JP4129686B2 - Multi-element directional antenna elevation setting attachment device - Google Patents

Description

  The present invention is a multi-element directivity suitable for installation by setting four UHF or VHF band multi-element directional antennas to a high-frequency radio wave emission source such as a terrestrial digital TV broadcasting antenna and setting the elevation angle accurately. The present invention relates to an antenna elevation setting apparatus.

As devices for setting the elevation angle of a communication antenna and attaching it to a support column or a veranda, those described in the following Patent Document 1, Patent Document 2, and Patent Document 3 are well known. This is an antenna mounting device for setting a parabolic antenna for receiving incoming radio waves from broadcasting satellites and communication satellites and setting the parabolic antenna on a support column or a veranda.
JP-A-7-226621 JP 2001-298310 A JP 2003-46310 A

  The above-mentioned conventional example is an apparatus for setting the elevation angle of a parabolic antenna, and the receiving surface of the parabolic antenna is attached to the broadcasting satellite or the communication satellite by screwing the contact surface portions of the plate surfaces of the plurality of antenna mounting tools so that the angle can be changed. The angle of elevation is set so that they face each other. Specifically, the plate surfaces of each antenna mounting device are in contact with each other, and the edge of the long hole formed in one plate surface is screwed to the other plate surface. Because the elevation angle of the parabolic antenna is fixed, the strength of the elevation angle fixing part is weak against the external force in the contact surface direction, and the antenna elevation angle setting part is locally concentrated on the plate surface of the mounting device. Antennas that are weak to support long objects based on the principle of the above, and set the elevation angle of four multi-element directional antennas in the UHF band and VHF band that are used in a horizontal and vertical stack connection, and are attached to the column Can not be adopted because of insufficient strength is as attached devices.

  In other words, in the area that is the shadow of terrestrial television broadcasting radio waves, the UHF band and VHF band relay radio waves are emitted by converting the frequency from the relay antenna of the Yamagami satellite station or changing the plane of polarization of the emitted radio waves. As a result, the UHF band and VHF band receiving antennas connected in horizontal and vertical stacks are as good as possible. Then, the amount of snow on each of the multi-element directional antennas increases, and the load of the four multi-element directional antennas in the UHF or VHF band may be as heavy as 20 kilograms or more. The four multi-element directional antennas are more likely to swing than one parabolic antenna during strong winds throughout the season.

  Therefore, when the four multi-element directional antennas are forcibly mounted on the conventional example, the excessive external forces from the four antennas that swing due to the large antenna load or strong wind are respectively Due to the lever principle, the plate surface and locally concentrated antenna elevation angle fixing parts are repeatedly and strongly applied, so the plate surface repeatedly bends, and the antenna elevation angle fixed contact surface screwing parts shift each other and receive. The condition becomes extremely unstable, and the elevation angle and horizontal direction of each directional antenna in the above band change greatly, resulting in reception failure, and sometimes the elevation angle fixing part of each antenna and the entire mounting bracket are damaged. There is an essential and big problem that each multi-element directional antenna in the UHF band and the VHF band falls down and cannot be used.

  Besides these conventional examples, four UHF or VHF band multi-element directional antennas connected in a horizontal / vertical stack are individually projected horizontally in the same direction with respect to the column, There is also a trial where the antennas are set individually on trials and errors and directed to a radio wave source at a high place and mounted on a support column. In this case, the above-mentioned elevation angles of four multi-element directional antennas are used. The setting work must be performed individually at a high place, and the setting work for each antenna elevation angle is extremely complicated, cumbersome and dangerous.

For this reason, in general, from the idea that the vertical directivity of a UHF or VHF band multi-element directional antenna for receiving horizontally polarized waves is much broader than the horizontal directivity, the multi-element directional antenna is used. Because these multi-element directional antennas cannot be installed with high precision, such as the transmission antenna of a satellite relay station installed on the mountain, cannot be accurately pointed. There is a big problem.
Therefore, in all the above-described conventional examples, a multi-element directional antenna for handling broadcast waves in the UHF or VHF band coming from high places such as terrestrial digital television broadcasts that can also be bidirectionally broadcast started in Japan. However, there is an essential and big problem that it cannot be dealt with at all as an elevation setting apparatus.

  This invention collects four multi-element directional antennas connected in a horizontal and vertical stack in order to receive as much as possible the incoming radio waves in the UHF band and VHF band such as terrestrial digital TV broadcast radio waves coming from high places. An object of the present invention is to obtain an elevation angle setting attachment device for a multi-element directional antenna that is strong against external force by making it possible to easily set an elevation angle toward the radio wave emission source and dispersing the elevation angle setting portion.

  The above-described object of the present invention is to install four UHF or VHF band multi-directional antennas on a substantially vertical column and set the elevation angle toward a radio wave emission source at a high place. The upper stick is attached to the pivot plate, which is fixed to the upper outer peripheral surface of the support post in the horizontal direction after being adjusted for horizontal rotation. The antennas protrude from the upper and lower parts of the left and right vertical sticks facing downward on the left and right sides one by one in the same direction, and the mounting plate is turned around the outer peripheral surface of the intermediate part of the column on the radio wave emission source side. It is fixed so that it can be fixed after dynamic adjustment, and the center mounting part of the lower stay, which has a symmetrical bent part on the mounting plate, is attached horizontally so that it can be fixed after turning around the axis. Outside each vertical stay on both sides By mounting the four post-rotating antennas on the surface so that they can be fixed after rotation, they constitute a column mounting device for four multi-element directional antennas. Then, by rotating the lower stay about the axis with respect to the mounting plate, the left and right bent parts are displaced back and forth, and the left and right vertical stays are set to four antennas with the center attachment part of the upper stay as a fulcrum. And turning toward the radio wave emission source at a high place, and after setting the elevation angle toward the radio wave emission source by collecting the four antennas together, firmly fixing each attachment portion in the temporarily fixed state, This can be achieved by making it possible to fix the set elevation angles of each of these antennas together.

Since the present invention employs the above-described means, the following effects can be obtained.
According to the first aspect of the present invention, in the temporarily fixed state of each attachment portion loosened from each attachment portion, the left and right vertical stays are attached together with the lower stay and the upper stay along the mounting plate and the pivot attachment plate. By turning the antenna horizontally as a fulcrum, after turning each antenna downward or below the radio wave emission source, the lower stay is turned around the axis to displace the left and right bent parts back and forth. Since both the peripheral surfaces of the lower stay that have passed through each of these bent portions push the outer peripheral surface of the left and right vertical stays in the direction of the radio wave emission source, each vertical stay acts as a radio wave emission source along with the four antennas with the upper stay as a fulcrum. The angle of elevation of each antenna can be set at a stroke toward the radio wave emission source at once, and then the set elevation angle of each antenna can be set by fixing each mounting part in the temporarily fixed state. Excellent that can be fixed together at once In addition to being effective, this fixed elevation is maintained for a very long period of time with each of the attachment parts distributed widely so as to be strong against large loads and lever stress applied to the four multi-element directional antennas. There is also an excellent effect that it was made.

  As in the second aspect of the present invention, if a U-bolt and a tightening nut are used for the attachment portion of the pivot plate / mounting plate and the attachment portion of the upper and lower stays with respect to the support column, the tightening nut is slightly changed. By simply loosening, each of the attachment parts can be easily temporarily fixed, and it becomes easy to set the elevation angle of the left and right reinforcing vertical stays together with the four antennas toward the radio wave emission source at a high place. Thereafter, by simply tightening the loosened tightening nut with a spanner, the set elevation angles of the multi-element directional antennas can be gathered and fixed easily and firmly.

  According to the invention of claim 3 of the present invention, the upper and lower stays are made of a tough round pipe material, and a ring groove extending in the circumferential direction is formed on the outer peripheral surface in the vicinity of the central attachment portion. Since the pivot plate and mounting plate are attached to the fixed U-bolts with the tightening nuts, these attachment portions are further strengthened, and the positioning guide of each attachment portion and the prevention of the attachment position deviation are prevented. This makes it possible to stably maintain the temporarily fixed state of each attachment portion in which the tightening nuts are loosened during the antenna elevation angle setting operation, so that the four antennas can be safely and easily raised to a radio wave emission source at a high place. The effect that it can be set can be added, and furthermore, as in the invention of claim 4 of the present invention, the vertical stays are connected to the left and right sides of the upper stay by L-shaped pipe joints, so that each of the stays is elongated. Can be configured It was able to add an effect that was easy to handle in all aspects, such as parts management, manufacturing, packing storage and transportation distribution and sale purchase and unpacking.

  As the best mode for carrying out the present invention, four multi-element directional antennas A in the UHF or VHF band are provided on a column 1 erected almost vertically on the roof of a building as shown in FIGS. When installing the high angle radio wave source, such as the Yamagami satellite station, with the angle of elevation set to the upper outer peripheral surface of the support column 1 on the opposite side of the radio wave source, the rigid pivot plate 2 is moved up and down as shown in the above figures. The two U-shaped bolts U and the tightening nuts N are fixed so that they can be fixed in the horizontal direction and fixed, and an upper stay 3 made of a tough round pipe is attached to the pivot plate 2 at its central attachment portion 3A. As shown in the above figures, it can be fixed to the left and right sides of the upper stay 3 on both the left and right sides. L-shaped pipe joint, in which the vertical stay 4 is usually called L bow The UHF band antennas A (or the VHF band multi-element directional antennas A) are respectively provided above and below the left and right vertical stays 4 as shown in the above figures. The nuts N and the nuts N are mounted in a distributed manner one by one in the same horizontal direction as shown in the above drawings via a known mounting seat M.

  Next, a strong mounting plate 5 is attached to the outer peripheral surface of the intermediate portion of the column 1 on the radio wave emission source side with the upper and lower U-bolts U and the tightening nuts N as shown in FIGS. Attached so that it can be fixed after the rotation is adjusted, and the center mounting portion 6B of the lower stay 6 made of a tough round pipe with the symmetrical bent portion 6A facing the radio wave emission source side is turned around the mounting plate 5 about the axis. The two left and right U-shaped bolts U and the fastening nuts N are mounted sideways as shown in the above figures so that they can be fixed after moving, and both sides of the lower stay 6 are respectively attached to the outer peripheral surfaces of the respective vertical stays 4. By attaching the U-shaped bolt U and the tightening nut N so as to be fixed after rolling and rotating as shown in the respective drawings and FIG. 5, the elevation setting column supporting device for the multi-element directional antenna A according to the present invention can be obtained. I was able to configure.

  However, in order to provide the vertical stay 4 on both sides of the upper stay 3 downward, the both ends of the upper stay 3 and the upper part of the vertical stay 4 are inserted into the insertion holes opened at both ends of the L-shaped pipe joint L. Or by firmly screwing the threaded portions of the upper stay 3 and the longitudinal stay 4 into the female threaded holes and the male threaded portions opened at both ends of the pipe joint L, the vertical stays 4 are directed downward on both sides of the upper stay 3. The upper stay 3 may be made long in advance, and both sides of the upper stay 3 may be bent downward as shown in FIG. 3 and the vertical stays 4 may be integrally formed downward on both sides of the upper stay 3.

The configuration of the present invention is as described above, and an example of its use will be described below.
First, except for the attachment portions of the antennas A, all the fastening nuts N in the attachment portions are slightly loosened to make the attachment portions temporarily fixed. After the support 3 is pivoted in the horizontal direction indicated by the arrow in FIG. 1 through the mounting plate 5 and the pivot plate 2 together with the stay 3, and each antenna A is directed downward of the radio wave emission source, or before that By rotating the lower stay 6 about the axis with respect to the mounting plate 5, the bent portion 6A of the lower stay 6 in the downward state shown in FIG. The left and right vertical stays 4 can be moved diagonally forward as shown in FIG. 2 on both sides of the lower stay 6 through the bent portion 6A. 2 with the antenna 3A as a fulcrum. Can pivot upward inclination toward the high place radio wave source of As may elevation setting at a stroke toward the radio wave source together four respective antennas.

  As the above-described elevation angle setting procedure, first, an incoming radio wave of horizontal polarization in the UHF or VHF band received by the four antennas A during the elevation angle setting process as described above is a coaxial cable (not shown because it may be a known one). ) Through a well-known horizontal / vertical stack mixed connection means and input to a well-known television receiver to make sure that the screen looks best, or the indication of a well-known field strength meter is maximized. As described above, the four antennas A are gathered together and rotated so as to be accurately directed to the radio wave emission source at a high place as described above, whereby the elevation angle and the left and right angles of each antenna A are gathered together. As shown in the above figures, the simultaneous setting can be made accurately.

Next, with the best holding angle set for each antenna A, while maintaining the best TV projection and the maximum value of the electric field strength meter, tighten the loosened tightening nut N this time. By tightening to four, the set elevation angles of the four multi-element directional antennas A that are accurately directed to the radio wave emission source at a high place can be firmly and stably fixed as shown in the above figures. These antennas A were able to stably receive and watch the incoming radio waves of the horizontally polarized wave in the UHF or VHF band for a long period of time in the best condition of the television screen as described above.
In addition, the above-mentioned fixed elevation angle state is extremely stable and long at each of the attachment portions that are largely dispersed as shown in the above figures so as to be strong against a large load and leverage stress applied mainly to the four multi-element directional antennas. We were able to maintain the period.

  The pivot plate 2 is firmly fixed to the upper end of the column 1 by welding or the like on a tough lid cylinder (not shown because it may be a known one) that can be fixed after horizontal rotation adjustment. The pivot plate 2 may be fixed to the upper portion of the frame so that it can be fixed together with the lid cylinder after horizontal rotation adjustment. Instead of using the tightening nut N, each of the sticks is pivotally adjusted around the axis with a well-known tightening band with a tightening screw, and then the tightening band is firmly tightened and attached, or a wire or tough Each of the stays may be tentatively fixed with a fastening string, and after the stays are rotated and adjusted around the axis, the wire and the fastening string may be firmly fastened and attached.

  A ring groove 7 as shown in FIGS. 1 and 5 extending in the circumferential direction is formed in parallel on the outer peripheral surface in the vicinity of the attachment portions on the left and right sides of the lower stay 6, and a U-shaped bolt U engaged and fixed in the groove 7. By attaching the left and right vertical stays 4 with the tightening nuts N as shown in FIG. 5, the attachment portions are further strengthened, and the positioning guides of the attachment portions and the prevention of the attachment position deviation are prevented. In addition, the temporarily fixed state of the attachment portion in which the tightening nut N is loosened can be stably maintained.

  The left and right bent portions 6A of the lower stay 6 can be attached to the mounting plate 5 as shown in FIG. 1, but in this case, both sides of the lower stay 6 are stretched toward the radio wave emission source. The left and right vertical stays 4 can be set obliquely upward with an inclination angle smaller than that of the above-described embodiment as shown in FIG. 2, and the lower stay bending part 6A is opposite to the attachment direction described above. 3, the mounting plate 5 is replaced with a lower column position as shown in FIG. 3, and the central mounting portion 6B of the lower stay 6 is moved to the above-described position. By attaching it sideways to the outer peripheral surface at a position slightly below the support column 1 as shown in FIG. 3 rather than the attachment position shown in FIG. 1, the elevation angle of each antenna A can be set finely with a smaller elevation angle setting variable range. .

  Further, the mounting plate 5 is replaced on the mounting side of the pivot mounting plate 2 mounted on the upper portion of the support column 1 as shown in FIG. 4, and the left and right bent portions 6A of the lower stay 6 are illustrated on the mounting plate 5. As shown in Fig. 4, the antennas can be mounted directly below or directly above, so that the elevation angle can be set even when the four antennas A are put together and directed toward the substantially horizontal radio wave emission source as shown in Fig. 4.

In each of the illustrated examples described above, the elevation angle setting and attachment device for the multi-element directional antenna A for receiving incoming radio waves in the horizontally polarized wave in the UHF band has been shown. However, the length and diameter of each of the stays used in the present invention is slightly larger. Thus, the present invention can naturally be implemented as an elevation angle setting attachment device for the multi-element directional antenna A in the VHF band.
Further, if a well-known vertical polarization receiving multi-element directional antenna A is used for each antenna A in each of the illustrated examples, it is possible to naturally receive an incoming radio wave having a vertically polarized wave in the UHF or VHF band.

The rear perspective view showing an example of the embodiment of the present invention The front perspective view which made the state different from FIG. Rear perspective view showing an example of another embodiment of the present invention Rear perspective view showing still another embodiment of the present invention. The expansion perspective view which shows the attachment example of stays in this invention

Explanation of symbols

A ... Multi-element directional antenna 1 in UHF or VHF band 1 ... Column 2 ... Pivoting plate 3 ... Upper stay 3A ... Left and right bent part 3B ... Upper stay center attaching part 4 ... Vertical stay 5 ... Mounting plate 6 ... Lower stay 7 ... Lower stay left and right outer ring grooves U ... U-bolt N ... Tightening nut

Claims (4)

  When mounting four UHF or VHF band multi-element directional antennas on an almost vertical column and setting the elevation angle toward a radio wave emission source at a high place, it is horizontal to the upper outer peripheral surface of the column on the opposite side of the radio wave emission source. The upper stay is attached to the pivot plate that can be fixed after the rotation adjustment. The antennas are protruded from the upper and lower parts of the vertical sting in the same direction one by one, while the mounting plate is fixed to the outer peripheral surface of the intermediate part of the column on the radio wave emission source side so that it can be fixed. Then, the central attachment portion of the lower stay having a symmetrical bent portion on the mounting plate is attached horizontally so that it can be fixed after rotating about the axis, and the left and right sides of the lower stay are respectively attached to the vertical stays. Fixed after rolling contact with the outer surface By attaching it as possible, it constitutes a column attachment device for four multi-element directional antennas, and the lower stay is attached to the attachment plate in the temporarily fixed state of each attachment portion loosened from each attachment portion. By turning around the axis, the left and right bends are displaced back and forth, and each of the left and right vertical stays is directed to a high-frequency radio wave emission source along with the four antennas with the center attachment part of the upper stay as a fulcrum. After rotating and setting the four antennas together toward the radio wave emission source, the elevation angle is set to the radio wave emission source, and then the temporarily fixed attachment portions are firmly fixed, so that the set elevation angles of the antennas are set to four. Multi-element directional antenna elevation setting attachment device that can be fixed together.   2. The elevation setting apparatus for mounting a multi-element directional antenna according to claim 1, wherein a U-bolt and a fastening nut are used for each of the stays and each attachment part of the pivot plate / mounting plate.   Each of the upper and lower stays is made of a tough round pipe material, and a ring groove extending in the circumferential direction is formed on the outer peripheral surface in the vicinity of the central attachment portion. By attaching the mounting plate with the tightening nut, it is possible to guide the positioning of the mounting portion and prevent the displacement of the mounting position, and stably maintain the temporarily fixed state of the mounting portion with the tightening nut loosened. The elevation angle setting attachment device for a multi-element directional antenna according to claim 2, which is made possible.   4. An elevation angle setting attachment device for a multi-element directional antenna according to claim 1, further comprising vertical stays connected to left and right sides of the upper stay by L-shaped attachments.

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