JP2009253664A - Reflector antenna - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact fastening structure made of a resin in which an arm portion is fastened to a reflector. <P>SOLUTION: A linking portion formed at the other end of an arm 13j supporting a converter by one end thereof is fitted into an arm fastening portion which is integrated with the reflector. In this case, a shaft portion 13e having a different shape in the linking portion is inserted through an insertion hole 12c of the arm fastening portion to be fitted into a circular hole portion. The arm 13j rotates around the shaft portion 13e as a center of rotation, and a holding plate 13h of the linking portion holds a fitting frame portion 12b. Also, the width of the fitting frame portion 12b is narrower than the width of an extending portion 12a, and a step portion is formed therebetween. The upper edges of a sandwiching plate which serves as a both-side plate of the linking portion is engaged with the step portion. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a reflector antenna including a reflector for receiving satellite broadcast such as BS broadcast and CS broadcast.

  A parabolic antenna is generally used as an antenna for receiving satellite broadcasting such as BS broadcasting or CS broadcasting. The parabolic antenna includes a parabolic reflector and a converter having a horn that receives the radio waves reflected and focused by the parabolic reflector. The horn of the converter is disposed at the focal position of the parabolic reflector, and the converter is generally fixed to the tip of an arm fixed to the parabolic reflector. The extension direction of the arm that supports the converter at the focal point of the parabolic reflector is substantially perpendicular to the opening surface of the parabolic reflector because of its character, so the packing posture when transporting the parabolic antenna is large. Become. As a conventional reflector antenna for solving this problem, a reflector antenna made of an offset parabolic antenna and a reflector antenna having a small packing posture when transporting the arm so that the arm can be detached from the reflector are known.

  FIG. 30 is a side view showing an example of the configuration of a conventional reflector antenna. A parabolic antenna 100 shown in FIG. 30 is an offset parabolic antenna, and includes a reflecting mirror 110, an arm portion 113, and a converter 114. Converter 114 is fixed to the tip of arm portion 113, and the end of arm portion 113 is fixed to reflecting mirror mounting portion 111 provided on the back surface of reflecting mirror 110. By fixing the end portion of the arm portion 113 to the reflector mounting portion 111, the horn in the converter 114 is positioned at the focal position of the reflector 110. The reflecting mirror mounting portion 111 is a mounting portion for mounting the parabolic antenna 100 to the mast 50, and is provided with a mounting bracket for mounting to the mast 50. Further, after the parabolic antenna 100 is attached to the mast 50, the elevation angle when the reflecting mirror 110 is directed toward the satellite that receives the reflecting mirror 110 can be adjusted by the reflecting mirror attaching portion 111.

  FIG. 31 is an enlarged perspective view showing the configuration of the reflector mounting portion 111. As shown in FIG. 31 includes a support fitting 115 and a fixing fitting 120 that is fixed to the support fitting 115 so as to be rotatable within a predetermined rotation range. The support bracket 115 has a U-shaped cross section, and includes a main body portion 115a having a substantially rectangular shape formed by protruding mounting legs 115d bent from four corners. Side plates 115b are provided on both sides of the main body portion 115a. Each is formed by bending. A screw is inserted into the mounting leg 115 d and the screw is screwed onto the back surface of the reflecting mirror 110, whereby the reflecting mirror mounting portion 111 is fixed to the reflecting mirror 110. At the center of the main body 115a, the end of the arm 113 is fixed with two screws. In this case, a holding piece for holding the side surface of the arm portion 113 is cut and raised from the main body portion 115a.

  The fixing bracket 120 is formed in a U-shaped cross section, and includes a substantially rectangular main body portion 120a and side plates 120c formed by being bent on both sides of the main body portion 120a. The side plate 120c of the fixing bracket 120 is sandwiched between the both side plates 115b of the support bracket 115, and the side plates are fixed to each other by a bolt 116 and a bolt 117, respectively. In this case, when the bolt 117 inserted into the arc-shaped elongated hole 115 c formed in the side plate 115 b is screwed to the side plate 120 c of the fixing bracket 120, and the support bracket 115 is rotated with respect to the fixing bracket 120. The bolt 117 slides in the arc-shaped elongated hole 115c. Since the support bracket 115 is fixed to the reflecting mirror 110, the elevation angle of the reflecting mirror 110 can be adjusted to a predetermined elevation angle by rotating the fixing bracket 120. After the adjustment, the bolt 116 and the bolt 117 are fastened.

  In addition, a holding metal fitting 121 is attached to the main body portion 120a of the fixing metal fitting 120 by a pair of bolts 122 so that the mast 50 can be held between the holding metal fitting 121 and the main body portion 120a. A state in which the fixing bracket 120 is attached to the mast 50 is shown in FIG. A bent stopper fitting 120b is fixed to the upper portion of the main body 120a with screws, and the upper surface of the mast 50 is in contact with the lower face of the stopper fitting 120b. As described above, the reflecting mirror mounting portion 111 can be mounted on the upper portion of the mast 50. In addition, a long hole 121a into which the bolt 122 is inserted is formed on one side of the holding metal 121, and the bolt 122 is fixed by moving the holding metal 121 so that the bolt 122 slides in the long hole 121a. The mast 50 can be held by the holding fitting 121 without being detached from the 120. The pair of bolts 122 are fastened to the main body 120a after adjusting the azimuth angle of the reflecting mirror 110 by rotating the reflecting mirror mounting portion 111 with respect to the mast 50. In addition, when attaching the reflector attachment part 111 in the middle of the mast 50, the stopper metal fitting 120b is removed from the main-body part 120a.

  Next, FIG. 33 shows a side view showing another example of the configuration of the conventional reflector antenna. A parabolic antenna 200 shown in FIG. 33 is an offset parabolic antenna, and includes a reflecting mirror 210, an arm unit 213, and a converter 214. Converter 214 is fixed to the tip of arm portion 213, and connecting portion 215 is formed at the end of arm portion 113. The connecting portion 215 is detachably fitted to the arm fixing portion 212. An arm fixing portion 212 is formed at the distal end portion of the extending portion that extends from the reflecting mirror mounting portion 211 provided on the back surface of the reflecting mirror 210 to a portion positioned outward from the outer peripheral edge of the reflecting mirror 210. When the connecting portion 215 at the end of the arm portion 213 is fixed to the arm fixing portion 212, the horn in the converter 214 is positioned at the focal position of the reflecting mirror 210. The reflecting mirror attaching portion 211 is an attaching portion for attaching the parabolic antenna 200 to the mast 50, and includes an attachment fitting for attaching to the mast 50. Further, after the parabolic antenna 200 is attached to the mast 50, the elevation angle when the reflecting mirror 210 is directed toward the satellite to receive it can be adjusted by the reflecting mirror attaching portion 211.

  FIG. 34 is an enlarged perspective view showing the configuration of the connecting portion 215 and the arm fixing portion 212. As shown in FIG. In the connecting portion 215 shown in FIG. 34, a stopper face plate 215d is formed in a plane substantially perpendicular to the long axis of the arm portion, and a pair of elastic members projecting from the center to the front are formed on the front face of the stopper face plate 215d. A combination piece 215a and a pair of rail pieces 215b composed of two rails are formed outside the elastic engagement piece 215a. A bottom plate 215c having an elongated plate shape and a flat upper surface is formed below the pair of rail pieces 215b. The elastic engagement piece 215a is formed in a long and narrow plate shape, and a wedge-shaped engagement piece whose width decreases toward the outer surface is formed. The distance between the pair of elastic engagement pieces 215a gradually increases as the distance increases. ing. The arm fixing portion 212 includes a pair of plate-like engagement pieces 212a extending downward, and a pair of guide portions 212b in which two groove portions 212c are formed on both sides of the engagement pieces 212a. . Further, holders 212d for holding the cables are formed on the outer surface of the guide portion 212b.

FIG. 35 is an enlarged perspective view showing a configuration in a state where the connecting portion 215 having such a configuration is fitted to the arm fixing portion 212. FIG. When the elastic engagement piece 215a of the connecting portion 215 is inserted between the arm fixing portions 212, the pair of rail pieces 215b are guided and entered into the groove portions 212c of the guide portions 212b, respectively. As shown in FIG. 35, the wedge-shaped portion formed at the front portion of the elastic engagement piece 215a engages with the rear side surface of the engagement piece 212a. At this time, the upper surface of the bottom plate 215c supports the lower surface of the guide portion 212b. Thereby, the arm part 213 in which the connection part 215 is formed can be attached to the reflecting mirror 210 including the arm fixing part 212. In the state shown in FIG. 35, the engagement between the engagement piece 212a and the elastic engagement piece 215a is performed by placing a finger on both sides of the elastic engagement piece 215a and applying a force so that the interval between the elastic engagement pieces 215a is reduced. Is released, and the connecting portion 215 can be removed from the arm fixing portion 212. As described above, the arm portion 213 can be detachably attached to the reflecting mirror 210.
Japanese Patent No. 3258939

  In an example of a conventional reflecting mirror antenna, the reflecting mirror mounting portion 111 has four heads fixed to the reflecting mirror 110 with hexagonal bolts, and the arm portion 113 also has two heads on the reflecting mirror mounting portion 111. The part is fixed with hexagonal bolts. For this reason, since the hexagon wrench and the spanner are needed when adhering the reflecting mirror attaching part 111 and the arm part 113, when these tools are not held together, it cannot attach. In addition, even when the tool is held, when attaching the arm part 113, the tool must be inserted into a narrow space in the reflector mounting part 111 and the fastening work must be performed, which makes the fixing work difficult. there were. Further, in another example of the conventional reflector antenna, the arm portion 213 can be fixed to the reflector 210 without using a bolt, but a heavy converter including a metal casing is used as the arm portion 113. Therefore, a large stress is applied to the fixing structure composed of the resin connecting portion 215 and the resin arm fixing portion 212. For this reason, there has been a problem that the fixing structure between the connecting portion 215 and the arm fixing portion 212 must be enlarged to increase the strength so that the fixing structure between the connecting portion 213 and the arm fixing portion 212 does not loosen.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a reflector antenna in which a structure for fixing an arm portion to a reflecting mirror can be a compact resin fixing structure.

  In order to achieve the above object, the present invention includes a holding part that holds both sides of an arm fixing part, a holding plate that is provided from the bottom part to the rear part of the holding part, and a shaft part that has an irregular cross-sectional shape. The coupling portion formed with the shaft portion is sandwiched between the insertion hole into which the shaft portion is inserted, the hole portion formed at the end portion of the insertion hole and the shaft portion is rotatable, and the sandwiching portion, and is inserted into the insertion hole. The main feature is that when the shaft portion inserted into the hole portion is rotated, it is attached to the arm fixing portion formed with the fitting frame portion held by the holding plate.

  In the present invention, the shaft portion inserted into the hole portion serves as a fulcrum, and the holding plate for holding the fitting frame portion serves as an action point to reliably support the weight of the converter attached to the tip of the arm. Thus, the weight of the converter can be sufficiently supported even with a compact structure.

FIG. 1 is a side view showing the configuration of a parabolic antenna 1 that is an embodiment of a reflector antenna according to the present invention.
A parabolic antenna 1 according to an embodiment of the present invention shown in FIG. 1 is an offset parabolic antenna, and includes a resin-made reflecting mirror 10, a resin-made arm portion 13, and a converter 14. The converter 14 is fixed to the tip of the arm portion 13, and a connecting portion 13 a is formed at the end of the arm portion 13. The parabolic antenna 1 is assembled by fitting the connecting portion 13 a to the arm fixing portion 12 as shown by the arrows, and the connecting portion 13 a is detachable from the arm fixing portion 12. A reflecting mirror mounting portion 11 is provided on the back surface of the reflecting mirror 10, and an arm is attached to the distal end portion of the extending portion that extends from the reflecting mirror mounting portion 11 to a portion positioned outward from the outer peripheral edge of the reflecting mirror 10. The fixing part 12 is formed. When the connecting portion 13 a at the end of the arm portion 13 is fixed to the arm fixing portion 12, the horn in the converter 14 is positioned at the focal position of the reflecting mirror 10. The reflector mounting part 11 is an attaching part for attaching the parabolic antenna 1 to the mast 50, and is provided with an attachment fitting for attaching to the mast 50. In addition, after the parabolic antenna 1 is attached to the mast 50, the azimuth angle and elevation angle when the reflector 10 is directed toward the satellite that receives the reflector 10 can be adjusted in the reflector attachment portion 11.

Here, the configuration of the reflecting mirror 10 is shown in FIGS. 2 is a front view showing the configuration of the reflecting mirror 10, FIG. 3 is a side view showing the configuration of the reflecting mirror 10, and FIG. 4 is a side view showing the configuration of the reflecting mirror 10 in a sectional view.
As shown in these figures, the resin-made reflecting mirror 10 includes a concave parabolic reflecting surface for focusing radio waves from a satellite on the horn of a converter 14, a support portion 15 and an extending portion 12a and an arm formed integrally on the back surface. And a fixed portion 12. The parabolic reflecting surface is a vertically long parabolic reflecting surface for an offset parabola. The support portion 15 is configured on the reflecting mirror 10 side in the reflecting mirror mounting portion 11, and an insertion hole 15 b into which a pivot bolt described later is inserted is formed in the upper portion, and an arc-shaped elongated hole 15 a is formed in a portion protruding to the back side. Is formed. A scale 15c indicating the angle of elevation is attached below the arcuate slot 15a. As will be described later, the support portion 15 is clamped by the fixing metal fitting 20 constituting the reflector mounting portion 11, a pivot bolt screwed into the fixing metal fitting 20 is inserted into the insertion hole 15b, and the arc-shaped elongated hole 15a is inserted into the arc-shaped elongated hole 15a. An adjustment bolt that is screwed onto the fixing bracket 20 is inserted. When the reflecting mirror 10 is adjusted to a predetermined elevation angle, the adjustment bolt and the pivot bolt are fastened. Further, the angle of elevation of the reflecting mirror 10 is indicated by the scale 15c during the adjustment. The fixing metal fitting 20 includes a holding metal fitting for holding the mast 50 therebetween. With this structure, the reflecting mirror 10 including the reflecting mirror mounting portion 11 can be fixed to the mast 50. When fixing, the clamp is fixed after adjusting the azimuth angle of the reflecting mirror 10. Furthermore, the arm fixing portion 12 is formed at the distal end portion of the extending portion 12 a extending from the reflecting mirror mounting portion 11 to a portion located outward from the outer peripheral edge of the reflecting mirror 10. The arm fixing portion 12 includes a fitting frame portion 12b having a substantially rectangular parallelepiped shape whose front surface is opened, and insertion holes 12c having a predetermined length opened forward are formed on both side surfaces thereof. A hole portion 12g having a substantially circular shape is formed at the end portion. A reinforcing piece is integrally formed inside the extending portion 12a and the support portion 15 as shown in FIG.

Next, the structure of the arm fixing portion 12 at the tip of the extending portion 12a formed integrally with the reflecting mirror 10 is shown in FIGS. 5 is a bottom view showing the configuration of the arm fixing portion 12, FIG. 6 is a front view showing the configuration of the arm fixing portion 12, and FIG. 7 is a side view showing the configuration of the arm fixing portion 12. FIG. 4 is a rear view showing the configuration of the arm fixing portion 12.
As shown in these drawings, the arm fixing portion 12 formed at the tip of the extending portion 12a has upper and lower surfaces and both sides of a substantially rectangular parallelepiped shape having a front surface that is formed slightly narrower than the width of the extending portion 12a. The fitting frame part 12b which consists of a surface and a back surface is provided. Insertion holes 12c having a predetermined width are formed on both side plates of the fitting frame portion 12b, and a substantially circular hole portion 12g is formed at the end of the insertion hole 12c. A punching hole 12j is formed in the upper and lower sides and the rear side surrounding the hole portion 12g. The hole 12j gives elasticity to the hole 12g, and when the shaft part formed in the connecting part 13a of the arm part 13 to be described later is fitted into the hole part 12g, the hole part 12g makes the shaft part elastic. Come to support. The inside of the fitting frame portion 12b is a hollow portion 12e, and the shaft portion is accommodated in the hollow portion 12e.

  Further, reinforcing pieces 12f are formed in a bracing manner inside the extending portion 12a, and a stepped portion 12i is formed at the boundary between the extending portion 12a and the arm fixing portion 12. The step portion 12i is formed such that the front portion is horizontal and the rear portion is inclined downward, and the height of the rear portion of the fitting frame portion 12b gradually decreases. Furthermore, an L-shaped cable holder 12d is formed on the left side of the boundary portion toward the extending portion 12a. The cable holder 12 d is a holder that holds the coaxial cable led out from the converter 14. Further, the engagement plate 12h is formed on both sides by projecting the side plate of the fitting frame portion 12b to the rear, and the engagement piece 12h is formed in a wedge shape whose width becomes narrower as it goes down, and the upper surface is flat. It is said that.

Next, the structure of the arm part 13 is shown in FIGS. 9 is a side view showing the configuration of the arm unit 13, FIG. 10 is a plan view showing the configuration of the arm unit 13, FIG. 11 is a rear view showing the configuration of the arm unit 13, and FIG. It is a side view which shows the structure of 13 with sectional drawing.
As shown in these drawings, the converter 14 is supported by the tip of the arm 13. The converter 14 has a metal horn 14c and a metal casing 14b as shown in FIG. 12, and a converter circuit for converting the frequency of the received satellite broadcast signal into an intermediate frequency is provided in the casing 14b. It has been incorporated. This intermediate frequency received signal is output from an output terminal 14a which is a coaxial plug provided in the casing 14b. The arm portion 13 is made of resin and has an arm 13j bent in an arc shape and a connecting portion 13a formed at an end of the arm 13j. A reinforcing piece is formed inside the arm 13j.

  The connecting portion 13a includes a sandwiching portion 13b formed by extending both side surfaces of the arm 13j, a shaft portion 13e formed on the slightly upper side of the front portion in the sandwiching portion 13b, and a rear portion side. It is comprised from the holding plate 13h of the L-shaped cross section formed of the lower surface and the substantially lower half of the back surface. The upper surface of the connecting portion 13a, the upper half of the back surface, and the front half of the lower surface are opened. The shaft portion 13e has an irregular cross-sectional shape in which the upper surface and the lower surface of the round bar are cut out substantially in parallel, and the shaft portion 13e is inclined so that the upper surface and the lower surface are obliquely upward with respect to the horizontal surface of the sandwiching portion 13b. Is formed. A slit 13f is formed almost entirely in the center of the shaft portion 13e in a substantially vertical direction. Further, a locking piece 13c protruding in a wedge shape is formed at the rear part of each clamping portion 13b, and the locking piece 13c is formed in a wedge shape that becomes narrower as it goes upward, and a lower edge of the locking piece 13c. A projection 13d that protrudes in a hemispherical shape is formed inside each of the projections 13d. Further, a groove portion 13g is formed between the holding portion 13b except for the front portion of the holding plate 13h.

Next, an attachment method for attaching the connecting portion 13a of the arm portion 13 configured as described above to the arm fixing portion 12 will be described with reference to FIGS.
13 to 16 show a state in which the connecting portion 13a is aligned with the arm fixing portion 12, FIG. 13 is a side view showing the aligned state, and FIG. 14 is a sectional view showing the aligned state. 15 is a side view, FIG. 15 is a rear view showing the aligned state, and FIG. 16 is a perspective view showing the aligned state. As shown in these drawings, when the connecting portion 13a is positioned in front of the arm fixing portion 12, the arm portion 13 is inclined so that the upper surface and the lower surface of the shaft portion 13e are substantially horizontal, and the shaft portion 13e is The arm fixing portion 12 is positioned at a position where it can be inserted into the insertion hole 12c. In this case, a hollow arrow is formed on the outer surface of the sandwiching portion 13b as shown in FIG. 13, and the arm portion 13 is inclined so that the arrow is horizontal, and the position of the arrow is set to the position of the insertion hole 12c. By aligning, it can be aligned.

  17 and 18 show a state in which the shaft portion 13e is being inserted into the insertion hole 12c of the arm fixing portion 12, FIG. 17 is a side view showing the state in which the shaft portion 13 is being inserted, and FIG. It is a side view which shows a state with sectional drawing. As shown in these drawings, the width of the flat upper surface and lower surface of the deformed shaft portion 13e substantially matches the width of the insertion hole 12c from the upper edge to the lower edge, and is formed on the outer surface of the clamping portion 13b. When the connecting portion 13a is moved in the direction of the arrow, the shaft portion 13e slides in the insertion hole 12c and is inserted toward the hole portion 12g. At this time, the shaft portion 13e is inserted into the insertion hole 12c while the both side surfaces of the fitting frame portion 12b of the arm fixing portion 12 are clamped by the clamping portion 13b of the connecting portion 13a.

  19 to 21 show a state in which the shaft portion 13e is inserted into the hole 12g of the arm fixing portion 12, and FIG. 19 is a side view showing a state in which the shaft portion 13e is inserted into the hole 12g. 20 is a side view showing a state where the shaft portion 13e is inserted into the hole portion 12g, and FIG. 21 is a perspective view showing a state where the shaft portion 13e is inserted into the hole portion 12g. As shown in these drawings, a deformed shaft portion 13e is fitted in the substantially circular hole portion 12g. The outer diameter of the shaft portion 13e is slightly larger than the inner diameter of the hole portion 12g. Further, both side surfaces of the fitting frame portion 12b of the arm fixing portion 12 are held by the holding portion 13b of the connecting portion 13a, and the holding plate 13h is positioned below the fitting frame portion 12b.

  22 to 25 show a state in which the connecting portion 13a is fitted to the arm fixing portion 12, FIG. 22 is a side view showing the fitted state, and FIG. 23 is a sectional view showing the fitted state. FIG. 24 is a side view, FIG. 24 is a rear view showing the fitted state, and FIG. 25 is a perspective view showing the fitted state. As shown in these drawings, when the arm portion 13 is rotated counterclockwise from the state shown in FIGS. 19 to 21, the arm 13j and the connecting portion 13a are rotated counterclockwise around the shaft portion 13e. It moves. At this time, the holding frame 13b is rotated while the side surface of the fitting frame portion 12b is held by the holding portion 13b, and is rotated until the holding plate 13h contacts the lower surface of the rear portion of the fitting frame portion 12b and the lower half of the rear surface. Is done. At this time, the holding plate 13h elastically holds the fitting frame portion 12b by the action of the groove portion 13g, and the protrusion 13d formed on the inner side of the locking piece 13c also rotates. The arm fixing portion 12 is elastically engaged with the upper surface of the engagement piece 12h by the action of the groove portion 13g.

The deformed shaft portion 13e has a substantially circular hole 12g, so that the shaft portion 13e can be rotated in the hole 12g. However, the slit 13f formed in the shaft portion 13e and the hole 12g Due to the action of the hole 12j formed in the periphery, the outer diameter of the shaft portion 13e is slightly compressed, and the inner diameter of the hole portion 12g is slightly expanded, while the shaft portion 13e is elastically rotated in the hole portion 12g. It becomes like this. And the upper edge of the clamping part 13b contacts the step part 12i formed at the boundary part between the fitting frame part 12b and the extending part 12a so that the connecting part 13a is fitted to the arm fixing part 12. Become. In this fitted state, the shaft portion 13e serves as a fulcrum and the holding plate 13h serves as an action point, and the upper edge of the clamping portion 13b also functions as an action point for the stepped portion 12i. For this reason, the weight of the converter 14 attached to the tip of the arm portion 13 can be reliably held by the lever principle, and the fixing structure can stably attach the arm portion 13 to the arm fixing portion 12 without loosening. Will be able to. In this case, since the outer diameter of the shaft portion 13e is slightly larger than the inner diameter of the hole portion 12g, the fixing structure does not rattle due to the action of the slit 13f and the punch hole 12j even if the arm portion 13 can be rotated. .
In the state where the connecting portion 13a is fitted to the arm fixing portion 12, when a force that rotates clockwise is applied to the arm portion 13, the arm 13j and the connecting portion 13a rotate clockwise about the shaft portion 13e. And the arm portion 13 can be detached from the arm fixing portion 12.

  Next, a perspective view showing a detailed configuration of the reflector mounting portion 11 is shown in FIG. As shown in FIG. 26, the reflector mounting portion 11 is attached by a support portion 15 formed integrally with the back surface of the reflector 10 and a pivot bolt 23 and an adjustment bolt 24 so as to sandwich the support portion 15. It is comprised from the fixed metal fitting 20 which is. The fixing bracket 20 is formed by processing a metal plate, the main body 20a has a U-shaped cross section, cut and raised portions 20c are formed on both side surfaces of the main body 20a, and the cut and raised portions 20c are the main body. It is disposed on the same plane as the central plane of 20a. The central part of the main body part 20a is formed with a concave part recessed inward in the vertical direction, and the holding metal fitting 21 is arranged so as to face the central part and the two cut-and-raised parts 20c, and the mast 50 is held between them. Can be fixed. A pair of stoppers 20b are formed on the upper portion of the central portion of the main body 20a. In addition, the central portion of the sandwiching metal 21 is bent into a dogleg shape, and a large number of sawtooth projections that bite into the mast 50 are formed inside thereof. A long hole 21a is formed on one side of the holding metal fitting 21, and one bolt 22 is inserted into the long hole 21a. The bolt 22 is screwed to one cut and raised portion 20c. Further, a groove through which the other bolt 22 is inserted is formed on the other side of the holding metal fitting 21, and the other bolt 22 inserted through the groove is screwed to the other cut and raised portion 20c.

  FIG. 27 shows a state in which the reflecting mirror mounting portion 11 thus configured is mounted on the mast 50. As shown in FIG. 27, the groove formed on the other side of the clamp 21 is detached from the other bolt 22 so that the clamp 21 can be moved freely within the range of the long hole 21a around the one bolt 22. To. Then, the mast 50 is brought into contact with the concave portion at the center of the main body 20a, and then the holding fitting 21 is moved to engage the groove of the holding fitting 21 with the bolt 22. Thereby, the mast 50 is clamped between the concave portion at the center of the main body 20a and the clamp 21, and the upper surface of the mast 50 comes into contact with the lower surface of the stopper 20b. Next, the two bolts 22 are temporarily fixed to the cut-and-raised portion 20c, the reflecting mirror mounting portion 11 is rotated with respect to the mast 50 to adjust the azimuth angle of the reflecting mirror 10, and then the two bolts 22 are finally tightened. To do. Thereby, the reflecting mirror attaching part 11, that is, the reflecting mirror 10 can be attached to the mast 50. Further, the fixing bracket 20 is fixed by a pivot bolt 23 and an adjustment bolt 24. The pivot bolt 23 is inserted into the insertion hole 15b of the support portion 15 configured as shown in FIG. It is inserted through the hole 15a. Thereby, the support part 15 can be rotated with respect to the fixing metal fitting 20 around the pivot bolt 23. With this configuration, the elevation angle of the reflecting mirror 10 can be adjusted, and the adjustment bolt 24 and the pivot bolt 23 are fastened when the reflecting mirror 10 is adjusted to a predetermined elevation angle.

  In the example shown in FIG. 27, the reflector mounting portion 11 is attached to the upper end of the mast 50, but the reflector mounting portion 11 can also be attached in the middle of the mast 50. In this case, as shown in FIG. 28, the pair of stoppers 20b, which are notched pieces, are bent inward so as to be positioned on the surface of the central recess in the main body 20a. Thus, the mast 50 can be protruded upward beyond the stopper 20b without the stopper 20b coming into contact with the upper surface of the mast 50. FIG. 29 shows a state in which the reflecting mirror mounting portion 11 is attached in the middle of the mast 50. As shown in this figure, the middle part of the mast 50 is sandwiched between the central part of the fixing bracket 20 and the sandwiching bracket 21, and the reflecting mirror mounting portion 11, that is, the reflecting mirror 10 is attached to the mast 50 with a predetermined azimuth angle. it can. In addition, the support part 15 can be rotated with respect to the fixing metal fitting 20 with the pivot bolt 23 as a rotation center, and the elevation angle of the reflecting mirror 10 can be adjusted by this configuration.

Since the reflector antenna according to the present invention described above can be removably attached to the arm fixing portion of the reflector, the arm portion can be detached from the reflector and packed. become. Therefore, the packaging posture of the reflector antenna can be reduced, and the transportation efficiency can be improved. Furthermore, since it is possible to select and attach an arm portion to which a converter for receiving a desired satellite broadcast is attached, it is possible to select a desired arm portion without selecting a reflector antenna dedicated to a specific satellite broadcast. It can be shared as a reflector antenna for receiving satellite broadcasts.
In the above description, the reflecting mirror 10 is made of resin. However, the reflecting mirror 10 may be made of light metal such as aluminum. In this case, a resin support portion 15 is bolted to the back surface of the light metal reflecting mirror 10. It should be fixed by, for example.

It is a side view which shows the structure of the parabolic antenna which is the Example of the reflector antenna concerning this invention. It is a front view which shows the structure of the reflective mirror in the parabolic antenna which is an Example of this invention. It is a side view which shows the structure of the reflective mirror in the parabolic antenna which is an Example of this invention. It is a side view which shows the structure of the reflective mirror in the parabolic antenna which is an Example of this invention with sectional drawing. It is a bottom view which shows the structure of the arm fixing | fixed part in the parabolic antenna which is an Example of this invention. It is a front view which shows the structure of the arm fixing | fixed part in the parabolic antenna which is an Example of this invention. It is a side view which shows the structure of the arm fixing | fixed part in the parabolic antenna which is an Example of this invention. It is a rear view which shows the structure of the arm fixing | fixed part in the parabolic antenna which is an Example of this invention. It is a side view which shows the structure of the arm part in the parabolic antenna which is an Example of this invention. It is a top view which shows the structure of the arm part in the parabolic antenna which is an Example of this invention. It is a rear view which shows the structure of the arm part in the parabolic antenna which is an Example of this invention. It is a side view which shows the structure of the arm part in the parabolic antenna which is an Example of this invention with sectional drawing. It is a side view which shows the state which aligned the connection part with the arm fixing | fixed part in the parabolic antenna which is an Example of this invention. It is a side view which shows the state which aligned the connection part with the arm fixing | fixed part in the parabolic antenna which is an Example of this invention with sectional drawing. It is a rear view which shows the state which aligned the connection part with the arm fixing | fixed part in the parabolic antenna which is an Example of this invention. It is a perspective view which shows the state which aligned the connection part with the arm fixing | fixed part in the parabolic antenna which is an Example of this invention. It is a side view which shows the state which is inserting the axial part in an insertion hole in the parabolic antenna which is an Example of this invention. It is a side view which shows the state which is inserting the axial part in the insertion hole in the parabolic antenna which is an Example of this invention with sectional drawing. It is a side view which shows the state by which the axial part was inserted by the hole in the parabolic antenna which is an Example of this invention. It is a side view which shows the state by which the axial part was inserted by the hole in the parabolic antenna which is an Example of this invention with sectional drawing. It is a perspective view which shows the state by which the axial part was inserted by the hole in the parabolic antenna which is an Example of this invention. It is a side view which shows the state which fitted the connection part to the arm fixing | fixed part in the parabolic antenna which is an Example of this invention. It is a side view which shows the state which fitted the connection part to the arm fixing | fixed part in the parabolic antenna which is an Example of this invention with sectional drawing. It is a rear view which shows the state which connected the connection part to the arm fixing | fixed part in the parabolic antenna which is an Example of this invention. It is a perspective view which shows the state which fitted the connection part to the arm fixing | fixed part in the parabolic antenna which is an Example of this invention. It is a perspective view which shows the detailed structure of the reflective-mirror attachment part in the parabolic antenna which is an Example of this invention. It is a perspective view which shows the state which attached the mast to the reflective-mirror attachment part in the parabolic antenna which is an Example of this invention. It is a perspective view which shows the structure which bent the stopper of the reflective-mirror attachment part in the parabolic antenna which is an Example of this invention. It is a perspective view which shows the state which attached the middle of the mast to the reflective-mirror attachment part in the parabolic antenna which is an Example of this invention. It is a side view which shows an example of a structure of the conventional reflector antenna. It is a perspective view which expands and shows the structure of the reflective mirror attaching part in an example of a structure of the conventional reflective mirror antenna. It is a perspective view which shows the state which attached to the reflector attachment part in an example of the structure of the conventional reflector antenna. It is a side view which shows the other example of a structure of the conventional reflector antenna. It is a perspective view which shows the structure of the connection part and arm fixing | fixed part in the other example of a structure of the conventional reflector antenna. It is a perspective view which shows the state which fitted the connection part in the other example of a structure of the conventional reflector antenna to the arm fixing | fixed part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Parabolic antenna, 10 Reflecting mirror, 11 Reflecting mirror attaching part, 12 Arm fixing | fixed part, 12a Extending part, 12b Fitting frame part, 12c Insertion hole, 12d Cable holder, 12e Cavity part, 12f Reinforcing piece, 12g Hole part, 12h Engaging piece, 12i stepped portion, 12j punch hole, 13 arm portion, 13a connecting portion, 13b holding portion, 13c locking piece, 13d protrusion, 13e shaft portion, 13f slit, 13g groove portion, 13h holding plate, 13j arm, 14 converter, 14a output terminal, 14b housing, 14c horn, 15 support part, 15a arc-shaped long hole, 15b insertion hole, 15c scale, 20 fixing bracket, 20a body part, 20b stopper, 20c cut-and-raised part, 21 clamping bracket , 21a long hole, 22 bolt, 23 pivot bolt, 24 adjustment bolt, 50 mass , 100 Parabolic antenna, 110 reflector, 111 reflector mounting part, 113 arm part, 114 converter, 115 support bracket, 115a body part, 115b side plate, 115c arc-shaped elongated hole, 115d mounting leg, 116 bolt, 117 bolt, 120 Fixing bracket, 120a body portion, 120b stopper bracket, 120c side plate, 121 clamping bracket, 121a long hole, 122 bolt, 200 parabolic antenna, 210 reflector, 211 reflector mounting portion, 212 arm fixing portion, 212a engagement piece, 212b Guide portion, 212c groove portion, 212d holder, 213 arm portion, 214 converter, 215 connecting portion, 215a elastic engagement piece, 215b rail piece, 215c bottom plate, 215d stopper face plate

Claims (5)

A reflector mounting portion that is disposed on the back surface of the reflector and holds the reflector, and includes a mounting bracket for mounting on the pole;
An arm fixing portion extended from the reflecting mirror mounting portion to a portion located outward from the outer peripheral edge of the reflecting mirror;
An arm portion having an arm that supports the converter fixed to the tip portion, and a connecting portion that is detachably attached to the arm fixing portion formed at the rear end portion of the arm;
The connecting part is formed with a holding part for holding both sides of the arm fixing part, a holding plate provided from the bottom part to the rear part of the holding part, and a shaft part having an irregular cross-sectional shape. The arm fixing portion is sandwiched between the insertion hole into which the shaft portion is inserted, a hole portion formed at an end portion of the insertion hole, the shaft portion being rotatable, and the sandwiching portion, and the insertion hole. And a fitting frame portion that is held by the holding plate when the shaft portion that is inserted into the hole portion and inserted into the hole portion is rotated.   The reflector antenna according to claim 1, wherein a slit is formed in a major axis direction of the shaft portion, and a punched hole is formed around the hole portion.   A pair of locking pieces protruding from the rear end of the connecting portion to the rear side is formed, protrusions are formed on the opposing surfaces of the locking pieces, and the shaft portion fitted in the hole portion rotates. 2. The reflector antenna according to claim 1, wherein the projections are respectively engaged with upper surfaces of a pair of engagement pieces projecting rearward from a rear end of the arm fixing portion. .   The cross-sectional shape of the shaft portion is a shape obtained by cutting the top and bottom of a round bar, the shaft portion is an irregular shape having a parallel surface that can pass through the insertion hole along the long axis, and the shape of the hole portion is substantially the same. The reflector antenna according to claim 1, wherein the reflector antenna is circular.   The arm fixing portion is formed at a distal end portion of an extending portion extending from the reflecting mirror mounting portion, and the width of the arm fixing portion is slightly narrower than the width of the extending portion. The upper edge of both sides of the clamping part is brought into contact with the step part when the shaft part fitted in the hole is rotated. The reflector antenna according to 1.

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