JPH0113445Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an antenna that can be reassembled from a stored and folded state to an unfolded and used state without removing a relatively long antenna element from an arm or an attachment member. It is possible to form an accurate deployed state of use, such as when working at heights, without fear of damage, and to obtain a strong antenna in the deployed state of use.

In FM, television reception, or communication antennas installed on rooftops, etc., it has been common practice to install antenna elements on the arm in a cross-shaped manner. It has also been commonly practiced to use a fastening member such as the above. When relatively long antenna elements are installed, the antenna elements may be divided into two parts, as shown in Japanese Patent Publication No. 32-7006, for example, in order to make the packaging more compact. A phosphor bronze connecting plate and a spacer tube, both ends of which are inserted into and engaged with each of the divided elements, are interposed between the proximal ends of these divided elements to improve electrical continuity, and this is made into U. These objects are received by a receiving member which is also built into the U-shaped fastening member, and a spring is interposed between the arm and the above-mentioned fastening member, receiving member, etc. The bolts are tightened and the serrated teeth at both ends of the connecting plate are used to prevent each split element from coming off in the axial direction.
In other words, if this is done, even a relatively long antenna element can be packed and organized as short and small divided elements, but each divided element can be removed from the fastening fitting, receiving member, and connecting plate and packed. In this packaged state, the divided elements are in pieces, so it is not easy to transport them to a rooftop, etc. Also, since there are a large number of parts, it is difficult to insert and attach the individual parts one after another. is extremely difficult. In addition, in some cases, a splitting element as described above is attached between the fastening members, but in this case, even if the splitting element is handled as an integral part, the pivoting of this The operation of locating the part between the fastening members and tightening it with the tightening member becomes considerably complicated, and the difficulty of working at height is the same as described above.

The present invention was devised through research to eliminate the disadvantages of the conventional ones as described above.
The embodiment shown in the accompanying drawings will be described. As shown in FIG. In the antenna element, the antenna element is formed by two divided antenna element parts 1, 1, and an overlapping part having a semicircular cross section is provided on the base end side of these antenna element parts 1, 1. 11, 11 are formed as shown in FIG. The tightening member 2 is assembled between the attachment members 7 and 8, and inserted into the insertion hole 12 through the arm 10 and the attachment members 7 and 8, and the tightening element is tightened with the overlapping portion 11 in the overlapped state as described above. A nut 4 is screwed onto the threaded portion 21 of the child 2, and by tightening the nut 4, the child 2 is fixed to the arm 10 as shown in FIG.

That is, by loosening the nut 4, the divided antenna element parts 1, 1 can be folded into a state completely parallel to the arm 10, as shown in FIG. This makes it convenient for packaging or organizing and storing products. Also, cover each antenna element part body 1, 1 as shown by the arrow shown in FIG. 2, and tighten the nut 4 slightly while the flat surfaces of the semicircular overlapping parts 11, 11 are joined. By simply assembling each antenna element body 1, 1 on a coaxial line, it is possible to form the unfolded and used state as shown in FIG. There is no possibility of dissipation or loss of each component.
Even when working in high places such as on the roof, there is no need to drop any parts, making it easy to operate.

The overlapping portion 11 as described above is formed in a planar shape as shown in FIG. 4 in the case of the element body 1 made of pipe material as shown in this attached drawing, or as shown in FIG. 5. By forming the concave portion 11a in the middle thereof, it is possible to form an appropriate overlapping portion 11 without any difficulty.

According to the present invention as described above, it is possible to arrange and pack the divided antenna element body 1 in a compact state in which it is perfectly parallel to the axial direction of the arm 10, and also to organize the constituent members. Since it can be handled without being disassembled, it is extremely easy to configure its deployment and use condition, which means there is no loss of parts, and it has the advantage of being able to reduce the amount of tightening and operate efficiently, especially when handling at high places. Moreover, when the antenna element itself is deployed and used, the semicircular overlapping portion 11 of the antenna element body itself is directly overlapping with the anchoring members 7 and 8 in a face-to-edge manner. Since both element bodies are sandwiched in four layers and positioned on the same axis, it is extremely strong and mechanically stable, and the electrical contact relationship is also stable. It has the effect of requiring only a small number of points, and is a highly effective device in practical terms.

[Brief explanation of the drawing]

The drawings show embodiments of the invention,
Fig. 1 is a perspective view showing a part of the antenna according to the present invention in the unfolded state, Fig. 2 is a perspective view of the antenna element in the folded state, and Fig. 3 is the weight of the element shown in Fig. 1. FIG. 4 is a cross-sectional view showing the assembly structure at the joining part, FIG. 4 is a perspective view of the joining part of the antenna element part, and FIG. 5 is a perspective view similar to FIG. 4 showing a modification thereof. In these drawings, 1 is an antenna element body, 2 is a tightening element, 4 is a nut, 7 and 8 are fastening members, 10 is an arm, 11 is a semicircular overlapping part, and 12
indicates an insertion hole.

Claims (1)

[Scope of utility model registration request] In an arm in which two antenna element bodies each having a circular cross section are sandwiched and fixed in an intersecting manner by upper and lower engaging members, a semicircular cross section is attached to the base end of the antenna element body. The semicircular overlapping portions are placed face-to-face and facing each other, and the tightening elements and nuts inserted through the arms and the respective fastening members are inserted into the respective insertion holes formed in the overlapping portions. An antenna characterized in that it is attached and fixed.