JP2011250314A - Antenna mounting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antenna mounting device which has an extending and retracting function of a mast and with which an antenna can be mounted at a high position and the mounting height of the antenna can be adjusted.SOLUTION: A mast 11 comprises a fixed mast 12 and a movable mast 13 and the height position of the movable mast 13 is configured to be adjustable. On the fixed mast 12, mounting fitting 15 is attached to its bottom edge and a first fixing part 21, a second fixing part 22 and a third fixing part 23 are provided inside its top edge to fix the position of the movable mast 13. The third fixing part 23 is fixed with bolts 34 with a flange part 32 inserted into the fixed mast 12 and a screw part 33 is protruded out of the top edge of the fixed mast 12. A grip 36 is attached to the screw part 33 with a rubber ring 35 interposed therebetween and fastened to deform the rubber ring 35 for tentatively fixing the movable mast 13. The first fixing part 21 is crimped to the movable mast 13 for fixing by fastening a mast fixing bolt 27 protruded out of the fixed mast 12 with a nut 31.

Description

  The present invention relates to an antenna mounting apparatus for mounting an antenna used for digital terrestrial broadcasting or wireless communication to a veranda of a house.

  Terrestrial Integrated Services Digital Broadcasting (ISTB-T) began broadcasting in December 2003 in the Kanto, Kinki, and Chukyo regions, and is in a transitional period of widespread use in 2010. . In the terrestrial digital broadcasting, radio waves in the UHF band are used, the frequency band is 470 to 770 MHz (13 to 62 channels), and horizontal polarization is mainly used.

  Conventionally, the terrestrial digital broadcast receiving antenna is installed on the roof of a house, or is installed on the veranda using an antenna mounting bracket. When the antenna is installed on the roof, the construction cost is very high. Therefore, in general households, the antenna mounting bracket is mounted on the veranda on the second floor, and the antenna is mounted on the mast of the mounting bracket (for example, Patent Document 1). reference.).

  However, conventional antenna mounting brackets with a mast height of generally about 25 to 50 cm are used, and the installation height of the antenna cannot be made too high.

  In radio wave propagation on the ground such as terrestrial broadcasting and communication, if the height of the receiving antenna is low, the electric field strength is reduced accordingly. The veranda on the second floor is 4 to 5 m from the ground. If a terrestrial broadcast wave is received at such a high position, the electric field strength decreases due to the influence of urban attenuation. In addition, when the antenna is installed on the veranda, the reception level may be lowered due to the height pattern, but the conventional veranda bracket does not have a function to adjust the height of the mast, so the height position of the antenna is adjusted. Therefore, there is a problem that the optimal position cannot be set.

Design Registration No. 1263908

  As described above, the conventional antenna mounting bracket has a mast height of about 25 to 50 cm, and the installation height of the antenna cannot be increased too much. Also, the conventional antenna mounting bracket does not have a function to adjust the height of the mast, so if the reception level is lowered due to the height pattern, adjust the antenna height position to set it to the optimal position. There was a problem that could not.

  Also, when trying to install the antenna on the veranda using a long mast for installation on the roof of a house, it is necessary to install the antenna after attaching it to the mast, and the total weight is heavy and difficult to install. The risk of accidentally dropping the mast down was very high.

  The present invention has been made to solve the above-described problems, and provides an antenna mounting device that can easily install an antenna at a higher position, has a mast expansion / contraction function, and can adjust the installation height of the antenna. The purpose is to do.

  An antenna mounting device according to the present invention is provided with respect to a first mast, a second mast for antenna mounting provided with an adjustable height position with respect to the first mast, and the first mast. It is characterized by comprising a fixing means for fixing the second mast at an arbitrary height position, and an attachment fitting for attaching the first mast to an attachment member.

  According to the present invention, the antenna can be installed at a high position to improve city attenuation and electric field strength, and the height of the antenna can be adjusted to set the reception state to the optimum position, and the antenna can be installed easily. Can be done.

1 is a perspective view showing a partial cross section of an antenna mounting device according to a first embodiment of the present invention. (A) is the front view which shows a part (fixed mast part) cross section and shows the antenna mounting apparatus based on the Example 1, (b) is the top view. (A) is sectional drawing which expands and shows the fixed mast of the antenna mounting apparatus based on the Example 1, and the fixed part of a movable mast, (b) is a side view which shows the upper end part of a fixed mast. It is a disassembled perspective view which shows the attachment metal fitting part of the antenna attachment apparatus which concerns on the Example 1. FIG. It is a disassembled perspective view for demonstrating the assembly order of the antenna attachment apparatus which concerns on the Example 1. FIG. (A) is a perspective view which shows the assembly process of the antenna attachment apparatus based on the Example 1, (b) is a perspective view which shows the state after completion of the assembly. The example in the case of installing an antenna in the veranda of a house using the antenna attachment apparatus which concerns on the same Example 1 is shown, (a) is a perspective view which shows the state which mounted | wore the fence of the veranda, (b) is It is a perspective view which shows the state which attached the vertically long antenna to the same antenna attachment apparatus, and extended the movable mast upwards. It is a perspective view which shows the state which attached the horizontally long antenna to the antenna attachment apparatus which concerns on the Example 1. FIG. It is a perspective view which shows the various attachment examples of the antenna attachment apparatus which concerns on the Example 1. FIG. It is a disassembled perspective view which shows the structural example of the mounting bracket of the antenna mounting apparatus which concerns on Example 2 of this invention. It is a perspective view which shows the state after the assembly of the attachment metal fitting in Example 2 is completed. It is a perspective view which shows the structural example of the attachment bracket of the antenna attachment apparatus which concerns on Example 3 of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view showing a partial cross section of an antenna mounting apparatus according to Embodiment 1 of the present invention. FIG. 2A is a front view showing a part (fixed mast portion) of the antenna mounting device in cross section, and FIG. 2B is a top view thereof. FIG. 3A is an enlarged cross-sectional view showing a fixed mast and a fixed portion of the movable mast of the antenna mounting device, and FIG. 3B is a side view showing an upper end portion of the fixed mast. FIG. 4 is an exploded perspective view showing a mounting bracket portion of the antenna mounting apparatus. FIG. 5 is an exploded perspective view for explaining the assembly order of the antenna mounting device. FIG. 6A is a perspective view showing an assembly process of the antenna mounting device, and FIG. 6B is a perspective view showing a state after the assembly is completed.

  In FIG. 1 to FIG. 4, reference numeral 11 denotes an antenna mast formed in a cylindrical shape using a metal member. The antenna mast includes a fixed mast 12 having a large diameter and a movable mast 13 having a smaller diameter than the fixed mast 12. The movable mast 13 can be inserted and moved. Although the movable mast 13 is formed in a hollow shape, the inside of the movable mast 13 can be a honeycomb structure 14 or the like in order to maintain strength. For example, the fixed mast 12 has a diameter φ1 of about 50 mm and a length L1 of about 0.8λa, and the movable mast 13 has a diameter φ2 of about 26 mm and a length L2 of about 1λa. Λa indicates the wavelength at the lower end frequency (470 MHz) of the terrestrial broadcasting digital broadcast wave band.

  At the lower end of the fixed mast 12, a mounting bracket 15 for mounting the mast 11 on a veranda or the like of a house is mounted by a bracket mounting bolt 16 and a nut 17. As shown in FIG. 4, a bolt hole 18 for attaching a metal fitting is provided at the lower end portion of the fixed mast 12, and an attachment metal 15, which will be described in detail later, is attached using this bolt hole 18. The bracket mounting bolt 16 inserted into the bolt hole 18 also serves as a lower stopper of the movable mast 13 inserted into the fixed mast 12.

  Further, as shown in detail in FIGS. 3A and 5, a first fixing portion 21 is provided on the inner side of the upper end portion of the fixing mast 12. A fixing part 23 is provided. As shown in FIG. 3B, a bolt hole 201 for attaching the first fixing portion 21 is provided at the upper end portion of the fixing mast 12, and a bolt for fixing the second fixing portion 22 to the lower side thereof. The hole 202 and the bolt hole 203 for fixing the 3rd fixing | fixed part 23 are provided in the lower side. In this case, there is one bolt hole 201 for attaching the first fixing portion 21, a bolt hole 202 for fixing the second fixing portion 22, and 203 for fixing the third fixing portion 23 are peripheral edges of the fixing mast 12. A plurality of, for example, four are provided at predetermined intervals along the line.

  The second fixed portion 22 is formed in a ring shape using a synthetic resin, and has an outer diameter slightly smaller than the inner diameter of the fixed mast 12 and an inner diameter larger than the diameter of the movable mast 13. The second fixing portion 22 is inserted inside the upper end portion of the fixing mast 12 and is fixed to the bolt hole 202 by a bolt 24 inserted from the outside.

  The first fixed portion 21 is formed in a cylindrical shape by a member having elasticity, for example, a synthetic resin. The outer diameter is set smaller than the inner diameter of the fixed mast 12, and the inner diameter is set slightly larger than the diameter of the movable mast 13. The first fixing portion 21 is provided with a plurality of reinforcing protrusions 25 along the outer periphery. Further, the first fixing portion 21 is provided with a notch 26 at a part of the outer center, and a bolt hole is provided on the opposite side of the notch 26. A mast fixing bolt 27 is inserted into the first fixing portion 21 from the cut 26 side into the bolt hole. At this time, the head of the mast fixing bolt 27 is locked in the bolt hole. The mast fixing bolt 27 inserted into the bolt hole of the first fixing portion 21 protrudes outside from the bolt hole 201 provided in the fixing mast 12, and a spring washer 29 and a flat washer 30 are interposed at the protruding tip. The mast fixing nut 31 is screwed. The first fixing portion 21 is formed so as to have a predetermined interval between the outer peripheral surface opposite to the notch 26 and the inner peripheral surface of the fixed mast 12, and is a mast fixing nut screwed to the mast fixing bolt 27. When tightening 31, a force in the direction of the mast fixing nut 31 is applied via the mast fixing bolt 27, and the inner surfaces of the upper and lower ends of the cut 26 are pressed against the movable mast 13 to fix the position of the movable mast 13. It can be done.

  The third fixing portion 23 is formed in a cylindrical shape using, for example, a synthetic resin, and is provided with a flange portion 32 on the lower side and a screw portion 33 on the upper side. The inner diameter of the third fixed portion 23 is set slightly larger than the diameter of the movable mast 13. The flange portion 32 has an outer diameter slightly smaller than the inner diameter of the fixed mast 12 and is inserted inside the upper end portion of the fixed mast 12 and is fixed to the bolt hole 203 by a bolt 34 inserted from the outside. In this case, the third fixing portion 23 is fixed by inserting only the flange portion 32 into the fixing mast 12, and the screw portion 33 is held in a state of protruding outward from the upper end of the fixing mast 12. An upper side of the third fixing portion 23 is provided with a ring-shaped recess that is slightly lower than the peripheral edge, and a rubber ring (packing) 35 is placed in the recess. The rubber ring 35 is approximately the same size as the recess, and its inner diameter is set to be approximately the same as the diameter of the movable mast 13. The rubber ring 35 is formed thicker than the depth of the recess, and protrudes upward from the recess when placed in the recess.

  A grip 36 made of, for example, synthetic resin is screwed to the screw portion 33 of the third fixing portion 23. As shown in FIG. 3A, the grip 36 is provided with an insertion hole 37 through which the movable mast 13 is inserted at the upper center. The grip 36 is provided with a female screw portion 38 that is screwed into the screw portion 33 of the third fixing portion 23 on the inner peripheral surface, and a ring-shaped protrusion along the upper inner surface, that is, the outer periphery of the insertion hole 37. A portion 39 is provided. When the grip 36 is screwed and tightened to the screw portion 33 of the third fixing portion 23, the protrusion 39 provided on the upper inner surface is pressed against the rubber ring 35, and the rubber ring 35 is deformed to deform the movable mast 13. It is crimped to the outer peripheral surface of and held in its position.

  On the other hand, a ring-shaped steady rest 41 is fixed to the lower end of the movable mast 13 by a plurality of screws 42. For example, a pan-head screw is used as the screw 42 and is screwed so as not to protrude from the outer peripheral surface of the steady rest 41. The steady rest 41 is formed so that the outer diameter is slightly smaller than the inner diameter of the fixed mast 12 and prevents the movable mast 13 from sideways in the fixed mast 12 and restricts the movable range of the movable mast 13. That is, the steady rest 41 moves in the fixed mast 12 as the movable mast 13 expands and contracts. When the movable mast 13 is moved downward, the steady rest 41 abuts on the bracket mounting bolt 16 of the mounting bracket 15 to move the movable mast 13. When moving in the upward direction, the movable range of the movable mast 13 is restricted by contacting the second fixed portion 22. The movable mast 13 can be expanded and contracted within a range of about 0.5λa, for example.

  In addition, two pairs of antenna mounting holes 43a and 43b are provided at a predetermined interval on the upper side of the movable mast 13.

  The mounting bracket 15 attached to the lower end portion of the fixed mast 12 includes a holder 45, base brackets 46a and 46b, and bands 47a and 47b as shown in detail in FIG.

  The holder 45 includes a cylindrical holder portion 51 and folded portions 52a and 52b. The cylindrical holder portion 51 has a side portion opened with a predetermined width, and both sides of the opening portion are folded sideways by a predetermined length to form folded portions 52a and 52b. The cylindrical holder portion 51 is formed with an inner diameter slightly larger than the diameter of the fixed mast 12, and is used for mounting a pair of fixed masts at a position in the center of the side portion, that is, at a position approximately 90 ° from the folded portions 52a and 52b. Bolt holes 53 are provided. The bolt hole 53 corresponds to the bolt hole 18 provided in the lower end portion of the fixed mast 12.

  The folded portions 52a and 52b of the cylindrical holder portion 51 are provided with a gap that allows a part of the base metal fittings 46a and 46b to be inserted, and the front end side is bent outward at a predetermined angle. Further, the folded portions 52a and 52b are provided with bolt holes 54 for fixing the base metal fittings 46a and 46b in the vicinity of the upper and lower ends and the center.

  The base metal fittings 46a and 46b are provided with folded portions 55a and 55b in which upper and lower ends are folded back to the holder 45 side. The folded portions 55a and 55b are formed so that the inner folded width is wide and the outer folded width is narrow. The folded portions 55a and 55b are further bent 90 ° to the opposite inner side, that is, the folded portion 55a located at the upper portion bends the inner end 90 ° downward, and the folded portion 55b located at the lower portion is bent to the inner end. A bent portion 56 is formed by bending 90 ° upward. Each bent portion 56 is provided with a bolt hole 57. The height dimension of the base metal fittings 46a, 46b is set to a value slightly larger than the folded portions 52a, 52b of the holder 45 so that the folded portions 55a, 55b are positioned on the upper and lower outer sides of the folded portions 52a, 52b of the holder 45. Composed.

  In addition, the base metal fittings 46a and 46b are each provided with, for example, a rectangular attachment hole 58 at a predetermined interval, two in the vertical direction. Further, the base metal fittings 46a and 46b are provided with bent portions 59 obtained by bending the opposing inner pieces toward the holder 45 at a predetermined angle. The bent portion 59 is bent at an angle corresponding to the bent end portions of the folded portions 52 a and 52 b of the holder 45.

  In the base metal fittings 46a and 46b, the bent portions 56 provided on the inner and upper sides are inserted between the folded portions 52a and 52b, and the bolt holes 57 of the folded portions 56 are inserted into the bolt holes 54 of the folded portions 52a and 52b of the holder 45. The bolts 61 are inserted into the respective bolt holes 54, and the nut 62 is lightly fastened with a spring washer and a plain washer at the tip.

  As described above, the holder 45 in which the base metal fittings 46 a and 46 b are attached to the folded portions 52 a and 52 b of the cylindrical holder 51, the bolt holes 53 and 18 are positioned on the outer periphery of the lower portion of the fixed mast 12. At the same time, the bracket mounting bolt 16 is inserted into the bolt holes 53 and 18, and the nut 17 is screwed to the tip of the bolt hole 53 via a washer, and is fastened and fixed. At this time, the bolt 61 and the nut 62 attached to the folded portions 52 a and 52 b of the cylindrical holder portion 51 are tightened, and the diameter of the cylindrical holder portion 51 is reduced and fixed to the fixed mast 12.

  Further, the bands 47a and 47b are formed by being bent into a substantially U-shape when viewed from the side, and the folded end portions are folded back by a predetermined width to form folded portions 64. By providing the folded portion 64, the strength of the bands 47a and 47b is improved. Further, the bands 47 a and 47 b are provided with an arc-shaped notch 65 at the upper and lower bent surfaces and the center of the folded portion 64. Small irregularities are continuously formed on the surface provided with the notch 65.

  The mounting bracket 15 is mounted by sandwiching an antenna support or a veranda member between the bent portion 59 of the base brackets 46a and 46b and the notch 65 of the bands 47a and 47b. It is solid.

  The bands 47a and 47b are provided with rectangular attachment holes 67 on the left and right sides of the front surface. The mounting hole 67 is provided at a position corresponding to the mounting hole 58 of the base metal fittings 46a and 46b.

  The bands 47a and 47b are positioned to face the front surfaces of the base metal fittings 46a and 46b, and the square root bolts 68 are inserted into the attachment holes 67 of the bands 47a and 47b and the attachment holes 58 of the base metal fittings 46a and 46b from the outside. A nut 69 is screwed to the tip.

  Next, the assembly process of the antenna mounting apparatus configured as described above will be described with reference to FIGS.

  First, the 2nd fixing | fixed part 22 is inserted from the upper end opening part of the fixed mast 12, and it fixes to a predetermined position by screwing. Next, the mast fixing bolt 27 is inserted into the first fixing portion 21 through the notch 26 and is positioned in the bolt hole. The first fixing portion 21 is inserted together with the mast fixing bolt 27 from the upper end opening of the fixing mast 12, and placed on the second fixing portion 22, and the tip of the mast fixing bolt 27 inserted into the bolt hole is fixed. After adjusting the position so as to face the bolt hole 201 provided in the mast 12 (see FIG. 3B), the head of the mast fixing bolt 27 is pushed by, for example, a finger or a rod-shaped tool, etc. The tip is projected from the bolt hole 201 to the outside of the fixed mast 12. A mast fixing nut 31 is screwed onto a mast fixing bolt 27 protruding outside from the bolt hole 201 of the fixing mast 12 with a spring washer 29 and a flat washer 30 interposed therebetween. At this time, the mast fixing nut 31 is loosely attached to the mast fixing bolt 27 and is not tightened.

  Next, the flange portion 32 of the third fixing portion 23 is inserted into the upper end opening of the fixing mast 12, and is fixed to the fixing mast 12 with a bolt 34. At this time, the screw portion 33 of the third fixing portion 23 is held in a state of protruding outward from the upper end of the fixing mast 12.

  On the other hand, the movable mast 13 fixes a steady rest 41 with a screw 42 at the lower end. The movable mast 13 to which the steady rest 41 is attached is inserted into the fixed mast 12 from the lower end side, and the tip is inserted through the second fixed portion 22, the first fixed portion 21, and the third fixed portion 23. Project outside from the top.

  Thereafter, the mounting bracket 15 is attached to the lower end of the fixed mast 12. In this case, the mounting bracket 15 is in a state in which the base metal fittings 46a and 46b are previously attached to the folded portions 52a and 52b of the cylindrical holder portion 51, and the bands 47a and 47b are removed from the base metal fittings 46a and 46b. In this case, the bolts 61 and nuts 62 for attaching the folded portions 52a, 52b and the base metal fittings 46a, 46b of the cylindrical holder 51 are lightly stopped, and the diameter of the cylindrical holder 51 is kept large so that the fixed mast 12 It is designed to be easily installed at the bottom.

  The mounting bracket 15 is configured such that the cylindrical holder portion 51 is positioned outside the lower portion of the fixed mast 12, and the bolt hole 53 of the cylindrical holder portion 51 is made to coincide with the bolt hole 18 of the fixed mast 12. The nut 17 is inserted into the front end of the nut 17 through a spring washer and a plain washer, and is fastened and fixed. At this time, the bolt 61 and the nut 62 attached to the folded-back portions 52a and 52b of the cylindrical holder portion 51 are tightened, and the diameter of the cylindrical holder portion 51 is reduced to be firmly fixed to the fixed mast 12.

  After that, as shown in FIG. 6, the bands 47 a and 47 b are attached to the base metal fittings 46 a and 46 b of the attachment metal 15 with the square root bolts 68 and the nuts 69.

  The movable mast 13 protruding upward from the fixed mast 12 is fitted with the rubber ring 35 and the grip 36, and the grip 36 is fixed to the third fixed portion with the rubber ring 35 placed on the upper side of the third fixing portion 23. Screwed onto the threaded portion 33 of the portion 23.

  This completes the assembly of the antenna mounting device.

  Next, an example in which an antenna is installed using the antenna mounting device will be described.

  FIG. 7 shows an example in which an antenna is installed on a veranda of a house using the antenna mounting device, wherein (a) is a perspective view showing a state in which the antenna mounting device is mounted on a veranda fence, and (b). FIG. 4 is a perspective view showing a state where an antenna is attached to the antenna attachment device and the movable mast 13 is extended upward.

  First, as shown in FIG. 7A, with the movable mast 13 of the antenna mounting device lowered to the lowest position, the mounting bracket is attached to a place where the antenna is installed, for example, a lattice 73 constituting the fence 72 of the veranda 71. 15 is installed. That is, with the bands 47 a and 47 b removed from the base metal fittings 46 a and 46 b of the attachment metal 15, for example, the base metal fittings 46 a and 46 b are positioned inside the upper portion of the lattice 73 and the bands 47 a and 47 b are placed outside the lattice 73. The bands 47a and 47b are attached to the base metal fittings 46a and 46b by the square root bolts 68 and the nuts 69, and the lattice 73 is sandwiched between the base metal fittings 46a and 46b and the bands 47a and 47b.

  Then, the antenna 80 is attached to the upper end of the movable mast 13 with bolts 88a and 88b.

  The antenna 80 is a UHF band antenna formed in a vertically long shape, for example, and a radiating element and a reflecting element (not shown) for receiving UHF band radio waves are provided in a resin case 81.

  The resin case 81 includes a front case 82 and a back case 83. The front case 82 and the back case 83 are provided with, for example, a vertically long oval window 84 at an upper portion. Further, the rear case 83 is provided with a plug insertion hole 85 below the window 84, and a plug 86 is disposed in the plug insertion hole 85.

  Further, a semicircular groove-like mast mounting portion 87 is provided at the lower portion of the back case 83. The mast mounting portion 87 is provided with bolt mounting base portions 89a and 89b with a predetermined interval in the vertical direction, and the bolts 88a and 88b can be screwed to the bolt mounting base portions 89a and 89b. . The bolt mounting bases 89 a and 89 b correspond to the antenna mounting holes 43 a and 43 b provided in the upper part of the movable mast 13.

  When the antenna 80 is attached to the movable mast 13, the upper portion of the movable mast 13 is positioned on the mast mounting portion 87 of the rear case 83, bolts 88a and 88b are inserted into the antenna mounting holes 43a and 43b, and the bolts 88a and 88b are tightened. The mast mounting portion 87 is fixed to the bolt mounting base portions 89a and 89b.

  Next, the movable mast 13 is extended upward together with the antenna 80, and the movable mast 13 is rotated so that the front surface of the antenna 80 is aligned with the arrival direction of radio waves. In this state, the grip 36 screwed to the screw portion 33 of the third fixing portion 23 is manually tightened to temporarily fix the position of the movable mast 13. When the grip 36 is tightened, the rubber ring 35 is deformed by being pressed by a ring-shaped protrusion 39 provided on the inner upper surface of the grip 36, and is pressed against the outer peripheral surface of the movable mast 13 to maintain the position of the movable mast 13. To do.

  In this state, the mast fixing nut 31 screwed to the mast fixing bolt 27 of the first fixing portion 21 is tightened with a tool such as a spanner, and the mast fixing bolt 27 is pulled outward. At this time, the first fixing portion 21 is deformed by the portion engaging with the mast fixing bolt 27 being pulled outward together with the mast fixing bolt 27, and the inner peripheral surface positioned above and below the notch 26 is movable mast. The outer mast 13 is pressed against the outer peripheral surface with a large force, and the position of the movable mast 13 with respect to the fixed mast 12 is firmly fixed and fixed. This completes the antenna installation work.

  As shown in the first embodiment, by configuring the mast 11 so that it can be expanded and contracted by the fixed mast 12 and the movable mast 13, the position of the antenna 80 can be made higher by 1λa or more than before, and the city attenuation can be improved. Even when only the amount is viewed, it is possible to improve the antenna gain by about 3 dB. In addition, by increasing the installation position of the antenna 80, not only urban attenuation and electric field strength can be improved, but also the influence of the shielding object can be avoided with high probability.

  Moreover, since the height of the movable mast 13 can be adjusted in a range of about 0.5λa, when the reception level is lowered due to the height pattern, the height of the antenna is adjusted so that the reception state is optimal. Is possible.

  In addition, since the movable mast 13 can be expanded and contracted, the antenna 80 can be attached with the movable mast 13 lowered, and then the movable mast 13 can be extended to raise the position of the antenna 80. Even if the antenna 80 is installed on the veranda on the second floor by itself, the work can be performed safely and easily without using a step ladder or a ladder.

  The antenna mounting device is not only for temporarily fixing the grip 36 by hand when fixing the position of the movable mast 13, but also for fixing the mast that is screwed to the mast fixing bolt 27 of the first fixing portion 21. Since the nut 31 is tightened using a tool such as a spanner and is finally fixed, a stable installation state can be maintained over a long period of time.

  In addition, the mounting bracket 15 shown in the first embodiment can reliably prevent the mast 11 from falling in the front-rear direction by providing the folded portions 52a and 52b above and below the base brackets 46a and 46b.

  In addition, the dimension of each part shown in the said Example 1 shows an example at the time of setting about the height of the person who installs, for example, a person whose height is about 160 cm, and according to conditions etc. It can be set to any value.

  Further, in the first embodiment, the case where the vertically long antenna 80 is attached to the mast 11 of the antenna attachment device has been described. However, the antenna 80 of other shapes, for example, a horizontally long antenna 80A as shown in FIG. Similarly to the case of the first embodiment, the antenna can be attached to the mast 11 of the antenna attachment device. In the example in this case, it attaches to the mast 11 using the attachment metal fitting 90 provided in the back surface of the antenna 80A.

  In the first embodiment, the case where the mounting bracket 15 of the antenna mounting device is mounted on the grid 73 of the veranda 71 is shown as an example. However, for example, as shown in FIG. It is possible to install.

  FIG. 9A shows an example in which the mounting bracket 15 of the antenna mounting device is attached using the support structure 75 when the handrail 76 is provided on the concrete wall 74 of the veranda 71 by the support structure 75. Is shown.

  FIG. 9B shows an example in which the mounting bracket 15 of the antenna mounting device is mounted on a prismatic column 77.

  FIG. 9C shows an example in which the mounting bracket 15 of the antenna mounting device is mounted on a columnar column 78.

  In addition, in the said Example 1, although the case where the 1st fixing | fixed part 21 was comprised with the synthetic resin was shown, you may comprise using metal members which have elasticity, such as aluminum, for example.

  Moreover, although the said 1st fixing | fixed part 21 was comprised so that it might provide and reinforce with the some protrusion 25 along an outer periphery, you may make it increase in intensity | strength by forming thickly as a whole.

  Further, the first fixing portion 21 has the cut 26 at the center of the side, but instead of the cut 26, a hole having a size that allows the mast fixing bolt 27 to be inserted may be provided.

  Further, the mounting bracket 15 of the antenna mounting device is not limited to the one shown in the first embodiment, and can have any configuration. Hereinafter, another configuration example of the mounting bracket 15 will be described.

  FIG. 10 is an exploded perspective view illustrating a configuration example of the mounting bracket 15A of the antenna mounting apparatus according to the second embodiment, and FIG. 11 is a perspective view illustrating a state in which the mounting bracket 15A is assembled. The mounting bracket 15A according to the second embodiment is different from the mounting bracket 15 according to the first embodiment in the shape of the base brackets 46a and 46b, and other configurations are the same as those in the first embodiment. Detailed description will be omitted.

  The base metal fittings 46a and 46b are formed by bending a rectangular metal plate by 90 ° in the vicinity of the center, and using the front surface side as a band mounting surface 91 and the bent side surface as a holder mounting surface 92. The band mounting surface 91 is provided with a stepped portion 93 formed one step lower and a member holding portion 94 formed inclined at a predetermined angle between the band mounting surface 91 and the holder mounting surface 92. The inclination angle of the member holding portion 94 corresponds to the angle of the bent portion provided at the front ends of the folded portions 52 a and 52 b of the holder 45.

  In the band mounting surface 91 of the base metal fittings 46a and 46b, rectangular mounting holes 58 are provided in the horizontal direction in the vicinity of the upper and lower side portions.

  Further, for example, three bolt holes 57 are provided in the holder mounting surface 92 of the bands 47a and 47b. The bolt holes 57 are provided at positions corresponding to the three bolt holes 54 provided in the folded portions 52 a and 52 b of the holder 45.

  When assembling the mounting bracket 15A configured as described above, the holder mounting surface 92 of the base brackets 46a and 46b is inserted between the folded portions 52a and 52b of the holder 45 as shown in FIGS. The bolt holes 54 of the parts 52a and 52b and the bolt holes 57 of the holder mounting surface 92 are matched. Bolts 61 are inserted into the bolt holes 54 and the bolt holes 57 that are made to coincide with each other, and nuts 62 are screwed onto the ends of the bolts 61 with spring washers and plain washers interposed therebetween, and are fastened and fixed.

  Further, the bands 47a and 47b are positioned to face the front surfaces of the base metal fittings 46a and 46b, and the square root bolts 68 are inserted into the attachment holes 67 of the bands 47a and 47b and the attachment holes 58 of the base metal fittings 46a and 46b from the outside. A nut 69 is screwed to the tip.

  The mounting bracket 15A is mounted by sandwiching, for example, a lattice of a fence provided on the veranda between the base brackets 46a and 46b and the bands 47a and 47b. In this case, if the member to be attached is a columnar column, the column is held between the member holding portion 94 of the base metal fittings 46a and 46b and the notch 65 of the bands 47a and 47b.

  Further, if the member to which the mounting bracket 15A is attached is a prismatic column, the column is clamped between the stepped portion 93 of the base brackets 46a and 46b and the position outside the notch 65 of the bands 47a and 47b.

  Also in the mounting bracket 15A according to the second embodiment, the mast 11 can be securely held by the holder 45 by being firmly attached to a veranda fence or the like.

  FIG. 12 is a perspective view illustrating a configuration example of the mounting bracket 15B of the antenna mounting device according to the third embodiment. The mounting bracket 15B according to the third embodiment is configured as a band 47 by integrating the bands 47a and 47b of the mounting bracket 15 according to the first embodiment, and the other configurations are the same as the first embodiment. Parts are denoted by the same reference numerals and detailed description thereof is omitted.

  The band 47 is formed by being bent into a substantially U-shape when viewed from the side, similarly to the bands 47a and 47b in the first embodiment, and the folded tip portion is folded by a predetermined width to form a folded portion 64. Yes. The band 47 is set to a value slightly smaller than the height dimension of the base metal fittings 46a and 46b by extending the length in the vertical direction, but the lateral width is substantially the same as the bands 47a and 47b.

  The front surface of the band 47 is provided with two rectangular attachment holes 67a and 67b on the left and right along the upper side, and two rectangular attachment holes 67c and 67d on the left and right along the lower side. The mounting holes 67a to 67d are provided at positions corresponding to the mounting holes 58 provided in the base metal fittings 46a and 46b. Also, for example, bolt insertion holes 70a and 70b are provided in communication with the left end portions of the attachment holes 67b and 67d on the right side of the drawing. The diameters of the bolt insertion holes 70a and 70b are set to be larger than the diameters of the heads of the square root bolts 68 attached to the attachment holes 67a to 67d, and the heads of the square root bolts 68 are placed in the bolt insertion holes 70a and 70b. Can be inserted.

  By providing bolt insertion holes 70a and 70b in the mounting holes 67b and 67d of the band 47 as described above, the bolt holes 70a and 70b are used to attach and detach the mounting holes 67b and 67d from the head side of the square root bolt 68. can do. Accordingly, when a support post is sandwiched between the base metal fittings 46a, 46b and the band 47, the heads of the square root bolts 68 inserted into the mounting holes 67b, 67d are removed using the bolt insertion holes 70a, 70b. In this state, the base metal fittings 46a and 46b and the band 47 are positioned on both sides of the support column, and then the square root bolt 68 is returned from the bolt insertion holes 70a and 70b into the mounting holes 67b and 67d, and the nut 69 is tightened and fixed. To do.

  The square root bolts 68 inserted into the mounting holes 67b and 67d as described above can be attached to and detached from the mounting holes 67b and 67d without removing the nut 69, so that the mounting bracket 15B can be easily attached to a column or the like. .

  In the third embodiment, since the two bands 47a and 47b used in the first and second embodiments can be integrated into one band 47, the configuration of the mounting bracket 15B can be simplified and the cost can be reduced. .

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying constituent elements without departing from the scope of the invention in the implementation stage.

  DESCRIPTION OF SYMBOLS 11 ... Mast, 12 ... Fixed mast, 13 ... Movable mast, 14 ... Honeycomb structure, 15, 15A, 15B ... Mounting bracket, 16 ... Bracket mounting bolt, 17 ... Nut, 18 ... Bolt hole, 21 ... 1st fixing part, 22 ... 2nd fixing part, 23 ... 3rd fixing part, 24 ... bolt, 25 ... protrusion, 26 ... notch, 27 ... mast fixing bolt, 29 ... spring washer, 30 ... plain washer, 31 ... mast fixing nut , 32 ... Flange part, 33 ... Screw part, 34 ... Bolt, 35 ... Rubber ring, 36 ... Grip, 37 ... Insertion hole, 38 ... Female thread part, 39 ... Ring-shaped protrusion, 41 ... Stabilization, 42 ... Screw, 43a, 43b ... Antenna mounting hole, 45 ... Holder, 46a, 46b ... Base bracket, 47, 47a, 47b ... Band, 51 ... Cylindrical holder part, 52a, 52b ... Folded part, 53, 54 ... Bolt hole, 5 a, 55b ... folded portion, 56 ... bent portion, 57 ... bolt hole, 58 ... mounting hole, 59 ... bent portion, 61 ... bolt, 62 ... nut, 64 ... folded portion, 65 ... notch, 67, 67a ˜67d ... mounting hole, 68 ... square root bolt, 69 ... nut, 70a, 70b ... bolt insertion hole, 71 ... veranda, 72 ... fence, 73 ... lattice, 74 ... concrete wall, 75 ... support structure, 76 ... handrail , 77 ... prismatic column, 78 ... cylindrical column, 80, 80A ... antenna, 81 ... resin case, 82 ... front case, 83 ... back case, 84 ... window, 85 ... plug insertion hole, 86 ... contact Plug, 87: Mast mounting portion, 88a, 88b ... Bolt, 89a, 89b ... Base for bolt mounting, 90 ... Mounting bracket, 91 ... Band mounting surface, 92 ... Holder mounting surface, 93 ... Stepped portion, 94 ... Member holding portion , 201, 2 2,203 ... bolt hole.

Claims (1)

  A first mast, a second mast for mounting an antenna provided such that a height position thereof is adjustable with respect to the first mast, and an arbitrary height of the second mast with respect to the first mast. An antenna mounting apparatus comprising: a fixing means for fixing at the vertical position; and a mounting bracket for mounting the first mast to a mounting member.

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