JPS641773Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to improvements in radar reflectors.

In general, in buoys, small ships, etc., which have a weak reflection intensity against radar radio waves, radar reflectors combined with metal conductors have been conventionally installed in order to improve so-called radar visibility.

In particular, recently, small FRP boats and buoys have been used frequently, and it has become common sense to equip them with radar reflectors for the purpose of ensuring safe navigation at sea.

However, conventional radar reflectors have been corner reflectors constructed by assembling triangular metal veneers into a triangular pyramid shape by welding or riveting, as shown in FIG.

Although these radar reflectors have good radio wave reflection efficiency, they are difficult to assemble accurately because they are assembled using methods such as welding or riveting. Accurately combining them requires advanced technology, which has the drawback of making productivity poor and expensive.

In addition, since it is shipped as a finished product from a factory, special care must be taken when handling it after assembly to avoid damaging the edges and surfaces of the reflector, and it takes up a large amount of space when stored. Even when transporting the products, the packaging was large and voluminous, requiring complicated labor and high costs.

The present invention is directed to providing a radar reflector that eliminates these conventional drawbacks.

The radar reflector according to the present invention is a radar reflector that can be easily assembled on site by fastening two types of parts, the reflector body and the trapezoidal radio wave reflecting plate that also serves as a connecting plate, with fasteners such as bolts. The present invention provides a radar reflector that has a small number of types, can be mass-produced, has high productivity, has high assembly accuracy, and is more compact and requires less space, labor, and cost for storage and transportation than conventional products.

This will be described in detail below with reference to embodiments shown in the drawings.

FIG. 3a is a plan view showing an example of a reflector body 1 made of one metal plate according to the present invention.

As shown in the figure, the reflector body 1 includes a triangular radio wave reflecting plate part 1a, which is continuous to the base of the triangular radio wave reflecting plate part and is inclined at 135 degrees from the reflecting plate part.
_Reflector mounting part 1b (third
(see Figure b), and a reflector body connection flange 1c consisting of a plane of width W ₂ that is continuous with this mounting part and inclined 135 degrees from the mounting part (see Figure 3b).
Consisting of

Fasteners such as bolts are fitted in upper and lower corresponding positions of the flange 1c of the reflector body 1 and the triangular radio wave reflecting plate portion 1a to connect adjacent reflector bodies when assembled. An insertion hole 3 is drilled. In addition, the triangular radio wave reflecting plate part 1
A hole 3' for inserting a fastener such as a bolt for fastening the trapezoidal radio wave reflecting plate 2 which also serves as a connecting plate is drilled on a line f parallel to a perpendicular line e drawn from the top angle of a to the bottom side. Furthermore, bolt holes 5 for fastening the reflector support rod 4 are bored at the top and bottom of the reflector mounting portion 1b. (In this example, the reflector support rod 4 is assumed to be a long rod with a square cross section and a side length W ₁ ' which is slightly smaller than W ₁ (see Fig. 1a)). The two outward edges of the radio wave reflecting plate portion 1a are bent as shown in FIG. 3c in order to reinforce the reflector body 1 and to prevent the edges from becoming sharp.

FIG. 4a shows the plane of the trapezoidal radio wave reflecting plate 2 which also serves as a connecting plate made of one metal plate, and the two sides facing the triangular radio wave reflecting plate portion 1a of the reflector body 1 are flanges, respectively. 2a is formed by bending the edges as shown in FIG. 4b. A connecting hole 6 corresponding to the hole 3' (see FIG. 3a) on the f-line of the triangular radio wave reflecting plate 1a is bored in the surface of the flange 2a.

The drilling position of the hole 6 is determined by a line passing through the surface of the trapezoidal radio wave reflector 2 when the trapezoidal radio wave reflector 2 is attached to the triangular radio wave reflector 1a of the reflector body 1.
The relationship is made to coincide with the line e in the reflection plate portion 1a.

The free edge facing outward of the trapezoidal radio wave reflector 2 is bent as shown in FIG. let

In the reflector according to the present invention, four reflector bodies 1 and four trapezoidal radio wave reflecting plates 2 each configured as described above are arranged and coupled as shown in FIGS. 1a and 1b. That is, the reflector body 1 is arranged radially around the vertical axis at equal angular intervals with the surface of the triangular radio wave reflecting plate portion 1a being vertical and the apex angle facing outward, and adjacent flanges 1c and The back surface of the triangular radio wave reflecting plate portion 1a is fastened with a fastener 7 to form four reflector bodies 1 into one body.

Next, the trapezoidal radio wave reflecting plate 2 is inserted between the adjacent triangular radio wave reflecting plate parts 1a, and the flange 2a and the reflecting plate part 1a are connected with the fastener 8 to complete the radar reflector.

The fasteners 7 and 8 may be standard bolts, nuts, and locking washers that are easily available in the general market, and can be easily obtained and handled at low cost.

The radar reflector of this invention has two component parts.
Only a few types of items are required, and all can be mass-produced with high dimensional accuracy through press processing.
Productivity is high, the quality is consistent, the weight is extremely light by using aluminum material, and it can be provided at a low price.

Furthermore, since it can be assembled on-site, the components, namely the radar reflector body 1 and the trapezoidal radio wave reflecting plate 2, can be assembled during storage or transportation at a factory or on-site. Any number of these parts can be stacked and handled, and even one completed radar reflector can be handled as a part with a volume that is almost the same as the volume of one reflector body 1 , so it does not take up much space. Moreover, it is easy to pack, there is little risk of damage, and management costs, packaging costs, and transportation costs can all be lower than conventional methods.

Although the reflector body 1 and the trapezoidal radio wave reflecting plate 2 are made of metal plates, they may be made of conductive plated plastic plates. In addition, although the case where the reflector support rod 4 is square in cross section is used in the explanation, when using a support rod with a circular cross section, the mounting part 1b of the reflector body 1 is adjusted to the outer diameter of the support rod, and the shape is shaped like a quarter arc. Needless to say, it would be better to use it as a.

[Brief explanation of drawings]

Fig. 1a is a perspective view showing an example of an assembled radar reflector according to the present invention, Fig. 1b is an explanatory view showing its configuration seen from above, Fig. 2a is a front view, and Fig. 2b is a 3a is a plan view of the reflector body 1 , FIG. 3b is a sectional view taken along the line E--I of FIG. 3a, FIG. Figure a is a plan view of the trapezoidal radio wave reflecting plate 2 which also serves as a connecting plate, and the fourth
Figure b is a cross-sectional view of Figure 4a, and Figure 4c is a cross-sectional view of Figure 4.
FIG. 5 is a perspective view of a conventional triangular pyramid radar reflector. 1 ...Reflector body, 1a...Triangular radio wave reflecting plate part, 1b...Reflector mounting part, 1c...
Reflector connection flange, 2... Trapezoidal radio wave reflecting plate, 2a... Flange, 3, 3', 5, 6...
Holes, 7 , 8 ... fasteners.

Claims (1)

[Scope of utility model registration request] A triangular radio wave reflecting plate part 1a, and a part that is continuous with the bottom side of the triangular radio wave reflecting plate part and from the reflecting plate part.
A reflector mounting portion 1b consisting of a surface with an appropriate width inclined at 135 degrees, and a reflector body connection flange 1c consisting of a surface continuous with this attachment portion 1b and having an appropriate width inclined at 135 degrees from the attachment portion. The four reflector elements 1 are arranged radially around the vertical axis at equal angular intervals, with the triangular radio wave reflecting plate part 1a being vertical and the apex angle facing outward.
The triangular radio wave reflecting plate portion 1a of the reflector element body 1 adjacent to the flange 1c of each reflector element body 1
The triangular radio wave reflecting plates 1a of adjacent reflector bodies 1 are further threadedly coupled via the trapezoidal radio wave reflecting plate 2 on a line connecting their apex angles. Assembly type radar reflector.