Patent Publication Number: US-2017352940-A1

Title: Installation bracket

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of International Application No. PCT/EP2015/054043, filed on Feb. 26, 2015, the disclosure of which is hereby incorporated by reference in its entirety. 
    
    
     TECHNICAL FIELD 
     The present invention relates to an installation bracket. 
     BACKGROUND 
     When installing Telecom Equipment, such as antennas, antennas with integrated radio units or even complete radio base stations including antennas, on installation poles, the most commonly used conventional solution has been to mount the Telecom Equipment on the side of the installation pole using equipment holders attached to the outer side of the installation pole. 
     Another more recent conventional solution is to install the Telecom Equipment on top of a installation pole, i.e. “top of pole installation of Telecom Equipment”, by that a part of a holder unit for the Telecom Equipment unit is inserted from above around the outside of the installation pole or into an upwards open cavity at the top end of the installation pole, several holes are drilled through this part of the holder unit and the therein or therearound situated part of the installation pole, whereafter several locking screws are inserted in the respective holes thus locking the Telecom Equipment to the installation pole. 
     The problem with the above conventional solutions for “top of pole installation of Telecom Equipment” is that for each specific installation pole with a specific shape and specific dimensions, an equipment holder unit with the corresponding specific shape and dimensions has to be manufactured. 
     SUMMARY 
     An objective of embodiments of the present invention is to provide a solution which solves the drawbacks and problems of conventional solutions. 
     The above objectives are solved by the subject matter of the independent claim. Further advantageous implementation forms of the present invention can be found in the dependent claims. 
     According to a first aspect of the invention, the above mentioned and other objectives are achieved with an installation bracket, comprising: 
     a top plate unit configured to be positioned at the top end of a tubular element, and 
     a clamping device coupled to the top plate unit; 
     wherein the clamping device is configured to be clamped against the inner wall of the tubular element thereby fixing the installation bracket to the tubular element in its clamping state. 
     A tubular element in this disclosure should be understood as a hollow elongated element having e.g. a cylindrical, oval, rectangular or polygonal cross-section shape, and where the cross-section dimension is substantially equal along or alters along the tubular element, i.e. e.g. a cylindrical or conical tube used as a installation pole or installation tower for e.g. telecom equipment for e.g. a wireless communication system. 
     Examples of telecom equipment configured to be mounted on the tubular element are e.g. antennas, antennas with integrated radio units, and complete radio base stations including antennas. 
     Further, the expression “clamping state” in this disclosure should be understood as a state in which the clamping device is clamped against the inner wall of the tubular element. 
     An advantage with this first aspect is that it is possible to provide a solution which supports use of the one and the same installation bracket, comprising a clamping device, for different tubular elements having different inner and outer diameters and shapes, i.e. a use on a wide range of inner and outer diameter dimensions for tubular elements. Therefore, there is no need to manufacture a separate installation bracket with the corresponding specific shape and dimensions of each specific tubular element. 
     Further advantages with this first aspect are that no holes have to be drilled in the tubular element on the installation site or have to be prefabricated into the tubular element before installation, no externally visible fixing bolts are needed thus supporting flush appearance between the tubular element and the equipment configured to be mounted on the installation bracket, azimuth adjustment of telecom equipment configured to be mounted on the tubular element is supported during installation and maintenance of the installation bracket, and self locating secure mounting of the installation bracket to the tubular element is supported both on vertical and inclined tubular elements. 
     In a first possible implementation form of an installation bracket according to the first aspect, the installation bracket further comprises a locating arrangement coupled to the top plate unit, wherein the locating arrangement is configured to position the top plate unit in or on the tubular element. 
     An advantage with this implementation form is that it is possible to position the top plate unit in or on different tubular elements having different inner and outer diameters and shapes. Therefore, there is no need to manufacture a separate top plate unit with the corresponding specific shape and dimensions of each specific tubular element. 
     In a second possible implementation form of an installation bracket according to the first implementation form of the first aspect, the locating arrangement comprises at least three locating devices configured to position the top plate unit in or on the tubular element. 
     An advantage with this implementation form is that it is possible to position the top plate unit at a preferred position in tubular elements having different inner and outer shapes. 
     In a third possible implementation form of an installation bracket according to the second implementation form of the first aspect, the at least three locating devices are configured to be releasably locked to the top plate unit, and further configured to position the top plate unit in or on the tubular element when abutting against the inner wall of the tubular element in the locked state of the respective locating device. 
     An advantage with this implementation form is that it is possible to unlock the locating devices if necessary e.g. during maintenance. 
     In a fourth possible implementation form of an installation bracket according to the third implementation form of the first aspect, the respective locating device is in its unlocked state configured to be displaceable in a respective slot in the top plate unit towards and away from the inner wall of the tubular element. 
     An advantage with this implementation form is that it is possible to adjust the position of the respective locating device without completely removing it from the top plate unit. 
     In a fifth possible implementation form of an installation bracket according to any of the above implementation forms of the first aspect or the first aspect as such, the clamping device comprises at least three clamping units configured to abut against the inner wall of the tubular element in the clamping state of the clamping device. 
     An advantage with this implementation form is that it is possible to use of the one and the same clamping device for different tubular elements having different inner and outer diameters and shapes. Therefore, there is no need to manufacture a separate clamping device with the corresponding specific shape and dimensions of each specific tubular element. 
     In a sixth possible implementation form of an installation bracket according to the fifth implementation form of the first aspect, the installation bracket further comprises a clamping actuator mechanism, wherein the clamping units are configured to be displaceable towards and away from the inner wall of the tubular element by operation of the clamping actuator mechanism. 
     An advantage with this implementation form is that it is possible to remotely adjust the position of the clamping units. 
     In a seventh possible implementation form of an installation bracket according to the sixth implementation form of the first aspect, the clamping actuator mechanism comprises a clamping actuator screw configured to control the movement of the clamping units towards and away from the inner wall of the tubular element. 
     An advantage with this implementation form is that it is possible to control the movement of the clamping units in a continuously variable way, and thus use of the one and the same installation bracket for different tubular elements having different inner and outer diameters and shapes. Therefore, there is no need to manufacture a separate installation bracket with the corresponding specific shape and dimensions of each specific tubular element. 
     In an eighth possible implementation form of an installation bracket according to the seventh implementation form of the first aspect, a thread arranged on the clamping actuator screw is configured to pass through, and interact with a corresponding thread in, a threaded hole in the top plate unit. 
     An advantage with this implementation form is that it is possible to control the movement of the clamping units in a continuously variable way from the outside of the tubular element. 
     In a ninth possible implementation form of an installation bracket according to the seventh or eighth implementation form of the first aspect, the clamping actuator mechanism further comprises a clamping unit retainer device and a clamping unit guide device, where the respective clamping unit is pivotally mounted on the clamping unit retainer device, where the clamping unit retainer device is configured to move axially together with the clamping actuator screw when the clamping actuator screw is turned around its axis, and where the clamping unit guide device is immovably fixed to the top plate unit. 
     An advantage with this implementation form is that it is possible to control the movement of the clamping units in a well defined continuously variable way. 
     In a tenth possible implementation form of an installation bracket according to the ninth implementation form of the first aspect, the clamping unit guide device has a corresponding slot for each clamping unit, where each slot is closed at the end opposite to the position of the top plate unit, where each clamping unit is configured to abut against the clamping unit guide device at the respective closed end of the respective corresponding slot during operation of the clamping actuator screw, where each slot is configured to run in parallel with the axis of the clamping actuator screw, and where the walls of each slot are configured to control the movement of the respective clamping unit along the axis of the clamping actuator screw when the clamping actuator screw is turned around its axis. 
     An advantage with this implementation form is that it is possible to control the movement of the clamping units in well defined directions. 
     In an eleventh possible implementation form of an installation bracket according to the ninth or tenth implementation form of the first aspect, the clamping unit guide device is configured to be immovably fixed to the top plate unit by that a clamping screw sleeve is immovably fixed at one end to the top plate unit and immovably fixed at the other end to the clamping unit guide device. 
     An advantage with this implementation form is that it is possible to control the movement of the clamping units without the risk for internal angular displacements within the installation bracket. 
     In a twelfth possible implementation form of an installation bracket according to the eleventh implementation form of the first aspect, the clamping actuator screw is configured positioned within the clamping screw sleeve. 
     An advantage with this implementation form is that the surface of the clamping actuator screw is protected by the clamping screw sleeve. 
     In a thirteenth possible implementation form of an installation bracket according to any of the above seventh to twelfth implementation forms of the first aspect, the clamping actuator screw is configured to be locked to the top plate unit by a locking nut in the clamping state of the clamping device. 
     An advantage with this implementation form is that unwanted release of the installation bracket from the tubular element is avoided. 
     In a fourteenth possible implementation form of an installation bracket according to any of the above ninth to thirteenth implementation forms of the first aspect, the respective clamping unit comprises a clamping leg pivotally coupled to the clamping unit retainer device, and further comprises a clamping foot pivotally coupled to the clamping leg, wherein the clamping foot is configured to provide an axially extended contact at the inner wall of the tubular element in the clamping state of the clamping device. 
     An advantage with this implementation form is that the contact between the respective clamping unit and the inner wall of the tubular element can be distributed over a more widespread area. 
     Further applications and advantages of the present invention will be apparent from the following detailed description. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The appended drawings are intended to clarify and explain different embodiments of the present invention, in which: 
         FIG. 1  shows an installation bracket according an embodiment of the present invention; 
         FIG. 2  shows a partly sectioned view of the installation bracket according to  FIG. 1 ; 
         FIG. 3  shows a side view of the installation bracket  100  according to  FIG. 1 ; 
         FIG. 4  shows a side view of a tubular element and a thereon mounted piece of Telecom Equipment; 
         FIG. 5  shows a side view of a further tubular element and a thereon mounted piece of Telecom Equipment; 
         FIG. 6  shows a sectioned top view of an installation bracket according to  FIG. 1 ; 
         FIG. 7  shows another sectioned top view of an installation bracket according to  FIG. 1 ; and 
         FIG. 8  shows a further sectioned top view of a installation bracket according to  FIG. 1 . 
     
    
    
     DETAILED DESCRIPTION 
       FIG. 1  shows an installation bracket  100  according an embodiment of the present invention, the installation bracket  100  comprising a top plate unit  102  configured to be positioned at the top end of a tubular element ( 104 —see  FIGS. 4 to 8 ), and a clamping device  106  coupled to the top plate unit  102 , wherein the clamping device  106  is configured to be clamped against the inner wall ( 108 —see  FIGS. 6 to 8 ) of the tubular element thereby fixing the installation bracket  100  to the tubular element in its clamping state. 
     According to one embodiment, the tubular element can be an installation pole or installation tower for equipment ( 176 —see  FIGS. 4 and 5 ). 
     According to one embodiment, the equipment ( 176 —see  FIGS. 4 and 5 ) configured to be mounted on the installation bracket  100  can be telecom equipment, e.g. an antenna, an antenna with integrated radio units, or a complete radio base station including at least one antenna. 
     The equipment configured to be mounted on the installation bracket  100  can be mounted directly thereon, or indirectly thereon via an intermediate spacer element, by e.g. using mounting holes  178  in the installation bracket  100 . If cables to the equipment configured to be mounted on the installation bracket  100  are to be routed inside the tubular element, the spacer element can be designed to distance the equipment from the tubular element in order to allow for cable attachment after mounting of the installation bracket  100  to the tubular element and the equipment to the installation bracket  100 . After attachment of the cables, this void between the tubular element and the equipment can thereafter be covered by a sleeve unit ( 180 —see  FIGS. 4 and 5 ). 
     According to an embodiment of the invention, the installation bracket  100  can further comprise a locating arrangement  110  coupled to the top plate unit  102 , wherein the locating arrangement  110  is configured to position the top plate unit  102  in or on the tubular element. 
     According to an embodiment of the invention, the locating arrangement  110  can comprise at least three locating devices  112 ,  114 ,  116  configured to position the top plate unit  102  in or on the tubular element. 
     According to an embodiment of the invention, the at least three locating devices  112 ,  114 ,  116  are configured to be releasably locked to the top plate unit  102  and further configured to position the top plate unit  102  in or on the tubular element when abutting against the inner wall of the tubular element in the locked state of the respective locating device  112 ,  114 ,  116 . 
     According to an embodiment of the invention, the respective locating device  112 ,  114 ,  116  is in its unlocked state configured to be displaceable in a respective slot  118 ,  120 ,  122  in the top plate unit  102  towards and away from the inner wall of the tubular element. 
     According to an embodiment of the invention, the respective locating device  112 ,  114 ,  116  may comprise a respective locking screw  182 ,  184 ,  186  with which the respective locating device  112 ,  114 ,  116  can be locked in position in the respective slot  118 ,  120 ,  122  in the top plate unit  102 . 
     According to an embodiment of the invention, the clamping device  106  comprises at least three clamping units  124 ,  126 ,  128  configured to abut against the inner wall of the tubular element in the clamping state of the clamping device. 
     According to an embodiment of the invention, the installation bracket  100  further comprises a clamping actuator mechanism  130 , wherein the clamping units  124 ,  126 ,  128  are configured to be displaceable towards and away from the inner wall of the tubular element by operation of the clamping actuator mechanism  130 . 
     According to an embodiment of the invention, the clamping actuator mechanism  130  comprises a clamping actuator screw  132  configured to control the movement of the clamping units  124 ,  126 ,  128  towards and away from the inner wall of the tubular element. 
     According to an embodiment of the invention, the clamping actuator mechanism  130  further comprises a clamping unit retainer device  140  and a clamping unit guide device  142 , where the respective clamping unit  124 ,  126 ,  128  is pivotally mounted on the clamping unit retainer device  140 , where the clamping unit retainer device  140  is configured to move axially together with the clamping actuator screw  132  when the clamping actuator screw  132  is turned around its axis A, and where the clamping unit guide device  142  is immovably fixed to the top plate unit  102 . 
     According to an embodiment of the invention, the clamping unit guide device  142  has a corresponding slot  144 ,  146 ,  148  for each clamping unit  124 ,  126 ,  128 , where each slot  144 ,  146 ,  148  is closed at the end  150 ,  152 ,  154  opposite to the position of the top plate unit  102 , where each clamping unit  124 ,  126 ,  128  is configured to abut against the clamping unit guide device  142  at the respective closed end  150 ,  152 ,  154  of the respective corresponding slot  144 ,  146 ,  148  during operation of the clamping actuator screw  132 , where each slot  144 ,  146 ,  148  is configured to run in parallel with the axis A of the clamping actuator screw  132 , and where the walls of each slot  144 ,  146 ,  148  are configured to control the movement of the respective clamping unit  124 ,  126 ,  128  along the axis A of the clamping actuator screw  132  when the clamping actuator screw  132  is turned around its axis A. 
     According to an embodiment of the invention, the clamping unit guide device  142  is configured to be immovably fixed to the top plate unit  102  by that a clamping screw sleeve  156  is immovably fixed at one end ( 158 —see  FIG. 2 ) to the top plate unit  102  and immovably fixed at the other end  160  to the clamping unit guide device  142 . This can be done using at least one threaded joint or at least one welded joint or at least one bayonet mount with a locking screw or by integrating the clamping screw sleeve  156  with the top plate unit  102  or the clamping unit guide device  142 . 
     According to an embodiment of the invention, the clamping actuator screw  132  is configured positioned within the clamping screw sleeve  156 . 
     According to an embodiment of the invention, the clamping actuator screw  132  is configured to be locked to the top plate unit  102  by a locking nut  162  in the clamping state of the clamping device  106 . 
     According to an embodiment of the invention, the respective clamping unit  124 ,  126 ,  128  comprises a clamping leg  164 ,  166 ,  168  pivotally coupled to the clamping unit retainer device  140 , and further comprises a clamping foot  170 ,  172 ,  174  pivotally coupled to the clamping leg  164 ,  166 ,  168 , wherein the clamping foot  170 ,  172 ,  174  is configured to provide an axially extended contact at the inner wall of the tubular element in the clamping state of the clamping device  106 . 
     Cables to the equipment configured to be mounted on the installation bracket can be routed outside of the tubular element, but openings  188 ,  190 ,  192  in the top plate unit  102  also support cable routing inside the tubular element. 
       FIG. 2  shows a partly sectioned view of the installation bracket  100  according to  FIG. 1 , and  FIG. 3  shows a side view of the installation bracket  100  according to  FIG. 1 . 
     Referring now to  FIGS. 2 and 3 : 
     According to an embodiment of the invention, a thread  134  arranged on the clamping actuator screw  132  is configured to pass through, and interact with a corresponding thread  136  in, a threaded hole  138  in the top plate unit  102 , as can be seen in the figure. Thus, when the clamping actuator screw  132  of the clamping actuator mechanism  130  is turned around its axis A, the clamping actuator screw  132  moves up and down through the threaded hole  138  in the top plate unit  102 . 
     The operation of the clamping units  124 ,  126 ,  128  (for  128 —see  FIG. 3 ) is now described referring to the parts of clamping unit  124  shown in the figure, where the other two clamping units  126 ,  128  are operated in the same way. 
     As mentioned above, the clamping unit guide device  142  is immovably fixed to the top plate unit  102 , e.g. by that a clamping screw sleeve  156  is immovably fixed at one end  158  to the top plate unit  102  and immovably fixed at the other end  160  to the clamping unit guide device  142 , whereas the clamping unit retainer device  140  is configured to move axially together with the clamping actuator screw  132  when the clamping actuator screw  132  is turned around its axis A. The clamping unit retainer device  140  is configured to be able to turn around the axis of the clamping actuator screw  132  in relation to the clamping actuator screw  132 . This can be accomplished by mounting the clamping unit retainer device  140  in a radial groove  208  on the clamping actuator screw  132 . 
     Thus, when the clamping actuator screw  132  moves up and down, the clamping unit retainer device  140  moves up and down together with the clamping actuator screw  132 . As the respective clamping unit  124 ,  126 ,  128  is pivotally mounted on the clamping unit retainer device  140 , the clamping unit guide device  142  is immovably fixed to the top plate unit  102 , and as each clamping unit  124 ,  126 ,  128  is configured to abut against the clamping unit guide device  142  at the respective closed end  150 ,  152 ,  154  (for  152  and  154 —see  FIG. 1 ) of the respective corresponding slot  144 ,  146 ,  148  (for  146  and  148 —see  FIG. 1 ) during operation of the clamping actuator screw  132 , a downward movement of the clamping actuator screw  132  and thus the clamping unit retainer device  140  results in an upward and outward movement of each clamping unit  124 ,  126 ,  128 . When the clamping screw  132  is moved upwards, each clamping unit  124 ,  126 ,  128  moves downwards and inwards. Thus, the movement of the clamping units  124 ,  126 ,  128  towards and away from the inner wall of the tubular element is controlled by turning the clamping actuator screw  132  around its axis A. 
     In the figure is also shown an embodiment of the locating arrangement  110  comprising three locating devices  112 ,  114 ,  116  (for  116 —see  FIG. 3 ) configured to position the top plate unit  102  in the tubular element. According to this embodiment, the respective locating device  112 ,  114 ,  116  is in its unlocked state configured to be displaceable in a respective slot  118 ,  120 ,  122  in the top plate unit  102  towards and away from the inner wall of the tubular element, where the respective locating device  112 ,  114 ,  116  in this embodiment comprise a respective locking screw with which the respective locating device  112 ,  114 ,  116  can be locked in position in the respective slot  118 ,  120 ,  122  (for  120  and  122  —see  FIG. 1 ) in the top plate unit  102 . As can be seen in the figure, the respective slot  118 ,  120 ,  122  can be a stepped slot. When using a stepped slot, only one locking screw is needed for the locating member  194 ,  196 ,  198  of each locating device  112 ,  114 ,  116 . 
     A circlip  200  can be arranged at the end of the respective locking screw  182 ,  184 ,  186  in order to avoid that the locating member  194 ,  196 ,  198  of the respective locating device  112 ,  114 ,  116  is separated from the top plate unit  102  when the locking screw  182 ,  184 ,  186  is opened. 
     A bushing  202  made of a material with low friction can be arranged between the clamping actuator screw  132  and the clamping unit retainer device  140  in order to decrease friction therebetween during operation of the clamping actuator mechanism  130 . 
     According to one embodiment, the respective clamping foot  170 ,  172 ,  174  is configured to provide an axially extended contact at the inner wall of the tubular element in the clamping state of the clamping device  106  by configuring the respective clamping foot  170 ,  172 ,  174  with axially displaced contact members,  204 ,  206 . 
       FIG. 4  shows a side view of a tubular element  104 , e.g. an installation pole for telecom equipment, and a thereon mounted piece of equipment  176 , e.g. telecom equipment, where the outer diameter of the tubular element  104  is similar to that of the thereon mounted piece of equipment  176 . A sleeve unit  180  covering a void between the tubular element  104  and the equipment  176  is also shown in the figure. 
       FIG. 5  shows a side view of a tubular element  104 , e.g. an installation pole for telecom equipment, and a thereon mounted piece of equipment  176 , e.g. telecom equipment, where the outer diameter of the tubular element  104  is smaller than that of the thereon mounted piece of equipment  176 . A sleeve unit  180  covering a void between the tubular element  104  and the equipment  176  is also shown in the figure. 
       FIG. 6  shows a sectioned top view of a installation bracket  100  according to  FIG. 1 , which is mounted on top of a tubular element  104  having a circular cross-section. In the figure is shown an embodiment of the invention, where the clamping device  106  comprises at least three clamping units  124 ,  126 ,  128  configured to abut against the inner wall  108  of the tubular element  104  in the clamping state of the clamping device  106 . 
       FIG. 7  shows another sectioned top view of a installation bracket  100  according to  FIG. 1 , which is mounted on top of a tubular element  104  having a triangular cross-section. In the figure is shown an embodiment of the invention, where the clamping device  106  comprises at least three clamping units  124 ,  126 ,  128  configured to abut against the inner wall  108  of the tubular element  104  in the clamping state of the clamping device  106 . 
       FIG. 8  shows a further sectioned top view of a installation bracket  100  according to  FIG. 1 , which is mounted on top of a tubular element  104  having a rectangular cross-section. In the figure is shown an embodiment of the invention, where the clamping device  106  comprises at least three clamping units  124 ,  126 ,  128  configured to abut against the inner wall  108  of the tubular element  104  in the clamping state of the clamping device  106 . 
     The tubular element can also have other non-circular cross-section shapes than those shown in  FIGS. 7 and 8 , e.g. hexagonal and octagonal, etc. In order to adjust the installation bracket more closely to tubular element cross-section shapes other than the circular shape, it is possible but not necessary to modify the number of clamping units, the number of locating devices, the top plate unit shape, the shape of the clamping unit retainer device, and the shape of the clamping unit guide device. 
     Reference is now made to  FIG. 1-8 . 
     The installation bracket  100  according to the embodiment shown in the  FIGS. 1-8  is mounted on a tubular element  104  as follows: 
     Firstly, the clamping device  106  of the installation bracket  100  is inserted into the tubular element  104  until the top plate unit  102  of the installation bracket  100  is positioned at the top end of the tubular element  104 , i.e. until a part of the top plate unit  102  rests on the upper edge of the tubular element  104 . 
     Thereafter, the clamping device  106  is clamped against the inner wall  108  of the tubular element  104  thereby fixing the installation bracket  100  to the tubular element  104  in its clamping state, i.e. the clamping actuator screw  132  is turned about its axis A, i.e. “tightened”, until the respective clamping unit  124 ,  126 ,  128 , i.e. the respective clamping foot  170 ,  172 ,  174 , abuts against the inner wall  108  of the tubular element  104 . The installation bracket  100  does therefore not need to be correctly positioned in the tubular element  104  before clamping, but is instead self-locating in the tubular element  100 . 
     Due to the movement of the respective clamping unit  124 ,  126 ,  128 , the top plate unit  102  is drawn towards the tubular element  104  during the final part of the “tightening” of the clamping actuator screw  132  as the respective clamping unit  124 ,  126 ,  128  has reached the inner wall  108  of the tubular element  104 . Thus a water tight joint can be achieved between the top plate unit  102  and the tubular element  104  if the tubular element  104  or the top plate unit  102  comprises a gasket arranged thereon at the at the joint therebetween. 
     When the clamping device  106  has been clamped against the inner wall  108  of the tubular element  104 , the clamping actuator screw  132  can be locked to the top plate unit  102  by a locking nut  162  in the clamping state of the clamping device  106  in order to avoid unwanted movement of the clamping actuator screw  132  and thus the respective clamping foot  170 ,  172 ,  174 . 
     The equipment  176  configured to be mounted on the installation bracket  100  and thus on the tubular element  104  can be mounted on the installation bracket  100  before or after the installation bracket  100  is mounted on the tubular element  104 . 
     If the equipment  176  configured to be mounted on the installation bracket  100  comprises an antenna, it is preferred to adjust the antenna azimuth angle by turning the installation bracket  100  about its axis before the clamping device  106  is clamped against the inner wall  108  of the tubular element  104 . 
     If the installation bracket  100  comprises a locating arrangement  110  comprising at least three locating devices  112 ,  114 ,  116  configured to position the top plate unit  102  in the tubular element  104 , the locating devices  112 ,  114 ,  116  can be made to abut against the inner wall  108  of the tubular element  104  before or after the clamping device  106  is clamped against the inner wall  108  of the tubular element  104 . 
     Finally, it should be understood that the present invention is not limited to the embodiments described above, but also relates to and incorporates all embodiments within the scope of the appended independent claims.