JPH08204417A - Antenna - Google Patents

Abstract

(57) [Abstract] [Purpose] The antenna installation work is extremely easy and can be done by one person, and the antenna element is prevented from falling to the ground during the installation work or due to weather. [Arrangement] An arm fixing fitting 23 provided on the upper end of a column and formed with a plurality of radially extending arm fixing ribs 32, and one end of each arm fixing rib of the arm fixing fitting. A mounting arm 25 that is fixed and has an antenna element provided at the other end, and at the time of mounting the mounting arm, one end opening thereof is provided on the side surface of the head projection of the arm fixing bracket 23 for positioning. The mounting arm is temporarily fixed by inserting it into the projection 34 and locking the positioning locking holes 45 and 46 provided in the mounting arm with the positioning claw portions 35 and 36 provided in the arm mounting rib. At this time, the main fixing bolts 36 and 37 face the screw holes 41 and 42 of the arm mounting rib. The mounting arm is finally stopped by tightening the final stop bolt.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna in which antenna elements are radially attached to a support.

[0002]

2. Description of the Related Art In an antenna of this type, one end of a mounting arm with an antenna element attached to the other end is fixed to the arm with the antenna element attached to the other end in order to attach the antenna element at a predetermined distance in a radial pattern. It is fixed to the metal fittings.

Conventionally, such an arm fixing metal fitting for an antenna has a boss portion 3 which can be inserted into an upper end portion of a column 2 as shown in FIGS. 7 and 8, and a radial portion 4 extending from the boss portion 3. The book includes an arm attachment rib 4 and a cap-shaped head 5 provided on the upper portion of the boss portion 3 so as to project from the upper surface of the arm attachment rib 4.

The arm mounting rib 4 is provided with two screw holes 6 and 7 for bolts which are spaced apart from each other, and at the ends of the mounting arms 8 there are bolt through holes 9 and 10.
Are provided through.

Each mounting arm 8 is attached to the arm fixing fitting 1.
When mounting, one end of the mounting arm 8 is placed on the upper surface of the arm mounting rib 4. And the arm mounting rib 4
The bolt through holes 9 and 10 are positioned at the positions opposite to the bolt screw holes 6 and 7. In this state, the bolts 11 and 12 were passed through the bolt holes, and the mounting arms 8 were fastened and fixed to the arm fixing fitting 1.

[0006]

However, in such an antenna, since the mounting arm 8 is simply tightened and fixed to each arm mounting rib 4 of the arm fixing metal fitting 1 by the bolt, the arm fixing is fixed. Since it becomes necessary to adjust the perpendicularity of the mounting arm 8 with respect to the metal fitting 1, the mounting arm 8
There was a problem that it was not easy to position.

In particular, since the antenna mounting work is often carried out at a high place, the mounting work and the angle adjusting work are not a good foothold. For this reason, a worker who manually guides the mounting arm 8 to which the antenna element is mounted to the arm mounting rib 4 of the arm fixing metal fitting 1, and the other bolts 11 and 12 are inserted into the mounting arm 8 for tightening. There is a problem that an operator who performs the work is required and the antenna installation work cannot be performed by one person.

Since the antenna is installed in a high place where it is exposed to strong wind and rain, it may be vibrated by wind for a long period of time.
12 may become loose and the mounting arm 8 to which the antenna element is mounted may fall to the ground.
Until the tightening work of 12 is completed, the mounting arm 8 may be accidentally dropped to the ground, and it is necessary to prevent these.

Therefore, according to the present invention, the antenna installation work can be carried out very easily, and moreover, the installation work can be carried out by one person. Further, during the installation work and the wind and rain, the antenna element may drop to the ground. It is intended to provide an antenna that can be prevented.

[0010]

SUMMARY OF THE INVENTION The present invention is a mounting and fixing device comprising a support column and a plurality of protrusions which are provided on the upper end of the support column and laterally project laterally with respect to the support column. A member and a tubular member having one end fixed to each overhanging portion of the mounting and fixing member and the other end extending in the direction of each overhanging portion having an antenna element provided, , A head projection formed on the head so as to project upward from a tubular member mounting surface of each overhang, and a side surface of the head projection in the extending direction of each overhang. Positioning protrusion provided so that the opening at one end of the tubular member can be inserted, the fixing bolt hole provided at each projecting portion of the mounting and fixing member, and the projecting portion of each projecting portion of the mounting and fixing member. The tubular member mounting surface is provided with a positioning claw portion, and the tubular member is provided on the mounting surface of one end of the tubular member to the mounting fixing member. The positioning locking holes that can be locked to the positioning claws of the mounting and fixing member and the positioning locking holes when the positioning locking holes are locked to the positioning claws of the mounting fixing member And a fixing bolt provided at a position facing the fixing bolt hole of the member.

[0011]

In the present invention having such a structure, when the tubular member provided with the antenna element is attached to the mounting / fixing member, one end opening of the tubular member is inserted into the positioning protrusion of the mounting / fixing member. , Place the attachment fixing member on the attachment surface of the overhanging portion. Then, the positioning locking hole of the tubular member is locked to the positioning claw portion of the protruding portion. Then, the tubular member is temporarily fixed to the attachment fixing member, and the fixing bolt of the tubular member faces the fixing bolt hole of the protruding portion. By tightening the fixing bolt, the tubular member is finally fixed to the attachment fixing member.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an external configuration of an antenna according to the present embodiment, and 21 is a column attached to an installation surface 22. A lightning rod 24 is vertically attached to the head of the column 21 via an arm fixing member 23.

As shown in FIG. 2, one end of each of four mounting arms 25 is attached to the arm fixing member 23, and the other ends are formed in a cross shape in a radial direction toward the side of the support column 21. It is extended. At the tip of each mounting arm 25, an antenna element 26 is mounted vertically with a mounting bracket 27.
Is installed through.

The electric wires 28 connected to the antenna elements 26 are connected to the wiring boxes 29 attached to the columns 21, respectively, and are connected to the antenna cords of connected devices such as transceivers in the wiring boxes 29.

Specifically, as shown in FIGS. 3 to 5, the arm fixing member 23 is a boss portion 31 which can be inserted into the upper end portion of the column 21, and a radial portion 4 extending from the boss portion 31. The book includes an arm attachment rib 32 and a cap-shaped head projection 33 provided on the upper portion of the boss portion 31 so as to project from the upper surface of the arm attachment rib 32. The arm fixing fitting 23 may be made of metal, plastic, or the like and has strength enough to hold the mounting arm 25 and the antenna element 26.

The head projection 33 of the arm fixing bracket 23 has a positioning projection 3 for positioning the end of the mounting arm, which projects radially from the side surface of the head projection 33 in the same direction as the arm mounting rib 32.
4 are provided. The positioning protrusion 34 may be integrally formed with the arm fixing fitting 23, or another member may be fixed by screwing or the like.

The positioning projection 34 is attached to the mounting arm 25.
A gap X is provided from the mounting surface A of the arm mounting rib 32 so that the opening at one end can be easily inserted. That is, the clearance X is set so that the inner thickness of the tube of the mounting arm 25 can be inserted without difficulty when the mounting arm 25 is inserted into the positioning projection 34 obliquely from above as shown in FIG. 6A. . The positioning projection 34 may have a round shape, a rectangular shape, or the like as long as the mounting arm 25 can be inserted.

In the middle of each arm mounting rib 32,
On the mounting surface A of the arm mounting rib 32, two locking claws 35 and 36 protruding upward from this surface are provided separately. The locking claws 35 and 36 are for positioning or temporarily fixing the mounting arm 25 to the arm mounting rib 32.

Further, screw holes 41, 42 for screwing the main fixing bolts 37, 38 for fixing the mounting arm 25 to the arm mounting ribs 32 are provided in the middle of the arm mounting ribs 32. It is provided penetrating downward.

The mounting arm 25 has a square cross section,
It is formed in a tubular shape. The mounting arm 25 is made of metal or plastic. The mounting arm 25
The material is not limited to the above as long as the material has a strength capable of holding the antenna element 26.

The shape of the mounting arm 25 is not limited to a square shape, a round shape, a polygonal shape, or the like, but in view of construction and economy, a square pipe is preferable.

At one end of the mounting arm 25, a through hole 4 for loosely inserting the main fixing bolts 37 and 38 of the mounting arm 25 is provided.
3,44 are provided. The two fixing bolts 37, 38 are previously inserted into the through holes 43, 44 in the mounting arm 25 before the antenna is installed. When the mounting arm 25 is mounted, the fixing bolts 37, 38 are removed. In order to prevent this, bolt stop washers 47, 48 are attached to the inner portions of the attachment arms 25 of the main fixing bolts 37, 38.

Positioning locking holes 45, 46 for inserting and locking the locking claws 35, 36 of the arm mounting rib 32 are formed on the mounting surface of the mounting arm 25. . Reinforcing U-shaped plates 49 are attached to the tightening portions of the mounting arms 25 of the bolts 37, 38 for final fixing, and the bolts 37, 38 for final fixing are tightened via the reinforcing U-shaped plate 49. The reinforcing U-shaped plate 49 may be omitted if the mounting arm 25 has a sufficient thickness.

In this embodiment having such a structure, when the mounting arm 25 is mounted on the arm fixing fitting 32, the one end opening of the mounting arm 25 is mounted obliquely from above as shown in FIG. 6 (a). The rib 32 is inserted into the positioning protrusion 34.

Subsequently, the mounting arm 25 is moved in the direction of the solid line arrow B in the figure to be horizontal with respect to the arm mounting rib 32, and the positioning locking holes 45 and 46 are formed in the arm mounting rib 32. Fit into the locking claws 35 and 36. Then, as shown in FIG.
As shown in (b), the fixing bolts 37 and 38 are inserted into the screw holes 41 and 42 of the arm mounting rib 32.

In this way, the mounting arm 25 is temporarily fixed to the arm mounting rib 32. That is, the fulcrum reaction force of the lower portion of the positioning protrusion 34 of the arm attachment rib 32 is a bending moment and a fishing force generated in the direction of a solid arrow B shown in FIG. 6A due to the weight of the attachment arm 25 and the weight of the antenna element. It will fit.

Next, the main fixing bolts 37, 38 are tightened and fixed in the screw holes 41, 42 of the arm mounting rib 32. Thus, the mounting arm 25 has the arm mounting rib 32.
The book is stopped by. By repeating this operation and finally fixing each mounting arm 25 to the arm mounting rib 32, the mounting of the mounting arm 25 to the arm fixing fitting 32 is completed.

As described above, the mounting arm 25 is obliquely inserted into the positioning projection 34 of the arm mounting rib 32 and is fitted into the locking claws 35 and 36, so that positioning and temporary fixing can be easily performed. It can be performed. As a result, the mounting arm 25 for the arm fixing fitting 23 is different from the conventional one.
It is possible to eliminate the need to adjust the squareness θ and the holding of the mounting arm 25. Therefore, even in a work situation such as a bad footing, one worker can easily perform the mounting work.

Further, the locking hole 4 for positioning the mounting arm 25
5, 46 are locking claw portions 35, 36 of the arm mounting rib 32.
By fitting the bolts 37, 38 into the screw holes 41, 42 of the arm mounting rib 32, the fixing bolts 37, 38 are inserted. As a result, it is possible to eliminate the need for adjusting the position of the mounting arm 25 while checking the insertion sites of the main fixing bolts 37 and 38 as in the conventional case. Therefore, the mounting arm 25 to which the antenna element 26 is mounted is attached to the main fixing bolts 37, 3
It is possible to mount the mounting arm 25 safely and reliably without dropping it on the ground during the tightening work of 8.

Further, at the inner portions of the mounting arms 25 of the main fixing bolts 37, 38, bolt stop washers 47, 48 are provided.
By mounting the mounting arm 25, it is possible to prevent the bolts 37, 38 for final fixing from coming off when the mounting arm 25 is mounted.

Further, by forming the locking claw portions 35 and 36 at two places on the installation surface of the mounting arm 25 of the arm mounting rib 32, the accuracy of the mounting angle θ of the mounting arm 25 can be further improved. it can.

Further, the bolt 3 for final fixing of the mounting arm 25
Since the reinforcing U-shaped plate 49 is attached to the tightening portions of 7, 38, it is possible to prevent the pipe of the mounting arm 25 from being depressed due to the tightening of the main fixing bolts 37, 38.

The mounting arm 25 is temporarily fixed to the arm mounting rib 32, and the fulcrum reaction force of the lower portion of the positioning protrusion 34 of the arm mounting rib 32 depends on the weight of the mounting arm 25 and the weight of the antenna element. In order to balance the bending moment generated in the direction of the solid arrow B shown in FIG. It is possible to prevent the mounting arm 25 from falling even if the loosening of the mounting arm 25 occurs.

In this embodiment, four antenna elements 26 are fixed to the arm fixing fitting 32 via the mounting arm 25, but three or less antenna elements 26 or five or more antenna elements 26 are used. It may be attached to the arm fixing fitting 32 via the attachment arm 25. In this case, the arm fixing metal fitting 32 may be provided with the arm attaching ribs 32 and the positioning protrusions 34 as many as the number of the antenna elements 26, and the arm attaching ribs 32 may be provided with the locking claws 35 and 36. .

The more antenna elements 26 are mounted on the arm fixing fitting 32, the more important the mounting angle is in terms of appearance. Therefore, the effect of eliminating the need to adjust the mounting angle is great. Further, the greater the number of antenna elements 26, the greater the effect of shortening the mounting time.

[0036]

As described above in detail, according to the present invention, the one end opening of the tubular member is inserted into the positioning projection of the mounting and fixing member, and the positioning locking hole of the tubular member is extended. By locking to the positioning claw portion of the projecting portion, the fixing bolt can be temporarily fixed in a state of facing the fixing bolt hole, so that the tubular member can be easily positioned. As a result, the antenna installation work can be performed very easily.

Further, since the positioning work of the tubular member can be omitted, one person can perform the installation work of the antenna. Also, since the tubular member is firmly temporarily fixed to the mounting and fixing member by the positioning claws and the positioning protrusions, even if the fixing bolt is loosened during installation work or due to wind and rain, the antenna element will be grounded. It can be prevented from falling.

[Brief description of drawings]

FIG. 1 is a front view showing an external configuration of an antenna according to an embodiment of the present invention.

FIG. 2 is a top view showing the external configuration of the antenna according to the embodiment.

FIG. 3 is an enlarged view showing a configuration of an arm fixing fitting shown in FIG.

FIG. 4 is a front view showing the configuration when the mounting arm is not attached to the arm fixing fitting shown in FIG.

5 is a front view showing the configuration when the mounting arm is attached to the arm fixing fitting shown in FIG.

FIG. 6 is a view for explaining the operation of the same embodiment.

FIG. 7 is a top view illustrating an external configuration of a conventional antenna.

FIG. 8 is a side view illustrating an external configuration of a conventional antenna.

[Explanation of symbols]

 21 ... Strut 23 ... Arm fixing metal fitting (mounting fixing member) 25 ... Mounting arm (cylindrical member) 26 ... Antenna element 32 ... Arm mounting rib (overhanging portion) 33 ... Head projection 34 ... Positioning projection 35, 36 ... Locking claws (positioning claws) 37, 38 ... Final fixing bolts (fixing bolts) 41 ... Screw holes (fixing bolt holes) 45, 46 ... Positioning locking holes

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masahiko Ozawa 1406 Hasunuma, Omiya-shi, Saitama Yagi Antenna Co., Ltd. Omiya Plant (72) Inventor Kazuo Uezawa 1406 Hasunuma, Omiya-shi, Saitama Yagi Antenna Co., Ltd. Omiya Plant, Yagi Antenna Co., Ltd.

Claims (1)

[Claims] 1. A column and a top end of the column,
A mounting and fixing member having a plurality of bulging portions radially bulging laterally with respect to the support column, and one end fixed to each bulging portion of the mounting and fixing member, and the direction of each bulging portion. A tubular member provided with an antenna element at the other end extending to the mounting fixing member, the mounting fixing member protruding upward from the tubular member mounting surface of each of the overhanging portions at its head. A head projection formed and a positioning projection projecting from the side surface of the head projection in the extending direction of each of the overhanging portions and provided with an opening at one end of the tubular member. A fixing bolt hole provided in each overhanging portion of the mounting and fixing member, and a positioning claw portion formed on the tubular member mounting surface of each overhanging portion of the mounting and fixing member, The tubular member is provided on a mounting surface of one end portion of the tubular member to the mounting and fixing member, and is locked to a positioning claw portion of the mounting and fixing member. Locating locking hole and a position that is opposed to the fixing bolt hole of the mounting fixing member when the positioning locking hole is locked to the positioning claw portion of the mounting fixing member. An antenna characterized in that it is provided with a fixing bolt.