JPS6040004Y2 - Antenna mast branch line attachment - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to improvements in antenna mast branch line attachments.

Generally, when attaching an antenna support such as a roof horse to the roof of a building, a branch line attachment tool that is inserted through the antenna mast attached to the roof horse and fixed with an appropriate clasp is strung with a branch line at an appropriate location on the roof. I was doing it because of this.

A conventional branch wire attachment device, for example, as shown in FIGS. 1 and 2, has an antenna mast insertion hole 2 formed in the center of a circular plate 1, and a hole 3 for winding an appropriate number of branch wires in a local part of the antenna mast insertion hole 2. Since it was a punched product made by press working, winding of the branch wire caused burrs to form on the edges of the hole 3, or the edges were angular.

For this reason, when winding a branch wire, the branch wire is damaged at the edge of the hole 3 where the branch wire is passed through the hole 3 and wound and stretched, and in the case of a coated branch wire, the coating is torn and the branch wire becomes scratched, so it is relatively short-term. In the meantime, the branch line is likely to break due to fatigue at the damaged location, causing the wire to break and the antenna position to be greatly misaligned.

In view of the above-mentioned circumstances, in the present invention, the branch wire winding hole has a convex curved surface and one side of the hole is formed by the inner circumferential surface of an annular protrusion that bulges out from one side of the disk, and the outer circumferential end surface of the disk is By forming at least one side edge into a curved surface, the above-mentioned drawbacks are solved, and the hole width can be selected regardless of the thickness of the disk.

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 3 is a perspective view showing one embodiment of the present invention, and Fig. 4 is the same B.
-B sectional view, and FIG. 6 is a bottom view of the same.

Moreover, what is shown in FIG. 5 is a sectional view showing another embodiment.

In the figure, there is an antenna mast insertion hole 2 in the center of the disk 1.
Further, an appropriate number of holes 3 are provided around the periphery for winding the branch wires.

As shown in FIGS. 4, 5 and 6, the branch wire winding hole 3 is formed on the disk 1 by machining and burring.
The part protruding from one side 5 is bent again toward the outer periphery using a press, so that the annular protrusion 4 bulges out on one side 5, and the branch line attachment hole is formed in a curved surface 6 with a convex center.

Therefore, one side of the branch wire winding hole 3 is formed by the annular protrusion 4, and as a result, the width of the branch wire winding hole 3 is more than twice the thickness of the disc 1, and the hole is formed with a convex curved surface. There are no corners.

On the other hand, the outer peripheral end surface 7 of the disk 1 is formed by forming a curved surface 9 on the outer peripheral end when the end is curled inward by curling processing in the one shown in FIG. 4, and in the one shown in FIG. The slope portion 8 is formed by bending, and the outer peripheral edge thereof is formed into a curved surface 10.

Since the present invention has the above-mentioned configuration, the branch line attachment hole 3
The hole width can be at least twice the thickness of the disk 1, which is particularly advantageous for disks made of steel or other metals where the disk thickness is thin, and a sufficient hole width can be provided.

Moreover, since the branch line attachment hole 3 is formed into a convex curved surface and has no burrs or corners, the branch line that is inserted through it and wound and stretched will not be damaged, and the outer peripheral edge of the disc 1 is also curved. Therefore, the tension branch line will not be damaged at the outer peripheral edge.

Therefore, the service life of the branch line can be increased, and the antenna support such as the roof horse can be accurately fixed for a long period of time.

Incidentally, branch wire winding is a highly effective idea when implemented because the increase in product cost due to the curved surface machining of the hole and the outer peripheral end surface of the disk can be sufficiently reduced by mass production using an appropriate dedicated machine.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional product, Fig. 2 is a sectional view taken along line A-A in Fig. 1, Fig. 3 is a perspective view showing an embodiment of the present invention, and Fig. 4 is a B--B in Fig. 3. 5 is a longitudinal sectional view showing another embodiment of the present invention, and FIG. 6 is a bottom view of the embodiment shown in FIG. 3. 1... Disc plate, 2... Antenna mast insertion hole, 3... Hole for winding branch wire, 4... Annular projection, 5... ...One side.

Claims (1)

[Scope of utility model registration request] In a branch line attachment device that has an antenna mast insertion hole in the center of a circular plate and a plurality of branch wire winding holes in its local part, the branch line winding hole has a convex curved surface and one side of the hole is a circular plate. 1. An antenna mast branch line attachment, characterized in that it is formed of an inner circumferential surface portion of an annular protrusion that bulges out from one side of the disk, and at least one side edge of the outer circumferential end surface of the disk is formed into a curved surface.