JP2001177335A - Corner reflector for reflecting radio waves - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a corner reflector for reflecting radio waves that has satisfactory performance level of reflecting radio waves, such as a radar radio wave in every directions, is shaped to circulate a circumferential face of a cylindrical pole such as a mast of a ship and a support of an object installed on sea and offers ease and sure mounting and fixing. SOLUTION: Each of corner reflector single units is formed, such that two thin and long main plates at least one side of which is formed to be a radio wave reflecting face are made orthogonal at long sides of the two thin and long main plates and integrally coupled, a uniform gap is left between the two sides of the plates opposite to each other in the length direction, and partition plates at least one side of which is formed to be a radio wave reflecting face are fixed between the two plates. Then a plurality of the corner reflector single units is fixed to the circumferential face of the cylindrical pole, such as a mast around the circumferential face.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mainly applied to a mast of a ship, a marine installation or the like, a column such as a column,
The present invention relates to an improvement of a radio wave reflection corner reflector that can reliably reflect radar radio waves and the like from four directions.

[0002]

2. Description of the Related Art A corner reflector for radio wave reflection, which is attached to a mast of a ship or a pole of a marine installation, mainly reflects radar radio waves, and specifies the position of the ship or marine installation, is already available in various structures. Although they have been proposed and put into practical use, most of them have a form in which a lump is fixed with a string or the like, and thus there is a possibility that the direction of radio wave reflection becomes unstable.

In order to eliminate the instability of the radio wave reflection direction, corner reflectors are arranged in a cylindrical body in four circumferential directions, and the cylindrical reflector formed at the center of the cylindrical body is used for supporting columns or the like. A mast with a structure that is to be inserted or a group of long-cornered reflectors
The thing of the structure tied to a support etc. is proposed,
The former has significant limitations on the applicable strut thickness,
The latter has a problem that it is difficult to stabilize the mounting posture although the reflection area can be increased.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the conventional corner reflector for radio wave reflection, the present invention has a stable radio wave reflection function in all four directions and furthermore, has a mast of a ship, It can be easily and securely fixed to the entire outer periphery of the mounting part such as a post such as a marine installation, and the difference in the thickness of the mast, the post, etc. can be used in principle in the circumferential direction of a single corner reflector alone. It is an object of the present invention to provide a corner reflector for radio wave reflection that can respond to a change in the number.

[0005]

In order to solve the above-mentioned problems, according to the first aspect of the present invention, a radio wave reflecting corner reflector is formed of two elongated main plates each having at least one of the front and rear surfaces being a radio wave reflecting surface. The two long sides are orthogonally and integrally joined, and the two main surfaces facing each other at an opening angle of 90 degrees are at equal intervals in the length direction. A diaphragm whose one surface is a radio wave reflecting surface is fixed to form a corner reflector alone, and a plurality of the corner reflectors are formed on the outer peripheral surface of a cylindrical body, and the length direction of the unit is a cylinder. The outer peripheral surface is fixed so as to make a round in the direction of the generatrix of the body.

According to the second aspect of the present invention, there is provided a configuration in which the adjacent corner reflector has a joint portion on the free long side of the elongated main plate with the free long side of the elongated main plate of the adjacent corner reflector. Added to the invention.

According to a third aspect of the present invention, a configuration is added to the second aspect of the present invention in which the joining portion has a rotatable joining structure having a pivot axis in the longitudinal direction of the corner reflector itself.

According to the fourth aspect of the present invention, there is provided a constitutional requirement that each of the corner reflectors has a structural member fixed to the columnar body, which protrudes in the longitudinal direction from the upper and lower ends of the connecting portion of the two elongated main plates. It is added to the invention of claim 1, claim 2 or claim 4.

[0009]

FIG. 1, FIG. 2, FIG. 3, and FIG. 4 show a first embodiment to which both the first and fourth aspects of the present invention are applied. sex,
The two elongated main plates 1 and 2 each made of a lightweight synthetic resin plate having water resistance and toughness and having at least one of the front and rear surfaces serving as a radio wave reflecting surface which is a metal surface such as an aluminum vapor-deposited film have long sides 3 , 4 are orthogonal to each other to form two surfaces 5 and 6 that face each other at an opening angle θA of 90 degrees and are integrally connected.

The two surfaces 5, 5 and 6 are arranged at equal intervals W in the longitudinal direction at a plurality of positions, three positions in the illustrated example, at right angles to the surfaces 5, 6 and at least one of the front and back surfaces. A diaphragm 7 whose surface is a radio wave reflecting surface like the elongated main plates 1 and 2;
8 and 9 are fixed to form a corner reflector unit 10.

In the embodiment shown in FIG. 1 and FIG. 4, the corner reflector unit 10 has five corner reflector units 10 on the outer peripheral surface of a cylindrical body 11 which is a mast of a ship.
The length direction of the single body 10 is aligned with the direction of the generatrix L of the columnar body 11 and is fixed around the outer peripheral surface once to form a corner reflector 100 for radio wave reflection.

Each of the corner reflectors 10 has a fixed structural member 13 protruding in the longitudinal direction from the upper and lower ends of the connecting portion 12 of the two elongated main plates 1 and 2.

In the illustrated example, a metal rod 14 fixedly penetrating through each of the partition plates 7, 8, 9 is used as the fixing structural member 13 in the connecting portion 12, but is fixed on the peripheral surface of the cylindrical body 11 such as a mast. It may be an arcuate plate that abuts.

In the illustrated example, as shown in FIG. 1, a fixing structure member 13 such as five metal rods 14 abutting on a surface of a cylindrical body 11 such as a mast is fixed to a mast or the like by an adhesive tape 15 having a strong adhesive force. Fixed to the surface of the cylindrical body 11 of
It is constituted by a plurality of corner reflectors 100 for radio wave reflection.

In the embodiment shown in FIG.
The three metal rods 14 are fixed to the surface of the cylindrical body 11 with an adhesive tape. The metal rods 14 are fixed to the surface of the cylindrical body 11 as shown in FIGS. A structure or rope in which a fitting hole 17 for a metal rod 14 is inserted through a short circular ring 16 which has been externally fitted to and fixed in advance, and the upper and lower ends of the metal rod 14 are fixedly supported by the short circular rings 16 at two upper and lower positions. Or other means such as binding.

The free long sides 1 of the elongated main plates 1 and 2 constituting the corner reflector unit 10 shown in FIGS.
When fixed to a cylindrical body 11 such as a mast as shown in FIGS. 1 and 4, 8 and 19 remain adjacent to the free long sides 18 and 19 of the elongated main plates 1 and 2 of the adjacent corner reflector unit 10. However, in order to increase the rigidity against strong winds or the like, it is better to join them together by a joint according to the invention of claim 2, and as shown in FIG.
The joint 20 may be formed by a nut, or may be a joint 21 formed by overlapping arc edges as shown in FIG.

In order to make the joining portion 21 shown in FIG. 8 more rigid, a tubular elastic clip 21A shown in FIG. 9 or a tubular elastic clip 21B shown in FIG. 10 may be used.

A large number of cylinders 11 such as masts having the same thickness.
When fixing the radio wave reflecting corner reflector 100 composed of the corner reflectors 10 of the same standard, a predetermined number of the corner reflectors 10 are previously attached to the free long sides 18, 1, 1 of the elongated main plates 1, 2.
If the free long sides of the corner reflectors 10 at both ends to be joined are not connected, the corner reflectors for radio wave reflection connected in a plate shape are moved to the column 11 such as a mast. Carry in, cylindrical body 1
The corner reflector for radio wave reflection can be assembled in a short time only by wrapping around and fixing to one.

The third aspect of the present invention relates to a joining structure of free long sides 18 and 19 of the elongated main plates 1 and 2 enabling the assembling of the radio wave reflecting corner reflector 100 as described above. FIG. An example of the implementation is shown.

In FIG. 11, the knuckles 22A, 23A, 22B, and 2B that form hinges on the free long sides 18A, 19A, 18B, and 19B of the slender main plates 1A, 2A, 1B, and 2B of the corner reflectors 10A and 10B, respectively.
3B is formed, and the pin shaft 24 is inserted into a row of the assembled knuckles 22A and 23B and is locked by a fixing tool such as a bolt / nut 25 so as not to be pulled out.
Are the turning axes in the longitudinal direction of the corner reflectors 10A and 10B, and both corner reflectors 10
A and 10B are joined by a joining structure that is rotatable in the directions of arrows X and Y.

The radio wave reflecting corner reflector 100 shown in FIGS. 1 and 4 is composed of five corner reflectors 10C, 10D, 10E, 10F and 10G, but as shown in FIG. Reflector alone 10H, 10I, 10J, 10K, 10
One set of L and 10M corner reflectors for radio wave reflection 1
00, and the size of each corner reflector alone according to the diameter of the cylindrical body 11 such as a mast,
The number of corner reflectors used alone for one radio wave reflection corner reflector is selected.

[0022]

According to the first aspect of the present invention, at least one of the front and back surfaces is a radio wave reflecting surface such as a radar.
A long and slender corner reflector with a plurality of radio wave reflection parts whose surface plates are orthogonal to each other,
Since a plurality of cylinders, such as a mast of a ship and a column of a marine installation, are partially fixed around a part of the peripheral surface, a radio wave reflection function in all directions can be exhibited, and a radio wave reflection corner reflector of a lump can be used. This has the effect of eliminating instability in the direction in which radio waves are reflected, such as those that are secured with a string or the like.

Further, by selecting the circumferential dimensions of the mast and the like of the corner reflector alone, it is possible to cope with the diameter of the cylindrical body such as the mast and the support, so that the object to which the radio wave reflection corner reflector can be attached can be greatly expanded. is there.

According to the second aspect of the present invention, the individual corner reflectors constituting the radio wave reflection corner reflector are joined to each other on the free long side of the elongated main plate, so that the ship, the marine installation, etc. Even when exposed to waves, the coupling strength between the corner reflectors becomes large, and the strength of the radio wave reflection corner reflector is remarkably improved.

According to the third aspect of the present invention, the joining portion for joining the free long side of the elongated main plate of the corner reflector unit employed in the second aspect of the invention to the free long side of the adjacent elongated main plate is formed by the single unit. In the structure in which adjacent corner reflectors are connected by a hinge structure at a free long side of an elongated main plate, as shown in FIG. 4 or FIG. When the connection of one hinge structure is released, all the corner reflectors can be unfolded on a plane while being arranged in parallel.

Therefore, it can be maintained in an expanded state or in a rolled-up state until it is fixed to a mast, a column or the like as a corner reflector for radio wave reflection. Advantageously, the installation work at the work site is facilitated, and the number of installation steps can be reduced.

According to the invention of claim 4, the mast of the ship,
To fix the radio wave reflecting reflector to the post or the like of the marine installation, fix the fixed structural member such as a metal rod that protrudes in the length direction from the upper and lower ends of the connecting portion of the two elongated main plates of the corner reflector alone with the mast, the post The effect can be obtained in a short time by a simple and powerful means such as winding adhesion with an adhesive tape on the outer peripheral surface or binding by winding and binding a rope.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a fixed state to a columnar body according to an embodiment.

FIG. 2 is a perspective view of an example of a corner reflector alone.

FIG. 3 is a cross-sectional view orthogonal to the length direction of the one shown in FIG. 2;

FIG. 4 is a cross-sectional view orthogonal to the columnar body of the one shown in FIG.

FIG. 5 is a plan view of an example of a fixing tool for a corner reflector alone.

FIG. 6 is a side view of what is shown in FIG.

FIG. 7 is a cross-sectional view of an example of a joint structure between free long sides of an elongated main plate of a corner reflector alone.

FIG. 8 is a cross-sectional view of another embodiment of a joint structure between free long sides of an elongated main plate of a corner reflector alone.

9 is a cross-sectional view of another embodiment of the joining structure shown in FIG.

FIG. 10 is a cross-sectional view of still another embodiment of the joining structure shown in FIG. 8;

FIG. 11 is a schematic perspective view of still another embodiment of a connection structure between free long sides of an elongated main plate of a corner reflector alone.

FIG. 12 is a cross-sectional view similar to FIG. 4 of a different embodiment.

[Explanation of symbols]

 1, 2 Slender main plate 3, 4 Long side 5, 6 Opposite two surfaces 7, 8, 9 Separator plate 10 Corner reflector unit 11 Cylindrical body 12 Joining part 13 Fixing structural member 18, 19 Free long side 20, 21 Joining part 100 Corner reflector for radio wave reflection

Claims (4)

[Claims] An elongated main plate having at least one of its front and back surfaces serving as a radio wave reflecting surface is integrally formed such that a cross section orthogonal to the long side is L-shaped. The elongated main plate is connected at two positions facing each other at an opening angle of 90 degrees. At two or more places having equal intervals in the length direction, at least one of the front and back surfaces is orthogonal to each surface and the radio wave reflecting surface is provided. Is fixed to form a single corner reflector, a plurality of the single corner reflector,
A radio wave reflecting corner reflector fixed to the outer peripheral surface of the cylindrical body such that the length direction of the single body coincides with the generatrix direction of the cylindrical body so as to make a round around the outer peripheral surface. 2. The corner reflector for radio wave reflection according to claim 1, wherein the adjacent corner reflectors have a joint at a free long side of the elongated main plate with a free long side of the elongated main plate of the adjacent corner reflector. 3. The corner reflector for radio wave reflection according to claim 2, wherein the joining portion has a rotatable joining structure having a pivot axis in the longitudinal direction of the corner reflector alone. 4. A single corner reflector protrudes in a length direction from upper and lower ends of a connecting portion of two elongated main plates.
4. The corner reflector for radio wave reflection according to claim 1, further comprising a structural member fixed to the cylindrical body.