JPH0453043Y2 - - 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 circular single plates are orthogonally assembled.

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 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 ships are lost 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) 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 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 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 second circular veneer 2 is inserted orthogonally into the circular veneer 1, and the semicircular veneer 3 is inserted from both sides to complete the process.

Figure 3 is a plan view of the first circular veneer 1, which is not as hard as resin-treated cardboard with aluminum foil pasted on its surface, corrugated paper, or metal plates such as resin plates, but it is sufficiently rigid and waterproof. A straight slit 4 reaching the center is provided in a certain circular veneer, and a semicircular veneer 3 is provided on both sides of a straight line 5 that is orthogonal to the slit at the center.
A locking hole 6 for inserting a locking piece is bored. This 2
The assembly positions of the semicircular veneers are shifted to both sides of the straight line 5, so that even if the locking pieces protrude, they do not touch each other.

FIG. 4 is a plan view of the second circular veneer 2, in which a slit 4' reaching the center is provided, and a straight slit 4 into which the semicircular veneer 3 is inserted on both sides of a straight line 5' that intersects perpendicularly to the slit 4' at the center. One slit 4'' is provided from each end edge of the circular single plate. These two slits 4'' correspond to the positions of the locking holes 6, and are offset on both sides of the straight line 5'.

Figure 5 is a plan view of the semicircular veneer 3, with a slit 4 extending perpendicularly to the straight line 5'' from the center of the straight edge 5''.
A locking piece 7 is provided which protrudes from the straight edge and is inserted into and locked into the locking hole 6 of the veneer 1. A plurality of the locking pieces are provided at asymmetric positions with the center interposed therebetween.

E. Function By inserting and assembling the individual veneers formed as described above into each other according to the procedure shown in FIG. 2, the assembled radar reflector shown in FIG. 1 is completed. This prefabricated 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 elements, and its radar reflection directivity is three-dimensionally arranged in eight directions. oriented towards. 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. Embodiment FIG. 6 is a detailed view of section A in FIG. 5, and is a plan view of the locking piece 7, each of which has a hook-shaped portion 8 for preventing it from coming off on the center side. The locking piece 7 may have any shape as long as it is firmly inserted and fixed into the locking hole 6, but if it is shaped as shown in the figure, it will be firmly fixed and will not easily come off.

In order to insert and fix each veneer into each slit, the slit width of each insertion slit may be equal to or slightly narrower than the thickness of the veneer, so that the veneer can be pushed in strongly and firmly fixed by friction. Alternatively, as shown in Figure 7, by making a shallow recess equal to the width of the board thickness at the position where it will be inserted into the slit in the veneer, and providing a matching slit, it can be fixed even more firmly.

Furthermore, if the veneer material is resin cardboard with aluminum foil, it becomes an extremely lightweight and durable assembly type corner reflector.

Further, as shown in Fig. 8, a small hole is bored in the center of each of the three arcuate edges of one reflective opening, and a suspension cable having three branch cables 9' of equal length is inserted into the small hole. 9
If you lock the tip of the branch cable 9' (with an S-shaped ring) and hang it, the six corner reflector bodies of this assembled radar reflector will be spread evenly on almost all sides. The reflection directional characteristics will be as shown in FIG. 9 (the directional characteristics are shown by the dashed line), and almost all horizontal directions can be covered.

Effects As described above, by inserting slits into each veneer, anyone can assemble it without hesitation in any emergency by looking at the assembly instructions diagram.
Each single plate is assembled at right angles accurately and reliably to form a radar reflector with eight corner reflector bodies. In addition, the two semicircular veneers have insertion slits 4
Since the locking holes 6 are at least different in plate thickness across the straight lines 5' and 5, the locking pieces do not come into contact with each other. Also, if the positional deviation is about the thickness of the board,
There is no problem with the function of the corner reflector.

In addition, the outer periphery of this assembled radar reflector is circular, the material is not hard and sharp like a metal plate, and it does not damage the life-saving machines built into the life raft when folded together. There is no harm to the human body during assembly. In addition, each veneer can be stacked and placed in a bag with assembly instructions written on it, and it can be easily stored in a foldable life raft, and it will not be deformed or damaged by the impact of being lost or landing on water. It functions properly as a reflector.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the assembled radar reflector of the present invention after assembly, Figure 2 is an assembly procedure diagram, and Figures 3-
Figure 5 is a plan view of each veneer, Figure 6 is a detailed diagram showing an example of a locking piece, Figure 7 is a detailed diagram showing an example of a slit section, and Figure 8 is a detailed diagram showing an example of a slit section. FIG. 9 is a plan view showing the radar reflection directional characteristics in the horizontal direction of the assembled radar reflector of the present invention. 1...First circular veneer, 2...Second circular veneer, 3...Semicircular veneer, 4, 4', 4'', 4...
Slit, 6...locking hole, 7...locking piece.

Claims (1)

[Claims for Utility Model Registration] In a radar reflector in which three circular veneers each having a radar reflective surface are combined orthogonally to each other, the first circular veneer 1 is provided with a straight slit 4 reaching the center, Along both sides of a straight line 5 perpendicular to the slit 4 at the center, locking holes 6 for inserting locking pieces of two semicircular veneers 3, which are perpendicular to the veneer 1 with the veneer 1 in between, are drilled. , the second circular veneer 2 is provided with a straight slit 4' that reaches the center, and the semicircular veneer 3 is inserted along both sides of a straight line 5' that is orthogonal to the slit 4' at the center. are provided one each from both ends of the circular veneer 2, and each of the two semicircular veneers 3 is provided with a straight slit 4 from the center perpendicular to the edge straight line 5'',
A plurality of locking pieces 7 that are inserted and locked into the locking holes 6 of the first circular veneer 1 are protruded from the straight edge at positions asymmetrical with respect to the center, and three arcuate pieces of one reflective opening are provided. A small hole is drilled in the center of each end edge, and a suspension cable having three branch cables of equal length is hung in the small hole by locking the tips of the three branch cables. Features a prefabricated radar reflector.