JPS6334328Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to the invention of a mechanism for fastening an element-arranged arm in an antenna, and allows the arm on which the element is arranged to be accurately attached to the mast with a relatively simple structure, such as in a television antenna. It is designed so that it can be tightened and its attachment state can be changed easily and appropriately. In the case of a television antenna, etc., it is necessary to fasten the arm on which the antenna element is arranged to the vertical mast.
Such masts and arms generally use pipe materials with a circular cross section. Therefore, in order to securely and accurately fasten the circular cross section materials to each other in an intersecting manner, it is necessary to ensure that both members are connected to each other in a single piece. It is quite difficult because it is necessary to fix it in a point contact state. In addition, it is necessary to install the mast and arm in a state suitable for receiving horizontally polarized waves or a state suitable for receiving vertically polarized waves in each case, and furthermore, It is also necessary to convert the arm to the right or left side of the mast depending on the specific antenna setting conditions, and to make these conversions possible, it is also stable as described above in either of these installation conditions. It is not easy to form such a fastening relationship, and it is particularly difficult to perform the above-mentioned conversion because it requires work at high places such as on a mast installed on a rooftop. There is also a great possibility that the powder may fall and be lost.

As mentioned above, the present invention was devised after repeated studies in view of the actual situation, and to explain its embodiment as shown in the attached drawings, it is a circular pipe as shown in Fig. 1 or 2. When assembling and fastening the arm 8 on which the antenna element is disposed to the mast 7 in a perpendicular state, a mounting base member 1 is bent to have a U-shaped cross section as shown in FIG.
Using a holding member 2 as shown in FIGS. 1 and 2 or FIG. The base member 1 has a connecting portion 11 to the mast 7, and is tightened using a tightening bolt 4 screwed with a tightening member 5a such as a butterfly screw. . There is a cross-shaped insertion hole 1 in the bent corner 1a (lower side).
2 to which the above-mentioned tightening bolt 4 is attached. That is, the extension parts 12a, 12a located on the corner part 1a of this cross-shaped insertion hole 12
is a portion where the tightener 5a is attached to and removed from the tightening bolt 4, and an extension portion 12 thereof
an extension part 12b in a direction crossing a, 12a;
Reference numeral 12c is a portion where the tightening bolt 4 is positioned and tightened with the tightening element 5a as shown in FIG. 1 or 2. Further, the insertion holes 13, 1 of such a base member 1
The U-bolt 3 is inserted into the U-bolt 3, and the presser member 2 with the mast joint portion 20 in the middle is inserted into both ends of the U-bolt 3 to attach the tighteners 5, 5. Insertion holes 2a, 2b for bolt 3
are all long holes, and these insertion holes 2
one in a, 2b (in the illustrated one, through hole 2
b) has a cutout opening 2 on one side as shown in Figure 4.
c is formed, and with the tightener 5 slightly loosened, the holding member 2 can be slid in the direction of the elongated holes 2a and 2b, and one end side of the U-bolt 3 can be inserted through the insertion hole 2b. There is.

To explain the operation of using the device according to the present invention as described above, U bolts 3 are inserted into the insertion holes 2a and 2b.
Insert both ends of the mast 7 with the tighteners 5, 5.
is inserted between the mast joints 11 and 20, and the first
It is clear that the mast 7 and the arm 8 can be fastened in a crossed manner as shown in FIG. 2 or FIG. By tightening the tightening element 5a in the direction shown in FIG. It will be converted by 90 degrees, so arm 8
Since the mounting direction of the arm 8 can be changed by 90 degrees, the direction of the antenna element, which is inserted and arranged perpendicularly to the axial direction of the arm 8, can be changed by 90 degrees, thereby changing the horizontal polarization reception state or the vertical polarization reception state. Although the wave reception condition can be formed as appropriate, such a change setting is possible because the head of the tightening bolt 4 is set on the arm 8, and as is clear from the state shown in FIG. This can be done freely while the members are tightened, and further, if the operating protrusions of the tightener 5a, such as butterfly screws, are aligned with the extensions 12a, 12a of the insertion hole 12, as shown in FIG. As shown in phantom lines in FIG. 5, the arm 8 (or the mounting base member 1) can be removed from the mounting base member 1 (or the arm 8). Pressing member 2 for mast 7
To tighten, as described above, loosen the clamps 5, 5 slightly, and then slide the presser member 2 using the elongated direction of the elongated insertion holes 2a, 2b, and remove the U from the notch 2c.
The arm 8 removed as described above can be easily removed by removing one end of the bolt 3 and tilting the holding member 2 with respect to the base member 1 as shown by the imaginary line in FIG. Base member 1 as appropriate
Alternatively, it is possible to change the mounting direction of the antenna element installation part from the mast 7, and when performing these operations, the bolts 3, 4 and their tighteners 5, 5a, etc. are not attached to the base member 1 or the arm 8. It remains attached. In other words, since the tightening elements and bolts remain connected like this nut, there is no need to grasp at least multiple parts to change and set them, and there is a high possibility that they will fall off. Even if you lose one, you won't lose it. If the tightener 5a is tightened when the arm 8 is tightened in each of the horizontally polarized wave or vertically polarized wave reception states described above, the arm 8 will be strongly pressed against the base member 1 in a line contact state. Even when tightening with a single bolt 4 and tightening member 5a, intensive pressure contact and tightening can be obtained between the arm 8 and the base member 1, and accurate tightening can be obtained in any state. Since the base end of the bolt 4 is attached to the arm 8, a simple U-shaped base member 1 is sufficient, but a reinforcing structure may be adopted to prevent deformation during tightening. Of course.

According to the present invention as described above, the attachment relationship of the arm 8 to the mast 7 and the reception state of the arm 8 can be changed as appropriate, and in addition, when making these changes, it is possible to change the settings by tightening bolts and nuts. Since the parts do not separate, there is no chance of the parts falling or being lost, and the degree of loosening of the fasteners 5, 5a for changing settings is only minimal, so handling is easy and quick. Moreover, since the number of required parts is relatively small and the structure of the base member 1 and other parts is simple, manufacturing and assembly is easy, and from this point of view, the above-mentioned setting operations are facilitated, and any setting state can be accurately set. This invention has many features that can be achieved, and is highly effective in terms of practical production.

[Brief explanation of the drawing]

The drawings show embodiments of the invention,
FIG. 1 is a partial perspective view showing one setting state of the device according to the present invention, FIG. 2 is a partial perspective view of another setting state, FIG. 3 is a perspective view of the mounting base member, and FIG. A perspective view showing the separation operation relationship between the mounting base member and the arm, FIG. 5 is a partially cutaway plan view thereof, and FIG. 6 is a partially cutaway plan view showing the change setting operation relationship of the arm with respect to the base member and the mast. 7 are plan views showing the release operation relationship of the presser member. In these drawings, 1 is a mounting base member, 1a is a corner 2 is a holding member, 3 is a U-bolt, 4 is a tightening bolt, 5 and 5a are tightening elements such as butterfly screws, 7 is a mast, and 8 is a Arms, 11 and 20 are mast joints, 12 are cross-shaped insertion holes, 12a and 1
Reference numerals 2b and 12c indicate their extensions, respectively.

Claims (1)

[Scope of utility model claims] In a structure in which a mounting base member and a holding member for mounting an arm on which an antenna element is disposed on a mast in a cross-shaped manner are tightened using a bolt and a tightening element such as a butterfly screw, the mounting base member has a cross section. The arm is held within the mounting base member, and both ends of the U-bolt inserted into the mounting base member are inserted into elongated insertion holes formed in the holding member. A cutout opening is formed in one of the elongated insertion holes for disengaging the U-bolt, and the bent corner of the mounting base member A cross-shaped insertion hole is formed, and the tip of the tightening bolt whose base end is locked to the arm is inserted into the cross-shaped insertion hole, and the butterfly screw screwed into the tip is inserted into the cross-shaped insertion hole. It is possible to change the setting direction of the arm by attaching and detaching the tightener while it is attached, and also to tighten the direction in which the antenna element is disposed in the arm fixed to the mast in any reception state. An element arrangement arm fastening mechanism in an antenna characterized by the following.