JPS643210Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a connection device between an antenna mast and a pedestal.

The conventional antenna mast and mount connection device is the first
As shown in the figure, a vertically erected cylindrical mast 1 has a pedestal 6 mounted on the tip thereof, a parabolic reflector 2, a primary radiator 3, a converter 4, and an elevation angle adjustment device 5 attached to the bottom of the cylindrical mast 1. After fitting the body 7 to the outside and setting the azimuth of the parabolic reflector 2, tighten the mounting bolt 8 screwed onto the side wall of the cylindrical body 7, and press the outer peripheral surface of the mast 1 with the tip of the mounting bolt 8 to fix it. are doing. Since this fixation is by point contact of the mounting bolt 8, after long-term use, repeated vibrations caused by the wind will cause a gap to form between the tip of the mounting bolt 8 and the pressing part of the outer circumferential surface of the mast 1. As a result, the pedestal 6 deviates from its initial fixed position with the mast 1, changing the installation azimuth of the antenna, resulting in a disadvantage that radio waves cannot be transmitted and received correctly. Therefore, in view of the above circumstances, the present invention is designed to be easy to install, and
This was developed with the aim of providing a connection device between the mast and the pedestal that does not shift over a long period of time.The inner cylinder is fixed to the bottom of the pedestal, and the tapered piece on the lower end of the inner cylinder has protrusions on the outer and inner surfaces. A ring body divided into a plurality of pieces in the circumferential direction is internally fitted to the mast tip, and a pedestal is placed on the mast tip surface, and a threaded rod with the cone at the lower end fitted internally to the tapered piece is mounted on the pedestal. It is screwed on.

Hereinafter, the present invention will be explained in detail based on specific embodiments shown in FIGS. 2 to 4.

A mounting arm 10 made of a bent tube is fixed to the back surface of the parabolic reflector 9, and a converter 12 is attached to the extended end of the arm 10 so that the primary radiator 11 is positioned at the focal point of the parabolic reflector 9. One side of the top surface of the flat plate-shaped pedestal 13 and the lower part of the mounting arm 10 on the back side of the parabolic reflector 9 are pivotally connected, and the other side of the top surface of the pedestal 13 and the upper part of the mounting arm 10 are connected via an elevation adjustment device 14 of a turnbuckle. It pivots.

A cylindrical mast 15 is erected vertically. An inner cylinder 16 that can be fitted into the mast 15 is fixed to the lower surface of the flat plate-shaped pedestal 13 in a hanging manner. A vertically divided groove 17 that opens at the lower end is carved on the lower end side of the inner cylinder 16, and a tapered piece 18 is formed on the lower end side with a larger diameter at the top and a smaller diameter toward the bottom. A ring body 20 having protrusions 19 on the inner and outer surfaces and divided into a plurality of pieces in the circumferential direction is fitted onto the outside, and the lower end thereof is bent outward to hold the ring body 20 and engages a locking piece 21. Form. The insertion hole 22 drilled in the center of the pedestal 13 is closed with a cover plate 23 and screws 24 are inserted.
A threaded rod 25 is screwed into the center of the cover plate 23 in a hanging manner, and a cone 26 in the shape of an inverted cone that comes into contact with the inner surface of the tapered piece 18 is attached to the lower end of the threaded rod 25.
is inserted into the shaft portion 31, and washers 27,
A retaining pin 29 is inserted through the lower end with a retaining pin 28 interposed therebetween, and is rotatably provided. The upper end of the threaded rod 25 is formed into a square or hexagonal shape for screwing the threaded rod 25, and the upper end of the threaded rod 25 is screwed onto the upper surface of the cover plate 23 with a lock nut 30.

The ring body 20 and inner cylinder 16 are attached to the tip of the mast 15.
The frame 13 is placed on the top end surface of the mast 15. After setting the azimuth angle of the parabolic reflector 9, when the upper end of the threaded rod 25 is engaged with a spanner or the like to be used as a screwdriver, the conical body 2 is joined to the tapered piece 18 at the lower end.
6 descends, expands the ring body 20, and opens the mast 15.
As the protrusion 19 on the outer circumferential surface bites into the inner surface,
The protrusion 19 on the inner circumferential surface sinks into the outer circumferential surface of the tapered piece 18, and the ring body 20 is pressed onto the mast 15, thereby connecting and fixing the mast 15 and the pedestal 13.

Although the above embodiment describes an offset type parabolic antenna, other types of antennas,
Alternatively, it can also be used when attaching a projector, speaker, etc. other than the antenna to the tip of the mast facing in any direction.

As mentioned above, in this invention, an inner cylinder that can be fitted into the mast tip is fixed to the lower surface of the mount in a hanging manner, a vertical groove with an open lower end is carved on the lower end of the inner cylinder, and the lower end is opened upward. is formed into a tapered piece that has a large diameter and becomes smaller in diameter as it goes downward, and a ring body that is divided into a plurality of pieces in the circumferential direction and has protrusions on the inner and outer surfaces that can be fitted inside the tip of the mast is attached to the tapered piece. An antenna mast in which an inverted conical cone is provided at the lower end of a threaded rod that is fitted and screwed into the mast in a hanging manner, the cone is fitted inside the tapered piece, and the mount is placed on the mast tip surface. This is a connecting device between the mast and the mount, and instead of pressing by point contact using conventional mounting bolts, the outer and inner circumferential surfaces of the ring body, which has protrusions on the inner and outer surfaces, are fully wedged into the inner surface of the mast and the outer surface of the tapered piece. Even after long-term use, the pedestal will not shift relative to the mast. Furthermore, with the present invention, the ring body can be inserted into the mast tip, the pedestal can be placed on the mast tip surface, and the pedestal can be connected to the mast with an extremely simple operation of simply turning a threaded rod. Furthermore, in this invention, an inner cylinder is inserted into the mast tip, a pedestal is placed on the mast tip surface, the pedestal is temporarily supported by the mast, and then the pedestal is rotatable on a horizontal plane around the inner cylinder. Therefore, it is easy to set the azimuth angle of the antenna. Furthermore, in the present invention, since the main connecting portion between the mast and the pedestal is housed within the mast, the connection between the mast and the pedestal can be made more compact.

[Brief explanation of the drawing]

Figure 1 is a side view of a conventional antenna mast and mount connection device, Figures 2 to 4 are specific embodiments of the present invention, Figure 2 is a side view showing the overall outline, and Figure 3 is FIG. 4 is an enlarged vertical cross-sectional view of the main part, and FIG. 4 is a cross-sectional view taken from - in FIG. 13... Frame, 15... Mast, 16... Inner cylinder, 17
...Vertical groove, 18...Tapered piece, 19...Protrusion, 20...
Ring body, 25...threaded rod, 26...cone body.

Claims (1)

[Scope of utility model registration request] An inner cylinder that can be fitted inside the mast tip is fixed to the lower surface of the mount in a hanging manner, and a vertically divided groove that is open at the lower end is carved on the lower end side of the inner cylinder, and the lower end side has a large diameter at the top and a groove that extends downward. Formed into a tapered piece with a small diameter,
A ring body divided into a plurality of pieces in the circumferential direction and having protrusions on the inner and outer surfaces that can be fitted inside the tip of the mast is fitted onto the tapered piece, and the ring body is inserted into the lower end of the threaded rod which is screwed in a hanging manner on the pedestal. 1. A connecting device for an antenna mast and a pedestal, characterized in that a conical body is provided, the conical body is fitted into the tapered piece, and a pedestal is placed on the tip end surface of the mast.