Parabolic antenna

Abstract

To create a parabolic antenna which is easy to assemble and disassemble.SOLUTION: A parabolic antenna 1 according to the present invention is configured from a reflection mirror 10 where a reflection mirror supporter 11 is provided on the back, an adjuster 14 composed of a tilt angle adjustment part 21 and an azimuthal angle adjustment part 22, and a pair of fasteners 15-1, 15-2, so that it is made possible to reduce component counts. A support plate 11b of the reflection mirror supporter 11 is pivotably fastened to the tilt angle adjustment part 21 with manually tightenable third screw 14a and fourth screw 14b, and the pair of fasteners 15-1, 15-2 are fastenable to a wall surface. The pair of fasteners 15-1, 15-2 are pivotably fastened to the adjuster 14 with manually tightenable first screw 16a and second screw 16b. Thus, it is made possible to easily attach and detach the parabolic antenna 1 without requiring a tool.SELECTED DRAWING: Figure 28

Description

[Technical field]

[0001] The present invention relates to a parabolic antenna that is easy to assemble and disassemble. [Background technology]

[0002] Satellite broadcasting includes BS broadcasting and CS broadcasting, and parabolic antennas are used to receive conventional satellite broadcasting. Conventional parabolic antennas are mainly of the type that are fastened to poles or the like using tools with metal fittings or bolts. Here, a conventional parabolic antenna fixed to a pole is disclosed in Patent Document 1. The parabolic antenna disclosed in FIG. 9 of Patent Document 1 is shown in FIG. 31 as an example of a configuration for fixing the parabolic antenna to a pole. FIG. 31 is an assembly diagram showing a perspective view of a configuration for attaching a conventional parabolic antenna to a pole. As shown in FIG. 31, in a conventional parabolic antenna 100, a first antenna mounting bracket 121 is fixed to the back of a reflector 110 by four bolts, and a rear end of an arm 111 is fixed to the approximately center of the first antenna mounting bracket 121 in the vertical direction by two bolts 112. A primary radiator 112 is provided at the tip of the arm 111. The primary radiator 112 is provided at the focal position of the reflector 110, and the primary radiator 112 receives radio waves reflected by the reflector 110, for example, radio waves from a satellite broadcast.

[0003] The first antenna mounting bracket 121 has a U-shaped cross section, with parallel flat plates protruding backward. The second antenna mounting bracket 122 also has a U-shaped cross section, and is sandwiched from the outside by the parallel flat plates of the first antenna mounting bracket 121. A bolt 123 is inserted into an insertion hole formed in the upper part of the parallel flat plates of the first antenna mounting bracket 121, and the bolt 123 is screwed into the upper side of two screw holes formed in a row in the vertical direction at the tip of the parallel flat plates of the second antenna mounting bracket 122. The bolt 123 inserted into the arc-shaped groove formed in the lower part of the parallel flat plates of the first antenna mounting bracket 121 is screwed into a screw hole formed in the lower part of the tip of the parallel flat plates of the second antenna mounting bracket 122. This allows the lower bolt 123 to slide in the arc-shaped groove with the upper bolt 123 as a rotation axis, making it possible to adjust the elevation angle of the reflector 110. Also, the parabolic antenna 100 can be fixed to the pole 130 by inserting bolts 132 into both sides and fastening them so that the pole 130 is sandwiched between the back surface of the second antenna mounting bracket 122 and the pole fixing bracket 131. In this case, the parabolic antenna 100 can be rotated with respect to the pole 130 by loosening the two bolts 132, making it possible to adjust the azimuth angle of the parabolic antenna 100. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 5-235630 Summary of the Invention [Problem to be solved by the invention]

[0005] Conventional parabolic antennas have a problem in that they are difficult to install or remove because of the large number of parts they have. In this case, they are fixed to the pole by fastening metal fittings or bolts using tools, so there is also a problem in that they cannot be installed or removed without using tools. Furthermore, with conventional parabolic antennas, when adjusting the azimuth angle, it was necessary to loosen the bolts that secured the antenna to the pole, which created the risk of the parabolic antenna falling off, and this created the problem that it was not easy to adjust the azimuth angle. Furthermore, while it is possible to install a parabolic antenna on a wall, conventional parabolic antennas do not come with mounting brackets for installation on a wall, so there is a problem that if you install it on a wall, you will need a special mounting bracket to install it on a wall.

[0006] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a parabolic antenna which solves the above-mentioned problems and which is easy to assemble and disassemble. [Means for solving the problem]

[0007] The parabolic antenna of the present invention, which can achieve the above-mentioned object of the present invention, comprises a parabolic reflector which reflects radio waves and has a reflector support on its back surface, an arm which has a primary radiator on one end and the other end which is detachably attached to the reflector support, a primary radiator which is provided on one end of the arm and located at the focal position of the parabolic reflector and receives radio waves reflected from the parabolic reflector, an adjustment device which comprises a cylindrical azimuth angle adjustment section and a flat elevation angle adjustment section formed so as to protrude from the outer circumferential surface of the azimuth angle adjustment section, The reflector support has a flat support plate that protrudes rearward, and the elevation angle adjustment portion is disposed opposite the support plate. The support plate is rotatably supported relative to the elevation angle adjustment portion, thereby making it possible to adjust the elevation angle of the parabolic reflector. The reflector support has a main feature that it is capable of being fixed to a substrate and that the upper and lower portions of the azimuth angle adjustment portion are rotatably supported by the support plate. The azimuth angle of the parabolic reflector can be adjusted by rotating the azimuth angle adjustment portion relative to the pair of fasteners.

[0008] In the parabolic antenna of the present invention described above, the pair of fasteners are formed with a first insertion hole having a circular cross section and closed on one side by a closed surface, and a first insertion hole formed in the center of the closed surface, the azimuth angle adjustment portion is formed with a first female thread in the center of the upper end surface and the lower end surface, a first screw inserted into the first insertion hole of one of the pair of fasteners is screwed into the first female thread formed on the upper end surface, a second screw inserted into the first insertion hole of the other of the pair of fasteners is screwed into the first female thread formed on the lower end surface, and the first screw and the second screw are attached with handles that can be tightened by hand. Furthermore, in the parabolic antenna of the present invention, a screw hole and an arc-shaped groove portion are formed in the elevation angle adjustment portion, a second insertion hole and a second female screw are formed in the support plate, a third screw inserted into the arc-shaped groove portion is screwed into the second female screw, a fourth screw inserted into the second insertion hole is screwed into the screw hole, and the third screw and the fourth screw are provided with handles that can be tightened by hand. Furthermore, in the parabolic antenna of the present invention, the pair of fasteners comprises a T-shaped main body formed in a T shape, and the T-shaped main body is composed of a central portion in which the insertion hole is formed, and a pair of mounting portions extending on both sides from the central portion and capable of being fixed to a target body. Furthermore, in the parabolic antenna of the present invention, a recess capable of abutting against a pole is formed in the center of the pair of mounting parts. Furthermore, in the parabolic antenna of the present invention, the reflector support provided on the rear surface of the parabolic reflector is integrally formed with the parabolic reflector. Effect of the Invention

[0009] The parabolic antenna of the present invention is composed of a parabolic reflector with a reflector support on the back side, an adjustment tool, and a pair of fasteners, which reduces the number of parts, thereby making it easier to install and remove the parabolic antenna. In addition, in the parabolic antenna of the present invention, the screw that fastens the azimuth adjustment part of the adjustment tool to the fastener and the screw that fastens the elevation adjustment part of the adjustment tool to the support plate of the reflector support are provided with handles that can be tightened by hand, so that the parabolic antenna can be attached and detached without using tools. In this case, since the parabolic antenna is attached to the mounting body by a pair of fasteners, there is no risk of the parabolic antenna falling off even if the screws that fasten the azimuth adjustment part of the adjustment tool to the fastener are loosened. Furthermore, in the parabolic antenna of the present invention, since the pair of fasteners is provided with a pair of mounting portions that can be installed on the wall surface to be mounted, the parabolic antenna can be mounted on the wall surface without the need for dedicated mounting brackets. [Brief description of the drawings]

[0010] [Figure 1] FIG. 2 is a right side view showing the configuration of the parabolic antenna according to the embodiment of the present invention. [Diagram 2]FIG. 2 is a left side view showing the configuration of the parabolic antenna according to the embodiment of the present invention. [Diagram 3] 1 is a front view showing the configuration of a parabolic antenna according to an embodiment of the present invention; [Figure 4] FIG. 2 is a rear view showing the configuration of the parabolic antenna according to the embodiment of the present invention. [Diagram 5] FIG. 2 is a top view showing the configuration of a parabolic antenna according to an embodiment of the present invention. [Figure 6] FIG. 2 is a bottom view showing the configuration of a parabolic antenna according to an embodiment of the present invention. [Figure 7] 1 is a front perspective view showing the configuration of a parabolic antenna according to an embodiment of the present invention; [Figure 8] FIG. 2 is a rear perspective view showing the configuration of the parabolic antenna according to the embodiment of the present invention. [Figure 9] 1 is a front perspective view showing the configuration of a parabolic reflector in a parabolic antenna according to an embodiment of the present invention; [Figure 10] 2 is a rear perspective view showing the configuration of a parabolic reflector in the parabolic antenna according to the embodiment of the present invention. FIG. [Figure 11] 1 is a perspective view of one side showing a configuration of an arm and a primary radiator in a parabolic antenna according to an embodiment of the present invention. [Figure 12] 4 is a perspective view showing the other side of the configuration of the arm and the primary radiator of the parabolic antenna according to the embodiment of the present invention. FIG. [Figure 13] FIG. 2 is a side view showing the configuration of an adjustment tool for a parabolic antenna according to an embodiment of the present invention. [Figure 14] FIG. 2 is a front view showing the configuration of an adjustment tool for a parabolic antenna according to an embodiment of the present invention. [Figure 15] FIG. 2 is a rear view showing the configuration of an adjustment tool for the parabolic antenna according to the embodiment of the present invention. [Figure 16] FIG. 2 is a top view showing the configuration of an adjustment tool for a parabolic antenna according to an embodiment of the present invention. [Figure 17] FIG. 2 is a perspective view showing a configuration of an adjustment tool for a parabolic antenna according to an embodiment of the present invention. [Figure 18]1 is a front perspective view showing the configuration of a fastener for a parabolic antenna according to an embodiment of the present invention; [Figure 19] FIG. 2 is a rear perspective view showing the configuration of a fastener for a parabolic antenna according to an embodiment of the present invention. [Figure 20] FIG. 4 is another perspective view of the front side showing the configuration of the fastener for the parabolic antenna according to the embodiment of the present invention. [Figure 21] 11 is another perspective view of the rear side showing the configuration of the fastener for the parabolic antenna according to the embodiment of the present invention. FIG. [Figure 22] FIG. 4 is a rear view showing the configuration of the attachment means for the adjustment tool and the fastener in the parabolic antenna according to the embodiment of the present invention. [Figure 23] FIG. 2 is a front view showing the configuration of an attachment means for an adjustment tool and a fastener in the parabolic antenna according to the embodiment of the present invention. [Figure 24] 1 is a side view showing a configuration of an attachment means for an adjustment tool and a fastener in a parabolic antenna according to an embodiment of the present invention. FIG. [Diagram 25] FIG. 2 is a top view showing the configuration of the attachment means for the adjustment tool and the fastener in the parabolic antenna according to the embodiment of the present invention. [Figure 26] FIG. 2 is a perspective view showing a configuration of an attachment means for an adjustment tool and a fastener in a parabolic antenna according to an embodiment of the present invention. [Figure 27] FIG. 2 is an assembly diagram showing in perspective the configuration of the mounting means for the adjustment tool and the fastener in the parabolic antenna according to the embodiment of the present invention. [Figure 28] FIG. 1 is an assembly diagram showing, in a perspective view, the configuration of a parabolic antenna according to an embodiment of the present invention. [Figure 29] 1 is a side view showing a configuration in which a parabolic antenna according to an embodiment of the present invention is attached to a pole. [Diagram 30] FIG. 2 is a rear perspective view showing a configuration in which a parabolic antenna according to an embodiment of the present invention is attached to a pole. [Diagram 31] FIG. 1 is an assembly diagram showing in perspective a configuration for mounting a conventional parabolic antenna on a pole. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] <Parabolic antenna according to an embodiment of the present invention> The configuration of a parabolic antenna 1 according to an embodiment of the present invention is shown in Fig. 1 to Fig. 8. Fig. 1 is a right side view showing the configuration of a parabolic antenna 1 according to an embodiment of the present invention, Fig. 2 is a left side view thereof, Fig. 3 is a front view thereof, Fig. 4 is a rear view thereof, Fig. 5 is a top view thereof, Fig. 6 is a bottom view thereof, Fig. 7 is a perspective view of the front side thereof, and Fig. 8 is a perspective view of the rear side thereof. The parabolic antenna 1 according to the embodiment of the present invention shown in these figures includes a reflector 10, a primary radiator 13 consisting of a feed horn and a converter, and an arm 12 for placing the feed horn of the primary radiator 13 at the focal position of the reflector 10. The reflector 10 has an elliptical mirror surface having a shape obtained by cutting out a part of a parabolic surface, and the reflector 10 and the primary radiator 13 placed at the focal position of the reflector 10 constitute an offset parabolic antenna. The feed horn is provided so as to protrude from the front surface of the converter and is placed at the focal position of the reflector 10. The feed horn receives satellite broadcasting radio waves reflected by the reflector 10, and the frequency of the satellite broadcasting received by the feed horn is 11.7 GHz to 12.75 GHz. The converter converts the received satellite broadcasting signal into a signal in an intermediate frequency band and outputs it from an output terminal that is a coaxial connector. The intermediate frequency band of the BS / CS broadcasting output from the output terminal is 1032 MHz to 3224 MHz.

[0012] A reflector support 11 is integrally formed on the back surface of the reflector 10, and the reflector 10 and the reflector support 11 are integrally structured. A primary radiator 13 is fixed to one end of an arm 12, and the other end of the arm 12 is detachably fixed to the lower part of the reflector support 11. A flat support plate 11b (described later) is formed from the upper part to the center of the reflector support 11 so as to protrude backward, and an adjustment tool 14 is fixed to the support plate 11b so as to be rotatable in a vertical plane. As a result, the reflector 10 is supported rotatably in a vertical plane relative to the adjustment tool 14, so that the elevation angle of the reflector 10 can be adjusted. After the adjustment of the elevation angle is completed, the elevation angle of the parabolic antenna 1 is fixed by tightening the third screw 14a and the fourth screw 14b. The third screw 14a and the fourth screw 14b have handles that can be tightened by hand. The cylindrical upper part of the adjustment tool 14 is supported by the first fastener 15-1 so as to be rotatable in a horizontal plane, and the cylindrical lower part of the adjustment tool 14 is supported by the second fastener 15-2 so as to be rotatable in a horizontal plane. As a result, the reflector 10 is supported by the pair of fasteners 15-1 and 15-2 so as to be rotatable in a horizontal plane, so that the azimuth angle of the reflector 10 can be adjusted. After the azimuth angle adjustment is completed, the azimuth angle of the parabolic antenna 1 is fixed by fastening the first screw 16a and the second screw 16b. The first screw 16a and the second screw 16b are provided with handles that can be tightened by hand. As described above, the parabolic antenna 1 according to the embodiment of the present invention uses screws with handles that can be tightened by hand, and therefore can be assembled and disassembled without the need for tools.

[0013] Since the pair of fasteners 15-1, 15-2 can be attached to a wall surface, the parabolic antenna 1 of the embodiment of the present invention can be attached to a wall surface by the pair of fasteners 15-1, 15-2. Also, the surface that is attached to the wall surface by the pair of fasteners 15-1, 15-2 is made flat, and a recess 15f, which will be described later, is provided in the center, and by clamping the pole between this recess 15f and the pole attachment tool, the parabolic antenna 1 of the embodiment of the present invention can be attached to a pole with a circular or rectangular cross section.

[0014] <Reflector of Parabolic Antenna according to an embodiment of the present invention> The configuration of the reflector 10 in the parabolic antenna 1 according to the embodiment of the present invention is shown in Fig. 9 and Fig. 10. Fig. 9 is a perspective view of the front side showing the configuration of the reflector 10 in the parabolic antenna 1 according to the embodiment of the present invention, and Fig. 10 is a perspective view of the rear side. The reflector 10 shown in Figs. 9 and 10 has an elliptical mirror surface formed by cutting out a part of a parabolic surface, and the reflector 10 and a primary radiator 13 arranged at the focal position of the reflector 10 constitute an offset parabolic antenna. A reflector support 11 is integrally formed on the back surface of the reflector 10. The reflector support 11 is formed vertically from above the center of the back surface of the reflector 10 to the bottom side of the reflector 10. A flat support plate 11b is formed so as to protrude backward from the top to the center of the reflector support 11, and the rear side of the support plate 11b is an oblique side whose width narrows as it goes upward. An insertion hole 11c is formed near the upper side of the oblique side where the width of the support plate 11b narrows, and a female screw 11d is formed near the lower side of the oblique side where the width of the support plate 11b widens. An arm fitting portion 11a is formed at the bottom of the reflector support 11, and the arm fitting portion 11a is made of a holding piece 11e formed in a square tube shape with a slit formed on the front surface, and a step 11f is formed in the parallel plate-like portion facing the upper part of the holding piece 11e. An insertion portion 12a (described later) formed at the other end of the arm 12 can be detachably fixed to the arm fitting portion 11a. The reflector 10, which has the reflector support 11 integrally formed on its back surface, can be made of metal, but can also be made of synthetic resin. If it is made of synthetic resin, the mirror surface is plated with metal.

[0015] <Arm and primary radiator of parabolic antenna according to embodiment of the present invention> The configurations of arm 12 and primary radiator 13 in parabolic antenna 1 according to an embodiment of the present invention are shown in Fig. 11 and Fig. 12. Fig. 11 is a front perspective view showing the configurations of arm 12 and primary radiator 13 in parabolic antenna 1 according to an embodiment of the present invention, and Fig. 12 is a rear perspective view thereof. The arm 12 shown in Figs. 11 and 12 has a wide rectangular cross section, a tip portion bent obliquely upward, and a rear end portion bent upward at a substantially right angle. A primary radiator 13 shown in Figs. 11 and 12 is attached to one end, which is the tip of the arm. The primary radiator 13 is composed of a conical feed horn and a rectangular converter whose height is lower than the width of the feed horn attached to the front surface. An insertion section 12a having a rectangular cross section is formed at the other end, which is bent upward at a right angle from the rear end of the arm 12, and wedge-shaped extension pieces 12b are formed on both sides of the tip of the insertion section 12a and extend upward. The extension pieces 12b are wedge-shaped with a narrower width toward the tip, and engagement protrusions 12c are formed on the outer surfaces of the two extension pieces 12b. The insertion portion 12a can be fitted into the arm fitting portion 11a of the reflector support 11, and when fitted, the insertion portion 12a is held by the holding piece 11e, and the engagement protrusions 12c of the pair of extension pieces 12b engage with the step 11f at the top of the holding piece 11e. This allows the arm 12 to be securely attached to the reflector 10. Furthermore, when a force is applied to both sides so as to narrow the gap between the pair of extension pieces 12b, the engagement protrusions 12c come off the step 11f, and the arm 12 can be removed from the reflector 10. In this way, the rear end of arm 12 is detachably fixed to arm fitting portion 11a of reflector support 11 without the need for tools. When arm 12 is attached to reflector 10, the feed horn of primary radiator 13 is positioned at the focal position of reflector 10. Arm 12 can be made of metal, but can also be made of synthetic resin. Also, the feed horn of primary radiator 13 is made of metal, and the converter has a metal housing that houses a board on which a converter circuit is assembled. The feed horn and converter are housed in a synthetic resin case.

[0016] <Parabolic antenna adjustment tool according to an embodiment of the present invention> The configuration of the adjustment tool 14 in the parabolic antenna 1 of the embodiment of the present invention is shown in Fig. 13 to Fig. 17. Fig. 13 is a side view showing the configuration of the adjustment tool 14 in the parabolic antenna 1 of the embodiment of the present invention, Fig. 14 is its front view, Fig. 15 is its rear view, Fig. 16 is its top view, and Fig. 17 is its perspective view. The adjustment tool 14 shown in these figures is composed of a cylindrical azimuth angle adjustment part 22 and a flat elevation angle adjustment part 21 formed integrally with the azimuth angle adjustment part 22 so as to protrude from the outer circumferential surface of the azimuth angle adjustment part 22. A female screw 22a is formed on the central axis of the upper end surface of the cylindrical azimuth angle adjustment part 22 as shown in Fig. 16, and a female screw 22a is similarly formed on the central axis of the lower end surface.

[0017] The elevation angle adjustment part 21 is made of a rectangular flat plate of a predetermined thickness, and the two corners of the protruding front part are chamfered. A screw hole 21a is formed in the upper part of the front part of the elevation angle adjustment part 21, and a nut 21c communicating with the screw hole 21a is provided on one surface of the elevation angle adjustment part 21. In addition, an arc-shaped groove part 21b, which is an arc with the screw hole 21a as the central axis, is formed from the lower part to the center part of the front part of the elevation angle adjustment part 21. The adjustment tool 14 can be made of metal, but can also be made of synthetic resin.

[0018] <Fixing device for a parabolic antenna according to an embodiment of the present invention> The configuration of the fastener 15 in the parabolic antenna 1 according to the embodiment of the present invention is shown in Fig. 18 to Fig. 21. Fig. 18 is a front perspective view showing the configuration of the fastener 15 in the parabolic antenna 1 according to the embodiment of the present invention, Fig. 19 is a rear perspective view thereof, Fig. 20 is another front perspective view thereof, and Fig. 21 is another rear perspective view thereof. The fastener 15 shown in these figures is composed of a T-shaped body 15a formed in a T-shape, and the tip of the central part of the T-shaped body 15a, which corresponds to the vertical bar of the T, is formed in a cylindrical shape, and an insertion hole 15e with a circular cross section is formed inside. One side of the insertion hole 15e is a closed surface, and an insertion hole 15b is formed in the center of the closed surface. In addition, the parts extending from both sides of the T-shaped body 15a, which corresponds to the horizontal bar of the T, are each formed as a mounting part 15c. The rear surfaces of the pair of mounting parts 15c are flat surfaces, and a mounting long hole 15d is formed in the center of each mounting part 15c. Both edges of each mounting part 15c are formed with rising parts toward the front side, and a hexagonal nut can be inserted into the rising parts so that it cannot rotate, and the screw hole of the inserted nut faces the mounting long hole 15d. The fastener 15 can be attached to a wall surface by abutting the flat surfaces of the pair of mounting portions 15c against the wall surface and screwing the screws inserted through the elongated mounting holes 15d into the wall surface. A recess 15f is formed in the center between the pair of mounting portions 15c. The recess 15f is designed to come into contact with a circular or rectangular pole. The fastener 15 can be made of metal, but can also be made of synthetic resin.

[0019] <Means for mounting a parabolic antenna according to an embodiment of the present invention> The mounting means of the parabolic antenna 1 of the embodiment of the present invention is composed of the adjustment tool 14, the first fastener 15-1, and the second fastener 15-2, and the configuration of the mounting means composed of the adjustment tool 14, the first fastener 15-1, and the second fastener 15-2 is shown in Fig. 22 to Fig. 27. Fig. 22 is a rear view showing the configuration of the mounting means in the parabolic antenna 1 of the embodiment of the present invention, Fig. 23 is a front view thereof, Fig. 24 is a side view thereof, Fig. 25 is a top view thereof, and Fig. 26 is a perspective view thereof. Also, Fig. 27 is an assembly drawing showing in a perspective view the assembly configuration of the mounting means in the parabolic antenna 1 of the embodiment of the present invention. The mounting means shown in these figures is composed of an adjustment tool 14, a first fastener 15-1 and a second fastener 15-2, with the adjustment tool 14 having the configuration shown in Figures 13 to 17 above, and the first fastener 15-1 and the second fastener 15-2 having the configuration of the fastener 15 shown in Figures 18 to 21.

[0020] The assembly of the mounting means will be described with reference to Fig. 27. When assembling the mounting means, first, the first fastener 15-1 is placed on the adjustment tool 14, and the second fastener 15-2 is placed below the adjustment tool 14. In this case, the second fastener 15-2 is turned upside down so that the fitting hole 15e of the first fastener 15-1 faces the fitting hole 15e of the second fastener 15-2. Then, the cylindrical upper end of the azimuth angle adjustment part 22 of the adjustment tool 14 is fitted into the fitting hole 15e of the first fastener 15-1, and the cylindrical lower end of the azimuth angle adjustment part 22 is fitted into the fitting hole 15e of the second fastener 15-2. Next, the first screw 16a is inserted into the insertion hole 15b of the first fastener 15-1 and screwed into the female screw 22a formed on the upper surface of the azimuth angle adjustment part 22, and the second screw 16b is inserted into the insertion hole 15b of the second fastener 15-2 and screwed into the female screw 22a formed on the lower surface of the azimuth angle adjustment part 22. The mounting means assembled in this manner is shown in Figures 22 to 26. When the first screw 16a and the second screw 16b are not tightened, the azimuth angle adjustment part 22 is rotatably supported with respect to the first fastener 15-1 and the second fastener 15-2, and when the first screw 16a and the second screw 16b are tightened, the azimuth angle adjustment part 22 is fixed to the first fastener 15-1 and the second fastener 15-2.

[0021] <Assembly of a parabolic antenna according to an embodiment of the present invention> FIG. 28 shows a perspective assembly diagram of the assembly structure of the parabolic antenna 1 according to the embodiment of the present invention. When assembling the parabolic antenna 1 of the embodiment of the present invention, the insertion portion 12a of the arm 12 is fitted into the arm fitting portion 11a of the reflector support 11, and the arm 12 supporting the primary radiator 13 is attached to the reflector 10. Next, although not shown, the flat surfaces of the pair of mounting portions 15c of the first fastener 15-1 and the second fastener 15-2 in the mounting means assembled as described in Fig. 27 are abutted against a predetermined position on the wall surface where the parabolic antenna 1 is to be mounted, and screws are inserted into the long mounting holes 15d of each mounting portion 15c and screwed into the wall surface. This causes the first fastener 15-1 and the second fastener 15-2 to be fixed to the wall surface, and the mounting means to be mounted at the predetermined position on the wall surface. Next, the surface of the flat elevation angle adjustment portion 21 of the adjustment tool 14 in the mounting means is arranged to face the surface of the flat support plate 11b of the reflector support tool 11. Then, the fourth screw 14b is inserted into the insertion hole 11c formed in the support plate 11b and screwed into the nut 21c via the screw hole 21a formed in the elevation angle adjustment portion 21. Next, the third screw 14a is inserted into the arc-shaped groove portion 21b formed in the elevation angle adjustment portion 21 and screwed into the female screw 11d formed in the support plate 11b.

[0022] When the third screw 14a and the fourth screw 14b are not fastened, the reflecting mirror 10 is supported so as to be rotatable about the fourth screw 14b within the range of the length of the arc-shaped groove portion 21b in a plane perpendicular to the elevation angle adjustment portion 21. When the third screw 14a and the fourth screw 14b are fastened, the reflecting mirror 10 is fixed to the elevation angle adjustment portion 21. That is, when the mounting means consisting of the adjustment tool 14 and the first and second fasteners 15-1 and 15-2 is fixed to a wall surface, the first and second screws 16a and 16b are not fastened, and the third and fourth screws 14a and 14b are not fastened, the reflector 10 is rotated in a horizontal plane to adjust the azimuth angle of the reflector 10, and then the reflector 10 is rotated in a vertical plane to adjust the elevation angle of the reflector 10. By repeatedly adjusting the azimuth angle and elevation angle of the reflector 10, the first and second screws 16a and 16b are fastened, and the third and fourth screws 14a and 14b are fastened when the satellite broadcast reception level is at its highest. This completes the assembly of the parabolic antenna 1 according to the embodiment of the present invention. Since the first screw 16a, the second screw 16b, the third screw 14a, and the fourth screw 14b are screws with handles that can be tightened by hand, the assembly of the parabolic antenna 1 according to the embodiment of the present invention can be performed without the need for tools. Therefore, the removal of the parabolic antenna 1 according to the embodiment of the present invention can also be performed without the need for tools.

[0023] <Attachment of a parabolic antenna to a pole according to an embodiment of the present invention> The structure for mounting the parabolic antenna 1 of the embodiment of the present invention on a pole is shown in Figures 29 and 30. Figure 29 is a side view showing the structure for mounting the parabolic antenna 1 of the embodiment of the present invention on a pole, and Figure 30 is a perspective view of the rear side thereof. As shown in these figures, the parabolic antenna 1 according to the embodiment of the present invention can be attached to the pole 30 by facing the two mounting parts 15c of the first fastener 15-1 to the elongated plate-like pole mounting bracket 31a and holding the pole 30 therebetween, and by facing the two mounting parts 15c of the second fastener 15-2 to the elongated plate-like pole mounting bracket 31b and holding the pole 30 therebetween. In more detail, the pole mounting brackets 31a and 31b are made of metal and have the same configuration and shape, have a vertical recess in the center, and have long holes at both ends. When attaching the parabolic antenna 1, the arm 12 and the above-mentioned attachment means are attached to the reflector 10. Next, the attachment bolts 32 are inserted into the two long holes of the pole mounting bracket 31a and then inserted into the long attachment holes 15d formed in the pair of attachment parts 15c of the first fastener 15-1. Then, nuts are screwed onto the tips of the two bolts protruding from the long mounting holes 15d. Furthermore, the mounting bolts 32 are inserted into the two long holes of the pole mounting bracket 31b, and then into the long mounting holes 15d formed in the pair of mounting portions 15c of the second fastener 15-2. Then, nuts are screwed onto the tips of the two bolts protruding from the long mounting holes 15d. In this case, the nuts are hexagonal nuts, and the nuts are fitted into the respective mounting portions 15c so as not to rotate as described above.

[0024] Next, the pole 30 is placed between the recesses 15f formed in the first fastener 15-1 and the second fastener 15-2 and the recesses formed in the pole mounting brackets 31a and 31b. After adjusting the parabolic antenna 1 so that it faces approximately in the direction in which the radio waves are coming, the four mounting bolts 32 are fastened. This allows the parabolic antenna 1 of the embodiment of the present invention to be attached to the pole 30. The pole 30 can be a pole fixed to a stand such as a tripod, and by attaching the parabolic antenna 1 of the embodiment of the present invention to a pole fixed to a stand, the parabolic antenna 1 can be installed indoors or on a desk. In addition, since it is a portable parabolic antenna, it can be assembled when a disaster occurs, making it possible to watch satellite broadcasts. [Industrial Applicability]

[0025] The parabolic antenna according to the embodiment of the present invention described above uses a screw with a hand-tightened handle, so it can be easily assembled and disassembled by hand without using tools, and can be quickly assembled and easily disassembled for storage, and can be installed at a receiving location from a storage location when needed, and can be instantly stored at a storage location when not needed. In this case, the screw with the hand-tightened handle is, for example, an M5 male screw with a length of 20 mm, and the handle is a knob with a diameter of 20 mm to 30 mm. In the parabolic antenna according to the embodiment of the present invention described above, a screw hole and an arc-shaped groove are provided in the elevation angle adjustment portion of the adjustment tool, and an insertion hole and a female screw are provided in the support plate of the reflector support tool. Alternatively, a screw hole and an arc-shaped groove may be provided in the support plate of the reflector support tool, and an insertion hole and a female screw may be provided in the elevation angle adjustment portion of the adjustment tool. The parabolic antenna according to the embodiment of the present invention described above, unlike conventional parabolic antennas, does not require a rotation mechanism for the pole, so the shape of the pole to which the parabolic antenna according to the embodiment of the present invention is attached is not limited to a circular pole and can be a rectangular pole. [Explanation of symbols]

[0026] 1 Parabolic antenna, 10 Reflector, 11 Reflector support, 11a Arm insertion portion, 11b Support plate, 11c Insertion hole, 11d Female screw, 11e Holding piece, 11f Step, 12 Arm, 12a Insertion portion, 12b Extension piece, 12c Engagement protrusion, 13 Primary radiator, 14 Adjustment tool, 14a Third screw, 14b Fourth screw, 15 Fixing tool, 15a T-shaped main body, 15b Insertion hole, 15c Mounting portion, 15d Mounting long hole, 15e Insertion hole, 15f Recess, 16a First screw, 16b Second screw, 21 Elevation angle adjustment portion, 21a Screw hole, 21b Arc-shaped groove portion, 21c Nut, 22 Azimuth angle adjustment portion, 22a Female screw, 30 Pole, 31a, 31b Pole mounting bracket, 32 Mounting bolt, 100 Parabolic antenna, 110 Reflector, 111 Arm, 112 Volts, 112 Primary radiator, 121, 122 Antenna mounting bracket, 123 Volts, 130 Pole, 131 Pole fixing bracket, 132 Volts

Claims

1. A parabolic reflector that reflects radio waves and has a reflector support on its back surface; an arm having one end provided with a primary radiator and the other end removably attached to the reflector support; a primary radiator provided at one end of the arm and disposed at a focal position of the parabolic reflector for receiving radio waves reflected by the parabolic reflector; an adjustment tool including a cylindrical azimuth angle adjustment portion and a flat elevation angle adjustment portion formed so as to protrude from an outer circumferential surface of the azimuth angle adjustment portion; A pair of fasteners that can be fastened to a mounting body and that rotatably support an upper portion and a lower portion of the azimuth angle adjustment unit; Equipped with a flat support plate protruding rearward is formed on the reflector support device, the elevation angle adjustment unit is arranged opposite to the support plate, and the support plate is rotatably supported relative to the elevation angle adjustment unit, making the elevation angle of the parabolic reflector adjustable; and the azimuth angle of the parabolic reflector can be adjusted by rotating the azimuth angle adjustment unit relative to the pair of fasteners.

2. the pair of fasteners are formed with a first insertion hole having a circular cross section, one surface of which is closed by a closed surface, and a first insertion hole formed in a center of the closed surface; the azimuth angle adjustment portion is formed with a first female thread in a center of an upper end surface and a lower end surface, respectively; a first screw inserted into the first insertion hole of one fastener of the pair of fasteners is screwed into the first female thread formed in the upper end surface; and a second screw inserted into the first insertion hole of the other fastener of the pair of fasteners is screwed into the first female thread formed in the lower end surface; 2. The parabolic antenna according to claim 1, wherein said first screw and said second screw are provided with knobs that can be tightened by hand.

3. a screw hole and an arc-shaped groove portion are formed in the elevation angle adjustment portion, a second insertion hole and a second female screw are formed in the support plate, a third screw inserted into the arc-shaped groove portion is screwed into the second female screw, and a fourth screw inserted into the second insertion hole is screwed into the screw hole, 2. The parabolic antenna according to claim 1, wherein said third screw and said fourth screw are provided with knobs that can be tightened by hand.

4. The parabolic antenna according to claim 2, characterized in that the pair of fasteners comprises a T-shaped main body formed in a T shape, the T-shaped main body being composed of a central portion in which the insertion hole is formed and a pair of mounting portions extending to both sides from the central portion and capable of being fixed to a mounting body.

5. 5. The parabolic antenna according to claim 4, wherein a recess capable of coming into contact with a pole is formed in the center of the pair of mounting parts.

6. 6. The parabolic antenna according to claim 1, wherein a reflector support provided on the rear surface of said parabolic reflector is integrally formed with said parabolic reflector.

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