Abstract:
A sprinkler mounting device that support units are joined to T-shaped frames and a support bar through screws, thereby providing a strong and firm mounted state and preventing a separation of the support units from the support bar during work.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a sprinkler mounting device that support units are joined to T-shaped frames and a support bar through screws, thereby providing a strong and firm mounted state and preventing a separation of the support units from the support bar during work even though the mounting device is in an open type that a reducer is fit into a mounting bracket from the front. 
     2. Background Art 
     In general, as shown in  FIG. 1 , a sprinkler mounting device includes: a pair of T-shaped frames  1  mounted on a ceiling parallel with each other at a predetermined interval; a pair of support units  2  perpendicularly standing and joined to the T-shaped frames  1 ; a support bar  3  disposed on upper portions of the support units  2  in such a way as to cross the T-shaped frames  1 ; and a mounting bracket  4  mounted on the support bar  3  in a laterally movable manner, so that a reducer  5  is joined thereto. 
     Conventionally, the sprinkler mounting device is divided into two types: one being a separate type that the support bar  3  is separated from the support units  2 ; and the other being an integral type that bent portions, which serve the same role as the support units  2 , are formed at both end portions of the support bar  3 . Moreover, the mounting bracket  4  is divided into a closed type that the reducer  5  is perpendicularly and downwardly fit thereto and an open type that the reducer  5  fit the mounting bracket  4  from the front. 
     However, as shown in  FIG. 1 , the integral type mounting device that the support bar  3  is formed integrally with the support units  2  has a merit in that it provides a strong and firm joining structure, but a demerit in that a standardized rectangular pipe cannot be used as the support bar  3  differently from the separate type. 
     Furthermore, as shown in  FIG. 2 , the separate type mounting device that the support bar  3  and the support units  2  are manufactured in a separate form has several problems in that it is structurally weak since the support bar  3  and the T-shaped frames  1  are assembled to the support units  2  in a forcedly-fitting manner, and in that a user has to hold the mounting bracket  4  with one hand standing on a foothold since there is no a means for supporting the mounting bracket  4  during mounting work of the reducer  5  in case that the open type mounting bracket  4  to be fit to the support bar  3  is used. 
     SUMMARY OF THE INVENTION 
     Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior arts, and it is an object of the present invention to provide a sprinkler mounting device, that can provide the same strong and firm joining structure as the integral type even though a rectangular-shaped pipe is used as a support bar since fastening screws fixed to support units by penetrating a support bar and T-shaped frames is used, and that can allow a user to easily perform mounting work of a reducer since a supporting means for supporting the support bar is additionally mounted on a mounting bracket, to which the reducer is fit from the front, and, which has an openable and closeable opening. 
     To accomplish the above object, according to the present invention, there is provided a sprinkler mounting device comprising: T-shaped frames each including a projecting jaw portion formed on an upper portion thereof and formed by a sidewall having a slot; support units, each including a vertical body, a horizontal plane portion bent to one side and formed at an upper portion of the vertical body, a first screw hole formed on the horizontal plane portion, a fastening screw joined to the support unit and the support bar through the first screw hole and having a tip portion penetrating the support bar, support portions projecting from the horizontal plane portion, a pressurizing member having both end portions, which are axially mounted to the support portions, the pressurizing member having pressure portions pressing the support bar when the pressurizing member is laid down, a rectangular hole formed beneath the horizontal plane portion for allowing an insertion of the support bar, an elastic member having upper portions hingedly joined to a central portion of the vertical body and a bent portion formed on a lower portion thereof to clamp a lower end of the projecting jaw portion, a joining portion formed on a lower portion of the vertical body for fixing the projecting jaw portion thereinto, a second screw hole formed on the joining portion, and a fastening screw joined to the support unit and the T-shaped frame through the second screw hole and having a sharp tip portion penetrating the projecting jaw portion; a support bar with a rectangular section, whose both end portions are fit into the rectangular holes of the support units, the support bar crossing the T-shaped frames; and a mounting bracket including a body having a mounting portion for fitting the reducer thereto from the front, a rotating member having one side axially mounted on the front of the body for opening and closing the mounting portion and the other side having a groove, a fastening member to which the groove is fit, restricting jaw portions formed on both sides of the rear part of the mounting portion in such a way as to be bent upwardly for supporting the support bar, a first tightening screw mounted on an upper portion of the rear part of the body for tightening the support bar, and a second tightening screw joined to the center of the rotating member for closely contacting the reducer to the support bar. 
     As described above, the sprinkler mounting device according to the present invention can achieve the same strong and firm joining structure as the integral type support bar even though the mounting device is in the separate type that the standardized rectangular pipe is used as the support bar since the tip portions of the fastening screws penetrate and fasten the support bar and the T-shaped frames when the fastening screws are tightened in a state where the support bar and the T-shaped frames are joined to the support units by the elastic member and the pressurizing member. Furthermore, the present invention can provide a user with an easy mounting work of the reducer since the mounting bracket is fixed by the first tightening screw and the restricting jaw portion and there is no need for the user to hold the mounting bracket with the hand when the reducer is mounted on the mounting portion. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other objects, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention in conjunction with the accompanying drawings, in which: 
         FIG. 1  is a perspective view of a conventional sprinkler mounting device that a support bar and support units are formed integrally; 
         FIG. 2  is a perspective view of another conventional sprinkler mounting device that a support bar and support units are formed separately; 
         FIG. 3  is a perspective view of a sprinkler mounting device according to the present invention; 
         FIG. 4  is a sectional view of a mounting bracket of the present invention; 
         FIG. 5  is a sectional view of support units of the present invention; 
         FIG. 6  is a sectional view showing a state where the mounting bracket is joined to the support bar according to the present invention; 
         FIG. 7  is a sectional view showing a joined state of the support units according to the present invention; and 
         FIG. 8  is a sectional view showing a state where a reducer is joined to the mounting bracket according to the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Reference will be now made in detail to the preferred embodiment of the present invention with reference to the attached drawings. 
     As shown in  FIG. 3 , a sprinkler mounting device includes: a pair of T-shaped frames  10  mounted on a ceiling parallel with each other at a predetermined interval; a pair of support units  20  perpendicularly standing and joined to the T-shaped frames  10 ; a support bar  30  disposed on upper portions of the support units  20  in such a way as to cross the T-shaped frames  10 ; and a mounting bracket  40  mounted on the support bar  30  in a laterally movable manner, so that a reducer  50  is joined thereto. 
     Each of the T-shaped frames  10  includes a projecting jaw portion  101  formed on an upper portion thereof and formed by an one-ply sidewall having a slot  102 , and is unfit for joining the support unit  20  thereto using a fastening screw  213  having a sharp tip portion  214  since a lower portion of the projecting jaw portion  101  is relatively weak. For this reason, typically, a blunt-ended tightening screw is mounted to a lower end of the projecting jaw portion  101  in such a way as to be caught to the lower end of the projecting jaw portion  101 , so that a joining portion  211  is not separated from the projecting jaw portion  101 . (See  FIG. 1 ) 
     As shown in  FIGS. 3 and 4 , each of the support units  20  includes: a vertical body  200 ; a horizontal plane portion  201  bent to one side and formed at an upper portion of the vertical body  200 ; a first screw hole  202  formed on the horizontal plane portion  201 ; a fastening screw  203  joined to the support unit  20  and the support bar  30  through the first screw hole  202  and having a tip portion  204  penetrating the support bar  30 ; support portions  205  projecting from the horizontal plane portion  201 ; a pressurizing member  206  having both end portions, which are axially mounted to the support portions  205 , the pressurizing member  206  having pressure portions  207  pressing the support bar  30  when the pressurizing member  206  is laid down; a rectangular hole  208  formed beneath the horizontal plane portion  201  for allowing an insertion of the support bar  30 ; an elastic member  209  having upper portions hingedly joined to a central portion of the vertical body  200  and a bent portion  210  formed on a lower portion thereof to clamp a lower end of the projecting jaw portion  101 ; a joining portion  211  formed on a lower portion of the vertical body  200  for fixing the projecting jaw portion  101  thereinto; a second screw hole  212  formed on the joining portion  211 ; and the fastening screw  213  joined to the support unit  20  and the T-shaped frame  10  through the second screw hole  212  and having the sharp tip portion  214  penetrating the projecting jaw portion  101 . The vertical body  200  includes: hinge portions  215  formed at both sides of the center thereof for rotatably joining both ends of the elastic member  209 ; a retaining portion  216  put on an upper end of the projecting jaw portion  101 ; and an inclined retaining portion  217  put on a lower end of the projecting jaw portion  101 . 
     The support bar  30  is a standardized pipe with a rectangular section, which is cut according to an interval of the support units  20  mounted on the T-shaped frames  10 . 
     As shown in  FIGS. 3 and 5 , the mounting bracket  40  includes: a body  400  having a mounting portion  401  for fitting the reducer  50  thereto from the front; a rotating member  402  having one side axially mounted on the front of the body  400  for opening and closing the mounting portion  401  and the other side having a groove  403 ; a fastening member  404  to which the groove  403  is fit; restricting jaw portions  405  formed on both sides of the rear part of the mounting portion  401  in such a way as to be bent upwardly for supporting the support bar  30 ; a first tightening screw  406  mounted on an upper portion of the rear part of the body  400  for tightening the support bar  30 ; and a second tightening screw  407  joined to the center of the rotating member  402  for closely contacting the reducer  50  to the support bar  30 . The body  400  includes a projecting portion  408  formed on one side of the front part thereof for supporting a standing state of the rotating member  402 . The fastening member  404  may be a tightening screw for tightening the rotating member  402  to the body  400  in a state where the groove  403  is fit thereto. 
     As described above, as shown in  FIG. 6 , the support bar  30  is inserted into the rear part of the mounting bracket  40  in such a way as to be supported by the restricting jaw portions  405  in back and forth directions, and then, the first tightening screw  406  tightens and fixes the support bar  30  to the mounting bracket  40 . 
     When the pressurizing member  206  axially mounted on the support portions  205  is rotated after both sides of the support bar  30 , to which the mounting bracket  40  is joined, are inserted into the rectangular holes  208  of the support units  20 , the pressure portion  207  presses and fixes the support bar  30 . After that, when the fastening screw  203  of the first screw hole  202  is tightened in such a way as to penetrate and fasten the support bar  30  in order to integrate the support bar  30  and the support units  20  with each other. 
     When the joining portion  211  of each support unit  20  is fit to the projecting jaw portion  101  of each T-shaped frame  10 , the lower end of the projecting jaw portion  101  is supported by the bent portion  210  of the elastic member  209  and the inclined retaining portion  217 , and the upper end of the projecting jaw portion  101  is supported by the retaining portion  216 . In the above state, when the fastening screw  213  of the second screw hole  212  is tightened in such a way that the tip portion  214  penetrates the projecting jaw portion  101  in order to integrate the support unit  20  and the T-shaped frame  10  with each other, as shown in  FIG. 7 , The T-shaped frame  10  and the support bar  30  are mounted integrally to the support unit  20  by the fastening screws  203  and  213 . 
     In a state where the T-shaped frame  10  and the support bar  30  respectively integrated to the support unit  20  are mounted on a ceiling, the reducer  50  having a head  60  is pushed into the mounting portion  401 , and then, the rotating member  402  is rotated until the groove  403  is caught to the fastening member  404  and an entrance of the mounting portion  401  is closed. After that, in the state where the entrance of the mounting portion  401  is closed, when the second tightening screw  407  is tightened, as shown in  FIG. 8 , the reducer  50  is mounted and fixed in a state where it is in a close contact with the support bar  30 , whereby mounting work of a sprinkler is finished. 
     By conducting work to mount the reducer  50  to the mounting bracket  40  standing on a foothold and work to integrate the T-shaped frame  10  and the support bar  30  with the support units  20  on the floor, a user can rapidly and conveniently perform mounting work of the sprinkler. 
     As described above, the sprinkler mounting device according to the present invention can achieve the same strong and firm joining structure as the integral type support bar even though the mounting device is in the separate type that the standardized rectangular pipe is used as the support bar  30  since the tip portions  204  and  214  of the fastening screws  203  and  213  penetrate and fasten the support bar  30  and the T-shaped frames  10  when the fastening screws  203  and  213  are tightened in a state where the support bar  30  and the T-shaped frames  10  are joined to the support units  20  by the elastic member  209  and the pressurizing member  206 . Furthermore, the present invention can provide the user with an easy mounting work of the reducer  50  since the mounting bracket  40  is fixed by the first tightening screw  406  and the restricting jaw portion  405  and there is no need for the user to hold the mounting bracket  40  with the hand when the reducer  50  is mounted on the mounting portion  401 . 
     While the present invention has been described with reference to the particular illustrative embodiment, it is not to be restricted by the embodiment but only by the appended claims. It is to be appreciated that those skilled in the art can change or modify the embodiment without departing from the scope and spirit of the present invention.