JPS59174002A - Parabolic antenna - Google Patents

Abstract

PURPOSE:To reduce the overall weight with a simple support structure and at the same time to prevent the deterioration of electrical characteristics under the wind pressure for a parabolic antenna, by using a thin and lightweight reflector and also forming a swelled part on the back of the reflector. CONSTITUTION:A thick part 7 is formed at the fringe area on the back of a reflector 5 for reinforcement. This part 7 is unified with a main body 7a and swelled on the back of the reflector. A thick part 8 is formed in the same way as the part 7 in a body with the main body 5a and at the middle part between the center and the fringe of the reflector. This part 8 has 20-10mm. width W and about 7mm. height H. Ribs 9 are arranged radially in a body with the main body 5a and swelled on the back of the reflector. The number of ribs 9 and the spaces between them are decided so as to prevent the distortion of the reflector owing to the wind as well as the strains which are produced in a cooling process after a molding process. Ribs 10 are formed in the same way as ribs 9 and have screw holes 12 at the center of each rib 10.

Description

[Detailed description of the invention] This invention relates to a parabolic antenna.

In the case of conventional parabolic antennas, the wall thickness is increased to create a durable structure. However, increasing the wall thickness increases weight, and the problem is that it becomes difficult to construct the support. Therefore, when attempting to manufacture a lighter parabolic antenna by reducing the wall thickness, a problem arose in which uneven distortion occurred on the reflecting surface, deteriorating the ni and air characteristics.

Therefore, the present invention aims to provide a parabolic antenna in which the above-mentioned problems are solved by making the reflector light and bulky and by forming a bulge on the back surface.

The drawings showing the embodiments of the present application will be described below.

The antenna device shown in FIGS. 1 to 7 includes an antenna A, a parabolic antenna B, and a fixed body AK.
It consists of a fixture C for attaching the jm.

In the fixed body A above, ■ is a column, and 2 is a mounting base attached to the lower end of column 1, which is used to identify it to a foundation or building set on the ground, and to pass a screw rod for fixing. A through hole 2a is provided. 3 shows a well-known reinforcing piece.

Next, the parabolic antenna B will be explained.

This parabolic antenna B has a configuration called an offset parabolic antenna. Reference numeral 5 denotes a reflecting mirror, which is formed by casting aluminum, that is, by pouring aluminum into a mold.

This reflecting mirror 5 can be made by molding aluminum by die-casting, or by molding plastic abrasive material by ordinary molding means (molding using a mold).
It may be formed by applying a known radio wave reflecting material (for example, a conductive paint) to the surface (the side that appears in the figure). In this document, items formed by the various methods described above are also referred to as castings. 5a indicates the main body and the thickness T
For example, about 4 gates are formed. 6 indicates a reflective mirror surface;
The area is large enough to receive 100 radio waves from broadcasting satellites. On the back surface of the reflecting mirror 5, reference numeral 7 denotes a thick portion formed on the periphery (for reinforcement), which is integral with the main body 5a and formed in a bulging shape on the back surface. 8 is the main body 5a
It is an inner thick part integrally formed with the inner part, and is formed in the same manner as the above-mentioned part 6 between the peripheral edge and the center part. Note that the radius W is formed to be, for example, about 20 mm to about 10 mm, and the height (2) is formed to be about 7 mm. 8a indicates the axis of the inner thick portion 8. 9.9... are rigs arranged radially, each still integral with the main camp 5a and formed in a bulge shape on the back (the crystallinity is, for example, about 7 m+'h). . The number and arrangement interval of these ribs 9 are determined by the wind reflecting mirror 5.
It is possible to effectively prevent distortion of the reflector 5, and the reflector 5 is determined to have a predetermined size without being distorted during the cooling process after molding during manufacturing of the reflector 50. 10,
10... is a rib, the meat in the middle part ~ 1jl of part 8
:i is formed in the same way as 1'1iJ lip 9. Reference numerals 11, 11, . . . designate upper mounting seats (also referred to as upper mounting points), which are integral with the main body 5a and formed in a bulging shape, each having a screw hole ν bored in its center. The diameter thereof is, for example, approximately 30 mm. Reference numeral 13 denotes a support arm upper part provided at a lower position on the back surface of the reflector 5, and the screw hole 1
4 is drilled. The mountain L5 indicates the positioning piece. 1
Reference numeral 6 denotes a retaining rod upper mounting portion, which is integrally formed with the main body 5a and is formed in a bulging shape, and a screw hole 17 is bored in the center of each portion.

Next, ρ is a supporting arm extending 6iJ from the lower part of the reflecting mirror 5, and is formed into a U-shape in cross section. In this support 1bρ, n indicates the base, and by inserting the upper threaded rod n into the through hole bored there, and by screwing the threaded rod stomach into the screw hole 14, It is fixed at l1i11. In addition, if it is fixed, the left and right position l
The position of the base wing is determined by i&clip 15.15.
, the above-mentioned installation can be done easily. The force indicates the take-out part, and the bureau indicates the support part.

Note that the support 11 is formed by forming 7" of aluminum or steel plate.Next, J, 30 indicates a horizontal support, and is made of a material strong against tension or compression, such as a steel rod or the like. It is formed from a metal A-phase material such as an aluminum chisel rod.In the above-mentioned horizontal support fixture, 31 is a top-mounted piece formed at one end, and a top-mounted threaded rod is inserted into the hole drilled there. The viscosity of the upper mounting part IG is established by inserting the threaded rod into the screw hole 17 in the upper mounting part 16. 34 is a plate formed at the end of the external force. Figure 1 shows a top piece with a shape of 1, which is fixed to the support part with a screw rod.Next, part A shows a wave receiving device attached to the support part.This wave receiving device is well known It consists of a primary radiation signal 39 (a horn is used), a converter d, etc. Inside the converter d, there is a built-in converter circuit that converts microwave radio waves into UHF (or VHF) signals. It is.

Next, the fixture C will be explained. This fixture C is composed of a support body 46, a fixture 61, and various members for connecting them. First, in the support 46,
Reference numeral 7 denotes a base body, which is formed into a cylindrical shape, and its inner diameter is formed to a size that allows it to be covered and attached to the above-mentioned support column 1. Reference numeral 48 denotes a nut fixed to the base 47, and 49 denotes a fixing device screwed onto the nut 48. The screw rod is used to press the outer surface of the column 1 by advancing the screwing into the nut. , the base body 47 is fixed to the support column.

The force indicates the first support fixed to the base body 47. This first
In the support body, reference numeral 51 denotes a base plate, which is fixed to the upper end of the base body 47 by welding means, and its fixed state is bolted by reinforcing pieces 52. One edict is two parts of the board 51.
The figure shows upright pieces formed by standing up from the ground, and a through hole is bored in the center of each piece. The base plate 51 and the vertical lever are integrally formed by frame-molding a metal plate (for example, a steel plate).
A support is shown. In line with this second support, reference numeral 57 is a lifting piece which is fixed to the base body 47 by means of contact means, and its fixed state is reinforced by a reinforcing piece 57a. The blade is a rod fixed to the protruding end of the protruding piece 57 by welding means, and screw holes are extensively bored at both ends.

Next, the mounting body 61 will be explained. This mounting body 61
A pair is provided on the left and right, and they are integrally connected to each other by a connecting shaft. The mounting body 61 and the connecting piece area are joined by welding means. Above mounting body 6
1 is an upper mounting body corresponding to the first support W, and a second
and a lower mount corresponding to the support body. In this example, the upper mounting body t and the lower mounting body t are formed of one material, but they may be formed of separate materials and then integrally connected to each other. Reference numeral 65 denotes a pivot hole for the lower mounting body, which is bored at a position 1d corresponding to the screw hole. The mallet is an adjustment groove formed in the upper mounting body, and is formed in an arc shape centered on the pivot hole and having a radius equal to the distance between the screw hole bar and the through hole. 67 is the mounting body 61
A receiving piece that is formed integrally with (bent by pressing means) and has a plurality of upper holes.

The reflective mirror is attached thereto by screwing the stopper threaded rod ω into the screw hole IZK in the reflective mirror 5 through the upper hole. Note that τ is a reinforcing piece fixed to both the mounting body 61 and the receiving piece q by r8M means. n is a pivot shaft, for example a threaded rod, which is threaded through the pivot hole 6 into the threaded hole blade. Note that η, 73 indicates the well-known Hirayanya and Suguringuwasha.

Next, 74 indicates a first stopper. In this case, the main body 75 is formed into a rod shape, and screw holes 76 are bored at both ends thereof. In addition, the central part intersects the axis of the main body 75 (
A screw hole 77 is drilled in the direction K (intersecting). A threaded rod is illustrated as a fastener, and is screwed into the screw hole 76 through the adjustment T+16 and the through hole. 79 and 80 indicate well-known flat washers and sling washers. Next 81
indicates a rod with two stone stops. 2, the 82 rt main body is formed into a rod shape, and a guide piece 83 with a radius and height that fits into the adjustment groove ω is provided at both ends, and furthermore, in the center thereof, The screw holes are useful. Also, the main body 82
A through hole 85 is bored in the center of the main body in a direction intersecting (orthogonal to) the axis of the main body. Reference numeral 86 indicates a threaded rod exemplified as a fastener, which is screwed into the thread legend through adjustment g and groove ω. 87 and 88 indicate well-known flat washers and spring washers. Next, reference numeral 91 is an adjustment rod, for example, a well-known bolt is used. In this figure, 92 is the head, and 93 is the insertion part, which is rotatably passed through the healing hole.

The bond is A-adjusted threaded part, and the screw hole ZNCNC is included.

Reference numeral 95 denotes a retaining body, which is screwed into the A-adjusting screw portion 94 and advanced toward the first direction of the insertion portion 93, so that the locking body 93 (
The adjustment rod 91 is fixed to the adjustment rod 91 by reaching the boundary between the non-threaded part) and the threaded portion 94, and the adjustment rod 91 is integrated in the axial direction of the adjustment rod 91 with respect to the main body 821C where the adjustment rod 91 is located. Adjustment rod 9 relative to the main body 82
1 is designed to be able to rotate freely. Note that this configuration may be any known structure that achieves the above objectives. 9
6 indicates a knob attached to the end of the adjusting screw rod.

Next, a method of using the antenna device having the above configuration will be explained. First, in order to fully adjust the azimuth angle of the parabolic antenna B, the fixed troop is loosened and the stop 47 is rotated in any direction with respect to the support l. Then, when the antenna B is oriented in the m-direction, the fixing member 49 is tightened at that position to fix the base body 47 to the support column IK.

Next, the elevation angle adjustment of antenna B is performed at the next crest.

(1) Slightly loosen adjustment pivot shaft n, and
The women of the people of ff81, 86, are compassionately loosened.

In this state, the mounting body 1 is tilted around the pivot axis n,
Once antenna B has reached almost the desired elevation angle, the above pivot @
n, tightening parts 78 and 86 are provided extensively.

In addition, when tilting the mounting body 61 as described above, the antenna B
If you hold the peripheral edge of the reflecting mirror 50 with your hand and perform the above-mentioned tilting motion, you can easily perform the tilting motion.

(2) Enemy adjustment In this case, slightly loosen the pivot shaft n and also slightly loosen the rice attachment tool 78 of the first stopper leaf 74. In this state, the adjustment rod 91 is rotated in an arbitrary direction (for example, counterclockwise) via the alignment member 96. Then, as shown in FIGS. 6 and 7, since the adjusting screw portion 94 is screwed into the screw hole n, the adjusting screw rod 91 moves slightly toward ViA. As a result, the second stop 81 also moves rearward. Due to this movement, this second fixing (-('81) is in a fixed state (a part of the edge between the adjustment grooves is tightened by the main body 82 and the fastener part)) The body 61 tilts backward little by little about the pivot axis n.As a result, the elevation angle of the satellite antenna B increases little by little.If the adjustment rod 91 is rotated in the opposite direction, Instead, the elevation angle of antenna B decreases little by little.Once antenna B has reached the desired elevation angle in this way, the fasteners 78 on the pivot axis n and the first locking rod 74 can be tightened. good.

Next, at the working width 2, radio waves from a broadcasting satellite arrive toward the boundary surface 6 of the reflecting mirror 5. This radio wave is reflected by the back surface 6 and converges towards the primary radiation d:(9) which is applied to the receiver α. When the signal reaches the converter 4), it is converted into UHF (L signal) and output from the output terminal.

When receiving the radio waves using the above-mentioned rice, the receiving hemlock is supported by the support arm ρ, the left and right @holding rods, and the 30-3 wood + $ body, so the above reception is possible. Even if it is sometimes subjected to large wind pressure due to strong winds, the primary radiator (
The position of the receiver can be kept constant, and the above reception can be performed in a stable state.

In the above case, the support arm η, the left and right horizontal position "shame, 30
Since both have a rod configuration, the opposing surface of the primary radiator I on the reflecting mirror 5, that is, the area (
The reflecting mirror 5 can be supported in a state where the area (a region slightly below the physical center of the reflecting mirror 5) is surrounded by the three rods, and the opposing 1 from f'LVc is It is possible to prevent distortion caused by the pressure of grasshoppers, and therefore the above-mentioned reception of radio waves can be performed even better.

Furthermore, there are three rods on the seagull, namely the supporting arms ρ, the left and right horizontal rods:! Even if D is scary, as it is clear from the figure, they are closer to the lower value of reflector 5 and 6, so the radio waves arriving from the satellite towards reflection '#, 5 are These rods do not obstruct any movement, and therefore the entire visual field of the reflecting mirror 5 can be effectively used for reception, and reception 16 can be performed with a high gain.

Furthermore, when the reflector 5 is attached to the receiving piece a, the upper point ii is provided according to the thick part 8 or the lip 10, and the inner thickness of the upper point 11 is the highest. It is large, and the thick part 8 or lip 10 is difficult to knead, and the main body 5a is the thinnest. For this reason, in the above-mentioned stock condition 2, the cart is superscripted point 11 → meat Junto 8 or lip 10 → main body 5a
The distortion of the boundary surface 6 is extremely small.
The instep is great.

Next, show a j-island ball with different configurations of each part.The above-mentioned pivot axis n
Use the above-mentioned IJ threaded rod <i+) Already replaced,
That I from both ends of the stick association! Turn in the lll1 direction to make the rigid body protrude and insert the shaft body into the pivot hole 65,
Furthermore, a nut with a tightening/loosening mark may be screwed into the portion of the shaft protruding from the pivot hole. Similarly, for the first and second locking rods 74 and 81, insert the shafts attached from their main bodies 75 and 82 into the adjustment 1'1166, and further tighten and loosen the parts protruding from the grooves. Even if it is configured by screwing together nuts that can be freely moved, it is also beautiful. (In addition, the above-mentioned mounting C and antenna B may be replaced with any other well-known structure as long as the antenna B is pivotally connected to the fixed body AK.However, as for the fixed body A, the independent support column 1 has been explained as an example. However, other objects such as walls of buildings may also be used instead of this.In the present specification, these are also collectively referred to as buildings.

Next, FIG. 8 shows a different embodiment of the present application, and shows an example in which the intermediate thick portion and the inner lip have different cross-sectional shapes.

In addition, for parts that are considered to have the same or equivalent composition as those in the previous figure, the letter e is added to the same line number as in the 1JiJ figure and an explanation is given. (Even in the 1st and 3rd editions of the 1st and 3rd editions, one song is missing, and the letters f, g, and h are added in that order, omitting the overused Moe 1 Ming.) Next, Figures 9 and 74 FIG. 10 shows different examples of the superscript points and the position 1 shift of the rig in i1+'i. As shown in FIG. 3 of υ11, the above-mentioned superscript points are arranged on the shaft pusher 8a except for -tA, and all of them are arranged along the axis 8af of the middle thick part 8f as shown in FIG. Even if it is arranged inside the haze, it can also be used as shown in Fig. 310.
They may be arranged inside and outside along the line g.

Next, FIG. 11 shows a different example of the relationship between the horizontal soup top attachment part and the horizontal support. In the figure, reference numeral 98 denotes an auxiliary piece, which is fixed to the top mounting portion 16h by a set screw rod 33h. Further, the base portion of the horizontal support rod 30h is formed straight, and its upper portion 31h is fixed to the auxiliary piece 98 with a bolt 99 and a nut 100.

As described above, in the present invention, the reflective mirror surface 6 is
Naturally, it has the advantage of being able to receive and reflect the waves from the broadcasting rain star and throw them into the primary radiator, as well as the parabolic beam. '6 ii! Even when wind pressure is applied in the state, m1llW has an annular thick part 7, and there is also a thick part 8 in the middle of the sentence, and the presence of these two wall parts 6 prevents distortion of the wide mirror surface 6. It can be prevented.

Therefore, it has the advantage of being able to receive high-quality 1i waves even under relatively strong winds.

Moreover, with this structure, the distortion of the mirror surface can be made with extremely little distortion even when using a manufacturing method that uses casting plastic technology (plastic, die-casting, etc.), making it extremely easy to mass-produce. It has a structural feature that allows the antenna to be made at low cost. In addition, by providing a structure that can be manufactured without distortion during plastic molding, the overall wall thickness of the reflector can be made thinner, making it possible to manufacture lightweight reflectors with high mass productivity. It has excellent features.

[Brief explanation of the drawings] The drawings show the next 71st Nl of this h and H, Fig. 1 is a perspective view of the antenna device α, Fig. 2 is a rear perspective view, and Fig. 3 is a perspective view of the antenna device α. The figure is a rear view of the reflector, and Figure 4 is IY-IV.
Fig. 5 is a sectional view taken along the Y-v line, Fig. 6 is an exploded perspective view of the feeding equipment, Fig. 7 is a vm-viwa rho section, and Fig. 8 is a different side of the actual force. Figure 5, similar to 1, showing
Figures 1 and 10 are partial rear views of the reflector showing different embodiments, and Figure 11 is a 1υ" side view showing different embodiments of the relationship between the upper part of the horizontal support and the horizontal support. 5 ...Reflector, 6...Reflector surface, 7.8...Thick part, 9, 10...Rip, blade...-Enter/radiator. Fig. 4 Fig. 9 Fig. 7 Fig. 11 figure

Claims (1)

[Claims] At the reflection boundary of the parabolic antenna, a thick part is formed in an annular shape at the periphery, and another part 14F is provided between the periphery and the central part in addition to the thick part.
, in a state where the part bulges out to the back side and in a ring shape.
'1IIll of the annular thick part in the middle part.
A superposition point for supporting the antenna is placed on the is or near the axis, and a sub-point between the thick part on the outer circumferential side and a part of the inner JZ in the middle part is attached. In the above, a thick lip of the number of hooks is formed in the radial direction, and in the annular thick part (fil) in the above-mentioned middle part 114j, a thick lip of the number of hooks is formed. Hunt for things f&
parabolic antenna.