and the radar reflection directional characteristics will be as shown in Figure 9. , almost all horizontal directions (directivity characteristics are shown by dashed lines) can be covered.

In addition to these three branch cables 7, two branch cables 7' with extra length are used to connect other second plate material 2 and third plate material 3.
If these are connected one by one, all the plank members will be connected by the slings, and there is no risk of losing valuable members on a chaotic life raft. Furthermore, if these plate ropes are tied together in a bundle with a ring 9 as shown in the figure, it will be convenient when hanging the ropes.

G. Effect By folding the first plate 1 in half and making the second plate 2 and third plate 3 into half shapes as described above, when stored in a life raft etc., the planar shape is It fits in a small volume that is half the size of a board, making it easy to store. In addition, in case of an emergency, anyone can easily assemble it by taking it out of the bag and looking at the assembly instructions, markings, etc. It becomes a radar reflector with eight corner reflector bodies, and can be placed on the floor of a life raft, etc. The radar reflector function is fully demonstrated by the radar reflector, making it easy to see the search and rescue ship's radar.

In addition, the external shape of this assembled radar reflector is circular or rounded, and the material is not hard and sharp like a metal plate, so it will not damage the life saving equipment built into the life raft when folded together. Also, the human body will not be injured during assembly.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the prefabricated radar reflector of the present invention after assembly, Fig. 2 is an assembly procedure diagram, and Figs.
Figures 3b and 3c are A-A views of Figure 3a, showing examples of hinge joints, and Figure 6 is a detailed view of part A in Figure 5. , FIG. 7 is a perspective view showing another embodiment of the assembled radar reflector of the present invention, FIG. 8 is a perspective view of the assembled radar reflector suspended from a hanging string, and FIG. 9 is a plan view thereof. A top view of the radar reflection directional characteristics in the direction. 1...First plate material, 2...Second plate material, 3...
Third plate material, 4... locking hole, 5... locking piece.

Claims (1)

[Claims for Utility Model Registration] 1. In a radar reflector in which three plates each having a radar reflecting surface are assembled orthogonally to each other in a cross shape, a first straight line 1' passing through the first plate 1 and the center O;
two second straight lines that pass through the center O of the first plate and intersect with the first straight line 1' at 45° and are orthogonal to each other. 1'' on the first plate 1, and a second plate 2 on both sides along the second straight line 1''.
A plurality of locking holes 4 are provided for inserting and locking the locking pieces of the third plate material 3, and the second plate material 2 and the third plate material 3 are each divided at the first intersection line with the first plate material. A locking piece 5 that is inserted and locked into the locking hole 4 of the first plate material 1 is protrudingly provided on each dividing line, and the second plate material 2 and the third plate material 3 are connected to each other by the second plate material. A prefabricated radar reflector characterized by having slits on each intersection line and inserting the slits. 2. The assembly type radar reflector according to claim 1 of the utility model registration claim, in which the outer shape of the plate material is circular. 3. The assembled radar reflector according to claim 1 of the utility model registration claim, in which the outer shape of the plate material is rectangular with rounded corners. 4. The prefabricated radar reflector according to claim 1, in which the protruding position of the locking piece 5 is asymmetric with respect to the center O. 5. The assembly type radar reflector according to claim 1, wherein each of the locking pieces 5 is a locking piece having a hook-shaped portion 6 for preventing slipping off on the center side. 6. Drill a small hole in the center of each of the three plain surfaces of one reflective aperture, and lock the tips of the three branch ropes in the small holes with a suspension cable having three branch ropes of equal length. An assembled radar reflector according to claim 1 of the utility model registration, which is configured to be suspended. 7. The assembly type radar reflector according to claim 6, which is a registered utility model, and further includes two branch cables with extra length, and two other plate members are also secured to the ends of the branch cables.