JPS6334329Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mounting device for mounting an antenna element on an antenna arm, and aims to improve the holding strength of the antenna element and the workability of the device.

As shown in FIGS. 1 to 3, a conventional antenna device has a structure between a lower antenna element mounting bracket 2 located on an antenna arm 1 and a lower mounting bracket 2 located above this lower mounting bracket 2. is provided with an upper mounting bracket 4 that holds the pair of antenna elements 3, 3, and these lower mounting brackets 2 and upper mounting bracket 4 are connected by a single bolt 5.
By tightening and fixing the wing nut 6 to the antenna arm 1, the antenna elements 3, 3 are fixed between the bottom mounting bracket and the top 2, 4. Here, the lower and upper mounting brackets 2 and 4 each form an arc-shaped recess corresponding to the cylindrical antenna elements 3 and 3, and the upper mounting bracket 4 as a whole is formed to have a U-shaped cross section. When the antenna elements 3, 3 are fixed, both ends thereof partially overlap the outside of the lower mounting bracket 2, so that the fixed state of the antenna elements 3, 3 is ensured.

However, in this case, the overall lengths of the upper mounting bracket 4 and the lower mounting bracket 2 are the same, and both mounting brackets 2,
Since the shapes of both ends of 4 are perpendicular to the planes in contact with the antenna elements 3, 3 due to press punching,
Due to vibrations caused by wind and rain, etc., a large concentrated load is generated on the antenna element portions that are in contact with the lower and upper ends of the mounting brackets 2 and 4, which tends to cause the problem of element breakage. Further, since the tips of the lower and upper mounting brackets 2 and 4 are sharp, it is difficult to insert the element between the upper and lower mounting brackets 4 and 2.

The present invention eliminates the above-mentioned conventional drawbacks. An example of this will be described below with reference to FIGS. 4 to 6. In the drawings, the same parts as in FIGS. 1 to 3 are given the same numbers and will be explained.

In the figure, 10 has a recessed part with an arm along the outer periphery of the antenna elements 3, 3 under the mounting bracket located on the antenna arm 1, and has a recessed part at both ends that allows easy insertion of the antenna elements 3, 3. A large-diameter portion 11 is formed therein. 12 is on the mounting bracket, and its diameter is narrower than the width of the lower mounting bracket 10 so that the entire part rests on the surface of the lower mounting bracket 10;
Further, large diameter portions 13 are formed at both ends for the same purpose as the large diameter portion 11 of the lower mounting bracket 10. The upper mounting bracket 12 has a shorter overall length than the lower mounting bracket 10, so that the concentrated load on a portion of the antenna elements 3, 3 is reduced. Of course, the upper mounting bracket 12 is shaped to have an arm along the outer periphery of the antenna elements 3, 3. Further, the lower mounting bracket 10 is provided with one or more holes 14, and the upper mounting bracket 12 is provided with a protrusion 15 that fits into the hole 14. This protrusion 15 and hole 14
This fitting prevents the upper mounting bracket 12 from freely rotating with respect to the lower mounting bracket 10.

In the above configuration, the lower mounting bracket 10 and the upper mounting bracket 12 are attached to the antenna arm 1 with the tightening bolts 5 and wing nuts 6 at the time of shipment.
When installing, loosen wing nut 6 and attach both mounting brackets 1.
A gap is provided between antenna elements 3 and 3.
When the antenna element 3 is inserted from both ends and the wing nut 6 is tightened again, the antenna elements 3, 3 are attached to the antenna arm 1. At this time, both mounting brackets 10,
Since the large diameter portions 11 and 13 are provided at both ends of the antenna elements 12, the insertion of the antenna elements 3 and 3 can be performed smoothly, and even when the wing nut 6 is loosened, the protrusion 15 is constantly fitted into the hole 14. Only the upper mounting bracket 12 does not rotate freely.

As described above, according to the antenna device of the present invention,
Both mounting brackets have large-diameter parts at their tips, and the protrusions and holes on both mounting brackets are fitted together to prevent the top and bottom of the mounting brackets from rotating independently. The antenna element can be inserted smoothly between the two mounting brackets, and by providing a large diameter section at the tip of both mounting brackets and making a difference in the length of both mounting brackets, vibrations caused by wind and rain etc. can be concentrated on the antenna element. The load is reduced and the holding strength of the antenna element is greatly improved.

[Brief explanation of the drawing]

1, 2, and 3 are perspective views, front views, and side views of an antenna device in a conventional example, and FIGS. 4, 5, and 6 are perspective views of an antenna device in an embodiment of the present invention. They are a figure, a front view, and a side view. 1... Antenna arm, 3... Antenna element,
5... Bolt, 6... Wing nut, 10... Lower mounting bracket, 11, 13... Large diameter part, 12... Upper mounting bracket, 14... Hole, 15... Projection.

Claims (1)

[Scope of utility model registration request] A first mounting bracket located on the antenna arm and a second mounting bracket located on the first mounting bracket to sandwich the antenna element between the first mounting bracket and the second mounting bracket are provided. 1. The second mounting bracket and the antenna element are fixed to the antenna arm with bolts and nuts, and the lengths of the first and second mounting brackets are different, and the first, An antenna device in which large-diameter portions are formed at both ends of the second mounting bracket, a protrusion is provided on one of the first and second mounting brackets, and a hole into which the protrusion is fitted is provided on the other.