JP4920517B2 - Antenna replacement device - Google Patents

Description

  The present invention relates to an antenna exchanging device for attaching a gin pole above the side of a steel tower in order to exchange an antenna attached to the top of the steel tower.

  When the terrestrial television broadcasting shifts from the analog broadcasting to the digital broadcasting, a work is being performed to replace the antenna of the gain tower that transmits the radio waves for the television broadcasting from analog to digital. Such a gain tower has a structure in which an antenna is attached to the top of a steel tower, and a crane or the like is used for exchanging the antenna.

  However, in order to install a crane, it is necessary to secure a wide site around the gain tower. If such a site cannot be secured, it becomes a factor that makes it difficult to replace the antenna. In addition, it is necessary to stop the television broadcast during the replacement work, and it is required to complete the construction in a short time in order not to stop the television broadcast for a long time.

  Therefore, in order to perform antenna replacement work without using a crane or the like, a gin pole is attached to the steel tower of the gain tower, and the antenna is replaced using the gin pole or the like. In antenna replacement work using ginpoles, ginpole installation that does not affect the transmission of radio waves is performed during the daytime when television broadcasting cannot be stopped, and work that replaces the antenna itself that affects transmission of radio waves, etc. We go at night when broadcasting can be stopped.

  An antenna replacement device that replaces an antenna installed on the top of a steel tower without using a crane or the like is disclosed in Patent Document 1. In the structure of the antenna replacement device of Patent Document 1, a member for exchanging an antenna using this cableway is provided with a cableway formed in a bare state on the outside of the steel tower between the ground and the top of the steel tower. Is transported from the ground to the top of the tower. Specifically, a part of the new antenna is transported to the top of the tower by this cableway, a part of the new antenna transported is replaced with a part of the existing antenna, and the existing antenna removed by replacement is exchanged. The work is taken down to the ground by cableway. By repeating this operation until all parts of the existing antenna and the new antenna are replaced, the existing antenna is replaced with the new antenna.

  An antenna replacement device using a ginpole is disclosed in Patent Document 2. Patent Document 2 discloses a structure of a ginpole for installing a lightning rod on an antenna support column. The ginpole includes a pulley and a rope, and is bound by a band or a rope above the antenna support column. Being fixed. A rope is hung on the pulley, and a lightning rod is attached to one end of the rope. When the operator pulls the other end of the rope, the lightning rod is lifted upward.

JP-A-8-222923 JP 2005-318077 A

  However, in the antenna replacement device of Patent Document 1, the cableway constituted by the wire functions only for antenna conveyance and does not have a function for antenna installation. Therefore, it is necessary to separately prepare an apparatus having a function for carrying an antenna and a function for assembling an antenna. As a result, the number of work steps increases and the work time increases. In addition, all cableways are installed outside the steel tower, and if the cableway is flowed under the influence of the wind, it becomes difficult to control the conveyance of the antenna and the work accuracy is deteriorated.

  Moreover, in the antenna replacement apparatus of Patent Document 1, the space at the top of the steel tower for performing the antenna replacement work is limited to a very narrow size, making it difficult to install a large-scale apparatus.

  Furthermore, in the antenna replacement device of Patent Document 1, when performing an operation of replacing an existing antenna that affects transmission of radio waves with a new antenna, an operation of lowering the existing antenna once to the ground after removing the existing antenna is performed. Necessary. For this reason, the work time increases, and there is a possibility that the work of exchanging the antenna that affects the transmission of radio waves may take a long time.

  In addition, in the antenna replacement device of Patent Document 2, it is necessary to remove the band or the rope when raising and lowering the gin pole, and to bind the band again when fixing the gin pole to the antenna support pillar. For this reason, the number of work steps is increased, which is a factor that increases the work time.

  Therefore, an object of the present invention is to provide a ginpole structure that improves the efficiency of antenna replacement work and shortens the time for antenna replacement work.

  In order to solve the problem, the structure of the gin pole of the present invention is an antenna replacement apparatus in which a gin pole is attached above the side of the tower in order to replace the antenna attached to the top of the tower. The antenna wire for hanging the antenna is suspended from the arm, and the antenna wire is passed through the ginpole.

  The antenna wire may pass through the steel tower.

  A support member that is rotatable about a vertical axis may be attached to the top of the gin pole, and the arm may be attached to the support member.

  A transfer pole capable of temporarily installing the antenna may be provided at the top of the steel tower.

  A fixture for attaching the gin pole is attached to the steel tower, and the fixture is disposed so as to tighten the gin pole. The fixture is composed of a plurality of members, and the plurality of members are the gin poles. It may be assembled by fastening means so that the tightening to can be loosened.

  According to the present invention, the following effects can be obtained. The structure of the gin pole of the present invention is an antenna replacement device in which a gin pole is attached above the side of the tower in order to replace the antenna attached to the top of the tower, and an arm disposed on the top of the gin pole. The antenna wire for hanging the antenna is suspended from the arm, and the antenna wire is passed through the ginpole. Therefore, the antenna wires are concentrated inside the ginpole, and the antenna exchanging device can have both the antenna transfer function and the antenna installation function. Therefore, there is no need to separately prepare a device having a function for antenna conveyance and a device having a function for antenna installation, thereby reducing work man-hours, improving work efficiency, and shortening work time. . In addition, the antenna wire is housed inside the ginpole, and is less likely to be washed away even under the influence of wind, making it easier to control the transportation and assembly of the antenna, and improving work accuracy. Become.

  In the ginpole structure of the present invention, the antenna wire may pass through the inside of the steel tower, and the antenna wire is housed inside the steel tower and is flowed even when affected by wind. This makes it difficult to control the conveyance and installation of the antenna, and the working accuracy is improved.

  In the ginpole structure of the present invention, a support member that can be rotated about a vertical axis is attached to the top of the ginpole, and the arm may be attached to the support member, such as the top of the tower. Even in a space, the existing antenna can be transported onto the transfer pole without using a large transport device. Therefore, the antenna replacement work can be simplified and the work efficiency can be improved. In addition, after removing the existing antenna, it is possible to attach a new antenna without first lowering the existing antenna to the ground, so work efficiency from removing the existing antenna to installing the new antenna This makes it possible to reduce the work time that affects the transmission of radio waves.

  In the structure of the gin pole of the present invention, a transfer pole on which the antenna can be temporarily installed may be provided at the top of the steel tower, and an operation for replacing an existing antenna that affects radio wave transmission with a new antenna is performed. When performing, it becomes possible to perform the operation | work which attaches the said new antenna, without taking down the said existing antenna removed once on the ground. Therefore, the work time can be shortened.

  In the structure of the ginpole of the present invention, a fixture for attaching the ginpole is attached to the steel tower, the fixture is disposed so as to tighten the ginpole, and the fixture is composed of a plurality of members, The plurality of members may be assembled by fastening means so that the fastening to the gin pole can be loosened, and when the fixing tool is tightened, the gin pole is fixed to the steel tower, and the fixing tool When the tightening is loosened, the gin pole can be moved in the vertical direction of the steel tower. Further, by loosening the fastening means, it is possible to loosen the fastening of the fixture, and when the gin pole moves up and down, there is no need to perform the work of attaching or removing the parts for attaching the gin pole to the steel tower each time. In both cases, the ginpole can be fixed and released. Therefore, the work of moving the gin pole up and down is simplified, the working efficiency is improved, and the working time can be shortened.

  FIG. 1 is a front view of the gain tower 1 at the time of antenna replacement in the embodiment of the present invention, and the standing direction of the gain tower 1 is the vertical direction. As shown in FIG. 1, the gain tower 1 is mainly composed of a tower 2 and an existing analog broadcasting antenna (hereinafter referred to as an existing antenna) 3, and the existing antenna 3 is installed at the top 2 a of the tower 2. It is attached to the part 2b.

  The steel tower 2 has a substantially quadrangular pyramid shape extending in the vertical direction and having a cavity inside, and a ginpole 4 is attached above the first side surface portion 2 c of the steel tower 2. The ginpole 4 has a substantially quadrangular prism shape extending in the vertical direction and having a cavity inside. Further, the ginpole 4 can move up and down and is configured to be able to carry the existing antenna 3. A transfer pole 5 for temporarily installing the existing antenna 3 after being removed is attached to the steel tower 2. Moreover, the ginpole 4 is attached to the steel tower 2 by two fixing tools 6 and 6, and the two fixing tools 6 and 6 are arranged at intervals in the vertical direction. , Located near the top 2a of the tower 2.

  An antenna wire 7 is attached to the steel tower 2 and the ginpole 4, and a plurality of antenna pulleys 8 a, 8 b, and 8 c are arranged inside the steel tower 2 and below the installation position of the ginpole 4 with a space in the vertical direction. The antenna pulley 8b is located below the antenna pulley 8a, and the antenna pulley 8c is located below the antenna pulley 8b and in the vicinity of the ground G. An antenna winch 9 is disposed on the ground G.

  The antenna wire 7 extends through the ginpole 4, extends toward the lower portion of the tower 2 while being guided by the antenna pulleys 8a and 8b, and extends along the ground G by the antenna pulley 8c. To the antenna winch 9 installed on the ground G. Further, the other end of the antenna wire 7 is wound around the antenna winch 9.

  FIG. 2 is a front view of the gain tower 1 in a state where the ginpole 4 is lowered in the embodiment of the present invention, and a structure for moving the ginpole 4 up and down will be described with reference to FIG. A ginpole wire 10 is attached to the tower 2 and the ginpole 4, and ginpole pulleys 11 a, 11 b, 11 c, 11 d for guiding the ginpole wire 10 are spaced apart in the vertical direction inside the tower 2. The ginpole pulley 11a is arranged at the upper part of the steel tower 2, the ginpole pulley 11b is arranged below the ginpole pulley 11a, and the ginpole pulley 11c is arranged below the ginpole pulley 11b. The ginpole pulley 11d is disposed below the ginpole pulley 11c and in the vicinity of the ground G. A ginpole winch 12 is disposed on the ground G.

  One end of a ginpole wire 10 is attached to the lower part of the ginpole 4, the ginpole wire 10 extends upward from the lower part of the ginpole 4, and its direction is changed downward by the ginpole pulley 11 a, In addition, it extends toward the lower part of the tower 2 while being guided by the two ginpole pulleys 11b and 11c, and the direction is changed along the ground G by the ginpole pulley 11d to the ginpole winch 12. It is extended. The other end of the ginpole wire 10 is wound around a ginpole winch 12.

  The detailed structure of the ginpole 4 will be described with reference to FIG. 3A in which the portion A in FIG. 1 is enlarged and FIG. 3B in which the ginpole 4 is viewed from above. The ginpole 4 includes a support member 13 and an arm 14. The support member 13 extends in the vertical direction, is formed in a substantially columnar shape having a cavity therein, protrudes upward from the top 4a of the ginpole 4, and is rotatably attached. The arm 14 is formed in a substantially quadrangular prism shape having a cavity inside, the base end portion 14a side of the arm 14 is attached to the support member 13, and the tip end portion 14b side of the arm 14 is formed as a free end, from the base end portion 14a. The posture extends obliquely upward to the tip portion 14b. Moreover, the support member 13 and the arm 14 are mutually connected inside the attachment location.

  Further, a proximal end pulley 15 is provided inside the attachment portion between the support member 13 and the arm 14, and a distal end pulley 16 is provided at the distal end portion 14 b of the arm 14. In addition, a wire attachment portion 17 that protrudes downward is disposed at the distal end portion 14 b of the arm 14.

  Next, details of the antenna wire 7 disposed in the ginpole 4 will be described. One end of the antenna wire 7 is attached to the antenna wire attachment portion 17, and the antenna wire 7 extends downward from the antenna wire attachment portion 17. Next, the middle part of the antenna wire 7 is hung on the movable pulley 18 and the direction thereof is changed upward, and the antenna wire 7 extends upward.

  The antenna wire 7 is hung on the front end pulley 16, changed in direction along the longitudinal direction of the arm 14, passes through the inside of the arm 14, hung on the proximal end pulley 15, and the support member 13. The direction is changed so as to extend along the longitudinal direction of the support member 13 and extends through the support member 13.

  A mounting structure between the movable pulley 18 and the existing antenna 3 will be described. The movable pulley 18 is connected to the existing antenna 3 via a hook 19 and a connecting wire 20. The hook 19 hangs from the position of the rotation center of the movable pulley 18, the connecting wire 20 is wound around the existing antenna 3, and both ends of the connecting wire 20 are attached to the hook 19.

  Referring to FIG. 4A in which the portion B in FIG. 2 is enlarged and FIG. 4B in which the tower 2 is viewed from above with the antenna removed, a structure in which the existing antenna 3 is temporarily installed. explain. Specifically, the transfer pole 5 is formed in a substantially cylindrical shape extending in the vertical direction, and is attached to the second side surface portion 2 d of the steel tower 2. The top 5a of the transfer pole 5 has a shape in which the existing antenna 3 after the replacement work can be temporarily installed. Further, the transfer pole 5 and the antenna installation portion 2b of the tower 2 are arranged on the same circumference around the rotation axis of the support member 13, and the top portion 5a of the transfer pole 5 is the antenna installation portion 2b. It is almost the same height.

  The structure of the fixture 6 will be described with reference to FIG. 5 showing the CC cross section of FIG. The first side surface portion 4 b of the ginpole 4 is in contact with the first side surface portion 2 c of the steel tower 2, and the second side surface portion 4 c, the third side surface portion 4 d and the fourth side surface portion 4 e of the ginpole 4 are surrounded by the fixture 6. .

  The fixture 6 includes a first component member 61, a second component member 62, and a third component member 63. The cross-sectional shape of the first component 61 includes a main body portion 61a extending along the second side surface portion 4c of the ginpole 4 and an attachment portion extending substantially perpendicularly from the one end of the main body portion 61a in a direction away from the ginpole 4. 61b and a connecting portion 61c that forms the other end of the main body 61a are formed in a substantially L-shaped cross section. The cross-sectional shape of the second component member 62 includes a main body portion 62a having a shape corresponding to the third side surface portion 4d of the gin pole 4, and a connecting portion 62b extending substantially vertically from the both ends of the main body portion 62a in a direction away from the gin pole 4. , 62b, and a substantially U-shaped cross section. The cross-sectional shape of the third component 63 includes a main body portion 63a having a shape corresponding to the fourth side surface portion 4e of the ginpole 4, and an attachment portion 63b extending substantially perpendicularly to a direction away from the ginpole 4 at one end of the main body portion 63a. And a connecting portion 63c that forms the other end of the main body portion 63a.

  The mounting portion 61b of the first component member 61 is in contact with the first side surface portion 2c of the steel tower 2 and is fastened by a bolt 64, a nut 65, and the like, and the main body portion 61a of the first component member 61 is the second side surface of the ginpole 4. The connection portion 61c of the first component member 61 is in contact with the portion 4c, and is in contact with one connection portion 62b of the second component member 62 and fastened by a bolt 64, a nut 65, and the like. The main body portion 62a of the second component member 62 contacts the third side surface portion 4d of the ginpole 4, and the other connecting portion 62b of the second component member 62 contacts the connecting portion 63c of the third component member 63 to contact the bolt 64, Fastened with a nut 65 or the like. The main body 63a of the third component 63 abuts on the fourth side surface 4e of the ginpole 4, and the connecting portion 63c of the third component 63 abuts on the first side surface 2c of the tower 2 so that the bolt 64, the nut 65, etc. It is concluded by.

  An antenna replacement operation using the antenna replacement apparatus described above will be described. First, preparation work that does not affect the transmission of radio waves is performed in the daytime. The first side surface portion 4b of the gin pole 4 is brought into contact with the upper portion of the first side surface portion 2c of the steel tower 2, and the top portion 2a of the steel tower 2 and the top portion 4a of the gin pole 4 are arranged at substantially the same height. The ginpole 4 is fastened by the fixture 6 and fixed to the steel tower 2. Further, the ginpole wire 10 attached to the lower part of the ginpole 4 is attached to the ginpole pulleys 11 a, 11 b, 11 c, 11 d and installed so as to be wound up by the ginpole winch 12. Further, the transfer pole 5 is attached to the upper portion of the second side surface portion 2 d of the steel tower 2.

  Next, antenna replacement work that affects transmission of radio waves is performed at night. The fastening of the fixture 6 fixing the ginpole 4 is loosened, the ginpole wire 10 is wound up by the ginpole winch 12, and the ginpole 4 is lifted upward. After lifting the arm 14 of the ginpole 4 to a height above the existing antenna 3, the fixture 6 is tightened again to fix the ginpole 4.

  The fixing tool 6 can be tightened by loosening fastening means such as bolts 64 and nuts 65. When the ginpole 4 is moved up and down, components for attaching the ginpole 4 to the tower 2 are attached each time. Alternatively, the ginpole 4 can be fixed and released without performing the work of removing. Therefore, the up / down movement of the ginpole 4 is simplified, the working efficiency is improved, and the working time can be shortened.

  Thereafter, the antenna wire 7 attached to the ginpole 4 is attached to the antenna pulleys 8 a, 8 b and 8 c and installed so as to be wound up by the antenna winch 9.

  For this reason, the antenna wire 7 is accommodated inside the steel tower 2 and the ginpole 4, and is difficult to flow even under the influence of wind. Furthermore, it becomes easy to control the conveyance and installation of the antenna, and the working accuracy is improved.

  Next, the distal end portion 14 b of the arm 14 is rotated so as to be positioned above the existing antenna 3. The movable pulley 18 is suspended from the tip 14 b of the arm 14, and the movable pulley 18 and the existing antenna 3 are connected by the hook 19 and the connecting wire 20. The state where the existing antenna 3 is fixed to the steel tower 2 is released, the antenna wire 7 is wound up by the antenna winch 9, the movable pulley 18 is lifted upward, and the existing antenna 3 is lifted. From the state where the existing antenna 3 is lifted, the arm 14 is rotated to convey the existing antenna 3 to a position above the transfer pole 5.

  Therefore, even in a narrow space such as the top 2a of the steel tower 2, the existing antenna 3 can be transported onto the transfer pole 5 without using a large transport device. Therefore, the antenna replacement work can be simplified and the work efficiency can be improved.

  The antenna wire 7 is unwound from the antenna winch 9, the moving pulley 18 is lowered, and the existing antenna 3 is lowered onto the top 5a of the transfer pole 5 and temporarily installed.

  Therefore, when replacing the existing antenna 3 that affects radio wave transmission with a new digital broadcast antenna (hereinafter referred to as a new antenna) 21, the removed existing antenna 3 is once lowered to the ground. Thus, it is possible to perform the work of attaching the new antenna 7. Therefore, the work time can be shortened.

  After temporarily installing the existing antenna 3, remove the movable pulley 18 from the existing antenna 3, loosen the fixture 6 again, and again arrange the top 2 a of the tower 2 and the top 4 a of the ginpole 4 at substantially the same height, The fixing tool 6 is tightened to fix the ginpole 4 again. Here, the night work is once completed.

  Again, do the preparatory work in the daytime that does not affect the transmission of radio waves. The moving pulley 18 is lowered to the ground, and the hook 19 and the connection to the tip 21a of the new antenna 21 are connected in the same manner as the attachment of the existing antenna 3 and the moving pulley 18 shown in FIGS. 3 (a) and 3 (b). The moving pulley 18 is attached via the wire 20 for use.

  Here, FIG. 6 which showed the operation | work which conveys the novel antenna 21 to the top part 2a of the steel tower 2 is referred. An intervening rope 22 is attached to the base end portion 21 b of the new antenna 21. The movable pulley 18 is raised to convey the new antenna 21 to the top 2a of the tower 2.

  Therefore, the antenna wire 7 is concentrated inside the ginpole 4, and the antenna exchange device can have both the antenna transfer function and the antenna installation function. Therefore, it is not necessary to separately prepare a device having a function for carrying an antenna and a device having a function for installing an antenna, thereby reducing work man-hours, improving work efficiency, and shortening work time. .

  During the conveyance, the new antenna 21 is held by the intervening rope 22 so that the base end portion 21b of the new antenna 21 is not easily shaken by wind or the like. Although not shown, after the new antenna 21 is transported to the vicinity of the top 2 a of the tower 2, the new antenna 21 is temporarily installed in the vicinity of the first side face 2 c of the tower 2. Here, the daytime work is terminated, and the new antenna 21 is attached at nighttime.

  Again, the antenna that affects the transmission of radio waves is replaced at night. The fastening of the fixture 6 that fixes the ginpole 4 is loosened, the ginpole wire 10 is wound up by the ginpole winch 12, and the ginpole 4 is lifted upward again. After the arm 14 of the ginpole 4 is lifted above the existing antenna 3, the fixture 6 is tightened again to fix the ginpole 4.

  The tip 14b of the arm 14 is rotated so as to be positioned above the new antenna 21. The movable pulley 18 is suspended from the tip 14 b of the arm 14, and the movable pulley 18 and the new antenna 21 are connected by the hook 19 and the connecting wire 20. The state where the new antenna 21 is temporarily installed on the tower 2 is released, the antenna wire 7 is wound up by the antenna winch 9, the movable pulley 18 is lifted upward, and the new antenna 21 is lifted.

  From the state in which the new antenna 21 is lifted, the arm 14 is rotated to convey the new antenna 21 to above the antenna installation portion 2 b of the tower 2. The antenna wire 7 is unwound from the antenna winch 9, the moving pulley 18 is lowered, and the new antenna 21 is lowered and fixed to the antenna installation portion 2b. In this state, the new antenna 21 can be used, and the night work is completed.

  The temporarily installed existing antenna 3 is then removed and lowered to the ground.

  As another embodiment of the present invention, the steel tower 2 may have a shape other than a substantially quadrangular pyramid, and the ginpole 4 may have a shape other than a substantially quadrangular prism. Further, the shape of the fixture 6 may be changed corresponding to the shapes of the steel tower 2 and the ginpole 4, and two or more fixtures 6 may be used. In various types of gain towers, the antenna can be exchanged.

  The number of the antenna pulleys 8a, 8b, 8c and the ginpole pulleys 11a, 11b, 11c, 11d can be changed as appropriate, and the antenna pulleys 8a, 8b, 8c and the ginpole pulleys 11a, 11b, 11c can be changed. , 11d can be partially or fully shared. Furthermore, the antenna winch 9 and the ginpole winch 12 can be shared. By sharing the above parts, it is possible to reduce the number of parts, reduce the number of work steps for installation, and improve the work efficiency. As a result, the cost can also be reduced.

It is a front view of the gain tower during the antenna exchange work in the embodiment of the present invention. It is a front view of the gain tower in the state where the gin pole in the embodiment of the present invention is lowered and installed. (A) It is the A section enlarged view of FIG. (B) It is a top view of Fig.3 (a). (A) It is the B section enlarged view of FIG. (B) It is a top view of Fig.4 (a) in the state which removed the antenna. It is CC sectional drawing of FIG. It is a front view of the gain tower during the conveyance work of the novel antenna in the embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gain tower 2 Steel tower 2a Top part 2b Antenna installation part 2c 1st side surface part 2d 2nd side surface part 3 Existing analog broadcasting antenna (existing antenna)
4 Gin pole 4a Top part 4b First side part 4c Second side part 4d Third side part 4e Fourth side part 5 Transfer pole 5a Top part 6 Fixing tool 7 Antenna wires 8a, 8b, 8c Antenna pulley 9 Antenna winch 10 Ginpole wire 11a, 11b, 11c, 11d Ginpole pulley 12 Ginpole winch 13 Support member 14 Arm 14a Base end portion 14b Tip portion 15 Base end pulley 16 Tip portion pulley 17 Wire attachment portion 18 Moving pulley 19 Hook 20 For connection Wire 21 New digital broadcasting antenna (new antenna)
21a distal end 21b proximal end 22 intermediate rope

61 1st component 61a Main part 61b Attachment part 61c Connection part 62 2nd component 62a Main part 62b Connection part 63 3rd component 63a Main part 63b Attachment part 63c Connection part 64 Bolt 65 Nut

G ground

Claims (5)

In order to replace the antenna attached to the top of the tower, in the antenna replacement device in which a gin pole is attached above the side of the tower,
An antenna exchange comprising an arm disposed on the top of the ginpole, wherein an antenna wire for hanging an antenna is suspended from the arm, and the antenna wire is passed through the ginpole. Equipment.   The antenna replacement device according to claim 1, wherein the antenna wire passes through the steel tower.   The antenna replacement device according to claim 1, wherein a support member capable of rotating about a vertical axis is attached to a top portion of the gin pole, and the arm is attached to the support member.   The antenna replacement device according to any one of claims 1 to 3, wherein a transfer pole capable of temporarily installing the antenna is provided at a top of the steel tower.   A fixture for attaching the gin pole is attached to the steel tower, and the fixture is disposed so as to tighten the gin pole. The fixture is composed of a plurality of members, and the plurality of members are the gin poles. The antenna replacement device according to any one of claims 1 to 4, wherein the antenna replacement device is assembled by fastening means so as to be able to be loosened.

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