Patent Publication Number: US-2022238982-A1

Title: Antenna clamping device

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a Continuation of International Application No. PCT/KR2020/014367, filed on Oct. 21, 2020, which claims benefit of and priority to Korean Patent Application Nos. 10-2019-0133520, filed on Oct. 25, 2019; and 10-2019-0169527, filed on Dec. 18, 2019, the disclosure of which are herein incorporated by reference in their entirety. 
    
    
     TECHNICAL FIELD 
     The present invention relates to an antenna clamping device, and more particularly, to an antenna clamping device capable of simply inserting an antenna device having a comparatively heavy weight into and seating the antenna device onto an upper end of a support pole without a separate fixing device, thereby improving workability of an installer. 
     BACKGROUND ART 
     In general, as an example of wireless communication technologies, a multiple-input/multiple-output (MIMO) technology refers to a technology for innovatively increasing data transmission capacity by using a plurality of antennas. This technology uses a spatial multiplexing technique, in which a transmitter transmits different data through the respective transmission antennas, and a receiver distinguishes the transmitted data by performing appropriate signal processing. 
     Therefore, it is possible to transmit a larger amount of data by increasing both the number of transmitting antennas and the number of receiving antennas and thus increasing channel capacities. For example, if the number of antennas increases to ten, the channel capacity of about times is ensured by using the same frequency band in comparison with the current single antenna system. 
     Eight antennas are used in 4G LTE-advanced, and a product equipped with 64 or 128 antennas has been developed in a current pre-5G step. It is expected that base station equipment having a much larger number of antennas will be used in 5G, which refers to a massive MIMO technology. The current cell management is 2-dimension, but 3D-beamforming may be enabled when the massive MIMO technology is introduced, which also represents a full-dimension (FD) MIMO. 
     In the massive MIMO technology, the number of transmitters and the number of filters are increased as the number of antennas (ANTs) is increased. Nevertheless, because of cost of lease or spatial restriction in respect to an installation location, RF components (antennas, filters, power amplifiers, transceivers, etc.) need to be practically manufactured to be small in size, light in weight, and inexpensive, and the massive MIMO requires a high output to expand a coverage. However, electric power consumption and heat generation, which are caused by the high output, have a negative effect on reductions in weight and size. 
     In particular, to install the MIMO antenna, in which modules including RF elements and digital elements are coupled in a layered structure, in a limited space, there is a need for compact and miniaturized design of a plurality of layers constituting the MIMO antenna in order to maximize ease of installation or spatial utilization. Further, there is a strong need for free adjustment of directions of an antenna device installed on a single support pole. 
     DISCLOSURE 
     Technical Problem 
     The present invention has been made in an effort to provide an antenna clamping device capable of being seated directly on an opened upper end of a support pole and securely fixed to an internal space of an upper end of the support pole without a separate fixing device. 
     Technical Solution 
     An embodiment of an antenna clamping device according to the present invention includes: an antenna clamping unit having a tip portion on which an antenna device is mounted, the antenna clamping unit being configured to perform at least any one of a tilting rotation and a rotating rotation to set directionality of the antenna device and having a rear end fixedly inserted into an opened upper end of the support pole; an insertion-type clamping unit disposed inside the opened upper end of the support pole and configured to mediate the fixed insertion of the antenna clamping unit, the insertion-type clamping unit being pressed and fixed to an inner peripheral surface of the support pole; and a support bracket unit fixedly disposed on an outer peripheral surface of the support pole and configured to fixedly support a lower end of the antenna clamping unit. 
     In this case, the insertion-type clamping unit may include: a clamping body fixedly inserted into and caught by the opened upper end of the support pole and having a hollow internal space divided into an upper space and a lower space by a partition plate; a fixing bolt configured to penetrate the internal space of the clamping body in an upward/downward direction; and a pair of locking pressing pieces configured to fix the clamping body by pressing the inner peripheral surface of the support pole in conjunction with a rotational operation of the fixing bolt. 
     In addition, the insertion-type clamping unit may further include a fixing nut fitted with an outer peripheral surface of the fixing bolt and configured to rotate the fixing bolt over the upper and lower spaces of the clamping body upward or downward depending on a rotation direction thereof. 
     In addition, the fixing nut may be fitted with the outer peripheral surface of the fixing bolt positioned in the upper space, and the fixing nut may be supported on and fastened to an upper surface of the partition plate. 
     In addition, the pair of locking pressing pieces may be positioned in the lower space of the internal space of the clamping body, and a pair of through portions may be formed in the clamping body and opened so that the pair of locking pressing pieces moves in a horizontal direction and comes into contact with the inner peripheral surface of the support pole. 
     In addition, outer surfaces of the pair of locking pressing pieces, which are in contact with the inner peripheral surface of the support pole, may be serrated to increase a contact force. 
     In addition, the insertion-type clamping unit may further include a lift piece fitted with an outer periphery of a lower end of the fixing bolt positioned in the lower space of the internal space of the clamping body, the lift piece being configured to operate in conjunction with the fixing bolt. 
     In addition, the lift piece may be fitted with the outer periphery of the lower end of the fixing bolt positioned in the lower space of the internal space of the clamping body, and the lift piece may be supported and caught by a bolt head portion having a diameter relatively larger than a diameter of the fixing bolt. 
     In addition, an outer surface of the lift piece may be inclined upward, inner surfaces of the pair of locking pressing pieces may be inclined in parallel with the outer surface of the lift piece, and outer surfaces of the pair of locking pressing pieces may be formed as curved surfaces parallel to the inner peripheral surface of the support pole. 
     In addition, the lower space of the internal space of the clamping body may be shielded by a lower plate, and a pair of guide ribs may be provided on the lower plate and guide upward and downward movements of the lift piece that is moved upward or downward by a movement of the fixing bolt in the upward/downward direction. 
     In addition, upper surfaces of the pair of locking pressing pieces may be in close contact with a lower surface of the partition plate, lower surfaces of the pair of locking pressing pieces may be supported on an upper surface of the lower plate, and the pair of locking pressing pieces may be movable in a horizontal direction between the partition plate and the lower plate depending on an upward or downward movement of the lift piece. 
     In addition, a catching flange may be formed at an upper end of the clamping body and extend radially outward to have an outer diameter larger than an inner diameter of the upper end of the support pole, and a lower friction ring pad may be further provided on an upper surface of the catching flange and generate a frictional force with a part of a lower surface of the rear end of the antenna clamping unit. 
     In addition, an upper friction ring pad may be further provided at the rear end of the antenna clamping unit and generate a frictional force while being in surface contact with the lower friction ring pad of the clamping body. 
     In addition, a mounting shaft may be provided at the rear end of the antenna clamping unit and have a mounting groove recessed downward, and the antenna clamping unit may be fixed as the mounting shaft is inserted into the upper space of the internal space of the clamping body. 
     In addition, an upper end of the fixing bolt may be fastened inside the mounting groove by bolting while penetrating the mounting shaft. 
     In addition, a bolting fastening portion may be provided at the rear end of the antenna clamping unit and fastened to the support bracket unit by bolting. 
     In addition, the support bracket unit may include: a fastening plate disposed at one outer peripheral side of the support pole and elongated in an upward/downward direction; a U-shaped bolt configured to penetrate U-shaped bolt fastening holes formed in the fastening plate, the U-shaped bolt being coupled to the other outer periphery side of the support pole while surrounding the outer peripheral surface of the support pole; and a close-contact plate extending upward from the fastening plate and being in close contact with a bolting fastening portion of the antenna clamping unit. 
     In addition, the antenna clamping unit may be fixed by at least one fixing bolt that penetrates the close-contact plate and is fastened to the bolting fastening portion. 
     In addition, the fastening plate and the close-contact plate may be positioned at a position at which the bolting fastening portion and the close-contact plate face each other when the antenna clamping unit is inserted and supported in an internal space of the clamping body fixed to the upper end of the support pole. 
     Another embodiment of an antenna clamping device according to the present invention includes: an antenna clamping unit having a tip portion on which an antenna device is mounted, the antenna clamping unit being configured to perform at least any one of a tilting rotation and a rotating rotation to set directionality of the antenna device and having a rear end inserted and fixed into an opened upper end of the support pole; and an insertion-type clamping unit disposed inside the opened upper end of the support pole and configured to mediate the fixed insertion of the antenna clamping unit, the insertion-type clamping unit being pressed and fixed to an inner peripheral surface of the support pole, in which the insertion-type clamping unit includes: a clamping body fixedly inserted into and caught by the opened upper end of the support pole and having a hollow internal space divided into an upper space and a lower space by a partition plate; a fixing bolt configured to penetrate the internal space of the clamping body in an upward/downward direction; and a pair of locking pressing pieces configured to fix the clamping body by pressing the inner peripheral surface of the support pole in conjunction with a rotational operation of the fixing bolt. 
     Advantageous Effects 
     The embodiment of the antenna clamping device according to the present invention may achieve the following various effects. 
     First, the number of components for fixing the antenna clamping unit is significantly reduced in comparison with the related art, which makes it possible to reduce costs. 
     Second, the insertion-type clamping unit is positioned in the internal space of the support pole to fix the antenna clamping unit, which makes it possible to prevent deterioration in aesthetic external appearance. 
     Third, it is possible to easily perform the process of installing the antenna clamping unit and the antenna device which are comparatively heavy in weight. 
    
    
     
       DESCRIPTION OF DRAWINGS 
         FIG. 1  is a perspective view illustrating an antenna clamping device according to an embodiment of the present invention and a partially cut-away perspective view. 
         FIG. 2  is an exploded perspective view of  FIG. 1 . 
         FIG. 3  is a perspective view illustrating a state in which an insertion-type clamping unit and a support bracket unit among the components illustrated in  FIG. 1  are installed on a support pole. 
         FIG. 4  is an exploded perspective view illustrating a state in which the insertion-type clamping unit among the components illustrated in  FIG. 3  is installed. 
         FIG. 5  is an exploded perspective view illustrating a state in which the support bracket unit among the components illustrated in  FIG. 3  is installed. 
         FIGS. 6A and 6B  are exploded perspective views illustrating an external configuration and an internal configuration of the insertion-type clamping unit among the components illustrated in  FIG. 3 . 
         FIG. 7  is a cut-away perspective view taken along line B-B in  FIG. 3 . 
         FIG. 8  is a cut-away perspective view taken along line B-B in  FIG. 3 , i.e., an exploded perspective view of the configuration disposed outside the support pole. 
         FIGS. 9A and 9B  are cross-sectional views illustrating states in which a locking pressing piece among the components of the insertion-type clamping unit illustrated in  FIG. 3  operates. 
     
    
    
     DESCRIPTION OF MAIN REFERENCE NUMERALS OF DRAWINGS 
     
         
         
           
               1 : Support pole 
               1   a : Upper-end opening portion 
               10 : Antenna clamping unit 
               11 : Tilting unit 
               12 : Rotation unit 
               13 : Coupling unit 
               15 : Rear end 
               16 : Mounting groove 
               17 : Mounting shaft 
               18 : Bolting fastening portion 
               19 : Bolt fastening hole 
               20 : Upper friction ring pad 
               21 : Flat-head threaded member 
               50 : Support bracket unit 
               51 : Fastening plate 
               52  U-shaped bolt fastening hole 
               53 : U-shaped bolt 
               54 : U-shaped bolt fastening nut 
               55 : Elastic washer 
               56 : Close-contact plate 
               57 : Bolt through-hole 
               58 : Fixing bolt 
               100 : Insertion-type clamping unit 
               110 : Clamping body 
               115 : Through portion 
               120 : Partition plate 
               125 : Catching flange 
               130 : Lower plate 
               131 : Guide rib 
               140 : Fixing bolt 
               145 : Bolt head portion 
               150 : Fixing nut 
               160 : Fixing washer 
               170 : Lift piece 
               180   a ,  180   b : Locking pressing piece 
               190 : Screw fastening hole 
               200 : Lower friction ring pad 
               210 : Flat-head threaded member 
           
         
       
    
     BEST MODE 
     Hereinafter, embodiments of an antenna clamping device according to the present invention will be described in detail with reference to the accompanying drawings. In assigning reference numerals to constituent elements of the respective drawings, it should be noted that the same constituent elements will be designated by the same reference numerals, if possible, even though the constituent elements are illustrated in different drawings. Further, in the following description of the embodiments of the present invention, a detailed description of publicly known related configurations or functions incorporated herein will be omitted when it is determined that the detailed description obscures the subject matters of the embodiments of the present invention. 
     In addition, the terms first, second, A, B, (a), and (b) may be used to describe constituent elements of the embodiments of the present invention. These terms are used only for the purpose of discriminating one constituent element from another constituent element, and the nature, the sequences, or the orders of the constituent elements are not limited by the terms. Further, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by those skilled in the art to which the present invention pertains. The terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with meanings in the context of related technologies and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. 
       FIG. 1  is a perspective view illustrating an antenna clamping device according to an embodiment of the present invention and a partially cut-away perspective view, and  FIG. 2  is an exploded perspective view of  FIG. 1 . 
     As illustrated in  FIGS. 1 and 2 , an antenna clamping device according to an embodiment of the present invention includes: an antenna clamping unit  10  having a tip portion on which a non-illustrated antenna device is mounted, the antenna clamping unit  10  being configured to perform any one of a tilting rotation and a rotating rotation to set directionality of the antenna device; an insertion-type clamping unit  100  configured to mediate the fixed insertion of the antenna clamping unit  10  into an upper end of a support pole  1 ; and a support bracket unit  50  configured to fixedly support a lower end of the antenna clamping unit  10 . 
     The antenna clamping unit  10  serves to substantially mediate the mounting of the antenna device. As illustrated in  FIGS. 1 and 2 , the antenna clamping unit  10  may perform any one of the tilting rotation and the rotating rotation to set the directionality of the antenna device. 
     More specifically, the antenna clamping unit  10  may include: a tilting unit  11  having a front end on which the antenna device is installed, the tilting unit  11  being configured to perform a tilting rotation about a tilting shaft TS by a predetermined angle in an upward/downward direction in a state in which the antenna device is installed; a rotation unit  12  coupled to a rear end of the tilting unit  11 , the rotation unit  12  being configured to rotate the antenna device about a rotating shaft RS by a predetermined angle in a leftward/rightward direction; and a coupling unit  13  coupled to a rear end of the rotation unit  12 , the coupling unit  13  configured to mediate the fixed insertion into the support pole  1 . 
     That is, the directionality of the antenna device mounted on the antenna clamping unit  10  may be adjusted as the antenna device is tilted in the upward/downward direction by the tilting unit  11 , and the directionality of the antenna device may be also adjusted as the antenna device is rotated in the leftward/rightward direction by the rotation unit  12 , which makes it possible to further improve reliability related to signal quality of the antenna device. 
     As illustrated in  FIGS. 1 and 2 , in the configuration of the antenna clamping unit  10 , an upper portion of a rear end  15  of the coupling unit  13  may extend horizontally toward the upper end of the support pole  1 , and a mounting shaft  17  may be formed at the extending rear end  15  of the coupling unit  13  and have a mounting groove  16  extending and recessed downward. 
     The mounting shaft  17  of the coupling unit  13  may be inserted and seated in an upper space of an internal space of the insertion-type clamping unit  100  installed on an upper-end opening portion of the support pole  1 . An upper end of a fixing bolt  140  of the insertion-type clamping unit  100 , which is exposed upward while penetrating the mounting groove  16  and will be described below, may be fastened and fixed by a non-illustrated fastening nut. Further, the mounting shaft  17  of the coupling unit  13  may be sized to be matched in shape with the upper space of the internal space of the insertion-type clamping unit  100 , thereby preventing an overall clearance (or sway) of the antenna clamping unit  10  fixedly seated on the insertion-type clamping unit  100 . 
     Further, as illustrated in  FIGS. 1 and 2 , a bolting fastening portion  18  may be provided at a lower side of a rear end of the coupling unit  13  and fixedly fastened and brought into contact with the support bracket unit  50  to be described below. One or more bolt fastening holes  19  may be formed in the bolting fastening portion  18 . Fixing bolts  58  of the support bracket unit  50  may be penetratively fastened to the bolt fastening holes  19  of the bolting fastening portion  18 , such that the bolting fastening portion  18  formed at the rear end of the coupling unit  13  of the antenna clamping unit  10  may be coupled. 
     As illustrated in  FIGS. 1 and 2 , the insertion-type clamping unit  100  serves to mediate the coupling of the antenna clamping unit  10  so that the antenna clamping unit  10  may be securely fixed by being mounted in the form of a single beam on the upper end of the support pole  1 . 
     Although not illustrated in the drawings, typically, a separate mounting bracket or mounting arm is mounted first to surround an outer peripheral surface of the support pole  1 , and then the antenna clamping unit  10  is coupled to the mounting bracket or mounting arm. However, the mounting bracket or mounting arm is exposed to the outside of the support pole  1 , which degrades an aesthetic external appearance of the support pole  1  on which the antenna device is installed. For this reason, a combination of complicated and rigid components is needed to support the antenna clamping unit  10  and the antenna device, which are comparatively heavy in weight, in a gravitational direction. According to the antenna clamping device according to the embodiment of the present invention, the number of components, which may degrade the aesthetic external appearance of the support pole  1 , may be minimized, some of the components capable of fixedly supporting the antenna clamping unit  10  may be hidden in the upper-end opening portion of the support pole  1 , and the more secure support structure may be implemented. 
     That is, as illustrated in  FIGS. 1 and 2 , in the antenna clamping device according to the embodiment of the present invention, only the support bracket unit  50 , which is simply configured to prevent a clearance (sway) of the antenna clamping unit  10  in a leftward/rightward direction, is installed on an outer peripheral surface of the support pole  1  spaced apart downward by a predetermined distance from the upper end of the support pole  1 . In addition, the insertion-type clamping unit  100  is embedded in the upper-end opening portion of the support pole  1  and mediates the connection with and fixing of the antenna clamping unit  10 . In this case, the antenna clamping unit  10  may be securely fixed by the support bracket unit  50  after the rear end  15  of the coupling unit  13  is simply and fixedly seated onto the upper end of the insertion-type clamping unit  100 . 
       FIG. 3  is a perspective view illustrating a state in which the insertion-type clamping unit and the support bracket unit among the components illustrated in  FIG. 1  are installed on the support pole,  FIG. 4  is an exploded perspective view illustrating a state in which the insertion-type clamping unit among the components illustrated in  FIG. 3  is installed, and  FIG. 5  is an exploded perspective view illustrating a state in which the support bracket unit among the components illustrated in  FIG. 3  is installed. 
     As illustrated in  FIGS. 3 and 4 , in the embodiment of the antenna clamping device according to the present invention, the insertion-type clamping unit  100  may be fixedly inserted into the upper-end opening portion of the support pole  1  before the antenna clamping unit  10  is fixed to the support pole  1 . Then, the support bracket unit  50  may be temporarily fixed to the outer peripheral surface of the support pole  1  spaced apart downward by a predetermined distance from the upper end of the support pole  1 . 
     In this case, as illustrated in  FIG. 5 , the support bracket unit  50  may include a fastening plate  51  disposed at one outer peripheral side of the support pole  1  and elongated in an upward/downward direction, a U-shaped bolt  53  disposed at the other outer periphery side of the support pole  1  and coupled to surround the outer peripheral surface of the support pole  1  while penetrating U-shaped bolt fastening holes  52  formed in the fastening plate  51 , and a close-contact plate  56  extending upward from the fastening plate  51  and configured to come into close contact with the bolting fastening portion  18  of the antenna clamping unit  10 . 
     The fastening plate  51  may include a rounded curved surface shape being approximately in close contact with the outer peripheral surface of the support pole  1 . The fastening plate  51  may have the U-shaped bolt fastening holes disposed at one side and the other side thereof and penetrated by tip portions of the U-shaped bolt  53 . 
     The tip portions of the U-shaped bolt  53 , which penetrate the U-shaped bolt fastening holes  52 , are securely fastened by U-shaped bolt fastening nuts  54  with elastic washers  55  interposed between a front surface of the fastening plate  51  and the U-shaped bolt fastening nuts  54 . The U-shaped bolt  53  may be securely fixed to the outer peripheral surface of the support pole  1  by a tightening force of the U-shaped bolt fastening nuts  54 . 
     The close-contact plate  56  is bent and extends upward from the fastening plate  51 . However, the close-contact plate  56  may not be necessarily bent and extend upward but extend downward. Further, bolt through-holes  57  may be formed through the close-contact plate  56  in a forward/rearward direction. The rear end of the coupling unit  13  of the antenna clamping unit  10  may be securely fixed into the bolt through-holes  57  formed in the close-contact plate  56  as the fixing bolts  58  penetrate the bolt through-holes  57  from rearward of the close-contact plate  56  and are fastened to the bolt fastening holes  19  of the bolting fastening portion  18  formed at the rear end of the coupling unit  13  of the components of the antenna clamping unit  10 . 
     In this case, as illustrated in  FIGS. 1 and 2 , the fastening plate  51  and the close-contact plate  56  may be positioned at a position at which the bolting fastening portion  18  and the close-contact plate  56  face each other when the antenna clamping unit  10  is inserted and supported in the upper space of the internal space of a clamping body  110  of the insertion-type clamping unit  100  fixed to the upper end of the support pole  1 . 
       FIGS. 6A and 6B  are exploded perspective views illustrating an external configuration and an internal configuration of the insertion-type clamping unit among the components illustrated in  FIG. 3 ,  FIG. 7  is a cut-away perspective view taken along line B-B in  FIG. 3 ,  FIG. 8  is a cut-away perspective view taken along line B-B in  FIG. 3 , i.e., an exploded perspective view of the configuration disposed outside the support pole, and  FIGS. 9A and 9B  are cross-sectional views illustrating states in which a locking pressing piece among the components of the insertion-type clamping unit illustrated in  FIG. 3  operates. 
     As illustrated in  FIGS. 6A to 9B , in the embodiment of the antenna clamping device according to the present invention, the insertion-type clamping unit  100  may include: the clamping body  110  fixedly inserted into and caught by an inner portion of the opened upper end of the support pole  1  and having a hollow internal space divided into the upper and lower spaces by a partition plate  120 ; the fixing bolt  140  provided to penetrate the internal space of the clamping body  110  in the upward/downward direction; and a pair of locking pressing pieces  180   a  and  180   b  configured to fix the clamping body  110  by pressing an inner peripheral surface of the support pole  1  in conjunction with a rotational operation of the fixing bolt  140 . 
     As illustrated in  FIGS. 6A to 9B , the clamping body  110  may be inserted into the inner peripheral surface of an upper-end opening portion  1   a  of the support pole  1  and have a tubular shape having an internal space. The internal space of the clamping body  110  may be divided into the upper space and the lower space by the partition plate  120 . 
     An upper end of the clamping body  110  may have a catching flange  125  extending radially outward and having an outer diameter larger than an inner diameter of the upper end of the support pole  1 . Therefore, the clamping body  110  may be inserted and seated in the upper-end opening portion  1   a  of the support pole  1  as the clamping body  110  is caught by a lower surface of the catching flange  125  and an upper-end surface of the support pole  1 . In this case, an outer peripheral surface of the clamping body  110  may be disposed to be in close contact with or adjacent to the inner peripheral surface of the upper-end opening portion  1   a  of the support pole  1 . 
     Further, a lower friction ring pad  200  may be further provided on the upper surface of the catching flange  125  formed at the upper end of the clamping body  110  and generate a frictional force with a part of a lower surface of the rear end  15  of the antenna clamping unit  10 . 
     A plurality of screw fastening holes  190  is formed downward in an upper-end surface of the catching flange  125  of the clamping body  110 , and a plurality of screw through-holes  290  is also penetratively formed in the lower friction ring pad  200  in the upward/downward direction. The lower friction ring pad  200  may be coupled as flat-head threaded members  210  penetrate the screw through-holes  290  from above to below the lower friction ring pad  200  and are fastened to the screw fastening holes  190  formed in the upper-end surface of the catching flange  125 . 
     In addition, as illustrated in  FIG. 1 , an upper friction ring pad  20  may be fixedly fastened, by flat-head threaded members  21 , to the lower surface of the rear end  15  of the coupling unit  13  among the components of the antenna clamping unit  10 , more specifically, a lower surface of a peripheral portion of the mounting shaft  17 , the upper friction ring pad  20  generating a frictional force by being in surface contact with the lower friction ring pad  200 . 
     The upper friction ring pad  20  of the antenna clamping unit  10  and the lower friction ring pad  200  of the insertion-type clamping unit  110  may be in surface contact with each other and generate a predetermined frictional force, which makes it possible to prevent the sway caused by fine vibration transmitted from the outside (e.g., the sway caused by wind). 
     Meanwhile, the internal space of the clamping body  110  may be divided into the upper space positioned at the upper side thereof and the lower space positioned at the lower side thereof by the partition plate  120  integrally disposed horizontally in a middle portion thereof. 
     The upper space of the internal space of the clamping body  110  may be opened upward, and the lower space of the internal space thereof may be shielded by a lower plate  130 . The upper and lower spaces of the clamping body  110  may communicate with each other through a fixing bolt through-hole (no reference numeral) penetrated by the fixing bolt  140 . 
     In this case, the fixing bolt  140  may be disposed to penetrate the fixing bolt through-hole formed in the clamping body  110 . The fixing bolt  140  may be disposed over the upper and lower spaces of the clamping body  110 . 
     Further, the fixing bolt  140  may further include a fixing nut  150  fitted with an outer peripheral surface of the fixing bolt positioned in the upper space of the clamping body  110  and configured to rotate the fixing bolt  140  upward or downward over the upper and lower spaces of the clamping body  110  while rotating depending on a rotation direction of the fixing nut  150 . 
     More specifically, the fixing nut  150  may be fitted with the outer peripheral surface of the fixing bolt positioned in the upper space. The fixing nut  150  may be supported by and fastened to an upper surface of the partition plate  120 . In this case, a fixing washer  160  may be further interposed between the fixing nut  150  and the upper surface of the partition plate  120 , thereby preventing the fixing bolt  140  from being arbitrarily loosened. For reference, if the fixing bolt  140  is arbitrarily loosened, the fixing bolt  140  may move downward. When the fixing bolt  140  moves downward, a fixing force of the clamping body  110 , which is applied to the inner peripheral surface of the upper-end opening portion  1   a  of the support pole  1  by the locking pressing piece  180   a  and  180   b  to be described below, may be decreased. 
     Meanwhile, the clamping body  110  may have a pair of through portions  115  opened by cutting an outer peripheral surface of the clamping body  110  so that the pair of through portions  115  communicate with the lower space of the internal space. The pair of through portions  115  serve as passageways through which the pair of locking pressing pieces  180   a  and  180   b  positioned in the lower space of the internal space of the clamping body  110  moves in the horizontal direction and comes into contact with the inner peripheral surface of the support pole  1 . 
     The insertion-type clamping unit  100  of the antenna clamping device according to the embodiment of the present invention may further include a lift piece  170  fitted with an outer periphery of a lower end of the fixing bolt  140  positioned in the lower space of the internal space of the clamping body  110 . The lift piece  170  may operate in conjunction with the fixing bolt  140 . 
     In this case, a bolt head portion  145  may be formed at a lower end of the fixing bolt  140  and has a relatively large diameter. The lift piece  170  may be supported by being caught upward by the bolt head portion  145  of the fixing bolt  140  positioned in the lower space of the internal space of the clamping body  110 . Therefore, when the fixing bolt  140  is moved upward or downward in the internal space of the clamping body  110  by the fixing nut  150 , the lift piece  170  may also move in the upward/downward direction while operating in conjunction with the fixing bolt  140 . 
     The lift piece  170  may be positioned between the pair of locking pressing pieces  180   a  and  180   b  in the lower space of the internal space of the clamping body  110 . One side of the lift piece  170  may be in contact with one  180   a  of the pair of locking pressing pieces  180   a  and  180   b , and the other side of the lift piece  170  may be in contact with the other  180   b  of the pair of locking pressing pieces  180   a  and  180   b . When the lift piece  170  moves in the upward/downward direction while operating in conjunction with the rotation of the fixing bolt  140  as described above, the lift piece  170  may move the respective locking pressing pieces  180   a  and  180   b  in the horizontal direction in the lower space. 
     To this end, an outer surface of the lift piece  170 , which is in contact with the pair of locking pressing pieces  180   a  and  180   b , may be inclined upward. Inner surfaces of the pair of locking pressing pieces  180   a  and  180   b  may be inclined in parallel with the outer surface of the lift piece  170 . Therefore, when the lift piece  170  moves upward, the locking pressing piece  180   a  and  180   b  being in contact with the inclined outer surface of the lift piece  170  are pushed outward and pressed and brought into close contact with the inner peripheral surface of the upper-end opening portion  1   a  of the support pole  1 . In this case, outer surfaces of the pair of locking pressing pieces  180   a  and  180   b  may be serrated to increase a contact force applied to the inner peripheral surface of the upper-end opening portion  1   a  of the support pole  1 . 
     Meanwhile, the outer surfaces of the pair of locking pressing pieces  180   a  and  180   b  may be formed as curved surfaces parallel to the inner peripheral surface of the support pole  1 . That is, the support pole  1  may be provided in the form of a circular hollow pipe, and the inner peripheral surface of the support pole  1  may be formed as a circular curved surface. The outer surfaces of the pair of locking pressing pieces  180   a  and  180   b  may correspond in shape to the inner peripheral surface of the support pole  1  to maximize contact areas of the pair of locking pressing pieces  180   a  and  180   b.    
     The lift piece  170  may be provided to move in the upward/downward direction while operating in conjunction with the upward and downward movements of the fixing bolt  140 . The lift piece  170  may be moved upward or downward by being guided by a pair of guide ribs  131  formed on the lower plate  130  positioned below the lift piece  170 . 
     The pair of guide ribs  131  may be spaced apart from each other while corresponding to a spacing distance between approximately outer surfaces of two opposite ends of the outer surface of the lift piece  170  which are not in contact with the pair of locking pressing pieces  180   a  and  180   b.    
     An operating process of the embodiment of the antenna clamping device according to the present invention configured as described above will be briefly described below with reference to the accompanying drawings (particularly,  FIGS. 9A and 9B ). 
     First, as illustrated in  FIG. 9A , the insertion-type clamping unit  100  may be fixedly inserted into the upper-end opening portion  1   a  of the support pole  1 . 
     Next, as illustrated in  FIG. 9B , when the fixing bolt  140  is rotated upward in the internal space of the clamping body  110  by the rotation of the fixing nut  150  in a locking direction, the lift piece  170  fitted with the bolt head portion  145  of the fixing bolt  140  may be moved upward by being guided by the pair of guide ribs  131 , and the pair of locking pressing pieces  180   a  and  180   b  may be pushed outward while penetrating the pair of through portions  115  by the upward movement of the lift piece  170 . Further, the serrated outer surfaces of the pair of locking pressing pieces  180   a  and  180   b  may be brought securely into close contact with the inner peripheral surface of the support pole  1 , such that the clamping body  110  may be fixed so as not to be arbitrarily separated from the support pole  1 . 
     The embodiment of the antenna clamping device according to the present invention has been described as including the antenna clamping unit  10 , the insertion-type clamping unit  100 , and the support bracket unit  50 . However, an embodiment in which the support bracket unit  50  is removed may be implemented. The embodiment in which the support bracket unit  50  is removed and only the antenna clamping unit  10  and the insertion-type clamping unit  100  are included may be defined as another embodiment of the antenna clamping device according to the present invention. 
     One and other embodiments of the antenna clamping device according to the present invention have been described above in detail with reference to the accompanying drawings. However, the present invention is not necessarily limited by one and other embodiments, and various modifications of the embodiments and any other embodiments equivalent thereto may of course be carried out by those skilled in the art to which the present invention pertains. Accordingly, the true protection scope of the present invention should be determined by the appended claims. 
     INDUSTRIAL APPLICABILITY 
     The present invention provides the antenna clamping device capable of being seated directly on the opened upper end of the support pole and securely fixed to the internal space of the upper end of the support pole without a separate fixing device.