JP4268550B2 - Antenna extension bracket - Google Patents

Description

  The present invention relates to an extension bracket for an additional antenna that can be attached to an existing antenna mounting bracket.

  Currently, digital terrestrial broadcasting plans are in progress, and terrestrial digital broadcast receiving antennas are becoming popular in the market. In addition to Yagi antennas, there are antennas that house dipole antennas, loop antenna elements, etc. in a thin housing as terrestrial digital broadcast receiving antennas. In order to receive terrestrial digital broadcasts, these can be used with conventional VHF / UHF antennas. It must be installed separately from the antenna for receiving broadcasts and the antenna for receiving BS / CS broadcasts.

  Conventionally, when mounting an antenna on a veranda or a wall surface, an antenna mounting bracket such as a verandah mounting bracket or a wall mounting bracket is used. In the conventional antenna mounting bracket, one antenna is mounted per one bracket. .

  However, when trying to add another antenna to the veranda or wall where one antenna is already installed, the new verandah mounting bracket and wall mounting will be performed while considering that the existing antenna and the additional antenna do not interfere with each other. I also had to add metal fittings. For this reason, a large amount of space is required to arrange a plurality of veranda mounting brackets and wall mounting brackets side by side.

  In Japan's small housing situation, it was not possible to secure a place to install multiple antennas, so it was necessary to give up viewing of the broadcast received by the additional antenna. In addition, even if the location can be secured, the existing aesthetics of a wide area of the veranda and the walls will be different in kind, or multiple existing antennas and additional antennas facing in different directions will be lined up side by side. The aesthetics were greatly impaired.

  In order to solve this problem, Japanese Patent Application Laid-Open No. 11-16831 discloses that a BS / CS broadcast receiving antenna mounting bracket is fitted with upper and lower poles so that it can slide in the axial direction. In the state, two parabolic antennas can be vertically mounted on both poles. As a result, two parabolic antennas can be neatly arranged vertically in a small space.

  In the mounting bracket described in Japanese Patent Laid-Open No. 11-168312, when only one parabolic antenna is installed, both poles are in a contracted state, that is, one pole is accommodated in the other pole to save space. Can be omitted. However, if an antenna is already installed with a general antenna mounting bracket, the existing antenna mounting bracket cannot be used to increase the number of antennas, and two antenna mounting brackets must be purchased. There was a problem of not becoming.

  Furthermore, for example, when a parabolic antenna for BS and a parabolic antenna for CS are added, they can be juxtaposed vertically because they do not interfere with each other due to the shape of the antenna and the direction and angle of arrival of radio waves. However, unlike this case, when the above-mentioned terrestrial digital broadcast receiving antenna is installed on the parabolic antenna that receives BS broadcast or CS broadcast, the terrestrial digital broadcast receiving antenna has a planar shape, If the antenna is simply installed above the antenna, the range through which the radio wave arriving at the reflector of the already installed parabolic antenna passes and the position of the terrestrial digital broadcast receiving antenna overlap, causing interference between the antennas. In order to prevent such interference, it is necessary to extend the extension antennas largely upward so that the radio wave arrival direction of the existing parabolic antenna is sufficiently opened.

  On the other hand, FIG. 8 is a side view showing a state in which an extension bracket is attached to the mast of an existing antenna fitting (20) for a parabolic antenna and the reflecting mirror is directed upward to match the maximum radio wave arrival angle, for example. It was. In this case, as shown by the arrows in the figure, the extension bracket hits the reflector of the existing antenna (22), and the mast cannot be extended. Therefore, it is necessary to lengthen the extension mast for attaching the extension antenna (13).

  When installing the antenna, it is necessary to consider the influence of the wind, but if the extension mast is lengthened, the wind pressure load on the extension antenna that receives strong wind will cause the long extension mast to act as a lever, There was a risk that an excessive load was applied to the mounting bracket from the beginning to destroy them, or the attached veranda or wall surface was destroyed.

JP-A-11-168312

  An object of the present invention is to provide an antenna extension metal fitting that can effectively use an existing antenna attachment metal fitting to attach an additional antenna at a low cost.

An antenna extension bracket according to the present invention is an antenna extension bracket connected to an existing antenna mounting bracket made of a tubular mast having one end opened and the other end fixed to a building. The antenna extension bracket is a tubular extension mast. If consists of a joint fittings for connecting fixing the tubular extension mast to the existing antenna mounting bracket, the tubular extension mast, first shaft portion and the second shaft portion, and the first shaft portion and the second the third consists of the shaft portion, the tubular extension is the tip of the mast the first shaft portion at one end to an expansion antenna can turn pivotally secured, the other end of the first shaft portion connecting the shaft portion one end of the second shaft portion are connected via the third shaft portion, and opening the other end of the second shaft portion is a rear end of the tubular extension mast, and the existing antenna attached to the one end and be adapted to abut the bracket, Oyo said existing antenna The first shaft portion and the second shaft portion have a predetermined interval so that the additional antennas have a positional relationship that does not interfere with each other, and the tubular extension mast has a substantially Z-shape. It was and the one end of the joint fitting is inserted and fixed to the other end opening of the tubular extension mast of the antenna extension bracket and the other end inserted and fixed to the one end opening of the tubular mast of the existing antenna mounting bracket, and The tubular extension mast can be rotated and positioned with respect to the tubular mast of the existing antenna mounting bracket by the joint bracket .

Further, the tubular extension mast has a first shaft portion that can be rotatably fixed to the additional antenna to the end, parallel to an axis of the first, the existing antenna mounting bracket tubular mast abutting the opening of and a second shaft portion having an end, the so existing antenna and the additional antenna is a position relation does not inhibit each other, the second shaft portion and the distance between the first shaft portion a, the joint fitting, said existing antenna and rotatably insertable base to one end opening of the tubular mast mounting member, said rotatably insertable extension at the open end of the tubular extension mast made, and the base has a base fixing means securable to the tubular mast of the existing antenna, the extension of the opening end and the joint fitting extension mast, mutually engageable locking You may make it have a means, respectively.

  According to the present invention, it is possible to provide an antenna mounting bracket capable of mounting an additional antenna at low cost by effectively using an existing antenna mounting bracket. Further, since two antennas can be installed in a compact manner, it is possible to prevent the veranda mounting bracket, the wall mounting bracket, the attached veranda or the wall surface from being damaged by the wind pressure load received by the additional antenna.

  The present invention will be described with reference to the drawings showing an embodiment. FIG. 1 is a side view showing a state in which an antenna extension fitting according to an embodiment of the present invention is attached. FIG. 2 is an assembly view showing attachment of the antenna extension fitting according to one embodiment of the present invention. FIG. 3 is an assembled perspective view showing the joint fitting used in the present invention.

  The antenna extension fitting (10) of the present invention comprises a circular extension mast (11) and a joint fitting (12), and is attached to the existing antenna attachment fitting (20). The existing antenna mounting bracket (20) is composed of a circular mast (21) having one end opened and the other end fixed to the building (24), and the existing antenna (22) is attached thereto. Note that when one end of the existing antenna mounting bracket (20) is opened, the cap is removed from the state where the opening end is covered with a cap (not shown) so that water does not enter, so that the cap is removed to make it open. Say.

The extension mast (11) includes a first shaft portion (11a) having an open end attached coaxially to the existing mast (21), and an extension antenna (13) substantially parallel to the first shaft portion (11a). ) and a second shaft portion fixable to (11b), has a third shaft portion connecting the first shaft portion and (11a) of the second shaft portion (11b), existing antenna (22) and The shaft of the first shaft portion (11a) and the shaft of the second shaft portion (11b) have a predetermined distance so that the additional antenna (13) has a positional relationship that does not interfere with each other. This interval is defined by the type and size of the existing antenna and the additional antenna.

  FIG. 4 shows a side view of three examples of extension masts.

  The shape is most preferably a substantially Z-shaped extension mast (11e) as shown in the drawing, but may be extension masts (11d) and (11f) whose connecting portions are not perpendicular.

  The fitting (12) includes a base (12a) that can be inserted into the open end of the existing mast (21) and an extension (12b) that can be inserted into the open end of the extension mast (11). 12a) has a base fixing means for fixing the existing mast (21). Furthermore, the vicinity of the opening end part of the extension mast (11) and the extension part (12b) of the joint fitting (12) have locking means (11c, 12c) that can be locked to each other.

  That is, the antenna extension metal fitting (10) of the present invention has the fitting metal fitting (12) attached to the end of the pipe portion of the existing mast (21) without removing the already-installed veranda attachment metal fitting or wall surface attachment metal fitting. The extension mast (11) is joined using the extension mast (11), and the extension antenna (13) is attached so as to extend the existing mast (21) upward. Since the pipe portion of the existing mast (21) is usually provided with a cap (not shown) so that water does not enter, the cap is removed and the fitting (12) of the present invention is inserted. Accordingly, the existing mast (21) may be a popular product as long as the inner diameter of the mast can be inserted into the fitting (12) and the fitting (12) can be fixed by the base fixing means. . That is, if several types of products having different outer diameters of the extension mast (11) and the fitting (12) according to the present invention in accordance with the inner diameter of the existing mast (21) are produced, it is possible for most existing masts (21). The antenna extension fitting according to the present invention can be used.

  The base fixing means is realized by the following structure. As shown in FIG. 3, for example, the joint fitting (12) includes a cylindrical body (14) having both ends opened and grooves (14 a) extending to both ends, and an extension side lid that is large enough to close the opening at one end. A plate (15), a side-side tapered base side cover plate (16), a base fixing bolt (17), a fixing bolt (18), and a rotation-preventing bolt (19) ). A through hole (15a) is formed in the center of the extension portion side cover plate (15), and a screw hole (16a) is formed in the center of the base portion side cover plate (16). The base fixing bolt (17) passes through the through hole (15a) of the extension side lid plate (15), passes through the body (14) in the axial direction, and is tightened into the screw hole (16a) of the base side lid plate (16). Put on. Accordingly, when the base fixing bolt (17) is rotated, the extension side cover plate (15) and the base side cover plate (16) are pressed against the body (14), and the tapered side surface of the base side cover plate (16). Expands the body (14) slightly in the radial direction, and the joint fitting (12) is fixed in pressure contact with the inner side of the existing mast (21). The groove (14a) reaching both ends of the joint fitting (12) is provided in this way for the base side cover plate (16) to expand the body (14), and if necessary, from the base side end to the center. You may provide several notches (14b) to the vicinity.

The locking means (11c, 12c) is realized by the following structure. For example, several radial fixing screw holes (14c) are provided in the body (14) of the joint metal fitting (12) and aligned with the fixing screw holes (14c), so that the first of the extension metal fitting (10) is provided. The shaft portion (11a) is provided with a fixing through hole, and the extension mast (11) and the fitting (12) are fastened by the extension mast fixing bolt (18) from the outside of the first shaft portion (11a). And fix. Further, for example, two rotation-preventing notches extending from the end of the first shaft portion (11a) are provided, aligned with the rotation-preventing notches, and the body (14) of the fitting (12). ) To prevent the rotation of the extension mast (11) and the fitting (12) from the outside of the notch by the rotation prevention bolt (19). Tighten as follows. The first shaft portion (11a) may be provided with several fixing through holes in the circumferential direction to facilitate the direction adjustment of the additional antenna (13). Further, the joint metal fitting (12) does not enter the deep part of the existing mast (21) by the rotation preventing bolt (19), and also functions to separate the base side and the extension side of the joint metal fitting (12).

By configuring the extension mast (11) with the first shaft portion (11a), the second shaft portion (11b), and the third shaft portion , the extension mast (11) can be lowered and shortened. Can do. Furthermore, the additional effect that the upper part of the existing antenna (22) can avoid colliding with the extension mast (11) was acquired.

  A method for using the antenna extension fitting of the present invention will be described below.

[1] In advance, the extension side lid plate (15) and the base side lid plate (16) are loosely tightened on the body (14) with the base fixing bolt (17), and the rotation prevention bolt (19) is turned. Loosely tighten the screw hole (14d) for preventing movement.

[2] Remove the cap (not shown) at the tip of the pipe portion of the existing mast (21).

[3] The base side of the fitting (12) is inserted into the opening of the existing mast (21). At this time, the rotation preventing bolt (19) hits the tip of the existing mast (21), and an appropriate insertion depth is naturally obtained.

[4] The joint fitting (12) is fixed to the existing mast (21) by tightening the base fixing bolt (17) of the joint fitting (12).

[5] Insert the extension mast (11) into the extension of the joint fitting (12). At this time, the rotation-preventing bolt (19) on the side surface of the joint fitting (12) is placed in the notch of the extension mast (11).

[6] The extension mast fixing bolt (18) is fastened to the fixing screw hole (14c) of the fitting (12) through the fixing through hole of the extension mast (11).

[7] The extension mast (11) is firmly fixed by firmly tightening the rotation-preventing bolt (19) and the fixing bolt (18).

[8] By rotating the extension mast (11) and freely changing the direction of the additional antenna (13) and adjusting the direction during the above, the appearance can be made as compact as possible.

  Even when the extension antenna (13) is changed, since the extension mast (11) is substantially Z-shaped, it can be easily adapted.

  By the above operation procedure, the antenna extension fitting (10) can be attached to the existing antenna attachment without removing the veranda attachment and the wall attachment, and the workability is very good.

  The shape and dimensions of the tubular extension mast of the present invention will be described with reference to the drawings.

  FIG. 5 is a side view and a plan view showing an embodiment with the antenna extension fitting of the present invention attached. Moreover, the relationship between a side view and a plan view is shown using auxiliary lines. In addition, some are shown transparent for illustration.

  As described above, when the existing parabolic antenna is placed upward so as to reach the maximum radio wave arrival angle, the portion where the radio wave arrives at the reflector of the existing parabolic antenna on the same horizontal plane as the additional antenna (in FIG. (Shown by hatching) is closest to the additional antenna.

  Therefore, as shown in FIG. 5, the extension mast is placed directly behind the existing parabolic antenna, and the parabolic antenna is in an upward state so as to reach the maximum radio wave arrival angle so that the additional antenna does not overlap with the radio waves of the parabolic antenna. If the shape and dimensions of the tubular extension mast are determined, the most practical tubular extension mast can be obtained.

  In addition, as shown in FIG. 5, if an extension mast is arranged, no matter how the orientation of the additional antenna is adjusted, it will not overlap the range of radio waves arriving at the reflector of the parabolic antenna. The direction of the additional antenna can be adjusted.

  If the parabola antenna and the extension antenna have different orientations and the extension mast and the converter arm cannot be arranged as shown in FIG. 5, the extension mast can be rotated 90 degrees in a preferred direction as shown in FIG. In the figure, two types are shown at the same time. In this case, the upper arrangement in the figure is adopted.) Alternatively, as shown in FIG. 7, the extension mast is rotated by 45 degrees or an arbitrary angle, and the orientation of the additional antenna is changed. adjust. Note that, as the reception point of the parabolic antenna becomes north, the range of incoming radio waves moves forward as shown in FIG. 6 and FIG.

  As described above, the shape and dimensions of the tubular extension mast are defined by the types and sizes of the existing antenna and the additional antenna.

It is a side view which shows one Example of the state which attached the antenna extension metal fitting of this invention. It is an assembly drawing which shows one Example of the state which attaches the antenna extension metal fitting of this invention. It is an assembly perspective view which shows a coupling metal fitting. It is the side view which showed three examples of the extension mast. It is the side view and top view which show one Example of the state which attached the antenna extension metal fitting of this invention. It is a top view which shows one Example of the state which attached the antenna extension metal fitting of this invention. It is a top view which shows one Example of the state which attached the antenna extension metal fitting of this invention. It is a side view which shows the state which attached the extension metal fitting to the mast of the existing antenna fixture with a prior art, and made the reflective mirror upward so that it might match with the radio wave arrival maximum angle.

Explanation of symbols

10 Antenna extension bracket 11, 11d, 11e, 11f Extension mast 11a First shaft portion 11b Second shaft portion 11c Locking means 12 Joint bracket 12a Base portion 12b Extension portion 12c Locking means 13 Additional antenna 14 Body 14a Groove 14b Cutting Notch 14c Fixing screw hole 14d Anti-rotation screw hole 15 Extension side cover plate 15a Through hole 16 Base side cover plate 16a Screw hole 17 Base fixing bolt 18 Fixing bolt 19 Anti-rotation bolt 20 Existing antenna fixture 21 Existing mast 22 Existing antenna 23 Wall mounting bracket 24 Wall surface

Claims (2)

One end opening, an antenna extension fitting the other end connected to the existing antenna mounting bracket comprising a fixed tubular mast building, the antenna extension fitting comprises a tubular extension mast, tube-like extension mast the existing consists of a joint fittings for connecting fixed to the antenna mounting bracket, the tubular extension mast, the second shaft portion and the first shaft portion, and the first shaft portion and a third connecting said second shaft portion made from the shaft, said first additional antenna to one end of the shaft portion can rotatably fixed one end of the second shaft portion to the other end of the first shaft portion is a distal end of the tubular extension mast There is connected via the third shaft portion, so as to open the other end of the second shaft portion is a rear end of the tubular extension mast, and to the one end abutting the existing antenna mounting bracket it has been, the existing antenna and the additional antenna inhibits the mutual As a positional relationship have has the first shaft portion and the interval and the predetermined second shaft portion and the tubular extension mast has a substantially Z-shape, the joint One end of the metal fitting is inserted and fixed in the other end opening of the tubular extension mast of the antenna extension metal fitting, the other end is inserted and fixed in the one end opening of the tubular mast of the existing antenna mounting metal fitting, and the tubular fitting is provided by the fitting metal fitting. An antenna extension bracket, wherein the extension mast is rotated and positioned relative to the tubular mast of the existing antenna mounting bracket. One end opening, an antenna extension fitting the other end connected to the existing antenna mounting bracket comprising a fixed tubular mast building, the antenna extension fitting comprises a tubular extension mast, tube-like extension mast the existing consists of a joint fittings for connecting fixed to the antenna mounting bracket, said tubular extension mast has a first shaft portion that can be rotatably fixed to the additional antenna to the end, parallel to an axis of the first, the and a second shaft portion having a tubular mast abutting the open end of the existing antenna mounting bracket such that said existing antenna and the additional antenna is a position relation does not inhibit each other, said first shaft portion and having said second shaft portion interval, the joint fitting, the existing antenna and one end opening to rotatably insertable base of the tubular mast mounting member, the open end of the tubular extension mast to rotatably Consists of a entrant extension portion, and the base has a base fixing means securable to the tubular mast of the existing antenna, the extension of the opening end and the joint fitting extension mast are mutually An antenna extension fitting having locking means that can be locked.

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