JPH028412Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to the structure of a buoy float having a built-in antenna.

[Prior art]

Fig. 1 is a perspective view of a buoy with a conventional float attached, and Fig. 2 is an enlarged sectional view thereof. In the figure, 1 is the buoy body, 2 is the float, 3 is the antenna radiator,
4 is a ground wire, 5 is a feeder line, 6 is a float housing, A is the height of the radiator 3, B is the height of the ground wire 4, C
indicates the width between the ground lines 4.

When installing an antenna inside the float 2 in this configuration, the upper end of the radiator 3 is attached to the inner surface of the top of the float 2 as shown in FIG. Housing 6
After fixing this float part housing 6 to the upper part of the buoy body 1 by attaching it with screws 9 to the mounting hole 8 provided in the float 2, by blowing air etc. into the float 2 and expanding it, the above dimensions A, An antenna satisfying B and C has been obtained.

By the way, these dimensions, that is, the height A of the radiator 3, the height B of the ground wire 4, and the width C between the ground wires 4 are as follows.
This is determined by the performance of the antenna and the frequency band used, but in the case of the structure described above, the buoy body 1
The shape and dimensions of will depend on the width C between the ground lines 4. In other words, since the terminals 7 of each wire 4 are screwed to the float housing 6 that is connected to the buoy body 1, for example, if it is necessary to increase the width C between the ground wires 4, the shape of the buoy body 1 The dimensions also have to be increased, so the buoy body 1 becomes larger,
It also has drawbacks such as being expensive. Furthermore, since the terminals 7 of each line 4 are fixed to the mounting holes 8 of the float part housing 6 with screws 9, there is a drawback that many man-hours are required for processing and assembling, resulting in high costs.

[Purpose of invention]

This invention was made to solve the above-mentioned drawbacks of the conventional technology, and it is possible to change the width between the ground lines without changing the shape and dimensions of the buoy body, and it is easy to assemble and low cost. The purpose is to obtain a structure for a buoy float that can measure the

[Structure of the idea]

In order to achieve the above-mentioned object, the present invention includes a float that is attached to the upper end of a buoy body and whose lower part expands to be larger than the diameter of the buoy body, and an antenna radiator that is attached to the inner surface of the top of the float. , in the structure of a buoy float having a built-in antenna consisting of a plurality of ground wires provided at the base of the radiator, a holder with a concave cross-sectional shape attached to the lower end of each wire, and a lower part of the float. A plurality of ground wires are attached so as to penetrate from the outside to the inside while maintaining watertightness, and by fitting with the holder, the lower end of the ground wire is fixed, and the cross-sectional shape is convex and conductive to ground the ground wire to seawater. It is equipped with metal fittings that have properties.

〔Example〕

The following description will be made with reference to the drawings. FIG. 4 is a perspective view of a buoy equipped with a float according to the present invention, and FIG. 5 is an enlarged sectional view thereof, showing one embodiment of the present invention. In the figure, 1 is the buoy body, 2 is a float formed of a rubberized sheet, 3 is an antenna radiator, 4 is a ground wire, 5 is a power supply line, and 6 is a float part housing. -corresponds to that in Figure 3. Further, A' is the height of the radiator 3, B' is the height of the ground wire 4, and C' is the width between the ground wires 4.

Numeral 10 is a conductive metal fitting with a convex cross section that is fixed to the float 2, and 11 is a holder with a concave cross section. This is to fix the wire 4 and ground it.

To explain this structure in more detail, as shown in FIG. 6, the upper part of the radiator 3 is attached to the top inner surface of the float 2, and the upper end of each ground wire 4 is fixed to the base of the radiator 3. On the other hand, as shown in FIG. 7, through holes 12 are drilled at multiple locations in the lower part of the float 2.
Using each through hole 12, the metal fitting 10 is passed through the float 2 from the outside to the inside as shown by the arrow.
Here, the metal fitting 10 is, for example, a disk portion 1 as shown in the figure.
It has a shape in which a protrusion 10b with a spherical tip is formed in the center of the float 2.
After penetrating the inside of the float 2, the disc portion 10a is closely fixed to the float 2 with adhesive or the like so that the penetrating portion can be kept watertight. Then, a holder 11 shaped to fit the protrusion 10b of the metal fitting 10 is attached to the lower end of each line 4, and the holder 11 is fitted onto the protrusion 10b of the metal fitting 10 as shown in FIG. Fix the lower end of line 4. After doing this, the float housing 6 is fixed to the buoy main body 1, and air or the like is introduced into the float 2 to inflate it, resulting in the state shown in FIG. 5.

In this state, the width C' between the ground wires 4 becomes larger than the outer diameter of the buoy body 1, and the metal fitting 10 fitted with the holder 11 attached to the ground wire 4 is immersed in seawater. The ground wire 4 is grounded.

Note that the metal fittings 10 and the holder 11 are not limited to the shapes shown in the drawings, but may have other shapes as long as they can keep the float 2 watertight and fix the ground wire 4.

[Effect of idea]

As explained above, the present invention allows a metal fitting with a convex cross-sectional shape to pass through the float from the outside of the lower part to the inside, and is fixed to the float so as to maintain watertightness of this penetrating part, and a concave holder that matches the metal fitting. is attached to the lower end of the ground wire, and the ground wire is fixed by fitting this holder and the metal fitting, and the ground wire is also grounded to seawater. Changes in width can be dealt with simply by changing the mounting position of the metal fittings.
It becomes possible to support various types of antenna performance without changing the shape and dimensions of the buoy body. Therefore, it is possible to standardize the shape and dimensions of the buoy body and make it more compact, and it is also possible to reduce the price.Furthermore, there is no need for various works such as screwing to fix the ground wire as in the past. , processing and assembly man-hours are reduced, assembly becomes easier, and costs can be reduced.

Additionally, if the metal fittings are fixed to the float in advance, it is possible to check the watertightness of the metal fittings on the float itself before installing the antenna inside the float, which has the advantage of increasing the reliability of the product. It can be used for all underwater observation equipment that has a float with a built-in antenna.

[Brief explanation of drawings]

Fig. 1 is a side view of a buoy with a conventional float attached, Fig. 2 is an enlarged sectional view thereof, Fig. 3 is a perspective view showing the assembly procedure, and Fig. 4 is a side view of a buoy with a float according to the present invention attached. , Fig. 5 is an enlarged sectional view of the float, Fig. 6 is a perspective view of the float before it is attached to the buoy, Fig. 7 is a sectional view of the metal fitting and holder used in the present invention before they are fitted together, and Fig. 8 is their fitting. FIG. DESCRIPTION OF SYMBOLS 1... Buoy body, 2... Float, 3... Radiator, 4... Ground wire, 5... Power supply line, 6... Float part housing, 10... Metal fitting, 11... Holder, 12...
...through hole.

Claims (1)

[Claims for Utility Model Registration] A float attached to the upper end of a buoy body that expands so that its lower part expands to be larger than the diameter of the buoy body; An antenna radiator attached to the inner surface of the top of the float; The structure of a buoy float with a built-in aerial wire consisting of multiple ground wires provided at the base of the vessel includes a holder with a concave cross-section attached to the lower end of each wire, and a watertight seal at the bottom of the float. The lower end of the ground wire is fixed by fitting with the holder, and the ground wire is grounded to the seawater.It has a convex cross-sectional shape and is electrically conductive. A structure of a buoy float with a built-in aerial, characterized by having metal fittings.