JP2003347820A - Lighting-protecting structure of antenna unit, and the antenna unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antenna unit lighting protecting structure which is easy to mount and maintain. <P>SOLUTION: In an antenna unit 2 to be mounted on a mounting member 5 by interposing a support fitting 13 between the antenna unit 2 and the mounting member 5, the antenna unit is structured of an antenna 3 integrated with a communication apparatus 4. The lightning-protecting structure includes, on the top of a radome for the antenna 3, a lightning-protecting unit provided with support arms to hold the lightning-protecting unit on the radome top by sandwiching. The antenna unit 2 is fitted with the mounting member 5 by the support fitting 13, and at the same time, the lightning-protecting unit of the antenna unit 2 can be mounted. <P>COPYRIGHT: (C)2004,JPO

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna device mainly installed in a high-rise building such as a building, and more particularly to a lightning protection structure of the antenna device.

[0002]

2. Description of the Related Art Conventionally, in an antenna device of this type, as shown in FIG. 11, a mounting member 5 composed of a columnar pole or a tower-like structure is attached to a mounting member 111 for adjusting the antenna direction. , 112 via the antenna unit 102
The antenna unit 102 and the communication device 103 are connected via a cable 104 for transmitting a high-frequency signal. Further, the communication device 103 includes an antenna unit 102.
Although it may be installed indoors away from the installation location,
When it is desired to suppress the transmission loss caused by the cable 104, the communication device 103 is attached to the installation member 10 and the cable 104 is connected.
Was shortened. In order to protect these antenna devices from lightning damage, lightning rods are separately installed near the antenna devices.

[0003]

However, the cable 104 needs to be lengthened to some extent so that the length of the cable 104 does not become short within the movable range when the direction of the antenna unit 102 is adjusted. Even in such a configuration, the loss of a communication signal between the antenna unit 102 and the communication device 103 cannot be sufficiently suppressed. For example, in a transmission device that transmits a signal in a UHF to SHF band having a large transmission loss in a cable from an antenna, There is a problem that it is difficult to secure transmission power from the antenna unit 102.

[0004] In other words, for example, in the past, broadcast waves transmitted from ground stations or artificial satellites that broadcast radio or television cannot be directly received (for example, in urban areas where mountainous areas or high-rise buildings are lined up, or in tunnels, etc.). )), A transmitting antenna for retransmitting the broadcast wave is installed in the area, and a signal received from a receiving antenna installed in a place where the broadcast wave can be received is transmitted to the transmitting antenna. A system for retransmitting radio waves from a transmission antenna is known.

[0005] In this type of system, the output of a transmitter used as a communication device is increased in order to widen the range (service area) in which a transmission radio wave from the transmission antenna can reach, and a large amount of power is transmitted from the transmission antenna. I try to transmit radio waves. However, in the related art, the loss of a transmission signal generated between a transmitter and a transmission antenna cannot be sufficiently suppressed, and a sufficient service area cannot be covered due to a decrease in transmission power from the transmission antenna. It was.

In such a system, in order to secure transmission power from the transmission antenna, the output of the transmitter itself may be increased in consideration of the loss in the cable. A large output power must be used for the constituent signal output elements.
In addition, power consumption, that is, the amount of heat generated by the transmitter increases, so that it is necessary to increase the size of the fins for cooling. Therefore, there is a problem that the size of the transmitter increases and the cost increases. Also, when the size of the transmitter is increased, the easiness of installation and maintenance of the transmitter is impaired.

In order to prevent such a problem, it has been conceived to incorporate a function of a communication device (transmitter, receiver, etc.) into a feeding portion of the antenna and to integrate the antenna with the communication device. However, installation on the two antenna mounting members 111 and 112 for adjusting the direction of the antenna, one for the upper side and the other for the lower side, is required. Furthermore, there is also a problem that the installation work at a higher place is required due to the two mounting members.

Further, the mounting member for adjusting the direction of the antenna serves both to adjust the direction of the antenna and to fix the antenna. For example, when the antenna is removed for maintenance or the like and then installed again, it is necessary to adjust the direction of the antenna again. In this respect, the ease of installation and maintenance was also a problem.

Furthermore, in order to protect these devices from lightning damage, when installing lightning rods and the like in the vicinity of these devices, the installation locations and heights are restricted, and installation work at higher places is required. This is a necessity, and the easiness of installation is also a problem in this respect. In addition, installation members such as lightning rods are required in addition to those for the antenna, and there is a problem that the cost is increased.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a lightning arrester structure of an antenna device in which an antenna device is integrally provided with a lightning arrester. Another object is to process a received signal from the receiving antenna in a system that receives a transmitted signal transmitted from another antenna device by a receiving antenna and retransmits the received signal to an area where the received signal does not reach. The present invention is to provide an antenna device used for transmitting from a transmitting antenna. Another object is to provide an antenna device that can sufficiently suppress signal transmission loss occurring between an antenna unit and a communication device. Another object is to provide an antenna device having an antenna device in which an antenna unit and a communication device are integrated. Another object of the present invention is to provide an antenna device in which an antenna unit in which an antenna unit and a communication device are integrated can be easily attached to a supporting device interposed between the antenna device and a member for installation. Another purpose is
An object of the present invention is to provide an antenna device and a support device, wherein the antenna device and the support device have a structure that can be temporarily fixed. Another object of the present invention is to provide a support device for an antenna device that can be safely mounted at a high place because the antenna device can be attached to the support device below the antenna device. Another object of the present invention is to provide a supporting device for an antenna device in which the direction of the antenna device can be accurately adjusted at every predetermined angle. Another object of the present invention is to provide an antenna device support device capable of adjusting the direction of an antenna without mounting the antenna device. Another object of the present invention is to provide a supporting device for an antenna device that can fix the antenna device to the supporting device while the direction of the antenna device is accurately adjusted. Another object of the present invention is to provide a support device for an antenna device that can maintain a state in which the direction of the support device is adjusted even when the antenna device is removed from the support device.

[0011]

In order to solve the above-mentioned problems, a first aspect of the present invention is to provide a support member between a rod-shaped antenna device and an installation member, and to connect the antenna device to the installation member. In the antenna device to be attached to the antenna device, a lightning rod is provided at the tip of the antenna device.

According to a second aspect of the present invention, the antenna device comprises:
In a system for receiving a transmission signal transmitted from a wireless communication device by a reception antenna and retransmitting the reception signal to an area where the transmission radio wave does not reach, a wireless communication device for transmitting a reception signal from the reception antenna It is configured to be used for an antenna.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a transmitting antenna of a radio communication apparatus according to the present invention; A wireless communication device 1 shown in FIG. 1 is an antenna device 2 including an antenna unit 3 and a communication device 4.
And an installation member 5, a support device 13 for attaching the antenna device 2 to the installation member 5, and a lightning arrester 50. In the example illustrated as the installation member 5,
It is a hollow tubular support. Next, the antenna device 2 will be described. The antenna device 2 includes an antenna unit 3 and a communication device 4. An antenna device 2 constituting the wireless communication device 1 of the present application receives a transmission radio wave (for example, from a ground station or an artificial satellite) transmitted from another wireless communication device by a reception antenna, and transmits the reception signal to a transmission line. In a system for retransmitting to an area where the transmission radio wave does not reach (e.g., a mountain area, a city center where high-rise buildings are lined up, or in a tunnel), a reception signal from the reception antenna is processed and transmitted from the antenna apparatus. This is the antenna device used for the gap filler in the example illustrated in the present application. The antenna section of the present application is an example, and the type of antenna is not limited. Further, the present invention is not limited to a transmitter exemplified as a communication device, and may be an electronic device such as a preamplifier.

Next, the communication device 4 will be described with reference to FIGS. The received signal is input to the input terminal 7 of the communication device 4 via the cable 6. The input signal is appropriately processed and transmitted from the antenna unit 3. The operating power of the communication device 4 is supplied via the cable 6. The case 8 of the communication device 4 has a substantially rectangular parallelepiped shape, and is formed of, for example, an aluminum material. At least one substantially rivet-shaped columnar body 9 comprising a head 9a, a shaft 9b, and an abutment 9c protrudes from one side surface 8a of the case 8 below the side surface 8a. The contact portion 9c of the columnar body 9 is provided above the side surface 8a.
At least two support pillars 10 are formed at the same height as the above. Further, stop portions 18 and 19 of the support device (described in detail later) are provided on the upper surface 8b and the lower surface 8c of the case 8 which are in longitudinal contact with the side surface 8a of the case 8.
And fastening portions 11 and 12 provided with fastening holes so that fastening can be performed by the fastening screws 11a and 12a.

Next, FIG. 1 and FIG.
It will be described based on. The lightning arrester 50 includes a lightning arrester 51 and a support bracket 52. The lightning arrester 51 includes a lightning arrester 53, a conductor mounting portion 54, and a support portion 55. One end of the conducting wire 56 is attached to the conducting wire mounting portion by a fixing screw 54a, a flat washer 54b,
It is fixed with a spring washer 54c and a nut 54d. The other end of the conductor 56 is grounded. Bolt insertion holes 57 and 58 are formed in the support portion 55.

The support fitting 52 is provided on the radome 6 of the antenna section 3.
5 and the lightning arrester 51. A bent portion 52a is formed as shown in FIG. 2, and an upper end of the bent portion 52a is attached to a tip of the antenna device 2. A locking piece 52b is provided. In the board surface 52c of the support fitting 52, the bolt insertion holes 5 are provided at positions opposing the bolt insertion holes 57 and 58 of the support portion 55.
9, 59 and 60, 60 are formed. The bolt insertion hole 60 is a long groove that draws an arc with the bolt insertion hole 59 as a center point. The support portion 55 of the lightning arrester 51 can rotate relative to the support fitting with the bolt insertion hole 59 as a pivot point. The contact angle can be adjusted by tightening and loosening bolts and nuts described later.

Further, bolt insertion holes 61, 61,... Are formed on the substrate surface 52d so as to oppose each other while holding the radome 65 of the antenna unit 3 therebetween. Each of the bolt insertion holes is provided with a bolt 6 from one of the support fittings 52 side.
, And flat washers 62a, 62a, ..., spring washers 62b, 62b, ..., and nuts 62c, 62c, on the other support bracket 52 side.
The antenna unit 3 and the lightning arrester 51 are fixed by. Next, the conducting wire 56 is supported by the mounting base 63 mounted on the antenna device 2 and the support 5 and is grounded to the ground.
Although the support portion 55 is formed of a resin material in the embodiment of the present invention, a metal body or the like may be used.

Next, the support device 13 will be described with reference to FIGS.
This will be described with reference to FIGS. The support device 13 includes a base 14 having a U-shaped cross section and having both side plates 14a, 14a,
4 comprises a fixing plate 15 pivotally attached to a pivot point and a pressing plate 16 for the installation member 5 assembled so as to be able to be pressed by a bolt tightening operation. The bottom plate 14 b of the base 14 is provided with a darma hole 17 at a position facing the columnar body 9 formed in the antenna device 2. Stop portions 18 and 19 are formed at upper and lower ends of the bottom plate portion 14b in a direction opposite to the opening side of the base 14. The communication device 4 is attached to the stop 18 at the upper end.
A fastening hole 18a is provided at a position opposite to a fastening hole provided on the upper surface 8b of the case 8. Further, the bottom end 8c of the case 8 of the communication device 4 is attached to the stop 19 at the lower end.
A fastening hole 19a is provided at a position facing the fastening hole provided at the bottom end, and a perimeter of the toe 19
b is formed.

Next, an M-shaped fixing plate 15 is assembled to the base 14 so as to face the opening side of the base 14. One is on the upper part of both side plate parts 15a, 15a of the fixed plate 15 and two is on the lower part.
And screw holes 20 are provided, respectively,
In the upper and lower portions of both side plates 14a, 14a, bolt insertion holes 21, 2 are provided at positions corresponding to the screw holes 20.
2 and 23, and the bolt insertion holes 21 and 23 are arc-shaped long grooves centered on the bolt insertion hole 22 near the center of the two bolt insertion holes drilled below. . The fixing plate 15 can be fixed with bolts by aligning the screw holes with the base 14, and the fixing plate 15 can be loosened by tightening the bolts so that the pivot point is centered on the base 14. , The angle of elevation can be adjusted by relative rotation. Both side plate portions 15 of the fixed plate 15
a, 15a are formed with horizontal planes 15b, 15b at the bent portions, and screw holes 24, 24.
・ Is formed. As another example of the screw hole 20, the screw hole 20 is a bolt insertion hole, the fixing plate 15 and the base 14 are fixed by a combination of the bolt and the nut, and the tightening of the bolt and the nut is loosened to raise the elevation angle. An adjustment method may be used.

Next, a method of adjusting the elevation angle will be described in detail with reference to FIGS. In the figure, reference numeral 25 denotes a first angle adjusting hole provided in the side plate 14a of the base 14. The first angle adjusting holes 25 are provided with the movable range of the elevation angle in the bolt insertion holes (long grooves) 21 and 23 equal to the number (N) divided by a certain angle, which is one less (N−1). In the embodiment of the present invention, for example, the adjustment range of the elevation angle of the support device 13 is set to 0 to −10 ° (the reference is 0 ° when the directivity is oriented in the horizontal direction), and the adjustment range is set to 1 °.
°, the first angle adjustment hole 25
Are provided (9-1), and are arranged with the pivot point as a center point. This serves to position the base 14 at the time of elevation angle adjustment, which will be described later. In the vicinity of the first angle adjustment hole, an elevation angle adjustment scale is displayed by a stamp or a label. ing.

The side plate 15a of the fixed plate 15 which is in contact with the side plate 14a provided with the first angle adjusting hole 25 has a second plate having the same number and the same diameter as the first angle adjusting hole 25.
The angle adjusting hole 26 is formed in the longitudinal direction parallel to the bent portion of the side plate portion 15a of the fixed plate 15. The positional relationship between the first angle adjusting hole 25 and the second angle adjusting hole 26 is such that when the base 14 is tilted to adjust the elevation angle of the base 14, the first angle Any one of the adjustment holes 25 and any one of the second angle adjustment holes 26 are opposed to each other with the axes of the respective holes being common, and the remaining first angle adjustment holes 25 and the second The angle adjusting hole 26 is configured so that the axis of the hole is displaced.

That is, in the above example, the elevation angle adjustment range is 0
Since the first angle adjusting hole 25 is provided so that the number of divisions becomes 1 degree step at -10 °, the first angle adjusting hole 25 is provided on the side plate 1 of the base 14 as shown in FIG.
From the side closer to the center point of the pivot point in 4a, 25a is -1 °, 25b is -2 °... 2 with respect to the reference (0 °).
5i indicates -9 [deg.] (Directivity gradually goes down from the horizontal direction). The second angle adjustment hole 2
6 are also provided in the same number as the first angle adjusting holes, and 26a, 26b,... 26i are provided from the side closer to the center point of the pivot point on the side plate portion 15a of the fixed plate 15. . Therefore, as shown in FIG. 8, when it is desired to incline the base 14 by, for example, −4 °, the base 14 is moved.
Simply moving to the position where the axis of the first angle adjustment hole 25d and the axis of the second angle adjustment hole match (the result is that the matched second angle adjustment hole becomes 26d),
In addition, the elevation angle can be accurately adjusted to -4 °. The reference (0 °) is shown in FIG.
10 °), as shown in FIG.
The angle can be adjusted by contacting the ends of the bolt insertion holes (long grooves) 21 and 23 in the swing direction.

Furthermore, the first substrate 14
A stop member 27 is provided near the angle adjusting hole 25 as shown in FIG. The stop member 27 is made up of a stopper 27a and a connecting means 27b.
d is attached with a fastening screw 27c. The stopper 27a is formed so that the diameter of the shaft portion is slightly smaller than the diameter of the first angle adjusting hole 25 and the diameter of the second angle adjusting hole 26, and when the angle of the base 14 is adjusted as described above. First
The elevation angle of the antenna device 2 can be temporarily and accurately fixed by inserting the angle adjustment hole 25 and the second angle adjustment hole 26 where the axes of the angle adjustment hole 26 coincide with each other. In addition, the fastener 27a allows the antenna device 2 not only to tighten the bolt while maintaining an accurate elevation angle, but also allows the elevation angle to be adjusted only by the support device 13 even before the antenna device 2 is mounted. Efficiency is also improved.

In the embodiment of the present invention, the elevation angle adjustment range is set to 0 to 0.
Although the adjustment step is set to -10 ° and the adjustment step is set to 1 °, it may be changed as needed. Also, an example has been shown in which the number of the angle adjustment holes 25 and 26 is reduced by one from the number obtained by equally dividing the elevation angle adjustable range into necessary steps, but the present invention is not limited to this example. In the example of the present application, a female screw is formed in one of the first angle adjusting hole 25 and the second angle adjusting hole 26, and a male screw is formed in a shaft portion of the metal fitting 27a. Even safer work can be achieved by screwing the screws.

16 is a pair of the support plate 5 and the fixing plate 15.
As shown in FIGS. 4 and 6, the periphery is bent in the direction of the fixed plate 15 to provide rigidity. The upper and lower bent portions 16a have a shape in which the top of a triangle is cut off in a semicircular shape, and the cutout surface is formed in a sawtooth shape. The screw holes 24, 24 of the fixing plate 15 are provided on the substrate surface 16b.
The bolt insertion holes 28, 28,... Corresponding to... Are formed, and the bolts 29 inserted into the bolt insertion holes 28, 28,. The holding plate 16 can be attached to the fixing plate 15. When the holding plate 16 is pressed against the fixing plate 15 by screwing the bolt 29, the inclined surfaces on both sides of the vertically bent portion 16a of the holding plate match the V-shaped surface of the fixing plate 15, and the horizontal surface 15b of the fixing plate 15 A gap P is secured between the pressing plate 16 and the pressing plate 16.

The hanger 30 is incorporated in the gap P. The hanger 30 is, as shown in FIG.
Support arms 30b are formed at both ends of the support arm 30b.
The lower end of Ob is provided with a bolt insertion hole 31 as a bolt insertion portion, and the locking bar 30a is bent in a horizontal bow shape and is integrally formed of a metallic material (for example). The hanger 30 thus formed is disposed between the fixing plate 15 and the holding plate 16, and the bolt 29 is inserted into the bolt insertion hole 31.
When the holding plate is pressed against the fixed plate by screwing in the bolts by loosely inserting the bolts, the support arm is settled in the gap P secured between the horizontal surface of the fixed plate and the holding plate, and only the locking bar is Is exposed along the upper surface of the bent portion of the holding plate.

Next, an example of attachment to the column 5 is shown in FIGS.
6 will be described. First, the four bolts 29 are loosened to secure a space between the fixing plate 15 and the holding plate 16 in which the column 5 can be inserted. Then, the support 5 is inserted into the space. When the support 5 is fixed to the upper end of the support 5, the antenna device 2 is locked at a position where the locking bar 30 a of the hanger 30 is hooked on the upper end of the support 5. If you do this,
Even if the hand is released, the antenna device 2 does not fall, and the mounting work of the antenna device 2 can be easily performed.

In the case where the support 5 is mounted at an intermediate position,
As shown in FIG. 5, if a space is provided between the fixing plate 15 and the holding plate 16 so that the support column 5 can be inserted, the hanger 30 can move along the bolt 29.
The finger is applied to the support arm 30b and shifted toward the holding plate 16 so that the support bar 5 can be penetrated so that the support bar 30a does not interfere with the insertion of the support 5 so that the support hanger 30 can be penetrated.
It is also possible to mount without using. So we moved,
Even when the position is changed from the upper end of the column 5 to the middle or vice versa due to the movement of the installation location, the hanger 30 can be freely selected by adjusting the position of the hanger 30.

The hanger 30 according to the embodiment of the present invention is made of a metallic material (for example, a hot-dip galvanized iron plate) and has a locking bar 30a curved in an arc shape.
The locking bar 30a does not need to be curved as long as the hanger 30 is not disturbed when the hanger 30 is displaced. Further, the material of the hanger 30 is not limited to the above embodiment, and may be formed of, for example, a synthetic resin material. Next, the support device 13 thus attached can be carefully adjusted in orientation with both hands. While maintaining the orientation, the bolt 29 is lightly tightened and temporarily fixed to perform the next operation or If the angle can be accurately determined, the bolt 29 may be tightened and firmly fixed to the column 5.

Next, the direction of the elevation angle is adjusted. The elevation angle can be adjusted by moving the base 14 so that the base 1 is moved as described above.
Of the first angle adjusting hole 25 provided on the side surface 14a of the fourth member 4 and the axis of the adjusting hole on which a desired elevation angle is displayed, and the second
The angle adjustment hole 26 can be easily provided by aligning the first angle adjustment hole with an adjustment hole whose axis coincides with the first angle adjustment hole.
At this time, the stopper 27a of the stopper 27 is
The first angle adjusting hole 25 and the second angle adjusting hole 26
The angle of elevation can be accurately maintained by inserting the lens through the hole. And
Next, the bolt may be lightly tightened to temporarily fix the base, and the next operation may be performed. Alternatively, if the elevation angle can be accurately determined, the bolt may be tightened and firmly fixed to the fixing plate 15.

Next, the antenna device 2 is connected to the support device 13.
The method of attaching the device will be described with reference to FIGS. Case 8 of communication device 4 constituting antenna device 2
On one side surface 8a of the support device 13, at least one substantially rivet-shaped columnar member 9 is protruded from the side of the support device 13 opposite to the bottom plate portion 14b of the base member 14 as described above. The body 9 includes a head 9a, a shaft insertion portion 9b, and a contact portion 9c. Next, the head 9a of the column 9 is inserted into a dharma hole 17 provided at a position opposite to the column 9 of the bottom plate 14b of the base 14, and the antenna device 2 is inserted into the bottom plate 14b. Press down along. At this time, since the darma hole 17 is formed such that the small-diameter hole is lower than the longitudinal direction of the bottom plate portion 14b, the shaft portion 9b of the columnar body 9 is The antenna device is locked in the small-diameter hole and the diameter of the head 9a of the columnar body 9 is formed slightly larger than the small-diameter hole of the daruma hole 17. 14b is securely locked. At the same time, the bottom-side fastening portion 12 provided on the case 1 and the lower end portion 19 provided on the bottom plate portion 14b are configured to come into contact with each other. Since the perimeter 19b is formed, the antenna device 2 can be easily temporarily placed on the support device 13, so that the antenna device 2 does not fall even if the user releases his hand, and a safe mounting operation can be realized.

Next, a fastening screw 12a is attached to a fastening hole 19a provided in the lower end stopping portion 19 and a fastening hole provided in the bottom side fastening portion 12. Further, a fastening hole 18a provided in the upper end stopping portion 18 and the upper surface side fastening portion 11 are provided.
After the fastening screw 11a is attached to the fastening hole provided in the antenna, the fastening screws 11a and 12a are completely tightened, and the antenna device 2 is connected to the antenna device 2 via the contact portion 9c and the support pillar 10. The support device 13 is firmly fixed to the base 14.
The antenna device 2 thus attached to the support device 13
After the direction of the antenna device is adjusted as described above,
By tightening the temporarily fixed bolts, the support device 13 and the antenna device 2 can be firmly fixed easily, accurately, and safely. Also, as a feature of the present application, by adjusting the elevation angle before fixing the antenna device to the support device, the operation can be started immediately when the antenna device is attached. Furthermore, when fine adjustment of the elevation angle is required, there is also an advantage that the setting operation can be efficiently performed by first setting the target angle with the angle adjustment hole as described above and then performing the fine adjustment.

It should be noted that the present invention is not limited to the above-described embodiment, and may be carried out by appropriately changing the shape and arrangement of each part without departing from the spirit of the present invention. In addition, the use example of the antenna for the support device of the present application is not limited to the wireless communication device described as the use example, and may be used for another antenna. Furthermore, it goes without saying that the communication device integrated with the antenna unit may include an electronic device such as a receiving preamplifier.

[0034]

As described above in detail, according to the first aspect of the present invention, the antenna device is attached to the installation member by interposing the support device between the rod-shaped antenna device and the installation member. In the antenna device thus configured, since a lightning rod is provided at the tip of the antenna device, first, when the antenna device is attached to the support device, the columnar body is inserted through the locking hole. The antenna device can be temporarily fixed to the support device. Next, after temporary fixing, the antenna device is fixed to the support device with bolts and the like, and a lightning arrester is provided at the tip of the antenna. And lightning arrester can be installed at the same time. In addition, since the mounting position of the antenna device and the support device is provided below the antenna device, there is no mounting member for the upper side as in the related art, and the installation work can be performed at a lower position. It is possible to provide a lightning arrester structure of the antenna device which is excellent also in terms of installation work safety.

According to the second aspect of the present invention, the antenna device receives the transmission signal transmitted from the radio communication device by the reception antenna, and retransmits the reception signal to an area where the transmission radio wave does not reach. In the system, since it is an antenna for a wireless communication device that transmits a reception signal from the receiving antenna, the antenna is not used for installation work in a high-rise building such as a high-rise building where the wireless communication device is installed. Since the installation of the lightning arrester is completed simultaneously with the installation of the antenna, it is possible to provide an antenna device having both ease of installation and safety.

[Brief description of the drawings]

FIG. 1 shows an example of an embodiment of an antenna device according to the present invention.

FIG. 2 is an exploded perspective view showing an example of an embodiment of a lightning arrester for an antenna device according to the present invention.

FIG. 3 is a fragmentary sectional view showing a procedure for attaching the antenna device to the support device.

FIG. 4 shows a top view when a support device is attached to the tip of a support.

FIG. 5 shows a side view when a supporting device is attached in the middle of a support.

FIG. 6 is an explanatory view showing a disassembled support device.

FIG. 7 is a view showing the first state when the elevation angle of the support device is set to 0 °.
It is the schematic which shows the positional relationship of the angle adjustment hole of 2nd, and the 2nd angle adjustment hole.

FIG. 8 is a schematic diagram showing a positional relationship between a first angle adjustment hole and a second angle adjustment hole when the elevation angle of the support device is set to −4 °.

FIG. 9 shows a case where the elevation angle of the support device is set to −10 °.
It is the schematic which shows the positional relationship of a 1st angle adjustment hole and a 2nd angle adjustment hole.

FIG. 10 is a detailed explanatory view of a stop member.

FIG. 11 is a schematic diagram showing a conventional antenna device.

FIGS. 12A and 12B are detailed explanatory views of FIG. 2, wherein FIG. 12A is an enlarged view of a main part of a locking portion of a columnar body, and FIG. Show.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Wireless communication apparatus, 2 ... Antenna apparatus, 3 ... Antenna part, 4 ... Communication equipment, 5 ... Installation member (for example, support | pillar), 6 ...
Cable, 7 input terminal, 8 case, 8a side, 8
b: top side, 8c: bottom side, 9: columnar body, 9a: head,
9b: Shaft portion, 9c: Contact portion, 10: Support column, 11: Top side fastening portion, 11a: Fastening screw, 12: Bottom side fastening portion, 1
2a: fastening screw, 12b: fastening hole, 13: support device, 1
4 Base, 14a Side plate, 14b Bottom plate, 15 Fixed plate, 15a Side plate, 15b Horizontal plane, 16 Press plate, 1
6a: bent portion, 16b: substrate surface, 17: daruma hole, 18
... upper end part, 18a ... fastening hole, 19 ... lower end part, 1
9a: fixing hole, 19b: locking piece, 20: screw hole, 21: bolt insertion hole (long groove), 22: bolt insertion hole, 23: bolt insertion hole (long groove), 24: screw hole, 25: first Angle adjusting holes (25a, 25b,... 25n), 26 second angle adjusting holes (26a, 26b,... 26n), 27 stopping member, 27a stopping fitting, 27b connecting means, 27c fastening. Screw 27d Clamping tool 28 Bolt insertion hole 29 Bolt 30 Hanger 30a Locking bar 30b Support arm 31 Bolt loose insertion hole 50 Lightning arrester 51 Lightning arrester Reference numeral 52: support bracket, 52a: bent portion, 52b: locking piece, 52c: substrate surface, 52d: substrate surface, 53: lightning rod,
Reference numeral 54: lead wire attaching portion, 54a: fastening screw, 54b: flat washer, 54c: spring washer, 54d: nut, 55: support portion, 56: lead wire, 57: bolt insertion hole,
58: bolt insertion hole, 59: bolt insertion hole, 60: bolt insertion hole (long groove), 61: bolt insertion hole, 62: bolt, 62a: flat washer, 62b: spring washer, 62c: nut, 63: mounting Stand, 64 ... building,
65: radome, 102: antenna unit, 103: communication device, 104: cable, 111, 112: mounting member for antenna direction adjustment, P: gap

Claims (2)

[Claims] 1. An antenna device wherein a supporting device is interposed between a rod-shaped antenna device and an installation member so that the antenna device is attached to the installation member. A lightning arrester structure for an antenna device, provided with a lightning rod. 2. The antenna device according to claim 2, wherein the transmission signal transmitted from the wireless communication device is received by a reception antenna, and the reception signal is retransmitted to an area where the transmission radio wave does not reach. An antenna device for a wireless communication device transmitting a reception signal from the reception antenna.